JP2011102677A - Heat accumulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat accumulator which efficiently exchanges heat between a thermal storage medium and a heating medium and has high heat insulating performance. <P>SOLUTION: The heat accumulator in which the thermal storage medium 3 is stored inside a heat insulating container 2 includes: a first heating medium introduction part 10a penetrated through the heat insulating container 2 via a heat insulating member 8 and introducing a first heating medium to the heat insulating container 2; a first heating medium flow passage 17 passed through the inside of the thermal storage medium 3; and a first heating medium discharge part 10b formed by penetrating through the heat insulating container 2 via the heat insulating member 8 and discharging the first heating medium from the heat insulating container 2. The cross section interior peripheral length of the first heating medium flow passage 17 with respect to the thermal storage medium 3 is set larger than that of the first heating medium introduction part 10a and the heat insulating container penetrated part of the first heating medium discharge part 10b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a heat accumulator. Specifically, the present invention relates to a heat accumulator having high heat exchange efficiency between a heat medium and a heat accumulating material, high heat insulation, and capable of downsizing the apparatus.

  In order to heat the passenger compartment of an automobile, a heat pump type air conditioner is often used. A general heat pump type air conditioner for a vehicle is configured to take out the rotation of an engine and operate a compressor to move heat from outside air into the room. For this reason, the problem that the fuel consumption of an engine falls arises. Also, the air conditioner cannot be used unless the engine is operating.

  In addition, when the conventional air conditioner is applied to an electric vehicle, electricity must be used to operate a compressor in addition to a drive motor. Therefore, there is a problem that power consumption increases and battery consumption is accelerated.

  In order to alleviate the above problem, a system has been proposed in which exhaust heat generated by an engine, a motor, or the like is stored in a regenerator and used for air conditioning.

JP-A-2-220920 JP 2008-51446 A

  Patent Document 1 discloses a vehicle heat storage air-conditioning apparatus that performs air-conditioning of a vehicle interior using heat storage. In the vehicle heat storage air conditioner described in Patent Document 1, a pipe in which a heat medium such as a coolant flows is arranged in a heat storage container filled with a heat storage material to constitute a heat storage unit, and the engine is driven. The heat storage circuit including the power source is configured to store heat in the heat storage unit via the heat medium. On the other hand, the heat accumulated in the heat accumulator is moved into the passenger compartment through a heat dissipation circuit including an air conditioner provided in the passenger compartment to dissipate it, thereby heating the interior.

  In the heat storage air conditioner described in Patent Document 1, water is used as the heat storage material. However, the specific heat of water is small, and in order to obtain a sufficient amount of heat, a heat accumulator holding a large amount of water must be employed. For this reason, a problem arises in that the heat accumulator becomes larger and the weight increases. Moreover, since heat is stored using the specific heat of water, the heat capacity is small, and the temperature of the heat storage material changes as heat is radiated. For this reason, it is difficult to perform air conditioning at a stable temperature.

  In order to solve the above inconvenience, a resin heat storage material as described in Patent Document 2 and a heat storage device using the heat storage material are provided.

  A conventional heat accumulator is configured to pass a pipe through a heat storage container filled with a liquid or solid heat storage material, and to perform heat exchange between the heat medium and the heat storage material via a peripheral wall of the pipe.

  However, when heat exchange is performed via the peripheral wall of the pipe, the contact area between the heat storage material and the pipe is limited. For this reason, it is difficult to take out a large amount of heat from the regenerator in a short time or to input heat into the heat storage material. Further, in order to increase the contact area between the heat storage material and the pipe, it is necessary to provide a long pipe in the heat storage device, which causes a problem that the heat storage device is enlarged.

  Furthermore, the temperature in the engine room may rise to around 120 ° C. Since the solid resin heat storage material includes a heat storage resin having a low melting point such as paraffin, it is fluidized when the above temperature is applied. For this reason, a container for hermetically holding the heat storage material is required. For this reason, the structure of the heat accumulator becomes complicated, and problems such as an increase in the size of the heat accumulator arise.

