Ventilation structure for a vehicle and its heat exchanger

Abstract

The application relates to a ventilation structure of a vehicle and a heat converter thereof, and belongs to the technical field of vehicle manufacturing. The ventilation structure comprises a heat converter, a ventilation grille and a flow guide plate. The heat converter has a heat dissipation core body. The ventilation grille is arranged at intervals with the heat dissipation core body in the X direction, a plurality of openings are arranged on the ventilation grille, and the openings are used for ventilation and heat dissipation of the heat dissipation core body. The flow guide plate is connected to the ventilation grille and the heat converter at two ends in the Y direction, an acute angle between the flow guide plate and the X direction is theta, an opening ratio of the heat converter is lambda, and the lambda and the theta satisfy a certain relationship. The ventilation structure provided by the application can improve the heat dissipation effect of the heat converter of the vehicle, can minimize the occupied space, and can meet the modeling design requirements of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle manufacturing technology, and in particular to a ventilation structure for a vehicle and its heat exchanger. Background Technology

[0002] To cool down the various components inside a vehicle, a heat exchanger is typically installed. This heat exchanger exchanges heat with the internal components using media such as cooling oil or coolant, absorbing the heat generated by these components. Simultaneously, the heat exchanger connects to the outside of the vehicle through a ventilation grille, expelling the absorbed heat. Some vehicle models, to enhance heat dissipation, have the length of the ventilation grille greater than the overall length of the heat exchanger. In this case, to ensure that all air intakes from the ventilation grille reach the heat exchanger, a deflector can be added between the ventilation grille and the heat exchanger, guiding the air intake from the ventilation grille to the heat exchanger.

[0003] However, since the air deflector is generally set at an angle, if the angle between the air deflector and the X-direction (the length direction of the vehicle body) is too large, the length of the ventilation grille will be longer, and the space occupied by the air deflector and the ventilation grille will be larger. This is not conducive to the structural design of the vehicle body to meet the vehicle styling requirements. If the angle between the air deflector and the X-direction (the length direction of the vehicle body) is too small, the length of the ventilation grille will be too small, and the heat dissipation performance of the ventilation grille will be insufficient. Summary of the Invention

[0004] This application provides a ventilation structure for a vehicle and its heat exchanger to solve the technical problem that existing deflectors and ventilation grilles cannot simultaneously improve the heat dissipation effect of the heat exchanger and reduce its space occupation.

[0005] According to one aspect of this application, a ventilation structure for a vehicle heat exchanger is provided. The ventilation structure includes a heat exchanger, a ventilation grille, and a deflector. The heat exchanger has a heat dissipation core. The ventilation grille is spaced apart from the heat dissipation core in the X-direction and has a plurality of openings for ventilation and heat dissipation of the heat dissipation core. The deflector is connected to the ventilation grille and the heat exchanger at its two ends in the Y-direction, respectively. The acute angle between the deflector and the X-direction is θ, and the opening ratio of the heat exchanger is λ, wherein λ and θ satisfy the following formula:

[0006] λ={Ai+[0.9402*exp(-0.02859θ)+0.06599]Ao} / Ar*100%;

[0007] Wherein, Ar is the orthographic projection area of ​​the heat dissipation core on the YZ plane, Ai is the effective area of ​​the overlapping portion of the orthographic projections of all the openings of the ventilation grille on the YZ plane and the orthographic projection of the heat dissipation core on the YZ plane, and Ao is the area of ​​the overlapping portion of the orthographic projections of all the openings of the ventilation grille on the YZ plane and the orthographic projection of the guide plate on the YZ plane.

