Heat dissipation control method for multi-tube same-stroke parallel radiator

Abstract

The invention discloses a heat dissipation control method for a multi-tube same-pass parallel radiator, and belongs to the field of heat dissipation, and the method comprises the steps: obtaining the position information and size information of the multi-tube same-pass parallel radiator and the position information of a plurality of temperature sensors, and forming a temperature three-dimensional field graph; a high-temperature area with the temperature exceeding a preset value is found, and the flow of the heat dissipation pipeline closest to the high-temperature area is increased according to the position of the high-temperature area till the high-temperature area disappears; the method comprises the following steps: establishing a vehicle driving heating model, acquiring a predicted driving route of the current vehicle, estimating the current driving time of the vehicle and the driving speeds of the vehicle in different time periods, outputting a predicted temperature three-dimensional field graph by the vehicle driving heating model, and cooling and radiating in advance by a multi-tube same-pass parallel radiator according to the predicted temperature three-dimensional field graph. Through the steps, the local temperature in the automobile can be accurately controlled, and intelligent heat dissipation is conducted according to the driving condition.

Description

Technical Field

[0001] The invention relates to the field of radiators, and in particular to a heat dissipation control method for multi-tube same-path parallel radiators. Background Art

[0002] When the engine is working, a lot of heat is generated. In order to make the related parts work stably under high temperature and high pressure, the engine must dissipate the excess heat. The function of the automobile cooling system is to dissipate part of the heat absorbed by the heated parts in time to ensure that the engine works at the most suitable temperature. However, in the process of vehicle development, due to the convenient constraints of the front-end structure and styling, the matching of the cooling system may not necessarily reach the best ideal state. Regarding the problem of non-compliance with the thermal balance of the existing models, the more concentrated rectification plans are often concentrated in the following aspects: 1. Increase the size of the existing radiator, increase the core density, and increase the heat dissipation; 2. Increase the fan air volume and improve the motor efficiency; 3. Add the front-end module guide structure, such as wind gathering plates and other components, to improve the cabin pressure and improve the intake efficiency; 4. Increase the water pump flow.

[0003] However, these heat dissipation methods only improve the overall heat dissipation performance, cannot solve the problem of local hot spots, and cannot accurately control the local temperature and perform intelligent heat dissipation control according to driving conditions. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a heat dissipation control method for multi-tube parallel radiators that can accurately control local temperature and perform intelligent heat dissipation control according to driving conditions.

[0005] One of the purposes of the present invention is achieved by the following technical solution:

[0006] A heat dissipation control method for multi-tube parallel radiators comprises the following steps:

[0007] Structural design: The multi-tube parallel radiator includes a liquid inlet pipe, a liquid outlet pipe and a plurality of heat dissipation pipes. One end of each heat dissipation pipe is connected to the liquid inlet pipe, and the other end is connected to the liquid outlet pipe. The lengths of the plurality of heat dissipation pipes are the same and they are connected in parallel. Each heat dissipation pipe controls the flow of the coolant entering the heat dissipation pipe through a flow valve.

[0008] Ambient temperature collection: multiple temperature sensors are set in the area to be cooled in the vehicle, and multiple temperature sensors are set around the object to be cooled to form a three-dimensional temperature monitoring system;

[0009] Spatial positioning: obtaining the installation position information and size information of the multi-tube parallel radiator and the position information of the plurality of temperature sensors, converting the position information of the temperature sensors, placing the multi-tube parallel radiator and the temperature sensors in the same coordinate system, and forming a temperature stereoscopic field map;

[0010] Heat dissipation pipe flow control: find a high-temperature area with a temperature exceeding a preset value in the temperature stereoscopic field map, and increase the flow of the heat dissipation pipe closest to the high-temperature area according to the position of the high-temperature area until the high-temperature area disappears; when the flow of the nearest heat dissipation pipe reaches the maximum value but there is still a high-temperature area, increase the flow of the heat dissipation pipe closest to the next high-temperature area until the high-temperature area disappears;

[0011] Intelligent adjustment: Establish a vehicle driving heat generation model, collect the driving time, driving speed at different time periods and temperature stereo field map during multiple driving routes, train the vehicle driving heat generation model according to the driving time, driving speed at different time periods and temperature stereo field map, obtain the expected driving route of the car this time, estimate the driving time of the car and the driving speed at different time periods according to the driving route this time, the vehicle driving heat generation model outputs the predicted temperature stereo field map according to the driving time and the driving speed at different time periods, and the multi-tube same-route parallel radiator cools and dissipates heat in advance according to the predicted temperature stereo field map to avoid overheating of the vehicle and affecting safety.

[0012] Furthermore, in the heat dissipation pipeline flow control step, negative feedback control is adopted.

[0013] Furthermore, a flow meter is provided at the end of each heat dissipation pipeline, and the flow meter detects the actual flow in the heat dissipation pipeline.

