A portable semiconductor refrigeration fruit and vegetable picking box

Abstract

The present invention discloses a portable semiconductor refrigeration fruit and vegetable picking box, comprising a shell, a heat preservation cavity, a delivery buffer component, a refrigeration and heat dissipation component, a rechargeable battery component and a digital display temperature control system, wherein the heat preservation cavity is mounted on the shell, a mounting hole is provided on the top of the heat preservation cavity, the refrigeration and heat dissipation component is mounted on the mounting hole, the delivery buffer component is mounted on the top of the shell and extends into the heat preservation cavity, the rechargeable battery component is mounted between the shell and the heat preservation cavity, the digital display temperature control system is mounted on the outside of the shell, the digital display temperature control system and the refrigeration and heat dissipation component are both connected to the rechargeable battery component, and the digital display temperature control system is connected to the refrigeration and heat dissipation component. The present invention helps to reduce mechanical damage between fruits and vegetables, quickly reduce the respiration intensity of fruits and vegetables, and keep them fresh at low temperature during the picking process, and can play a good role in refrigeration and preservation.

Description

Technical Field

[0001] The invention relates to the technical field of fruit and vegetable cold chain logistics, and in particular to a portable semiconductor refrigeration fruit and vegetable picking box. Background Art

[0002] Cold chain transportation of fruits and vegetables can greatly increase the shelf life of fruits and vegetables. At present, vacuum pre-cooling technology, cold chain vehicle technology, and cold storage technology are quite mature and put into use. However, the time interval from the picking of fruits and vegetables to their transportation to cold chain vehicles or cold storage is generally more than 1-3 hours, or even longer. Most fruits and vegetables, especially rare fruits and vegetables, mature in summer and autumn, and the temperature is generally very high when they are picked. How to ensure that the fruits and vegetables are cooled to the refrigeration temperature as soon as they are picked until they are transported to cold chain vehicles or cold storage, and to minimize the collision damage between fruits and vegetables or between fruits and vegetables and the wall of the picking container during the picking of fruits and vegetables is a technical problem that needs to be solved urgently, and the technology or equipment in this area is still in a blank stage.

[0003] Picking is the first step in the transportation of fruits and vegetables, and the quality of fruits and vegetables is directly related to the performance of the picking container. When picking fruits and vegetables, their respiration intensity is still very high, especially when the ambient temperature is often high, which can easily lead to a decrease in the moisture and sugar content of fruits and vegetables. Moreover, some delicate fruits and vegetables are prone to skin damage if the picking container is not suitable, which will further reduce the quality of fruits and vegetables. At present, plastic buckets, plastic boxes, metal containers, bamboo baskets, foam boxes, etc. are generally used as picking containers for fruits and vegetables. When using these containers to harvest fruits and vegetables, since field picking often takes a long time, the picked fruits and vegetables cannot be immediately stored in the field cold chain vehicle, not to mention the factory's cold storage, which will increase the respiratory nutrient consumption of fruits and vegetables, and a large amount of respiratory heat accumulated in the picking box will further accelerate the reduction of the quality of fruits and vegetables. On the other hand, throwing fruits into hard containers during the harvesting process will also cause strong collisions and squeezing between fruits, which will cause the quality of fruits and vegetables to decline during the picking process, which is not conducive to the subsequent preservation of fruits and vegetables. Therefore, there is a huge market for portable low-temperature fruit and vegetable picking boxes that have good buffering effects and can work for a long time (such as 4-5 hours).

[0004] Semiconductor technology is a new type of refrigeration technology developed in the late 1950s. Semiconductor refrigeration, also known as thermoelectric refrigeration, electronic refrigeration or thermoelectric refrigeration, is a refrigeration method with thermoelectric effect as its main feature. It is composed of two main special semiconductor materials, P-type semiconductor material and N-type semiconductor material, forming NP junction, forming a thermocouple pair, and producing Peltier effect (when a DC current is passed through a closed loop composed of two different metals, one node will be hot and the other node will be cold), that is, a new type of refrigeration through DC refrigeration. Semiconductor refrigeration technology has the advantages of fast refrigeration speed, small size, easy to carry, no refrigerant, no pollution, no noise, easy maintenance, and long life. Semiconductor refrigeration technology has been widely used in medicine, agronomy, industry, and daily life. Generally, it is more used in some refrigeration equipment with small refrigeration capacity. For example, an existing intelligent convenient box based on semiconductor refrigeration has low refrigeration power and small volume, which is suitable for field water sample collection. From the refrigeration power (inferred from the area of ​​the solar panel) design to the function, it is not suitable for fruit and vegetable picking. Another example is the existing semiconductor refrigeration equipment. The semiconductor refrigeration heat dissipation component of this technology is designed at the bottom of the equipment, the cold air diffusion efficiency is low, and this technology does not have a temperature control system. This invention is not suitable for picking fruits and vegetables from the design to the function. At present, there is no feasible invention or report of a low-temperature fruit and vegetable picking box using semiconductor refrigeration. Summary of the invention

