Motor home refrigerating system

Abstract

The invention discloses a motor home refrigerating system which comprises an air supply system, an intelligent adjusting vortex tube assembly, an intelligent temperature control module and a noise reduction system. The air supply system comprises a multi-stage compression air compressor, an energy recovery device and a buffer air storage tank, the energy recovery device recovers braking energy through a pneumatic turbine, and a heat exchanger utilizes waste heat of exhaust gas of an engine and is matched with the multi-stage compression air compressor to improve the energy utilization efficiency; in the intelligent adjusting vortex tube assembly, a driving part drives an adjusting part to be opened and closed through a transmission structure, and dynamic adjustment of an air outlet is achieved; the intelligent temperature control module automatically adjusts the action of a component through a temperature sensor and an MCU controller with a built-in PID fuzzy control algorithm, breaks through the limitation of manual adjustment, and realizes high-precision constant temperature; the noise reduction piece and the spiral flow guide pipe of the noise reduction system can reduce operation noise. The transmission stability, the adjusting accuracy, the energy saving performance and the noise reduction effect are further improved through the optimized structure, and the overall performance of the system is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration applications, and in particular to a refrigeration system for a recreational vehicle. Background Art

[0002] As a unique vehicle that combines both residential and mobility functions, regulating the comfort of the interior environment of RVs has always been a key focus of the industry. The refrigeration system, as the core equipment for maintaining a suitable temperature within the RV, directly impacts the user's living experience. Due to the limited space and reliance on the onboard power system for energy supply, the refrigeration system must meet multiple requirements, including energy consumption, ease of adjustment, and operational stability, while ensuring cooling efficiency. The application of related technologies in the RV sector requires adaptation to the unique operating conditions of mobile scenarios.

[0003] Common RV cooling systems have significant deficiencies in energy utilization. Their air supply devices often rely on a single power source, failing to effectively utilize the braking energy and engine exhaust heat generated during RV operation. This results in significant consumption of the RV's existing energy resources and poor energy efficiency. Furthermore, traditional systems often manually adjust cooling output, requiring continuous human intervention and resulting in a delayed response to temperature changes, making it difficult to achieve high-precision constant temperature control. Furthermore, the cooling system's adjustment structure and temperature control module lack coordination, resulting in insufficient linkage between the adjustment component's actions and temperature control commands. This results in a low precision response to temperature changes within the RV, further impacting constant temperature stability and failing to meet the operational requirements of refrigeration applications. Therefore, a RV cooling system is proposed. Summary of the Invention

[0004] The present invention provides the following technical solution: a RV refrigeration system, comprising: An air supply system, an intelligently adjustable vortex tube assembly, an intelligent temperature control module, and a noise reduction system. The air supply system includes a multi-stage compression air compressor, an energy recovery device, and a buffer air storage tank. The air outlet of the buffer air storage tank is connected to the intelligently adjustable vortex tube assembly. The multi-stage compression air compressor improves air compression efficiency, the energy recovery device recovers idle energy during RV operation, and the buffer air storage tank ensures air supply stability. The combination of these three reduces the system's dependence on the RV's original energy source and improves energy efficiency. The intelligent adjustable vortex tube assembly includes a vortex tube, a mounting member is sleeved at the cold air outlet of the vortex tube, an assembly member is connected to the outer end of the mounting member, and a first transmission member is inserted into the inner cavity of the assembly member. The cooperation between the mounting member, the assembly member and the first transmission member provides a stable structural support for the subsequent action of the adjustment member, thereby ensuring the reliability of the airflow adjustment process; The adjusting member is installed at the center of the inner wall of the assembly. A driving member is installed on the outside of the assembly, and the outer end of the output shaft of the driving member is connected to the second transmission member. The outside of the adjusting member is clamped with a connecting member. A through hole is opened in the middle of the assembly. The driving member drives the adjusting member to open and close through the second transmission member, the first transmission member and the connecting member, thereby realizing dynamic adjustment of the air outlet size and cooperating with the intelligent temperature control module to accurately control the cooling air volume; An intelligent temperature control module comprises a temperature sensor, an MCU controller, and a human-computer interaction screen. The temperature sensor is installed inside the RV, and the MCU controller is integrated into the control terminal of the RV. A PID fuzzy control algorithm is internally provided in the MCU controller. The energy recovery device comprises an air turbine linked to the RV's braking system and a heat exchanger connected to the RV's engine exhaust pipe. The multi-stage compression air compressor and the energy recovery device are designed to be combined. The air turbine in the energy recovery device can recover the RV's braking energy, and the heat exchanger can utilize the waste heat of the engine exhaust. The two, together with the multi-stage compression air compressor, improve energy utilization efficiency, reduce the consumption of the RV's original energy, and make the system more energy-efficient and environmentally friendly during operation. At the same time, the temperature sensor in the intelligent temperature control module can sense the temperature inside the RV in real time and transmit this information to the MCU controller with a built-in PID fuzzy control algorithm. The MCU controller can control the operation of the intelligent adjustment vortex tube assembly based on the difference between the set temperature and the actual temperature, realizing automatic adjustment of the size of the vortex tube's cold air outlet. This breaks through the limitations of traditional manual adjustment and can quickly respond to temperature changes without human intervention, thereby achieving high-precision constant temperature control in the RV. The noise reduction system comprises a noise reduction component and a spiral flow guide pipe. The noise reduction component is installed outside the assembly component, and the spiral flow guide pipe is installed between the buffer air storage tank and the vortex tube.

