Regenerative bricks constituting a spatial three-dimensional grid heat exchange air duct system

Abstract

The present invention provides a heat storage brick that constitutes a spatial three-dimensional grid heat exchange air duct system, belonging to the technical field of heat storage. It includes horizontal grooves, horizontal convex teeth, vertical notches, anchoring notches, etc. Orthogonal and connected horizontal grooves and vertical notches are adopted to form a cross-connected transverse and longitudinal spatial three-dimensional grid-shaped air duct system. The vertical air ducts are used as the main air ducts, which are distributed in a parallel and staggered manner in space to achieve relatively uniform vertical air inlet and vertical air outlet. The upper surface, lower surface and side surfaces of the heat storage brick are incorporated into the heat exchange air ducts, effectively increasing the heat exchange area. Thereby, the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick is significantly reduced, the heat storage capacity, the heat absorption and release efficiency, and the dynamic response performance are improved, and the electric heating wire channels are incorporated into the branch air duct system to reduce the temperature of the electric heating wire channels and improve the service life of the electric heating wires. At the same time, it also has the advantages of simple structure, convenient processing, and convenient installation and maintenance.

Description

Technical Field

[0001] The present invention relates to a heat storage brick, in particular to a solid heat storage brick capable of forming a three-dimensional space stereoscopic grid-shaped heat exchange air duct system. It belongs to the technical field of heat storage. Background Art

[0002] As the basic constituent unit of a solid heat storage device, the heat storage brick has various mature application structures. However, after the current solid heat storage bricks form the entire heat storage device, the air ducts formed for ventilation and heat dissipation are essentially two-dimensional structures. A relatively typical and commonly used structure is the air duct structure that is alternately orthogonal on the horizontal plane. Its characteristic is that each air duct independently penetrates the entire heat storage body and is completely isolated from each other. The heating wires are generally located in multiple groups of parallel channels among them. Obviously, such a structure will lead to problems such as a large temperature difference between the head and the tail of each heat exchange air duct, and a large temperature difference between the heating wires located in different channels.

[0003] There is also a situation where the channels where the heating wires are installed are not used as air ducts and are closed on both sides, which will also cause heat exchange between the closed space of the heating wires and the circulating air through the heat storage body. Obviously, such a structure will lead to a large temperature difference between the closed space of the heating wires and the circulating air, and the temperature of the heating wires will be higher.

[0004] In addition, the heat storage body is generally composed of multiple heat storage bricks stacked together. The heat storage brick structure in the prior art makes the local part of one surface of each heat storage brick exchange heat with the heating wires, and the local part of the opposite surface exchanges heat with the gas in the heat exchange air duct. There is a relatively thick solid body of the heat storage brick between the two adjacent heating wire channels or heat exchange air ducts horizontally. The heat exchange area is small, and the temperature gradient inside the heat storage brick is large, resulting in too large a temperature difference inside the heat storage body.

[0005] Too large a temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick will reduce the overall heat storage temperature, thereby reducing the heat storage capacity, affecting the heat absorption and heat release characteristics, reducing the efficiency and dynamic response performance of the heat storage system; the too high temperature of the closed space of the heating wires will also significantly reduce the service life of the heating wires, etc.

[0006] There are also heat storage bricks with side heat exchange channels. For example, in the Chinese patent "A Solid Valley Electric Energy Energy Storage Device (Application No.: 201710144051.5)", the traditional channel layout of the heat storage bricks with a cross-orthogonal upper and lower layer of the heating element channel and the hot air channel is adopted, and improvements are made on this basis. Vertical grooves are respectively provided on the four sides of the heat storage brick as ventilation holes, forming two vertical channels communicating with the heating element channel and two vertical channels communicating with the hot air channel, which increases the heat exchange area to a certain extent. However, in this design, the vertical channels are all connected in parallel in sections to the hot air channel, which can only play a role in balancing adjacent hot air channels and cannot fully participate in the heat exchange process of the hot air channel. That is, different inlet channels and outlet channels cannot be formed, and the air flow path during actual operation is unpredictable. The Chinese patent "A 10KV Solid Valley Electric Energy Energy Storage Device (Application No.: 201820311486.4)" also adopts a similar structure.

[0007] In addition, in terms of the anchoring of the heat storage bricks, in the Chinese patent "A Self-Anchoring Heat Storage Brick (Application No.: 201621233886.5)", self-anchoring blocks and self-anchoring notches that engage with each other are respectively provided on both sides of the heat storage brick. Although it helps with fixation, it is still a two-dimensional air duct structure; and a wavy inner surface is provided on the flue, but a structure parallel to the flue is adopted, making it difficult to form a turbulent flow effect that can promote sufficient heat exchange. Summary of the Invention

[0008] In order to solve the above technical problems, the purpose of the present invention is to provide a heat storage brick that constitutes a spatial three-dimensional grid heat exchange air path system. Through the special structural design of the heat storage brick, a three-dimensional grid-shaped air duct system including cross-connected horizontal and vertical directions is established throughout the heat storage body, significantly reducing the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, improving the heat storage capacity, heat absorption and release efficiency, and dynamic response performance, and incorporating the electric heating wire channel into the branch air duct system to reduce the temperature of the electric heating wire channel and improve the service life of the electric heating wire. At the same time, it also has the advantages of simple structure, convenient processing, and convenient installation and maintenance.

