Cold storage plate and refrigerator car

Abstract

The invention relates to a cold storage plate and a refrigerator car, the cold release time can be prolonged, the cold storage plate comprises a plate body, the plate body is provided with a containing cavity and a filling nozzle, the filling nozzle is used for filling a phase change material into the containing cavity, the plate body comprises a top wall and a bottom wall in the first direction, and fins used for heat exchange are arranged on the outer wall face of the top wall; the plate body is provided with a containing cavity, the first baffles are fixed in the containing cavity and arranged at intervals in the first direction, intervals are formed between every two adjacent first baffles, intervals are formed between the first baffles and the top wall and the bottom wall of the plate body, and intervals are formed between the first baffles and the side walls of the plate body.

Description

Technical Field

[0001] The present application relates to an invention in the field of phase change cold storage technology, and in particular to a cold storage plate and a refrigerated truck. Background Art

[0002] In most cold chain logistics transportation or distribution processes, the most commonly used means of transportation is refrigerated trucks. According to the different cooling methods, refrigerated trucks can be divided into mechanical, cold storage, LNG (liquefied natural gas) and liquid nitrogen / dry ice types. Among them, cold storage refrigerated trucks are provided with cold storage plates. The cold storage agent (phase change material) filled in the cold storage plate absorbs or releases latent heat to maintain a constant temperature when the phase changes, so as to maintain the temperature of the car within a suitable temperature range for cargo storage. Since the phase change process can be driven by the external temperature and is reversible, the cold storage plate can be used repeatedly. In the policy background of time-of-use electricity prices, this method has the characteristics of energy saving, low cost and long life cycle compared with other cooling methods, so it has broad application prospects.

[0003] For refrigerated trucks, under the condition of a certain quality of the cold storage plate, the cold storage capacity should be as large as possible to extend the cooling time and ensure the temperature inside the vehicle is stable, and the charging time should be as short as possible to reduce the energy consumption of the refrigeration equipment and reduce the cargo transit cycle. Therefore, the common response method in the cold storage refrigerated truck industry is to prepare a large number of completely frozen cold storage plates in advance when charging the cold storage plates to avoid the cold storage plates not being fully charged within the specified time; and to continuously replace the cold storage plates that have been exhausted during transportation to avoid the cold storage plates cooling too quickly and causing temperature fluctuations inside the vehicle. The above method wastes a lot of frequent manual operations and does not solve the problem of charging and discharging the cold storage plates from the root. Summary of the invention

[0004] Based on this, it is necessary to propose a cold storage plate that can control the cooling rate. In addition, a refrigerated vehicle is also proposed.

[0005] According to a first aspect of the present application, a cold storage plate comprises: a plate body, the plate body having a accommodating cavity and a filling nozzle, the filling nozzle being used to fill phase change material into the accommodating cavity, the plate body comprising a top wall and a bottom wall in a first direction, the outer wall surface of the top wall being provided with fins for heat exchange; and at least one first baffle fixed in the accommodating cavity and arranged at intervals in the first direction, there being intervals between two adjacent first baffles, between the first baffle and the top wall and the bottom wall of the plate body, and there being intervals between the first baffle and the side wall of the plate body.

[0006] In some embodiments, the first baffle is provided with a first through hole along the first direction.

[0007] In some embodiments, the cold storage plate also includes at least one second baffle arranged at intervals in a second direction, the second direction is perpendicular to the first direction, the second baffle is vertically cross-connected to the first baffle, at least one of the second baffle and the first baffle is connected to the plate body, and there is a gap between the second baffle and the side wall of the plate body.

[0008] In some embodiments, the second baffle is provided with a second through hole along the second direction.

[0009] In some embodiments, the plate body is provided with a windward surface on one side in a third direction, and the third direction is parallel to the top wall; and the outer wall surface of the top wall is provided with at least one fin in the third direction.

[0010] In some embodiments, the windward surface is an arc surface, and a diameter of the arc surface is equal to a thickness of the plate body in the first direction.

[0011] In some embodiments, each of the fins is provided with a through hole along the third direction.

