Refrigeration system for a recreational vehicle

Abstract

The application discloses a kind of motor home refrigeration systems, including air supply system, intelligent adjustment vortex tube component, intelligent temperature control module and noise reduction system.Air supply system contains multistage compression air compressor, energy recovery device and buffer gas storage tank, energy recovery device recovers brake energy by pneumatic turbine, heat exchanger utilizes engine exhaust waste heat, and is cooperated with multistage compression air compressor to improve energy utilization efficiency;In intelligent adjustment vortex tube component, driving part is driven to open and close adjusting part by transmission structure, and realizes dynamic adjustment of air outlet;Temperature sensor, MCU controller with built-in PID fuzzy control algorithm are used in intelligent temperature control module, automatically adjust component action, break through the limitation of manual adjustment, realize high-precision constant temperature;Noise reduction system's noise reduction piece and spiral guide vane can reduce operating noise.The preferred structure further improves transmission stability, adjustment accuracy, energy saving and noise reduction effect, and enhances the overall performance of system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration applications, in particular to a recreational vehicle refrigeration system. BACKGROUND

[0002] As a special carrier integrating living and moving functions, the comfort regulation of the internal environment of a recreational vehicle has always been the focus of the industry. As the core equipment for ensuring the appropriate temperature inside the recreational vehicle, the refrigeration system directly affects the user's living experience. Due to the limited space of the recreational vehicle and the dependence on the vehicle-mounted power system for energy supply, the refrigeration system needs to meet multiple requirements such as refrigeration effect, energy consumption, adjustment convenience, and operation stability. The application of related technology in the field of recreational vehicles needs to adapt to the special working conditions in the mobile scenario.

[0003] The common recreational vehicle refrigeration system has obvious deficiencies in energy utilization. The air supply device of the system relies on single power driving, and does not effectively utilize the braking energy and engine exhaust waste heat generated during the operation of the recreational vehicle, resulting in a large original energy consumption of the recreational vehicle and poor energy saving. At the same time, in terms of temperature regulation, the traditional system adjusts the refrigeration output in a manual manner, which not only requires continuous manual intervention, but also has a lag response to temperature changes, making it difficult to achieve high-precision constant temperature control. In addition, the adjustment structure and temperature control module of the refrigeration system lack coordination, and the linkage between the action of the adjustment component and the temperature control instruction is insufficient, resulting in low response accuracy to temperature changes in different areas of the recreational vehicle, further affecting the constant temperature stability, and failing to meet the working requirements of the refrigeration application. Therefore, a recreational vehicle refrigeration system is proposed. SUMMARY

[0004] The present application provides the following technical scheme: a recreational vehicle refrigeration system, comprising:

[0005] An air supply system, an intelligent adjustment 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 gas storage tank. The gas outlet of the buffer gas storage tank is connected to the intelligent adjustment vortex tube assembly. The multi-stage compression air compressor can improve air compression efficiency. The energy recovery device can recover idle energy during the operation of the recreational vehicle. The buffer gas storage tank ensures the stability of air supply. The combination of the three reduces the dependence of the system on the original energy of the recreational vehicle and improves energy saving.

[0006] The intelligent adjustment vortex tube assembly comprises a vortex tube. A mounting piece is sleeved at the cold air outlet of the vortex tube. An assembly piece is connected to the outer end of the mounting piece. A first transmission piece is inserted into the inner cavity of the assembly piece. The cooperation of the mounting piece, the assembly piece, and the first transmission piece provides stable structural support for the action of the subsequent adjustment component, ensuring the reliability of the air flow adjustment process.

[0007] The adjusting piece is installed at the center of the inner wall of the assembling piece, the outside of the assembling piece is provided with the driving piece, the output shaft of the driving piece is connected with the second transmission piece, the outside of the adjusting piece is connected with the connecting piece, the middle part of the assembling piece is provided with the through hole, the driving piece drives the adjusting piece to open and close through the second transmission piece, the first transmission piece and the connecting piece, the size of the air outlet is dynamically adjusted, and the intelligent temperature control module is used for accurately controlling the cold air volume.

