CN217945941U - Movable preservation box and cold chain carrier with same - Google Patents

Abstract

The utility model provides a movable preservation box and a cold chain carrier with the same, wherein the movable preservation box comprises a storage box; the cold storage unit is internally provided with a cold storage medium; the cold supply unit is used for transmitting the cold energy of the cold storage medium to the storage box; the ventilation unit comprises a first open hole arranged at the front side of the storage box and a second open hole arranged at the rear side of the storage box. The utility model discloses a second that sets up the first uncovered mouth that is located the front side, rear side is uncovered the mouth, and in the transportation, fresh air is followed continuously in the first uncovered mouth gets into the storage tank, and follows the second is uncovered the mouth and is discharged for agricultural products such as fruit, vegetables are in a fresh gas environment all the time, and fresh-keeping effectual.

Description

Movable preservation box and cold chain carrier with same

Technical Field

The utility model relates to a portable fresh-keeping case and have its cold chain delivery vehicle.

Background

Cold chain transportation is one of the key factors for ensuring the fresh quality of agricultural products.

In the cold chain transportation of agricultural products, due to the respiration of fruits, vegetables and the like, air in the box body needs to be replaced in the transportation process. In the prior art, an air inlet window is usually arranged at the front part of a box body, the air inlet window is opened after ten-hour transportation, and air can quickly enter the box body in the transportation process. On one hand, the transportation is about ten hours, and the gas environment in the box body is poor; on the other hand, high-temperature gas passes through the box body, so that the temperature in the box body is increased, and chain breakage occurs in cold chain transportation.

In view of the above, there is a need for an improved mobile crisper and a cold chain carrier having the same to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable fresh-keeping case and have its cold chain delivery vehicle.

In order to solve one of the above technical problems, the utility model adopts the following technical scheme:

a movable preservation box comprises a storage box; the cold storage unit is internally provided with a cold storage medium; the cold supply unit transmits the cold energy of the cold storage medium to the storage box; the air exchange unit comprises a first open opening arranged at the front side of the storage box and a second open opening arranged at the rear side of the storage box.

Further, the first open mouth is configured to: under the moving speed of 60-90 km/h, the air intake per hour is 0.2-2 times of the volume of the movable preservation box, or the air intake per hour can replace the air in the box body for 0.3-5 turns.

Further, the area of the first open opening is smaller than or equal to the area of the second open opening.

Further, the storage tank includes by at least one division structure will a plurality of storing districts that the storage tank was cut apart into, be equipped with the ventilation hole on the separator.

Further, the vent hole in the partition adjacent to the first open opening is smaller than the vent hole in the partition adjacent to the second open opening.

Further, the cold storage unit is arranged in the storage box and located on the front side of the storage box, a communication opening for air circulation is formed between the storage box and the cold storage unit, and the first open opening is communicated with the cold storage unit; or, store up cold unit set up in the outer front side of storage tank, just store up and be equipped with the air inlet through-hole that supplies the air admission, the air-out through-hole that supplies the air outflow on the cold unit, the air-out through-hole with first opening intercommunication.

Further, the air enters from the first opening and enters the storage box after exchanging heat with at least part of the cooling unit.

Further, the air entering from the first opening enters the storage box after exchanging heat with the first transmission unit; and/or the air entering from the first opening enters the storage box after being subjected to heat exchange with the second transmission unit; and/or the air entering from the first opening enters the storage area of the storage box after exchanging heat with at least part of the heat exchanger.

Further, the movable fresh-keeping box also comprises a discharge unit for discharging liquid cold storage medium outwards, and the air entering from the first opening enters the storage box after heat exchange with the discharge unit.

Further, the air entering from the first opening port is heat-exchanged with at least a portion of the first discharge duct; and/or, air entering from the first opening port exchanges heat with at least a portion of the second discharge pipe.

A cold chain vehicle comprising a vehicle, a mobile crisper as described above located on the vehicle.

The utility model has the advantages that: the utility model discloses a second that sets up the first uncovered mouth that is located the front side, rear side is uncovered the mouth, and in the transportation, fresh air is followed continuously in the first uncovered mouth gets into the storage tank, and follows the second is uncovered the mouth and is discharged for agricultural products such as fruit, vegetables are in a fresh gas environment all the time, and fresh-keeping effectual.

Drawings

FIG. 1 is a perspective view of a mobile fresh keeping box according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of FIG. 1 at another angle, with a door omitted to show the internal structure;

FIG. 3 is a schematic view of the structure of FIG. 1 with the tank removed;

FIG. 4 is a schematic view of the structure of FIG. 3 at another angle;

FIG. 5 is a schematic view of FIG. 2 at another angle;

FIG. 6 is an enlarged view of a portion of FIG. 5;

FIG. 7 is a schematic structural view of the water tank of the present invention;

fig. 8 is a schematic structural view of a water tank according to another embodiment of the present invention;

FIG. 9 isbase:Sub>A cross-sectional view taken along A-A of FIG. 8;

fig. 10 is a schematic structural view of a water tank according to another embodiment of the present invention;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 12 is a schematic view showing the structure of a water tank according to another embodiment of the present invention;

fig. 13 is a schematic view of a heat exchanger body and a heat exchange fan in an embodiment of the present invention;

fig. 14 is a schematic view of a heat exchanger body and a heat exchange fan in another embodiment of the present invention;

fig. 15 is a schematic view of a heat exchanger body and a heat exchange fan in another embodiment of the present invention;

FIG. 16 is a schematic view of a heat exchanger installed in an embodiment of the present invention;

fig. 17 is a schematic diagram of a cold storage unit, a cold supply unit, and a discharge unit in an embodiment of the invention.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiment, and the structural, method, or functional changes made by those skilled in the art according to the embodiment are all included in the scope of the present invention.

Please refer to fig. 1 to 17, which illustrate a preferred embodiment of the mobile preservation box 100 of the present invention. The portable crisper 100, for cold chain transport, can pre-chill and/or preserve the goods.

The mobile fresh-keeping box 100 comprises a storage box 12, a cold demand unit 10, a cold storage unit 20, a cold demand unit 10, a cold supply unit 30, a discharge unit 40, a humidification unit 50 and an electric control unit 60. The mobile fresh-keeping box 100 may be an integral body, or may be formed by assembling independent modules.

The cold demand unit 10 includes any unit that requires refrigeration. The cold demand units 10 are integrated, or the cold demand units 10 comprise a plurality of sub cold demand units separated by at least one separation structure 11, the cold supply units transmit cold to each sub cold demand unit, and the cold supply to at least one sub cold demand unit is independently controlled, so that the block cold supply is realized, and the use scene is more flexible.

In the first class of embodiments, the cooling demand unit 10 includes a storage box 12, and at least one door 13 for opening or closing the storage box 12, and the storage box 12 is a thermal insulation box body. The storage box 12 is used for storing agricultural products, and the cold supply unit 30 provides cold energy for the storage box 12 to pre-cool and/or keep fresh the agricultural products.

Further, the sub-cooling units are a plurality of storage areas 14 formed by dividing the storage box 12 by at least one dividing structure 11. On one hand, after filling a storage area 14 with goods, the partition structure 11 corresponding to the storage area 14 can be closed, the cooling unit 30 is started to supply cooling to the storage area 14, and the goods in the storage area 14 are pre-cooled and/or kept fresh; the pre-cooling and/or the fresh-keeping are realized. On the other hand, during loading and unloading, the partition structure 11 can effectively prevent the cold energy of the storage area 14 which enters a precooling or refrigerating or freezing state from leaking, reduce energy consumption, and simultaneously can directly load goods from a goods source and directly transport the goods to a destination, thereby avoiding the intermediate transfer process of the traditional cold chain vehicle and greatly improving the transport efficiency.

