Design Method of Nonlinear Variable Air Damper Adjustment Device for Vehicle Air Conditioner

Abstract

The invention discloses a design method for a non-linear variable air damper regulating device of a vehicle-mounted air conditioner, which comprises the following steps: First, establish a cross coordinate system, and take the rotation center of the track disc as the zero point of the track for controlling the swing of the control rocker; Then, establish the relational expression of the track in the cross coordinate system; Finally, use the "LAW" command in the CATIA software to convert the relational expression of the track into a relational expression about the abscissa and ordinate of any point on the track with α n , that is, the included angle between the track-driven rocker and the abscissa of the coordinate system as the independent variable; Then use the "Space Blend" command in the surface module of the CATIA software to obtain the function curves of the abscissa and ordinate of any point on the track with α n as the independent variable, that is, the track according to α n function expression. The invention adopts a computer-aided design method to design the track disc for driving in a vehicle-mounted air conditioner with non-linear heating, and can design the non-linear regulating device quickly and pertinently.

Description

Technical Field

[0001] The present invention relates to the technical field of computer-aided design, and particularly to a design method for a non-linear variable air door adjusting device of a vehicle-mounted air conditioner. Background Art

[0002] With the continuous improvement of people's requirements for automotive comfort, the requirements for the adjustment method and accuracy of the temperature air door of automotive air conditioners are also getting higher and higher.

[0003] In the prior art, the adjustment methods of multiple temperature air doors include those driven by linkages and those directly connected to motors respectively. This method will increase the cost significantly compared with the linkage drive.

[0004] In practical applications, since new energy vehicles often require multiple heating cores such as heat pumps and PTCs, the air resistance of the hot air flow path increases by about 22%. At this time, the air resistance of the hot air flow path is much larger than that of the cold air flow path.

[0005] If the opening degrees of the cold and hot air doors are adjusted by a conventional linkage drive device to adjust the temperature linearity of the air conditioner, there will be an uneven phenomenon that the temperature rise is very slow in the early stage and very fast in the later stage, and it is difficult to meet the requirements of the vehicle manufacturer for the temperature rise. Although this problem can be solved by the method of directly connecting to the motor, the cost will be very high.

[0006] Therefore, how to solve the problems that the air resistance of the hot air flow path is much larger than that of the cold air flow path and the air conditioner heating is uneven without increasing the cost has become an urgent problem for those skilled in the art. Summary of the Invention

[0007] In view of the above-mentioned defects of the prior art, the present invention provides a design method for a non-linear variable air door adjusting device of a vehicle-mounted air conditioner. The purpose achieved is to adopt a targeted non-linear adjusting device to offset the problems caused by the uneven heating of the actual air conditioner according to the actual working state of the air conditioner.

[0008] To achieve the above object, the present invention discloses a design method for a non-linear variable air door adjusting device of a vehicle-mounted air conditioner. The air door adjusting device includes a rocker arm and a locus disc; the method includes the following steps:

[0009] Step 1: Establish a cross coordinate system, and use the rotation center of the locus disc as the zero point for controlling the locus of the swing of the rocker arm, that is, the coordinates of the cross coordinate system are 0, 0;

[0010] Step 2: Establish the relationship formula of the locus in the cross coordinate system. The specific formula is as follows:

[0011] R 2 =F 2 (t)+G 2 (t);

[0012] F(t) = sqrt((L * cos(α n + A n - 2A n * t) + ΔX)^2 + (L * sin(α n + A n - 2A n * t) + ΔY)^2) * c

[0013] os(atan((L * sin(α n + A n - 2A n * t) + ΔY) / (L * cos(α n + A n - 2A n * t) + ΔX)) + (C / 11 * n) + A n * k n - A n * k n * t);

[0014] G(t) = sqrt((L * cos(α n + A n - 2A n * t) + ΔX)^2 + (L * sin(α n + A n - 2A n * t) + ΔY)^2) * s