[0008] The intelligent temperature control module comprises a temperature sensor, an MCU controller and a man-machine interaction screen, the temperature sensor is arranged in the house car, the MCU controller is integrated in the control end of the house car, the inside of the MCU controller is provided with a PID fuzzy control algorithm, the energy recovery device comprises a pneumatic turbine connected with the brake system of the house car and a heat exchanger connected with the exhaust pipe of the engine of the house car, the multi-stage compression air compressor is combined with the energy recovery device, the pneumatic turbine in the energy recovery device can recover the brake energy of the house car, the heat exchanger can utilize the waste heat of the engine exhaust, and the multi-stage compression air compressor is combined with the pneumatic turbine and the heat exchanger, so that the energy utilization efficiency is improved, the consumption of the original energy of the house car is reduced, the system is more energy-saving and environment-friendly in the running process, the temperature sensor in the intelligent temperature control module can sense the temperature in the house car in real time, and information is transmitted to the MCU controller with the PID fuzzy control algorithm, the MCU controller can control the intelligent adjusting vortex tube assembly according to the difference between the set temperature and the actual temperature, automatically adjust the size of the vortex tube cold air outlet, break through the limitation of traditional manual adjustment, quickly respond to temperature changes without manual intervention, and thus high-precision constant temperature control in the house car is realized.

[0009] The noise reduction system comprises a noise reduction piece and a spiral guide pipe, the noise reduction piece is arranged outside the assembling piece, and the spiral guide pipe is arranged between the buffer gas storage tank and the vortex tube.

[0010] Preferably, a through groove is formed in the top of the assembling piece at a position corresponding to the second transmission piece, the second transmission piece penetrates through the through groove, and the first transmission piece cooperates with the second transmission piece, the design that the through groove is formed in the top of the assembling piece and the second transmission piece penetrates through the through groove and cooperates with the first transmission piece can provide stable installation and movement space for the second transmission piece, ensure accurate cooperation between the first transmission piece and the second transmission piece, guarantee smoothness of power transmission, reduce jamming in the transmission process, and improve reliability of the intelligent adjusting vortex tube assembly.

[0011] Preferably, the first transmission member is internally circumferentially provided with a limiting groove, the limiting groove is internally provided with a limiting member, the number of the adjusting members is 3-5 groups, the number of the limiting grooves and the 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, the limiting groove is internally provided with the limiting member, and the number of the adjusting members, the limiting grooves and the connecting members is matched, and the connecting members are inserted into the inner wall of the first transmission member, which can limit the movement track of the first transmission member through the cooperation of the limiting groove and the limiting member, avoid its deviation, and ensure the coordinated action of the plurality of adjusting members under the driving of the connecting members, thereby improving the precision and consistency of the opening and closing of the adjusting members.

[0012] Preferably, the noise reduction member is a honeycomb structure, the noise reduction member is externally provided with a cooperating member, the center of the noise reduction member coincides with the center of the through hole, and the outer part of the cooperating member is connected with the corresponding position of the outer part of the assembling member, which can make the airflow accurately enter the honeycomb noise reduction member after passing through the through hole, the cooperating member can stably fix the noise reduction member, enhance the integrity of the noise reduction structure, fully play the noise reduction effect of the honeycomb structure, and effectively reduce the noise when the airflow passes through.

[0013] Preferably, the electromagnetic valve is installed at the gas outlet of the buffer gas storage tank, the pressure sensor is installed in the buffer gas storage tank, and the nanometer porous heat insulation material layer is applied to the inner wall of the buffer gas storage tank, which can realize real-time regulation and control of the gas output in the tank through the cooperation of the electromagnetic valve and the pressure sensor, maintain the stability of the gas supply pressure, reduce the heat exchange between the gas in the tank and the outside through the heat insulation material layer, keep the gas state stable, and ensure the stability of the gas supply to the vortex tube assembly.

[0014] Preferably, the multi-stage compression air compressor adopts a double-power driving mode, the primary compression unit of the multi-stage compression air compressor is selectively connected with the power output end of the motor home through a clutch device, and the secondary compression unit of the multi-stage compression air compressor is electrically connected with the vehicle-mounted storage battery or a solar power supply system, which can flexibly switch the power source according to the running state of the motor home and the energy situation, fully utilize different energy sources, reduce the dependence on a single energy source, and further improve the energy saving and operation adaptability of the system.

