Side air return opening structure for preventing air leakage and automotive air conditioner

Abstract

The present invention discloses a side air return opening structure for preventing air leakage and an automotive air conditioner. The directions of the fresh air passage, the air return passage, and the air outlet passage are not in the same plane. At least two air dampers are provided at the interface between the air return passage and the connecting member. Among them, the air damper for controlling the area far from the fresh air passage side is a bowl-shaped air damper. A bending partition is provided in the range where the area controlled by the bowl-shaped air damper to open and close extends in the connecting member along the air inlet direction. One end of the bending partition is fixed on the side wall of the connecting member facing the fresh air passage, and the other end extends towards the position corresponding to the center of the air outlet passage in the connecting member. The area closed by the bowl-shaped air damper when the corresponding area in the fully opened air return passage is formed between the other end of the bending partition and the interval part between the two air dampers. The present invention can solve the problem of air leakage while not affecting the fresh air and air return functions of the air conditioner, and eliminate the defect of air leakage when the fresh air and air return are opened simultaneously.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air-conditioning manufacturing, and in particular to a side air return port structure for preventing wind from blowing through and an automobile air-conditioning. Background Art

[0002] The automobile air conditioning system (HVAC) is divided into two air intake modes. One is to draw air from the outside of the car to achieve air circulation, which is called external circulation, and the air in it is called fresh air; the other is to draw air from the inside of the car to achieve air circulation, which is called internal circulation, and the air in it is called return air; and there is also a mixed mode, called internal and external circulation.

[0003] like Figure 1 As shown, existing automobile air conditioners generally adopt a configuration in which the fresh air inlet and the return air inlet are located on the same plane. In the external circulation mode, the fresh air damper is opened and the return air damper is closed; in the internal circulation mode, the fresh air damper is closed and the return air damper is opened; in the internal and external circulation mode, the two dampers are opened in a certain ratio.

[0004] The disadvantage of the prior art is that when in the internal and external circulation mode, since the dampers on both sides are in the open state, under certain vehicle operating conditions, such as high vehicle speed and low blower speed, the suction force of the blower cannot suck in all the fresh air, and some air will be blown out through the return air port, causing wind leakage problems.

[0005] Moreover, another problem that comes with wind blowing is noise. Generally, the return air vent of a car air conditioner is relatively close to the co-pilot seat, and the wind blowing in from the fresh air vent will produce relatively obvious wind noise.

[0006] In addition, some models have cross car beams (CROSS CARBEAM), wiring harnesses, airbags and other components arranged close to the return air outlet. When the wind blows through, it will also produce noises such as whistling and roaring, further reducing the riding experience of the co-pilot.

[0007] Therefore, how to solve the problem of air leakage when the fresh air and return air are turned on at the same time has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0008] In view of the problem of air cross-flow occurring when fresh air and return air are turned on at the same time in the automobile air conditioning system in the prior art, the present application provides a side return air vent structure and an automobile air conditioner that prevents air cross-flow.

[0009] To achieve the above-mentioned purpose, the present invention discloses a side return air vent structure for preventing wind leakage, comprising a fresh air duct, a return air duct, an air outlet duct and a connecting component.

[0010] Wherein, the direction of the fresh air channel, the direction of the return air channel and the direction of the air outlet channel are not on the same plane;

[0011] At least two air doors are provided at the interface between the return air channel and the connecting member;

[0012] The at least two air doors jointly control the opening and closing of the return air channel; among them, the air door controlling the area on the side of the return air channel away from the fresh air channel is a bowl-shaped air door;

[0013] A bending partition is provided in the range where the area controlled by the bowl-shaped air door to open and close extends in the connecting member along the air inlet direction;

[0014] The bending partition is a plate structure with a cross-section including a curve, the height direction is perpendicular to the plane formed by the fresh air channel and the return air channel, the first end is fixed on the side wall in the connecting member facing the fresh air channel, and the second end extends towards the position corresponding to the center of the air outlet channel in the connecting member;

[0015] The rotating shaft of the bowl-shaped air door is perpendicular to the plane formed by the fresh air channel and the return air channel;

[0016] A closed area is formed between the second end of the bending partition and the interval part between the two air doors;

[0017] The closed area refers to the area closed when the bowl-shaped air door fully opens the corresponding area in the return air channel.

