Cold chain box

Abstract

A cold chain box comprises a storage chamber, a cold supply system for supplying cold energy to the storage chamber and a power supply system for supplying power to the cold supply system, the cold supply system comprises a cold storage assembly, and the cold storage assembly comprises a cold storage pool for storing cold storage liquid, a cold storage pipe arranged in the cold storage pool in a penetrating mode and a pair of cold charging connectors connected with the cold storage pipe; the refrigerating system comprises a compressor, a condenser, a throttling element and an evaporator; the cold releasing assembly comprises a heat exchanger communicated with the cold accumulation pipe, a cold releasing pump for driving a secondary refrigerant to circularly flow in the heat exchanger and the cold accumulation pipe, an air duct communicated with the heat exchanger and the storage chamber, and an air cooler located on one side of the heat exchanger, and the evaporator is located in the air duct. According to the cold chain box, the refrigerating system, the cold storage assembly and the cold release assembly are organically combined together and share the same cold release assembly, the space utilization rate is high, the two systems are associated, and benefit maximization is achieved.

Description

Technical Field

[0001] The utility model relates to the field of cold chain, in particular to a cold chain box. Background Art

[0002] Traditional cold chain transportation equipment is mainly refrigerated trucks, which provide cooling through refrigeration systems. However, due to the power of the power supply and refrigeration system, cold chain equipment cannot be popularized and has limited application scenarios, and is only used for short-distance cooling.

[0003] The industry has already applied the technology of storing cold energy in cold storage materials to cold chain equipment. The cold energy stored in cold storage materials is limited. Once the stored cold energy is released, the goods will be de-cooled midway. The inventor found in his research that installing cold storage components and refrigeration systems in cold chain equipment at the same time seems to solve this problem. However, the two cooling systems are set up independently, which is just a simple superposition of functions. They cannot work together and will take up a lot of space.

[0004] In view of this, it is necessary to provide an improved cold chain box to solve the above technical problems. Utility Model Content

[0005] The utility model provides a cold chain box, which optimizes the cooling system.

[0006] In order to achieve one of the above-mentioned purposes of the utility model, the utility model adopts the following technical solutions:

[0007] A cold chain box includes a storage room, a cooling system for providing cooling to the storage room, and a power supply system for supplying power to the cooling system, wherein the cooling system includes:

[0008] A cold storage component, the cold storage component comprising a cold storage tank for storing cold storage liquid, a cold storage pipe passing through the cold storage tank, and a pair of cold charging interfaces connected to the cold storage pipe;

[0009] A refrigeration system, the refrigeration system comprising a compressor, a condenser, a throttling element and an evaporator;

[0010] A cooling component includes a heat exchanger connected to the cold storage pipe, a cooling pump that drives the coolant to circulate in the heat exchanger and the cold storage pipe, an air duct connecting the heat exchanger and the storage room, and an air cooler located on one side of the heat exchanger, and the evaporator is located in the air duct.

[0011] Optionally, the evaporator and the heat exchanger are connected as a whole via heat dissipation fins.

[0012] Optionally, the heat exchanger includes straight tubes for heat exchanger and bent tubes for heat exchanger connected to the straight tubes for heat exchanger, and the evaporator includes straight tubes for evaporator and bent tubes for evaporator connected to the straight tubes for evaporator; the straight tubes for heat exchanger are concentrated on the air inlet side of the heat exchanger, and the straight tubes for evaporator are concentrated on the air outlet side of the heat exchanger; or the straight tubes for evaporator are concentrated on the air inlet side of the heat exchanger, and the straight tubes for heat exchanger are concentrated on the air outlet side of the heat exchanger.

[0013] Optionally, the heat exchanger includes straight tubes for heat exchanger and bent tubes for heat exchanger connected to the straight tubes for heat exchanger, and the evaporator includes straight tubes for evaporator and bent tubes for evaporator connected to the straight tubes for evaporator, and the straight tubes for heat exchanger and the straight tubes for evaporator are alternately arranged.

[0014] Optionally, a plurality of heat dissipation fins are simultaneously provided on the straight tubes for the heat exchanger and the straight tubes for the evaporator.

[0015] Optionally, the number of straight tubes used in the heat exchanger is not less than the number of straight tubes used in the evaporator.

[0016] Optionally, along the air flow direction in the air duct, the evaporator is located downstream of the heat exchanger, and the evaporator and the heat exchanger are arranged separately.

[0017] Optionally, the cold storage assembly further includes a cold charging pipe and a cold return pipe respectively connected to a pair of cold charging interfaces;

[0018] The cold storage component further includes at least one heat exchange chip, and the heat exchange chip includes a plurality of first fluid channels and a plurality of second fluid channels arranged alternately; the cold storage tube and the first fluid channel are connected in parallel between the cold charging tube and the cold return tube, and the cold storage component further includes a first flow valve for controlling the flow of the coolant between the cold charging tube and the cold storage tube, and a second flow valve for controlling the flow of the coolant between the cold charging tube and the first fluid channel;

[0019] The second fluid channel is connected to the cold storage tank through a pipeline and a cold charging pump.

