JP2008157482A - Heat storage tank and heat storage air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat storage tank, and a heat storage air conditioning system using the heat storage tank, capable of reducing accumulation of a heat carrying medium with a simple structure. <P>SOLUTION: In this heat storage tank 1 comprising a plurality of tanks 10-13 constituting a flow channel for the heat carrying medium, the plurality of tanks 10-13 are formed into the bag shape, and arranged in a state of being nested inside one another, the tanks 10-12 excluding the outermost tank 13, among the plurality of tanks 10-13 is made of a flexible material. The plurality of tanks 10-12 are respectively provided with outflow ports 10c-12c for allowing the heat carrying medium to successively flow out to the next tanks 11-13 adjacent thereto, from the tanks 10-12. Further, the outflow ports 10c-12c of each of the tanks and the outflow ports 10c-12c of the next tank adjacent thereto are disposed on positions opposed to each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat storage tank and a heat storage air conditioning system, and more particularly, to a heat storage tank including a plurality of tanks constituting a flow path of a heat transfer medium and a heat storage air conditioning system using the heat storage tank.

  2. Description of the Related Art Conventionally, a heat storage air conditioning system using a heat storage tank has been proposed in order to perform air conditioning on various spaces such as ordinary houses and offices. In such a heat storage air conditioning system, a heat transfer medium such as water cooled or heated by a heat source device is introduced into a heat storage tank at a low load to store heat, and the stored cold or warm heat is heated at a high load. It is taken out through the carrier medium and used.

  In order to increase the heat storage efficiency in such a heat storage tank, it is necessary to circulate the heat transfer medium without stagnation inside the heat storage tank. Therefore, it is possible to eliminate the stay area (dead water area) of the heat transfer medium. preferable. Moreover, in order to increase the heat storage efficiency, it is necessary to have a sufficient temperature difference between the heat transfer medium at the entrance and exit of the heat storage tank, so a short circuit of the heat transfer medium introduced into the heat storage tank (short circuit) It is preferable to prevent as much as possible.

  For this reason, conventionally, a heat storage tank configured by connecting a plurality of tanks in series with each other has been proposed. For example, when the underground space is used as a heat storage tank, the tanks partitioned by the foundation beam are connected in series with a communication pipe, and the heat transfer medium is sequentially communicated with each tank. In a tank-type heat storage tank, a plurality of tanks are formed inside the heat storage tank by partitioning the inside of the heat storage tank with a plurality of partition plates (for example, see FIG. 1 of Patent Document 1), or extreme By using a tank with a large aspect ratio, it was difficult to produce a dead water area.

JP-A-8-296874

  However, in order to partition a tank-type heat storage tank with a plurality of partition plates in this way, it is necessary to fix a large number of partition plates inside the heat storage tank by means such as welding, which reduces the construction cost of the heat storage tank. It contributed to the increase. In addition, when a tank having an extremely large aspect ratio is used, the installation space is restricted, which is a cause of reducing workability.

  The present invention has been made to solve the above-described problems of the prior art, and provides a heat storage tank and a heat storage air-conditioning system that can reduce short circuits and stagnation of a heat transfer medium with a simple structure. Objective.

  In order to solve the above-described problems and achieve the object, the present invention according to claim 1 is a heat storage tank including a plurality of tanks constituting a flow path of a heat transfer medium, wherein the plurality of tanks are Each of the plurality of tanks is formed of a flexible material, and each of the plurality of tanks is formed of a flexible material. Forming an outlet for allowing the transport medium to flow out from each tank to the next tank adjacent to the tank; and the outlet of the tank and the flow of the next tank adjacent to the tank. The outlets are arranged at positions facing each other.

  According to a second aspect of the present invention, in the first aspect of the present invention, a spacer for maintaining a mutual interval between the plurality of tanks is disposed in at least one internal space of the plurality of tanks. It is characterized by that.

  According to a third aspect of the present invention, in the present invention according to the second aspect, the spacer is integrally projected on at least one tank wall of the plurality of tanks.

  Moreover, the present invention according to claim 4 is the present invention according to any one of claims 1 to 3, wherein a latent heat storage material is disposed in at least one internal space of the plurality of tanks. And

  Moreover, the present invention described in claim 5 is the present invention described in claim 4, wherein a plurality of space portions are provided in the tank wall of the tank, and the latent heat storage material is enclosed in the plurality of space portions. Features.

  Moreover, the present invention described in claim 6 is characterized in that, in the present invention described in claims 2 and 5, the spacer is formed in the space portion in which the latent heat storage material is enclosed.

  Moreover, this invention of Claim 7 is any one of Claim 1 to 6 as said heat storage tank in the heat storage air-conditioning system which connected the heat source, the air conditioner, and the heat storage tank so that a heat | fever conveyance medium could distribute | circulate. The heat storage tank according to claim 1 is used.

