Refrigeration box body structure and refrigerator car

Abstract

The invention discloses a refrigeration box body structure and a refrigerator car, and relates to the technical field of cold chain transportation. The refrigeration box mechanism comprises a box body, and the interior of the box body is divided into a refrigeration chamber and a storage chamber through a partition plate. A refrigerating unit for generating cold air is arranged in the refrigerating chamber, and the storage chamber is used for placing fruits and vegetables to be transported; the air inlet end of the air duct is communicated with the refrigeration chamber, and the air outlet end of the air duct is communicated with the storage chamber, so that the cold air can flow from the refrigeration chamber to the storage chamber through the air duct; a plurality of air outlet holes are formed in the air outlet end of the air duct and are arranged in a linear array mode in the length direction of the storage chamber, and the diameters of the air outlet holes are gradually increased in the direction away from the refrigeration chamber. According to the technical scheme provided by the invention, the cooling area of cold air can be effectively and uniformly distributed, so that the condition of non-uniform temperature and humidity of the area in the storage room is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cold chain transportation, and particularly relates to a refrigerated box structure and a refrigerated truck. Background Art

[0002] Refrigerated boxes such as freezers are a kind of fresh-keeping refrigeration equipment that can keep fruits and vegetables and other food materials at a constant low temperature to extend their storage period; refrigerated trucks equipped with the above refrigerated boxes are widely used in the field of cold chain transportation. In the prior art, the refrigerated box is generally divided into a refrigeration chamber for placing a refrigeration unit and a storage chamber for storing fruits and vegetables by a partition, and the cold air generated by the refrigeration unit is made to flow to the storage chamber to refrigerate and preserve the fruits and vegetables in the storage chamber. The above refrigerated box structure cannot evenly distribute the cooling area of the cold air, resulting in uneven temperature and humidity in some areas of the storage chamber, and the refrigeration and preservation effect of the fruits and vegetables is not good.

[0003] It should be noted that the above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main object of the present invention is to propose a refrigerated box structure and a refrigerated truck, aiming to effectively and evenly distribute the cooling area of the cold air, so as to avoid uneven temperature and humidity in some areas of the storage chamber, thereby ensuring the refrigeration and preservation effect of fruits and vegetables.

[0005] To achieve the above object, the present invention proposes a refrigerated box structure; Specifically, the refrigerated box structure includes: A box body, the interior of the box body is divided into a refrigeration chamber and a storage chamber by a partition; a refrigeration unit for generating cold air is arranged in the refrigeration chamber, and the storage chamber is used for placing fruits and vegetables to be transported; An air duct, the air inlet end of the air duct is communicated with the refrigeration chamber, and the air outlet end of the air duct is communicated with the storage chamber, so that the cold air can flow from the refrigeration chamber to the storage chamber through the air duct; wherein a plurality of air outlet holes are arranged at the air outlet end of the air duct, the plurality of air outlet holes are arranged in a linear array along the length direction of the storage chamber, and the aperture of the air outlet holes gradually increases in the direction away from the refrigeration chamber.

[0006] In an embodiment, an induced draft fan is arranged at the air inlet end of the air duct; under the driving action of the induced draft fan, the cold air flows from the refrigeration chamber to the storage chamber; In an embodiment, the air outlet holes are in a conical structure, the end with a relatively small aperture of the air outlet holes is communicated with the air duct, and the end with a relatively large aperture of the air outlet holes is communicated with the storage chamber.

[0007] In one embodiment, a temperature and humidity sensor is provided in the storage chamber, and a first air volume regulating component and / or a second air volume regulating component are provided inside the air duct, wherein the first air volume regulating component is provided at the air inlet end of the air duct, and the second air volume regulating component is provided at the air outlet end of the air duct; the temperature and humidity sensor is electrically connected to the first air volume regulating component and the second air volume regulating component.

[0008] In one embodiment, the first air volume regulating component includes a first baffle and a rotation driving device, and the first baffle is rotatably connected inside the air duct; the driving end of the rotation driving device is connected to the first baffle so that the first baffle can rotate around its own axis, thereby adjusting the passage opening area of the air duct; wherein the rotation driving device adopts hydraulic transmission.

[0009] In one embodiment, the rotation driving device includes a first gear and a first rack that are meshed and connected to each other, and the first gear is fixedly connected to the first baffle through a first connecting piece arranged coaxially; the opposite ends of the first rack are respectively slidably connected in a first oil cavity, wherein a first oil body is hermetically filled between the end of the first rack and the first oil cavity, and by adjusting the volume ratio between the first oil bodies in the two first oil cavities, the first rack is driven to slide relative to the first oil cavity, and further the first gear is driven to rotate.

[0010] In one embodiment, the second air volume regulating component includes a second baffle and a sliding driving device, the second baffle is slidably connected inside the box body, and the second baffle penetrates through a plurality of the air outlet holes; a plurality of ventilation holes are provided in the second baffle, and the ventilation holes correspond to the air outlet holes one by one; the driving end of the sliding driving device is connected to the second baffle so that the second baffle can slide relative to the box body, and by adjusting the communication area between the air outlet holes and the ventilation holes, the opening area of the air outlet holes is adjusted; wherein the sliding driving device adopts hydraulic transmission.

