Cold storage plate and refrigeration device

Abstract

The invention relates to a cold storage plate and a refrigeration device, the cold storage plate comprises a shell, the shell comprises a containing cavity, the shell comprises a first side wall and a second side wall which are oppositely arranged in a first direction, and a third side wall and a fourth side wall which are oppositely arranged in a second direction, and the first direction is perpendicular to the second direction; the at least two first baffles are arranged in parallel in the first direction and arranged between the third side wall and the fourth side wall at intervals, the two ends of each first baffle make contact with the third side wall and the fourth side wall respectively, and each first baffle is provided with a plurality of first open holes; the at least two second baffles are arranged in parallel in the second direction and arranged between the first side wall and the second side wall at intervals, and a plurality of second open holes are formed in the second baffles. The cold charging speed can be increased, and the cold discharging speed can be slowed down.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a cold storage plate and a refrigeration device. Background Art

[0002] In all links of cold chain logistics, refrigerated trucks, as one of the most critical means of transportation, play an irreplaceable role. According to different cooling technologies, refrigerated trucks (refrigeration devices) can be roughly divided into mechanical, cold storage, LNG (liquefied natural gas) and liquid nitrogen / dry ice types. The core component of cold storage refrigerated trucks is the cold storage plate, which absorbs or releases latent heat during the solid-liquid phase change process through the built-in phase change material (cold storage agent), effectively maintaining the stability of the temperature in the car, and ensuring that the goods are properly stored in a suitable temperature environment.

[0003] However, in the related art, the cold storage plate has the problem of slow cooling rate and fast cooling rate. Summary of the invention

[0004] Based on this, it is necessary to provide a cold storage plate and a refrigeration device to address the problems in the related art that the cold storage plate has a slow cold charging rate and a fast cold releasing rate.

[0005] In a first aspect, the present application provides a cold storage plate, comprising:

[0006] A shell, comprising a receiving cavity, the shell comprising a first side wall and a second side wall arranged opposite to each other in a first direction, and a third side wall and a fourth side wall arranged opposite to each other in a second direction, wherein the first direction is perpendicular to the second direction;

[0007] at least two first baffles, arranged in parallel along the first direction and spaced apart from each other between the third side wall and the fourth side wall, two ends of the first baffles being in contact with the third side wall and the fourth side wall respectively, and a plurality of first openings being provided on the first baffles;

[0008] At least two second baffles are arranged in parallel along the second direction and are disposed between the first side wall and the second side wall at intervals, and a plurality of second openings are disposed on the second baffles.

[0009] In some embodiments, the length of the housing in the first direction is greater than the length of the housing in the second direction;

[0010] The second baffle is spaced apart from both the first side wall and the second side wall.

[0011] In some embodiments, the first baffle and the housing are integrally formed.

[0012] In some embodiments, in the first direction, the second baffle includes a middle portion and a first end portion close to the housing, and a first transition portion between the middle portion and the first end portion;

[0013] The density of the second openings per unit area of ​​the middle portion is greater than the density of the second openings per unit area of ​​the first transition portion;

[0014] The density of the second openings per unit area of ​​the first end portion is greater than the density of the second openings per unit area of ​​the first transition portion.

[0015] In some embodiments, the size of the second opening in the middle portion is smaller than the size of the second opening in the first end portion;

[0016] The number of the second openings per unit area of ​​the middle portion is greater than the number of the second openings per unit area of ​​the first end portion.

[0017] In some embodiments, the outer surface of the first side wall is a windward surface, the second baffle includes a first portion close to the first side wall, and a second portion close to the second side wall, and the density of the second openings per unit area of ​​the first portion is greater than the density of the second openings per unit area of ​​the second portion.

[0018] In some embodiments, the outer surface of the first side wall is a windward surface, and the outer surface of the first side wall is arranged in an arc shape;

[0019] The cold storage plate further includes a filling nozzle, and the filling nozzle is arranged on the second side wall.

[0020] In some embodiments, it further comprises:

[0021] A plurality of fins are at least arranged on a surface of the third side wall away from the accommodating cavity, and the plurality of fins are arranged in a staggered manner.

[0022] In some embodiments, the fin has an elliptical shape when projected on the third sidewall, and the length direction of the ellipse is parallel to the first direction;

[0023] The fin is a hollow structure, and the fin and the shell are an integrally formed structure.

