Medium low-temperature control method and device for oil pump

Abstract

The invention relates to the technical field of control, in particular to an oil pump medium low-temperature control method and device which comprises an oil pump, an oil tank, a heating spiral pipe, a heating assembly and a temperature detection assembly. The heating spiral pipe communicates the oil pump with the oil tank; the first heat conduction cavity is formed in the outer side of the heating spiral pipe, the second heat conduction cavity is formed in the outer side of the oil tank, the first heat conduction cavity communicates with the second heat conduction cavity, and the first control valve controls connection and disconnection of the heater and the first heat conduction cavity; the second control valve controls connection and disconnection of the heater and the second heat conduction cavity. The first temperature sensor is used for detecting first temperature of an outlet of the heating spiral pipe; the environment temperature sensor is used for detecting the external environment temperature; the second temperature sensor is used for detecting a second temperature in the mailbox. A small part of oil entering the oil pump can be directly heated, and meanwhile the oil tank is heated so that the starting efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the field of control technologies, and particularly to a method and device for controlling the low temperature of the medium of an oil pump. Background Art

[0002] Lubricating oil pumps play a crucial role in industrial applications and various mechanical equipment. Their main function is to provide necessary lubrication for mechanical components, reduce wear and extend the service life of the equipment. However, in a low-temperature environment, the viscosity of the lubricating oil will increase significantly, which will not only cause difficulties in starting the lubricating oil pump, but also may lead to a decrease in the efficiency of the oil pump, an increase in energy consumption, and even mechanical failures. In order to overcome these problems, it is necessary to control the low temperature of the medium of the lubricating oil. The background art usually includes using a heating device to preheat the lubricating oil to ensure that it reaches an appropriate working viscosity before entering the oil pump.

[0003] However, the existing method of directly heating the fuel tank requires a longer heating time due to the large amount of oil to be heated, thus reducing the starting efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and device for controlling the low temperature of the medium of an oil pump, aiming to directly heat a small part of the oil entering the oil pump, and at the same time heat the fuel tank, so as to improve the heating efficiency and thus improve the starting efficiency.

[0005] To achieve the above object, in a first aspect, the present invention provides a device for controlling the low temperature of the medium of an oil pump, including an oil pump, a fuel tank, a heating spiral tube, a heating component, and a temperature detection component; the heating spiral tube connects the oil pump and the fuel tank; the heating component includes a heater, a first heat conduction cavity, a second heat conduction cavity, a first control valve, and a second control valve; the first heat conduction cavity is arranged outside the heating spiral tube, the second heat conduction cavity is arranged outside the fuel tank, the first heat conduction cavity and the second heat conduction cavity are connected, the first control valve controls the on-off of the heater and the first heat conduction cavity; the second control valve controls the on-off of the heater and the second heat conduction cavity; the temperature detection component includes a first temperature sensor, an ambient temperature sensor, and a second temperature sensor, the first temperature sensor is used to detect the first temperature at the outlet of the heating spiral tube; the ambient temperature sensor is used to detect the external ambient temperature; the second temperature sensor is used to detect the second temperature in the fuel tank.

[0006] Wherein, the heating component further includes a check valve, and the check valve is arranged at the connection of the first heat conduction cavity and the second heat conduction cavity.

[0007] Wherein, the heating component further includes a heat insulation layer, and the heat insulation layer is arranged outside the first heat conduction cavity and the second heat conduction cavity.

[0008] Among them, the fuel tank includes a tank body and a plurality of heat conducting fins. The plurality of heat conducting fins pass through the tank body and are located in the second heat conducting cavity.

[0009] Among them, the heater includes a heating channel, a circulation fan, a resistance grid and a power supply unit. The heating channel communicates with the first heat conducting cavity and the second heat conducting cavity. The resistance grid is arranged in the heating channel. The circulation fan is arranged on one side of the resistance grid. The power supply unit is connected to the resistance grid and the circulation fan.

[0010] Among them, the heater further includes an isolation frame, and the isolation frame is arranged between the heating channel and the resistance grid.

[0011] Among them, the heater includes a stirring motor, a stirring rod and stirring blades. The stirring rod is rotatably arranged in the fuel tank. The stirring blades are fixedly connected to the stirring rod. The output end of the stirring motor is connected to the stirring rod.