[0020] Optionally, the cold chain box also includes a power supply system for supplying power to electrical components.

[0021] Optionally, the cold chain box includes an equipment room located below the storage room, the equipment room includes a cold zone formed by an insulation layer and a hot zone connected to the outside of the cold chain box, the cold storage tank, the heat exchanger, and the air cooler are located in the cold zone, and the compressor, the condenser, and the power supply system are located in the hot zone.

[0022] The beneficial effect of the utility model is that the cold chain box of the utility model organically combines the refrigeration system, the cold storage component and the cold release component, shares the same cold release component, has high space utilization, and associates the two systems to achieve maximum benefit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of a cold chain box in one embodiment of the utility model;

[0024] Figure 2 for Figure 1 Exploded diagram of

[0025] Figure 3 for Figure 1 Exploded view after removing the outer shell and top cover;

[0026] Figure 4 for Figure 1 Top view after removing the top cover;

[0027] Figure 5 for Figure 1 A top view of the equipment room of the cold chain box shown;

[0028] Figure 6 for Figure 1 The schematic diagram of the cold chain box shown is after removing the outer shell, insulation layer and air duct;

[0029] Figure 7 It is a schematic diagram of the connection between the heat exchanger and the cold charging pipe, the cold return pipe, and the heat exchange chip;

[0030] Figure 8 It is a schematic diagram of the connection between the heat exchanger and the cold charging pipe and the cold return pipe;

[0031] Fig. 9 It is a schematic diagram of the coordination between the cold storage tank and the heat exchange chip;

[0032] Fig.10 for Figure 1 A cross-sectional view of

[0033] Fig.11 A schematic diagram of a cold storage tank in one embodiment;

[0034] Fig.12 A schematic diagram of a cold storage tank in another embodiment;

[0035] Fig.13 This is a three-dimensional diagram of a cold chain box in one embodiment of the utility model;

[0036] Fig.14 for Fig.13 A cross-sectional view of

[0037] Fig.15 for Fig.13Exploded diagram of

[0038] Fig.16 for Fig.15 Exploded view of the middle insulation box;

[0039] Fig.17 for Fig.13 A schematic diagram of an equipment room of a cold chain box in the illustrated embodiment;

[0040] Fig.18 for Fig.17 Schematic diagram after removing the incubator, some connecting pipes are not shown;

[0041] Fig.19 for Fig.18 A schematic diagram from another angle;

[0042] Fig. 20 for Fig.19 Schematic diagram of the middle cold storage tank;

[0043] Fig.21 for Fig. 20 Schematic diagram from another angle.

[0044] Among them, 100-cold chain box, -box, 11-shell, 12-insulation layer, 13-partition wall, 14-storage room, 141-convex rib, 15-equipment room, 16-top cover, 2-cold storage component, 21-cold storage tank, 22-cold storage pipe, 221-first cold storage pipe, 222-second cold storage pipe, 23-cold charging interface, 24-cold storage liquid interface, 25-heat dissipation structure, 251-first heat dissipation structure, 252-second heat dissipation structure, 253-casing, 254-heat sink, 255 - heat dissipation pipe, 26-cold charging pipe, 27-return cooling pipe, 28-heat exchange chip, 29-pressure tank; 3-cooling assembly, 31-heat exchanger, 311-first end side, 312-second end side, 32-cooling pump, 33-air duct, 330-wind plate, 331-air outlet duct, 332-first return air duct, 333-sub-air duct, 34-air cooler; 4-refrigeration system, 41-compressor, 42-condenser; 43-evaporator, 44-heat dissipation fins, 5-air conditioning system, 6-power supply system. DETAILED DESCRIPTION

[0045] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0046] In the various drawings of the present invention, for the convenience of illustration, some dimensions of structures or parts are exaggerated relative to other structures or parts, and therefore, are only used to illustrate the basic structure of the subject matter of the present invention.

[0047] like Figure 1 to Figure 21 As shown, a cold chain box 100 of a preferred embodiment of the utility model includes a box body 1, a storage chamber 14 located in the box body 1, a cooling system for providing cooling to the storage chamber 14, a control system communicatively connected to the cooling system, and a power supply system 6.

[0048] The box body 1 includes an outer shell 11 and an insulation layer 12 located inside the outer shell 11. The outer shell 11 is preferably a stainless steel outer shell 11, which has high strength and protects the internal structure. The insulation layer 12 adopts a foaming structure or an injection molding structure with excellent insulation performance to reduce heat exchange between the inside and the outside.

[0049] Optionally, a partition wall 13 is provided in the box body 1 to divide the box body 1 into the storage room 14 and the equipment room 15. Preferably, the partition wall 13 is integrally formed with the side wall forming the storage room 14, and the insulation layer 12 of the storage room 14 has no seams, thereby avoiding cold leakage at the gap and achieving a better cold preservation effect.

