CN115477076B

CN115477076B - Mobile fresh-keeping box and cold chain transportation vehicle having the same

Info

Publication number: CN115477076B
Application number: CN202110909143.4A
Authority: CN
Inventors: 彭显正; 陈金红
Original assignee: Zhejiang Xuebolan Technology Co Ltd
Current assignee: Zhejiang Xuebolan Technology Co Ltd
Priority date: 2021-05-31
Filing date: 2021-08-09
Publication date: 2025-06-03
Anticipated expiration: 2041-08-09
Also published as: CN115477076A

Abstract

The invention provides a movable fresh-keeping box and a cold chain carrier with the same, wherein the movable fresh-keeping box comprises a cold-requiring unit, a cold storage unit, a cold supply unit and an electric control unit, wherein the cold-requiring unit comprises a plurality of sub-cold-requiring units formed by at least one separation structure in a separated mode, liquid and/or solid cold storage media are arranged in the cold storage unit, the cold supply unit transmits the liquid cold storage media to each sub-cold-requiring unit and transmits the cold storage media subjected to heat exchange with the sub-cold-requiring units to the cold storage unit, and the electric control unit is in communication connection with the cold supply unit and provides the liquid cold storage media for at least one sub-cold-requiring unit to be independently controlled. The invention separates the sub-cooling units formed by the cooling units through the separation structure, and independently supplies cooling to at least one part of the sub-cooling units through the cooling units, thereby realizing the regional cooling and realizing more flexible use occasions.

Description

Movable fresh-keeping box and cold chain carrier with same

Technical Field

The invention relates to a movable fresh-keeping box and a cold chain carrier with the same.

Background

Cold chain transport is one of the key factors in ensuring the fresh quality of agricultural products.

The existing chain transportation, the refrigerator car supplies cold through the refrigerator unit, and cold air is blown into the whole box body through the evaporating fan, so that the refrigerator unit can be started only when the whole box body is filled with goods, and the goods which are firstly loaded into the box body are easy to break under the condition of low goods collecting speed.

In view of the foregoing, there is a need for an improved mobile fresh box and cold chain transporter.

Disclosure of Invention

The invention aims to provide a movable fresh-keeping box and a cold chain carrier with the same.

In order to solve one of the technical problems, the invention adopts the following technical scheme:

The movable fresh-keeping box comprises a cold-requiring unit, a cold storage unit, a cold supply unit and an electric control unit, wherein the cold-requiring unit comprises a plurality of sub cold-requiring units formed by at least one separation structure in a separated mode, liquid and/or solid cold storage media are arranged in the cold storage unit, the cold supply unit is used for transmitting the liquid cold storage media to each sub cold-requiring unit and transmitting the cold storage media subjected to heat exchange with the sub cold-requiring units to the cold storage unit, and the electric control unit is in communication connection with the cold supply unit and is used for providing the liquid cold storage media for at least one sub cold-requiring unit to be independently controlled.

Further, the cooling unit comprises a heat exchanger arranged at each sub-cooling unit, a first transmission unit for transmitting the liquid cold storage medium from the cold storage unit to the heat exchanger, a second transmission unit for transmitting the cold storage medium from the heat exchanger to the cold storage unit, and a driving pump for driving the cold storage medium to be transmitted, wherein at least one driving pump is independently controlled.

Further, the cooling-required units comprise storage units, and the sub-cooling-required units divide the storage units into a plurality of storage areas through at least one dividing structure; when the storage area is in a closed state, the electric control unit starts a driving pump corresponding to the heat exchanger positioned in the storage area. Further, the electronic control unit further comprises a sensor for detecting whether the storage area is in a closed state.

Further, the dividing structure comprises an opening state for opening the storage area and a closing state for closing the storage area, and the sensor comprises a travel switch, a photosensitive sensor, a pressure sensor and an infrared sensor for detecting whether the dividing structure is in the closing state.

The invention has the beneficial effects that the sub-cooling units formed by separating the cooling units are separated through the separating structure, and the cooling units are used for independently cooling at least one part of the sub-cooling units, so that the partition cooling is realized, and the use scene is more flexible.

Drawings

FIG. 1 is a perspective view of a mobile fresh 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 for illustrating the internal structure;

FIG. 3 is a schematic view of the structure of FIG. 1 with the housing 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 view of a structure of a water tank according to another embodiment of the present invention;

FIG. 9 is a cross-sectional view of FIG. 8 taken along the direction A-A;

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 of FIG. 10 taken along the B-B direction;

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

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

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

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

FIG. 16 is a schematic illustration of the installation of a heat exchanger in an embodiment of the invention;

fig. 17 is a schematic view of a cooling unit, and a discharging unit in an embodiment of the present invention.

Detailed Description

The present invention will be described in detail below with reference to embodiments shown in the drawings. The embodiment is not intended to limit the present invention, and structural, methodological, or functional modifications of the invention according to the embodiment are included in the scope of the invention.

Referring to fig. 1 to 17, a movable fresh-keeping box 100 according to a preferred embodiment of the invention is shown. The mobile fresh box 100 is used for cold chain transportation and can pre-cool and/or keep fresh the goods.

The movable fresh-keeping box 100 comprises a cooling unit 10, a cooling storage unit 20, a cooling unit 30, a discharging unit 40, a humidifying unit 50 and an electric control unit 60. The portable fresh-keeping box 100 may be a single unit or may be assembled from separate modules.

The cooling unit 10 includes any unit that requires cooling capacity. The cooling unit 10 is an integral unit, or the cooling unit 10 includes a plurality of sub-cooling units separated by at least one separation structure 11, the cooling unit transmits cooling capacity to each sub-cooling unit, and provides cooling capacity for at least one sub-cooling unit under independent control, so that block cooling is realized, and the use situation is more flexible.

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

Further, the sub-cooling-required unit is a plurality of storage areas 14 formed by dividing the storage box 12 through at least one dividing structure 11. On the one hand, after the goods are filled in the storage area 14, the partition structure 11 corresponding to the storage area 14 can be closed, the cooling unit 30 is started to cool the storage area 14, and the goods in the storage area 14 are pre-cooled and/or kept fresh, so that pre-cooling and/or keeping fresh before loading is realized. On the other hand, during loading and unloading, the separation structure 11 can effectively prevent the cold energy of the storage area 14 which enters a pre-cooling state or a refrigerating state or a freezing state from leaking, reduce energy consumption, simultaneously can directly load from a goods source and directly transport to a destination, avoid the middle turnover process of the traditional cold chain vehicle, and greatly improve transportation efficiency.