[0015] in(atan((L * sin(α n + A n - 2A n * t) + ΔY) / (L * cos(α n + A n - 2A n * t) + ΔX)) + (C / 11 * n) + A n * K n - A n * K n * t);

[0016] Where n = 0, 1, 2, …, 10, corresponding to the positions of the rocker arm at the opening degrees of the hot temperature damper of 0, 10%, 20%, …, 100% respectively;

[0017] L is the length of the rocker arm;

[0018] α n is the included angle of the rocker arm driven by the trajectory relative to the abscissa of the coordinate system;

[0019] A n is the rotation angle of the rocker arm driven by the trajectory in the n + 1 - n state;

[0020] ΔX is the lateral distance of the trajectory driving rocker arm relative to the origin.

[0021] ΔY is the longitudinal distance of the trajectory driving rocker arm relative to the origin.

[0022] C is the total opening degree of the air damper.

[0023] k n is the motion acceleration of the trajectory disk driving rocker arm in the n - n + 1 state, that is, k n =(α n+1 -α n ) / (c / 11);

[0024] t is a real number greater than 0 and less than 1.

[0025] sqrt represents the square root.

[0026] R is the distance between the rotation center of the trajectory disk and the stagnation point of the rocker arm.

[0027] Step 3: Use the "LAW" command in CATIA software to convert the relational expression of the trajectory into a relational expression of the abscissa and ordinate of any point on the trajectory with α n as the independent variable; then use the "Spatial Blend" command in the surface module of CATIA software to obtain the function curves of the abscissa and ordinate of any point on the trajectory with α n as the independent variable, that is, the function expression of the trajectory according to α n .

[0028] Advantages of the present invention:

[0029] The present invention adopts a computer - aided design method to design the trajectory disk for driving in a vehicle air conditioner with non - linear heating, and can design the non - linear regulating device specifically and quickly, and obtain a trajectory disk that meets the requirements quickly without increasing costs.

[0030] The following will further illustrate the concept, specific structure and technical effects generated by the present invention with reference to the drawings, so as to fully understand the purpose, features and effects of the present invention. Description of the Drawings

[0031] Figure 1 Shows the generation process diagram of the trajectory of the control rocker arm on the trajectory disk in an embodiment of the present invention.

[0032] Figure 2 Shows the relationship between any point on the trajectory disk and the zero point of the cross - coordinate system in an embodiment of the present invention. Detailed Embodiment

[0033] Embodiment

[0034] As Figure 1 and Figure 2 shown, a design method for a non - linear variable air damper regulating device for a vehicle air conditioner, the air damper regulating device includes a rocker arm and a track disc; characterized by the following steps:

[0035] Step 1: Establish a cross - coordinate system, and take the rotation center of the track disc as the zero point of the track controlling the swing of the rocker arm, that is, the coordinates of the cross - coordinate system are 0, 0;

[0036] Step 2: Establish the relationship formula of the track in the cross - coordinate system, and the specific formula is as follows:

[0037] R 2 = F 2 (t)+G 2 (t);

[0038] F(t)= sqrt((L * cos(α n + A n - 2A n * t)+ΔX)^2+(L * sin(α n + A n - 2A n * t)+ΔY)^2)* c

[0039] os(atan((L * sin(α n + A n - 2A n * t)+ΔY) / (L * cos(α n + A n - 2A n * t)+ΔX))+(C / 11 * n)+ A n * k n - A n * k n * t);

[0040] G(t)= sqrt((L * cos(α n + A n - 2A n * t)+ΔX)^2+(L * sin(α n + A n - 2A n * t)+ΔY)^2)* s

[0041] in(atan((L * sin(α n + A n - 2A n * t)+ΔY) / (L * cos(α n + A n - 2A n*(t)+ΔX))+(C / 11*n)+A n *K n -A n *K n *t);

[0042] Wherein, n = 0, 1, 2, …, 10, corresponding to the positions of the rocker arm at the opening degrees of the hot temperature air damper of 0, 10%, 20%, …, 100% respectively;

