Mobile fresh-keeping boxes and cold chain delivery vehicles

Abstract

The present invention provides a mobile fresh-keeping box and a cold chain transport vehicle equipped therewith. The mobile fresh-keeping box includes a cold-demanding unit; a cold storage unit for accommodating a solid and / or liquid cold storage medium; a cold supply unit for transferring the cold of the cold storage medium to the cold-demanding unit; and a discharge unit for discharging the liquid cold storage medium. The present invention stores a large amount of cold by accommodating a large amount of solid and / or liquid cold storage medium in the cold storage unit, thereby meeting the needs of pre-cooling and / or preserving agricultural products. Furthermore, the discharge unit discharges the liquid cold storage medium, allowing excess liquid cold storage medium to be discharged during transportation, thereby reducing weight and transport costs.

Description

Technical Field

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

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

[0003] Different stages of cold chain transportation for agricultural products require varying amounts of cooling capacity, especially the pre-cooling stage, which requires a significant amount of cooling. However, existing cold chain transportation systems rely on refrigeration units for cooling. However, due to the power constraints of the generator and refrigeration units, the cooling capacity of the refrigeration units is limited, and can only meet the cold storage needs, but not the pre-cooling needs.

[0004] In view of this, it is necessary to provide an improved mobile fresh-keeping box and cold chain transportation vehicle. Summary of the Invention

[0005] The object of the present invention is to provide a mobile fresh-keeping box and a cold chain transport vehicle containing the same.

[0006] In order to solve one of the above technical problems, the present invention adopts the following technical solution:

[0007] A mobile fresh-keeping box includes a cooling unit; a cooling storage unit for accommodating solid and / or liquid cooling medium; a cooling supply unit for transferring the cooling capacity of the cooling medium to the cooling unit; and a discharge unit for discharging the liquid cooling medium.

[0008] Furthermore, the discharge unit includes a first discharge port opened on the cold storage unit, or in other words, the discharge unit includes the first discharge port opened on the cold storage unit and a first discharge pipe connected to the first discharge port.

[0009] Furthermore, the cold storage unit further includes a cold storage box, which includes a first accommodating area for accommodating solid and liquid or solid cold storage media, and the first discharge port is communicated with the first accommodating area.

[0010] Furthermore, the cooling unit includes a heat exchanger arranged at the cooling unit requiring cooling, a first transmission unit for transmitting liquid cooling medium from the cooling unit to the heat exchanger, a second transmission unit for transmitting cooling medium from the heat exchanger to the cooling unit, and a driving pump for driving the transmission of cooling medium; the discharge unit also includes a first discharge port opened on the first transmission unit; or the discharge unit includes a first discharge pipe connected to the first transmission unit.

[0011] Further, the discharge unit further includes a first discharge valve for opening or closing the first discharge port, or the discharge unit further includes a first discharge valve for opening or closing the first discharge pipe.

[0012] Furthermore, the cooling unit includes a heat exchanger arranged in the cooling unit requiring cooling, a first transmission unit that transmits liquid cooling medium from the cooling unit to the heat exchanger, a second transmission unit that transmits cooling medium from the heat exchanger to the cooling unit, and a driving pump that drives the transmission of cooling medium; the discharge unit also includes a second discharge port opened on the second transmission unit and a second discharge valve that opens or closes the second discharge port; or, the discharge unit also includes a second discharge pipe connected to the second transmission unit and a second discharge valve that opens or closes the second discharge pipe.

[0013] Furthermore, the discharge unit also includes a sensor for detecting the amount of the liquid cold storage medium in the storage unit.

[0014] Furthermore, the discharge unit also includes a first discharge port opened on the cold storage unit and a first discharge valve for opening or closing the first discharge port; or the discharge unit also includes a first discharge port opened on the cold storage unit, a first discharge pipe connected to the first discharge port, and a first discharge valve for opening or closing the first discharge pipe; the discharge unit also includes a first sensor for detecting the temperature of the liquid cold storage medium in the cold storage unit or the cold storage medium in the first transmission unit, and a second sensor for detecting the temperature of the cold storage medium in the second transmission unit or the cold-requiring unit.

[0015] Beneficial effects of the present invention: The present invention can store a large amount of cold capacity by accommodating a large amount of solid and / or liquid cold storage medium through the cold storage unit, which can meet the pre-cooling and / or preservation needs of agricultural products, and discharge the liquid cold storage medium to the outside through the discharge unit, which can discharge excess liquid cold storage medium during transportation, thereby reducing weight and lowering transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of a mobile fresh-keeping box according to a preferred embodiment of the present invention;

[0017] Figure 2 yes Figure 1 In the diagram from another angle, a door is omitted to show the internal structure;

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure after removing the box;

[0019] Figure 4 yes Figure 3 A schematic diagram of the structure from another angle;

[0020] Figure 5 yes Figure 2 Schematic diagram from another angle;

[0021] Figure 6 yes Figure 5 Partial enlarged view;

[0022] Figure 7 It is a schematic structural diagram of the water tank of the present invention;

[0023] Figure 8 is a structural schematic diagram of a water tank according to another embodiment of the present invention;

[0024] Figure 9 yes Figure 8 Cross-section along the AA direction;

[0025] Figure 10 is a structural schematic diagram of a water tank according to another embodiment of the present invention;

[0026] Figure 11 yes Figure 10 Cross-section along BB direction;

[0027] Figure 12 It is a structural schematic diagram of a water tank according to another embodiment of the present invention;

[0028] Figure 13 Schematic diagram of a heat exchanger body and a heat exchange fan in one embodiment of the present invention;

[0029] Figure 14 is a schematic diagram of a heat exchanger body and a heat exchange fan in another embodiment of the present invention;

[0030] Figure 15 is a schematic diagram of a heat exchanger body and a heat exchange fan in another embodiment of the present invention;

[0031] Figure 16 is a schematic diagram of installing a heat exchanger in one embodiment of the present invention;

[0032] Figure 17 Schematic diagram of a cold storage unit, a cold supply unit, and a discharge unit in one embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to 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 those skilled in the art based on the embodiments are all within the scope of protection of the present invention.

