Integrated heat and cold storage plate

Abstract

The utility model discloses an integrated heat and cold storage plate which comprises a plate body, the plate body is provided with long-strip-shaped phase change heat storage material containing cavities and phase change cold storage material containing cavities which are distributed at intervals, the phase change heat storage material containing cavities are filled with phase change heat storage materials, and the phase change cold storage material containing cavities are filled with phase change cold storage materials. The two ends of the phase change heat storage material containing cavity and the two ends of the phase change cold storage material containing cavity are sealed through plugs in a hot melting welding or ultrasonic welding mode. The plug is composed of an inner plug piece, an outer plug piece and a connecting portion, the inner plug piece and the outer plug piece are parallel to each other, the connecting portion connects the inner plug piece and the outer plug piece, a sealing material filling cavity is formed among the outer plug piece, the inner plug piece and the inner wall of the phase-change material containing cavity, and a plurality of sealing material filling holes are formed in the outer plug piece. The energy storage plate can be suitable for environments with different temperatures, when the environment temperature changes, the plate body does not need to be disassembled to replace the energy storage material, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of phase change energy storage, in particular to an integrated heat storage and cold storage plate. Background Art

[0002] Strengthening the effective recycling and utilization of waste heat resources, improving energy utilization efficiency, and developing various new technologies for renewable energy are effective ways to solve the energy crisis. However, there is a common problem in the utilization of renewable energy and waste heat resources. On the energy consumption side, the demand for cold, hot, and electric loads of living and production end users such as schools, hospitals, shopping malls, and factories will also fluctuate greatly over time. The above objective problems make energy supply and demand mismatched in time and space, resulting in insufficient energy utilization and serious waste of waste heat resources.

[0003] Energy storage technology is a technology that uses energy storage materials with a certain specific volume to store temporarily different energies and use them when needed. This technology can effectively solve the problem of energy supply and demand mismatch in time and quantity, thereby improving energy efficiency. In recent years, with the in-depth research and continuous exploration of energy storage technology by scholars, energy storage technology has played an increasingly important role in the development of new energy, improving energy utilization, and coordinating the mismatch between energy supply and demand in quantity and time. Therefore, it has broad application prospects in the fields of electricity "peak shifting and valley filling", recycling of industrial waste heat, utilization of solar energy, energy saving of heat pump systems, and civil building energy.

[0004] Existing energy storage plates using phase change materials usually only store phase change materials with one phase change temperature and can only be used in one season. When the season changes, as the ambient temperature changes, the phase change material in the plate needs to be replaced, which is relatively cumbersome. For example, as shown in patent reference 1:

[0005] Reference 1: Chinese patent document with patent publication number CN107121003A.

[0006] Reference 1 discloses a replaceable rapid heat exchange phase change heat storage and cold storage plate, which is composed of a shell, heat transfer fins and heat storage or cold storage material. Heat transfer fins for transferring heat are installed on the shell, and heat storage or cold storage material is installed between the shell and the heat transfer fins, leaving a certain gap as expansion space. The entire shell seals the heat storage or cold storage material to prevent leakage.

[0007] Although the energy storage board in reference 1 can be applied to different temperature environments, when the ambient temperature changes, the energy storage material inside the board needs to be replaced, which is not convenient to use. Utility Model Content

[0008] The utility model aims to solve the problem that the energy storage plate in the prior art cannot be conveniently adapted to different temperature environments, and provides an integrated heat storage and cold storage plate.

[0009] The technical solution of the utility model is: an integrated heat storage and cold storage plate, comprising a plate body, wherein the plate body has a phase change heat storage material cavity and a phase change cold storage material cavity that are distributed at intervals, the phase change heat storage material cavity is filled with a phase change heat storage material, and both ends of the phase change heat storage material cavity and the phase change cold storage material cavity are closed by plugging, hot melt welding or ultrasonic welding.

[0010] As a further optimization of the integrated heat storage and cold storage plate of the utility model: the plug includes an inner plugging piece and an outer plugging piece which are parallel to each other and a connecting part connecting the inner plugging piece and the outer plugging piece, the cross-section of the inner plugging piece is suitable for the cross-section of the phase change heat storage material cavity and the phase change cold storage material cavity, the cross-section of the outer plugging piece is larger than the cross-section of the phase change heat storage material cavity and the phase change cold storage material cavity, a sealing material infusion cavity is formed between the outer plugging piece, the inner plugging piece and the phase change heat storage material cavity and the inner wall of the phase change cold storage material cavity, and a plurality of sealing material infusion holes are provided on the outer plugging piece.