[0005] The purpose of the present invention is to overcome the technical problem in the prior art that when fruits are put into a picking box, collision or squeezing between the picking box and the fruits or between the fruits occurs, and a portable semiconductor refrigeration fruit and vegetable picking box is provided.

[0006] The objective of the present invention is achieved through the following technical solutions: A portable semiconductor refrigeration fruit and vegetable picking box, comprising an outer shell, an insulation cavity, a delivery buffer assembly, a refrigeration and heat dissipation assembly, a rechargeable battery assembly and a digital display temperature control system, wherein the insulation cavity is installed on the outer shell, a mounting hole is provided on the top of the insulation cavity, the refrigeration and heat dissipation assembly is installed in the mounting hole, the delivery buffer assembly is installed on the top of the outer shell and extends into the insulation cavity, the rechargeable battery assembly is installed between the outer shell and the insulation cavity, the digital display temperature control system is installed on the outside of the outer shell, the digital display temperature control system and the refrigeration and heat dissipation assembly are both connected to the rechargeable battery assembly, and the digital display temperature control system is connected to the refrigeration and heat dissipation assembly.

[0007] A better choice is that the delivery buffer assembly includes a heat preservation cover, a buffer cover sheet and a delivery buffer channel, one end of the delivery buffer channel is connected to the outer shell through the heat preservation cover, and the other end of the delivery buffer channel extends into the heat preservation cavity, and multiple buffer cover sheets are installed on the inner wall of the delivery buffer channel, and the multiple buffer cover sheets are staggered with gaps.

[0008] A better choice is that the delivery buffer component also includes a buffer strip and a crossbeam, the two ends of the crossbeam are respectively connected to the inner wall of the delivery buffer channel, the two adjacent crossbeams form an entrance for fruits and vegetables, the bottom of the crossbeam and the inner wall of the delivery buffer channel are connected to the buffer strip, and the multiple buffer strips form a fruit and vegetable buffer channel.

[0009] A better choice is that the refrigeration and heat dissipation component includes a semiconductor refrigeration plate, a hot end radiator and a cold end radiator. The semiconductor refrigeration plate is installed in the mounting hole, the hot end radiator is connected to the heating end of the semiconductor refrigeration plate, the cold end radiator is connected to the cooling end of the refrigeration plate, and the semiconductor refrigeration plate is connected to the rechargeable battery assembly through a digital display temperature control system.

[0010] A better choice is that the refrigeration and heat dissipation component also includes a heat dissipation fan and a cooling fan. The inner cavity of the shell is connected to the outside of the shell through the heat dissipation fan. The cooling fan is installed on the side of the cold end radiator. The heat dissipation fan and the cooling fan are both connected to the rechargeable battery assembly.

[0011] A more preferred option is that a side of the shell close to the refrigeration and heat dissipation component is provided with a plurality of first vent holes, and a side of the delivery buffer component close to the refrigeration and heat dissipation component is provided with a plurality of second vent holes.

[0012] A better choice, the digital display temperature control system includes a control display and a temperature sensor, the control display is installed on the outside of the shell, the temperature sensor is installed in the inner cavity of the insulation cavity, the temperature sensor is connected to the control display, the control display is connected to the rechargeable battery assembly, and the control display is connected to the refrigeration and heat dissipation assembly.

[0013] A better option is that the inner wall of the thermal insulation cavity is provided with a soft buffer thermal insulation layer.

[0014] A more preferred option also includes a knob switch and a box door, wherein the housing is hinged to one end of the box door, and the housing is connected to the other end of the box door via the knob switch.

