Cylindrical centrifugal separation and dehumidification dual closed loop intelligent anti-frosting cold storage air cooler
Patent Information
- Application Number
- CN202611039285.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-14
- Publication Date
- 2026-10-20
AI Technical Summary
[0002]现有冷库翅片式冷风机普遍存在湿空气直接冲刷低温蒸发器翅片的问题，水蒸气快速在翅片表面结霜结冰，导致换热效率下降、风阻增大、能耗升高，需频繁停机化霜，造成库温波动大、食品干耗高、设备寿命缩短
本发明所述的一种圆筒式离心分流除湿双闭环智能防结霜冷库冷风机，通过同轴设置的筒式外壳与筒式内壳构建环形离心除湿旁路风道与中心蒸发器换热风道的双风道结构，在高压离心风机出风侧配置可调电动导流板实现气流自适应分流，利用离心旋流作用对进入旁路的高湿空气完成气水分离除湿；同时基于湿度传感器与回气口低压传感器的实时检测信号构建湿度 - 蒸发压力双闭环协同控制系统，由智能控制器同步联动调节电动导流板开度、高压离心风机运行频率以及电子膨胀阀的冷媒进液量，从气路源头降低进入蒸发器的空气含湿量、从制冷系统侧精准匹配热负荷并调控蒸发温度，双重维度有效抑制蒸发器翅片结霜，显著减少停机化霜频次与库温波动，提升制冷换热效率与系统运行稳定性，降低冷库运行能耗，可稳定适配各类低温冷冻、冷藏冷库的工况需求。
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Abstract
Description
Technical Field
[0001] This invention relates to the field of cold storage refrigeration equipment technology, specifically to a cylindrical centrifugal dehumidification dual closed-loop intelligent anti-frost cold storage air cooler. Background Technology
[0002] Existing finned air coolers for cold storage generally suffer from the problem of humid air directly scouring the fins of the low-temperature evaporator. Water vapor quickly frosts and freezes on the fin surface, leading to decreased heat exchange efficiency, increased air resistance, and higher energy consumption. This necessitates frequent shutdowns for defrosting, resulting in large temperature fluctuations in the storage area, high food dryness loss, and shortened equipment lifespan.
[0003] Traditional evaporative air coolers mostly use a single temperature control to control refrigerant supply, which cannot dynamically adjust air volume and refrigerant flow according to air humidity and system evaporation pressure. The problem of frosting under high humidity conditions cannot be completely solved. At the same time, they generally use mechanical thermostatic expansion valves, which have low adjustment accuracy and slow response speed, and cannot match the cooling needs of variable operating conditions. The linkage between the fan and the refrigeration system is poor, and the overall operating efficiency is low, making it difficult to meet the needs of modern cold storage for high efficiency, energy saving and stable operation. Summary of the Invention
[0004] Purpose of the Invention: To overcome the shortcomings of existing technologies, this invention provides a cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler. It utilizes a dual-duct structure—a ring-shaped centrifugal dehumidification bypass duct and a central evaporator heat exchange duct—built coaxially with a cylindrical outer shell and inner shell. An adjustable electric guide vane is installed on the outlet side of the high-pressure centrifugal fan to achieve airflow diversion. Centrifugal swirling action completes air-water separation and dehumidification of the high-humidity air entering the bypass. Simultaneously, a humidity-pressure dual-closed-loop control system is constructed based on real-time detection signals from humidity sensors and a low-pressure sensor at the return air inlet. An intelligent controller coordinates the diversion opening of the electric guide vane, the operating frequency of the high-pressure centrifugal fan, and the refrigerant supply opening of the electronic expansion valve, dynamically adapting to dehumidification and refrigeration needs under different humidity conditions. This system suppresses frost formation on the evaporator fins from two dimensions: air source dehumidification and precise control of the refrigeration system. This reduces the frequency of defrosting shutdowns and temperature fluctuations in the cold storage, improves refrigeration and heat exchange efficiency and system stability, and lowers energy consumption in cold storage operation.