[0011] As a further optimization of the integrated heat storage and cold storage plate of the utility model: the material of the plate body is PP, PE or PPS.

[0012] As a further optimization of the integrated heat storage and cold storage plate of the utility model: the phase change heat storage material is an inorganic salt phase change heat storage material.

[0013] As a further optimization of the integrated heat storage and cold storage plate of the utility model: the phase change cold storage material is an organic compound, a hydrated salt or an aqueous solution of a salt.

[0014] As a further optimization of the integrated heat storage and cold storage plate of the utility model: the cross-sections of the phase change heat storage material cavity and the phase change cold storage material cavity are both rectangular or circular.

[0015] The utility model has the following beneficial effects: the integrated heat storage and cold storage plate has long strip phase change heat storage material cavities and phase change cold storage material cavities which are distributed at intervals, the phase change heat storage material cavities and the phase change cold storage material cavities are filled with phase change heat storage material and phase change cold storage material respectively, the integrated heat storage and cold storage plate can be applied to different temperature environments, when the ambient temperature changes, there is no need to disassemble the plate body to replace the energy storage material, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the positional relationship between the phase change heat storage material cavity and the phase change cold storage material cavity of the heat storage and cold storage plate of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the heat storage and cold storage plate of the utility model;

[0018] Figure 3 for Figure 2 A local enlarged schematic diagram of the middle A;

[0019] Figure 4 This is a schematic diagram of the structure of the plug in the heat storage and cold storage plate of the utility model;

[0020] Figure 5 It is a schematic diagram of the top view of the structure of the plug in the heat storage and cold storage plate of the utility model;

[0021] Markings in the figure:

[0022] 1. Phase change cold storage material cavity;

[0023] 2. Phase change thermal storage material cavity;

[0024] 3. Plug;

[0025] 3-1, internal plugging piece;

[0026] 3-2, external plugging piece;

[0027] 3-3, connecting part;

[0028] 3-4. Sealing material pouring hole. DETAILED DESCRIPTION

[0029] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with embodiments, but the content of the present invention is not limited to the following embodiments.

[0030] like Figure 1-3 As shown: an integrated heat storage and cold storage plate includes a plate body, wherein the plate body has a long phase change heat storage material cavity 2 and a phase change cold storage material cavity 1 that are distributed at intervals, the phase change heat storage material cavity 2 is filled with a phase change heat storage material, the phase change cold storage material cavity 1 is filled with a phase change cold storage material, and both ends of the phase change heat storage material cavity and the phase change cold storage material cavity are closed by plugging, hot melt welding or ultrasonic welding.

[0031] Overall, the heat exchange energy storage plate has only one layer, in which the phase change heat storage material cavity 2 and the phase change cold storage material cavity 1 are alternately distributed, and the cross-sections of the phase change heat storage material cavity 2 and the phase change cold storage material cavity 1 are both rectangular or circular. The material of the plate body is PP, PE or PPS.

[0032] Common phase change thermal storage materials include organic and inorganic types. Among organic phase change thermal storage materials, commonly used ones are straight-chain alkanes, fatty acids, fatty alcohols, polyols and polymer phase change materials. These materials can absorb and release a large amount of thermal energy during solid-solid phase change or solid-liquid phase change. Among them, solid-solid phase change organic thermal storage materials include layered perovskites, polymers and polyols. Inorganic phase change thermal storage materials include crystalline hydrated salts, molten salts, metals and alloys. This type of material usually has a large phase change latent heat and a wide melting point range, so it is widely used in energy storage and release in high temperature fields. Among them, common inorganic phase change materials include calcium chloride hexahydrate, sodium acetate trihydrate, organic alcohols, etc.

[0033] Common phase change cold storage materials mainly include ice, eutectic salt, organic matter and refrigerant gas hydrate. These materials can absorb and release a large amount of heat by using their phase change characteristics, and are used to store and release cold energy. Eutectic salt uses its solid-liquid phase change characteristics to store cold, also known as eutectic salt. It is a phase change material formed by mixing two or more substances to form a eutectic composition. Eutectic salt has a lower phase change temperature and a higher phase change latent heat, so it is suitable for use in cold storage systems in the medium and low temperature range. Organic phase change cold storage materials mainly include fatty acids, polyols, etc., which do not produce large temperature changes during phase change and have good thermal stability and chemical stability. In addition, some polymers can also be used as phase change cold storage materials.