  According to the heat storage tank of the present invention according to claim 1, since the heat transfer medium can be sequentially circulated with respect to the plurality of tanks provided in the heat storage tank, a short circuit of the heat transfer medium introduced into the heat storage tank. Circuits can be prevented. In addition, the heat transfer medium introduced into each tank through the outlet is introduced into the next tank through the next outlet through the inside of the tank. Therefore, the heat transfer medium can be circulated without any occurrence, and the generation of the dead water region can be reduced or prevented.

  Further, according to the heat storage tank of the present invention according to claim 2, the flow path of water in the internal space of each tank can be maintained in a desired shape via the spacer, and the generation of a dead water region can be prevented. .

  Further, according to the heat storage tank of the present invention according to claim 3, the spacer can be installed simply by arranging each tank by integrally projecting the spacer on at least one tank wall of the plurality of tanks. Since the trouble of individually arranging the spacers can be saved, the heat storage tank can be formed more easily.

  Moreover, according to the heat storage tank of this invention which concerns on Claim 4, the cold heat of the cold water introduced into the heat storage tank or the warm temperature of warm water can be stored in a latent heat storage material, and the heat storage density can be improved. In particular, since the latent heat storage material has a large `` apparent specific heat '' including heat transfer by solidification / melting at an operating temperature near the melting point, the heat storage capacity with respect to volume is large, and by making the heat storage material a latent heat storage material, The heat storage density can be improved.

  Moreover, according to the heat storage tank of this invention which concerns on Claim 5, each tank can be integrated with a latent heat storage material, and a latent heat storage material can be automatically arrange | positioned by incorporating each tank. Therefore, since the labor of arranging the latent heat storage material independently can be omitted, the assembly of the heat storage tank using the latent heat storage material can be further simplified.

  Further, according to the heat storage tank of the present invention according to claim 6, since the spacer is also used by the space portion in which the latent heat storage material is enclosed, the labor of arranging the spacer and the latent heat storage material independently can be omitted. And the assembly of the heat storage tank using the latent heat storage material can be further simplified.

  According to the heat storage air conditioning system of the present invention according to claim 7, in the heat storage air conditioning system for storing heat in the heat storage tank via the heat transfer medium, the heat transfer medium is sequentially applied to the plurality of tanks provided in the heat storage tank. Since it can be made to circulate, the effect similar to the said invention based on Claims 1-6 can be acquired.

  Embodiments of a heat storage tank and a heat storage air conditioning system according to the present invention will be described below in detail with reference to the accompanying drawings. First, [I] the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] finally, a modification to each embodiment was explained. To do. However, the present invention is not limited by these embodiments.

[I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The heat storage air conditioning system according to each embodiment relates to a system for performing air conditioning on various spaces (hereinafter referred to as air conditioning target spaces) to be air-conditioned such as general houses and offices. Here, the air-conditioning target space includes a plurality of regions or an open or semi-open region without a clear partition in addition to a space partitioned as one region.

  The specific configuration of the heat storage air-conditioning system is arbitrary except for the configuration specifically described with respect to the heat storage tank. For example, an air conditioner that sends a gas with adjusted temperature and humidity to the air-conditioning target space, a heat source device that processes a heat load, heat A circulation line for circulating the carrier medium and a heat storage tank for storing heat are provided. The air conditioner, the heat storage tank, and the heat source device are sequentially connected through a circulation pipe, and heat exchange is possible by circulating the heat transfer medium through the circulation pipe. However, the heat transfer medium is introduced into the heat storage tank through a bypass pipe branched from the circulation pipe, not limited to the one directly connecting the circulation pipe connecting the air conditioner and the heat source device to the heat storage tank. In addition, a heat storage air conditioning system can be configured.

  Here, the specific configuration of the air conditioner is arbitrary, and may include an outside air conditioner for outside air treatment in addition to an air conditioner for circulation treatment. The specific configuration of the heat source device is also arbitrary, and may include incidental facilities such as a cooling tower as necessary in addition to the refrigerator. Moreover, although a heat conveyance medium may contain water, a brine, a refrigerant | coolant, or a hydrate slurry, it demonstrates as what uses water (cold water) in the following description.

  Among the above-described configurations, the heat storage tank is a heat storage unit that introduces a heat transfer medium circulated in a circulation pipe into the heat transfer medium and stores cold or warm heat of the heat transfer medium. As this heat storage tank, the heat storage medium (water) also serves as a heat transfer medium (Embodiments 1 to 5) and the heat storage medium (water, ice, latent heat storage material, etc.) heats between the heat transfer medium. Both the heat storage tanks to be replaced (Embodiments 6 to 10) can be included.

[II] Specific Contents of Each Embodiment Next, specific contents of each embodiment of the heat storage tank according to the present invention will be described.

[Embodiment 1]
First, the first embodiment of the present invention will be described. The first embodiment is a basic form of a heat storage tank in which the heat storage medium also serves as a heat transfer medium.