[0005] A cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler includes a cylindrical outer shell, a coaxially arranged cylindrical inner shell, a high-pressure centrifugal fan, centrifugal fan blades, a magnetic levitation / air levitation bearing, a centrifugal fan frequency converter, an adjustable electric guide plate located at the rear of the high-pressure centrifugal fan outlet, evaporator fins, a liquid distributor, a refrigerant inlet pipe, a refrigerant solenoid valve, an electronic expansion valve, a refrigeration return port, a humidity sensor, a low-pressure sensor at the return port, and an intelligent controller. An annular centrifugal dehumidification bypass duct is formed between the cylindrical outer shell and the cylindrical inner shell, and a central evaporator heat exchange duct is formed inside the cylindrical inner shell. The adjustable electric guide plate is located at the outlet of the high-pressure centrifugal fan and at the front end of the evaporator heat exchange duct, used to divert the high-pressure centrifugal fan outlet air to the central evaporator heat exchange duct and the annular centrifugal dehumidification bypass duct. The humidity sensor is installed at the outlet of the high-pressure centrifugal fan and in front of the electric guide plate, detecting and transmitting the outlet air humidity signal in real time. The system connects to an intelligent controller, which adjusts the opening of the electric guide vane based on the humidity signal to control the humidity and airflow of the air entering the evaporator fins. An electronic expansion valve is connected in series between the refrigerant inlet pipe and the distributor. A low-pressure sensor at the return air inlet is directly installed at the refrigeration return air inlet, collecting the low-pressure signal of the evaporator fins in real time and transmitting it to the intelligent controller. The intelligent controller constructs a humidity-pressure dual closed-loop control system, simultaneously receiving humidity and low-pressure signals, and collaboratively adjusting the opening of the electric guide vane, the operating frequency of the high-pressure centrifugal fan, and the refrigerant inlet opening of the electronic expansion valve. This achieves bypass centrifugal dehumidification of high-humidity air and central heat exchange refrigeration of low-humidity air, effectively suppressing frost formation on the evaporator fins while maintaining optimal heat exchange efficiency of the refrigeration system. The dry, cold air after heat exchange in the central evaporator heat exchange duct and the airflow after dehumidification in the annular centrifugal dehumidification bypass duct are mixed at the air outlet at the tail of the evaporator fan and then sent into the cold storage. By bypassing the source of high-humidity air for dehumidification and allowing low-humidity air to enter the evaporator for heat exchange, the source of water vapor that causes frost formation on the fins is directly isolated.
[0006] This invention discloses a cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler. The annular centrifugal dehumidification bypass duct has an annular water collection chamber on its inner wall. The bottom of the annular water collection chamber is connected to a condensate drain outlet to discharge the water condensed during centrifugal separation outside the machine. This efficiently collects the condensate thrown towards the inner wall of the duct under centrifugal swirling action, preventing the dehumidified water from being carried back into the evaporator by the airflow, thus ensuring dehumidification efficiency. The water is then discharged through the bottom drain outlet, ensuring smooth drainage without residue and maintaining the continuity and stability of the bypass dehumidification capacity.
[0007] This invention discloses a cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler. Under high humidity conditions, the intelligent controller controls the electric guide vane to reduce the opening of the central evaporator heat exchange duct and increase the opening of the annular centrifugal dehumidification bypass duct. Simultaneously, based on the low-pressure sensor signal at the return air port, it reduces the opening of the electronic expansion valve, decreasing the refrigerant supply and preventing excessively low evaporator fin temperatures that exacerbate frost formation. By enhancing centrifugal dehumidification in high humidity environments, the moisture content of the air entering the evaporator is significantly reduced, thus reducing the material basis for frost formation from the air source. Simultaneously, the refrigerant supply is reduced to prevent excessively low fin surface temperatures, inhibiting the frost rate from the cooling capacity side. The coordinated action of the air path and refrigerant system effectively suppresses the frost process, significantly extending the equipment's defrosting cycle.
[0008] This invention discloses a cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler. Under low humidity conditions, the intelligent controller controls the electric guide vane to increase the opening of the central evaporator heat exchange duct. Simultaneously, based on the signal from the low-pressure sensor at the return air port, it adjusts the opening of the electronic expansion valve to increase the refrigerant supply and refrigeration heat exchange efficiency. In low humidity environments, it fully utilizes the evaporator heat exchange area, increases the direct cooling airflow, and enhances the cooling output effect; simultaneously, it increases the refrigerant flow rate to match the increased heat exchange airflow, ensuring that the system's heat exchange efficiency is within the optimal range.
