JP2011002195A - Heat exchanger and ice storage type air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanger improving durability and heat exchange efficiency and improving ease of work execution.SOLUTION: The heat exchanger includes flexible tubular bodies 120, a pair of collecting parts 130 bringing the tubular bodies into communication with each other at both ends of the many tubular bodies 120 arranged, an inlet opening 144 and a discharge opening 146 provided in the collecting part 130 for heat medium. The heat medium flows into the collecting part 130 from the inlet opening 144, flows from the collecting part 130 into the other collecting part 130 through the tubular bodies 120 and is then discharged from the discharge opening 145.

Description

  The present invention relates to a heat exchanger used for storing cold energy in a heat storage tank, and an ice heat storage type air conditioning system using the heat exchanger.

  In recent years, as an energy saving measure, a regenerative air conditioning system that can use inexpensive nighttime electric power has been provided. In particular, an ice storage type air conditioning system that produces ice at night and cools the ice while melting it is not only cheaper at night, but also has a lower temperature, saving energy than a normal air conditioner. It is attracting attention as a highly effective power operation.

  Ice heat storage air conditioning systems are broadly divided into static and dynamic types. The static type is a system in which a coiled heat exchanger is arranged in a heat storage tank that stores water or the like, and ice making and ice melting are repeated in the heat storage tank via the heat exchanger. On the other hand, the dynamic type is a system in which the heat storage tank and the ice making unit are separated and ice flows in the apparatus.

  Patent Document 1 and Patent Document 2 disclose techniques related to a static ice heat storage air conditioning system. Patent Document 1 describes a technique for performing heat exchange by disposing a galvanized copper heat transfer tube as a heat exchanger in a heat storage tank. On the other hand, Patent Document 2 discloses a heat exchanger for a heat storage tank that is composed of a three-layer composite tube having an aluminum tube as a core and thermoplastic resin tubes inside and outside.

  As shown in Patent Document 1 and Patent Document 2, the conventional ice heat storage type heat exchanger (cooling coil) is a metal refrigerant pipe. One of the reasons is that a metal having higher rigidity than the resin is considered suitable because the grown ice presses the pipe, and this is because a certain thickness is required. Another reason is that, in order to smoothly transmit the cold heat of the refrigerant (heat medium), it is considered that a metal having a significantly higher heat transfer efficiency is suitable as a material than a resin.

JP 2000-144460 A JP 2000-274978 A

  There are various types of heat exchangers as described above. However, heat exchangers are intended to further improve heat exchange efficiency, improve the durability of pipes that generate ice on the surface, and workability. In addition, there is a problem in improving economy.

  However, the heat exchanger described in Patent Document 1 seems to have a relatively high heat exchange efficiency because of the use of a copper heat transfer tube, but a tubular body made of a metal such as a copper heat transfer tube. In general, there is a problem that the manufacturing cost increases. Moreover, even if it is a metal which has rigidity, in order to prevent the refraction | bending and fracture | rupture by the compression of the ice lump which generate | occur | produced on the surface, there exists a restriction | limiting in thinning and refinement | miniaturization of a tubular body. And the heat exchanger manufactured with the metal cannot avoid the increase in weight, and there exists a possibility of the work labor required for conveyance and construction increasing.

  Moreover, the heat exchanger described in Patent Document 2 has sufficient heat resistance and rigidity, is lightweight, and can be used over a wide temperature range. However, since the above heat exchanger is a composite tube composed of three layers, it becomes thick, and it is considered difficult to improve the heat exchange efficiency with this configuration.

  In view of such problems, an object of the present invention is to provide a heat exchanger having improved durability and heat exchange efficiency and improved workability.

  In order to solve the above-described problems, a typical configuration of a heat exchanger according to the present invention includes a flexible tubular body and a pair of collecting portions that communicate with each other at both ends of a plurality of tubular bodies arranged in a line. And a heat medium inlet and outlet provided in the collecting portion, the heat medium flows from the inlet to the collecting portion, and flows from the collecting portion to the other collecting portion through the tubular body. After that, it is discharged from the discharge port.

  According to the above configuration, since the tubular body has flexibility even if ice blocks are generated on the surface, it is possible to prevent the occurrence of refraction and breakage due to the compression of the ice blocks. Further, the water pressure applied to both the collecting portions can be supported by a large number of tubular bodies. Therefore, the tubular body can be thinly and thinly arranged. Thereby, since the surface area is increased in the portion where a large number of tubular bodies are arranged, the heat exchange efficiency is increased. From these things, it becomes possible to provide the heat exchanger which improved durability and heat exchange efficiency, and was lightweight and improved workability.

