Heat storage device and heating and ventilation system

Abstract

The invention discloses a heat storage device and a heating and ventilation system, and relates to the technical field of heat exchange, a phase change material is arranged in a shell, a heat exchange pipeline structure is arranged in the phase change material, and the second ends of two heat storage flow paths are communicated through a first bridging pipe, so that hot fluid can flow in from the first end of one heat storage flow path, and the heat exchange pipeline structure is arranged in the phase change material; the heat flow flows into the second end of the other heat storage flow path from the second end of one heat storage flow path through the first bridging pipe and finally flows out of the first end of the other heat storage flow path, and the second ends of the two heat release flow paths are communicated through the second bridging pipe; the flow path of the cold fluid in the heat release flow path is similar to the flow path of the hot fluid in the heat storage flow path and is not repeated here, so that a connecting pipe extending from the first end to the second end of the heat exchange pipeline structure does not need to be arranged, the length of the connecting pipe can be reduced, and the material cost is saved; and the risk of deformation of the pipeline in the installation process can be reduced.

Description

Technical Field

[0001] This application relates to the field of heat exchange technology, and more particularly to a heat storage device and a heating, ventilation and air conditioning system. Background Technology

[0002] Currently, phase change thermal energy storage devices typically include a heat storage path and a heat release path, both of which are immersed in a phase change material. The heat storage path is directly connected to a heat pump system to transfer heat to the phase change material, while the heat release path is connected to domestic water supply to absorb heat from the phase change material and heat the water for user use.

[0003] In related technologies, to facilitate the filling of phase change materials, the heat exchanger is arranged perpendicular to the ground along the fin direction, allowing the phase change material to flow downwards along the fins by gravity. The input and output pipes are located on the side of the heat exchanger, and are then connected to the top of the heat exchanger to a main heat storage / release pipe.

[0004] However, the input and output pipes need to span the entire height of the heat exchanger, extending from the bottom of the heat exchanger to the main pipe at the top of the heat exchanger. This results in longer input and output pipes, which not only increases the amount of pipe material used and drives up material costs, but also makes the pipes more prone to deformation during installation, thus increasing the difficulty of installation. Summary of the Invention

[0005] This application provides a heat storage device and a heating and ventilation system that can solve the technical problem of long input and output pipes of heat exchangers.

[0006] In a first aspect, embodiments of this application provide a heat storage device, which includes:

[0007] A housing, the interior of which is provided with a phase change material;

[0008] The heat exchange pipeline structure is located inside the shell and has multiple heat storage flow paths and multiple heat release flow paths. The multiple heat release flow paths and multiple heat storage flow paths are alternately arranged in the phase change material along a first direction. The heat storage flow paths are used to transfer heat to the phase change material for storage, and the heat release flow paths are used to absorb the heat stored in the phase change material.

[0009] The connecting pipeline structure has a heat storage inlet and a heat storage outlet connected to the heat storage flow path, and a heat release inlet and a heat release outlet connected to the heat release flow path, wherein the heat storage inlet, the heat storage outlet, the heat release inlet and the heat release outlet are all located at the first end of the heat exchange pipeline structure.

[0010] A bridging structure is located at the second end of the heat exchange pipeline structure. The bridging structure includes a first bridging connector and a second bridging connector. Two adjacent heat storage flow paths are connected through the first bridging connector and are respectively connected to the heat storage inlet and the heat storage outlet. Two adjacent heat release flow paths are connected through the second bridging connector and are respectively connected to the heat release inlet and the heat release outlet.

[0011] In some embodiments, the heat exchange pipeline structure includes heat exchange tubes, a plurality of heat exchange tubes are arranged along the first direction, and one of two adjacent heat exchange tubes defines the heat storage flow path, and the other of two adjacent heat exchange tubes defines the heat release flow path.

[0012] In some embodiments, the heat exchange tube is a finned tube, and the heat exchange tube has multiple fins arranged along its extension.

[0013] In some embodiments, the heat exchange tube of the heat storage flow path is defined as an aluminum tube, and the heat exchange tube of the heat release flow path is defined as a stainless steel tube.

[0014] In some embodiments, the plurality of heat exchange tubes include a first heat exchange tube, a second heat exchange tube, a third heat exchange tube, and a fourth heat exchange tube arranged sequentially along the first direction. The first heat exchange tube and the third heat exchange tube are connected through a first bridge tube, and the second heat exchange tube and the fourth heat exchange tube are connected through a second bridge tube.

[0015] In some embodiments, the connecting conduit structure includes:

[0016] The heat storage manifold has two heat storage manifolds disposed at the first end of the heat exchange pipeline structure. One heat storage manifold has the heat storage inlet and is connected to a portion of the multiple heat storage flow paths. The other heat storage manifold has the heat storage outlet and is connected to another portion of the multiple heat storage flow paths.

[0017] Two heat release manifolds are disposed at the first end of the heat exchange pipeline structure. One heat release manifold has a heat release inlet and is connected to a portion of the multiple heat release flow paths. The other heat release manifold has a heat release outlet and is connected to another portion of the multiple heat release flow paths.

[0018] In some embodiments, the connecting pipeline structure further includes a first connecting branch pipe, one end of which is connected to the heat storage manifold or the heat release manifold, and the other end of which is connected to the first end of the heat exchange pipeline structure.

[0019] Wherein, one end of the first connecting branch pipe is connected to the heat storage manifold, and the other end of the first connecting branch pipe is connected to the heat storage flow path; or...

[0020] One end of the first connecting branch pipe is connected to the heat release manifold, and the other end of the first connecting branch pipe is connected to the heat release flow path.

[0021] In some embodiments, the connecting piping structure also includes...

[0022] A pipeline support plate is disposed at the first end of the heat exchange pipeline structure;

[0023] Pipeline limiting plates, a plurality of pipeline limiting plates are arranged along the first direction on the pipeline support plate, and each pipeline limiting plate includes a plurality of limiting parts, the plurality of limiting parts are arranged along the first direction, and the limiting parts are used to limit the first connecting branch pipe.

