Automobile cooling liquid vacuum filling system and method

Abstract

The invention relates to an automobile cooling liquid vacuum filling system and method. The system comprises a vacuum pump; the drying filter is connected with the vacuum pump; a liquid storage tank; the valves are used for controlling fluid flow and comprise a first three-way valve, a first electromagnetic valve and a second electromagnetic valve; the digital display pressure sensor is used for monitoring system pressure in real time; the cooling liquid filter is used for filtering impurities in the cooling liquid; the first water pump is used for driving the cooling liquid to circulate; the first mode selection valve and the second mode selection valve are respectively connected with the plurality of valves and are used for switching among a vacuumizing mode, a leakage checking mode, a filling mode, a filtering and cleaning mode and a cooling liquid recycling mode; and the controller is used for controlling the operation of the automobile cooling liquid vacuum filling system. The cooling liquid filling efficiency can be remarkably improved, the filling quality is guaranteed, cooling liquid consumption is reduced, and meanwhile the multiple functions of leakage detection, filtering and cleaning, cooling liquid recycling and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the field of automobile cooling system maintenance, and in particular to an automobile coolant vacuum filling system and method. Background Art

[0002] The cooling systems of new energy vehicles are more complex than those of traditional fuel-powered vehicles, with long, complex pipes and numerous valves. During vehicle repairs or maintenance, large amounts of coolant often need to be drained and replaced. Currently, the most common method for refilling coolant is to add fluid and vent air, but this method has drawbacks such as being time-consuming and prone to inadequate refilling.

[0003] There are some problems with the existing coolant filling method: first, the exhaust and refilling process takes a long time, affecting maintenance efficiency; second, it is easy to have incomplete exhaust or insufficient refilling, resulting in poor local cooling effect of the cooling system; third, each replacement or refill of coolant requires a large amount of new liquid, increasing the cost of use.

[0004] Therefore, there is an urgent need for a filling system and method that can improve filling efficiency, ensure filling quality, and reduce coolant consumption. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a vehicle coolant vacuum filling system and method, which can significantly improve the coolant filling efficiency, ensure the filling quality, reduce coolant consumption, and simultaneously realize multiple functions such as leak detection, filtration and cleaning, and coolant recovery.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions.

[0007] In a first aspect, the present invention provides an automobile coolant vacuum filling system, which adopts the following technical solutions: Vacuum pump, used to generate the vacuum pressure required by the system; A drying filter connected to the vacuum pump, used to remove moisture and impurities during the vacuuming process; A reservoir tank for storing and supplying coolant; a plurality of valves for controlling fluid flow, the plurality of valves comprising a first three-way valve, a first solenoid valve, and a second solenoid valve, wherein the first three-way valve is connected to the vacuum pump and the drying filter, and the first solenoid valve and the second solenoid valve are used to control the flow direction of the coolant; a digital pressure sensor connected to the plurality of valves for real-time monitoring of system pressure; a coolant filter connected to the plurality of valves and configured to filter impurities in the coolant; a first water pump connected to the coolant filter and the plurality of valves, for driving coolant circulation; a first mode selection valve and a second mode selection valve, respectively connected to the plurality of valves, for switching between vacuuming, leak checking, filling, filtering and cleaning, and coolant recovery modes; and A controller is electrically connected to the plurality of valves, the digital pressure sensor, the first water pump, the first mode selection valve, and the second mode selection valve, and is used to control the operation of the automotive coolant vacuum filling system.

[0008] Furthermore, the above-mentioned automobile coolant vacuum filling system also includes a flow meter, which is electrically connected to the controller and is used to measure the flow rate of the coolant.

[0009] Furthermore, the above-mentioned automobile coolant vacuum filling system also includes a flow control valve and a pressure air source for adjusting the flow of the coolant during the filling process.

[0010] Furthermore, the above-mentioned automobile coolant vacuum filling system also includes an observation mirror, which is arranged on the liquid storage tank and is used to observe the coolant level.

[0011] Furthermore, the above-mentioned automobile coolant vacuum filling system also includes a liquid replenishing tank and a second water pump for storing and transporting additional coolant.

[0012] Furthermore, in the above-mentioned automobile coolant vacuum filling system, the multiple valves also include a shut-off valve and a second three-way valve for controlling fluid flow during coolant filtration and recovery operations.

