Heat storage device and heating, ventilation and air conditioning system

Abstract

The embodiments of the present application relate to the technical field of heating, ventilation and air conditioning systems. Provided are a heat storage device and a heating, ventilation and air conditioning system. The heat storage device comprises a housing and a heat exchange assembly, wherein an accommodating cavity is provided in the housing, and the accommodating cavity accommodates a heat storage material and the heat exchange assembly that is at least partially embedded in the heat storage material. The heat exchange assembly comprises at least one heat exchange unit. Each heat exchange unit comprises a plurality of columns of heat exchange tubes embedded in the heat storage material. Adjacent columns of heat exchange tubes include a plurality of first heat exchange tubes and a plurality of second heat exchange tubes. The central plane of the heat storage material divides the heat storage material into a front portion and a rear portion; the first heat exchange tubes at the most upstream part of a charging flow path and the second heat exchange tubes at the most downstream part are embedded within the front portion of the heat storage material, and the first heat exchange tubes at the most downstream part and the second heat exchange tubes at the most upstream part are embedded within the rear portion of the heat storage material; the number of first heat exchange tubes in the front portion is less than the number of first heat exchange tubes in the rear portion, and the number of second heat exchange tubes in the rear portion is less than the number of first heat exchange tubes in the front portion.

Description

Heat storage device and heating and ventilation system

[0001] The present application claims priority to the Chinese patent application No. 202411392690X, filed on September 30, 2024, and entitled "Heat storage device and heating and ventilation system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of heating and ventilation technology, and in particular to a heat storage device and a heating and ventilation system. BACKGROUND

[0003] The uniform flow path design of the phase change heat storage heat exchanger can ensure that the phase change heat storage material gradually stores (releases) heat from top (bottom) to bottom (top) during the heat storage and release process, so that the heat absorption (release) utilization rate of the phase change heat storage material is low. SUMMARY

[0004] The present application provides a heat storage device and a heating and ventilation system, which can improve the heat absorption (release) utilization rate of the phase change heat storage material by changing the layout of the heat exchange pipes.

[0005] In a first aspect, the present application provides a heat storage device, comprising:

[0006] a housing, which is internally provided with a containing cavity, the containing cavity containing a heat storage material and a heat exchange assembly at least partially embedded in the heat storage material,

[0007] The heat exchange assembly comprises at least one heat exchange unit, and the heat exchange unit comprises a plurality of rows of heat exchange pipes embedded in the heat storage material, a plurality of heat exchange pipes of each row of heat exchange pipes being arranged in a row along a first direction, and the plurality of rows of heat exchange pipes being arranged in a row along a second direction;

[0008] Among them, the two adjacent rows of heat exchange pipes comprise a plurality of first heat exchange pipes and a plurality of second heat exchange pipes;

[0009] Each of the two adjacent first heat exchange pipes is connected by a first bridge pipe, and the plurality of first heat exchange pipes are sequentially connected by a plurality of first bridge pipes to form a charging flow path, and the charging flow path is connected with an external heat source to form a charging loop;

[0010] Each of the two adjacent second heat exchange pipes is connected by a second bridge pipe, and the plurality of second heat exchange pipes are sequentially connected by a plurality of second bridge pipes to form a discharging flow path, and the discharging flow path is connected with an external utilization unit to form a discharging loop, and the flow direction of the discharging flow path is opposite to that of the charging flow path;

[0011] The heat storage material defines a center plane, the center plane divides the heat storage material into a front half and a rear half, the heat storage material in the front half is embedded with the first heat exchange pipe at the most upstream of the charging flow path and the second heat exchange pipe at the most downstream, the heat storage material in the rear half is embedded with the first heat exchange pipe at the most downstream and the second heat exchange pipe at the most upstream, the number of the first heat exchange pipes in the front half is less than the number of the first heat exchange pipes in the rear half, and the number of the second heat exchange pipes in the rear half is less than the number of the first heat exchange pipes in the front half.

[0012] In some embodiments, the heat exchange assembly includes a plurality of heat exchange units, and the plurality of heat exchange units are arranged in the second direction.

[0013] In some embodiments, the heat exchange assembly includes a pipe structure, the pipe structure includes a plurality of header pipes and a plurality of delivery pipes, the header pipes are located on the same side of the heat exchange unit as the most upstream first heat exchange pipe in the first direction, one end of the delivery pipe communicates with the header pipe, and the other end of the delivery pipe communicates with the corresponding charging flow path and discharging flow path.

[0014] In some embodiments, the heat exchange unit further includes two side plates, the two side plates are respectively arranged on two sides of the heat exchange unit in the third direction.

[0015] In some embodiments, the heat storage device further includes a gap maintainer, the gap maintainer is connected with the side plates of the plurality of heat exchange units, and the plurality of heat exchange units are arranged in the second direction.

[0016] In some embodiments, the gap maintainer includes a first connecting piece, the first connecting piece is located on the same side of the heat exchange unit as the most downstream first heat exchange pipe in the first direction, and the first connecting piece includes a first plate body and a plurality of first fixing portions arranged on the first plate body, the plurality of first fixing portions are arranged in the second direction, and the first fixing portion is connected with the corresponding side plate; and,

[0017] In some embodiments, the gap maintainer includes a second connecting piece, the second connecting piece is located on the same side of the heat exchange unit as the most upstream first heat exchange pipe in the first direction, and the second connecting piece includes a second plate body and a plurality of second fixing portions arranged on the second plate body, the plurality of second fixing portions are arranged in the first direction, and the second fixing portion is connected with the corresponding side plate.

[0018] In some embodiments, the heat storage device further includes a protection structure, the protection structure is located on the same side of the heat exchange unit as the most downstream first heat exchange pipe in the first direction, and the protection structure covers the first connecting piece and is connected with the plurality of side plates, and the protection structure protrudes from the heat exchange unit in the third direction.

[0019] In some embodiments, the heat storage device comprises a header fixing member mounted on the heat exchange unit, and the header fixing member is provided with a plurality of mounting holes at intervals, and a plurality of headers are correspondingly mounted in the plurality of mounting holes.

[0020] In some embodiments, the heat storage device comprises two header fixing members arranged on opposite sides of the heat exchange assembly along the second direction, and the header fixing member comprises a plate portion and a plurality of mounting portions connected to the plate portion, the plate portion extends along the third direction, and the plurality of mounting portions protrude from the heat exchange assembly along the second direction.

[0021] In some embodiments, the housing has side shells arranged opposite along the third direction, and the side shells are provided with a plurality of mounting matching portions on the side facing the other side shell, and the plurality of mounting matching portions are connected with the corresponding plurality of mounting portions.

[0022] In some embodiments, the plurality of headers comprises a charging inlet pipe, a charging outlet pipe, a discharging inlet pipe and a discharging outlet pipe, the charging inlet pipe is communicated with the most upstream first heat exchange pipe, the charging outlet pipe is communicated with the most downstream first heat exchange pipe, the discharging inlet pipe is communicated with the most upstream second heat exchange pipe, and the discharging outlet pipe is communicated with the most downstream second heat exchange pipe.

[0023] In some embodiments, the pipeline structure further comprises a plurality of three-way pipes, one end of each three-way pipe is communicated with one conveying pipe, and the other two ends of each three-way pipe are respectively communicated with two rows of heat exchange pipes of the corresponding heat exchange unit.

[0024] In some embodiments, the plurality of rows of heat exchange pipes comprises at least one group of heat exchange pipe units, each heat exchange pipe unit comprises two adjacent rows of heat exchange pipes, and each row of heat exchange pipes in at least one group of heat exchange pipe units comprises a plurality of first heat exchange pipes and a plurality of second heat exchange pipes.

[0025] In some embodiments, the plurality of rows of heat exchange pipes comprises at least one group of heat exchange pipe units, each heat exchange pipe unit comprises two adjacent rows of heat exchange pipes, one row of heat exchange pipes in at least one group of heat exchange pipe units comprises a plurality of first heat exchange pipes, and the other row of heat exchange pipes in at least one group of heat exchange pipe units comprises a plurality of second heat exchange pipes.

[0026] In some embodiments, the heat storage device further comprises an outer shell, the housing is arranged in the outer shell, and the outer shell comprises a plurality of outer side shells, an outer top cover and an outer bottom disc, the outer top cover is arranged close to one side of the most upstream first heat exchange pipe along the first direction and connected to one side of the outer side shell, and the outer bottom disc is arranged close to one side of the most upstream first heat exchange pipe along the first direction and connected to the other side of the outer side shell opposite to the one side.

[0027] In some embodiments, the heat storage device further comprises an insulation layer attached to an outer surface of the housing, the outer shell covers an outer side of the insulation layer, and the insulation layer has a mounting space between the outer shell and the outer top cover.

[0028] In some embodiments, the insulation layer comprises a first insulation layer and a second insulation layer, the first insulation layer is closer to the housing than the second insulation layer.

[0029] In some embodiments, the first insulation layer has a smaller hardness than the second insulation layer.

[0030] In some embodiments, the first insulation layer comprises at least one of a sponge layer and a rubber layer.

[0031] In some embodiments, the second insulation layer comprises at least one of a vacuum insulation panel and a polyurethane panel.

[0032] In some embodiments, the outer surface of the housing has a protrusion embedded in the first insulation layer.

[0033] In some embodiments, the protrusion comprises a plate body and a standing edge bent from the plate body.

[0034] In some embodiments, the housing comprises a first end housing, a second end housing, and a side housing, the side housing surrounds a receiving cavity, the first end housing covers a side of the receiving cavity close to the outer top cover in a first direction, and the second end housing covers a side of the receiving cavity close to the outer bottom disc in the first direction.

[0035] In some embodiments, the heat storage material is filled in the receiving cavity and has a space from the first end housing.