[0024] In a second aspect, the present application provides a refrigeration device, comprising any one of the above-described cold storage plates.

[0025] In the embodiment of the present application, the first baffle and the second baffle inside the cold storage plate cleverly divide the constrained melting area and the unconstrained melting area of ​​the phase change material. The unconstrained melting area has both heat conduction and natural convection, and the cooling speed is fast, which can control the cold storage plate / refrigeration device to reach the required temperature quickly. In the constrained melting area, due to the setting of the first baffle and the second baffle, the solid phase change material cannot settle and squeeze the liquid phase upward, so the liquid phase continues to accumulate on one side of the heat exchange surface. The heat needs to be transferred to the solid phase change material on the first baffle and the second baffle side through the accumulated liquid film. This area can be considered to have only heat conduction, and the heat transfer efficiency is low, forming a step-by-step cooling effect of the phase change material, which not only maintains the temperature stability in the cold storage plate / refrigeration device, but also extends the cycle of the cold storage plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the drawings required for use in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A three-dimensional schematic diagram of a cold storage plate provided in some embodiments of the present application.

[0028] Figure 2 This is a first schematic top view of a cold storage plate provided in some embodiments of the present application.

[0029] Figure 3 This is a second schematic top view of a cold storage plate provided in some embodiments of the present application.

[0030] Figure 4 A cross-sectional schematic diagram of a cold storage plate provided in some embodiments of the present application.

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of a first baffle and a second baffle of a cold storage plate provided in some embodiments of the present application.

[0032] Figure 6 This is a first top view schematic diagram of a second baffle of a cold storage plate provided in some embodiments of the present application.

[0033] Figure 7 This is a second top view schematic diagram of a second baffle of a cold storage plate provided in some embodiments of the present application.

[0034] Figure 8 This is a third schematic top view of a second baffle of a cold storage plate provided in some embodiments of the present application.

[0035] Reference numerals: cold storage plate 100; housing 100K; first baffle 201; second baffle 301; accommodating chamber 100q; first side wall 101; second side wall 102; third side wall 103; fourth side wall 104; second opening 301k; phase change material 901; filling nozzle 501; fin 401;

[0036] Middle portion 301z; first end portion 301a; first transition portion 301b; first portion 3011a; second portion 3011b; first direction X; second direction Y. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] See also Figures 1 to 8 , Figure 1 A three-dimensional schematic diagram of a cold storage plate provided in some embodiments of the present application. Figure 2 This is a first schematic top view of a cold storage plate provided in some embodiments of the present application. Figure 3 This is a second schematic top view of a cold storage plate provided in some embodiments of the present application. Figure 4 A cross-sectional schematic diagram of a cold storage plate provided in some embodiments of the present application. Figure 5 This is a schematic diagram of the three-dimensional structure of a first baffle and a second baffle of a cold storage plate provided in some embodiments of the present application. Figure 6 This is a first top view schematic diagram of a second baffle of a cold storage plate provided in some embodiments of the present application. Figure 7 This is a second top view schematic diagram of a second baffle of a cold storage plate provided in some embodiments of the present application. Figure 8This is a third schematic top view of a second baffle of a cold storage plate provided in some embodiments of the present application. Figure 4 for Figure 1 or Figure 2 Schematic diagram of the cross-sectional structure at the AA dotted line.

[0044] The present application provides a cold storage plate 100, which includes a shell 100K, at least two first baffles 201 and at least two second baffles 301. The shell 100K includes a receiving cavity 100q, and the shell 100K includes a first side wall 101 and a second side wall 102 arranged opposite to each other in a first direction X, and a third side wall 103 and a fourth side wall 104 arranged opposite to each other in a second direction Y, wherein the first direction X is perpendicular to the second direction Y; at least two first baffles 201 are arranged in parallel along the first direction X, and are arranged between the third side wall 103 and the fourth side wall 104 at intervals, and both ends of the first baffle 201 are respectively arranged in contact with the third side wall 103 and the fourth side wall 104, and a plurality of first openings are arranged on the first baffle 201; at least two second baffles 301 are arranged in parallel along the second direction Y, and are arranged between the first side wall 101 and the second side wall 102 at intervals, and a plurality of second openings 301k are arranged on the second baffle 301.