In this embodiment, the partition structures 11 are disposed at intervals along the lengthwise direction of the storage box 12, and the partition structures 11 are disposed substantially parallel to the door 13. Several storage areas 14 are filled one by one starting from the storage area 14 farthest from the door body 13, and precooling of the goods in one storage area 14 is started when one storage area 14 is filled. Of course, in other embodiments, the door 13 may be disposed on the side of the storage compartment 12, such that the door 13 and the partition structure 11 are disposed vertically.

In one embodiment, the partition structure 11 is a flexible partition structure, which is simple and flexible and deformable, and is more suitable for use in a scene, such as a door curtain. In order to prevent the cold energy of the storage area 14 from leaking outwards, the length of the flexible dividing structure along the up-down direction is not less than the height of the storage box 12; the width of the flexible partition structure is not less than the width preferably larger than the width of the storage box 12, so that the upper side, the lower side, the left side and the right side of the flexible partition structure can be matched and sealed with the inner wall of the storage box 12 to reduce or seal the gap between the flexible partition structure and the storage box 12, and further the cold leakage amount is reduced.

Further, the flexible dividing structure is longer in length in the up-down direction, and when a large number of goods need to be put into the storage area 14, the top of the flexible dividing structure is inclined outward, so that the space of the storage area 14 can be temporarily increased. Preferably, the length of the flexible dividing structure in the vertical direction is less than or equal to 1.5 times of the height of the storage box 12, the flexible dividing structure is stacked at the bottom due to an excessively long length, which causes inconvenience in loading and unloading goods, and the amount of goods exceeds the volume of the expanded space, and the extra part should be placed in the next storage area. More preferably, the height of the storage case 12 is equal to or less than (1 + √ 2)/2 times, that is, the upper half of the flexible partitioning structure is inclined outward at 45 °.

For further reducing the risk of cold leakage, the left side and the right side of the flexible dividing structure can be fixed on the inner wall of the storage box 12 in a magic tape or magnetic tape mode. And flexible division structure below then need not to be fixed with 12 diapire of storage tank, and flexible division structure can guarantee to laminate to 12 diapalls of storage tank under self action of gravity.

In addition, the material of the partition structure 11 may be selected according to the type of goods stored in the storage area 14, so as to determine whether to adopt the heat insulation partition structure 11. If the desired temperature of the reservoir region 14 is low, for example 0 ℃ and below, the partition structure 11 is preferred. Also, when the kinds of goods in the adjacent storage areas 14 are the same or the required storage temperatures are similar, the partition structure 11 is not required, and the temperature equilibrium between the adjacent storage areas 14 can be rapidly achieved by heat exchange when the loading is completed. When the goods in adjacent storing area 14 are different, the corresponding preserving temperature is also different, and by adopting the separation structure 11, the heat transfer between the adjacent storing areas 14 can be effectively isolated, the temperature stability of each storing area 14 is ensured, and the multi-temperature-area goods storing function is realized.

Further, for automatic zoned cooling, the electronic control unit includes a sensor to detect whether the storage zone 14 is in a closed state. Specifically, the partition structure 11 has an open state for opening the storage area 14 and a closed state for closing the storage area 14, and the sensor includes a travel switch, a photosensor, a pressure sensor, and an infrared sensor for detecting whether the partition structure 11 is in the closed state.

In the second embodiment, the sub-cooling units are a plurality of storage boxes 12 arranged independently, each storage box 12 can be the storage box 12 in the first embodiment, and the interior of the storage box 12 can be partitioned or not partitioned.

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 tank 201, and the cold storage tank 201 is used to load a cold storage medium.

The cold storage box 201 is not limited in structure and shape, and is used to contain the cold storage medium and keep the temperature of the cold storage medium. The cold storage medium is used for storing a large amount of cold and providing the cold to the cold demand unit 10 through the cold supply unit 30.

The cold storage medium includes both a single-component cold storage medium such as water, alcohol, etc.; also included are multi-component cold storage media, such as salt water based mixtures, alcohol water based mixtures, salt-alcohol-water based mixtures. And a proper cold storage medium can be selected according to the required cold quantity and the temperature control range thereof.

In the present invention, the cold storage medium has a solid state and a liquid state. The solid state is more stable than the liquid state, including both the form stability of physical storage and the low entropy stability on energy, but the solid state is inconvenient to transport, and the liquid cold storage medium is convenient to transport to the cold demand unit 10 to directly provide cold for the cold demand unit. The solid cold storage medium absorbs a great deal of heat when the heat is absorbed and phase-changed into liquid, and a great deal of cold is released outwards.

The material of the cold storage tank 201 is not limited, but preferably a material which has high strength and is not easily corroded, such as a stainless steel tank, a PP tank, an ABS tank, or a glass steel tank.

The cold storage tank 201 includes a first receiving area 202 for receiving a solid and/or liquid cold storage medium, which melts into a liquid state after a certain period of time. Preferably, the cold storage box 201 further includes a second accommodating area 203 for accommodating the liquid cold storage medium, and a certain amount of the liquid cold storage medium is stored in the second accommodating area 203 to ensure that the cold demand unit 10 can be supplied with cold at any time.

In the first-type heat-storage tank 201, the second accommodation region 203 communicates with the first accommodation region 202, and a liquid-state heat-storage medium can flow between the first accommodation region 202 and the second accommodation region 203.

In the first case, the first accommodation area 202 and the second accommodation area 203 are two areas in one storage container, and the first accommodation area 202 is configured to collect liquid cold storage medium.

In a preferred class of embodiments, the cold box 201 includes a solid-liquid separation structure 204 that divides it into a first containment zone 202 and a second containment zone 203. The cold storage box 201 is a water tank, or when the water tank is arranged in the cold storage box 201, the solid-liquid separation structure 204 is positioned in the water tank.

The solid-liquid separation structure 204 is used to prevent the cold storage medium in a solid state from entering the second accommodation area 203. It will be understood by those skilled in the art that the solid-liquid separation structure may also be a filter screen located at the connection of the cooling supply unit 30 and the cold storage tank 201, and the filter screen may be fixed on the cold storage tank 201, or may be fixed on the end of the cooling supply unit 30, for example, on the end of the first transfer unit 31.

In the cold storage box 201 with the solid-liquid separation structure 204, the communication mode of the first accommodation area 202 and the second accommodation area 203 includes but is not limited to the following:

1) The solid-liquid separation structure 204 is provided with a communication port for communicating the first accommodation area 202 and the second accommodation area 203, and a liquid cold storage medium flows between the first accommodation area 202 and the second accommodation area 203.

In a specific embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged in a horizontal direction, the communication port 205 is disposed at the bottom of the solid-liquid separation structure 204, and according to the principle of a communicator, the heights of the liquid cold storage mediums in the first accommodating area 202 and the second accommodating area 203 are the same, so that the liquid cold storage medium in the first accommodating area 202 can rapidly flow into the second accommodating area 203.

In another specific embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged in a horizontal direction, the communication port 205 is disposed at the middle upper portion of the solid-liquid separation structure 204, and the liquid cold storage medium in the first accommodating area 202 flows into the second accommodating area 203 only when the height of the liquid cold storage medium reaches the communication port 205, so that the contact time between the liquid cold storage medium and the solid cold storage medium is long, and the heat exchange effect is good.

In another embodiment, the first containing area 202 and the second containing area 203 are arranged in the height direction, and the communication port is opened at any position on the solid-liquid separation structure 204. Preferably, the first receiving area 202 is located above the second receiving area 203, and the liquid refrigerant is introduced into the second receiving area 203 by gravity. Alternatively, the first receiving area 202 is located below the second receiving area 203, and in this case, the liquid cold storage medium needs to be pumped into the second receiving area 203 through a water pipe and a water pump.