(Structure of heat storage tank)
First, the structure of the heat storage tank 1 will be described. FIG. 1 is a longitudinal sectional view of a heat storage tank 1 according to the first embodiment, and FIG. 2 is an AA arrow view of the heat storage tank 1 of FIG. The heat storage tank 1 includes a plurality of tanks 10 to 13. The water supply pipe 2 is inserted into the innermost tank 10, and the water intake pipe 3 is inserted into the outermost tank 13. Yes. The water supply pipe 2 and the water intake pipe 3 constitute the above-described circulation pipe, and water heated or cooled by a heat source device (not shown) (or water that has been subjected to heat exchange by an air conditioner (not shown)) is supplied. While being introduced into the heat storage tank 1 through the water pipe 2, the water introduced into the heat storage tank 1 is introduced into the air conditioner or the heat source machine through the intake pipe 3.

  The plurality of tanks 10 to 13 constitute a water flow path, are formed in a bag shape, and are nested in each other. That is, assuming that the portions surrounded by the plurality of tanks 10 to 13 are receiving portions (internal spaces) 10a to 13a, the receiving portion 13a includes the receiving portion 12a, and the receiving portion 12a includes the receiving portion 11a. The receiving portion 11a includes the receiving portion 10a (10a （11a⊂12a⊂13a). However, “inclusion” as used herein means that, among the receiving portions 10a to 13a, a portion that is substantially necessary for constituting a water flow path is included. It is the meaning including the state where the edge part of 10a-13a protrudes on the outer side of other receiving part 10a-13a.

  The open end portions 10b to 12b of the tanks 10 to 12 are drawn upward from the upper surface of the outermost tank 13 and converge around the water pipe 2 at substantially the same position on the plane. ing. Although this convergence method is arbitrary as long as the outflow of water from each tank 10-12 can be prevented, for example, the open end parts 10b-12b of each tank 10-12 are heat-welded with each other, or surface It is wound around the water pipe 2 and fixed by connecting means such as a fastener.

  Of the plurality of tanks 10 to 13, each tank 10 to 12 excluding the outermost tank 13 is formed of a flexible material. Here, the flexible material means a material that can be easily bent and has no water permeability. For example, each of the tanks 10 to 12 can be formed using polyethylene or polypropylene. The outermost tank 13 functions as a housing (tank) of the heat storage tank 1, and is formed of a material that can maintain the desired strength, cold resistance and heat resistance of the heat storage tank 1, for example, FRP, Further, heat insulation can be improved by arranging a heat insulating material outside the tank 13. However, when it is not necessary to make this tank 13 function as a housing of the heat storage tank 1, for example, when the heat storage tank 1 is accommodated inside other protective means as a whole, the tank 13 is also flexible. It can be formed of a material. Moreover, after each tank 10-12 is expanded to the predetermined shape, since it is not always necessary to maintain the flexibility of each tank 10-12, each tank 10-12 is made into a water curable resin (for example, water-absorbing acrylic). Resin), the shape of each of the tanks 10 to 12 may be more stably maintained by being automatically cured by adding water.

  Moreover, the outflow ports 10c-12c are formed in each of the tanks 10-12. The outlets 10c to 12c are openings for allowing water to flow out from the tanks 10 to 12 to the next tanks 11 to 13 adjacent to the tanks 10 to 12, respectively. Specifically, the water introduced into the tank 10 via the water pipe 2 is introduced into the tank 11 via the outlet 10c, introduced into the tank 12 via the outlet 11c, and via the outlet 12c. It is introduced into the tank 13 and finally drained to the outside of the heat storage tank 1 through the intake pipe 3. In particular, due to the difference in water level caused by the introduction of water, a pressure difference occurs between the tanks 10 to 13, and water sequentially circulates in the tanks 10 to 13. Therefore, a short circuit of water introduced into the heat storage tank 1 can be prevented. In addition, the specific structure of each outlet is arbitrary as long as water can be made to flow out with respect to each tank 10-13 only by the desired flow rate per unit time, for example, a short cylindrical hard resin is used for each tank. The outlets 10c to 12c can be configured by being fixed to the 10 to 12 side walls in a penetrating manner.

  Here, the outflow ports 10c to 12c of the respective tanks 10 to 12 and the outflow ports 10c to 12c of the subsequent tanks 10 to 12 adjacent to the respective tanks 10 to 12 are arranged at positions facing each other. Yes. Specifically, the outlet 10c of the tank 10 and the outlet 11c of the next tank 11 adjacent to the tank 10 are arranged at positions facing each other. Similarly, the outflow port 11c and the outflow port 12c are each arrange | positioned in the position which mutually opposes. Furthermore, the water supply pipe 2 and the outlet 10c, and the outlet 12c and the intake pipe 3 are also arranged at positions facing each other. Here, “arranged at opposing positions” intends that the two arranged outlets 10c to 12c (or the water supply pipe 2 and the water intake pipe 3) are arranged as far as possible from each other. The distance between the two outlets 10c to 12c (or the water supply pipe 2 and the water intake pipe 3) is intended to be the largest. According to this structure, the water introduced into each tank 10-12 is introduced into the next tank 11-13 via the next outflow port 10c-12c via the inside of the said tank 10-12. Alternatively, it is taken out through the intake pipe 3. Therefore, water flows through the inside of each tank 10-13, and generation | occurrence | production of a dead water area | region can be reduced or prevented.