[0005] Preferably, a through slot is provided at a position on the top of the assembly corresponding to the second transmission member, the second transmission member passes through the through slot, and the first transmission member cooperates with the second transmission member. The design of providing a through slot on the top of the assembly and the second transmission member passing through the through slot and cooperating with the first transmission member can provide a stable installation and movement space for the second transmission member, ensure the precise cooperation between the first transmission member and the second transmission member, ensure the smoothness of power transmission, reduce jamming during transmission, and improve the reliability of the action of the intelligent adjustment vortex tube assembly.

[0006] Preferably, a limiting groove is provided on the inner circumference of the first transmission member, a limiting member is inserted into the inner part of the limiting groove, the number of the adjusting members is 3-5 groups, the number of the limiting grooves and connecting members is the same as that of the adjusting members, the outer ends of the connecting members are inserted into the inner wall of the first transmission member, a limiting groove is provided in the first transmission member and a limiting member is inserted, and the number of adjusting members, limiting grooves and connecting members matches, and the connecting member is inserted into the inner wall of the first transmission member. The movement trajectory of the first transmission member can be limited by the cooperation of the limiting groove and the limiting member to avoid its deviation, while ensuring that multiple adjusting members move in coordination under the drive of the connecting member, thereby improving the accuracy and consistency of the opening and closing of the adjusting members.

[0007] Preferably, the noise reduction component is a honeycomb structure, and a matching component is provided on the outside of the noise reduction component. The center of the noise reduction component coincides with the center of the through hole, and the outside of the matching component is connected to the corresponding position on the outside of the assembly component. The noise reduction component adopts a honeycomb structure and is provided with a matching component on the outside. The design of the center coinciding with the through hole and the matching component connected to the assembly component can allow the airflow to accurately enter the honeycomb noise reduction component after passing through the through hole. The matching component can firmly fix the noise reduction component, enhance the integrity of the noise reduction structure, give full play to the noise reduction effect of the honeycomb structure, and effectively reduce the noise when the airflow passes through.

[0008] Preferably, the gas outlet of the buffer gas storage tank is installed with a solenoid valve, the interior of the buffer gas storage tank is installed with a pressure sensor, and the inner wall of the buffer gas storage tank is covered with a nanoporous thermal insulation material layer. The buffer gas storage tank is designed to have a solenoid valve installed at the gas outlet, a pressure sensor installed inside, and a nanoporous thermal insulation material layer laid on the inner wall. The solenoid valve and the pressure sensor can cooperate to regulate the gas output in the tank in real time and maintain a stable gas supply pressure. The thermal insulation material layer can reduce the heat exchange between the gas in the tank and the outside world, keep the gas state stable, and ensure the stability of the gas supply to the vortex tube assembly.

[0009] Preferably, the multi-stage compression air compressor adopts a dual-power drive mode, and the first-stage compression unit of the multi-stage compression air compressor is selectively connected to the power output end of the RV engine through a clutch device, and the secondary compression unit of the multi-stage compression air compressor is electrically connected to the on-board battery or solar power supply system. The multi-stage compression air compressor adopts a dual-power drive mode, and the first stage is connected to the engine through a clutch device and the secondary is connected to the on-board battery or solar power system. The design can flexibly switch the power source according to the operating status and energy conditions of the RV, make full use of different energy sources, reduce dependence on a single energy source, and further improve the energy saving and operational adaptability of the system.