[0015] A better option also includes a perforated partition, which divides the insulation cavity into a first cavity and a second cavity, and the delivery buffer cavity extends from the first cavity through the perforated partition into the second cavity, the refrigeration and heat dissipation component is installed in the first cavity, and the temperature sensor of the digital display temperature control system is installed in the second cavity.

[0016] The present invention has the following advantages and beneficial effects compared with the prior art:

[0017] 1. The present invention can ensure that fruits and vegetables play a good buffering role when they fall into the picking box during the picking process through the shell, the heat-insulating cavity, the delivery buffer component, the refrigeration and heat dissipation component, the rechargeable battery component and the digital display temperature control system, reduce the collision between fruits and vegetables and between fruits and vegetables and the container wall, and reduce the mechanical damage between fruits and vegetables; the delivery buffer component is detachably installed on the shell, and a picking box can be equipped with several buffer components of different models, which can be suitable for picking fruits of different sizes and hardness, and has the function of one box for multiple uses.

[0018] 2. The present invention uses the heat preservation cover, the buffer cover sheet and the delivery buffer channel to remove part of the field heat from the fruits and vegetables before they enter the heat preservation cavity, thereby achieving a cooling effect; the delivery buffer channel and the plurality of buffer cover sheets also have some of the functions of the cover, which can reduce the loss of cold air and play a role in energy saving.

[0019] 3. The present invention can ensure that the temperature of fruits and vegetables is lowered as quickly as possible and the breathing of fruits and vegetables is suppressed during the picking process through semiconductor refrigeration sheets, hot-end radiators and cold-end radiators, thereby improving the picking quality of fruits and vegetables and achieving seamless connection of fruits and vegetables from the field to cold chain vehicles or cold storage; the semiconductor refrigeration sheets, hot-end radiators and cold-end radiators are placed at the upper end of the insulation cavity, which is beneficial to the natural decline of cold air, which is beneficial to accelerating the temperature balance in the picking box, and also reduces the energy consumption of the fan in the box to a certain extent, preventing fruits and vegetables from direct contact with the semiconductor refrigeration end, and avoiding frostbite of fruits and vegetables.

[0020] 4. The present invention uses a heat dissipation fan and a cooling fan to perform efficient independent negative pressure heat dissipation on the hot end radiator of the semiconductor refrigeration plate, which promotes the circulation of airflow and is beneficial to improving the heat dissipation efficiency, thereby improving the refrigeration efficiency; the cooling fan blows air to the side of the cold end radiator, which can quickly make the inside of the picking box reach a preset temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of a portable semiconductor refrigeration fruit and vegetable picking box of the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of a portable semiconductor refrigeration fruit and vegetable picking box of the present invention;

[0023] Figure 3 It is a top view of a portable semiconductor refrigeration fruit and vegetable picking box of the present invention;

[0024] Figure 4 It is a bottom view of a buffer strip of a first setting mode of a portable semiconductor refrigeration fruit and vegetable picking box of the present invention;

[0025] Figure 5 It is a bottom view of a buffer strip of a second setting mode of a portable semiconductor refrigeration fruit and vegetable picking box of the present invention;

[0026] Markings of components in the accompanying drawings: 1. Shell; 11. First vent; 12. Box door; 13. Knob switch; 2. Insulation cavity; 21. Soft buffer insulation layer; 22. Perforated partition; 3. Refrigeration and heat dissipation assembly; 31. Hot end radiator; 32. Semiconductor refrigeration chip; 33. Cold end radiator; 34. Cooling fan; 35. Cooling fan; 36. Heat dissipation channel; 4. Digital temperature control system; 41. Temperature sensor; 42. Control display; 5. Delivery buffer assembly; 51. Insulation cover; 52. Buffer cover; 53. Buffer strip; 54. Delivery buffer channel; 55. Fruit and vegetable buffer channel; 56. Second vent; 57. Beam; 6. Rechargeable battery assembly. DETAILED DESCRIPTION

[0027] The purpose of the present invention is further described in detail below with reference to the accompanying drawings and specific examples. The examples cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following examples.

