Automobile air conditioning system simulator

Abstract

The utility model relates to the technical field of automobile engineering, and discloses an automobile air conditioning system simulator which mainly comprises a pressure detection device, a refrigerant processing device, a filtering device, a switch valve and an oil bottle assembly. The pressure detection device dynamically monitors the pressure of the system, and the refrigerant processing device simulates the real working condition according to the refrigeration cycle principle, so that the refrigerant processed by the filling and recycling machine is subjected to a complete cycle process. The filter device maintains the purity of the refrigerant, and ensures that the test environment is close to reality. The switch valve controls refrigerant flow and flow direction, the oil bottle guarantees stable operation of the compressor, and the two cooperate to provide a stable basis for performance testing. According to the utility model, performance indexes such as recovery efficiency, filling precision and the like of the refrigerant filling and recovering machine can be comprehensively tested, the test cost of the refrigerant filling and recovering machine is reduced, and manpower, material resources and time costs are reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive engineering technology, and in particular to an automotive air conditioning system simulator. Background Technology

[0002] During the production of refrigerant recovery and charging machines, performance testing is required on the completed machines. Since they cannot be connected to actual automotive air conditioning systems, the machine is connected to an empty gas cylinder to perform refrigerant cleaning, recovery, charging, and refueling tests. However, automotive air conditioning systems are complex, and empty gas cylinders differ significantly from actual automotive air conditioning systems in terms of pressure changes, refrigerant flow resistance, and heat exchange environment. This makes it impossible to accurately test the refrigerant recovery efficiency, charging accuracy, and other performance indicators of the machine. Utility Model Content

[0003] The purpose of this invention is to provide an automotive air conditioning system simulator, which can simulate an automotive air conditioning system and accurately test the performance indicators of the refrigerant charging and recovery machine, such as the recovery efficiency and charging accuracy.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] An automotive air conditioning system simulator includes a frame, a refrigeration cycle mechanism disposed within the frame, and a pressure detection device disposed within the frame. The refrigeration cycle mechanism includes a condenser for converting gaseous refrigerant into liquid and an evaporator for evaporating liquid refrigerant to absorb heat and cool it. The pressure detection device includes a high-pressure gauge and a low-pressure gauge disposed on the frame. A low-pressure connector, a high-pressure connector, and a switch valve are disposed on the top of the frame. The high-pressure connector is connected to a high-pressure pipeline, and the low-pressure connector is connected to a low-pressure pipeline. A compressor for providing power for refrigerant circulation, a dryer filter for filtering impurities and moisture, and an expansion valve for throttling and reducing the pressure of high-pressure liquid refrigerant are disposed within the frame. The compressor, condenser, dryer filter, expansion valve, and evaporator are sequentially connected by copper pipes.

[0006] By adopting the above technical solution, the equipment of this utility model simulates a real car air conditioning system. The refrigerant recovery and charging machine can be connected to a similar real car air conditioning system during the production process, so as to test whether the performance indicators such as the recovery efficiency and charging accuracy of the refrigerant recovery and charging machine are qualified and whether rework is required. This avoids the discovery of equipment damage during actual use, which would affect production efficiency. The equipment of this utility model can improve production efficiency, simplify testing steps, and save human resources.

[0007] Each of the devices serves the following functions:

[0008] 1. The frame is the basic structure of the entire simulation system. The frame bears the weight of each component in the system and also provides a certain degree of protection for the internal components, preventing them from being affected by external collisions.

[0009] 2. The refrigerant treatment device compresses and liquefies the refrigerant for storage. After the liquefied refrigerant passes through a filter to reduce its pressure, it then evaporates to participate in refrigeration, achieving a cooling effect. After that, it is compressed and liquefied again to enter the next cycle.

[0010] In this cycle, the compressor powers the refrigerant circulation, compressing the low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. The compressor then delivers this high-temperature, high-pressure gaseous refrigerant through copper pipes to the condenser, where it cools the gaseous refrigerant into a liquid state. The condensed liquid refrigerant then passes through a dryer filter, which continuously filters the liquid refrigerant, removing impurities, moisture, oil, and other contaminants. The high-pressure liquid refrigerant, after drying and filtering, reaches the expansion valve and is delivered there. The expansion valve throttles and reduces the pressure of the high-pressure liquid refrigerant, transforming it into a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant then enters the evaporator, fixed to the inner wall of the frame. Inside the evaporator, the liquid refrigerant absorbs heat from its surroundings and evaporates into a gaseous state, achieving a heat absorption and cooling effect. Simultaneously, the air around the evaporator is cooled, and the cold air is blown out through the air outlet at the top of the frame, simulating the cooling airflow process of a car's air conditioning system. Finally, the evaporated gaseous refrigerant returns to the compressor through a low-pressure connector, entering the next cycle.