  The collecting portion is a rectangular box, and the inside of one collecting portion is divided into two inner chambers. The first inner chamber to which the inflow port is connected and the second inner chamber to which the discharge port is connected. And the other collecting portion is connected to all the tubular bodies, and the heat medium flows into the first inner chamber from the inlet and passes through the tubular body communicating with the first inner chamber. After flowing to the gathering section, it may be passed through a tubular body communicating with the second inner chamber to flow to the second inner chamber and discharged from the discharge port.

  According to the said structure, since an inflow port and a discharge port are arrange | positioned at the one side of the said heat exchanger, heat exchange and the installation layout of piping become easy. Moreover, since the path | route of the tubular body which heat-exchanges can be lengthened, the cold energy of a heat medium can be utilized effectively. Thus, versatility and heat exchange efficiency can be further improved.

  The assembly portion may have a joint portion that joins a large number of arranged tubular bodies, and the joint portion may have a collision portion that is not connected to the tubular body at a position facing the inflow port. According to such a configuration, the heat medium flowing in from the inflow port is dispersed by colliding with the collision portion. Therefore, the heat medium can be evenly distributed to all the tubular bodies arranged in the joint portion without being biased toward a part of the tubular bodies facing the inflow port. As a result, the heat exchange efficiency can be further improved.

  When the structure of the inlet and the outlet is the same, if a collision portion is provided at a position facing the outlet, the first inner chamber and the second inner chamber are not distinguished from each other. Since it can connect to the pipe which supplies a medium, the said heat exchanger can be installed simply.

  The tubular body may be arranged in a staggered manner with respect to the gathering portion. By arranging in this way, a large number of tubular bodies can be arranged with a substantially equal spacing between each tubular body and other surrounding tubular bodies. As a result, even if a large number of tubular bodies are arranged, it is possible to effectively transmit cold heat without biasing the generation of ice blocks in part. In addition, the arrangement interval between the centers of each tubular body is 6 mm in the case of an inner melting system (when ice is melted by a heat medium circulating inside), and in the case of an outer melting system (by external heat). In the case of melting ice), it is desirable to take a configuration of 10 mm intervals.

  The tubular body may have a wall thickness of 0.6 mm or less and a diameter of 10 mm or less. By setting the thickness to 0.6 mm or less, heat transfer efficiency can be improved, and flexibility can be exhibited while maintaining an appropriate strength. In addition, by setting the diameter of the tubular body to 10 mm or less, the surface area per unit mass of the heat medium flowing inside the tubular body can be increased, and more tubular bodies can be arranged in an assembly portion having a certain area. . As a result, it is possible to avoid refraction and breakage due to compression of the ice block and further improve the cooling efficiency.

  The heat exchanger may include a reinforcing plate that bundles and supports the tubular bodies between the pair of collecting portions. According to this configuration, even if the tubular body is fine and flexible, durability against twisting can be further improved by supporting the reinforcing plate.

  The tubular body may be joined to the gathering portion by thermal welding. According to the heat welding, the gap between the tubular body and the gathering portion can be reliably sealed, and the other materials can be joined together without using other materials such as adhesives. It does not flow out into the medium and the heat storage tank. Therefore, it becomes possible to suppress contamination in the heat medium and the heat storage layer.

  The gathering part is a rectangular box shape, the gathering part is composed of a box part and a lid part, the gathering part has a packing between the box part and the lid part, and the box part and the lid part are formed by thermal welding. You may make it join.

  According to the said structure, between a box part and a cover part can be sealed by having packing, and the leakage of a heat carrier can be prevented. Further, since the sealing is further performed by joining by heat welding, it is possible to completely prevent the heat medium from leaking and to prevent the cooling function from being lowered.

  The tubular body may be made of polypropylene. Polypropylene is relatively resistant to temperature changes and has very little elution to the outside. In addition, since it is lighter than metal and easy to mold, even a finely shaped tubular body can be easily manufactured and transported. As a result, durability can be improved and manufacturing costs can be kept low.

  The heat medium may be propylene glycol. Propylene glycol is an antifreeze and easy to use because of its low toxicity. Therefore, it can be easily circulated and used as a heat medium.

