JP5979578B2 - Ice heat storage device - Google Patents

Description

  The present invention relates to an ice heat storage device capable of storing cold energy by passing a refrigerant through a submerged heat exchanger and making ice on the outer surface of the heat exchanger.

  In Patent Document 1 below, the coolant is passed through the cooling pipe (6) provided on the cooling plate (2), and water is sprinkled from the spray pipe (3) to the cooling plate (2), so that the cooling plate (2) and the cooling pipe are used. While making the ice on the outer surface of (6), when taking out the cold heat, water in the bottom of the tank is sprayed through the heat exchanger (9) with the refrigerant supply to the cooling pipe (6) stopped. An ice making device is disclosed in which water is sprayed from the pipe (3) to the cooling plate (2) and the cold heat is taken out in the heat exchanger (9). In this ice making device, in two adjacent cooling plates (2), the cooling pipe (6) of one cooling plate (2) is staggered vertically with the cooling pipe (6) of the other cooling plate (2), Arranged in a staggered pattern.

  Moreover, in the following patent document 2, in the state which piled up the board | plate material (2), an inlet pipe (6) and an outlet pipe (7) were provided in the upper end side part, and a board | plate material (in the outer peripheral part of a board | plate material (2) ( 2) Welding each other on the plate surface, and applying appropriate welding to the plate surface on the inner side so as to form the refrigerant flow path (8), and then expanding the unwelded portion from the inside A heat exchanger in which a refrigerant channel (8) is formed by expanding and deforming is disclosed.

Japanese Patent No. 3909911 (paragraph numbers 0022-0023, FIGS. 1 and 4) JP 2001-21274 A (FIGS. 2 and 3) Japanese Patent No. 3790207 (FIGS. 1 and 4)

  The heat exchanger described in Patent Document 1 is formed by welding a tubular cooling pipe (6) to a flat cooling plate (2), or formed by an extruded shape member in such a shape. However, the cross section of the refrigerant flow path is simply circular, and there is room for improvement in ice making efficiency.

  That is, for example, when a coil-type heat exchanger as disclosed in Patent Document 3 is used, the coil (35) as the refrigerant flow path is merely arranged in the heat storage tank (36), so that the ice As the ice grows, the contact area between ice and water increases. However, in the invention described in Patent Document 1, even if ice grows, the contact area between ice and water does not increase. Moreover, in invention of patent document 1, since it is a watering type, it can be said that the cooling plate (2) is provided.

  On the other hand, in the invention described in Patent Document 2, the entire plate surface becomes the refrigerant flow path (8), and in this case, ice adheres to the entire plate surface of the heat exchanger (24), and the contact between ice and water occurs. The area does not increase and the ice-making efficiency is poor.

  The problem to be solved by the present invention is to provide an ice heat storage device that can efficiently make ice by increasing the contact area between ice and water by changing the degree of ice on the plate-shaped heat exchanger. There is.

The present invention, the problem has been made in order to solve a first aspect of the present invention, the bulging portion the plate surface by welding the plate material between superimposed is made at least the plate surface and a non-bulging portion is divided into preparative, although Ru Tei refrigerant flow path is bulging deformation in a direction away between plate material is formed in the bulging portion, at least a portion of the coolant channel, the coolant flow path width direction A heat exchanger partitioned into a plurality of regions, storing the heat exchanger and storing water, and making ice on the outer surface of the heat exchanger by the refrigerant passed through the refrigerant flow path of the heat exchanger. A heat storage tank capable of storing cold heat, wherein the bulging portion and the non-bulging portion are each formed as a region surrounded by a welded portion, and the heat exchanger is configured by stacking the plate members together. The outer periphery of the plate is welded to the entire outer periphery and By being welded to the plate surface in the inside than, it is with the bulging portion as an area enclosed by each weld divided into a said non-bulging portion, at least a portion of the bulging portion, the width direction There are partition is welded into a plurality of regions, in Rukoto each partitioned region is bulged deformation, the refrigerant flow passage is partitioned into a plurality of areas in the width direction, the refrigerant for the refrigerant flow path An inlet and a refrigerant outlet are provided on the plate surface of the plate material, and the refrigerant flow path is formed from above to below while meandering left and right in the heat exchanger standing on the heat storage tank. The flow path is formed in a shape in which linear portions along the left-right direction are spaced apart from each other at equal intervals, and linear portions adjacent in the vertical direction are alternately connected to each other by a semicircular portion. This refrigerant flow path has an upper end at the refrigerant inlet. On the other hand, the other lower end portion is a refrigerant outlet, and the plate members are welded so as to partition the refrigerant flow path into a plurality of regions in the width direction in the middle portion excluding these both end portions. It is an ice heat storage device.