[0009] This invention discloses a cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler. The high-pressure centrifugal fan employs magnetic levitation / air suspension bearings, and is equipped with a centrifugal fan frequency converter to achieve variable frequency speed regulation. The output air pressure is adapted to the requirements of centrifugal cyclone air-water separation. The suspension bearings have extremely low friction loss, resulting in high fan operating efficiency, low noise, and long service life, making it suitable for the long-term continuous operation requirements of cold storage.
[0010] The present invention discloses a cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler, wherein the evaporator tube fins are arranged in a ring evenly within the central evaporator heat exchange duct of the cylindrical inner shell, and exchange heat fully with the diverted low-humidity air in a counter-current flow. The ring arrangement makes full use of the internal space of the cylinder, resulting in high heat exchange area utilization and a more compact overall structure.
[0011] As can be seen from the above technical solution, the present invention has the following beneficial effects: This invention discloses a cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler. It utilizes a coaxial cylindrical outer shell and inner shell to construct a dual-duct structure consisting of a ring-shaped centrifugal dehumidification bypass duct and a central evaporator heat exchange duct. An adjustable electric guide vane is configured on the outlet side of the high-pressure centrifugal fan to achieve adaptive airflow diversion. Centrifugal swirling action is used to complete air-water separation and dehumidification of the high-humidity air entering the bypass. Simultaneously, a humidity-evaporation pressure dual-closed-loop collaborative control system is constructed based on real-time detection signals from humidity sensors and low-pressure sensors at the return air inlet. An intelligent controller synchronously adjusts the opening of the electric guide vane, the operating frequency of the high-pressure centrifugal fan, and the refrigerant inlet volume of the electronic expansion valve. This reduces the moisture content of the air entering the evaporator from the air source and precisely matches the heat load and regulates the evaporation temperature from the refrigeration system side. This dual-dimensional approach effectively suppresses frost formation on the evaporator fins, significantly reduces the frequency of defrosting shutdowns and temperature fluctuations, improves refrigeration and heat exchange efficiency and system operational stability, reduces cold storage energy consumption, and can stably adapt to the operating conditions of various low-temperature freezing and refrigeration cold storage facilities. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of a cylindrical centrifugal dehumidification dual closed-loop intelligent anti-frost cold storage air cooler according to the present invention.
[0013] Explanation of reference numerals on the accompanying drawings: 1-Cylindrical outer shell, 2-Cylindrical inner shell, 3-High-pressure centrifugal fan, 4-Centrifugal fan blades, 5-Magnetic levitation / air levitation bearing, 6-Centrifugal fan frequency converter, 7-Adjustable electric guide plate, 8-Evaporator tube fins, 9-Dispenser, 10-Refrigerant inlet pipe, 11-Refrigerant solenoid valve, 12-Electronic expansion valve, 13-Refrigeration return air port, 14-Humidity sensor, 15-Return air port low-pressure sensor, 16-Intelligent controller, 17-Annular water collection chamber, 18-Condensate drain port. Detailed Implementation
[0014] Example 1 The following is in conjunction with the appendix Figure 1 The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.
[0015] The cylindrical centrifugal dehumidification dual closed-loop intelligent anti-frost cold storage air cooler disclosed in this embodiment has a coaxial double-layer cylindrical sealed insulation structure. The axial length of the whole machine is 1200mm and the cylinder diameter is 600mm. It is suitable for use in small and medium-sized low-temperature cold storage with a capacity of 100~500m³ and can stably cover the entire temperature range from -25℃ low-temperature freezing storage to 0~4℃ cold storage storage.
[0016] I. Structural Composition and Installation Layout Shell and air duct section The cylindrical outer shell 1 and the cylindrical inner shell 2 are coaxially nested, with a 35mm gap between them to form an annular centrifugal dehumidification bypass air duct; the internal cavity of the cylindrical inner shell 2 constitutes the heat exchange air duct of the central evaporator. An annular water collection chamber 17 is provided at the bottom of the cylindrical outer shell 1, and the lowest point of the annular water collection chamber 17 is connected to the condensate drain outlet 18, which is used to collect and discharge the condensate generated by centrifugal separation to the outside of the equipment.