[0015] Preferably, the gas turbine is connected with the input shaft of the multi-stage compression air compressor through a transmission shaft, the inside of the shell of the gas turbine is provided with a one-way transmission structure, and the heat exchanger adopts a double-pipe structure, the inner pipe of the heat exchanger flows the air to be compressed, and the outer layer of the heat exchanger flows the engine exhaust gas, the gas turbine is connected with the input shaft of the air compressor through a transmission shaft and is provided with a one-way transmission structure, the heat exchanger adopts a double-pipe structure and the inner and outer layers thereof flow the air to be compressed and the exhaust gas respectively, the design can efficiently transfer the braking energy recovered by the gas turbine, the one-way structure avoids reverse energy loss, and the heat exchanger can fully utilize the waste heat of the exhaust gas to preheat the air, thereby improving the compression efficiency of the air compressor and enhancing the energy recovery effect.

[0016] Preferably, the driving member is a step motor with a self-locking function, the shell of the driving member is fixedly connected with the outer wall of the assembly member through a support, and the connecting part of the output shaft of the driving member and the second transmission member is provided with a key groove matching structure and is axially locked through a fastening nut, the driving member is a step motor with a self-locking function, is fixed through a support, and the output shaft is matched with the key groove of the second transmission member and is axially locked, the self-locking function can stably keep the adjusting member at the set position, the support fixing reduces the influence of motor operation vibration, the key groove matching and axial locking ensure accurate and firm power transmission, improve the stability of driving and transmission, and guarantee the action accuracy of the adjusting member.

[0017] Preferably, the honeycomb structure of the noise reduction member is provided with staggered guide plates, the surface of the guide plate is in a wave shape, the matching member adopts a double-layer sound insulation structure, the inner layer of the matching member is a metal sheet, and the outer layer of the matching member is a flexible sound insulation material, the design that the honeycomb structure of the noise reduction member is provided with staggered wave-shaped guide plates and the matching member adopts a double-layer sound insulation structure can change the airflow path, enhance the sound wave attenuation, further block the noise propagation through the double-layer sound insulation matching member, and significantly improve the noise reduction effect of the system through the synergistic effect, thereby reducing the noise interference on the interior environment of the motor home.

[0018] Preferably, the limiting member is made of wear-resistant alloy material, the outer end of the limiting member is fixedly connected with the inner wall of the assembly member through a threaded structure, and the inner end of the limiting member is embedded in the limiting groove and a gap is reserved between the inner end and the groove wall, the limiting member is made of wear-resistant alloy material, the outer end is fixedly connected with the inner wall of the assembly member through a threaded structure, the inner end is embedded in the limiting groove and a gap is reserved between the inner end and the groove wall, the wear-resistant material prolongs the service life of the limiting member, the threaded fixing ensures stable installation, the gap reduces the movement friction, ensures smooth movement of the first transmission member and accurate limiting at the same time, and improves the reliability and durability of the limiting structure.

[0019] Compared with the prior art, the motor home refrigeration system provided by the present application has the following beneficial effects:

[0020] 1、The present application adopts the design of multi-stage compression air compressor combined with energy recovery device, the pneumatic turbine in the energy recovery device can recover the braking energy of the house car, the heat exchanger can utilize the waste heat of the engine exhaust, both cooperate with the multi-stage compression air compressor, improve the energy utilization efficiency, reduce the consumption of the original energy of the house car, make the system more energy-saving and environment-friendly in the running process, and the temperature sensor in the intelligent temperature control module can sense the temperature in the house car in real time, transmit the information to the MCU controller with built-in PID fuzzy control algorithm, the MCU controller can control the intelligent adjustment of the vortex tube assembly according to the difference between the set temperature and the actual temperature, realize the automatic adjustment of the size of the vortex tube cold air outlet, break through the limitation of traditional manual adjustment, and quickly respond to temperature changes without manual intervention, so as to realize high-precision constant temperature control in the house car.

[0021] 2、The present application drives the rotation of the second transmission member through the driving member, so that the adjusting member can be driven to open and close through the first transmission member and the connecting member, and the intelligent temperature control module can be cooperatively controlled, so that the driving member can adjust the size of the vortex tube outlet according to the instructions of the MCU controller, the system can respond more accurately to the temperature change of each area of the house car, the actual regulation and control effect of the PID fuzzy control algorithm is further improved, and the constant temperature stability is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the system architecture block diagram of the present application.

[0023] Figure 2 It is the structure diagram of the vortex tube of the present application.

[0024] Figure 3 It is the internal structure diagram of the assembly part of the present application.

