A phase change cold storage device applied to a cold storage

Abstract

The utility model discloses a phase change cold storage device for cold storage, including the cold storage plate body, the inside filling of cold storage plate body has phase change material, and the middle of cold storage plate body is provided with at least one transverse pressing bead, and the transverse pressing bead is recessed to the inside of cold storage plate body, to divide the inside cavity of cold storage plate body into a plurality of phase change material containing cavities, and a plurality of vertical grooves are arranged on the front and rear two large area surfaces of cold storage plate body, and the vertical grooves are through from front to back, and the top of the side of cold storage plate body is provided with liquid inlet bottle mouth. The utility model overcomes the insufficient of prior art, and the internal space is divided into a plurality of independent chambers through the transverse pressing bead, effectively prevents phase change material deposition and phase separation, ensures long -term crystallization stability, and through vertical groove, the heat exchange area is increased significantly and the airflow is guided, and the heat exchange efficiency is strengthened, and the cold charging and releasing time are shortened.

Description

Technical Field

[0001] This utility model relates to the field of cold storage technology, specifically to a phase change cold storage device applied to cold storage. Background Technology

[0002] Variable energy storage technology utilizes the principle that phase change materials (PCMs) absorb or release a large amount of latent heat when undergoing a physical state change (such as liquid-to-solid) to store and release cold energy. This technology is widely used in cold chain logistics, cold storage warehouses, cold chain transport containers, and other fields to achieve peak shaving and valley filling of electricity, stabilize storage temperature, and save energy and reduce consumption.

[0003] Currently, most mainstream phase change energy storage plates on the market are rectangular or plate-shaped structures with flat surfaces. This simple internal cavity structure, during long-term cyclic use, is prone to component precipitation or phase separation due to gravity caused by the phase change materials (especially some composite or water-based phase change materials). For example, key functional components such as nucleating agents and thickeners in the solution gradually settle to the bottom of the energy storage plate, causing the upper material to lose or weaken its crystallization ability. Over time, the overall crystallization rate of the energy storage plate decreases significantly, the energy storage capacity decreases drastically, and ultimately it becomes essentially unusable, seriously affecting the stability and economy of cold storage operation. Furthermore, because the outer surface of most existing energy storage plates is a smooth planar structure, they mainly rely on natural convection or forced airflow for heat exchange in cold storage. This structure limits the contact area between the energy storage plate and the air, resulting in low heat exchange efficiency. The entire phase change process requires a relatively long time to complete during the cooling (freezing) and cooling (thawing) processes. This not only affects the response speed of the cold storage / cooling, but also limits its application effectiveness in severe working conditions with large temperature fluctuations or requiring rapid cooling. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a phase change cold storage device for cold storage, which overcomes the deficiencies of existing technologies, has a reasonable design, can effectively prevent the precipitation and phase separation of phase change materials, and ensure long-term crystallization stability; it also significantly increases the heat exchange area and guides airflow, enhances heat exchange efficiency, and shortens the charging and releasing time.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A phase change cold storage device for cold storage includes a cold storage plate body, the interior of which is filled with a phase change material. At least one transverse rib is provided in the middle of the cold storage plate body, and the transverse rib is recessed into the interior of the cold storage plate body to divide the internal cavity of the cold storage plate body into multiple phase change material receiving cavities. Multiple vertical grooves are provided on the front and rear large surface areas of the cold storage plate body, and the vertical grooves are connected front and rear. A liquid inlet is provided on the upper side of the cold storage plate body.

[0007] Preferably, there are multiple transverse ribs, which are located on the same horizontal line and are evenly distributed along the length of the cold storage plate body.

[0008] Preferably, the cross-sectional shape of the transverse reinforcing rib is arc-shaped, V-shaped, or U-shaped.

[0009] Preferably, the cold storage plate body, the horizontal ribs, the vertical grooves, and the liquid inlet are integrally blow-molded or injection-molded.

[0010] Preferably, the inlet of the liquid bottle is sealed by ultrasonic sealing, capping, or by a threaded sealing cap.

[0011] This invention provides a phase change cold storage device for cold storage, which has the following advantages: The large internal space of the cold storage plate is divided into multiple chambers by horizontal ribs, localizing the material precipitation problem. The nucleating agent is confined to the bottom of each chamber, continuing to catalyze its area and preventing overall failure. Multiple vertical grooves increase the contact area between the cold storage plate surface and the air, and these grooves also act as airflow guides, effectively organizing and guiding airflow, disrupting the static air boundary layer on the plate surface, enhancing turbulence, and strengthening convective heat transfer. This allows for more efficient utilization of the heat exchange driving force. The top liquid inlet design ensures that the injection port is always above the highest liquid level of the phase change material, physically eliminating the possibility of liquid leakage from the inlet. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of this utility model or the prior art will be briefly introduced below.