In the present embodiment, the plurality of separating structures 11 are disposed at intervals along the longitudinal direction of the storage box 12, and the separating structures 11 are disposed substantially parallel to the door 13. The storage areas 14 farthest from the door 13 are filled one by one, and the filling of one storage area 14 starts pre-cooling the goods in one storage area 14. Of course, in other embodiments, the door 13 may be disposed on a side of the storage box 12, so that the door 13 and the partition structure 11 are disposed vertically.

In one embodiment, the separation structure 11 is a flexible separation structure, which is simple in arrangement and flexible and deformable, and is better in use, such as a door curtain. In order to avoid the outward leakage of the cold energy of the storage area 14, the length of the flexible dividing structure along the up-down direction is not smaller than the height of the storage box 12, and the width of the flexible dividing structure is not smaller 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 dividing structure can be matched and sealed with the inner wall of the storage box 12 to reduce or seal the gap between the flexible dividing structure and the storage box 12, and further reduce the cold energy leakage.

Further, the length of the flexible dividing structure along the up-down direction is longer, and when more goods need to be put into the storage area 14, the top of the flexible dividing structure is inclined outwards, so that the space of the storage area 14 can be temporarily increased. Preferably, the length of the flexible dividing structure in the up-down direction is 1.5 times or less of the height of the storage box 12, and too long of the flexible dividing structure can be stacked at the bottom, which brings inconvenience to loading and unloading, and the amount of the goods exceeds the volume of the expanded space, so that more parts can be put into the next storage area. More preferably, it is (1 +.v 2)/2 times less than or equal to the height of the storage case 12, i.e., the upper half of the flexible dividing structure is inclined outwardly at 45 °.

In order to further reduce the risk of cold leakage, the left and right sides of the flexible dividing structure may be fixed to the inner wall of the storage box 12 by using a hook and loop or magnetic tape. The lower part of the flexible dividing structure is not required to be fixed with the bottom wall of the storage box 12, and the flexible dividing structure can be guaranteed to be attached to the bottom wall of the storage box 12 under the action of self gravity.

In addition, the material of the partition structure 11 may be selected according to the type of the goods stored in the storage area 14, and whether a thermal insulation partition structure is adopted. If the temperature required for the storage area 14 is low, for example 0 ℃ and below, the partition structure 11 is preferred. And, when the kinds of goods in the adjacent storage areas 14 are the same or the required preservation temperatures are similar, the partition structure 11 is not required, and when the loading is completed, the temperature balance between the adjacent storage areas 14 can be quickly realized by means of heat exchange. When the goods in the adjacent storage areas 14 are different, the corresponding preservation temperatures are also different, and the separation structure 11 is adopted, so that heat transfer between the adjacent storage areas 14 can be effectively isolated, the temperature stability of each storage area 14 is ensured, and the multi-temperature-area goods storage function is realized.

Further, for automated zoning cooling, the electronic control unit comprises 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 photosensitive sensor, 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 that are independently arranged, and each storage box 12 may be a storage box 12 in the first embodiment, and the interior of the storage box may be partitioned or not partitioned.

The cold storage unit 20 is a cold store of the portable fresh 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 tank 201 is not limited in structure and shape, and is used for accommodating the cold storage medium and performing a heat preservation function on the cold storage medium. The cold storage medium is used for storing a large amount of cold and supplying cold to the cold-requiring unit 10 through the cold-supplying unit 30.

The cold storage medium includes both single component cold storage media such as water, alcohol, etc., and multi-component cold storage media such as brine-based mixtures, alcohol-based mixtures, salt-alcohol-based mixtures. The 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, which includes both the morphological stability of physical storage and the low entropy stability in energy, but the solid state is inconvenient to be transported, and the liquid state cold storage medium is convenient to be transported to the position of the cold requiring unit 10 to directly provide cold energy for the cold requiring unit. The solid-state storage Leng Jiezhi absorbs a large amount of heat when absorbing heat and changing phase into liquid, namely, releases a large amount of cold outwards.

The material of the cold storage tank 201 is not limited, but a material having high strength and being not easily corroded, such as a stainless steel tank, a PP tank, an ABS tank, or a glass fiber reinforced plastic tank, is preferable.

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

In the first type of cold storage tank 201, the second receiving area 203 is in communication with the first receiving area 202, and a liquid cold storage medium can flow between the first receiving area 202 and the second receiving area 203.

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

In a preferred class of embodiments, the cold box 201 includes a solid-liquid separation structure 204 dividing it into a first containment region 202 and a second containment region 203. When the cold storage tank 201 is a water tank, or the water tank is disposed in the cold storage tank 201, the solid-liquid separation structure 204 is disposed in the water tank.

The solid-liquid separation structure 204 is used to prevent the solid cold storage medium from entering the second accommodating area 203. It will be appreciated by those skilled in the art that the solid-liquid separation structure may be a filter screen located at the junction of the cooling unit 30 and the cold storage tank 201, and the filter screen may be fixed to the cold storage tank 201 or may be fixed to an end of the cooling unit 30, for example, fixed to an end of the first transmission unit 31.

In the cold box 201 with the solid-liquid separation structure 204, the first accommodating area 202 and the second accommodating area 203 are communicated in the following ways, but not limited to the following ways:

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

In a specific embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged along a horizontal direction, the communication port 205 is disposed at the bottom of the solid-liquid separation structure 204, according to the principle of a communicating vessel, the heights of the first accommodating area 202 and the liquid cold storage medium in the second accommodating area 203 are consistent, and the liquid cold storage medium in the first accommodating area 202 can quickly flow into the second accommodating area 203.

In another embodiment, the first accommodating area 202 and the second accommodating area 203 are arranged along a horizontal direction, the communication port 205 is disposed at an upper middle 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 accommodating area 202 and the second accommodating area 203 are arranged along the height direction, and the communication port is opened at any position on the solid-liquid separation structure 204. Preferably, the first accommodating area 202 is located above the second accommodating area 203, and the liquid cold storage medium flows into the second accommodating area 203 under the action of gravity. Alternatively, the first accommodating area 202 is located below the second accommodating area 203, and the liquid cold storage medium needs to be pumped into the second accommodating area 203 through a water pipe and a water pump.