According to invention of Claim 1, the plate | board surface of a heat exchanger is divided into a bulging part and a non-bulging part, and the bulging part and the non-bulging part are the area | regions each surrounded by the welding part. made form as a bulged portion is formed by bulging from the plate surface. In particular, non-swollen portion, the mere weld (weld line) without being made form as a region surrounded by the welded portion. In this way, the plate surface of the heat exchanger can be divided into a “portion through which the refrigerant passes” bulging from the plate surface and a “portion through which the refrigerant does not pass” that remains on the plate surface. Moreover, since the refrigerant flow path is at least partially partitioned into a plurality of regions in the width direction, the “portion through which the refrigerant passes” can be further divided into a plurality of convex portions. With such a configuration, it is possible to make ice efficiently by changing the degree of ice depending on the portion of the heat exchanger, making the surface of the ice uneven, increasing the contact area between ice and water.

According to the invention described in claim 1, together with the welded all around at the outer peripheral edge surface by overlapping sheet material, by being welded to the plate surface, the bulging portion is Ru is formed. By forming a bulging portion as a region surrounded by the welded portion in the region inside the outer peripheral edge of the plate material, there is also a relationship with the welded portion on the outer peripheral end surface. The protruding portion is also formed as a region surrounded by the welded portion. Therefore, when the heat exchanger is used, leakage of the refrigerant to the outside can be prevented by welding the outermost peripheral portion even if the welding of the bulging portion is broken. In addition, since the refrigerant inlet and the refrigerant outlet for the refrigerant flow path are provided on the plate surface of the plate material, when welding and bulging and deforming so as to open a gap between the plate materials after welding the portion that becomes the bulge portion, the fluid flows from the plate surface. Easy to press fit.

According to the first aspect of the present invention, a refrigerant flow path is formed from the upper side to the lower side while meandering from side to side and the refrigerant is passed from the upper side to the lower side, whereby the lubricating oil of the compressor dissolved in the refrigerant is subjected to heat exchange. Accumulation in the vessel can be prevented. Further, in the middle part excluding both ends of the refrigerant flow path, by welding the plate materials so as to partition the refrigerant flow path into a plurality of regions in the width direction, it can be divided into a plurality of bulging parts, By making the surface of the surface uneven, the contact area between ice and water can be increased to make ice efficiently.

Furthermore, in the invention according to claim 2 , the heat storage tank is provided with a plurality of the heat exchangers, and the adjacent heat exchangers facing each other extend in the left-right direction in the refrigerant flow path. The ice heat storage device according to claim 1 , wherein the location to be moved is shifted up and down.

According to the second aspect of the present invention, the swelled portions of the heat exchangers facing each other are shifted as much as possible, so that it is possible to prevent the ices of the adjacent heat exchangers from being combined. it can. Moreover, such an effect can be realized only by shifting the heat exchanger up and down.

  According to the present invention, by changing the degree of ice attached to the plate-shaped heat exchanger, the contact area between ice and water can be increased and ice can be made efficiently.