[0024] In some embodiments, the heat storage flow path includes a first heat storage branch path and a second heat storage branch path distributed along a second direction, the second direction intersecting with the first direction, and the second ends of two adjacent first heat storage branch paths are connected through a first bridge pipe, the first ends of two adjacent first heat storage branch paths are respectively connected to the heat storage inlet and the heat storage outlet, and the second ends of two adjacent second heat storage branch paths are connected through the first bridge pipe, and the first ends of two adjacent second heat storage branch paths are respectively connected to the heat storage inlet and the heat storage outlet; the heat release flow path includes a first heat release branch path and a second heat release branch path distributed along the second direction, and the second ends of two adjacent first heat release branch paths are connected through a second bridge pipe, the first ends of two adjacent first heat release branch paths are respectively connected to the heat release inlet and the heat release outlet, and the second ends of two adjacent second heat release branch paths are connected through a second bridge pipe, and the first ends of two adjacent second heat release branch paths are respectively connected to the heat release inlet and the heat release outlet.

[0025] In some embodiments, the connecting pipeline structure further includes multiple tee connectors, multiple second connecting branch pipes, and multiple third connecting branch pipes. The first port of the tee connector is connected to the heat storage inlet or the heat storage outlet, and the second port of the tee connector is connected to the first heat storage branch path via the second connecting branch pipe. The third port of the tee connector is connected to the second heat storage branch path via the third connecting branch pipe. Alternatively, the first port of the tee connector is connected to the heat release inlet or the heat release outlet, and the second port of the tee connector is connected to the first heat release branch path via the second connecting branch pipe. The third port of the tee connector is connected to the second heat release branch path via the third connecting branch pipe.

[0026] In some embodiments, the flow path lengths of the first heat storage branch and the first heat release branch are both a, the flow path lengths of the second heat storage branch and the second heat release branch are b, the pipe length of the second connecting branch is L1, and the pipe length of the third connecting branch is L2. a, b, L1 and L2 satisfy: a + L1 = b + L2.

[0027] In some embodiments, the housing includes an outer shell and an inner shell disposed inside the outer shell, the inner shell having the receiving cavity, the heat exchange pipeline structure disposed in the receiving cavity, and the receiving cavity containing the phase change material.

[0028] In some embodiments, the housing further includes an insulation layer disposed between the inner housing and the outer housing.

[0029] Secondly, embodiments of this application provide a heating, ventilation, and air conditioning system, characterized in that it includes a heat source module, a water utilization unit, and a heat storage device as described above. The heat source module is connected to the heat storage flow path to transfer heat to the phase change material through the heat storage flow path, and the water utilization unit is connected to the heat release flow path to transfer heat to the water utilization unit through the heat release flow path.

[0030] In some embodiments, the heat source module includes a main heat source unit and an auxiliary heat source unit, both of which are connected to the heat storage flow path. The main heat source unit includes one of a solar thermal collector module, a water source heat exchange module, and an air source heat exchange module, and the auxiliary heat source unit includes an electric heating module.

[0031] In some embodiments, the HVAC system further includes a temperature control module, which is connected in parallel with the heat storage device and shares the heat source module. The temperature control module is used to control the indoor temperature.

[0032] In some embodiments, the HVAC system has:

[0033] In the first operating mode, when the HVAC system is in the first operating mode, the heat source module provides heat to the water utilization unit; and

[0034] In the second operating mode, when the HVAC system is in the second operating mode, the heat source module provides heat to the temperature control module.

[0035] A heat storage device and a heating and ventilation system based on the embodiments of this application have at least the following beneficial effects:

[0036] By incorporating a phase change material inside the shell and embedding the heat exchange piping structure within it, the heat storage and heat release flow paths of the heat exchange piping structure can exchange heat with the phase change material. The connecting piping structure has a heat storage inlet, a heat storage outlet, a heat release inlet, and a heat release outlet, all located at the first end of the heat exchange piping structure. A bridging structure is located at the second end of the heat exchange piping structure. The first and second ends of the heat exchange piping structure are positioned opposite each other. The second ends of two adjacent heat storage flow paths are connected via a first bridging connector, and the first ends of two adjacent heat storage flow paths are respectively connected to the heat storage inlet and the heat storage outlet. Similarly, the second ends of two adjacent heat release flow paths are connected via a second bridging connector, and the first ends of two adjacent heat release flow paths are connected via a second bridging connector. The first end of the circuit is connected to the heat release inlet and the heat release outlet respectively; thus, when hot fluid flows into the first end of a heat storage circuit, the hot fluid can flow from the second end of one heat storage circuit to the second end of another heat storage circuit through the first bridge connector, and then flow out from the first end of the other heat storage circuit, forming a heat storage loop. Similarly, when cold fluid flows into the first end of a heat release circuit, the cold fluid can flow from the second end of one heat release circuit to the second end of another heat release circuit through the second bridge connector, and then flow out from the first end of the other heat release circuit, forming a heat release loop. Therefore, there is no need to install a connecting pipe extending from the first end to the second end of the self-heat exchange pipeline structure, which can reduce the length of the connecting pipe, save material costs, and also reduce the risk of deformation of the pipeline during installation. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A simplified structural diagram of the first type of heat storage device provided in the embodiments of this application;

[0039] Figure 2A three-dimensional structural diagram of the first heat exchange pipeline structure provided in the embodiments of this application;

[0040] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0041] Figure 4 A side view of the first heat exchange pipeline structure provided in the embodiments of this application;

[0042] Figure 5 A front view of the first heat exchange pipeline structure provided in the embodiments of this application;

[0043] Figure 6 for Figure 2 Enlarged structural diagram at point B;

[0044] Figure 7 A top view of the first heat exchange pipeline structure provided in the embodiments of this application;

