A cold chain transportation device with differential pressure precooling function

Abstract

This invention provides a cold chain transportation device with differential pressure precooling function, including a box and a refrigeration system. The box includes a top plate, a bottom plate, side plates, and partitions. The side plates are located between the top and bottom plates and are constructed as return air walls with air vents. The partitions are located below and spaced apart from the top plate to form a top air duct. A supply fan and a return fan are installed in the top air duct. The air inlet of the supply fan is connected to the air outlet of the refrigeration system via a cold air pipe that runs through the top air duct, and the air outlet of the supply fan is connected to the interior of the box. The air inlet of the return fan is connected to the interior of the box via an air vent, and the air outlet of the return fan is connected to the air inlet of the refrigeration system via the top air duct. A ripening agent delivery air duct is provided at the bottom of the box, and the ripening agent delivery air duct is provided with ripening agent ventilation holes. The internal air circulation method of the cold chain transportation device of this invention achieves uniform precooling, which saves storage space for fruits and vegetables inside the box and can also ripen fruits and vegetables.

Description

Technical Field

[0001] This invention belongs to the field of cold storage technology for fruit and vegetable logistics, and particularly relates to a cold chain transportation device with differential pressure pre-cooling function. Background Technology

[0002] When fruits and vegetables are picked from the fields, they carry a lot of field heat and release a lot of respiratory heat. In order to reduce the damage rate of fruits and vegetables, improve transportation efficiency, shorten the market cycle of fruits and vegetables, and improve the freshness of fruit and vegetable products, pre-cooling is an essential process.

[0003] Existing precooling equipment has a cold air fan installed inside the insulated box, connected to the refrigeration equipment. The differential pressure precooling method of this mobile containerized differential pressure precooling equipment is as follows: the cold air from the refrigeration equipment is blown to the fruits and vegetables inside the box through the cold air fan on the inner side panel to cool them down, and the heat released by the fruits and vegetables is extracted outside the box by the axial flow fan on the support. This method has the problems of insufficient internal storage space and uneven precooling.

[0004] Some pre-cooling equipment uses baffles to divide the ventilation path into multiple zones. Baffles can divide the space of the storage room into a forced ventilation zone and a differential pressure ventilation zone. However, this requires goods to be placed in a specific way, resulting in low space utilization; when there are many goods or the placement is off-center, the ventilation path will be blocked, and the pre-cooling effect will be poor.

[0005] However, the poor sealing performance of the various modules in the modular precooling equipment greatly reduces the precooling and insulation effect and consumes a lot of energy.

[0006] Furthermore, existing differential pressure precooling devices also have the problem of not being able to simultaneously achieve precooling and ripening functions.

[0007] Therefore, it is necessary to propose an improved cold chain transportation equipment with differential pressure precooling function to at least partially solve the problems existing in the prior art. Summary of the Invention

[0008] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed embodiments section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0009] To at least partially solve the above problems, this invention discloses a cold chain transportation device with differential pressure precooling function, including a box body and a refrigeration system located outside the box body. The box body includes: a top plate; a bottom plate; a side plate, the side plate being located between the top plate and the bottom plate, the side plate being constructed as a return air wall and provided with an air guide; and a partition, the partition being located below the top plate and spaced apart from the top plate to form a top air duct. A supply fan and a return fan are arranged in the top air duct, wherein the air inlet of the supply fan is connected to the air outlet of the refrigeration system via a cold air pipe penetrating the top air duct, and the air outlet of the supply fan is connected to the interior of the box body; the air inlet of the return fan is connected to the interior of the box body via the air guide, and the air outlet of the return fan is connected to the air inlet of the refrigeration system via the top air duct; a ripening agent conveying air duct is provided at the bottom of the box body, and the ripening agent conveying air duct is provided with ripening agent ventilation holes.

[0010] Preferably, it further includes a ripening agent storage device, which is connected to the ripening agent delivery duct.