[0012] In a second aspect, the present invention further provides a method for controlling the low temperature of the medium of an oil pump, including:

[0013] Detecting the ambient temperature through an ambient temperature sensor, detecting the first temperature at the outlet of the first heat conducting cavity through a first temperature sensor; detecting the second temperature in the second heat conducting cavity through a second temperature sensor;

[0014] When the difference between the ambient temperature and the second temperature is greater than a first preset value, open the first control valve to enable the high-temperature gas generated by the heater to pass through the first heat conducting cavity and then through the second heat conducting cavity for circulation;

[0015] When the difference between the ambient temperature and the second temperature is less than the first preset value, close the first control valve to enable the high-temperature gas generated by the heater to pass through the second heat conducting cavity for circulation;

[0016] Correcting the opening degree of the first control valve based on the difference between the first temperature and the target temperature;

[0017] After the first temperature reaches the target temperature, start the lubricating oil pump to control the lubricating oil pump to run at the target speed.

[0018] Among them, before detecting the ambient temperature through the ambient temperature sensor; detecting the first temperature at the outlet of the first heat conducting cavity through the first temperature sensor; detecting the second temperature in the second heat conducting cavity through the second temperature sensor, the control method further includes:

[0019] Preheating by pre-opening the heater according to historical vehicle usage data.

[0020] Among them, the specific steps of preheating by pre-opening the heater according to historical vehicle usage data include:

[0021] Collect the daily vehicle usage data of the vehicle owner, where the daily vehicle usage data includes the start time and the driving route;

[0022] Extract typical vehicle usage time periods based on the daily vehicle usage data;

[0023] Real-time monitor the ambient temperature and combine historical temperature data to predict future temperature data;

[0024] When the future temperature data during the future vehicle usage period will be lower than the threshold, trigger a preheating instruction;

[0025] After triggering the preheating instruction, calculate the time to turn on the heater in advance based on the time required for the lubricating oil to reach the optimal working temperature and the estimated vehicle usage time, and turn on the heater based on the time to turn on the heater in advance.

[0026] A method and device for controlling the low temperature of the medium of an oil pump according to the present invention. The oil pump pumps the lubricating oil out of the fuel tank and transports it to various parts that need lubrication through a series of pipelines. The fuel tank is the basic container for storing the lubricating oil, and heat preservation measures are considered in the design to reduce heat loss. The heating spiral tube is connected between the oil pump and the fuel tank, increasing the path length of the lubricating oil during the heating process and improving the heating efficiency. This design allows the lubricating oil to be fully heated when flowing through the heating spiral tube. The heater provides the main heat source, which can be an electric heater or utilize the waste heat of other systems (such as engine coolant) for heating. The first heat conduction cavity is located outside the heating spiral tube and is used for initially heating the lubricating oil flowing from the fuel tank to the oil pump, enhancing the heating effect. The second heat conduction cavity is arranged outside the fuel tank and is mainly used to maintain the overall temperature of the lubricating oil in the fuel tank, preventing the lubricating oil from cooling again due to the low external temperature. The first control valve controls the on-off between the heater and the first heat conduction cavity and decides whether to supply heat to the first heat conduction cavity according to actual needs. The second control valve controls the on-off between the heater and the second heat conduction cavity to ensure that the lubricating oil in the fuel tank is maintained within an appropriate working temperature range. The first temperature sensor is installed at the outlet of the heating spiral tube and is used to real-time monitor the temperature of the lubricating oil after heating, that is, the first temperature, so as to evaluate the heating effect and adjust the heating strategy accordingly. The ambient temperature sensor is placed outside the device and is used to measure the external ambient temperature, providing reference data for the control system to judge whether to start the preheating program. The second temperature sensor: is installed inside the fuel tank and is used to detect the actual temperature of the lubricating oil in the fuel tank, that is, the second temperature, to ensure that the lubricating oil in the fuel tank is always in an ideal working temperature range.