[0034] Please refer to Figures 1 to 17 FIG. 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.

[0035] The mobile fresh-keeping box 100 includes a cooling unit 10, a cooling storage unit 20, a cooling supply unit 30, a discharge unit 40, a humidification unit 50, and an electronic control unit 60. The mobile fresh-keeping box 100 can be a whole unit or assembled from independent modules.

[0036] The cooling unit 10 includes any unit requiring cooling. The cooling unit 10 is a single unit, or it includes multiple sub-cooling units separated by at least one partition structure 11. The cooling supply unit transmits cooling energy to each sub-cooling unit, and the cooling energy provided to at least one of the sub-cooling units is independently controlled, achieving block cooling and more flexible usage scenarios.

[0037] 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 an insulated box. The storage box 12 is used to store agricultural products, and the cooling unit 30 provides cooling to the storage box 12 to pre-cool and / or preserve the agricultural products.

[0038] 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, when loading and unloading goods, 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, avoiding the intermediate turnover process of traditional cold chain vehicles and greatly improving transportation efficiency.

[0039] In this embodiment, several partition structures 11 are spaced apart along the longitudinal direction of the storage box 12, and the partition structures 11 are arranged generally parallel to the door 13. The storage areas 14 are filled one by one, starting with the storage area 14 farthest from the door 13. Once a storage area 14 is filled, the goods in that area 14 are pre-cooled. Of course, in other embodiments, the door 13 can also be positioned on the side of the storage box 12, so that the door 13 and the partition structures 11 are arranged perpendicularly.

[0040] In one embodiment, the partition structure 11 is a flexible partition structure, which is simple to set up and flexible and deformable, making it ideal for use in various scenarios, such as door curtains. To prevent cold energy from the storage area 14 from leaking outward, the flexible partition structure's length in the vertical direction is not less than, and preferably greater than, the height of the storage box 12; and the flexible partition structure's width is not less than, and preferably greater than, the width of the storage box 12. This ensures that both the upper and lower sides, as well as the left and right sides, of the flexible partition structure can seal against the inner wall of the storage box 12, thereby reducing or sealing the gap between the flexible partition structure and the storage box 12 and thereby reducing cold energy leakage.

[0041] Furthermore, the flexible partitioning structure can be extended vertically. When a large amount of cargo needs to be placed in storage area 14, the top of the flexible partitioning structure tilts outward, temporarily increasing the space within storage area 14. Preferably, the vertical length of the flexible partitioning structure is less than or equal to 1.5 times the height of storage box 12. Excessive length will cause cargo to pile up at the bottom, causing inconvenience during loading and unloading. Furthermore, if the volume of cargo exceeds the capacity of the expanded space, the excess should be placed in the next storage area. More preferably, the vertical length is less than or equal to (1 + √2) / 2 times the height of storage box 12, meaning that the top half of the flexible partitioning structure tilts outward at a 45° angle.

[0042] 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. The flexible partition structure can be ensured to fit to the bottom wall of the storage box 12 under its own gravity.

[0043] In addition, the material of the partition structure 11 can be selected based on the type of goods stored in the storage area 14 to determine whether to use an insulating partition structure 11. 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 require similar storage temperatures, 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 with the help 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.

[0044] Furthermore, to automate zoned cooling, the electronic 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. The sensor includes a travel switch, a light sensor, a pressure sensor, and an infrared sensor for detecting whether the partition structure 11 is in a closed state.

[0045] In the second embodiment, the sub-cooling units are a plurality of storage boxes 12 that are independently provided. Each storage box 12 can be the storage box 12 in the first embodiment, and the interior thereof can be partitioned or unpartitioned.

[0046] 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.

[0047] The structure and shape of the cold storage box 201 are not limited, and it is used to accommodate 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 provide cold energy to the cold demanding unit 10 through the cold supply unit 30.

[0048] The cold storage medium includes both single-component cold storage media, such as water and alcohol, and multi-component cold storage media, such as salt water mixtures, alcohol water mixtures, and salt-alcohol-water mixtures. The appropriate cold storage medium can be selected based on the required cooling capacity and temperature control range.

[0049] In the present invention, the cold storage medium has both solid and liquid states. The solid state is more stable than the liquid state, both in terms of physical storage stability and low entropy stability. However, the solid state is not easily transported, while the liquid cold storage medium is more easily transported to the cooling unit 10 to directly provide cooling. When the solid cold storage medium absorbs heat and undergoes a phase transition to liquid, it absorbs a large amount of heat, releasing a large amount of cooling energy.

[0050] The material of the cold storage box 201 is not limited, but is preferably a material with high strength and not easily corroded, such as a stainless steel box, a PP box, an ABS box, or a fiberglass box.

[0051] The cold storage box 201 includes a first storage area 202 for storing solid and / or liquid cold storage media. 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 storing liquid cold storage media. A certain amount of liquid cold storage media is stored in the second storage area 203 to ensure that it can provide cooling to the cooling unit 10 at any time.

[0052] 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 .