[0011] Preferably, the housing further includes a front panel that separates the refrigeration system from the housing. The bottom of the housing is provided with a cover that is connected to the bottom plate and to the side plate and / or the front panel to form the ripening agent delivery duct.

[0012] Preferably, the ripening agent delivery duct extends from one side plate through the front end plate to the other side plate to form a U-shaped duct, and ripening agent ventilation holes are provided at both ends of the ripening agent delivery duct.

[0013] Preferably, the return air fan and the supply air fan are arranged sequentially along the length of the housing, the supply air fan is further away from the refrigeration system than the return air fan, the number of return air fans is set to multiple, and the number of supply air fans is at least one.

[0014] Preferably, partitions are provided at intervals along the length of the box on the side panel, and the partitions protrude into the box to divide the side panel into multiple return air zones.

[0015] Preferably, each of the return air zones is provided with an air guide vent.

[0016] Preferably, a wind deflector and / or a wind-blocking soft curtain are provided outside the air guide.

[0017] Preferably, the bottom of the housing is provided with a cover for forming the ripening agent delivery duct, and the bottom end of the partition extends to the cover.

[0018] Preferably, the cold chain transportation equipment is a container.

[0019] According to the cold chain transport equipment with differential pressure pre-cooling function of the present invention, the blower and the return air fan are arranged in the top air duct, and the side plate is constructed as a return air wall and is provided with air guides. The air inlet of the blower is connected to the air outlet of the refrigeration system through a cold air pipe penetrating the top air duct, and the air outlet of the blower is connected to the interior of the box. Cold air is blown out of the air outlet of the blower to the fruits and vegetables in the box for pre-cooling and cooling. The air inlet of the return air fan is connected to the interior of the box through the air guide, and the air outlet of the return air fan is connected to the air inlet of the refrigeration system through the top air duct. The hot air after heat exchange enters the return air wall through the air guide, then circulates into the top air duct, and is then sent back to the refrigeration system by the return air fan to circulate the gas inside the box. This invention ensures both storage space for fruits and vegetables inside the box and achieves uniform pre-cooling. In addition, the bottom of the box is equipped with a ripening agent delivery duct with ripening agent ventilation holes, which can be used to achieve simultaneous ripening of fruits and vegetables during pre-cooling. Attached Figure Description

[0020] The following drawings, which illustrate embodiments of the present invention, are incorporated herein by reference as part of the invention and are used to understand the invention. The drawings show embodiments of the invention and their descriptions to explain the principles of the invention. In the drawings,

[0021] Figure 1 This is a front cross-sectional schematic diagram of a cold chain transportation device with differential pressure precooling function according to a preferred embodiment of the present invention;

[0022] Figure 2 For along Figure 1 A cross-sectional view of line AA in the diagram;

[0023] Figure 3 For along Figure 1 A cross-sectional view of the BB line in the diagram;

[0024] Figure 4 for Figure 1 A top view of the supply and return air fans in the diagram;

[0025] Figure 5 For along Figure 2 A cross-sectional view of the CC line in the diagram;

[0026] Figure 6 for Figure 5 A schematic diagram showing the location of the ripening agent ventilation holes on the first surface of the cover; and

[0027] Figure 7 for Figure 5A schematic diagram showing the location of the ripening agent ventilation holes on the second surface of the cover.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1: Box body 2: Frame

[0030] 3: Refrigeration compressor unit; 4: Condensing heat exchanger

[0031] 5: Exhaust fan 6: Air conditioning duct

[0032] 7: Ripening agent storage device; 8: Ripening agent delivery pipe

[0033] 11: Top panel 12: Rear trunk door

[0034] 13: Side panel 131: First side panel

[0035] 132: Second side panel 133: Front panel

[0036] 14: Base plate 15: Partition plate

[0037] 16: Top air duct 18: Partition piece

[0038] 19: Wind deflector 20: Blower

[0039] 30: Return air fan; 40: Ripening agent delivery duct.