[0045] Figure 8 This is a schematic diagram of the structure of the pipeline support plate and the pipeline limiting plate provided in the embodiments of this application;

[0046] Figure 9 A simplified structural diagram of the second type of heat storage device provided in the embodiments of this application;

[0047] Figure 10 This is a three-dimensional structural diagram of the second heat exchange pipeline structure provided in the embodiments of this application;

[0048] Figure 11 A side view of a second heat exchange pipeline structure provided in an embodiment of this application;

[0049] Figure 12 for Figure 10 Enlarged structural diagram at point C;

[0050] Figure 13 for Figure 10 Enlarged structural diagram at point D;

[0051] Figure 14 for Figure 10 Enlarged structural diagram at point E;

[0052] Figure 15 A front view of the second heat exchange pipeline structure provided in the embodiments of this application;

[0053] Figure 16 A top view of the second heat exchange pipeline structure provided in the embodiments of this application;

[0054] Figure 17 This is a schematic diagram of the structure of a heating, ventilation, and air conditioning system provided in an embodiment of this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 100. Heat storage device; 10. Shell; 20. Phase change material; 30. Heat exchange pipeline structure; 301. Heat storage flow path; 3011. First heat storage branch path; 3012. Second heat storage branch path; 302. Heat release flow path; 3021. First heat release branch path; 3022. Second heat release branch path; 303. Heat exchange tube; 3031. First heat exchange tube; 3032. Second heat exchange tube; 3033. Third heat exchange tube; 3034. Fourth heat exchange tube; 40. Connecting pipeline structure; 401. Heat storage manifold; 4011. 4012 Heat storage inlet; 402 Heat storage outlet; 402 Heat release manifold; 4021 Heat release inlet; 4022 Heat release outlet; 403 First connecting branch pipe; 404 Pipe support plate; 405 Pipe limiting plate; 4051 Limiting part; 406 Tee connector; 407 Second connecting branch pipe; 408 Third connecting branch pipe; 50 Bridging structure; 501 First bridging connector; 502 Second bridging connector; 200 HVAC system; 201 Heat source module; 202 Water utilization unit; 203 Temperature control module. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0058] Please see Figure 1 The present application provides a heat storage device 100, which may include a shell 10, a heat exchange pipeline structure 30, a connecting pipeline structure 40 and a bridging structure 50.

[0059] Optionally, the shell 10 has a cubic structure, and an internal cavity is formed inside the shell 10. The cavity can be filled with a phase change material 20, which can store heat.

[0060] The heat exchange piping structure 30 can also be disposed inside the shell 10, and the heat exchange piping structure 30 is immersed in the phase change material 20. The heat exchange piping structure 30 can have multiple heat storage flow paths 301 and multiple heat release flow paths 302, and the multiple heat storage flow paths 301 and multiple heat release flow paths 302 can be alternately arranged along the first direction. Figure 1The X-axis direction is the first direction. It can also be described as follows: a heat release flow path 302 is provided between two adjacent heat storage flow paths 301, and a heat storage flow path 301 is provided between two adjacent heat release flow paths 302. All heat storage flow paths 301 and heat release flow paths 302 are immersed in the phase change material 20. The heat storage flow path 301 can transfer heat to the phase change material 20, which stores heat. The heat release flow path 302 can absorb the heat stored in the phase change material 20. When cold water flows into the heat release flow path 302, the cold water absorbs the heat from the phase change material 20, and the cold water is heated into hot water for users, thus providing hot water to users in real time.

[0061] Combination Figure 2 As shown, the connecting pipeline structure 40 can have a heat storage inlet 4011, a heat storage outlet 4012, a heat release inlet 4021, and a heat release outlet 4022. The heat storage inlet 4011, the heat storage outlet 4012, the heat release inlet 4021, and the heat release outlet 4022 are all located at the first end of the heat exchange pipeline structure 30. Alternatively, the heat storage inlet 4011, the heat storage outlet 4012, the heat release inlet 4021, and the heat release outlet 4022 are all located at the first end of the heat storage flow path 301 and the heat release flow path 302. The first end of each heat storage flow path 301 can be connected to one of the heat storage inlet 4011 and the heat storage outlet 4012, and the first end of each heat release flow path 302 can be connected to one of the heat release inlet 4021 and the heat release outlet 4022.

[0062] The bridging structure 50 can be located at the second end of the heat exchanger pipe structure 30. It should be noted that the first and second ends of the heat exchanger pipe structure 30 are opposite ends. If the first end of the heat exchanger pipe structure 30 is the top end of the heat exchanger pipe structure 30, then the second end of the heat exchanger pipe structure 30 is the bottom end of the heat exchanger pipe structure 30. Figure 2 As shown, the positive direction of the Z-axis points to the first end of the heat exchange pipe structure 30, and the negative direction of the Z-axis points to the second end of the heat exchange pipe structure 30.

[0063] Combination Figure 2 and Figure 3 As shown, the bridging structure 50 may include a first bridging pipe 501 and a second bridging pipe 502. The second ends of two adjacent heat storage flow paths 301 are connected through the first bridging pipe 501, and the first ends of the two adjacent heat storage flow paths 301 are respectively connected to the heat storage inlet 4011 and the heat storage outlet 4012. The second ends of two adjacent heat release flow paths 302 may be connected through the second bridging pipe 502, and the first ends of the two adjacent heat release flow paths 302 are respectively connected to the heat release inlet 4021 and the heat release outlet 4022.

[0064] Combination Figure 1As shown, when hot fluid flows into the first end of a heat storage flow path 301 from the heat storage inlet 4011, the hot fluid can flow to the second end of the heat storage flow path 301, and through the first bridge pipe 501, flow from the second end of one heat storage flow path 301 to the second end of another heat storage flow path 301, then flow to the first end of another heat storage flow path 301, and then flow out from the heat storage outlet 4012, forming a heat storage loop; and when cold fluid flows into the first end of a heat release flow path 302 from the heat release inlet 4021, the cold fluid can flow to the second end of one heat release flow path 302, and through the second bridge pipe 502, flow from the second end of one heat release flow path 302 to the second end of another heat release flow path 302, then flow to the first end of another heat release flow path 302, and then flow out from the heat release outlet 4022, forming a heat release loop.