[0010] Preferably, the pneumatic turbine is connected to the input shaft of the multi-stage compression air compressor through a transmission shaft, a one-way transmission structure is provided inside the shell of the pneumatic turbine, the heat exchanger adopts a sleeve-type structure, the inner pipe of the heat exchanger circulates the air to be compressed, and the outer layer of the heat exchanger circulates the engine exhaust gas. The pneumatic turbine is connected to the air compressor input shaft through a transmission shaft and is provided with a one-way transmission structure. The heat exchanger adopts a sleeve-type design and the inner and outer layers circulate the air to be compressed and the exhaust gas respectively, which can efficiently transmit the braking energy recovered by the pneumatic turbine. The one-way structure avoids reverse energy loss. The heat exchanger can make full use of the waste heat of the exhaust gas to preheat the air, improve the compression efficiency of the air compressor, and enhance the energy recovery effect.

[0011] Preferably, the driving member is a stepper motor with a self-locking function, and the outer shell of the driving member is fixedly connected to the outer wall of the assembly member through a bracket, and the connection part between the output shaft of the driving member and the second transmission member is provided with a keyway matching structure and axially locked by a fastening nut. The driving member is a stepper motor with a self-locking function, which is fixed by the bracket and the output shaft is keyway matched with the second transmission member and axially locked. The self-locking function can keep the adjustment member stably in the set position, and the bracket fixation reduces the impact of motor operation vibration. The keyway matching and axial locking ensure that the power transmission is accurate and firm, improve the stability of the drive and transmission, and ensure the movement accuracy of the adjustment member.

[0012] Preferably, the honeycomb structure of the noise reduction component is provided with staggered guide plates, the surface of the guide plates is wavy, and the matching component adopts a double-layer sound insulation structure, the inner layer of the matching component is a metal sheet, and the outer layer of the matching component is a flexible sound insulation material. The honeycomb structure of the noise reduction component is provided with staggered wavy guide plates, and the matching component is designed with a double-layer sound insulation structure. The guide plates can change the airflow path and enhance the attenuation of sound waves. The double-layer sound insulation matching component can further block the propagation of noise. The two work together to significantly improve the noise reduction effect of the system and reduce noise interference to the internal environment of the RV.

[0013] Preferably, the limiter is made of wear-resistant alloy material, the outer end of the limiter is fixed to the inner wall of the assembly part through a threaded structure, the inner end of the limiter is embedded in the limit groove and a gap is reserved between the inner end and the groove wall. The limiter is made of wear-resistant alloy material, the outer end is fixed by thread and the inner end is embedded in the limit groove with a reserved gap. The wear-resistant material extends the service life of the limiter, the threaded fixation ensures a stable installation, the gap reduces movement friction, ensures the smooth movement of the first transmission part while accurately limiting, and improves the reliability and durability of the limiter structure.

[0014] In summary, compared with the prior art, the present invention provides a RV refrigeration system with the following beneficial effects: 1. The present invention adopts a design that combines a multi-stage compression air compressor with an energy recovery device. The pneumatic turbine in the energy recovery device can recover the braking energy of the RV, and the heat exchanger can utilize the waste heat of the engine exhaust. The two work together with the multi-stage compression air compressor to improve energy utilization efficiency and reduce the consumption of the original energy of the RV, making the system more energy-efficient and environmentally friendly during operation. At the same time, the temperature sensor in the intelligent temperature control module can sense the temperature inside the RV in real time and transmit the information to the MCU controller with a built-in PID fuzzy control algorithm. The MCU controller can control the action of the intelligent adjustment vortex tube assembly according to the difference between the set temperature and the actual temperature, and realize automatic adjustment of the size of the vortex tube cold air outlet. This breaks through the limitations of traditional manual adjustment and can quickly respond to temperature changes without human intervention, thereby realizing high-precision constant temperature control in the RV. 2. The present invention drives the rotation of the second transmission member through the driving member, so that the adjusting member can be opened and closed under the drive of the first transmission member and the connecting member, and then can form a coordinated control with the intelligent temperature control module, so that the driving member can adjust the size of the vortex tube air outlet in real time according to the instructions issued by the MCU controller, so that the system can respond more accurately to the temperature changes in various areas of the RV, further improve the actual control effect of the PID fuzzy control algorithm, and enhance the constant temperature stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a system architecture block diagram of the present invention.

