Refrigerated refrigeration system and refrigerated vehicle

Abstract

The utility model provides a kind of refrigeration system and refrigerated car, belong to cold chain transport technical field, including refrigerating unit, cold storage equipment and air distribution mechanism, and all are at least two;Refrigerating unit has air inlet channel and two air outlet channels, air inlet channel is connected with the inside of compartment;Cold storage equipment is connected with an air outlet channel and is equipped with air inlet and air outlet, air inlet is attached to the bottom of compartment and is arranged, air outlet is attached to the inner wall of compartment and is arranged;Air distribution mechanism is installed in the top of compartment and is arranged along the length direction of compartment;Air distribution mechanism has air outlet, air distribution mechanism is connected with another air outlet channel.The refrigeration system provided by the utility model reduces the cooling time of initial refrigeration stage of compartment by the combined use of refrigerating unit and cold storage equipment, and the air outlet mode of air distribution mechanism and cold storage equipment makes the cooling of compartment uniform;Meanwhile, the temperature rise phenomenon in compartment caused by defrosting of refrigerating unit is eliminated, and the cooling quality of goods is improved.

Description

Technical Field

[0001] This utility model belongs to the field of cold chain transportation technology, and more specifically, it relates to a refrigeration system and a refrigerated vehicle. Background Technology

[0002] In modern logistics systems, cold chain transportation is a core link in ensuring the quality of temperature-sensitive goods such as fresh food and pharmaceutical products. Its technological reliability directly determines the efficiency and safety of cargo distribution. Currently, cold chain transport vehicles experience slow cooling speeds during the initial refrigeration phase. Furthermore, the frequent opening of the compartment doors during loading and unloading causes a rapid temperature rise inside the compartment, affecting the refrigerated quality of the goods. Simultaneously, the additional heat generated during the defrosting process of the refrigeration unit further exacerbates temperature fluctuations within the compartment, also impacting cargo quality. While refrigeration units in refrigerated trucks generate low-temperature cold air and distribute it throughout the compartment, traditional distribution methods result in low uniformity of the cold air within the compartment, further directly affecting the refrigeration effect on the goods. Utility Model Content

[0003] The purpose of this utility model is to provide a refrigeration system and a refrigerated truck to solve the technical problems of long refrigeration time and low uniformity of cold air in the compartment of the refrigerated truck, which result in poor cooling effect of goods.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a refrigeration system, comprising: At least two refrigeration units are provided, each of which has an air inlet channel and two air outlet channels, the air inlet channel being used to connect with the interior of the carriage. At least two cold storage devices are provided, each corresponding to one of the refrigeration units. The cold storage device is connected to one of the air outlet channels of the corresponding refrigeration unit for absorbing cold air. The cold storage device is provided with an air inlet and an air outlet connected to the carriage, with the air inlet located close to the bottom of the carriage and the air outlet located close to the inner wall of the carriage. There are at least two air distribution mechanisms, each corresponding to one of the refrigeration units; the air distribution mechanism is used to be installed on the top of the carriage and is arranged along the length of the carriage; the air distribution mechanism has an air outlet with the outlet facing downwards, and the air distribution mechanism is connected to another air outlet channel of the corresponding refrigeration unit.

[0005] In one possible implementation, both refrigeration units are located outside the carriage and fixed to the front wall of the carriage; both cold storage devices are located inside the carriage and fixed to the carriage floor and the front wall of the carriage; the refrigeration units also include at least two air inlet chambers opened on the front wall of the carriage, and both air outlet ducts are connected to the corresponding air inlet chambers; one end of each air distribution mechanism is connected to the front wall of the carriage.

[0006] In one possible implementation, the front wall of the carriage is provided with at least two sets of openings connected to the air inlet cavity and at least two sets of ventilation pipes connected to the air inlet cavity on one side inside the carriage; the two sets of openings and the two sets of ventilation pipes are the four air outlet channels on the two refrigeration units, and the two sets of openings are connected to the two air distribution mechanisms, and the two sets of ventilation pipes are connected to the two cold storage devices.

[0007] In one possible implementation, multiple cold storage devices are integrated and installed in a box inside the carriage, the box being connected to the front wall and floor of the carriage; the exhaust vent is located on the upper part of the box near the front wall of the carriage, and the exhaust vent is connected to the interior of the box; the air inlet is located on the side of the box away from the front wall of the carriage, and a fan is installed on the air inlet.