[0011] 3. The pressure detection device monitors the pressure changes in the refrigeration cycle system in real time. By detecting these pressure values, it can determine whether the amount of refrigerant in the system is sufficient, whether the compressor is working properly, and whether there are any blockages in the pipeline. The high-pressure connector monitors the high pressure from the compressor discharge end to the expansion valve, and the low-pressure connector monitors the low pressure from the evaporator outlet to the compressor suction end. The pressure detection device transmits the detected pressure signal to the control system, which then takes corresponding measures to increase or decrease the pressure to ensure that the system operates within a safe pressure range.

[0012] By opening, closing, or adjusting the valve opening, the flow rate of refrigerant in the refrigeration cycle system can be precisely controlled.

[0013] Switch valves can be used in conjunction with pressure detection devices to regulate system pressure. When the system pressure is too high, some bypass valves or relief valves can be opened appropriately to allow some refrigerant to flow to the low-pressure side, thereby reducing the system pressure. When the system pressure is too low, some unnecessary branch valves can be closed to reduce the refrigerant flow path, increase the system pressure, and ensure that the system operates within the normal pressure range.

[0014] A further feature of this invention is that an oil bottle for storing refrigeration oil is provided within the frame.

[0015] By adopting the above technical solution, the oil bottle is used to store an appropriate amount of refrigeration oil, and during system operation, it provides a continuous and stable supply of refrigeration oil to the compressor according to the compressor's working requirements, ensuring that the mechanical parts inside the compressor can operate under good lubrication conditions, reducing wear, and improving the compressor's efficiency and service life.

[0016] During the refrigeration cycle, some refrigeration oil circulates in the system along with the refrigerant. When the refrigerant passes through components such as the evaporator and condenser, the refrigeration oil separates from the refrigerant due to changes in pressure and temperature. The separated refrigeration oil can be collected in an oil bottle to prevent it from accumulating in the system and affecting the refrigeration effect. At the same time, it enables the recycling and reuse of refrigeration oil, ensuring that the total amount of refrigeration oil in the system remains relatively stable.

[0017] The oil bottle can buffer the fluctuations in oil pressure in the system to a certain extent. When the compressor load changes or the system pressure fluctuates, the oil bottle can store or release a certain amount of refrigeration oil to maintain the relative stability of the oil pressure, ensuring that the compressor can work in a stable oil pressure environment and reducing the damage to the compressor caused by unstable oil pressure.

[0018] The present invention is further configured as follows: an upper support and a lower support are arranged horizontally in sequence within the frame, a side wall support is provided on the rear side wall of the frame, the condenser is set on the upper support, the evaporator is set vertically on the rear side wall of the frame and fixedly connected to the upper inner wall of the frame, the compressor is set on the lower support, the oil bottle is set on the side wall support, and the oil bottle and the compressor are connected by copper pipes.

[0019] By adopting the above technical solution, the upper support, lower support and side wall support inside the frame further fix the various components in the system in the positions determined by the frame, which can accurately position these components, ensure the connection accuracy between them, ensure that the refrigerant pipe connection is accurate, and avoid system failures caused by component installation position deviations.

[0020] The present invention is further configured such that: a first observation plate made of transparent material is provided at the top of the frame, a second observation plate made of transparent material is provided on the side wall of the frame, and a bottom plate is provided at the bottom of the frame.

[0021] By adopting the above technical solution, the first observation plate and the second observation plate are covered outside the frame and are both made of transparent material, which makes it convenient to observe the operating status of the internal components of the system during the operation of the equipment.

[0022] A further feature of this invention is that air outlets are evenly distributed on the first observation plate.

[0023] By adopting the above technical solution, the air outlet simulates the air outlet of a car air conditioning system. The cooled air around the evaporator is blown out from the air outlet. The cold air blown out from the air outlet of the car air conditioning system can achieve the effect of lowering the temperature. The air outlet of this car air conditioning system simulator simulates the cooling air outlet process of a car air conditioning system. The cooling effect is judged by testing the air outlet temperature of this utility model.