[0043] L is the length of the rocker arm;

[0044] α n is the included angle between the trajectory-driven rocker arm and the abscissa of the coordinate system;

[0045] A n is the rotation angle of the trajectory-driven rocker arm in the state of n + 1 - n;

[0046] ΔX is the lateral distance of the trajectory-driven rocker arm relative to the origin;

[0047] ΔY is the longitudinal distance of the trajectory-driven rocker arm relative to the origin;

[0048] C is the total opening degree of the air damper;

[0049] k n is the motion acceleration of the trajectory disk-driven rocker arm in the state of n - n + 1, that is, k n =(α n+1 -α n ) / (c / 11);

[0050] t is a real number greater than 0 and less than 1;

[0051] sqrt represents the square root;

[0052] R is the distance between the rotation center of the trajectory disk and the stagnation point of the rocker arm;

[0053] Step 3: Use the "LAW" command in the CATIA software to convert the relational expression of the trajectory into a relational expression of the abscissa and ordinate of any point on the trajectory with α n as the independent variable; then use the "Spatial Blend" command in the surface module of the CATIA software to obtain the function curves of the abscissa and ordinate of any point on the trajectory with α n as the independent variable, that is, the function expression of the trajectory according to α n .

[0054] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in this technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art shall fall within the protection scope determined by the claims.

Claims

1. Design method of a non-linear variable air damper regulating device for vehicle air conditioners. The air damper regulating device includes a rocker arm and a track disk; characterized in that, It includes the following steps: Step 1: Establish a cross coordinate system, taking the rotation center of the trajectory disc as the zero point of the trajectory controlling the swing of the rocker arm, that is, the coordinates of the cross coordinate system are 0, 0; Step 2: Establish the relational expression of the trajectory in the cross coordinate system. The specific formula is as follows: R 2 = F 2 (t) + G 2 (t); F(t) = sqrt((L * cos(α n + A n - 2A n * t)+ ΔX)^2+(L * sin(α n + A n - 2A n * t)+ ΔY)^2)* c os(atan((L*sin(α n +A n -2A n *t)+ΔY) / (L*cos(α n +A n -2A n *t)+ΔX))+(C / 11*n)+A n *k n -A n *k n *t); G(t) = sqrt((L * cos(α n + A n - 2A n * t) + ΔX)^2 + (L * sin(α n + A n - 2A n * t) + ΔY)^2) * s in(atan((L*sin(α n +A n -2A n *t)+ΔY) / (L*cos(α n +A n -2A n *t)+ΔX))+(C / 11*n)A n *K n -A n *K n *t); where n = 0, 1, 2, …, 10, corresponding to the positions of the trajectory corresponding to the rocker arm at the opening degrees of the hot temperature air door of 0, 10%, 20%, …, 100% respectively; L is the length of the rocker arm; α n is the included angle of the abscissa of the relative coordinate system of the trajectory-driven rocker arm; A n is the rotation angle of the track driving rocker arm in the n+1 - n state; ΔX is the lateral distance of the trajectory-driven rocker arm relative to the origin; ΔY is the longitudinal distance of the trajectory-driven rocker arm relative to the origin; C is the total opening degree of the air door; k n is the motion acceleration of the track disk driving rocker arm in the n - n + 1 state, i.e., k n =(α n+1 -α n ) / (c / 11); t is a real number greater than 0 and less than 1; sqrt represents the square root; R is the distance between the rotation center of the trajectory disc and the stagnation point of the rocker arm; Step 3: Use the "LAW" command in CATIA software to convert the relational expression of the locus into a relational expression of the abscissa and ordinate of any point on the locus with α n as the independent variable; then use the "Space Blend" command in the surface module of CATIA software to obtain the function curves of the abscissa and ordinate of any point on the locus with α n as the independent variable, that is, the function expression of the locus according to α n .

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