[0018] The application of the present invention can solve the problem of air leakage while not affecting the fresh air and return air functions of the air conditioner, and eliminate the problem of air leakage that occurs when the fresh air and return air are opened simultaneously in the prior art.

[0019] Preferably, the radius length between the arc-shaped door body of the bowl-shaped air door and the rotating shaft gradually decreases or gradually increases from one side to the other side;

[0020] Shielding structures extending radially away from the rotating shaft are provided on both sides of the arc-shaped door body.

[0021] Preferably, among the at least two air doors, the air door controlling the area on the side of the return air channel close to the fresh air channel is a butterfly-shaped air door.

[0022] Preferably, the number of the air doors is two. Among the two air doors, the area of the return air channel controlled by the bowl-shaped air door on the side away from the fresh air channel accounts for 45% to 55% of the return air channel;

[0023] The other air door controls the remaining area on the side of the return air channel close to the fresh air channel.

[0024] Preferably, the curved partition includes a straight section, a fresh-air direction convex section, and a return-air direction convex section that are sequentially connected from the first end fixed to the side wall of the connection member facing the fresh-air passage to the second end;

[0025] The straight section is perpendicular to the side wall of the connection member;

[0026] The fresh-air direction convex section protrudes toward the fresh-air passage;

[0027] The return-air direction convex section protrudes toward the return-air passage.

[0028] Preferably, the ratio of the fresh-air passage to the return-air passage partitioned by the curved partition is 7:3, and the distance from the straight section to the interface between the return-air passage and the connection member is 1.5 to 4 times the distance from the straight section to the other side wall of the connection member.

[0029] Preferably, the rotating shaft of the bowl-shaped air door is located within the connection member, one end is rotatably connected to the housing of the connection member, and the other end forms a rotary pair with a triangular baffle extending into the connection member from the side wall of the corresponding side of the return-air passage.

[0030] More preferably, a plurality of ventilation openings are provided in the parts of the triangular baffle and the bowl-shaped air door facing the air outlet passage.

[0031] More preferably, the arc-shaped side of the bowl-shaped air door facing the triangular baffle provided with a plurality of ventilation openings is coated with rubber.

[0032] The present invention also provides an automotive air conditioner, including an automotive air conditioner housing and the anti-crosswind side air return port structure described above, and the anti-crosswind side air return port structure is connected to the automotive air conditioner housing.

[0033] The following will further illustrate the concept, specific structure, and technical effects of the present invention with reference to the drawings to fully understand the purpose, features, and effects of the present invention. Description of the Drawings

[0034] Figure 1 Showing a schematic structural diagram of the connection structure of the fresh-air passage, the return-air passage, and the air outlet passage in the prior art.

[0035] Figure 2 Showing a schematic structural diagram of the bowl-shaped air door in the prior art.

[0036] Figure 3 Showing a schematic structural diagram of the connection relationship between the fresh-air passage, the return-air passage, and the air outlet passage in an embodiment of the present invention.

[0037] Figure 4 Showing a schematic structural diagram of the plane perpendicular to the air outlet passage within the connection member in an embodiment of the present invention.

[0038] Figure 5 Shows a schematic structural diagram of a bowl-shaped air damper in an embodiment of the present invention.

[0039] Figure 6 Shows a schematic diagram of the state during the opening and closing process of the bowl-shaped air damper in an embodiment of the present invention.