[0050] The storage chamber 14 is used to store items to be refrigerated or frozen, especially fresh products. The storage chamber 14 opens upward, and the top cover 16 closes the storage chamber 14 from top to bottom. The user puts items in layer by layer from bottom to top, and takes out items layer by layer from top to bottom. According to the principle that cold air sinks and hot air rises, even when the top cover 16 is opened, the cold air still condenses under the storage chamber 14, and there is no large convection fluctuation between the top and the outside world, and the loss of cold is small. In addition, when only a part of the items need to be taken out, the remaining items are located at the bottom of the storage chamber 14 where the cold air is concentrated, which is more conducive to freshness preservation.

[0051] The equipment room 15 is located below the storage room 14, and houses the cooling system, the control system and the power supply system 6, thereby lowering the center of gravity of the cold chain box 100 in an empty box state, and preventing it from tipping over during hoisting.

[0052] Preferably, the equipment room 15 includes a cold zone formed by an insulation layer 12 and a hot zone connected to the outside of the cold chain box 100. Components that need to be kept cold to prevent cold leakage are located in the cold zone, such as a cold storage tank 21, a heat exchanger 31, and an air cooler 34; components that require manual operation or dissipation of heat to the outside are located in the hot zone, such as a compressor 41, a condenser 42, a control system and a power supply system 6. Other structures can be selectively placed in the cold zone or the hot zone.

[0053] The cold supply system includes a cold storage component 2 and a cold release component 3. The cold storage component 2 is used to be connected to a cold charging machine that provides a low-temperature coolant to obtain and store the cold energy of the coolant. The cold release component 3 is connected to the cold storage component 2 to release the stored cold energy to the outside to provide a low-temperature environment for the goods.

[0054] The cold storage assembly 2 includes a cold storage tank 21 for storing cold storage liquid, a cold storage pipe 22 inserted in the cold storage tank 21, and a pair of cold charging interfaces 23 connected to the cold storage pipe 22. After the cold charging interface 23 is connected to the cold charging machine, the cold charging machine provides a low-temperature coolant with a certain pressure to flow in the cold storage pipe 22, providing cold to the cold storage liquid, and the temperature of the cold storage liquid gradually decreases, and changes from liquid to solid, accumulating a large amount of cold.

[0055] The cold storage tank 21 is used to store cold storage liquid, and the cold storage liquid can be injected during the assembly process. Optionally, the cold storage assembly 2 also includes a pair of cold storage liquid interfaces 24 connected to the cold storage tank 21, and the cold storage liquid can be injected after the cold chain box 100 is assembled. Preferably, at least one cold storage liquid interface 24 is connected to the top of the cold storage tank 21, and acts as an overflow port to accurately detect the amount of cold storage liquid added.

[0056] The cold storage liquid needs to be matched according to the temperature of the storage chamber 14, and the phase change temperature is between -60°C and 20°C. For example, water has a large cold storage capacity and can maintain the storage chamber 14 at 15°C or below, preferably below 10°C, and more preferably 2°C to 8°C, which can provide preservation conditions for a large number of fresh products.

[0057] The cold storage tube 22 is preferably a copper tube, which has good thermal conductivity and strong corrosion resistance; of course, other metal tubes with protective paint can also be used.

[0058] In the present invention, the cold charging interface 23 is located outside the cold storage tank 21, preferably extending to the outside of the cold chain box 100, so as to facilitate connection with the cold charging machine. The cold storage pipe 22 directly passes through the top of the cold storage tank 21 and is connected to the cold charging interface 23, or the cold storage pipe 22 passes through the wall of the cold storage tank 21 and is connected to the cold charging interface 23. Preferably, a hole is opened in the middle and upper part of the side wall of the cold storage tank 21 to avoid the risk of leakage caused by the bottom hole.

[0059] The cold storage assembly 2 also includes a heat dissipation structure 25 located outside at least part of the cold storage tube 22 to increase the heat dissipation area and improve the speed of charging and discharging cold. In the utility model, the cold storage tube 22 includes at least a first cold storage tube 221 and a second cold storage tube 222 connected in parallel, and the area of ​​the heat dissipation structure 25 connected to the first cold storage tube 221 is larger than the area of ​​the heat dissipation structure 25 connected to the second cold storage tube 222.

[0060] In one embodiment, the heat dissipation structure 25 only includes a first heat dissipation structure 251 connected to the first cold storage tube 221, and there is no heat dissipation structure 25 outside the second cold storage tube 222. Therefore, the heat exchange between the first cold storage tube 221 and the surrounding cold storage liquid is better than the heat exchange between the second cold storage tube 222 and the surrounding cold storage liquid.

[0061] The first heat dissipation structure 251 is only provided at a part of the cold storage tube 22, which not only improves the cold charging speed, but also prevents the heat dissipation structure 25 from occupying too much space in the cold storage tank 21, thereby achieving a balance point between the cold charging speed and the cold storage capacity.

[0062] The first heat dissipation structure 251 includes a sleeve 253 sleeved on the cold storage tube 22, a plurality of heat sinks 254 connected to the sleeve 253, and at least one heat dissipation tube 255 connected to at least part of the heat sinks 254. The heat dissipation tube 255 is circumferentially arranged outside the sleeve 253.