[0012] In some embodiments, the distribution density of the fins gradually increases along the third direction and away from the windward surface; and / or, along the third direction, a plurality of the fins are arranged into multiple rows, and the fins of two adjacent rows are staggered in the third direction.

[0013] In some embodiments, the filling nozzle is concavely arranged on the outer wall surface of the side wall of the plate body, and the plate body forms shoulders on both sides of the filling nozzle.

[0014] According to a second aspect of the present application, a refrigerated vehicle comprises the above-mentioned cold storage plate.

[0015] In the present application, a first baffle is built into the cold storage plate, and a constrained melting area and a non-constrained melting area of ​​the phase change material can be constructed on both sides of the first baffle, thereby causing a step-by-step cooling of the phase change material, which can simultaneously maintain the car temperature and extend the circulation period of the cold storage plate, thereby solving the problem of frequent replacement of the cold storage plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the overall assembly structure of a cold storage plate according to an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Top view of the cold storage plate.

[0018] Figure 3 for Figure 2 Middle AA section view.

[0019] Figure 4 for Figure 2Middle BB section view.

[0020] Figure 5 The figure is a schematic diagram of the relative position relationship between the first baffle and the second baffle in the cold storage plate of the present invention.

[0021] Figure 6 It is a top view schematic diagram of another arrangement of the fins of the cold storage plate of the present invention.

[0022] Description of reference numerals:

[0023] 100, cold storage plate; 10, plate body; 101, shoulder; 110, accommodating chamber; 120, filling nozzle; 130, top wall; 140, bottom wall; 150, fin; 160, side wall; 161, windward surface; 20, sealing cover; 30, first baffle; 310, first through hole; 410, first interval; 420, second interval; 50, second baffle; 510, second through hole. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] As described in the background technology, the existing cold storage plate cools too quickly, causing temperature fluctuations in the vehicle. However, the existing solution wastes a lot of frequent manual operations and does not solve the problem of cold storage plate cooling from the root.

[0031] Specifically, the cold storage plate of a cold storage refrigerated truck should have a fast charging rate, and a slow cooling rate while maintaining the temperature inside the vehicle. The applicant's research found that the heat flux density at the solid-liquid interface during the cold storage plate charging process decreases with the extension of the charging time. This is because the solid volume continues to increase with time, resulting in an increase in the thermal conductivity and thermal resistance of this area, and thus the charging rate tends to be fast first and then slow. During the cooling process, the phase change material melts and changes from a solid to a liquid state. As time goes by, the liquid phase volume fraction continues to increase. Due to the solid-liquid density difference, the degree of natural convection in the cold storage plate also increases. However, the thickness of the liquid film on the side close to the heat source also accumulates, and the thermal conductivity and thermal resistance of the thick liquid film continue to increase. Therefore, the speed of the cooling rate depends on whether natural convection or heat conduction in the cold storage plate is dominant.

[0032] The applicant further discovered that during the cooling process, the melting process of the phase change material in the cold storage plate is divided into two modes: constrained melting and unconstrained melting. Constrained melting refers to the inability of the solid phase change material to move due to obstructions such as the wall surface and the fin surface, causing the liquid film thickness at the heating surface to continue to grow, and the solid-liquid interface continues to move away from the heating surface. Unconstrained melting refers to the free movement of the solid phase change material in the container. Usually, because the density of the solid phase is greater than the density of the liquid phase, the remaining unmelted solid continues to squeeze the liquid phase under the drive of gravity, forming local natural convection. The thermal conductivity resistance of the liquid film thickness is large during constrained melting, while natural convection exists in unconstrained melting. Therefore, under the same conditions, the unconstrained melting rate is faster.

[0033] For the cold storage plate with air-cooled charging method, the cold air needs to pass through the surface of the cold storage plate to transfer cold during the charging process, and the hot air in the car also needs to pass through the surface of the cold storage plate to transfer heat during the cooling process. Therefore, the surface structure of the cold storage plate will accelerate the cooling process while enhancing the charging rate.

[0034] In order to extend the cooling time of the cold storage plate and reduce the replacement frequency, based on the dynamic melting characteristics of the phase change material in the container mentioned above, the present application proposes a cold storage plate that can realize the step-by-step cooling of the phase change material, so as to achieve the mutual coordination of maintaining the temperature in the vehicle and extending the cooling time.