[0011] In one embodiment, the sliding driving device includes a second gear and a second rack that are meshed and connected to each other, the second gear is fixedly connected to a third gear through a second connecting piece arranged coaxially, and a third rack is fixedly connected to the end of the second baffle, and the third rack is meshed with the third gear; the opposite ends of the second rack are respectively slidably connected in a second oil cavity, wherein a second oil body is hermetically filled between the end of the second rack and the second oil cavity, and by adjusting the volume ratio between the second oil bodies in the two second oil cavities, the second rack is driven to slide relative to the second oil cavity, and further the second gear is driven to rotate.

[0012] In one embodiment, the refrigerated box body structure includes a humidity adjustment component, and the humidity adjustment component is electrically connected to the temperature and humidity sensor; The humidity adjustment component includes a water storage tank, a dehumidifying device, and a humidifying device. The water inlet end of the water storage tank is connected to the dehumidifying device through a dehumidifying pipe, and a first water pump is arranged on the dehumidifying pipe. The first water pump is used to transfer the water absorbed by the dehumidifying device to the water storage tank; the water outlet end of the water storage tank is connected to the humidifying device through a humidifying pipe, and a second water pump is arranged on the humidifying pipe. The second water pump is used to transfer the water stored in the water storage tank to the humidifying device.

[0013] In one embodiment, the refrigeration unit includes a plurality of ice boxes; and the ice boxes are pre-frozen during the low valley period of the peak-valley electricity price.

[0014] To achieve the above object, the present invention provides a refrigerated truck, and the refrigerated truck includes the refrigerated box body structure described in any one of the above.

[0015] The technical solution of the present invention is to set an air duct, and the air inlet end and the air outlet end of the air duct are respectively communicated with the refrigeration chamber and the storage chamber, so that the cold air generated by the refrigeration unit can flow from the refrigeration chamber to the storage chamber through the air duct, thereby refrigerating and preserving the fruits and vegetables placed in the storage chamber; A plurality of air outlet holes are arranged at the air outlet end of the air duct. The plurality of air outlet holes are arranged in a linear array along the length direction of the storage chamber, and the aperture of the air outlet holes gradually increases in the direction away from the refrigeration chamber; this is because after the cold air flows out of the refrigeration chamber, its temperature is relatively low and the flow rate is relatively fast. If the aperture of the air outlet holes near the refrigeration chamber is too large at this time, a large amount of cold air will quickly flow out from the air outlet holes near the refrigeration chamber to the storage chamber, resulting in the outflow amount of cold air near the refrigeration chamber in the storage chamber being greater than the outflow amount of cold air far from the refrigeration chamber in the storage chamber, that is, the cooling area cannot be effectively and evenly distributed; based on the above considerations, the present invention designs the aperture of the air outlet holes to gradually increase in the direction away from the refrigeration chamber. On the one hand, it makes the flow rate of the cold air moderate, and on the other hand, the outflow amount of the cold air in each area of the storage chamber is roughly the same, so as to ensure the effective and even distribution of the cooling area of the cold air, avoid the situation of uneven temperature and humidity in the storage chamber, and further ensure the refrigeration and preservation effect of the fruits and vegetables.

[0016] Understandably, according to the principles of fluid mechanics, in a duct, the smaller the aperture, the faster the air flow velocity. At the same time, since heat exchange occurs during the flow of cold air in the air duct, the temperature of the cold air rises as the flow distance increases, that is, the temperature of the cold air at the air outlet hole farther from the refrigeration chamber is higher, and the temperature of the cold air at the air outlet hole closer to the refrigeration chamber is lower. To ensure the effective and uniform distribution of the cooling area of the cold air, in this embodiment, the aperture of the air outlet hole is designed to gradually increase. Specifically, the aperture of the air outlet hole closest to the refrigeration chamber is the smallest, and the aperture of the air outlet hole farthest from the refrigeration chamber is the largest. In this way, it can be ensured that on the side close to the refrigeration chamber, the cold air flows out at a higher flow velocity and a lower temperature, and on the side far from the refrigeration chamber, the cold air flows out at a lower flow velocity and a higher temperature, which helps to control the air flow velocity of the cold air, ensure an appropriate cold air flow rate, ensure the uniform distribution of the cold air, and effectively avoid the situation of some areas in the storage room being too cold or too hot. Through the above structure, the flow velocity and distribution of the cold air can be precisely controlled, ensuring that the cold air evenly covers the entire storage room, thereby improving the refrigeration efficiency. In addition, the optimized air flow reduces unnecessary energy waste, enables the cold air in the storage room to be more efficiently transmitted to each area, reduces the burden on the refrigeration system, and saves energy. In addition, it can also reduce temperature fluctuations and ensure the quality and freshness of fruits and vegetables during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the refrigerated box body structure provided by the present invention; Figure 2 is Figure 1 a partial enlarged view of part A in Figure 3 It is a schematic structural diagram of the air outlet hole in an embodiment of the refrigerated box body structure provided by the present invention; Figure 4 It is a schematic structural diagram of the air duct in an embodiment of the refrigerated box body structure provided by the present invention; Figure 5 It is a schematic structural diagram of the first air volume adjustment component in an embodiment of the refrigerated box body structure provided by the present invention; Figure 6 It is a schematic structural diagram of the second air volume adjustment component in an embodiment of the refrigerated box body structure provided by the present invention; Figure 7Schematic diagram of the structure of the sliding drive device in an embodiment of the refrigerated box body structure provided by the present invention; Figure 8 Schematic diagram of the structure of the humidity adjustment component in an embodiment of the refrigerated box body structure provided by the present invention.

