JP5857762B2 - 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 the following Patent Document 1, an injection pipe (41) made of a circular pipe is installed directly below a plate-shaped heat exchanger (ice-making heat storage plate 21) in parallel with the lower end side thereof. ) Is formed with an air outlet toward the lower side. An ice heat storage device that blows air from the blower (43) into the water from the injection pipe (41) during ice making and cold water intake is provided. It is disclosed.

  Patent Document 2 below discloses a so-called internal-melting type ice heat storage device that makes ice on the outer surface of a coil (35) through which a refrigerant is passed and uses the refrigerant through the coil (35) when taking out the cold heat. It is disclosed. In this device, an annular gap (water column 91) is formed between the outer peripheral surface of the tube constituting the coil (35) and the ice (100) at the time of taking out the cold heat. It is a configuration that promotes ice.

Japanese Patent No. 3498171 (paragraph numbers 0028, 0031, 0035-0036, FIG. 1-4) Japanese Patent No. 3790207 (paragraph numbers 0032-0038, FIG. 3-5)

  In the invention described in Patent Document 1, the injection pipe (41) is a circular pipe. In this case, when the blower (43) is stopped, water flows backward in the injection pipe (41), dirt stays in the pipe, or the air outlet is clogged.

  The injection pipe (41) also serves as a member that supports the heat exchanger (21), and is installed directly below the heat exchanger (21). In this case, since the heat exchanger (21) and the ice adhering to it are arranged directly above the injection pipe (41), the air bubbles are floated and the water is agitated at the time of ice making or deicing. It cannot be done smoothly.

  Further, as described above, dirt adheres to the inside of the injection pipe (41). However, the injection pipe (41) is arranged directly below the heat exchanger (21) and is a support member of the heat exchanger (21). Because it is, it cannot be removed and cleaned.

  On the other hand, the invention described in Patent Document 2 is an internal fusion type device that draws cold heat by flowing a refrigerant through the coil (35) after ice making. Air is supplied to the gap between the coil (35) and ice (100). In order to eject the air, it is necessary to eject air from directly below the coil (35).

  Also in this case, the support member (93) in which the air supply hole (98) is opened also serves as a support member for the coil (35), and the air reservoir member (support member (93)) is removed to remove the air reservoir. The member and its lower part (the bottom part in the heat storage tank) cannot be washed.

  The problem to be solved by the present invention is to prevent dirt from staying in the air reservoir member, and to perform effective bubbling at the time of ice making and ice melting in an external melting type ice heat storage device, and preferably The object is to provide an ice heat storage device capable of attaching and detaching the air ejection structure.

The present invention has been made to solve the above problems, and the invention according to claim 1 is directed to a plate-shaped heat exchanger in which a refrigerant flow path is formed and a plurality of the heat exchangers spaced from each other. And a heat storage tank that stores water and stores water, and can make ice on the outer surface of the heat exchanger by the refrigerant passed through the refrigerant flow path of the heat exchanger and store cold heat, and the adjacent heat An air reservoir member formed at a lower end of a gap between the exchangers in parallel with the heat exchanger and formed from a member opening downward and having air ejection holes formed at set intervals in the longitudinal direction; and An air supply means for sending air into the air reservoir member, wherein the air reservoir member is detachable from the heat storage tank, and the heat exchanger group is composed of the plurality of heat exchangers arranged facing the front and rear. One end of the air reservoir member at one end in the left-right direction. The first support member to be held is provided along the front-rear direction, and the second support member that holds the other end portion of the air reservoir member is provided along the front-rear direction at the other end portion in the left-right direction. Each heat exchanger is provided on each of the support members so as to be bridged between the first support member and the second support member, and the air reservoir member has a pipe provided at one end thereof. While being placed on the first support material, the holding piece provided at the other end is placed on the second support material, and is detachably fitted between the first support material and the second support material. The ice heat storage device is attached, and air from the air supply means is supplied into the air reservoir member through the pipe .

