Wide face space integrated chiller

Abstract

This invention relates to an integrated refrigeration unit for wide-area spaces, comprising an outdoor unit and an indoor unit. The indoor unit is connected to the outdoor unit via an adapter panel. The indoor unit includes a lower casing and an outlet plenum. The lower casing has bottom, left, and right return air vents on its front and left / right sides, respectively. An evaporator coil is inclinedly installed inside the lower casing, with its downward-sloping windward surface corresponding to the bottom, left, and right return air vents. A fan is installed above the inclined surface of the evaporator coil. The lower casing is connected to and supports the outlet plenum via the fan. The outlet plenum has front, left, and right air outlets on its front, left, and right sides, respectively, spaced apart and equipped with multi-layered baffles. An inner baffle is located at the rear of the outlet plenum, inclined towards the left, right, and front / right air outlets. In any two adjacent baffles, the vertical front-to-back projection width of the upper baffle is greater than that of the lower baffle. This refrigerant is easily adaptable to various container installations and provides good cooling performance in wide-area spaces.

Description

Technical Field

[0001] This invention relates to a refrigeration machine, specifically an integrated refrigeration machine for wide-area spaces. Background Technology

[0002] With rising living standards and the shift from traditional offline retail to online sales, people have higher demands for food freshness and rapid delivery. This places unprecedented demands on cold chain equipment. For example, in fields, quick-freezing, pre-cooling, and refrigeration are necessary to ensure the freshness and shelf life of fruits, vegetables, meat, and seafood by cooling them at the source. In urban areas, e-commerce companies need to build numerous pre-positioned cold storage warehouses for temporary sorting and storage of online retail food; there are also cold storage facilities at ports, etc. These cold storage facilities often need to be quickly assembled, mobile, and have excellent insulation performance. Traditional modular cold storage facilities simply cannot meet these requirements.

[0003] The existing solution is to transport refrigerated containers to the user's site for rapid assembly, creating a mobile cold storage unit of variable size. The refrigerated containers on the sides have insulation panels on three sides, with the inward-facing side lacking insulation. The refrigerated container in the middle has insulation panels at the front and rear ends, but not on the left and right sides. Depending on the number of units, it can be assembled into a module of 3 units, or even 6 or 9 units.

[0004] Beyond solving the issue of the cold storage structure, a corresponding refrigeration system is also required, and the most crucial component of this system is the air cooler inside the cold storage. Traditional air coolers consist of an evaporator heat exchange coil surrounded by an air chamber, with a fan installed in front of or behind the coil. They are ceiling-mounted inside the cold storage. When the fan operates, air flows through the heat exchange coil and is then delivered into the storage. Taking a three-unit cold storage unit as an example, to ensure a uniform temperature distribution within the unit and considering the module size requirements, a ceiling-mounted air cooler needs to be installed at the rear of each container. This results in high operating costs, making the overall mobile cold storage unit uncompetitive in terms of cost. Summary of the Invention

[0005] This invention provides an integrated refrigeration unit that is easy to install and has a good cooling effect in a wide area.

[0006] The technical solution adopted in this invention is: an integrated refrigeration unit for wide-area spaces, comprising an outdoor unit and an indoor unit, characterized in that: the indoor unit is connected to the outdoor unit via an adapter panel; multiple condenser fans are installed on the top of the outdoor unit; an air inlet is installed on the rear side of the outdoor unit; and heat dissipation holes are installed on both sides of the outdoor unit; the indoor unit includes a lower casing and an outlet static pressure box; the lower casing is supported by support legs; bottom, left, and right return air inlets are respectively provided on the front and left / right sides of the lower casing; an evaporator coil is inclinedly installed inside the lower casing; the downward inclined air-facing surface of the evaporator coil corresponds to the bottom, left, and right return air inlets; a fan is installed above the inclined surface of the evaporator coil; and the lower casing is connected via the fan... The air outlet plenum is supported by a front, left, and right air outlets. The left and right air outlets are separated from the front air outlet by left and right inclined partitions, respectively. Each of the front, left, and right sides has one or more layers of spaced guide plates. The rear of the air outlet plenum also has an inner guide plate, which consists of a left side, a middle side, and a right side that are connected in sequence. The left side, middle side, and right side are inclined towards the front left, front, and right air outlets, respectively. In any two adjacent guide plates, the vertical front-to-back projection width of the upper guide plate is greater than that of the lower guide plate.

[0007] Furthermore, the guide vane in the front air outlet is a horizontal guide vane, and the guide vanes in the left and right air outlets are upward-sloping guide vanes.