  Furthermore, in order to effectively use the heat accumulated in the regenerator, it is necessary to provide high heat insulation so that heat from the regenerator does not flow out when not in use. However, there is a problem that heat easily escapes from the part where the heat medium enters and exits the heat storage container, and the heat insulating property of the heat accumulator is low.

  This invention makes it a subject to solve the said problem and to provide heat storage with high heat insulation while being able to perform heat exchange with a heat storage material and a heat medium efficiently.

  The invention described in claim 1 is a heat storage unit configured by accommodating a heat storage material inside a heat insulating container, and is formed through the heat insulating container through a heat insulating member. A first heat medium introduction portion for introducing the heat medium, a first heat medium flow path that passes through the inside of the heat storage material, and a heat insulating member that penetrates the heat insulating container, and the heat insulating container A first heat medium discharge section that discharges the first heat medium from the first heat medium flow path, the cross-sectional inner circumferential length of the first heat medium flow path with respect to the heat storage material, the first heat medium introduction section and the above It is set to be larger than the inner circumferential length of the cross section of the heat insulating container penetration part in the first heat medium discharge part.

  In the present invention, the first heat medium introduction part into which the first heat medium is introduced into the heat insulation container and the first heat medium discharge part from which the first heat medium is discharged from the heat insulation container are provided as heat insulation members. It is comprised so that the said heat insulation container may be penetrated through.

  By providing the first heat medium introduction part and the first heat medium discharge part via the heat insulating member, it is possible to prevent the heat accumulated in the heat accumulator from flowing out through these parts. For this reason, the heat insulation of a heat insulation container can be improved.

  The structure of the said heat insulation member is not specifically limited. The heat insulating member can be formed from a resin material having a low thermal conductivity. As the resin material, a heat-resistant resin material having low thermal conductivity such as epoxy resin can be employed.

  Moreover, in this invention, the cross-sectional inner peripheral length with respect to the said thermal storage material of the said 1st heat-medium flow path is made into the cross section of the said heat insulation container penetration part in the said 1st heat-medium introduction part and the said 1st heat-medium discharge part. It is set larger than the inner circumference.

  The contact area between the portion where the heat medium flows and the outer wall portion of the heat insulating container is set by setting the inner circumferential length of the cross section of the heat insulating container penetrating portion small in the first heat medium introducing section and the first heat medium discharging section. Can be set small. For this reason, it is possible to reduce the outflow of heat from the first heat medium introduction section and the first heat medium discharge section.

  On the other hand, in this invention, the cross-sectional inner peripheral length with respect to the said thermal storage material of the said 1st heat-medium flow path is made into the cross section of the said heat insulation container penetration part in a said 1st heat-medium introduction part and a said 1st heat-medium discharge part. It is set larger than the inner circumference. By adopting this configuration, the heat exchange area between the heat storage material and the first heat medium is increased as compared with the first heat medium introduction section or the first heat medium discharge section. Can do. Therefore, the heat exchange efficiency between the first heat medium and the heat storage material is increased. In addition, in order to improve the heat exchange efficiency between the heat medium of the subject 1 and the heat storage material, it is desirable to form the first heat medium flow path from a material having high thermal conductivity such as copper.

  According to a second aspect of the present invention, the heat insulating member can be configured as a piping member that changes the inner peripheral length.

  The piping member is formed of a material having low thermal conductivity, and is configured so that the inner peripheral length changes. For example, when a pipe member having a circular cross section is employed, the inner peripheral length can be configured such that the axial cross section changes into a taper shape while being formed from a heat insulating resin material. With this configuration, the first heat medium introduced into the heat insulating container can be smoothly guided to the first heat medium flow path, and heat exchange can be performed through a large heat exchange area. The finished first heat medium can be smoothly discharged from the first heat medium discharge section.

  In addition, the piping member is formed of a heat insulating material, and has a cross-sectional inner peripheral length that is smaller than the cross-sectional inner peripheral length of the heat medium flow path of the title 1. For this reason, the heat conduction to a heat insulation container can be suppressed to the minimum, and the heat insulation of a heat accumulator can be improved.