[0063] The sleeve 253 is consistent with the shape and size of the cold storage tube 22, so the sleeve 253 and the cold storage tube 22 can be tightly connected without a gap therebetween, that is, there is no "insulating layer" formed by air or cold storage liquid therebetween, and the heat transfer effect is good.

[0064] The heat dissipation tube 255 is spaced apart from the sleeve 253. The area of ​​the heat dissipation tube 255 is much larger than that of the sleeve 253. The heat dissipation tube 255 can exchange heat with the cold storage liquid on both sides. Therefore, under the premise that the area of ​​the heat dissipation fin 254 is constant, the number of heat dissipation fins 254 can be reduced, and the gap between adjacent heat dissipation fins 254 is increased. The cold storage liquid between the heat dissipation tube 255 and the sleeve 253 will not be adsorbed on the surface of the heat dissipation fin 254, which is conducive to the flow of cold storage liquid and the charging / discharging speed is fast.

[0065] Preferably, the area of ​​the heat dissipation pipe 255 is 3 to 100 times the area of ​​the sleeve 253. Alternatively, the equivalent diameter of the heat dissipation pipe 255 is 2 to 10 times, preferably 3 to 5 times, the equivalent diameter of the sleeve 253. If the distance between the heat dissipation pipe 255 and the sleeve 253 is too long, the temperature of the heat dissipation pipe 255 will be affected; if the distance is too short, the heat dissipation area is not large enough.

[0066] In this embodiment, the cross-sections of the sleeve 253 and the heat dissipation pipe 255 are both circular, but are not limited thereto. In particular, the shape of the heat dissipation pipe 255 can be arbitrarily set under the premise of ensuring the heat dissipation area.

[0067] In addition, the heat dissipation pipe 255 may be a full circle extending along the circumferential direction, or may be a plurality of sections arranged at intervals.

[0068] Specifically, the first cold storage pipe 221 includes a plurality of first straight pipe sections and first curved pipe sections connecting adjacent first straight pipe sections. The first heat dissipation structure 251 is sleeved on the first straight pipe sections, and the structure and installation process are simple.

[0069] Preferably, the first straight pipe sections are arranged in an array, and the heat dissipation pipes 255 of adjacent first heat dissipation structures 251 can be close together or spaced apart. It can be understood by those skilled in the art that the denser the first cold storage pipes 221 are, the faster the cold filling speed is, but the volume of the cold storage tank 21 will be occupied, the amount of cold storage liquid will be reduced, and the total cold storage capacity will be reduced; conversely, the sparser the first cold storage pipes 221 are, the slower the cold filling speed is, but the amount of cold storage liquid will increase, the accumulated cold capacity will increase, and the cold preservation time will be extended.

[0070] The second cold storage pipe 222 includes a plurality of second straight pipe sections and a second curved pipe section connecting adjacent second straight pipe sections. Preferably, the first straight pipe sections are arranged in an array, and the second straight pipe sections are inserted between adjacent heat dissipation pipes 255. Preferably, the second straight pipe section is located at the center of the middle area surrounded by the plurality of first heat dissipation structures 251, and the distance between the second straight pipe section and the surrounding first heat dissipation structures 251 is equivalent, and the charging / discharging speed of the cold storage liquid in the middle area is uniform.

[0071] Based on the above embodiments, taking cold charging as an example, when only the second cold storage tube 222 is connected to the cold charging machine, the cold charging speed is slow; when only the first cold storage tube 221 is connected to the cold charging machine, the cold charging speed is fast; when both the first cold storage tube 221 and the second cold storage tube 222 are connected to the cold charging machine, the cold charging speed is even faster. In different usage scenarios, we choose to use a cold storage tube 22 with a different heat dissipation structure 25 for cold charging. Accordingly, the cold storage tube 22 connected to the heat dissipation structure 25 and with a large area of ​​the heat dissipation structure 25 has a fast cooling speed. Therefore, different cold storage tubes 22 or a combination thereof can be selectively used for cooling according to the temperature requirements of the storage chamber 14.

[0072] The second embodiment differs from the previous embodiment only in that the heat dissipation structure 25 includes a first heat dissipation structure 251 connected to the first cold storage tube 221 and a second heat dissipation structure 252 connected to the second cold storage tube 222, and the first heat dissipation structure 251 and the second heat dissipation structure 252 are different; therefore, the heat dissipation effects of the two are different.

[0073] Preferably, the area of ​​the first heat dissipation structure 251 is larger than that of the second heat dissipation structure 252 , so the heat exchange rate between the first cold storage tube 221 and the surrounding cold storage liquid is better than the heat exchange rate between the second cold storage tube 222 and the surrounding cold storage liquid.

[0074] The second heat dissipation structure 252 is similar to the first heat dissipation structure 251, and also includes a sleeve 253 sleeved on the second cold storage tube 222, a plurality of heat dissipation fins 254 connected to the sleeve 253, and at least one heat dissipation tube 255 connected to at least part of the heat dissipation fins 254. The position and proportion relationship between the sleeve 253 and the heat dissipation tube 255 are the same as those of the first heat dissipation structure 251, and will not be repeated here.

