CN220853253U - Heat storage device with storage-while-release function - Google Patents

Abstract

The utility model discloses a heat storage device with a function of storing and discharging simultaneously, which comprises a heat storage unit and a heat exchange channel matched with the heat storage unit. The structure can realize that the low-temperature medium and the high-temperature medium pass through the low-temperature heat exchange channel and the high-temperature heat exchange channel simultaneously, and in the process, the heat storage unit can store heat and release heat, and the synchronism of the heat storage process and the heat release process is realized.

Description

Heat storage device with storage-while-release function

Technical Field

The utility model relates to the technical field of heat storage devices, in particular to a heat storage device with a function of storing and discharging simultaneously.

Background

With the development of society, the shortage of resources makes people pay more and more attention to the effective utilization of resources, and more waste heat is collected and utilized by people. Particularly, with the development of heat storage materials, more and more waste heat is collected by people through the heat storage materials. The existing heat storage device generally consists of a heat storage material and a container, and meanwhile, the structure such as a pipeline is arranged to realize the medium passing and the heat exchange process and achieve the purposes of heat storage and heat exchange. When the heat storage device is used, only one heat exchange medium can be used for exchanging heat with the heat storage material at the same time, and the heat storage working condition and the heat release working condition are required to be separated in time, so that the problem that the heat storage and the heat release are synchronous in time cannot be solved by the existing heat storage device.

Disclosure of utility model

In order to solve the technical problems, the utility model provides a heat storage device with a function of storing and discharging simultaneously, which comprises a heat storage unit and a heat exchange channel matched with the heat storage unit.

The structure can realize that the low-temperature medium and the high-temperature medium pass through the low-temperature heat exchange channel and the high-temperature heat exchange channel simultaneously, and in the process, the heat storage unit can store heat and release heat, so that the synchronism of the heat storage process and the heat release process is realized, and the problem that the heat storage and the heat release of the heat storage device in the prior art are asynchronous is solved. As for the low temperature medium and the high temperature medium, there is no particular limitation, and a gaseous medium is preferable.

In one embodiment, the heat storage unit comprises a plurality of stacked heat storage blocks comprising a heat storage material, preferably the heat storage blocks comprise a heat storage housing and a heat storage material encapsulated within the heat storage housing; the plurality of heat storage blocks are arranged in a middle shell, and the middle shell is of a cavity structure with two open ends; at least one spacing rib is arranged on the upper end face and/or the lower end face of at least part of the heat storage blocks. A plurality of heat exchange channels are formed between the heat storage blocks and the wall or the interval ribs of the middle shell and/or between the heat storage blocks and the adjacent heat storage blocks; the heat exchange channels are separated by the interval ribs to form a plurality of channels, part of the channels form low-temperature heat exchange channels, and the rest of the channels form high-temperature heat exchange channels.

Further, the device also comprises a front shell and a rear shell which are respectively connected with the side walls of the openings at the two ends of the middle shell; the front shell encloses an opening at one end of the middle shell to form a front air chamber, and the rear shell encloses an opening at the other end of the middle shell to form a rear air chamber.

Further, a front vertical partition plate is arranged in the front air chamber, the front vertical partition plate divides the front air chamber into a front cold air chamber and a front hot air chamber, a rear vertical partition plate is arranged in the rear air chamber, and the rear vertical partition plate divides the rear air chamber into a rear cold air chamber and a rear hot air chamber.