[0025] Figure 4 It is the structure diagram of the first transmission member of the present application.

[0026] Figure 5 It is the structure assembly diagram of the assembly part and the assembly part of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 1, vortex tube;2, mounting part;3, assembly part;4, first transmission member;5, adjusting part;6, driving part;7, through slot;8, second transmission member;9, connecting part;10, limiting groove;11, limiting part;12, through hole;13, matching part;14, noise reduction part. DETAILED DESCRIPTION

[0029] Clearly, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] Referring to Figure 1 The present application provides a technical solution, a recreational vehicle refrigeration system, comprising a vortex tube 1, a mounting piece 2, an assembly piece 3, a first transmission piece 4, an adjusting piece 5, a driving piece 6, a through slot 7, a second transmission piece 8, a connecting piece 9, a limiting slot 10, a limiting piece 11, a through hole 12, a matching piece 13, a noise reduction piece 14, an air supply system, an intelligent adjusting vortex tube assembly, an intelligent temperature control module, and a noise reduction system:

[0031] The air supply system comprises a multi-stage compression air compressor, an energy recovery device, and a buffer gas storage tank, and the air outlet of the buffer gas storage tank is connected with the intelligent adjusting vortex tube assembly.

[0032] The intelligent adjusting vortex tube assembly comprises a vortex tube 1, referring to Figure 2 The vortex tube 1 is sleeved with the mounting piece 2 at the cold air outlet, the mounting piece 2 is provided with an outer annular sleeve structure, the outer end of the mounting piece 2 is connected with the assembly piece 3, the assembly piece 3 is connected with the outside of the vortex tube 1 through a screw rod, referring to Figure 3 The inner cavity of the assembly piece 3 is inserted with the first transmission piece 4, the assembly piece 3 is a hollow disc structure, and the first transmission piece 4 is a gear ring structure.

[0033] The adjusting piece 5 is installed at the center of the inner wall of the assembly piece 3, the adjusting piece 5 is provided with a water drop-shaped baffle structure, the outside of the assembly piece 3 is installed with the driving piece 6, the output shaft outer end of the driving piece 6 is connected with the second transmission piece 8, the second transmission piece 8 is a gear, and the outside of the adjusting piece 5 is connected with the connecting piece 9, referring to Figure 5 The middle part of the assembly piece 3 is provided with the through hole 12, referring to Figure 3 The top of the assembly piece 3 is provided with the through slot 7 at a position corresponding to the second transmission piece 8, the second transmission piece 8 penetrates through the through slot 7, and the first transmission piece 4 cooperates with the second transmission piece 8, referring to Figure 4The first transmission member 4 is internally circumferentially provided with a limiting groove 10, and the limiting groove 10 is internally provided with a limiting member 11, the limiting member 11 is a bolt structure, the number of the adjusting member 5 is 3-5 groups, the number of the limiting groove 10 and the connecting member 9 is the same as that of the adjusting member 5, the outer end of the connecting member 9 is inserted into the inner wall of the first transmission member 4, the driving member 6 is a stepping motor with self-locking function, the shell of the driving member 6 is fixedly connected with the outer wall of the assembling member 3 through a support, the output shaft of the driving member 6 is provided with a key groove matching structure at the connecting position of the second transmission member 8, and is axially locked through a fastening nut, the limiting member 11 is made of wear-resistant alloy material, the outer end of the limiting member 11 is fixedly connected with the inner wall of the assembling member 3 through a threaded structure, and the inner end of the limiting member 11 is embedded in the limiting groove 10 and has a gap with the groove wall;

[0034] The intelligent temperature control module comprises a temperature sensor, an MCU controller and a man-machine interaction screen, the temperature sensor is arranged in the house car, the MCU controller is integrated in the control end of the house car, the MCU controller is internally provided with a PID fuzzy control algorithm, the energy recovery device comprises a pneumatic turbine connected with the brake system of the house car and a heat exchanger connected with the exhaust pipe of the engine of the house car, an electromagnetic valve is arranged at the gas outlet of the buffer gas tank, a pressure sensor is arranged in the buffer gas tank, a nano-porous heat insulation material layer is arranged on the inner wall of the buffer gas tank, the multi-stage compression air compressor adopts a double-power driving mode, the first compression unit of the multi-stage compression air compressor is selectively connected with the power output end of the engine of the house car through a clutch device, and the secondary compression unit of the multi-stage compression air compressor is electrically connected with the on-board storage battery or the solar power supply system, the pneumatic turbine is connected with the input shaft of the multi-stage compression air compressor through a transmission shaft, the shell of the pneumatic turbine is internally provided with a one-way transmission structure, the heat exchanger adopts a double-pipe structure, the inner pipe of the heat exchanger flows the air to be compressed, and the outer layer of the heat exchanger flows the exhaust gas of the engine;

