Dual layer flow automotive air conditioner with anti-bleed and method of use

Abstract

The application discloses a double-layer flow automobile air conditioner capable of preventing air channeling and a use method thereof. The double-layer flow automobile air conditioner capable of preventing air channeling comprises an air inlet box body, an air outlet box body and an air channeling prevention assembly. The air inlet box body is provided with a flow separation baffle for separating an internal space into a first channel and a second channel. The air outlet box body is horizontally provided with an air outlet baffle for separating an internal space of the air outlet box body into a first flow channel and a second flow channel. Each channel is provided with a group of air channeling prevention assemblies. The air channeling prevention assembly comprises a fresh air door, a return air door and a door cutoff partition. When the fresh air inlet and the return air inlet are both in an open state, the door cutoff partition can cooperate with the fresh air door to form a partition wall for preventing air convection between the fresh air inlet and the return air inlet. The application realizes air channeling prevention on the basis of double-layer flow, effectively reduces howling noise in the use process of the air conditioner, realizes air channeling prevention when the automobile runs at a high speed, prevents unnecessary air blowing and improves subjective experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile air conditioner manufacturing, in particular to a double-layer flow channel automobile air conditioner with anti-air leakage and a use method thereof. BACKGROUND

[0002] With the increasing demand for energy saving of new energy vehicles, double-layer flow air conditioners are increasingly widely used because the double-layer flow structure can effectively utilize fresh air and return air, and is more energy-saving and environmentally friendly while meeting the functions.

[0003] At the same time, with the increasing requirements of new energy vehicles for noise, comfort and energy saving, anti-air leakage has gradually become a necessary function.

[0004] In the prior art, if the mixed air mode is turned on when the vehicle is running at high speed, air leakage will occur, which will produce noise, and passengers will also subjectively feel unnecessary air blowing. Without the anti-air leakage function, to eliminate air leakage, either the return air is turned off, which will increase energy consumption, or the blower power is increased, which will increase energy consumption and noise, so anti-air leakage has gradually become a necessary function.

[0005] However, in the existing technical solutions, the air conditioners that can realize double-layer flow mainly have the following two forms, and none of them can realize both double-layer flow and anti-air leakage function, as follows:

[0006] One is to realize upper and lower layering by front and rear type, and control the proportion of fresh air and return air in front and rear two parts by air door combination, such as the technologies disclosed in technical documents with publication numbers CN103298632B, CN113056613A and CN111372799A;

[0007] The second is to realize upper and lower layering by left and right type, and control the proportion between fresh air and return air in left and right two parts by bowl-type air door, such as the double-layer flow air inlet mode of Maer BEV-3;

[0008] The third air conditioner places the return air door on the side and places the blower horizontally in the axial direction to prevent air leakage from directly blowing into the passenger cabin.

[0009] The above various double-layer flow structure air conditioners cannot realize complete anti-air leakage function with maximum flow channel utilization rate, and the reasons are as follows:

[0010] The first type of air conditioner that realizes upper and lower layering by front and rear type will cause air leakage when fresh air and return air are needed in the upper layer, i.e. when the fresh air and return air doors are opened at the same time, as long as the critical value of high vehicle speed and low blower speed is exceeded.

[0011] The second type of air conditioner using left and right type to realize up and down layered type, uses a bowl type air door, as long as not 100% fresh air or 100% return air mode, mixed air mode, more than high speed, low critical value of blower speed, will occur wind.

[0012] The third type of air conditioner with side return air type anti-wind function, on the one hand, can not realize complete anti-wind, can only prevent direct blowing; on the other hand, due to the horizontal placement of the blower shaft, the layered airflow is always arranged front and back, and the double-layer flow mode cannot enter the distribution box, so that the air conditioner of this type cannot realize the double-layer flow structure.

[0013] Therefore, how to solve the defects of the prior art that the double-layer flow or anti-wind air conditioner cannot realize both functions at the same time has become a technical solution that technicians in the field need to solve. SUMMARY

[0014] In view of the above defects of the prior art, the present application provides an anti-wind double-layer flow automobile air conditioner and its use method, which realizes the function of double-layer flow under the premise of anti-wind.