Further, the front vertical partition plate and the rear vertical partition plate are arranged at two ends of the same spacing rib, and the spacing rib corresponding to the front vertical partition plate and the rear vertical partition plate divides the heat exchange channel into a low-temperature heat exchange channel and a high-temperature heat exchange channel; at least one front cold diaphragm plate and at least one front hot diaphragm plate are respectively arranged in the front cold air chamber and the front hot air chamber, and the front cold diaphragm plate and the front hot diaphragm plate divide the front cold air chamber and the front hot air chamber into a plurality of layers; at least one rear cold diaphragm plate and at least one rear hot diaphragm plate are respectively arranged in the rear cold air chamber and the rear hot air chamber, and the rear cold diaphragm plate and the rear hot diaphragm plate divide the rear cold air chamber and the rear hot air chamber into a plurality of layers; the multi-layer of the front cold air chamber, the low-temperature heat exchange channel and the multi-layer of the rear cold air chamber form an S-shaped low-temperature medium flow channel, and the front shell and/or the rear shell are/is provided with the low-temperature medium inlet and the low-temperature medium outlet and are respectively communicated with the low-temperature medium flow channel; the multi-layer of the front hot air chamber, the high-temperature heat exchange channel and the multi-layer of the rear hot air chamber form an S-shaped high-temperature medium flow channel, and the front shell and/or the rear shell are/is provided with the high-temperature medium inlet and the high-temperature medium outlet which are respectively communicated with the high-temperature medium flow channel.

The space between the heat storage block and the wall of the middle shell and/or the space between the heat storage blocks is divided into a low-temperature heat exchange channel and a high-temperature heat exchange channel by using the interval ribs, the low-temperature heat exchange channel and the high-temperature heat exchange channel are of a multi-layer structure, and the interval ribs are provided with a plurality of pieces on the basis of forming the cold and hot channels, so that the heat exchange area is increased, and the heat exchange efficiency is improved; the vertical partition plates and the transverse partition plates are arranged to divide the air chamber into multiple layers, and the multi-layer structure of the low-temperature heat exchange channel and the high-temperature heat exchange channel is combined to realize a medium flow channel close to an S shape, so that the trend of the medium close to the S shape is realized, and the heat exchange medium realizes the heat exchange to the greatest extent; further, the heat storage block is of a plurality of independent structures, the heat exchange effect is larger than that of a single heat storage source, and the heat exchange effect can be achieved to the greatest extent. Further, the positions of the front vertical partition plate, the rear vertical partition plate, the front cold transverse partition plate, the front hot transverse partition plate, the rear cold transverse partition plate and the rear hot transverse partition plate can be correspondingly adjusted according to actual needs, and after adjustment, various heat exchange channels can be obtained to adapt to different design requirements.

In one embodiment, the heat storage device is further provided with a flow guiding structure. The flow guiding structure reduces the flow resistance of the heat exchange medium, can realize the rapid flow of the heat exchange medium and realize better heat exchange effect.

Further, the flow guiding structures are arranged in the front cold air chamber, the front hot air chamber, the rear cold air chamber and the rear hot air chamber, and each flow guiding structure is arranged corresponding to one end of the heat storage block.

Further, the flow guiding structure is of a V-shaped structure, and an opening of the flow guiding structure is abutted against one end of the heat storage block.

In one embodiment, the flow guiding structure is a U-shaped structure, and an opening of the flow guiding structure is abutted against one end of the heat storage block.

Further, the heat storage block is abutted against the end part of the flow guiding structure to form a concave structure. Simultaneously, the open end of the flow guiding structure is abutted with the concave structure.

In one embodiment, the front cold diaphragm, the front hot diaphragm, the rear cold diaphragm, and the rear hot diaphragm are coupled to the flow directing structure.

In one embodiment, the low temperature medium inlet, the low temperature medium outlet, the high temperature medium inlet and the high temperature medium outlet are connected to pipes, respectively.

In one embodiment, a portion of the spacer rib is thickened to form a support rib. The arrangement of the supporting ribs can ensure the supporting strength of the spacing ribs and avoid crushing deformation of the spacing ribs.