[0008] The ventilation structure of the vehicle heat exchanger provided in this application includes a heat exchanger, a ventilation grille, and a deflector. The deflector connects the heat exchanger and the ventilation grille, guiding the air intake at the opening of the ventilation grille to the heat exchanger for ventilation and cooling. Furthermore, the acute angle θ between the deflector and the X-direction is θ, and the relationship between θ and the opening ratio λ of the heat exchanger satisfies the formula λ={Ai+[0.9402*exp(-0.02859θ)+0.06599]Ao} / Ar*100%, where Ar, Ai, and Ao are related to the structural design of the heat exchanger's heat dissipation core, the ventilation grille, and the deflector. Therefore, through the structural design of this application, as long as the angle θ between the heat exchanger's heat dissipation core, the ventilation grille, and the deflector satisfies the above relationship, and the resulting opening ratio λ meets the heat dissipation requirements of the heat exchanger, the angle θ can be minimized while still satisfying the heat dissipation effect of the vehicle heat exchanger. This reduces the length of the ventilation grille, thereby reducing the space occupied by the ventilation grille and the deflector, which is beneficial for meeting the vehicle body's styling design requirements. Therefore, this application provides a ventilation structure that can both improve the heat dissipation effect of the vehicle's heat exchanger and meet the vehicle's styling requirements.

[0009] In a further preferred embodiment, the ventilation grille extends beyond the heat dissipation core at both ends in the Y direction. Extending the ventilation grille beyond the heat dissipation core at both ends allows for uniform airflow into the heat dissipation core through openings near its ends, thereby improving heat dissipation efficiency. This approach minimizes the space occupied by the ventilation grille while ensuring efficient heat dissipation.

[0010] In a further preferred embodiment, the width of the ventilation grille in the Z-direction is smaller than the width of the heat exchanger in the Z-direction. In this embodiment, the heat dissipation requirements of the vehicle's heat exchanger can be met by controlling the length of the ventilation grille in the Y-direction and the angle between the deflector and the X-direction. Furthermore, the width of the ventilation grille in the Z-direction can be reduced, making it smaller than the width of the heat exchanger in the Z-direction. This facilitates vehicle styling design and enhances the vehicle's aesthetics.

[0011] In a further preferred embodiment, the guide plate is arranged parallel to the Z-direction, which helps to guide the air intake at the opening of the ventilation grille to the surface of the heat exchanger, so that the ventilation grille can uniformly intake air along the Z-direction, thereby improving the heat dissipation efficiency of the heat exchanger.

[0012] In a further preferred embodiment, the ventilation structure further includes a license plate plate, which is positioned in the X-direction on the side of the ventilation grille away from the heat dissipation core and covers the corresponding portion of the ventilation grille. In this embodiment, the corresponding portion of the ventilation grille does not have an opening; that is, the corresponding portion of the ventilation grille is a solid structure, to facilitate the secure installation of the license plate plate onto the corresponding portion of the ventilation grille.

[0013] In a further preferred embodiment, the number of the guide plates is at least two, and the at least two guide plates include a first guide plate and a second guide plate. The first guide plate and the second guide plate are respectively disposed on both sides of the heat exchanger in the Y direction, and the first guide plate and the second guide plate are arranged in a mirror symmetrical manner. At this time, Ao is the area of ​​the overlapping portion of the orthographic projection of all the openings of the ventilation grille on the YZ plane and the orthographic projection of the first guide plate and the second guide plate on the YZ plane.

[0014] In this design, multiple guide vanes are placed between the ventilation grille and the heat exchanger to further guide the airflow from the openings of the ventilation grille to the heat exchanger, thereby improving the heat dissipation efficiency of the heat exchanger. Furthermore, the first and second guide vanes are respectively positioned on both sides of the heat exchanger along the Y-direction and are mirror-symmetrically arranged. Therefore, the acute angle θ between the first and second guide vanes and the X-direction is the same, ensuring that the airflow at the first and second guide vanes is identical, which is beneficial for uniform heat dissipation of the heat exchanger. Here, Ao is the area of ​​the overlapping portion of the orthographic projections of all openings of the ventilation grille onto the YZ plane and the orthographic projections of the first and second guide vanes onto the YZ plane. The angle between the first and second guide vanes and the X-direction can then be determined simultaneously using the relationship between the opening ratio λ and θ, which is beneficial for the structural design of the first guide vane, the second guide vane, and the ventilation grille.