[0013] Furthermore, the above-mentioned automobile coolant vacuum filling system also includes a vacuum pump switch and a wash and replenishment return switch, and the vacuum pump switch and the wash and replenishment return switch are electrically connected to the controller for controlling the operation of the vacuum pump and the first water pump.

[0014] In a second aspect, the present invention provides a method for using the automotive coolant vacuum filling system described in any one of the first aspects above, employing the following technical solutions: evacuating the cooling system of the vehicle to be filled by means of the vacuum pump; Use the digital pressure sensor to monitor system pressure and perform leak checks; Using vacuum pressure to fill the coolant from the liquid storage tank into the cooling system of the vehicle to be filled; Using the coolant filter and the first water pump to filter and clean the coolant; and The coolant is recovered from the vehicle to be cleaned into the liquid storage tank.

[0015] Furthermore, the above method further includes using the flow meter to measure the amount of coolant added to the vehicle to be filled.

[0016] Furthermore, the above method also includes using the flow control valve and the pressure air source to adjust the coolant flow during the filling process.

[0017] Furthermore, the above method also includes using the observation mirror to monitor the coolant level in the liquid storage tank.

[0018] Furthermore, the above method also includes using the fluid replenishment tank and the second water pump to replenish additional coolant when needed.

[0019] Furthermore, the above method also includes using the controller to automatically control the vacuuming, leak checking, filling, filtering and cleaning, and coolant recovery processes according to preset parameters.

[0020] In summary, compared with the prior art, the automotive coolant vacuum filling system and method provided by the present invention can significantly improve the coolant filling efficiency, ensure the filling quality, and reduce coolant consumption. The system adopts a combination of vacuum extraction and pressure filling to quickly complete coolant filling and reduce operation time. By precisely controlling the vacuum degree and filling pressure, the system can ensure that the coolant fully fills the entire cooling system and avoids residual bubbles. In addition, the system integrates multiple functions such as leak detection, filtration and cleaning, and coolant recovery, which can not only detect system leakage problems in a timely manner, but also extend the service life of the coolant and reduce waste liquid emissions. This multifunctional integrated design can simplify the maintenance process, improve work efficiency, and at the same time reduce operating costs and environmental impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The present invention is a system diagram of a coolant vacuum filling system for a vehicle.

[0023] Explanation of the accompanying symbols: 1. Vacuum pump; 2. Drying filter; 3. First three-way valve; 4. First three-way connector; 5. First solenoid valve; 6. Second three-way connector; 7. Second solenoid valve; 8. Vehicle to be refueled; 9. Digital pressure sensor; 10. Drain switch; 11. First mode selection valve; 12. Vacuum pump switch; 13. Wash and replenish switch; 14. Second mode selection valve; 15. Main power supply; 16. Flow meter; 17. Flow control valve; 18. Pressure gas source; 19. Liquid storage tank; 20. Observation mirror; 21. Second solenoid valve; 22. Refill solenoid valve; 23. Third three-way connector; 24. First water pump; 25. Stop valve; 26. Coolant filter; 27. Vehicle to be cleaned; 28. Second three-way valve; 29. ​​Refill tank; 30. Second water pump. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0025] It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments of the present application. In addition, in the following embodiments, the description of each embodiment has its own focus. For parts not described in detail in one embodiment, please refer to the relevant description of other embodiments.

[0026] The method steps described in the embodiments of the present invention may be executed in the order described in the specific implementation manner, or the execution order of each step may be adjusted according to actual needs, provided that the technical problem can be solved. The execution order of each step will not be listed here one by one.

[0027] Reference Figure 1 , an embodiment of the present invention discloses an automobile coolant vacuum filling system.

[0028] A vehicle coolant vacuum filling system includes a vacuum pump 1, a drying filter 2, a liquid storage tank 19, multiple valves (such as a first three-way valve 3, a first solenoid valve 5, and a second solenoid valve 7), a digital pressure sensor 9, a coolant filter 26, a first water pump 24, mode selection valves (such as a first mode selection valve 11 and a second mode selection valve 14), and a controller.