[0036] In some embodiments, an outer surface of the second end housing is provided with a first support portion supported on the outer bottom disc.

[0037] In some embodiments, the first support portion comprises a first plate portion attached to the outer surface of the second end housing.

[0038] In some embodiments, the first support portion comprises two groups of first support feet respectively arranged at edges of the first plate portion in a second direction and supported on a bottom wall of the outer shell.

[0039] In some embodiments, an edge of the first plate portion in a third direction has a second plate portion, the second plate portion, the first support feet, and the first plate portion form a first limiting space, and a part of the insulation layer is located in the first limiting space.

[0040] In some embodiments, the first insulation layer is at least partially located in the first limiting space, and the second insulation layer is located outside the first limiting space and attached to the first insulation layer.

[0041] In some embodiments, the second thermal insulation layer has a gap between the side away from the first thermal insulation layer and the outer base plate.

[0042] In some embodiments, the outer surface of the first end shell is provided with two sets of second support portions, and the two sets of second support portions and the first end shell form a second limiting space in which a thermal insulation layer is arranged.

[0043] In some embodiments, the second support portion includes a first connecting portion that is attached to the outer surface of the first end shell.

[0044] In some embodiments, the second support portion includes an intermediate portion that is connected to the first connecting portion and extends in the first direction, and the intermediate portion, the first connecting portion, and the first end shell surround the second limiting space.

[0045] In some embodiments, the second support portion further includes a second connecting portion connected to the side of the intermediate portion away from the first connecting portion, the second connecting portion is parallel to the first connecting portion, and the second connecting portion and the intermediate portion form a third limiting space with the outer side shell.

[0046] In some embodiments, the third limiting space is provided with a thermal insulation layer, and the thermal insulation layer is attached to the intermediate portion and the second connecting portion.

[0047] In some embodiments, the second support portion further includes a third connecting portion connected to the side of the intermediate portion away from the second connecting portion, the third connecting portion is parallel to the intermediate portion.

[0048] In some embodiments, the inner surface of the outer side shell has a hanging portion, and the third connecting portion is clamped with the hanging portion.

[0049] In some embodiments, the outer side shell includes an outer side shell body and a first bending portion formed by bending the outer side shell body, and the first bending portion of one of the two adjacent outer side shells is connected to the outer side shell body of the other of the two outer side shells by a fastener.

[0050] In some embodiments, the second thermal insulation layer forms an avoidance area corresponding to the first bending portion, and the avoidance area extends in the first direction.

[0051] In some embodiments, the first bending portion of at least one of the two adjacent outer side shells is bent to form a second bending portion away from the outer side shell body, the second bending portion extends towards the avoidance area and is arranged opposite the fastener.

[0052] In some embodiments, the outer base plate includes an outer base plate body and a standing plate formed by bending the outer base plate body, the standing plate is attached to the outer side shell, and in the first direction, the edge of the standing plate does not exceed the edge of the outer side shell.

[0053] In some embodiments, the outer surface of the outer base has an outer support leg.

[0054] In some embodiments, the shell has a wire arrangement opening and a pipe outlet opening on one side of the shell close to the outer top cover in the first direction, and the pipe outlet opening is configured to allow a pipe connected to the heat exchange assembly to extend out of the shell.

[0055] In some embodiments, the heat storage device further comprises a temperature sensing assembly, the temperature sensing assembly comprises a temperature sensing probe and a terminal connected to the temperature sensing probe, the temperature sensing probe is arranged in the heat storage material, and an external wire connected to the terminal extends out of the shell through the wire arrangement opening.

[0056] In some embodiments, the mounting space is provided between the thermal insulation layer and the outer top cover, the external wire passes through the thermal insulation layer and extends to the mounting space, and at least one of the plurality of outer side shells and the outer top cover is provided with a wire passing hole in communication with the mounting space.

[0057] In some embodiments, at least one of the plurality of outer side shells and the outer top cover is further provided with a pipe passing hole in communication with the mounting space, and the pipe passing hole is configured to allow a pipe connected to the heat exchange assembly to extend out.

[0058] In a second aspect, the embodiments of the present application provide a heating and ventilation system, comprising:

[0059] a heat source unit;

[0060] a first utilization unit; and

[0061] The heat storage device described above, the heat storage device is in communication with the heat source unit through a charging circuit, and the heat storage device is in communication with the first utilization unit through a discharging circuit.

[0062] In some embodiments, the heat source unit comprises a main heat source unit, the main heat source unit is in communication with the heat storage device through the charging circuit, and the main heat source unit comprises one of a solar heat collecting module, a water source heat exchange module and an air source heat exchange module.

[0063] In some embodiments, the heat source unit comprises an auxiliary heat source unit, the auxiliary heat source unit is in communication with the heat storage device through the charging circuit, and the main heat source unit comprises an electric heating module.

[0064] In some embodiments, a second utilization unit is further included, the heat source unit is in communication with the second utilization unit through a heat transfer pipe, and the heat transfer pipe is connected in parallel with the charging circuit.

[0065] In some embodiments, the heating and ventilation system has a first working mode, and when the heating and ventilation system is in the first working mode, the heat source unit provides heat for the first utilization unit.

[0066] In some embodiments, the heating and ventilation system has a second working mode, and the heat source unit provides heat for the second utilization unit when the heating and ventilation system is in the second working mode. BRIEF DESCRIPTION OF DRAWINGS

[0067] Fig. 1 is a perspective view of a heat storage device according to an embodiment of the present application;

[0068] Fig. 2 is a sectional view of the heat storage device of Fig. 1 taken along line H-H;

[0069] Fig. 3 is a perspective view of the heat storage device according to an embodiment of the present application;

[0070] Fig. 4 is an exploded view of the heat storage device according to an embodiment of the present application;

[0071] Fig. 5 is a structural view of a shell according to an embodiment of the present application;

[0072] Fig. 6 is a structural view of a heat exchange assembly according to an embodiment of the present application;

[0073] Fig. 7 is a structural view of the heat exchange assembly of Fig. 6 from another perspective;

[0074] Fig. 8a is a structural view of a heat exchange unit pipe distribution according to an embodiment of the present application;

[0075] Fig. 8b is a structural view of a heat exchange unit pipe distribution according to another embodiment of the present application;

[0076] Fig. 9 is a structural view of a heat exchange unit pipe distribution according to another embodiment of the present application;

[0077] Fig. 10 is a structural view of a pipe structure according to an embodiment of the present application;

[0078] Fig. 11 is a structural view of a manifold fixing member according to an embodiment of the present application;

[0079] Fig. 12 is an exploded view of a shell according to an embodiment of the present application;

[0080] Fig. 13 is a structural view of a plurality of heat exchange units, a first connecting member, and a second connecting member according to an embodiment of the present application;

[0081] Fig. 14 is a structural view of a plurality of heat exchange units connected together by a gap retainer according to an embodiment of the present application;

[0082] Fig. 15 is a structural view of a plurality of heat exchange units, a protective structure, and a first connecting member according to an embodiment of the present application;

[0083] Fig. 16 is an enlarged view of B in Fig. 2;

[0084] Fig. 17 is an enlarged view of C in Fig. 2;

[0085] Fig. 18 is an enlarged view of A in Fig. 2;

[0086] Fig. 19 is an enlarged view of H in Fig. 4;

[0087] Fig. 20 is an enlarged view of D and E in Fig. 4;

[0088] Fig. 21 is a structural schematic diagram of a heat storage device provided with a temperature sensing assembly according to an embodiment of the present application;

[0089] Fig. 22 is a structural schematic diagram of a heating and ventilation system according to an embodiment of the present application.

[0090] BRIEF DESCRIPTION OF DRAWINGS: 1000, heat storage device; 100, housing; 100a, accommodating cavity; 100b, wire arranging port; 100c, pipe outlet; 110, mounting fitting part; 120, raised part; 121, plate body part; 122, vertical edge; 130, first end housing; 130a, second limiting space; 130b, third limiting space; 131, second support part; 1311, first connecting part; 1312, intermediate part; 1313, second connecting part; 1314, third connecting part; 140, second end housing; 141, first support part; 1411, first plate part; 1412, first support leg; 1413, second plate part; 140a, first limiting space; 150, side housing; 200, heat storage material; 300, heat exchange assembly; 310, heat exchange unit; 310a, charging flow path; 310b, discharging flow path; 311, first heat exchange pipe; 312, second heat exchange pipe; 313, first bridge pipe; 314, second bridge pipe; 320, pipeline structure; 321, manifold; 3211, charging inlet pipe; 3212, charging outlet pipe; 3213, discharging inlet pipe; 3214, discharging outlet pipe; 322, delivery pipe; 323, tee connector; 330, edge plate; 400, gap maintainer; 410, first connecting piece; 411, first plate body; 412, first fixing part; 420, second connecting piece; 421, second plate body; 422, second fixing part; 500, protection structure; 600, manifold fixing piece; 600a, mounting hole; 610, plate part; 620, mounting part; 700, outer shell; 700a, mounting space; 700b, wire passing hole; 700c, pipe passing hole; 710, outer side shell; 7101, hanging part; 711, outer side shell body; 712, first bending part; 713, fastener; 714, second bending part; 720, outer top cover; 730, outer bottom disc; 731, outer bottom disc plate body; 732, vertical plate; 7301, outer support leg; 800, thermal insulation layer; 810, first thermal insulation layer; 820, second thermal insulation layer; 820a, avoidance area; 900, temperature sensing assembly; 910, temperature sensing probe; 920, terminal; 2000, heat source unit; 2000a, charging circuit; 3000, first utilization unit; 3000a, discharging circuit; 4000, second utilization unit; 4000a, heat transfer pipeline;

[0091] First direction XX; second direction YY; third direction ZZ; central plane KK; front half M; back half N.