[0009] The technical solution adopted by the present invention to solve its technical problems is:

[0010] The heat storage brick that constitutes a spatial three-dimensional grid heat exchange air path system includes a horizontal groove (1), a first horizontal convex tooth (2), a second horizontal convex tooth (3), a first vertical notch (4), and a second vertical notch (5).

[0011] The heat storage brick is rectangular. The horizontal groove (1) runs through the bottom in the horizontal direction, and the two sides are respectively parallel first horizontal convex teeth (2) and second horizontal convex teeth (3).

[0012] The first vertical notch (4) penetrates the regenerative brick in the vertical direction, is orthogonal to the first horizontal convex tooth (2), and communicates with the horizontal groove (1).

[0013] The second vertical notch (5) penetrates the regenerative brick in the vertical direction, is orthogonal to the second horizontal convex tooth (3), and communicates with the horizontal groove (1).

[0014] The first vertical notch (4) and the second vertical notch (5) are symmetrically located on both sides of the horizontal groove (1) at the same end of the regenerative brick.

[0015] Furthermore, the first vertical notch (4) and the second vertical notch (5) are rectangular, trapezoidal or semi-circular arc-shaped.

[0016] Furthermore, the junction of the first vertical notch (4) and the second vertical notch (5) with the horizontal groove (1) is a bevel or arc-shaped surface structure.

[0017] Furthermore, it includes a horizontal anchoring notch (6), which forms an engaging and anchoring relationship with the protruding part formed by the first vertical notch (4) and the second vertical notch (5).

[0018] Furthermore, it includes a vertical anchoring protrusion (7) and a vertical anchoring notch (8). The vertical anchoring protrusions (7) are respectively located at the lower parts of the first horizontal convex tooth (2) and the second horizontal convex tooth (3), and the vertical anchoring notches (8) are respectively located at the upper parts of the first horizontal convex tooth (2) and the second horizontal convex tooth (3). The vertical anchoring protrusion (7) and the vertical anchoring notch (8) form a corresponding engaging and anchoring relationship.

[0019] Furthermore, the inner surface of the horizontal groove (1) has a baffle structure (9) that is not parallel to the flow direction of the heated gas.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. By using the first vertical notch and the second vertical notch, multiple spatially parallel vertical air ducts can be formed when the solid regenerative bricks are stacked in combination. Moreover, the horizontal groove of each solid regenerative brick communicates with two adjacent vertical air ducts, forming a real three-dimensional space grid-shaped air duct system. The vertical air ducts make full use of the chimney effect to automatically promote the internal gas flow; the heat inside the horizontal groove can be discharged through the vertical air ducts in a timely manner. Thus, the temperature difference between different regenerative bricks and different spatial parts of the same regenerative brick is significantly reduced, and the heat storage capacity, heat absorption and release efficiency, and dynamic response performance are improved. At the same time, it also has the advantages of simple structure, low cost, reliable operation, and convenient installation and maintenance.

[0022] 2. Multiple vertical air ducts are used as the main air ducts, which are distributed in a parallel and staggered manner in space, facilitating the flexible staggered distribution of the air inlet channel and the air outlet channel, realizing relatively balanced vertical air inlet and vertical air outlet, and avoiding large temperature differences caused by different air inlet temperatures on each heat exchange surface.

[0023] 3. It is convenient to flexibly realize various combined stacking methods with vertical air ducts, so that the upper surface, lower surface and side surface of the solid heat storage bricks are all incorporated into the heat exchange air ducts, effectively increasing the heat exchange area, reducing the temperature difference between different spatial parts of the same heat storage brick, and improving the heat storage capacity and heat absorption and release efficiency.

[0024] 4. The intersection of the vertical notch and the horizontal groove adopts an inclined surface or an arc surface structure, which can reduce the ventilation resistance of the horizontal branch; at the same time, a baffle structure that is not parallel to the flow direction of the heated gas is designed on the inner surface of the horizontal groove, which can effectively increase the radiation heat exchange area of the heating wire and form a turbulent flow to improve the air heat exchange efficiency. Thereby further reducing the overall temperature difference and improving the heat absorption and release efficiency.