[0035] The specific implementation process of the pneumatic turbine in the energy recovery device for recovering the brake energy of the house car is as follows in combination with the multi-stage compression air compressor;

[0036] The system starts and initializes: the operator starts the refrigeration system through the man-machine interaction screen, and the intelligent temperature control module starts the self-checking program. The temperature sensor collects the temperature data of each area in the house car in real time, the MCU controller initializes the PID fuzzy control algorithm according to the preset parameters, and checks the pressure sensor signal and the state of the electromagnetic valve in the buffer gas tank. At this time, the multi-stage compression air compressor is in standby mode, the power connection between the first compression unit of the multi-stage compression air compressor and the engine of the house car is in the disconnected state, and the secondary compression unit is pre-started through the on-board storage battery or the solar power supply system;

[0037] Brake energy recovery execution process: when the house car enters the deceleration or downhill working condition, the brake system triggers the energy recovery device. The pneumatic turbine is connected with the input shaft of the multi-stage compression air compressor through the transmission shaft. At this time, the one-way transmission structure in the turbine shell automatically locks the reverse rotation to ensure that the brake energy is only used to drive the air compressor to work. The pneumatic turbine converts the kinetic energy of the vehicle into rotary power to drive the air compressor to compress the air. The compressed air exchanges heat with the engine exhaust gas through the heat exchanger, and the temperature is raised to the required range and then input into the buffer gas storage tank. In this process, the secondary compression unit of the air compressor dynamically adjusts the working frequency according to the feedback signal of the gas tank pressure sensor. When the tank pressure is lower than the set threshold, the secondary unit automatically starts and works with the primary unit;

[0038] Engine exhaust heat energy recovery process: the heat exchanger adopts a double-pipe structure design. The inner pipe flows through the primary compressed air, and the outer layer flows through the high-temperature exhaust gas discharged by the engine. The exhaust gas forms a counter-current heat exchange in the interlayer, transfers heat to the inner air, and raises the temperature of the inner air to above 80℃. A temperature monitoring point is arranged at the outlet of the heat exchanger. When the exhaust gas temperature is detected to be lower than 200℃, the system automatically closes the pneumatic turbine air inlet valve and switches to the secondary compression unit alone to avoid low-efficiency energy conversion;

[0039] Air compression and storage management: the multi-stage compression air compressor adopts a three-stage variable pressure design, and the compression chambers of each stage are connected through communication pipes with one-way valves. The primary compressed air enters the buffer gas storage tank after heat exchange, and the nanometer porous heat insulation material layer laid in the tank effectively reduces heat loss. The pressure sensor monitors the tank pressure in real time. When the set value is reached, the MCU controller sends a command to close the electromagnetic valve to stop air input; when the pressure is lower than the safety value, the system automatically starts the secondary compression unit for air supplement. The conical structure at the bottom of the gas storage tank guides the condensed water to the electronic drain valve, and the drainage period is dynamically adjusted by the controller according to the humidity sensor signal;

[0040] Temperature control and adjustment mechanism: the intelligent adjustment vortex tube assembly is started according to the MCU controller command, the driving part drives the second driving part to rotate, and the first driving part is driven to rotate through gear engagement. The limiting groove on the inner wall of the first driving part cooperates with the limiting part to ensure the stability of the transmission. The adjusting part adjusts the opening angle under the action of the driving part to change the air volume distribution of the cold air outlet. The PID fuzzy control algorithm takes temperature deviation and deviation change rate as input to dynamically adjust the opening degree of the electromagnetic valve and the rotating speed of the driving part. When the temperature deviation is greater than 3℃, it enters the forced cooling mode, and when the deviation is within ±1℃, it switches to the fine adjustment mode to ensure that the temperature fluctuation in the house car is not more than 0.5℃;

[0041] The operation process of the noise reduction system is as follows: after the compressed air is output from the buffer tank, it enters the vortex tube through the spiral guide pipe. The axial ribs on the inner wall of the guide pipe break the vortex of the airflow and reduce the turbulent noise. The noise reduction piece absorbs noise of different frequencies through the honeycomb structure and the staggered wave-shaped guide plates, and the double-layer sound insulation structure of the matching piece further isolates the vibration transmission. The entire noise reduction system forms a double-stage noise reduction structure at the air inlet and outlet of the assembly piece.