[0008] Furthermore, the front air outlet is divided into a left front air outlet and a right front air outlet, which are separated by a middle vertical partition. Both the left front air outlet and the right front air outlet are provided with one or more layers of guide plates spaced vertically.

[0009] Furthermore, the outdoor unit compressor exhaust pipe is also connected below the inclined windward side of the evaporator coil as a defrosting pipe, and a water receiving tray is installed below the defrosting pipe.

[0010] Furthermore, protective mesh is provided on the bottom return air vent and the side return air vent.

[0011] Furthermore, the front side of the air outlet static pressure box is fitted with an adjustment frame connected to the front air outlet. The adjustment frame is divided into multiple layers, each corresponding to the gap between the multiple layers of guide plates in the front air outlet. Each layer of the adjustment frame is evenly distributed with multiple vertical small partitions that can be horizontally rotated and have adjustable angles.

[0012] Furthermore, the adapter panel is provided with an insulation plate on the side facing outward.

[0013] Furthermore, the outdoor unit is equipped with lifting lugs on the top, observation windows on the side, and loading and unloading ports on the rear bottom.

[0014] Furthermore, the outdoor unit is equipped with a compressor, oil separator, dryer filter, liquid receiver, and condenser connected in sequence, and then the indoor unit's evaporator coil is connected back to the compressor via the gas-liquid separator.

[0015] This refrigerant outdoor unit integrates all refrigeration components, including the compressor, condenser, evaporator, and electrical control box. Installation is simple: just drill mounting holes in the enclosure or cold storage unit, insert the entire unit into the holes, position it using the adapter panel, insulate it with insulation board, tighten the bolts, and plug it in to start cooling. The indoor unit features a front-facing air outlet plenum for uniform, fast, and extended airflow, resulting in better cooling performance. Combined with the rear guide plate at the back of the plenum and the inclined guide plates on both sides, the uniformity and speed of the side airflow are greatly improved. This allows for wider coverage of the space, resulting in a more uniform temperature field and better cooling performance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 Rear 3D structure diagram;

[0018] Figure 3 This is a schematic diagram of the external internal structure;

[0019] Figure 4 for Figure 1 Left view;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the internal unit of the present invention;

[0021] Figure 6 This is a schematic diagram of the outlet static pressure box structure;

[0022] Figure 7 for Figure 6 AA view;

[0023] Figure 8 for Figure 6 An internal top view;

[0024] Figure 9 This is a flow chart of the wind speed during operation in a cold storage facility without any goods, as shown in this embodiment.

[0025] Figure 10 This is a flow chart of the wind speed during operation in this embodiment when there is no middle partition or small middle partition and no goods in the cold storage.

[0026] Figure 11 This is a flow chart of the wind speed during operation in a cold storage facility with goods present, as described in this embodiment.

[0027] Figure 12This is a flow chart of the wind speed during operation in the cold storage when there are goods inside, without a middle partition or a small middle partition.

[0028] In the diagram: 1. Lower casing; 2. Support leg; 3. Bottom return air vent; 4. Left return air vent; 5. Right return air vent; 6. Protective mesh; 7. Defrosting pipe; 8. Water tray; 9. Evaporator coil; 10. Indoor unit fan; 11. Outlet static pressure box; 12. Inner guide plate; 13. Left front air outlet; 14. Right front air outlet; 15. Horizontal guide plate; 16. Middle vertical partition; 17. Adjustable frame; 18. Vertical small partition; 19. Left inclined partition; 20. Right inclined partition; 21. Left air outlet; 22. Right air outlet; 23. Inclined guide plate; 24. Adaptor panel; 25. Insulation board; 26. Outdoor unit casing; 27. Heat dissipation hole; 28. Observation window; 29. ​​Air inlet; 30. Outdoor unit fan; 31. Compressor; 32. Oil separator; 33. Dryer filter; 34. Liquid receiver; 35. Condenser; 36. Gas-liquid separator; 37. Loading / unloading port. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] An integrated refrigeration unit for wide-area spaces includes an outdoor unit and an indoor unit.

[0031] See Figure 1 , 2 As shown in Figures 3 and 4, the outdoor unit's casing 26 is connected to the indoor unit via an adapter panel 24. An insulation plate 25 is installed on the side of the adapter panel facing outwards. The outdoor unit casing 26 houses an outdoor unit fan 30, a compressor 31, an oil separator 32, a dryer filter 33, a liquid receiver 34, a condenser 35, and a gas-liquid separator 36. The exhaust from the compressor 31 passes through the oil separator 32, dryer filter 33, liquid receiver 34, and condenser 35, then connects to the indoor unit's evaporator coil 9, and finally returns to the compressor via the gas-liquid separator 36. The outdoor unit fan 30 is located above the condenser 35 at the top of the outdoor unit casing 26. The outdoor unit has lifting lugs on the top, an observation window 28 on the side, a loading / unloading port 37 at the bottom rear, and ventilation holes 27 on the upper and lower sides.