[0028] Embodiment 1

[0029] like Figure 1 As shown, a portable semiconductor refrigeration fruit and vegetable picking box includes a shell 1, a heat preservation cavity 2, a delivery buffer component 5, a rechargeable battery component 6, a digital display temperature control system 4 and two groups of refrigeration and heat dissipation components 3, the heat preservation cavity 2 is installed inside the shell 1, one end of the delivery buffer component 5 is installed on the top of the shell 1 and connected flush, the other end of the delivery buffer component 5 extends into the inner cavity of the heat preservation cavity 2, the top of the heat preservation cavity 2 is provided with two mounting holes, the two groups of refrigeration and heat dissipation components 3 are respectively installed on the two mounting holes, the delivery buffer component 5 is located between the two groups of refrigeration and heat dissipation components 3, one end of the delivery buffer component 5 is fixedly connected to the top of the shell 1 (located directly below the heat preservation cover), the other end of the delivery buffer component 5 extends into the inner cavity of the heat preservation cavity 2, the rechargeable battery component 6 is installed between the shell 1 and the heat preservation cavity 2 (located at the bottom of the shell 1), the digital display temperature control system 4 is installed on the outside of the shell 1, and the refrigeration and heat dissipation component 3 is connected to the rechargeable battery component 6 through the digital display temperature control system 4. The bottom of the picking box is provided with a knob switch 13 and a box door 12, which are located next to the rechargeable battery assembly 6. The housing 1 is hinged to one end of the box door 12, and the other end of the box door 12 is connected to the housing 1 through the knob switch 13. A shoulder strap is provided on the housing 1 for easy carrying.

[0030] The outer shell 1 is made of a hard plastic plate and has a rectangular structure; the heat preservation cavity 2 is made of a hard polyurethane heat preservation board, and the thickness of the heat preservation board is 3-8cm; the inner wall of the heat preservation cavity 2 is provided with a soft buffer heat preservation layer 21, which is made of rubber, and can reduce the collision between the heat preservation cavity 2 and the fruits and vegetables during the picking process, and further protect the picked fruits and vegetables; the function of the knob switch 13 and the box door 12 is to pour out the picked fruits and vegetables; the function of the delivery buffer component 5 is to minimize the collision damage during the picking and transportation of fruits and vegetables in the field, and play a role of partial heat preservation; the rechargeable battery component 6 includes a rechargeable battery and a circuit, which serves as the total power supply of the picking box, and provides power for the refrigeration and heat dissipation component 3, the digital display temperature control system 4, and the fan (including the cooling fan 35 and the heat dissipation fan 34); the digital display temperature control system 4 controls the temperature in the box to maintain it in a stable range; the function of the refrigeration and heat dissipation component 3 is to cool the inside of the picking box and store the fruits and vegetables in an environment with a suitable temperature.

[0031] The delivery buffer assembly 5 includes a heat preservation cover 51, a delivery slowing channel 54, 6 semicircular buffer cover sheets 52 and a buffer strip 53. The top of the delivery slowing channel 54 is installed on the outer shell 1 through the heat preservation cover 51. The perforated partition divides the heat preservation cavity 2 into a first cavity and a second cavity. The delivery slowing channel 54 passes through the perforated partition 22 and then extends into the second cavity. The refrigeration and heat dissipation assembly 3 is located at the top of the first cavity. The 6 semicircular buffer cover sheets 52, 3 on each side, are fixedly installed on the inner wall of the delivery slowing channel 54. At the same time, the semicircular buffer cover sheets 52 on both sides are interlaced with gaps to form a zigzag channel for buffering and passing of fruits and vegetables. Figure 4 As shown, four crossbeams 57 are installed on the inner wall of the bottom of the slowing-down channel 54. The centers of the four crossbeams intersect each other, and a fruit and vegetable entrance is formed between two adjacent crossbeams 57. More crossbeams 57 can be added to adjust the size of the fruit and vegetable entrance according to the size of different fruits and vegetables. The bottom of the crossbeam 57 and the inner wall of the slowing-down channel 54 are connected with a plurality of buffer strips 53. The buffer strips 53 are regularly distributed, and a fruit and vegetable buffer channel 55 is formed between the plurality of buffer strips 53. The size of the fruit and vegetable buffer channel 55 can be changed by increasing or reducing the number of crossbeams 57, and can be adjusted according to the size of the fruits and vegetables to ensure that the buffer strips play a buffering role.