[0042] Emergency mode and system protection: when the vehicle battery is insufficient or the solar power supply system fails, the multi-stage compression air compressor automatically switches to the engine power driving mode, at which time the clutch device re-establishes the power connection between the first compression unit and the engine. If the pressure in the buffer tank abnormally rises, the safety valve will automatically open to release pressure, and the MCU controller will issue an alarm through the human-machine interaction screen to prompt the operator to check the system status.

[0043] System shutdown and data storage: after the operator turns off the refrigeration system through the human-machine interaction screen, the MCU controller executes the shutdown program, saves the temperature curve, pressure change and other data of this run to the storage module. At this time, the drive piece returns to zero, the adjustment piece restores the initial angle, the electromagnetic valve is closed, the transmission connection between the pneumatic turbine and the air compressor is disconnected, and the entire system enters a low-power standby state.

[0044] Please refer to Figure 1 , the noise reduction system includes a noise reduction piece 14 and a spiral guide pipe, please refer to Figure 5 , the noise reduction piece 14 is installed outside the assembly piece 3, the spiral guide pipe is installed between the buffer tank and the vortex tube 1, the noise reduction piece 14 has a honeycomb structure, the noise reduction piece 14 is sleeved with a matching piece 13 outside, the center of the noise reduction piece 14 coincides with the center of the through hole 12, the outside of the matching piece 13 is connected with the corresponding position of the outside of the assembly piece 3, the honeycomb structure of the noise reduction piece 14 is provided with staggered guide plates, the surface of the guide plate is wave-shaped, the matching piece 13 adopts a double-layer sound insulation structure, the inner layer of the matching piece 13 is a metal sheet, and the outer layer of the matching piece 13 is a flexible sound insulation material.

[0045] The scheme adopts the design of combination of multi-stage compression air compressor and energy recovery device, the pneumatic turbine in the energy recovery device can recover the braking energy of the motor home, the heat exchanger can utilize the waste heat of the engine exhaust, and the multi-stage compression air compressor is matched with the two to improve the energy utilization efficiency, reduce the consumption of the original energy of the motor home, make the system more energy-saving and environment-friendly in the running process, and the temperature sensor in the intelligent temperature control module can sense the temperature in the motor home in real time, transmit information to the MCU controller with the built-in PID fuzzy control algorithm, the MCU controller can control the intelligent adjustment of the vortex tube assembly according to the difference between the set temperature and the actual temperature, realize the automatic adjustment of the size of the cold air outlet of the vortex tube 1, break through the limitation of traditional manual adjustment, and quickly respond to temperature changes without manual intervention, so that high-precision constant temperature control in the motor home is realized, and the specific implementation process is as follows:

[0046] Temperature data acquisition stage: the multiple point temperature sensors preset in the motor home are started synchronously, and the temperatures of the driving area, the resting area and the storage area are monitored. The sensor adopts three-wire PT100 platinum resistance, and the contact type temperature measurement method is used to sense the environment temperature in real time. Data is collected every 2 seconds and converted into an electrical signal, which is transmitted to the MCU controller through a shielded cable;

[0047] Control algorithm operation stage: after the MCU controller receives the temperature signal, the built-in PID fuzzy control algorithm is started immediately. The algorithm first calculates the deviation range of the temperature of each area from the set value, and predicts the future temperature trend combined with the historical temperature change trend. When it is detected that the temperature deviation of a certain area exceeds 1.5 DEG C, the system automatically determines that the working condition needs to be adjusted, and the control level is divided according to the deviation size: the deviation is more than 3 DEG C, the forced cooling mode is entered, the deviation is between 1 DEG C and 3 DEG C, the normal adjustment mode is entered, and the deviation is less than 1 DEG C, the fine adjustment and maintenance mode is started;