[0019] Explanation of reference numerals: 100, box body; 110, partition; 120, refrigerating chamber; 130, storage chamber; 140, return air hole; 200, air duct; 210, air outlet hole; 211, shunt net; 220, induced draft fan; 300, temperature and humidity sensor; 400, first air volume adjustment component; 410, first baffle; 420, rotation drive device; 421, first gear; 422, first rack; 423, first connecting piece; 424, first oil chamber; 4241, first oil chamber A; 4242, first oil chamber B; 425, first sealing ring; 426, first spring member; 500, second air volume adjustment component; 510, second baffle; 511, ventilation hole; 512, third rack; 520, sliding drive device; 521, second gear; 522, second rack; 523, second connecting piece; 524, second oil chamber; 5241, second oil chamber A; 5242, second oil chamber B; 525, second sealing ring; 526, second spring member; 527, third gear; 600, humidity adjustment component; 610, water storage tank; 630, dehumidification pipe; 631, first water pump; 650, humidification pipe; 651, second water pump; 700, oil supply device; 710, oil storage tank; 720, oil pump; 730, oil pipeline; The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0020] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described ones are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, it should be noted that in the present invention, the descriptions involving "first", "second", etc. are only for descriptive purposes, and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] In the prior art, a refrigerated box body is generally partitioned by a partition into a refrigeration chamber for placing a refrigeration unit and a storage chamber for storing fruits and vegetables. By allowing the cold air generated by the refrigeration unit to flow into the storage chamber, the fruits and vegetables in the storage chamber are refrigerated and preserved. The above refrigerated box body structure cannot evenly distribute the cooling area of the cold air, resulting in uneven temperature and humidity in the storage chamber, and thus poor refrigeration and preservation effects of the fruits and vegetables.

[0024] To solve the above technical problems, the present invention proposes a refrigerated box body structure.

[0025] Please refer to Figures 1 to 2 , in an embodiment of the present invention, the refrigerated box body structure includes: A box body main body 100, the interior of the box body main body 100 is partitioned into a refrigeration chamber 120 and a storage chamber 130 by a partition 110; a refrigeration unit (not shown in the drawings) for generating cold air is provided in the refrigeration chamber 120, and the storage chamber 130 is for placing fruits and vegetables to be transported (not shown in the drawings); An air duct 200, the air inlet end of the air duct 200 is communicated with the refrigeration chamber 120, and the air outlet end of the air duct 200 is communicated with the storage chamber 130, so that cold air can flow from the refrigeration chamber 120 to the storage chamber 130 through the air duct 200; wherein a plurality of air outlet holes 210 are provided at the air outlet end of the air duct 200, the plurality of air outlet holes 210 are arranged in a linear array along the length direction of the storage chamber 130, and the aperture of the air outlet holes 210 gradually increases in the direction away from the refrigeration chamber 120.

[0026] The technical solution of the present invention sets an air duct 200, wherein the air inlet end and the air outlet end of the air duct 200 are respectively communicated with the refrigeration chamber 120 and the storage chamber 130, so that the cold air generated by the refrigeration unit can flow from the refrigeration chamber 120 to the storage chamber 130 through the air duct 200, thereby refrigerating and preserving the fruits and vegetables placed in the storage chamber 130; A plurality of air outlet holes 210 are provided at the air outlet end of the air duct 200. The plurality of air outlet holes 210 are arranged in a linear array along the length direction of the storage chamber 130, and the aperture of the air outlet holes 210 gradually increases in the direction away from the refrigerating chamber 120. This is because after the cold air flows out of the refrigerating chamber 120, its temperature is relatively low and the flow rate is relatively fast. If the aperture of the air outlet holes 210 close to the refrigerating chamber 120 is too large at this time, a large amount of cold air will quickly flow out of the air outlet holes 210 close to the refrigerating chamber 120 into the storage chamber 130, resulting in a greater outflow of cold air from the storage chamber 130 close to the refrigerating chamber 120 than that from the storage chamber 130 far from the refrigerating chamber 120, that is, the cooling area cannot be effectively and evenly distributed. Based on the above considerations, in the present invention, the aperture of the air outlet holes 210 is designed to gradually increase in the direction away from the refrigerating chamber 120. On the one hand, this makes the flow rate of the cold air moderate. On the other hand, the outflow of cold air in each area of the storage chamber 130 is approximately the same, so as to ensure the effective and uniform distribution of the cooling area of the cold air, avoid the situation of uneven temperature and humidity in some areas of the storage chamber 130, and further ensure the refrigeration and preservation effect of fruits and vegetables.