[0017] air supply power section A high-pressure centrifugal fan 3 is installed at the air inlet of the equipment. The core power component of the high-pressure centrifugal fan 3 is the centrifugal fan blade 4, which adopts a stainless steel backward-curved high-pressure impeller structure. The supporting component of the centrifugal fan blade 4 is a magnetic levitation / air levitation bearing 5. A centrifugal fan frequency converter 6 is also provided. The operating speed range of the whole machine is 800~2800r / min, which can output a stable high-pressure airflow to meet the air pressure requirements of centrifugal cyclone gas-water separation.
[0018] airflow splitting section An adjustable electric guide plate 7 is installed on the air outlet side of the high-pressure centrifugal fan 3 and at the front end of the heat exchange duct of the central evaporator. The adjustable electric guide plate 7 is equipped with a stepper drive actuator, and the adjustment angle range is 0~90°. It can accurately allocate the air volume ratio between the heat exchange duct of the central evaporator and the bypass duct of the annular centrifugal dehumidification.
[0019] Refrigeration and heat exchange section Evaporator fins 8 are installed inside the heat exchange duct of the central evaporator. The evaporator fins 8 adopt an aluminum fin copper tube structure and are evenly arranged in a ring on the inner wall of the cylindrical inner shell 2, forming a counter-current heat exchange layout with the airflow direction. The liquid inlet end of the evaporator fins 8 is connected to the distributor 9. The refrigerant pipeline is connected in series with the refrigerant inlet pipe 10, refrigerant solenoid valve 11, and electronic expansion valve 12 before connecting to the distributor 9. The gas outlet end of the evaporator fins 8 is connected to the refrigeration return gas port 13. The return gas port low pressure sensor 15 is directly installed at the refrigeration return gas port 13. The range of the return gas port low pressure sensor 15 is 0~1.0MPa, which is used to collect the evaporation low pressure signal at the evaporator outlet in real time.
[0020] Intelligent control section A humidity sensor 14 is installed on the front side of the adjustable electric guide vane 7 and at the outlet of the high-pressure centrifugal fan 3 to detect the humidity of the air outlet in real time. The signal output terminals of the humidity sensor 14 and the low-pressure sensor 15 at the return air port are both connected to the intelligent controller 16. The intelligent controller 16 constructs a humidity-pressure dual closed-loop control system, synchronously receiving humidity and low-pressure signals, and coordinating the adjustment of the opening of the adjustable electric guide vane 7, the operating frequency of the high-pressure centrifugal fan 3, and the refrigerant inlet opening of the electronic expansion valve 12. A mixing outlet is set at the rear of the equipment, where the two airflows are mixed before being sent into the cold storage.
[0021] II. Overall Machine Operation Process Humid air inside the warehouse enters the high-pressure centrifugal fan 3 from the air inlet of the equipment. The magnetic levitation / air suspension bearing 5 drives the centrifugal fan blades 4 to rotate at high speed, generating a high-pressure airflow that is discharged to the rear. The humidity sensor 14 collects the humidity data of the airflow in real time and transmits the signal to the intelligent controller 16.
[0022] When a high humidity condition with an air humidity of ≥85% is detected, the intelligent controller 16 adjusts the opening of the adjustable electric guide plate 7 to guide more than 70% of the high humidity airflow into the annular centrifugal dehumidification bypass duct. The high humidity airflow swirls at high speed along the cylinder wall in the annular channel. Under the action of centrifugal force, the water vapor in the air is thrown to the inner wall of the cylindrical shell 1 and condenses into liquid water. The liquid water flows along the wall into the annular water collection chamber 17 below and is finally discharged to the outside of the equipment through the condensate drain outlet 18. The remaining low humidity airflow of less than 30% is guided by the adjustable electric guide plate 7 and enters the heat exchange duct of the central evaporator.