[0048] Drive instruction generation stage: according to the adjustment amount output by the control algorithm, the MCU controller generates corresponding pulse width modulation signals. The signals are transmitted to the drive part 6 (step motor with self-locking function) through the CAN bus, and the instruction content includes the rotation direction, the step angle and the holding torque parameters. For example, when the cold air volume needs to be increased, the controller sends a positive rotation instruction, and the drive part 6 rotates at a speed of 60 steps per second;

[0049] Mechanical transmission execution stage: after receiving the instruction, the output shaft of the drive part 6 drives the second transmission part 8 (gear) to rotate through the key groove matching structure. The second transmission part 8 is meshed with the first transmission part 4 (tooth ring structure) to force the first transmission part to move in the circumferential direction in the hollow disc of the assembly part 3. The limiting groove 10 on the inner wall of the first transmission part is in sliding cooperation with the limiting part 11 (wear-resistant alloy bolt), so that the transmission process is free of radial deviation;

[0050] Cold air outlet adjustment stage: the rotary motion of the first transmission member 4 is transmitted to the adjustment member 5 (water droplet-shaped baffle) through the connecting member 9 (transmission rod with elastic clamping jaw). The adjustment member makes opening and closing motion with the center of the assembly 3 as the axis, and the arc surface design of the water droplet-shaped structure can smoothly change 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, so as to realize stepless adjustment of the air volume;

[0051] State feedback verification stage: during the adjustment process, the encoder built-in the driving member 6 feedbacks the rotation angle in real time, and compares with the instruction value of the MCU controller. If the actual angle deviates from the target value by more than 2%, the system automatically starts the compensation program, and adjusts the position of the driving member through fine-tuning pulse signal. At the same time, the pressure sensor in the buffer gas tank synchronously monitors the gas supply pressure. When the pressure is lower than the safety threshold, the controller prioritizes basic refrigeration needs and suspends the fine adjustment mode;

[0052] Multi-region collaborative control stage: for multi-region car space with temperature difference, the MCU controller adopts partition control strategy. For example, when the temperature of the driving area meets the standard and the temperature of the resting area still needs to be lowered, the system adjusts the opening degree of the adjustment member in the corresponding area to realize directional delivery of cold air. The adjustment members in each area act independently, but are coordinated by algorithm to avoid system pressure fluctuation caused by excessive adjustment of the cold air outlet;

[0053] Abnormal state processing stage: if the temperature sensor detects abnormally high temperature (such as more than 40℃) or the driving member appears locked-rotor fault, the MCU controller immediately executes the emergency program: closes the electromagnetic valve to stop gas supply, starts the standby cooling fan, and displays the fault code through the man-machine interaction screen. At this time, the adjustment member automatically resets to the maximum opening position to ensure the continuous operation of the basic refrigeration function;

[0054] Running record and learning stage: after each operation of the system, the MCU controller stores the temperature adjustment curve, driving member action frequency and other data into the non-volatile memory. Through long-term data accumulation, the control algorithm can automatically optimize the PID parameters, such as adjusting the temperature response speed according to the user's usage habits, so that the system gradually adapts to the use scene of a specific car;

[0055] System hibernation and wake-up stage: when the car power switches to low-power mode, the intelligent temperature control module enters standby state. At this time, the driving member 6 remains in the self-locking state to prevent the adjustment member from moving accidentally, and the temperature sensor reduces the frequency to collect data every 30 seconds. When the detected temperature rises by more than 2℃, the system automatically wakes up and executes a single adjustment cycle to maintain the basic temperature balance of the car interior.

[0056] The scheme drives the rotation of the second transmission member 8 through the driving member 6, so that the adjusting member 5 can be opened and closed through the driving of the first transmission member 4 and the connecting member 9, and then the intelligent temperature control module can be cooperatively controlled, so that the driving member 6 can adjust the size of the vortex tube 1 outlet according to the instructions of the MCU controller in real time, the system can respond more accurately to the temperature change of each area of the motor home, and the actual regulation effect of the PID fuzzy control algorithm can be further improved, and the constant temperature stability can be enhanced.