[0040] Among them, 1. Fresh air channel; 2. Return air channel; 3. Air outlet channel; 4. Connecting member; 5. Bowl-shaped air damper; 6. Butterfly-shaped air damper; 7. Curved partition; 8. Spacing part; 9. Straight section; 10. Protruding section towards fresh air; 11. Protruding section towards return air; 12. Triangular baffle. Detailed implementation manners

[0041] Embodiment

[0042] As Figures 3 to 6 shown, the side return air outlet structure for preventing air leakage includes a fresh air channel 1, a return air channel 2, an air outlet channel 3, and a connecting member 4.

[0043] Among them, the directions of the fresh air channel 1, the return air channel 2, and the air outlet channel 3 are not in the same plane;

[0044] Compared with the prior art, by setting the directions corresponding to the fresh air channel 1, the return air channel 2, and the air outlet channel 3 in different planes respectively, the overall structural design of the side return air outlet structure for preventing air leakage can be more flexible, suitable for different installation environments of the blower, and at the same time, the overall size of the side return air outlet structure after installing the blower can be further reduced, thereby reducing the occupied space.

[0045] In practical applications, a structure in which the angles between the fresh air channel 1 and the return air channel 2, between the fresh air channel 1 and the air outlet channel 3, and between the return air channel 2 and the air outlet channel 3 are all 90 degrees is usually adopted. This structure is more suitable for the three-dimensional space installation environment inside the vehicle, can further improve the neatness of the arrangement inside the vehicle, and is convenient for the manufacturing and forming of the connecting member 4.

[0046] Or, the fresh air channel 1 is set longitudinally, forms a bend angle with the air outlet channel 3 set horizontally, and the return air channel 2 is horizontally connected from one side of the plane formed by the fresh air channel 1 and the air outlet channel 3 to the bend angle position where the fresh air channel 1 and the air outlet channel 3 are connected.

[0047] At least two air dampers are provided at the interface between the return air channel 2 and the connecting member 4;

[0048] At least two air dampers jointly control the opening and closing of the return air channel 2; among them, the air damper for controlling the area on the side of the return air channel 2 far from the fresh air channel 1 is the bowl-shaped air damper 5;

[0049] The area where the bowl-shaped air damper 5 controls opening and closing is provided with a curved partition 7 within the connecting member 4 along the air inlet direction;

[0050] The curved partition 7 is a plate structure with a cross-section including a curve, and its height direction is perpendicular to the plane formed by the fresh air passage 1 and the return air passage 2. The first end is fixed on the side wall of the connecting member 4 facing the fresh air passage 1, and the second end extends towards the position corresponding to the center of the air outlet passage 3 within the connecting member 4;

[0051] The rotating shaft of the bowl-shaped air damper 5 is perpendicular to the plane formed by the fresh air passage 1 and the return air passage 2;

[0052] A closed area is formed between the second end of the curved partition 7 and the interval part 8 between the two air dampers;

[0053] The closed area refers to the area closed by the bowl-shaped air damper 5 when it fully opens the corresponding area within the return air passage 2.

[0054] Specifically, when the bowl-shaped air damper 5 is in the fully open state, one side of the bowl-shaped air damper 5 is in contact with the second end of the curved partition 7.

[0055] In the external circulation mode of the side return air outlet structure of the present invention, the bowl-shaped air damper 5 provided on the side of the return air passage 2 away from the fresh air passage 1 and other air dampers are all in the closed state, that is, the return air passage 2 is closed, so that the air outside the vehicle can flow from the fresh air passage 1 to the air outlet passage 3 to achieve external circulation.

[0056] In the internal circulation mode, the bowl-shaped air damper 5 and other air dampers are all in the open state, that is, the return air passage 2 is fully opened, and at the same time the fresh air passage 1 is closed, so that the air inside the vehicle can flow from the return air passage 2 to the air outlet passage 3 to achieve internal circulation.