[0013] Figure 1 A schematic diagram of the structure of this utility model;

[0014] Figure 2 A schematic diagram of the planar structure of this utility model;

[0015] Explanation of the labels in the diagram:

[0016] 1. Cold storage plate body; 2. Horizontal pressure ribs; 3. Vertical grooves; 4. Liquid inlet bottle mouth. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] Example 1, as Figure 1-2 As shown, a phase change cold storage device for cold storage includes a cold storage plate body 1, the interior of which is filled with phase change material. At least one transverse rib 2 is provided in the middle of the cold storage plate body 1, and the transverse rib 2 is recessed into the interior of the cold storage plate body 1 to divide the inner cavity of the cold storage plate body 1 into multiple phase change material receiving cavities. Multiple vertical grooves 3 are provided on the front and rear large surface areas of the cold storage plate body 1, and the vertical grooves 3 are connected front and rear. A liquid inlet 4 is provided on the upper side of the cold storage plate body 1.

[0019] Working principle:

[0020] By indenting the transverse ribs 2 into the interior of the cold storage plate body 1, the originally continuous large internal space is physically divided into multiple parallel, smaller chamber regions. During long-term use, when the internal phase change material of the cold storage plate body 1 tends to precipitate due to gravity, the internal partitions formed by the transverse ribs 2 effectively block and limit the large-scale, uncontrolled migration of solid particles or high-density components within the entire plate. The precipitates are confined to the bottom region of their respective chambers, rather than accumulating entirely at the bottom of the entire cold storage plate. This ensures that even if local precipitation occurs, the precipitates at the bottom of each chamber can still act as a local nucleation catalyst for the phase change material in its area. During crystallization (cooling), these local nucleation points can effectively initiate the crystallization of the phase change material within that chamber, allowing multiple regions of the entire cold storage plate body 1 to initiate and complete the crystallization process almost synchronously from top to bottom. This contrasts sharply with existing technologies where all precipitates concentrate at the bottom, preventing effective crystallization in the upper and middle sections, significantly improving the overall crystallization ratio and the long-term stability of the cold storage capacity.

[0021] Furthermore, by setting multiple vertical grooves 3 on the front and rear surfaces of the cold storage plate body 1, the effective contact surface area between the cold storage plate body 1 and the surrounding air is directly increased. Thus, in environments with forced ventilation or natural convection in cold storage, the vertical grooves 3 can effectively capture and guide airflow, causing it to flow along the depth of the vertical grooves 3, increasing the residence time of the airflow on the surface of the cold storage plate body 1 and reducing dead zones. Simultaneously, the structure of the vertical grooves 3 creates a disturbance effect on the flowing air, disrupting the static boundary layer formed on the surface of the cold storage plate body 1 due to temperature differences, thereby enhancing convective heat transfer. Consequently, during cooling, heat can be removed from the plate more quickly, and during cooling release, the cold energy can be released to the environment more efficiently, significantly shortening the complete phase change cycle time.

[0022] By positioning the inlet 4 above the side of the cold storage plate body 1, and ensuring that its opening is always above the highest liquid level of the phase change material in its liquid state, there is no continuous liquid pressure between the phase change material and the inlet seal, thus eliminating the driving force for leakage. The sealing structure of the inlet 4 only needs to cope with the extremely low vapor pressure that may occur, rather than the hydrostatic pressure of the liquid, thereby greatly improving the sealing reliability and the absolute safety of the cold storage plate during use and handling, fundamentally eliminating the risk of contaminating the cold storage environment due to leakage.

[0023] In Example 2, as a further preferred embodiment of Example 1, there are multiple transverse ribs 2, located on the same horizontal line and evenly distributed along the length of the cold storage plate body 1. These multiple evenly distributed transverse ribs 2 divide the interior of the cold storage plate body 1 into several uniformly distributed independent chambers, thereby dispersing and confining the risk of phase change material precipitation and phase separation within each independent micro-chamber. This prevents large-scale, irreversible overall material failure occurring within a single large cavity, transforming a global problem into a controllable local problem, thus significantly improving the overall performance consistency and long-term stability of the cold storage plate throughout its lifespan. Furthermore, the multiple transverse ribs 2 enhance the structural strength of the cold storage plate body 1, effectively resisting the internal stress caused by material volume changes during phase change, and avoiding fatigue deformation or weld cracking due to repeated expansion and contraction.