[0053] 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.

[0054] 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 within the cold storage box 201, the solid-liquid separation structure 204 is located within the water tank.

[0055] The solid-liquid separation structure 204 is used to prevent solid cold storage medium from entering the second accommodating area 203. Those skilled in the art will appreciate that the solid-liquid separation structure may also be a filter located at the connection between the cooling unit 30 and the cold storage tank 201. The filter may be fixed to the cold storage tank 201 or to an end of the cooling unit 30, for example, to an end of the first transmission unit 31.

[0056] In the cold storage box 201 having the solid-liquid separation structure 204, the communication modes between the first accommodating area 202 and the second accommodating area 203 include but are not limited to the following:

[0057] 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 .

[0058] 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 set at the bottom of the solid-liquid separation structure 204. According to the principle of communicating vessels, the height of the liquid cold storage medium in the first accommodating area 202 and the second accommodating area 203 is consistent, and the liquid cold storage medium in the first accommodating area 202 can flow quickly into the second accommodating area 203.

[0059] 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 upper middle part of the solid-liquid separation structure 204. The liquid cold storage medium in the first accommodating area 202 will only flow into the second accommodating area 203 when the height reaches the connecting port 205, so that the liquid cold storage medium and the solid cold storage medium have a long contact time and a good heat exchange effect.

[0060] In another specific embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged along 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, in which case the liquid cold storage medium needs to be pumped into the second accommodating area 203 using a water pipe and a water pump.

[0061] 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.

[0062] 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 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.

[0063] In another preferred embodiment, the bottom of the cold storage box 201 is provided with a plurality of raised support portions 206, either integrally or separately from the cold storage box, and a connecting channel 208 connecting the gaps 207 between adjacent raised support portions 206. The raised support portions 206 not only strengthen the bottom of the cold storage box 201 but also support the solid cold storage medium. The areas above the raised support portions 206 constitute the first accommodation area 202, and the gaps 207 between the raised support portions 206 are connected by the channel to form the second accommodation area 203. If the cold storage box 201 is a water tank, or if a water tank is provided within the cold storage box 201, the raised support portions 206 are located at the bottom of the water tank.

[0064] In one embodiment, the raised support portions 206 are ribs, the connecting passages 208 are located at the ends or middle portions of the ribs, and the gaps 207 between adjacent ribs and the connecting passages 208 together constitute the second accommodation area 203. In another embodiment, the raised support portions 206 are independently provided protrusions, and the gaps 207 between adjacent protrusions are interconnected through the connecting passages 208 to form the second accommodation area 203.

[0065] In another preferred embodiment, the bottom of the cold storage box 201 has at least one depression and a connecting channel 208 communicating with the at least one depression. Above the depression is the first accommodating area 202, and the at least one depression and the connecting channel 208 constitute the second accommodating area 203. When the cold storage box 201 is a water tank, or when a water tank is provided within 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.

[0066] Furthermore, the cold storage unit 20 includes at least a cold inlet 209 for adding a solid cold storage medium and a cold cover for opening or closing the cold inlet 209. The cold inlet 209 is preferably located at the top or side of the cold storage unit 20 to facilitate rapid loading of the solid cold storage medium and quickly store a large amount of cold energy to meet the cold energy requirements of the agricultural product pre-cooling process.

[0067] In a specific embodiment, the cold storage unit 20 of the present invention is described using water as an example of a cold storage medium. In solid form, it is ice cubes, and in liquid form, it is water. Before cold chain transportation, a sufficient amount of stable ice cubes is added to the cold storage tank 201 based on the required cooling capacity to achieve rapid cold storage. After the ice cubes absorb heat, their temperature rises or they melt into water. The mixture of water and ice cubes is called an ice-water mixture, at which point the water temperature is relatively low, around 0°C. The cooling unit 30 transmits the cold water to the cooling unit 10. After heat exchange with the cooling unit 10, the cold water increases in temperature and then flows back to the cold storage tank 201 to exchange heat with the ice cubes and / or ice water.

[0068] It should be noted that if the cold storage unit 10 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, it is necessary to add some water to the cold storage tank 201 after loading the ice cubes. This water will then be supplied to the cold storage unit 10. The higher temperature return water will exchange heat with the ice cubes, and the water in the cold storage tank 201 will increase. If there is still some time before the fresh-keeping box is transported to the destination and loaded with agricultural products after rapid cold storage, some of the ice cubes will melt into water during this time to form an ice-water mixture, so there is no need to add cold water at the beginning.

[0069] 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.

[0070] Specifically, the holding 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.

[0071] Alternatively, a water tank with an upward opening 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 above the water tank and enhancing the strength of the water tank to prevent it from breaking.

[0072] Alternatively, a water tank with an upward opening 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.

[0073] Alternatively, a water tank with an upward opening is provided in the cold storage box 201, and 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 not only stabilize the solid cold storage medium, but also prevent the solid cold storage medium from directly hitting the water tank.

[0074] Based on all the above embodiments, the holding 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.

[0075] Furthermore, the cold storage unit 20 further includes a buffer structure (not shown) located inside the 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 cushion, a traction structure, and an elastic structure.

[0076] In the second scenario, the first storage area 202 and the second storage area 203 are two storage containers connected by a connecting pipe. Preferably, the connecting pipe is equipped with an on / off valve or a liquid pump to circulate the cold storage medium between the first storage area 202 and the second storage area 203. The main difference from the first type of cold storage box 201 lies in the connection method between the two storage areas, and other details are not further described.