  The form of the piping member is not particularly limited. For example, as in the invention described in claim 3, the first heat medium introduction section and the first heat medium discharge section are formed of a cylindrical piping member, and the first heat medium flow path is formed. Can be formed in a cylindrical shape connected to the piping member, and the piping member can be configured to increase the inner diameter toward the first heat medium flow path. In addition, the said piping member and the 1st heat medium flow path can also be comprised from the member provided with forms other than a cylindrical member. For example, a piping member having a rectangular shape or the like may be employed.

  By configuring the piping member using a cylindrical pipe member, the inner diameter can be easily increased. For this reason, a heat exchanger can be configured easily.

  The invention described in claim 4 is formed through the heat insulating container through a heat insulating member, and also includes a second heat medium introducing portion for introducing a second heat medium into the heat insulating container, and the inside of the heat storage material. A second heat medium flow path that passes through the heat insulating container, and a second heat medium discharge portion that is formed through the heat insulating container through the heat insulating member and that discharges the second heat medium from the heat insulating container. This constitutes a regenerator.

  By using a heat storage heat storage medium and a heat dissipation heat medium to perform heat storage and heat dissipation, heat storage efficiency is increased. Moreover, the thermal accumulator which can be utilized for various uses can be comprised.

  The first heat medium and the second heat medium are not particularly limited. For example, engine cooling water can be used as the first heat medium, while air can be used as the second heat medium. In this case, the first heat medium is used for heat storage, while the second heat medium is used for heat dissipation.

  By forming the second heat medium introduction part and the second heat medium discharge part via the heat insulating member, heat escapes from the entrance / exit of the heat medium as in the invention described in claim 1. Can be prevented. For this reason, heat insulation can be improved.

  According to a fifth aspect of the present invention, one of the second heat medium introduction unit, the second heat medium discharge unit, and the first heat medium introduction unit is configured to replace the first heat medium introduction unit. The second heat medium introduction section, the other of the second heat medium discharge section, and the first heat medium discharge section are provided with a double pipe structure as an inner pipe, and the first heat medium discharge section A heat accumulator is configured with a double-pipe structure with the discharge part as an inner pipe.

  When the first heat medium and the second heat medium are used, it is necessary to provide an entrance / exit corresponding to each heat medium. For this reason, not only the structure of the heat accumulator is complicated, but heat easily escapes from the entrance / exit. Moreover, since it is necessary to secure a space for providing the entrance / exit of each heat medium, there is a problem that the heat storage container is enlarged.

  In the invention described in this claim, since the double pipe structure is adopted, the piping space can be reduced. For this reason, a thermal accumulator can be reduced in size. In addition, since the space at the entrance and exit of the heat medium is reduced, heat is less likely to escape from the inside of the regenerator, and heat insulation is improved.

  In the double pipe, the first heat medium introduction section and the first heat medium discharge section are set as the inner pipe. Therefore, it is preferable to set the first heat medium so that the heat storage heat medium flows.

  In addition, each heat-medium introduction part can also be made into a double tube structure, and a heat-medium introduction part and a heat medium discharge | emission part can also be made into a double tube structure.

  While improving heat exchange efficiency, a heat storage with high heat insulation can be provided.

It is an axial sectional view of the heat accumulator concerning a 1st embodiment. It is sectional drawing which follows the II-II line | wire in FIG. It is a principal part expanded sectional view which follows the III-III line in FIG. It is a perspective view which shows an example of the external appearance form of a heat conductive porous body. It is a whole perspective view showing appearance formation of a heat storage material. It is the whole heat storage material shown in FIG. 5, and the whole perspective view which provided the pipe which comprises a 1st heat-medium flow path. It is explanatory drawing which shows the process of filling a thermal storage member. It is a figure which shows the external appearance form of the thermal storage material filled with the thermal storage member, and is a principal part expanded sectional view which follows the VIII-VIII line in FIG. It is explanatory drawing which shows the process of providing a resin coating layer. It is principal part sectional drawing of the thermal storage material which provided the resin coating layer. It is an axial sectional view showing a 2nd embodiment of the invention in this application. It is sectional drawing which follows the XII-XII line | wire in FIG.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is a cross-sectional view showing an example of a heat accumulator according to the present invention.

