Mobile fresh-keeping box and cold chain transportation vehicle having the same

Abstract

The present invention provides a mobile fresh-keeping box and a cold chain transport vehicle having the same, wherein the mobile fresh-keeping box includes a cold-requiring unit; a cold storage unit, which is provided with a cold storage medium, wherein the cold storage medium has solid and liquid states, and the fluidity of the cold storage medium in the solid state is worse than the fluidity of the cold storage medium in the liquid state; a cold supply unit, which transmits the liquid cold storage medium to the cold-requiring unit, and transmits the cold storage medium after heat exchange with the cold-requiring unit to the cold storage unit. The present invention can store a large amount of cold in a short time by adding a solid cold storage medium to the cold storage unit, which can meet the needs of pre-cooling and / or fresh-keeping; and transmits the liquid cold storage medium to the cold-requiring unit, and the cold storage medium is a good carrier of cold, which can ensure the cold supply per unit time.

Description

Technical Field

[0001] The invention relates to a mobile fresh-keeping box and a cold chain transport vehicle having the same. Background Art

[0002] Cold chain transportation is one of the key factors in ensuring the freshness and quality of agricultural products.

[0003] In the existing chain transportation, after the agricultural products are picked and collected at the base, they are first transported to the cold storage for pre-cooling, which reduces the high temperature of 30 to 40 degrees in the field to a storage temperature of about 10 degrees Celsius; then the agricultural products are loaded onto refrigerated trucks for transportation. During the transportation process, the role of the refrigerated truck is to keep the pre-cooled fruits warm.

[0004] On the one hand, agricultural products are transported many times, resulting in a high fruit loss rate; on the other hand, cold storage is generally built in places with convenient logistics and transportation, large transformer stations and convenient electricity supply, and is far away from agricultural product bases. Agricultural products usually need to be transported by car for several hours to reach the cold storage, and cannot be pre-cooled and locked in freshness in the first place, affecting the quality and taste. In addition, the existing cold chain transport boxes and refrigerated trucks are all cooled by refrigeration units, while pre-cooling of agricultural products requires a large amount of cold capacity, requiring the power of the refrigeration unit to be at least 80KW. Based on the current compressors, generators, etc., the pre-cooling function cannot be achieved.

[0005] In view of this, it is necessary to provide an improved mobile fresh-keeping box and cold chain transport vehicle. Summary of the invention

[0006] The object of the present invention is to provide a mobile fresh-keeping box and a cold chain transport vehicle having the same.

[0007] In order to solve one of the above technical problems, the present invention adopts the following technical solution:

[0008] A mobile fresh-keeping box comprises a cooling unit; a cooling storage unit for accommodating solid and / or liquid cooling storage media; a cooling supply unit for transferring the liquid cooling storage media to the cooling unit and transferring the cooling storage media after heat exchange with the cooling unit to the cooling storage unit.

[0009] Further, the heat exchanger includes at least one heat exchanger body, or the heat exchanger includes at least one heat exchanger body and at least one heat exchange fan, the heat exchanger body includes heat exchange tubes, or the heat exchanger body includes heat exchange tubes and heat dissipation fins.

[0010] Furthermore, the cooling unit includes a storage box and at least one door for opening or closing the storage box, the heat exchanger is located at the top of the storage box, or the heat exchanger is located on a side of the storage box away from the door, or the heat exchanger is located at one of the doors.

[0011] Furthermore, the cooling unit includes a storage box and at least one door body for opening or closing the storage box, the heat exchanger is located on the top of the storage box, or the heat exchanger is located on a side of the storage box away from the door body, or the heat exchanger is located at one of the door bodies; the heat exchanger includes at least one heat exchanger body and at least one heat exchange fan, and the heat exchange fan is arranged on a side of the heat exchanger body close to the door body.

[0012] Furthermore, the cold storage unit also includes a cold storage box, which includes a first storage area for accommodating solid and / or liquid cold storage media and a second storage area for accommodating liquid cold storage media, the first transmission unit is connected to the second storage area, and the second transmission unit is connected to the first storage area or the second storage area.

[0013] Furthermore, the cold storage unit also includes a cold storage box, which includes a first accommodating area for accommodating solid and liquid, or liquid cold storage media; the first transmission unit and the second transmission unit are both connected to the first accommodating area.

[0014] Furthermore, the second transmission unit includes a reflux pipe located above the first accommodating area, and the reflux pipe is provided with a plurality of reflux ports.

[0015] Furthermore, along the return pipe in a direction from the heat exchanger to away from the heat exchanger, the diameter of the return port increases, and / or the arrangement density of the return port increases.

[0016] A cold chain transport vehicle comprises a vehicle and the above-mentioned mobile fresh-keeping box located on the vehicle.

[0017] The beneficial effects of the present invention are as follows: by adding a solid cold storage medium to the cold storage unit, a large amount of cold can be stored in a short time, which can meet the pre-cooling and / or preservation needs; and the liquid cold storage medium is transmitted to the unit requiring cold, and the cold storage medium is a good carrier of cold, which can ensure the cold supply per unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of a mobile fresh-keeping box of a preferred embodiment of the present invention;

[0019] Figure 2 yes Figure 1 A schematic diagram from another angle, in which a door is omitted to show the internal structure;

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure after removing the box;

[0021] Figure 4 yes Figure 3 A schematic diagram of the structure at another angle;

[0022] Figure 5 yes Figure 2 Schematic diagram from another angle;

[0023] Figure 6 yes Figure 5 Partial magnified image;

[0024] Figure 7 It is a structural schematic diagram of a water tank of the present invention;

[0025] Figure 8 is a schematic structural diagram of a water tank according to another embodiment of the present invention;

[0026] Fig. 9 yes Figure 8 Cross-sectional view along AA direction;

[0027] Fig.10 is a schematic structural diagram of a water tank according to another embodiment of the present invention;

[0028] Fig.11 yes Fig.10 Cross-section along direction BB;

[0029] Fig.12 is a schematic structural diagram of a water tank in another embodiment of the present invention;

[0030] Fig.13 is a schematic diagram of a heat exchanger body and a heat exchange fan in one embodiment of the present invention;

[0031] Fig.14 is a schematic diagram of a heat exchanger body and a heat exchange fan in another embodiment of the present invention;

[0032] Fig.15 is a schematic diagram of a heat exchanger body and a heat exchange fan in another embodiment of the present invention;

[0033] Fig.16 is a schematic diagram of installing a heat exchanger in one embodiment of the present invention;

[0034] Fig.17 It is a schematic diagram of a cold storage unit, a cold supply unit and a discharge unit in one embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. However, the embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on the embodiments are all within the protection scope of the present invention.

[0036] Please refer to Figures 1 to 17FIG. 1 is a preferred embodiment of a mobile fresh-keeping box 100 of the present invention. The mobile fresh-keeping box 100 is used for cold chain transportation and can pre-cool and / or preserve goods.

[0037] The mobile fresh-keeping box 100 includes a cold demand unit 10, a cold storage unit 20, a cold supply unit 30, a discharge unit 40, a humidification unit 50 and an electric control unit 60. The mobile fresh-keeping box 100 can be a whole or assembled from independent modules.

[0038] The cooling unit 10 includes any unit that requires cooling. The cooling unit 10 is a whole, or the cooling unit 10 includes a plurality of sub-cooling units separated by at least one partition structure 11. The cooling supply unit transmits cooling to each sub-cooling unit, and the cooling provided to at least one of the sub-cooling units is independently controlled, so as to realize block cooling and make the use scenario more flexible.

[0039] In the first embodiment, the cooling unit 10 includes a storage box 12 and at least one door 13 for opening or closing the storage box 12. The storage box 12 is a heat preservation box. The storage box 12 is used to store agricultural products, and the cooling unit 30 provides cold air to the storage box 12 to pre-cool and / or preserve the agricultural products.