[0077] In the second type of cold storage box 201, the first storage area 202 and the second storage area 203 are independently arranged and not connected. The cold storage medium in the first storage area 202 directly or indirectly provides cooling to the cold storage medium in the second storage area 203. The main difference from the first type of cold storage box 201 lies in how the cold storage medium in the two storage areas conducts heat, and other details are not further explained.

[0078] In one embodiment, the second accommodating area 203 is embedded within the first accommodating area 202, or the first accommodating area 202 is embedded within the second accommodating area 203, or the second accommodating area 203 and the first accommodating area 202 are adjacent to each other, and heat is transferred between the two areas via thermal radiation. Preferably, the partition wall between the two accommodating areas is a metal wall or other plate material with good thermal conductivity.

[0079] In another embodiment, the cold storage unit 20 further includes a heat transfer structure, a portion of which is located in the first accommodation area 202, and another portion of which is located in the second accommodation area 203. The heat transfer structure includes but is not limited to a heat transfer rod, a heat transfer sheet, a heat pipe, etc.

[0080] In another embodiment, the cold storage unit 20 further includes a bypass heat pipe communicating with the first storage area 202 and a bypass pump connected to the bypass heat pipe, wherein a portion of the bypass heat pipe is located within the second storage area 203; or the cold storage unit 20 further includes a bypass heat pipe communicating with the second storage area 203 and a bypass pump connected to the bypass heat pipe, wherein a portion of the bypass heat pipe is located within the first storage area 202. When the bypass pump is activated, liquid cold storage medium flows within the bypass heat pipe and transfers the cold energy of the cold storage medium in the first storage area 202 to the cold storage medium in the second storage area 203.

[0081] The second type of cold storage unit 20 contains a liquid cold storage medium, which facilitates the provision of cold to the cold-requiring unit 10 via the cold supply unit 30. The only difference from the first type of cold storage unit 20 is that the first and second storage areas 202 and 203 are the same storage area, and other details are not repeated here.

[0082] Based on the aforementioned cold storage unit 20, the present invention also provides a rapid cold storage system that rapidly adds a solid cold storage medium to the cold storage box 201, thereby achieving rapid cold charging. Compared to traditional methods that convert the cold storage medium from liquid to solid via a refrigeration unit or cold charging machine, this system provides a faster cold charging speed and a large amount of cold storage in a short period of time, which can meet the pre-cooling needs of agricultural products.

[0083] The cooling unit 30 is a medium for transmitting the cooling energy stored in the cooling medium to the cooling unit 10 .

[0084] The first type of cooling unit 30 is applicable to the above two types of cooling storage units 20. The cooling unit 30 is used to transfer liquid cooling storage medium to the cooling demand unit 10 to directly provide cooling thereto.

[0085] The cooling unit 30 includes a heat exchanger 32 positioned at the cooling unit 10, a first transfer unit 31 that transfers a liquid cooling medium to the heat exchanger 32, and a drive pump that drives the cooling medium. The cooling medium exchanges heat with the cooling unit 10 within the heat exchanger 32 without direct contact, resulting in a soft heat transfer process that does not damage the cooling unit 10.

[0086] Preferably, the cooling unit 30 further includes a second transmission unit 33 that transmits the cold storage medium from the heat exchanger 32 to the cold storage unit 20. The cooling unit 30 transmits the relatively low-temperature liquid cold storage medium to the heat exchanger 32 via the first transmission unit 31. The cold storage medium undergoes heat exchange with the cooling unit 10 in the heat exchanger 32, causing the temperature of the cold storage medium to rise. The cold storage medium then returns to the cold storage unit 20 via the second transmission unit 33. Simultaneously, the cooling unit 30 continues to transmit the relatively low-temperature liquid cold storage medium to the heat exchanger 32, forming a dynamic cycle that continuously provides cooling to the cooling unit 10.

[0087] The heat exchanger 32 may be a direct cooling heat exchanger, including at least one heat exchanger body 321 . The heat exchanger body 321 includes heat exchange tubes and preferably also includes heat dissipation fins to increase the heat exchange area.

[0088] The heat exchanger 32 includes at least two heat exchanger bodies 321, which are arranged vertically and / or horizontally. When arranged vertically, cooling is distributed more evenly across the entire surface; when arranged horizontally, cooling is facilitated in horizontally zoned areas. For convenience, when describing the relationship between the heat exchange blower 322 and the heat exchanger body 321, the at least two heat exchanger bodies 321 may be described as a whole: the heat exchanger body 321 includes at least two sub-heat exchanger bodies 321 arranged horizontally and / or vertically.

[0089] The heat exchanger 32 can also be equipped with a heat exchange fan 322 based on the direct cooling heat exchanger. When the cooling unit 10 requires a large amount of cooling, the heat exchange fan 322 is activated 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 activated.

[0090] In the present invention, the heat exchange fan 322 is divided into two types according to its function:

[0091] The first type is that the heat exchanger body 321 is located on the air outlet side or air intake side of the heat exchange fan 322, and the cooling unit 10 is located on 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 actually constitutes an air-cooled heat exchanger, which is suitable for the cooling unit 10 that is not afraid of cold wind.

[0092] Secondly, 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 with the heat exchanger 32, but it does not want the cold air to be blown to the cooling unit 10. In essence, it is still a direct cooling heat exchanger.

[0093] Specifically, the heat exchanger body 321 is located in the air intake or outlet area of ​​the heat exchange blower 322, and the cooling unit 10 is located in the non-outlet area of ​​the heat exchange blower 322. Air passes through the heat exchanger 32 but does not blow toward the cooling unit 10, or only a small amount of edge air blows toward the cooling unit 10, preventing the cold air from directly blowing toward the cooling unit 10 and damaging it.