It is a schematic longitudinal cross-sectional view which shows one Example of the ice thermal storage apparatus of this invention, and has shown the state seen from the front. It is a schematic longitudinal cross-sectional view of the ice thermal storage apparatus of FIG. 1, and has shown the state seen from the side surface. It is a schematic perspective view which shows a part of heat exchanger group of the right side of the ice thermal storage apparatus of FIG. It is a schematic longitudinal cross-sectional view of each heat exchanger of the ice thermal storage apparatus of FIG. 1, and one part is abbreviate | omitted and shown. It is a schematic longitudinal cross-sectional view which shows the ice making state to the heat exchanger of the ice thermal storage apparatus of FIG. 1, and has expanded and shown a part of heat exchanger. It is a figure which shows the modification of the ice thermal storage apparatus of FIG. 1, and has shown a part of heat exchanger in a thermal storage tank.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.
1 and 2 are schematic longitudinal sectional views showing an embodiment of the ice heat storage device 1 of the present invention. FIG. 1 shows a state seen from the front, and FIG. 2 shows a state seen from the side. The ice heat storage device 1 of the present embodiment is a static type and an external melting type ice heat storage device.

  The ice heat storage device 1 of the present embodiment has a refrigerant stored between the heat storage tank 2 in which water is stored, one or a plurality of heat exchangers 3 disposed in the heat storage tank 2, and the heat exchanger 3. A refrigerating device 4 for circulation and an air supply means 5 for sending air into the stored water in the heat storage tank 2 are provided. And after operating the freezing apparatus 4 and making ice on the outer surface of the heat exchanger 3, the freezing apparatus 4 is stopped and the cold water in the thermal storage tank 2 is used with the cold water use equipment 6. FIG.

  The shape of the heat storage tank 2 is not particularly limited, but in this embodiment, it is rectangular, in other words, a hollow rectangular parallelepiped shape. A heat exchanger 3 is disposed in the heat storage tank 2 and water is stored until the heat exchanger 3 is submerged.

  The heat exchanger 3 has a plate shape, and a plurality of heat exchangers 3 are provided in the heat storage tank 2 in this embodiment. Specifically, in the heat storage tank 2, heat exchanger groups 7, 7 including a plurality of heat exchangers 3, 3,... Are provided on the left and right, and each heat exchanger 3 of each heat exchanger group 7 is The plate surfaces are arranged facing each other at a predetermined interval with the plate surface facing forward and backward. Each heat exchanger 3 has the same configuration including shape and size.

  FIG. 3 is a schematic perspective view showing a part of the heat exchanger group 7 on the right side in the heat storage tank 2, and FIG. 4 is a schematic vertical sectional view of each heat exchanger 3, and a part thereof is omitted. It shows.

  The manufacturing method of each heat exchanger 3 will be described. First, the overlapped plate members 8 and 8 are welded at least on the plate surface, and the plate surface is divided into the bulging portion 9 and the non-bulging portion 10 by the welding. At this time, the bulging portion 9 and the non-bulging portion 10 are respectively a region surrounded by the welded portion (weld line) 11 or a region surrounded by the welded portion 11 and the edge of the plate member 8. Formed as. When the mouth portion 12 (which is a refrigerant inlet / outlet and can also be used as an inlet for press-fitting fluid that bulges and deforms the bulging portion 9) is provided on the plate surface, the bulging portion 9 is an area surrounded by the welded portion 11. When the mouth portion 12 is provided at the end side of the plate member 8, the bulging portion 9 is formed as a region surrounded by the welded portion 11 and the end side of the plate member 8. In any case, the non-bulged portion 10 is formed as a region surrounded by the welded portion 11 or as a region surrounded between the welded portion 11 and the edge of the plate member 8. After dividing the plate surface into the bulging portion 9 and the non-bulging portion 10 in this way, a fluid is press-fitted into the bulging portion 9 from the mouth portion 12 provided in advance, and the plate material 8 is formed in the bulging portion 9. , 8 bulges and deforms in the direction separating the distances 8 to form the refrigerant flow path 13. However, in at least a part of the refrigerant flow path 13, the refrigerant flow path 13 is partitioned by a plurality of regions 11 in a plurality of regions in the width direction.

  In the present embodiment, the heat exchanger 3 is more specifically formed as follows. That is, first, two plate members 8 and 8 are overlapped, and the entire circumference is welded (for example, laser welding) 11 on the outer peripheral end face. Then, after evacuating from the mouth portion 12 formed in advance on the plate surface, the gap between the plate members 8 and 8 is reduced, and then the outer periphery of the plate member 8 in a state where the gap between the plate members 8 and 8 is held under reduced pressure. The plate members 8 and 8 are welded (for example, laser welding) 11 to the bulging portion 9 and the non-bulging portion 10 on the plate surface inside the portion.