2) On the basis that the solid-liquid separation structure 204 is provided with the communication port or the solid-liquid separation structure 204 is not provided with the communication port, the first accommodating area 202 and the second accommodating area 203 can also be communicated with the gap between the cold storage tank 201 through the edge of the solid-liquid separation structure 204.

Taking the first accommodating area 202 and the second accommodating area 203 as examples, the first accommodating area 202 and the second accommodating area 203 are arranged along the horizontal direction, the first accommodating area 202 and the second accommodating area 203 are communicated with the cold storage tank 201 through gaps between the bottom edge or the side edge of the solid-liquid separation structure 204, or the height of the solid-liquid separation structure 204 is lower than the height of the cold storage tank 201, and the first accommodating area 202 and the second accommodating area 203 are communicated through the upper part of the solid-liquid separation structure 204, namely, the liquid cold storage medium flows into the second accommodating area 203 from the upper part of the solid-liquid separation structure 204 in the first accommodating area 202.

In another preferred embodiment, the bottom of the cold storage tank 201 is provided with a plurality of protruding supporting portions 206 integrally or separately arranged with the cold storage tank, and a communication channel 208 communicating with a gap 207 between adjacent protruding supporting portions 206. The protruding support portions 206 can strengthen the bottom of the cold storage tank 201, and support a solid cold storage medium, the first accommodating area 202 is formed above the protruding support portions 206, and the second accommodating area 203 is formed by communicating the channels with gaps 207 between the protruding support portions 206. When the cold storage tank 201 is a water tank, or the water tank is disposed in the cold storage tank 201, the protruding support portion 206 is located at the bottom of the water tank.

In one embodiment, the protruding support 206 is a protruding rib, the communication channel 208 is located at an end portion or a middle portion of the protruding rib, and the gap 207 between adjacent protruding ribs and the communication channel 208 together form the second accommodating area 203. In another embodiment, the protruding support portions 206 are protruding blocks that are independently provided, and the gaps 207 between adjacent protruding blocks are mutually communicated through the communication channels 208 to form the second accommodating area 203.

In another preferred embodiment, the bottom of the cold storage tank 201 has at least one depression, and a communication channel 208 communicating with the at least one depression, and the first accommodating area 202 is above the depression, and the second accommodating area 203 is formed by at least one depression and the communication channel 208. When the cold storage tank 201 is a water tank or the water tank is disposed in the cold storage tank 201, the depression is disposed at the bottom of the water tank, for example, the bottom plate of the water tank is in a wave shape.

Further, the cooling unit 20 further includes a cooling port 209 for adding at least a solid cooling medium, and a cooling cover for opening or closing the cooling port 209. The refrigeration port 209 is preferably disposed at the top or side of the cold storage unit 20 to facilitate rapid loading of the solid cold storage medium, rapid storage of a large amount of cold, and meeting the cold demand of the agricultural product pre-cooling process.

In one embodiment, the cold storage unit 20 of the present invention will be described using water as the cold storage medium, which is ice cubes in the solid state and water in the liquid state. Before cold chain transportation, a sufficient amount of ice cubes with stable forms are added into the cold storage tank 201 according to the required cold quantity to realize rapid cold storage, the temperature of the ice cubes rises or melts into water after heat absorption, the water and the ice cubes are mixed to form cold water with the temperature of about 0 DEG, at the moment, the cold water is transmitted to the unit 10 to be cooled by the cold supply unit 30, the temperature of the cold water rises after heat exchange with the unit 10 to be cooled, and then the cold water flows back to the cold storage tank 201 to exchange heat with the ice cubes and/or the ice water.

It should be noted that if the cooling unit 10 needs to be cooled after rapid cooling, and the ice cubes are not melted into enough cold water, a part of water needs to be added into the cooling tank 201 after the ice cubes are filled, and then the part of water is supplied to the cooling unit 10, so that the water in the cooling tank 201 is more and more in water after the high temperature is subjected to heat exchange with the ice cubes. If the quick cooling is performed, a certain time is left until the precooling fresh-keeping box is carried to a destination for loading agricultural products, and a part of ice cubes can be melted into water to form an ice-water mixture in the time period, the cold water is not needed to be added at the beginning.

Further, the cold storage unit 20 is further provided with a holding structure 20a for holding a solid cold storage medium. The holding structure 20a is a stable frame for clamping the solid cold storage medium, and preventing the solid cold storage medium from shaking and toppling during transportation.

Specifically, the retaining structure 20a is located in the first accommodating area 202, so as to not only stabilize the solid cold storage medium, but also prevent the solid cold storage medium from directly striking the cold storage tank.

Or, the cold storage tank 201 is internally provided with a water tank with an upward opening, the fixing structure 20a is arranged at the outer side of the water tank, and part of the fixing structure 20a is higher than the water tank, so that the solid cold storage medium above the water tank is fixed, and meanwhile, the strength of the water tank can be enhanced, and the cracking of the water tank can be avoided.

Or, the cold storage tank 201 is provided with an upwardly open water tank, the holding structure 20a is disposed above the water tank, which is equivalent to heightening the wall of the water tank, so as to fix the solid cold storage medium above the water tank, and the side wall of the water tank can stabilize the solid cold storage medium in the water tank.

Or, the cold storage tank 201 is provided with a water tank with an upward opening, the holding structure 20a is located in the water tank, and part of the holding 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 striking the water tank.

Based on all the above embodiments, the holding structure 20a is preferably a grid frame, which can stabilize the solid cold storage medium, and does not obstruct the flow of the liquid cold storage medium, and has light weight, material saving, and small occupied space.

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

In the second case, the first accommodating area 202 and the second accommodating area 203 are two storage containers, which are communicated through a communicating pipe. Preferably, the communicating pipe is provided with an on-off valve or a liquid pump to drive the refrigerant storage medium to circulate between the first accommodating area 202 and the second accommodating area 203. The difference from the first type of cold storage tank 201 is mainly that the two accommodation areas are communicated, and other details are not described.

The second type of cold storage tank 201, the first accommodating area 202 and the second accommodating area 203 are independently arranged, and are not communicated, and the cold storage medium in the first accommodating area 202 directly or indirectly provides cold to the storage Leng Jiezhi in the second accommodating area 203. The difference from the first type of cold storage tank 201 is mainly how the cold storage medium in the two receiving areas conducts heat, and the other is not described again.