[0092] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0093] In order to make the purpose, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application with reference to the accompanying drawings.

[0094] The following description of the application will be presented in the light of the accompanying drawings, in which like numerals represent like elements or similar elements unless otherwise described. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0095] In the description of the present application, it should be understood that the terms "first", "second" and the like are only set for the purpose of description, and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in specific cases. In addition, in the description of the present application, "a plurality of" means two or more, unless otherwise stated. The description of the relationship between the associated objects means that there can be three kinds of relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are a kind of "or" relationship.

[0096] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0097] In the phase change heat storage device, the heat storage material is converted from solid to liquid phase change heat storage material by heating. Affected by the properties of the heat storage material, it is necessary to avoid breaking the inner container containing the heat storage material during state transition. Therefore, in the conventional phase change heat storage heat exchanger, the upstream of the charging flow path is located at the upper end of the phase change heat storage material, and the downstream of the charging flow path is located at the lower end of the phase change heat storage material, that is, the phase change heat storage material is gradually charged from top to bottom. The upstream of the discharging flow path is located at the lower end of the phase change heat storage material, and the downstream of the discharging flow path is located at the upper end of the phase change heat storage material, that is, the phase change heat storage material is gradually discharged from bottom to top.

[0098] However, during the heat storage process, the upper heat storage material first contacts the upstream of the charging flow path, and after heat exchange, the temperature of the heat source decreases at the downstream of the charging flow path, resulting in insufficient heat storage of the lower heat storage material, and further resulting in low utilization rate of the heat capacity of the heat storage material. During the heat release process, the downstream of the discharging flow path contacts the upper heat storage material for a short time, which cannot fully exchange heat with the upper heat storage material, resulting in low heat release utilization of the upper heat storage material.

[0099] Based on the above problems, the embodiment of the present application provides a heat storage device 1000, which can improve the utilization rate of heat absorption (release) of the phase change heat storage material 200 by changing the layout of the heat exchange pipes.

[0100] Specifically, referring to FIGS. 1-5, the heat storage device 1000 comprises a shell 100 and an outer shell 700, the outer shell 700 covers the shell 100, the shell 100 is provided with a containing cavity 100a, the containing cavity 100a contains a heat storage material 200 and a heat exchange assembly 300 at least partially embedded in the heat storage material 200, referring to FIGS. 6-7, the heat exchange assembly 300 comprises at least one heat exchange unit 310, the heat exchange unit 310 comprises a plurality of rows of heat exchange pipes embedded in the heat storage material 200, a plurality of heat exchange pipes of each row of heat exchange pipes are arranged in a row along a first direction XX, and the plurality of rows of heat exchange pipes are arranged in a row along a second direction YY, referring to FIGS. 8a-9, wherein the adjacent two rows of heat exchange pipes comprise a plurality of first heat exchange pipes 311 and a plurality of second heat exchange pipes 312, every adjacent two first heat exchange pipes 311 are connected through a first bridge pipe 313, the plurality of first heat exchange pipes 311 are sequentially connected through the plurality of first bridge pipes 313 to form a charging flow path 310a, the charging flow path 310a is connected with an external heat source to form a charging loop 2000a, every adjacent two second heat exchange pipes 312 are connected through a second bridge pipe 314, the plurality of second heat exchange pipes 312 are sequentially connected through the plurality of second bridge pipes to form a discharging flow path 310b, the discharging flow path 310b is connected with an external utilization unit to form a discharging loop 3000a, the flow direction of the discharging flow path 310b is opposite to the flow direction of the charging flow path 310a, the heat storage material 200 defines a center plane KK, the center plane KK divides the heat storage material 200 into a front half M and a rear half N, the heat storage material 200 of the front half M is embedded with the most upstream first heat exchange pipe 311 and the most downstream second heat exchange pipe 312 of the charging flow path 310a, the heat storage material 200 of the rear half N is embedded with the most downstream first heat exchange pipe 311 and the most upstream second heat exchange pipe 312, the number of the first heat exchange pipes 311 of the front half M is less than the number of the first heat exchange pipes 311 of the rear half N, and the number of the second heat exchange pipes 312 of the rear half N is less than the number of the first heat exchange pipes 311 of the front half M.

[0101] That is, the heat exchange area of the first heat exchange pipe 311 of the front half M is reduced, the heat exchange time of the heat storage material 200 in the front half M with the charging flow path 310a is reduced, the heat absorption amount of the heat storage material 200 in the front half M is reduced, the heat exchange area of the second heat exchange pipe 312 of the front half M is increased, the discharging flow path 310b can fully exchange heat with the heat storage material 200 in the front half M, and thus the utilization rate of heat release of the heat storage material 200 in the front half M can be improved.

[0102] Meanwhile, the heat exchange area of the first heat exchange tube 311 in the latter half N is increased, so that the heat exchange duration between the heat storage material 200 in the latter half N and the charging flow path 310a is increased, and the utilization rate of the heat capacity of the heat storage material 200 in the latter half N is improved.

[0103] The shell 100 is configured to protect the heat storage material 200 and the heat exchange assembly 300. The shell 100 can have a cubic structure or other shapes such as a cylindrical shape. In this application, the shell 100 is exemplarily described as having a cubic structure.

[0104] It can be understood that the plurality of first heat exchange tubes 311 are sequentially connected through the plurality of first bridge tubes 313 to form a charging flow path 310a, and the plurality of second heat exchange tubes 312 are sequentially connected through the plurality of second bridge tubes to form a discharging flow path 310b. The charging flow path 310a and the discharging flow path 310b have a disc shape, so that the heat exchange area of the charging flow path 310a and the discharging flow path 310b with the heat storage material 200 is increased, and the full utilization of the heat storage material 200 is improved.

[0105] Specifically, the plurality of heat exchange tubes include at least one set of heat exchange tube units, and each column of heat exchange tubes in the at least one set of heat exchange tube units includes a plurality of first heat exchange tubes 311 and a plurality of second heat exchange tubes 312. It can be understood that when the plurality of heat exchange tubes include a plurality of sets of heat exchange tube units, each column of heat exchange tubes in each set of heat exchange tube units also includes a plurality of first heat exchange tubes 311 and a plurality of second heat exchange tubes 312. In this way, by arranging the first heat exchange tubes 311 and the second heat exchange tubes 312 in each column of heat exchange tubes, the number of the first heat exchange tubes 311 and the second heat exchange tubes 312 in the former half M and the latter half N can be effectively controlled.

[0106] In a specific embodiment, with reference to the orientation shown in FIG. 8a, the leftmost two columns of heat exchange tubes are exemplarily described. The number of the first heat exchange tubes 311 in the former half M is 8, and the number of the second heat exchange tubes 312 is 16. The number of the first heat exchange tubes 311 in the latter half N is 16, and the number of the second heat exchange tubes 312 is 8. The number of the first heat exchange tubes 311 and the second heat exchange tubes 312 does not change. Only in the former half M, one-third of the first heat exchange tubes 311 are replaced by the second heat exchange tubes 312, and in the latter half N, one-third of the second heat exchange tubes 312 are replaced by the first heat exchange tubes 311.

[0107] In another embodiment, as shown in FIG. 9, at least one group of heat exchange pipe units includes a plurality of first heat exchange pipes 311, and at least one group of heat exchange pipe units includes a plurality of second heat exchange pipes 312, that is, each column of heat exchange pipes only has first heat exchange pipes 311, or each column of heat exchange pipes only has second heat exchange pipes 312. In this way, if the number of first heat exchange pipes 311 and second heat exchange pipes 312 in the front half portion M and the rear half portion N is controlled, the spacing between adjacent two first heat exchange pipes 311 in the second direction YY and the spacing between adjacent two second heat exchange pipes 311 can be increased, that is, the distribution of the first heat exchange pipes 311 in the front half portion M is relatively sparse compared to the distribution of the first heat exchange pipes 311 in the rear half portion N, and the distribution of the second heat exchange pipes 312 in the front half portion M is relatively dense compared to the distribution of the second heat exchange pipes 312 in the rear half portion N.

[0108] In another embodiment, as shown in FIG. 9, at least one group of heat exchange pipe units includes a plurality of first heat exchange pipes 311, and at least one group of heat exchange pipe units includes a plurality of second heat exchange pipes 312, that is, each column of heat exchange pipes only has first heat exchange pipes 311, or each column of heat exchange pipes only has second heat exchange pipes 312. In this way, if the number of first heat exchange pipes 311 and second heat exchange pipes 312 in the front half portion M and the rear half portion N is controlled, the spacing between adjacent two first heat exchange pipes 311 in the second direction YY and the spacing between adjacent two second heat exchange pipes 311 can be increased, that is, the distribution of the first heat exchange pipes 311 in the front half portion M is relatively sparse compared to the distribution of the first heat exchange pipes 311 in the rear half portion N, and the distribution of the second heat exchange pipes 312 in the front half portion M is relatively dense compared to the distribution of the second heat exchange pipes 312 in the rear half portion N.

[0109] It can be understood that in order to support the heat exchange pipes and ensure the heat exchange efficiency between the heat exchange pipes and the heat storage material, a plurality of fins are arranged at intervals along the third direction in the embodiment of the present application. The fins are provided with a plurality of mounting holes in the front half portion M and the rear half portion N. The heat exchange pipes are selectively inserted into the mounting holes. The number of the first heat exchange pipes 311 in the front half portion M is less than the number of the first heat exchange pipes 311 in the rear half portion N, and the number of the second heat exchange pipes 312 in the rear half portion N is less than the number of the first heat exchange pipes 311 in the front half portion M.