  At this time, the bulging portion 9 is formed as a region surrounded by the welded portion 11 in a region inside the outer peripheral edge of the plate member 8. Further, welding 11 is performed so that the mouth portion 12 is disposed in the region inside the bulging portion 9. Thereafter, an appropriate fluid is press-fitted into the bulging portion 9 from the mouth portion 12, and the bulging portion 9 is bulged and deformed so as to open a gap between the plate members 8 and 8 in the bulging portion 9. In the case of such a configuration, the bulging portion 9 and the non-bulging portion 10 are each formed as a region surrounded by the welded portion 11. Therefore, when the heat exchanger 3 is used, even if the weld 11 of the bulging portion 9 is damaged, the outermost peripheral weld 11 can prevent the refrigerant from leaking to the outside.

  When the mouth portion 12 is provided on the plate surface, the press-fitting fluid from the hole (mouth portion 12) provided in the one plate material 8 at the location of the mouth portion 12 causes the other plate material 8 to pass through the entire area of the hole. After being pushed away from the one plate member 8, the entire bulging portion 9 is bulged and deformed so as to widen the gap between the plate members 8,8. Therefore, when the mouth portion 12 is provided on the plate surface, it is easier to perform bulging deformation that opens a gap between the plate materials 8 and 8 than when the mouth portion 12 is provided on the end side of the plate material 8.

  Further, in this embodiment, during welding on the plate surface described above, the midway portion of the region inside the bulging portion 9 excluding the mouth portion 12 and the surrounding setting region is the bulging portion 9 (refrigerant flow path). 13) is partitioned into a plurality of regions in the width direction by welding (for example, laser welding). And the refrigerant | coolant flow path 13 is divided and formed in the several area | region in the width direction by bulging and deforming each area | region divided.

  Although the shape of the bulging portion 9 is not particularly limited, in this embodiment, as shown in FIG. 3, the bulging portion 9 is formed to meander from side to side from the upper part to the lower part of the plate surface. More specifically, the linear portions along the left-right direction are arranged at equal intervals in the vertical direction, and the linear portions adjacent to each other in the vertical direction are alternately connected to each other by a semicircular portion. . And the opening part 12 is provided in the longitudinal direction both ends (upper right part and right lower part of FIG. 3) of the bulging part 9 formed by meandering in this way, and this opening part 12 is the refrigerant | coolant piping 14. Connected to. Further, the bulging portion 9 is divided into a plurality (three in the illustrated example) as appropriate in the width direction by welding, except for both end portions of the meandering refrigerant flow path 13. In addition, the welding strength for this purpose is ensured by folding the end portion of the weld into a loop shape (FIG. 1).

  The heat exchanger 3 is used in a state where it is submerged in the heat storage tank 2, and the refrigerant from the refrigeration apparatus (condensing unit) 4 is passed through the expansion portion 9 via an expansion valve (not shown). At this time, preferably, the upper mouth portion 12 is used as a refrigerant inlet, while the lower mouth portion 12 is used as a refrigerant outlet. In this way, by passing the refrigerant from the upper side to the lower side of the heat exchanger 3, it is possible to prevent the lubricating oil of the compressor dissolved in the refrigerant from accumulating in the heat exchanger 3.

  By operating the refrigeration apparatus 4, ice can be made on the outer surface of the heat exchanger 3. And after ice making, the water in the thermal storage tank 2 can be used with the cold water use equipment 6. FIG. In the illustrated example, the cold water from the heat storage tank 2 is used in the cold water use facility 6 and then returned to the heat storage tank 2, but depending on the case, the cold water from the heat storage tank 2 is used in the cold water use facility 6 Later, it may be disposable. In that case, the heat storage tank 2 may be appropriately supplied with water.