In an embodiment, the second accommodating area 203 is embedded in the first accommodating area 202, or the first accommodating area 202 is embedded in the second accommodating area 203, or the second accommodating area 203 is disposed adjacent to the first accommodating area 202, and heat is transferred between the two by heat radiation. Preferably, the partition wall between the two accommodation areas is a plate material with good heat conduction performance such as a metal wall.

In another embodiment, the cold storage unit 20 further comprises a heat transfer structure, a portion of which is located in the first receiving area 202, and another portion of which is located in the second receiving area 203. Including but not limited to heat transfer bars, heat transfer sheets, heat pipes, and the like.

In another embodiment, the cold storage unit 20 further includes a bypass heat pipe in communication with the first accommodating area 202, and a bypass pump connected to the bypass heat pipe, wherein a portion of the bypass heat pipe is located in the second accommodating area 203, or the cold storage unit 20 further includes a bypass heat pipe in communication with the second accommodating area 203, and a bypass pump connected to the bypass heat pipe, and a portion of the bypass heat pipe is located in the first accommodating area 202. When the bypass pump is started, the liquid cold storage medium flows in the bypass heat transfer pipe, and the cold energy of the cold storage medium in the first accommodating area 202 is transferred to the cold storage medium in the second accommodating area 203.

The second type of cold storage unit 20 is added with the cold storage medium in a liquid state, so that cold is conveniently provided to the cold demand unit 10 through the cold supply unit 30. The difference from the first type of cooling unit 20 is that the first accommodating area 202 and the second accommodating area 203 are the same accommodating area, and the other parts will not be described again.

Based on the above-mentioned cold storage unit 20, the present invention further provides a rapid cold storage system, in which a solid cold storage medium is rapidly added into the cold storage tank 201, thereby completing rapid cold charging. Compared with the traditional method that the cold storage medium is changed from a liquid state to a solid state through a refrigerating unit or a cold filling machine, the cold filling speed is high, the cold filling amount is large in a short time, and the pre-cooling requirement of agricultural products can be met.

The cooling unit 30 is a medium for transferring the cooling capacity stored in the cooling medium to the cooling-requiring unit 10.

The first type of cooling unit 30 is suitable for both types of cooling units 20. The cooling unit 30 is configured to transfer the liquid cooling medium to the cooling unit 10 to directly provide cooling energy to the cooling unit.

The cooling unit 30 includes a heat exchanger 32 provided at the cooling-requiring unit 10, a first transfer unit 31 transferring a liquid-state cooling medium to the heat exchanger 32, and a driving pump driving the cooling medium to be transferred. The heat-storage medium exchanges heat with the cooling unit 10 in the heat exchanger 32, and is not in direct contact with the cooling unit 10, so that the cooling unit 10 is not damaged due to soft heat transfer.

Preferably, the cooling unit 30 further includes a second transfer unit 33 transferring the cooling medium from the heat exchanger 32 to the cooling unit 20. The cooling unit 30 transmits the liquid cooling medium with low temperature to the heat exchanger 32 through the first transmission unit 31, the temperature of the cooling medium rises after heat exchange with the cooling unit 10 in the heat exchanger 32, and the cooling medium returns to the cooling unit 20 through the second transmission unit 33, meanwhile, the cooling unit 30 continuously transmits the liquid cooling medium with low temperature to the heat exchanger 32, so as to form a dynamic circulation, and the cooling capacity is continuously provided for the cooling unit 10.

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

The heat exchanger 32 includes at least two heat exchanger bodies 321, and at least two heat exchanger bodies 321 are arranged in the up-down direction and/or the horizontal direction. The cooling capacity released on the whole surface is uniform when the cooling device is arranged along the up-down direction, and the cooling device is convenient for partition cooling along the horizontal direction when the cooling device is arranged along the horizontal direction. For convenience, when describing the relationship between the heat exchange fan 322 and the heat exchanger bodies 321, at least two heat exchanger bodies 321 as a whole may be described as the heat exchanger body 321 includes at least two sub heat exchanger bodies 321 distributed in a horizontal direction and/or a vertical direction.

The heat exchanger 32 may also be added with a heat exchange fan 322 based on a direct cooling heat exchanger. When the cooling unit 10 needs a large amount of cooling capacity, the heat exchange fan 322 is started to accelerate heat exchange of the heat exchanger 32, and when the cooling unit 10 needs a small amount of cooling capacity, the heat exchange fan 322 is not started.

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

first, the heat exchanger body 321 is located at the air outlet side or the air suction side of the heat exchange fan 322, the cooling unit 10 is located at the air outlet side of the heat exchange fan 322, and the purpose of the heat exchange fan 322 is to drive the air at the cooling unit 10 to exchange heat with the heat exchanger body 321, thereby forming an air-cooled heat exchanger substantially, and the air-cooled heat exchanger is suitable for the cooling unit 10 which does not feel cold.

Second, the heat exchange fan 322 is only used for disturbing the air around the heat exchanger 32 to accelerate the heat exchange with the heat exchanger 32, but it is not desirable that the cold air is blown to the cooling unit 10, and the heat exchanger is still a direct cooling type.

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 cooling unit 10 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 cooling unit 10, or a small amount of edge air blows to the cooling unit 10, avoiding damage to the cooling unit 10 caused by direct blowing of cold air to the cooling unit.

In an embodiment, the heat exchange fan 322 is located between the heat exchanger body 321 and the cooling unit 10, and the heat exchanger body 321 is located at the air outlet side of the heat exchange fan 322. For example, the heat exchange fan 322 is arranged below the heat exchanger body 321 and blows directly above, and the cooling unit 10 is arranged below the heat exchange fan 322.

In another embodiment, the heat exchanger body 321 has a first side and a second side distributed along a first direction on two sides of the heat exchanger body 321, the cooling unit 10 is located on the first side, and the heat exchange fan 322 is disposed on one side of the heat exchanger body 321 along a second direction perpendicular to the first direction. For example, the cooling unit 10 is located below the heat exchanger body 321, the heat exchange fan 322 is located at one side of the heat exchanger body 321 in the horizontal direction, and the outlet of the heat exchange fan is horizontally blown to the heat exchanger body 321, so as to avoid the damage to the cooling unit 10 caused by the direct blowing of the cold air passing through the heat exchanger body 321 to the lower side of the heat exchanger body 321.