[0035] refer to Figures 1 to 5 In a first aspect, an embodiment of the present application provides a cold storage plate 100 , comprising a plate body 10 and at least one first baffle 30 fixed in a receiving cavity 110 of the plate body 10 .

[0036] The plate body 10 has a receiving cavity 110 and a filling nozzle 120 , and the filling nozzle 120 is used to fill the phase change material (not shown) into the receiving cavity 110 . Further, the cold storage plate 100 also includes a sealing cover 20 , and the sealing cover 20 is used to close the filling nozzle 120 . Figure 1 In the embodiment, the sealing cover 20 and the filling nozzle 120 are in a separated state.

[0037] The plate body 10 includes a top wall 130 and a bottom wall 140 in the first direction Z. The outer wall surface of the top wall 130 is provided with fins 150 for heat exchange. The cold storage plate 100 of the present application can be charged with cold by the fins 150 in an air-cooling manner.

[0038] The plate body 10 is a hollow shell with a certain thickness. In one example, the plate body 10 is made of high-density polyethylene (HDPE) with a thickness of 1-2 mm to avoid excessive thermal resistance. The shape of the plate body 10 is not limited. In this embodiment, the plate body 10 is a rectangular parallelepiped. In other embodiments, the plate body 10 may also be a disc, etc. When the cold storage plate 100 is applied to a refrigerated truck, the plate body 10 and the refrigerated truck can be detachably connected by a snap-fit ​​method.

[0039] At least one first baffle 30 is arranged at intervals in the first direction Z. There is an interval between two adjacent first baffles 30, between the first baffle 30 and the top wall 130 and the bottom wall 140 of the plate body 10 in the first direction Z, and there is an interval between the first baffle 30 and the side wall 160 of the plate body 10. In the present application, the first direction Z is specifically the thickness direction of the plate body 10, which is the distance between the outer wall surface of the top wall 130 and the outer wall surface of the bottom wall 140.

[0040] The first baffle 30 is specifically configured such that its surface in the thickness direction is parallel to the top wall 130 and the bottom wall 140 of the plate body 10. In this embodiment, the number of the first baffles 30 is specifically two. The two first baffles 30 are respectively close to the top wall 130 and the bottom wall 140. Figures 3 to 5 As shown, there is a gap between the two first baffles 30, a first gap 410 is provided between the lower first baffle 30 and the bottom wall 140, and a second gap 420 is provided between the upper first baffle 30 and the top wall 130. It can be understood that when only one first baffle 30 is provided, there is a first gap 410 between it and the top wall 130, and there is a second gap 420 between it and the bottom wall 140.

[0041] There is a gap between the first baffle 30 and the side wall 160 of the plate body 10. The side wall 160 here refers to the wall connecting the top wall 130 and the bottom wall 140 in the plate body 10. There is a gap between the first baffle 30 and the side wall 160 of the plate body 10, which means that there is a gap between at least one side of the first baffle 30 in the circumferential direction and the side wall 160 of the body. In an example, there is a gap between the first baffle 30 and each side wall 160 of the plate body 10 in the circumferential direction.

[0042] The cold storage plate 100 of this embodiment can realize the step-by-step cooling of the phase change material by disposing the above-mentioned first baffle 30 in the accommodating cavity 110 of the plate body 10, which is described in detail below.

[0043] After the cold storage plate 100 is charged with cold, the phase change material is converted into a solid, and the cold storage plate 100 can be placed in the compartment of a refrigerated truck as a top cold storage plate 100. During transportation, the phase change material in the cold storage plate 100 melts and absorbs heat to release cold energy, thereby controlling and maintaining the compartment temperature.

[0044] Specifically, the top wall 130 of the cold storage plate 100 with fins 150 faces downward, and the heat transfer direction is from bottom to top. The heat is transferred upward through the fins 150 and the top wall 130. The phase change material that first contacts the top wall 130 begins to melt, and the phase change material in this area is non-constrained melting. The gravity on the unmelted solid is greater than the buoyancy given by the molten liquid phase. The solid is squeezed downward to cause the liquid to climb upward from both sides. At a certain height, the liquid is washed downward by gravity to the solid phase change material on both sides, and there is a certain amount of convective heat transfer. There is a gap between the first baffle 30 and the side wall 160 of the plate body 10, so that when the thickness of the cold storage plate 100 is usually small, the non-constrained range is not only too small, but also able to maintain the temperature inside the refrigerated truck.