  The heat accumulator 1 is configured by accommodating a cylindrical heat storage material 3 in a heat insulating container 2. The heat insulating container 2 includes a cylindrical housing portion 4 and conical lid portions 5 and 6 that are respectively joined to both sides of the housing portion 4. The accommodating portion 4 and the lid portions 5 and 6 are made of a heat insulating material. In addition, the said heat insulation container can also be comprised from the container which has a vacuum wall part.

  In the present embodiment, the heat storage material 3 is accommodated and held in the inner peripheral portion of the heat insulating container 2 via the heat insulating material 20 provided in the outer peripheral portion.

  A first heat medium introduction part 10a for introducing the first heat medium 7 and a second heat medium introduction part 11a for introducing the second heat medium 9 are provided at the end of the lid part 5 in the axial direction. Is provided. On the other hand, a first heat medium discharge unit 10b that discharges the first heat medium 7 and a second heat medium discharge unit 11b that discharges the second heat medium 9 are provided at the end of the lid 6. It has been. In addition, while providing each heat-medium introducing | transducing part 10a, 11a on the same side of the heat insulation container 2, each heat-medium discharge | emission part 10b. 11b is provided on the same side of the heat insulating container 2, but one heat medium introduction part and one heat medium discharge part may be provided on the same side. Moreover, each heat medium introduction | transduction part and each heat medium discharge | emission part can also be provided in the site | part from which a heat storage container differs, respectively.

  In the present embodiment, cooling water for cooling the automobile engine is employed as the first heat medium. On the other hand, air is employed as the second heat medium. The exhaust heat from the engine is stored in the regenerator 1 using the cooling water. The accumulated heat is configured to be used for air conditioning or the like via the air as the second heat medium.

  In the present embodiment, the first heat medium introduction unit 10a and the second heat medium introduction unit 11a are configured in a double tube structure. That is, the first heat medium introducing portion 10a is constituted by a pipe-like heat insulating piping member 8 provided along the axis. On the other hand, the second heat medium introducing portion 11a is formed integrally with the lid member 5 and includes a cylindrical wall portion 12a formed on the outer periphery of the piping member 8 via a cylindrical space 13a. The second heat medium 9 can be introduced from the side into the cylindrical wall portion 12a.

  A pipe 28 a through which the first heat medium flows is connected to the tip of the pipe member 8. On the other hand, a pipe 29a through which the second heat medium flows is connected to a portion extending laterally from the cylindrical wall portion 12a.

  In the present embodiment, the heat storage side heat medium 7 and the heat dissipation side heat medium 9 are provided in the lid part 5, and the first heat medium introduction part 10 a and the second heat medium introduction having a double tube structure are provided. It introduce | transduces into the inside of the thermal accumulator 1 through the part 11a. Moreover, while being provided in the cover part 6, it discharges | emits to the exterior of the thermal accumulator 1 via the 1st heat-medium discharge part 10b and the 2nd heat-medium discharge part 11b provided with a double tube structure. For this reason, it becomes possible to form the connection part connected with external piping 28a, 29a, 28b, 29b compactly. In addition, the parts to which the pipes 28a, 29a, 28b, and 29b are connected can be integrally formed, the pipe space can be reduced, and the heat accumulator 1 can be downsized.

  Furthermore, the piping member 8 which comprises the said 1st heat-medium introduction part 10a and the 1st heat-medium discharge part 10b, and the said 2nd heat-medium introduction part 11a and the said 2nd heat-medium discharge part 11b are comprised. The lid members 5 and 6 are both made of a highly heat-insulating material. By adopting the above configuration, the heat is accumulated inside the heat accumulator via the pipes 28a and 28b in which the first heat medium 7 is flowed or the pipes 29a and 29b in which the second heat medium is flowed. Heat can be prevented from being dissipated.

  On the other hand, in the present embodiment, the piping member 8 has a large diameter connected to the small diameter portion 8a on the heat medium introduction side and the first heat medium flow path 17 provided along the axis of the heat storage material 3. A portion 8b and a diameter-expanded portion 8c that is expanded in a tapered shape from the small-diameter portion to the large-diameter portion are configured.