Preferably, as shown in fig. 13 to 15, the air outlet center line of the heat exchange fan 322 is inclined toward the second side. For example, the air outlet of the heat exchange fan 322 is obliquely blown upwards 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 air is prevented from damaging the unit 10.

Preferably, the inclination angle a of the heat exchange fan 322 is greater than 0 ° and less than 90 °, preferably between 10 ° and 80 °, more preferably between 30 ° and 60 °, and even more preferably between 40 ° and 50 °, and the air passes through most areas of the heat exchanger body 321 but is not blown to the cooling 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 opposite to each other along the second direction. From opposite both sides simultaneously to heat exchanger body 321 bloies, improved heat exchange efficiency, the wind of both directions offsets each other to a certain extent simultaneously, avoids the cold wind to blow to the first side of heat exchanger body 321.

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

When the heat exchanger body 321 is located at the air outlet side of the heat exchange fan 322, and the heat exchange fans 322 disposed at two sides are symmetrically disposed, the cross point may be located in the heat exchanger body 321, most of the area of the heat exchanger body 321 may blow the air, or the cross point may exceed the heat exchanger body 321 and be located at the second side of the heat exchanger body 321, and the upper part of the area of the heat exchanger body 321 may not blow the air.

The inventor further researches and discovers that the larger the inclination angle a of the heat exchange fans 322 is, the larger the distance between the intersection and the base line is, and the larger the inclination angle a of the heat exchange fans 322 is, the less the wind blowing to the cooling-required unit 10 is, and the more direct cooling is approached. Therefore, as shown in fig. 14, the central axis of the air outlet 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, 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 a portion of the central axis of the heat exchanger body 321 along the first direction facing the first side. 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 thereof.

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

It should be noted that, the "cooling unit 10" described above is a portion that actually receives cooling capacity, for example, the cooling unit 10 includes a storage box 12 and a door 13, a heat exchange area and a storage area 14 are disposed in the storage box 12, the heat exchanger 32 is disposed in the heat exchange area, and the storage area 14 and goods located therein are "cooling units" that actually receive cooling capacity.

Preferably, the heat exchange area is located above the storage area 14, the cooling capacity is supplied from top to bottom, and the temperature of the whole storage area 14 is relatively uniform. Or, the heat exchange area is located at one side of the horizontal direction of the storage area 14, so that loading and unloading are not affected. Or the heat exchanger 32 is located at a side of the storage box 12 away from the door 13, so as to avoid cold leakage. Or the heat exchanger 32 is positioned at one of the door bodies 13, thereby facilitating maintenance.

Further, when the heat exchanger 32 includes at least one heat exchange fan 322, the heat exchange fan 322 is disposed on a side of the heat exchanger body 321 near the door 13, and cold air blows into the storage box 12, so as to avoid leakage of cold energy.

The 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 to be cooled, is also suitable for replacing the heat exchanger body 321 with cold sources such as a cold storage assembly and an evaporator of a refrigerating unit.

The heat exchanger 32 is preferably disposed on top of the storage box 12, and the heat exchanger 32 is fixed to the top wall, the side wall or the bottom wall of the storage box 12 by a fixing structure, wherein the fixing manner includes but is not limited to the following methods:

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

The heat exchanger 32 is indirectly fixed in the storage case by the second fixing 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 case. The keel frame comprises criss-cross brackets, and the bearing capacity is strong enough to fix the heat exchanger on the keel frame. The fixing mode can be fixed on the keel through fixing nails or the heat exchanger is hung on a hanging structure of the keel frame.

In another embodiment, as shown in fig. 16, the second fixing structure 324 includes 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 of the sliding frame 3241 to the other end, so that the installation is easy, and a plurality of heat exchangers are convenient to be installed on the same group of sliding frames 3241.

In the above two embodiments, the portable fresh-keeping box includes at least two cooling units, or the cooling units include at least two heat exchangers, that is, when a plurality of heat exchangers are fixed on the top of the storage box, the 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 frame 3242 is at least one hanger for fixing the keel frame or the sliding frame to the top wall of the storage box, or at least one side bracket for fixing the keel frame or the sliding frame to the side wall of the storage box, or at least two supporting frames for fixing the keel frame or the sliding frame to the bottom wall of the storage box.

Preferably, the support frame is disposed proximate to a sidewall of the storage case. In another preferred embodiment, the second fixing structure 324 includes at least two sliding frames disposed at intervals, and each sliding frame is fixed by at least two fixing frames. And the fixing frames of the two sliding frames are aligned or arranged in a dislocation manner in the extending direction of the sliding frames.

The first transfer unit 31 may be called a liquid supply pipe, and the second transfer unit 33 may be called a liquid return pipe, and the liquid cooling medium may be circulated between the cooling tank 201 and the heat exchanger 32 by a driving pump. The connection relationship of the first and second transmission units 31 and 33 and the cooling unit 20 will be described below with emphasis.

The first type of cooling unit 20 in communication with the first receiving area 202 and the second receiving area 203 is connected in a manner that, in a preferred embodiment, the first transfer unit 31 is in communication with the second receiving area 203, ensuring that there is sufficient flow of cooling medium in a liquid state to prevent the drive pump from idling into the air. The second transmission 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 conveying unit 33 is located above the first accommodating area 202, and the returned cold storage medium enters the first accommodating area 202 from the top downward, and is fully 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 at the middle-lower side of the first receiving area 202.

Further, the second transfer unit 33 includes a return tube 331 located above the first accommodating area 202, and a plurality of return ports are disposed on the return tube 331. Preferably, the diameter of the return port increases and/or the arrangement density of the return port increases in a direction from the heat exchanger 32 to a direction away from the heat exchanger 32 along the return tube 331. Wherein the increased arrangement density includes an increased number of the return ports, a decreased spacing of the return ports, and the like. By such design, the returned cold storage medium can be uniformly introduced into the cold storage tank 201, contrary to the pressure change of the liquid cold storage medium in the return pipe 331.

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

The communication between the second transmission unit 33 and the second accommodating area 203 is the same as the communication between the second transmission unit 33 and the first accommodating area 202, and will not be described again.

The second type of cooling unit 20 that is not communicated with the first accommodating area 202 and the second accommodating area 203 is that 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 type of embodiment, and will not be described 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 transmission unit 31 and the second transmission unit 33, and the plurality of heat exchangers 32 connected in series may cool one storage area or may cool 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.