[0110] When described in the orientation shown in FIG. 9, the number of mounting holes in the leftmost column and in the front half portion M is 18, but only 11 mounting holes are inserted with the first heat exchange pipes 311. The number of mounting holes in the leftmost column and in the rear half portion N is also 18, but 13 mounting holes are inserted with the first heat exchange pipes 311. In this way, the number of the first heat exchange pipes 311 in the front half portion M is less than the number of the first heat exchange pipes 311 in the rear half portion N, and the number of the second heat exchange pipes 312 in the rear half portion N is less than the number of the first heat exchange pipes 311 in the front half portion M, while the entire heat exchange unit 310 is designed to be lightweight, and the cost is also reduced.

[0111] For the convenience of description and understanding of the specific structure of the heat storage device 1000, the first direction XX, the second direction YY and the third direction ZZ are defined, with the orientation shown in FIG. 7 as a reference, the first direction XX is the up-down direction, the second direction YY is the left-right direction, and the third direction ZZ is the front-back direction. Of course, it can be understood that in some embodiments, the first direction XX can also be the left-right direction, and the second direction YY is the up-down direction. That is, the direction of the first direction XX can be determined according to the actual use state, and some embodiments of the present application take the first direction XX as the up-down direction as an example for description.

[0112] The heat exchange assembly 300 can include one heat exchange unit 310, or can include a plurality of heat exchange units 310, depending on the actual product design. In order to improve the heat exchange efficiency and make the entire heat storage device 1000 compact, please refer to FIG. 7, in the embodiments of the present application, the heat exchange assembly 300 includes a plurality of heat exchange units 310 and a pipe structure 320.

[0113] Among them, a plurality of heat exchange units 310 are arranged at intervals along the second direction YY, the pipe structure 320 includes a plurality of header pipes 321 and a plurality of conveying pipes 322, the header pipe 321 is located on the same side of the heat exchange unit 310 along the first direction XX with the most upstream first heat exchange pipe 311, one end of the conveying pipe 322 is in communication with the header pipe 321, and the other end of the conveying pipe 322 is in communication with the corresponding charging flow path 310a and discharging flow path 310b.

[0114] The plurality of header pipes 321 are configured to collect external heat sources and external utilization units, and then are conveyed to the corresponding heat exchange units 310 through the corresponding conveying pipes 322, which simplifies the pipe network, reduces the use amount of pipe materials and connecting pieces, and also reduces the complexity and cost of installation and maintenance.

[0115] The plurality of header pipes 321 are located on the same side of the heat exchange unit 310 along the first direction XX with the most upstream first heat exchange pipe 311, which fully utilizes the space in the shell 100, so that the structure distribution in the entire shell 100 is more compact.

[0116] Based on the need of the header pipe 321 to collect external heat sources and external utilization units, and the need to flow with the corresponding charging flow path 310a and discharging flow path 310b, in the embodiments of the present application, please continue to refer to FIGS. 6-7, the plurality of header pipes 321 include a charging inlet pipe 3211, a charging outlet pipe 3212, a discharging inlet pipe 3213 and a discharging outlet pipe 3214, the charging inlet pipe 3211 is in communication with the most upstream first heat exchange pipe 311, the charging outlet pipe 3212 is in communication with the most downstream first heat exchange pipe 311, the discharging inlet pipe 3213 is in communication with the most upstream second heat exchange pipe 312, and the charging outlet pipe 3212 is in communication with the most downstream second heat exchange pipe 312.

[0117] Please refer to 8-9, the external heat pump will deliver the external heat source to the charging inlet pipe 3211, and then through the delivery pipe 322 to each heat exchange unit 310, the heat exchange unit 310 exchanges heat with the heat storage material 200, and the heat of the external heat source is transferred to the heat storage material 200 and then enters the charging outlet pipe 3212 through the delivery pipe 322, and then is delivered to the external heat pump for heating, forming the charging flow path 310a.

[0118] The utilization unit is collected at the discharging inlet pipe 3213, and then delivered to each heat exchange unit 310 through the delivery pipe 322, the heat exchange unit 310 exchanges heat with the heat storage material 200, and the utilization unit absorbs the stored heat from the heat storage material 200 and then enters the discharging outlet pipe 3214 through the delivery pipe 322, and finally is delivered to the outside of the heat storage device 1000, forming the discharging flow path 310b.

[0119] In order to improve the heat exchange efficiency, that is, further improve the utilization rate of the heat storage material 200, referring to FIG. 10, the pipe structure 320 further includes a plurality of three-way pipes 323, one end of each three-way pipe 323 is communicated with a delivery pipe 322, and the other two ends of each three-way pipe 323 are respectively communicated with two rows of heat exchange pipes of the corresponding heat exchange unit 310.

[0120] Each heat exchange unit 310 includes a plurality of rows of heat exchange pipes, which can be two, three, four, five, and six, etc. The present application exemplarily describes that each heat exchange unit 310 includes four rows of heat exchange pipes, and in order to ensure that the charging flow path 310a and the discharging flow path 310b can fully exchange heat with the heat storage material 200, taking the orientation of FIG. 7 as a reference, the four rows of heat exchange pipes are sequentially and spacedly distributed from left to right, wherein the first heat exchange pipe 311 is at the most upstream and the most downstream of the charging flow path 310a of the first row of heat exchange pipes and the third row of heat exchange pipes, and the second heat exchange pipe 312 is at the most upstream and the most downstream of the discharging flow path 310b of the second row of heat exchange pipes and the fourth row of heat exchange pipes. In this way, the four rows of heat exchange pipes are spacedly arranged to fully exchange heat with the heat storage material 200, thereby improving the heat exchange efficiency in a certain space.

[0121] When each heat exchange unit 310 includes four columns of heat exchange pipes, four three-way connecting pipes 323 are simultaneously needed, i.e., one three-way connecting pipe 323 connects the first column of heat exchange pipes and the third column of heat exchange pipes to the first heat exchange pipe 311 at the most upstream of the charging flow path 310a; one three-way connecting pipe 323 connects the first column of heat exchange pipes and the third column of heat exchange pipes to the first heat exchange pipe 311 at the most downstream of the charging flow path 310a; one three-way connecting pipe 323 connects the second column of heat exchange pipes and the fourth column of heat exchange pipes to the second heat exchange pipe 312 at the most upstream of the discharging flow path 310b; and one three-way connecting pipe 323 connects the first column of heat exchange pipes and the third column of heat exchange pipes to the second heat exchange pipe 312 at the most downstream of the discharging flow path 310b. Through the arrangement of the three-way connecting pipes 323, the space can be maximally utilized, the heat exchange area is increased, the arrangement of the pipes is reduced, and the material cost is reduced.

[0122] Referring back to FIGS. 6-7, in order to fix the plurality of manifold pipes 321 and ensure the stability of the manifold pipes 321, the heat storage device 1000 includes a manifold pipe fixing member 600, which is installed on the heat exchange unit 310 and is provided with a plurality of mounting holes 600a at intervals, and the plurality of manifold pipes 321 are correspondingly installed in the plurality of mounting holes 600a. The manifold pipe fixing member 600 stably installs the manifold pipes 321 on the heat exchange unit 310, effectively preventing the manifold pipes 321 from shaking or shifting during operation, thereby ensuring the stability and reliability of the entire heat exchange system.

[0123] Further, referring to FIG. 11, the heat storage device 1000 includes two manifold pipe fixing members 600, which are arranged on opposite sides of the heat exchange assembly 300 along the second direction YY. The double-sided fixing manner effectively prevents the manifold pipes 321 from shifting or shaking during operation, thereby enhancing the structural stability of the entire heat exchange assembly 300.

[0124] Further, referring to FIG. 11, the manifold pipe fixing member 600 includes a plate portion 610 and a plurality of mounting portions 620 connected to the plate portion 610. The plate portion 610 extends along the third direction ZZ, and the plurality of mounting portions 620 protrude from the heat exchange assembly 300 along the second direction YY. The housing 100 has two side shells 150 arranged opposite to each other along the second direction YY. Referring to FIG. 12, the side shell 150 is provided with a plurality of mounting matching portions 110 on the side facing the other side shell 150, and the plurality of mounting matching portions 110 are connected to the corresponding plurality of mounting portions 620.

[0125] Since the plurality of mounting portions 620 are protruded along the second direction YY from the heat exchange assembly 300, when assembling the heat exchange assembly 300 and the shell 100, a gap can be formed between the heat exchange assembly 300 and the side shell 150, as shown in FIG. 2, so that the possibility of the heat exchange assembly 300 contacting the side shell 150 of the shell 100 during the installation of the heat exchange assembly 300 can be reduced, the damage caused by the possible scratches during the installation process is reduced, and the integrity of the heat exchange assembly 300 and the shell 100 is protected.

[0126] In addition, the gap between the heat exchange assembly 300 and the side shell 150 can provide a containing position for the heat storage material 200. Since the heat storage material 200 is in direct contact with the heat exchange assembly 300, even if there is a bump or even a drop during transportation, the heat exchange assembly 300 is difficult to contact the side shell 150, thereby improving the safety and reliability of the entire heat storage device 1000.

[0127] The plurality of mounting portions 620 of each plate portion 610 can be two, three, or the like, and are specifically set according to actual conditions, which are not limited here. Specifically, the mounting portion 620 and the mounting cooperating portion 110 can be plate-shaped structures, and bolt holes are formed. The mounting portion 620 and the mounting cooperating portion 110 are connected by lapping and bolt connection. Of course, in some other possible embodiments, the mounting portion 620 and the mounting cooperating portion 110 can also have other structures or other connection modes, such as clamping and welding, which are not specifically limited here.

