A method and system for evaluating the speed uniformity of a heat sink

Abstract

The application discloses a radiator speed uniformity evaluation method, comprising the following steps: step 1, calculating the total area A of the outlet of the radiator; step 2, setting multiple detection points on the surface of the radiator and calculating the wind speed at each detection point; step 3, calculating the area A' covered by the detection points in the set speed range; and step 4, calculating the parameter UI for evaluating the speed uniformity based on A' and A, and judging whether the uniformity meets the requirements based on the UI value. The application has the advantages that the method for calculating the uniformity is simple and fast, the radiator can be quickly evaluated to meet the requirements, the method is more intuitive than the traditional method, and the surface speed uniformity distribution can be directly observed in post-processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile detection, in particular to a radiator speed uniformity evaluation method and system. BACKGROUND

[0002] With the development of pure electric vehicles, the front grille opening area is reduced, and the position is downward, and the cooling module is required to be higher. The speed uniformity can represent the uniformity of the speed on the radiator and then affect the cooling effect. If the formula is used to calculate the cooling module uniformity, the formula is Wherein, Ai is the unit area, A is the total area, ui is the unit speed, and is the average speed.

[0003] Although the prior art calculation method can quantify the uniformity index, it cannot directly show the surface speed uniformity distribution, which is not conducive to optimization comparison, is not intuitive to show the speed distribution, cannot view the uniformity distribution in post-processing, and cannot directly and intuitively optimize the radiator based on the uniformity. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art, provide a radiator speed uniformity evaluation method and system, and realize the evaluation of the uniformity of the radiator by a new uniformity calculation method and directly give the uniformity graph.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a radiator speed uniformity evaluation method, comprising,

[0006] Step 1: calculating the total area A of the outlet of the radiator;

[0007] Step 2: setting a plurality of detection points on the surface of the radiator and calculating the wind speed at each detection point;

[0008] Step 3: calculating the area A' covered by the detection points in the set speed range;

[0009] Step 4: calculating the parameter UI for evaluating the speed uniformity based on A' and A, and judging whether the uniformity meets the requirements based on the UI value.

[0010] The set speed range in step 3 is set based on the average speed V.

[0011] The calculation of the average speed includes: calculating the average speed V of the surface of the radiator based on the wind speed corresponding to the plurality of detection points.

[0012] The set speed range V1 is set as V2

[0013] V2 and V3 are V*0.6 and V*1.4 respectively.

[0014] In step 4, the parameter UI for evaluating the uniformity of the speed is calculated as follows:

[0015] UI=A` / A.

[0016] When the value of UI is greater than a set threshold UI1, it is determined that the uniformity meets the requirements, otherwise it is determined that the uniformity does not meet the requirements.

[0017] When the value of UI meets the uniformity requirements, a uniformity distribution diagram of the heat sink is displayed, wherein the distribution diagram is a diagram showing the area occupied by the sampling points with the speed within a set speed range in the total area.

[0018] A system for evaluating the uniformity of the speed of a heat sink, comprising a collecting unit, a calculating unit and a result output unit, wherein:

[0019] The collecting unit collects the total area A of the heat sink and the wind speed of each sampling point collected through a plurality of sampling points arranged on the surface of the heat sink, and the output end is connected to the calculating unit;

[0020] The calculating unit calculates the average speed V of all sampling points and the area A` occupied by the sampling points between V*0.6 and V*1.4, and further calculates the uniformity evaluation parameter UI; the output end of the calculating unit is connected to the result output unit;

[0021] The result output unit is used to output the uniformity evaluation result according to the calculated parameter UI.

[0022] The advantage of the present application is that the method for calculating the uniformity is simple and fast, and can quickly evaluate whether the heat sink meets the requirements, is more intuitive than the traditional method, and can directly view the surface speed uniformity distribution in post-processing. BRIEF DESCRIPTION OF DRAWINGS

[0023] The content expressed by each figure in the specification of the present application and the marks in the figures are briefly described as follows:

[0024] Figure 1 It is a flow chart of the uniformity evaluation method of the present application;

[0025] Figure 2 It is a distribution diagram of the present application. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application are further described in detail below by comparing the figures and describing the optimal embodiments.

[0027] The uniformity evaluation index of the radiator in the present application refers to the wind speed on the surface of the radiator. The heat dissipation performance of the radiator is related to the wind speed blown onto the surface of the radiator by the fan. In the design of the automobile, whether the wind speed on the surface of the radiator meets the requirements is comprehensively considered. When the requirements are met, the uniformity of the radiator meets the performance requirements. Otherwise, when the uniformity of the radiator cannot be met, the heat dissipation problem will be caused. Therefore, the uniformity evaluation needs to be carried out. According to the uniformity result, whether the setting position, direction, angle and the like of the radiator system meet the requirements is judged. If the requirements are not met, the adjustment can be made until the requirements are met. The experimental vehicle and the test in the early development stage have good purposes.

[0028] As shown in Figure 1 , it is a flow chart of a radiator speed uniformity evaluation method of the present application. The uniformity evaluation method comprises,

[0029] Step 1: Calculate the total area A of the outlet of the radiator; the total area A can be calculated by pre-inputting or directly obtained;

[0030] Step 2: Set multiple detection points on the surface of the radiator, and calculate the wind speed at each detection point; the wind speed sensor corresponding to the detection point can detect the wind speed data of each detection point;

[0031] Step 3: Calculate the average speed V of the surface of the radiator based on the wind speed corresponding to the multiple detection points. The average value of the wind speed of each point is obtained by adding the wind speed of each detection point and dividing by the total number of detection points;

[0032] Step 4: Calculate the area A` covered by the detection points in the set speed range; the set speed range is set based on the average speed V. Generally, the speed range V1 is set as V2

[0033] Step 5: Calculate the parameter UI for evaluating the speed uniformity based on A` and A. Whether the uniformity meets the requirements is judged based on the UI value. The parameter UI is the ratio of the area of the set speed range to the total area. That is, the calculation method of the parameter UI for evaluating the speed uniformity is:

[0034] UI=A` / A.