2) In addition to providing the above-mentioned communication port in the solid-liquid separation structure 204 or not providing the above-mentioned communication port in the solid-liquid separation structure 204, the first accommodation region 202 and the second accommodation region 203 may be communicated with each other through a gap between an edge of the solid-liquid separation structure 204 and the heat storage box 201.

Taking the case where the first accommodation zone 202 and the second accommodation zone 203 are arranged in the horizontal direction, the first accommodation zone 202 and the second accommodation zone 203 communicate through a gap between the bottom edge or the side edge of the solid-liquid separation structure 204 and the cold storage box 201; alternatively, the solid-liquid separation structure 204 is lower in height than the heat-storage tank 201, and the first accommodation zone 202 and the second accommodation zone 203 communicate with each other above the solid-liquid separation structure 204, that is, the liquid cold-storage medium flows from the first accommodation zone 202 to the second accommodation zone 203 from above the solid-liquid separation structure 204.

In another preferred embodiment, the bottom of the cold storage box 201 is provided with a plurality of protruding support portions 206 integrally or separately arranged with the cold storage box, and a communication channel 208 for communicating the gaps 207 between the adjacent protruding support portions 206. The raised supporting portions 206 can strengthen the bottom of the cold storage box 201, and support the solid cold storage medium, the first accommodation area 202 is formed above the raised supporting portions 206, and the gaps 207 between the raised supporting portions 206 are communicated by the passages to form the second accommodation area 203. When the cold storage box 201 is a water tank, or a water tank is arranged in the cold storage box 201, the protrusion supporting portion 206 is located at the bottom of the water tank.

In one embodiment, the protrusion support 206 is a convex rib, the communication channel 208 is located at an end portion or a middle portion of the convex rib, and a gap 207 between adjacent convex ribs and the communication channel 208 together form the second accommodation region 203. In another embodiment, the protrusion supporting portions 206 are independently disposed bumps, and the gaps 207 between adjacent bumps are communicated with each other through the communication channel 208 to form the second receiving area 203.

In another preferred class of embodiments, the bottom of the cold box 201 has at least one depression, and a communication channel 208 communicating with the at least one depression, and above the depression is a first accommodation area 202, and the at least one depression and the communication channel 208 form the second accommodation area 203. The cold storage box 201 is a water tank, or when the water tank is arranged in the cold storage box 201, the depression is arranged at the bottom of the water tank; for example, the floor of the tank is wavy.

Further, the cold storage unit 20 further includes a cooling port 209 for adding at least the solid cold storage medium, and a cooling cover for opening or closing the cooling port 209. The cold adding port 209 is preferably arranged at the top or the side of the cold storage unit 20, so as to be convenient for fast loading of a solid cold carrying medium, fast storing of a large amount of cold and meeting the cold requirement of the agricultural product precooling process.

In an embodiment, the cold storage unit 20 of the present invention is described by taking water as the cold storage medium, and the cold storage medium is ice cubes in a solid state or water in a liquid state. Before cold chain transportation, enough ice blocks with stable shapes are added into the cold storage box 201 according to the required cold quantity, so as to realize quick cold storage; the temperature of the ice blocks is increased or melted into water after heat absorption, the water and the ice blocks are mixed to form an ice-water mixture, and the temperature of the water is lower than that of cold water at about 0 ℃; the cold supply unit 30 transmits cold water to the cold demand unit 10, the temperature of the cold water is increased after the cold water exchanges heat with the cold demand unit 10, and the cold water flows back to the cold storage tank 201 to exchange heat with ice blocks and/or ice water.

It should be noted that if the rapid cooling storage requires cooling of the cold demand unit 10, and the ice blocks do not melt into enough cold water, a part of water needs to be added into the cold storage tank 201 after the ice blocks are filled, and then the part of water is supplied to the cold demand unit 10, so that the return water with higher temperature exchanges heat with the ice blocks, and the water in the cold storage tank 201 will increase. If after rapid cold storage, a certain time is left before the precooling fresh-keeping box is carried to the destination and agricultural products are loaded, in the time period, a part of ice blocks can be melted into water to form an ice-water mixture, and cold water does not need to be added at the beginning.

Furthermore, the cold storage unit 20 is also provided with a holding structure 20a for holding the solid cold storage medium. The fixing structure 20a is a fixing frame for clamping the solid cold storage medium to prevent the solid cold storage medium from shaking and toppling over during transportation.

Specifically, the holding structure 20a is located in the first accommodating area 202, which can stabilize the solid state cold storage medium and prevent the solid state cold storage medium from directly impacting the cold storage box.

Or, a water tank with an upward opening is arranged in the cold storage tank 201, the fixing structure 20a is arranged outside the water tank, and part of the fixing structure 20a is higher than the water tank, so as to fix the solid cold storage medium above the water tank, and meanwhile, the strength of the water tank can be enhanced, and the water tank is prevented from cracking.

Or, a water tank with an upward opening is disposed in the cold storage tank 201, the fixing structure 20a is disposed above the water tank, which is equivalent to increase the wall of the water tank, so as to fix the solid cold storage medium above the water tank, and the sidewall of the water tank can stabilize the solid cold storage medium in the water tank.

Or, a water tank with an upward opening is arranged in the cold storage tank 201, the fixing structure 20a is located in the water tank, and part of the fixing structure 20a is higher than the water tank, so that the solid cold storage medium can be stabilized, and the solid cold storage medium is prevented from directly impacting the water tank.

Based on all the above embodiments, the holding structure 20a is preferably a grid frame, which can stabilize the solid state cold storage medium without obstructing the flow of the liquid state cold storage medium, and has light weight, material saving and small space occupation.

Further, the cold storage unit 20 further includes a buffer structure (not shown) located inside the wall of the cold storage box 201, so as to relieve the impact of the solid cold storage medium on the wall of the box. The buffer structure comprises at least one of a buffer cushion, a traction structure and an elastic structure.

In the second case, the first accommodation area 202 and the second accommodation area 203 are two storage containers, and are communicated with each other through a communication pipe. Preferably, an on-off valve or a liquid pump is disposed on the communicating pipe to drive the refrigerant to circulate between the first receiving area 202 and the second receiving area 203. The difference from the first type of cold storage box 201 mainly lies in the communication manner of the two accommodating areas, and the others are not described in detail.

The second type of cold storage box 201, the first accommodation region 202 and the second accommodation region 203 are independently arranged, and they are not communicated, and the cold storage medium in the first accommodation region 202 directly or indirectly provides cold energy for the cold storage medium in the second accommodation region 203. The difference from the first type of cold storage box 201 is mainly how the cold storage mediums in the two receiving areas conduct heat, and the others will not be described in detail.

In one embodiment, the second receiving area 203 is embedded in the first receiving area 202, or the first receiving area 202 is embedded in the second receiving area 203, or the second receiving area 203 is adjacent to the first receiving area 202, and heat is transferred therebetween by thermal radiation. Preferably, the partition wall between the two accommodation areas is a plate material with good heat conductivity, such as a metal wall.

In another embodiment, the cold storage unit 20 further includes a heat transfer structure, a portion of which is located in the first accommodation region 202, and another portion of which is located in the second accommodation region 203. The heat transfer structures include, but are not limited to, heat transfer rods, heat transfer fins, heat pipes, and the like.