[0015] In a further preferred embodiment, both the first and second guide plates are arranged parallel to the Z-direction, and they are arranged in a figure-eight shape. Connecting the first and second guide plates to both sides of the heat exchanger along the Y-direction and arranging them in a figure-eight shape helps to concentrate the air intake at the ventilation grille onto the surface of the heat exchanger, thereby improving the heat dissipation efficiency of the heat exchanger.

[0016] In a further preferred embodiment, the ventilation grille includes a first grille and a second grille, both of which are provided with the opening. The first grille and the second grille are spaced apart in the Z direction, and the first grille is connected to the first guide plate and the second guide plate in the Y direction.

[0017] In this design, a first grille and a second grille are spaced apart in the Z-direction. By simultaneously supplying air to the heat exchanger through the first and second grilles, the heat dissipation efficiency of the heat exchanger can be improved. Furthermore, a first guide plate and a second guide plate are respectively installed at both ends of the first grille. The first guide plate and the second guide plate can increase the air volume supplied by the first grille to the heat exchanger, which is beneficial to further improving the heat dissipation efficiency.

[0018] In a further preferred embodiment, the acute angle between the first guide plate and the second guide plate and the X direction is θ. In this case, Ai is the area of ​​the overlapping portion of the orthographic projection of all the openings on the first grille and all the openings on the second grille on the YZ plane and the orthographic projection of the heat dissipation core on the YZ plane.

[0019] In this design, a first guide vane and a second guide vane are respectively installed on both sides of the first grille, while no guide vanes are installed at either end of the second grille. Therefore, when determining Ao, only the orthographic projection area of ​​the first and second guide vanes on both sides of the first grille on the YZ plane needs to be considered. That is, Ao is the area of ​​the overlapping portion of the orthographic projections of all openings of the first grille on the YZ plane and the orthographic projections of the first and second guide vanes on the YZ plane. This improves the accuracy of Ao, thereby making the relationship between the acute angle θ between the guide vane and the X direction and the opening ratio λ of the heat exchanger more precise, so as to facilitate the structural design of the ventilation grille and guide vanes based on the relationship between θ and λ.

[0020] According to another aspect of this application, a vehicle is provided, including the ventilation structure of the aforementioned vehicle heat exchanger. The vehicle provided by this application, due to the presence of the aforementioned ventilation structure, can both meet the vehicle's heat dissipation requirements and minimize the space occupied by the ventilation grille and deflector, thereby satisfying vehicle styling requirements.

[0021] In summary, the ventilation structure of the vehicle and its heat exchanger provided in this application has at least the following beneficial effects:

[0022] According to the ventilation structure of the vehicle and its heat exchanger provided in this application, when the acute angle θ between the deflector and the X-direction and the opening ratio λ of the heat exchanger satisfy the relationship λ={Ai+[0.9402*exp(-0.02859θ)+0.06599]Ao} / Ar*100%, the heat dissipation requirements of the vehicle's heat exchanger can be met by controlling the opening ratio λ of the heat exchanger to be greater than a certain value. Based on this, as long as the above formula holds, the ventilation structure can be designed reasonably to avoid occupying excessive space by considering the dimensions and installation relationship of the heat exchanger's heat dissipation core, ventilation grille, and deflector. In this case, the vehicle can meet both styling design requirements and heat dissipation requirements, thus solving the technical problem that existing deflectors and ventilation grilles cannot simultaneously improve the heat dissipation effect of the heat exchanger and reduce space occupation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0024] Figure 1 A front view schematic diagram of the ventilation structure of a vehicle heat exchanger provided in an embodiment of this application;

[0025] Figure 2 This is a front view of the heat exchanger provided in an embodiment of this application;

[0026] Figure 3 This is an orthographic projection view of the ventilation structure provided in the embodiments of this application on the XY plane;

[0027] Figure 4 An orthographic projection view of the ventilation structure provided in the embodiments of this application on the YZ plane; and

[0028] Figure 5 This is a schematic diagram of the area of ​​each part of the ventilation structure provided in the embodiment of this application on the YZ plane.