[0040] Furthermore, the sub-refrigeration unit is a plurality of storage areas 14 formed by dividing the storage box 12 by at least one partition structure 11. On the one hand, after a storage area 14 is filled with goods, the partition structure 11 corresponding to the storage area 14 can be closed, and the refrigeration unit 30 can be started to supply cold to the storage area 14, so as to pre-cool and / or preserve the goods in the storage area 14, thereby achieving pre-cooling and / or preservation before loading. On the other hand, during loading and unloading, the partition structure 11 can effectively prevent the leakage of cold energy in the storage area 14 that has entered the pre-cooling, refrigeration or freezing state, thereby reducing energy consumption. At the same time, the goods can be loaded directly from the source and transported directly to the destination, thereby avoiding the intermediate turnover process of traditional cold chain vehicles and greatly improving transportation efficiency.

[0041] In this embodiment, a plurality of partition structures 11 are arranged at intervals along the longitudinal direction of the storage box 12, and the partition structures 11 are arranged substantially parallel to the door body 13. The plurality of storage areas 14 are filled one by one starting from the storage area 14 farthest from the door body 13, and the goods in a storage area 14 are precooled when a storage area 14 is filled. Of course, in other embodiments, the door body 13 may also be arranged on the side of the storage box 12, so that the door body 13 and the partition structure 11 are arranged vertically.

[0042] In one embodiment, the partition structure 11 is a flexible partition structure, which is simple to set up and flexible and deformable, and has a better use scenario, such as a door curtain. In order to prevent the cold of the storage area 14 from leaking outward, the length of the flexible partition structure in the vertical direction is not less than, preferably greater than, the height of the storage box 12; the width of the flexible partition structure is not less than, preferably greater than, the width of the storage box 12, so as to ensure that the upper and lower sides and the left and right sides of the flexible partition structure can cooperate and seal with the inner wall of the storage box 12 to reduce or seal the gap between the flexible partition structure and the storage box 12, thereby reducing the leakage of cold.

[0043] Furthermore, the length of the flexible partition structure along the vertical direction is set longer. When more goods need to be placed in the storage area 14, the top of the flexible partition structure tilts outward, which can temporarily increase the space of the storage area 14. Preferably, the length of the flexible partition structure along the vertical direction is less than or equal to 1.5 times the height of the storage box 12. If it is too long, it will be stacked at the bottom, causing inconvenience to loading and unloading. If the amount of goods exceeds the volume of the expanded space, the excess part should be placed in the next storage area. More preferably, it is less than or equal to (1+√2) / 2 times the height of the storage box 12, that is, the upper half of the flexible partition structure tilts outward at 45°.

[0044] To further reduce the risk of cold leakage, the left and right sides of the flexible partition structure can be fixed to the inner wall of the storage box 12 by Velcro or magnetic stickers. The bottom of the flexible partition structure does not need to be fixed to the bottom wall of the storage box 12, and the flexible partition structure can be ensured to fit to the bottom wall of the storage box 12 under its own gravity.

[0045] In addition, the material of the partition structure 11 can be selected to be a heat-insulating partition structure according to the type of goods stored in the storage area 14. If the storage area 14 requires a relatively low temperature, such as 0°C or below, the partition structure 11 is preferred. Moreover, when the types of goods in adjacent storage areas 14 are the same or the required storage temperatures are similar, there is no need to use the partition structure 11, and when loading is completed, the temperature balance can be quickly achieved between adjacent storage areas 14 by means of heat exchange. When the goods in adjacent storage areas 14 are different, the corresponding storage temperatures are also different. The use of the partition structure 11 can effectively isolate the heat transfer between adjacent storage areas 14, ensure the temperature stability of each storage area 14, and realize the multi-temperature zone storage function.

[0046] Furthermore, in order to automate the zoned cooling, the electric control unit includes a sensor for detecting whether the storage area 14 is in a closed state. Specifically, the partition structure 11 has an open state for opening the storage area 14 and a closed state for closing the storage area 14, and the sensor includes a travel switch, a photosensitive sensor, a pressure sensor, and an infrared sensor for detecting whether the partition structure 11 is in a closed state.

[0047] In the second embodiment, the sub-refrigeration units are a plurality of storage boxes 12 that are independently arranged. Each storage box 12 can be the storage box 12 in the first embodiment, and the interior thereof can be partitioned or unpartitioned.

[0048] The cold storage unit 20 is a cold storage of the mobile fresh-keeping box 100. The cold storage unit 20 includes a cold storage box 201, and the cold storage box 201 is used to load a cold storage medium.

[0049] The structure and shape of the cold storage box 201 are not limited, and it is used to contain the cold storage medium and keep the cold storage medium warm. The cold storage medium is used to store a large amount of cold energy, and provides cold energy to the cold demanding unit 10 through the cold supply unit 30 .

[0050] The cold storage medium includes both single-component cold storage medium, such as water, alcohol, etc., and multi-component cold storage medium, such as salt water mixture, alcohol water mixture, salt-alcohol-water mixture. The appropriate cold storage medium can be selected according to the required cooling capacity and its temperature control range.

[0051] In the present invention, the cold storage medium has solid and liquid states. The solid state is more stable than the liquid state, including both the physical storage morphological stability and the low entropy stability in energy, but the solid state is not easy to transport, and the liquid cold storage medium is convenient to be transported to the cold-requiring unit 10 to directly provide cold energy thereto. When the solid cold storage medium absorbs heat and undergoes a phase change to become liquid, it absorbs a large amount of heat, that is, it releases a large amount of cold energy to the outside.

[0052] The material of the cold storage box 201 is not limited, but preferably a material with high strength and not prone to corrosion, such as a stainless steel box, a PP box, an ABS box, or a fiberglass box.

[0053] The cold storage box 201 includes a first storage area 202 for accommodating solid and / or liquid cold storage media, and the solid cold storage medium will melt and become liquid after a period of time. Preferably, the cold storage box 201 also includes a second storage area 203 for accommodating liquid cold storage media, and a certain amount of liquid cold storage media is stored in the second storage area 203 to ensure that cold capacity can be provided to the cooling unit 10 at any time.

[0054] In the first type of cold storage box 201 , the second accommodating area 203 is connected to the first accommodating area 202 , and liquid cold storage medium can flow between the first accommodating area 202 and the second accommodating area 203 .

[0055] In the first case, the first accommodating area 202 and the second accommodating area 203 are two areas in a storage container, and the first accommodating area 202 is configured to facilitate the accumulation of liquid cold storage medium.

[0056] In a preferred embodiment, the cold storage box 201 includes a solid-liquid separation structure 204 that divides the cold storage box 201 into a first accommodating area 202 and a second accommodating area 203. The cold storage box 201 is a water tank, or when a water tank is provided in the cold storage box 201, the solid-liquid separation structure 204 is located in the water tank.

[0057] The solid-liquid separation structure 204 is used to prevent the solid cold storage medium from entering the second accommodating area 203. Those skilled in the art can understand that the solid-liquid separation structure can also be a filter located at the connection between the cold supply unit 30 and the cold storage box 201, and the filter can be fixed on the cold storage box 201, or fixed to the end of the cold supply unit 30, for example, fixed to the end of the first transmission unit 31.

[0058] In the cold storage box 201 having a solid-liquid separation structure 204, the communication modes of the first accommodating area 202 and the second accommodating area 203 include but are not limited to the following:

[0059] 1) The solid-liquid separation structure 204 is provided with a communication port connecting the first accommodating area 202 and the second accommodating area 203 , so that the liquid cold storage medium can flow between the first accommodating area 202 and the second accommodating area 203 .

[0060] In a specific embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged in a horizontal direction, and the connecting port 205 is provided at the bottom of the solid-liquid separation structure 204. According to the communicating vessel principle, the height of the liquid cold storage medium in the first accommodating area 202 is consistent with that in the second accommodating area 203, and the liquid cold storage medium in the first accommodating area 202 can flow quickly into the second accommodating area 203.

[0061] In another specific embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged in a horizontal direction, and the connecting port 205 is provided in the middle and upper part of the solid-liquid separation structure 204. The liquid cold storage medium in the first accommodating area 202 will flow into the second accommodating area 203 only when the height reaches the connecting port 205, so that the liquid cold storage medium and the solid cold storage medium are in contact for a long time, and the heat exchange effect is good.