In another embodiment, the cold storage unit 20 further comprises a bypass heat pipe in communication with the first accommodation region 202, a bypass pump connected to the bypass heat pipe, a portion of the bypass heat pipe being located in the second accommodation region 203; alternatively, the cold storage unit 20 further comprises a bypass heat pipe communicating with the second accommodation region 203, a bypass pump connected to the bypass heat pipe, and a part of the bypass heat pipe is located in the first accommodation region 202. When the bypass pump is started, the liquid cold storage medium flows in the bypass heat conduction pipe, and the cold energy of the cold storage medium in the first accommodation area 202 is transferred to the cold storage medium in the second accommodation area 203.

The second type of cold storage unit 20 is in a liquid state, and is convenient to provide cold energy to the cold demand unit 10 through the cold supply unit 30. The difference from the first type of cold storage unit 20 is only that the first accommodating area 202 and the second accommodating area 203 are the same accommodating area, and the description is omitted.

Based on above-mentioned cold unit 20 that stores up, the utility model also provides a store up cold system rapidly, add the cold-storage box 201 with solid-state cold storage medium fast, accomplished promptly and filled cold fast. Compared with the traditional method that the cold storage medium is changed into a solid state from a liquid state through a refrigerating unit or a cold filling machine, the cold filling speed is high, the cold filling amount in a short time is large, and the pre-cooling requirement of agricultural products can be met.

The cooling unit 30 is a medium for transferring the cooling energy stored in the cooling storage medium to the cooling demand unit 10.

The first type of cooling unit 30 is suitable for both types of cold storage units 20. The cooling unit 30 is used for transferring the liquid cold storage medium to the cooling unit 10 to directly provide the cooling capacity for the cooling unit.

The cooling unit 30 includes a heat exchanger 32 disposed at the cooling demand unit 10, a first transfer unit 31 transferring a liquid cooling storage medium to the heat exchanger 32, and a driving pump driving the transfer of the cooling storage medium. The cold storage medium exchanges heat with the cold-requiring unit 10 in the heat exchanger 32, is not in direct contact with the cold-requiring unit 10, is in soft heat transfer, and has no damage to the cold-requiring unit 10.

Preferably, the cooling unit 30 further includes a second transfer unit 33 transferring the cold storage medium from the heat exchanger 32 to the cold storage unit 20. The cold supply unit 30 transmits the liquid cold storage medium with lower temperature into the heat exchanger 32 through the first transmission unit 31, the temperature of the cold storage medium is increased after the cold storage medium exchanges heat with the cold demand unit 10 in the heat exchanger 32, and the cold storage medium returns to the cold storage unit 20 through the second transmission unit 33; meanwhile, the cooling unit 30 continues to transmit the liquid cooling medium with a lower temperature to the heat exchanger 32, so as to form a dynamic cycle, and continuously provide cooling capacity for the cooling unit 10.

The heat exchanger 32 may be a direct cooling type heat exchanger, and includes at least one heat exchanger body 321, where the heat exchanger body 321 includes a heat exchange tube, and preferably also includes a heat dissipation fin, so as to increase a heat exchange area.

The heat exchanger 32 includes at least two heat exchanger bodies 321, and the at least two heat exchanger bodies 321 are arranged along an up-down direction and/or a horizontal direction. When the cold energy is distributed along the up-and-down direction, the cold energy released on the whole surface is more uniform; when the cooling plates are arranged along the horizontal direction, the cooling plates can be conveniently supplied in a partition manner along the horizontal direction. For convenience, when describing the relationship between the heat exchange fan 322 and the heat exchanger body 321, at least two heat exchanger bodies 321 as a whole can be described as follows: the heat exchanger body 321 comprises at least two sub heat exchanger bodies 321 distributed along a horizontal direction and/or a vertical direction.

The heat exchanger 32 may also be added with a heat exchange fan 322 on the basis of a direct cooling type heat exchanger. When the cold demand unit 10 needs a large amount of cold, the heat exchange fan 322 is started to accelerate the heat exchange of the heat exchanger 32; at times of lesser cooling capacity required by the cold demand unit 10, the heat exchange fan 322 is not activated.

The utility model discloses in, according to heat transfer fan 322's effect is divided into two kinds with it:

firstly, the heat exchanger body 321 is located on the air outlet side or the air suction side of the heat exchange fan 322, the unit 10 to be cooled is located on the air outlet side of the heat exchange fan 322, and the heat exchange fan 322 is used for driving air at the unit 10 to be cooled to exchange heat with the heat exchanger body 321, so that an air-cooled heat exchanger is formed substantially, and the heat exchanger is suitable for the unit 10 to be cooled which is not blown by cold air.

Second, the purpose of the heat exchange fan 322 is only to: disturbing the air around the heat exchanger 32 accelerates its heat exchange with the heat exchanger 32, but it is undesirable that the cold air is blown toward the unit 10 to be cooled, and it is still essentially a direct cooling type heat exchanger.

Specifically, the heat exchanger body 321 is located in an air suction area or an air outlet area of the heat exchange fan 322, and the unit 10 to be cooled is located in a non-air outlet area of the heat exchange fan 322. The air passes through the heat exchanger 32, but does not blow to the unit 10 to be cooled, or a small amount of edge air blows to the unit 10 to be cooled, so that the cold air is prevented from directly blowing to the unit 10 to be cooled and causing damage to the unit.

In an embodiment, the heat exchange fan 322 is located between the heat exchanger body 321 and the cooling demand unit 10, and the heat exchanger body 321 is located on an 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 towards the right top, and the cooling demand unit 10 is located below the heat exchange fan 322.

In another embodiment, the heat exchanger body 321 has a first side and a second side distributed on two sides of the heat exchanger body 321 along a first direction, the cooling demand 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 unit 10 to be cooled is located below the heat exchanger body 321, the heat exchange fan 322 is located on one side of the heat exchanger body 321 in the horizontal direction, and the outlet of the heat exchange fan blows towards the heat exchanger body 321 horizontally, so that the cold air passing through the heat exchanger body 321 is prevented from directly blowing towards the lower side of the heat exchanger body 321, and the unit 10 to be cooled is prevented from being damaged.

Preferably, as shown in fig. 13 to 15, an air outlet centerline of the heat exchange fan 322 is inclined toward the second side. For example, the outlet air of the heat exchange fan 322 is blown obliquely upward to the heat exchanger body 321, so that the cold air passing through the heat exchanger body 321 is prevented from being directly blown to the lower part of the heat exchanger body 321, and the cold unit 10 is prevented from being damaged.

Preferably, the inclination angle a of the heat exchange fan 322 is greater than 0 ° and less than 90 °; preferably between 10 deg. and 80 deg., more preferably between 30 deg. and 60 deg., and more preferably between 40 deg. and 50 deg., the wind passes through most of the area of the heat exchanger body 321, but does not blow toward the cold demand unit 10.

Further, as shown in fig. 15, the heat exchanger 32 includes at least two heat exchange fans 322, and the at least two heat exchange fans 322 are respectively disposed on two sides of the heat exchanger body 321, which are oppositely disposed along the second direction. Blow to heat exchanger body 321 simultaneously from relative both sides, improved heat exchange efficiency, the wind of while two directions offsets each other to a certain extent, avoids the cold wind to blow to the first side of heat exchanger body 321.

Preferably, the air outlet centerline of the heat exchange fan 322 is inclined towards the second side, and the intersection point of the air outlet centerlines of the heat exchange fans 322 respectively disposed at two opposite sides of the heat exchanger body 321 is located on the heat exchanger body 321.

When the heat exchanger body 321 is positioned on the air outlet side of the heat exchange fans 322, and when the heat exchange fans 322 respectively arranged on the two sides are symmetrically arranged, the intersection points can be positioned in the heat exchanger body 321, and most areas of the heat exchanger body 321 can be blown with air; the intersection point may also be located on the second side of the heat exchanger body 321 beyond the heat exchanger body 321, and the wind is not blown to the partial area on the heat exchanger body 321.