  In practice, it is preferable to determine the specific arrangement position of the water supply pipe 2, the outlets 10 c to 12 c, or the intake pipe 3 so that necessary and sufficient heat storage and radiation can be obtained through simulation or the like. Moreover, about the specific internal diameter of the water pipe 2, the outflow ports 10c-12c, or the intake pipe 3, it is preferable to adjust so that the water level difference between each tank 10-13 may become a desired level. In addition, although the example which provided only the water supply pipe 2, the outflow ports 10c-12c, or the intake pipe 3 in each tank 10-13 is shown here, you may provide these two or more. In this case, the plurality of water pipes 2, the plurality of outlets 10 c to 12 c, or the plurality of water intake pipes 3 are connected to any one of the water tanks 2, outlets 10 c to 12 c or the inlets of the tanks 10 to 13 in the next stage. What is necessary is just to arrange | position in the position which is not short-circuited with the water pipe 3. FIG. By carrying out like this, the stay area of the water which flows through the internal space of each tank 10-13 becomes still more difficult to generate | occur | produce.

(Assembly method of heat storage tank 1)
Next, a method for assembling the heat storage tank 1 will be described. The heat storage tank 1 can be assembled at a factory or the like, but can also be easily assembled at an installation site. For example, when assembling at the installation site, the outermost tank 13 and the other tanks 10 to 12 are carried into the site. Here, since each tank 10-12 is formed from the flexible material, it can be handled in the folded compact state. And the tank 12 is put in the inside of the outermost tank 13, the next tank 11 is put in this tank 12, and the next tank 10 is put in the inside of the tank 11 similarly.

  And while fixing the water pipe 2 in the state inserted in the innermost tank 10, it fixes the water intake pipe 3 in the state inserted in the outermost tank 13. FIG. Next, the open end portions 10b to 12b of the tanks 10 to 12 are converged, and the assembling work is completed. Then, by supplying water from the water supply pipe 2, each tank 10-12 is automatically expanded to a predetermined shape by the flexibility by water pressure. Alternatively, the assembling operation can be performed while reducing the dead weight of each of the tanks 10 to 12 by using the buoyancy of water by assembling the tanks 10 to 12 with water filled or with water. According to such an assembling method, it is not necessary to fix a large number of partition plates inside the heat storage tank 1 by welding as in the prior art, so that the construction cost of the heat storage tank 1 can be significantly reduced. Moreover, the heat storage tank 1 can be decomposed | disassembled and the transfer and reuse of the heat storage tank 1 can be performed easily by performing the procedure contrary to the above. In addition, the tanks 10 to 12 except for the outermost layer 13 may be arranged in a nested manner, and then the tanks 10 to 12 may be collectively arranged in the outermost layer 13. .

(Effect of Embodiment 1)
Thus, according to this Embodiment 1, since water can be sequentially circulated with respect to the several tanks 10-13 provided in the thermal storage tank 1, the short circuit of the water introduced into the inside of the thermal storage tank 1 Can be prevented. Moreover, since the water introduced into each tank 10-13 via the water pipe 2 or the outflow ports 10c-12c reaches the next stage via the inside of the tank 10-13, the inside of each tank 10-13 Water can be circulated all over, and generation of dead water areas can be reduced or prevented.

  In particular, since each of the tanks 10 to 12 is made of a flexible material, the tanks 10 to 12 can be easily handled and can be easily assembled at the installation site. Moreover, since the heat storage tank 1 can be installed by assembling a plurality of flexible tanks 10 to 12 in a nested manner, a large number of partition plates are fixed to the inside of the heat storage tank 1 by means such as welding as in the prior art. It becomes unnecessary, and the construction cost of the heat storage tank 1 can be significantly reduced. Moreover, the thermal storage tank 1 can be decomposed | disassembled easily and transfer and reuse of the thermal storage tank 1 can be performed easily. Furthermore, when each tank 10-12 is formed of a water curable resin, each tank 10-12 can be automatically cured by adding water after forming each tank 10-12. Alternatively, the shape of each of the tanks 10 to 12 can be more stably maintained by hardening the tanks 10 to 12 while being molded in water after the water is added to the tanks 10 to 12.

[Embodiment 2]
Next, a second embodiment of the present invention will be described. The second embodiment is a form in which spacers for maintaining the mutual interval between the tanks are arranged. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment except where otherwise specified, and the same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Structure of heat storage tank)
First, the structure of the heat storage tank 20 will be described. FIG. 3 is a longitudinal sectional view of the heat storage tank 202 according to the second embodiment, and FIG. 4 is a sectional view taken along the line BB in FIG. Spacers 21 are provided in the internal spaces of the tanks 11 to 13 of the heat storage tank 20. This spacer 21 is a space | interval maintenance means for maintaining the mutual space | interval of each tank 10-13, for example, is comprised by the shelf shape from the some leg part 21a and the holding | maintenance part 21b.