[0027] When the ambient temperature sensor detects that the outside temperature is lower than the set threshold, it indicates that the current conditions are not conducive to the rapid heating of the lubricating oil to the operating temperature. At this time, the control system will make a judgment based on the pre-set logic: if the difference between the ambient temperature and the second temperature (the temperature of the lubricating oil in the fuel tank) exceeds a certain range, the first control valve will be opened, allowing the high-temperature gas to first pass through the first heat conduction cavity and then flow to the second heat conduction cavity, forming a circulating heating mode to accelerate the heating process of the lubricating oil. If the difference between the ambient temperature and the second temperature is less than a specific threshold, the first control valve will be closed, and the high-temperature gas will directly enter the second heat conduction cavity, focusing on maintaining the temperature of the lubricating oil in the fuel tank and reducing unnecessary energy consumption. Based on the difference between the first temperature feedback by the first temperature sensor and the target temperature, the system can dynamically adjust the opening degree of the first control valve to optimize the heating rate, ensuring that the lubricating oil is neither overheated nor underheated, and always remains within an ideal temperature range.

[0028] This design not only improves the heating speed of the lubricating oil under low-temperature conditions but also reduces energy waste through precise temperature control, extending the service life of the equipment. At the same time, it also provides reliable lubrication protection for vehicles or other mechanical equipment under extreme weather conditions. Brief Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a structural diagram of a medium low-temperature control device for an oil pump of the present invention.

[0031] Figure 2 It is a right-side structural diagram of a medium low-temperature control device for an oil pump of the present invention.

[0032] Figure 3 It is a sectional structural diagram of a medium low-temperature control device for an oil pump of the present invention.

[0033] Figure 4 is Figure 3 A partial enlarged view of detail A.

[0034] Figure 5 It is a flowchart of a medium low-temperature control method for an oil pump of the present invention.

[0035] Figure 6 It is a flowchart of preheating by pre-opening the heater according to historical vehicle usage data of the present invention.

[0036] Oil pump 101, fuel tank 102, heating spiral tube 103, heater 106, first heat conduction cavity 107, second heat conduction cavity 108, first control valve 109, second control valve 110, first temperature sensor 111, ambient temperature sensor 112, second temperature sensor 113, one-way valve 114, heat insulation layer 115, box body 116, heat conduction fin 117, heating channel 118, circulation fan 119, resistance grid 120, power supply unit 121, isolation frame 122, stirring motor 123, stirring rod 124, stirring blade 125. Detailed implementation manners

[0037] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, in the description of the present invention, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0039] First embodiment

[0040] Please refer to Figures 1 to 4, the present invention provides a medium low-temperature control device for an oil pump 101, including an oil pump 101, an oil tank 102, a heating spiral tube 103, a heating component, and a temperature detection component; the heating spiral tube 103 connects the oil pump 101 and the oil tank 102; the heating component includes a heater 106, a first heat conduction cavity 107, a second heat conduction cavity 108, a first control valve 109, and a second control valve 110; the first heat conduction cavity 107 is arranged outside the heating spiral tube 103, the second heat conduction cavity 108 is arranged outside the oil tank 102, the first heat conduction cavity 107 and the second heat conduction cavity 108 are connected, the first control valve 109 controls the on-off of the heater 106 and the first heat conduction cavity 107; the second control valve 110 controls the on-off of the heater 106 and the second heat conduction cavity 108; the temperature detection component includes a first temperature sensor 111, an ambient temperature sensor 112, and a second temperature sensor 113, the first temperature sensor 111 is used to detect the first temperature at the outlet of the heating spiral tube 103; the ambient temperature sensor 112 is used to detect the external ambient temperature; the second temperature sensor 113 is used to detect the second temperature in the oil tank.