[0027] It can be understood that according to the principle of fluid mechanics, in a duct, the smaller the aperture, the faster the flow rate of the air flow; at the same time, since heat exchange occurs during the flow of cold air in the air duct 200, the temperature of the cold air rises with the increase of the flow distance, that is, the temperature of the cold air at the air outlet holes 210 farther from the refrigerating chamber 120 is higher, and the temperature of the cold air at the air outlet holes 210 closer to the refrigerating chamber 120 is lower. In order to ensure the effective and uniform distribution of the cooling area of the cold air, in this embodiment, the aperture of the air outlet holes 210 is designed to gradually increase; specifically, the aperture of the air outlet holes 210 closest to the refrigerating chamber 120 is the smallest and the aperture of the air outlet holes 210 farthest from the refrigerating chamber 120 is the largest; in this way, it can be ensured that on the side close to the refrigerating chamber 120, the cold air flows out at a higher flow rate and a lower temperature, and on the side far from the refrigerating chamber 120, the cold air flows out at a lower flow rate and a higher temperature, which helps to control the flow rate of the cold air, ensure that the cold air flow rate is moderate, ensure the uniform distribution of the cold air, and effectively avoid the situation of overcooling or overheating in some areas of the storage chamber 130. Through the above structure, the flow rate and distribution of the cold air can be accurately controlled, which can ensure that the cold air evenly covers the entire storage chamber 130, thereby improving the refrigeration efficiency; in addition, the optimized air flow reduces unnecessary energy waste, enables the cold air in the storage chamber 130 to be more efficiently transferred to each area, reduces the burden on the refrigeration system, and saves energy. In addition, it can also reduce temperature fluctuations and ensure the quality and freshness of fruits and vegetables during transportation.

[0028] Further, referring to Figures 1 to 2, a draft fan 220 is provided at the air inlet end of the air duct 200; under the driving action of the draft fan 220, cold air flows from the refrigerating chamber 120 to the storage chamber 130; with such a setting, the draft fan 220 is used as the power source, so that the cold air generated by the refrigeration unit can efficiently flow from the refrigerating chamber 120 to the storage chamber 130 to preserve and refrigerate the fruits and vegetables in the storage chamber 130, thereby ensuring the smooth implementation of the technical solution of the present application.

[0029] Further, referring to the attached Figure 3 , the air outlet hole 210 has a conical structure, the end with a relatively small aperture of the air outlet hole 210 communicates with the air duct 200, and the end with a relatively large aperture of the air outlet hole 210 communicates with the storage chamber 130. With such a setting, the air flow pressure when the cold air flows out of the air outlet hole 210 is reduced through the conical air outlet hole 210, so that the cold air can flow to the surface of the fruits and vegetables in a gentle manner, avoiding the fruits and vegetables from being frozen due to excessive air flow pressure of the cold air.

[0030] Further, referring to the attached Figure 3 , a flow dividing net 211 is provided at the air outlet hole 210; with such a setting, in order to further improve the cooling effect and avoid the cold air blowing directly on the fruits and vegetables and causing frostbite, the flow dividing net 211 is installed at the air outlet hole 210 in this embodiment. The flow dividing net 211 can effectively disperse the cold air flow, so that the cold air evenly enters the interior of the storage chamber 130, avoiding the local cold air directly hitting the surface of the fruits and vegetables and reducing the excessive cooling of the cold air to the fruits and vegetables. Through this series of designs, the temperature and humidity conditions in the storage chamber 130 are more evenly distributed, thereby ensuring the quality and freshness of the fruits and vegetables during transportation.

[0031] Further, referring to the attached Figure 1 , the air duct 200 is provided at the top of the box body 100, and an air return hole 140 is provided at the bottom of the partition 110; since the cold air is heavy in mass, it adopts a flowing manner from top to bottom; the air duct 200 is provided at the top of the box body 100, so that the cold air flows from top to bottom to the surface of the fruits and vegetables for refrigeration and preservation; the cold air at the bottom flows back to the refrigerating chamber 120 through the air return hole 140 to form a cold air circulation loop.

[0032] As a preferred solution of the above embodiment, referring to Figures 1 to 4, a storage room 130 is provided with a temperature and humidity sensor 300, and a first air volume regulating component 400 and / or a second air volume regulating component 500 are arranged inside the air duct 200. The first air volume regulating component 400 is arranged at the air inlet end of the air duct 200, and the second air volume regulating component 500 is arranged at the air outlet end of the air duct 200; the temperature and humidity sensor 300 is electrically connected to the first air volume regulating component 400 and the second air volume regulating component 500. With such a setting, the temperature and humidity data of the storage room 130 are monitored in real time by the temperature and humidity sensor 300, and the air volume of the cold air flowing through the air duct 200 is adjusted by the first air volume regulating component 400 and / or the second air volume regulating component 500 according to the temperature and humidity data, so as to ensure that the fruits and vegetables in the storage room 130 are in suitable temperature and humidity conditions. The above-mentioned first air volume regulating component 400 and the second air volume regulating component 500 can be set alternatively or simultaneously, and the present application does not make specific restrictions on this.

[0033] Specifically, referring to the appendix Figure 5 , the first air volume regulating component 400 includes a first baffle 410 and a rotation driving device 420. The first baffle 410 is rotatably connected inside the air duct 200; the driving end of the rotation driving device 420 is connected to the first baffle 410, so that the first baffle 410 can rotate around its own axis, thereby adjusting the passing opening area of the air duct 200; the rotation driving device 420 adopts hydraulic transmission. With such a setting, the passing opening area of the air duct 200 is adjusted by rotating and adjusting the first baffle 410, so as to achieve the purpose of adjusting the air volume of the cold air; it can be understood that when the first baffle 410 rotates to be parallel to the flowing direction of the cold air, it can be regarded that the first baffle 410 does not block the cold air, and at this time the cold air can all pass through the air duct 200, reaching the state of the maximum air volume; when the first baffle 410 rotates to be perpendicular to the flowing direction of the cold air, it can be regarded that the first baffle 410 completely blocks the cold air, and at this time the cold air cannot pass through the air duct 200, reaching the state of the minimum air volume; the above structure can achieve the purpose of effectively controlling the temperature and humidity.