[0029] The attached figures are labeled as follows:

[0030] 110. Heat exchanger; 111. Heat sink core;

[0031] 120. Ventilation grille; 121. First grille; 122. Second grille; 123. Second grille;

[0032] 131. First deflector; 132. Second deflector;

[0033] 140. License plate. Detailed Implementation

[0034] In the description of this application, it should be understood that the use of terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" to indicate orientation or positional relationship, unless otherwise specified, is understood to be based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can be a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] It should be noted that, for ease of understanding, this document describes in detail the specific structure of the ventilation structure of the vehicle and its heat exchanger using a spatial rectangular coordinate system XYZ. When the vehicle is normally traveling on the road, the X-axis refers to the length of the vehicle, the Y-axis to the width, and the Z-axis to the height. In this document, when describing positional relationships, the directions referred to by "X-axis," "Y-axis," and "Z-axis" should be in accordance with the above definitions and should not be understood as any other direction, which will not be elaborated upon further.

[0039] The vehicle provided according to the embodiments of this application can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Specifically, the vehicle of this application includes a ventilation structure for ventilating and cooling the vehicle's heat exchanger. Because the vehicle of this application adopts this ventilation structure, its structural design, based on the ventilation structure itself, can both meet the vehicle's heat dissipation requirements and minimize the space occupied by the ventilation structure, thus facilitating vehicle styling requirements.

[0040] Figure 1 A front view schematic diagram of the ventilation structure of a vehicle heat exchanger provided in an embodiment of this application; Figure 2 This is a front view of the heat exchanger provided in an embodiment of this application; Figure 3 This is an orthographic projection view of the ventilation structure provided in the embodiments of this application on the XY plane; Figure 4 An orthographic projection view of the ventilation structure provided in the embodiments of this application on the YZ plane; and Figure 5 This is a schematic diagram of the area of ​​each part of the ventilation structure provided in the embodiment of this application on the YZ plane.

[0041] Please refer to Figure 1-5 The ventilation structure of the vehicle heat exchanger provided in this application embodiment includes at least a heat exchanger 110, a ventilation grille 120, and a deflector.

[0042] The heat exchanger 110 has a heat dissipation core 111. The heat dissipation core 111 has a flow channel for the circulation of cooling media such as cooling oil and cooling water. The cooling media can absorb the heat of various components inside the vehicle and exchange heat with the outside of the vehicle through the ventilation grille 120, thereby dissipating heat and cooling the various components inside the vehicle.

[0043] The ventilation grille 120 is spaced apart from the heat dissipation core 111 in the X-direction. The ventilation grille 120 forms part of the outer surface of the vehicle body, while the heat dissipation core 111 is located inside the vehicle body. The ventilation grille 120 has several openings that connect the external environment of the vehicle body and the interior space of the vehicle body, for ventilation and heat dissipation between the heat dissipation core 111 and the external environment of the vehicle body.

[0044] The two ends of the deflector in the Y direction are connected to the ventilation grille 120 and the heat exchanger 110 respectively. The deflector is used to gather the air intake from the opening of the ventilation grille 120 to the heat dissipation core 111 of the heat exchanger 110, which is beneficial to the precise cooling of the heat dissipation core 111.

[0045] The acute angle between the guide vane and the X-direction is θ, and the opening ratio of the heat exchanger 110 is λ, and λ and θ satisfy the following equation:

[0046] λ={Ai+[0.9402*exp(-0.02859θ)+0.06599]Ao} / Ar*100% (1)

[0047] Where Ar is the orthographic projection area of ​​the heat sink 111 on the YZ plane; Ai is the effective area of ​​the overlapping portion of the orthographic projections of all openings of the ventilation grille 120 on the YZ plane and the orthographic projection of the heat sink 111 on the YZ plane; Ao is the area of ​​the overlapping portion of the overlapping portion of the orthographic projections of all openings of the ventilation grille 120 on the YZ plane and the orthographic projection of the guide plate on the YZ plane; the YZ plane is the plane enclosed by the Y and Z directions.