[0041] In this embodiment, the oil pump 101 pumps lubricating oil out of the oil tank 102 and transports it to various parts that need lubrication through a series of pipelines. The oil tank 102 is the basic container for storing lubricating oil, and heat preservation measures are considered in the design to reduce heat loss. The heating spiral tube 103 is connected between the oil pump 101 and the oil tank 102, increasing the path length of the lubricating oil during the heating process and improving the heating efficiency. This design allows the lubricating oil to be fully heated when flowing through the heating spiral tube 103. The heater 106 provides the main heat source, which can be an electric heater 106 or use the waste heat of other systems (such as engine coolant) for heating. The first heat conduction cavity 107 is located outside the heating spiral tube 103 and is used to initially heat the lubricating oil flowing from the oil tank 102 into the oil pump 101, enhancing the heating effect. The second heat conduction cavity 108 is arranged outside the oil tank 102 and is mainly used to maintain the overall temperature of the lubricating oil in the oil tank 102 and prevent the lubricating oil from cooling again due to the low external temperature. The first control valve 109 controls the on-off between the heater 106 and the first heat conduction cavity 107 and decides whether to supply heat to the first heat conduction cavity 107 according to actual needs. The second control valve 110 controls the on-off between the heater 106 and the second heat conduction cavity 108 to ensure that the lubricating oil in the oil tank 102 is maintained within an appropriate working temperature range. The first temperature sensor 111 is installed at the outlet of the heating spiral tube 103 and is used to monitor the temperature of the lubricating oil after heating in real time, that is, the first temperature, so as to evaluate the heating effect and adjust the heating strategy accordingly. The ambient temperature sensor 112 is placed outside the device and is used to measure the external ambient temperature, providing reference data for the control system to judge whether to start the preheating program. The second temperature sensor 113: is installed inside the oil tank 102 and is used to detect the actual temperature of the lubricating oil in the oil tank 102, that is, the second temperature, to ensure that the lubricating oil in the oil tank 102 is always within an ideal working temperature range.

[0042] When the ambient temperature sensor 112 detects that the external temperature is lower than the set threshold, it indicates that the current conditions are not conducive to the rapid heating of the lubricating oil to the working temperature. At this time, the control system will make a judgment based on the pre-set logic: if the difference between the ambient temperature and the second temperature (the temperature of the lubricating oil in the oil tank 102) exceeds a certain range, the first control valve 109 will be opened, allowing the high-temperature gas to first pass through the first heat conduction cavity 107 and then flow to the second heat conduction cavity 108 to form a circulating heating mode, accelerating the heating process of the lubricating oil. If the difference between the ambient temperature and the second temperature is less than a specific threshold, the first control valve 109 will be closed, and the high-temperature gas will directly enter the second heat conduction cavity 108 to focus on maintaining the temperature of the lubricating oil in the oil tank 102 and reducing unnecessary energy consumption. Based on the difference between the first temperature feedback by the first temperature sensor 111 and the target temperature, the system can dynamically adjust the opening degree of the first control valve 109 to optimize the heating rate, ensuring that the lubricating oil is neither overheated nor underheated and always remains within an ideal temperature range.

[0043] This design not only improves the heating speed of the lubricating oil under low-temperature conditions, but also reduces energy waste through precise temperature control, prolongs the service life of the equipment. At the same time, it also provides reliable lubrication guarantee for vehicles or other mechanical equipment under extreme weather conditions.

[0044] The heating component further includes a check valve 114, and the check valve 114 is arranged at the connection between the first heat-conducting cavity 107 and the second heat-conducting cavity 108.

[0045] To ensure that the high-temperature gas flows only in one direction and avoid backflow caused by pressure changes or system failures, the present invention provides a check valve 114 at the connection between the first heat-conducting cavity 107 and the second heat-conducting cavity 108. This design can effectively prevent the cooled gas from flowing back into the first heat-conducting cavity 107, ensuring the continuity and efficiency of the heating process.

[0046] The heating component further includes a heat-insulating layer 115, and the heat-insulating layer 115 is arranged outside the first heat-conducting cavity 107 and the second heat-conducting cavity 108.

[0047] Considering the influence of heat loss on the heating efficiency, the present invention also adds a heat-insulating layer 115 outside the first heat-conducting cavity 107 and the second heat-conducting cavity 108. The heat-insulating layer 115 is made of high-efficiency heat-insulating materials (such as fiberglass, polyurethane foam, etc.), which can significantly reduce the influence of the external environment on the internal heat, thereby accelerating the heating speed of the lubricating oil and reducing energy consumption.

[0048] The fuel tank 102 includes a tank body 116 and a plurality of heat-conducting fins 117. The plurality of heat-conducting fins 117 penetrate through the tank body 116 and are located inside the second heat-conducting cavity 108.