[0128] Based on the plurality of heat exchange units 310, in order to ensure that the plurality of heat exchange units 310 can be in sufficient contact with the heat storage material 200, in the embodiment of the present application, referring to FIGS. 13-14, the heat exchange unit 310 further includes two side plates 330, and the two side plates 330 are respectively arranged on two sides of the heat exchange unit 310 along a third direction ZZ; the heat storage device 1000 further includes a gap maintainer 400, and the gap maintainer 400 is connected with the side plates 330 of the plurality of heat exchange units 310, and the plurality of heat exchange units 310 are sequentially and spacedly arranged along the second direction YY.

[0129] By fixing the gap maintainer 400 on the side plate 330, a gap can be formed between the adjacent two heat exchange units 310, which can provide a space for filling the heat storage material 200, so that the plurality of heat exchange units 310 can be in sufficient heat exchange with the heat storage material 200.

[0130] Please continue to refer to FIG. 13, the gap maintainer 400 includes a first connecting piece 410 and a second connecting piece 420.

[0131] With the orientation of FIG. 13 as reference, specifically, the first connecting member 410 can be arranged at the bottom of the heat exchange units 310 along the first direction XX, and the first connecting member 410 comprises a first plate body 411 and a plurality of first fixing portions 412 arranged on the first plate body 411, the first plate body 411 can be arranged along the second direction YY, and the plurality of first fixing portions 412 can be arranged along the second direction YY in sequence and at intervals, so that the plurality of first fixing portions 412 can be arranged in the same direction as the plurality of heat exchange units 310, so that the first fixing portion 412 can be connected with the bottom of the corresponding side plate 330, so that the first connecting member 410 can sequentially connect the bottoms of the plurality of side plates 330.

[0132] The second connecting member 420 can be arranged at the top of the heat exchange units 310 along the first direction XX, and the second connecting member 420 comprises a second plate body 421 and a plurality of second fixing portions 422 arranged on the second plate body 421, the second plate body 421 can also be arranged along the second direction YY, and the plurality of second fixing portions 422 can be arranged along the second direction YY in sequence and at intervals, so that the plurality of second fixing portions 422 can be arranged in the same direction as the plurality of sub-heat exchangers, so that the second fixing portion 422 can be connected with the top of the corresponding side plate 330, so that the second connecting member 420 can sequentially connect the tops of the plurality of side plates 330.

[0133] Therefore, by the first connecting member 410 and the second connecting member 420, the plurality of heat exchange units 310 can be constrained and fixed, which not only defines the gap between the two adjacent heat exchange units 310, but also assembles the plurality of heat exchange units 310 into a whole, and by setting the distance between the two adjacent first fixing portions 412 and the distance between the two adjacent second fixing portions 422, the size of the gap between the two adjacent heat exchange units 310 can be easily controlled, facilitating the filling of the heat storage material 200.

[0134] Referring to FIG. 14, since in the embodiment of the present application, the plurality of heat exchange pipes of each column of heat exchange pipes are arranged up and down in a column along the first direction XX, and the plurality of columns of heat exchange pipes are arranged in rows at intervals along the second direction YY, and the adjacent two columns of heat exchange pipes comprise a plurality of first heat exchange pipes 311 and a plurality of second heat exchange pipes 312, and the adjacent two first heat exchange pipes 311 are communicated via a first bridge pipe 313, and the adjacent two second heat exchange pipes 312 are communicated via a second bridge pipe 314, so the first bridge pipe 313 and the second bridge pipe 314 will protrude from the corresponding first heat exchange pipe 311 and second heat exchange pipe 312 along the third direction ZZ, therefore, in order to reduce the probability of collision between the first bridge pipe 313 and the second bridge pipe 314 and the shell 100 when installing the heat exchange assembly 300.

[0135] Therefore, in the embodiment of the present application, referring to FIG. 15, the heat storage device 1000 further comprises a protective structure 500, which is located on the same side of the heat exchange unit 310 as the most downstream first heat exchange pipe 311 along the first direction XX, covers the first connecting piece 410 through the protective structure 500, and is connected with the plurality of side plates 330, and the protective structure 500 is protruded to the heat exchange unit 310 along the third direction ZZ.

[0136] In this way, the protective structure 500 can have a gap between the heat exchange unit 310 and the shell 100 along the third direction ZZ, thereby forming a protective layer, so that the protective structure 500 can prevent the heat exchange unit 310, especially the heat exchange pipe, from being damaged by knocking.

[0137] In the embodiment of the present application, referring to FIG. 16, the heat storage device 1000 further comprises a heat preservation layer 800.

[0138] Specifically, the outer shell 700 serves as an appearance component of the entire heat storage device 1000, and can protect the shell 100 located in the outer shell 700. The outer shell 700 comprises a plurality of outer side shells 710, an outer top cover 720, and an outer bottom disc 730. The outer top cover 720 is close to the side of the most upstream first heat exchange pipe 311 along the first direction XX and is connected to one side of the outer side shell. The outer bottom disc 730 is close to the side of the most downstream first heat exchange pipe 311 along the first direction XX and is connected to the other side of the outer side shell opposite to the one side. Based on the shell 100 being cuboid, the entire outer shell 700 can also be cuboid in the embodiment of the present application.

[0139] The heat preservation layer 800 is attached to the outer surface of the shell 100, and the outer shell 700 covers the outer side of the heat preservation layer 800. The heat preservation layer 800 can effectively reduce the loss of heat. During the heat storage and heat release processes, the heat preservation layer 800 can ensure more heat energy to be exchanged and released in the shell 100, thereby improving the heat exchange efficiency of the system.

[0140] Specifically, referring to FIGS. 16-17, the heat preservation layer 800 comprises a first heat preservation layer 810 and a second heat preservation layer 820. The first heat preservation layer 810 is closer to the inner container than the second heat preservation layer 820. The hardness of the first heat preservation layer 810 is less than that of the second heat preservation layer 820.

[0141] Due to the lower hardness, the first heat preservation layer 810 often has better flexibility and adhesion, and can be more closely attached to the surface of the shell 100, thereby reducing the heat bridge effect and reducing the rate of heat loss to the outside through the heat preservation layer 800. At the same time, the second heat preservation layer 820 serves as an outer protection, further enhancing the overall heat preservation effect, and the second heat preservation layer 820 has a higher hardness, thereby providing additional support and stability for the entire heat preservation system.

[0142] Further, the second thermal insulation layer 820 comprises at least one of a vacuum insulation board and a polyurethane board. In order to improve the thermal insulation effect on the whole shell 100, the vacuum insulation board or the polyurethane board is arranged as the thermal insulation layer 800. The vacuum insulation board has the characteristics of flat surface, high hardness, no bending, no large deformation, no pressure bearing, easy to break and failure. The outer surface of the shell 100 can have a protrusion, which can reduce the thermal insulation effect of the vacuum insulation board. Therefore, in the embodiment, the first thermal insulation layer 810 prevents the second thermal insulation layer 820 from contacting the shell 100, thereby ensuring the thermal insulation effect of the second thermal insulation layer 820. The first thermal insulation layer 810 can be a sponge layer or a rubber layer, which is not limited here.

[0143] It can be understood that, in order to further protect the second thermal insulation layer 820, a third thermal insulation layer 800 (not shown in the figure) can be arranged between the second thermal insulation layer 820 and the outer shell 700. The third thermal insulation layer 800 can be a sponge layer or a rubber layer, which can jointly protect the second thermal insulation layer 820 with the first thermal insulation layer 810.

[0144] Since the phase change heat storage material 200 and the heat exchange component are filled in the containing cavity 100a of the shell 100, and the heat storage material 200, the external heat source and the utilization unit have large temperature changes, the pressure bearing of the shell 100 has high requirements. Therefore, in the embodiment, the outer surface of the shell 100 has a protrusion 120, i.e. a reinforcing rib. As shown in FIG. 16, the shell 100 is a stainless steel liner. The stainless steel liner will expand when heated. The reinforcing rib can increase the rigidity and stability of the stainless steel liner. The main function of the reinforcing rib is to resist the deformation force generated when the stainless steel liner expands due to heating.

[0145] The protrusion 120 is embedded in the first thermal insulation layer 810. Specifically, the protrusion 120 is a reinforcing rib. The reinforcing rib is generally welded with the shell 100. After welding, some welding slag can be left, which is difficult to clean. The residual welding slag is also difficult to contact the second thermal insulation layer 820 under the covering effect of the first thermal insulation layer 810, thereby ensuring the thermal insulation effect of the second thermal insulation layer 820.

[0146] Further, referring to FIG. 16, the protrusion 120 comprises a plate body 121 and a standing edge 122 formed by bending the plate body 121. The presence of the standing edge 122 can strengthen the structural strength of the whole protrusion 120, thereby enabling the shell 100 to better resist deformation and damage when subjected to external force.

[0147] In the embodiments of the present application, please continue to refer to FIG. 12, the shell 100 includes a first end shell 130, a second end shell 140, and a side shell 150, the side shell 150 surrounds to form a containing cavity 100a, the first end shell 130 covers one side of the containing cavity 100a close to the outer top cover 720 along the first direction XX, and the second end shell 140 covers one side of the containing cavity 100a close to the outer bottom disc 730 along the first direction XX, that is, the first end shell 130 corresponds to the outer top cover 720, the second end shell 140 corresponds to the outer bottom disc 730, and the side shell 150 corresponds to the outer side shell 710.

[0148] The split design makes each part of the shell 100 can be manufactured and transported separately, and then assembled. Such a modular design not only simplifies the manufacturing process, but also reduces transportation costs. At the same time, when maintenance or replacement of parts is required, it is also more convenient to operate, improving maintenance efficiency.

[0149] The heat storage material 200 is filled in the containing cavity 100a of the shell 100 and has a spacing with the first end shell 130, as shown in FIG. 2, when the heat storage material 200 changes state, the containing cavity 100a has enough space to accommodate the heat storage material 200 whose volume changes due to state change, reducing the pressure on the shell 100 caused by the change, thereby reducing the risk of rupture of the shell 100.