[0045] When the phase change material in the non-constrained melting area melts, the side above the first baffle 30, that is, away from the top wall 130, belongs to the constrained melting area. At this time, the heat needs to be transferred to the solid phase change material above through the heat conduction of the liquid film below and the heat conduction of the first baffle 30. For example, the first baffle 30 is made of HDPE material. The thermal conductivity of HDPE material is low, only 0.3 When the phase change material in this area melts, the solid is confined between the two first baffles 30 and between the first baffle 30 and the bottom wall 140. The first baffle 30 is surrounded by liquid on the back, and the squeezing effect is very small, and the degree of convective heat transfer is much smaller than heat conduction. Therefore, when used as a top cold storage plate 100, the non-constrained melting area and the constrained melting area constructed by the first baffle 30 can be used to achieve different cooling rates of the phase change material.

[0046] In the above, the first baffle 30 is described as being made of HDPE material. It is understandable that the material of the first baffle 30 is not limited thereto, as long as the first baffle 30 can constrain the melting of the phase change material above the first baffle 30 .

[0047] In some embodiments, the first baffle 30 is provided with a first through hole 310 along the first direction Z. The first through hole 310 plays a role in regulating heat transfer. Specifically, when the phase change material melts, part of the melted liquid can flow to the constraint area through the hole to accelerate heat transfer. In other words, the constraint strength of the constrained melting area can be adjusted by the number and area of ​​the first through holes 310.

[0048] In addition, the first through hole 310 can also avoid clogging when the phase change material is filled, that is, avoid clogging due to high viscosity of the phase change material, so that the phase change material can be smoothly filled between the first baffles 30 .

[0049] In some embodiments, reference Figures 3 to 5The cold storage plate 100 also includes at least one second baffle 50 arranged at intervals in a second direction X, the second direction X is perpendicular to the first direction Z, the second baffle 50 is vertically cross-connected with the first baffle 30, at least one of the second baffle 50 and the first baffle 30 is connected to the plate body 10, and there is a gap between the second baffle 50 and the side wall 160 of the plate body 10.

[0050] The second direction X is perpendicular to the first direction Z. In this embodiment, the plate body 10 is a cuboid; the first direction Z is a thickness direction of the plate body 10 , and the second direction X is a width direction of the plate body 10 .

[0051] The second baffle plate 50 is vertically cross-connected with the first baffle plate 30, and the top of the second baffle plate 50 is connected to the top wall 130 of the plate body 10, and the bottom of the second baffle plate 50 is connected to the bottom wall 140 of the plate body 10. In this way, the second baffle plate 50 serves as a supporting structure of the plate body 10 of the cold storage plate 100 and as a supporting structure of the second baffle plate 50, thereby enhancing the strength of the cold storage plate 100.

[0052] In one example, the plate body 10, the first baffle 30 and the second baffle 50 can be formed by 3D printing, and the cold storage plate has good structural strength. It is easy to understand that the size of the first baffle 30 and the size of the second baffle 50 change with the outer size of the cold storage plate 100.

[0053] In this embodiment, the number of the second baffles 50 is specifically two. By providing at least one second baffle 50, the cold storage plate 100 can be used as a top cold storage plate 100 as well as a side cold storage plate 100, as described in detail below.

[0054] When the cold storage class is used as a side cold storage plate 100, the top wall 130 is arranged on one side of the vehicle compartment in the vertical direction. The top wall 130 faces the interior space of the vehicle compartment. At this time, the principle that the phase change material first melts in a non-constrained manner and then melts in a constrained manner is the same as when it is used as a top cold storage plate 100. The phase change material confined between the second baffle 50 and the side wall 160 of the plate body 10, and the phase change material confined between the area enclosed by the first baffle 30 and the second baffle 50 belong to constrained melting, and the heat transfer rate is lower than the melting heat transfer rate of the phase change material in the non-constrained melting area. Similarly, there is a gap between the second baffle 50 and the side wall 160 of the plate body 10, so that when the thickness of the cold storage plate 100 is usually small, the non-constrained range is not only too small, but also able to maintain the temperature inside the refrigerated truck.