[0057] In the internal and external circulation mode, the bowl-shaped air damper 5 is in the open state and the bowl-shaped air damper 5 cooperates with the curved partition 7, and other air dampers are in the closed state, that is, the part of the return air passage 2 controlled by the bowl-shaped air damper 5 is opened, and at the same time the fresh air passage 1 is opened. That is, the air inside the vehicle flows from the return air passage 2 opened by the bowl-shaped air damper 5, and the air outside the vehicle flows from the fresh air passage 1 to the air outlet passage 3 respectively. Then, under the combined action of the bowl-shaped air damper 5 and the curved partition 7, the interior of the connecting member 4 is divided into two parts to enable the air inside and outside the vehicle to have a more accurate flow direction, isolate the air inside and outside the vehicle, and form two spaces where the air circulation inside the vehicle and the air circulation outside the vehicle coexist without affecting each other, effectively solving the problems of air leakage and noise commonly existing in the prior art automotive air conditioners.

[0058] In some more specific embodiments, two dampers are provided at the interface between the return air duct 2 and the connecting member 2, which are a bowl-shaped damper 5 and a butterfly-shaped damper 6. In the external circulation mode, the bowl-shaped damper 5 and the butterfly-shaped damper 6 are both closed; in the internal circulation mode, the bowl-shaped damper 5 and the butterfly-shaped damper 6 are both opened; in the internal and external circulation mode, the bowl-shaped damper 5 is opened and the butterfly-shaped damper 6 is closed.

[0059] In addition, in the internal and external circulation mode, the solutions to the wind and noise problems are as follows: Figure 3 , Figure 4 As shown, in this mode, the butterfly damper 6 at the interface between the return air duct 2 and the connecting member 4 is closed, and only the bowl-shaped damper 5 is opened. At this time, the bowl-shaped damper 5 and the curved partition 7 work together to separate the air inside and outside the vehicle, forming two spaces where an indoor air circulation and an outdoor air circulation coexist without affecting each other, thereby solving the problems of wind blowby and noise.

[0060] It is conceivable that, in some embodiments, the number of the butterfly damper 6 may be more than one, or the butterfly damper 6 may be a damper of other shapes, such as a bowl shape, a bell shape, a plate shape, etc.

[0061] In some embodiments, the radius length between the arc-shaped door body of the bowl-shaped damper 5 and the rotating shaft gradually decreases or increases from one side to the other side;

[0062] Shielding structures extending radially away from the rotating shaft are provided on both sides of the arc-shaped door body.

[0063] In the prior art, Figure 2 As shown, the conventional damper is generally coaxial, that is, the cross section of the conventional bowl-shaped damper is a standard fan-shaped with two sides of equal length. However, since the triangular baffle 12 and the bowl-shaped damper 5 facing the air outlet channel 3 have regular hexagonal openings arranged in a honeycomb shape, the lower bottom edge of the bowl-shaped damper 5 will continuously scrape against the shell, which will cause the arc-shaped side that has been rubber-coated to wear over time and lose its sealing ability.

[0064] To solve the above problems, see Figure 6 The distance from the axis to the edge of the bowl-shaped damper 5 is gradually increased from one side to the other. The radius length between each position of the arc-shaped door body of the bowl-shaped damper 5 and the rotating shaft increases with the increase of the distance between the position and the connecting member 4. During the switching process of the bowl-shaped damper 5, the arc-shaped side that has been rubber-coated will not rub against the shell, thereby solving the problem of sealing failure caused by wear.

[0065] In some embodiments, among the at least two dampers, the damper controlling the area of ​​the return air channel 2 close to the fresh air channel 1 is a butterfly damper 6 .

[0066] In some embodiments, there are two air dampers. Among the two air dampers, the bowl-shaped air damper 5 controls an area on the side of the return air passage 2 away from the fresh air passage 1, which accounts for 45% to 55% of the return air passage 2;

[0067] The other air damper controls the remaining area on the side of the return air passage 2 close to the fresh air passage 1.