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 cooling medium is in a liquid state, the driving element is a water pump, and when the cooling medium is in a gas state, the driving element is a fan.

A portion of the circulation line is arranged in heat transfer with the cold storage unit 20, e.g. a portion of the circulation line is located within the cold storage unit 20 and is in direct contact with the cold storage medium. The other part of the circulation line is arranged in heat conduction with the cooling 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 mode with the cooling unit 10 refer to the first type of cooling unit 30, which is not described herein.

Preferably, the pre-cooling fresh-keeping box 100 at least includes any two of the above cooling units 30, and can provide cooling capacity for the cooling unit 10 in at least two cooling modes, so that on one hand, the cooling fresh-keeping box can adapt to different cooling units 10, and on the other hand, when the cooling unit 10 needs a lot of cooling capacity, at least two cooling units 30 can be started, and when the cooling capacity of the cooling unit 10 is not large, one of the cooling units is preferentially selected to provide cooling capacity.

The heat conduction arrangement and the heat conduction connection means that the two can directly or indirectly exchange heat. And, any one of the above-mentioned cold storage units 20 can be used together with any one of the above-mentioned cold supply units 30 to form a cold storage and supply system. By the cold storage and supply system, a friendly low-temperature environment is provided for agricultural products such as fruits, which is equivalent to storing fruits in winter.

The invention realizes rapid cooling by adding solid cooling medium into the cooling tank 201. After the goods are added into the storage box 12, the cooling capacity is quickly supplied into the storage box 12 through the cooling unit 30 to realize precooling, when the temperature of the goods is reduced to the refrigerating or freezing temperature, the precooling stage is finished, and the cooling unit 30 supplies cooling capacity in a second cooling mode to enter the refrigerating or freezing stage. Wherein, the cooling capacity of the pre-cooling stage is larger than that of the refrigerating or freezing stage.

From the above, the mobile fresh box 100 of the present invention can be transported by a vehicle, and can reach the agricultural product base only by a road, and is very close to the picking place of the product. And the precooling is realized by 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 filling machine is arranged or not, so that the precooling of a production place can be realized. The cold chain vehicle is directly loaded from a goods source and is directly transported to a destination, so that the middle turnover process of the traditional cold chain vehicle is avoided, and the transportation efficiency is greatly improved.

After the agricultural products are picked, the agricultural products can enter the storage box 12 at the first time, the cooling unit 30 is started to enter the precooling process after the agricultural products are fully filled and closed, namely the agricultural products do not need to be pulled to a refrigerator for queuing precooling, boxing precooling can be achieved at the agricultural product base, freshness is locked in time, and taste and quality are guaranteed.

When the temperature of the agricultural products is reduced to the refrigerating or freezing temperature, the agricultural products can directly enter the refrigerating or freezing stage by adjusting the cooling mode, namely, the agricultural products can enter the refrigerating or freezing stage without being carried after precooling, and compared with the traditional cold chain transportation, the agricultural products can be carried for a plurality of times, so that the damage to the agricultural products caused by collision and extrusion is reduced.

In addition, the goods can enter the transportation process after being fully filled and closed, the pre-cooling, fresh-keeping and other processes are carried out in the transportation process, and the functions of loading, running, vehicle-mounted pre-cooling and in-process pre-cooling are truly realized, so that the products are unloaded from the boxing to the destination, the damage rate caused by collision of the goods is greatly reduced by carrying the products once, the goods are pre-cooled and refrigerated/frozen in the pre-cooling fresh-keeping box, the whole process is in the refrigeration or freezing environment provided by the refrigeration unit 30, the whole process is ensured to be continuous, and the phenomenon that the whole process can not be spanned in the cold transport at present is also not realized.

The inventors have further studied and found that the cold storage unit 20 is used to charge a large amount of solid cold storage medium to meet the pre-cooling demand of the goods, but this part of the cold storage medium increases the transportation cost. In addition, in the cooling or cold supply process, the solid cold storage medium is melted, the liquid cold storage medium is more and more, and the liquid cold storage medium is easy to shake and escape in the transportation process. Therefore, the invention further provides the discharging unit 40 to discharge the liquid cold storage medium outwards, on one hand, the amount of the solid cold storage medium which is added at one time can be reduced, the liquid cold storage medium is discharged after the liquid cold storage medium is melted, the solid cold storage medium is added again, namely, the solid cold storage medium is added in batches, the volume or the weight of the cold storage unit 20 is reduced, and the load capacity is increased, on the other hand, the weight can be reduced and the transportation cost can be reduced by discharging the liquid cold storage medium after releasing the cold energy even if the solid cold storage medium is added at one time.

The discharging unit 40 is a unit which is optionally added according to the requirement, and can be closed or removed.

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

Specifically, the first discharge port 401 is provided on the cold storage tank 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 difference in height between the first discharge port 401 and the bottom of the cold storage unit 20 is equal to or greater than 20 cm, preferably equal to or greater than 40 cm, preferably equal to or greater than 50 cm, preferably equal to or greater than 60 cm, preferably equal to or greater than 50 cm, preferably equal to or greater than 80 cm, preferably equal to or greater than 90 cm, preferably equal to or greater than 100 cm, to ensure that there is sufficient liquid cold storage medium in the cold storage unit 20 to avoid affecting 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.

Alternatively, the discharge unit 40 further comprises a first discharge port 401 'provided in the first transfer unit 31, or the discharge unit further comprises a first discharge pipe 402' connected to the first transfer unit 31. The first discharge port 401', the first discharge pipe 402' may also discharge the cold storage medium, which has released the cold, outwardly, or after the transportation is completed.

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'. The first discharge valve enables the discharge to be controllable in terms of time, space, temperature and the like. For example, the discharge may be performed during at least one of the pre-cooling, chilling or freezing stages, preferably after the pre-cooling is completed and before the return of the pull, reducing the power consumption of the vehicle. Or in wilderness field emission, avoiding the emission of toll stations, urban areas and other areas.

In another embodiment, the discharge unit further comprises 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 a second discharge pipe 404 connected to the second transfer unit 33, a second discharge valve opening or closing the second discharge pipe 404.

The present invention preferably discharges the cold storage medium from the second transmission unit 33, so that the heat exchange between the cold storage medium and the solid cold storage medium, which are returned, can be avoided, and the loss of cold can be avoided.