[0029] The vacuum pump 1 is used to generate the vacuum pressure required by the system. Connected to the vacuum pump 1 is a drying filter 2, which is used to remove moisture and impurities during the vacuuming process.

[0030] The liquid storage tank 19 is used to store and supply coolant. Multiple valves are used to control fluid flow, including a first three-way valve 3, a first solenoid valve 5, and a second solenoid valve 7. The first three-way valve 3 connects the vacuum pump 1 and the filter drier 2, while the first solenoid valve 5 and the second solenoid valve 7 control the flow direction of the coolant.

[0031] A digital pressure sensor 9 is connected to multiple valves for real-time system pressure monitoring. A coolant filter 26 is also connected to the multiple valves for filtering impurities from the coolant. A first water pump 24 is connected to the coolant filter 26 and multiple valves for circulating the coolant.

[0032] The system further comprises a first mode selection valve 11 and a second mode selection valve 14, which are respectively connected to a plurality of valves for switching between vacuuming, leak checking, filling, filtering and cleaning, and coolant recovery modes.

[0033] The controller is electrically connected to the plurality of valves, the digital pressure sensor 9, the first water pump 24, the first mode selection valve 11 and the second mode selection valve 14, and is used to control the operation of the automobile coolant vacuum filling system.

[0034] In some embodiments, the system further comprises a first three-way connector 4, a second three-way connector 6, and a third three-way connector 23 for connecting additional fluid paths. A drain switch 10 is used to control fluid discharge. A main power supply 15 provides power to the system components.

[0035] Furthermore, the vehicle coolant vacuum filling system also includes a flowmeter 16. Flowmeter 16 is electrically connected to the controller and is used to measure the coolant flow rate. Flowmeter 16 is located in the pipeline between the reservoir 19 and the vehicle 8 to be filled, and is used to accurately monitor the amount of coolant being filled into the vehicle 8.

[0036] In some embodiments, the data from the flow meter 16 is transmitted to the controller, which adjusts the opening of the second solenoid valve 7 according to the flow data, thereby controlling the filling rate and total amount of coolant. This precise control helps prevent the occurrence of excessive or insufficient coolant.

[0037] The system also includes a main power supply 15, which provides power to the entire vehicle coolant vacuum filling system. This power supply 15 is connected to various electrical components in the system, including the vacuum pump 1, the first water pump 24, the second water pump 30, the solenoid valves 5 and 7, the digital pressure sensor 9, and the controller. This power supply 15 ensures the proper operation of all system components, maintaining system stability and reliability.

[0038] Furthermore, the automotive coolant vacuum filling system also includes a flow control valve 17 and a pressure air source 18. Flow control valve 17, located in the pipeline between a reservoir 19 and the vehicle 8 to be filled, precisely regulates the coolant flow rate. Pressure air source 18 is connected to flow control valve 17 to provide the required pressure for flow control.

[0039] In some embodiments, the flow control valve 17 is an adjustable valve that can change its opening according to system requirements. The pressure air source 18 provides a stable air pressure to the flow control valve 17 to ensure that the coolant flows at an appropriate rate during the filling process.

[0040] The system can precisely control the coolant filling rate by adjusting the opening of the flow control valve 17 and the output pressure of the pressure air source 18. This precise control is crucial to ensure that the cooling system is filled with the appropriate amount of coolant, helping to prevent over- or under-cooling.

[0041] During the filling process, the controller automatically adjusts the opening of the flow control valve 17 and the output pressure of the pressure gas source 18 based on the feedback data from the digital pressure sensor 9 and the flow meter 16. This automatic adjustment mechanism ensures the stability and accuracy of the filling process while reducing the possibility of human error.

[0042] The combined use of flow control valve 17 and pressure air source 18 enhances the flexibility and adaptability of the automotive coolant vacuum filling system. The system can adjust filling parameters according to the cooling system capacity and structural characteristics of different vehicle models to achieve the best filling effect.

[0043] Furthermore, the automotive coolant vacuum filling system includes a reservoir 19. Reservoir 19 is used to store and supply coolant. A sight glass 20 is provided on reservoir 19. Sight glass 20 allows an operator to directly observe the coolant level within reservoir 19, facilitating monitoring of coolant inventory and filling status.