[0048] The opening ratio λ of the heat exchanger 110 is the ratio of the effective ventilation area of ​​the opening on the ventilation grille 120 to the frontal airflow area of ​​the heat exchanger 110. Generally speaking, the larger the opening ratio λ of the heat exchanger 110, the better the heat dissipation effect. However, due to factors such as vehicle styling, it is difficult to make the opening ratio λ very large.

[0049] Since the acute angle θ between the deflector and the X direction satisfies Equation (1) with the opening ratio λ of the heat exchanger 110, and Ar, Ai, and Ao in Equation (1) are related to the structural design of the heat dissipation core 111 of the heat exchanger 110, the ventilation grille 120, and the deflector, the structural design of this embodiment ensures that the angle θ between the heat dissipation core 111 of the heat exchanger 110, the ventilation grille 120, and the deflector satisfies the above relationship, and the resulting opening ratio λ satisfies the heat dissipation requirements of the heat exchanger 110. This allows for minimizing the angle θ while ensuring the heat dissipation effect of the vehicle's heat exchanger 110, thereby reducing the length of the ventilation grille 120 and the space occupied by the ventilation grille 120 and the deflector, which is beneficial for meeting the vehicle's styling requirements. Furthermore, Equation (1) can be used to preliminarily determine whether the heat dissipation performance of a newly developed vehicle model meets the requirements, and by comparing the opening ratio data of other models, it can provide a design basis for the styling design of the new vehicle.

[0050] As a further preferred embodiment, based on the above-mentioned solution, the specific embodiments of this application may also include one or more of the following additions or combinations.

[0051] In some optional embodiments, the surface of the heat dissipation core 111 of the heat exchanger 110 is perpendicular to the X direction, that is, the heat dissipation core 111 is set facing the front of the vehicle. As a result, the driving wind generated when the vehicle is driving can directly reach the heat dissipation core 111 through the opening on the ventilation grille 120, which is beneficial to improving the heat dissipation effect of the heat dissipation core 111 of the heat exchanger 110.

[0052] In some alternative embodiments, the heat exchanger 110 can be a device that exchanges heat for in-vehicle components, such as a radiator, condenser, or intercooler.

[0053] In some optional embodiments, the ventilation grille 120 protrudes beyond the heat dissipation core 111 at both ends in the Y direction, and the length of the ventilation grille 120 in the Y direction is greater than the length of the heat dissipation core 111 in the Y direction. The ventilation grille 120 can uniformly intake air towards the heat dissipation core 111 through its openings near its two ends in the Y direction, thereby maximizing the heat dissipation efficiency of the heat dissipation core 111 while meeting vehicle styling requirements.

[0054] In some alternative embodiments, the width of the ventilation grille 120 in the Z direction is smaller than the width of the heat exchanger 110 in the Z direction. Since the heat dissipation requirements of the vehicle heat exchanger 110 can be met by controlling the length of the ventilation grille 120 in the Y direction and the angle between the deflector and the X direction when conforming to equation (1), the width of the ventilation grille 120 in the Z direction can be appropriately reduced to match the vehicle's styling requirements, making the vehicle's appearance more aesthetically pleasing.

[0055] In some alternative embodiments, the deflector is arranged parallel to the Z-direction, which helps to guide the air intake at the opening of the ventilation grille 120 to the surface of the heat exchanger 110, so that the ventilation grille 120 can uniformly intake air along the Z-direction, thereby improving the heat dissipation efficiency of the heat exchanger 110.