[0075] The area of ​​the heat sink 254 and / or heat pipe 255 of the first heat dissipation structure 251 is greater than the area of ​​the heat sink 254 and / or heat pipe 255 of the second heat dissipation structure 252. Optionally, the number of heat sinks 254 of the first heat dissipation structure 251 is greater than the number of heat sinks 254 of the second heat dissipation structure 252; or the first heat dissipation structure 251 includes two circles of heat pipe 255, and the second heat dissipation structure 252 includes one circle of heat pipe 255.

[0076] The cold storage assembly 2 also includes a cold charging pipe 26 and a cold return pipe 27 respectively connected to a pair of cold charging interfaces 23, and the cold storage assembly 2 also includes a first switch for connecting or disconnecting the first cold storage pipe 221 and the cold charging pipe 26, and a second switch for connecting or disconnecting the second cold storage pipe 222 and the cold charging pipe 26. Different cold storage pipes 22 can be selectively used for cold charging through the first switch and the second switch to adjust the cold charging speed and the cold charging time. The first switch and the second switch are mechanical switches or electronic switches.

[0077] Furthermore, the cold storage component 2 also includes at least one heat exchange chip 28, and the heat exchange chip 28 includes a plurality of first fluid channels and a plurality of second fluid channels that are alternately arranged. The first fluid channel is used to connect with the cold charging machine to circulate the low-temperature coolant; the second fluid channel is connected with the cold storage tank 21 to circulate the cold storage liquid.

[0078] The first fluid channel and the cold storage tube 22 are respectively connected to the cold charging machine through a pair of cold charging interfaces 23. Preferably, the first fluid channel and the cold storage tube 22 share the same pair of cold charging interfaces 23. The first fluid channel and the cold storage tube 22 are connected in parallel to the cold charging tube 26 and the cold return tube 27.

[0079] Specifically, the cold storage component 2 also includes a cold charging pipe 26 and a cold return pipe 27 respectively connected to a pair of cold charging interfaces 23, the cold storage pipe 22, the first fluid channel, and the heat exchanger 31 described below are connected in parallel between the cold charging pipe 26 and the cold return pipe 27, and the distance from the connection point of the first fluid channel and the cold charging pipe 26 to the cold charging interface 23 is smaller than the distance from the connection point of the heat exchanger 31 and the cold charging pipe 26 to the cold charging interface 23. Therefore, after starting the cooling pump 32, the refrigerant flows between the cold storage pipe 22 and the heat exchanger 31, and almost does not pass through the heat exchange chip 28.

[0080] The heat exchange chip 28 is composed of alternately arranged first fluid channel sheets and second fluid channel sheets, and the height of the first fluid channel and the second fluid channel is 0.05mm~0.5mm, preferably 0.75mm~0.1mm; the thickness of the first fluid channel sheet and the second fluid channel sheet is 0.05mm~0.5mm, preferably 0.75mm~0.1mm, and the cold storage liquid and the low-temperature coolant exchange heat through the thin wall, with good heat exchange performance, which can quickly cool the cold storage liquid.

[0081] The structure of the heat exchange chip 28 can refer to but is not limited to CN116222047A, CN115540650A, CN115540654A, CN115540642A, CN115540647A, etc. The cold storage liquid and the coolant exchange heat in the heat exchange chip 28. On the one hand, the heat exchange chip 28 has good heat exchange performance, which can quickly and greatly reduce the temperature of the cold storage liquid and increase the cooling speed; on the other hand, the low-temperature cold storage liquid flows into the cold storage tank 21, causing agitation of the cold storage liquid in the tank. Without adding a pump, the flow of the cold storage liquid is increased, and the cooling speed can also be increased.

[0082] In one embodiment, the cold storage component 2 also includes a first flow valve for controlling the flow of the coolant between the cold charging pipe 26 and the cold storage pipe 22, and a second flow valve for controlling the flow of the coolant between the cold charging pipe 26 and the first fluid channel, so as to realize intelligent control and adjust the flow through the first fluid channel and the cold storage pipe 22 as needed.

[0083] In another embodiment, there is no flow valve, and the connecting area S1 between the cold storage pipe 22 and the cold charging pipe 26 is larger than the connecting area S2 between the first fluid channel and the cold charging pipe 26. When charging cold, a large amount of coolant flows into the cold storage pipe 22, and the cold storage liquid is cooled by the cold storage pipe 22; a small amount of coolant flows into the heat exchange chip 28, and ice blockage is not easy to occur.

[0084] Preferably, the ratio of the area S1 to the area S2 is 1:0.01 to 1:0.3, so that the heat exchange chip 28 has a good heat exchange capacity and is not prone to ice blockage.

[0085] After adding the heat exchange chip 28, the cold storage speed is significantly improved, especially in the stage of reducing the cold storage liquid from room temperature to the freezing point, which can shorten the time by 10% to 40%. In the stage from the freezing point to the complete solidification of the cold storage liquid, the cold storage liquid achieves the effect of "water dripping into ice" after heat exchange in the heat exchange chip 28, which is conducive to the rapid formation of ice slurry by the cold storage liquid.