[0044] In some embodiments, the sight glass 20 is made of a transparent material, such as high temperature resistant glass or transparent plastic. The design of the sight glass 20 takes into account pressure resistance and sealing properties to ensure that no leakage occurs during system operation.

[0045] The system also includes a second solenoid valve 21 and a refill solenoid valve 22. The second solenoid valve 21 is connected between the liquid storage tank 19 and the third three-way connector 23 to control the flow of coolant from the liquid storage tank 19. The refill solenoid valve 22 is connected between the refill tank 29 and the liquid storage tank 19 to control the replenishment of coolant from the refill tank 29 to the liquid storage tank 19.

[0046] In some embodiments, the second solenoid valve 21 and the refill solenoid valve 22 are controlled by a controller. The controller automatically controls the opening and closing of these solenoid valves based on the system's operating mode and the coolant level. For example, when the coolant level in the reservoir 19 falls below a preset value, the controller opens the refill solenoid valve 22, allowing coolant to flow from the refill tank 29 into the reservoir 19 until the level returns to a normal range.

[0047] The use of the second solenoid valve 21 and the liquid replenishment solenoid valve 22 enhances the automation and operational flexibility of the system. These solenoid valves can accurately control the flow of coolant, ensuring the normal operation of the system in different working modes while reducing the need for manual operation.

[0048] Furthermore, the vehicle coolant vacuum filling system also includes a refill tank 29 and a second water pump 30. Refill tank 29 is used to store additional coolant for use when needed by the system. Second water pump 30 is connected between refill tank 29 and reservoir tank 19 to transfer coolant from refill tank 29 to reservoir tank 19.

[0049] In some embodiments, the capacity of the refill tank 29 is greater than that of the liquid storage tank 19 to ensure that the system has sufficient coolant reserves. The refill tank 29 is made of corrosion-resistant materials, such as stainless steel or high-density polyethylene, to prevent the coolant from corroding the container.

[0050] The second water pump 30 is an electric pump that is started and stopped by the controller. When the coolant level in the liquid storage tank 19 falls below a preset value, the controller starts the second water pump 30 to pump coolant from the liquid replenishing tank 29 into the liquid storage tank 19 until the coolant level returns to a normal range.

[0051] In some embodiments, a liquid level sensor is provided on the liquid replenishing tank 29 for monitoring the coolant level in the liquid replenishing tank 29. The liquid level sensor is electrically connected to the controller. When the coolant level in the liquid replenishing tank 29 is lower than a preset value, the controller issues an alarm to remind the operator to replenish the coolant in time.

[0052] The provision of the refill tank 29 and the second water pump 30 enhances the automation and operational flexibility of the vehicle coolant vacuum filling system. This design ensures a constant supply of coolant during extended operation or when handling multiple vehicles, reducing the frequency of manual coolant replenishment and improving operational efficiency.

[0053] Furthermore, the automobile coolant vacuum filling system further comprises a shut-off valve 25 and a second three-way valve 28. The shut-off valve 25 and the second three-way valve 28 are important components for controlling fluid flow in the system, and particularly play a key role during coolant filtration and recovery operations.

[0054] A shutoff valve 25 is provided in the pipeline between the coolant filter 26 and the second three-way valve 28. The primary function of the shutoff valve 25 is to control whether coolant flows through the coolant filter 26. During coolant filtering operation, the shutoff valve 25 is open, allowing coolant to be filtered through the coolant filter 26. In other operating modes, the shutoff valve 25 can be closed to isolate the coolant filter 26.

[0055] A second three-way valve 28 connects vehicle 27 to be cleaned, coolant filter 26, and reservoir 19. This valve controls the flow path of the coolant. During the coolant filtration operation, the valve connects vehicle 27 to coolant filter 26, forming a closed-loop circulation system that continuously purifies the coolant through coolant filter 26.

[0056] During the coolant recovery operation, the second three-way valve 28 changes its state to connect the vehicle to be washed 27 with the liquid storage tank 19. This configuration allows the coolant to flow from the vehicle to be washed 27 into the liquid storage tank 19, realizing the recovery and reuse of the coolant.

[0057] In some embodiments, the shutoff valve 25 and the second three-way valve 28 are controlled by a controller. The controller automatically adjusts the states of these valves based on the system's operating mode, ensuring that the coolant flows along a predetermined path during different operating phases. This automated control improves the system's operational efficiency and accuracy.