[0008] In one possible implementation, the cold storage device further includes a plurality of vertical ducts fixedly installed on the front wall of the carriage, the plurality of vertical ducts being arranged in parallel at intervals, and the lower ends of the ducts being connected to the exhaust vents.

[0009] In one possible implementation, the refrigeration system further includes a frame platform installed on the front side of the carriage and a housing installed on the frame platform, with multiple refrigeration units located inside the housing; the air inlet channel is connected to the housing, and multiple ventilation slots are provided on the floor of the carriage below the housing, and the ventilation slots are connected to the interior of the housing; the floor of the housing is provided with a through slot for connecting the carriage and the housing.

[0010] In one possible implementation, there are two refrigeration units, two cold storage devices, and two air distribution mechanisms. The two refrigeration units are arranged vertically side by side, the two cold storage devices are arranged horizontally side by side, and the two air distribution mechanisms are arranged parallel and spaced apart along the width of the carriage.

[0011] In one possible implementation, the air distribution mechanism includes several elongated channels arranged at intervals, each elongated channel having an air collection chamber, and the air outlets being opened on the outer wall of the elongated channels and connected to the air collection chambers; one end of each elongated channel is connected to another air outlet channel; there are multiple air outlets, arranged in multiple groups; the multiple groups of air outlets are arranged circumferentially at intervals, and multiple air outlets in the same group are arranged along the length direction of the elongated channels.

[0012] In one possible implementation, a plurality of air intake pipes are fixedly installed in the elongated channel, and the plurality of air intake pipes correspond one-to-one with the plurality of air outlets; the lower end of the air intake pipe is connected to the air outlet, and the air intake pipe and the air outlet are arranged coaxially.

[0013] The beneficial effects of the refrigeration system provided by this utility model are as follows: Compared with the prior art, in this refrigeration system, the refrigeration unit first charges the cold storage equipment to bring it to a fully cooled state. At the beginning of the refrigeration operation, due to the large load, the cold storage equipment is also activated simultaneously with the refrigeration unit. The fan on the cold storage equipment turns on and provides a large cooling capacity, thereby rapidly reducing the temperature inside the carriage and ensuring a good cooling effect. Specifically, the refrigeration unit draws in air from the carriage through the air inlet duct, cools the air, and then delivers the resulting low-temperature cold air through two outlet ducts to the corresponding cold storage equipment and air distribution mechanism. On one hand, the cold storage equipment receives and stores the cold air, while simultaneously, the cold air enters from the air inlet at the bottom of the cold storage equipment, circulates internally, and exits from the exhaust vent against the inner wall of the carriage, forming a cold air loop along the inner wall of the carriage, rapidly cooling the entire carriage. On the other hand, the air distribution mechanism receives cold air from the other outlet duct and delivers it from top to bottom into the carriage through the top-down exhaust vent, covering the middle of the carriage and the area above the cargo. This overlaps with the cold air loop formed by the cold storage equipment at the bottom and inner wall, achieving three-dimensional coverage of the cold air within the carriage, further improving the cooling effect on the cargo. During operation, multiple refrigeration units are defrosted in staggered shifts; that is, while one refrigeration unit is defrosting, the others continue to operate, offsetting the extra heat generated during the defrosting process and preventing significant temperature fluctuations within the carriage. In this way, the combined use of refrigeration units and cold storage equipment reduces the cooling time during the initial cooling stage of the carriage, and the air distribution mechanism and the air outlet of the cold storage equipment ensure uniform cooling inside the carriage; at the same time, it eliminates the temperature rise inside the carriage caused by the defrosting of the refrigeration unit, thus improving the cooling quality of the goods.

[0014] Another objective of this invention is to provide a refrigerated truck, including any of the above-mentioned refrigeration systems.