  The inner peripheral length of the cross section of the portion through which the small diameter portion 8a penetrates the lid portions 5 and 6 is such that the large diameter portion 8b is connected to the heat conductive pipe 17b constituting the first heat medium flow path 17. It is set smaller than the inner circumferential length of the section. By adopting the above configuration, it is possible to reduce the contact area between the outer peripheral portion of the piping member 8 and the lid portions 5 and 6 in the portion where the first heat medium is introduced. The amount of heat transferred from the piping member 8 to the lid portions 5 and 6 can be reduced.

  In the present embodiment, the inner peripheral length of the cross section of the first heat medium flow path 17 is set to be larger than the small diameter portion 8a of the pipe member 8, and therefore, the first heat medium and the heat storage material 3 are set. The heat exchange area with can be set large. With this configuration, the heat exchange efficiency between the first heat medium and the heat storage material 3 can be increased.

  The material which comprises the said heat insulation container 2 is not specifically limited. It can be formed from a highly heat-insulating resin material. For example, the said heat insulation container can be comprised using an epoxy resin. Moreover, a part or all of the heat insulation container can be configured with a vacuum heat insulation structure.

  The material which comprises the said piping member 8 can also be formed from the resin material with high heat insulation similarly to the said heat insulation container.

  The configuration of the heat storage material 3 is not limited. It is desirable to employ a solid heat storage material so that the second heat medium and the heat storage material 3 are in direct contact with each other.

  As shown in FIG. 3, in the present embodiment, the heat storage material 3 includes a heat conductive porous body 15 having a gap 14 and a heat storage material 16 filled and held in the gap 14. .

  In FIG. 4, the outline | summary of the internal structure of the said heat conductive porous body 15 is shown. The heat conductive porous body 15 has a three-dimensional network structure having air permeability. In this embodiment, a nickel metal porous body having a porosity of 90% or more is employed.

  What was manufactured using the various method as the said heat conductive porous body 15 is employable. For example, the foamed porous resin support is coated with carbon or metal by a method such as electroless plating, vacuum deposition, or sputtering to impart conductivity. The porous resin support imparted with electrical conductivity is brought into close contact with the surface of the cathode body rotating around the rotating shaft also serving as a power supply bus bar in the plating bath, thereby electroplating the metal from the anode onto the porous body. . Thereafter, by removing the porous resin support, a metal porous body having continuous pores (voids) in which triangular columnar skeletons are three-dimensionally connected as shown in FIG. 4 can be obtained.

  As shown in FIG. 5, in the present embodiment, a plurality of disk-shaped thermally conductive porous members 15a having a predetermined thickness are stacked and assembled to form a cylindrical thermally conductive porous member having a required height. A mass 15 is formed.

  The heat conductive porous member 15a is cut out by a press or the like from a sheet-like heat conductive porous body (not shown). A through hole 17a constituting the first heat medium flow path 17 and a through hole 18a constituting the second heat medium flow path 18 are formed on each of the cut heat conductive porous members 15a using a drill or the like. Is formed. In addition, the process of forming the said through-holes 17a and 18a can also be performed with respect to the sheet-like heat conductive porous body before cutting out.

  By stacking a plurality of heat conductive porous members 15a so that the through holes 17a and 18a coincide with each other, a cylindrical heat conductive porous body 15 having a predetermined height is formed.

  As shown in FIG. 6, a copper heat conductive pipe 17 b constituting the first heat medium flow path 17 is inserted into the through hole 17 a provided in the shaft core. By adopting the heat conductive pipe 17b, heat exchange with the first heat medium can be performed efficiently. Further, by joining the heat conductive pipe 17b and the inner peripheral portion of the through hole 17a of the heat conductive porous body using a method of pressure bonding or brazing, the heat conduction efficiency between these members is further increased. Can be increased. The both ends of the heat conductive pipe 17b are connected to the large-diameter portion 8b of the piping member 8 described above, whereby the first heat medium 7 and the second heat medium 9 are combined with each other as described above. It introduce | transduces into the inside of the thermal storage 1 through a pipe structure, respectively.