[0032] See Figure 5 , 6The indoor unit shown in Figures 7 and 8 includes a lower casing 1, support legs 2, protective mesh 6, defrosting pipe 7, water tray 8, evaporator coil 9, indoor unit fan 10, outlet static pressure box 11, inner guide plate 12, horizontal guide plate 15, middle vertical partition 16, adjusting frame 17, vertical small partition 18, left side inclined partition 19, right side inclined partition 20, and inclined guide plate 23. The lower box 1 is supported by support legs 2. A bottom return air inlet 3 is located on the front of the lower box 1, and left and right return air inlets 4 and 5 are located on the left and right sides respectively. An evaporator coil 9 is installed at an angle inside the lower box 1. Below the downward-sloping, windward side of the evaporator coil, the exhaust pipe of the outdoor unit compressor is connected as a defrosting pipe 7. A water collection tray 8 is located below the defrosting pipe. The downward-sloping, windward side of the evaporator coil corresponds to the bottom return air inlet 3 and the left and right return air inlets 4 and 5 on both sides. An indoor unit fan 10 is installed above the upward-sloping side of the evaporator coil. The lower box is connected to a support air outlet static pressure box 11 via the indoor unit fan. A front air outlet 21, a left air outlet 21, and a right air outlet 22 are located on the front, left, and right sides of the air outlet static pressure box, respectively. The front air outlet is divided into a left front air outlet 13 and a right front air outlet 14 by a central vertical partition 16. Both the left and right front air outlets have one or more layers of horizontally spaced sections. The air deflector 15 and the air outlet static pressure box 11 are fitted with an adjustment frame 17 that is connected to the front air outlet. The adjustment frame is divided into multiple layers, which correspond to the gaps between the multiple horizontal air deflectors in the front air outlet. Each layer of the adjustment frame is evenly distributed with multiple vertical small partitions 18 that can be rotated horizontally and have adjustable angles. The left and right air outlets are separated from the left and right front air outlets by the left inclined partition 19 and the right inclined partition 20, respectively. The left and right air outlets are each provided with one or more inclined air deflectors 23 that are spaced vertically. The rear part of the air outlet static pressure box 11 is also provided with an inner air deflector 12. The inner air deflector includes a left part, a middle part and a right part that are connected in sequence. The left part, the middle part and the right part are inclined towards the left air outlet, the front air outlet and the right air outlet, respectively. In any two adjacent air deflectors, the vertical front-to-back projection width of the upper air deflector is greater than that of the lower air deflector.

[0033] In this embodiment, protective mesh 6 is provided on the bottom return air vent and the left and right return air vents to protect the return air from foreign objects entering.

[0034] Based on this embodiment, all sides of the air deflectors can be connected to a rotation controller to make the angle adjustable. This technology belongs to the existing air conditioning air outlet technology.

[0035] The horizontal guide vanes of the outlet static pressure box are distributed at the front of the static pressure chamber, and the cross-section of the lower horizontal guide vane is smaller than that of the upper horizontal guide vane; for example Figure 7The lower edge of the front air outlet of the plenum chamber, the lower horizontal guide plate, the upper horizontal guide plate, and the top plate of the plenum chamber form three layers of air ducts, namely the first, second, and third layers. Gas cooled by the evaporator coils is drawn in by the fan and pushed upwards. As the gas flows upwards, some of it first encounters the lower horizontal guide plate and is guided out through the first layer of air ducts. The remaining unobstructed gas continues to flow upwards, and when it reaches the upper horizontal guide plate, some of it is guided out through the second layer of air ducts. The last unobstructed gas continues to move upwards, and when it reaches the top sealing plate of the plenum chamber, it is guided out through the third layer of air ducts. The horizontal guide plates sequentially divert and guide the gas within the plenum chamber, making it as laminar as possible, thus allowing the cold gas to travel further along the top of the cold storage, i.e., a greater range. The left-side inclined baffle, the middle vertical side baffle, and the right-side inclined baffle divide the airflow on the same horizontal plane into zones, distributing the airflow. The middle vertical baffle provides structural support and, together with other small middle baffles, helps to organize and guide the airflow. The small middle baffles primarily counteract the airflow rotation caused by the clockwise rotation of the fan, improving the uniformity and speed of the front airflow, increasing the jet range, and improving the cooling effect. The internal guide plate at the rear of the plenum directs the airflow from the fan to the front, left, and right air outlets, significantly improving the uniformity and speed of the airflow.