[0045] For example, Figure 4 The first direction X and the second direction Y are illustrated in the figure. The shell 100K may further include a fifth side wall and a sixth side wall arranged opposite to each other in the third direction. When the first direction X and the second direction Y are parallel to the paper surface or the desktop, the third direction may be a direction perpendicular to the paper surface or the desktop.

[0046] For example, the first side wall 101 , the second side wall 102 , the third side wall 103 , the fourth side wall 104 , the fifth side wall and the sixth side wall of the shell 100K are surrounded to form an accommodating cavity 100q and may be an integrally formed structure to improve the sealing performance of the cold storage plate 100 .

[0047] For example, the housing 100K is designed as a hollow structure with a certain thickness, and high-density polyethylene (HDPE) can be selected as the material, and its shape design can be rectangular, disc-shaped, etc. In order to optimize the thermal conductivity performance, the thickness of each side wall of the housing 100K should be moderate, and should not be too thick to avoid increasing the thermal resistance. The thickness of each side wall of the housing 100K is in the range of 1 to 2 mm to balance the structural strength and heat exchange efficiency.

[0048] For example, the accommodating cavity 100q may contain a phase change material 901, and the phase conversion process of the phase change material 901 is sensitive to the external temperature change, and this process is reversible, so that the cold storage plate can be recycled, greatly extending the service life.

[0049] For example, at least two first baffles 201 are arranged in parallel along the first direction X and are spaced apart from each other between the third side wall 103 and the fourth side wall 104, that is, the plane where the first baffles 201 are located extends along the second direction Y, the surface of the first baffle 201 faces the first direction X, and the surface of the first baffle 201 faces the first side wall 101 or the second side wall 102.

[0050] For example, both ends of the first baffle 201 are respectively arranged in contact with the third side wall 103 and the fourth side wall 104 , so that the first baffle 201 can support the third side wall 103 and the fourth side wall 104 and maintain the space of the accommodating cavity 100q.

[0051] For example, at least two second baffles 301 are arranged in parallel along the second direction Y and are spaced apart from each other between the first side wall 101 and the second side wall 102, that is, the plane where the second baffles 301 are located extends along the first direction X, the surface of the second baffle 301 faces the second direction Y, and the surface of the second baffle 301 faces the third side wall 103 or the fourth side wall 104.

[0052] For example, the first baffle 201 is provided with a plurality of first openings (not shown in the figure), and the second baffle 301 is provided with a plurality of second openings 301k. The first baffle 201 and the second baffle 301 inside the cold storage plate 100 cleverly divide the constrained melting area and the non-constrained melting area of ​​the phase change material. The heat transfer efficiency of the constrained melting area is low, forming a stepped cooling effect of the phase change material, which not only maintains the temperature stability in the car, but also extends the cycle of the cold storage plate. The first baffle 201 is connected to the third side wall 103 and the fourth side wall 104, which not only enhances the stability of the structure, but also plays a supporting role.

[0053] In the embodiment of the present application, at least two first baffles 201 are arranged in parallel along the first direction X and are arranged between the third side wall 103 and the fourth side wall 104 at intervals. The two ends of the first baffle 201 are respectively in contact with the third side wall 103 and the fourth side wall 104, and a plurality of first openings are arranged on the first baffle 201; at least two second baffles 301 are arranged in parallel along the second direction Y and are arranged between the first side wall 101 and the second side wall 102 at intervals. A plurality of second openings 301k are arranged on the second baffle 301. The first baffle 201 and the second baffle 301 inside the cold storage plate 100 cleverly divide the constrained melting area and the non-constrained melting area of ​​the phase change material. The heat transfer efficiency of the constrained melting area is low, forming a step cooling effect of the phase change material, which not only maintains the temperature stability in the box of the cold storage plate 100 / refrigeration device (such as the compartment of a refrigerated truck), but also prolongs the cycle of the cold storage plate 100.