  Note that typically, the refrigeration apparatus 4 is operated using nighttime electric power with a low electricity bill, and water in the heat storage tank 2 is frozen on the outer surface of the heat exchanger 3. At this time, not all the water in the heat storage tank 2 is frozen, and it is preferable that the ice on the outer surface of each heat exchanger 3 is not connected to each other. In the daytime, the cold water in the heat storage tank 2 is used in the cold water use facility 6. The cold water use facility 6 is not particularly limited, but is, for example, an air conditioning facility or a food machine.

  When the refrigeration apparatus 4 is operated to make ice on the outer surface of the heat exchanger 3 in the heat storage tank 2 and / or when the cold water in the heat storage tank 2 is used in the cold water use facility 6 after ice making, air supply means It is preferable to drive 5 and to stir the water in the heat storage tank 2.

  In the present embodiment, the ice heat storage device 1 includes air supply means 5 that ejects air into the stored water in the heat storage tank 2 when making ice and using cold water. The air supply means 5 is the blower 15 in this embodiment, but may be an air pump depending on circumstances. In the following description, the air supply means 5 will be described as being a blower 15, but the same applies to an air pump.

  The blower 15 is preferably arranged on the upper part of the heat storage tank 2 in order to reliably prevent the backflow of water from the heat storage tank 2. And the air from the blower 15 is discharged | emitted in stored water via the air reservoir member 16 provided in the bottom part of the thermal storage tank 2. FIG.

  Although the air reservoir member 16 may be installed directly under each heat exchanger 3, in this embodiment, between the adjacent front and rear heat exchangers 3, 3 (and with the heat exchangers 3 at both front and rear ends if desired) It is installed in the center in the front-rear direction of the gap between the heat storage tank 2 and the wall. In any case, the air reservoir member 16 is disposed in parallel with the lower end side of the heat exchanger 3 and at the same height as the lower end side of the heat exchanger 3.

  If the air reservoir member 16 is disposed not in the heat exchanger 3 but in the gap between the front and rear heat exchangers 3 and 3, the plate-like heat exchangers 3 and 3 or the plate-like heat exchanger Effective bubbling can be performed by smoothly ejecting air into the gap between the ices I and I adhering to the outer surfaces 3 and 3. Further, if the air reservoir member 16 is not disposed directly under the heat exchanger 3 but in the gap between the front and rear heat exchangers 3 and 3, the air reservoir member 16 described later can be easily attached and detached and cleaned.

  The air reservoir member 16 of the present embodiment is made of a U-shaped material that opens downward, and both ends in the longitudinal direction thereof are closed with a plate material. Thereby, the air from the blower 15 can be stored in the air reservoir member 16. In the air reservoir member 16, air ejection holes 17 are formed in the front and rear side walls at equal intervals in the left-right direction. Therefore, the air from the blower 15 is discharged into the gap between the front and rear heat exchangers 3 and 3 through the air reservoir member 16, and the convection of water in the heat storage tank 2 can be achieved by the rising of the bubbles.

  Since the air reservoir member 16 is formed of a member opened downward, it is possible to prevent dirt from staying in the air reservoir member 16. In other words, even if water flows backward into the air reservoir member 16 due to the stop of the blower 15 and dirt enters the air reservoir member 16, the dirt does not accumulate in the air reservoir member 16 and falls down. Moreover, if the air reservoir member 16 is configured to be detachable from the heat storage tank 2, not only can the air reservoir member 16 be removed to clean the air reservoir member 16, but also dirt accumulated at the bottom of the heat storage tank 2 can be cleaned. You can also.

  A vertical tube 18 and a horizontal tube 19 are connected between the air reservoir member 16 and the blower 15. That is, at the bottom of the heat storage tank 2 in the left-right direction (the right end of the left heat exchanger group 7 and the left end of the right heat exchanger group 7), a horizontal pipe 19 is provided along the front-rear direction. The distal end portion of the horizontal tube 19 is closed. Further, the lower end portion of the vertical tube 18 is connected to the proximal end portion of the horizontal tube 19. Further, the upper end portion of the vertical pipe 18 is connected to the blower 15 via a check valve 20 in the upper portion of the heat storage tank 2.