  The plurality of leg portions 21a are formed in a bar shape, for example, and are erected on the upper surface of the lower portion of the tank wall of each tank 11-13. Moreover, the holding | maintenance part 21b is formed in flat shape, for example, and is supported by each leg part 21a. On the upper surface of the holding part 21b, the tank walls of the tanks 10 to 12 on the upstream side of the tanks 11 to 13 in which the holding part 21b is arranged are held so as to be substantially horizontal. For example, the tank wall of the tank 10 is held substantially horizontally on the upper surface of the holding portion 21b of the spacer 21 arranged inside the tank 11. Here, the total value of the length of the leg portion 21a and the thickness of the holding portion 21b is determined so as to substantially correspond to a desired mutual interval between the tanks 10-13. Accordingly, the tank walls of the tanks 10 to 13 are held in a substantially horizontal shape at positions where a desired mutual interval is maintained by the spacer 21. For this reason, the flow path of the water in each tank 10-13 can be maintained in a desired shape, and generation | occurrence | production of a dead water area | region can be prevented.

(Assembly method of heat storage tank 20)
Next, a method for assembling the heat storage tank 20 will be described. After installing the outermost tank 13, the spacer 21 is arranged inside the tank 13, and then the previous tank 12 is arranged inside the tank 13. Thereafter, similarly, the spacers 21 and the tanks 11 and 10 are alternately arranged. Since other procedures are the same as those in the first embodiment, description thereof is omitted.

(Effect of Embodiment 2)
As described above, according to the second embodiment, in addition to the basic effects similar to those of the first embodiment, the space between the tanks 10 to 13 is maintained by the spacer 21 and the tanks of the tanks 10 to 13 are also maintained. By maintaining the wall in a substantially horizontal shape, the flow path of water inside each of the tanks 10 to 13 can be maintained in a desired shape, and water retention can be prevented.

[Embodiment 3]
Next, a third embodiment of the present invention will be described. In the third embodiment, a spacer having a shape different from that of the second embodiment is used. The configuration of the third embodiment is substantially the same as the configuration of the second embodiment unless otherwise specified, and the same configuration as that of the second embodiment is used in the second embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

  FIG. 5 is a longitudinal sectional view of the heat storage tank 30 according to the third embodiment. Spacers 31 are provided in the internal spaces of the tanks 11 to 13 of the heat storage tank 30. Specifically, the tanks 10 and 11 are formed narrow, and the tanks 12 and 13 are formed wide. The tank 12 includes the tank 11 and extends to the side of the tank 11. Each spacer 31 is formed to be about half the width of the spacer 21 of the second embodiment, and only one spacer 31 is arranged inside the narrow tank 11, and 2 inside the wide tanks 12 and 13. Two spacers are arranged side by side. Thus, by reducing the size of each of the tanks 10 and 11 and the spacer 31 as compared with the second embodiment, the volumes of the receiving portions 10a to 13a inside the heat storage tank 30 can be freely adjusted. In addition, the volume and weight of one spacer 31 can be reduced to make it easier to handle.

(Effect of Embodiment 3)
As described above, according to the third embodiment, in addition to the same effects as those of the second embodiment, the volume of the receiving portions 10a to 13a inside the heat storage tank 30 can be freely adjusted and one spacer can be used. The volume and weight of 31 can be reduced to make it easier to handle.

[Embodiment 4]
Next, a fourth embodiment of the present invention will be described. In the fourth embodiment, a spacer having a different shape from that of the second embodiment is used. The configuration of the fourth embodiment is substantially the same as the configuration of the second embodiment except where otherwise specified, and the configuration substantially the same as the configuration of the second embodiment is used in the second embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

  FIG. 6 is a longitudinal sectional view of the heat storage tank 40 according to the fourth embodiment, and FIG. 7 is a sectional view taken along the line CC in FIG. A spacer 41 is provided in the internal space of the heat storage tank 40. Specifically, a plurality of spacers 41 are juxtaposed at intervals inside each of the tanks 11 to 13. Each spacer 41 is formed in a substantially I-shape as a whole from a pair of upper and lower flat plate-shaped holding portions 41a and leg portions 41b erected between the holding portions 41a. Each spacer 41 is formed to be narrower than the spacer 31 of the third embodiment, and more spacers 41 can be arranged in parallel. In this way, by separately arranging the spacers 41 in the tanks 11 to 13, the water fluidity in the tanks 11 to 13 can be further increased, and the volume and weight of one spacer 41 can be increased. It can be reduced and the handling can be made easier.

(Effect of Embodiment 4)
As described above, according to the fourth embodiment, in addition to the same effects as those of the second embodiment, the spacers 41 in the respective tanks 11 to 13 are divided and arranged so that the water in the respective tanks 11 to 13 can be obtained. The fluidity of the spacer can be further increased, and the volume and weight of one spacer 41 can be reduced to facilitate the handling thereof.