[0094] 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 on the air outlet side of the heat exchange fan 322. For example, the heat exchange fan 322 is located below the heat exchanger body 321 and blows directly upward, and the cooling unit 10 is located below the heat exchange fan 322.

[0095] In another embodiment, the heat exchanger body 321 has a first side and a second side distributed along a first direction on both sides of the heat exchanger body 321. The cooling unit 10 is located on the first side, and the heat exchange fan 322 is disposed 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 a horizontal direction, with its output blowing horizontally toward the heat exchanger body 321. This prevents cold air passing through the heat exchanger body 321 from blowing directly toward the bottom of the heat exchanger body 321 and damaging the cooling unit 10.

[0096] Preferably, if Figures 13 to 15 As shown, the outlet centerline 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, preventing 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.

[0097] 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°, and more preferably between 40° and 50°. The wind passes through most areas of the heat exchanger body 321 but does not blow towards the cooling unit 10.

[0098] Furthermore, if Figure 15 As shown, the heat exchanger 32 includes at least two heat exchange fans 322, which are located on opposite sides of the heat exchanger body 321 along the second direction. Air is blown simultaneously from opposite sides into the heat exchanger body 321, improving heat exchange efficiency. The airflow from the two directions offsets each other to a certain extent, preventing cold air from blowing toward the first side of the heat exchanger body 321.

[0099] 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 arranged on two opposite sides of the heat exchanger body 321 is located on the heat exchanger body 321.

[0100] 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 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 can also exceed the heat exchanger body 321 and be 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.

[0101] The inventors further discovered that: with the line connecting the heat exchange fans 322 on both sides of the heat exchanger body 321 as the baseline, the greater the inclination angle a of the heat exchange fans 322, the greater the distance between the intersection point and the baseline; and the greater the inclination angle a of the heat exchange fans 322, the less wind is blown toward the cooling unit 10, and the closer it is to direct cooling. Therefore, if Figure 14 As shown, the outlet axis of the heat exchanger fan 322 is offset from the center of the heat exchanger body 321 along the direction from the first side to the second side toward the first side, with the offset distance being within 1 times the width of the heat exchanger body 321 along the first direction. Preferably, when the heat exchanger body 321 is located on the outlet side of the heat exchanger fan 322, the heat exchanger fan 322 is flush with the portion of the heat exchanger body 321's center axis along the first direction facing the first side. For example, assuming the first side is the bottom of the heat exchanger body 321 and the second side is the top of the heat exchanger body 321, 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.

[0102] Correspondingly, when the heat exchanger body 321 is located on 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.

[0103] It should be noted that the "cooling unit 10" described above is the part that actually receives the cooling 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 real "cooling unit" that receives the cooling energy.

[0104] Preferably, the heat exchange area is located above the storage area 14, so that cooling is supplied from top to bottom, resulting in a relatively uniform temperature across the entire storage area 14. Alternatively, the heat exchange area is located horizontally to one side of the storage area 14 to avoid interfering with loading and unloading. Alternatively, the heat exchanger 32 is located on the side of the storage box 12 away from the door 13 to prevent cooling leakage. Alternatively, the heat exchanger 32 is located on one of the doors 13 for ease of maintenance.

[0105] 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 the cold air is blown into the storage box 12 to prevent the cold air from leaking out.

[0106] 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 heat exchanger body 321 with a cold storage component, an evaporator of a refrigeration unit or other cold sources.

[0107] The heat exchanger 32 is preferably disposed on the top of the storage box 12 and 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:

[0108] The heat exchanger is directly fixed to the top wall of the storage box via a first fixing structure. The first fixing structure is a fixing nail that extends upward through the bottom of the heat exchanger 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.

[0109] The heat exchanger 32 is indirectly fixed in the storage box via a second fixing structure 324 .

[0110] In one embodiment, the second fixing structure 324 includes a keel frame and a fixing bracket that secures the keel frame to the storage box. The keel frame includes crisscrossing brackets with sufficient load-bearing capacity to secure the heat exchanger to the keel frame. This fixing method can be achieved by fixing the heat exchanger to the keel frame with fixing nails or by hanging the heat exchanger from the keel frame's suspension structure.

[0111] In another embodiment, if Figure 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.

[0112] 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.

[0113] 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.

[0114] Preferably, the support frame is disposed proximate to the side wall of the storage box. In another preferred embodiment, the second fixing structure 324 includes at least two spaced-apart sliding frames, each of which is secured by at least two securing frames. Furthermore, the securing frames of the two sliding frames are aligned or staggered in the direction in which the sliding frames extend.

[0115] 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 tank 201 and the heat exchanger 32 under the action of the driving pump. The following description will focus on the connection relationship between the first transmission unit 31, the second transmission unit 33, and the cold storage unit 20.

[0116] The first type of cold storage unit 20, which communicates with the first and second storage areas 202 and 203, is connected as follows: In a preferred embodiment, the first transmission unit 31 communicates with the second storage area 203 to ensure sufficient flow of liquid cold storage medium to prevent the drive pump from idling and inhaling air. The second transmission unit 33 communicates with the first storage area 202, and the returned high-temperature cold storage medium exchanges heat with the solid and / or liquid cold storage medium in the first storage area 202.

[0117] Preferably, the reflux port of the second transfer unit 33 is located above the first storage area 202, so that the reflowing cold storage medium enters the first storage area 202 from the top downward and fully exchanges heat with the solid and / or liquid cold storage medium. Of course, the reflux port of the second transfer unit 33 can also be located in the middle or lower part of the first storage area 202.