  The horizontal pipe 19 and each air reservoir member 16 are connected via a tube 21. That is, on the peripheral side wall of the horizontal tube 19, pipes 22 that communicate the inside and outside of the horizontal tube 19 are provided at equal intervals in the front-rear direction, while one end in the longitudinal direction of the air reservoir member 16 ( A pipe 23 that communicates the inside and outside of the air reservoir member 16 is provided at the end), and both the pipes 22 and 23 are connected by a tube 21.

  The air reservoir member 16 is preferably provided so as to be detachable from the heat storage tank 2. Specifically, at the lower end of each of the left and right heat exchanger groups 7, a first support member 24 that holds one end of the air reservoir member 16 is provided at the inner end in the left-right direction of the heat storage tank 2. A second support member 25 that holds the other end portion of the air reservoir member 16 is provided at an end portion on the outer side in the left-right direction of the heat storage tank 2. The 1st support material 24 consists of a downward U-shaped material, and is arrange | positioned along the front-back direction. The second support member 25 is also arranged along the front-rear direction and is made of a substantially L-shaped material having a vertical piece 26 and a horizontal piece 27, and extends from the upper end of the vertical piece 26 to the outside in the left-right direction of the heat storage tank 2. The horizontal piece 27 is arranged.

  On the other hand, the air reservoir member 16 is provided with a pipe 23 at one end (an end on the inner side in the left-right direction of the heat storage tank 2), and has a plate-like shape at the other end (the outer end in the left-right direction of the heat storage tank 2). A pair of upper and lower holding pieces 28, 28 are provided extending horizontally. Accordingly, the air reservoir member 16 is placed on the upper wall of the first support member 24 after the upper support piece 28 is placed on the horizontal piece 27 so that the second support member 25 is sandwiched between the pair of upper and lower holding pieces 28, 28. When the pipe 23 is placed, the pipe 23 is sandwiched between the upper wall of the first support member 24 and the pipe presser 29, and the pipe presser 29 is detachably attached to the upper wall of the first support member 24 with a screw. Good.

  By the way, as shown in FIG. 1, a space, preferably a work space 30 in which a person can enter, is formed in the center in the left-right direction in the heat storage tank 2. Therefore, the air reservoir member 16 can be easily attached and detached from the work space 30. The size of the work space 30 is appropriately set, but the width dimension in the left-right direction (separation distance in the left-right direction between the left and right heat exchanger groups 7, 7) W is 300 mm or more, preferably 400 to 500 mm. As the space of the width dimension, it is provided along the front-rear direction at the center in the left-right direction of the heat storage tank 2.

  FIG. 5 is a schematic longitudinal sectional view showing an ice making state for the heat exchanger 3 in the heat storage tank 2, and shows a part of the heat exchanger 3 in an enlarged manner. As shown in this figure, in this embodiment, the plate surface of the heat exchanger 3 is divided into a bulging portion 9 and a non-bulging portion 10, and the non-bulging portion 10 is not a mere welded portion (welding line) 11. The bulging portion 9 is formed as a region surrounded by the welded portion 11 or as a region surrounded by the welded portion 11 and the edge of the plate member 8, and the bulging portion 9 is formed by bulging from the plate surface. Thereby, the plate surface of the heat exchanger 3 can be divided into a “portion through which the refrigerant passes” that bulges from the plate surface and a “portion through which the refrigerant does not pass” that remains on the plate surface. Moreover, since the coolant channel 13 is partitioned into a plurality of regions in the width direction, the “portion through which the coolant passes” can be further divided into a plurality of convex portions. In this way, by changing the condition of the ice I depending on the part of the heat exchanger 3, the surface of the ice I can be made uneven so that the contact area between the ice and water can be increased, and ice can be made efficiently. .