[0015] This utility model provides a refrigerated truck. By adopting a refrigeration system, the combination of refrigeration unit and cold storage equipment reduces the cooling time of the initial cooling stage of the truck compartment. Furthermore, the air distribution mechanism and the air outlet method of the cold storage equipment ensure uniform cooling inside the truck compartment. At the same time, it eliminates the temperature rise inside the truck compartment caused by the defrosting of the refrigeration unit, thereby improving the cooling quality of the goods. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of the refrigeration system installed in the carriage according to an embodiment of the present utility model; Figure 2 Schematic diagram of the refrigeration system provided in the embodiment of this utility model Figure 1 ; Figure 3 Schematic diagram of the refrigeration system provided in the embodiment of this utility model Figure 2 ; Figure 4 Schematic diagram of the structure of the refrigeration unit and cold storage device provided in the embodiments of this utility model Figure 1 ; Figure 5 Schematic diagram of the structure of the refrigeration unit and cold storage device provided in the embodiments of this utility model Figure 2 ; Figure 6 This is a schematic diagram of the structure of the cold storage device provided in the embodiment of the present utility model; Figure 7 A schematic diagram of the connection between the refrigeration unit and the cold storage device provided in this embodiment of the utility model. Figure 1 ; Figure 8 A schematic diagram of the connection between the refrigeration unit and the cold storage device provided in this embodiment of the utility model. Figure 2 ; Figure 9 Schematic diagram of the air distribution mechanism provided in the embodiment of this utility model Figure 1 ; Figure 10 Schematic diagram of the air distribution mechanism provided in the embodiment of this utility model Figure 2 ; Figure 11 Partial schematic diagram of the air distribution mechanism provided in the embodiment of this utility model Figure 1 ; Figure 12 Partial schematic diagram of the air distribution mechanism provided in the embodiment of this utility model Figure 2 .

[0018] The following are the labeling elements in the figure: 10. Refrigeration unit; 11. Air inlet duct; 12. Air outlet duct; 13. Air inlet cavity; 14. Opening; 15. Ventilation duct; 20. Cold storage equipment; 21. Air inlet; 22. Air outlet; 23. Housing; 24. Fan; 25. Vertical duct; 26. Through groove; 27. Cold storage pipe; 30. Air distribution mechanism; 31. Air outlet; 32. Long channel; 33. Air collection cavity; 34. Exhaust duct; 35. Airflow outlet; 40. Chassis platform; 41. Shell; 42. Ventilation slot; 50. Carriage. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Please see Figures 1 to 12The refrigeration system provided by this utility model will now be described. A refrigeration system includes a refrigeration unit 10, a cold storage device 20, and an air distribution mechanism 30. There are at least two refrigeration units 10, each having an air inlet channel 11 and two air outlet channels 12. The air inlet channel 11 is used to connect to the interior of the vehicle compartment 50. There are at least two cold storage devices 20, each corresponding to one of the refrigeration units 10. Each cold storage device 20 is connected to one air outlet channel 12 of its corresponding refrigeration unit 10 for absorbing cold air. The cold storage device 20 is equipped with... It has an air inlet 21 and an air outlet 22 connected to the carriage 50, with the air inlet 21 located close to the bottom of the carriage and the air outlet 22 located close to the inner wall of the carriage 50; there are at least two air distribution mechanisms 30, which correspond one-to-one with the refrigeration unit 10; the air distribution mechanism 30 is used to be installed on the top of the carriage 50 and is arranged along the length of the carriage 50; the air distribution mechanism 30 has an air outlet 31 with the outlet facing downward, and the air distribution mechanism 30 is connected to another air outlet duct 12 of the corresponding refrigeration unit 10.

[0024] The refrigeration system provided by this utility model, compared with the prior art, includes at least two refrigeration units 10, a cold storage device 20 corresponding to each refrigeration unit 10, and an air distribution mechanism 30. Each refrigeration unit 10 is provided with an air inlet channel 11 communicating with the interior of the vehicle compartment 50, and two air outlet channels 12. The air inlet channel 11 can draw air from the vehicle compartment 50 into the refrigeration unit 10 for cooling. The two air outlet channels 12 are respectively connected to the cold storage device 20 and the air distribution mechanism 30 to realize the diversion and utilization of cold air. The cold storage device 20 and one air outlet channel 12 of the refrigeration unit 10 The system is connected and can store cold air when the refrigeration unit 10 is running normally. At the same time, the air inlet 21 of the cold storage device 20 is set close to the bottom of the carriage and the air outlet 22 is set close to the inner wall of the carriage 50. This layout allows cold air to enter the cold storage device 20 from the bottom of the carriage and then be discharged along the inner wall of the carriage 50, forming a cold air loop along the inner wall of the carriage 50. The air distribution mechanism 30 is installed on the top of the carriage 50 and arranged along the length of the carriage 50. Its downward-facing air outlet 31 allows cold air to flow from the top of the carriage 50 from top to bottom, which works in conjunction with the cold air loop formed by the cold storage device 20 to cover all areas of the carriage 50.