[0036] The gas entering the outlet plenum does not move entirely forward along the indoor unit's fan motor shaft; there is also a velocity component on the fan blade cross-section perpendicular to the motor shaft. Therefore, the gas driven by the axial fan is actually flowing gas rotating forward with the motor shaft as its axis. In practice, the outlet plenum cannot be very large to ensure truly uniform airflow within it. Figure 9-12 The flow restriction diagram simulates the operation of an air cooler in a three-compartment unit, and the flow field is analyzed using the moving finite element method. It can be seen that the guide vanes in the outlet static pressure box have a significant impact on the flow field distribution. Without the intermediate baffle and rear guide vane, the air velocity at the front is uneven, with higher velocity on the left and lower velocity on the right, and a large vortex forms in the middle of the unit. After adding the intermediate baffle and rear guide vane, the air velocity increases, and the vortex disappears; the uniformity of the cooler's airflow and the air velocity become more stable.

[0037] The adapter panel and insulation board are made of a single foam board with multiple pre-embedded sections. Bolt holes on the adapter panel allow for a secure and locking connection with the container's mounting openings, ensuring convenient and stable installation.

Claims

1. A wide-area integrated refrigeration unit, comprising an outdoor unit and an indoor unit, characterized in that: The indoor unit is connected to the outdoor unit via an adapter panel. The outdoor unit has multiple condenser fans on its top, an air inlet at the rear, and ventilation holes on both sides. The indoor unit includes a lower casing and an outlet plenum. The lower casing is supported by support legs. Bottom, left, and right return air vents are located on the front and left / right sides of the lower casing, respectively. An evaporator coil is installed at an angle inside the lower casing, with its downward-sloping air-facing surface corresponding to the bottom, left, and right return air vents. A fan is installed above the inclined surface of the evaporator coil. The lower casing is connected to the outlet plenum via the fan. The front and left sides of the outlet plenum... Front, left, and right air outlets are respectively opened on the front and right sides. The left and right air outlets are separated from the front air outlet by left and right inclined partitions, respectively. Each of the front, left, and right sides has one or more layers of guide vanes spaced vertically. The rear of the air outlet static pressure box is also equipped with an inner guide vane, which includes a left side, a middle side, and a right side that are connected in sequence. The left side, middle side, and right side are inclined towards the front left, front, and right air outlets, respectively. In any two adjacent guide vanes, the vertical front-to-back projection width of the upper guide vane is greater than that of the lower guide vane. The guide vane inside the front air outlet is a horizontal guide vane, and the guide vanes inside the left and right air outlets are upward-sloping guide vanes. The front air outlet is divided into a left front air outlet and a right front air outlet. The left front air outlet and the right front air outlet are separated by a middle vertical partition. Both the left front air outlet and the right front air outlet are equipped with one or more layers of guide plates spaced vertically. The front side of the air outlet static pressure box is fitted with an adjustment frame connected to the front air outlet. The adjustment frame is divided into multiple layers, each corresponding to the gap between the multiple layers of guide plates in the front air outlet. Each layer of the adjustment frame is evenly distributed with multiple vertical small partitions that can be rotated horizontally and have adjustable angles.

2. The integrated refrigeration unit for wide-area space use according to claim 1, characterized in that: The evaporator coil is also connected to the outdoor unit compressor exhaust pipe below the inclined windward side as a defrosting pipe, and a water collection tray is installed below the defrosting pipe.

3. The integrated refrigeration unit for wide-area space use according to claim 1, characterized in that: Protective mesh is installed on the bottom return air vent and the side return air vent.

4. The integrated refrigeration unit for wide-area space use according to claim 1, characterized in that: The adapter panel is equipped with an insulation board on the side facing outwards.

5. The integrated refrigeration unit for wide-area space use according to claim 1, characterized in that: The outdoor unit is equipped with lifting lugs on the top, observation windows on the side, and loading and unloading ports on the rear bottom.

6. The integrated refrigeration unit for wide-area space use according to claim 1, characterized in that: The outdoor unit is equipped with a compressor, oil separator, dryer filter, liquid receiver, and condenser connected in sequence, and then the indoor unit's evaporator coil is connected back to the compressor via the gas-liquid separator.

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