Regenerative bricks forming a spatial three-dimensional multi-parallel structure air duct system

Abstract

The present invention provides a heat storage brick for constructing a spatial three-dimensional multi-parallel air duct system, belonging to the technical field of heat storage. It includes horizontal grooves, horizontal convex teeth, vertical notches, anchoring notches, etc. By using two vertical notches located at diagonal positions respectively and orthogonal and communicating with the upper and lower two horizontal grooves, a true three-dimensional spatial air duct system is formed, with the air inlet channels and air outlet channels automatically parallel and staggered in space as the main air ducts and multiple horizontal channels along the way as parallel branches. At the same time, it has a baffle structure that is staggered and complementary in space, and the walls of the two horizontal grooves and two vertical notches of the heat storage brick are all heat exchange surfaces of the air duct, thereby achieving balanced inlet air temperature difference, increasing the heat exchange area, reducing the temperature gradient, promoting heat exchange flow, balancing the air duct pressure, etc., significantly reducing the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, and improving the heat storage capacity, heat absorption and release efficiency, and dynamic response performance.

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 multi-branch parallel structure wind path system, belonging to the field of heat storage technology. Background Art

[0002] As the basic building block of solid heat storage devices, heat storage bricks have a variety of mature application structures. However, after the current solid heat storage bricks form the entire heat storage device, the ventilation and heat dissipation duct formed is essentially a two-dimensional structure. The more typical and commonly used is the alternating orthogonal duct structure on the horizontal plane. Its characteristics are that each duct independently runs through the entire heat storage body and is completely isolated from each other. The heating wires are generally located in multiple groups of parallel channels. Obviously, such a structure will lead to a large temperature difference between the head and the tail of each heat exchange duct, and will also lead to problems such as excessive temperature difference of the heating wires in different channels.

[0003] There are also channels for installing the heating wire that are not used as air ducts and are closed on both sides, which will result in heat exchange between the closed space of the heating wire and the circulating air through the heat storage body. Obviously, such a structure will cause a large temperature difference between the closed space of the heating wire and the circulating air, and the temperature of the heating wire 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 is such that a portion of one surface of each heat storage brick generally exchanges heat with the electric heating wire, and a portion of the opposite surface exchanges heat with the gas in the heat exchange air duct. A thicker heat storage brick entity is located between two horizontally adjacent electric heating wire channels or heat exchange air ducts, and the heat exchange area is small. The temperature gradient inside the heat storage brick is large, resulting in an excessively large temperature difference inside the heat storage body.

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

[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 brick with a cross-shaped 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 segments to the hot air channel, which can only play a balancing role for adjacent hot air channels and cannot fully participate in the heat exchange process of the hot air channel. That is, different air inlet channels and air 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 the Chinese patent "Heat Storage Module (Application No.: 201720941653.9)", ridges or cross bars are arranged in the longitudinal grooves, and "the ridges or cross bars are horizontally, parallelly and evenly arranged", the purpose of which is to increase the heating (heat exchange) area, but the influence on gas flow is not considered, and it is difficult to form a turbulent flow effect that promotes heat exchange efficiency. 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 multi-parallel structure air duct system. Through the special structural design of the heat storage brick, a three-dimensional air duct system is established, in which multiple air inlet channels and air outlet channels are arranged in an interleaved manner to form the main air duct, and the horizontal channels form multi-branch parallel branches. It realizes functions such as balancing the inlet air temperature difference, increasing the heat exchange area, reducing the temperature gradient, promoting heat exchange flow, and balancing the air duct pressure, thereby 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 prolonging the service life of the heating wire. At the same time, it also has the advantages of simple structure, low cost, reliable operation, and convenient maintenance.

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

[0010] The heat storage brick that constitutes a spatial three-dimensional multi-parallel structure air duct system includes a first horizontal groove (1), a second horizontal groove (2), a first horizontal convex tooth (3), a second horizontal convex tooth (4), a first vertical notch (5), and a second vertical notch (6).

[0011] The heat storage brick is rectangular. The first horizontal groove (1) runs through the upper part in the horizontal direction, and the second horizontal groove (2) runs through the lower part in the horizontal direction, so that the first horizontal convex teeth (3) and the second horizontal convex teeth (4) which are parallel to each other and protrude up and down are formed on both sides respectively.