[0057] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0058] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A recreational vehicle refrigeration system, characterized by, The utility model relates to air supply system, intelligent regulation vortex tube subassembly, intelligent temperature control module and noise reduction system, air supply system includes multistage compression air compressor, energy recovery device and buffer gas storage tank, and the air outlet of buffer gas storage tank is connected with intelligent regulation vortex tube subassembly; Intelligent regulation vortex tube subassembly, including vortex tube (1), the cold wind air outlet of vortex tube (1) is equipped with mounting piece (2), the outer end of mounting piece (2) is connected with assembly part (3), and the inner chamber of assembly part (3) is inserted with first transmission part (4); Adjusting part (5) is installed at the inner wall center of assembly part (3), the outside of adjusting part (5) is clamped with connecting piece (9), and the middle part of assembly part (3) is provided with through-hole (12); The rotating movement of first transmission part (4) is transmitted to adjusting part (5) through connecting piece (9), adjusting part (5) makes opening and closing movement with assembly part (3) center as the pivot, and the arc surface design of water drop shape structure can smoothly change the effective ventilation area of cold wind air outlet, when adjusting part (5) expands to the outside, the cold wind outlet cross-sectional area increases, and vice versa, so as to realize stepless regulation of air volume; Intelligent temperature control module, including temperature sensor, MCU controller and man-machine interaction screen, the temperature sensor is installed in the house car, the MCU controller is integrated in the control end of house car, the inside of MCU controller is provided with PID fuzzy control algorithm, and the energy recovery device includes pneumatic turbine linked with house car brake system and heat exchanger connected with house car engine exhaust pipe; Noise reduction system, including noise reduction part (14) and spiral guide pipe, the noise reduction part (14) is installed outside assembly part (3), and the spiral guide pipe is installed between buffer gas storage tank and vortex tube (1). The top of assembly part (3) is provided with through groove (7) at the position corresponding to second transmission part (8), and second transmission part (8) penetrates through groove (7).

2. The RV refrigeration system of claim 1, wherein: The inside of first transmission part (4) is provided with limiting groove (10) circumferentially, limiting groove (10) is inserted with limiting part (11) inside, the number of adjusting part (5) is 3-5 groups, the number of limiting groove (10) and connecting piece (9) is same with adjusting part (5), and the outer end of connecting piece (9) is inserted into the inner wall of first transmission part (4).

3. The RV refrigeration system of claim 1, wherein: The noise reduction part (14) is honeycomb structure, the outside of noise reduction part (14) is equipped with matching part (13), the center of noise reduction part (14) coincides with the center of through-hole (12), and the outside of matching part (13) is connected with the corresponding position of assembly part (3).

4. The RV refrigeration system of claim 1, wherein: The air outlet of buffer gas storage tank is provided with electromagnetic valve, the inside of buffer gas storage tank is provided with pressure sensor, and the inner wall of buffer gas storage tank is provided with nanometer porous heat insulation material layer.

5. The RV refrigeration system of claim 1, wherein: ​ 6. The RV refrigeration system of claim 1, wherein: The multistage compression air compressor adopts a double-power driving mode, a first stage compression unit of the multistage compression air compressor is selectively connected with a power output end of a motor home engine through a clutch device, and a secondary compression unit of the multistage compression air compressor is electrically connected with a vehicle-mounted storage battery or a solar power supply system.

7. The RV refrigeration system of claim 1, wherein: The aerodynamic turbine is connected with an input shaft of the multistage compression air compressor through a transmission shaft, a one-way transmission structure is arranged in the shell of the aerodynamic turbine, the heat exchanger adopts a double-pipe structure, an inner pipe of the heat exchanger is used for flowing the air to be compressed, and an outer interlayer of the heat exchanger is used for flowing the engine exhaust gas.

8. The RV refrigeration system of claim 1, wherein: The driving member (6) is a stepping motor with a self-locking function, the shell of the driving member (6) is fixedly connected with the outer wall of the assembling member (3) through a support, a key groove matching structure is arranged at the connecting part of the output shaft of the driving member (6) and the second transmission member (8), and the output shaft is axially locked through a fastening nut.

9. The RV refrigeration system of claim 4, wherein: The honeycomb structure of the noise reduction member (14) is internally provided with staggered distribution of guide plates, the surface of the guide plates is in a wave shape, the matching member (13) adopts a double-layer sound insulation structure, the inner layer of the matching member (13) is a metal sheet, and the outer layer of the matching member (13) is a flexible sound insulation material.

10. The RV refrigeration system of claim 3, wherein: The limiting member (11) is made of wear-resistant alloy material, the outer end of the limiting member (11) is fixedly arranged on the inner wall of the assembling member (3) through a threaded structure, and the inner end of the limiting member (11) is embedded in the limiting groove (10) and a gap is reserved between the inner end and the groove wall.

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