[0086] The second fluid channel is connected to the cold storage tank 21 through a pipeline and a cold charging pump, and the cold charging pump drives the cold storage liquid to flow in the cold storage tank 21 and the second fluid channel.

[0087] The cooling assembly 3 includes a heat exchanger 31 connected to the cold storage pipe 22, a cooling pump 32 driving the coolant to circulate in the heat exchanger 31 and the cold storage pipe 22, an air duct 33 connecting the heat exchanger 31 and the storage chamber 14, and at least one cold air blower 34 driving the cold air to flow from the heat exchanger 31 to the storage chamber 14. When the cooling pump 32 and the cold air blower 34 are started, the coolant is cooled after heat exchange with the cold storage liquid, and the low-temperature coolant flows to the heat exchanger 31 and exchanges heat with the air passing through the heat exchanger 31. The low-temperature air is blown into the storage chamber 14 through the air duct 33 to cool the goods. During the cooling process, the coolant is always sealed in the cold storage box 21, reducing the risk of leakage and deterioration.

[0088] The heat exchanger 31 includes a heat exchange tube and a heat dissipation fin 44. The two ports of the heat exchanger 31 are respectively connected to the cold charging tube 26 and the cold return tube 27. The cooling pump 32 is connected between the heat exchanger 31 and the cold charging tube 26. After starting the cooling pump 32, the coolant circulates between the cold storage tube 22 and the heat exchanger 31.

[0089] In the present invention, the heat exchanger 31 is integrated, with high material utilization and small space occupation. The heat exchanger 31 and the cold storage tank 21 are arranged along a first direction, and in a second direction perpendicular to the first direction, the width of the heat exchanger 31 is smaller than the width of the cold storage tank 21.

[0090] The heat exchanger 31 has a first end side 311 and a second end side 312 arranged along the second direction. The first end side 311 is flush with the cold storage tank 21, and an installation space is formed outside the second end side 312. The cold charging pipe 26, the cold return pipe 27, and the cold discharge pump 32 are all located in the installation space.

[0091] The cold storage assembly 2 and the heat exchanger 31 are both located at the bottom of the storage chamber 14. Along the air flow direction in the air duct 33, the air duct 33 includes an air outlet duct 331 located downstream of the heat exchanger 31 and a return air duct 33 located upstream of the heat exchanger 31. Specifically, the air outlet duct 331 extends in the up-down direction of the storage chamber 14, and the return air duct 33 includes a first return air duct 332 extending in the up-down direction of the storage chamber 14, and a second return air duct connecting the bottom of the first return air duct 332 and the bottom of the air outlet duct 331. The air outlet duct 331 and the first return air duct 332 are respectively arranged on two opposite sides of the storage chamber 14, and the air outlet duct 331 is located on the side where the heat exchanger 31 is located.

[0092] Specifically, the cooling component 3 also includes a pair of wind plates 330 located in the storage chamber 14, one wind plate 330 is located above the side where the heat exchanger 31 is located, and is formed with the inner wall of the storage chamber 14 to form the air outlet duct 331, and the other wind plate 330 is formed with the inner wall of the storage chamber 14 to form the first return air duct 332; cold air enters the storage chamber 14 from the side where the heat exchanger 31 is located, and returns to the heat exchanger 31 from the other side.

[0093] Preferably, the wind plate 330 is provided with a plurality of air outlets, and the air outlets are evenly arranged on the wind plate 330, or the air outlets on a pair of wind plates 330 are symmetrically arranged, so that the air outlet is uniform, so that the temperature in the entire storage room 14 is uniform.

[0094] In addition, a convex rib 141 extending in the up-down direction is provided on the inner wall of the storage chamber 14, and the convex rib 141 divides the outlet duct 331 and the first return duct 332 into a plurality of sub-ducts 333, and the cold air flows upward along the sub-ducts 333 and enters the storage chamber 14 from the top.

[0095] In addition, the width of the heat exchanger 31 is smaller than the width of the air outlet 331, and the center of the heat exchanger 31 in the width direction is located on one side of the center of the air outlet 331 in the width direction. Specifically, the heat exchanger 31 has a first end side 311 and a second end side 312 arranged along the width direction, the first end side 311 of the heat exchanger 31 is flush with the air outlet 331, and the second end side 312 is located between the center and the other side of the air outlet 331 in the width direction.

[0096] The air cooler 34 is located at the downstream side of the heat exchanger 31, and the air cooler 34 is symmetrically arranged relative to the center line of the width direction of the air outlet 331. That is, the heat exchanger 31 is offset in the width direction of the air outlet 331, which can reasonably utilize the space and leave enough installation space for other components. At the same time, the symmetrically arranged air coolers 34 ensure that the cold air evenly enters the entire air outlet 331, avoiding insufficient cold air on the side of the air outlet 331 far away from the air cooler 34, thereby ensuring that the cold air is evenly blown into the storage room 14.

[0097] Optionally, the cooling fan 34 and the heat exchanger 31 are spaced apart in the direction of the wind path, and it is only necessary to consider that the fan is symmetrically arranged in the width direction of the air outlet duct 331, which is simple to install.