[0062] In another specific embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged in the height direction, and the communication port is opened at any position on the solid-liquid separation structure 204. Preferably, the first accommodating area 202 is located above the second accommodating area 203, and the liquid cold storage medium flows into the second accommodating area 203 under the action of gravity. Alternatively, the first accommodating area 202 is located below the second accommodating area 203, and in this case, the liquid cold storage medium needs to be pumped into the second accommodating area 203 through a water pipe and a water pump.

[0063] 2) On the basis of providing the above-mentioned connecting port on the solid-liquid separation structure 204 or not providing the above-mentioned connecting port on the solid-liquid separation structure 204, the first accommodating area 202 and the second accommodating area 203 can also be connected through the gap between the edge of the solid-liquid separation structure 204 and the cold storage box 201.

[0064] Taking the horizontal arrangement of the first accommodating area 202 and the second accommodating area 203 as an example, the first accommodating area 202 and the second accommodating area 203 are connected to the gap between the bottom edge or the side edge of the solid-liquid separation structure 204 and the cold storage box 201; or, the height of the solid-liquid separation structure 204 is lower than the height of the cold storage box 201, and the first accommodating area 202 and the second accommodating area 203 are connected through the top of the solid-liquid separation structure 204, that is, the liquid cold storage medium flows from the first accommodating area 202 from the top of the solid-liquid separation structure 204 to the second accommodating area 203.

[0065] Preferably, in another embodiment, the bottom of the cold storage box 201 is provided with a plurality of raised support parts 206 which are integrally or separately provided with the cold storage box, and a connecting channel 208 which connects the gaps 207 between adjacent raised support parts 206. The raised support parts 206 can strengthen the strength of the bottom of the cold storage box 201 on the one hand, and support the solid cold storage medium on the other hand. The upper part of the plurality of raised support parts 206 constitutes the first accommodating area 202, and the gaps 207 between the plurality of raised support parts 206 are connected by the channel to constitute the second accommodating area 203. When the cold storage box 201 is a water tank, or a water tank is provided in the cold storage box 201, the raised support parts 206 are located at the bottom of the water tank.

[0066] In one specific embodiment, the protruding support portion 206 is a protruding rib, the connecting channel 208 is located at the end or middle part of the protruding rib, and the gaps 207 between adjacent protruding ribs and the connecting channel 208 together constitute the second accommodating area 203. In another specific embodiment, the protruding support portion 206 is a protruding block that is independently arranged, and the gaps 207 between adjacent protruding blocks are connected to each other through the connecting channel 208 to constitute the second accommodating area 203.

[0067] Preferably, in another embodiment, the bottom of the cold storage box 201 has at least one depression and a connecting passage 208 connected to the at least one depression, the top of the depression is the first accommodating area 202, and the at least one depression and the connecting passage 208 constitute the second accommodating area 203. The cold storage box 201 is a water tank, or when a water tank is provided in the cold storage box 201, the depression is provided at the bottom of the water tank; for example, the bottom plate of the water tank is wavy.

[0068] Furthermore, the cold storage unit 20 further includes at least a cold adding port 209 for adding a solid cold storage medium, and a cold adding cover for opening or closing the cold adding port 209. The cold adding port 209 is preferably arranged at the top or side of the cold storage unit 20, so as to facilitate rapid loading of a solid cold storage medium and rapid storage of a large amount of cold energy to meet the cold energy demand of the agricultural product precooling process.

[0069] In a specific embodiment, water is used as a cold storage medium to describe the cold storage unit 20 of the present invention. It is ice cubes in solid state and water in liquid state. Before cold chain transportation, according to the required amount of cold, a sufficient amount of ice cubes with stable shape are added to the cold storage box 201 to achieve rapid cold storage; the temperature of the ice cubes rises or melts into water after absorbing heat, and the mixture of water and ice cubes is called ice-water mixture. At this time, the temperature of the water is relatively low, about 0° cold water; the cold supply unit 30 transmits the cold water to the cold demand unit 10, and the cold water rises in temperature after heat exchange with the cold demand unit 10, and then flows back to the cold storage box 201 to exchange heat with ice cubes and / or ice water.

[0070] It should be noted that if the unit 10 that needs to be cooled needs to be supplied with cold water immediately after rapid cold storage, and the ice cubes do not have time to melt into sufficient cold water, a portion of water needs to be added to the cold storage box 201 after the ice cubes are loaded, and then the portion of water is supplied to the unit 10 that needs to be cooled, and the return water with a higher temperature exchanges heat with the ice cubes, and the water in the cold storage box 201 will increase. If there is still a certain amount of time before the pre-cooling fresh-keeping box is transported to the destination and loaded with agricultural products after rapid cold storage, a portion of the ice cubes will melt into water to form an ice-water mixture during this period of time, and there is no need to add cold water at the beginning.

[0071] Furthermore, the cold storage unit 20 is further provided with a holding structure 20a for holding the solid cold storage medium. The holding structure 20a is a stable frame for clamping the solid cold storage medium to prevent the solid cold storage medium from shaking and falling during transportation.

[0072] Specifically, the retaining structure 20a is located in the first accommodating area 202, which can not only stabilize the solid cold storage medium, but also prevent the solid cold storage medium from directly colliding with the cold storage box.

[0073] Alternatively, a water tank opening upward is provided in the cold storage box 201, and the retaining structure 20a is arranged on the outside of the water tank, and part of the retaining structure 20a is higher than the water tank, thereby fixing the solid cold storage medium located above the water tank and enhancing the strength of the water tank to prevent it from breaking.

[0074] Alternatively, a water tank opening upward is provided in the cold storage box 201, and the retaining structure 20a is arranged above the water tank, which is equivalent to raising the wall of the water tank to fix the solid cold storage medium located above the water tank, and the side wall of the water tank can stabilize the solid cold storage medium in the water tank.

[0075] Alternatively, a water tank with an upward opening is provided in the cold storage box 201, the retaining structure 20a is located in the water tank, and part of the retaining structure 20a is higher than the water tank, which can stabilize the solid cold storage medium and prevent the solid cold storage medium from directly hitting the water tank.

[0076] Based on all the above embodiments, the retaining structure 20a is preferably a grid frame, which can stabilize the solid cold storage medium without hindering the flow of the liquid cold storage medium, and is light in weight, saves materials, and occupies little space.

[0077] Furthermore, the cold storage unit 20 further includes a buffer structure (not shown) located inside the box wall of the cold storage box 201 to mitigate the impact of the solid cold storage medium on the box wall. The buffer structure includes at least one of a buffer pad, a traction structure, and an elastic structure.

[0078] In the second case, the first storage area 202 and the second storage area 203 are two storage containers, which are connected by a connecting pipe. Preferably, a switch valve or a liquid pump is provided on the connecting pipe to drive the cold storage medium to circulate between the first storage area 202 and the second storage area 203. The difference from the first type of cold storage box 201 is mainly the connection method of the two storage areas, and the rest will not be repeated.

[0079] In the second type of cold storage box 201, the first storage area 202 and the second storage area 203 are independently arranged, and the two are not connected, and the cold storage medium in the first storage area 202 directly or indirectly provides cold to the cold storage medium in the second storage area 203. The difference from the first type of cold storage box 201 mainly lies in how the cold storage media in the two storage areas conduct heat conduction, and other details are not repeated.

[0080] In one embodiment, the second accommodating area 203 is embedded in the first accommodating area 202, or the first accommodating area 202 is embedded in the second accommodating area 203, or the second accommodating area 203 and the first accommodating area 202 are arranged adjacent to each other, and heat is transferred between the two through heat radiation. Preferably, the partition wall between the two accommodating areas is a plate material with good heat conduction performance such as a metal wall.

[0081] In another embodiment, the cold storage unit 20 further includes a heat transfer structure, a portion of which is located in the first accommodating area 202, and another portion of which is located in the second accommodating area 203. The heat transfer structure includes but is not limited to a heat transfer rod, a heat transfer sheet, a heat pipe, and the like.