[0025] 5. An anchoring notch corresponding to the horizontal convex teeth is adopted at the top of the solid heat storage brick. While using the horizontal convex teeth to form a horizontal channel, the anchoring of the upper and lower layers of solid heat storage bricks is realized, which is convenient for construction positioning, speeds up the construction progress, improves the overall stability, and simplifies the structure of the solid heat storage brick and the processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : Top view of the solid heat storage brick.

[0027] Figure 2 : Side view of the solid heat storage brick.

[0028] Figure 3 : Right view of the solid heat storage brick.

[0029] Figure 4 : Bottom view of the solid heat storage brick.

[0030] Figure 5 : Top view of the stacked solid heat storage bricks.

[0031] Figure 6 : Right view of the stacked solid heat storage bricks.

[0032] In the figure: 1 - horizontal groove, 2 - first horizontal convex tooth, 3 - second horizontal convex tooth, 4 - first vertical notch, 5 - second vertical notch, 6 - horizontal anchoring notch, 7 - vertical anchoring protrusion, 8 - vertical anchoring notch, 9 - baffle structure. DETAILED DESCRIPTION OF THE INVENTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings:

[0034] AsFigure 1 The top view of the solid heat storage brick is shown as follows, Figure 2 The side view of the solid heat storage brick is shown as follows, Figure 3 The right view of the solid heat storage brick is shown as follows, Figure 4 The bottom view of the solid heat storage brick is shown as follows. The heat storage brick forming the spatial three-dimensional grid heat exchange air duct system includes a horizontal groove (1), a first horizontal convex tooth (2), a second horizontal convex tooth (3), a first vertical notch (4), a second vertical notch (5), a horizontal anchoring notch (6), a vertical anchoring protrusion (7), a vertical anchoring notch (8), and a baffle structure (9).

[0035] Figure 1 , Figure 2 , Figure 3 and Figure 4 In, the heat storage brick is rectangular. The horizontal groove (1) runs through the bottom in the horizontal direction, with the first horizontal convex tooth (2) and the second horizontal convex tooth (3) parallel to each other on both sides; the first vertical notch (4) runs through the heat storage brick in the vertical direction, is orthogonal to the first horizontal convex tooth (2), and communicates with the horizontal groove (1); the second vertical notch (5) runs through the heat storage brick in the vertical direction, is orthogonal to the second horizontal convex tooth (3), and communicates with the horizontal groove (1); the first vertical notch (4) and the second vertical notch (5) are symmetrically located on both sides of the horizontal groove (1) at the same end of the heat storage brick.

[0036] Figure 1 , Figure 4 In, the horizontal anchoring notch (6) forms a meshing and anchoring relationship with the protruding part formed by the first vertical notch (4) and the second vertical notch (5).

[0037] Figure 2 , Figure 3 In, the vertical anchoring protrusions (7) are respectively located at the lower parts of the first horizontal convex tooth (2) and the second horizontal convex tooth (3), the vertical anchoring notches (8) are respectively located at the upper parts of the first horizontal convex tooth (2) and the second horizontal convex tooth (3), and the vertical anchoring protrusions (7) and the vertical anchoring notches (8) form corresponding meshing and anchoring relationships.

[0038] Figure 2 and Figure 4 In, the gas to be heated generally flows along a direction close to being parallel to the horizontal groove (1). The inner surface of the horizontal groove (1) has a baffle structure (9) that is not parallel to the flow direction of the gas to be heated, which can make the gas to be heated flowing through form turbulence, significantly improve the air heat exchange efficiency, and if an electric heating wire is installed in the horizontal groove (1), it can also increase the radiation heat exchange area of the electric heating wire, thereby further reducing the overall temperature difference and improving the heat absorption and heat release efficiency.

[0039] When using the heat storage bricks that make up the spatial three-dimensional grid heat exchange air duct system to form a heat storage body, various combined stacking structures can be formed. A typical top view of the stacked heat storage bricks is as shown in Figure 5 shown, and the corresponding right view of the stacked solid heat storage bricks is as shown in Figure 6 shown. As can be seen from Figure 5 , when arranging adjacent left and right heat storage bricks, a meshing and anchoring relationship is formed through the raised part formed by the horizontal anchoring notch (6) of the right heat storage brick and the first vertical notch (4) and the second vertical notch (5) of the left heat storage brick, so that there is no front-back displacement between adjacent left and right heat storage bricks. As can be seen from Figure 6 , when stacking adjacent upper and lower heat storage bricks, a corresponding meshing and anchoring relationship is formed through the vertical anchoring protrusion (7) of the upper heat storage brick and the vertical anchoring notch of the lower heat storage brick. Obviously, the structure of the heat storage bricks makes it impossible for the left and right and upper and lower heat storage bricks to have translational displacement, effectively strengthening and stabilizing the overall structure of the heat storage body, and facilitating on-site installation. Moreover, the original structure of the heat storage bricks is fully utilized to simplify the processing technology.