[0016] Figure 2 It is a schematic structural diagram of the vortex tube of the present invention.

[0017] Figure 3 It is a schematic diagram of the internal structure of the assembly of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the first transmission member of the present invention.

[0019] Figure 5 It is a schematic diagram of the assembly structure of the matching parts and the assembly parts of the present invention.

[0020] Description of reference numerals: 1. Vortex tube; 2. Mounting part; 3. Assembly part; 4. First transmission part; 5. Adjustment part; 6. Driving part; 7. Through slot; 8. Second transmission part; 9. Connecting part; 10. Limiting slot; 11. Limiting part; 12. Through hole; 13. Matching part; 14. Noise reduction part. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1 The present invention provides a technical solution, a motorhome refrigeration system, including a vortex tube 1, a mounting part 2, an assembly part 3, a first transmission part 4, an adjustment part 5, a driving part 6, a through groove 7, a second transmission part 8, a connecting part 9, a limiting groove 10, a limiting part 11, a through hole 12, a matching part 13, a noise reduction part 14, an air supply system, an intelligent adjustment vortex tube assembly, an intelligent temperature control module and a noise reduction system: The air supply system includes a multi-stage compression air compressor, an energy recovery device and a buffer air storage tank, and the air outlet of the buffer air storage tank is connected to the intelligent adjustment vortex tube assembly; Intelligent adjustment vortex tube assembly, including vortex tube 1, see Figure 2 The cold air outlet of the vortex tube 1 is provided with a mounting member 2, the outer annular sleeve structure of the mounting member 2 is provided, the outer end of the mounting member 2 is connected to the assembly member 3, and the assembly member 3 is connected to the outside of the vortex tube 1 through a screw. Figure 3 , the inner cavity of the assembly part 3 is inserted with a first transmission part 4, the assembly part 3 is a hollow disc structure, and the first transmission part 4 is a gear ring structure; The adjusting member 5 is installed at the center of the inner wall of the assembly part 3. The adjusting member 5 is a teardrop-shaped baffle structure. The driving member 6 is installed on the outside of the assembly part 3, and the outer end of the output shaft of the driving member 6 is connected to the second transmission member 8. The second transmission member 8 is a gear. The outer part of the adjusting member 5 is connected to the connecting member 9. Figure 5 , a through hole 12 is opened in the middle of the assembly part 3, please refer to Figure 3 A through slot 7 is provided at the top of the assembly part 3 at a position corresponding to the second transmission part 8. The second transmission part 8 passes through the through slot 7. The first transmission part 4 cooperates with the second transmission part 8. Please refer to Figure 4, a limiting groove 10 is provided on the inner circumference of the first transmission member 4, and a limiting member 11 is inserted into the inner part of the limiting groove 10. The limiting member 11 is a bolt structure. The number of adjusting members 5 is 3-5 groups. The number of limiting grooves 10 and connecting members 9 is the same as that of adjusting members 5. The outer ends of the connecting members 9 are inserted into the inner wall of the first transmission member 4. The driving member 6 is a stepping motor with a self-locking function. The outer shell of the driving member 6 is fixedly connected to the outer wall of the assembly member 3 through a bracket. The connection part between the output shaft of the driving member 6 and the second transmission member 8 is provided with a keyway matching structure and is axially locked by a fastening nut. The limiting member 11 is made of wear-resistant alloy material. The outer end of the limiting member 11 is fixed to the inner wall of the assembly member 3 through a threaded structure. The inner end of the limiting member 11 is embedded in the limiting groove 10 and a gap is reserved between it and the groove wall; An intelligent temperature control module includes a temperature sensor, an MCU controller and a human-computer interaction screen. The temperature sensor is installed inside the RV, and the MCU controller is integrated into the control end of the RV. A PID fuzzy control algorithm is set inside the MCU controller. The energy recovery device includes an air turbine linked to the RV braking system and a heat exchanger connected to the exhaust pipe of the RV engine. An electromagnetic valve is installed at the air outlet of the buffer air tank, and a pressure sensor is installed inside the buffer air tank. A nanoporous insulation material layer is laid on the inner wall of the buffer air tank. The multi-stage compression air compressor adopts a dual-power drive mode. The first-stage compression unit of the multi-stage compression air compressor is selectively connected to the power output end of the RV engine through a clutch device, and the secondary compression unit of the multi-stage compression air compressor is electrically connected to the on-board battery or solar power supply system. The air turbine is connected to the input shaft of the multi-stage compression air compressor through a drive shaft. A one-way transmission structure is set inside the shell of the air turbine. The heat exchanger adopts a sleeve structure. The inner pipe of the heat exchanger circulates the air to be compressed, and the outer layer of the heat exchanger circulates the engine exhaust gas. Regarding the design of combining a multi-stage compression air compressor with an energy recovery device, the specific implementation process of the pneumatic turbine in the energy recovery device to recover the braking energy of the RV is as follows; System startup and initialization phase: The operator turns on the refrigeration system through the human-machine interface, and the intelligent temperature control module immediately initiates a self-test program. The temperature sensor collects real-time temperature data from various areas within the RV. The MCU controller initializes the PID fuzzy control algorithm based on preset parameters, while also checking the pressure sensor signal and solenoid valve status in the buffer air tank. At this point, the multi-stage compression air compressor is in standby mode, with its first-stage compression unit disconnected from the RV engine, and the secondary compression unit