[0034] More specifically, the rotation driving device 420 includes a first gear 421 and a first rack 422 that are meshed and connected to each other. The first gear 421 is fixedly connected to the first baffle 410 through a first connecting member 423 arranged coaxially. The opposite ends of the first rack 422 are respectively slidably connected in the first oil chambers 424. A first oil body (not shown in the drawings) is hermetically filled between the end of the first rack 422 and the first oil chambers 424. By adjusting the volume ratio between the first oil bodies in the two first oil chambers 424, the first rack 422 is driven to slide relative to the first oil chambers 424, and then the first gear 421 is driven to rotate. For the convenience of understanding, the two first oil chambers 424 are respectively named the first oil chamber A 4241 and the first oil chamber B 4242. The first end of the first rack 422 is slidably connected in the first oil chamber A 4241, and the second end of the first rack 422 is slidably connected in the first oil chamber B 4242. When the volume of the first oil body in the first oil chamber A 4241 increases and the volume of the first oil body in the first oil chamber B 4242 decreases, at this time, the first rack 422 is pushed by the first oil body in the first oil chamber A 4241 and slides in the direction of the first oil chamber B 4242. During the sliding process of the first rack 422, since the first rack 422 is meshed and connected to the first gear 421, the first gear 421 will be driven to rotate. Then, the first gear 421 drives the first baffle 410 to rotate through the first connecting member 423, so as to achieve the purpose of controlling the forward rotation of the first baffle 410. Similarly, when the volume of the first oil body in the first oil chamber A 4241 decreases and the volume of the first oil body in the first oil chamber B 4242 increases, the first baffle 410 will be controlled to rotate in the reverse direction. Thus, the purpose of rotating and controlling the first baffle 410 is achieved.

[0035] It can be understood that, in order to ensure that the first oil body can be hermetically filled between the end of the first rack 422 and the first oil chambers 424, a first sealing ring 425 is arranged at the end of the first rack 422. The outer wall of the first sealing ring 425 is in sealed contact with the inner wall of the first oil chambers 424. In this way, it is ensured that the first oil body can be hermetically filled between the end of the first rack 422 and the first oil chambers 424. At the same time, when the first rack 422 moves relative to the first oil chambers 424, the first oil body will not leak from the gap between the first sealing ring 425 and the first oil chambers 424 to the side of the non-free end of the first rack 422.

[0036] Furthermore, a first spring member 426 is arranged between the first sealing ring 425 and the first oil chambers 424. With such an arrangement, it is ensured that the first rack 422 can smoothly slide relative to the first oil chambers 424 under the dual action of the driving force of the first oil body and the elastic force of the first spring member 426, and the structure is simple and practical.

[0037] Specifically, refer toFigures 6 to 7 , the second air volume adjustment component 500 includes a second baffle 510 and a sliding drive device 520. The second baffle 510 is slidably connected to the inside of the box body 100, and the second baffle 510 penetrates through a plurality of air outlet holes 210; a plurality of ventilation holes 511 are formed in the second baffle 510, and the ventilation holes 511 correspond to the air outlet holes 210 one by one; the driving end of the sliding drive device 520 is connected to the second baffle 510, so that the second baffle 510 can slide relative to the box body 100, and the opening area of the air outlet holes 210 is adjusted by adjusting the communication area between the air outlet holes 210 and the ventilation holes 511; wherein the sliding drive device 520 adopts hydraulic transmission. With such a setting, by sliding and adjusting the second baffle 510, the opening area of the air outlet holes 210 is adjusted, so as to achieve the purpose of adjusting the air volume of the cold air; it can be understood that when the second baffle 510 slides to completely overlap with the air outlet holes 210 and the ventilation holes 511, it can be regarded that the second baffle 510 does not block the cold air. At this time, the cold air can all pass through the air outlet holes 210, reaching the state of the maximum air volume; when the second baffle 510 slides to completely non-overlap with the air outlet holes 210 and the ventilation holes 511, it can be regarded that the second baffle 510 completely blocks the cold air. At this time, the cold air cannot pass through the air outlet holes 210, reaching the state of the minimum air volume; through the above structure, the purpose of effectively controlling the temperature and humidity can be achieved.