  The heat exchanger may further include a frame that accommodates a plurality of tubular bodies and a pair of gathering portions, and a transport handle attached to the frame.

  According to the said structure, it can prevent that a direct external load is added to a fine-shaped tubular body by having a flame | frame. Moreover, it becomes easy to carry by attaching a handle, and work efficiency at the time of installation to a heat storage tank etc. improves. As a result, durability and workability can be improved.

  A typical configuration of an ice heat storage type air conditioning system according to the present invention is characterized in that the heat exchanger is accommodated in a heat storage tank. According to this configuration, it is possible to provide an ice heat storage type air conditioning system with extremely high cooling efficiency.

  Other typical configurations of the heat exchanger according to the present invention include a polypropylene tubular body, and a pair of polypropylene box-shaped collecting portions that communicate with each other at both ends of the tubular bodies arranged in a large number. And a heat medium inlet and outlet provided in the gathering portion, and the tubular body is joined to the gathering portion by thermal welding.

  According to the said structure, it can utilize suitably as a heat exchanger for waste heat recovery. That is, by forming the tubular body and the gathering portion from polypropylene, a heat exchanger having excellent heat resistance, corrosion resistance, antifouling properties, and cleanability can be obtained. Further, since it is lighter than metal and easy to mold, even a finely shaped tubular body can be easily manufactured and transported. Furthermore, by forming the tubular body and the gathering portion from the same material and joining them by heat welding, the gap between the tubular body and the gathering portion can be reliably sealed, and a high tensile strength can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the heat exchanger which improved durability and heat exchange efficiency, and improved workability.

It is an external appearance perspective view of a heat exchanger. It is a figure for demonstrating the outline | summary of a structure of a heat exchanger. It is a figure explaining the structure of an upper side gathering part. It is an exploded sectional view of a lid part and a box part of an upper gathering part. It is sectional drawing explaining the assembly procedure of a gathering part and a tubular body. It is a figure for demonstrating the flow direction of a thermal medium. It is the use mode figure which installed the cold-heat exchange unit in the thermal storage tank.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(Heat exchanger)
The heat exchanger according to this embodiment will be described. FIG. 1 is an external perspective view of the heat exchanger 100, and FIG. 2 is a diagram for explaining an outline of the configuration of the heat exchanger 100.

  As shown to Fig.1 (a), the heat exchanger 100 was equipped with the tubular body 120 which has a softness | flexibility, and the vertical direction which connected the tubular bodies in the both ends of the tubular body 120 arranged in multiple numbers was provided in the up-down direction. It is composed of a collection unit 130 (an upper collection unit 130a and a lower collection unit 130b). As shown in FIGS. 1 and 2, the gathering portion 130 has a rectangular box shape. The upper collecting portion 130 a is provided with an inlet 144 and a discharge port 146, and a heat medium can be circulated inside the tubular body 120 and the collecting portion 130. With this configuration, the heat exchanger 100 functions as a cooling coil and can make ice on the outer surface of the tubular body 120.

  In the present embodiment, in the present embodiment, the inflow port 144 and the discharge port 146 are provided in one of the collecting portions (upper collecting portion 130a). As shown in FIG. 2 (a), the inside of the upper gathering portion 130a is divided into two inner chamber portions. As will be described later, a first inner chamber 152 to which an inflow port 144 is connected and a discharge port 146 are provided. A second inner chamber 154 to be connected is formed. The other collecting portion (lower collecting portion 130b) is connected to all the tubular bodies 120, and the inside forms a single cavity as a whole.

  FIG. 1B is a cross-sectional view taken along line AA of the tubular bodies 120 arranged in a large number. In the present embodiment, the tubular body 120 is roughly divided into two regions in the collective portion 130 according to the internal configuration of the collective portion 130 described later.

  FIG.1 (c) is an expansion perspective view of the B section of FIG.1 (b). As shown in FIG. 1C, the tubular body 120 is a thin cylindrical member. Since the tubular body 120 needs to circulate water as a heat storage medium between the tubular bodies, the tubular body 120 is arranged with a predetermined interval. For example, the arrangement interval between the centers of the tubular bodies 120 is 6 mm when the heat exchanger 100 is used for an inner melting type ice thermal storage air conditioning system, and when the heat exchanger 100 is used for an outer melting type ice thermal storage type air conditioning system. Heat exchange efficiency can be improved by setting it as 10 mm space | interval.