[0032] The insulation cover 51 is composed of two insulation sheets that can be opened and closed horizontally. Both insulation sheets are provided with grooves, which are mainly for the convenience of opening and closing the insulation cover and can play a certain insulation effect; the slowing down channel 54 can play an insulation effect and play a buffering role for picked fruits and vegetables; the perforated partition 22 can prevent the collision between fruits and vegetables and the refrigeration and heat dissipation component 3. The function of the 6 buffer cover sheets 52 is that the fruits and vegetables roll on the buffer cover sheets 52, slowing down the natural gravity and preventing the fruits and vegetables from being damaged due to falling; the main function of the buffer strip 53 is to allow the picked fruits and vegetables to fall along a certain trajectory, further playing a buffering role.

[0033] The refrigeration and heat dissipation component 3 includes a semiconductor refrigeration sheet 32, a hot end radiator 31, a cold end radiator 33, a cooling fan 34 and a cooling fan 35. The semiconductor refrigeration sheet 32 ​​is bonded with an insulation board of equal thickness (not shown in the figure) through epoxy resin glue. The insulation board is installed in the mounting hole. The hot end radiator 31 is connected to the heating end of the semiconductor refrigeration sheet 32 ​​through 0.2-2mm thick thermal conductive silicone grease and epoxy resin glue. The cold end radiator 33 is connected to the cooling end of the semiconductor refrigeration sheet 32 ​​through 0.2-2mm thick thermal conductive silicone grease and epoxy resin glue. The cooling fan 35 is suspended and installed on one side of the cold end radiator 33. The cooling fan 34 is installed on the side of the outer shell, located on the side of the hot end radiator 31. The cooling fan 35, the cooling fan 34 and the semiconductor refrigeration sheet 32 ​​are all connected to the rechargeable battery assembly 6, and the semiconductor refrigeration sheet 32 ​​is connected to the digital display temperature control system 4. The length and width of the hot end radiator 31 and the cold end radiator 33 are greater than or equal to the length and width of the semiconductor cooling sheet 32. The housing 1, the cooling and heat dissipation assembly 3 and the delivery buffer assembly 5 form two heat dissipation channels 36. The heat dissipation channel 36 is a small rectangular parallelepiped structure located at the upper part of the picking box. A plurality of first vents 11 are provided on one side of the top of the housing 1 close to the hot end radiator 31, and a plurality of second vents 56 are provided on one side of the delivery buffer channel 54 of the delivery buffer assembly 5 close to the semiconductor cooling sheet 32.

[0034] The power of the semiconductor cooling chip 32 is 5-120W, and its function is to discharge the heat in the heat preservation cavity 2 of the picking box to the outside of the picking box; the hot end radiator 31 is a heat-conducting aluminum plate with multiple secondary heat dissipation fins, and its function is to dissipate the heat of the hot end of the semiconductor cooling chip 32; the cold end radiator 33 is a heat-conducting aluminum plate with multiple secondary heat dissipation fins, and its function is to quickly cool down the internal temperature of the heat preservation cavity 2; the cooling fan 35 is used to lateral air supply to the cold end radiator 33. The thermal grease is evenly applied to the inside to play a role in heat conduction, and the epoxy resin glue is located on the outside, about 2-5mm wide, and plays a role in bonding and sealing the thermal grease. The cooling fan 34 performs efficient independent exhaust-type heat dissipation on the hot end radiator 31 of the semiconductor cooling chip 32; the first vent 11 is conducive to improving the heat dissipation efficiency, thereby improving the cooling efficiency; the second vent 56 is used to dissipate heat to the inner cavity of the delivery buffer channel 54. The inner net width of the heat dissipation channel 36 is 0.5-3 cm larger than the width of the hot end heat sink 31 , and the height is 0.5-2 cm higher than the height of the hot end heat sink 31 .

[0035] The digital display temperature control system 4 includes a control display 42 and a temperature sensor 41. The control display 42 is installed on the outside of the housing 1. The temperature sensor 41 is suspended below the perforated partition 22 of the heat preservation cavity 2 and is absolutely protected by a metal sleeve. The metal sleeve is attached with a soft and breathable polystyrene film. The temperature sensor 41 is connected to the control display 42, the control display 42 is connected to the rechargeable battery assembly 6, and the control display 42 is connected to the refrigeration and heat dissipation assembly 3. The digital display temperature control system 4 controls the temperature of the box between -2 and 18°C, usually 0 to 10°C. The control display 42 is composed of a PLC controller and a display. Its function is to control and display the internal temperature of the heat preservation cavity 2, which is convenient for regulating the ambient temperature of fruits and vegetables; the function of the temperature sensor 41 is to collect the internal ambient temperature of the heat preservation cavity 2; the perforated partition 22 is used to separate the refrigeration and heat dissipation assembly 3 from the fruit to prevent the fruit from colliding with the refrigeration and heat dissipation assembly 3.