[0034] like Figure 4 and 5 As shown, the plug 3 includes an inner plugging piece 3-1 and an outer plugging piece 3-2 which are parallel to each other and a connecting portion 3-3 connecting the inner plugging piece 3-1 and the outer plugging piece 3-2. The cross section of the outer plugging piece 3-2 is larger than the cross section of the phase change heat storage material cavity 2 and the phase change cold storage material cavity 2. A sealing material injection cavity is formed between the outer plugging piece 3-2, the inner plugging piece and the inner wall of the phase change material cavity (i.e., the phase change heat storage material cavity and the phase change cold storage material cavity), and a plurality of sealing material injection holes 3-4 are provided on the outer plugging piece 3-2.

[0035] The sealing material adopts hot melt sealant. This sealant melts at high temperature to form a sealing layer, which has good chemical resistance, heat resistance and cold resistance.

[0036] The integrated heat storage and cold storage plate is obtained by the following processes:

[0037] A plate body having a phase-change heat storage material cavity 2 and a phase-change cold storage material cavity 1 is obtained by injection molding;

[0038] Place the inner plugging piece of the plug 3 in the phase change energy storage material channel, and place the outer plugging piece 3-2 at the port of the phase change material cavity. Fill the sealing material into the sealing material filling cavity between the outer plugging piece 3-2, the inner plugging piece and the inner wall of the phase change material cavity through the filling hole on the outer plugging piece 3-2 to complete the closure of one end of the phase change material cavity. Then, fill the phase change energy storage material into the phase change material cavity, and complete the closure of the other end of the phase change material cavity according to the above operation.

[0039] It should be noted that the selection of the above process steps is not the only option and can be adjusted according to actual conditions, especially according to the phase change material pouring method. If the phase change heat storage material and the phase change cold storage material are poured at the same time, all the plugs on the same side can be made into an integrated type. If the phase change heat storage material and the phase change cold storage material are poured separately, the plugs can only be made into a single type. After the phase change heat storage material / phase change cold storage material is poured, it is sealed with a plug, and then the phase change cold storage material / phase change heat storage material is poured.

[0040] It should be noted that the phase change heat storage material cavity 2 and the phase change cold storage material cavity 1 can also be sealed by other methods, such as sealing both ends of the plate by hot melt sealing or ultrasonic welding, or by hemming.

[0041] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. An integrated heat storage and cold storage plate, comprising a plate body, characterized in that: The plate body has long phase change heat storage material cavities and phase change cold storage material cavities distributed at intervals. The phase change heat storage material cavities are filled with phase change heat storage materials, and the phase change cold storage material cavities are filled with phase change cold storage materials. Both ends of the phase change heat storage material cavities and the phase change cold storage material cavities are closed respectively.

2. The integrated heat storage and cold storage plate according to claim 1, characterized in that: Both ends of the phase-change heat storage material cavity and the phase-change cold storage material cavity are closed by plugs respectively.

3. The integrated heat storage and cold storage plate according to claim 2, characterized in that: The plug includes an inner plugging piece and an outer plugging piece which are parallel to each other and a connecting portion connecting the inner plugging piece and the outer plugging piece. The cross section of the inner plugging piece is suitable for the cross section of the phase change heat storage material cavity and the phase change cold storage material cavity. The cross section of the outer plugging piece is larger than the cross section of the phase change heat storage material cavity and the phase change cold storage material cavity. A sealing material injection cavity is formed between the outer plugging piece, the inner plugging piece, the phase change heat storage material cavity and the inner wall of the phase change cold storage material cavity. A plurality of sealing material injection holes are provided on the outer plugging piece.

4. The integrated heat storage and cold storage plate according to claim 1, characterized in that: Both ends of the phase-change heat storage material cavity and the phase-change cold storage material cavity are sealed by hot-melt welding or ultrasonic welding.

5. The integrated heat storage and cold storage plate according to claim 1, characterized in that: The material of the plate is PP, PE or PPS.

6. The integrated heat storage and cold storage plate according to claim 1, characterized in that: The phase change heat storage material is an inorganic salt phase change heat storage material.

7. The integrated heat storage and cold storage plate according to claim 1, characterized in that: The phase-change cold storage material is an organic compound, a hydrated salt or a salt aqueous solution.

8. The integrated heat storage and cold storage plate according to claim 1, characterized in that: The cross sections of the phase-change heat storage material cavity and the phase-change cold storage material cavity are both rectangular.

9. The integrated heat storage and cold storage plate according to claim 1, characterized in that: The cross sections of the phase-change heat storage material cavity and the phase-change cold storage material cavity are both circular.

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