[0058] The combined use of the shut-off valve 25 and the second three-way valve 28 enhances the flexibility of the automotive coolant vacuum filling system. The system can quickly switch between coolant filtration, recovery, and other operating modes as needed to accommodate varying maintenance and service requirements.

[0059] Furthermore, the automobile coolant vacuum filling system further comprises a vacuum pump switch 12 and a wash and replenishment return switch 13. The vacuum pump switch 12 and the wash and replenishment return switch 13 are electrically connected to the controller for controlling the operation of the vacuum pump 1 and the first water pump 24.

[0060] A vacuum pump switch 12 is located on the system's control panel and controls the start and stop of vacuum pump 1. When the cooling system of vehicle 8 to be refueled needs to be evacuated, the operator activates vacuum pump 1 using switch 12. The controller receives the signal from switch 12 and controls the operation of vacuum pump 1 accordingly.

[0061] The rinse, replenish, and recycle switch 13 is also located on the system's control panel and controls the start and stop of the first water pump 24. During coolant filtration, cleaning, and recovery operations, the operator activates the first water pump 24 via the rinse, replenish, and recycle switch 13. The controller receives the signal from the rinse, replenish, and recycle switch 13 and controls the operation of the first water pump 24 accordingly.

[0062] In some embodiments, the controller automatically controls the operation of the vacuum pump 1 and the first water pump 24 based on the system's operating mode and current status. For example, when the system enters vacuum mode, the controller automatically activates the vacuum pump 1, eliminating the need for an operator to manually operate the vacuum pump switch 12. Similarly, when the system enters coolant filter cleaning mode, the controller automatically activates the first water pump 24, eliminating the need for an operator to manually operate the rinse and refill switch 13.

[0063] The provision of the vacuum pump switch 12 and the refill switch 13 enhances the operational flexibility of the automotive coolant vacuum filling system. These switches allow the operator to manually control the operation of the vacuum pump 1 and the first water pump 24 when necessary, while also supporting automated operation of the system. This design enhances the system's automation while retaining the possibility of manual intervention, adapting to varying operational needs and emergency situations.

[0064] The embodiment of the present invention also discloses a method for using the automobile coolant vacuum filling system, which includes the following steps.

[0065] During the vacuuming step, vacuum pump 1 is used to evacuate the cooling system of vehicle 8 to be refueled. Vacuum pump 1 is connected to the cooling system of vehicle 8 to be refueled via a filter drier 2, a first three-way valve 3, a first three-way connector 4, and a first solenoid valve 5. A controller activates vacuum pump 1, extracting air from the cooling system and creating a vacuum environment.

[0066] During the leak check step, digital pressure sensor 9 monitors system pressure. The controller shuts down vacuum pump 1 and associated valves, isolating the cooling system of vehicle 8 to be refueled. Digital pressure sensor 9 continuously monitors pressure changes. If the pressure rises above a preset value within a preset time, the system determines a leak.

[0067] During the filling step, coolant is added from reservoir 19 to the cooling system of vehicle 8 using vacuum pressure. The controller opens second solenoid valve 7, and the coolant, under the influence of the pressure differential, flows from reservoir 19 into the cooling system of vehicle 8. Flowmeter 16 monitors the amount of coolant being added, ensuring the appropriate amount is being added.

[0068] During the filtration and cleaning step, a first water pump 24 and a coolant filter 26 are used to filter and clean the coolant. A controller activates the first water pump 24, driving the coolant through the coolant filter 26 for filtration. A second three-way valve 28 connects the vehicle to be cleaned 27 with the coolant filter 26, forming a closed-loop circulation system.

[0069] During the coolant recovery step, coolant is recovered from vehicle 27 to be cleaned and returned to tank 19. The controller adjusts the state of second three-way valve 28 to connect vehicle 27 to tank 19. First water pump 24 is activated to pump coolant from vehicle 27 to be cleaned and transfer it to tank 19.

[0070] In some embodiments, a controller automatically controls the execution of each step based on preset parameters. For example, the controller automatically adjusts the operating time of the vacuum pump 1 based on feedback from the digital pressure sensor 9, or automatically controls the filling volume based on data from the flow meter 16. This automated control improves operational efficiency and accuracy.