[0014] When the error between the actual flow and the flow valve is greater than the preset value, Q o (k) = Q o (k-1)+K P (e(k)-e(k-1))+K I e(k)+K D (e(k)-2e(k-1)+e(k-2));

[0015] When the error between the actual flow and the flow valve is less than or equal to the preset value, Q o (k) = Q o (k-1);

[0016] Q o (k), Q o (k-1) are the flow valve output values ​​of the kth and k-1th times of the PID controller respectively; K P, K I , K D They are the proportional, integral and differential adjustment parameters of the PID controller respectively.

[0017] Furthermore, the preset error value is 0.01% to 0.2%.

[0018] Furthermore, in the intelligent adjustment step, estimating the current driving time and the driving speed of the car at different time periods according to the current driving route is specifically as follows: obtaining the speed limit, congestion conditions and road types of different sections of the current driving route, so as to predict the current driving time and the driving speed at different time periods.

[0019] Furthermore, in the intelligent adjustment step, the road types are divided into expressways, elevated roads and ordinary ground roads.

[0020] Furthermore, the heat dissipation pipe is flat and fits the engine.

[0021] Furthermore, in the heat dissipation pipe flow control step, when the flow of all the heat dissipation pipes reaches a maximum value but a high temperature area still exists, the rotation speed of the fan is adjusted to increase the air flow rate contacting the surface of the heat dissipation pipe.

[0022] Furthermore, when the speed of the fan is adjusted to the maximum but there is still a high temperature area, the car alarms.

[0023] Compared with the prior art, the heat dissipation control method of the multi-tube co-connected parallel radiator of the present invention obtains the installation position information, size information and position information of multiple temperature sensors of the multi-tube co-connected parallel radiator, converts the position information of the temperature sensors, places the multi-tube co-connected parallel radiator and the temperature sensors in the same coordinate system, and forms a temperature stereoscopic field map; finds a high-temperature area with a temperature exceeding a preset value in the temperature stereoscopic field map, and increases the flow rate of the heat dissipation pipe closest to the high-temperature area according to the position of the high-temperature area until the high-temperature area disappears; when the flow rate of the nearest heat dissipation pipe reaches the maximum value but there is still a high-temperature area, increases the flow rate of the heat dissipation pipe closest to the next high-temperature area until the high-temperature area disappears; establishes a vehicle driving heating model The vehicle driving heating model is trained according to the driving time, driving speed at different time periods and temperature stereogram during multiple driving routes, and the expected driving route of the vehicle is obtained. The driving time of the vehicle and the driving speed at different time periods are estimated according to the driving route. The vehicle driving heating model outputs the predicted temperature stereogram according to the driving time and the driving speed at different time periods. The multi-tube same-route parallel radiator cools and dissipates heat in advance according to the predicted temperature stereogram to avoid overheating of the vehicle and affect safety. Through the above steps, the local temperature inside the vehicle can be accurately controlled, and intelligent heat dissipation can be performed according to the driving conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of the heat dissipation control method of the multi-tube parallel radiator of the present invention;

[0025] Figure 2 It is a schematic diagram of a multi-tube radiator connected in parallel with the same path according to the present invention.

[0026] In the figure: 10, liquid inlet pipe; 20, liquid outlet pipe; 30, heat dissipation pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The present application discloses a heat dissipation control method for a multi-tube parallel radiator for adjusting the temperature of a sealed environment, such as a home, a restaurant, an office, etc. The heat dissipation control method for a multi-tube parallel radiator can be used for both heating and cooling by controlling the temperature of a heat exchange liquid or gas.

[0030] See also Figure 1 as well as Figure 2 A heat dissipation control method for a multi-tube radiator connected in parallel comprises the following steps:

[0031] Structural design: The multi-tube parallel radiator includes a liquid inlet pipe 10, a liquid outlet pipe 20 and a plurality of heat dissipation pipes 30. One end of each heat dissipation pipe 30 is connected to the liquid inlet pipe 10, and the other end is connected to the liquid outlet pipe 20. The plurality of heat dissipation pipes 30 have the same length and are connected in parallel. Each heat dissipation pipe 30 controls the flow of the coolant entering the heat dissipation pipe 30 through a flow valve.