[0023] The refrigerant is delivered into the equipment through the refrigerant inlet pipe 10. After being controlled by the refrigerant solenoid valve 11, it enters the electronic expansion valve 12 for throttling and pressure reduction. Then, it is evenly distributed to each branch coil of the evaporator tube fins 8 through the distributor 9. The low-pressure sensor 15 at the return gas port collects the evaporation pressure signal at the refrigeration return gas port 13 in real time and transmits it to the intelligent controller 16. The intelligent controller 16 precisely adjusts the opening of the electronic expansion valve 12: when the evaporation pressure is too high, the opening of the electronic expansion valve 12 is increased to increase the refrigerant supply and enhance the refrigeration output; when the evaporation pressure is too low, the opening of the electronic expansion valve 12 is decreased to prevent the surface temperature of the evaporator tube fins 8 from being too low and exacerbating frost formation.
[0024] The low-humidity airflow entering the heat exchange duct of the central evaporator exchanges heat with the refrigerant in the evaporator tube fins 8 in a countercurrent manner to cool down, forming dry cold air; the airflow that has completed dehumidification in the annular centrifugal dehumidification bypass duct flows backward along the channel, and the two airflows are fully mixed at the mixing outlet at the rear of the equipment and then evenly sent into the cold storage to complete one refrigeration cycle.
[0025] III. Dual Closed-Loop Control Logic The core control logic of this embodiment is a dual closed-loop coordinated regulation of humidity and evaporation pressure, which is uniformly scheduled by the intelligent controller 16. The humidity closed loop is an outer loop control system, which consists of humidity sensor 14, intelligent controller 16, adjustable electric guide plate 7, and high-pressure centrifugal fan 3, forming an airflow diversion and control system. It controls the airflow diversion ratio and total air volume adjustment, and controls the source of water vapor for frosting from the air source end. The pressure closed loop is an inner loop control system, which is composed of a low-pressure sensor 15 at the return port, an intelligent controller 16, an electronic expansion valve 12, and evaporator fins 8. It controls the refrigerant circulation regulation system, which dominates the regulation of refrigerant supply and evaporation temperature, and controls the frosting rate on the fin surface from the refrigeration system side.
[0026] Under high humidity conditions, the intelligent controller 16 simultaneously performs two adjustments: First, it controls the adjustable electric guide vane 7 to reduce the opening of the central evaporator heat exchange duct and increase the opening of the annular centrifugal dehumidification bypass duct to enhance the bypass dehumidification effect. At the same time, it appropriately reduces the operating frequency of the high-pressure centrifugal fan 3 through the centrifugal fan inverter 6 to match the air volume requirements of the dehumidification condition. Second, it reduces the opening of the electronic expansion valve 12 based on the feedback signal from the low-pressure sensor 15 at the return air port to reduce the refrigerant supply and prevent the surface temperature of the evaporator fins 8 from being too low, thus curbing the frosting process from both the air path and the refrigerant system.
[0027] Under low humidity conditions, the intelligent controller 16 synchronously performs reverse regulation: First, it controls the adjustable electric guide plate 7 to increase the opening of the central evaporator heat exchange air duct, thereby increasing the proportion of air volume for direct heat exchange. At the same time, it increases the operating frequency of the high-pressure centrifugal fan 3 through the centrifugal fan inverter 6, thereby strengthening the total air supply capacity. Second, it adjusts the opening of the electronic expansion valve 12 according to the feedback signal from the low-pressure sensor 15 at the return air port, thereby increasing the refrigerant supply, making full use of the evaporator heat exchange area, and maximizing the refrigeration and heat exchange efficiency.
[0028] During the operation of the whole machine, the intelligent controller 16 collects humidity and pressure parameters in real time and dynamically matches the dehumidification requirements and cooling load under different working conditions, always maintaining the optimal balance between anti-frost effect and cooling efficiency, and can achieve adaptive operation under all working conditions without manual intervention.