The utility model discloses the people further research discovery: connecting lines of the heat exchange fans 322 respectively arranged at two sides of the heat exchanger body 321 are used as a base line, and the larger the inclination angle a of the heat exchange fans 322 is, the larger the distance between the intersection point and the base line is; and the larger the inclination angle a of the heat exchange fan 322 is, the less the wind blows to the unit 10 to be cooled, and the closer to direct cooling. Therefore, as shown in fig. 14, the central axis of the outlet air of the heat exchange fan 322 is offset from the center of the heat exchanger body 321 along the first side to the second side direction to the first side, and the offset distance is within 1 time of the width of the heat exchanger body 321 along the first direction. Preferably, when the heat exchanger body 321 is located on the air outlet side of the heat exchange fan 322, the heat exchange fan 322 is flush with the portion of the heat exchanger body 321 facing the first side along the central axis of the first direction. Taking the first side as the lower part of the heat exchanger body 321 and the second side as the upper part of the heat exchanger body 321 as an example, the heat exchange fan 322 is located at one side of the heat exchanger body 321 in the horizontal direction and is flush with the lower half part of the heat exchanger body 321.

Correspondingly, when the heat exchanger body 321 is located on the air suction side of the heat exchanger blower 322, the heat exchanger blower 322 is flush with the heat exchanger body 321 along the central axis of the first direction toward the second side, so that the wind passes through the heat exchanger body 321 as much as possible.

It should be noted that: the "cold demand unit 10" described above is a part actually receiving cold, for example, the cold demand unit 10 includes a storage box 12 and a door 13, a heat exchange region and a storage region 14 are provided in the storage box 12, the heat exchanger 32 is provided in the heat exchange region, and the storage region 14 and the goods located therein are the "cold demand unit" actually receiving cold.

Preferably, the heat transfer area is located above the storage area 14, the cooling energy is supplied from top to bottom, and the temperature of the whole storage area 14 is relatively uniform. Or, the heat exchange area is positioned at one side of the storage area 14 in the horizontal direction, so that the loading and unloading are not influenced. Or the heat exchanger 32 is positioned on one side of the storage box 12 far away from the door body 13, so that cold leakage is avoided. Or the heat exchanger 32 is positioned at one door body 13, so that the maintenance is convenient.

Further, when the heat exchanger 32 comprises at least one heat exchange fan 322, the heat exchange fan 322 is disposed on one side of the heat exchanger body 321 close to the door 13, and cold air is blown into the storage box 12 to avoid leakage of cold energy.

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 unit 10 requiring cooling, is also suitable for replacing the heat exchanger body 321 with a cold source such as a cold accumulation assembly, an evaporator of a refrigeration unit, and the like.

Preferably, the heat exchanger 32 is arranged at the top of the storage box 12, and the heat exchanger 32 is fixed on the top wall, the side wall or the bottom wall of the storage chamber 12 through a fixing structure; the fixing method includes but is not limited to the following methods:

the first fixing structure is directly fixed on the top wall of the storage box. The first fixing structure is a fixing nail which penetrates through the heat exchanger from the bottom of the heat exchanger upwards and is fixed on the top wall of the storage box 12. Or, the first fixing structure is a suspension structure fixed on the top wall of the storage box, and the heat exchanger is hung on the suspension structure.

The heat exchanger 32 is indirectly secured within the storage compartment by a second securing structure 324.

In one embodiment, the second fixing structure 324 includes a keel frame and a fixing frame for fixing the keel frame in the storage box. The keel frame comprises criss-cross supports, the bearing capacity is strong enough, and the heat exchanger is fixed on the keel frame. The fixing mode can be that the fixing nail is fixed on the keel or the heat exchanger is hung on the hanging structure of the keel frame.

In another embodiment, as shown in fig. 16, the second fixing structure 324 comprises at least one sliding frame 3241, and a fixing frame 3242 for fixing the sliding frame 3241, and the heat exchanger is supported on the sliding frame 3241, for example, the heat exchanger is pushed to a proper position from one end to the other end of the sliding frame 3241, so that the installation is easy, and a plurality of heat exchangers can be conveniently installed on the same group of sliding frames 3241.

In the two embodiments, the mobile fresh-keeping box comprises at least two cooling units, or the cooling units comprise at least two heat exchangers, that is, when a plurality of 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 keel frames or sliding frames 3241.

In the above two embodiments, the fixing rack 3242 is at least one hanging rack for fixing the keel frame or the sliding rack to the top wall of the storage box, or at least one side rack for fixing the keel frame or the sliding rack to the side wall of the storage box, or at least two supporting racks for fixing the keel frame or the sliding rack to the bottom wall of the storage box.

Preferably, the support frame is arranged close to the side wall of the storage box. In another preferred embodiment, the second fixing structure 324 includes at least two sliding frames spaced apart from each other, and each sliding frame is fixed by at least two fixing frames. And extend in the extending direction of the sliding rack, the fixed racks of the two sliding racks are aligned or arranged in a staggered manner.

It is also possible to refer to the first transfer unit 31 as a liquid feed pipe and the second transfer unit 33 as a liquid return pipe, and the liquid heat storage medium is circulated between the heat storage tank 201 and the heat exchanger 32 by the driving pump. The connection relationship of the first and second transfer units 31 and 33 and the cold storage unit 20 will be described with emphasis on the following.

The first type of cold storage unit 20 communicating with the first accommodation area 202 and the second accommodation area 203 is connected in the following manner: in a preferred embodiment, the first transfer unit 31 communicates with the second receiving area 203, ensuring that there is sufficient flow of the liquid cold storage medium to prevent the drive pump from idling into the air. The second transfer unit 33 is in communication with the first receiving area 202, and the returned high-temperature cold storage medium exchanges heat with the solid and/or liquid cold storage medium in the first receiving area 202.

Preferably, the return port of the second transfer unit 33 is located above the first accommodation area 202, and the returned cold storage medium enters the first accommodation area 202 from the top downward to be sufficiently heat-exchanged with the solid and/or liquid cold storage medium. Of course, the return opening of the second transfer unit 33 may also be located below and in the middle of the first accommodation area 202.

Further, the second transfer unit 33 includes a return pipe 331 located above the first accommodating area 202302, and a plurality of return ports are disposed on the return pipe 331. Preferably, the aperture of the return port increases and/or the arrangement density of the return port increases along the direction in which the return pipe 331 moves away from the heat exchanger 32 toward the heat exchanger 32. Wherein the density increase comprises an increase in the number of return ports, a decrease in the spacing of return ports, and the like. With this configuration, it is possible to uniformly introduce the returned cold storage medium into the cold storage tank 201, in direct opposition to the pressure change of the liquid cold storage medium in the return pipe 331.

Of course, the second transfer unit 33 may also communicate with the second accommodation area 203. Preferably, the connection between the second transmission unit 33 and the second accommodation area 203 is higher than the connection between the first transmission unit 31 and the second accommodation area 203.

The communication manner between the second transmission unit 33 and the second accommodating area 203 is the same as the communication manner between the second transmission unit 33 and the first accommodating area 202, and thus the detailed description thereof is omitted.

The second type of cold storage unit 20 not communicating with the first accommodation area 202 and the second accommodation area 203 is connected in the following manner: the first transmission unit 31 and the second transmission unit 33 are both communicated with the first accommodating area 202, and the communication manner is the same as that in the first embodiment, and will not be described herein again.

Based on the above description of the cooling units, one or more heat exchangers may be connected in series between each group of the first transfer unit 31 and the second transfer unit 33, and the heat exchangers 32 connected in series may supply cooling to one storage area or a plurality of different storage areas. In a preferred embodiment, each storage area 14 is independently controlled by a set of first and second transfer units and one or more heat exchangers connected thereto.