[0065] Therefore, this application connects the second ends of the two heat storage flow paths 301 through the first bridge connector 501, so that the hot fluid can flow in from the first end of one heat storage flow path 301 and flow from the second end of one heat storage flow path 301 to the second end of another heat storage flow path 301 through the first bridge connector 501, and finally flow out from the first end of the other heat storage flow path 301. The second ends of the two heat release flow paths 302 are connected through the second bridge connector 502. The flow path of the cold fluid in the heat release flow path 302 is similar to that of the hot fluid in the heat storage flow path 301, and will not be described in detail here. Therefore, there is no need to set a connecting pipe extending from the first end to the second end of the self-heat exchange pipeline structure 30, which can reduce the length of the connecting pipe, save material costs, and also reduce the risk of deformation of the pipeline during installation.

[0066] Please see Figures 2 to 4 In some embodiments, the heat exchange pipeline structure 30 may include heat exchange tubes 303, a plurality of heat exchange tubes 303 may be arranged along a first direction, and one of two adjacent heat exchange tubes 303 may define a heat storage flow path 301, and the other of two adjacent heat exchange tubes 303 may define a heat release flow path 302.

[0067] Optionally, among the multiple heat exchange tubes 303 arranged along the first direction, some heat exchange tubes 303 define a heat storage flow path 301, and others define a heat release flow path 302. A heat release flow path 302 is provided between two adjacent heat storage flow paths 301, and a heat storage flow path 301 is provided between two adjacent heat release flow paths 302. This alternating arrangement helps reduce direct heat loss. The heat in the heat storage flow path 301 can be effectively stored and released through the heat release flow path 302 when needed. Simultaneously, since the heat release flow path 302 is located between the heat storage flow paths 301, it can absorb and release heat more effectively, thereby improving the overall thermal efficiency of the system.

[0068] Optionally, each heat exchange tube 303 can extend meanderingly along the second direction to form multiple bends, and the multiple bends can be repeatedly bent along the third direction, wherein the first direction, the second direction, and the third direction are arranged perpendicular to each other.

[0069] Combination Figure 1 As shown, the direction of the X-axis is the first direction, the direction of the Z-axis is the second direction, and the direction of the Y-axis is the third direction.

[0070] The following explanation uses the example where both the first and third directions are horizontal, and the first and third directions are perpendicular to each other. The second direction is vertical and perpendicular to the horizontal plane containing the first and third directions.

[0071] Specifically, each heat exchange tube 303 can include multiple straight tubes and multiple U-shaped tubes. The straight tubes extend along a third direction, and the multiple straight tubes are arranged in parallel and spaced apart along a second direction. The ends of two adjacent straight tubes on the same side can be connected through a U-shaped tube, so that two adjacent straight tubes and a U-shaped tube can form a curved loop tube after being connected. Multiple curved loop tubes can be connected sequentially through multiple U-shaped tubes, thereby forming a flow path that bends repeatedly along a third direction. The heat exchange through the heat storage flow path 301 and the heat release flow path 302 defined by the heat exchange tube 303 not only improves the efficiency of heat exchange, but also optimizes the space utilization.

[0072] Optionally, the heat exchange tube 303 is a finned tube with multiple fins on its outer wall. These fins are arranged sequentially and at intervals along the extension direction of the heat exchange tube 303, allowing the flow path defined by the heat exchange tube 303 to pass through the fins. This also makes the originally smooth outer wall of the heat exchange tube 303 more uneven, significantly increasing the surface area in contact with the phase change material 20. Due to the increased heat exchange area, the phase change material 20 can more fully exchange heat with the heat exchange tube 303 through the fins. Both heat storage and heat release processes are more efficient, reducing heat loss and waste.

[0073] In some embodiments, the heat exchange tube 303 defining the heat storage flow path 301 is made of aluminum. Aluminum is an excellent thermal conductor with a higher thermal conductivity than many other metals. Therefore, as the heat exchange tube 303 of the heat storage flow path 301, the aluminum tube can quickly transfer heat from the hot fluid to the tube wall and effectively transfer heat to the phase change material 20. This efficient heat conduction capability is crucial for the heat storage process, ensuring that heat is transferred to the phase change material 20 quickly and uniformly. The heat exchange tube 303 defining the heat release flow path 302 is made of stainless steel. The heat release flow path 302 is connected to municipal water, which generally contains aluminum ions. Aluminum ions can corrode metals. Due to its special alloy composition and the formation of a passivation film on its surface, the stainless steel tube can effectively resist the erosion of these corrosive factors, thereby ensuring the long-term stable operation of the heat exchange tube 303.

[0074] Please see Figure 3 and Figure 4 In some embodiments, the plurality of heat exchange tubes 303 may include a first heat exchange tube 3031, a second heat exchange tube 3032, a third heat exchange tube 3033, and a fourth heat exchange tube 3034 arranged sequentially along a first direction. The first heat exchange tube 3031 and the second heat exchange tube 3032 may be connected through a first bridge tube 501, and the second heat exchange tube 3032 and the fourth heat exchange tube 3034 may be connected through a second bridge tube 502.

[0075] Optionally, the first heat exchange tube 3031 and the third heat exchange tube 3033 can define a heat storage flow path 301, and the second heat exchange tube 3032 and the fourth heat exchange tube 3034 can define a heat release flow path 302, so that two adjacent heat storage flow paths 301 can be connected through the first bridge tube 501, and two adjacent heat release flow paths 302 can be connected through the second bridge tube 502. This allows the first bridge tube 501 to connect the two heat storage flow paths 301 along the shortest path, and also allows the second bridge tube 502 to connect the two heat release flow paths 302 along the shortest path. The above connection method can reduce the length of the first bridge tube 501 and the second bridge tube 502.