[0056] In some optional embodiments, the ventilation structure further includes a license plate 140, which is disposed in the X-direction on the side of the ventilation grille 120 away from the heat dissipation core 111 and covers the corresponding portion of the ventilation grille 120. Since the corresponding portion of the ventilation grille 120 used for connection with the license plate 140 is blocked by the license plate 140 and cannot be used for heat dissipation, no opening is provided in this corresponding portion. Accordingly, when calculating the ventilation area of ​​the ventilation grille 120, the portion blocked by the license plate 140 need not be considered. This allows for a more accurate relationship between the acute angle θ between the guide vane and the X-direction and the opening ratio λ of the heat exchanger 110, facilitating the structural design of the ventilation grille 120 and the guide vane based on the relationship between θ and λ.

[0057] In some optional embodiments, the number of guide vanes is at least two, and all guide vanes are respectively arranged on both sides of the heat exchanger 110 along the Y direction. By using multiple guide vanes, the air intake at the opening of the ventilation grille 120 can be more fully guided to the heat exchanger 110, thereby improving the heat dissipation efficiency of the heat exchanger 110.

[0058] In some optional embodiments, the ventilation grille 120 includes a first grille 121 and a second grille 122, which are spaced apart in the Z-direction. The first grille 121 and the second grille 122 are arranged sequentially from top to bottom along the Z-direction, and both the first grille 121 and the second grille 122 are provided with openings. By simultaneously supplying air to the heat exchanger 110 through the first grille 121 and the second grille 122, the heat dissipation efficiency of the heat exchanger 110 can be improved.

[0059] In some optional embodiments, the ventilation grille 120 further includes a third grille 123 with an opening. The third grille 123, the first grille 121, and the second grille 122 are arranged sequentially from top to bottom along the Z direction, which can further improve the heat dissipation efficiency of the heat exchanger 110.

[0060] In some optional embodiments, the ventilation structure includes two guide vanes, namely a first guide vane 131 and a second guide vane 132. The first guide vane 131 and the second guide vane 132 are respectively disposed on both sides of the first grille 121 in the Y direction, while the second grille 122 and the third grille 123 do not have guide vanes on their sides in the Y direction. By connecting the two ends of the first grille 121 in the Y direction to the first guide vane 131 and the second guide vane 132 respectively, the air volume supplied by the first grille 121 to the heat exchanger 110 can be increased through the first guide vane 131 and the second guide vane 132, which is beneficial to improving heat dissipation efficiency.

[0061] Furthermore, since the first guide plate 131 and the second guide plate 132 are arranged in a mirror-symmetric manner, the first guide plate 131 and the second guide plate 132 have the same angle with the X direction, making the air intake at the first guide plate 131 and the air intake at the second guide plate 132 the same, which is beneficial for uniform heat dissipation of the heat exchanger 110. Moreover, the angle between the first guide plate 131 and the second guide plate 132 and the X direction can be determined simultaneously by equation (1), which is beneficial for the structural design of the first guide plate 131, the second guide plate 132 and the ventilation grille 120.

[0062] In some optional embodiments, the first guide plate 131 and the second guide plate 132 are both arranged parallel to the Z direction, and the first guide plate 131 and the second guide plate 132 are arranged to form a figure-eight structure.

[0063] Reference Figure 3A first guide plate 131 is connected to the heat exchanger 110 and the ventilation grille 120 on the left side along the Y direction, and a second guide plate 132 is connected to the heat exchanger 110 and the ventilation grille 120 on the right side along the Y direction. The first guide plate 131 and the second guide plate 132 are arranged in a V-shape, so that the first guide plate 131, the heat exchanger 110, the second guide plate 132, and the ventilation grille 120 form a roughly trapezoidal structure, and this trapezoidal structure gradually tapers from the ventilation grille 120 toward the heat exchanger 110. Therefore, the trapezoidal structure can concentrate the air intake at the ventilation grille 120 to the heat exchanger 110, which helps to improve the heat dissipation efficiency of the heat exchanger 110.

