Heat storage device

Abstract

The utility model belongs to the technical field of heating, and particularly discloses a heat storage device which comprises a box body and a box cover, a sealing strip is arranged at the bottom of the box cover along the peripheral side, a first converging device is arranged on one side of the top of the box body, and a second converging device is arranged on the other side of the top of the box body. The middle part of the first converging device extends outwards to form a water outlet pipe, and the middle part of the second converging device extends outwards to form a water inlet pipe; a plurality of heat storage assemblies are arranged in the box body side by side in the longitudinal direction, the water inlet end of each heat storage assembly communicates with the second flow collecting device, and the water outlet end of each heat storage assembly communicates with the first flow collecting device. A plurality of heat storage assemblies are arranged in the box body side by side in the longitudinal direction, water or other working media flow through the heat storage assemblies to complete heat exchange, in the process, due to the fact that each heat storage assembly works independently, when one heat storage assembly is damaged, only the damaged heat storage assembly needs to be replaced, and the use cost in the later period is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating, and particularly relates to a heat storage device. Background Art

[0002] At present, most countries in the world are facing the problem of contradiction between power supply and economic development needs. The peak and valley loads of power grids vary greatly, and the utilization rate of valley electricity is not high. Compared with conventional energy, solar energy is a huge energy treasure house, which is clean, pollution-free and easy to use. Especially in some mountainous areas, such as Gansu, Qinghai, Tibet and other places in my country, the solar radiation intensity is high, while other energy sources are in short supply, so the use of solar energy is more common. However, the energy density of solar radiation reaching the earth's surface is very low, and it is affected by regular changes in geography, day and night, and seasons, as well as random factors such as sunny and rainy days. Its radiation intensity is constantly changing, with significant rarefaction, intermittence and instability. In order to keep the heating or power supply device running stably and uninterruptedly, a heat storage device is needed to store solar energy and valley electricity, and release it when solar energy is insufficient, so as to meet the needs of continuous and stable supply of production and living energy.

[0003] The Chinese patent with publication number CN215217302U discloses an anti-corrosion phase change heat storage device, in which a heat exchange coil is welded between the bottom ends of the medium inlet pipe and the medium outlet pipe, and the heat medium flows through the heat exchange coil to heat the box-type transformer material, thereby playing a role in heat storage. However, in this scheme, the heat exchange tube with a disc-shaped structure has a small contact area with the phase change material and a low heat exchange efficiency. More importantly, the heat exchange tube is an integral structure. When a certain section is damaged, the entire heat exchange coil needs to be replaced, which increases the cost of use. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects in the prior art and provide a heat storage device.

[0005] The utility model provides a heat storage device, comprising a box body and a box cover, wherein a sealing strip is arranged along the circumference of the bottom of the box cover, a first confluence device is arranged on one side of the top of the box body, and a second confluence device is arranged on the other side of the top of the box body, a water outlet pipe is extended outwardly from the middle of the first confluence device, and a water inlet pipe is extended outwardly from the middle of the second confluence device;

[0006] A plurality of heat storage components are arranged side by side in the longitudinal direction inside the box body, the water inlet end of each heat storage component is connected to the second flow confluence device, and the water outlet end of each heat storage component is connected to the first flow confluence device.

[0007] A further solution is that the heat storage component includes a working fluid conduit, and heat storage fins are arranged on the outside of the working fluid conduit;

[0008] An outlet elbow is provided at the end of the working fluid conduit. The outlet elbow is a Z-shaped structure. The bottom of the outlet elbow is connected to the working fluid conduit, and the top of the outlet elbow is connected to the first confluence device; the starting end of the working fluid conduit is connected to the second confluence device.

[0009] A further solution is that the working fluid conduit is a serpentine structure, and the heat storage fins are pleated spiral fins.