[0076] Please see Figure 2 and Figure 5 In some embodiments, the connecting pipe structure 40 may include a heat storage manifold 401 and a heat release manifold 402.

[0077] Optionally, two heat storage manifolds 401 are disposed at the first end of the heat exchange pipeline structure 30. One heat storage manifold 401 has a heat storage inlet 4011 for the inflow of hot fluid, while the other heat storage manifold 401 has a heat storage outlet 4012 for the outflow of hot fluid. Furthermore, the heat storage manifold 401 with heat storage inlet 4011 can be connected to the first end of a portion of the heat storage flow path 301, and the heat storage manifold 401 with heat storage outlet 4012 can be connected to the first end of another portion of the heat storage flow path 301, so that after the hot fluid flows into the heat storage manifold 401 from the heat storage inlet 4011, it can be divided into multiple heat storage loops, and each heat storage loop flows from the first end of one heat storage flow path 301 to the second end of another heat storage flow path 301, then flows into the second end of another heat storage flow path 301 through the first bridge pipe 501, and finally converges from the first end of another heat storage flow path 301 to the manifold with heat storage outlet 4012.

[0078] Similarly, two heat-dissipating manifolds 402 are disposed at the first end of the heat exchange pipeline structure 30. One heat-dissipating manifold 402 has a heat-dissipating inlet 4021, and the other heat-dissipating manifold 402 has a heat-dissipating outlet 4022. The heat-dissipating manifold 402 with the heat-dissipating inlet 4021 can be connected to the first end of a portion of the multiple heat-dissipating flow paths 302, and the heat-dissipating manifold 402 with the heat-dissipating outlet 4022 can be connected to the first end of the multiple heat-dissipating flow paths 302. The first end of another heat-exhausting flow path 302 is connected, so that after the cold fluid flows into the heat-exhausting manifold 402 from the heat-exhausting inlet 4021, it can be divided into multiple heat-exhausting loops. Each heat-exhausting loop flows from the first end of one heat-exhausting flow path 302 to the second end of another heat-exhausting flow path 302, then flows into the second end of another heat-exhausting flow path 302 through the second bridge pipe 502, and finally converges from the first end of another heat-exhausting flow path 302 to the manifold with the heat-exhausting outlet 4022.

[0079] Therefore, by setting up the heat storage manifold 401 and the heat release manifold 402, multiple heat storage loops and multiple heat release loops can be formed, thereby improving the efficiency of heat exchange.

[0080] Please see Figures 5 to 7 In some embodiments, the connecting pipeline structure 40 may further include a first connecting branch pipe 403, one end of which may be connected to the heat storage manifold 401 or the heat release manifold 402, and the other end of which may be connected to the first end of the heat exchange pipeline structure 30.

[0081] Optionally, the connecting pipe structure 40 may include a plurality of first connecting branch pipes 403, wherein a portion of the first connecting branch pipes 403 is used to connect the heat storage manifold 401 and the heat storage flow path 301, and another portion of the first connecting branch pipes 403 is used to connect the heat release manifold 402 and the heat release flow path 302.

[0082] Specifically, when one end of the first connecting branch pipe 403 is connected to the heat storage manifold 401, the other end of the first connecting branch pipe 403 is connected to the heat storage flow path 301; and when one end of the first connecting branch pipe 403 is connected to the heat release manifold 402, the other end of the first connecting branch pipe 403 is connected to the heat release flow path 302. Therefore, by setting the first connecting branch pipe 403, the heat storage manifold 401 and the heat storage flow path 301 can be connected, as well as the heat release manifold 402 and the heat release flow path 302 can be connected.

[0083] Please see Figure 7 and Figure 8 In some embodiments, the connecting pipe structure 40 may also include a pipe support plate 404 and a pipe limiting plate 405.

[0084] Optionally, the pipe support plate 404 can be fixed to the first end of the heat exchange pipe structure 30, and a plurality of first connecting branch pipes 403 can be disposed on the pipe support plate 404, which can support the first connecting branch pipes 403.

[0085] Multiple pipe limiting plates 405 can be installed on the pipe support plate 404, and the multiple pipe limiting plates 405 are arranged along the first direction. The pipe limiting plates 405 and the pipe support plate 404 can clamp the first connecting branch pipe 403, thereby limiting the first connecting branch pipe 403 and preventing the first connecting branch pipe 403 from shaking, so that the pipe connection of the heat storage device 100 is more secure.

[0086] The pipeline limiting plate 405 may include multiple limiting parts 4051, which may be arranged along a first direction, and each limiting part 4051 may clamp a first connecting branch pipe 403 between itself and the pipeline support plate 404, so that the first connecting branch pipe 403 is firmly fixed between the limiting part 4051 and the pipeline support plate 404.

[0087] Please see Figure 9 and Figure 10In some embodiments, the heat storage flow path 301 may include a first heat storage branch path 3011 and a second heat storage branch path 3012, and the first heat storage branch path 3011 and the second heat storage branch path 3012 are arranged along a second direction. Alternatively, the first heat storage branch path 3011 may be located on the side of the second heat storage branch path 3012 facing the heat storage manifold 401. Multiple first heat storage branch paths 3011 may be arranged at intervals along a first direction, and multiple second heat storage branch paths 3012 may also be arranged at intervals along a first direction.