[0032] Ambient temperature collection: multiple temperature sensors are set in the area to be cooled in the car, and multiple temperature sensors are set around the object to be cooled to form a three-dimensional temperature monitoring system;

[0033] Spatial positioning: obtain the installation position information, size information and position information of multiple temperature sensors of the multi-tube parallel radiator, convert the position information of the temperature sensor, place the multi-tube parallel radiator and the temperature sensor in the same coordinate system, and form a three-dimensional temperature field map;

[0034] Flow control of the heat dissipation pipe 30: Find the high-temperature area whose temperature exceeds the preset value in the temperature stereoscopic field map, and increase the flow of the heat dissipation pipe 30 closest to the high-temperature area according to the position of the high-temperature area until the high-temperature area disappears; when the flow of the nearest heat dissipation pipe 30 reaches the maximum value but the high-temperature area still exists, increase the flow of the heat dissipation pipe 30 closest to the next high-temperature area until the high-temperature area disappears;

[0035] Intelligent adjustment: Establish a vehicle driving heat generation model, collect driving time, driving speed at different time periods and temperature stereo field map during multiple driving routes, train the vehicle driving heat generation model according to the driving time, driving speed at different time periods and temperature stereo field map, obtain the expected driving route of the car, estimate the driving time of the car and the driving speed at different time periods according to the driving route, the vehicle driving heat generation model outputs the predicted temperature stereo field map according to the driving time and the driving speed at different time periods, and the multi-tube same-route parallel radiator cools and dissipates heat in advance according to the predicted temperature stereo field map to avoid overheating of the vehicle and affect safety.

[0036] Specifically, in the structural design step, the liquid inlet pipe 10 and the liquid outlet pipe 20 are both one-way pipes, and the two ends of each heat dissipation pipe 30 are connected to the liquid inlet pipe 10 and the liquid outlet pipe 20 respectively. The flow direction of the coolant in the liquid inlet pipe 10 and the liquid outlet pipe 20 is the same, so that the coolant of the heat dissipation pipe 30 at the end enters from the liquid inlet pipe 10 first and flows out from the end of the liquid outlet pipe 20 last, so that the temperature of the coolant in the multiple heat dissipation pipes 30 is uniform and has strong consistency. Multiple heat dissipation pipes 30 are connected in parallel with each other, and a gap is formed between two adjacent heat dissipation pipes 30. Each heat dissipation pipe 30 is flat, and multiple heat dissipation pipes 30 are located on at least one plane, so that multiple heat dissipation pipes 30 can be partially fitted with the heat dissipation component (engine) to improve the cooling effect. Or multiple heat dissipation pipes 30 are located on at least one plane, which is convenient for the installation of other components. A flow valve is provided at the connection between each heat dissipation pipe 30 and the liquid inlet pipe 10. The flow valve is used to control the flow of the liquid inlet pipe 10 entering each heat dissipation pipe 30. A flow meter is provided inside each heat dissipation pipe 30. The flow meter is used to measure the actual flow inside the heat dissipation pipe 30. The flow meter can form negative feedback on the flow in the heat dissipation pipe 30, so that the negative feedback controller (PID) can accurately control the flow valve.

[0037] When the error between the actual flow and the flow valve is greater than the preset value, Q o (k) = Q o (k-1)+K P (e(k)-e(k-1))+K I e(k)+K D (e(k)-2e(k-1)+e(k-2)); When the error between the actual flow rate and the flow valve is less than or equal to the preset value, Q o (k) = Q o (k-1); Q o (k), Q o (k-1) are the flow valve output values ​​of the kth and k-1th times of the PID controller respectively; K P , K I , K DThey are the proportional, integral and differential adjustment parameters of the PID controller respectively. The error preset value is 0.01% to 0.2%.

[0038] In the heat dissipation pipe 30 flow control step, when the flow of all heat dissipation pipes 30 reaches the maximum value but there is still a high temperature area, the fan speed is adjusted to increase the air flow rate contacting the surface of the heat dissipation pipe 30. When the fan speed is adjusted to the maximum but there is still a high temperature area, the car alarms.

[0039] In the intelligent adjustment step, the driving time and driving speed of the car at different times are estimated according to the driving route. Specifically, the speed limit, congestion and road type of different sections of the driving route are obtained to predict the driving time and driving speed at different times. Road types are divided into highways, elevated roads and ordinary ground roads.

[0040] Compared with the prior art, the heat dissipation control method of the multi-tube co-connected parallel radiator of the present invention obtains the installation position information, size information and position information of multiple temperature sensors of the multi-tube co-connected parallel radiator, converts the position information of the temperature sensor, places the multi-tube co-connected parallel radiator and the temperature sensor in the same coordinate system, and forms a temperature stereoscopic field map; finds a high-temperature area with a temperature exceeding a preset value in the temperature stereoscopic field map, and increases the flow of the heat dissipation pipe 30 closest to the high-temperature area according to the position of the high-temperature area until the high-temperature area disappears; when the flow of the nearest heat dissipation pipe 30 reaches the maximum value but there is still a high-temperature area, increases the flow of the heat dissipation pipe 30 closest to the next high-temperature area until the high-temperature area disappears; establishes a vehicle driving The heating model collects the driving time, driving speed at different time periods and temperature stereograms during multiple driving routes, trains the vehicle driving heating model according to the driving time, driving speed at different time periods and temperature stereograms, obtains the expected driving route of the car, estimates the driving time of the car and the driving speed at different time periods according to the driving route, and the vehicle driving heating model outputs the predicted temperature stereogram according to the driving time and the driving speed at different time periods. The multi-tube same-route parallel radiator cools and dissipates heat in advance according to the predicted temperature stereogram to avoid overheating of the vehicle and affect safety. Through the above steps, the local temperature inside the car can be accurately controlled and intelligent heat dissipation can be performed according to the driving conditions.