[0082] In another embodiment, the cold storage unit 20 further includes a bypass heat pipe communicating with the first storage area 202, a bypass pump connected to the bypass heat pipe, and a portion of the bypass heat pipe is located in the second storage area 203; or, the cold storage unit 20 further includes a bypass heat pipe communicating with the second storage area 203, a bypass pump connected to the bypass heat pipe, and a portion of the bypass heat pipe is located in the first storage area 202. When the bypass pump is started, the liquid cold storage medium flows in the bypass heat pipe, and the cold of the cold storage medium in the first storage area 202 is transferred to the cold storage medium in the second storage area 203.

[0083] The second type of cold storage unit 20 has a liquid cold storage medium added thereto, which facilitates the cold supply unit 30 to provide cold to the cold demanding unit 10. The only difference from the first type of cold storage unit 20 is that the first accommodating area 202 and the second accommodating area 203 are the same accommodating area, and the rest is not repeated.

[0084] Based on the above-mentioned cold storage unit 20, the present invention also provides a rapid cold storage system, which quickly adds solid cold storage medium into the cold storage box 201, that is, completes rapid cold filling. Compared with the traditional method of changing the cold storage medium from liquid to solid through a refrigeration unit or a cold filling machine, the present case has a fast cold filling speed and a large cold filling capacity in a short time, which can meet the pre-cooling needs of agricultural products.

[0085] The cooling unit 30 is a medium for transmitting the cooling energy stored in the cooling medium to the cooling unit 10 .

[0086] The first type of cold supply unit 30 is applicable to the above two types of cold storage units 20. The cold supply unit 30 is used to transfer the liquid cold storage medium to the cold demanding unit 10 to directly provide cold thereto.

[0087] The cooling unit 30 includes a heat exchanger 32 disposed at the cooling unit 10, a first transmission unit 31 that transmits a liquid cooling medium to the heat exchanger 32, and a driving pump that drives the cooling medium to be transmitted. The cooling medium exchanges heat with the cooling unit 10 in the heat exchanger 32, has no direct contact with the cooling unit 10, and is a soft heat transfer, which does not damage the cooling unit 10.

[0088] Preferably, the cold supply unit 30 further includes a second transmission unit 33 for transmitting the cold storage medium from the heat exchanger 32 to the cold storage unit 20. The cold supply unit 30 transmits the liquid cold storage medium with a relatively low temperature to the heat exchanger 32 through the first transmission unit 31. The cold storage medium increases in temperature after heat exchange with the cold demanding unit 10 in the heat exchanger 32, and returns to the cold storage unit 20 through the second transmission unit 33; at the same time, the cold supply unit 30 continues to transmit the liquid cold storage medium with a relatively low temperature to the heat exchanger 32, forming a dynamic cycle, and continuously providing cold to the cold demanding unit 10.

[0089] The heat exchanger 32 may be a direct cooling heat exchanger, including at least one heat exchanger body 321 , wherein the heat exchanger body 321 includes heat exchange tubes, and preferably also includes heat dissipation fins to increase the heat exchange area.

[0090] The heat exchanger 32 includes at least two heat exchanger bodies 321, and at least two heat exchanger bodies 321 are arranged in the vertical direction and / or the horizontal direction. When arranged in the vertical direction, the cooling capacity is released more evenly on the entire surface; when arranged in the horizontal direction, it is convenient to provide cooling in different zones in the horizontal direction. For convenience, when describing the relationship between the heat exchange fan 322 and the heat exchanger body 321, the at least two heat exchanger bodies 321 can also be described as a whole: the heat exchanger body 321 includes at least two sub-heat exchanger bodies 321 distributed in the horizontal direction and / or the vertical direction.

[0091] The heat exchanger 32 can also be equipped with a heat exchange fan 322 on the basis of the direct cooling heat exchanger. When the cooling unit 10 requires a large amount of cooling, the heat exchange fan 322 is started to speed up the heat exchange of the heat exchanger 32; when the cooling unit 10 requires a small amount of cooling, the heat exchange fan 322 is not started.

[0092] In the present invention, the heat exchange fan 322 is divided into two types according to its function:

[0093] The first one is that the heat exchanger body 321 is located at the air outlet side or air intake side of the heat exchange fan 322, and the cooling unit 10 is located at the air outlet side of the heat exchange fan 322. The purpose of the heat exchange fan 322 is to drive the air at the cooling unit 10 to exchange heat with the heat exchanger body 321, which essentially constitutes an air-cooled heat exchanger, which is suitable for the cooling unit 10 that is not afraid of cold wind.

[0094] Second, the purpose of the heat exchange fan 322 is only to disturb the air around the heat exchanger 32 to speed up the heat exchange between the heat exchanger 32 and the heat exchanger 32, but it is not desired to blow the cold air toward the cooling unit 10. In essence, it is still a direct cooling heat exchanger.

[0095] Specifically, the heat exchanger body 321 is located in the air intake area or air outlet area of ​​the heat exchange fan 322, and the cooling unit 10 is located in the non-air outlet area of ​​the heat exchange fan 322. Wind passes through the heat exchanger 32, but does not blow toward the cooling unit 10, or a small amount of edge wind blows toward the cooling unit 10, so as to avoid the cold wind blowing directly toward the cooling unit 10 and causing damage to it.

[0096] In one embodiment, the heat exchange fan 322 is located between the heat exchanger body 321 and the cooling unit 10, and the heat exchanger body 321 is located at the air outlet side of the heat exchange fan 322. For example, the heat exchange fan 322 is below the heat exchanger body 321 and blows directly upward, and the cooling unit 10 is located below the heat exchange fan 322.

[0097] In another embodiment, the heat exchanger body 321 has a first side and a second side distributed on both sides of the heat exchanger body 321 along a first direction, the cooling unit 10 is located on the first side, and the heat exchange fan 322 is arranged on one side of the heat exchanger body 321 along a second direction perpendicular to the first direction. For example, the cooling unit 10 is located below the heat exchanger body 321, and the heat exchange fan 322 is located on one side of the heat exchanger body 321 in the horizontal direction, and the heat exchange fan 322 blows horizontally toward the heat exchanger body 321, so as to prevent the cold wind passing through the heat exchanger body 321 from blowing directly toward the bottom of the heat exchanger body 321 and causing damage to the cooling unit 10.

[0098] Preferably, if Figure 13~Figure 15 As shown, the outlet center line of the heat exchange fan 322 is tilted toward the second side. For example, the outlet air of the heat exchange fan 322 is blown obliquely upward toward the heat exchanger body 321 to prevent the cold air passing through the heat exchanger body 321 from blowing directly toward the bottom of the heat exchanger body 321 and causing damage to the cooling unit 10.

[0099] Preferably, the inclination angle a of the heat exchange fan 322 is greater than 0° and less than 90°; preferably between 10° and 80°, more preferably between 30° and 60°, more preferably between 40° and 50°, and the wind passes through most areas of the heat exchanger body 321 but does not blow towards the cooling unit 10.

[0100] Furthermore, if Fig.15 As shown, the heat exchanger 32 includes at least two heat exchange fans 322, and the at least two heat exchange fans 322 are respectively arranged on two sides of the heat exchanger body 321 that are arranged opposite to each other along the second direction. Blowing air from two opposite sides to the heat exchanger body 321 at the same time improves the heat exchange efficiency, and at the same time, the winds in the two directions offset each other to a certain extent, preventing cold air from blowing to the first side of the heat exchanger body 321.

[0101] Preferably, the air outlet center line of the heat exchange fan 322 is inclined toward the second side, and the intersection of the air outlet center lines of the heat exchange fans 322 disposed on two opposite sides of the heat exchanger body 321 is located on the heat exchanger body 321 .

[0102] When the heat exchanger body 321 is located on the air outlet side of the heat exchange fan 322, when the heat exchange fans 322 on both sides are symmetrically arranged, the above-mentioned intersection point can be located inside the heat exchanger body 321, and most areas of the heat exchanger body 321 can be blown by wind; the above-mentioned intersection point can also be located beyond the heat exchanger body 321 and located on the second side of the heat exchanger body 321, and some areas on the heat exchanger body 321 cannot be blown by wind.