[0040] 401: Cover part; 4011: First surface

[0041] 4012: Second Surface

[0042] 41: Ventilation holes for ripening agents Detailed Implementation

[0043] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the invention.

[0044] To fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below; however, in addition to these detailed descriptions, the present invention may have other embodiments.

[0045] For reference Figures 1 to 4The cold chain transportation equipment with differential pressure precooling function of this embodiment will be described.

[0046] The cold chain transport equipment with differential pressure precooling function includes a container 1, with a frame 2 connected to one end of the container 1. The cold chain transport equipment can be a standard-sized container, and the container 1 and frame 2 are the two parts of the container.

[0047] A refrigeration system is installed within frame 2. The refrigeration system can be configured to include a refrigeration compressor unit 3 and an electrical control box fixedly installed on the lower inner side of frame 2, with the compressor unit 3 and control box placed side-by-side. A condensing heat exchanger 4, which can be a finned tube type, is installed on the upper inner side of frame 2 and connected to the compressor unit 3. There are two sets of condensing heat exchangers 4, with their inlet and outlet pipes merged and connected to the compressor unit 3 via piping. Two exhaust fans 5 are fixed on frame 2 above the condensing heat exchangers 4, arranged horizontally side-by-side. The exhaust fans 5 draw air from the bottom and sides of frame 2 and exhaust it upwards.

[0048] The housing 1 includes a top plate 11 at the top, a bottom plate 14 at the bottom, and side plates 13 between the top plate 11 and the bottom plate 14. The side plates 13 include a first side plate 131 and a second side plate 132, and a front panel 133 connecting the first side plate 131 and the second side plate 132. The first side plate 131 and the second side plate 132 are positioned opposite each other, and the front panel 133 separates the housing 1 from the frame 2. The housing 1 also includes a rear door 12 opposite to the front panel 133. The rear door 12 can be configured as a double-opening structure. The front panel 133, the first side plate 131, the second side plate 132, and the rear door 12 together define the internal space of the housing 1.

[0049] A partition 15 is provided at the top of the housing 1, spaced apart from and below the top plate 11, to form a top air duct 16. The first side plate 131, the second side plate 132, the top plate 11, and the partition 15 together define the top air duct 16. A supply fan 20 and a return fan 30 are provided within the top air duct 16. The supply fan 20 can be an axial flow fan. The return fan 30 can be a negative pressure return fan.

[0050] The first side panel 131 and the second side panel 132 can both be constructed as return air walls with partitions 18. Air guides are provided on the inner surfaces of both the first side panel 131 and the second side panel 132.

[0051] In addition, a cold air duct 6 is installed above the partition 15, which runs through the top air duct 16. The air inlet of the blower 20 is connected to the air outlet of the refrigeration compressor unit 3 via the cold air duct 6, and the air outlet of the blower 20 is connected to the interior of the housing 1, so that the cold air generated by the refrigeration compressor unit 3 is delivered to the blower 20 through the cold air duct 6, and then the cold air is discharged from the air outlet of the blower 20 and blown downward to the fruit and vegetable stacking area inside the housing 1, forming a pressure difference with the field heat and respiration heat released by the fruits and vegetables.

[0052] The air inlet of the return air fan 30 is connected to the interior of the box 1 via the air guide port, and the air outlet of the return air fan 30 is connected to the air inlet of the refrigeration compressor unit 3 via the top air duct 16, so that the hot air released by the fruits and vegetables enters the return air fan 30 through the air guide port and enters the top air duct 16 to circulate to the air inlet of the refrigeration compressor unit 3, thereby forming an air circulation inside the box.

[0053] Preferably, partition members 18 are evenly arranged along the length of the box body 1 on the first side plate 131 and the second side plate 132, respectively. The partition members 18 protrude into the box body 1 to divide the first side plate 131 and the second side plate 132 into multiple return air zones. In this embodiment, the partition members 18 are arranged perpendicular to the first side plate 131 and the second side plate 132. More preferably, an air guide is provided for each return air zone. For example, the partition 15 can be spaced apart from the first side plate 131 (second side plate 132) to form an air guide. Therefore, when fruits and vegetables are placed in each return air zone, after the cold air acts on the fruits and vegetables, the hot air released by the fruits and vegetables in each return air zone can enter the return air wall through the corresponding air guide, which can make the gas circulation inside the box smoother.