pre-started via the onboard battery or solar power system. Braking energy recovery execution process: When the RV enters a deceleration or downhill condition, the braking system triggers the energy recovery device. The pneumatic turbine is connected to the input shaft of the multi-stage compression air compressor through the drive shaft. At this time, the one-way transmission structure in the turbine housing automatically locks the reverse rotation to ensure that the braking energy is only used to drive the air compressor. The pneumatic turbine converts the vehicle's kinetic energy into rotational power, driving the first-stage compression unit of the air compressor to perform primary compression of the air. The compressed air is heat exchanged with the engine exhaust gas through the heat exchanger, and the temperature is raised to the required working range before being input into the buffer air tank. During this process, the secondary compression unit of the air compressor dynamically adjusts the operating frequency according to the feedback signal of the air tank pressure sensor. When the pressure in the tank is lower than the set threshold, the secondary unit automatically starts and works in conjunction with the primary unit; Engine exhaust heat recovery process: The heat exchanger utilizes a shell-and-tube design, with the inner tube carrying primary compressed air and the outer interlayer carrying the engine's high-temperature exhaust. The exhaust creates a countercurrent heat exchange within the interlayer, transferring heat to the inner air, raising its temperature to over 80°C. A temperature monitoring point is located at the heat exchanger outlet. When the exhaust gas temperature is detected to be below 200°C, the system automatically closes the pneumatic turbine inlet valve and switches to a separate air supply mode for the secondary compression unit, avoiding inefficient energy conversion. Air compression and storage management: The multi-stage compression air compressor adopts a three-stage transformer design, and the compression chambers at each stage are connected by a connecting pipe with a one-way valve. The primary compressed air enters the buffer air storage tank after heat exchange. The nano-porous insulation material layer laid in the tank effectively reduces heat loss. The pressure sensor monitors the pressure in the tank in real time. When the set value is reached, the MCU controller sends a command to close the solenoid valve and stop the air input; when the pressure is lower than the safe value, the system automatically starts the secondary compression unit to replenish air. The conical structure at the bottom of the air storage tank guides the condensed water to the electronic drain valve, and the drainage cycle is dynamically adjusted by the controller according to the humidity sensor signal; Temperature control and regulation mechanism: The intelligent regulation vortex tube assembly is started according to the instruction of the MCU controller. The driving part drives the second transmission part to rotate, and drives the first transmission part to rotate through gear engagement. The limit groove on the inner wall of the first transmission part cooperates with the limit part to ensure transmission stability. The regulating part adjusts the opening and closing angle under the action of the driving part to change the air volume distribution of the cold air outlet. The PID fuzzy control algorithm uses the temperature deviation and the deviation change rate as input to dynamically adjust the opening of the solenoid valve and the speed of the driving part. When the temperature deviation is greater than 3°C, it enters the forced cooling mode. When the deviation is within the range of ±1°C, it switches to the fine adjustment mode to ensure that the temperature fluctuation inside the RV does not exceed 0.5°C. The noise reduction system operates as follows: After compressed air is discharged from the buffer air tank, it enters the vortex tube through the spiral guide tube. Axial ribs on the inner wall of the guide tube disrupt air vortexes, reducing turbulent noise. The noise reduction component's honeycomb structure and staggered wavy guide plates absorb noise of varying frequencies in a graded manner. The mating component's double-layer sound insulation further isolates vibration transmission. The entire noise reduction system forms a dual-stage noise reduction structure at the assembly's air inlet and outlet. Emergency mode and system protection: When the vehicle's battery is low or the solar power system fails, the multi-stage air compressor automatically switches to engine-powered mode. The clutch device then reestablishes the power connection between the first-stage compression unit and the engine. If the buffer tank pressure rises abnormally, the safety valve automatically opens to release the pressure. At the same time, the MCU controller issues an alarm through the human-machine interface, prompting the operator to check the system status. System shutdown and data storage: After the operator shuts down the refrigeration system through the human-machine interface, the MCU controller executes the shutdown procedure and saves the temperature curve, pressure change and other data of this operation to the storage module. At this time, the drive element returns to zero position, the adjustment element returns to the initial angle, the solenoid valve closes, the transmission connection between the pneumatic turbine and the air compressor is disconnected, and the entire system enters a low-power standby state; See also Figure 1 , the noise reduction system includes a noise reduction member 14 and a spiral guide tube, see Figure 5 The noise reduction component 14 is installed on the outside of the assembly part 3, and the spiral guide tube is installed between the buffer air storage tank and the vortex tube 1. The noise reduction component 14 has a honeycomb structure. The outer part of the noise reduction component 14 is sleeved with a matching component 13. The center of the noise reduction component 14 coincides with the center of the through hole 12. The outer part of the matching component 13 is connected to the corresponding position of the outer part of the assembly part 3. The honeycomb structure of the noise reduction component 14 is internally provided with staggered guide plates, and the surface of the guide plates is wavy. The matching component 13 adopts a double-layer sound insulation structure. The inner layer of the matching component 13 is a metal sheet, and the outer layer of the matching component 13 is a flexible sound insulation material.