[0055] Furthermore, the second baffle 50 is provided with a second through hole 510 along the second direction X. The second through hole 510 is similar to the first through hole 310 and can adjust the restraining force of the restrained melting area and avoid blockage when the phase change material is injected.

[0056] The number of the first through holes 310 and the second through holes 510 is at least one row, and the aperture size is determined by the viscosity of the phase change material and the size of the plate body 10, as well as the adjustment requirements for the restraint strength of the restrained melting area. That is, according to the characteristic size of the cold storage plate 100 and the requirements for the cooling amount and cooling time, the size and aperture size of the first baffle 30 and the second baffle 50 can be flexibly changed, so as to divide the restrained melting area and the non-restrained melting area into different proportions, and achieve different degrees of step cooling effect.

[0057] For refrigerated trucks, when the mass of the cold storage plate 100 is certain, the cold storage capacity should be as large as possible to extend the cooling time and ensure the temperature inside the vehicle is stable, and the charging time should be as short as possible to reduce the energy consumption of the refrigeration equipment and reduce the cargo transit cycle. In the prior art, a large number of completely frozen cold storage plates 100 are prepared as spare parts, and the cold storage plates 100 that have been exhausted are continuously replaced during transportation to avoid the cold storage plates 100 cooling too quickly and causing temperature fluctuations inside the vehicle. This method wastes a lot of frequent manual operations and does not solve the problem of charging and discharging the cold storage plates 100 from the root.

[0058] Common cooling methods for the cold storage plate 100 include liquid cooling and air cooling. The liquid cooling method requires the cold storage plates 100 to be interconnected, while the air cooling cold storage plates 100 are independent of each other and easy to disassemble. However, due to the low thermal conductivity of air, the air cooling has a slower cooling rate than liquid cooling, so it is of great significance to strengthen the air cooling charging rate of the cold storage plate 100.

[0059] The applicant has found that the method of increasing the cold storage plate 100 charging rate can refer to the heat transfer enhancement structure of the heat exchanger. According to Newton's cooling law, enhanced heat exchange can only be achieved by increasing the heat transfer coefficient, increasing the heat transfer area, and increasing the average heat transfer temperature difference. However, objective conditions restrict the changes in the heat transfer area and the heat transfer temperature difference, so increasing the heat transfer coefficient is the most widely used. Common heat transfer enhancement structures in heat exchangers include: changing the tube type (circular tube, elliptical tube, flat tube, special-shaped tube, etc.), adding fins (straight fins, corrugated fins, louver fins, slit fins, etc.) and constructing vortex generators (rectangular, triangular, trapezoidal, airfoil, etc.). The design of these structures aims to increase the heat exchange area while changing the flow state of the fluid, causing disturbances to the fluid to interrupt the fluid boundary layer, thereby obtaining superior heat transfer performance.

[0060] Based on the above research, in some embodiments of the present application, the plate body 10 is provided with a windward surface 161 on one side in the third direction Y, and the third direction Y is parallel to the top wall 130; the outer wall surface of the top wall 130 is provided with at least one fin 150 for heat exchange in the third direction Y. The third direction Y is specifically the length direction of the plate body 10, which is perpendicular to the first direction Z and the second direction X.

[0061] When the cold storage plate 100 is used, the windward surface 161 faces the side of the cold air blower of the refrigerated truck. The cold air blown out by the cold air blower rises along the windward surface 161, and then the cold air moves along the outer wall surface of the top wall 130 in the third direction Y, and exchanges heat with at least one fin 150 and the top wall 130 in sequence. The fin 150 as an extended surface can increase the heat exchange area and improve the cold charging rate of the cold storage plate 100. Therefore, the cold storage plate 100 of the present application can be used in a cold storage refrigerated truck using air as the heat exchange medium, and can achieve the compatible goals of rapid cold charging and step-by-step cooling of the cold storage plate 100.