  FIG. 6 is a view showing a modification of the ice heat storage device 1 of the above embodiment, and shows a part of the heat exchanger 3 in the heat storage tank 2. As shown in this figure, in each of the left and right heat exchanger groups 7, the heat exchangers 3, 3 facing each other in the front-rear direction are located in a portion (linear shape) extending in the left-right direction in the refrigerant flow path 13. Part) may be shifted up and down. Specifically, in FIG. 6, left and right heat exchange is performed at the center in the vertical direction between the linear portions of the central heat exchanger 3 (the linear portions of the refrigerant flow path 13 divided into three in the width direction). The straight portion of the vessel 3 is arranged. If comprised in this way, it can prevent to the maximum that ice I of I and I of adjacent heat exchangers 3 and 3 couple | bond together. In addition, when the linear portions are arranged so as to be shifted up and down between the adjacent heat exchangers 3 and 3, the coupling distance between the ices I and I is longer than when the linear portions are arranged without being shifted up and down. In addition, it is possible to increase the ice making limit that can be efficiently operated when cold water is taken out. And such an effect can be implement | achieved only by shifting the heat exchanger 3 up and down.

The ice heat storage device 1 of the present invention is not limited to the configuration of the above embodiment, and can be changed as appropriate.
For example, in the embodiment, when the heat exchanger 3 is manufactured, the outer peripheral portions of the two plate members 8 and 8 are welded to the end surfaces. That is, the outermost peripheral portion may be welded along the end side on the plate surface of the plate 8.

  In the above embodiment, the air reservoir member 16 is provided with the air ejection holes 17 on the front and rear side walls, but may be provided on the upper wall instead of or in addition to this.

  Furthermore, although the said Example demonstrated the example which sends cold water in the thermal storage tank 2 directly to the cold water use equipment 6 after ice making, and utilizes cold energy, water in the thermal storage tank 2 is exchanged with an external heat exchanger. In this external heat exchanger, heat exchange between cold water and another fluid may be achieved.

DESCRIPTION OF SYMBOLS 1 Ice thermal storage apparatus 2 Thermal storage tank 3 Heat exchanger 4 Refrigeration apparatus 5 Air supply means 6 Cold water use equipment 8 Plate material 9 Expansion part 10 Non-expansion part 11 Welding part 12 Portion (refrigerant inlet, refrigerant outlet)
13 Refrigerant flow path 15 Blower

Claims (2)

Is divided the plate surface in the bulging part and the non-protruding portion by welding overlapping sheet together was is made in at least the plate surface, refrigerant flow is bulging deformation in a direction away between plate in the bulging portion Although Ru road is formed Tei, at least a portion of the refrigerant passage, a heat exchanger refrigerant flow path is partitioned into a plurality of areas in the width direction thereof,
A heat storage tank that stores the heat exchanger and stores water, and is capable of storing cold heat by making ice on the outer surface of the heat exchanger by the refrigerant passed through the refrigerant flow path of the heat exchanger,
The bulging portion and the non-bulging portion are each formed as a region surrounded by a welded portion,
The heat exchanger is
The overlapped plate members are welded to the plate surface on the inner side of the outer peripheral portion of the plate member while being welded to the plate surface on the inner periphery of the outer peripheral portion of the plate member. And the non-bulged portion,
In at least a portion of the bulging portion, the is width direction is the partition is welded into a plurality of regions, in Rukoto each partitioned region is bulged deformation, the refrigerant flow path of the plurality of the width direction It is partitioned into regions,
A refrigerant inlet and a refrigerant outlet for the refrigerant flow path are provided on the plate surface of the plate material,
In the heat exchanger standing in the heat storage tank, the refrigerant flow path is formed from above to below while meandering from side to side,
The refrigerant flow path is formed in a shape in which linear portions along the left-right direction are spaced apart from each other at equal intervals, and linear portions adjacent in the vertical direction are alternately connected to each other by a semicircular portion. Has been
In this refrigerant flow path, one upper end portion is used as a refrigerant inlet, and the other lower end portion is a refrigerant outlet. The said plate materials are welded so that it may partition. The ice thermal storage apparatus characterized by the above-mentioned. The heat storage tank is provided with a plurality of the heat exchangers,
The ice heat storage device according to claim 1, wherein the heat exchangers that face each other and are adjacent to each other are arranged by shifting a portion extending in a left-right direction in the refrigerant flow path up and down.

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