[0118] Furthermore, the second transmission unit 33 includes a return pipe 331 located above the first accommodating area 202, and a plurality of return ports are provided on the return pipe 331. Preferably, along the return pipe 331, the diameter of the return port increases and / or the setting density of the return port increases in the direction away from the heat exchanger 32. The increase in the setting density includes an increase in the number of the return ports, a decrease in the spacing between the return ports, etc. With such a design, the pressure change of the liquid cold storage medium in the return pipe 331 is exactly opposite, so that the refluxed cold storage medium can enter the cold storage box 201 evenly.

[0119] Of course, the second transmission unit 33 may also be in communication with 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.

[0120] 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 , and will not be described in detail herein.

[0121] 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 embodiment, which will not be repeated here.

[0122] Based on the description of the cooling units above, one or more heat exchangers can be connected in series between each set of first and second transmission units 31, 33. The multiple heat exchangers 32 connected in series can provide cooling for a single storage area or for multiple different storage areas. In a preferred embodiment, each storage area 14 is cooled by a set of first and second transmission units, and the cooling is independently controlled by one or more heat exchangers connected thereto.

[0123] The second type of cooling unit 30 includes a circulation pipeline, a cooling medium flowing within the circulation pipeline, and a driving element for driving the cooling medium within the circulation pipeline. When the cooling medium is liquid, the driving element is a water pump; when the cooling medium is gaseous, the driving element is a fan.

[0124] 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 inside 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 .

[0125] 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 and are not described in detail here.

[0126] Preferably, the fresh-keeping box 100 includes at least any two of the above-mentioned cooling units 30, and can provide cooling to the cooling-requiring unit 10 through at least two cooling supply methods. On the one hand, it can adapt to different cooling-requiring units 10; on the other hand, when the cooling-requiring unit 10 requires a large amount of cooling, at least two cooling units 30 can be turned on, and when the cooling-requiring unit 10 does not require a large amount of cooling, one of them can be selected to provide cooling.

[0127] The aforementioned heat conduction arrangement and heat conduction connection refer to the ability to directly or indirectly exchange heat between the two. Furthermore, any of the aforementioned cold storage units 20 can be used in conjunction with any of the aforementioned cold supply units 30 to form a cold storage and cooling system. This cold storage and cooling system provides a friendly low-temperature environment for fruits and other agricultural products, effectively storing them in a winter environment.

[0128] The present invention achieves rapid cold storage by adding a solid cold storage medium to the cold storage box 201. After the goods are loaded into the storage box 12, the cooling unit 30 rapidly supplies cold energy to the storage box 12 for pre-cooling. Once the temperature drops to the refrigeration or freezing temperature, the pre-cooling phase ends, and the cooling unit 30 begins providing cold energy in the second cooling mode, entering the refrigeration or freezing phase. The cooling capacity during the pre-cooling phase is greater than that during the refrigeration or freezing phase.

[0129] As can be seen from the above, the mobile fresh-keeping box 100 of the present invention can be transported by vehicle and can reach agricultural product bases as long as there is a road, making it very close to the product picking site. Furthermore, the large amount of cold energy stored in the cold storage unit 20 enables pre-cooling. This pre-cooling process is not restricted by whether the product base has power or a refrigerant, and can achieve pre-cooling at the production site. Goods can be loaded directly from the source and delivered directly to the destination, avoiding the intermediate turnover process of traditional cold chain vehicles and greatly improving transportation efficiency.

[0130] After the agricultural products are picked, they can be put into the storage box 12 at the first time. 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. They can be packed and pre-cooled at the agricultural product base, locking in freshness in time to ensure taste and quality.

[0131] 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, after pre-cooling, they can enter the refrigeration or freezing stage without transportation. Compared with traditional cold chain transportation, there is no need for multiple transportation, which reduces the damage to agricultural products caused by collision and squeezing.

[0132] 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 loading and going, 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 fresh-keeping 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.

[0133] The inventors further discovered that the cold storage unit 20 is used to hold a large amount of solid cold storage medium to meet the demand for pre-cooling of goods, but this part of the cold storage medium will increase the transportation cost. Moreover, during the above-mentioned cooling or supplying 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. For this reason, the present invention further provides a discharge unit 40 to discharge the liquid cold storage medium outward. 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.

[0134] The discharge unit 40 is an optional unit added as needed, and can be closed or removed.

[0135] In one embodiment, the discharge unit 40 includes a first discharge port 401 communicating with the cold storage unit 20 . Alternatively, 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 .

[0136] Specifically, the first discharge port 401 is provided on the cold storage box 201. When the liquid cold storage medium reaches the height of the first discharge port 401, it is automatically discharged. 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 to avoid affecting the circulating cooling supply.

[0137] 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 .

[0138] Alternatively, the discharge unit 40 may further include a first discharge port 401' formed on the first transmission unit 31; or a first discharge pipe 402' connected to the first transmission unit 31. The first discharge port 401' and the first discharge pipe 402' may also discharge waste or discharge the released cold storage medium after transport.

[0139] Furthermore, the discharge unit 40 also includes a first discharge valve that opens or closes the first discharge port 401 / 401' or the first discharge pipe 402 / 402'. This first discharge valve allows for controllable discharge in terms of time, space, and temperature. For example, discharge can occur during at least one of the pre-cooling, refrigeration, or freezing stages, preferably after pre-cooling and before returning to the vehicle to reduce vehicle power consumption. Alternatively, discharge can occur in remote areas, avoiding toll booths and urban areas.