[0025] In terms of operation, the refrigeration unit 10 first charges the cold storage device 20 to bring it to full cooling. At the beginning of the refrigeration operation, due to the large load, the cold storage device 20 is also turned on at the same time as the refrigeration unit 10 starts working. The fan 24 on the cold storage device 20 is turned on and provides a large cooling capacity, thereby rapidly reducing the temperature inside the carriage 50 and ensuring a good cooling effect inside the carriage 50. Specifically, the refrigeration unit 10 draws in air from the carriage 50 through the air inlet duct 11, cools the air, and then delivers the resulting low-temperature cold air through two outlet ducts 12 to the corresponding cold storage device 20 and air distribution mechanism 30, respectively. On one hand, the cold storage device 20 receives and stores the cold air, while the cold air enters from the air inlet 21 of the cold storage device 20 near the bottom of the carriage, circulates internally, and is discharged from the exhaust vent 22 near the inner wall of the carriage 50, forming a cold air loop along the inner wall of the carriage 50, rapidly cooling the entire carriage 50. On the other hand, the air distribution mechanism 30 receives cold air from the other outlet duct 12 and delivers the cold air from top to bottom into the carriage 50 through the top-down outlet 31, covering the middle of the carriage 50 and the area above the cargo. This overlaps with the bottom and inner wall cold air loop formed by the cold storage device 20, achieving three-dimensional coverage of the cold air within the carriage 50, further improving the cooling effect on the cargo. During operation, multiple refrigeration units 10 are defrosted in staggered shifts. That is, while one refrigeration unit 10 is defrosting, the others continue to operate, offsetting the extra heat generated during defrosting and preventing significant temperature fluctuations inside the cargo compartment 50. In this way, the combined use of the refrigeration units 10 and the cold storage device 20 reduces the initial cooling time of the cargo compartment 50, and the air distribution mechanism 30 and the air outlet of the cold storage device 20 ensure uniform cooling within the cargo compartment 50. This also eliminates the temperature rebound inside the cargo compartment 50 caused by the defrosting of the refrigeration units 10, improving the cooling quality of the goods.

[0026] In the later stages of refrigeration, after the cold energy in the cold storage device 20 is exhausted, the fan 24 on the cold storage device 20 is turned off, and the refrigeration unit 10 operates alone.

[0027] Each refrigeration unit 10 includes a compressor, evaporator, condenser, and expansion valve, while each cold storage device 20 also has an evaporator. The evaporators in the corresponding refrigeration units 10 and cold storage devices 20 are arranged in parallel. The low-temperature airflow generated by the evaporator of the refrigeration unit 10 is blown out through the air duct of the parallel air distribution mechanism 30, while the low-temperature airflow generated by the evaporator of the parallel cold storage fan 24 is blown out by its own fan 24.

[0028] Please see Figures 1 to 5As a specific embodiment of the refrigeration system provided by this utility model, both refrigeration units 10 are located outside the carriage 50 and fixed to the front wall of the carriage 50; both cold storage devices 20 are located inside the carriage 50 and fixed to the floor and front wall of the carriage 50; the refrigeration unit 10 also includes at least two air inlet chambers 13 opened on the front wall of the carriage 50, and both air outlet channels 12 are connected to the corresponding air inlet chambers 13; one end of the air distribution mechanism 30 is connected to the front wall of the carriage 50; by placing the two refrigeration units 10 outside the carriage 50 and the cold storage devices 20 inside the carriage 50, the external placement of the refrigeration units 10 does not occupy the storage space of the carriage 50, which is convenient for inspection and maintenance; the cold storage devices 20 are close to the floor and the front wall, which can utilize the corner space of the carriage 50, does not affect the stacking of goods, and can quickly respond to the cooling demand of the bottom and front of the carriage 50. The refrigeration unit 10 is fixedly installed on the front wall of the carriage 50, while the cold storage device 20 is fixedly installed on the front side of the carriage 50. Meanwhile, the air distribution mechanism 30 is installed on the top rear of the carriage 50, with one end connected to the front wall to connect with the air outlet duct 12 of the refrigeration unit 10. An air inlet cavity 13 is opened in the front wall of the carriage 50, and the air outlet duct 12 connected to the air distribution mechanism 30 is connected to the air inlet cavity 13, allowing the cold air generated by the refrigeration unit 10 to smoothly pass through the air inlet cavity 13 and the air outlet duct 12 into the air distribution mechanism 30. The air distribution mechanism 30 is connected to the front wall, facilitating connection with the air outlet duct 12 of the refrigeration unit 10, reducing cold air delivery loss, and making cold air delivery more efficient.