  The tubular body 120 is preferably thin and thin because it needs to increase heat exchange efficiency and be flexible. For example, the wall thickness t can be 0.6 mm or less. For example, the diameter Φ can be 10 mm or less. By setting the thickness t to 0.6 mm or less, the heat transfer efficiency of the tubular body 120 can be improved. Further, by setting the diameter Φ of the tubular body 120 to 10 mm or less, flexibility can be exhibited while maintaining an appropriate strength. In addition, the tubular body 120 in this configuration has a strength capable of withstanding a load of 17 N or more per one as will be described later.

  With the above configuration, the tubular body 120 has flexibility, and even if the ice block 198 (FIG. 7) is generated on the outer surface, it is possible to prevent the refraction and breakage due to the compression of the ice block 198. In other words, the cooling coil is conventionally configured to withstand the pressure of growing ice, but in the present invention, the tubular body 120 is provided with flexibility to prevent breakage, so that the tubular body 120 has particularly high strength and rigidity. Is no longer needed. Therefore, the tubular body 120 can be made thin and thin, and sufficient heat transfer efficiency can be obtained even with a rigid resin material that is not excellent in heat transfer efficiency. Further, paradoxically, by making the tubular body 120 thin and thin, desired flexibility can be provided.

  In addition, by making the tubular body 120 thin and thin, the tubular body 120 can be arranged densely, and the surface area per unit mass of the heat medium flowing inside the tubular body 120 can be increased. Thereby, more tubular bodies 120 can be arranged with respect to the assembly part 130 of a fixed area. Therefore, the surface area is increased in the portion where a large number of tubular bodies 120 are arranged, that is, the heat transfer efficiency is increased because the heat transfer area is wide. In addition, the multiple tubular bodies 120 can support the water pressure applied to both the collecting portions (the upper collecting portion 130a and the lower collecting portion 130b). From these things, durability and cooling efficiency of the heat exchanger 100 can be improved.

  FIG. 2B is a cross-sectional view taken along the line CC in FIG. The tubular body 120 is preferably arranged in a staggered manner with respect to the joint portion 140 of the gathering portion 130. By arranging in this way, a large number of tubular bodies 120 can be arranged at substantially equal intervals between each tubular body 120 and other surrounding tubular bodies 120, and the outer surface of each tubular body 120 can be arranged. Becomes easier to come into contact with water. As a result, even if a large number of tubular bodies 120 are arranged, it is possible to effectively propagate the cold heat of the heat medium without biasing the generation of the ice mass 198 to a part. In addition, even if the large number of tubular bodies 120 are arranged in a staggered pattern, the gaps between the tubular bodies 120 can be easily cleaned because they can be seen from one direction.

  The tubular body 120 and the gathering portion 130 can be made of synthetic resin. For example, the tubular body 120 is formed using polypropylene as a material. Polypropylene is relatively resistant to temperature changes and has very little elution to the outside. Further, since it is lighter than metal and can be easily molded, even the tubular body 120 having a fine shape can be easily manufactured and transported. Further, like the tubular body 120, the aggregate portion 130 is formed using polypropylene. However, the assembly part 130 may use other synthetic resins, such as ABS. As a result, the durability of the heat exchanger 100 can be improved and the manufacturing cost can be kept low.

  FIG. 3 is a diagram illustrating the configuration of the upper gathering portion 130a, and FIG. 4 is an exploded sectional view of the lid portion 170 and the box portion 160 of the upper gathering portion 130a. With reference to FIG. 3 and FIG. 4, an internal configuration of the upper gathering unit 130 a will be described. The upper gathering portion 130 a has a rectangular box shape, and includes a box portion 160 and a lid portion 170. In particular, the upper gathering portion 130a is divided into a first inner chamber 152 and a second inner chamber 154 (see FIGS. 3B and 4B), and thus includes two lid portions 170. (See FIG. 3A and FIG. 4A).

  FIG. 3A is a top view of the upper gathering portion 130a. As shown in FIG. 3A, the lid part 170 is provided with an inflow port 144 or a discharge port 146, and can be connected to a heat medium supply pipe 194 and a discharge pipe 196 (see FIG. 6). .