[0010] A further solution is that the first confluence device and the second confluence device have the same structure, and the first confluence device and the second confluence device are both provided with a plurality of through holes at the bottom, and the number and position of the through holes are adapted to the thermal storage assembly;

[0011] A joint is provided at the through hole, and the starting end of the working medium conduit is connected to the joint through an inlet elbow; and the top of the outlet elbow is connected to the joint.

[0012] A further solution is that the interior of the box is filled with a phase change material, and the filling height of the phase change material is flush with the starting end of the working fluid conduit.

[0013] A further solution is that the side wall of the box body is a hollow structure, and a heat-insulating material is arranged inside the hollow structure to form a heat-insulating layer.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The utility model arranges a plurality of heat storage components in parallel along the longitudinal direction inside the box body, and each heat storage component is respectively connected to the first confluence device and the second confluence device. Heat exchange is completed by flowing water or other working fluids through the heat storage component. In this process, since each heat storage component works independently, when one of the heat storage components is damaged, only the damaged one needs to be replaced, thereby reducing the later use cost.

[0016] (2) The working fluid conduit of the utility model adopts a plurality of serpentine working fluid conduit structures, and corrugated spiral fins are fixed on the outer wall of the working fluid conduit, thereby increasing the heat exchange area between the fluid working fluid and the phase change material and improving the heat exchange efficiency. It can collect low-cost, non-continuous energy such as valley electricity and solar energy, and store the generated heat in the phase change material for all-day heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are only used to illustrate and explain the present invention, and are not intended to limit the scope of the present invention, wherein:

[0018] Figure 1 : Schematic diagram of the structure of the utility model;

[0019] Figure 2: Schematic diagram of the top view of the internal structure of the box;

[0020] Figure 3 : Schematic diagram of the heat storage component structure;

[0021] Figure 4 : Schematic diagram of the internal structure of the box;

[0022] In the figure: 1. box body; 2. box cover; 3. water outlet pipe; 4. first confluence device; 5. water inlet pipe; 6. second confluence device; 7. heat storage component; 8. working fluid conduit; 9. heat storage fins; 10. water outlet elbow; 11. joint; 12. water inlet elbow; 13. insulation layer. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution, design method and advantages of the utility model clearer, the utility model is further described in detail through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] like Figure 1 and Figure 2 As shown, the utility model provides a heat storage device, including a box body 1 and a box cover 2, a sealing strip is arranged along the circumferential side of the bottom of the box cover 2, and the sealing is ensured when the box cover 2 and the box body are buckled, a first confluence device 4 is arranged on the left side of the top of the box body 1, a second confluence device 6 is arranged on the right side of the top of the box body 1, an outlet pipe 3 is extended outward from the middle of the first confluence device 4, and a water inlet pipe 5 is extended outward from the middle of the second confluence device 6; a plurality of heat storage components 7 are arranged side by side in the longitudinal direction inside the box body 1, and in the present embodiment, 15 groups of heat storage components 7 are arranged side by side, the water inlet end of each of the heat storage components 7 is connected to the second confluence device 6, and the water outlet end of each of the heat storage components 7 is connected to the first confluence device 4.

[0025] like Figure 3 As shown, in the above, the heat storage component 7 includes a working fluid conduit 8, and a heat storage fin 9 is arranged on the outside of the working fluid conduit 8; a water outlet elbow 10 is arranged at the end of the working fluid conduit 8, and the water outlet elbow 10 is a Z-shaped structure, the bottom of the water outlet elbow 10 is connected to the working fluid conduit 8, and the top of the water outlet elbow 10 is connected to the first confluence device 4; the starting end of the working fluid conduit 8 is connected to the second confluence device 6, and the inside of the box 1 is filled with a phase change material, and the filling height of the phase change material is flush with the starting end of the working fluid conduit 8. In this embodiment, the phase change material is a high thermal conductivity filler to enhance the heat transfer performance of the phase change material. Among them, the working fluid conduit 8 is a serpentine structure, and the heat storage fin 9 is a pleated spiral fin, which increases the heat exchange area between the fluid working fluid and the phase change material and improves the heat exchange efficiency.