[0054] In the embodiment of the present application, the first baffle 201 and the second baffle 301 inside the cold storage plate 100 cleverly divide the constrained melting area and the unconstrained melting area of ​​the phase change material. The unconstrained melting area has both heat conduction and natural convection, and the cooling speed is fast, which can control the cold storage plate 100 / the box of the refrigeration device (such as the compartment of the refrigerated truck) to reach the required temperature quickly. In the constrained melting area, due to the setting of the first baffle 201 and the second baffle 301, the solid phase change material cannot settle and squeeze the liquid phase upward, so the liquid phase continues to accumulate on one side of the heat exchange surface, and the heat needs to be transferred to the solid phase change material on the first baffle 201 and the second baffle 301 side through the accumulated liquid film. This area can be considered to have only heat conduction, and the heat transfer efficiency is low, forming a step-by-step cooling effect of the phase change material, which not only maintains the temperature stability in the box of the cold storage plate 100 / the refrigeration device (such as the compartment of the refrigerated truck), but also prolongs the cycle of the cold storage plate 100.

[0055] It should be noted that during the cooling process of the phase change material, its melting behavior can be divided into two modes: constrained melting and unconstrained melting. Constrained melting means that due to the limitations of the surfaces of components such as walls, fins, and baffles, the solid phase change material cannot move freely, resulting in the gradual accumulation of liquid film thickness above the heating surface, and the solid-liquid interface moves away from the heating surface. In contrast, in the unconstrained melting mode, the solid phase change material can move freely in the container. Usually, because the density of the solid phase is higher than that of the liquid phase, under the action of gravity, the unmelted solid part will squeeze the liquid phase downward, forming a local natural convection phenomenon. In this case, the thermal conductivity resistance of the liquid film in the constrained melting mode is relatively high, while the melting rate in the unconstrained melting mode is usually faster due to the presence of natural convection.

[0056] In some embodiments, the length of the shell 100K in the first direction X is greater than the length of the shell 100K in the second direction Y; the second baffle 301 is spaced apart from the first side wall 101 and the second side wall 102 .

[0057] For example, the length of the housing 100K in the first direction X is greater than the length of the housing 100K in the second direction Y, so that the outer shape of the cold storage plate 100 is plate-shaped.

[0058] For example, the thickness of the side wall of the housing 100K is in the range of 1 to 2 mm, for example, the thickness of the third side wall 103 is in the range of 1 to 2 mm.

[0059] For example, the second baffle 301 is spaced from the first side wall 101 and the second side wall 102, so that the area between the second baffle 301 and the first side wall 101 can accommodate more phase change material, and the area between the second baffle 301 and the second side wall 102 can accommodate more phase change material. The housing 100K is a hollow housing with a certain thickness, and its shape is convenient for processing and fixing.

[0060] In some embodiments, the first baffle 201 and the housing 100K are an integrally formed structure.

[0061] For example, the first baffle 201 and the housing 100K are formed in one piece to ensure that they are highly consistent, and the first baffle 201 also has a supporting function.

[0062] For example, further, the first baffle 201, the second baffle 301 and the housing 100K are an integrally formed structure.

[0063] In some embodiments, Figure 6 As shown, in the first direction X, the second baffle 301 includes a middle portion 301z and a first end portion 301a close to the shell 100K (close to the first side wall 101 and the second side wall 102), and a first transition portion 301b located between the middle portion 301z and the first end portion 301a; the density of the second openings 301k per unit area of ​​the middle portion 301z is greater than the density of the second openings 301k per unit area of ​​the first transition portion 301b; the density of the second openings 301k per unit area of ​​the first end portion 301a is greater than the density of the second openings 301k per unit area of ​​the first transition portion 301b.

[0064] For example, the second openings 301k on the second baffle plate 301 are arranged in parallel. On the one hand, this arrangement can avoid blockage during filling of the phase change material. On the other hand, the second openings 301k on the second baffle plate 301 provide a path for the liquid phase change material to flow to the solid phase change material on the other side of the second baffle plate 301.