[0088] Combination Figures 11 to 13 As shown, optionally, the first ends of two adjacent first heat storage branch paths 3011 can be connected to the heat storage inlet 4011 and the heat storage outlet 4012 respectively, and the second ends of the two adjacent first heat storage branch paths 3011 are connected through the first bridge pipe 501, so that the heat storage inlet 4011, one first heat storage branch path 3011, one first bridge pipe 501, another first heat storage branch path 3011, and the heat storage outlet 4012 can be sequentially connected to form a first heat storage branch loop. Similarly, the first ends of two adjacent second heat storage branch paths 3012 can be connected to the heat storage inlet 4011 and the heat storage outlet 4012 respectively, and the second ends of the two adjacent second heat storage branch paths 3012 can be connected through the first bridge pipe 501, so that the heat storage inlet 4011, one second heat storage branch path 3012, one first bridge pipe 501, another second heat storage branch path 3012, and the heat storage outlet 4012 can be sequentially connected to form a second heat storage branch loop.

[0089] Thus, the heat storage device 100 can form multiple first heat storage branch circuits and multiple second heat storage branch circuits inside, which can further improve the heat storage efficiency during the heat storage process. Also, the first heat storage branch circuit does not need to be equipped with a connecting pipe extending from the first end of the first heat storage branch circuit 3011 to the second end, which can reduce the length of the connecting pipe and save material costs. The second heat storage branch circuit only needs to be equipped with a connecting pipe extending from the first end of the first heat storage branch circuit 3011 to the first end of the second heat storage branch circuit 3012. Compared with the connecting pipe extending from the first end of the first heat storage branch circuit 3011 to the second end of the second heat storage branch circuit 3012, half of the pipe length can be saved.

[0090] Optionally, the heat release path 302 may include a first heat release branch path 3021 and a second heat release branch path 3022, and the first heat release branch path 3021 and the second heat release branch path 3022 are also arranged along the second direction. Alternatively, the first heat release branch path 3021 is located on the side of the second heat release branch path 3022 facing the heat release manifold 402. Multiple first heat release branch paths 3021 and multiple first heat storage branch paths 3011 are arranged alternately along the first direction, and multiple second heat release branch paths 3022 and multiple second heat storage branch paths 3012 are also arranged alternately along the first direction.

[0091] Similarly, the first ends of two adjacent first heat-exothermic branch paths 3021 can be connected to the heat-exothermic inlet 4021 and the heat-exothermic outlet 4022 respectively, and the second ends of the two adjacent first heat-exothermic branch paths 3021 are connected through the second bridge connector 502, so that the heat-exothermic inlet 4021, one first heat-exothermic branch path 3021, one second bridge connector 502, another first heat-exothermic branch path 3021, and the heat-exothermic outlet 4022 can be sequentially connected to form a first heat-exothermic branch loop. Likewise, the first ends of two adjacent second heat-exothermic branch paths 3022 can be connected to the heat-exothermic inlet 4021 and the heat-exothermic outlet 4022 respectively, and the second ends of the two adjacent second heat-exothermic branch paths 3022 can be connected through the second bridge connector 502, so that the heat-exothermic inlet 4021, one second heat-exothermic branch path 3022, one second bridge connector 502, another second heat-exothermic branch path 3022, and the heat-exothermic outlet 4022 can be sequentially connected to form a second heat-exothermic branch loop.

[0092] Thus, the heat storage device 100 can form multiple first heat release branch circuits and multiple second heat release branch circuits inside, which can further improve the heat absorption efficiency in the heat release process, provide hot water to users more efficiently, and the first and second heat release branch circuits can also reduce the length of the connecting pipes, saving material costs. The principle is the same as that of the first and second heat storage branch circuits, so it will not be described again here.

[0093] Please see Figures 14 to 16 In some embodiments, the connecting pipe structure 40 may also include a plurality of tee pipes 406, a plurality of second connecting branch pipes 407 and a plurality of third connecting branch pipes 408.

[0094] Optionally, the tee pipe 406 has a first interface, a second interface, and a third interface. The first interface of the tee pipe 406 can be connected to the heat storage manifold 401 or the heat release manifold 402 through the first connecting branch pipe 403, while the second interface of the tee pipe 406 can be connected to the heat exchange pipe 303 through the second connecting branch pipe 407, and the third interface of the tee pipe 406 can be connected to the heat exchange pipe 303 through the third connecting branch pipe 408.

[0095] Specifically, when the first port of the tee connector 406 is connected to the heat storage manifold 401, the second port of the tee connector 406 can be connected to the first end of the first heat storage branch 3011 through the second connecting branch 407, and the third port of the tee connector 406 can be connected to the first end of the second heat storage branch 3012 through the third connecting branch 408; when the first port of the tee connector 406 is connected to the heat release manifold 402, the second port of the tee connector 406 can be connected to the first end of the first heat release branch 3021 through the second connecting branch 407, and the third port of the tee connector 406 can be connected to the first end of the second heat release branch 3022 through the third connecting branch 408.

[0096] Thus, the heat storage manifold 401 can be connected to the first heat storage branch 3011 and the second heat storage branch 3012 respectively through the tee connector 406, the second connecting branch 407, and the third connecting branch 408, which reduces the length of the pipes connected to the heat storage manifold 401. Similarly, the tee connector 406, the second connecting branch 407, and the third connecting branch 408 can connect the heat release manifold 402 to the first heat release branch 3021 and the second heat release branch 3022 respectively, which also reduces the length of the pipes connected to the heat release manifold 402.

[0097] In some embodiments, the flow path lengths of the first heat storage branch 3011 and the first heat release branch 3021 are equal, both being 'a'; the flow path lengths of the second heat storage branch 3012 and the second heat release branch 3022 are also equal, both being 'b'; the pipe length of the second connecting branch 407 is L1; and the pipe length of the third connecting branch 408 is L2. a, b, L1, and L2 satisfy the following condition: a + L1 = b + L2.

[0098] Optionally, when a, b, L1, and L2 satisfy: a + L1 = b + L2, the flow path length of the first heat storage branch loop is approximately equal to that of the second heat storage branch loop. This allows the heat fluid to be evenly distributed in the heat storage manifold 401 to the first heat storage branch loop 3011 and the second heat storage branch loop 3012, preventing uneven distribution of the heat fluid in the heat exchange pipeline structure 30. This results in a more uniform temperature distribution in the heat exchange pipeline structure 30 and improves the heat exchange efficiency.