[0035] Step 6: Judge whether the radiator meets the uniformity requirements at this time based on the uniformity parameter UI. When the UI value is greater than the set threshold UI1, it is judged that the uniformity meets the requirements. Otherwise, it is judged that the uniformity does not meet the requirements.

[0036] In the present application, if the heat sink and its setting are judged to be unqualified, the problem can be adjusted directly and then verified again until the uniformity meets the requirements, and then the heat sink at this time can be judged to meet the requirements.

[0037] Step 7: Because the evaluation of uniformity in the present application is to judge the uniformity by the proportion of the area corresponding to the range meeting the requirements to the total area, the corresponding proportion data and the corresponding distribution diagram can be directly output. When the UI value meets the uniformity requirement, the heat sink uniformity distribution diagram is displayed, wherein the distribution diagram is a schematic diagram of the area corresponding to the sampling points with the speed in the set speed range to the total area. As shown in the figure, the area occupied by the sampling points is colored with a certain color, such as gray or other colors, to represent that this part is in the range of 0.6V-1.4V, which can be directly displayed on the image. In this way, the position and range of the area A` occupying the total area A can be displayed, which can directly represent the performance and uniformity of the heat sink whether it meets the requirements. Figure 2

[0038] In the present application, a heat sink speed uniformity evaluation system is also provided, which comprises a collection unit, a calculation unit and a result output unit, wherein:

[0039] The collection unit collects the total area A of the heat sink and the wind speed of each sampling point through a plurality of sampling points arranged on the surface of the heat sink, and the output end is connected to the calculation unit;

[0040] The calculation unit calculates the average speed V of all sampling points and the area A` of the sampling points between V*0.6 and V*1.4, and further calculates the uniformity evaluation parameter UI; the output end of the calculation unit is connected to the result output unit;

[0041] The result output unit is used to output the uniformity evaluation result according to the calculated parameter UI. The evaluation result is based on UI to judge whether the uniformity requirement is met, and the position of the sampling point with the speed between 0.6V and 1.4V on the total surface area of the heat sink can be adjusted according to the center of each sampling point with a certain radius. When the speed of the point is within the threshold value, the area of the circle is colored, and after coloring all the detection points in this way, the corresponding distribution diagram can be obtained, and the angle and position can be adjusted based on the distribution diagram until the uniformity requirement is met.

[0042] The present application has the advantages of A is the total area, A' is the area of ±40% of the average speed V, and the ratio of the acceptable speed area to the total area. The uniformity evaluation parameter is simple and fast to calculate, more intuitive than the traditional method, and the surface speed uniformity distribution can be directly viewed in post-processing. ​

[0043] Obviously, the specific implementation of the present application is not limited by the above-mentioned manner, as long as various non-essential improvements are made by adopting the method concept and technical solutions of the present application, which are within the protection scope of the present application.

Claims

1. A method of evaluating heat sink speed uniformity, characterized by: The application relates to a method for evaluating the uniformity of air velocity distribution of a radiator, comprising the following steps: Step 1: calculating the total area A of the outlet of the radiator; Step 2: setting a plurality of detection points on the surface of the radiator and calculating the air velocity at each detection point; Step 3: calculating the area A' covered by the detection points in a set velocity range; Step 4: calculating a parameter UI for evaluating the uniformity of the air velocity based on A' and A, and judging whether the uniformity meets the requirements based on the value of UI; In step 4, the parameter UI for evaluating the uniformity of the air velocity is calculated as follows: UI=A' / A; When the value of UI is greater than a set threshold UI1, it is judged that the uniformity meets the requirements, otherwise it is judged that the uniformity does not meet the requirements.

2. The method of evaluating heat sink speed uniformity according to claim 1, wherein: The set velocity range in step 3 is set based on the average velocity V.

3. A method of evaluating heat sink speed uniformity according to claim 2, characterized by: The average velocity V is calculated based on the air velocities of the plurality of detection points.

4. A method of evaluating speed uniformity of a heat sink according to claim 2 or 3, characterized by: The set velocity range V1 is set as V2 5. A method of evaluating heat sink speed uniformity according to claim 4, characterized by: V2 and V3 are both preset air velocity values.

6. The method of evaluating heat spreader speed uniformity of claim 1, wherein: V2 and V3 are V*0.6 and V*1.4 respectively.

7. A heat spreader speed uniformity evaluation system characterized by: When the value of UI meets the uniformity requirements, a radiator uniformity distribution diagram is displayed, wherein the distribution diagram is a schematic diagram of the area occupied by the sampling points with the air velocity in the set velocity range. The application further relates to a device for evaluating the uniformity of air velocity distribution of a radiator, comprising a collecting unit, a calculating unit and a result output unit, wherein: The collecting unit collects the total area A of the radiator and the air velocity of each sampling point through a plurality of sampling points arranged on the surface of the radiator, and the output end of the collecting unit is connected to the calculating unit; The calculating unit calculates the average velocity V of all the sampling points and the area A' occupied by the sampling points between V*0.6 and V*1.4, and further calculates the uniformity evaluation parameter UI; the output end of the calculating unit is connected to the result output unit; The result output unit is used for outputting the uniformity evaluation result according to the calculated parameter UI; The evaluation parameter UI for evaluating the uniformity of the air velocity is calculated as follows: UI=A' / A; When the value of UI is greater than a set threshold UI1, it is judged that the uniformity meets the requirements, otherwise it is judged that the uniformity does not meet the requirements.

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