[0029] The above embodiments are exemplary and are intended to illustrate the technical concept and features of the present invention, so that those skilled in the art can understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler, characterized in that, include: Cylindrical outer shell (1), coaxially arranged cylindrical inner shell (2), high-pressure centrifugal fan (3), centrifugal fan blades (4), magnetic levitation / air suspension bearing (5), centrifugal fan frequency converter (6), adjustable electric guide plate (7) on the rear of the air outlet side of high-pressure centrifugal fan (3), evaporator fins (8), liquid distributor (9), refrigerant inlet pipe (10), refrigerant solenoid valve (11), electronic expansion valve (12), refrigeration return air port (13), humidity sensor (14), return air port low pressure sensor (15), and intelligent controller (16); The cylindrical outer shell (1) and the cylindrical inner shell (2) form an annular centrifugal dehumidification bypass air duct. The cylindrical inner shell (2) forms a central evaporator heat exchange air duct. The adjustable electric guide plate (7) is set on the air outlet side of the high-pressure centrifugal fan (3) and the front end of the evaporator heat exchange air duct, and is used to divert the air outlet of the high-pressure centrifugal fan (3) to the central evaporator heat exchange air duct and the annular centrifugal dehumidification bypass air duct. The humidity sensor (14) is installed at the air outlet of the high-pressure centrifugal fan (3) and in front of the electric guide plate (7). It detects the air humidity signal in real time and transmits it to the intelligent controller (16). The intelligent controller (16) adjusts the flow opening of the electric guide plate (7) according to the humidity signal to control the air humidity and air volume entering the evaporator tube fins (8). The electronic expansion valve (12) is connected in series between the refrigerant inlet pipe (10) and the distributor (9). The low pressure sensor (15) at the return gas port is directly installed at the refrigeration return gas port (13) to collect the low pressure signal of the evaporation tube fins (8) in real time and transmit it to the intelligent controller (16). The intelligent controller (16) constructs a humidity-pressure dual closed-loop control system, synchronously receives humidity signals and low-pressure signals, and coordinates the opening of the electric guide plate (7), the operating frequency of the high-pressure centrifugal fan (3) and the opening of the refrigerant inlet of the electronic expansion valve (12) to achieve high humidity air bypass centrifugal dehumidification and low humidity air central heat exchange and refrigeration, thus doubly suppressing evaporator fin frosting and maintaining the optimal heat exchange efficiency of the refrigeration system. The dry, cold air that has been heated by the central evaporator heat exchange duct and the airflow that has been dehumidified by the annular centrifugal dehumidification bypass duct are mixed at the air outlet at the tail of the air cooler and then sent into the cold storage.
2. The cylindrical centrifugal dehumidification dual closed-loop intelligent anti-frost cold storage air cooler according to claim 1, characterized in that, The inner wall of the annular centrifugal dehumidification bypass duct is provided with an annular water collection chamber (17), and the bottom of the annular water collection chamber (17) is connected to a condensate drain outlet (18) for discharging the water condensed by centrifugal separation outside the machine.
3. The cylindrical centrifugal dehumidification dual closed-loop intelligent anti-frost cold storage air cooler according to claim 1, characterized in that, Under high humidity conditions, the intelligent controller (16) controls the electric guide plate (7) to reduce the opening of the central evaporator heat exchange duct and increase the opening of the annular centrifugal dehumidification bypass duct. At the same time, it reduces the opening of the electronic expansion valve (12) according to the signal of the low pressure sensor (15) at the return air port, thereby reducing the refrigerant supply and preventing the evaporator fins (8) from becoming too cold and exacerbating frost formation.
4. The cylindrical centrifugal dehumidification dual closed-loop intelligent anti-frost cold storage air cooler according to claim 1, characterized in that, Under low humidity conditions, the intelligent controller (16) controls the electric guide plate (7) to increase the opening of the heat exchange duct of the central evaporator, and at the same time adjusts the opening of the electronic expansion valve (12) according to the signal of the low pressure sensor (15) at the return air port, thereby improving the refrigerant supply and refrigeration heat exchange efficiency.
5. A cylindrical centrifugal dehumidification dual-closed-loop intelligent anti-frost cold storage air cooler according to claim 1, characterized in that, The high-pressure centrifugal fan (3) adopts a magnetic levitation / air suspension bearing (5) and is equipped with a centrifugal fan frequency converter (6) to achieve variable frequency speed regulation, and the output air pressure is adapted to the working conditions of centrifugal cyclone gas-water separation.
6. The cylindrical centrifugal dehumidification dual closed-loop intelligent anti-frost cold storage air cooler according to claim 1, characterized in that, The evaporator tube fins (8) are arranged in a ring and uniformly in the central evaporator heat exchange duct of the cylindrical inner shell (2), and exchange heat fully with the low-humidity air after the diversion.