  A heat storage material 16 is filled in the continuous pores 14 of the heat conductive porous body 15 provided with the heat medium flow paths 17 and 18. In the present embodiment, as shown in FIG. 7, after the plugs 22 are provided at both ends of the heat conductive pipe 17 b, the heat conductive porous body 15 is melted in the immersion bath 23. 16, the heat storage material 16 is filled into the continuous pores 14 of the thermally conductive porous body 15.

  After the heat storage material 16 is filled, the heat storage material 16 is solidified and fixed in the thermally conductive porous body by cooling and drying for a predetermined time.

  In FIG. 8, the expanded sectional view of the said heat conductive porous body 15 with which the said thermal storage material 16 was filled is shown. As shown in this figure, the heat storage material 16 is filled and held in the continuous pores 14 of the porous body other than the portion where the first heat medium flow path 17 and the second heat medium flow path 18 are provided. Yes.

  As the heat storage material according to the present embodiment, a heat storage material containing paraffin as a main ingredient and containing a preservative can be employed. For example, a heat storage material containing 95% paraffin and 5% polyethylene resin as a preservative can be employed. Although the melting point (glass transition temperature) of paraffin is 30 ° C. to 80 ° C., the shape retaining property is enhanced by containing the above-described retention component, and the continuous pores of the thermally conductive porous body 15 are increased to about 80 ° C. 14 can be held. Therefore, when a paraffin resin is included, the resin coating step is performed at a temperature of 80 ° C. or lower.

  Furthermore, in this embodiment, the resin coating layer 19 formed from the thermosetting resin is provided so that the outer peripheral part of the heat conductive porous body 15 filled with the said heat storage substance 16 may be covered. The resin coating layer 19 is also provided on the inner peripheral portion of the through hole 18 a and constitutes the second heat medium flow path 18.

  As shown in FIGS. 3 and 9, the resin coating layer 19 is obtained by immersing the thermally conductive porous body 15 filled with the heat storage material in an immersion layer 25 filled with a liquid thermosetting resin 24. It is formed. Thereby, a thin resin coating layer 19 of 0.2 to 0.3 mm is formed on the outer peripheral portion of the heat storage material 3. In addition, after coating with the said thermosetting resin as needed, the coating layer hardening process which hardens the said thermosetting resin in the furnace of predetermined temperature can be performed. The said coating layer hardening process is also performed at the temperature of 80 degrees C or less.

  In the present embodiment, an epoxy resin is employed as the thermosetting resin 24. As the epoxy resin before curing, a liquid resin at normal temperature is employed. By adopting the epoxy resin, the resin coating layer 19 can be formed without melting the heat storage material 16. In addition, the resin material which comprises the said resin coating layer 19 is not limited to an epoxy resin, Other thermosetting resin etc. are employable.

  In FIG. 10, the principal part expanded sectional view of the thermal storage material 3 in which the resin coating layer 19 was formed is shown.

  As shown in FIGS. 1 and 10, the outer peripheral portion of the cylindrical heat storage material 3, that is, the outer peripheral surface, the end surface, and the inner peripheral surface of the second heat medium flow path 18 are covered with the resin coating layer 19. It has been broken. Thereby, the heat storage material 16 filled and held in the continuous pores 14 of the thermally conductive porous body 15 is sealed by the resin coating layer 19. On the other hand, the outer peripheral surface of the pipe 17 b constituting the first heat medium flow path 17 is set in a state of being in contact with the heat conductive porous body 15 and the heat storage material 16.

  As described above, the epoxy resin constituting the resin coating layer 19 can be coated and cured at a temperature lower than the flow temperature of the heat storage material, and has a heat resistance temperature (glass transition temperature) of 120 ° C. or higher. Has been. For this reason, even when the heat storage material 3 is heated to the fluidization temperature of the heat storage material 16 or higher, the heat storage material 16 is held in the heat conductive porous body 15. By adopting this configuration, it is possible to use it as a heat storage material having a solid property even when it is disposed in an engine room or the like of an automobile that is exposed to high temperatures.