[0038] More specifically, the sliding driving device 520 includes a second gear 521 and a second rack 522 that are meshed and connected to each other. The second gear 521 is fixedly connected to a third gear 527 through a second connecting member 523 arranged coaxially. A third rack 512 is fixedly connected to the end of the second baffle 510, and the third rack 512 is meshed and connected to the third gear 527. The opposite ends of the second rack 522 are respectively slidably connected in a second oil cavity 524. A second oil body is hermetically filled between the end of the second rack 522 and the second oil cavity 524. By adjusting the volume ratio between the second oil bodies in the two second oil cavities 524, the second rack 522 is driven to slide relative to the second oil cavity 524, and then the second gear 521 is driven to rotate. For the convenience of understanding, the two second oil cavities 524 are respectively named a second oil cavity A 5241 and a second oil cavity B 5242. The first end of the second rack 522 is slidably connected in the second oil cavity A 5241, and the second end of the second rack 522 is slidably connected in the second oil cavity B 5242. When the volume of the second oil body in the second oil cavity A 5241 increases and the volume of the second oil body in the second oil cavity B 5242 decreases, at this time, the second rack 522 is pushed by the second oil body in the second oil cavity A 5241 to slide in the direction of the second oil cavity B 5242. During the sliding process of the second rack 522, since the second rack 522 is meshed and connected to the second gear 521, the second gear 521 will be driven to rotate. Then, the second gear 521 drives the third gear 527 to rotate through the second connecting member 523. Also, since the third gear 527 is meshed and connected to the third rack 512, when the third gear 527 rotates, it will drive the third rack 512 to slide along its own rack direction to achieve the purpose of controlling the forward sliding of the second baffle 510. Similarly, when the volume of the second oil body in the second oil cavity A 5241 decreases and the volume of the second oil body in the second oil cavity B 5242 increases, the reverse sliding of the second baffle 510 will be controlled, thereby achieving the purpose of controlling the sliding of the second baffle 510.

[0039] It can be understood that, in order to ensure that the second oil body can be hermetically filled between the end of the second rack 522 and the second oil cavity 524, a second sealing ring 525 is provided at the end of the second rack 522, and the outer wall of the second sealing ring 525 is in sealing contact with the inner wall of the second oil cavity 524. In this way, it is ensured that the second oil body can be hermetically filled between the end of the second rack 522 and the second oil cavity 524. At the same time, when the second rack 522 moves relative to the second oil cavity 524, the second oil body will not leak from the gap between the second sealing ring 525 and the second oil cavity 524 to the non-free end side of the second rack 522.

[0040] Furthermore, a second spring member 526 is provided between the second sealing ring 525 and the second oil chamber 524; with this arrangement, it is ensured that the second rack 522 can smoothly slide relative to the second oil chamber 524 under the dual action of the driving force of the second oil body and the elastic force of the second spring member 526, and the structure is simple and practical.

[0041] In other embodiments, referring to the attached Figure 4 , there are a plurality of air outlet ends provided at the air outlet end of the air duct 200, and the plurality of air outlet ends are arranged in a linear array along the width direction of the storage chamber 130. Each air outlet end is provided with the above-mentioned second air volume adjustment assembly 500; the second air volume adjustment assemblies 500 at each air outlet end can be uniformly adjusted or individually adjusted, and the present application does not make specific limitations on this. With this arrangement, air outlet holes 210 are distributed along both the length direction and the width direction in the storage chamber 130, so that the cold air can fully cover the entire space of the storage chamber 130.

[0042] And, since the above-mentioned rotary drive device 420 and the sliding drive device 520 both adopt hydraulic transmission as the drive mechanism, compared with motor drive, hydraulic transmission has stability at low temperatures and can more effectively avoid problems such as motor failure or restart due to low-temperature environments. Hydraulic transmission transmits force through the pressure of hydraulic oil (the first oil body and the second oil body) to drive the gear-rack mechanism (i.e., the first gear 421 and the first rack 422, the second gear 521 and the second rack 522, the third gear 527 and the third rack 512) to open or close the air duct 200 and the air outlet holes 210. At the same time, the gear-rack mechanism has good transmission efficiency, high precision, and can provide stable torque output. This enables the first air volume adjustment assembly 400 and the second air volume adjustment assembly 500 to still maintain efficient operation under different environmental conditions, especially in low-temperature situations, without being affected by the performance attenuation of the motor. It can be understood that traditional motor drive may have problems of failure or slow response in low-temperature environments, but hydraulic transmission depends on the change of oil body pressure rather than current, so it can operate stably in extremely cold environments. Ensure that even in the case of insufficient power, the system can still freely adjust the cold air flow.

[0043] In this embodiment, referring to the attached Figure 8, the above-mentioned rotation driving device 420 and the sliding driving device 520 share a set of oil supply devices 700. The oil supply device 700 includes an oil storage tank 710 and an oil pump 720. The oil in the oil storage tank 710 is transmitted to the rotation driving device 420 and the sliding driving device 520 through the oil pipeline 730 by the oil pump 720 to ensure the effective operation of the rotation driving device 420 and the sliding driving device 520. At the same time, the rotation driving device 420 and the sliding driving device 520 sharing a set of oil supply devices 700 can also reduce the complexity of the structural arrangement.