[0049] The tank body 116 is the main part of the fuel tank 102 for storing lubricating oil. Its design takes into account heat preservation measures and requirements for easy maintenance. The heat-conducting fins 117 are installed in the fuel tank 102 to enhance the heat conduction efficiency inside the fuel tank 102. These heat-conducting fins 117 penetrate through the wall of the tank body 116 and are directly exposed inside the second heat-conducting cavity 108. When the second heat-conducting cavity 108 is heated, the heat-conducting fins 117 can quickly transfer heat to the lubricating oil inside the fuel tank 102, promoting a uniform and rapid heating process.

[0050] The heater 106 includes a heating channel 118, a circulation fan 119, a resistance grid 120, and a power supply unit 121. The heating channel 118 communicates with the first heat conduction cavity 107 and the second heat conduction cavity 108. The resistance grid 120 is disposed within the heating channel 118. The circulation fan 119 is disposed on one side of the resistance grid 120. The power supply unit 121 is connected to the resistance grid 120 and the circulation fan 119.

[0051] The heating channel 118 serves as the main path for the flow of heated gas. The heating channel 118 communicates with the first heat conduction cavity 107 and the second heat conduction cavity 108, forming a complete circulation loop. This design ensures that the high-temperature gas can be effectively distributed throughout the system, providing sufficient heat for the lubricating oil. The resistance grid 120 is located inside the heating channel 118 and is a key component for generating heat. The resistance grid 120 is heated by an electric current, converting electrical energy into heat energy, and then heating the gas passing through the heating channel 118. The circulation fan 119 is disposed on one side of the resistance grid 120 and is used to push air or other heating media to flow rapidly within the heating channel 118, thereby accelerating the heat transfer process.

[0052] The power supply unit 121 is connected to the resistance grid 120 and the circulation fan 119, providing the necessary power support for them.

[0053] The heater 106 further includes an isolation frame 122, and the isolation frame 122 is disposed between the heating channel 118 and the resistance grid 120.

[0054] The isolation frame 122 can not only enhance the safety of the device but also help maintain the air flow direction within the heating channel 118, improving the heating efficiency.

[0055] The heater 106 includes a stirring motor 123, a stirring rod 124, and stirring blades 125. The stirring rod 124 is rotatably disposed within the fuel tank 102. The stirring blades 125 are fixedly connected to the stirring rod 124. The output end of the stirring motor 123 is connected to the stirring rod 124.

[0056] The stirring motor 123 is installed outside the fuel tank 102, and its output end is directly connected to the stirring rod 124, providing a power source for the stirring system. When selecting the stirring motor 123, factors such as torque size, speed adjustment range, and operation stability need to be considered. The stirring rod 124 penetrates the wall surface of the fuel tank 102 and extends into the interior of the fuel tank 102. Multiple groups of stirring blades 125 are fixed to the stirring rod 124. When the stirring motor 123 is started, the stirring rod 124 drives the stirring blades 125 to rotate, promoting the full mixing of the lubricating oil within the fuel tank 102, avoiding local overheating or uneven cooling. In addition, the stirring system helps to accelerate the overall heating rate of the lubricating oil, enabling it to reach the target temperature more quickly.

[0057] Second Embodiment

[0058] Please refer to Figures 5 to 6 , the present invention also provides a method for controlling the low temperature of the medium of an oil pump, including:

[0059] S101 Preheat by turning on the heater in advance according to historical vehicle usage data;

[0060] The specific steps include:

[0061] S201 Collect the daily vehicle usage data of the vehicle owner, where the daily vehicle usage data includes the start time and the driving route;

[0062] Automatically record the start time of each vehicle through an on-vehicle computer or a dedicated application. This includes but is not limited to the specific moment of the first start of each day. Use the GPS system or other positioning technologies to collect the driving route information commonly used by the vehicle owner. These data help to understand the owner's habitual patterns and predict possible future usage situations.

[0063] S202 Extract typical vehicle usage time periods based on the daily vehicle usage data;

[0064] Statistically analyze the collected start time and driving route data to identify the typical vehicle usage time periods of the vehicle owner. For example, if the vehicle owner usually drives to work at 7:30 in the morning on weekdays, the system will identify this pattern. Use machine learning algorithms or simple statistical methods (such as mean, mode) to determine the most frequently used time periods. This can more accurately predict future vehicle usage requirements.