[0026] like Figure 4 As shown, the first confluence device 4 and the second confluence device 6 have the same structure, and a plurality of through holes are provided at the bottom of the first confluence device 4 and the second confluence device 6, the number and position of the through holes are adapted to the heat storage assembly 7; a joint 11 is provided at the through hole, and the starting end of the working fluid conduit 8 is connected to the joint 11 through an inlet elbow 12; and the top of the outlet elbow 10 is connected to the joint 11.

[0027] In order to further improve the heat storage efficiency, in the present embodiment, the side wall of the box body 1 is a hollow structure, and a heat-insulating material is arranged inside the hollow structure to form a heat-insulating layer 13 .

[0028] In this embodiment, the starting ends of the multiple serpentine working fluid conduits 8 are fixed to the water inlet elbow 12 by welding to enhance the structural stability. The multiple serpentine working fluid conduits are exactly the same to ensure that the fluid flows evenly from the water inlet pipe 5 and the second confluence device 6 to the working fluid conduit 8. The gaps between the pleated spiral fins are filled with phase change materials for heat storage, which increases the heat exchange area. When the hot working fluid flows into the heat storage component from the water inlet 5 of the box 1 and flows out of the heat storage component from the water outlet pipe 3 of the box 1, when it flows through multiple serpentine conduits arranged side by side, the heat energy it carries is transferred to the phase change material. The phase change material absorbs the heat of the hot working fluid and undergoes a phase change to complete the storage of heat energy. When heating is needed, the cold working fluid flows through the serpentine conduit, the heat storage material solidifies, releases heat, completes the heat release process, and achieves the purpose of heating on the user side.

[0029] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A heat storage device, comprising a box body (1) and a box cover (2), wherein a sealing strip is arranged along the circumference of the bottom of the box cover (2), characterized in that: A first flow converging device (4) is provided on one side of the top of the box body (1), and a second flow converging device (6) is provided on the other side of the top of the box body (1); a water outlet pipe (3) is provided at the middle of the first flow converging device (4) extending outwards, and a water inlet pipe (5) is provided at the middle of the second flow converging device (6) extending outwards; A plurality of heat storage components (7) are arranged side by side in the longitudinal direction inside the box body (1); the water inlet end of each heat storage component (7) is connected to the second flow confluence device (6), and the water outlet end of each heat storage component (7) is connected to the first flow confluence device (4).

2. A heat storage device according to claim 1, characterized in that: The heat storage component (7) comprises a working fluid conduit (8), and heat storage fins (9) are arranged on the outside of the working fluid conduit (8); A water outlet elbow (10) is provided at the end of the working fluid conduit (8); the water outlet elbow (10) is a Z-shaped structure; the bottom of the water outlet elbow (10) is connected to the working fluid conduit (8), and the top of the water outlet elbow (10) is connected to the first flow confluence device (4); and the starting end of the working fluid conduit (8) is connected to the second flow confluence device (6).

3. A heat storage device according to claim 2, characterized in that: The working fluid conduit (8) is a serpentine structure, and the heat storage fins (9) are pleated spiral fins.

4. A heat storage device according to claim 2, characterized in that: The first confluence device (4) and the second confluence device (6) have the same structure, and a plurality of through holes are provided at the bottom of the first confluence device (4) and the second confluence device (6), and the number and position of the through holes are adapted to the heat storage assembly (7); A joint (11) is provided at the through hole, and the starting end of the working medium conduit (8) is connected to the joint (11) via a water inlet elbow (12); and the top of the water outlet elbow (10) is connected to the joint (11).

5. A heat storage device according to claim 2, characterized in that: The box (1) is filled with a phase change material, and the filling height of the phase change material is flush with the starting end of the working fluid conduit (8).

6. A heat storage device according to claim 1, characterized in that: The side wall of the box body (1) is a hollow structure, and a heat-insulating material is arranged inside the hollow structure to form a heat-insulating layer (13).

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