[0036] The outer dimensions (length × width × height) of the picking box in this embodiment are: 36 × 26 × 33 cm; the specifications of the rechargeable battery are voltage 12V, capacity 40AH, and the box can work continuously for 5 hours when the battery is running; the power of the semiconductor cooling plate 32 is 40W; the size of the radiator (including the cold end radiator 33 and the hot end radiator 31) is 8 × 10 × 3 cm; the size of the heat dissipation channel 36 is 9 × 12 × 4 cm; the specifications of the cooling fan 34 are voltage 12V, power 6W, and the voltage of the cooling fan 35 is 12V, power 3W. The dimensions of the first vent 11 and the second vent 56 are both 3.2mm in diameter and 14 in number. The rechargeable battery assembly 6 is used to power the cooling and heat dissipation assembly 3, so that the cold generated by the semiconductor cooling plate 32 can circulate in the entire insulation cavity 2 through the cold end radiator 33 and the cooling fan 35. The temperature in the box is controlled by the digital display temperature control system 4, and the temperature in the heat preservation cavity 2 is controlled within the range of 0-4°C. The refrigeration efficiency of the unloaded picking box reaches 2°C within 20 minutes of unloaded operation. The picking box of this embodiment is suitable for picking delicate and small fruits such as wolfberry, raspberry, and blueberry.

[0037] Embodiment 2

[0038] Except for the following technical features, the other technical features of this embodiment are the same as those of the first embodiment:

[0039] In this embodiment, one end of the delivery buffer assembly 5 is connected to the top of the housing 1 by a screw-type detachable installation instead of a fixed connection.

[0040] In this embodiment, the six semicircular buffer cover plates 52 are connected to the inner wall of the slowing-down channel 54 by spiral detachable installation instead of fixed connection.

[0041] like Figure 5 As shown, in this embodiment, multiple beams 57 are arranged in parallel and distributed in sequence and both ends are connected to the inner wall of the delivery buffer channel 54 instead of the multiple beams 57 crossing in the center and being connected to the inner wall of the delivery buffer channel 54 at both ends.

[0042] In this embodiment, the buffer strip 53 is deleted for harvesting larger fruits and vegetables.

[0043] The outer dimensions (length×width×height) of the picking box in this embodiment are 42×30×36 cm instead of 6×26×33 cm.

[0044] The specifications of the rechargeable battery in this embodiment adopt a voltage of 12V and a capacity of 80AH instead of 12V, 40AH.

[0045] The power of the semiconductor cooling plate 32 in this embodiment is 80W instead of 40W.

[0046] The specifications of the cooling fan 34 in this embodiment adopt a voltage of 12V and a power of 9W instead of a voltage of 12V and a power of 6W.

[0047] The dimensions of the heat dissipation channel 36 in this embodiment are 9×12×4 cm instead of 10×13×4 cm.

[0048] The specifications of the cooling fan 35 in this embodiment adopt a voltage of 12V and a power of 5W instead of a voltage of 12V and a power of 3W.

[0049] In the present embodiment, the diameters of the first vent holes 11 and the second vent holes 56 are both 3.6 mm instead of 3.2 mm, and the number of the first vent holes 11 and the second vent holes 56 are both 16 instead of 14.

[0050] The cooling efficiency of this embodiment is to reach 4°C within 12 minutes of no-load operation instead of reaching 2°C within 20 minutes.

[0051] The picking box of this embodiment is suitable for picking fruits and vegetables such as lychees and cherry tomatoes.

[0052] Embodiment 3

[0053] Except for the following technical features, the other technical features of this embodiment are the same as those of the first embodiment:

[0054] The connection mode between one end of the delivery buffer assembly 5 and the top of the housing 1 is detachably mounted by a slot instead of a fixed connection.

[0055] In this embodiment, the six semicircular buffer cover plates 52 and the inner wall of the slowing-down channel 54 are connected by detachable mounting through a card slot instead of fixed connection.

[0056] The specifications of the rechargeable battery in this embodiment adopt a voltage of 12V and a capacity of 10AH instead of a voltage of 12V and a capacity of 40AH, which can reduce the weight of the picking box.