[0054] In order to allow the hot air released by the fruits and vegetables to enter the return air wall and the top air duct 16 more smoothly, preferably, a baffle plate 19 and / or a windproof curtain are provided outside the air guide.

[0055] To ensure that all fruits and vegetables inside the box receive uniform cooling air, preferably, the return fan 30 and the supply fan 20 are arranged along the length of the box body 1, with the supply fan 20 located at the farthest end, meaning it is further away from the refrigeration system than the return fan 30. Therefore, the supply fan 20 is located near the rear door 12, allowing it to blow air into the box from the outermost side, ensuring that all fruits and vegetables inside receive cooling air.

[0056] Furthermore, the number of return air fans 30 is set to multiple, and the number of supply air fans 20 is at least one. Multiple return air fans 30 can achieve rapid and uniform return air, resulting in a good pre-cooling effect. More preferably, the number of return air fans 30 can be set to six to ten. In this embodiment, eight return air fans 30 are set.

[0057] The bottom of the housing 1 of the cold chain transport equipment with differential pressure precooling function of the present invention is also provided with a ripening agent conveying air duct 40, and the ripening agent conveying air duct 40 is provided with ripening agent ventilation holes 41. The ripening agent ventilation holes 41 can be arranged in an array on the outer surface of the ripening agent conveying air duct 40.

[0058] Preferably, refer to Figure 5 The ripening agent delivery duct 40 can be formed by a cover 401 disposed at the bottom of the housing 1. For example, the cover 401 is connected to the bottom plate 14, and the cover 401 is connected to the side plate 13 and / or the front plate 133. Specifically, in one embodiment of the invention, the ripening agent delivery duct 40 is formed by the cover 401 disposed at the bottom of the housing 1 being connected to the bottom plate 14 and to the first side plate 131. In another embodiment of the invention, the ripening agent delivery duct 40 is formed by the cover 401 disposed at the bottom of the housing 1 being connected to the bottom plate 14 and to the second side plate 132. In yet another embodiment of the invention, the ripening agent delivery duct 40 is formed by the cover 401 disposed at the bottom of the housing 1 being connected to the bottom plate 14 and to the front plate 133. When a partition 18 is provided on the first side plate 131 and the second side plate 132, the bottom end of the partition 18 can extend to the cover 401.

[0059] To ensure the ripening agent is evenly distributed within the chamber 1, more preferably, refer to Figure 2 The ripening agent delivery duct 40 can extend from the first side plate 131 through the front end plate 133 to the second side plate 132 to form a U-shaped duct. Furthermore, both ends of the U-shaped duct can extend to the rear door 12. Ripening agent ventilation holes 41 can be provided at both ends of the ripening agent delivery duct 40, thereby allowing the ripening agent to be distributed more evenly under the action of the blower 20. In this embodiment, as... Figure 5 As shown, the cover 401 includes a first surface 4011 and a second surface 4012 that are perpendicular to each other, and the cross-section of the ripening agent delivery duct 40 is rectangular. Figure 6 and Figure 7 The ripening agent vents 41 are shown to be arranged in an array on the first surface 4011 and the second surface 4012 of the cover 401.

[0060] The ripening agent delivery duct 40 is located inside the housing 1. When ripening of fruits and vegetables is required during the pre-cooling process, ripening gas, such as ethylene, can be introduced into the ripening agent delivery duct 40. Therefore, the ripening agent storage device 7 for providing the ripening agent can be located inside the frame 2. The ripening agent storage device 7 is connected to the ripening agent delivery duct 40 through the ripening agent delivery pipe 8. An automatic switch device is installed on the ripening agent storage device 7 to control whether the ripening agent is delivered to the ripening agent delivery duct 40.