[0044] As a preferred solution of the above embodiment, refer to the attached Figure 8, the refrigeration box structure includes a humidity adjustment component 600, which is electrically connected to the temperature and humidity sensor 300; such a configuration is performed because humidity plays an important role in the refrigeration and cooling process. The temperature in the storage chamber 130 is taken away by the air flow, and the evaporation heat of the moisture in the cold air helps to reduce the temperature in the storage chamber 130. In a high humidity environment, the moisture in the air has a higher heat exchange capacity, which can help maintain the fluidity and stability of the cold air while reducing the temperature. Therefore, when the humidity is appropriate, it helps to evenly distribute the temperature, thereby improving the efficiency of cooling. However, excessive humidity may also bring certain negative effects. Excessive humidity will cause the air to be saturated, reduce the heat conduction capacity of the air, make the cold air flow unsmooth, and thus affect the cooling speed; in some extreme cases, excessive humidity may also cause frost or ice, affecting the normal operation of the refrigeration system. And too low humidity will cause the moisture on the surface of fruits and vegetables to evaporate rapidly, resulting in water loss of fruits and vegetables. This water loss will not only make the surface of fruits and vegetables dry, shrink, or even crack, but also affect the taste and appearance of fruits and vegetables. For example, leafy vegetables and fruits such as strawberries have a high demand for humidity. Too low humidity will cause them to dry up and rot quickly, reducing their market value. In addition, too low humidity will also cause cracks and cracks on the surface of fruits and vegetables, which provides a way for microorganisms such as bacteria and mold to invade, thereby accelerating the decay process. For some perishable fruits and vegetables, such as apples, grapes and citrus, too low humidity will significantly shorten their shelf life and affect their storage effect. Too low humidity not only affects the quality of fruits and vegetables, but also has an adverse effect on the refrigerated box itself. When the humidity is too low, there is less moisture in the air and the cold air flows unevenly, which may cause uneven distribution of cold air in the refrigerated box and reduce the cooling efficiency. In addition, too low humidity may also cause condensation problems inside the refrigerated box, causing frost accumulation, and even causing equipment blockage or failure, thus affecting the normal operation of the entire refrigeration system. Therefore, maintaining appropriate humidity not only helps the preservation of fruits and vegetables, but also ensures the efficient operation of the refrigerated box. Accurate control of humidity is essential for cold chain transportation and storage. Based on the above reasons, it is very important to adjust the humidity by using the humidity adjustment component 600 according to the humidity information displayed by the temperature and humidity sensor 300, and to ensure that the fruits and vegetables are always under suitable humidity conditions by reasonably controlling the humidity level.

[0045] Specifically, the humidity adjustment component 600 includes a water storage tank 610, a dehumidifying device, and a humidifying device. The water inlet end of the water storage tank 610 is connected to the dehumidifying device through a dehumidifying pipe 630. A first water pump 631 is provided on the dehumidifying pipe 630, and the first water pump 631 is used to transfer the moisture absorbed by the dehumidifying device to the water storage tank 610. The water outlet end of the water storage tank 610 is connected to the humidifying device through a humidifying pipe 650. A second water pump 651 is provided on the humidifying pipe 650, and the second water pump 651 is used to transfer the stored moisture in the water storage tank 610 to the humidifying device. With such a setting, in order to ensure that the fruits and vegetables are always in a suitable humidity environment during cold chain transportation, the internal humidity of the refrigerated box is monitored in real time by the temperature and humidity sensor 300. When the humidity reaches the set optimal level, the humidifying device is turned off to avoid excessive moisture accumulation. When the humidity reaches an excessive level, the dehumidifying device is used to absorb the excessive moisture. When the moisture absorbed by the dehumidifying device reaches a certain amount, the first water pump 631 will start to transfer the moisture through the dehumidifying pipe 630 to the water storage tank 610. These transferred moisture will be used for subsequent humidification needs to ensure the balance of humidity conditions during the storage of fruits and vegetables, and at the same time, the recycling of water resources can be realized, achieving the purpose of energy conservation and environmental protection.

[0046] Among them, the humidifying device and the dehumidifying device can be arranged in the air duct 200, or the return air hole, or the storage room 130, or the refrigeration room 120. The present application does not make specific restrictions on this.

[0047] In other embodiments, the humidifying device and the second water pump 651 may not be provided. By opening the valve at the water outlet end of the water storage tank 610, the moisture in the water storage tank 610 can drip along the humidifying pipe 650 due to its own gravity and disperse with the cold air, which can also achieve the purpose of increasing the air humidity.

[0048] As a preferred solution of the above embodiment, the refrigeration unit includes a plurality of ice boxes (not shown in the drawings); among them, the ice boxes are pre-frozen during the low valley period of the peak-valley electricity price. With such a setting, the ice boxes are used as backup refrigerant media to maintain the low temperature environment in the refrigeration room 120 and generate cold air through the ice boxes. At the same time, the ice boxes can maintain low temperature for a short time without relying on external power, reducing the demand for fuel or electricity during the cold chain transportation of fruits and vegetables. In addition, using ice boxes for refrigeration has lower initial investment costs and maintenance costs, making the structure of the refrigeration room 120 simpler and reducing the dependence on complex mechanical systems. It also avoids the use of fluorine-containing refrigerants in the refrigerator, reducing potential environmental pollution. At the same time, the temperature during the phase change refrigeration process of the ice boxes is stable, avoiding temperature fluctuations caused by the switching of the refrigerator. In addition, the ice boxes can be flexibly replaced, reducing complex technical operations in traditional refrigerated trucks.

[0049] Among them, the ice box has a shell made of plastic PE material or HDPE material. These materials are hard and have good plasticity, which can ensure the durability and stability of the ice box during use; its content is a refrigerant, usually prepared from high-tech biological materials or polymer phase change cold storage materials, which is clean and non-toxic and has excellent cold storage performance; the ice box has excellent cold storage performance, and its effective cold capacity in use is 3 to 5 times that of ice, and can even reach 6 times that of ice of the same volume, and can maintain a low temperature environment for a long time. At the same time, the ice box has less deformation after freezing, can be reused, and has good plasticity; the ice box is widely used in the fields of cold storage and power saving of refrigerators, cold storage and preservation of food and medicine, and low-temperature cold chain turnover transportation, etc.