[0068] In some embodiments, the curved partition 7 includes a straight section 9, a fresh air direction convex section 10, and a return air direction convex section 11 that are sequentially connected from the first end fixed on the side wall of the connecting member 4 facing the fresh air passage 1 to the second end;

[0069] The straight section 9 is perpendicular to the side wall of the connecting member 4;

[0070] The fresh air direction convex section 10 protrudes towards the fresh air passage 1;

[0071] The return air direction convex section 11 protrudes towards the return air passage 2.

[0072] In some embodiments, a sealing section is further provided on the side of the second end of the curved partition 7 away from the return air direction convex section 11. This sealing section is arranged on the rotation trajectory of the bowl-shaped air damper 5 and plays a role in limiting the bowl-shaped air damper 5.

[0073] The plane formed by the sealing section is parallel to one side of the bowl-shaped air damper 5 when it is in the fully open state, increasing the cooperation degree and fitting area between the bowl-shaped air damper 5 and the second end of the curved partition 7, thereby ensuring that the closed area can further achieve the effect of separating fresh air and return air.

[0074] In some embodiments, the ratio of the fresh air passage 1 to the return air passage 2 partitioned by the curved partition 7 is 7:3, and the distance from the straight section 9 to the interface of the return air passage 2 and the connecting member 4 is 1.5 times to 4 times the distance from the straight section 9 to the other side wall of the connecting member 4.

[0075] In some embodiments, the rotating shaft of the bowl-shaped air damper 5 is located inside the connecting member 4. One end is connected to the housing of the connecting member 4 by a revolute pair, and the other end forms a revolute pair with a triangular baffle 12 extending into the connecting member 4 from the side wall of the corresponding side of the return air passage 2.

[0076] In some embodiments, a number of ventilation openings are provided on the parts of the triangular baffle 12 and the bowl-shaped air damper 5 facing the air outlet passage 3.

[0077] Further, the shape of the ventilation openings is a regular hexagon arranged in a honeycomb shape. Alternatively, the shape of the ventilation openings can be adjusted according to the actual application scenario, and all are within the protection scope of this patent.

[0078] In practical applications, in order to minimize the shielding effect of the triangular baffle 12 and the bowl-shaped air damper 5 on the filter element as much as possible, a number of regular hexagonal openings arranged in a honeycomb pattern are provided in both the triangular baffle 12 and the bowl-shaped air damper 5 to increase the effective air inlet area and minimize the performance loss caused by shielding.

[0079] In some embodiments, refer to Figure 5 , the arc-shaped side of the bowl-shaped air damper 5 facing the triangular baffle 12 with a number of ventilation openings is provided with rubber coating.

[0080] Such as Figure 2 shown, the bowl-shaped air damper in the prior art generally only has rubber coating on the outer sides of the two sides of the bowl-shaped air damper, and relies on the rubber coating on both sides for sealing.

[0081] However, for the part of the triangular baffle 12 and the bowl-shaped air damper 5 facing the air outlet channel 3 where regular hexagonal openings arranged in a honeycomb pattern are opened, the traditional air damper rubber coating is not sufficient to completely seal, so rubber coating treatment is added to the arc-shaped side.

[0082] The present invention also provides an automotive air conditioner, including an automotive air conditioner housing and the above-described side air return opening structure for preventing air leakage, and the above-described side air return opening structure for preventing air leakage is connected to the automotive air conditioner housing.

[0083] The above-mentioned automotive air conditioner can effectively reduce the existing air leakage and noise phenomena, and at the same time has good dimensional flexibility and spatial compactness, and has a wider application scenario.