[0071] Further, refer to Figure 1 The automobile coolant vacuum filling system includes a flow meter 16. The flow meter 16 is provided on a pipeline between a liquid storage tank 19 and the vehicle 8 to be filled, and is used to measure the amount of coolant added to the vehicle 8 to be filled.

[0072] During the filling process, the flow meter 16 monitors the coolant flow rate flowing through the pipeline in real time. The flow meter 16 transmits the measured data to the controller, which calculates the total amount of coolant added based on the data.

[0073] In some embodiments, the controller automatically controls the opening of the second solenoid valve 7 based on the measurement data of the flow meter 16, thereby accurately adjusting the filling rate and total amount of the coolant. This precise control helps prevent overfilling or underfilling of the coolant.

[0074] In some embodiments, flow meter 16 utilizes a turbine flow meter or electromagnetic flow meter to ensure measurement accuracy under varying flow rates and temperatures. The measurement range and accuracy of flow meter 16 are selected based on the cooling system capacity of the vehicle 8 being refueled to meet the refueling requirements of different vehicle models.

[0075] In some embodiments, the controller compares the measured data from the flow meter 16 with a preset target filling amount. When the actual filling amount reaches the target value, the controller automatically closes the second solenoid valve 7, stopping the filling process. This automated control improves the accuracy and efficiency of the filling process and reduces human error.

[0076] Furthermore, the vehicle coolant vacuum filling system includes a flow control valve 17 and a pressure air source 18. Flow control valve 17 is located in the pipeline between a reservoir 19 and the vehicle 8 to be filled, and is used to regulate the coolant flow rate. Pressure air source 18 is connected to flow control valve 17 to provide the required pressure for flow control.

[0077] In some embodiments, the flow control valve 17 is an adjustable valve that can change its opening according to system requirements. The pressure air source 18 provides a stable air pressure to the flow control valve 17 to ensure that the coolant flows at an appropriate rate during the filling process.

[0078] The system can precisely control the coolant filling rate by adjusting the opening of the flow control valve 17 and the output pressure of the pressure air source 18. This precise control is crucial to ensure that the cooling system is filled with the appropriate amount of coolant, helping to prevent over- or under-cooling.

[0079] During the filling process, the controller automatically adjusts the opening of the flow control valve 17 and the output pressure of the pressure gas source 18 based on the feedback data from the digital pressure sensor 9 and the flow meter 16. This automatic adjustment mechanism ensures the stability and accuracy of the filling process while reducing the possibility of human error.

[0080] The combined use of flow control valve 17 and pressure air source 18 enhances the flexibility and adaptability of the automotive coolant vacuum filling system. The system can adjust filling parameters according to the cooling system capacity and structural characteristics of different vehicle models to achieve the best filling effect.

[0081] Furthermore, the automotive coolant vacuum filling system includes a reservoir 19. Reservoir 19 is used to store and supply coolant. A sight glass 20 is provided on reservoir 19. Sight glass 20 allows an operator to directly observe the coolant level within reservoir 19, facilitating monitoring of coolant inventory and filling status.

[0082] In some embodiments, the sight glass 20 is made of a transparent material, such as high temperature resistant glass or transparent plastic. The design of the sight glass 20 takes into account pressure resistance and sealing properties to ensure that no leakage occurs during system operation.

[0083] Sightglass 20 is usually arranged on the side or top of fluid reservoir 19, and position selection has considered operator's sight line and operation convenience.Through sightglass 20, operator can clearly see the coolant level height of fluid reservoir 19 inside.

[0084] During system operation, the operator regularly checks the coolant level in the reservoir 19 through sight glass 20. When the coolant level falls below a preset mark, the operator knows it's time to refill. This intuitive monitoring method helps promptly identify and resolve coolant shortages, ensuring proper system operation.

[0085] In some embodiments, the sight glass 20 is marked with scales or liquid level marks so that the operator can more accurately judge the actual liquid level of the coolant. These marks help the operator accurately assess the remaining amount of coolant and decide whether to refill it.