[0064] In some optional embodiments, the acute angle between the first guide plate 131 and the second guide plate 132 and the X-direction is θ. In this case, Ai is the area of ​​the overlapping portion of the orthographic projection of all openings on the first grille 121, the second grille 122, and the third grille 123 onto the YZ plane and the orthographic projection of the heat sink core 111 onto the YZ plane. For ease of understanding, Ai is defined as Ai = Ai a +Ai b +Ai c Ai a Ai is the area of ​​the overlapping portion of the orthographic projection of all openings on the first grille 121 onto the YZ plane and the orthographic projection of the heat sink core 111 onto the YZ plane. b Ai is the area of ​​the overlapping portion of the orthographic projection of all openings on the second grille 122 onto the YZ plane and the orthographic projection of the heat sink core 111 onto the YZ plane. c The area of ​​the overlapping portion of the orthographic projection of all openings on the third grille 123 onto the YZ plane and the orthographic projection of the heat sink core 111 onto the YZ plane.

[0065] In addition, since the second grille 122 and the third grille 123 do not have guide plates at both ends in the Y direction, when determining Ao, it is only necessary to consider the orthogonal projection area of ​​the first guide plate 131 and the second guide plate 132 on both sides of the first grille 121 on the YZ plane. That is, Ao is the area of ​​the overlapping part of the orthogonal projection of all openings of the first grille 121 on the YZ plane and the orthogonal projection of the first guide plate 131 and the second guide plate 132 on the YZ plane.

[0066] For example, refer to Figure 5 Ai = Ai a +Ai b +Ai c Ai a The area of ​​the overlapping portion of the orthographic projection of all openings on the first grille 121 onto the YZ plane and the orthographic projection of the heat sink core 111 onto the YZ plane is the sum of the areas of all openings in region A2 of the figure; Ai bThe area of ​​the overlapping portion of the orthographic projection of all openings on the second grille 122 onto the YZ plane and the orthographic projection of the heat sink core 111 onto the YZ plane is the sum of the areas of all openings within region A5+A6 in the figure; Ai c Ao is the area of ​​the overlapping portion of the orthographic projections of all openings on the third grille 123 onto the YZ plane and the orthographic projection of the heat sink core 111 onto the YZ plane, which is also the sum of the areas of all openings in region A1 in the figure. Ao is the area of ​​the overlapping portion of the overlapping portion of the orthographic projections of all openings on the first grille 121 onto the YZ plane and the orthographic projections of the first guide plate 131 and the second guide plate 132 onto the YZ plane, which is also the sum of the areas of all openings in region A3+A4 in the figure.

[0067] In some optional embodiments, when the ventilation structure also includes other components disposed in front of the ventilation grille 120 and obstructing the ventilation grille 120, the orthogonal projection area of ​​the portion of the ventilation grille 120 obstructed by the other components on the YZ plane should be subtracted when determining Ai, thereby improving the accuracy of Ai.

[0068] In some optional embodiments, when calculating Ar, Ai, and Ao, the digital models of the radiator, ventilation grille 120, license plate plate 140, and air deflector are first assembled onto the vehicle in CATIA software. The air deflector is projected onto a top-view plane to calculate the acute angle θ between the air deflector and the X-direction. The boundary lines of the digital models of the radiator, ventilation grille 120, license plate plate 140, and air deflector are then projected onto a front-view plane to distinguish Ar, Ai, and Ao. (Refer to...) Figure 2 The heat sink 111 of the heat exchanger 110 has a frontal airflow area of ​​Ar, which is calculated to be 232666.64 mm². 2 . Reference Figure 5 The effective ventilation area Ai of the ventilation grille 120 is the sum of the areas of all openings within the area of ​​A1 + A2 + A5 + A6, and the calculated area is 64003.46 mm². 2 The ventilation area Ao of the ventilation grille 120 at the guide plate is the sum of the areas of all openings within the area of ​​A3 + A4, and the calculated area is 13180.00 mm². 2 . Reference Figure 3 The angle θ between the first guide vane 131 and the second guide vane 132 and the X direction is calculated to be 32.26°. Substituting the values ​​of Ar, Ai, Ao, and θ into equation (1), we get λ = 30%, which can meet the heat dissipation requirements of the vehicle model, that is, meet the requirements of the ventilation structure in this embodiment.