  The lid part 170 has a rib 156 on the outer edge (FIG. 4A). The lid part 170 can be joined to the box part 160 by ribs 156 by thermal welding, which will be described later, and by having the ribs 156, deformation such as distortion and warpage can be prevented. The lid part 170 has a convex part 162 on the contact surface with the box part 160. When the lid part 170 is attached to the box part 160, the convex part 162 is fitted into the groove part 164 of the box part 160, so that the gap between the lid part 170 and the box part 160 can be sealed.

  FIG. 3B is a view of the box portion 160 in the upper gathering portion 130a as viewed from above. The box part 160 is provided with an insertion hole 142 through which the tubular body 120 is inserted in the bottom surface (joint part 140). The tubular body 120 is joined to the joining portion 140 by heat welding described later.

  As described above, the upper gathering portion 130a has two inner chambers, the first inner chamber 152 and the second inner chamber 154, and therefore the inner side of the box portion 160 is divided into two inner chamber portions. . In accordance with the two inner chamber portions, the plurality of tubular bodies 120 are also divided into two regions and arranged at the joint portion 140.

  As shown in FIG. 4B, the box portion 160 has a groove portion 164 that fits with the convex portion 162 of the lid portion 170. In addition, ribs 158 are provided at positions corresponding to the outer edges of the lid portion 170 in the two inner chamber portions of the box portion 160, and can be joined to the rib 156 of the lid portion 170 by thermal welding described later.

  As shown in FIG. 3B, the joint 140 has a collision portion 148 that is not connected to the tubular body 120 (without the insertion port 142) at a position facing the inflow port 144. The collision unit 148 can disperse the flow of the heat medium by colliding the heat medium flowing in from the inflow port 144. Therefore, the heat medium can be evenly circulated through all the tubular bodies 120 arranged in the joint 140 without being biased toward a part of the tubular bodies 120 facing the inflow port 144. As a result, the heat exchange efficiency can be further improved.

  In the present embodiment, the structures of the first inner chamber 152 and the second inner chamber 154 are the same, and the structures of the inflow port 144 and the discharge port 146 are also the same. In such a case, if a collision portion 148 is provided at a position facing the discharge port 146, a supply pipe for supplying a heat medium without distinguishing between the first inner chamber 152 and the second inner chamber 154. Since it can connect to 194 and the discharge pipe 196, the heat exchanger 100 can be installed simply.

  FIG. 4C is a cross-sectional view of the upper gathering portion 130 a in which the lid portion 170 is attached to the box portion 160. As shown in FIG. 4C, the upper gathering portion 130 a may have a packing 168 between the box portion 160 and the lid portion 170. The packing 168 is attached to the groove portion 164, for example, so that the gap 164 can be sandwiched between the groove portion 164 and the convex portion 162 of the lid portion 170 to seal the gap. Thereby, the 1st inner chamber 152 and the 2nd inner chamber 154 which do not leak a heat carrier can be formed in the inside of upper part gathering part 130a.

  3 and 4, only the upper gathering portion 130a is illustrated, but the lower gathering portion 130b is also a rectangular box shape and is configured by a box portion and a lid portion, and thus illustration thereof is omitted. However, since the inside of the lower gathering portion 130b forms a single cavity as a whole, the inner chamber portion of the lower gathering portion 130b is not divided (FIG. 2 (a)), and the lid portion is also One.

  FIG. 5 is a cross-sectional view for explaining the assembly procedure of the gathering portion 130 and the tubular body 120. With reference to FIG. 5, thermal welding of the collecting portion 130 and the tubular body 120 and the box portion 160 and the lid portion 170 constituting the collecting portion 130 will be described.

  As shown in FIG. 5A, first, an insertion hole 142 into which the tubular body 120 can be inserted is provided in advance in the joint portion 140 of the box portion 160. Next, as shown in FIG. 5B, the end of the tubular body 120 is inserted into the insertion hole 142. And the tubular body 120 can be heat-welded to the box part 160 as shown in FIG.5 (c) by press-fitting the heated wedge (wedge).

  Thus, the gap can be reliably sealed by thermally welding the tubular body 120 to the joint 140. Moreover, since it can join using a mutual material itself, without using other substances, such as an adhesive material, another substance does not flow out into a heat medium and a thermal storage tank. Therefore, contamination in the heat medium and the heat storage tank can be suppressed.