[0150] Please refer to FIG. 17, in some embodiments, the outer surface of the second end shell 140 is provided with a first support part 141, the first support part 141 is supported on the outer bottom disc 730, the first support part 141 can support the entire shell 100, and plays a role of shock absorption and buffering, when the heat storage device 1000 is subjected to external impact or vibration, the first support part 141 can absorb part of the energy and reduce its influence on the second end shell 140; secondly, the first support part 141 can make the second end shell 140 and the outer bottom disc 730 have a gap, which can give the installation position of the heat preservation layer 800.

[0151] Specifically, please refer back to FIG. 12 and continue to refer to FIG. 17, the first support part 141 includes a first plate part 1411 and two groups of first support feet 1412.

[0152] The first plate part 1411 can be attached to the outer surface of the second end shell 140 by welding or the like, so that the entire first support part 141 has enough area in contact with the second end shell 140, ensuring that the second end shell 140 is uniformly stressed as a whole.

[0153] The first support feet 1412 are respectively arranged at the edges of the first plate part 1411 along the second direction YY and are supported on the bottom wall of the outer shell 700, so that the first support feet 1412 support the entire shell 100, and the first support feet 1412 occupy a small space, making the overall structure compact.

[0154] As shown in FIG. 17, the first plate portion 1411 has a second plate portion 1413 along the edge in the third direction ZZ, and the second plate portion 1413, the first support leg 1412, and the first plate portion 1411 can form a first limiting space 140a.

[0155] In the embodiment, the thermal insulation layer 800 attached to the outer surface of the shell 100 includes multiple parts, such as a first sub-thermal insulation layer 800 attached to the outer surface of the first end shell 130, a second sub-thermal insulation layer 800 attached to the outer surface of the second end shell 140, and a third sub-thermal insulation layer 800 attached to the outer surface of the side shell 150. Each sub-thermal insulation layer 800 includes a first thermal insulation layer 810 and a second thermal insulation layer 820.

[0156] The first limiting space 140a can serve as a guide, facilitating the positioning of part of the thermal insulation layer 800 in the first limiting space 140a. In some embodiments, the first thermal insulation layer 810 in the second sub-thermal insulation layer 800 is installed in the first limiting space 140a, simplifying the installation steps of the first thermal insulation layer 810.

[0157] The second thermal insulation layer 820 is located outside the first limiting space 140a and is attached to the first thermal insulation layer 810. There is a gap between the side of the second thermal insulation layer 820 away from the first thermal insulation layer 810 and the outer bottom disc 730. In this way, the second thermal insulation layer 820 with higher hardness can be prevented from contacting the outer bottom disc 730, thereby improving the protection of the second thermal insulation layer 820 and further protecting the thermal insulation effect of the thermal insulation layer 800.

[0158] Further, referring to FIG. 18, the outer surface of the first end shell 130 is provided with two groups of second support portions 131, and the two groups of second support portions 131 and the first end shell 130 form a second limiting space 130a. The second limiting space 130a can guide the installation of the first sub-thermal insulation layer 800, improving the installation efficiency. Due to the presence of the second limiting space 130a, the first sub-thermal insulation layer 800 can be firmly limited in the second limiting space 130a, also increasing the stability of the overall structure.

[0159] Please continue to refer to FIG. 18, the second support portion 131 includes a first connecting portion 1311 and an intermediate portion 1312.

[0160] The first connecting portion 1311 can be attached to the outer surface of the first end shell 130 by welding or other methods, so that the entire first connecting portion 1311 has sufficient area in contact with the first end shell 130, ensuring that the first end shell 130 is uniformly stressed.

[0161] The intermediate part 1312 is connected to the first connecting part 1311 and extends along the first direction XX, and the intermediate part 1312, the first connecting part 1311 and the first end shell 130 surround the second limiting space 130a, wherein the intermediate part 1312 can be formed by bending the edge of the first connecting part 1311, so that the second limiting space 130a can be formed without other connection methods, and the bending method can also increase the strength of the second supporting part 131 to ensure the stability of the product.

[0162] Based on the fact that the first sub-insulation layer 800 and the second sub-insulation layer 800 can be quickly installed, in order to realize the quick installation of the third sub-insulation layer 800, please continue to refer to FIG. 18, the second supporting part 131 further includes a second connecting part 1313 connected to one side of the intermediate part 1312 away from the first connecting part 1311, the second connecting part 1313 is parallel to the first connecting part 1311, and the second connecting part 1313 and the intermediate part 1312 and the side shell 150 form a third limiting space 130b, the third limiting space 130b can guide the installation of the third sub-insulation layer, and can make the third sub-insulation layer fit the intermediate part 1312 and the second connecting part 1313, so as to be firmly limited in the third limiting space 130b, and also increase the stability of the overall structure.

[0163] Please continue to refer to FIG. 18, in the embodiment of the present application, the second supporting part 131 further includes a third connecting part 1314 connected to one side of the intermediate part 1312 of the second connecting part 1313, the third connecting part 1314 is parallel to the intermediate part 1312, the inner surface of the outer side shell 710 has a hanging part 7101, and the third connecting part 1314 is clamped with the hanging part 7101.

[0164] In order to improve the processing efficiency and reduce the manufacturing difficulty, please refer to FIGS. 19-20, the outer shell 700 includes a plurality of outer side shells 710, which are assembled and connected together, so that when the third connecting part 1314 is clamped with the hanging part 7101 of the outer side shell 710, the user does not need to hold it by hand, and the predetermined positioning of the outer side shell 710 can be realized, thereby facilitating the installation between the outer side shell 710 and the adjacent outer side shell 710, or other operations on the outer side shell 710.

[0165] Specifically, the third connecting part 1314 is a plate-shaped structure, and the hanging part 7101 forms a clamping groove, as shown in FIG. 18, so that the plate-shaped structure is clamped in the clamping groove. In some other embodiments, the third connecting part 1314 can form a clamping groove, and the hanging part forms a plate-shaped structure, which can also realize the clamping function, which will not be explained here.

[0166] Further, in order to further improve the installation efficiency between the two adjacent outer shells 710, please refer to FIGS. 19-20, the outer shell 710 comprises an outer shell body 711 and a first bending portion 712 bent from the outer shell body 711. The first bending portion 712 and the outer shell body 711 are configured as a right angle structure, and the first bending portion 712 of the adjacent outer shell 710 can abut against the outer shell body 711, and the outer shell body 711 of the adjacent outer shell 710 can abut against the first bending portion 712, thereby realizing the positioning of the adjacent outer shell 710, so that the two adjacent outer shells 710 are relatively stable, facilitating subsequent installation, and the first bending portion 712 of one of the two adjacent outer shells 710 is connected with the outer shell body 711 of the other outer shell 710 through a fastener 713.

[0167] Specifically, a bolt hole can be formed on the first bending portion 712 of one of the outer shells 710, and a bolt hole can also be formed on the outer shell body 711 of the adjacent outer shell 710, and a bolt passes through the corresponding bolt hole, thereby realizing the relative fixation of the two adjacent outer shells 710.

[0168] Based on the fact that the hardness of the second thermal insulation layer 820 is greater than that of the first thermal insulation layer 810, and the second thermal insulation layer 820 is easy to lose the thermal insulation effect under external force, in the embodiments of the present application, please refer to FIG. 19, the second thermal insulation layer 820 forms an avoidance area 820a corresponding to the first bending portion 712.

[0169] The avoidance area 820a extends along the first direction XX, which can give the installation position of the plurality of fasteners 713, so that the fastener 713 is difficult to contact the second thermal insulation layer 820, thereby improving the stability of the structure of the second thermal insulation layer 820.

[0170] Further, please continue to refer to FIG. 19, the first bending portion 712 of at least one of the two adjacent outer shells 710 is bent to form a second bending portion 714 away from the outer shell body 711, in the embodiments of the present application, the first bending portion 712 of one of the two adjacent outer shells 710 is bent to form a second bending portion 714 away from the outer shell body 711, the second bending portion 714 extends towards the avoidance area 820a and is arranged opposite to the fastener 713, the second bending portion 714 is a plate structure, and the contact area with the second thermal insulation layer is larger relative to the fastener 713, and the possibility of causing damage to the second thermal insulation layer 820 is lower when a collision occurs.

[0171] The second bending portion 714 can be one or multiple, and when the second bending portion 714 is multiple, it can correspond to multiple fasteners 713 one by one, which is specifically set according to the actual situation.

[0172] Please refer back to FIG. 1, FIG. 2 and FIG. 17, the outer surface of the outer bottom disc 730 has an outer support foot 7301, which can reduce the direct contact between the outer bottom disc 730 and the ground during the movement, transportation or placement of the heat storage device 1000, so as to avoid damage such as scratching, wearing or corrosion, which helps to protect the heat storage device 1000 and prolong the service life of the heat storage device 1000,

[0173] Please continue to refer to FIG. 17, in order to improve the structural strength of the outer bottom disc 730, in the embodiment of the application, the outer bottom disc 730 comprises an outer bottom disc plate body 731 and a vertical plate 732 formed by bending the outer bottom disc plate body 731, the vertical plate 732 is attached to the outer side shell 710, the bent vertical plate 732 can enhance the stability and rigidity of the entire outer bottom disc 730, in addition, since the vertical plate 732 is attached to the outer side shell 710, it can also absorb the impact force of the impact on the outer side shell 710, thereby improving the protection effect on the internal shell 100.

[0174] Along the first direction XX, the edge of the vertical plate 732 does not exceed the edge of the outer side shell 710, as shown in FIG. 17, which can make the overall appearance of the heat storage device 1000 more neat and beautiful, avoid visual discord caused by structural protrusion, and improve the overall quality of the product.