[0023] This solution adopts a design that combines a multi-stage compression air compressor with an energy recovery device. The pneumatic turbine in the energy recovery device can recover the braking energy of the RV, and the heat exchanger can utilize the waste heat of the engine exhaust. The two work together with the multi-stage compression air compressor to improve energy utilization efficiency and reduce the consumption of the original energy of the RV, making the system more energy-efficient and environmentally friendly during operation. At the same time, the temperature sensor in the intelligent temperature control module can sense the temperature inside the RV in real time and transmit the information to the MCU controller with a built-in PID fuzzy control algorithm. The MCU controller can control the action of the intelligent adjustment vortex tube component according to the difference between the set temperature and the actual temperature, and realize automatic adjustment of the size of the cold air outlet of the vortex tube 1, breaking through the limitations of traditional manual adjustment. It can quickly respond to temperature changes without human intervention, thereby realizing high-precision constant temperature control in the RV. The specific implementation process is as follows; Temperature data collection phase: Multiple temperature sensors pre-installed inside the RV are activated simultaneously to monitor the temperature of the driving area, rest area, and storage area. The sensors use a three-wire PT100 platinum resistance thermometer to sense the ambient temperature in real time through contact temperature measurement. Data is collected every 2 seconds and converted into an electrical signal, which is then transmitted to the MCU controller via a shielded cable. Control algorithm operation phase: After the MCU controller receives the temperature signal, it immediately activates the built-in PID fuzzy control algorithm. The algorithm first calculates the deviation range between the temperature of each zone and the set value, and combines historical temperature change trends to predict future temperature trends. When a temperature deviation of more than 1.5°C is detected in a certain area, the system automatically determines that the operating conditions need to be adjusted and divides the control level according to the deviation: deviations above 3°C enter forced cooling mode, 1-3°C range enters normal adjustment mode, and within 1°C, fine-tuning hold mode is activated; Drive command generation: Based on the control algorithm's output, the MCU generates a corresponding pulse-width modulation signal. This signal is transmitted via the CAN bus to driver 6 (a self-locking stepper motor). The command includes parameters such as rotation direction, step angle, and holding torque. For example, to increase the cooling airflow, the controller issues a forward rotation command, causing driver 6 to rotate at a rate of 60 steps per second. During the mechanical transmission execution phase, upon receiving the command, the output shaft of driver 6 rotates second transmission member 8 (gear) via a keyway. This second transmission member 8 meshes with first transmission member 4 (gear ring structure), forcing the first transmission member to move circumferentially within the hollow disk of assembly member 3. A retaining groove 10 on the inner wall of the first transmission member forms a sliding fit with retaining member 11 (a wear-resistant alloy bolt), ensuring no radial offset during transmission. Cold air outlet adjustment stage: The rotation of the first transmission member 4 is transmitted to the adjustment member 5 (a teardrop-shaped baffle) via the connecting member 9 (a transmission rod with elastic claws). The adjustment member opens and closes around the center of the assembly member 3. Its curved teardrop-shaped structure smoothly changes the effective ventilation area of ​​the cold air outlet. When the adjustment member expands outward, the cross-sectional area of ​​the cold air outlet increases, and vice versa, it decreases, thus achieving stepless adjustment of the air volume. During the state feedback verification phase, the encoder built into the driver 6 provides real-time feedback on the rotation angle, which is then compared with the command value from the MCU controller. If the actual angle deviates from the target value by more than 2%, the system automatically initiates a compensation process, fine-tuning the pulse signal to correct the driver position. Simultaneously, the pressure sensor in the buffer tank monitors the supply pressure. When the pressure falls below the safety threshold, the controller prioritizes basic cooling needs and suspends fine-tuning mode. Multi-zone coordinated control: For RV spaces with multiple temperature differences, the MCU controller adopts a zoning control strategy. For example, if the driving area meets the required temperature but the rest area still needs to be cooled, the system adjusts the opening of the corresponding zone's control elements to achieve targeted cooling. Each zone's control elements operate independently, but an algorithm coordinates them to avoid system pressure fluctuations caused by excessive adjustment of the cooling air outlet. Abnormal state handling stage: If the temperature sensor detects an abnormally high temperature (such as exceeding 40°C) or a drive component stalls, the MCU controller immediately executes the emergency procedure: closing the solenoid valve to stop the air supply, starting the backup cooling fan, and displaying the fault code on the human-computer interaction screen. At this time, the adjustment component automatically resets to the maximum opening position to ensure the continuous operation of the basic cooling function; Operation Recording and Learning Phase: After each system operation, the MCU controller stores data such as the temperature control curve and the frequency of driver operation in non-volatile memory. Through long-term data accumulation, the control algorithm can automatically optimize PID parameters. For example, it can adjust the temperature response speed based on user habits, gradually adapting the system to the specific RV usage scenario. System Sleep and Wake-Up: When the RV power supply switches to low-power mode, the intelligent temperature control module enters standby mode. Driver 6 remains locked to prevent accidental movement of the control unit, and the temperature sensor reduces its frequency to collect data every 30 seconds. If the temperature rises by 2°C above the set point, the system automatically wakes up and performs a single adjustment cycle to maintain a basic temperature balance within the RV.