  Next, as shown in FIG. 5D, the lid part 170 is attached to the box part 160. At this time, a packing 168 (FIG. 4C) is mounted in the groove 164 in advance, and the lid 170 is attached from above. Then, the lid portion 170 and the box portion 160 are thermally welded as shown in FIG. 5E by heat-pressing the edge (ridge line) where the rib 156 of the lid portion 170 and the rib 158 of the box portion 160 are combined. Can do.

  Thus, the box part 160 and the lid part 170 are sealed by two means of packing 168 and heat welding. Thereby, it can seal reliably, can prevent the leakage of a heat medium, and can avoid the fall of a cooling function.

Table 1 shows a result of a tensile test per tubular body 120 according to the present embodiment. The tubular body 120 to be tested has a wall thickness t of 0.6 mm or less and a diameter Φ of 10 mm or less as in the above configuration.

  As shown in Table 1, although polypropylene, which is a material of the tubular body 120, has thermoplasticity, the tubular body 120 has a strength capable of withstanding a load of 17 N or more even under a temperature condition of 90 ° C. The 1000 times fatigue test is a test in which a tensile test was performed after applying a load (stress) that does not cause breakage to the tubular body 120 1000 times. From this test result, it can be seen that the tubular body 120 maintains a strength capable of withstanding a load of 17 N or more even after being used over time.

The cell pressure resistance is a value obtained by converting the load resistance of one tubular body 120 to the load resistance of the heat exchanger 100 according to the present embodiment. It is assumed that the heat exchanger 100 has a configuration in which 230 tubular bodies 120 are provided in an assembly part 130 of 0.09 m ² (30 cm square). Then, since one tubular body 120 has a load resistance of 96 N under the temperature condition of 25 ° C., the load resistance of 230 tubes of the tubular body 120 is divided by 0.09 m ² to have a load resistance of 245 kPa. You can see that

  As described above, the tubular body 120 having the above-described configuration has a sufficient load resistance even in a fine shape, and can maintain a sufficient load resistance even after aged use. Accordingly, the heat exchanger 100 according to the present embodiment can exhibit high durability based on sufficient load resistance.

  FIG. 6 is a diagram for explaining the flow direction of the heat medium. As described above, the heat medium can be circulated through the gathering portion 130 and the tubular body 120 joined by heat welding without leakage.

  Any heat medium can be used as long as it maintains a liquid state even below the freezing point of water. However, in this embodiment, propylene glycol can be used in consideration of safety and the like. Propylene glycol is an antifreeze and easy to use because of its low toxicity. Therefore, it can be easily circulated and used as a heat medium.

  As indicated by arrows in FIG. 6, the heat medium flows into the first inner chamber 152 through the supply pipe 194 from the inflow port 144 provided in the upper collecting portion 130a. When the heat medium flows into the first inner chamber 152, the heat medium is collided with the collision portion 148 of the joint portion 140 and the flow is dispersed. Therefore, the heat medium is evenly distributed to all the tubular bodies 120 arranged in the joint portion 140 of the first inner chamber 152 without being biased to a part of the tubular bodies 120 facing the inflow port 144.

  Then, the heat medium passes through the tubular body 120 and flows into the lower collecting portion 130b. The lower gathering portion 130b communicates with all the tubular bodies 120, and the heat medium flowing in from the tubular body 120 connected to the first inner chamber 152 passes through the lower gathering portion 130b and passes through the second inner chamber 130b. It is distributed upward by a tubular body 120 connected to 154. The heat medium flowing into the second inner chamber 154 is discharged from the discharge port 146 through the discharge pipe 196.

  According to such a structure, since the path | route of the tubular body 120 which heat-exchanges can be lengthened, it can be made to exchange heat reliably between a heat medium and water, and the cold of a heat medium can be utilized effectively. Therefore, the cooling efficiency of the heat exchanger 100 can be further improved.

(Cooling heat exchange unit)
A cold heat exchange unit 200 using the heat exchanger 100 according to the present embodiment will be described. FIG. 7 is a diagram showing how the cold heat exchange unit 200 is installed in the heat storage tank.

  As shown in FIG. 7, the heat exchanger 100 described above further constitutes a set of units (cold heat exchange unit 200) by a frame 180 that accommodates them and a transport handle 190 attached to the frame 180. be able to.

  The frame 180 functions as a casing (structure) of the tubular body 120 and the gathering portion 130, supports its own weight, and prevents the structure from collapsing during transportation or installation. The frame 180 has a frame shape made of an L-shaped member (angle material). As a material of the frame 180, it is preferable to use a material having rigidity, for example, aluminum can be suitably used. Aluminum is particularly suitable for this apparatus installed in water because it is lightweight and easy to process, and hardly dissolves in water.