[0057] The above specific implementation modes are preferred embodiments of the present invention and cannot be used to limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. A portable semiconductor refrigeration fruit and vegetable picking box, characterized in that: It comprises a shell, a heat preservation cavity, a delivery buffer component, a semiconductor refrigeration and heat dissipation component, a rechargeable battery component and a digital display temperature control system, wherein the heat preservation cavity is installed inside the shell, a mounting hole is provided on the top of the heat preservation cavity, the semiconductor refrigeration and heat dissipation component is installed in the mounting hole, the delivery buffer component is installed on the top of the shell and extends into the heat preservation cavity, the rechargeable battery component is installed between the shell and the heat preservation cavity, the digital display temperature control system is installed on the outside of the shell, the digital display temperature control system and the semiconductor refrigeration and heat dissipation component are both connected to the rechargeable battery component, and the digital display temperature control system is connected to the semiconductor refrigeration and heat dissipation component; The delivery buffer assembly comprises a heat preservation cover, a buffer cover sheet and a delivery buffer channel, one end of the delivery buffer channel is connected to the outer shell through the heat preservation cover, and the other end of the delivery buffer channel extends into the heat preservation cavity, a plurality of the buffer cover sheets are installed on the inner wall of the delivery buffer channel, and the gaps between the plurality of the buffer cover sheets are staggered to form a folded line channel for buffering and passing of fruits and vegetables; A side of the shell close to the semiconductor refrigeration and heat dissipation component is provided with a plurality of first vent holes, and a side of the delivery buffer component close to the semiconductor refrigeration and heat dissipation component is provided with a plurality of second vent holes.

2. A portable semiconductor refrigeration fruit and vegetable picking box according to claim 1, characterized in that: The delivery buffer component also includes a buffer strip and a crossbeam, the two ends of the crossbeam are respectively connected to the inner wall of the bottom of the delivery buffer channel, and a fruit and vegetable entrance is formed between two adjacent crossbeams. The bottom of the crossbeam and the inner wall of the delivery buffer channel are both connected to the buffer strip, and a plurality of buffer strips form a fruit and vegetable buffer channel.

3. The portable semiconductor refrigeration fruit and vegetable picking box according to claim 1, characterized in that: The semiconductor refrigeration and heat dissipation component includes a semiconductor refrigeration plate, a hot end radiator and a cold end radiator. The semiconductor refrigeration plate is installed in the mounting hole, the hot end radiator is connected to the heating end of the semiconductor refrigeration plate, and the cold end radiator is connected to the cooling end of the refrigeration plate. The semiconductor refrigeration plate is connected to the rechargeable battery assembly through a digital display temperature control system.

4. The portable semiconductor refrigeration fruit and vegetable picking box according to claim 3, characterized in that: The semiconductor refrigeration and heat dissipation component also includes a heat dissipation fan and a cooling fan. The inner cavity of the shell is connected to the outside of the shell through the heat dissipation fan. The cooling fan is installed on the side of the cold end radiator. The heat dissipation fan and the cooling fan are both connected to the rechargeable battery assembly.

5. The portable semiconductor refrigeration fruit and vegetable picking box according to claim 1, characterized in that: The digital display temperature control system includes a control display and a temperature sensor. The control display is installed on the outside of the shell, and the temperature sensor is installed in the inner cavity of the insulation cavity. The temperature sensor is connected to the control display, and the control display is connected to the rechargeable battery assembly, and the control display is connected to the semiconductor refrigeration and heat dissipation assembly.

6. The portable semiconductor refrigeration fruit and vegetable picking box according to claim 1, characterized in that: The inner wall of the heat-insulating cavity is provided with a soft buffer heat-insulating layer.

7. The portable semiconductor refrigeration fruit and vegetable picking box according to claim 1, characterized in that: It also includes a knob switch and a box door. The shell is hinged to one end of the box door, and the shell is connected to the other end of the box door through the knob switch.

8. The portable semiconductor refrigeration fruit and vegetable picking box according to claim 1, characterized in that: It also includes a perforated partition, which divides the insulation cavity into a first cavity and a second cavity. The delivery buffer channel extends from the first cavity through the perforated partition into the second cavity. The semiconductor refrigeration and heat dissipation component is installed in the first cavity, and the temperature sensor of the digital display temperature control system is installed in the second cavity.

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