[0065] For example, the second openings 301k (two first end portions 301a) at both ends of the second baffle plate 301 make it less likely for clogging to occur when filling the phase change material; during the cooling process of the cold storage plate 100 (melting of the phase change material), the solid phase change material in the unconstrained melting zone first melts into a liquid state, and then may wash the two ends of the solid phase change material on the second baffle plate 301, while the solid phase change material located at the center of the second baffle plate 301 (middle portion 301z) will not be washed; but when the volume of the liquid phase change material in the accommodating cavity 100q of the cold storage plate 100 is greater than the volume of the solid phase change material, the liquid phase change material located below the second baffle plate 301 will flow through the second opening 301k to the top of the baffle to impact the solid phase change material. Since the solid phase change material at the center of the second baffle 301 (the middle part 301z) melts slowly, if there are more second openings 301k here, the convection heat exchange at this place can be enhanced; the number of second openings 301k decreases from the center to both sides (the number on both sides should not be too small to avoid clogging when the phase change material is filled). Therefore, the second openings 301k on the second baffle 301 can be arranged as follows: the density of the second openings 301k per unit area of ​​the middle part 301z is greater than the density of the second openings 301k per unit area of ​​the first transition part 301b; the density of the second openings 301k per unit area of ​​the first end part 301a is greater than the density of the second openings 301k per unit area of ​​the first transition part 301b; thereby, the melting rate of the solid phase change material on the second baffle 301 can be uniform, and the overall temperature uniformity of the cold storage plate 100 is good.

[0066] In some embodiments, Figure 7 As shown, the size of the second opening 301k in the middle portion 301z is smaller than the size of the second opening 301k in the first end portion 301a; the number of second openings 301k per unit area in the middle portion 301z is greater than the number of second openings 301k per unit area in the first end portion 301a.

[0067] For example, in the second baffle 301, compared with the first end portion 301a, the middle portion 301z needs to provide a path for the phase change material to flow and provide strong mechanical strength, so the size or length of the second opening 301k in the middle portion 301z is smaller, and more second openings 301k are provided, so that the middle portion 301z provides more paths for the phase change material to flow and has strong mechanical strength. At the same time, Figure 7 The number of second openings 301 k per unit area of ​​the middle portion 301 z in the example is greater, which can better improve the temperature uniformity of the cold storage plate 100 .

[0068] In some embodiments, Figure 4 and Figure 8As shown, the outer surface of the first side wall 101 is the windward surface, and the second baffle 301 includes a first portion 3011a close to the first side wall 101, and a second portion 3011b close to the second side wall 102, and the density of the second openings 301k per unit area of ​​the first portion 3011a is greater than the density of the second openings 301k per unit area of ​​the second portion 3011b.

[0069] For example, in some embodiments, the outer surface of the first side wall 101 is the windward surface, and the air cooler blows air toward the first side wall 101. The wind force of the air cooler is strong, and a faster cooling rate is required. At this time, the density of the second openings 301k per unit area of ​​the first portion 3011a is set to be greater than the density of the second openings 301k per unit area of ​​the second portion 3011b, that is, the phase change material in the first portion 3011a undergoes a faster phase change, and the heat exchange or transfer occurs faster. Therefore, setting a larger density of second openings 301k per unit area in the first portion 3011a can provide more paths for the flow of the phase change material, thereby increasing the cooling rate in the first portion 3011a. At the same time, by setting a smaller density of second openings 301k per unit area in the second portion 3011b, it is possible to avoid too rapid phase change of the entire phase change material in the entire cold storage plate 100, thereby reducing the overall heat transfer efficiency of the cold storage plate 100 and improving the overall cooling effect and time of the cold storage plate 100, thereby maintaining the temperature stability in the cold storage plate 100 / refrigeration device and extending the cycle of the cold storage plate 100.

[0070] It should be noted that Figure 6 and Figure 7 The second baffle 301 of the example can be applied to the cold storage plate 100 and the refrigeration device with different requirements. For example, in one case, the overall temperature uniformity requirement of the cold storage plate 100 is relatively low, and the second baffle 301 can be used. Figure 6 For example, in one case, the overall temperature uniformity of the cold storage plate 100 is required to be higher, and the Figure 7 Example cold storage plate.

[0071] In some embodiments, Figure 1 and Figure 4 As shown, the outer surface of the first side wall 101 is the windward surface, and the outer surface of the first side wall 101 is arranged in an arc shape; the cold storage plate 100 also includes a filling nozzle 501, and the filling nozzle 501 is arranged on the second side wall 102.

[0072] For example, the windward surface of the cold storage plate 100 (the outer surface of the first side wall 101 ) is designed as an arc-shaped structure, which is conducive to the air flowing smoothly over the surface of the cold storage plate 100 , reducing the flow resistance and achieving sufficient heat exchange.