[0103] The inventors further discovered that: taking the line connecting the heat exchange fans 322 disposed on both sides of the heat exchanger body 321 as the baseline, the larger the inclination angle a of the heat exchange fans 322, the larger the distance between the intersection and the baseline; and the larger the inclination angle a of the heat exchange fans 322, the less wind blown toward the cooling unit 10, and the closer to direct cooling. Fig.14 As shown, the air outlet center axis of the heat exchanger fan 322 is offset from the center of the heat exchanger body 321 along the first side to the second side to the first side, and the offset distance is within 1 times the width of the heat exchanger body 321 along the first direction. Preferably, when the heat exchanger body 321 is located at the air outlet side of the heat exchanger fan 322, the heat exchanger fan 322 is flush with the part of the center axis of the heat exchanger body 321 along the first direction facing the first side. Taking the first side as the bottom of the heat exchanger body 321 and the second side as the top of the heat exchanger body 321 as an example, the heat exchanger fan 322 is located on one side of the heat exchanger body 321 in the horizontal direction and is flush with its lower half.

[0104] Correspondingly, when the heat exchanger body 321 is located at the air suction side of the heat exchange fan 322, the heat exchange fan 322 is flush with the portion of the heat exchanger body 321 along the central axis of the first direction toward the second side, so that as much wind as possible passes through the heat exchanger body 321.

[0105] It should be noted that the "cooling unit 10" described above is the part that actually receives the cold energy. For example, the cooling unit 10 includes a storage box 12 and a door body 13. The storage box 12 is provided with a heat exchange area and a storage area 14. The heat exchanger 32 is arranged in the heat exchange area. The storage area 14 and the goods located therein are the "cooling unit" that actually receives the cold energy.

[0106] Preferably, the heat exchange area is located above the storage area 14, the cold is supplied from top to bottom, and the temperature of the entire storage area 14 is relatively uniform. Alternatively, the heat exchange area is located on one side of the storage area 14 in the horizontal direction, which does not affect loading and unloading. Alternatively, the heat exchanger 32 is located on the side of the storage box 12 away from the door body 13 to avoid cold leakage. Alternatively, the heat exchanger 32 is located at one of the door bodies 13 for easy maintenance.

[0107] Furthermore, when the heat exchanger 32 includes at least one heat exchange fan 322, the heat exchange fan 322 is arranged on a side of the heat exchanger body 321 close to the door body 13, and cold air is blown into the storage box 12 to avoid leakage of cold air.

[0108] The above positional relationship between the heat exchange fan 322 and the heat exchanger body 321, or the positional relationship between the heat exchange fan 322, the heat exchanger body 321 and the cooling unit 10, is also applicable to replacing the above-mentioned heat exchanger body 321 with a cold source such as a cold storage component or an evaporator of a refrigeration unit.

[0109] The heat exchanger 32 is preferably disposed on the top of the storage box 12, and the heat exchanger 32 is fixed to the top wall, side wall or bottom wall of the storage box 12 by a fixing structure; the fixing methods include but are not limited to the following:

[0110] The heat exchanger is directly fixed to the top wall of the storage box by a first fixing structure. The first fixing structure is a fixing nail, and the fixing nail passes through the heat exchanger from the bottom upward and is fixed to the top wall of the storage box 12. Alternatively, the first fixing structure is a hanging structure fixed to the top wall of the storage box, and the heat exchanger is hung on the hanging structure.

[0111] The heat exchanger 32 is indirectly fixed in the storage box through a second fixing structure 324 .

[0112] In one embodiment, the second fixing structure 324 includes a keel frame and a fixing frame for fixing the keel frame to the storage box. The keel frame includes crisscross brackets with sufficient load-bearing capacity to fix the heat exchanger to the keel frame. The fixing method can be fixed to the keel frame by fixing nails, or the heat exchanger can be hung on the hanging structure of the keel frame.

[0113] In another embodiment, if Fig.16 As shown, the second fixed structure 324 includes at least one sliding frame 3241 and a fixed frame 3242 for fixing the sliding frame 3241. The heat exchanger is supported on the sliding frame 3241. For example, the heat exchanger is pushed from one end of the sliding frame 3241 to the other end to a suitable position, which makes installation easy and convenient for installing multiple heat exchangers on the same set of sliding frames 3241.

[0114] In the above two embodiments, the mobile fresh-keeping box includes at least two cooling units, or the cooling unit includes at least two heat exchangers, that is, when multiple heat exchangers are fixed on the top of the storage box, at least two heat exchangers are fixed on the same keel frame or sliding frame 3241, or different heat exchangers are fixed on different keels or sliding frames 3241.

[0115] In the above two embodiments, the fixing frame 3242 is at least one hanger for fixing the keel frame or the sliding frame to the top wall of the storage box, or at least one side bracket for fixing the keel frame or the sliding frame to the side wall of the storage box, or at least two supporting frames for fixing the keel frame or the sliding frame to the bottom wall of the storage box.

[0116] Preferably, the support frame is arranged close to the side wall of the storage box. In another preferred embodiment, the second fixing structure 324 includes at least two sliding frames arranged at intervals, each sliding frame is fixed by at least two fixing frames. In the extending direction of the sliding frame, the fixing frames of the two sliding frames are aligned or staggered.

[0117] The first transmission unit 31 can also be called a liquid supply pipe, and the second transmission unit 33 can be called a liquid return pipe. The liquid cold storage medium circulates between the cold storage box 201 and the heat exchanger 32 under the action of the driving pump. The connection relationship between the first transmission unit 31, the second transmission unit 33 and the cold storage unit 20 will be described in detail below.

[0118] The first type of cold storage unit 20 connected to the first storage area 202 and the second storage area 203 is connected in the following manner: In a preferred embodiment, the first transmission unit 31 is connected to the second storage area 203 to ensure that there is enough liquid cold storage medium flowing to prevent the driving pump from idling and entering the air. The second transmission unit 33 is connected to the first storage area 202, and the returned high-temperature cold storage medium performs heat exchange with the solid and / or liquid cold storage medium in the first storage area 202.

[0119] Preferably, the reflux port of the second transmission unit 33 is located above the first accommodating area 202, and the refluxed cold storage medium enters the first accommodating area 202 from the top downward to fully exchange heat with the solid and / or liquid cold storage medium. Of course, the reflux port of the second transmission unit 33 can also be located in the middle and lower part of the first accommodating area 202.

[0120] Furthermore, the second transmission unit 33 includes a reflux pipe 331 located above the first accommodating area 202, and a plurality of reflux ports are arranged on the reflux pipe 331. Preferably, along the reflux pipe 331, in the direction away from the heat exchanger 32, the diameter of the reflux ports increases, and / or the setting density of the reflux ports increases. The increase in setting density includes an increase in the number of the reflux ports, a decrease in the spacing between the reflux ports, etc. With such a design, the pressure change of the liquid cold storage medium in the reflux pipe 331 is exactly opposite, so that the refluxed cold storage medium can enter the cold storage box 201 evenly.

[0121] Of course, the second transmission unit 33 may also be connected to the second accommodating area 203. Preferably, the connection between the second transmission unit 33 and the second accommodating area 203 is higher than the connection between the first transmission unit 31 and the second accommodating area 203.

[0122] Furthermore, the communication mode between the second transmission unit 33 and the second accommodating area 203 is the same as the communication mode between the second transmission unit 33 and the first accommodating area 202 , which will not be described in detail herein.

[0123] The connection method of the second type of cold storage unit 20 that is not connected to the first accommodating area 202 and the second accommodating area 203 is: the first transmission unit 31 and the second transmission unit 33 are both connected to the first accommodating area 202, and the connection method is the same as the connection method in the above-mentioned first type of embodiment, which will not be repeated here.