[0062] In one example, in the present application, the windward surface 161 and the fins 150 can be integrally formed with the plate body 10 .

[0063] In one example, the windward surface 161 is an arc surface, and the diameter of the arc surface can be equal to the thickness of the plate body 10. The arc-shaped windward surface 161 can reduce the impact of the wind on the windward surface 161, so that the cold air flows evenly and smoothly to the outer wall surface of the top wall 130 of the plate body 10, and fully contacts and exchanges heat with the outer wall surface of the top wall 130. In other words, the arc-shaped windward surface 161 is conducive to the continuity of air flow distribution, so that the air and the surface of the cold storage plate 100 are fully in contact and heat transfer, which can increase the cold charging rate of the cold storage plate 100 and reduce the energy consumption of the cold air machine.

[0064] In one example, a side wall 160 of the plate body 10 in the third direction Y is bent into an arc shape, so that the outer wall surface of the side wall 160 forms an arc-shaped windward surface 161 .

[0065] In one example, each fin 150 is provided with a through hole along the third direction Y. That is, the fin 150 is hollow inside and penetrates through the plate body 10 in the length direction without sealing. The fin 150 is hollow inside, and the inner wall of the through hole can be further used as an extended surface to increase the heat exchange area of ​​the cold storage plate 100; and when the cold air flows along the third direction Y, it can flow smoothly from one side of the plate body 10 to the other side, thereby improving the heat exchange rate.

[0066] In some embodiments, along the third direction Y, the plurality of fins 150 are arranged into a plurality of rows, and the fins 150 in two adjacent rows are staggered in the third direction Y.

[0067] like Figure 2 As shown, the plurality of fins 150 are arranged in a staggered pattern on the outer wall surface of the top wall 130 of the plate body 10, which can not only increase the heat exchange area between the air and the surface, but also because the staggered pattern constantly disturbs the air flow state, interrupts the air flow boundary layer, increases the turbulence of the air, and increases the convective heat transfer coefficient, thereby improving the heat exchange rate of the surface. The number of the plurality of fins 150 is at least two rows, and the arrangement shape can be a regular rectangle or a triangle (such as Figure 6 as shown) or trapezoidal.

[0068] The fins 150 are arranged at equal intervals along the length direction and the width direction of the plate body 10 , and the distances between the two directions can be determined according to the characteristic dimensions of the plate body 10 .

[0069] When the cold storage plate 100 is long, cold air flows from the front side of the cold storage plate 100 (the side close to the windward surface 161) through the outer wall surface of the top wall 130 and continuously exchanges heat, and the air temperature on the rear side (the side away from the windward surface 161) rises, which may cause different freezing rates of the front and rear phase change materials and uneven temperature of the cold storage plate 100.

[0070] To this end, in some embodiments, the distribution density of the fins 150 gradually increases along the third direction Y and away from the windward surface 161. That is, the farther away from the windward surface 161, the greater the density of the fins 150 and the greater the number of the fins 150. With this design, along the third direction Y and away from the windward surface 161, the heat exchange efficiency between the cold air and the top wall 130 is gradually improved, which can ensure that the freezing rate of the front and rear phase change materials is consistent and the temperature of the cold storage plate 100 is uniform after being charged with cold.

[0071] like Figure 6 As shown, the arrangement of the plurality of fins 150 is a triangle with variable density. The arrangement of the plurality of fins 150 can also be a trapezoidal or irregular shape.

[0072] In this embodiment, fins 150 are provided on the outer wall surface of the top wall 130. The fins 150, as the extended surface of the outer wall surface of the top wall 130, can increase the heat exchange area and improve the cold charging rate of the cold storage plate 100. The use of the fins 150 allows: the size, quantity and spacing of the serrated fins 150 can be reasonably changed according to the different temperatures and speeds of the air in different refrigerated vehicles and the differences in time-of-use electricity price policies in different regions. The variable density arrangement shape of the serrated fins 150 can also be changed according to the size characteristics of the cold storage plate 100 and the different air flow rates at the front and rear ends, so as to achieve the effect of rapid and balanced cold charging of the cold storage plate 100.