[0073] For example, the filling nozzle 501 is designed to be embedded and located on the side opposite to the arc-shaped windward surface. Its specifications correspond to the size of the matching sealing cover, ensuring the sealing of the cold storage plate 100 after filling the phase change material.

[0074] For example, the first side wall 101 with an arc-shaped surface is formed in the integral molding process of the housing 100k, and the first side wall 101 serves as a windward surface.

[0075] For example, the second side wall 102 is concave inwardly toward the first side wall 101 to form a depression, and at least a part of the filling nozzle 501 is arranged in the depression, so that the second side walls 102 on both sides of the filling nozzle 501 form a shoulder design, which reserves an appropriate volume margin for the filling of the phase change material, helps to alleviate the deformation of the cold storage plate caused by the volume change of the phase change material, and ensures the structural integrity and service life of the cold storage plate.

[0076] Illustratively, the cold plate 100 further includes a sealing cover, which can seal the filling nozzle 501 .

[0077] In some embodiments, Figures 1 to 4 As shown, the cold storage plate 100 further includes a plurality of fins 401 , and the fins 401 are at least arranged on a surface of the third side wall 103 away from the accommodating cavity 100q , and the plurality of fins 401 are staggeredly arranged.

[0078] For example, the side of the cold storage plate 100 facing the cargo (the third side wall 103 faces the cargo, and the third side wall 103 is adjacent to the cargo) is arranged with staggered fins 401, which not only increases the heat exchange area, but also significantly improves the surface heat exchange efficiency by continuously destroying the air flow boundary layer.

[0079] For example, the provision of fins 401 can significantly enhance heat transfer performance.

[0080] For example, multiple fins 401 are staggered, and the fins 401 are staggered on the upper surface of the cold storage plate 100, which not only effectively increases the contact area between the air and the surface of the fins 401 and improves the heat exchange efficiency, but also breaks the boundary layer of the flow by continuously changing the flow path of the air, thereby further enhancing the heat exchange rate between the air and the fins 401.

[0081] For example, further, the first baffle 201, the second baffle 301, the fin 401 and the shell 100K are an integrally formed structure.

[0082] In some embodiments, Figures 1 to 4 As shown, the orthographic projection of the fin 401 on the third side wall 103 is an ellipse, and the length direction of the ellipse is parallel to the first direction X; the fin 401 is a hollow structure, and the fin 401 and the shell 100K are an integrally formed structure.

[0083] For example, the orthographic projection layer of fin 401 on the third side wall 103 is elliptical, that is, fin 401 is an elliptical fin. The structure of the elliptical fin can stimulate the continuous regeneration of the flow boundary layer, greatly enhancing the heat transfer performance, and at the same time, it is also superior to other types of fins such as louver-type fins in terms of resistance characteristics.

[0084] For example, in some embodiments, the fin 401 is designed as an internal hollow structure, and the internal hollow structure of the fin 401 is connected to the accommodating cavity 100q. The fin 401 and the shell 100K are manufactured using an integrated molding technology, which further increases the volume of the accommodating cavity 100q, that is, increases the filling amount of the phase change material.

[0085] For example, the fins 401 are staggered on the side wall of the cold storage plate 100, at least in two rows, and the layout can be rectangular, triangular or trapezoidal with a gradient fin density.

[0086] For example, in some embodiments, Figure 3 As shown, the number or density of the fins 401 per unit area gradually increases from the first side wall 101 to the second side wall 102 (from the windward surface to the direction away from the windward surface).

[0087] For example, in some embodiments, Figure 3 As shown, during the cold charging process, if the cold storage plate 100 is long (the length in the first direction X is longer), when the air starts to flow through the fins 401 from the front end (windward side) of the cold storage plate 100, it will continuously exchange heat with the fins 401, resulting in the air temperature reaching the rear end (the end away from the windward side) to be higher than the front end. This will cause the heat exchange effect at the rear end to be inferior to that at the front end at the same fin 401 density, thereby causing the freezing rate of the phase change material at the front and rear ends of the cold storage plate 100 to be inconsistent, and the overall temperature distribution of the cold storage plate 100 to be uneven. In order to solve this problem, in some embodiments of the present application, a strategy of arranging the fins 401 with a gradual density may be adopted, that is, the number or density of the fins gradually increases from the front end to the rear end of the cold storage plate 100. For example, a triangular arrangement (such as Figure 3 As shown), trapezoidal arrangement or any other irregular arrangement, so as to compensate for the influence of the increase of air temperature along the way, ensure the uniformity of temperature distribution of the entire cold storage plate 100 during the cold charging process, and then optimize the freezing rate of the phase change material and the comprehensive thermal performance of the cold storage plate.