  The transport handle 190 is preferably attached to the frame 180 on the upper side of the cold heat exchange unit 200. Providing the transport handle 190 facilitates the transport of the cold heat exchange unit 200 and reduces the labor required for the installation work in the heat storage tank. In addition, since the conventional metal cooling / heating coil has a weight of several hundred kilograms, a machine such as a lift is required for movement. However, the cold heat exchanging unit 200 having the above-described configuration can be configured to be extremely lightweight of about several tens of kilograms, and can be moved manually.

  Further, a hook-shaped locking portion 182 may be provided on the frame 180 on the lower side of the cold heat exchange unit 200. Then, by engaging the engaging portion 182 with the engaging portion 184 provided on the bottom surface of the heat storage tank, the cold heat exchange unit 200 can be fixed in water very easily and can be prevented from floating or flowing.

  In addition, the cold heat exchange unit 200 may include a reinforcing plate 186 that bundles and supports the tubular bodies 120 between the upper gathering portion 130a and the lower gathering portion 130b. For example, the reinforcing plate 186 may have a configuration in which the tubular body 120 is inserted into a plate-like member having a hole through which the tubular body 120 can be inserted and then joined to the gathering portion 130. Further, for example, the reinforcing plate 186 may be formed later by forming the heat exchanger 100 and then hardening it with resin or the like. By providing the reinforcing plate 186, the tubular body 120 can be supported in the middle, and even if the tubular body 120 has a fine and flexible shape, the durability against twisting is further improved, and bending, bending, Vibration and the like can be reduced.

  As described above, the cold heat exchange unit 200 can appropriately support the tubular body 120 having a fine shape by including the frame 180 and the reinforcing plate 186. Moreover, work efficiency can be improved by attaching the handle 190 for conveyance. From these things, it becomes possible to improve the durability and workability of the cold heat exchange unit 200 according to the present embodiment.

(Ice thermal storage air conditioning system)
An ice storage type air conditioning system using the heat exchanger 100 and the cold heat exchange unit 200 described above will be described. The ice heat storage type air conditioning system accommodates the cold heat exchange unit 200 in a heat storage tank.

  The ice heat storage type air conditioning system distributes a heat medium cooled below the freezing point of water in the heat exchanger 100 or the like housed in a heat storage tank using inexpensive nighttime electric power and low temperature outside air at night. And especially in the outer surface of the tubular body 120, water as a heat storage medium is frozen and cold energy is stored. And by using the melting latent heat of ice during the day when the temperature rises, it is possible to perform cooling with a high energy saving effect.

  Although the water in the heat storage tank is frozen, the tubular body 120 such as the heat exchanger 100 has flexibility. Therefore, even if the ice block 198 is generated on the surface of the tubular body 120 as shown in FIG. High durability without causing refraction or breakage due to compression of In addition, the tubular body 120 is densely arranged by thinning and thinning, and the surface area is large in a portion where a large number of the tubular bodies 120 are arranged, that is, the heat transfer area is wide, so that the cooling efficiency is extremely high.

  Further, in the heat exchanger 100 and the like, only the supply pipe 194 and the discharge pipe 196 are connected to the upper side collecting portion 130a on one side, so that when the heat storage tank is designed and constructed, the supply pipe 194 and the discharge pipe 196 The installation layout is easy.

  Further, since the heat exchanger 100 and the cold heat exchange unit 200 are low in manufacturing cost and easy to carry, the installation cost of the ice heat storage type air conditioning system using them can be suppressed. Therefore, according to the present embodiment as in the above configuration, it is possible to provide an ice heat storage type air conditioning system with extremely high cooling efficiency that is highly durable and has improved economy and workability.

  In the present embodiment, the inlet 144 and the outlet 146 are provided in one of the collecting portions (upper collecting portion 130a). However, the present invention is not limited to this. For example, the inlet 144 is connected to one of the collecting portions. The discharge port 146 may be provided in the other assembly portion. In that case, the heat medium flows in from one collecting portion, passes through all the tubular bodies, and then is discharged from the other collecting portion.