In one embodiment, the outer side of the middle shell is provided with a plurality of reinforcing rib sheets.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a heat storage device of the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along B-B in FIG. 2;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 5 is a sectional view taken along the direction D-D in FIG. 2;

FIG. 6 is a sectional view taken along line E-E of FIG. 2;

fig. 7 is a schematic structural view of a heat storage block of the present utility model;

FIG. 8 is a schematic view of another flow guiding structure according to the present utility model;

The reference numerals in the drawings are as follows: 1-a low-temperature medium inlet; 2-cryogenic medium outlet; 3-a high-temperature medium inlet; 4-a high temperature medium outlet; 5-heat storage blocks; 6-middle shell; 7-spacing ribs; 8-a front housing; 9-a rear housing; 10-front vertical partition board; 11-a front cooling air chamber; 12-a front hot air chamber; 13-a rear vertical partition; 14-post cooling air chamber; 15-a post hot air chamber; 16-front cooling diaphragm plate; 17-front thermal diaphragm; 18-a post-cooling diaphragm; 19-a post heat diaphragm; 20-a diversion structure; 21-supporting ribs; 22-reinforcing rib sheets; 23-concave structure.

Detailed Description

The following is a clear and complete description of the present utility model, taken in conjunction with the accompanying drawings, and it is evident that the described embodiments are some, but not all, embodiments of the present utility model. Other embodiments of the utility model, which are encompassed by the present utility model, are within the scope of the utility model as would be within the skill of those of ordinary skill in the art without undue burden.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

The embodiment discloses a heat storage device that possesses function of putting simultaneously is stored up to the side, and it includes the heat storage unit and with heat transfer channel of heat storage unit complex promptly in the heat storage unit or heat storage unit side is through setting up the heat transfer channel, when having the medium to pass through, realizes the process of heat transfer. The heat exchange channels are divided into a low-temperature heat exchange channel and a high-temperature heat exchange channel, two ports of the low-temperature heat exchange channel are respectively connected with a low-temperature medium inlet 1 and a low-temperature medium outlet 2, two ports of the high-temperature heat exchange channel are respectively connected with a high-temperature medium inlet 3 and a high-temperature medium outlet 4, and through the inlets and the outlets, the heat storage device capable of simultaneously realizing the functions of simultaneously storing and releasing the low-temperature medium and the high-temperature medium through the heat exchange channels in the same time can be realized.

Specifically, as shown in fig. 1 to 7, the heat storage unit includes a plurality of heat storage blocks 5 stacked and placed, the shape of the heat storage blocks 5 is not particularly limited, preferably a cuboid shape, that is, a plurality of cuboid-shaped heat storage blocks 5 are stacked and placed, the heat storage blocks 5 include a heat storage shell and a heat storage material encapsulated in the heat storage shell, and the heat storage material may be a sensible heat storage material, a phase change heat storage material or a chemical heat storage material, which is not particularly limited herein. The stacked plurality of heat storage blocks 5 are arranged in a middle shell 6, and the middle shell 6 is of a cavity structure with two open ends, preferably rectangular pipe shape; at least one spacing rib 7 is arranged on the upper end face and/or the lower end face of at least part of the heat storage blocks 5; a plurality of heat exchange channels are formed between the heat storage blocks 5 and the wall or the interval ribs 7 of the middle shell 6 and/or between the heat storage blocks 5 and the adjacent heat storage blocks 5; the heat exchange channels are separated by the spacing ribs 7 to form a plurality of channels, part of the channels form low-temperature heat exchange channels, and the rest of the channels form high-temperature heat exchange channels.

Preferably, a space between the upper surface of the uppermost heat storage block 5 and the top wall of the middle housing 6 and a space between the lower surface of the lowermost heat storage block 5 and the bottom wall of the middle housing 6 and a space between two adjacent heat storage blocks 5 form a heat exchange channel; wherein, the upper surface and the lower surface of the uppermost heat storage block 5 are respectively provided with at least one vertical spacing rib 7, preferably a plurality of vertical spacing ribs 7, and the lower surface of the rest heat storage blocks 5 are provided with at least one vertical spacing rib 7, preferably a plurality of vertical spacing ribs 7, the height of the spacing ribs 7 is set, the heat storage blocks 5 are provided with the same number of the spacing ribs 7 arranged on each surface of the spacing ribs 7, and the arrangement structure is same, so that when the heat storage blocks 5 are stacked up and down, the upper and lower spacing ribs 7 are correspondingly arranged. The spacing ribs 7 are welded on the surface of the heat exchange block 5, and of course, the spacing ribs 7 can be arranged in other modes, and the material of the spacing ribs is austenitic chromium-nickel stainless steel or a thin metal material with high heat conductivity, namely, the spacing ribs 7 have high heat conductivity; further, part of the spacing ribs 7 are selected to be thicker to form the support ribs 21, preferably arranged at intervals to form a more uniform support spacing force and to increase the structural strength of the housing of the heat storage block 5. Meanwhile, the middle shell 6 and the heat storage block 5 are attached to each other.