[0012] The first vertical notch (5) runs through the heat storage brick in the vertical direction, is orthogonal to the first horizontal convex tooth (3), and communicates with the first horizontal groove (1) and the second horizontal groove (2).

[0013] The second vertical notch (6) runs through the heat storage brick in the vertical direction, is orthogonal to the second horizontal convex tooth (4), and communicates with the first horizontal groove (1) and the second horizontal groove (2).

[0014] The first vertical notch (5) and the second vertical notch (6) are located at two diagonal positions of the heat storage brick.

[0015] Furthermore, the first vertical notch (5) and the second vertical notch (6) are rectangular, trapezoidal or semi-circular arc-shaped.

[0016] Furthermore, the junctions of the first vertical notch (5) and the second vertical notch (6) with the first horizontal groove (1) and the second horizontal groove (2) are of inclined surface or arc-shaped surface structure.

[0017] Furthermore, the upper parts of the first horizontal convex tooth (3) and the second horizontal convex tooth (4) respectively have anchoring notches (7), and the lower parts respectively have anchoring protrusions (8) that are meshed with the anchoring notches (7) correspondingly.

[0018] Furthermore, the inner surfaces of the first horizontal groove (1) and the second horizontal groove (2) are baffle structures (9) that are not parallel to the flow direction of the heated gas; and the baffle structures (9) in the first horizontal groove (1) and the baffle structures (9) in the second horizontal groove (2) form an interleaved complementary relationship in space.

[0019] Furthermore, when multiple heat storage bricks are combined and stacked into a heat storage body, the first vertical notch (5) and the second vertical notch (6) respectively form an air inlet channel (10) and an air outlet channel (11); and the air inlet channel (10) and the air outlet channel (11) can be arranged in the vertical direction or in the horizontal direction.

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

[0021] 1. The first vertical notch and the second vertical notch, which are located at diagonal positions respectively, can form multiple spatially parallel air inlet channels and air outlet channels when the solid heat storage bricks are stacked, and are communicated with two horizontal grooves of each solid heat storage brick; a true three-dimensional space duct system is formed with the air inlet channels and air outlet channels as the main air ducts and multiple horizontal channels along the way as parallel branches. It realizes balanced air inlet temperature difference, increased heat exchange area, reduced temperature gradient, promoted heat exchange flow, balanced air duct pressure, etc., thus significantly reducing the temperature difference between different heat storage bricks and different spatial parts of the same heat storage brick, and improving the heat storage capacity, heat absorption and heat release efficiency and dynamic response performance. At the same time, it also has the advantages of simple structure, low cost, reliable operation, convenient installation and maintenance, etc.

[0022] 2. Each heat storage brick has an air inlet channel and an air outlet channel as the main air ducts, which are automatically parallel and staggered in space, realizing relatively balanced air inlet and air outlet temperatures, and avoiding the large temperature difference caused by different air inlet and air outlet temperatures on each heat exchange surface.

[0023] 3. The walls of the first horizontal groove, the second horizontal groove, the first vertical notch and the second vertical notch of the heat storage brick are all heat exchange surfaces of the air duct, thus 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 heat release efficiency.

[0024] 4. The junction of the vertical groove 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, the baffle structures designed on the inner surfaces of the first horizontal groove and the second horizontal groove, which have a spatially staggered and complementary relationship and are not parallel to the flow direction of the heated gas, can form an obvious turbulent effect when stacked up and down, balance the pressure of the main air duct and each parallel branch channel, significantly improve the gas heat exchange efficiency, and effectively increase the radiation heat exchange area of the heating wire. Thus, the overall temperature difference is further reduced, and the heat absorption and heat release efficiency are improved.

[0025] 5. The anchoring notch at the upper part of the heat storage brick meshes with the anchoring protrusion at the lower part, realizing the anchoring of the upper and lower layers of heat storage bricks, facilitating construction positioning, accelerating the construction progress, and improving the overall stability.

[0026] 6. The upper and lower double-sided horizontal grooves make the heat storage brick a completely spatially symmetric structure. Then, by changing the spatial placement relationship of the same specification of heat storage bricks, various air duct structures can be easily formed. The main air duct can be vertically arranged or horizontally arranged, simplifying the heat storage brick structure, as well as the processing and installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Top view of the solid heat storage brick.