[0088] For example, in some embodiments, Figure 3 and Figure 4As shown, after a period of low-temperature air circulation, the cold storage plate 100 is completely charged with cold, and the cargo can be loaded and the air cooler can be turned off. During transportation, the phase change material in the cold storage plate 100 absorbs heat by melting and releases cold energy to control and maintain the temperature stability in the refrigeration device. For the cold storage plate installed on the roof, the surface of the fin 401 faces downward, and the heat transfer direction is from bottom to top. In this process, the phase change material closest to the surface of the fin 401 begins to melt first. The melting of this part of the phase change material is non-constrained melting. The gravity of the unmelted solid is greater than the buoyancy given by the melted liquid phase, so the solid is squeezed downward, causing the liquid to climb upward from the left and right sides of the cold storage plate 100 (close to the first side wall 101 and the second side wall 102). When the liquid rises to a certain height, it will be affected by gravity and will wash down the solid phase change material on both sides. This process is accompanied by a certain degree of convective heat transfer, which promotes the uniform melting of the phase change material and helps to maintain the uniformity and stability of the temperature in the car.

[0089] For example, in some embodiments, Figure 3 and Figure 4 As shown, when the phase change material in the non-constrained melting zone is completely melted, the area above the second baffle 301, that is, the area far from the surface of the fin 401, is transformed into a constrained melting zone. In this area, the heat transfer needs to be conducted through the liquid film formed below and through the low thermal conductivity (about 0.3W·m -1 ·K -1 ). When the phase change material in this area begins to melt, the solid phase change material is confined between the second baffles 301 or between the second baffle 301 and the shell surface, surrounded by liquid, and there is almost no squeezing effect, resulting in the degree of convective heat transfer being much lower than heat conduction. Therefore, when the cold storage plate 100 is placed on top, the non-constrained melting zone constructed by the second baffle 301 and the constrained melting zone work together to achieve a differentiated cooling rate of the phase change material, thereby controlling the cooling rate while maintaining the temperature stability in the car.

[0090] For example, in some embodiments, Figure 3 and Figure 4 As shown, for the side-mounted cold storage plate, the analysis process is similar to that of the top-mounted one, but the first baffle 201 and the second baffle 301 work together, and the melting process of the phase change material away from the surface of the fin 401 and restricted by the two baffles belongs to constrained melting, and its heat transfer rate is significantly lower than the melting rate of the phase change material in the non-constrained melting zone. This also realizes the step-by-step cooling of the phase change material, effectively controls the cooling rate, and ensures the uniformity and stability of the temperature in the car.

[0091] In some embodiments of the present application, on the first hand, the cold storage plate 100 includes an arc-shaped windward surface (first side wall 101) facing the air cooler, and a filling nozzle and a sealing cover located on the other side of the shell 100K (second side wall 102). On the second hand, the upper surface of the cold storage plate 100 adopts a staggered fin 401 design, and the internal space of the shell 100K (accommodating chamber 100q) integrates the first baffle 201 and the second baffle 301 that are interconnected. Among them, the design of the arc-shaped windward surface helps to mitigate the impact of air flow, making the airflow more uniform and smooth, and optimizing the heat exchange performance of the cold storage plate 100. The staggered arrangement of the elliptical fins 401, based on the simplified concept of the heat exchanger enhanced heat transfer structure, effectively improves the cold filling rate of the cold storage plate 100. The first baffle 201 and the second baffle 301 inside the cold storage plate 100 can not only realize the step-by-step cooling of the phase change material and ensure the stable supply of the cooling amount, but also extend the cooling time of the cold storage plate 100. The close connection between the first baffle 201 and the shell 100K gives the cold storage plate 100 a stronger structural strength and plays a supporting role. The opening design (the first opening and the second opening 301k) also takes into account the practicality in actual operation, avoiding the blockage problem caused by excessive viscosity when filling the phase change material, and ensuring the smooth use and maintenance of the cold storage plate 100.