[0098] Optionally, the air cooler 34 is integrated with the heat exchanger 31, and the center of the air cooler 34 is located on one side of the center of the heat exchanger 31, that is, the air cooler 34 is offset in the width direction of the heat exchanger 31; specifically, it is inclined toward the side of the air outlet 331 far from the center line of the heat exchanger 31, so that the cold air is blown to the side of the air outlet 331 that does not correspond to the heat exchanger 31, and the cold air can also enter the entire air outlet duct 331 evenly.

[0099] “The center of the cold air fan 34 ” means: when there is only one cold air fan 34 , the air outlet center of the cold air fan 34 is the center of the cold air fan 34 ; when there are two or more cold air fans 34 , the center of the line connecting the air outlet centers of all fans is the center of the cold air fan 34 .

[0100] The heat exchanger 31 has a first end side 311 and a second end side 312 arranged along the width direction. The first end side 311 of the heat exchanger 31 is flush with the air outlet 331 , and the center of the air cooler 34 is located between the center of the heat exchanger 31 and the second end side 312 .

[0101] In this embodiment, the cooling group includes two cooling fans 34 , one of which is located at the second end side 312 , and the other is located between the center of the heat exchanger 31 in the width direction and the first end side 311 .

[0102] Optionally, the air cooler 34 is integrated with the heat exchanger 31, and the air coolers 34 are evenly distributed in the width direction of the heat exchanger 31, and the central axis of at least one of the air coolers 34 is inclined toward one side in the width direction of the heat exchanger 31, specifically toward the side of the air outlet 331 far from the center line of the heat exchanger 31, so that the cold air is blown to the side of the air outlet 331 that does not correspond to the heat exchanger 31, and the cold air can also enter the entire air outlet 331 evenly.

[0103] The cooling assembly 3 includes at least two air coolers 34. The air cooler 34 close to the first end side 311 is not tilted, and the air cooler 34 close to the second end side 312 is tilted toward the second end side 312 so that wind can enter the entire air outlet duct 331 in a balanced manner.

[0104] Alternatively, the cooling assembly 3 includes at least two cooling fans 34 , and all cooling fans 34 are arranged at an angle, and the inclination angle of the cooling fans 34 gradually increases in the arrangement direction from the first end side 311 to the second end side 312 .

[0105] Furthermore, the cooling system further includes a refrigeration system 4, which includes at least a compressor 41, a condenser 42, a throttling element and an evaporator 43, and the evaporator 43 is also located in the air outlet 331. After the cold energy in the cold storage assembly 2 is released, the refrigeration system 4 and the air cooler 34 can be started to provide cold energy to the storage room 14 through the evaporator 43.

[0106] Optionally, along the air flow direction in the air duct 33, the evaporator tube is located on the downstream side of the heat exchanger 31, and the evaporator 43 is separately arranged from the heat exchanger 31 to prevent the refrigerant in the heat exchanger 31 from cooling and condensing when the refrigeration system 4 is running, and to prevent the refrigerant from consuming additional cooling capacity of the evaporator 43.

[0107] Optionally, the evaporator 43 is integrated with the heat exchanger 31, which is compact and does not occupy too much space. Preferably, the heat exchanger 31 and the evaporator 43 are connected together by heat dissipation fins 44. Whether the refrigeration system 4 provides cooling capacity or the cold storage component 2 provides cooling capacity, the area of ​​the heat dissipation fins 44 remains unchanged, and a good heat exchange effect can be maintained.

[0108] The heat exchanger 31 includes a straight tube for the heat exchanger 31 and a bent tube for the heat exchanger 31 connected to the straight tube for the heat exchanger 31, and the evaporator 43 includes a straight tube for the evaporator 43 and a bent tube for the evaporator 43 connected to the straight tube for the evaporator 43. The straight tubes for the heat exchanger 31 and the straight tubes for the evaporator 43 are alternately arranged, that is, the straight tubes for the heat exchanger 31 and the straight tubes for the evaporator 43 are interlaced together, so that both the heat exchanger 31 and the evaporator 43 can achieve uniform cooling.

[0109] The heat exchanger 31 is centrally arranged at the air inlet side of the heat exchanger 31 with straight tubes, and the evaporator 43 is centrally arranged at the air outlet side of the heat exchanger 31 with straight tubes; or the evaporator 43 is centrally arranged at the air inlet side of the heat exchanger 31 with straight tubes, and the heat exchanger 31 is centrally arranged at the air outlet side of the heat exchanger 31 with straight tubes.

[0110] Furthermore, a plurality of heat dissipation fins 44 are simultaneously passed through the straight tubes for the heat exchanger 31 and the straight tubes for the evaporator 43 , which simplifies the assembly process and can maintain a larger heat exchange area.

[0111] In addition, the number of straight tubes used in the heat exchanger 31 is not less than the number of straight tubes used in the evaporator 43, which increases the cooling speed of the cold storage component 2. Under the premise of meeting the cold charging conditions, the cold storage component 2 is used for cooling in a limited manner, which is highly economical and applicable. In special circumstances, the use of the evaporator 43 for cooling can also meet the preservation needs of fresh products.