[0024] In Example 3, as a further preferred embodiment of Example 1, the cross-sectional shape of the transverse rib 2 is arc-shaped, V-shaped, or U-shaped. By designing the cross-sectional shape of the transverse rib 2 as a smooth transition geometry of arc, V-shape, or U-shape, when the internal volume of the phase change material changes or when it is impacted externally, these shapes can effectively disperse the stress generated along the smooth curved surface or inclined wall, avoiding stress concentration at sharp corners. This significantly reduces the risk of cracking or leakage of the cold storage plate at the rib, ensuring the durability of the product. Furthermore, the streamlined inner wall also facilitates the flow of liquid phase change material during filling and between chambers, reducing flow resistance and making the material filling more uniform.

[0025] In Example 4, as a further preferred embodiment of Example 1, the cold storage plate body 1, the transverse ribs 2, the vertical grooves 3, and the liquid inlet 4 are integrally blow-molded or injection-molded. By employing an integral molding process, the structural integrity and sealing reliability are ensured, avoiding defects such as thermal stress deformation, micro-cracks, and poor sealing that may result from traditional welding or splicing processes. This significantly improves the manufacturing precision and long-term reliability of the cold storage plate. The integral molding process ensures seamless connection between structural components, completely encapsulating the phase change material within a seamless barrier. Its leak-proof reliability depends solely on the density of the raw materials and the sealing quality of the bottle opening, thus minimizing the risk of leakage and greatly enhancing absolute safety in the complex environment of cold storage.

[0026] Example 5, as a further preferred embodiment of Example 1, involves sealing the inlet bottle 4 using ultrasonic sealing, capping, or a threaded connection. Ultrasonic sealing achieves a high-strength seal on the inlet bottle 4, fusing the plastic bottle opening and the sealing diaphragm at the molecular level to form a seamless, gapless sealing interface. This sealing method offers excellent airtightness and durability, effectively preventing the phase change material from evaporating or leaking during long-term thermal cycling. Capping typically involves a metal or plastic cap with an embedded sealing ring, using mechanical force to press its rolled edge against a pre-set flange on the bottle opening, thus tightly pressing the sealing ring against the bottle opening end face. This sealing method creates a one-time press-fit seal, offering advantages such as reliable sealing, low cost, and high production efficiency. It provides a highly practical solution for cost-sensitive mass-produced products while maintaining superior leak-proof safety compared to traditional side-threaded caps. The threaded sealing cap, on the other hand, uses precisely designed threads to tighten onto the bottle neck, and with the help of a flexible sealing gasket, achieves a removable and reliable seal, suitable for applications requiring subsequent maintenance or phase change material replacement. Three sealing methods can be flexibly selected according to actual usage needs.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A phase change cold storage device for cold storage, comprising a cold storage plate body (1), wherein the cold storage plate body (1) is filled with a phase change material, characterized in that: The cold storage plate body (1) has at least one transverse pressure rib (2) in the middle. The transverse pressure rib (2) is recessed into the interior of the cold storage plate body (1) to divide the inner cavity of the cold storage plate body (1) into multiple phase change material receiving cavities. Multiple vertical grooves (3) are provided on the front and rear large surface areas of the cold storage plate body (1). The vertical grooves (3) are connected front and back. An inlet bottle (4) is provided on the upper side of the cold storage plate body (1).

2. The phase change cold storage device for cold storage according to claim 1, characterized in that: The transverse ribs (2) are multiple, and the multiple transverse ribs (2) are located on the same horizontal line and are evenly distributed along the length direction of the cold storage plate body (1).

3. The phase change cold storage device for cold storage according to claim 1, characterized in that: The cross-sectional shape of the transverse reinforcing bar (2) is arc-shaped, V-shaped, or U-shaped.

4. A phase change cold storage device for cold storage according to claim 1, characterized in that: The cold storage plate body (1), the horizontal pressure rib (2), the vertical groove (3) and the liquid inlet (4) are integrally blow-molded or injection-molded.

5. A phase change cold storage device for cold storage according to claim 1, characterized in that: The inlet of the liquid bottle (4) is sealed by ultrasonic sealing, capping, or by threaded connection of the sealing cap.

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