[0061] According to the cold chain transportation equipment with differential pressure pre-cooling function of the present invention, the blower 20 and the return air fan 30 are arranged in the top air duct 16, and the side plate 13 is constructed as a return air wall and is provided with air guides. The air inlet of the blower 20 is connected to the air outlet of the refrigeration system through the cold air pipe 6 that passes through the top air duct 16, and the air outlet of the blower 20 is connected to the interior of the box 1. Cold air is blown out through the air outlet of the blower 20 to the fruits and vegetables in the box for pre-cooling and cooling. The air inlet of the return air fan 30 is connected to the interior of the box 1 through the air guide, and the air outlet of the return air fan 30 is connected to the air inlet of the refrigeration system through the top air duct 16. The hot air after heat exchange enters the return air wall through the air guide and then circulates into the top air duct 16, and is then sent back to the refrigeration system by the return air fan 30 to circulate the gas inside the box. This invention not only ensures the storage space for fruits and vegetables inside the box, but also achieves a uniform pre-cooling effect. At the same time, the bottom of the box 1 is provided with a ripening agent conveying air duct 40, which is provided with ripening agent ventilation holes 41, which can be used to achieve simultaneous ripening of fruits and vegetables during pre-cooling.

[0062] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the invention. Terms such as “component” as used herein may refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” as used herein may refer to a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0063] The present invention has been described through the above embodiments; however, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the present invention to the described embodiments. Those skilled in the art will understand that many variations and modifications can be made based on the teachings of the present invention, and all such variations and modifications fall within the scope of protection claimed by the present invention.

Claims

1. A cold chain transportation device with differential pressure precooling function, characterized in that, The enclosure includes a housing and a refrigeration system located outside the housing. The housing includes a front panel that separates the refrigeration system from the housing. The housing also includes: roof; Base plate; The rear cargo door is opposite to the front panel; A side panel, located between the top plate and the bottom plate, is configured as a return air wall and is provided with an air guide vent; and A partition is located below and spaced apart from the top plate to form a top air duct, within which a supply fan and a return fan are installed. The air inlet of the blower is connected to the air outlet of the refrigeration system via a cold air pipe that passes through the top air duct, and the air outlet of the blower is connected to the interior of the housing. The air inlet of the return air fan is connected to the interior of the housing via the air guide, and the air outlet of the return air fan is connected to the air inlet of the refrigeration system via the top air duct. The return air fan and the supply air fan are arranged sequentially along the length of the housing. The supply air fan is further away from the refrigeration system than the return air fan. The supply air fan is located near the rear door. There are multiple return air fans and at least one supply air fan. The bottom of the box is provided with a ripening agent conveying air duct, and the bottom of the box is provided with a cover. The cover is connected to the bottom plate, and the cover is connected to the side plate and the front plate to form the ripening agent conveying air duct. The ripening agent delivery duct extends from one side plate through the front plate to the other side plate to form a U-shaped duct. Both ends of the U-shaped duct extend to the rear door, and ripening agent ventilation holes are provided at both ends of the ripening agent delivery duct. The cold chain transportation equipment also includes a ripening agent storage device, which is connected to the ripening agent conveying air duct.

2. The cold chain transportation equipment according to claim 1, characterized in that, On the side panel, partitions are spaced apart along the length of the housing, and the partitions protrude into the housing to divide the side panel into multiple return air zones.

3. The cold chain transportation equipment according to claim 2, characterized in that, Each of the aforementioned return air zones is provided with an air guide vent.

4. The cold chain transportation equipment according to claim 2, characterized in that, A wind deflector and / or a wind-blocking curtain are provided outside the air vent.

5. The cold chain transportation equipment according to claim 2, characterized in that, The bottom of the housing is provided with a cover for forming the ripening agent delivery duct, and the bottom end of the partition extends to the cover.

6. The cold chain transportation equipment according to claim 1, characterized in that, The cold chain transportation equipment is a container.

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