[0065] S203 Monitor the ambient temperature in real time and predict future temperature data in combination with historical temperature data;

[0066] The ambient temperature sensor installed outside the vehicle continuously monitors the current ambient temperature and transmits the data to the central control system of the vehicle. Combine the temperature change trend over a past period of time and the weather forecast information to predict the temperature change situation in the next few days. Modern vehicles are usually equipped with the function of connecting to the Internet and can obtain the latest weather forecast data through online services. Use appropriate mathematical models (such as time series analysis, regression models, etc.) to predict the temperature within a specific future time period. This step is crucial for determining whether to activate the preheating function.

[0067] S204 Trigger a preheating instruction when the future temperature data in the future vehicle usage period will be lower than the threshold;

[0068] According to the optimal operating temperature requirements of the lubricating oil, a low-temperature threshold (such as below 0°C) is set. When it is predicted that the ambient temperature during the future vehicle usage period will be lower than this threshold, the system will automatically trigger a preheating instruction. Considering the influence of factors such as different regions and seasons, this threshold can be dynamically adjusted according to the actual situation. In addition, multiple thresholds can be set to meet different heating intensity requirements.

[0069] After S205 triggers the preheating instruction, calculate the time to turn on the heater in advance based on the time required for the lubricating oil to reach the optimal operating temperature and the estimated vehicle usage time, and turn on the heater based on the time to turn on the heater in advance.

[0070] Based on past experience data or experimental results, determine the approximate time required for the lubricating oil to rise from the current temperature to the optimal operating temperature. For example, if it takes 30 minutes to heat the lubricating oil to the appropriate operating temperature and the vehicle owner usually uses the vehicle at 7:30 in the morning, the heater should be automatically started at 7:00 in the morning. Considering the changes in external conditions (such as temperature fluctuations), the system should have the ability to dynamically adjust the preheating time. For example, if the temperature drops suddenly at night, the system may start the heating process earlier. Once the appropriate preheating time is determined, the system will automatically activate the lubricating oil heater at the scheduled time through remote control or timing start. At the same time, the user can also manually adjust the preheating plan through the smartphone application to cope with special situations or personal preferences.

[0071] S102 detects the ambient temperature through the ambient temperature sensor, the first temperature sensor detects the first temperature at the outlet of the first heat conduction cavity; the second temperature sensor detects the second temperature in the second heat conduction cavity;

[0072] To achieve precise heating control of the lubricating oil, the present invention adopts a multi-point temperature monitoring system. This system includes an ambient temperature sensor, a first temperature sensor, and a second temperature sensor, which each undertake different monitoring tasks and jointly provide comprehensive temperature data support for the control system.

[0073] The ambient temperature sensor is installed outside the vehicle and is used to detect the external ambient temperature in real time. This sensor can sense the current environmental conditions and transmit the data to the central control system. This information is crucial for determining whether to start the preheating program.

[0074] The first temperature sensor is located at the outlet of the first heat conduction cavity and is specifically used to measure the temperature of the lubricating oil after heating (i.e., the first temperature). This data reflects the actual temperature level of the lubricating oil after the initial heating and is an important basis for evaluating the heating effect.

[0075] The second temperature sensor is set inside the second heat conduction cavity and is responsible for monitoring the overall temperature of the lubricating oil in the fuel tank (i.e., the second temperature). This helps ensure that the lubricating oil reaches an appropriate operating temperature throughout the fuel tank, avoiding local overcooling or overheating

[0076] S103 When the difference between the ambient temperature and the second temperature is greater than the first preset value, open the first control valve so that the high-temperature gas generated by the heater passes through the first heat conduction cavity and then through the second heat conduction cavity for circulation;

[0077] The system first calculates the difference between the ambient temperature and the second temperature. If this difference exceeds the pre-set first preset value (for example, 5 °C), it indicates that the current ambient temperature is low and the temperature of the lubricating oil in the fuel tank is also below the ideal operating temperature range.

[0078] When the above conditions are met, the system will automatically open the first control valve. At this time, the high-temperature gas generated by the heater will first flow through the first heat conduction cavity to preliminarily heat the lubricating oil passing through here.

[0079] After the high-temperature gas completes the preliminary heating of the lubricating oil in the first heat conduction cavity, it will continue to flow to the second heat conduction cavity to further increase the temperature of the lubricating oil in the entire fuel tank. This double-layer heating method can significantly accelerate the lubricating oil heating rate and ensure that it reaches the best working state as soon as possible.