[0086] By using the sight glass 20 to monitor the coolant level in the reservoir 19 , the operator can understand the coolant inventory of the system in real time and ensure that the coolant is always kept at an appropriate level, thereby maintaining the normal operation and efficiency of the vehicle coolant vacuum filling system.

[0087] Furthermore, the vehicle coolant vacuum filling system includes a refill tank 29 and a second water pump 30. Refill tank 29 is used to store additional coolant for use when needed. Second water pump 30 is connected between refill tank 29 and reservoir tank 19 to transfer coolant from refill tank 29 to reservoir tank 19.

[0088] In some embodiments, the capacity of the refill tank 29 is greater than that of the liquid storage tank 19 to ensure that the system has sufficient coolant reserves. The refill tank 29 is made of corrosion-resistant materials, such as stainless steel or high-density polyethylene, to prevent the coolant from corroding the container.

[0089] The second water pump 30 is an electric pump that is started and stopped by the controller. When the coolant level in the liquid storage tank 19 falls below a preset value, the controller starts the second water pump 30 to pump coolant from the liquid replenishing tank 29 into the liquid storage tank 19 until the coolant level returns to a normal range.

[0090] In some embodiments, a liquid level sensor is provided on the liquid replenishing tank 29 for monitoring the coolant level in the liquid replenishing tank 29. The liquid level sensor is electrically connected to the controller. When the coolant level in the liquid replenishing tank 29 is lower than a preset value, the controller issues an alarm to remind the operator to replenish the coolant in time.

[0091] The provision of the refill tank 29 and the second water pump 30 enhances the automation and operational flexibility of the vehicle coolant vacuum filling system. This design ensures a constant supply of coolant during extended operation or when handling multiple vehicles, reducing the frequency of manual coolant replenishment and improving operational efficiency.

[0092] In some embodiments, the system performs a coolant recovery operation. The controller activates the second water pump 30 to transfer the coolant from the liquid storage tank 19 to the liquid replenishment tank 29. This recovery operation helps reuse the coolant, reduces waste, and prepares for subsequent refilling operations.

[0093] Furthermore, the automotive coolant vacuum filling system includes a controller and a main power supply 15. The controller is electrically connected to various components in the system and is used to automatically control the vacuuming, leak detection, filling, filtration and cleaning, and coolant recovery processes according to preset parameters. The main power supply 15 provides power to the entire system, ensuring the normal operation of the controller and other electrical components.

[0094] During the vacuuming process, the controller automatically controls the operation of the vacuum pump 1 according to the preset vacuum degree parameters. The controller monitors the system pressure in real time through the digital pressure sensor 9. When the preset vacuum degree is reached, the controller automatically stops the operation of the vacuum pump 1.

[0095] During the leak detection process, the controller automatically determines the leak based on the preset pressure change threshold and detection time. The controller monitors the system pressure change through the digital pressure sensor 9. If the pressure change exceeds the threshold within the preset time, the controller determines that there is a leak and issues an alarm.

[0096] During the filling process, the controller automatically controls the opening and closing of the second solenoid valve 7 according to the preset filling amount parameters. The controller monitors the filling amount in real time through the flow meter 16. When the preset filling amount is reached, the controller automatically closes the second solenoid valve 7 to stop filling.

[0097] During the filtration and cleaning process, the controller automatically creates a closed-loop circulation path. It controls second three-way valve 28 to connect vehicle 27 to be cleaned and coolant filter 26, activates first water pump 24, and opens shutoff valve 25. Coolant continuously circulates through this closed-loop path, passing through coolant filter 26 for filtration and cleaning.

[0098] During the coolant recovery process, the controller automatically controls the recovery process based on preset recovery volume parameters. The controller activates the second three-way valve 28 to connect the vehicle 27 to be cleaned and the liquid storage tank 19, and activates the first water pump 24 to pump coolant from the vehicle 27 to be cleaned and transfer it to the liquid storage tank 19. When the recovery volume reaches a preset value, the controller automatically stops the recovery process.

[0099] In some embodiments, the controller also automatically adjusts operating parameters based on the system status. For example, during the filling process, if the controller detects that the filling speed is too slow, the controller automatically increases the opening of the flow control valve 17 or increases the output pressure of the pressure gas source 18 to speed up the filling speed.