[0040] A typical spatial three-dimensional grid heat exchange air duct system composed of the heat storage bricks is as shown in Figure 5 and Figure 6 shown. As can be seen from Figure 5 , when arranging adjacent front and back heat storage bricks, the first vertical notch (4) of the front heat storage brick and the second vertical notch (5) of the back heat storage brick together form a vertical air duct; when arranging adjacent left and right heat storage bricks, their respective horizontal grooves (1) are connected together to form a horizontal air duct. Since the first vertical notch (4) and the second vertical notch (5) of each heat storage brick are both communicated with its horizontal groove (1), that is, the multiple vertical air ducts and multiple horizontal air ducts formed are all communicated. By setting multiple vertical air ducts as the main air inlet channels and the main air outlet channels respectively, the corresponding horizontal air ducts automatically become parallel branch channels. Thus, a spatial three-dimensional grid heat exchange air duct system is obtained. The vertical air ducts make full use of the chimney effect to automatically promote the internal gas flow; the heat inside the horizontal grooves can be discharged in time through the vertical air ducts.

[0041] Obviously, the vertical air duct formed by the first vertical notch (4) and the second vertical notch (5) is vertically oriented in space. In this specific embodiment, it is mainly to utilize the chimney effect; during the implementation process, in order to solve the overall layout problem, the vertical air duct is horizontally oriented in space, and most of the beneficial effects can also be achieved.

[0042] Figure 5Among them, multiple vertical air ducts are distributed in a parallel and staggered manner in space, enabling flexible staggered distribution of the air inlet channels and air outlet channels, achieving relatively balanced vertical air inlet and vertical air outlet, and avoiding large temperature differences caused by different air inlet temperatures on each heat exchange surface.

[0043] The heating wire is generally located in the horizontal groove (1) of the heat storage brick. Obviously, in the described three-dimensional space grid heat exchange air duct system, the upper surface, lower surface, part of the side surfaces of each heat storage brick, and the heating wire are all incorporated into the formed three-dimensional space grid heat exchange air duct system. Thereby, the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick is significantly reduced, the heat storage capacity, heat absorption and heat release efficiency, and dynamic response performance are improved, and the working temperature of the heating wire is reduced, and the service life of the heating wire is increased.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The heat storage brick that constitutes the spatial three-dimensional grid heat exchange air duct system is characterized in that: It includes a horizontal groove (1), a first horizontal convex tooth (2), a second horizontal convex tooth (3), a first vertical notch (4), and a second vertical notch (5); The heat storage brick is rectangular. The horizontal groove (1) runs through the bottom in the horizontal direction, and on both sides are the parallel first horizontal convex tooth (2) and the second horizontal convex tooth (3); The first vertical notch (4) runs through the heat storage brick in the vertical direction, is orthogonal to the first horizontal convex tooth (2), and communicates with the horizontal groove (1); The second vertical notch (5) runs through the heat storage brick in the vertical direction, is orthogonal to the second horizontal convex tooth (3), and communicates with the horizontal groove (1); The first vertical notch (4) and the second vertical notch (5) are symmetrically located on both sides of the horizontal groove (1) at the same end of the heat storage brick; When arranging adjacent front and rear heat storage bricks, the first vertical notch (4) of the front heat storage brick and the second vertical notch (5) of the rear heat storage brick together form a vertical air duct; when arranging adjacent left and right heat storage bricks, their horizontal grooves (1) are connected together to form a horizontal air duct; The first vertical notch (4) and the second vertical notch (5) are rectangular, trapezoidal or semi-circular arc-shaped; The junction of the first vertical notch (4) and the second vertical notch (5) and the horizontal groove (1) is of an inclined surface or arc surface structure; It includes a horizontal anchoring notch (6), which realizes a meshing and anchoring relationship with the protruding part formed by the first vertical notch (4) and the second vertical notch (5). The protruding part should be longer than the recessed part of the horizontal anchoring notch (6), leaving space for the first vertical notch (4) and the second vertical notch (5) to form a vertical air duct.

2. The heat storage brick that constitutes the spatial three-dimensional grid heat exchange air duct system according to claim 1 is characterized in that: It includes a vertical anchoring protrusion (7) and a vertical anchoring notch (8). The vertical anchoring protrusion (7) is respectively located at the lower parts of the first horizontal convex tooth (2) and the second horizontal convex tooth (3), and the vertical anchoring notch (8) is respectively located at the upper parts of the first horizontal convex tooth (2) and the second horizontal convex tooth (3). The vertical anchoring protrusion (7) and the vertical anchoring notch (8) form a corresponding meshing and anchoring relationship.

3. The heat storage brick that constitutes the spatial three-dimensional grid heat exchange air duct system according to claim 1 is characterized in that: The inner surface of the horizontal groove (1) has a baffle structure (9) that is not parallel to the flow direction of the heated gas.

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