[0028] Figure 2 : Side view of the solid heat storage brick.

[0029] Figure 3 : Right view of the solid heat storage brick.

[0030] Figure 4 : Top view of the stacked solid heat storage bricks.

[0031] In the figure: 1 - First horizontal groove, 2 - Second horizontal groove, 3 - First horizontal convex tooth, 4 - Second horizontal convex tooth, 5 - First vertical notch, 6 - Second vertical notch, 7 - Anchoring notch, 8 - Anchoring protrusion, 9 - Baffle structure, 10 - Air inlet channel, 11 - Air outlet channel. Specific embodiments

[0032] The present invention will be further described in detail below with reference to the accompanying drawings:

[0033] As Figure 1 shown is the top view of the solid heat storage brick, Figure 2 shown is the side view of the solid heat storage brick, Figure 3 shown is the right view of the solid heat storage brick. The heat storage brick forming the spatial three-dimensional multi-parallel structure air duct system includes a first horizontal groove (1), a second horizontal groove (2), a first horizontal convex tooth (3), a second horizontal convex tooth (4), a first vertical notch (5), a second vertical notch (6), an anchoring notch (7), an anchoring protrusion (8), a baffle structure (9), an air inlet channel (10), and an air outlet channel (11).

[0034] Figure 1 , Figure 2 and Figure 3 In, the heat storage brick is rectangular. The first horizontal groove (1) runs through the upper part horizontally, and the second horizontal groove (2) runs through the lower part horizontally, thus forming the first horizontal convex tooth (3) and the second horizontal convex tooth (4) that are parallel to each other and protrude up and down on both sides respectively; the first vertical notch (5) runs through the heat storage brick vertically, is orthogonal to the first horizontal convex tooth (3), and communicates with the first horizontal groove (1) and the second horizontal groove (2); the second vertical notch (6) runs through the heat storage brick vertically, is orthogonal to the second horizontal convex tooth (4), and communicates with the first horizontal groove (1) and the second horizontal groove (2); the first vertical notch (5) and the second vertical notch (6) are located at two diagonal positions of the heat storage brick. The first vertical notch (5) and the second vertical notch (6) are rectangular.

[0035] Figure 2 and Figure 3Among them, the upper parts of the first horizontal convex teeth (3) and the second horizontal convex teeth (4) respectively have anchoring notches (7), and the lower parts respectively have anchoring protrusions (8) that engage with the anchoring notches (7) correspondingly. When two heat storage bricks are stacked vertically, the anchoring protrusions (8) of the upper heat storage brick engage with the anchoring notches (7) of the lower heat storage brick correspondingly for anchoring. Obviously, this structure prevents the upper and lower heat storage bricks from translating and effectively strengthens the overall structure of the heat storage body, facilitating construction positioning and accelerating the construction progress.

[0036] Figure 1 and Figure 2 Among them, the inner surfaces of the first horizontal groove (1) and the second horizontal groove (2) are provided with a baffle structure (9) that is not parallel to the flow direction of the heated gas; and the baffle structure (9) of the first horizontal groove (1) and the baffle structure (9) of the second horizontal groove (2) form an interlaced complementary relationship in space.

[0037] When two heat storage bricks are stacked vertically, the protruding parts in the baffle structure (9) of the upper heat storage brick and the recessed parts in the baffle structure (9) of the lower heat storage brick correspond vertically. The heated gas generally flows along a direction close to being parallel to the horizontal air duct formed by the second horizontal groove (2) of the upper heat storage brick and the first horizontal groove (1) of the lower heat storage brick being closed. Then, the baffle structure (9) that is not parallel to the flow direction of the heated gas can cause the flowing heated gas to form an obvious turbulent effect, balance the pressure in the main air duct and each parallel branch channel, significantly improve the air heat exchange efficiency, and if electric heating wires are installed in the said horizontal channel, it can also effectively increase the radiation heat exchange area of the electric heating wires, thereby further reducing the overall temperature difference and improving the heat absorption and heat release efficiency.