[0175] Based on the installation of the shell 100 and the outer shell 700, the external heat source needs to enter the heat exchange assembly 300 in the shell 100 to exchange heat with the heat storage material 200, and the utilization unit also needs to enter the heat exchange assembly 300 in the shell 100 to exchange heat with the heat storage material 200, so in the embodiment of the application, please refer back to FIG. 3 and FIG. 5, the shell 100 is provided with a pipe outlet 100c on the side close to the outer top cover 720 along the first direction XX, the pipe outlet 100c is configured to extend out of the pipe connected with the heat exchange assembly 300, in the application, four external pipes are respectively communicated with the corresponding charging inlet pipe 3211, charging outlet pipe 3212, discharging inlet pipe 3213 and discharging outlet pipe 3214, so as to realize the normal flow of the charging flow path 310a and the discharging flow path 310b.

[0176] The heat storage material 200 applied in the heat storage device 1000 is a phase change material, which can convert between solid and liquid or liquid and gas, resulting in a large temperature difference of the heat storage material 200 at different positions in the shell 100, therefore, in the embodiment of the application, please refer back to FIG. 6, the heat storage device 1000 further comprises a temperature sensing assembly 900, further, please refer to FIG. 21, the temperature sensing assembly 900 comprises a temperature sensing probe 910 and a wiring terminal 920 connected with the temperature sensing probe 910.

[0177] The temperature sensing probe 910 is arranged in the heat storage material 200 and can accurately monitor the temperature change of the heat storage material 200 in a specified area inside the heat storage device 1000 by being inserted into the heat storage material 200 by a preset depth, thereby guiding the operation logic of the entire heat storage device 1000.

[0178] Based on the fact that the temperature sensing probe 910 is arranged in the heat storage material 200, it is necessary to transmit signals or transmit power through the wiring terminal 920. In the embodiment of the present application, the shell 100 is provided with a wire arranging opening 100b on the side of the shell 100 close to the outer top cover 720 along the first direction XX, so that the external electric wire connected with the wiring terminal 920 can extend out of the shell 100 from the wire arranging opening 100b.

[0179] Since the wire arranging opening 100b and the pipe outlet opening 100c are both arranged on the same side of the shell 100, the entire heat storage device 1000 is more compact in structure and is also convenient for installation and wiring.

[0180] Further, referring back to FIG. 2, the installation space 700a is provided between the heat preservation layer 800 and the outer top cover 720, which can make the pipe connected with the manifold 321 extend out and can accommodate part of the external electric wire, so that the entire heat storage device 1000 looks like an integrated structure and is more beautiful. In order to facilitate the connection of the external electric wire with the external electric device, at least one of the plurality of outer side shells 710 and the outer top cover 720 is provided with a wire passing hole 700b which is in communication with the installation space 700a. Specifically, the wire passing hole 700b is provided on the outer side shell 710 or the outer top cover 720. The actual use condition can be set, and no more limitation is made here. Of course, the wire passing hole 700b can also be provided on both the outer side shell 710 and the outer top cover 720 to meet the needs of different users.

[0181] Please continue to refer to FIG. 1 and FIG. 3. At least one of the plurality of outer side shells 710 and the outer top cover 720 is further provided with a pipe passing hole 700c which is in communication with the installation space 700a. The pipe passing hole 700c is configured to allow the pipe connected with the heat exchange assembly 300 to extend out. The pipe passing hole 700c can be provided only on the outer side shell 710 or only on the outer top cover 720 or on both the outer side shell 710 and the outer top cover 720 to meet the needs of different users.

[0182] The embodiment of the present application also provides a heating and ventilation system. The heating and ventilation system can include an air conditioner, a multi-split air conditioner, a heat pump and other systems configured for heating. Specifically, referring to FIG. 21, the heating and ventilation system includes a heat source unit 2000, a first utilization unit 3000 and the above-mentioned heat storage device 1000.

[0183] The heat source unit 2000 is an external heat source. The heat storage device 1000 is in communication with the heat source unit 2000 through a charging circuit 2000a. The heat source exchanges heat with the heat storage material 200 when passing through the charging circuit 2000a. The heat storage device 1000 is in communication with the first utilization unit 3000 through a discharging circuit 3000a. The first utilization unit 3000 exchanges heat with the heat storage material 200 when passing through the discharging circuit 3000a.

[0184] Optionally, the heat source unit 2000 can include a main heat source unit and an auxiliary main heat source unit. Both the main heat source unit and the auxiliary main heat source unit can be in communication with the charging circuit 2000a and can transfer heat to the heat storage material 200 through the charging circuit 2000a.

[0185] The main heat source unit can include one of a solar heat collection module, a water source heat exchange module, and an air source heat exchange module. When conditions permit, the solar heat collection module, the water source heat exchange module, and the air source heat exchange module, and other more environmentally friendly natural energy sources are used to exchange heat with the heat storage material 200, thereby saving energy.

[0186] The auxiliary main heat source unit includes an electric heating module. When the main heat source unit is insufficient, the auxiliary heat source unit 2000 can provide energy to ensure the stability and continuity of heat energy supply.

[0187] In the present application, the heating system can further include a second utilization unit 4000. The heat source unit 2000 is in communication with the second utilization unit 4000 through a heat transfer pipeline 4000a. The heat transfer pipeline 4000a is parallel to the charging circuit 2000a.

[0188] The first utilization unit 3000 can be a water unit, such as a municipal water unit.

[0189] The second utilization unit 4000 can be a heating unit. The circulating medium in the heating unit can be a refrigerant. The refrigerant exchanges heat with the indoor environment to adjust the indoor temperature.

[0190] In this way, the system can more flexibly allocate and utilize heat energy. In the case where a large amount of hot water supply is not required, more heat energy can be directed to the heating unit, thereby improving the overall energy utilization efficiency.

[0191] The heating system also has a first working mode and a second working mode.

[0192] When the heating system is in the first working mode, the heat source unit 2000 can provide heat for the heat storage material 200, so that the water taking unit can absorb the heat stored by the heat storage material 200 to heat cold water, thereby providing hot water for users; when the heating system is in the second working mode, the heat source unit 2000 can provide heat for the refrigerant, so that the heating unit can be configured to adjust the indoor temperature.

[0193] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar parts; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore the terms describing the positional relationship in the drawings are only set as exemplary description, and cannot be understood as a limitation of the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0194] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0195] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar parts; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore the terms describing the positional relationship in the drawings are only set as exemplary description, and cannot be understood as a limitation of the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0196] The above is only the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat storage device, wherein, The application relates to a heat storage device, comprising: a shell, which is internally provided with a containing cavity, the containing cavity containing heat storage material and a heat exchange assembly at least partially embedded in the heat storage material, the heat exchange assembly comprising at least one heat exchange unit, the heat exchange unit comprising a plurality of heat exchange pipe columns embedded in the heat storage material, a plurality of heat exchange pipes of each column of the heat exchange pipes being arranged in a column along a first direction, and a plurality of the heat exchange pipe columns being arranged in a row along a second direction; wherein two adjacent columns of the heat exchange pipes comprise a plurality of first heat exchange pipes and a plurality of second heat exchange pipes; each two adjacent first heat exchange pipes are connected through a first bridge pipe, a plurality of first heat exchange pipes are sequentially connected through a plurality of first bridge pipes to form a charging flow path, and the charging flow path is connected with an external heat source to form a charging loop; each two adjacent second heat exchange pipes are connected through a second bridge pipe, a plurality of second heat exchange pipes are sequentially connected through a plurality of second bridge pipes to form a discharging flow path, the discharging flow path is connected with an external utilization unit to form a discharging loop, and a flow direction of the discharging flow path is opposite to that of the charging flow path; the heat storage material is defined with a center surface, the center surface divides the heat storage material into a front half and a rear half, the heat storage material of the front half is embedded with the first heat exchange pipe at the most upstream and the second heat exchange pipe at the most downstream of the charging flow path, the heat storage material of the rear half is embedded with the first heat exchange pipe at the most downstream and the second heat exchange pipe at the most upstream, the number of the first heat exchange pipes of the front half is less than that of the rear half, and the number of the second heat exchange pipes of the rear half is less than that of the first heat exchange pipes of the front half.

2. The thermal storage device of claim 1, wherein, The heat exchange assembly comprises: a plurality of heat exchange units, the plurality of heat exchange units being arranged in a row along the second direction; and a pipeline structure comprising a plurality of header pipes and a plurality of delivery pipes, the header pipes being located on the same side of the heat exchange unit as the first heat exchange pipe at the most upstream along the first direction, one end of the delivery pipe being connected with the header pipe, and the other end of the delivery pipe being connected with the corresponding charging flow path and discharging flow path.

3. The thermal storage device of claim 2, wherein, The heat exchange unit further comprises two side plates, the two side plates being arranged on two sides of the heat exchange unit along a third direction respectively; the heat storage device further comprises a gap maintainer, the gap maintainer being connected with the side plates of the plurality of heat exchange units, and the plurality of heat exchange units being sequentially arranged in a row along the second direction.

4. The thermal storage device of claim 3, wherein, The gap maintainer comprises: a first connecting member being located on the same side of the heat exchange unit as the first heat exchange pipe at the most downstream along the first direction, and the first connecting member comprising a first plate body and a plurality of first fixing portions arranged on the first plate body, the plurality of first fixing portions being arranged in a row along the second direction, and the first fixing portions being connected with the corresponding side plates; and a second connecting member being located on the same side of the heat exchange unit as the first heat exchange pipe at the most upstream along the first direction, and the second connecting member comprising a second plate body and a plurality of second fixing portions arranged on the second plate body, the plurality of second fixing portions being arranged in a row along the first direction, and the second fixing portions being connected with the corresponding side plates.