[0099] Similarly, when a, b, L1 and L2 satisfy: a+L1=b+L2, the flow path length of the first heat-releasing branch loop is approximately equal to that of the second heat-releasing branch loop, so that the cold fluid can be evenly distributed in the heat-releasing manifold 402 to the first heat-releasing branch loop 3021 and the second heat-releasing branch loop 3022, thus preventing the problem of uneven distribution of cold fluid in the heat exchange pipeline structure 30.

[0100] In some embodiments, the housing 10 may include an outer shell and an inner shell disposed inside the outer shell. The inner shell may have a receiving cavity, and the heat exchange pipeline structure 30 may be disposed in the receiving cavity. The receiving cavity may be provided with a phase change material 20.

[0101] Optionally, the inner shell can be a stainless steel liner, so that the inner shell can form a receiving cavity for accommodating the phase change material 20, and can prevent the phase change material 20 from leaking.

[0102] In some embodiments, the housing 10 may further include a heat insulation layer, which may be disposed between the inner housing and the outer housing. The heat insulation layer can play a role in heat preservation, reduce the transfer of heat from the inside of the inner housing to the outside, and thus prevent the heat stored in the phase change material 20 from being lost, thereby further improving the heat exchange efficiency between the heat exchange tube 303 structure and the phase change material 20.

[0103] Optionally, the insulation layer can cover the outer wall of the inner shell, and the insulation layer can cover the top, bottom and perimeter of the inner shell. In other words, the insulation layer wraps the inner shell and plays a role in overall insulation.

[0104] Please see Figure 17 In some embodiments, a heating, ventilation and air conditioning (HVAC) system 200 provided in this application is provided. The HVAC system 200 can provide hot water to users in real time. The HVAC system 200 includes a heat source module 201, a water utilization unit 202, and a heat storage device 100.

[0105] Specifically, the heat source module 201 can be connected to the heat storage flow path 301, and the hot fluid in the heat source module 201 can flow into the heat storage flow path 301. The heat storage flow path 301 can transfer heat to the phase change material 20. The water utilization unit 202 can be connected to the heat release flow path 302. After the cold water flows into the heat release flow path 302, it can absorb the heat of the phase change material 20. After the cold water is heated into hot water, it can be used by users, thus providing users with clean hot water in real time without the need to set up a water tank to store hot water.

[0106] Optionally, the heat source module 201 may include a main heat source unit and an auxiliary heat source unit. Both the main heat source unit and the auxiliary heat source unit can be connected to the heat storage flow path 301, and both can transfer heat to the phase change material 20 through the heat storage flow path 301.

[0107] The main heat source unit can include one of a solar thermal collector module, a water source heat exchange module, and an air source heat exchange module. When conditions permit, more environmentally friendly natural energy sources such as solar thermal collector modules, water source heat exchange modules, and air source heat exchange modules are preferred to exchange heat with the phase change material 20, thereby saving energy.

[0108] The auxiliary heat source unit includes an electric heating module. When the main heat source unit is insufficient, the auxiliary heat source unit can provide energy to ensure the stability and continuity of heat supply.

[0109] Please see Figure 17 In some embodiments, the HVAC system 200 may also include a temperature control module 203, which may be connected in parallel with the heat storage device 100 and share the heat source module 201. The HVAC system 200 may also have a first working mode and then a second working mode.

[0110] When the HVAC system 200 is in the first working mode, the heat source module 201 can provide heat to the phase change material 20, so that the water utilization unit 202 can absorb the heat stored in the phase change material 20 to heat the cold water, thereby providing hot water to the user; when the HVAC system 200 is in the second working mode, the heat source module 201 can provide heat to the temperature control module 203, so that the temperature control module 203 can be used to regulate the indoor temperature.

[0111] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0112] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat storage device, characterized by comprising: The application relates to a heat storage device. The heat storage device comprises a shell, a phase change material arranged in the shell, a heat exchange pipeline structure arranged in the shell, a plurality of heat storage flow paths and a plurality of heat release flow paths, the plurality of heat storage flow paths and the plurality of heat release flow paths are arranged in the phase change material in a first direction, the heat storage flow paths are used for storing heat in the phase change material, and the heat release flow paths are used for absorbing the heat stored in the phase change material. The heat storage device further comprises a connecting pipeline structure, a heat storage inlet and a heat storage outlet of the connecting pipeline structure are in communication with the heat storage flow paths, a heat release inlet and a heat release outlet of the connecting pipeline structure are in communication with the heat release flow paths, and the heat storage inlet, the heat storage outlet, the heat release inlet and the heat release outlet are arranged at a first end of the heat exchange pipeline structure. The heat storage device further comprises a bridging structure arranged at a second end of the heat exchange pipeline structure, the bridging structure comprises a first bridging pipe and a second bridging pipe, two adjacent heat storage flow paths are in communication through the first bridging pipe and are in communication with the heat storage inlet and the heat storage outlet respectively, and two adjacent heat release flow paths are in communication through the second bridging pipe and are in communication with the heat release inlet and the heat release outlet respectively. The heat exchange pipeline structure comprises a plurality of heat exchange pipes arranged in the first direction, one of the two adjacent heat exchange pipes defines the heat storage flow path, and the other of the two adjacent heat exchange pipes defines the heat release flow path.

2. The heat storage device according to claim 1, characterized by The heat exchange pipe is a finned pipeline, and a plurality of pipe fins are arranged on the heat exchange pipe in an extending mode of the heat exchange pipe. The heat exchange pipe defining the heat storage flow path is an aluminum pipe, and the heat exchange pipe defining the heat release flow path is a stainless steel pipe.