[0041] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. A heat dissipation control method for multi-tube parallel radiators, characterized in that: The following steps are involved: Structural design: The multi-tube parallel radiator includes a liquid inlet pipe, a liquid outlet pipe and a plurality of heat dissipation pipes. One end of each heat dissipation pipe is connected to the liquid inlet pipe, and the other end is connected to the liquid outlet pipe. The lengths of the plurality of heat dissipation pipes are the same and they are connected in parallel. Each heat dissipation pipe controls the flow of the coolant entering the heat dissipation pipe through a flow valve. Ambient temperature collection: multiple temperature sensors are set in the area to be cooled in the vehicle, and multiple temperature sensors are set around the object to be cooled to form a three-dimensional temperature monitoring system; Spatial positioning: obtaining the installation position information and size information of the multi-tube parallel radiator and the position information of the plurality of temperature sensors, converting the position information of the temperature sensors, placing the multi-tube parallel radiator and the temperature sensors in the same coordinate system, and forming a temperature stereoscopic field map; Heat dissipation pipe flow control: find a high-temperature area with a temperature exceeding a preset value in the temperature stereoscopic field map, and increase the flow of the heat dissipation pipe closest to the high-temperature area according to the position of the high-temperature area until the high-temperature area disappears; when the flow of the nearest heat dissipation pipe reaches the maximum value but there is still a high-temperature area, increase the flow of the heat dissipation pipe closest to the next high-temperature area until the high-temperature area disappears; Intelligent adjustment: Establish a vehicle driving heat generation model, collect the driving time, driving speed at different time periods and temperature stereo field map during multiple driving routes, train the vehicle driving heat generation model according to the driving time, driving speed at different time periods and temperature stereo field map, obtain the expected driving route of the car this time, estimate the driving time of the car and the driving speed at different time periods according to the driving route this time, the vehicle driving heat generation model outputs the predicted temperature stereo field map according to the driving time and the driving speed at different time periods, and the multi-tube same-route parallel radiator cools and dissipates heat in advance according to the predicted temperature stereo field map to avoid overheating of the vehicle and affecting safety.

2. The heat dissipation control method of multi-tube parallel radiators according to claim 1, characterized in that: In the heat dissipation pipeline flow control step, negative feedback control is adopted.

3. The heat dissipation control method of multi-tube parallel radiators according to claim 2, characterized in that: A flow meter is provided at the end of each heat dissipation pipeline, and the flow meter detects the actual flow in the heat dissipation pipeline. When the error between the actual flow and the flow valve is greater than the preset value, Q o (k) = Q o (k-1)+K P (e(k)-e(k-1))+K I e(k)+K D (e(k)-2e(k-1)+e(k-2)); When the error between the actual flow and the flow valve is less than or equal to the preset value, Q o (k) = Q o (k-1); Q o (k), Q o (k-1) are the flow valve output values ​​of the kth and k-1th times of the PID controller respectively; K P , K I , K D They are the proportional, integral and differential adjustment parameters of the PID controller respectively.

4. The heat dissipation control method of multi-tube parallel radiators according to claim 3 is characterized in that: The default error value is 0.01% to 0.2%.

5. The heat dissipation control method of multi-tube parallel radiators according to claim 1, characterized in that: In the intelligent adjustment step, the driving time of the car and the driving speed at different time periods are estimated according to the driving route as follows: the speed limit, congestion conditions and road types of different sections of the driving route are obtained, so as to predict the driving time and the driving speed at different time periods.

6. The heat dissipation control method of multi-tube parallel radiators according to claim 5, characterized in that: In the intelligent adjustment step, the road types are divided into expressways, elevated roads and ordinary ground roads.

7. The heat dissipation control method of multi-tube parallel radiators according to claim 1, characterized in that: The heat dissipation pipe is flat and fits the engine.

8. The heat dissipation control method of multi-tube parallel radiators according to claim 1, characterized in that: In the heat dissipation pipe flow control step, when the flow of all the heat dissipation pipes reaches a maximum value but there is still a high temperature area, the speed of the fan is adjusted to increase the air flow rate contacting the surface of the heat dissipation pipe.

9. The heat dissipation control method of multi-tube parallel radiators according to claim 8, characterized in that: When the speed of the fan is adjusted to the maximum but there is still a high temperature area, the car will alarm.

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