Further, the discharging unit further includes a sensor to detect an amount of the liquid-state cooling medium in the storage bin 12. When the amount of the liquid cold storage medium in the cold storage tank 201 reaches the maximum line, the second discharge valve is opened, and the cold storage medium is discharged to the outside 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, a part of the returned cold storage medium is discharged outwards, and a part of the returned cold storage medium flows back into the cold storage unit 20, so that the liquid cold storage medium in the cold storage tank 201 is prevented from being rapidly reduced. When the amount of the liquid cold storage medium in the cold storage tank 201 reaches the minimum line, 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 two discharging units are included, and the discharging 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 transmission unit 31, and a second sensor for detecting the temperature of the cold storage medium in the second transmission unit 33 or the cold storage unit, wherein the second discharging valve is opened when the temperature of the cold storage medium detected by the first sensor is low, and the first discharging valve is opened when the temperature detected by the first sensor is low, so that the cold storage medium with high temperature is preferentially discharged, and the cold waste is avoided.

In addition, for convenience of assembly, the invention refers to the modular arrangement of the cold storage unit 20 as a cold storage module, wherein the cold storage module comprises any one of the cold storage units 20, and at least one group of cold release interface ends for connecting with the cold supply unit 30 to allow the liquid cold storage medium to flow out and flow back. At this time, the cooling unit includes a cooling interface end connected to the cooling interface end to transfer the cooling capacity of the cooling medium to the cooling unit 10.

The cold-discharging interface end through which the liquid cold-storage medium flows out is communicated with the first transmission unit 31, and the communication mode of the cold-storage interface end and the cold-storage tank 201 is the same as the communication mode of the first transmission unit 31 and the cold-storage tank 201. The cold-discharging interface end for the liquid cold-storage medium to flow back is communicated with the second transmission unit 33, and the communication mode of the cold-storage interface end and the cold-storage tank 201 is the same as the communication mode of the second transmission unit 33 and the cold-storage tank 201.

Depending on the overall arrangement, the cooling module may also comprise at least a part of the cooling unit 30, for example with the return tube 331 of the cooling unit 30 and the return opening provided thereon as part of the cooling module.

The cold storage module may also include any of the discharge units 40 described above.

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

The cooling units 30 are in one-to-one correspondence with the cooling units 10, and each cooling unit 30 provides cooling capacity for one or more cooling units 10 corresponding to the cooling unit.

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

For example, one storage box 12 has a plurality of storage areas 14 therein, the cooling unit 20 is located at one side of the storage box 12, all the storage areas 14 are located at the same side thereof, or the cooling unit 20 is disposed in the middle of the storage box 12 to provide cooling energy to the storage areas 14 at both sides. Or, for example, a plurality of storage boxes 12 are arranged around the cooling unit 20.

Further, the cooling port 209 is disposed on a wall of the cooling unit 20 located in a part of the storage box 12, or the cooling port 209 is disposed on a wall of the cooling unit 20 adjacent to or shared by a part of the storage box 12, and at this time, the cooling port 209 is opened into the storage box 12, so that unnecessary leakage of cooling energy can be avoided, and a cooling medium needs to be added into the cooling unit 20 through the storage box 12. Or, the cooling port 209 is provided on a wall of the cooling unit 20 exposed to the outside of the movable fresh-keeping box 100, and can be used for loading and unloading the storage box 12 and simultaneously adding the cooling medium, thereby facilitating the supplement of the cooling medium in the middle.

When the precooling-fresh-keeping box is used for conveying agricultural products such as fruits, vegetables and the like, the air in the storage box 12 needs to be replaced in the conveying process due to the respiration of the fruits, the vegetables and the like. In the prior art, an air inlet window is usually provided at the front of the storage box 12, and the storage box is transported for about ten hours, and the air inlet window is opened to allow air to quickly enter the storage box 12 during the transportation process. On the one hand, the gas environment in the storage box 12 is poor when the storage box is transported for about ten hours, and on the other hand, the high-temperature gas passes through the storage box 12, so that the temperature in the storage box 12 is increased, and the cold chain transportation is broken.

In order to solve one of the above problems, the pre-cooling fresh-keeping box further comprises a ventilation assembly, the ventilation assembly comprises a first opening arranged at the front side and a second opening arranged at the rear side of the storage box 12 of the pre-cooling fresh-keeping box, and fresh air continuously enters the storage box 12 from the first opening and is discharged from the second opening during transportation, so that agricultural products such as fruits and vegetables are always in a fresh gas environment, and the fresh-keeping effect is good.

By controlling the area of the first opening, the amount of air entering the storage bin 12 is controlled, allowing the air entering the bin to be naturally vented. The first opening is arranged in such a way that the air inlet per hour is between 0.2 and 2 times of the volume of the movable fresh-keeping box at the moving speed of 60-90 km/hour, or the air inlet per hour can enable the air in the box to be replaced by between 0.3 and 5 wheels. For example, when the area of the first opening is equivalent to a circle with the same area, the diameter is 1 to 3 centimeters. It will be appreciated by those skilled in the art that the more loads, the less space, the more air substitutions the same area of first open mouth.

Preferably, the first opening has an area smaller than that of the second opening, allowing air to be controllably introduced into the case and then naturally discharged to the outside.

Further, in the embodiment in which the storage case 12 is divided into a plurality of storage areas 14 by a plurality of partition structures 11, ventilation holes are provided on the partition structures 11. Preferably, the ventilation holes in the partition structure 11 adjacent to the first opening are smaller than the ventilation holes in the partition structure 11 adjacent to the second opening.

Preferably, the refrigerator further comprises a shielding part matched with the vent hole, the area of the shielding part is larger than that of the vent hole, the upper part of the shielding part is a fixed end, and the rest is a free end, so that the shielding part can shield the vent hole under the action of gravity when loading, and the risk of leakage of cooling capacity from the vent hole is reduced. In the transportation, shelter from the portion by the wind blowing, make things convenient for the circulation of air.

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

In an embodiment, the cooling unit 20 is disposed at a front side in the storage box 12, a communication port through which air flows is provided between the storage box 12 and the cooling unit 20, and the first opening is in communication with the cooling unit 20. The air enters from the first opening, passes through the cold storage tank 201 first, exchanges heat with the cold storage medium, and enters into the rear storage box 12 after the temperature is reduced, so that the temperature fluctuation in the storage box 12 is avoided.