[0124] Based on the description of the cooling unit, one or more heat exchangers can be connected in series between each group of the first transmission unit 31 and the second transmission unit 33. The multiple heat exchangers 32 connected in series can provide cooling for one storage area or for multiple different storage areas. In a preferred embodiment, each storage area 14 is cooled by a group of the first transmission unit and the second transmission unit and one or more heat exchangers connected thereto are independently controlled for cooling.

[0125] The second type of cooling unit 30 includes a circulation pipeline, a cooling medium flowing in the circulation pipeline, and a driving element driving the cooling medium to flow in the circulation pipeline. When the cooling medium is in liquid state, the driving element is a water pump; when the cooling medium is in gaseous state, the driving element is a fan.

[0126] A portion of the circulation pipeline is heat-conducted with the cold storage unit 20 , for example, a portion of the circulation pipeline is located in the cold storage unit 20 and directly contacts the cold storage medium. Another portion of the circulation pipeline is heat-conducted with the cold demanding unit 10 .

[0127] Furthermore, the cooling unit 30 also includes a heat exchanger 32 connected to the circulation pipeline. The heat exchanger 32 and the heat exchange method with the cooling unit 10 refer to the first type of cooling unit 30, which will not be described in detail.

[0128] Preferably, the pre-cooling fresh-keeping box 100 includes at least any two of the above-mentioned cooling units 30, and can provide cooling to the cooling unit 10 by at least two cooling supply methods. On the one hand, it can adapt to different cooling units 10; on the other hand, when the cooling unit 10 requires a large amount of cooling, at least two cooling units 30 can be turned on, and when the cooling unit 10 does not require a large amount of cooling, one of them can be selected to provide cooling.

[0129] The above heat conduction setting and heat conduction connection refer to: the two can directly or indirectly exchange heat. In addition, any of the above cold storage units 20 can be used in conjunction with any of the above cold supply units 30 to form a cold storage and cold supply system. Through this cold storage and cold supply system, a friendly low-temperature environment is provided for fruits and other agricultural products, which is equivalent to storing fruits in a winter environment.

[0130] The present invention realizes rapid cold storage by adding a solid cold storage medium into the cold storage box 201. After the goods are added to the storage box 12, the cold supply unit 30 quickly supplies cold energy to the storage box 12 to realize pre-cooling; when the temperature is reduced to the refrigeration or freezing temperature, the pre-cooling stage ends, and the cold supply unit 30 provides cold energy in the second cooling mode, and enters the refrigeration or freezing stage. Among them, the cold supply in the pre-cooling stage is greater than the cold supply in the refrigeration or freezing stage.

[0131] As can be seen from the above, the mobile fresh-keeping box 100 of the present invention can be transported by car, and can reach the agricultural product base as long as there is a road, and is very close to the product picking site. And the large amount of cold energy stored in the cold storage unit 20 is used to achieve pre-cooling. The pre-cooling process is not limited by whether the product base has power supply or a refrigerant, and pre-cooling at the production site can be achieved. The goods are loaded directly from the source and transported directly to the destination, avoiding the intermediate turnover process of traditional cold chain vehicles, greatly improving transportation efficiency.

[0132] After the agricultural products are picked, they can be placed in the storage box 12 as soon as possible. After the goods are filled and the door is closed, the refrigeration unit 30 is turned on to enter the pre-cooling process. That is, the agricultural products do not need to be pulled to the cold storage for pre-cooling. The pre-cooling of the boxes can be achieved at the agricultural product base, which can lock in freshness in time and ensure the taste and quality.

[0133] When the temperature of agricultural products is lowered to the refrigeration or freezing temperature, they can directly enter the refrigeration or freezing stage by adjusting the cooling mode. That is, they can enter the refrigeration or freezing stage after pre-cooling without the need for transportation. Compared with traditional cold chain transportation, there is no need for multiple transportation, which reduces the damage caused by collision and squeezing of agricultural products.

[0134] Moreover, the goods can enter the transportation process after they are fully loaded and the door is closed, and the pre-cooling, preservation and other processes are carried out during transportation, truly realizing the functions of load-and-go, on-board pre-cooling, and pre-cooling during transportation. Therefore, the product is only handled once from packing to unloading at the destination, and the damage rate caused by collision to the goods is greatly reduced; and the goods are pre-cooled and refrigerated / frozen in the pre-cooling and preservation box, and are in the refrigerated or frozen environment provided by the refrigeration unit 30 throughout the process, ensuring that the cold chain is uninterrupted throughout the process; this is something that cannot be overcome or achieved in current cold transportation.

[0135] The inventors further discovered that the cold storage unit 20 is used to load a large amount of solid cold storage medium to meet the needs of pre-cooling of goods, but this part of the cold storage medium will increase the transportation cost. In addition, during the above-mentioned cooling or cooling process, the solid cold storage medium melts, and the amount of liquid cold storage medium increases, which is easy to shake and escape during transportation. To this end, the present invention further arranges a discharge unit 40 to discharge the liquid cold storage medium to the outside. On the one hand, it can reduce the amount of solid cold storage medium added at one time, discharge it after it melts, and re-add the solid cold storage medium, that is, add the solid cold storage medium in batches, reduce the volume or weight of the cold storage unit 20, and increase the cargo capacity; on the other hand, even if the solid cold storage medium is added at one time, the weight can be reduced by discharging the liquid cold storage medium after the cold is released, thereby reducing the transportation cost.

[0136] The discharge unit 40 is an optional unit added as needed, and can be closed or removed.

[0137] In one embodiment, the discharge unit 40 includes a first discharge port 401 communicating with the cold storage unit 20 , or the discharge unit 40 includes a first discharge port 401 communicating with the cold storage unit 20 and a first discharge pipe 402 communicating with the first discharge port 401 .

[0138] Specifically, the first discharge port 401 is provided on the cold storage box 201. When the liquid level of the liquid cold storage medium reaches the height of the first discharge port 401, it is automatically discharged outward. Preferably, the height difference between the first discharge port 401 and the bottom of the cold storage unit 20 is ≥20 cm, preferably equal to or greater than 40 cm, preferably ≥50 cm, preferably ≥60 cm, preferably ≥50 cm, preferably ≥80 cm, preferably ≥90 cm, preferably ≥100 cm, to ensure that there is sufficient liquid cold storage medium in the cold storage unit 20 so as not to affect the circulating cold supply.

[0139] Based on the above-mentioned cold storage unit 20 , the first discharge port 401 is communicated with the first accommodating area 202 , or the first discharge port 401 is communicated with the second accommodating area 203 .

[0140] Alternatively, the discharge unit 40 further includes a first discharge port 401' opened on the first transmission unit 31; or, the discharge unit further includes a first discharge pipe 402' connected to the first transmission unit 31. The first discharge port 401' and the first discharge pipe 402' can also discharge sewage to the outside, or discharge the cold storage medium that has released cold energy to the outside after the transportation is completed.

[0141] Furthermore, the discharge unit 40 further includes a first discharge valve for opening or closing the first discharge port 401 / 401' or the first discharge pipe 402 / 402'. Through the first discharge valve, the discharge can be controlled in terms of time, space, temperature, etc. For example, the discharge can be performed in at least one of the precooling, refrigeration or freezing stages, preferably after the precooling is completed and before the goods are returned, so as to reduce the power consumption of the vehicle. Alternatively, the discharge can be performed in the wilderness, avoiding the discharge in toll stations, urban areas and other areas.

[0142] In another embodiment, the discharge unit also includes a second discharge port 403 opened on the second transmission unit 33, and a second discharge valve for opening or closing the second discharge port 403; or, the discharge unit also includes a second discharge pipe 404 connected to the second transmission unit 33, and a second discharge valve for opening or closing the second discharge pipe 404.

[0143] The present invention preferably discharges the cold storage medium outward from the second transmission unit 33, which can avoid the return cold storage medium from being discharged after heat exchange with the solid cold storage medium, thereby avoiding cold loss.