[0073] In some embodiments, the filling nozzle 120 is concavely disposed on the outer wall surface of the side wall 160 of the plate body 10, and the plate body 10 of the cold storage plate 100 forms shoulders 101 on both sides of the filling nozzle 120. The size of the sealing cover 20 matches the filling nozzle 120 to achieve a good seal. In one example, the filling nozzle 120 is on the side opposite to the windward surface 161.

[0074] The filling nozzle 120 is concavely arranged, so that the plate body 10 of the cold storage plate 100 forms shoulders 101 on both sides of the filling nozzle 120. The shoulders 101 can leave a certain margin for the filling amount of the phase change material and reduce the deformation of the cold storage plate 100.

[0075] In a second aspect, the embodiment of the present application provides a refrigerated vehicle, comprising a cold storage plate 100 of any of the above embodiments. The cold storage plate 100 can be fixed to the top or side wall 160 of the refrigerated vehicle by a buckle structure. The fins 150 face the cargo in the vehicle.

[0076] In the refrigerated vehicle of this embodiment, the cold storage plate 100 has a built-in first baffle 30 and / or second baffle 50, which can realize the step-by-step cooling of the phase change material, ensure the cooling capacity while extending the cooling time of the cold storage plate 100, and achieve the coordination between maintaining the temperature in the vehicle and extending the cooling time. Thus, the problem of frequent replacement of the cold storage plate 100 is solved.

[0077] In this embodiment, the windward surface 161 of the cold storage surface faces the in-vehicle cooling fan. During the off-peak hours at night, when the refrigerated truck is unloaded, the in-vehicle cooling fan can be turned on to charge the cold storage plate 100, which can improve the charging rate of the cold storage plate 100 to a certain extent and solve the problem that a large number of spare cold storage plates 100 need to be stored in advance in cold storage refrigerated trucks.

[0078] Finally, it should be noted that the various technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the various 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.

[0079] 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, It is characterized in that include: A plate body, wherein the plate body has a receiving cavity and a filling nozzle, wherein the filling nozzle is used to fill the phase change material into the receiving cavity, wherein the plate body comprises a top wall and a bottom wall in a first direction, and an outer wall surface of the top wall is provided with fins for heat exchange; and At least one first baffle fixed in the accommodating cavity is arranged at intervals in the first direction, there is a gap between two adjacent first baffles, between the first baffle and the top wall and the bottom wall of the plate body, and there is a gap between the first baffle and the side wall of the plate body.

2. The cold storage plate according to claim 1, It is characterized in that The first baffle is provided with a first through hole along the first direction.

3. The cold storage plate according to claim 1, It is characterized in that The cold storage plate also includes at least one second baffle arranged at intervals in a second direction, the second direction is perpendicular to the first direction, the second baffle is vertically cross-connected with the first baffle, at least one of the second baffle and the first baffle is connected to the plate body, and there is a gap between the second baffle and the side wall of the plate body.

4. The cold storage plate according to claim 3, It is characterized in that The second baffle is provided with a second through hole along the second direction.

5. The cold storage plate according to claim 1, It is characterized in that The plate body is provided with a windward surface on one side in a third direction, and the third direction is parallel to the top wall; and the outer wall surface of the top wall is provided with at least one fin in the third direction.

6. The cold storage plate according to claim 5, It is characterized in that The windward surface is an arc surface, and the diameter of the arc surface is equal to the thickness of the plate body in the first direction.

7. The cold storage plate according to claim 5, It is characterized in that Each of the fins is provided with a through hole along the third direction.

8. The cold storage plate according to claim 5, It is characterized in that The distribution density of the fins gradually increases along the third direction and away from the windward surface; and / or, along the third direction, a plurality of the fins are arranged in a plurality of rows, and the fins of two adjacent rows are staggered in the third direction.

9. The cold storage plate according to claim 1, It is characterized in that The filling nozzle is concavely arranged on the outer wall surface of the side wall of the plate body, and the plate body forms shoulders on both sides of the filling nozzle.

10. A refrigerated truck, It is characterized in that include: A cold storage plate as claimed in any one of claims 1 to 9.

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