[0140] In another embodiment, the discharge unit further 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 further 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.

[0141] 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 exchanging heat with the solid cold storage medium before being discharged, thereby avoiding cold loss.

[0142] Furthermore, the discharge unit also includes a sensor for detecting the amount of liquid cold storage medium in the cold storage tank 201. When the amount of liquid cold storage medium in the cold storage tank 201 reaches the highest line, the second discharge valve is opened to fully discharge the cold storage medium. When the amount of liquid cold storage medium in the cold storage tank 201 reaches the middle line, the second discharge valve is half-opened, and part of the refluxed cold storage medium is discharged to the outside and part flows back into the cold storage unit 20, thereby avoiding a sharp decrease in the liquid cold storage medium in the cold storage tank 201. When the amount of liquid cold storage medium in the cold storage tank 201 reaches the lowest line, the second discharge valve is closed, and the cold storage medium flows back into the cold storage unit 20.

[0143] 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 second 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.

[0144] In addition, for ease of assembly, the present invention modularizes the cold storage unit 20 into a cold storage module. The cold storage module includes any of the cold storage units 20 described above and further includes at least one set of cooling outlet ports for connection to the cooling supply unit 30 to allow the liquid cooling medium to flow out and back. In this case, the cooling supply unit includes a cooling outlet port that connects to the cooling outlet port to transfer the cooling energy of the cooling medium to the cooling demand unit 10.

[0145] The cooling outlet port for the outflow of the liquid cold storage medium is connected to the first transmission unit 31, and is connected to the cold storage tank 201 in the same manner as the first transmission unit 31 and the cold storage tank 201. The cooling outlet port for the return flow of the liquid cold storage medium is connected to the second transmission unit 33, and is connected to the cold storage tank 201 in the same manner as the second transmission unit 33 and the cold storage tank 201.

[0146] 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 thereon may be used as part of the cold storage module.

[0147] The cold storage module may further include any of the above-mentioned discharge units 40 .

[0148] 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.

[0149] The cooling units 30 correspond to the cooling demand units 10 on a one-to-one basis, and each cooling unit 30 provides cooling to one or more cooling demand units 10 corresponding thereto.

[0150] The cooling unit 10 includes a storage box 12 having one or more storage areas 14. In terms of spatial arrangement, all the storage areas 14 are located on the same side of the cooling unit 20; or, the cooling unit 20 is located in the middle of the at least one storage area 14.

[0151] For example, a storage box 12 may have multiple storage areas 14, and the cold storage unit 20 may be located on one side of the storage box 12, with all storage areas 14 located on the same side. Alternatively, the cold storage unit 20 may be located in the middle of the storage box 12, providing cooling to the storage areas 14 on both sides. Alternatively, multiple storage boxes 12 may be arranged around the cold storage unit 20.

[0152] Furthermore, the cooling port 209 is provided on the wall of the cold storage unit 20 located within the portion of the storage box 12, or the cooling port 209 is provided on a wall adjacent to or shared by the cold storage unit 20 and the portion of the storage box 12. In this case, the cooling port 209 opens into the storage box 12, thereby preventing unnecessary leakage of cold, which would require adding cold storage medium 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 cold storage medium can be added while loading and unloading goods into the storage box 12, further facilitating the replenishment of cold storage medium mid-transit.

[0153] When transporting agricultural products such as fruits and vegetables, the pre-cooling and fresh-keeping box of the present invention requires replacement of the air within the storage box 12 due to respiration. Conventional methods typically incorporate an air intake window at the front of the storage box 12. This window is opened approximately ten hours into the journey, allowing air to rapidly enter the box. This deteriorates the air quality within the box 12 during this period. Furthermore, the high-temperature air passing through the box can raise the temperature, disrupting the cold chain.

[0154] To solve one of the above problems, the 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 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.

[0155] We control the amount of air entering the storage box 12 by controlling the area of ​​the first opening, allowing the gas entering the box to be 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 times and 2 times the volume of the mobile fresh-keeping box, or the air intake per hour can replace the air in the box 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 will have more air replacement times.

[0156] 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.

[0157] Furthermore, 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 near the first opening are smaller than the ventilation holes on the partition structures 11 near the second opening.

[0158] Preferably, the container further includes a shielding portion that cooperates with the vents. The shielding portion has an area larger than the vents, and the upper portion of the shielding portion is fixed, with the remaining ends being free. Thus, during loading, the shielding portion can shield the vents under the action of gravity, reducing the risk of cooling air leaking through the vents. During transportation, the shielding portion is blown up by the wind, facilitating air circulation.

[0159] 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.

[0160] In one embodiment, the cold storage unit 20 is disposed at the front side of the storage box 12. A communication port for air circulation is provided between the storage box 12 and the cold storage unit 20, and the first opening is in communication with the cold storage unit 20. After entering through the first opening, air first passes through the cold storage box 201, undergoes heat exchange with the cold storage medium, and then enters the storage box 12 behind it after its temperature is lowered, thereby preventing large temperature fluctuations within the storage box 12.

[0161] 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. 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 lowered.

[0162] 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 .

[0163] 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.

[0164] 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.

[0165] In another embodiment, the air entering from the first opening exchanges heat with the exhaust unit 40 and then enters the storage box 12 .

[0166] 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 .

[0167] 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.

[0168] The fresh air heat exchanger at least includes a heat exchange tube and heat exchange fins.

[0169] 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.

[0170] 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.

[0171] 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. The storage box 12 is humidified through the humidifying pipe 503 .