In the second type of cooling unit 30, the cooling unit 30 includes a circulation pipeline, a cooling medium flowing in the circulation pipeline, and a driving element for driving the cooling medium to flow in the circulation pipeline. When the cold transfer medium is in a liquid state, the driving element is a water pump; when the cold transfer medium is in a gaseous state, the driving element is a fan.

A part of the circulation line is arranged in heat conduction with the cold storage unit 20, for example, a part of the circulation line is located in the cold storage unit 20 and is in direct contact with the cold storage medium. Another part of the circulation line is arranged in heat-conducting relationship with the cold demand unit 10.

Further, the cooling unit 30 further includes a heat exchanger 32 connected to the circulation pipeline, and the heat exchanger 32 and the heat exchange manner with the cooling demand unit 10 refer to the first type cooling unit 30, which is not described herein again.

Preferably, the pre-cooling fresh-keeping box 100 at least comprises any two of the above cooling units 30, and can provide cooling capacity for the cooling units 10 through at least two cooling modes, so that the pre-cooling fresh-keeping box can adapt to different cooling units 10; on the other hand, at least two cooling units 30 can be switched on when the cooling units 10 require a large amount of cooling, and one of them can be selected preferentially to provide cooling when the cooling requirements of the cooling units 10 are not large.

The heat conduction setting and heat conduction connection means that: the two can be in direct or indirect heat exchange. Moreover, any of the above-mentioned cold storage units 20 can be used in combination with any of the above-mentioned cold supply units 30 to form a cold storage and supply system. Through the cold storage and supply system, a friendly low-temperature environment is provided for agricultural products such as fruits and the like, which is equivalent to storing the fruits in the environment in winter.

The utility model discloses an add solid-state cold-storage medium to storing up in the cold box 201 and realize storing up cold rapidly. After goods are added into the storage box 12, cold energy is rapidly supplied into the storage box 12 through the cold supply unit 30 to realize precooling; when the temperature of the cold storage tank is reduced to the refrigeration or freezing temperature, the pre-cooling stage is finished, and the cold supply unit 30 supplies cold energy in the second cold supply mode to enter the refrigeration or freezing stage. Wherein the cooling capacity of the pre-cooling stage is larger than that of the refrigerating or freezing stage.

Therefore, the utility model discloses a portable fresh-keeping case 100 can be transported through the car, as long as there is the way just can reach the agricultural product base, and is very near apart from the product to pick ground. And the precooling is realized through a large amount of cold energy stored by the cold storage unit 20, and the precooling process is not limited by whether a product base has a power supply or not and whether a cold charging machine exists or not, so that the precooling in the production place can be realized. Directly from the goods source ground shipment to directly transport the destination, avoided the middle turnover process in traditional cold chain car, greatly improved conveying efficiency.

After the agricultural products are picked, the agricultural products can enter the storage box 12 at the first time, the cold supply unit 30 is opened to enter a pre-cooling process after the goods are fully closed, the agricultural products do not need to be pulled to the refrigeration house for queuing for pre-cooling, boxing pre-cooling can be realized in an agricultural product base, freshness is locked in time, and the taste and the quality are guaranteed.

When the agricultural product temperature reduces to cold-stored or freezing temperature, can directly get into cold-stored or freezing stage through the mode of adjusting the confession cold, need not the transport promptly after the precooling and enter into cold-stored or freezing stage promptly, compare in traditional cold chain transportation, need not transport many times, reduce the damage that collision and extrusion to agricultural product caused.

The goods can enter the transportation process after being filled and closed, and the processes of precooling, freshness keeping and the like are carried out in the transportation process, so that the functions of loading, namely walking, vehicle-mounted precooling and on-the-way precooling are really realized, and therefore, the products are unloaded from the container loading to the destination and are only carried once, and the damage rate caused by the collision of the goods is greatly reduced; the goods are pre-cooled and refrigerated/frozen in the pre-cooling and fresh-keeping box and are in the refrigerating or freezing environment provided by the cold supply unit 30 in the whole process, so that the cold chain is ensured to be not broken in the whole process; this is neither possible nor possible in the cold transport at present.

The utility model discloses the people further research discovery: the cold storage unit 20 is used to contain a large amount of solid cold storage medium to meet the demand of pre-cooling the goods, but the part of the cold storage medium increases the transportation cost. In addition, in the cooling or cold supply process, the solid cold storage medium melts, the amount of the liquid cold storage medium is increased, and the liquid cold storage medium is easy to shake and escape in the transportation process. Therefore, the utility model discloses further set up discharge unit 40 and outwards discharge liquid cold-storage medium, on the one hand can reduce the disposable volume of adding solid cold-storage medium, discharge after it melts, add solid cold-storage medium again, also add solid cold-storage medium in batches, reduce cold-storage unit 20 volume or weight, increase the cargo capacity; on the other hand, even if the solid cold-filling medium is added at one time, the weight can be reduced and the transportation cost can be reduced by discharging the liquid cold-storage medium after the cold energy is released.

The discharge unit 40 is an optional unit, and can be closed or removed.

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

Specifically, the first discharge port 401 is opened in the cold storage box 201. When the liquid level of the liquid cold storage medium reaches the height of the first discharge port 401, it is automatically discharged to the outside. Preferably, the height difference between the first discharge port 401 and the bottom of the cold storage unit 20 is greater than or equal to 20 cm, preferably greater than or equal to 40 cm, preferably greater than or equal to 50 cm, preferably greater than or equal to 60 cm, preferably greater than or equal to 50 cm, preferably greater than or equal to 80 cm, preferably greater than or equal to 90 cm, preferably greater than or equal to 100 cm, so as to ensure that the cold storage unit 20 has enough liquid cold storage medium therein so as not to affect the circulating cooling.

Based on the above-described cold storage unit 20, the first discharge port 401 communicates with the first accommodation region 202, or the first discharge port 401 communicates with the second accommodation region 203.

Or, the discharging unit 40 further comprises a first discharging port 401' opened on the first conveying unit 31; alternatively, the discharge unit further comprises a first discharge pipe 402' connected to the first transfer unit 31. The first exhaust port 401 'and the first exhaust pipe 402' may also discharge the cold storage medium, which has released the cold, to the outside, or after the transportation is finished.

Further, the discharge unit 40 further includes a first discharge valve that opens or closes the first discharge port 401/401 'or the first discharge pipe 402/402'. By means of the first discharge valve, the discharge is made controllable in terms of time, space, temperature, etc. For example, the discharging may be performed during at least one of a pre-cooling, refrigerating or freezing stage, preferably after the pre-cooling is finished and before the cargo returns, so as to reduce the power consumption of the automobile. Or the waste water is discharged in the field in the wasteland, and the waste water is discharged in areas such as toll stations, urban areas and the like.

In another embodiment, the discharge unit further includes a second discharge port 403 opened on the second transfer unit 33, a second discharge valve opening or closing the second discharge port 403; or, the discharge unit further includes a second discharge pipe 404 connected to the second transfer unit 33, and a second discharge valve opening or closing the second discharge pipe 404.

The utility model discloses preferably follow second transmission unit 33 locates to discharge outward and stores up the cold medium, can avoid discharging again after the cold medium of storage that flows back and the solid-state cold medium heat exchange of storage, avoids cold volume loss.