[0029] Please see Figures 1 to 8As a specific embodiment of the refrigeration system provided by this utility model, the front wall of the carriage 50 is provided with at least two sets of openings 14 connected to the air inlet cavity 13 and at least two sets of ventilation pipes 15 connected to the air inlet cavity 13 on one side inside the carriage 50; the two sets of openings 14 and the two sets of ventilation pipes 15 are four air outlet channels 12 on the two refrigeration units 10, and the two sets of openings 14 are connected to the two air distribution mechanisms 30, and the two sets of ventilation pipes 15 are connected to the two cold storage devices 20; by using the openings 14 to connect to the air distribution mechanism 30 and the ventilation pipes 15 to connect to the cold storage devices 20, the air outlet channels 12 of the refrigeration units 10 are precisely connected to the air distribution mechanism 30 and the cold storage devices 20, so that the cold air delivery path is more concentrated in the front area of ​​the carriage 50. The opening 14 and ventilation duct 15 are integrated into the inner side of the front wall, eliminating the need for additional channels in other locations of the carriage 50, reducing structural modifications to the carriage 50, and lowering installation difficulty. Cold air is directly delivered from the front wall of the carriage 50 to the air distribution mechanism 30 and the cold storage device 20, shortening the delivery distance, reducing cold loss during transmission, and improving cooling efficiency. This centralized connection layout also facilitates future inspection and maintenance of the cold air delivery path, reducing troubleshooting difficulty. After implementation, it reduces cold loss, allowing the air distribution mechanism 30 and the cold storage device 20 to receive low-temperature cold air more quickly, accelerating the overall cooling speed of the carriage 50, and further improving the uniformity of cold air. Multiple ventilation ducts 15 are used in each group to connect with the cold storage pipes 27 on the cold storage device 20. The opening 14 is located on the upper side of the front wall of the carriage 50 and corresponds to the air distribution mechanism 30.

[0030] Please see Figures 1 to 8 As a specific embodiment of the refrigeration system provided by this utility model, multiple cold storage devices 20 are integrated and installed in a box 23 inside the carriage 50. The box 23 is connected to the front wall and the floor of the carriage 50. The exhaust vent 22 is located on the upper part of the box 23 near the front wall of the carriage 50 and is connected to the interior of the box 23. The air inlet 21 is located on the side of the box 23 away from the front wall of the carriage 50 and is equipped with a fan 24. The box 23 enables centralized storage of the cold storage devices 20 and optimizes the position of the air vents and supporting components. The integrated installation saves space in the carriage 50, and the box 23 is structurally connected to the carriage 50, preventing the cold storage devices 20 from shifting due to transportation bumps. The exhaust vent 22 is close to the front wall and at the top, which fits the cold air circuit design along the inner wall of the carriage 50. The fan 24 installed in the air inlet 21 can actively draw in cold air, improving the cold absorption efficiency of the cold storage devices 20. After implementation, on the one hand, the centralized layout makes the space of the carriage 50 more rational and facilitates the neat stacking of goods; on the other hand, the fan 24 enhances the air intake effect, enabling the cold storage equipment 20 to quickly store cold, and the exhaust port 22 ensures that the cold air flows smoothly along the inner wall. Together with the air distribution mechanism 30, it further improves the uniformity of cold air in the carriage and reduces temperature fluctuations.