[Embodiment 5]
Next, a fifth embodiment of the present invention will be described. In the fifth embodiment, a spacer is provided integrally with each tank. Note that the configuration of the fifth embodiment is substantially the same as the configuration of the second embodiment unless otherwise specified, and the configuration substantially the same as the configuration of the second embodiment is used in the second embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

  FIG. 8 is a longitudinal cross-sectional view of the heat storage tank 50 according to the fifth embodiment, and FIG. 9 is a perspective view of a main part of the tank wall of each tank. Spacers 51 are provided in the internal spaces of the tanks 10 to 13 of the heat storage tank 50. Specifically, a plurality of spacers 51 are integrally fixed to the tank walls of the tanks 10 to 13 at intervals. Each spacer 51 is formed in an elongated rod shape, and is fixed so as to protrude downward on the lower surface of the tank wall of each tank 10-13. Although the concrete formation method and raw material of this spacer 51 are arbitrary, the resin-made spacer 51 can be welded and fixed to the tank wall of each tank 10-13, for example. Thus, when the spacer 51 is integrated in each tank 10-13, it becomes unnecessary to handle the spacer 51 independently, and also when each heat storage tank 50 is assembled, each tank 10-13 is inserted sequentially. Thus, the spacer 51 can be automatically arranged.

(Effect of Embodiment 5)
As described above, according to the fifth embodiment, in addition to the same effects as those of the second embodiment, by integrating the spacers 51 into the tanks 10 to 13, it is not necessary to handle the spacers 51 independently. The heat storage tank 50 can be assembled more easily.

[Embodiment 6]
Next, a sixth embodiment of the present invention will be described. The sixth embodiment is a basic form of a heat storage tank in which the heat storage medium exchanges heat with the heat transfer medium. The configuration of the sixth embodiment is substantially the same as the configuration of the first embodiment except where otherwise specified, and the same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals and / or names are attached as necessary, and the description thereof is omitted.

(Structure of heat storage tank)
First, the structure of the heat storage tank 60 will be described. FIG. 10 is a longitudinal sectional view of the heat storage tank 60 according to the sixth embodiment. A latent heat storage material (PCM) 61 is disposed in the internal space of each of the tanks 10 to 13 of the heat storage tank 60. The water introduced into each of the tanks 10 to 13 performs heat exchange between the latent heat storage materials 61 by circulating around the latent heat storage materials 61. Thus, the cold heat or the warm water temperature of the cold water introduced into the heat storage tank 60 can be stored in the latent heat storage material 61, and the heat storage density can be improved. In particular, by using the latent heat storage material 61, the apparent specific heat is increased by using the latent heat accompanying the phase change, and the heat storage density is further improved.

  The specific arrangement structure of the latent heat storage material 61 is arbitrary, but here, the latent heat storage material 61 is accommodated inside each tank in a state of being filled in a plurality of hollow spherical (capsule-shaped) small containers 61a. Has been. The specific material of the small container 61a is arbitrary, but is preferably a material having a high thermal conductivity and a large surface area per unit volume. For example, metal (aluminum, stainless steel, etc.) can be used. In addition, in order to increase the thermal conductivity of the latent heat storage material 61, the small container 61a may be thinned or a heat transfer fin may be attached to the outer surface thereof. However, this is not the case when the heat transfer rate does not have to be large in the heat storage and heat dissipation plan. Moreover, regarding the arrangement density (arrangement number) of the latent heat storage materials 61, it is preferable to set the density so as not to prevent the circulation of water. Actually, it is preferable to determine the structure and arrangement density of the latent heat storage material 61 so that necessary and sufficient heat transfer speed and circulation speed can be obtained through simulation or the like. In this way, filling the latent heat storage material 61 into the small container 61a facilitates its handling, increases the contact area with the heat transfer medium per unit volume, and promotes its solidification or melting. it can.

  Thus, when using the latent heat storage material 61, the temperature of water is set so that the latent heat storage material 61 may change phase. For example, in the case where cold water is introduced into the heat storage tank 60 to store cold heat, when the freezing point of the latent heat storage material 61 is 10 ° C. and the melting point is 13 ° C., when storing cold, water of about 5 ° C. is introduced and allowed to cool. When doing so, add water at about 18 ° C.

(Assembly method of heat storage tank 60)
Next, a method for assembling the heat storage tank 60 will be described. After installing the outermost tank 13, the latent heat storage material 61 is arranged inside the tank 13, and then the previous stage tank 12 is arranged inside the tank 13. Thereafter, similarly, the latent heat storage material 61 and the tanks 11 and 10 are alternately arranged. Since other procedures are the same as those in the first embodiment, description thereof is omitted.

(Effect of Embodiment 6)
As described above, according to the sixth embodiment, in addition to the basic effects similar to those of the first embodiment, the cold heat or the warm water temperature of the cold water introduced into the heat storage tank 60 can be stored in the latent heat storage material 61 to store the heat. The density can be improved. In particular, by using the latent heat storage material 61, the apparent specific heat is increased by using the latent heat accompanying the phase change, and the heat storage density is further improved. Moreover, by filling the small-sized container 61a with the latent heat storage material 61, the handling becomes easy, the contact area with the heat transfer medium per unit volume can be increased, and the solidification or melting can be promoted.