[0024] A further feature of this invention is that a number of heat dissipation holes are provided in the middle of the second observation plate.

[0025] By adopting the above technical solution, when the refrigerant in the system is cooled and liquefied in the condenser, it needs to dissipate the heat through the heat dissipation port so that the refrigerant can circulate smoothly in the system and ensure the normal operation of the system. The heat generated in this process is dissipated to the outside of the system, preventing the system from malfunctioning due to overheating and performance degradation. This ensures the normal operation of the car air conditioning system simulator and also helps to maintain the internal pressure balance of this utility model.

[0026] A further feature of this invention is that: each of the four corners of the base plate is provided with a movable block, the bottom of the movable block is provided with a movable wheel, and the top of the movable block is rotatably connected to the base plate.

[0027] By adopting the above technical solution, the setting of the moving wheels and moving blocks makes the movement of this automotive air conditioning system simulator more convenient, and facilitates the movement of this utility model to inspect multiple refrigerant charging and recovery machines in sequence.

[0028] The beneficial effects of this utility model are:

[0029] 1. This utility model equipment simulates a real car air conditioning system. During the production process, the refrigerant recovery and charging machine can be connected to a similar real car air conditioning system to test whether the performance indicators such as the recovery efficiency and charging accuracy of the refrigerant recovery and charging machine are qualified and whether rework is required. This avoids the discovery of equipment damage during actual use, which would affect production efficiency. This utility model equipment can improve production efficiency and simplify the testing steps.

[0030] 2. To avoid the dangers of direct contact with real automotive air conditioning systems, such as high-pressure refrigerant leaks and electrical short circuits, practice refrigerant recovery and charging, troubleshooting, and other operations repeatedly in a safe environment. This makes troubleshooting more convenient and improves safety.

[0031] 3. Reduce the testing costs of refrigerant recovery and charging machines, significantly reducing manpower, material resources, and time costs. Multiple rounds of optimization testing of the air conditioning system can be conducted without frequently utilizing vehicle resources. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0034] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0035] Figure 3 This is a front view of the internal structure of this utility model;

[0036] In the diagram, 1. Condensing circulation mechanism; 11. Refrigerant handling device; 111. Compressor; 112. Condenser; 113. Evaporator; 114. Expansion valve; 12. Dryer filter; 2. Switch valve; 3. Oil bottle; 4. Frame; 41. Upper support; 42. Lower support; 43. Side wall support; 51. Moving block; 52. Casters; 6. Pressure detection device; 61. High-pressure connector; 62. Low-pressure connector; 63. High-pressure gauge; 64. Low-pressure gauge; 71. First observation plate; 711. Air outlet; 72. Second observation plate; 721. Heat dissipation hole; 8. Connecting plate; 9. Base plate. Detailed Implementation

[0037] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0038] The specific structure of this utility model:

[0039] A car air conditioning system simulator includes a frame 4, a refrigeration cycle mechanism 1 disposed within the frame 4, and a pressure detection device 6 disposed within the frame 4. The refrigeration cycle mechanism 1 includes a condenser 112 for converting gaseous refrigerant into liquid and an evaporator 113 for evaporating liquid refrigerant to absorb heat and cool. The pressure detection device 6 includes a high-pressure gauge 63 and a low-pressure gauge 64 disposed on the frame 4. A low-pressure connector 62, a high-pressure connector 63, and a switch valve 2 are disposed on the top of the frame 4. The high-pressure connector 61 is connected to a high-pressure pipeline, and the low-pressure connector 62 is connected to a low-pressure pipeline. A compressor 111 for providing power for refrigerant circulation, a dryer filter 12 for filtering impurities and moisture, and an expansion valve 114 for throttling and reducing the pressure of high-pressure liquid refrigerant are disposed within the frame 4. The compressor 111, condenser 112, dryer filter 12, expansion valve 114, and evaporator 113 are connected sequentially by copper pipes.