[0144] Furthermore, the discharge unit also includes a sensor for detecting the amount of liquid cold storage medium in the storage box 12. When the amount of liquid cold storage medium in the cold storage box 201 reaches the highest line, the second discharge valve is opened to discharge the cold storage medium outward with all efforts. When the amount of liquid cold storage medium in the cold storage box 201 reaches the middle line, the second discharge valve is half-opened, part of the refluxed cold storage medium is discharged outward, and part of it flows back into the cold storage unit 20, so as to avoid a sharp decrease in the liquid cold storage medium in the cold storage box 201. When the amount of liquid cold storage medium in the cold storage box 201 reaches the lowest line, the second discharge valve is closed, and all the cold storage medium flows back into the cold storage unit 20.

[0145] In a preferred embodiment, the above-mentioned two discharge units are included, and the discharge unit also includes a first sensor for detecting the temperature of the liquid cold storage medium in the cold storage unit 20 or the cold storage medium in the first transmission unit 31, and a second sensor for detecting the temperature of the cold storage medium in the second transmission unit 33 or the temperature of the cold-requiring unit. If the temperature of the cold storage medium measured by the first sensor is low, the second discharge valve is opened; if the temperature measured by the first sensor is low, the first discharge valve is opened to preferentially discharge the cold storage medium with a high temperature to avoid waste of cold.

[0146] In addition, for the convenience of assembly, the present invention modularizes the cold storage unit 20 and refers to it as a cold storage module. The cold storage module includes any of the cold storage units 20 described above, and the cold storage module also includes at least one set of cooling interface ends connected to the cooling supply unit 30 for the liquid cold storage medium to flow out and return. At this time, the cooling supply unit includes a cooling interface end connected to the cooling interface end to transfer the cold of the cold storage medium to the cooling unit 10.

[0147] The cooling interface end for the liquid cold storage medium to flow out is connected to the first transmission unit 31, and the connection mode between the cooling interface end and the cold storage tank 201 is the same as the connection mode between the first transmission unit 31 and the cold storage tank 201. The cooling interface end for the liquid cold storage medium to flow back is connected to the second transmission unit 33, and the connection mode between the cooling interface end and the cold storage tank 201 is the same as the connection mode between the second transmission unit 33 and the cold storage tank 201.

[0148] According to the overall configuration, the cold storage module may further include at least a portion of the cold supply unit 30, for example, the return pipe 331 of the cold supply unit 30 and the return port disposed thereon are used as a portion of the cold storage module.

[0149] The cold storage module may further include any of the above-mentioned discharge units 40 .

[0150] The cold storage module can be combined with at least one cold demand unit 10 and at least one cold supply unit 30 to form the mobile fresh-keeping box.

[0151] The cooling units 30 correspond to the cooling demand units 10 one by one, and each cooling unit 30 provides cooling to one or more cooling demand units 10 corresponding thereto.

[0152] The cold storage unit 10 includes a storage box 12, and the storage box 12 has one or more storage areas 14. In terms of spatial arrangement, all the storage areas 14 are located on the same side of the cold storage unit 20; or, the cold storage unit 20 is located in the middle of the at least one storage area 14.

[0153] For example, a storage box 12 has multiple storage areas 14, the cold storage unit 20 is located on one side of the storage box 12, and all the storage areas 14 are located on the same side, or the cold storage unit 20 is arranged in the middle of the storage box 12 to provide cold air to the storage areas 14 on both sides. Or for example, multiple storage boxes 12 are arranged around the cold storage unit 20.

[0154] Furthermore, the cooling port 209 is provided on the wall of the cold storage unit 20 located in part of the storage box 12, or the cooling port 209 is provided on the wall adjacent to or shared by the cold storage unit 20 and part of the storage box 12. In this case, the cooling port 209 is open to the storage box 12, which can avoid unnecessary leakage of cold, and the cold storage medium needs to be added to the cold storage unit 20 through the storage box 12. Alternatively, the cooling port 209 is provided on the wall of the cold storage unit 20 exposed to the outside of the mobile fresh-keeping box 100, so that the cold storage medium can be added while loading and unloading goods into the storage box 12, and it is also convenient to replenish the cold storage medium midway.

[0155] When the precooling and fresh-keeping box of the present invention is used to transport agricultural products such as fruits and vegetables, the air in the storage box 12 needs to be replaced during transportation due to the respiration of the fruits and vegetables. In the prior art, an air inlet window is usually provided at the front of the storage box 12. After about ten hours of transportation, the air inlet window is opened to allow air to quickly enter the storage box 12 during transportation. On the one hand, after about ten hours of transportation, the gas environment in the storage box 12 is poor; on the other hand, the high-temperature gas passing through the storage box 12 will increase the temperature in the storage box 12, breaking the cold chain transportation.

[0156] To solve one of the above problems, the pre-cooling and fresh-keeping box also includes a ventilation component, which includes a first open port on the front side and a second open port on the rear side of the storage box 12 of the pre-cooling and fresh-keeping box. During transportation, fresh air continuously enters the storage box 12 from the first open port and is discharged from the second open port, so that agricultural products such as fruits and vegetables are always in a fresh gas environment, with a good preservation effect.

[0157] We control the amount of air entering the storage box 12 by controlling the area of ​​the first opening, so that the gas entering the box is discharged naturally. The first opening is set to: at a moving speed of 60 to 90 km / h, the air intake per hour is between 0.2 and 2 times the volume of the mobile fresh-keeping box, or the air intake per hour can make the air in the box replace between 0.3 and 5 rounds. For example, when the area of ​​the first opening is equivalent to a circle of the same area, the diameter is 1 to 3 centimeters. It can be understood by those skilled in the art that the more cargo is loaded, the smaller the space is, and the first opening of the same area has more air replacement times.

[0158] Preferably, the area of ​​the first opening is smaller than the area of ​​the second opening, so that air can enter the box in a controllable manner and then be discharged to the outside naturally.

[0159] Further, in the embodiment where the storage box 12 is divided into a plurality of storage areas 14 by a plurality of partition structures 11, ventilation holes are provided on the partition structures 11. Preferably, the ventilation holes on the partition structures 11 close to the first opening are smaller than the ventilation holes on the partition structures 11 close to the second opening.

[0160] Preferably, a shielding part is further included to match the vent hole, the area of ​​the shielding part is larger than the area of ​​the vent hole, and the upper part of the shielding part is a fixed end, and the rest is a free end, so that when loading, the shielding part can shield the vent hole under the action of gravity, reducing the risk of cold energy leaking from the vent hole. During transportation, the shielding part is blown up by the wind to facilitate air circulation.

[0161] Furthermore, the high-temperature air is cooled before entering the storage area 14 of the storage box 12, thereby avoiding temperature fluctuations in the box.

[0162] In one embodiment, the cold storage unit 20 is disposed at the front side of the storage box 12, and a communication port for air circulation is provided between the storage box 12 and the cold storage unit 20, and the first open port is connected to the cold storage unit 20. After entering from the first open port, the air first passes through the cold storage box 201, exchanges heat with the cold storage medium, and then enters the storage box 12 behind after the temperature is lowered, thereby avoiding large temperature fluctuations in the storage box 12.

[0163] In another embodiment, the cold storage unit 20 is arranged on the front side outside the storage box 12, and the cold storage unit 20 is provided with an air inlet hole for air to enter and an air outlet hole for air to flow out, and the air outlet hole is connected to the first open port. The air first enters the cold storage unit 20, and then enters the storage box 12 through the first open port after the temperature is reduced.

[0164] In another embodiment, the incoming air exchanges heat with a portion of the cooling assembly and then enters the storage box 12 at the rear after the temperature is lowered, thereby avoiding large temperature fluctuations in the storage box 12 .

[0165] Specifically, the air entering from the first open port is heat exchanged with the first transmission unit 31, and / or the air entering from the first open port is heat exchanged with the second transmission unit 33; and / or the air enters from the first open port and enters the storage area 14 of the storage box 12 after heat exchange with at least part of the heat exchanger 32.

[0166] Preferably, the ventilation component includes a fresh air heat exchanger connected to the first transmission unit 31 or the second transmission unit 33, and the air entering from the first open port exchanges heat with the fresh air heat exchanger.

[0167] In another embodiment, the air entering from the first opening enters the storage box 12 after heat exchange with the discharge unit 40 .