In another embodiment, the cold storage unit 20 is disposed at the front side outside 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 enters the storage box 12 through the first opening after the temperature is reduced.

In another embodiment, the air enters into the storage box 12 after the temperature is reduced by exchanging heat with a part of the cooling assembly, so as to avoid the large temperature fluctuation in the storage box 12.

Specifically, the air entering from the first opening is arranged in heat exchange with the first transmission unit 31, and/or the air entering from the first opening is arranged in heat exchange with the second transmission unit 33, and/or the air enters from the first opening and enters into the storage area 14 of the storage box 12 after heat exchange with at least part 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 entering from the first opening is heat exchanged with the discharging unit 40 and then enters the storage case 12.

Specifically, air entering from the first opening is in heat exchange with at least a portion of the first discharge pipe 402, and/or air entering from the first opening is in heat exchange with at least a portion of the second discharge pipe 404.

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

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

The humidifying unit 50 is used to provide the agricultural products with a suitable humidity, which is an optional unit, which may be selectively removed or turned off.

The humidification unit 50 is preferably a non-heated humidifier, or isothermal humidifier, such as an ultrasonic humidifier, a high pressure pump jet humidifier, or the like. Of course, other humidifiers may be used.

The humidifying unit includes a humidifier 501, a humidifying pipe 503 communicating with the humidifier 501 to discharge water vapor or mist to the outside, and the storage case 12 is humidified by the humidifying pipe 503.

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

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

In an embodiment, the other end of the water supply pipe 502 is in communication with the cold storage unit 20, in particular, the water supply pipe 502 is in communication with the first accommodation area 202 or the second accommodation area 203.

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

In another embodiment, the other end of the water supply pipe 502 communicates with the discharge unit 40. 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 feed pipe 502 communicates with the second discharge port 403 or the second discharge pipe 404.

Or the water tank of the humidifier 501 is in heat exchange with the cold storage unit, and the 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 may be disposed adjacent to the cold storage unit 20, or the humidification unit 50 may further include a cold transfer pipe, a cold transfer medium flowing in the cold transfer pipe, and a driving element for driving the cold transfer medium to flow in the cold transfer pipe, wherein a part of the cold transfer pipe is disposed in thermal conduction with the cold storage unit 20, for example, a part of the cold transfer pipe is disposed in the cold storage unit 20, preferably in direct contact with the storage Leng Jiezhi, and another part of the cold transfer pipe is disposed in the water tank of the humidifier 501 or wound on the water tank of the humidifier 501.

Or 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 sprayed mist or moisture has a low temperature.

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 opened to the outside of the mobile fresh-keeping box 100. When the water level line in the water tank reaches a certain height, water is discharged into the cold storage tank. So set up, need not automatically controlled water, practice thrift the power consumption, and the reliability is high. Of course, an electric valve may be provided in the water supply pipe 502 to control whether water is supplied according to the water level of the humidifier water tank tested by the water level meter or the like.

Further, the humidifying unit 50 further includes a humidity sensor located in the storage box 12, the humidifier and the humidity sensor are all 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 invention also provides a cold chain carrying tool, which comprises a carrying tool and any one of the movable fresh-keeping boxes positioned on the carrying tool. The vehicles include cars, boats, planes, etc.

The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, 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 modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A mobile fresh-keeping box, comprising:

The storage box comprises a storage box body, a cooling unit and a cooling unit, wherein the storage box body comprises a plurality of storage areas which are divided into by at least one dividing structure, and a heat exchange area is arranged above the storage areas or at one side in the horizontal direction;

The cold storage unit is used for accommodating solid and/or liquid cold storage media;

The heat exchanger is positioned at a heat exchange area and comprises a heat exchanger body and at least two heat exchange fans, the heat exchanger body is provided with a first side and a second side which are distributed on two sides of the heat exchanger body along a first direction, the storage area is positioned at a first side, the heat exchanger body is positioned at a suction area or an air outlet area of the heat exchange fans, the storage area is positioned at a non-air outlet area of the heat exchange fans, the heat exchange fans are arranged at one side of the heat exchanger body along a second direction which is perpendicular to the first direction, and at least two heat exchange fans are respectively arranged at two sides of the heat exchanger body which are opposite to each other along the second direction;

The electric control unit is in communication connection with the cooling unit, and the driving pump for providing liquid cold storage medium for at least one sub-cooling unit is independently controlled.

2. The mobile fresh box of claim 1, wherein the heat exchanger body includes a heat exchange tube.

3. The mobile fresh box of claim 1, wherein the heat exchanger body includes heat exchange tubes and heat dissipating fins.

4. The portable fresh-keeping box of claim 1, wherein when the storage area is in a closed state, the electronic control unit starts a driving pump corresponding to a heat exchanger positioned in a heat exchange area corresponding to the storage area.

5. The portable fresh food compartment of claim 1 wherein the electronic control unit further includes a sensor for detecting whether the storage area is in a closed condition.

6. The portable fresh food container according to claim 5, wherein the dividing structure includes an open state for opening the storage area and a closed state for closing the storage area, and the sensor includes a travel switch, a photo sensor, a pressure sensor, or an infrared sensor for detecting whether the dividing structure is in the closed state.

7. The mobile fresh box according to claim 1, wherein the cold storage unit further comprises a cold storage box, the cold storage box comprises a first containing area for containing a solid and/or liquid cold storage medium and a second containing area for containing a liquid cold storage medium, the first transmission unit is communicated with the second containing area, and the second transmission unit is communicated with the first containing area.

8. The mobile fresh box according to claim 1, wherein the cold storage unit further comprises a cold storage box, the cold storage box comprises a first containing area for containing a solid and/or liquid cold storage medium and a second containing area for containing a liquid cold storage medium, the first transmission unit is communicated with the second containing area, and the second transmission unit is communicated with the second containing area.

9. The portable fresh box according to claim 8, wherein the second transfer unit includes a return pipe above the first receiving area, and a plurality of return ports are provided on the return pipe, and the diameters of the return ports increase and/or the arrangement densities of the return ports increase along the return pipe in a direction from the heat exchanger to a direction away from the heat exchanger.

10. A cold chain vehicle comprising a vehicle, a mobile fresh box according to any one of claims 1 to 9 on the vehicle.