[0040] Furthermore, an upper support 41 and a lower support 42 are arranged horizontally in sequence inside the frame 4. A side wall support 43 is provided on the rear side wall of the frame 4. The condenser 112 is set on the upper support 41. The evaporator 113 is vertically set on the rear side wall of the frame 4 and fixedly connected to the upper inner wall of the frame 4. The compressor 111 is set on the lower support 42. The oil bottle 3 is set on the side wall support 43. The oil bottle 3 and the compressor 111 are connected by copper pipes.

[0041] Furthermore, the top of the frame 4 is provided with a first observation plate 71 made of transparent material, and the bottom of the frame 4 is provided with a base plate 9. Air outlets 711 are evenly opened on the first observation plate 71.

[0042] Furthermore, a second observation plate 72 made of transparent material is provided on the side wall of the frame 4, and several heat dissipation holes 721 are opened in the middle of the second observation plate 72.

[0043] Furthermore, each of the four corners of the base plate 9 is provided with a movable block 51, and the bottom of the movable block 51 is rotatably provided with a movable wheel 52, and the top of the movable block 51 is rotatably connected to the base plate 9.

[0044] The working process of this utility model:

[0045] 1. Connection and Preparation Phase: Using the red and blue quick-connect fittings for high and low pressure on the refrigerant recovery and charging machine, tightly connect the low-pressure connector 62 and the high-pressure connector 61 of the simulator to ensure a smooth and leak-free flow path for the refrigerant, laying the foundation for subsequent testing operations. After connection, start the refrigerant recovery and charging machine to prepare for the testing process.

[0046] 2. Refrigerant Recovery Stage: The refrigerant recovery and charging machine's recovery function is activated, and refrigerant begins to be drawn from the simulator and recovered into the designated container. During this process, the high-pressure connector 61 and low-pressure connector 62 of the pressure detection device monitor the pressure on the high-pressure and low-pressure sides of the system, respectively, while the high-pressure gauge 63 and low-pressure gauge 64 display the pressure values ​​in real time. This pressure data can be used to determine whether the recovery process is smooth, whether the amount of refrigerant recovered is as expected, and whether the system is working properly. Abnormal pressure may indicate a blockage or other malfunction in the system.

[0047] 3. Vacuuming Stage: After refrigerant recovery is complete, the vacuuming function of the refrigerant recovery and charging machine is activated to perform a vacuuming operation inside the air conditioning system simulator. The purpose of vacuuming is to remove air and moisture from the system, ensuring a good vacuum state within the system to prepare for subsequent refrigerant charging. At this time, the refrigerant in the system is almost completely extracted, and the internal pressure continuously decreases.

[0048] 4. Refrigerant Oil Filling Stage: Add an appropriate amount of refrigerant oil to the air conditioning system simulator according to actual needs. Oil bottle 3, acting as a lubrication device, provides the refrigerant oil source during this stage. Oil bottle 3 is fixed above the lower support 42. During the filling process, the refrigerant oil stored in it flows through specific pipelines to components requiring lubrication, such as the compressor, ensuring these components maintain good lubrication during subsequent operation, reducing wear, and improving efficiency and service life.

[0049] 5. Refrigerant Charging Stage: According to the set refrigerant charging amount, the refrigerant recovery and charging machine begins to charge refrigerant into the air conditioning system simulator. During the charging process, the refrigerant enters the simulator from the recovery and charging machine through the high-pressure connector. At this time, the refrigerant is under high pressure.

[0050] During this process, the compressor 111, located above the lower support 42, starts to work, providing power for the refrigerant circulation. It compresses the incoming low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant. This process causes the pressure and temperature of the refrigerant to rise sharply, preparing for subsequent heat dissipation and liquefaction in the condenser 112.

[0051] Next, the high-temperature, high-pressure gaseous refrigerant is transported to the condenser 112 above the upper support 41. The condenser 112 cools the gaseous refrigerant into a liquid state through heat dissipation, realizing the state change of the refrigerant from gaseous to liquid. In this process, the refrigerant releases a large amount of heat, which is dissipated into the surrounding environment through the heat dissipation structure of the condenser 112.

[0052] Then, the liquid refrigerant passes through the dryer filter 12 fixed on the side wall bracket 43 by copper pipe. After being liquefied by the condenser 112, the liquid refrigerant passes through the dryer filter 12 before flowing to the expansion valve 114. The dryer filter 12 continuously filters the liquid refrigerant to remove impurities, moisture and oil and other contaminants, ensuring that the refrigerant entering the subsequent components is pure and preventing these contaminants from damaging the precision components in the system such as the expansion valve 114 and the compressor 111.