[0024] This solution drives the rotation of the second transmission member 8 through the driving member 6, so that the adjustment member 5 can be opened and closed under the drive of the first transmission member 4 and the connecting member 9, and then can form a coordinated control with the intelligent temperature control module, so that the driving member 6 can adjust the size of the air outlet of the vortex tube 1 in real time according to the instructions issued by the MCU controller, so that the system can respond more accurately to the temperature changes in various areas of the RV, further improve the actual control effect of the PID fuzzy control algorithm, and enhance the constant temperature stability.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0026] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A refrigeration system for a recreational vehicle, characterized in that: include: An air supply system, an intelligent adjustable vortex tube assembly, an intelligent temperature control module, and a noise reduction system. The air supply system includes a multi-stage compression air compressor, an energy recovery device, and a buffer air storage tank. The air outlet of the buffer air storage tank is connected to the intelligent adjustable vortex tube assembly. An intelligent adjustable vortex tube assembly comprises a vortex tube (1), wherein a mounting member (2) is sleeved at a cold air outlet of the vortex tube (1), an outer end of the mounting member (2) is connected to an assembly member (3), and a first transmission member (4) is inserted into an inner cavity of the assembly member (3); An adjusting member (5) is mounted at the center of the inner wall of the assembly member (3); a driving member (6) is mounted on the outside of the assembly member (3); an output shaft of the driving member (6) is connected to a second transmission member (8); a connecting member (9) is clamped on the outside of the adjusting member (5); and a through hole (12) is opened in the middle of the assembly member (3); An intelligent temperature control module includes a temperature sensor, an MCU controller, and a human-computer interaction screen. The temperature sensor is installed inside the RV, and the MCU controller is integrated into the control terminal of the RV. A PID fuzzy control algorithm is configured inside the MCU controller. The energy recovery device includes a pneumatic turbine linked to the RV's braking system and a heat exchanger connected to the RV's engine exhaust pipe. The noise reduction system comprises a noise reduction component (14) and a spiral flow guide pipe, wherein the noise reduction component (14) is installed outside the assembly component (3), and the spiral flow guide pipe is installed between the buffer gas storage tank and the vortex tube (1).