More specifically, the device further comprises a front shell 8 and a rear shell 9 which are respectively connected with the side edges of the openings at the two ends of the middle shell 6, the connection mode is not particularly limited, in the embodiment, a plurality of bolt structures are arranged for connection through a flanging skirt, and the middle shell 6, the front shell 8 and the rear shell 9 are made of austenitic chrome-nickel stainless steel or metal materials with certain mechanical strength; the front shell 8 encloses an opening at one end of the middle shell 6 to form a front air chamber, and the rear shell 9 encloses an opening at the other end of the middle shell 6 to form a rear air chamber; a front vertical partition board 10 is arranged in the front air chamber, the front vertical partition board 10 divides the front air chamber into a front cold air chamber 11 and a front hot air chamber 12, a rear vertical partition board 13 is arranged in the rear air chamber, and the rear vertical partition board 13 divides the rear air chamber into a rear cold air chamber 14 and a rear hot air chamber 15; the front vertical partition plate 10 and the rear vertical partition plate 13 are arranged at two ends of the same spacing rib 7, the spacing rib 7 corresponding to the front vertical partition plate 10 and the rear vertical partition plate 13 divides the heat exchange channel into a low-temperature heat exchange channel and a high-temperature heat exchange channel, and the low-temperature heat exchange channel and the high-temperature heat exchange channel form a plurality of layers according to the number of the heat storage blocks 5; the front vertical partition plate 10 and the rear vertical partition plate 13 are welded on the inner walls of the front shell 8 and the rear shell 9 respectively, and when the front vertical partition plate 10 and the rear vertical partition plate 13 are respectively attached to two ends of the spacing ribs 7 arranged on the 1 row, a low-temperature medium channel and a high-temperature medium channel are respectively formed by taking the front vertical partition plate 10, the rear vertical partition plate 13 and the corresponding spacing ribs 7 as boundaries, and when the heat storage and heat release synchronicity is realized through different channels at the same time by using the low-temperature medium and the high-temperature medium; further, at least one front cold diaphragm 16 and at least one front hot diaphragm 17 are respectively arranged in the front cold air chamber 11 and the front hot air chamber 12, the front cold diaphragm 16 and the front hot diaphragm 17 divide the front cold air chamber 11 and the front hot air chamber 12 into a plurality of layers, and the front cold diaphragm 16 and the front hot diaphragm 17 are welded on the inner walls of the front vertical diaphragm 10 and the front shell 8; at least one rear cold diaphragm 18 and at least one rear hot diaphragm 19 are respectively arranged in the rear cold air chamber 14 and the rear hot air chamber 15, the rear cold diaphragm 18 and the rear hot diaphragm 19 divide the rear cold air chamber 14 and the rear hot air chamber 15 into a plurality of layers, the rear cold diaphragm 18 and the rear hot diaphragm 19 are welded on the inner walls of the rear vertical diaphragm 13 and the rear shell 9, in the embodiment, the number of the front cold diaphragm 16 and the front hot diaphragm 17 is 2, the number of the front cold diaphragm 18 and the rear hot diaphragm 19 is 1, but the number of the front cold diaphragm 16 and the front hot diaphragm 17 and the number of the rear cold diaphragm 18 and the rear hot diaphragm 19 are not particularly limited, and are determined according to specific design; the rear cold diaphragm 18 and the rear hot diaphragm 19 and the positions of the rear cold diaphragm 18 and the rear hot diaphragm 19 are preferably located at the end positions corresponding to the respective heat storage blocks 5, avoiding the corresponding spacing ribs 7; the multi-layer of the front cold air chamber 11, the low-temperature heat exchange channel and the multi-layer of the rear cold air chamber 14 form a low-temperature medium flow channel close to S, the front shell 8 and/or the rear shell 9 are provided with the low-temperature medium inlet 1 and the low-temperature medium outlet 2 which are respectively communicated with the low-temperature medium flow channel, and in the embodiment, the low-temperature medium inlet 1 and the low-temperature medium outlet 2 are formed on the front shell 8 and are positioned at the position of the front cold air chamber 11; the multiple layers of the front hot air chamber 12, the high temperature heat exchange channel and the multiple layers of the rear hot air chamber 15 form a high temperature medium flow channel close to S shape, the front shell 8 and/or the rear shell 9 are provided with the high temperature medium inlet 3 and the high temperature medium outlet 4, and are respectively communicated with the high temperature medium flow channel, in the embodiment, the high temperature medium inlet 3 and the high temperature medium outlet 4 are formed on the front shell 8 and are positioned at the position of the front hot air chamber 12; the low-temperature heat exchange channels in the low-temperature medium flow channels and the high-temperature heat exchange channels in the high-temperature medium flow channels include at least one layer, preferably a plurality of layers, such as 2 layers, set according to the number of the heat storage blocks 5 and the numbers of the front cold and hot diaphragms 16 and 17 and the rear cold and hot diaphragms 18 and 19.