  According to the first aspect of the present invention, since the air reservoir member is formed from a member opened downward, it is possible to prevent dirt from staying in the air reservoir member. Moreover, since the air reservoir member is disposed not at the bottom of the heat exchanger but at the lower end of the gap between the adjacent heat exchangers, the air reservoir member is disposed between the plate heat exchangers or on the outer surface of the plate heat exchanger. Effective bubbling can be performed by smoothly ejecting air into the gap between the adhering ice.

According to the first aspect of the present invention, since the air reservoir member can be detached from the heat storage tank, the air reservoir member can be removed by removing the air reservoir member, and the bottom of the heat storage tank from which the air reservoir member has been removed. Can also be washed. Moreover, since the air reservoir member is disposed not at the bottom of the heat exchanger but at the lower end of the gap between the adjacent heat exchangers, the air reservoir member can be easily attached and detached.

  According to the present invention, it is possible to prevent dirt from staying in the air reservoir member, and to perform effective bubbling at the time of ice making and ice melting in an external melting type ice heat storage device. Moreover, it can also be made washable by attaching and detaching the air ejection structure part.

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 state in the air supply to the stored water from the heat storage tank inner bottom part of the ice thermal storage apparatus of FIG.

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 according to 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.

  FIG. 5 is a schematic longitudinal sectional view showing a state in which air is being supplied from the bottom in the heat storage tank 2 to the stored water. As shown in this figure, 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 after the ice making, the cold water in the heat storage tank 2 is used in the cold water use facility 6. At this time, it is preferable that the air supply means 5 is operated to stir the water in the heat storage tank 2. 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 in a uniform amount from any of the ejection holes 17 via the air reservoir member 16, and the heat storage tank 2 is increased by the rise of the bubbles. Convection of the water inside can be achieved.

  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 (inside the left-right direction of the heat storage tank 2). 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 (the end on the inner side in the left-right direction of the heat storage tank 2), while the other end (the end on the outer side 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 central portion 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.

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.
In particular, if the air reservoir member 16 is formed of a member that opens downward and the air ejection holes 17 are formed in the longitudinal direction at set intervals, the configuration can be changed as appropriate. For example, 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. Moreover, the attachment / detachment structure of the air reservoir member 16 with respect to the thermal storage tank 2 can also be changed suitably.

  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 heat storage apparatus 2 Heat storage tank 3 Heat exchanger 4 Refrigeration apparatus 5 Air supply means 6 Chilled water use equipment 13 Refrigerant flow path 15 Blower 16 Air storage member 17 Ejection hole 30 Work space

Claims (1)

A plate-shaped heat exchanger in which a refrigerant channel is formed;
A plurality of the heat exchangers are arranged facing each other at an interval and store water, and ice is made on the outer surface of the heat exchanger by the refrigerant passed through the refrigerant flow path of the heat exchanger to store cold heat. Possible heat storage tanks,
An air reservoir which is formed at a lower end portion of a gap between the adjacent heat exchangers in parallel with the heat exchanger and formed from a member opening downward and having air ejection holes formed at set intervals in the longitudinal direction. Members,
An air supply means for sending air into the air reservoir member ;
The air reservoir member is detachable from the heat storage tank ,
A first support member that holds one end of the air reservoir member in the front-rear direction is provided at one end in the left-right direction at the lower end of the heat exchanger group composed of the plurality of heat exchangers arranged facing the front and rear. The second support member that holds the other end portion of the air reservoir member is provided along the front-rear direction on the other end portion in the left-right direction.
Each of the heat exchangers is provided on each of the support members so as to be bridged between the first support member and the second support member.
The air reservoir member has a pipe provided at one end portion placed on the first support member, while a holding piece provided at the other end portion is placed on the second support member, Removably fitted between and attached to the second support material,
An ice heat storage device , wherein air from the air supply means is supplied into the air reservoir member via the pipe .

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