[Other Embodiments]
In the above embodiment, the heat exchanger 100 and the cold heat exchange unit 200 using cold energy have been described. However, the heat exchanger according to the present invention is not limited to ice heat storage, and can also be used as a heat exchanger for recovering waste heat from waste water and exhaust gas of less than 100 ° C. At this time, in exhaust heat recovery from exhaust gas at 100 ° C. or higher, water can be sprayed and exhaust heat recovery can be performed using condensation heat transfer in the form of latent heat.

  In this way, when used for exhaust heat recovery, a heat exchanger with excellent heat resistance, corrosion resistance, antifouling properties, and cleanability should be obtained by forming the tubular body and the gathering portion with polypropylene. Can do. Therefore, it is suitable for exhaust heat recovery from sewage and exhaust heat recovery from exhaust gas.

  Further, as in the case of using ice storage, it is lighter than metal and easy to mold, so even a finely shaped tubular body can be easily manufactured and transported. Furthermore, by forming the tubular body and the gathering portion from the same material and joining them by heat welding, the gap between the tubular body and the gathering portion can be reliably sealed, and a high tensile strength can be obtained.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for a heat exchanger used for storing cold energy in a heat storage tank, and an ice heat storage type air conditioning system using the heat exchanger.

DESCRIPTION OF SYMBOLS 100 ... Heat exchanger 120 ... Tubular body 130 ... Collecting part 130a ... Upper gathering part 130b ... Lower gathering part 140 ... Joining part 142 ... Insertion hole 144 ... Inlet 146 ... Outlet 148 ... Colliding part 152 ... 1st inner chamber 154 ... 2nd inner chamber 156, 158 ... rib 160 ... box part 162 ... convex part 164 ... groove part 168 ... packing 170 ... lid part 180 ... frame 182 ... locking part 184 ... engagement part 186 ... reinforcing plate 190 ... for transportation Handle 194 ... supply pipe 196 ... discharge pipe 198 ... ice block 200 ... cold heat exchange unit t ... thickness Φ ... diameter

Claims (12)

A tubular body having flexibility;
A pair of collecting portions that communicate with each other at both ends of the tubular bodies arranged in a large number;
An inlet and an outlet of the heat medium provided in the collecting portion;
With
The heat medium flows into the collecting portion from the inflow port, passes through the tubular body from the collecting portion to the other collecting portion, and is then discharged from the discharge port. Exchanger. The gathering part is a rectangular box shape,
The inside of one collecting part is divided into two inner chambers, and has a first inner chamber to which the inflow port is connected and a second inner chamber to which the discharge port is connected,
The other assembly is connected to all the tubular bodies,
The heat medium flows into the first inner chamber from the inflow port, passes through the tubular body communicating with the first inner chamber, flows to the other collecting portion, and then communicates with the second inner chamber. 2. The heat exchanger according to claim 1, wherein the heat exchanger flows through the tubular body to the second inner chamber and is discharged from the discharge port. The assembly part has a joint part that joins the tubular bodies arranged in a large number,
3. The heat exchanger according to claim 1, wherein the joint portion includes a collision portion that is not connected to the tubular body at a position facing the inflow port.   The heat exchanger according to any one of claims 1 to 3, wherein the tubular bodies are arranged in a staggered manner with respect to the collecting portion.   The heat exchanger according to any one of claims 1 to 4, wherein the tubular body has a wall thickness of 0.6 mm or less and a diameter of 10 mm or less.   The heat exchanger according to any one of claims 1 to 5, further comprising a reinforcing plate that bundles and supports the tubular bodies between the pair of collecting portions.   The heat exchanger according to any one of claims 1 to 6, wherein the tubular body is joined to the gathering portion by thermal welding. The gathering part is a rectangular box shape, and the gathering part is composed of a box part and a lid part,
The assembly part has a packing between the box part and the lid part,
Furthermore, the said box part and the said cover part are joined by heat welding, The heat exchanger of any one of Claim 1 to 7 characterized by the above-mentioned.   The heat exchanger according to any one of claims 1 to 8, wherein the tubular body is made of polypropylene.   The heat exchanger according to any one of claims 1 to 9, wherein the heat medium is propylene glycol. The heat exchanger is
A frame that accommodates the plurality of tubular bodies arranged in series and the pair of collecting portions;
A transport handle attached to the frame;
The heat exchanger according to any one of claims 1 to 10, further comprising:   An ice heat storage type air conditioning system, wherein the heat exchanger according to any one of claims 1 to 11 is housed in a heat storage tank.

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