5. The thermal storage device of claim 4, wherein, The heat storage device further comprises a protective structure, which is located on the same side of the heat exchange unit as the most downstream first heat exchange pipe along the first direction, covers the first connecting piece, and is connected with the plurality of side plates, and the protective structure is protruded to the heat exchange unit along the third direction.

6. The thermal storage device of any one of claims 2 to 5, wherein, The heat storage device comprises a header fixing piece, which is installed on the heat exchange unit, and a plurality of mounting holes are arranged on the header fixing piece, and a plurality of headers are installed in the mounting holes.

7. The thermal storage device of claim 6, wherein, The heat storage device comprises two header fixing pieces, which are arranged on the opposite sides of the heat exchange assembly along the second direction, and the header fixing piece comprises a plate part and a plurality of mounting parts connected with the plate part, the plate part extends along the third direction, and the plurality of mounting parts are protruded to the heat exchange assembly along the second direction. The shell has two side shells arranged oppositely along the second direction, and a plurality of mounting matching parts are arranged on one side of each side shell facing the other side shell, and the plurality of mounting matching parts are connected with the corresponding plurality of mounting parts.

8. The thermal storage device of any one of claims 2 to 7, wherein, The plurality of headers comprise charging inlet pipes, charging outlet pipes, discharging inlet pipes and discharging outlet pipes, the charging inlet pipe is communicated with the most upstream first heat exchange pipe, the charging outlet pipe is communicated with the most downstream first heat exchange pipe, the discharging inlet pipe is communicated with the most upstream second heat exchange pipe, and the discharging outlet pipe is communicated with the most downstream second heat exchange pipe.

9. The thermal storage device of any one of claims 2 to 8, wherein, The pipeline structure further comprises a plurality of three-way pipes, one end of each three-way pipe is communicated with one conveying pipe, and the other two ends of each three-way pipe are communicated with two rows of heat exchange pipes of the corresponding heat exchange unit.

10. The thermal storage device of any one of claims 1 to 9, wherein, The plurality of rows of heat exchange pipes comprise at least one group of heat exchange pipe units, each heat exchange pipe unit comprises two adjacent rows of heat exchange pipes, and each row of heat exchange pipes in at least one group of heat exchange pipe units comprises a plurality of first heat exchange pipes and a plurality of second heat exchange pipes.

11. The thermal storage device of any one of claims 1 to 9, wherein, The plurality of rows of heat exchange pipes comprise at least one group of heat exchange pipe units, each heat exchange pipe unit comprises two adjacent rows of heat exchange pipes, one row of heat exchange pipes in at least one group of heat exchange pipe units comprises a plurality of first heat exchange pipes, and the other row of heat exchange pipes in at least one group of heat exchange pipe units comprises a plurality of second heat exchange pipes.

12. The thermal storage device of any one of claims 1 to 11, wherein, The heat storage device further comprises: An outer shell, the shell is arranged in the outer shell, the outer shell comprises a plurality of outer side shells, an outer top cover and an outer bottom disc, the outer top cover is arranged close to the most upstream side of the first heat exchange pipe along the first direction and connected to one side of the outer side shell, and the outer bottom disc is arranged close to the most downstream side of the first heat exchange pipe along the first direction and connected to the other side of the outer side shell opposite to the one side; An insulation layer attached to the outer surface of the shell, and the outer shell covers the outside of the insulation layer.

13. The thermal storage device of claim 12, wherein, The insulation layer comprises a first insulation layer and a second insulation layer, and the first insulation layer is closer to the shell than the second insulation layer. The hardness of the first insulation layer is less than that of the second insulation layer.

14. The thermal storage device of claim 13, wherein, The first insulation layer comprises at least one of a sponge layer and a rubber layer.

15. The thermal storage device of claim 13 or 14, wherein, The second thermal insulation layer comprises at least one of a vacuum thermal insulation panel and a polyurethane panel.

16. The thermal storage device of claim 14 or 15, wherein, An outer surface of the shell has a protrusion embedded in the first thermal insulation layer.

17. The thermal storage device of claim 16, wherein, The protrusion comprises a plate body and a standing edge bent from the plate body.

18. The thermal storage device of any one of claims 13 to 17, wherein, The shell comprises a first end shell, a second end shell and a side shell, the side shell surrounds the accommodation cavity, the first end shell covers a side of the accommodation cavity close to the outer top cover in the first direction, and the second end shell covers a side of the accommodation cavity close to the outer bottom disc in the first direction. The thermal storage material is filled in the accommodation cavity and spaced from the first end shell.

19. The thermal storage device of claim 18, wherein, An outer surface of the second end shell is provided with a first support portion supported on the outer bottom disc.

20. The thermal storage device of claim 19, wherein, The first support portion comprises: a first plate portion attached to an outer surface of the second end shell; two groups of first support legs arranged on edges of the first plate portion in a second direction and supported on a bottom wall of the outer shell; an edge of the first plate portion in a third direction has a second plate portion, the second plate portion, the first support legs and the first plate portion form a first limiting space, and part of the thermal insulation layer is located in the first limiting space.

21. The thermal storage device of claim 20, wherein, The first thermal insulation layer is at least partially located in the first limiting space, the second thermal insulation layer is located outside the first limiting space and attached to the first thermal insulation layer, and a gap is formed between a side of the second thermal insulation layer away from the first thermal insulation layer and the outer bottom disc.

22. The thermal storage device of any one of claims 18 to 21, wherein, An outer surface of the first end shell is provided with two groups of second support portions, and the second support portions and the first end shell form a second limiting space in which the thermal insulation layer is arranged.

23. The thermal storage device of claim 22, wherein, The second support portion comprises: a first connecting portion attached to an outer surface of the first end shell; an intermediate portion connected to the first connecting portion and extending in the first direction, and the intermediate portion, the first connecting portion and the first end shell surround the second limiting space.

24. The thermal storage device of claim 23, wherein, The second support portion further comprises: a second connecting portion connected to a side of the intermediate portion away from the first connecting portion, the second connecting portion is parallel to the first connecting portion, and the second connecting portion, the intermediate portion and the side shell form a third limiting space; the third limiting space is provided with the thermal insulation layer, and the thermal insulation layer is attached to the intermediate portion and the second connecting portion.

25. The thermal storage device of claim 24, wherein, The second support portion further comprises: a third connecting portion connected to a side of the intermediate portion away from the second connecting portion, the third connecting portion is parallel to the intermediate portion; an inner surface of the outer side shell has a hanging portion, and the third connecting portion is clamped with the hanging portion.

26. The thermal storage device of any one of claims 13 to 25, wherein, The outer side shell comprises an outer side shell body and a first bent portion bent from the outer side shell body, and the first bent portion of one of the two adjacent outer side shells is connected to the outer side shell body of the other of the two outer side shells by a fastener.

27. The thermal storage device of claim 26, wherein, The second thermal insulation layer forms an avoiding area corresponding to the first bent portion, and the avoiding area extends in the first direction.

28. The thermal storage device of claim 27, wherein, The first bending part of at least one of the outer side shells is bent to form a second bending part away from one side of the outer side shell body, the second bending part extends to the avoiding area and is arranged opposite to the fastener.

29. The thermal storage device of any one of claims 12 to 28, wherein, The outer bottom disc comprises an outer bottom disc plate body and a vertical plate bent from the outer bottom disc plate body, the vertical plate is attached to the outer side shell, and the edge of the vertical plate does not exceed the edge of the outer side shell in the first direction.

30. The thermal storage device of any of claims 12 to 29, wherein, The outer surface of the outer bottom disc has an outer supporting leg.

31. The thermal storage device of any one of claims 12 to 30, wherein, The shell has a wire arranging port and a pipe outlet port on one side close to the outer top cover in the first direction, the pipe outlet port is configured to extend the pipe connected with the heat exchange assembly; The heat storage device further comprises a temperature sensing assembly, the temperature sensing assembly comprises a temperature sensing probe and a terminal connected with the temperature sensing probe, the temperature sensing probe is arranged in the heat storage material, and the external wire connected with the terminal extends out of the shell from the wire arranging port.

32. The thermal storage device of claim 31, wherein, The mounting space is provided between the heat preservation layer and the outer top cover, the external wire passes through the heat preservation layer and extends to the mounting space, and at least one of the plurality of outer side shells and the outer top cover is provided with a wire passing hole in communication with the mounting space.

33. The thermal storage device of claim 32, wherein, At least one of the plurality of outer side shells and the outer top cover is further provided with a pipe passing hole in communication with the mounting space, and the pipe passing hole is configured to extend the pipe connected with the heat exchange assembly.

34. A heating and ventilation system wherein, Comprise: A heat source unit; A first utilization unit; And The heat storage device according to any one of claims 1-33, the heat storage device is in communication with the heat source unit through the charging circuit, and the heat storage device is in communication with the first utilization unit through the discharging circuit.

35. The heating system of claim 34, wherein, The heat source unit: A main heat source unit in communication with the heat storage device through the charging circuit, the main heat source unit comprises one of a solar heat collecting module, a water source heat exchange module and an air source heat exchange module; and An auxiliary heat source unit in communication with the heat storage device through the charging circuit, and the main heat source unit comprises an electric heating module.

36. The heating system of claim 34 or 35, wherein, Further comprising a second utilization unit, the heat source unit is in communication with the second utilization unit through a heat transfer pipe, and the heat transfer pipe is connected in parallel with the charging circuit.

37. The heating system of claim 36, wherein, The heating and ventilation system has: A first working mode, when the heating and ventilation system is in the first working mode, the heat source unit provides heat for the first utilization unit; and A second working mode, when the heating and ventilation system is in the second working mode, the heat source unit provides heat for the second utilization unit.

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