[Embodiment 7]
Next, a seventh embodiment of the present invention will be described. In the seventh embodiment, both the latent heat storage material and the spacer are arranged inside each tank. The configuration of the seventh embodiment is substantially the same as the configuration of the second embodiment or the sixth embodiment unless otherwise specified, and is substantially the same as the configuration of the second embodiment or the sixth embodiment. The same reference numerals and / or names as those used in the second embodiment or the sixth embodiment are attached as necessary, and the description thereof is omitted.

(Structure of heat storage tank)
First, the structure of the heat storage tank 70 will be described. FIG. 11 is a longitudinal sectional view of a heat storage tank 70 according to the sixth embodiment. A spacer 21 and a latent heat storage material 61 are disposed in the internal space of each of the tanks 10 to 13 of the heat storage tank 70. Here, the spacer 21 is formed in the same manner as in the second embodiment, and the latent heat storage material 61 is accommodated in the small container 61a as in the fifth embodiment. However, the small container 61a is formed in a hollow cylindrical shape instead of a hollow spherical shape. And the tank wall of each tank 10-13 is horizontally hold | maintained on the upper surface of the spacer 21, and the latent heat storage material 61 is mounted on the upper surface of this tank wall. However, in addition to this, the latent heat storage material 61 may be suspended from the spacer 21.

(Assembly method of heat storage tank 70)
Next, a method for assembling the heat storage tank 70 will be described. After installing the outermost tank 13, the latent heat storage material 61 and the spacer 21 are sequentially arranged inside the tank 13, and then the next tank 12 is arranged inside the tank 13. Thereafter, similarly, after the latent heat storage material 61 and the spacer 21 are arranged, the tanks 11 and 10 are arranged. Since other procedures are the same as those in the second embodiment or the sixth embodiment, description thereof is omitted.

(Effect of Embodiment 7)
Thus, according to the seventh embodiment, the same effects as those of the second and sixth embodiments can be obtained at the same time.

[Embodiment 8]
Next, an eighth embodiment of the present invention will be described. In this eighth embodiment, both the latent heat storage material and the spacer are arranged inside each tank. The configuration of the eighth embodiment is substantially the same as the configuration of the third or seventh embodiment, unless otherwise specified, and the configuration that is substantially the same as the configuration of the third or seventh embodiment. Are denoted by the same reference numerals and / or names as used in the third embodiment or the seventh embodiment as necessary, and the description thereof is omitted.

  FIG. 12 is a longitudinal sectional view of a heat storage tank 80 according to the eighth embodiment. Each tank and the spacer 21 of the heat storage tank 80 are configured in the same manner as in the third embodiment, and a latent heat storage material 61 configured in the same manner as in the seventh embodiment is disposed on the upper surface of the spacer 21.

(Effect of Embodiment 8)
Thus, according to the eighth embodiment, the same effects as those of the third and seventh embodiments can be obtained at the same time.

[Embodiment 9]
Next, a ninth embodiment of the present invention will be described. In the ninth embodiment, a plurality of space portions are provided on the tank wall of each tank, and a latent heat storage material is enclosed in the plurality of space portions. The configuration of the ninth embodiment is substantially the same as the configurations of the first and sixth embodiments, unless otherwise specified, and is substantially the same as the configurations of the first and sixth embodiments. Are denoted by the same reference numerals and / or names as used in the first and sixth embodiments as necessary, and the description thereof is omitted.

(Structure of heat storage tank)
First, the structure of the heat storage tank 90 will be described. FIG. 13 is a longitudinal sectional view of a heat storage tank 90 according to the ninth embodiment, and FIG. 14 is a perspective view of a main part of the tank wall of each tank of FIG. A plurality of spaces 91 are formed in the tank walls of the tanks 10 to 12 of the heat storage tank 90, and a latent heat storage material 61 is sealed in each space 91. As a specific manufacturing method of each of the tanks 10 to 12, for example, a first sheet having a plurality of recesses is prepared, and the first sheet is filled with the latent heat storage material 61 in the recesses of the first sheet. Each of the tanks 10 to 12 is manufactured by superimposing a flat plate-like second sheet on the surface of the latent heat storage material 61 and welding the first sheet and the second sheet to each other. can do.

(Assembly method of heat storage tank 90)
Next, a method for assembling the heat storage tank 90 will be described. Basically, the heat storage tank 90 can be assembled in the same procedure as in the first embodiment. Here, since the latent heat storage material 61 is integrated in each tank 10-12, the latent heat storage material 61 can be automatically arrange | positioned by incorporating each tank 10-12, and the latent heat storage material 61 is made independent. Since the time and effort for arranging the heat storage tank 90 can be omitted, the assembly of the heat storage tank 90 using the latent heat storage material 61 can be further simplified.

(Effect of Embodiment 9)
As described above, according to the ninth embodiment, the same effects as those of the first and sixth embodiments can be obtained at the same time. Furthermore, since the labor of arranging the latent heat storage material 61 independently can be omitted, the assembly of the heat storage tank 90 using the latent heat storage material 61 can be further simplified.