  Moreover, the said heat storage material 3 which concerns on this embodiment is equipped with the form which hold | maintained the heat storage substance 16 in the continuous pore 14 of the three-dimensional network-like heat conductive porous body 15 connected integrally. Further, the thermal conductivity of the thermally conductive porous body 15 is larger than that of the heat storage material 16. For this reason, in the inside of the said heat storage material 3, heat is mainly transferred through the said heat conductive porous body 15, and the speed of the heat transfer in the inside of the said heat storage material 3 is quick. Therefore, the heat input from a part of the heat storage material 3 can be moved to the entire area of the heat storage material 3 and stored. In addition, a large amount of heat can be dissipated in a short time by transferring heat from the entire region of the heat storage material 3 to the heat dissipating part.

  Moreover, in the present embodiment, the outer peripheral portion of the heat conductive pipe 17b constituting the first heat medium flow path 17 is configured to directly contact the heat conductive porous body 15 and the heat storage material 16. ing. For this reason, it is possible to increase the heat exchange efficiency between the first heat medium 7 and the heat storage material 16.

  On the other hand, a resin coating layer 19 is provided in the second heat medium flow path 18. The heat resistance temperature (softening temperature) of the resin coating layer 19 is higher than that of the heat storage material 16. For this reason, even when a temperature higher than the temperature at which the heat storage material 16 is fluidized acts, the heat storage material does not leak out from the heat storage material. Moreover, since the resin coating layer 19 is thin, the heat exchange efficiency with the second heat medium is also high.

  As a result, the regenerator 1 according to the present embodiment can be used not only for air conditioning such as heating, but also for warming up a drive system of an automobile.

  In the present embodiment, since a large number of the second heat medium flow paths 18 are provided, heat is transferred to the air as the second heat medium 9 through a very large heat exchange area. Therefore, a large amount of air can be raised to near the temperature of the heat storage material 16. And since the said resin coating layer 19 is formed thinly, there is no possibility that heat exchange may be inhibited.

  In the above embodiment, the cylindrical heat storage material 3 is filled in the cylindrical heat insulating container 2, and both ends of the heat conductive pipe 17 b constituting the first heat medium flow path 17 are connected to the piping member 8. , 8 are connected to the large diameter portions 8b, 8b, respectively. On the other hand, the second heat medium flow path 18 is gathered through the spaces of the lid portions 5 and 6, and through the annular spaces 13 a and 13 b respectively formed in the outer peripheral portion of the piping member 8, The pipes 29a and 29b are connected.

  With the above configuration, heat can be efficiently stored from the first heat medium 7 to the heat storage material 3, and heat can be transferred from the heat storage material 3 to the second heat medium 9 to perform air conditioning or the like. . Moreover, the introduction parts 10a and 11a for introducing the first heat medium 7 and the second heat medium 9, and the discharge parts 10b and 11b for discharging the first heat medium 7 and the second heat medium 9, It has a double-pipe structure with high thermal insulation. For this reason, it is difficult for the heat accumulated in the heat storage material 3 to escape from the connected pipes 28a, 28b, 29a, 29b. Therefore, the heat accumulator 1 with high heat insulation can be configured.

  In addition, although the process of filling the said thermal storage substance 16 was performed using the technique of dipping, these processes are not limited to the said embodiment. For example, the heat storage material can be filled using a method of injection molding in a state where the heat conductive porous body or the heat conductive porous member is held in a predetermined mold.

  11 and 12 show a second embodiment of the present invention.

  In the second embodiment, the first heat medium introduction section 110a, the first heat medium discharge section 110b, and the second heat medium introduction are employed without adopting the double pipe structure as shown in the first embodiment. The part 111a and the second heat medium discharge part 111b are configured.

  In the second embodiment, the second heat medium introduction part 111a and the second heat medium discharge part 111b are provided on the left and right axial walls, respectively. On the other hand, the first heat medium introduction part 110 a and the first heat medium discharge part 110 b are configured to penetrate into the heat insulating container 102 from above the peripheral wall of the heat insulating container 102. The heat medium flow path 117 is bent in a U-shape inside the heat storage material 103 accommodated in the heat insulating container 102 and changed in direction, and the piping member 108 constituting the first heat medium introduction unit, 108, respectively.