Further, the discharge unit further includes a sensor for detecting the amount of the liquid refrigerant in the storage tank 12. When the amount of the liquid-state cold storage medium in the cold storage tank 201 reaches the maximum level, the second discharge valve is opened and the cold storage medium is discharged outward with full force. When the amount of the liquid cold storage medium in the cold storage tank 201 reaches the middle line, the second discharge valve is half opened, and a part of the cold storage medium flowing back is discharged outward and a part of the cold storage medium flowing back flows back into the cold storage unit 20, thereby preventing the liquid cold storage medium in the cold storage tank 201 from being rapidly reduced. When the amount of the liquid-state cold storage medium in the cold storage tank 201 reaches the minimum level, the second discharge valve is closed, and the cold storage medium is entirely returned to the cold storage unit 20.

In a preferred embodiment, the above two discharge units are included, and the discharge unit further 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 transfer unit 31, a second sensor for detecting the temperature of the cold storage medium in the second transfer unit 33 or the cold demand unit, and the second discharge valve is opened when the temperature of the cold storage medium detected by the first sensor is low; the temperature that first sensor measured is low, then opens first blow off valve, and the cold storage medium that the preferential temperature is high is got rid of, avoids cold volume extravagant.

In addition, for convenient equipment, the utility model discloses to store up cold unit 20 modularization setting and be called cold storage module, cold storage module includes any kind of cold storage unit 20 of the aforesaid, cold storage module still includes and is used for being connected with cooling unit 30 and flows out and the at least a set of cold interface end of letting out of backward flow with the liquid cold-storage medium of confession. In this case, the cooling unit includes a cooling connection end connected to the cooling connection end to transmit the cold of the cold storage medium to the cooling demand unit 10.

The cooling interface end for the liquid cooling storage medium to flow out is communicated with the first transmission unit 31, and the communication mode of the cooling storage unit and the cooling storage box 201 is the same as that of the first transmission unit 31 and the cooling storage box 201. The cold discharging interface end for the backflow of the liquid cold storage medium is communicated with the second transmission unit 33, and the communication mode of the cold discharging interface end and the cold storage tank 201 is the same as that of the second transmission unit 33 and the cold storage tank 201.

According to an integrated arrangement, the cold storage module may also comprise at least a part of the cooling unit 30, for example a return pipe 331 of the cooling unit 30 and a return opening provided thereon as part of the cold storage module.

The cold storage module may further include any one of the above-described discharge units 40.

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

The cooling units 30 correspond to the cooling demand units 10 one by one, and each cooling unit 30 provides cooling capacity for one or more corresponding cooling demand units 10.

The unit 10 includes a storage compartment 12, with one or more storage areas 14 within the storage compartment 12. In the spatial arrangement, all of the storage regions 14 are located on the same side of the cold storage unit 20; alternatively, the cold storage unit 20 is located in the middle of the at least one storage area 14.

For example, one storage compartment 12 may have multiple storage areas 14, with the cold storage unit 20 located on one side of the storage compartment 12 and all storage areas 14 on the same side, or the cold storage unit 20 may be located in the middle of the storage compartment 12 to provide cooling to the storage areas 14 on both sides. Or, for example, a plurality of storage bins 12 are arranged around the cold storage unit 20.

Further, the cooling port 209 is disposed on a wall of the cold storage unit 20 located in a portion of the storage box 12, or the cooling port 209 is disposed on a wall of the cold storage unit 20 adjacent to or shared by a portion of the storage box 12, at this time, the cooling port 209 is opened toward the inside of the storage box 12, so that unnecessary leakage of cold energy can be avoided, and a cold storage medium needs to be added to the cold storage unit 20 through the storage box 12. Alternatively, the cooling port 209 may be provided in a wall of the cooling unit 20 exposed to the outside of the portable fresh food container 100, and may be used to load and unload the contents of the storage container 12 and to supply the cooling medium in the middle of the process.

The utility model discloses a precooling-fresh-keeping case is when transporting agricultural products such as fruit, vegetables, because respiration such as fruit, vegetables, need replace the air in the storage tank 12 in the transportation. In the prior art, an air inlet window is usually arranged at the front part of the storage box 12, and the air inlet window is opened after about ten hours of transportation, so that air can quickly enter the storage box 12 in the transportation process. On one hand, the gas atmosphere in the storage box 12 is poor after about ten hours of transportation; on the other hand, the high temperature gas passing through the storage box 12 can raise the temperature in the storage box 12, and the cold chain transportation is broken.

In order to solve one of the problems, the precooling preservation box further comprises a ventilation assembly, wherein the ventilation assembly comprises a first open hole arranged at the front side of the storage box 12 of the precooling preservation box and a second open hole arranged at the rear side, and fresh air is continuously discharged from the first open hole into the storage box 12 and then discharged from the second open hole in the transportation process, so that agricultural products such as fruits, vegetables and the like are always in a fresh gas environment, and the preservation effect is good.

The amount of air entering the storage box 12 is controlled by controlling the area of the first open opening, so that the air entering the box is naturally discharged. The first open mouth is configured to: under the moving speed of 60-90 km/h, the air intake per hour is 0.2-2 times of the volume of the movable preservation box, or the air intake per hour can replace the air in the box body for 0.3-5 turns. For example, when the area of the first open hole is equivalent to a circle of the same area, the diameter is 1 to 3 cm. It will be appreciated by those skilled in the art that the more the cargo is loaded, the less the space is, and the more the air is displaced for the same area of the first open aperture.

Preferably, the area of the first open opening is smaller than that of the second open opening, so that air can enter the box body in a controlled manner and then be discharged outwards naturally.

Further, in the embodiment that the storage box 12 is divided into a plurality of storage areas 14 by a plurality of partition structures 11, the partition structures 11 are provided with ventilation holes. Preferably, the vent hole in the partition structure 11 near the first open mouth is smaller than the vent hole in the partition structure 11 near the second open mouth.

Preferably, still include with ventilation hole matched with occlusion part, the area of occlusion part is greater than the area in ventilation hole, and the occlusion part top is the stiff end, and all the other are free ends to when the shipment, the occlusion part can shelter from the ventilation hole under the action of gravity, reduces the risk that cold volume revealed from the ventilation hole. In the transportation process, the shielding part is blown up by wind, so that the air circulation is facilitated.

Furthermore, the high-temperature air is cooled firstly and then enters the storage area 14 of the storage box 12, so that temperature fluctuation in the box body can be avoided.

In one embodiment, the cold storage unit 20 is disposed at the front side in the storage box 12, a communication port for air circulation is formed between the storage box 12 and the cold storage unit 20, and the first open port is communicated with the cold storage unit 20. Air firstly passes through the cold storage box 201 after entering from the first opening, exchanges heat with cold storage medium, and then enters the storage box 12 behind after the temperature is reduced, so that the phenomenon that the temperature fluctuation in the storage box 12 is large is avoided.

In another embodiment, the cold storage unit 20 is disposed at the front side of the storage box 12, and the cold storage unit 20 is provided with an air inlet through hole for air to enter and an air outlet through hole for air to flow out, the air outlet through hole is communicated with the first opening, the air enters the cold storage unit 20 first, and the temperature is reduced and then enters the storage box 12 through the first opening.

In another embodiment, the incoming air exchanges heat with a portion of the cooling module and is cooled before entering the rear storage compartment 12, thereby avoiding greater temperature fluctuations within the storage compartment 12.

Specifically, the air entering from the first opening is disposed in heat exchange with the first transfer unit 31, and/or the air entering from the first opening is disposed in heat exchange with the second transfer unit 33; and/or, the air enters from the first opening and enters the storage area 14 of the storage bin 12 after exchanging heat with at least a portion of the heat exchanger 32.

Preferably, the ventilation assembly 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 opening exchanges heat with the fresh air heat exchanger.

In another embodiment, the air introduced from the first opening enters the storage compartment 12 after heat exchange with the discharge unit 40.