[Embodiment 10]
Finally, Embodiment 10 of the present invention will be described. In the tenth embodiment, the latent heat storage material also serves as a spacer. The configuration of the tenth embodiment is substantially the same as the configurations of the fifth and ninth embodiments except where otherwise specified, and is substantially the same as the configurations of the fifth and ninth embodiments. Are denoted by the same reference numerals and / or names as used in the fifth and ninth embodiments as necessary, and the description thereof is omitted.

  FIG. 15 is a longitudinal sectional view of the heat storage tank 100 according to the tenth embodiment. A plurality of spaces 101 are formed in the tank walls of the tanks 11 to 12 of the heat storage tank 100, and the latent heat storage material 61 is sealed in each space 101. Here, the length of each space portion 101 in the vertical direction is formed to be longer than that of the ninth embodiment, and the desired mutual spacing between the tanks 11 to 12 is the same as that of the spacer 21 of the fifth embodiment. Is determined so as to substantially correspond to Therefore, the tank walls of the tanks 11 to 12 are held in a substantially horizontal shape at positions where a desired mutual interval is maintained by the space portion 101. That is, each space part 101 and the latent heat storage material 61 function similarly to the spacer 21 of Embodiment 5.

(Effect of Embodiment 10)
Thus, according to the tenth embodiment, the same effects as those of the fifth and ninth embodiments can be obtained at the same time. Furthermore, since the space portion 101 enclosing the latent heat storage material 61 also serves as a spacer, it is possible to eliminate the trouble of arranging the spacers independently, and the assembly of the heat storage tank 100 using the spacer and the latent heat storage material 61 is further simplified. it can.

[III] Modifications to Each Embodiment While the embodiments of the present invention have been described above, the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. It can be arbitrarily modified and improved within. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
In addition, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved.

(About the use of multiple types of heat storage materials)
In the sixth to tenth embodiments, the latent heat storage material 61 has been described as being used. However, a plurality of types of latent heat storage materials 61 having different freezing points and melting points (or heat storage materials formed by mixing them) may be used. Good. In this case, efficient heat storage can be performed on the heat transfer medium having various temperatures.

(Regarding the direction of flow of the heat transfer medium)
In each of the above embodiments, the heat transfer medium has been described as flowing in the direction from the innermost tank to the outermost tank, but it is allowed to flow in the direction from the outermost tank to the innermost tank. May be. In this case, the water supply pipe is inserted into the outermost tank and the water intake pipe is inserted into the innermost tank.

  The present invention can be used for a tank-type heat storage tank and a heat storage air-conditioning system using the heat storage tank, and is particularly useful for increasing the heat storage efficiency by preventing the occurrence of a stagnant region of the heat transfer medium or a short circuit.

It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 1 of this invention. It is an AA arrow line view of the thermal storage tank of FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 2. FIG. It is a BB arrow sectional drawing of FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 3. FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 4. FIG. It is CC sectional view taken on the line of FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 5. FIG. It is a principal part perspective view of the tank wall of each tank. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 6. FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 7. FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 8. FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 9. FIG. It is a principal part perspective view of the tank wall of each tank of FIG. It is a longitudinal cross-sectional view of the heat storage tank which concerns on Embodiment 10. FIG.

Explanation of symbols

1, 20, 30, 40, 50, 60, 70, 80, 90, 100 Heat storage tank 2 Water supply pipe 3 Water intake pipe 10-12 Tank 10a-13a Receiving part 10b-12b Open end 10c-12c Outlet 21, 31 , 41, 51 Spacer 21a, 41b Leg 21b, 41a Holding part 61 Latent heat storage material 61a Small container 91, 101 Space part

Claims (7)

A heat storage tank provided with a plurality of tanks constituting the flow path of the heat transfer medium,
The plurality of tanks are each formed in a bag shape, and arranged in a nested manner with each other,
Each tank other than the outermost tank among the plurality of tanks is formed from a flexible material,
In each of the plurality of tanks, an outlet for allowing the heat transfer medium to flow out from each tank to the next tank adjacent to the tank is formed.
The outlet of each tank and the outlet of the next tank adjacent to each tank are arranged at positions facing each other,
A heat storage tank characterized by Arranging a spacer for maintaining an interval between the plurality of tanks in at least one internal space of the plurality of tanks;
The heat storage tank according to claim 1. The spacer projecting integrally on at least one tank wall of the plurality of tanks;
The heat storage tank according to claim 2. Arranging a latent heat storage material in at least one internal space of the plurality of tanks,
The heat storage tank according to any one of claims 1 to 3, wherein: Providing a plurality of spaces in the tank wall of the tank, and enclosing the latent heat storage material in the plurality of spaces;
The heat storage tank according to claim 4. Forming the spacer in the space enclosing the latent heat storage material;
The heat storage tank according to claim 2 or 5 characterized by these. In a heat storage air-conditioning system in which a heat transfer medium is connected to be able to circulate a heat source, an air conditioner, and a heat storage tank,
Using the heat storage tank according to any one of claims 1 to 6 as the heat storage tank,
Thermal storage air conditioning system characterized by

Images