[0031] Preferably, the housing 23 is equipped with three fans 24, and the fans 24 are axial flow fans. The two cold storage devices 20 inside the housing 23 each have dozens of cold storage pipes 27. The central pipe of the cold storage pipe 27 flows with refrigerant, and the outer layer stores phase change material. During charging, the control system controls the refrigeration unit 10 to start, causing the refrigerant to flow in the central pipe, thereby causing the outer phase change material to undergo a phase change and complete cold storage. Several fins connected to the central pipe can effectively and quickly transfer cold energy, shortening the phase change time. During cooling, the control system controls the three fans 24 on the outside to operate, causing the air inside the compartment 50 to pass through the cold storage pipes 27 for heat exchange.

[0032] Please see Figures 1 to 3 , Figure 5 As a specific embodiment of the refrigeration system provided by this utility model, the cold storage device 20 also includes multiple vertical ducts 25 fixedly installed on the front wall of the carriage 50. The multiple vertical ducts 25 are arranged in parallel and spaced apart, and their lower ends are all connected to the exhaust vents 22. The cold air discharged from the cold storage device 20 is vertically guided along the front wall of the carriage 50 through the vertical ducts 25, forming an orderly vertical cold air flow path. The parallel and spaced vertical ducts 25 can evenly disperse the cold air to a higher position on the front wall of the carriage 50 to ensure that the cold air moves in a ring along the inner wall of the carriage 50. The vertical ducts 25 are fixed to the front wall, do not occupy the storage space of the carriage 50, and increase the load-bearing capacity and strength of the front wall. The design of its lower end being connected to the exhaust vents 22 can efficiently receive the cold air discharged from the cold storage device 20 and reduce the loss of cold air during transmission. After implementation, the vertical duct 25 guides the cold air to diffuse evenly upward along the front wall, forming a more comprehensive three-dimensional circulation with the cold air from the top down of the air distribution mechanism 30 and the cold air at the bottom of the carriage 50, which greatly improves the temperature consistency of different height areas in the carriage 50; at the same time, this method also reduces cold air loss, allowing the cold energy released by the cold storage device 20 to be fully utilized.

[0033] Please see Figures 1 to 5As a specific embodiment of the refrigeration system provided by this utility model, the refrigeration system also includes a frame platform 40 installed on the front side of the carriage 50 and a housing 41 installed on the frame platform 40. Multiple refrigeration units 10 are located inside the housing 41. The air inlet channel 11 is connected to the housing 41. Multiple ventilation slots 42 are provided on the bottom plate of the carriage 50 below the boxes 23, and the ventilation slots 42 are connected to the inside of the housing 41. The bottom plate of the boxes 23 is provided with a through slot 26 for connecting the carriage 50 and the housing 41. This structure constructs a protective space for the refrigeration units 10 and an airflow circulation channel inside and outside the carriage 50. The housing 41 can protect the refrigeration units 10 from external interference, while the frame platform 40 makes the installation position of the refrigeration units 10 more stable and maintains a reasonable distance from the carriage 50, reducing the heat transfer of the refrigeration units 10 to the carriage 50. The ventilation slots 42 and the through slot 26 form an airflow loop, allowing the refrigeration units 10 to draw in cold air from the carriage 50 during operation. A base is provided at the lower end of the housing 23, and a through slot 26 is opened on the base to ensure that the air intake path of the refrigeration unit 10 matches the cold air movement path of the cold storage device 20 and the air distribution mechanism 30, so as not to obstruct or interfere with each other.

[0034] Please see Figures 1 to 8 As a specific embodiment of the refrigeration system provided by this utility model, there are two refrigeration units 10, two cold storage devices 20, and two air distribution mechanisms 30. The two refrigeration units 10 are arranged vertically side by side, the two cold storage devices 20 are arranged horizontally side by side, and the two air distribution mechanisms 30 are arranged parallel and spaced apart along the width direction of the carriage 50. The orderly arrangement of each component inside and outside the carriage 50 is achieved through a regular symmetrical layout. The vertically arranged refrigeration units 10 can make full use of the vertical space of the front wall of the carriage 50 and avoid occupying the horizontal storage area. The horizontally arranged cold storage devices 20 can evenly distribute the cold energy at the bottom of the carriage 50 and facilitate the formation of airflow circulation in conjunction with the ventilation slots 42 and the through slots 26. The air distribution mechanisms 30 spaced apart along the width direction can evenly cover the top cold air along the width of the carriage 50 and reduce local temperature dead zones. Therefore, the layout maximizes the use of the space in the carriage 50 and increases cargo loading capacity. At the same time, the symmetrical distribution ensures a more balanced output of cooling capacity. The refrigeration units 10 work synchronously to accelerate the cooling speed, and the cold storage equipment 20 and the air distribution mechanism 30 work together to enhance the uniformity of cold air. During defrosting, an alternating operation method is used. One refrigeration unit 10 stops working to perform defrosting, while the other refrigeration unit 10 increases its cooling power to 100%, significantly reducing the impact on the temperature inside the carriage 50.