[0168] Specifically, the air entering from the first open port exchanges heat with at least a portion of the first discharge pipe 402 ; and / or the air entering from the first open port exchanges heat with at least a portion of the second discharge pipe 404 .

[0169] Alternatively, the ventilation component includes a fresh air heat exchanger connected to the first discharge pipe 402 or the second discharge pipe 404, and the air entering from the first open port exchanges heat with the fresh air heat exchanger.

[0170] The fresh air heat exchanger at least includes a heat exchange tube and a heat exchange fin.

[0171] The humidifying unit 50 is used to provide suitable humidity for the agricultural products. It is an optional unit and can be removed or turned off.

[0172] The humidifying unit 50 is preferably a non-heating humidifier, or isothermal humidifier, such as an ultrasonic humidifier, a high-pressure pump jet humidifier, etc. Of course, other humidifiers can also be used.

[0173] The humidifying unit includes a humidifier 501 and a humidifying pipe 503 connected to the humidifier 501 to discharge water vapor or water mist to the outside, and the storage box 12 is humidified through the humidifying pipe 503 .

[0174] Specifically, the humidification pipe extends into the storage box 12, and at least one nozzle 504 is provided in each storage area 143 to humidify the corresponding storage area 143. Preferably, the nozzle is an electrically controlled nozzle, which can be individually controlled to humidify each storage area 143. Of course, multiple humidification pipes connected to the humidifier can also be provided, each humidification pipe humidifies a storage area, and the humidity control is more precise.

[0175] Furthermore, a water supply pipe 502 connected to the water tank of the humidifier is used to add water thereto. Preferably, the cold storage medium is water, and low-temperature water is provided thereto through the cold storage unit 20 or the cold supply unit 30 to prevent the humidification process from causing the temperature of the storage area 14 to rise.

[0176] In one embodiment, the other end of the water supply pipe 502 is connected to the cold storage unit 20 . Specifically, the water supply pipe 502 is connected to the first accommodating area 202 or the second accommodating area 203 .

[0177] In another embodiment, the water supply pipe 502 is connected to the circulation pipeline of the cooling unit 30 through a tee to provide low-temperature water to the humidifier. For example, the other end of the water supply pipe 502 is connected to the first transmission unit 31 or the second transmission unit 33.

[0178] In another embodiment, the other end of the water supply pipe 502 is connected to the discharge unit 40. Specifically, the other end of the water supply pipe 502 is connected to the first discharge port 401 or the first discharge pipe 402; or, the other end of the water supply pipe 502 is connected to the second discharge port 403 or the second discharge pipe 404.

[0179] Alternatively, the water tank of the humidifier 501 is arranged to exchange heat with the cold storage unit to obtain cold from the cold storage unit. Specifically, the water tank of the humidifier 501 can be embedded in the cold storage unit 20; or, the water tank of the humidifier 501 is arranged adjacent to the cold storage unit 20; or, the humidifier unit 50 also includes a cold transfer pipe, a cold transfer medium flowing in the cold transfer pipe, and a driving element driving the cold transfer medium to flow in the cold transfer pipe, a part of the cold transfer pipe is arranged to conduct heat with the cold storage unit 20, for example, a part of the cold transfer pipe is located in the cold storage unit 20, preferably directly in contact with the cold storage medium; another part of the cold transfer pipe is located in the water tank of the humidifier 501 or is wrapped around the water tank of the humidifier 501.

[0180] Alternatively, the humidifying pipe 503 is disposed adjacent to the first transmission unit 31 or the heat exchanger 32 or the second transmission unit 33, and the sprayed water mist or wet air has a low temperature.

[0181] In addition, the humidifying unit 50 also includes an overflow pipe 505 connected to the water tank of the humidifier 501, and the other end of the overflow pipe 505 is connected to the cold storage unit 20, or the other end of the overflow pipe 505 leads to the outside of the mobile fresh-keeping box 100. When the water level in the water tank reaches a certain height, the water is discharged into the cold storage box. With this arrangement, there is no need for electronically controlled water addition, which saves electricity and has high reliability. Of course, an electric valve can also be set on the water addition pipe 502 to control whether to add water according to the water level of the humidifier water tank tested by a water level meter.

[0182] Furthermore, the humidifying unit 50 also includes a humidity sensor located in the storage box 12. The humidifier and the humidity sensor are both communicatively connected to the electronic control unit. The electronic control unit controls the working state of the humidifying unit through the humidity obtained by the humidity sensor.

[0183] The present invention also provides a cold chain transport vehicle, comprising a vehicle and any one of the above-mentioned mobile fresh-keeping boxes located on the vehicle. The vehicle comprises a car, a ship, an airplane, and the like.

[0184] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A mobile fresh-keeping box, It is characterized in that include: The cooling unit includes a storage box and at least one door for opening or closing the storage box, wherein a heat exchange area and a storage area are provided in the storage box; A cold storage unit for accommodating solid and / or liquid cold storage media; The cooling unit transmits the liquid cooling medium to the cooling unit, and transmits the cooling medium after heat exchange with the cooling unit to the cooling unit; the cooling unit includes a heat exchanger arranged in the heat exchange area, a first transmission unit transmitting the liquid cooling medium from the cooling unit to the heat exchanger, a second transmission unit transmitting the cooling medium from the heat exchanger to the cooling unit, and a driving pump driving the cooling medium transmission, the heat exchanger includes a heat exchanger body and at least two heat exchange fans, the heat exchanger body has a first transmission unit and a second transmission unit disposed on both sides of the heat exchanger body along a first direction. one side and a second side, the storage area is located on the first side, the heat exchanger body is located in the air intake area or the air outlet area of ​​the heat exchanger fan, and the storage area is located in the non-air outlet area of ​​the heat exchanger fan; the heat exchanger fan is arranged on one side of the heat exchanger body along a second direction perpendicular to the first direction, and at least two heat exchanger fans are respectively arranged on two sides of the heat exchanger body relatively arranged along the second direction; the air outlet centerline of the heat exchanger fan is inclined to the second side, and the intersection of the air outlet centerlines of the heat exchanger fans arranged on the two sides of the heat exchanger body relatively arranged is located on the heat exchanger body.

2. The mobile fresh-keeping box according to claim 1, Features: The heat exchanger body includes heat exchange tubes, or the heat exchanger body includes heat exchange tubes and heat dissipation fins.

3. The mobile fresh-keeping box according to claim 1, Features: The heat exchange area is located above the storage area, and the heat exchanger is located on the top of the storage box.

4. The mobile fresh-keeping box according to claim 1, Features: The heat exchanger is located at a side of the storage box away from the door body, or the heat exchange area is located at a side of the storage area in a horizontal direction.

5. The mobile fresh-keeping box according to claim 1, Features: The heat exchanger is located at one of the door bodies.

6. The mobile fresh-keeping box according to claim 1, Features: The cold storage unit also includes a cold storage box, which includes a first storage area for accommodating solid and / or liquid cold storage media and a second storage area for accommodating liquid cold storage media. The first transmission unit is connected to the second storage area, and the second transmission unit is connected to the first storage area or the second storage area.

7. The mobile fresh-keeping box according to claim 1, Features: The cold storage unit also includes a cold storage box, which includes a first accommodating area, and the first accommodating area is used to accommodate solid and liquid cold storage media, or the first accommodating area is used to accommodate liquid cold storage media; the first transmission unit and the second transmission unit are both connected to the first accommodating area.

8. The mobile fresh-keeping box according to claim 6 or 7, Features: The second transmission unit includes a reflux pipe located above the first accommodating area, and the reflux pipe is provided with a plurality of reflux ports.

9. The mobile fresh-keeping box according to claim 8, Features: Along the return pipe in a direction from the heat exchanger to away from the heat exchanger, the diameter of the return port increases, and / or the arrangement density of the return port increases.

10. A cold chain transport vehicle, It is characterized in that The invention comprises a vehicle and a mobile fresh-keeping box as claimed in any one of claims 1 to 9 located on the vehicle.

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