3. The thermal storage device of claim 2, wherein, The heat storage device further comprises a plurality of heat exchange pipes arranged in the first direction in sequence, the plurality of heat exchange pipes comprise a first heat exchange pipe, a second heat exchange pipe, a third heat exchange pipe and a fourth heat exchange pipe, the first heat exchange pipe and the third heat exchange pipe are in communication through the first bridging pipe, and the second heat exchange pipe and the fourth heat exchange pipe are in communication through the second bridging pipe.

4. The thermal storage device of claim 2, wherein The connecting pipeline structure comprises a heat storage manifold, two heat storage manifolds are arranged at the first end of the heat exchange pipeline structure, one of the heat storage manifolds has the heat storage inlet and is in communication with a part of the heat storage flow paths, and the other of the heat storage manifolds has the heat storage outlet and is in communication with another part of the heat storage flow paths. The connecting pipeline structure further comprises a heat release manifold, two heat release manifolds are arranged at the first end of the heat exchange pipeline structure, one of the heat release manifolds has the heat release inlet and is in communication with a part of the heat release flow paths, and the other of the heat release manifolds has the heat release outlet and is in communication with another part of the heat release flow paths. The connecting pipeline structure further comprises a first connecting branch pipe, one end of the first connecting branch pipe is in communication with the heat storage manifold or the heat release manifold, and the other end of the first connecting branch pipe is in communication with the first end of the heat exchange pipeline structure.

6. The thermal storage device of claim 1, wherein ​ ​ ​ 7. The thermal storage device of claim 6, wherein, ​ One end of the first connecting branch pipe is in communication with the heat storage header pipe, and the other end of the first connecting branch pipe is in communication with the heat storage flow path. One end of the first connecting branch pipe is in communication with the heat storage header pipe, and the other end of the first connecting branch pipe is in communication with the heat storage flow path.

8. The thermal storage device of claim 7, wherein, The connecting pipeline structure further comprises: A pipeline support plate is arranged at the first end of the heat exchange pipeline structure. A plurality of pipeline limiting plates are arranged along the first direction on the pipeline support plate, and the pipeline limiting plate comprises a plurality of limiting portions arranged along the first direction, and the limiting portion is used for limiting the first connecting branch pipe.

9. The heat storage device according to claim 1, wherein: The heat storage flow path comprises first heat storage branch flow paths and second heat storage branch flow paths arranged along a second direction, the second direction intersects the first direction, the second ends of adjacent two first heat storage branch flow paths are in communication through the first bridge pipe, the first ends of the adjacent two first heat storage branch flow paths are in communication with the heat storage inlet and the heat storage outlet respectively, the second ends of adjacent two second heat storage branch flow paths are in communication through the first bridge pipe, and the first ends of the adjacent two second heat storage branch flow paths are in communication with the heat storage inlet and the heat storage outlet respectively. The heat release flow path comprises first heat release branch flow paths and second heat release branch flow paths arranged along the second direction, the second ends of adjacent two first heat release branch flow paths are in communication through the second bridge pipe, the first ends of the adjacent two first heat release branch flow paths are in communication with the heat release inlet and the heat release outlet respectively, the second ends of adjacent two second heat release branch flow paths are in communication through the second bridge pipe, and the first ends of the adjacent two second heat release branch flow paths are in communication with the heat release inlet and the heat release outlet respectively.

10. The thermal storage device of claim 9, wherein, The connecting pipeline structure further comprises a plurality of three-way connectors, a plurality of second connecting branch pipes and a plurality of third connecting branch pipes. The first interface of the three-way connector is in communication with the heat storage inlet or the heat storage outlet, the second interface of the three-way connector is in communication with the first heat storage branch flow path through the second connecting branch pipe, and the third interface of the three-way connector is in communication with the second heat storage branch flow path through the third connecting branch pipe. Alternatively, the first interface of the three-way connector is in communication with the heat release inlet or the heat release outlet, the second interface of the three-way connector is in communication with the first heat release branch flow path through the second connecting branch pipe, and the third interface of the three-way connector is in communication with the second heat release branch flow path through the third connecting branch pipe.

11. The thermal storage device of claim 10, wherein, The flow path lengths of the first heat storage branch flow path and the first heat release branch flow path are a, the flow path lengths of the second heat storage branch flow path and the second heat release branch flow path are b, the pipeline length of the second connecting branch pipe is L1, and the pipeline length of the third connecting branch pipe is L2, a, b, L1 and L2 satisfy: a+L1=b+L2.

12. The thermal storage device of claim 1, wherein, The shell comprises an outer shell and an inner shell arranged inside the outer shell, the inner shell has a containing cavity, the heat exchange pipeline structure is arranged in the containing cavity, and the containing cavity is provided with the phase change material.

13. The thermal storage device of claim 12, wherein, The shell further comprises a heat preservation layer arranged between the inner shell and the outer shell.

14. A heating and ventilation system, characterized in that The heating system comprises a heat source module, a water utilization unit and the heat storage device as claimed in any one of claims 1-13, the heat source module is in communication with the heat storage flow path to transfer heat to the phase change material through the heat storage flow path, and the water utilization unit is in communication with the heat release flow path to transfer heat to the water utilization unit through the heat release flow path.

15. The heating system of claim 14, wherein, The heat source module comprises a main heat source unit and an auxiliary heat source unit, the main heat source unit and the auxiliary heat source unit are both in communication with the heat storage flow path, the main heat source unit comprises one of a solar heat collection module, a water source heat exchange module and an air source heat exchange module, and the auxiliary heat source unit comprises an electric heating module.

16. The heating system of claim 14, wherein, The heating system further comprises a temperature regulating module, the temperature regulating module is arranged in parallel with the heat storage device and shares the heat source module, and the temperature regulating module is used to control indoor temperature.

17. The heating system of claim 16, wherein, The heating system has: a first working mode, when the heating system is in the first working mode, the heat source module provides heat for the water utilization unit; and a second working mode, when the heating system is in the second working mode, the heat source module provides heat for the temperature regulating module.

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