[0035] Please see Figures 1 to 3 , Figures 9 to 12As a specific embodiment of the refrigeration system provided by this utility model, the air distribution mechanism 30 includes several elongated channels 32 arranged at intervals. Each elongated channel 32 has an air collection chamber 33, and an air outlet 31 is opened on the outer wall of the elongated channel 32 and connected to the air collection chamber 33. One end of the elongated channel 32 is connected to another air outlet channel 12. There are multiple air outlets 31, which are arranged in multiple groups. The multiple groups of air outlets 31 are arranged circumferentially at intervals, and the multiple air outlets 31 in the same group are arranged along the length of the elongated channel 32. This forms a segmented, multi-directional air outlet structure, thereby achieving precise and comprehensive distribution of cold air. By utilizing elongated channels 32 arranged along the length of the carriage 50, and in conjunction with multiple sets of circumferentially spaced air outlets 31, cold air can cover the carriage 50 from different directions, avoiding localized temperature differences caused by traditional single air outlets. The multiple air outlets 31 arranged along the length of the carriage ensure uniform longitudinal cooling within the carriage 50, and the air collection chamber 33 can temporarily store cold air, stabilizing the air pressure. The design of several spaced elongated channels 32 further enhances the coverage of cold air across the width of the carriage 50. The cold air within the carriage 50 achieves a three-dimensional, uniform distribution in the longitudinal, lateral, and multi-directional directions, significantly reducing temperature differences between different areas.

[0036] Please see Figures 9 to 12 As a specific embodiment of the refrigeration system provided by this utility model, multiple air ducts 34 are fixedly installed in the elongated channel 32, and each air duct 34 corresponds to a multiple air outlet 31. The lower end of the air duct 34 is connected to the air outlet 31, and the air duct 34 and the air outlet 31 are arranged coaxially. The air duct 34 guides the cold air in the air collection chamber 33 in a directional manner, enhancing the accuracy and stability of the air outlet. The coaxial arrangement of the air ducts 34 can prevent the cold air from becoming turbulent at the air outlet 31, reduce wind resistance and cold loss, and ensure that the cold air is efficiently delivered along the preset direction. The one-to-one correspondence between the air duct 34 and the air outlet 31 allows for independent guidance of each air outlet, adapting to the refrigeration needs of different areas in the carriage 50, especially for delivering cold air to areas with dense cargo. The fixed structure of the air duct 34 can also enhance the overall strength of the elongated channel 32 and improve the anti-bumping ability of the air distribution mechanism 30. This structure significantly improves the efficiency of cold air delivery, accelerates cooling, and accurately covers all target areas within the carriage, further reducing temperature differences between different locations. On the other hand, it enhances airflow stability, preventing localized accumulation or insufficient cooling due to airflow turbulence and ensuring uniform heating of goods.

[0037] The lower end of the elongated passageway 32 is provided with an airflow outlet 35 for forming an air curtain. The airflow outlet 35 is located on the side of the elongated passageway 32 near the rear of the carriage 50, allowing cold air to be discharged from the airflow outlet 35 to form a barrier airflow. This causes the cold air discharged from the airflow outlet 35 near the rear of the carriage 50 to form a vertical air curtain at the rear of the carriage 50, effectively blocking the intrusion of hot outside air from the doors of the carriage 50 (especially the normally open rear door), while reducing the loss of cold air inside the carriage 50, reducing cooling loss, and maintaining a stable internal temperature of the carriage 50. The air curtain maintains the temperature by actively blocking rather than simply enhancing cooling.

[0038] Please see Figure 1 This utility model embodiment also provides a refrigerated truck, which includes any of the above-mentioned refrigeration systems.