[0112] Furthermore, the cold chain box 100 also includes an air conditioning system 5 to effectively regulate the air in the storage room. The air conditioning system 5 includes a humidification module. The humidification module includes a water storage pipe and an atomizer connected to the water storage pipe. The water storage pipe is connected to the cold storage tank for storing water. The atomizer atomizes the low-temperature water and passes it into the air duct 33, which will not cause the temperature in the storage room 14 to rise. The air conditioning system 5 also includes a negative ion module, an air freshening module, an ethylene decomposition module, etc. located in the air duct 33.

[0113] The control system controls the working states of the cooling system and the cooling release system to adapt to different cooling needs.

[0114] The power supply system 6 includes a rechargeable battery, which supplies power to electrical components that require power during use.

[0115] The cold chain box 100 of the utility model provides coldness for the goods and ensures the quality of fresh products. One box can be used for multiple purposes, for example, it can be used as a collection box at the place of production, and the fresh products picked and salvaged can be directly put into the cold chain to achieve immediate freshness lock; or it can be used as a fresh-keeping box or a LTL box in trunk line, short-distance and other transportation, and used as a turnover box in the distribution center to ensure that the fresh products are always in the cold chain from the place of production to the hands of merchants / users; or it can be used as a storage box in the hands of merchants to ensure the last kilometer and the last hour of freshness. Whether in the fields or in rivers, lakes and seas, fresh products are kept in the cold chain throughout the whole process and arrive at home fresh.

[0116] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0117] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A cold chain box, comprising a storage room, a cooling system for providing cooling to the storage room, and a power supply system for supplying power to the cooling system, characterized in that: The cooling system comprises: A cold storage component, the cold storage component comprising a cold storage tank for storing cold storage liquid, a cold storage pipe passing through the cold storage tank, and a pair of cold charging interfaces connected to the cold storage pipe; A refrigeration system, the refrigeration system comprising a compressor, a condenser, a throttling element and an evaporator; A cooling component includes a heat exchanger connected to the cold storage pipe, a cooling pump that drives the coolant to circulate in the heat exchanger and the cold storage pipe, an air duct connecting the heat exchanger and the storage room, and an air cooler located on one side of the heat exchanger, and the evaporator is located in the air duct.

2. The cold chain box according to claim 1, characterized in that: The evaporator and the heat exchanger are connected as a whole through heat dissipation fins.

3. The cold chain box according to claim 2, characterized in that: The heat exchanger includes straight tubes for the heat exchanger and bent tubes for the heat exchanger connected to the straight tubes for the heat exchanger, and the evaporator includes straight tubes for the evaporator and bent tubes for the evaporator connected to the straight tubes for the evaporator; the straight tubes for the heat exchanger are concentrated on the air inlet side of the heat exchanger, and the straight tubes for the evaporator are concentrated on the air outlet side of the heat exchanger; or the straight tubes for the evaporator are concentrated on the air inlet side of the heat exchanger, and the straight tubes for the heat exchanger are concentrated on the air outlet side of the heat exchanger.

4. The cold chain box according to claim 2, characterized in that: The heat exchanger includes straight tubes for heat exchanger and bent tubes for heat exchanger connected to the straight tubes for heat exchanger. The evaporator includes straight tubes for evaporator and bent tubes for evaporator connected to the straight tubes for evaporator. The straight tubes for heat exchanger and the straight tubes for evaporator are alternately arranged.

5. The cold chain box according to claim 3 or 4, characterized in that: A plurality of heat dissipation fins are simultaneously penetrated on the straight tube for the heat exchanger and the straight tube for the evaporator.

6. The cold chain box according to claim 3 or 4, characterized in that: The number of straight tubes for the heat exchanger is not less than the number of straight tubes for the evaporator.

7. The cold chain box according to claim 1, characterized in that: Along the air flow direction in the air duct, the evaporator is located downstream of the heat exchanger, and the evaporator and the heat exchanger are arranged separately.

8. The cold chain box according to claim 1, characterized in that: The cold storage assembly also includes a cold charging pipe and a cold return pipe respectively connected to a pair of cold charging interfaces; The cold storage component further includes at least one heat exchange chip, and the heat exchange chip includes a plurality of first fluid channels and a plurality of second fluid channels arranged alternately; the cold storage tube and the first fluid channel are connected in parallel between the cold charging tube and the cold return tube, and the cold storage component further includes a first flow valve for controlling the flow of the coolant between the cold charging tube and the cold storage tube, and a second flow valve for controlling the flow of the coolant between the cold charging tube and the first fluid channel; The second fluid channel is connected to the cold storage tank through a pipeline and a cold charging pump.

9. The cold chain box according to claim 1, characterized in that: The cold chain box also includes a power supply system for supplying power to the electrical components.

10. The cold chain box according to claim 9, characterized in that: The cold chain box includes an equipment room located below the storage room, and the equipment room includes a cold zone formed by an insulation layer and a hot zone connected to the outside of the cold chain box. The cold storage tank, the heat exchanger, and the air cooler are located in the cold zone, and the compressor, the condenser, and the power supply system are located in the hot zone.

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