Further, the front cold air chamber 11, the front hot air chamber 12, the rear cold air chamber 14 and the rear hot air chamber 15 are internally provided with a flow guiding structure 20, and the flow guiding structure is not limited, in this embodiment, the flow guiding structure 20 is welded on the front vertical partition 10 and the rear vertical partition 13, and of course, in order to achieve further sealing, may also be partially welded on the front casing 8 and the rear casing 9, each flow guiding structure 20 is disposed corresponding to one end of the heat storage block 5, and is preferably a simple V-shaped structure (as shown in fig. 2), an opening of the flow guiding structure is abutted to one end of the heat storage block 5, and in order to achieve the effect of reducing the medium channeling after the abutting, the end of the heat storage block 5 abutted to the flow guiding structure 20 forms a concave structure 23, as shown in fig. 7, and meanwhile, an opening end of the flow guiding structure 20 is naturally abutted to the concave structure 23. For simplicity of construction, the front cold diaphragm 16, the front hot diaphragm 17, the rear cold diaphragm 18 and the rear hot diaphragm 19 are connected, preferably welded, to the flow guiding structure 20.

The flow guiding structure 20 may also have a U-shaped structure (as shown in fig. 8), and may also have a structure similar to the U-shaped structure, such as an arc-shaped structure.

Further, the low-temperature medium inlet 1, the low-temperature medium outlet 2, the high-temperature medium inlet 3 and the high-temperature medium outlet 4 are respectively connected with a pipeline.

Further, a plurality of reinforcing rib pieces 22 are provided on the outer side surface of the middle case 5.

The application process of the utility model is as follows:

The low-temperature medium inlet 1 and the high-temperature medium inlet 3 are connected with a low-temperature medium source and a high-temperature medium source respectively, at the moment, a low-temperature mechanism and a high-temperature medium flow channel respectively pass through the low-temperature medium flow channel and the high-temperature medium flow channel, and after heat exchange, respectively flow out of the low-temperature medium outlet 2 and the high-temperature medium outlet 4, so that the corresponding heat exchange process is realized, and the heat storage and the heat release are simultaneously carried out.

It is apparent that some of the structures of the present utility model, such as the parts welded to the front and rear cases 8 and 9, are formed integrally in a modularized form, so that the present utility model is more convenient and practical to install and maintain and replace. In addition, the low temperature medium flow channel and the high temperature medium flow channel formed by the utility model are not necessarily completely sealed channels, and partial structures may have the possibility of slight gas leakage, but the effect of the utility model is not affected.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (12)

1. The utility model provides a possess heat accumulation device of function is put to side store up, include the heat storage unit and with heat storage unit complex heat transfer passageway, its characterized in that, the heat transfer passageway is separated into low temperature heat transfer passageway and high temperature heat transfer passageway, low temperature medium import and low temperature medium export are connected respectively to low temperature heat transfer passageway's both ends mouth, high temperature medium import and high temperature medium export are connected respectively to high temperature heat transfer passageway's both ends mouth.