[0100] In some embodiments, the controller monitors the power supply status of the system through the main power supply 15. If a power supply anomaly is detected, the controller automatically stops the current operation and issues an alarm to prevent system failure due to power problems.

[0101] Through this automated control, the automotive coolant vacuum filling system can perform various operations efficiently and accurately, reducing human operating errors and improving work efficiency.

[0102] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An automobile coolant vacuum filling system, characterized in that: include: A vacuum pump (1) for generating the vacuum pressure required by the system; A drying filter (2) connected to the vacuum pump (1) for removing moisture and impurities during the vacuuming process; A liquid storage tank (19), for storing and supplying coolant; A plurality of valves for controlling fluid flow, the plurality of valves comprising a first three-way valve (3), a first solenoid valve (5) and a second solenoid valve (7), wherein the first three-way valve (3) is connected to the vacuum pump (1) and the drying filter (2), and the first solenoid valve (5) and the second solenoid valve (7) are used to control the flow direction of the coolant; a digital pressure sensor (9), connected to the plurality of valves, for real-time monitoring of system pressure; a coolant filter (26), connected to the plurality of valves, for filtering impurities in the coolant; a first water pump (24), connected to the coolant filter (26) and the plurality of valves, for driving the coolant circulation; A first mode selection valve (11) and a second mode selection valve (14) are respectively connected to the plurality of valves and are used to switch between vacuuming, leak checking, filling, filtering and cleaning, and coolant recovery modes; as well as A controller is electrically connected to the plurality of valves, the digital pressure sensor (9), the first water pump (24), the first mode selection valve (11) and the second mode selection valve (14), and is used to control the operation of the automobile coolant vacuum filling system.

2. The automobile coolant vacuum filling system according to claim 1, characterized in that: The invention also includes a flow meter (16), which is electrically connected to the controller and is used to measure the flow of the coolant.

3. The automobile coolant vacuum filling system according to claim 1, characterized in that: It also includes a flow control valve (17) and a pressure gas source (18) for adjusting the flow of the coolant during the filling process.

4. The automobile coolant vacuum filling system according to claim 1, characterized in that: It also includes an observation mirror (20), which is arranged on the liquid storage tank (19) and is used to observe the coolant level.

5. The automobile coolant vacuum filling system according to claim 1, characterized in that: The invention also includes a liquid replenishing tank (29) and a second water pump (30) for storing and delivering additional coolant.

6. The automobile coolant vacuum filling system according to claim 1, characterized in that: The plurality of valves also includes a shutoff valve (25) and a second three-way valve (28) for controlling fluid flow during coolant filtration and recovery operations.

7. The automobile coolant vacuum filling system according to claim 1, characterized in that: It also includes a vacuum pump switch (12) and a wash and replenishment return switch (13), wherein the vacuum pump switch (12) and the wash and replenishment return switch (13) are electrically connected to the controller and are used to control the operation of the vacuum pump (1) and the first water pump (24).

8. A method for using the automotive coolant vacuum filling system according to any one of claims 1 to 7, characterized in that: The following steps are involved: The cooling system of the vehicle (8) to be filled is evacuated by the vacuum pump (1); Using the digital pressure sensor (9) to monitor system pressure and perform leak checks; Using vacuum pressure to fill the coolant from the liquid storage tank (19) into the cooling system of the vehicle (8) to be filled; Using the coolant filter (26) and the first water pump (24) to filter and clean the coolant; as well as The coolant is recovered from the vehicle to be cleaned (27) into the liquid storage tank (19).

9. The method according to claim 8, characterized in that The method also includes measuring the amount of coolant added to the vehicle (8) to be filled using the flow meter (16).

10. The method according to claim 8, characterized in that The method also includes using the flow control valve (17) and the pressure gas source (18) to adjust the flow of the coolant during the filling process.

11. The method according to claim 8, characterized in that The method also includes monitoring the coolant level in the reservoir (19) using the sight glass (20).

12. The method according to claim 8, characterized in that The invention also includes using the liquid replenishing tank (29) and the second water pump (30) to replenish additional coolant when needed.

13. The method according to any one of claims 8 to 12, characterized in that The method also includes using the controller to automatically control the vacuuming, leak checking, filling, filtering and cleaning, and coolant recovery processes according to preset parameters.

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