  The piping member 108 is formed of a heat-insulating resin material, and has a small-diameter portion 108a, a large-diameter portion 108b, and a configuration in which the inner circumferential length of the cross section increases from the small-diameter portion 108a to the large-diameter portion 108b. And an enlarged diameter portion 108c. The small diameter portion 108a is connected to pipes 128a and 128b of the heat storage side circuit through which the first heat medium 107 flows through the peripheral wall portion of the heat insulating container 102, respectively. On the other hand, the large diameter portion 108b is connected to a heat conductive pipe 117b that constitutes the first heat medium flow path 117.

  By adopting the above configuration, the external pipes 128a, 128b, 129a, and 129b can be connected to the outside of the heat insulating container 102 via the heat insulating pipe member 108. For this reason, it is possible to prevent the heat accumulated in the heat accumulator from escaping through the pipes 128a, 128b, 129a, and 129b.

  Moreover, since the small-diameter portion 108a is configured to penetrate the peripheral wall of the heat insulating container 102, the contact area between the outer peripheral portion of the piping member 108 and the peripheral wall of the heat insulating container 102 can be reduced. Therefore, heat conducted from the outer periphery of the piping member 108 to the outer periphery of the heat insulating container can be minimized.

  Furthermore, the second heat medium introduction part 111a and the second heat medium discharge part 111b are connected to the external pipes 129a and 129b via heat insulating members 131a and 131b. For this reason, it is possible to effectively prevent heat from escaping from the second heat medium introduction unit 111a and the second heat medium discharge unit 111b.

  By adopting each of the above configurations, the heat exchange efficiency between the heat storage material 103 and the first heat medium 107 and the heat exchange efficiency between the heat storage material 103 and the second heat medium 109 can be increased. In addition, it is possible to configure the heat storage container 102 with high heat insulation.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  A heat accumulator with high heat exchange efficiency with the heat medium and high heat insulation can be formed.

DESCRIPTION OF SYMBOLS 1 Heat storage 2 Heat insulation container 3 Heat storage material 7 1st heat medium 8 Piping member (heat insulation member)
9 second heat medium 17 first heat medium flow path 18 second heat medium flow path 10a first heat medium introduction part 10b first heat medium discharge part 11a second heat medium introduction part 11b second Heat medium discharge section

Claims (5)

A heat accumulator configured to contain a heat storage material inside an insulated container,
A first heat medium introduction section that is formed through the heat insulation container through a heat insulation member, and that introduces a first heat medium into the heat insulation container;
A first heat medium flow path passing through the inside of the heat storage material;
And a first heat medium discharge unit that is formed through the heat insulating container through a heat insulating member and discharges the first heat medium from the heat insulating container,
A cross-sectional inner peripheral length of the first heat medium flow path with respect to the heat storage material is set to be larger than a cross-sectional inner peripheral length of the heat insulating container penetrating portion in the first heat medium introduction part and the first heat medium discharge part. A regenerator.   The regenerator according to claim 1, wherein the heat insulating member is a piping member that changes the inner peripheral length. The first heat medium introduction part and the first heat medium discharge part are constituted by a cylindrical piping member,
Forming the first heat medium flow path into a cylindrical shape connected to the piping member;
The regenerator according to claim 2, wherein the piping member is configured to expand an inner diameter toward the first heat medium flow path. A second heat medium introduction section that is formed through the heat insulation container through a heat insulation member, and that introduces a second heat medium into the heat insulation container;
A second heat medium flow path that passes through the inside of the heat storage material;
4. The apparatus according to claim 1, further comprising: a second heat medium discharge unit that is formed to penetrate the heat insulating container through a heat insulating member and discharges the second heat medium from the heat insulating container. The heat accumulator according to item. One of the second heat medium introduction part, the second heat medium discharge part, and the first heat medium introduction part have a double tube structure in which the first heat medium introduction part is an inner pipe. As well as
The other of the second heat medium introduction part, the second heat medium discharge part, and the first heat medium discharge part have a double tube structure in which the first heat medium discharge part is an inner pipe. The heat accumulator of Claim 4 provided.

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