2. The heat storage device of claim 1, wherein the heat storage unit comprises a plurality of stacked heat storage blocks comprising a heat storage material; the plurality of heat storage blocks are arranged in a middle shell, and the middle shell is of a cavity structure with two open ends; at least one spacing rib is arranged on the upper end face and/or the lower end face of at least part of the heat storage blocks.

3. The heat storage device according to claim 2, wherein spaces between the heat storage blocks and walls or spacing ribs of the middle housing and/or between a heat storage block and an adjacent heat storage block form a plurality of heat exchange channels; the heat exchange channels are separated by the interval ribs to form a plurality of channels, part of the channels form low-temperature heat exchange channels, and the rest of the channels form high-temperature heat exchange channels.

4. The heat storage device according to claim 3, further comprising a front case and a rear case connected to both end opening side walls of the middle case, respectively; the front shell encloses an opening at one end of the middle shell to form a front air chamber, and the rear shell encloses an opening at the other end of the middle shell to form a rear air chamber.

5. The heat storage device of claim 4, wherein a front vertical partition is disposed in the front plenum, the front vertical partition divides the front plenum into a front cold plenum and a front hot plenum, a rear vertical partition is disposed in the rear plenum, and the rear vertical partition divides the rear plenum into a rear cold plenum and a rear hot air plenum.

6. The heat storage device according to claim 5, wherein the front vertical partition plate and the rear vertical partition plate are provided corresponding to both ends of the same partition rib, and the partition rib corresponding to the front vertical partition plate and the rear vertical partition plate partitions the heat exchange passage into a low temperature heat exchange passage and a high temperature heat exchange passage; at least one front cold diaphragm plate and at least one front hot diaphragm plate are respectively arranged in the front cold air chamber and the front hot air chamber, and the front cold diaphragm plate and the front hot diaphragm plate divide the front cold air chamber and the front hot air chamber into a plurality of layers; at least one rear cooling diaphragm plate and at least one rear heating diaphragm plate are respectively arranged in the rear cooling air chamber and the rear hot air chamber; the rear cooling diaphragm plate and the rear heating diaphragm plate divide the rear cooling air chamber and the rear hot air chamber into a plurality of layers respectively; the multi-layer of the front cold air chamber, the low-temperature heat exchange channel and the multi-layer of the rear cold air chamber form an S-shaped low-temperature medium flow channel, and the front shell and/or the rear shell are/is provided with the low-temperature medium inlet and the low-temperature medium outlet and are respectively communicated with the low-temperature medium flow channel; the multi-layer of the front hot air chamber, the high-temperature heat exchange channel and the multi-layer of the rear hot air chamber form an S-shaped high-temperature medium flow channel, and the front shell and/or the rear shell are/is provided with the high-temperature medium inlet and the high-temperature medium outlet which are respectively communicated with the high-temperature medium flow channel.

7. The heat storage device of claim 6, further comprising a flow directing structure disposed within the heat storage device.

8. The heat storage device of claim 7, wherein the plurality of flow guiding structures are disposed in the front cold air chamber, the front hot air chamber, the rear cold air chamber, and the rear hot air chamber, each flow guiding structure being disposed corresponding to one end of the heat storage block.

9. The heat storage device of claim 8, wherein the front cold diaphragm, the front hot diaphragm, the rear cold diaphragm, and the rear hot diaphragm are connected to the flow directing structure.

10. The heat storage device according to any one of claims 7-9, wherein the heat storage block forms a concave structure against an end of the flow guiding structure.

11. The heat storage device of any one of claims 7-9, wherein a portion of the spacer rib is thickened to form a support rib.

12. The heat storage device of any one of claims 7-9, wherein the outer side of the middle housing is provided with a plurality of stiffener pieces.