[0172] Specifically, the humidification tube 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 electronically controlled nozzle, which can be individually controlled to humidify each storage area 143. Of course, multiple humidification tubes can also be provided in communication with the humidifier, with each humidification tube humidifying a storage area, thereby achieving more precise humidity control.

[0173] Furthermore, a water supply pipe 502 is connected to the water tank of the humidifier to add water thereto. Preferably, the cold storage medium is water, and low-temperature water is provided thereto by 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.

[0174] In one embodiment, the other end of the water supply pipe 502 is in communication with the cold storage unit 20 . Specifically, the water supply pipe 502 is in communication with the first accommodating area 202 or the second accommodating area 203 .

[0175] 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.

[0176] 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.

[0177] Alternatively, the water tank of the humidifier 501 is arranged to exchange heat with the cold storage unit to obtain cold energy 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 humidifying unit 50 further includes a cold transfer pipe, a cold transfer medium flowing in the cold transfer pipe, and a driving element for driving the cold transfer medium to flow in the cold transfer pipe, a portion of the cold transfer pipe is arranged to conduct heat with the cold storage unit 20, for example, a portion of the cold transfer pipe is located in the cold storage unit 20, preferably in direct contact with the cold storage medium; another portion 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.

[0178] 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.

[0179] The humidifying unit 50 also includes an overflow pipe 505 connected to the water tank of the humidifier 501. 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. This arrangement eliminates the need for electronically controlled water addition, saves electricity, and improves reliability. Of course, an electric valve can also be installed on the water addition pipe 502 to control whether water is added based on the water level in the humidifier water tank measured by a water level meter or other device.

[0180] 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.

[0181] The present invention further 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 includes a car, a ship, an airplane, and the like.

[0182] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A mobile fresh-keeping box, characterized in that: include: The cooling unit includes a storage box, wherein the storage box is provided with a heat exchange area and at least one storage area; A cold storage unit for accommodating solid and liquid cold storage media; The cooling unit transfers the cooling capacity of the cooling medium to the cooling unit; the cooling unit includes a heat exchanger arranged in the heat exchange area, a first transmission unit for transmitting the liquid cooling medium from the cooling unit to the heat exchanger, a second transmission unit for transmitting the cooling medium from the heat exchanger to the cooling unit, and a driving pump for 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 side and a second side distributed on both sides of the heat exchanger body along a first direction, the storage area is located on the first side, and the heat exchange The heat exchanger body is a cold source arranged in the storage box, the heat exchanger body is located in the air suction area or air outlet area of ​​the heat exchange fan, the storage area is located in the non-air outlet area of ​​the heat exchange fan, the heat exchange 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 exchange fans are distributed on two sides of the heat exchanger body that are opposite to each other along the second direction; the air outlet center line of the heat exchange fan is inclined to the second side, and the intersection of the air outlet center lines of the heat exchange fans arranged on the two sides of the heat exchanger body that are opposite to each other is located on the heat exchanger body; A discharge unit for discharging liquid cold storage medium to the outside; the discharge unit also includes a second discharge port opened on the second transmission unit and a second discharge valve for opening or closing the second discharge port; or the discharge unit also includes a second discharge pipe connected to the second transmission unit and a second discharge valve for opening or closing the second discharge pipe.

2. The mobile fresh-keeping box according to claim 1, characterized in that: The discharge unit includes a first discharge port opened on the cold storage unit, Alternatively, the discharge unit includes a first discharge port opened on the cold storage unit and a first discharge pipe connected to the first discharge port.

3. The mobile fresh-keeping box according to claim 2, characterized in that: The distance between the first discharge port and the bottom of the cold storage unit is greater than or equal to 20 centimeters.

4. The mobile fresh-keeping box according to claim 3, characterized in that: The cold storage unit further includes a cold storage box, the cold storage box including a first accommodating area for accommodating a solid and / or liquid cold storage medium and a second accommodating area for accommodating a liquid cold storage medium, the first discharge port being in communication with the first accommodating area, or the first discharge port being in communication with the second accommodating area; Alternatively, the cold storage unit further includes a cold storage box, the cold storage box includes a first accommodating area for accommodating solid and liquid cold storage media, and the first discharge port is communicated with the first accommodating area.

5. The mobile fresh-keeping box according to claim 1, characterized in that: The discharge unit further includes a first discharge port opened on the first transmission unit; or, the discharge unit includes a first discharge pipe connected to the first transmission unit.

6. The mobile fresh-keeping box according to any one of claims 2 to 5, characterized in that: The discharge unit includes a first discharge port, and the discharge unit further includes a first discharge valve that opens or closes the first discharge port.

7. The mobile fresh-keeping box according to any one of claims 2 to 5, characterized in that: The discharge unit includes a first discharge pipe, and the discharge unit further includes a first discharge valve that opens or closes the first discharge pipe.

8. The mobile fresh-keeping box according to claim 4, characterized in that: The discharge unit further includes a sensor for detecting the amount of the liquid cold storage medium in the cold storage tank.

9. The mobile fresh-keeping box according to claim 1, characterized in that: The discharge unit further includes a first discharge port provided on the cold storage unit and a first discharge valve for opening or closing the first discharge port; or the discharge unit further includes a first discharge port provided on the cold storage unit, a first discharge pipe communicating with the first discharge port, and a first discharge valve for opening or closing the first discharge pipe; The discharge unit further includes a first sensor for detecting the temperature of the liquid cold storage medium in the cold storage unit or the cold storage medium in the first transmission unit, and a second sensor for detecting the temperature of the cold storage medium in the second transmission unit or the cold demanding unit.

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

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