2. The RV refrigeration system according to claim 1, characterized in that: A through slot (7) is provided at a position on the top of the assembly part (3) corresponding to the second transmission part (8), the second transmission part (8) passes through the through slot (7), and the first transmission part (4) and the second transmission part (8) cooperate with each other.

3. The RV refrigeration system according to claim 1, characterized in that: A limiting groove (10) is provided on the inner circumference of the first transmission member (4), and a limiting member (11) is inserted into the inner portion of the limiting groove (10). The number of the adjusting members (5) is 3-5 groups, and the number of the limiting grooves (10) and the connecting members (9) is the same as that of the adjusting members (5). The outer ends of the connecting members (9) are all inserted into the inner wall of the first transmission member (4).

4. The RV refrigeration system according to claim 1, characterized in that: The noise reduction component (14) is a honeycomb structure. The exterior of the noise reduction component (14) is provided with a matching component (13). The center of the noise reduction component (14) coincides with the center of the through hole (12). The exterior of the matching component (13) is connected to a corresponding position on the exterior of the assembly component (3).

5. The RV refrigeration system according to claim 1, characterized in that: The gas outlet of the buffer gas storage tank is installed with a solenoid valve, the interior of the buffer gas storage tank is installed with a pressure sensor, and the inner wall of the buffer gas storage tank is covered with a nano porous thermal insulation material layer.

6. The RV refrigeration system according to claim 1, characterized in that: The multi-stage compression air compressor adopts a dual-power drive mode. The first-stage compression unit of the multi-stage compression air compressor is selectively connected to the power output end of the RV engine through a clutch device, and the secondary compression unit of the multi-stage compression air compressor is electrically connected to the vehicle battery or solar power supply system.

7. The RV refrigeration system according to claim 1, characterized in that: The pneumatic turbine is connected to the input shaft of the multi-stage compression air compressor through a transmission shaft. A one-way transmission structure is provided inside the shell of the pneumatic turbine. The heat exchanger adopts a sleeve-type structure. The inner layer of the heat exchanger circulates the air to be compressed, and the outer layer of the heat exchanger circulates the engine exhaust gas.

8. The RV refrigeration system according to claim 1, characterized in that: The driving member (6) is a stepping motor with a self-locking function. The housing of the driving member (6) is fixedly connected to the outer wall of the assembly member (3) through a bracket. The connection portion between the output shaft of the driving member (6) and the second transmission member (8) is provided with a keyway matching structure and is axially locked by a fastening nut.

9. The RV refrigeration system according to claim 4, characterized in that: The honeycomb structure of the noise reduction component (14) is internally provided with staggered guide plates, the surface of the guide plates is wavy, and the matching component (13) adopts a double-layer sound insulation structure, the inner layer of the matching component (13) is a metal thin plate, and the outer layer of the matching component (13) is a flexible sound insulation material.

10. The RV refrigeration system according to claim 3, characterized in that: The limiting member (11) is made of a wear-resistant alloy material, the outer end of the limiting member (11) is fixed to the inner wall of the assembly member (3) through a threaded structure, and the inner end of the limiting member (11) is embedded in the limiting groove (10) with a gap reserved between the limiting member and the groove wall.

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