[0092] The present application also provides a refrigeration device, which includes any one of the above-mentioned cold storage plates 100.

[0093] By way of example, the refrigeration device may be a refrigerated truck, but is not limited thereto.

[0094] For example, the cold storage plate 100 is firmly mounted on the top or side wall of the refrigeration device by means of a snap-on structure, etc., ensuring its firmness during transportation. The arc-shaped windward surface faces the air cooler in the vehicle, and the surface of the fin 401 (the surface of the fin 401 away from the fourth side wall 104) faces the goods in the vehicle. During the low-peak electricity price period at night, when the refrigeration device is in an unloaded state, the air cooler in the vehicle is started, and the cold air is guided through the arc-shaped windward surface and flows upward to the surface of the fin 401 of the cold storage plate 100. Under the action of the staggered fins 401, the flow state of the air becomes more turbulent, which significantly improves the convective heat transfer coefficient. In addition, the interior of the fin 401 is a hollow structure, and the hollow structure inside the fin 401 is connected to the accommodating cavity 100q, which not only increases the heat exchange area of ​​the cold storage plate 100, but also the fin 401, as an extended surface, further accelerates the cold charging process, effectively improves the cold charging rate of the cold storage plate 100, and provides sufficient cold reserve for subsequent cargo refrigeration.

[0095] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A cold storage plate, characterized in that: include: A shell, comprising a receiving cavity, the shell comprising a first side wall and a second side wall arranged opposite to each other in a first direction, and a third side wall and a fourth side wall arranged opposite to each other in a second direction, wherein the first direction is perpendicular to the second direction; at least two first baffles, arranged in parallel along the first direction and arranged between the third side wall and the fourth side wall at intervals, the two ends of the first baffles being arranged in contact with the third side wall and the fourth side wall respectively, and the first baffles being provided with a plurality of first openings; At least two second baffles are arranged in parallel along the second direction and are disposed between the first side wall and the second side wall at intervals, and a plurality of second openings are disposed on the second baffles.

2. The cold storage plate according to claim 1, characterized in that: The length of the shell in the first direction is greater than the length of the shell in the second direction; The second baffle is spaced apart from both the first side wall and the second side wall.

3. The cold storage plate according to claim 1, characterized in that: The first baffle and the shell are integrally formed.

4. The cold storage plate according to claim 1, characterized in that: In the first direction, the second baffle includes a middle portion and a first end portion close to the housing, and a first transition portion between the middle portion and the first end portion; The density of the second openings per unit area of ​​the middle portion is greater than the density of the second openings per unit area of ​​the first transition portion; The density of the second openings per unit area of ​​the first end portion is greater than the density of the second openings per unit area of ​​the first transition portion.

5. The cold storage plate according to claim 4, characterized in that: The size of the second opening in the middle portion is smaller than the size of the second opening in the first end portion; The number of the second openings per unit area of ​​the middle portion is greater than the number of the second openings per unit area of ​​the first end portion.

6. The cold storage plate according to claim 1, characterized in that: The outer surface of the first side wall is the windward surface, the second baffle includes a first portion close to the first side wall, and a second portion close to the second side wall, and the density of the second openings per unit area of ​​the first portion is greater than the density of the second openings per unit area of ​​the second portion.

7. The cold storage plate according to claim 1, characterized in that: The outer surface of the first side wall is a windward surface, and the outer surface of the first side wall is arranged in an arc shape; The cold storage plate further includes a filling nozzle, and the filling nozzle is arranged on the second side wall.

8. The cold storage plate according to claim 1, characterized in that: Also includes: A plurality of fins are at least arranged on a surface of the third side wall away from the accommodating cavity, and the plurality of fins are arranged in a staggered manner.

9. The cold storage plate according to claim 8, characterized in that: The orthographic projection of the fin on the third side wall is an ellipse, and the length direction of the ellipse is parallel to the first direction; The fin is a hollow structure, and the fin and the shell are an integrally formed structure.

10. A refrigeration device, characterized in that: The invention comprises the cold storage plate according to any one of claims 1 to 9.

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