[0080] During the entire heating process, the system continuously monitors the data of the first temperature sensor and the second temperature sensor and adjusts the heating strategy in real time. Once any abnormal situation is detected (such as the temperature rising too fast or too slow), the system will immediately take corresponding measures, such as adjusting the heating power or valve opening, to maintain a stable heating rate.

[0081] S When the difference between the ambient temperature and the second temperature is less than the first preset value, close the first control valve so that the high-temperature gas generated by the heater passes through the second heat conduction cavity for circulation;

[0082] If the difference between the ambient temperature and the second temperature is less than the first preset value (for example, within 5 °C), it means that the current ambient temperature is relatively high, or the lubricating oil in the fuel tank has approached or reached the ideal operating temperature range. At this time, the system will automatically close the first control valve and stop the high-temperature gas from flowing into the first heat conduction cavity. The purpose of this is to avoid unnecessary energy waste and prevent the lubricating oil from overheating. The high-temperature gas generated by the heater will directly enter the second heat conduction cavity, focusing on increasing the overall temperature of the lubricating oil in the fuel tank. This single-layer heating mode is more energy-efficient and suitable for situations where the ambient temperature is high or the lubricating oil has approached the target temperature.

[0083] S Correct the opening of the first control valve based on the difference between the first temperature and the target temperature;

[0084] Fuzzy logic control fuzzifies input variables (such as temperature difference, rate of change), and generates control decisions based on a rule base.

[0085] To ensure that the lubricating oil can accurately and efficiently reach the optimal working temperature, the present invention adopts an intelligent adjustment method based on fuzzy logic control to dynamically adjust the opening degree of the first control valve. This method fuzzifies input variables (such as temperature difference, rate of change), and generates control decisions based on a rule base, thereby achieving precise control of the valve opening degree.

[0086] Implementation steps:

[0087] The error e is defined as the difference between the first temperature and the target temperature, that is, e = Ttarget - T1, where Ttarget is the target temperature and T1 is the first temperature at the outlet of the first heat-conducting cavity.

[0088] The error change rate Δe calculates the rate of change of the error over time, that is, Δe = Δ(Ttarget - T1) / Δt, and is used to reflect the trend of temperature change.

[0089] The output variable is the opening adjustment amount of the control valve, which is used to determine how to change the opening degree of the first control valve to optimize the heating effect.

[0090] The fuzzy rule base is the core part of the entire fuzzy control system. It formulates a series of rules based on experience and expert knowledge to guide control decisions. The following are some example rules:

[0091] If the error is large and the error change rate is positive, then significantly increase the valve opening degree:

[0092] This means that the current temperature is far lower than the target temperature, and the temperature is rising but not fast enough. At this time, it is necessary to significantly increase the flow rate of the high-temperature gas to accelerate the heating process.

[0093] If the error is small and the error change rate is negative, then slightly decrease the valve opening degree:

[0094] When approaching the target temperature, if the temperature starts to drop, the supply of high-temperature gas should be slightly reduced to prevent overheating and maintain a stable heating rate.

[0095] Defuzzification is the process of converting the fuzzy inference result into a specific control action. The specific method includes that the fuzzy set obtained after fuzzy logic processing represents different valve opening adjustment suggestions. Calculate the weighted average of all possible adjustment amounts, and the weights are determined by the membership degrees corresponding to each adjustment amount. Finally, a specific value is obtained as the actual opening adjustment amount of the control valve.

[0096] After the first temperature reaches the target temperature, start the lubricating oil pump and control the lubricating oil pump to run at the target speed.

[0097] In order to ensure that the lubricating oil is effectively delivered to each lubrication-required part at the optimal working temperature, the present invention designs an intelligent control system. After the first temperature (i.e., the temperature of the lubricating oil at the outlet of the first heat conduction cavity) reaches the target temperature, the lubricating oil pump is automatically started and its running speed is precisely controlled.