[0069] Therefore, the ventilation structure provided in this embodiment can ensure heat dissipation performance, and by reasonably designing the size and installation relationship of the heat dissipation core 111, ventilation grille 120 and deflector of the heat exchanger 110, the ventilation structure will not occupy too much space. At this time, the vehicle can meet both the styling design requirements and the heat dissipation requirements, thereby solving the technical problem that the existing deflector and ventilation grille 120 are difficult to simultaneously improve the heat dissipation effect of the heat exchanger 110 and reduce the space occupied.

[0070] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A ventilation structure of a vehicle heat exchanger, characterized by, The ventilation structure comprises a heat converter, a ventilation grid and a flow guide plate. The heat converter has a heat dissipation core; The ventilation grid is arranged in the X direction and spaced apart from the heat dissipation core, and a plurality of openings are arranged on the ventilation grid, which are used for ventilation and heat dissipation of the heat dissipation core. The flow guide plate is connected to the ventilation grid and the heat converter at both ends in the Y direction, and the acute angle between the flow guide plate and the X direction is θ, and the opening ratio of the heat converter is λ, and λ and θ satisfy the following formula: λ={Ai+[0.9402*exp(-0.02859θ)+0.06599]Ao} / Ar*100%; Wherein, Ar is the projection area of the heat dissipation core in the YZ plane, Ai is the effective area of the overlapping part of the projection of all openings of the ventilation grid in the YZ plane and the projection of the heat dissipation core in the YZ plane, and Ao is the area of the overlapping part of the projection of all openings of the ventilation grid in the YZ plane and the projection of the flow guide plate in the YZ plane; The opening ratio λ of the heat converter is the ratio of the effective ventilation area of the opening on the ventilation grid to the front wind area of the heat converter.

2. The vent structure of a vehicle heat exchanger according to claim 1, wherein The two ends of the ventilation grid in the Y direction protrude from the two ends of the heat dissipation core in the Y direction.

3. The vent structure of a vehicle heat exchanger according to claim 1, wherein The width of the ventilation grid in the Z direction is less than the width of the heat converter in the Z direction.

4. The vent structure of a vehicle heat exchanger according to claim 1, wherein The flow guide plate is arranged parallel to the Z direction.

5. The vent structure of a vehicle heat exchanger according to claim 1, wherein The ventilation structure further comprises a number plate, which is arranged on the side of the ventilation grid away from the heat dissipation core in the X direction and covers the corresponding part of the ventilation grid.

6. The vent structure of a vehicle heat exchanger according to claim 1, wherein The number of flow guide plates is at least two, and the at least two flow guide plates comprise a first flow guide plate and a second flow guide plate, the first flow guide plate and the second flow guide plate are arranged on both sides of the heat converter in the Y direction, and the first flow guide plate and the second flow guide plate are arranged in mirror symmetry. At this time, Ao is the area of the overlapping part of the projection of all openings of the ventilation grid in the YZ plane and the projection of the first flow guide plate and the second flow guide plate in the YZ plane.

7. The vent structure of a vehicle heat exchanger according to claim 6, wherein The first flow guide plate and the second flow guide plate are arranged in a splayed structure.

8. The vent structure of a vehicle heat exchanger according to claim 6, wherein The ventilation grid comprises a first grid and a second grid, and the first grid and the second grid are provided with openings, the first grid and the second grid are arranged in the Z direction, and the first grid is connected to the first flow guide plate and the second flow guide plate in the Y direction.

9. The vent structure of a vehicle heat converter according to claim 8, wherein The acute angle between the first flow guide plate and the second flow guide plate and the X direction is θ, and at this time, Ai is the area of the overlapping part of the projection of all openings on the first grid and the second grid in the YZ plane and the projection of the heat dissipation core in the YZ plane.

10. A vehicle characterized by comprising: The ventilation structure of the vehicle heat converter comprises the vehicle heat converter according to any one of claims 1-9.

Images