[0053] The high-pressure liquid refrigerant, after being dried and filtered, then enters the expansion valve 114. The expansion valve 114 is located on the connecting plate 8 connecting the two parts of the evaporator 113. The expansion valve 114 throttles and reduces the pressure of the high-pressure liquid refrigerant, turning it into a low-temperature, low-pressure liquid refrigerant, thus creating conditions for evaporative cooling in the evaporator 113.

[0054] Finally, the low-temperature, low-pressure liquid refrigerant enters the evaporator 113, which is fixed to the inner wall of the frame. Inside the evaporator 113, the liquid refrigerant absorbs heat from the surroundings and evaporates into a gaseous state, achieving the effect of heat absorption and cooling. At this time, the air around the evaporator 113 is cooled, and the cold air is blown out through the air outlet 711 at the top of the frame, simulating the cooling airflow process of a car air conditioner. The evaporated gaseous refrigerant then returns to the compressor 111 through the low-pressure connector 62, entering the next cycle.

[0055] 6. Performance Testing Phase: After completing the above operations, power on the air conditioning system simulator to simulate the actual operation of a car air conditioning system. After running for a period of time, use a temperature measuring device to detect the temperature of the simulator's air outlet 711. Compare the measured temperature value with the preset normal temperature range. If the temperature of air outlet 711 is within the preset range, it indicates that the refrigerant recovery and charging machine is operating normally in all operations and can meet actual usage requirements; if the temperature of air outlet 711 does not meet the requirements, it indicates that the refrigerant recovery and charging machine may have a malfunction or be operating improperly, requiring further inspection and adjustment.

[0056] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0057] This utility model has been described through several embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. A car air conditioning system simulator, characterized in that: The system includes a frame (4), a refrigeration cycle mechanism (1) disposed within the frame (4), and a pressure detection device (6) disposed within the frame (4). The refrigeration cycle mechanism (1) includes a condenser (112) for converting gaseous refrigerant into liquid and an evaporator (113) for evaporating liquid refrigerant to absorb heat and cool. The pressure detection device (6) includes a high-pressure gauge (63) and a low-pressure gauge (64) disposed on the frame (4). The top of the frame (4) is provided with a low-pressure connector (62), a high-pressure connector (63), and a switch valve (2). The high-pressure connector (61) is connected to a high-pressure pipeline, and the low-pressure connector (62) is connected to a low-pressure pipeline. The frame (4) is provided with a compressor (111) for providing power for refrigerant circulation, a dryer filter (12) for filtering impurities and moisture, and an expansion valve (114) for throttling and reducing the pressure of high-pressure liquid refrigerant.

2. The automotive air conditioning system simulator according to claim 1, characterized in that: The frame (4) contains an oil bottle (3) for storing refrigeration oil.

3. The automotive air conditioning system simulator according to claim 2, characterized in that: The frame (4) is provided with an upper support (41) and a lower support (42) arranged horizontally in sequence. The rear side wall of the frame (4) is provided with a side wall support (43). The condenser (112) is arranged on the upper support (41). The evaporator (113) is arranged vertically on the rear side wall of the frame (4) and is fixedly connected to the upper inner wall of the frame (4). The compressor (111) is arranged on the lower support (42). The oil bottle (3) is arranged on the side wall support (43).

4. The automotive air conditioning system simulator according to claim 1, characterized in that: The frame (4) has a first observation plate (71) made of transparent material at the top and a base plate (9) at the bottom.

5. A car air conditioning system simulator according to claim 4, characterized in that: Air outlets (711) are evenly distributed on the first observation plate (71).

6. A car air conditioning system simulator according to claim 4, characterized in that: A second observation plate (72) made of transparent material is provided on the side wall of the frame (4).

7. A car air conditioning system simulator according to claim 6, characterized in that: The second observation plate (72) has several heat dissipation holes (721) in the middle.

8. A car air conditioning system simulator according to claim 4, characterized in that: Each of the four corners of the base plate (9) is provided with a movable block (51), and the bottom of the movable block (51) is provided with a movable wheel (52).

9. A car air conditioning system simulator according to claim 8, characterized in that: The top of the movable block (51) is rotatably connected to the base plate (9).

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