[0084] 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 labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. Side return air outlet structure for preventing air leakage, including a fresh air passage (1), a return air passage (2), an air outlet passage (3) and a connecting member (4); characterized in that: The directions of the fresh air passage (1), the return air passage (2) and the air outlet passage (3) are not in the same plane; At least two air doors are provided at the interface between the return air passage (2) and the connecting member (4); At least two of the air doors jointly control the opening and closing of the return air passage (2); among them, the air door controlling the area on the side of the return air passage (2) away from the fresh air passage (1) is a bowl-shaped air door (5); A curved partition (7) is provided in the range where the area controlled by the bowl-shaped air door (5) to open and close extends in the connecting member (4) along the air inlet direction; The curved partition (7) is a plate structure with a cross-section including a curve, and the height direction is perpendicular to the plane formed by the fresh air passage (1) and the return air passage (2). The first end is fixed on the side wall in the connecting member (4) facing the fresh air passage (1), and the second end extends towards the position corresponding to the center of the air outlet passage (3) in the connecting member (4); The rotating shaft of the bowl-shaped air door (5) is perpendicular to the plane formed by the fresh air passage (1) and the return air passage (2); A closed area is formed between the second end of the curved partition (7) and the spaced part (8) between the two air doors; The closed area refers to the area closed when the bowl-shaped air door (5) fully opens the corresponding area in the return air passage (2); The curved partition (7) includes a straight section (9), a fresh air direction protruding section (10) and a return air direction protruding section (11) connected in sequence from the first end fixed on the side wall in the connecting member (4) facing the fresh air passage (1) to the second end; The straight section (9) is perpendicular to the side wall of the connecting member (4); The fresh air direction protruding section (10) protrudes towards the fresh air passage (1); The return air direction protruding section (11) protrudes towards the return air passage (2).

2. The side return air outlet structure for preventing air leakage according to claim 1, characterized in that, The radius length between the arc-shaped door body of the bowl-shaped air door (5) and the rotating shaft gradually decreases or gradually increases from one side to the other side; On both sides of the arc-shaped door body, there are shielding structures extending radially away from the rotating shaft.

3. The side return air outlet structure for preventing air leakage according to claim 1, characterized in that, Among at least two of the air doors, the air door controlling the area on the side of the return air passage (2) close to the fresh air passage (1) is a butterfly-shaped air door (6).

4. The side return air outlet structure for preventing air leakage according to claim 1, characterized in that The number of the air doors is two. Among the two air doors, the area of the return air passage (2) controlled by the bowl-shaped air door (5) on the side away from the fresh air passage (1) accounts for 45% to 55% of the return air passage (2); The other air door controls the remaining area on the side of the return air passage (2) close to the fresh air passage (1).

5. The side return air outlet structure for preventing air leakage according to claim 1, characterized in that, The ratio of the fresh air passage (1) partitioned by the curved partition (7) to the return air passage (2) is 7:3, and the distance from the straight section (9) to the interface between the return air passage (2) and the connecting member (4) is 1.5 times to 4 times the distance from the straight section (9) to the other side wall of the connecting member (4).

6. The side return air outlet structure for preventing air leakage according to claim 1, characterized in that, The rotating shaft of the bowl-shaped air damper (5) is located within the connecting member (4), with one end being rotationally connected to the housing of the connecting member (4), and the other end forming a rotational pair with a triangular baffle (12) that extends into the connecting member (4) from the side wall of the corresponding side of the return air passage (2).

7. The side return air outlet structure for preventing air leakage according to claim 6, characterized in that, Both the part of the triangular baffle (12) and the bowl-shaped air damper (5) facing the air outlet passage (3) are provided with a number of ventilation openings.

8. The side return air outlet structure for preventing air leakage according to claim 7, characterized in that, The arc-shaped side of the bowl-shaped air damper (5) facing the triangular baffle (12) provided with a number of ventilation openings is coated with rubber.

9. An automotive air conditioner, characterized in that, It includes an automotive air-conditioning housing and the anti-air-leakage side air return opening structure according to any one of claims 1-8, and the anti-air-leakage side air return opening structure is connected to the automotive air-conditioning housing.

Images