[0050] This embodiment also discloses a refrigerated truck, including the refrigerated box body structure of any one of the above embodiments. For the specific structure of the refrigerated box body structure, reference may be made to the above embodiments. Since this refrigerated truck adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.

[0051] It should be noted that the other contents of the refrigerated box body structure and the refrigerated truck disclosed in the present invention are prior arts and will not be elaborated here.

[0052] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All applications directly or indirectly using the present invention in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A refrigerated box structure, characterized in that, The refrigerated box body structure includes: A box body main body, the interior of which is divided into a refrigeration chamber and a storage chamber by a partition; a refrigeration unit for generating cold air is arranged in the refrigeration chamber; An air duct, the air inlet end of which is communicated with the refrigeration chamber, and the air outlet end of which is communicated with the storage chamber, so that the cold air can flow from the refrigeration chamber to the storage chamber through the air duct; wherein a plurality of air outlet holes are arranged at the air outlet end of the air duct, and the plurality of air outlet holes are arranged in a linear array along the length direction of the storage chamber, and the aperture of the air outlet holes gradually increases in the direction away from the refrigeration chamber.

2. The refrigerated box body structure according to claim 1, characterized in that: An induced draft fan is arranged at the air inlet end of the air duct; under the driving action of the induced draft fan, the cold air flows from the refrigeration chamber to the storage chamber; And / or, the air outlet holes are in a conical structure, the relatively small-diameter end of the air outlet holes is communicated with the air duct, and the relatively large-diameter end of the air outlet holes is communicated with the storage chamber.

3. The refrigerated box body structure according to claim 1, characterized in that: A temperature and humidity sensor is arranged in the storage chamber, and a first air volume adjustment component and / or a second air volume adjustment component are arranged inside the air duct, wherein the first air volume adjustment component is arranged at the air inlet end of the air duct, and the second air volume adjustment component is arranged at the air outlet end of the air duct; the temperature and humidity sensor is electrically connected to the first air volume adjustment component and the second air volume adjustment component.

4. The refrigerated box body structure according to claim 3, wherein: The first air volume adjustment component includes a first baffle and a rotation driving device, and the first baffle is rotatably connected to the inside of the air duct; the driving end of the rotation driving device is connected to the first baffle, so that the first baffle can rotate around its own axis, thereby adjusting the passing opening area of the air duct; Wherein the rotation driving device adopts hydraulic transmission.

5. The refrigerated box body structure according to claim 4, characterized in that: The rotation driving device includes a first gear and a first rack that are meshed and connected to each other, and the first gear is fixedly connected to the first baffle through a first connecting piece arranged coaxially; the opposite ends of the first rack are respectively slidably connected in a first oil cavity, wherein a first oil body is hermetically filled between the end of the first rack and the first oil cavity, and by adjusting the volume ratio between the first oil bodies in the two first oil cavities, the first rack is driven to slide relative to the first oil cavity, and further the first gear is driven to rotate.

6. The refrigerated box body structure according to claim 3, characterized in that: The second air volume adjustment component includes a second baffle and a sliding driving device, the second baffle is slidably connected to the inside of the box body main body, and the second baffle penetrates through a plurality of the air outlet holes; a plurality of ventilation holes are formed in the second baffle, and the ventilation holes correspond to the air outlet holes one by one; the driving end of the sliding driving device is connected to the second baffle, so that the second baffle can slide relative to the box body main body, and the opening area of the air outlet holes is adjusted by adjusting the communication area between the air outlet holes and the ventilation holes; Wherein the sliding driving device adopts hydraulic transmission.

7. The refrigerated box body structure according to claim 6, characterized in that: The sliding drive device includes a second gear and a second rack that are meshed and connected to each other. The second gear is fixedly connected to a third gear through a coaxially arranged second connecting member. The end of the second baffle is fixedly connected to a third rack, and the third rack is meshed and connected to the third gear. The opposite ends of the second rack are respectively slidably connected in a second oil chamber, and a second oil body is hermetically filled between the end of the second rack and the second oil chamber. By adjusting the volume ratio between the second oil bodies in the two second oil chambers, the second rack is driven to slide relative to the second oil chamber, and further the second gear is driven to rotate.

8. The refrigerated box body structure according to claim 3, characterized in that: The refrigerated box body structure includes a humidity adjustment component, and the humidity adjustment component is electrically connected to the temperature and humidity sensor; The humidity adjustment component includes a water storage device, a dehumidification device, and a humidification device. The water inlet end of the water storage device is connected to the dehumidification device through a dehumidification pipe, and a first water pump is arranged on the dehumidification pipe. The first water pump is used to transfer the water absorbed by the dehumidification device to the water storage device. The water outlet end of the water storage device is connected to the humidification device through a humidification pipe, and a second water pump is arranged on the humidification pipe. The second water pump is used to transfer the stored water in the water storage device to the humidification device.

9. The refrigerated box body structure according to claim 1, wherein: The refrigeration unit includes a plurality of ice boxes; and the ice boxes are pre-frozen during the low valley period of the time-of-use electricity price with peak and valley electricity prices.

10. A refrigerated truck, characterized in that: The refrigerated truck includes the refrigerated box body structure according to any one of claims 1 to 9.

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