[0039] The refrigerated truck provided by this utility model adopts the above-mentioned refrigeration system. Therefore, by using the combination of refrigeration unit 10 and cold storage device 20, the cooling time of the initial cooling stage of the compartment 50 is reduced, and the air outlet of the air distribution mechanism 30 and cold storage device 20 makes the cooling inside the compartment 50 uniform. At the same time, it also eliminates the phenomenon of temperature rebound inside the compartment 50 caused by defrosting of refrigeration unit 10, and improves the cooling quality of goods.

[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A refrigeration system, characterized in that, include: At least two refrigeration units are provided, each of which has an air inlet channel and two air outlet channels, the air inlet channel being used to connect with the interior of the carriage. At least two cold storage devices are provided, each corresponding to one of the refrigeration units. The cold storage device is connected to one of the air outlet channels of the corresponding refrigeration unit for absorbing cold air. The cold storage device is provided with an air inlet and an air outlet connected to the carriage, with the air inlet located close to the bottom of the carriage and the air outlet located close to the inner wall of the carriage. There are at least two air distribution mechanisms, each corresponding to one of the refrigeration units; the air distribution mechanism is used to be installed on the top of the carriage and is arranged along the length of the carriage; the air distribution mechanism has an air outlet with the outlet facing downwards, and the air distribution mechanism is connected to another air outlet channel of the corresponding refrigeration unit.

2. The refrigeration system as described in claim 1, characterized in that, Both refrigeration units are located outside the carriage and are fixed to the front wall of the carriage; both cold storage devices are located inside the carriage and are fixed to the carriage floor and the front wall of the carriage; each refrigeration unit also includes at least two air inlet chambers opened on the front wall of the carriage, and both air outlet channels are connected to the corresponding air inlet chambers; one end of each air distribution mechanism is connected to the front wall of the carriage.

3. The refrigeration system as described in claim 2, characterized in that, The front wall of the carriage is provided with at least two sets of openings connected to the air inlet cavity and at least two sets of ventilation pipes connected to the air inlet cavity on one side inside the carriage; the two sets of openings and the two sets of ventilation pipes are the four air outlet channels on the two refrigeration units, and the two sets of openings are connected to the two air distribution mechanisms, and the two sets of ventilation pipes are connected to the two cold storage devices.

4. The refrigeration system as described in claim 1, characterized in that, Multiple cold storage devices are integrated and installed in a box inside the carriage. The box is connected to the front wall and floor of the carriage. The exhaust vent is located on the upper part of the box near the front wall of the carriage and is connected to the interior of the box. The air inlet is located on the side of the box away from the front wall of the carriage and is equipped with a fan.

5. The refrigeration system as described in claim 4, characterized in that, The cold storage device also includes multiple vertical ducts fixedly installed on the front wall of the carriage. The multiple vertical ducts are arranged in parallel at intervals, and their lower ends are all connected to the exhaust vent.

6. The refrigeration system as described in claim 4, characterized in that, The refrigeration system also includes a frame platform installed on the front of the carriage and a housing installed on the frame platform, with multiple refrigeration units located inside the housing; the air inlet channel is connected to the housing, and multiple ventilation slots are provided on the floor of the carriage below the housing, and the ventilation slots are connected to the interior of the housing; the floor of the housing is provided with a through slot for connecting the carriage and the housing.

7. The refrigeration system as described in claim 1, characterized in that, There are two refrigeration units, two cold storage devices, and two air distribution mechanisms. The two refrigeration units are arranged vertically side by side, the two cold storage devices are arranged horizontally side by side, and the two air distribution mechanisms are arranged parallel and spaced apart along the width of the carriage.

8. The refrigeration system as described in claim 1, characterized in that, The air distribution mechanism includes several elongated channels arranged at intervals, each elongated channel having an air collection chamber, and the air outlets are located on the outer wall of the elongated channels and connected to the air collection chambers; one end of each elongated channel is connected to another air outlet channel; there are multiple air outlets, which are arranged in multiple groups; the multiple groups of air outlets are arranged circumferentially at intervals, and multiple air outlets in the same group are arranged along the length of the elongated channels.

9. The refrigeration system as described in claim 8, characterized in that, The long channel is also equipped with multiple air intake pipes, and each of the multiple air intake pipes corresponds to one of the multiple air outlets; the lower end of each air intake pipe is connected to the air outlet, and the air intake pipe and the air outlet are arranged coaxially.

10. A refrigerated truck, characterized in that, Includes the refrigeration system as described in any one of claims 1-9.

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