[0038] Figure 1 and Figure 2 Among them, when two heat storage bricks are stacked vertically, the second horizontal groove (2) of the upper heat storage brick and the first horizontal groove (1) of the lower heat storage brick will be closed to form a horizontal channel; the first vertical notches (5) of the two heat storage bricks communicate vertically, and the second vertical notches (6) communicate vertically, respectively forming an air inlet channel (10) and an air outlet channel (11). Thus, a true three-dimensional space solid air duct system is formed with the air inlet channel (10) and the air outlet channel (11) as the main air ducts and multiple horizontal channels along the way as parallel branches. It realizes balancing the air inlet temperature difference, increasing the heat exchange area, reducing the temperature gradient, promoting the heat exchange flow, and equalizing the air duct pressure, etc., thereby 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 heat release efficiency, and dynamic response performance. At the same time, it also has the advantages of simple structure, low cost, reliable operation, and convenient installation and maintenance.

[0039] Since the structure of the heat storage brick is a completely spatially symmetric structure, heat storage bricks of the same specification can be used to conveniently form various air duct structures by changing the spatial placement relationship, which simplifies the structure of the heat storage brick and also simplifies the processing and installation processes. A typical top view of stacked solid heat storage bricks is as shown in Figure 4 shown. As can be seen from Figure 4 , the air inlet channel (10) and the air outlet channel (11) are arranged vertically and are automatically parallel and staggered in space, realizing relatively balanced air inlet and outlet temperatures and avoiding large temperature differences caused by different air inlet and outlet temperatures on each heat exchange surface. Moreover, the vertically arranged air ducts can also make full use of the chimney effect to automatically promote the internal gas flow.

[0040] In addition, the heating wire is generally located in the horizontal channel of the heat storage brick. Obviously, in the spatial three-dimensional multi-parallel structure air duct system described above, the walls of the first horizontal groove, the second horizontal groove, the first vertical notch, and the second vertical notch of each heat storage brick are all heat exchange surfaces of the air duct, and the heating wire can also be incorporated into the air duct system. Thereby effectively increasing the heat exchange area, reducing the temperature difference in different spatial parts of the same heat storage brick, increasing the heat storage capacity and the heat absorption and release efficiency, and reducing the working temperature of the heating wire and increasing the service life of the heating wire.

[0041] 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 principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. The regenerator brick that constitutes the space three-dimensional multi-parallel structure air duct system is characterized in that: It includes a first horizontal groove (1), a second horizontal groove (2), a first horizontal convex tooth (3), a second horizontal convex tooth (4), a first vertical notch (5), and a second vertical notch (6); The heat storage brick is rectangular. The first horizontal groove (1) penetrates through the upper part in the horizontal direction, and the second horizontal groove (2) penetrates through the lower part in the horizontal direction, so that on both sides, a first horizontal convex tooth (3) and a second horizontal convex tooth (4) that are parallel to each other and protrude up and down are formed respectively; The first vertical notch (5) penetrates through the heat storage brick in the vertical direction, is orthogonal to the first horizontal convex tooth (3), and communicates with the first horizontal groove (1) and the second horizontal groove (2); The second vertical notch (6) penetrates through the heat storage brick in the vertical direction, is orthogonal to the second horizontal convex tooth (4), and communicates with the first horizontal groove (1) and the second horizontal groove (2); The first vertical notch (5) and the second vertical notch (6) are located at two diagonal positions of the heat storage brick; The first vertical notch (5) and the second vertical notch (6) are rectangular, trapezoidal or semi-circular arc-shaped; The junctions of the first vertical notch (5) and the second vertical notch (6) with the first horizontal groove (1) and the second horizontal groove (2) are of inclined surface or arc surface structure; On the upper parts of the first horizontal convex tooth (3) and the second horizontal convex tooth (4), there are respectively anchoring notches (7), and on the lower parts, there are respectively anchoring protrusions (8) that are engaged with the anchoring notches (7) correspondingly; The inner surfaces of the first horizontal groove (1) and the second horizontal groove (2) are of a baffle structure (9) that is not parallel to the flow direction of the heated gas; and the baffle structure (9) of the first horizontal groove (1) and the baffle structure (9) of the second horizontal groove (2) form an interlaced complementary relationship in space; When two heat storage bricks are stacked up and down, the second horizontal groove (2) of the upper heat storage brick and the first horizontal groove (1) of the lower heat storage brick will be closed to form a horizontal channel; the first vertical notches (5) of the two heat storage bricks are correspondingly connected up and down, and the second vertical notches (6) are correspondingly connected up and down, respectively forming an air inlet channel (10) and an air outlet channel (11).

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