[0098] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A medium low-temperature control device for an oil pump, comprising an oil pump and an oil tank, characterized in that, further comprising a heating spiral tube, a heating component, and a temperature detection component; the heating spiral tube connects the oil pump and the oil tank; the heating component includes a heater, a first heat conduction cavity, a second heat conduction cavity, a first control valve, and a second control valve; the first heat conduction cavity is arranged outside the heating spiral tube, the second heat conduction cavity is arranged outside the oil tank, the first heat conduction cavity and the second heat conduction cavity are connected, the first control valve controls the on-off between the heater and the first heat conduction cavity; the second control valve controls the on-off between the heater and the second heat conduction cavity; the temperature detection component includes a first temperature sensor, an ambient temperature sensor, and a second temperature sensor, the first temperature sensor is used to detect the first temperature at the outlet of the heating spiral tube; the ambient temperature sensor is used to detect the external ambient temperature; the second temperature sensor is used to detect the second temperature in the oil tank.

2. The medium low-temperature control device for an oil pump according to claim 1, characterized in that, the heating component further includes a check valve, and the check valve is arranged at the connection between the first heat conduction cavity and the second heat conduction cavity.

3. The medium low-temperature control device for an oil pump according to claim 2, characterized in that, the heating component further includes a heat insulation layer, and the heat insulation layer is arranged outside the first heat conduction cavity and the second heat conduction cavity.

4. The medium low-temperature control device for an oil pump according to claim 3, characterized in that, the oil tank includes a tank body and a plurality of heat conduction fins, and the plurality of heat conduction fins penetrate through the tank body and are located in the second heat conduction cavity.

5. The medium low-temperature control device for an oil pump according to claim 4, characterized in that, the heater includes a heating channel, a circulation fan, a resistance network, and a power supply unit, the heating channel is connected to the first heat conduction cavity and the second heat conduction cavity, the resistance network is arranged in the heating channel, the circulation fan is arranged on one side of the resistance network, and the power supply unit is connected to the resistance network and the circulation fan.

6. The medium low-temperature control device for an oil pump according to claim 5, characterized in that, the heater further includes an isolation frame, and the isolation frame is arranged between the heating channel and the resistance network.

7. The medium low-temperature control device for an oil pump according to claim 6, characterized in that, the heater includes a stirring motor, a stirring rod, and stirring blades, the stirring rod is rotatably arranged in the oil tank, the stirring blades are fixedly connected to the stirring rod, and the output end of the stirring motor is connected to the stirring rod.

8. A method for controlling the low temperature of the medium of an oil pump, which uses the device for controlling the low temperature of the medium of an oil pump described in any one of claims 1 to 7, characterized in that, Including: detecting the ambient temperature through the ambient temperature sensor, and detecting the first temperature at the outlet of the first heat conduction cavity through the first temperature sensor; detecting the second temperature in the second heat conduction cavity through the second temperature sensor; when the difference between the ambient temperature and the second temperature is greater than a first preset value, opening the first control valve to enable the high-temperature gas generated by the heater to pass through the first heat conduction cavity and then through the second heat conduction cavity for circulation; When the difference between the ambient temperature and the second temperature is less than the first preset value, close the first control valve so that the high-temperature gas generated by the heater circulates through the second heat conduction cavity; Correct the opening degree of the first control valve based on the difference between the first temperature and the target temperature; After the first temperature reaches the target temperature, start the lubricating oil pump and control the lubricating oil pump to operate at the target speed.

9. A method for controlling the low temperature of the medium of an oil pump according to claim 8, characterized in that Detect the ambient temperature through an ambient temperature sensor; detect the first temperature at the outlet of the first heat conduction cavity through a first temperature sensor; Before detecting the second temperature in the second heat conduction cavity through a second temperature sensor, the control method further includes: According to historical vehicle usage data, pre-open the heater for preheating.

10. A method for controlling the low temperature of the medium of an oil pump according to claim 9, characterized in that The specific steps of pre-opening the heater for preheating according to the historical vehicle usage data include: Collect the daily vehicle usage data of the vehicle owner, and the daily vehicle usage data includes the start time and the driving route; Extract typical vehicle usage time periods based on the daily vehicle usage data; Real-time monitor the ambient temperature and combine historical temperature data to predict future temperature data; When the future temperature data during the future vehicle usage period will be lower than the threshold value, trigger a preheating instruction; After triggering the preheating instruction, calculate the time to turn on the heater in advance based on the time required for the lubricating oil to reach the optimal working temperature and the expected vehicle usage time, and turn on the heater based on the time to turn on the heater in advance.

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