Specifically, the air entering from the first opening exchanges heat with at least a portion of the first discharge duct 402; and/or the air entering from the first opening exchanges heat with at least a portion of the second discharge duct 404.

Alternatively, the ventilation assembly includes a fresh air heat exchanger connected to the first exhaust pipe 402 or the second exhaust pipe 404, and the air entering from the first opening exchanges heat with the fresh air heat exchanger.

The fresh air heat exchanger at least comprises a heat exchange tube and a heat exchange fin.

The humidifying unit 50 is used to provide the appropriate humidity to the agricultural products, and is an unnecessary unit, and can be selectively removed or closed.

The humidifying unit 50 is preferably a non-heating humidifier, or an isothermal humidifier, such as an ultrasonic humidifier, a high-pressure pump jet humidifier, or the like. Other humidifiers may of course be used.

The humidifying unit comprises a humidifier 501 and a humidifying pipe 503 which is communicated with the humidifier 501 and discharges water vapor or water mist outwards, and the storage box 12 is humidified through the humidifying pipe 503.

Specifically, the humidifying pipe extends into the storage box 12, and at least one spray nozzle 504 is provided in each storage area 143 to humidify the corresponding storage area 143. Preferably, the spray heads are electrically controlled spray heads, and the humidification of each of the storage areas 143 can be individually controlled. Of course, a plurality of the humidifying pipes communicated with the humidifier can be arranged, each humidifying pipe humidifies one storage area, and the humidity control is more accurate.

Further, a water supply pipe 502, which is communicated with the water tank of the humidifier, supplies water thereto. Preferably, the cold storage medium is water, which is provided with low temperature water through the cold storage unit 20 or the cold supply unit 30, so as not to increase the temperature of the storage area 14 due to the humidification process.

In one embodiment, the other end of the water feeding pipe 502 is communicated with the cold storage unit 20, and specifically, the water feeding pipe 502 is communicated with the first accommodating area 202 or the second accommodating area 203.

In another embodiment, the water feeding pipe 502 is connected to the circulation pipeline of the cooling unit 30 through a tee joint to supply low-temperature water to the humidifier. For example, the other end of the water feeding pipe 502 communicates with the first transfer unit 31 or the second transfer unit 33.

In another embodiment, the other end of the water feeding pipe 502 is communicated with the discharging unit 10. Specifically, the other end of the water feed pipe 502 communicates with the first discharge port 401 or the first discharge pipe 402; or, the other end of the water adding pipe 502 is communicated with the second discharge port 403 or the second discharge pipe 404.

Or the water tank of the humidifier 501 is arranged in a heat exchange manner with the cold storage unit, and cold energy is obtained from the cold storage unit. Specifically, the water tank of the humidifier 501 may be embedded in the cold storage unit 20; or, the water tank of the humidifier 501 is disposed 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 driving the cold transfer medium to flow in the cold transfer pipe, wherein a portion of the cold transfer pipe is disposed in heat conduction with the cold storage unit 20, for example, a portion of the cold transfer pipe is located in the cold storage unit 20, and preferably directly contacts with the cold storage medium; another portion of the cold transfer tube is located within the water tank of the humidifier 501 or wound around the water tank of the humidifier 501.

Alternatively, the humidifying pipe 503 is disposed adjacent to the first transfer unit 31 or the heat exchanger 32 or the second transfer unit 33, and the temperature of the sprayed mist or moisture is low.

In addition, the humidifying unit 50 further includes an overflow pipe 505 communicated with the water tank of the humidifier 501, and the other end of the overflow pipe 505 is communicated with the cold storage unit 20, or the other end of the overflow pipe 505 is led out 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 tank. So set up, need not automatically controlled watering, the using electricity wisely, and the reliability is high. Of course, the water-adding pipe 502 may be provided with an electric valve to control whether to add water according to the water level of the humidifier water tank tested by a water level meter or the like.

Further, the humidifying unit 50 further comprises a humidity sensor located in the storage box 12, the humidifier and the humidity sensor are both in communication connection with the electronic control unit, and the electronic control unit controls the working state of the humidifying unit through the humidity obtained by the humidity sensor.

The utility model also provides a cold chain delivery vehicle, include the vehicle, be located the portable fresh-keeping case of an arbitrary above-mentioned on the vehicle. Including vehicles, boats, airplanes, and the like.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and 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 can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims (11)

1. A portable preservation box, its characterized in that includes:

a storage box;

the cold storage unit is internally provided with a cold storage medium;

the cold supply unit is used for transmitting the cold energy of the cold storage medium to the storage box;

the ventilation unit comprises a first open hole arranged at the front side of the storage box and a second open hole arranged at the rear side of the storage box.

2. A portable crisper as claimed in claim 1, wherein: the first open hole is configured to: under the moving speed of 60-90 km/h, the air intake per hour is 0.2-2 times of the volume of the movable preservation box, or the air intake per hour can replace the air in the box body for 0.3-5 turns.

3. A portable crisper as claimed in claim 1, wherein: the area of the first open opening is smaller than or equal to that of the second open opening.

4. A portable crisper as claimed in claim 1, wherein: the storage tank includes that to be split apart the structure by at least one will a plurality of storing districts that the storage tank was split apart into, it is equipped with the ventilation hole to split apart the structural.

5. A portable crisper as claimed in claim 4, wherein: the vent hole in the partition adjacent the first open opening is smaller than the vent hole in the partition adjacent the second open opening.

6. A portable crisper as claimed in claim 1, wherein: the cold storage unit is arranged in the storage box and positioned at the front side of the storage box, a communication port for air circulation is formed between the storage box and the cold storage unit, and the first open port is communicated with the cold storage unit;

or, store up cold unit set up in the outer front side of storage tank, just store up and be equipped with the air inlet through-hole that supplies the air admission, the air-out through-hole that supplies the air outflow on the cold unit, the air-out through-hole with first opening intercommunication.

7. A portable crisper as claimed in claim 1, wherein: air enters from the first opening and enters the storage box after exchanging heat with at least part of the cooling unit.

8. A portable crisper as claimed in claim 7, wherein: the cold supply unit comprises a heat exchanger arranged in the storage box, a first transmission unit for transmitting cold storage media in a second cold storage state from the cold storage unit to the heat exchanger, a second transmission unit for transmitting the cold storage media from the heat exchanger to the cold storage unit, and a driving pump for driving the transmission of the cold storage media, and air entering from the first opening enters the storage box after exchanging heat with the first transmission unit; and/or the air entering from the first opening enters the storage box after being subjected to heat exchange with the second transmission unit; and/or the air entering from the first opening port enters the storage area of the storage box after exchanging heat with at least part of the heat exchanger.

9. A portable crisper as claimed in claim 1, wherein: the movable preservation box also comprises a discharge unit which discharges liquid cold storage media outwards, and air entering from the first opening enters the storage box after heat exchange with the discharge unit.

10. A portable crisper as claimed in claim 9, wherein: the discharge unit further includes a discharge port communicating with the cold storage unit, a first discharge duct communicating with the discharge port, the air entering from the first opening port being heat-exchanged with at least a portion of the first discharge duct; and/or the cold supply unit comprises a heat exchanger arranged in the storage box, a first transmission unit for transmitting the cold-carrying medium from the cold storage unit to the heat exchanger, a second transmission unit for transmitting the cold-carrying medium from the heat exchanger to the cold storage unit, and a driving pump for driving the transmission of the cold-carrying medium; the discharge unit further includes a second discharge pipe connected to the first transfer unit or the second transfer unit through an electric valve, and the air introduced from the first opening is heat-exchanged with at least a portion of the second discharge pipe.

11. A cold chain vehicle, characterized by: comprising a vehicle, a mobile crisper according to any of claims 1 to 10 located on said vehicle.

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