[0015] To achieve the above purpose, on the one hand, the present application discloses an anti-wind double-layer flow automobile air conditioner, comprising:

[0016] The air inlet box body is internally provided with a flow separation plate, which separates the internal space of the air inlet box body into a first channel for the side close to the vehicle and a second channel for the other side close to the vehicle and the bottom, and the top of the air inlet box body is provided with an air inlet, and one side close to the first channel is provided with an air outlet;

[0017] The air outlet box body is arranged in the air inlet box body, and a horizontal air outlet partition plate is arranged in the air outlet box body, which separates the air outlet box body into a first flow channel and a second flow channel, and the top and bottom of the air outlet box body are respectively provided with a first flow passage communicated with the first flow channel and a second flow passage communicated with the second flow channel, and the air outlet box body and the air inlet box body share the same air outlet;

[0018] The first impeller and the second impeller are respectively arranged in the first flow channel and the second flow channel, the first impeller and the second impeller each include a plurality of blades uniformly distributed around the driving shaft thereof, and the first impeller, the second impeller, the first flow passage and the second flow passage are coaxially arranged;

[0019] The air inlet of each channel includes a fresh air inlet and a return air inlet;

[0020] Each of the channels is provided with a set of anti-air-leakage components, the anti-air-leakage components including a fresh air damper corresponding to the fresh air inlet, a return air damper corresponding to the return air inlet, and a damper cutoff partition, when the fresh air inlet and the return air inlet are both in an open state, the damper cutoff partition can cooperate with the fresh air damper to form a partition wall, for preventing air convection between the fresh air inlet and the return air inlet.

[0021] In some embodiments, the fresh air damper is a bowl-type damper, and the return air damper is a plate-type damper, when the bowl-type damper is in a fully open state and the return air damper is in an open state, one side of the bowl-type damper contacts the damper cutoff partition, and the arc-shaped top surface of the bowl-type damper cooperates with the damper cutoff partition to form a partition wall.

[0022] In some embodiments, the fresh air damper includes a plate-type fresh air damper for opening or closing the fresh air inlet only, and a plate-type partition damper, the return air damper is a plate-type damper, when the plate-type fresh air damper and the return air damper are both in an open state, the plate-type partition damper is in a closed state, and the plate-type partition damper cooperates with the damper cutoff partition to form a partition wall.

[0023] In some embodiments, the anti-air-leakage double-layer flow automobile air conditioner further includes a filter element, at least one of the filter elements is arranged in the air inlet box body and between the anti-air-leakage components and the air outlet box body, and the airflow entering from the air inlet passes through the filter element before entering the air outlet box body.

[0024] In some embodiments, the first impeller and the second impeller are of an integrated structure and share one driving shaft; and / or,

[0025] The blade profiles of the first impeller and the second impeller are opposite; and / or,

[0026] The diameter of the first impeller is less than or equal to the diameter of the second impeller, and the height of the first impeller is greater than or equal to the height of the second impeller.

[0027] In some embodiments, the first channel between the first impeller closer to the air inlet and the air inlet is a straight pipe;

[0028] The second channel between the second impeller farther from the air inlet and the air inlet is in an "L" shape, including a straight pipe located on the side of the first channel and a horizontal pipe located on the side of the second impeller away from the first impeller.

[0029] In some embodiments, each of the fresh air dampers and each of the return air dampers are connected to a rocker arm of a mode disc through a corresponding rocker arm, and are opened or closed according to a fresh air track or a return air track on the mode disc during rotation of the mode disc.

[0030] Advantages:

[0031] The double-flow automobile air conditioner of the application can divide the airflow into two paths, distinguish the flow direction of the airflow, and reduce the longitudinal space occupation by setting the second channel to bypass the air outlet box and enter from the bottom of the air outlet box. The lower layer can be entered by the return air to ensure lower energy consumption for functions such as blowing feet, and the upper layer can be entered by the fresh air to ensure safety and efficiency of functions such as blowing and defrosting. By installing an anti-air-channeling component in each channel to form a partition wall, the fresh air inlet and the return air inlet are isolated from each other, thereby further achieving the effect of preventing air channeling on the basis of double-flow, effectively reducing the howling noise during use of the air conditioner, preventing unnecessary air blowing during high-speed operation of the automobile, and improving the subjective experience.

[0032] In another aspect, the application discloses a use method of the double-flow automobile air conditioner of the application.

[0033] When the automobile only needs external air, the double-flow automobile air conditioner of the application is set to the fresh air mode, the fresh air inlet is opened, and the return air inlet is closed.

[0034] When the automobile only needs internal air, the double-flow automobile air conditioner of the application is set to the return air mode, the fresh air inlet is closed, and the return air inlet is opened.

[0035] When the automobile needs both external air and internal air, the double-flow automobile air conditioner of the application is set to the mixed air mode, the fresh air inlet and the return air inlet are opened, the fresh air damper is adjusted until the damper cutoff is in contact with the partition wall to form a partition wall, and the air convection between the fresh air inlet and the return air inlet is prevented.

[0036] In some embodiments, the fresh air damper is a bowl-shaped damper, the bowl-shaped damper is half-opened in the fresh air mode, and the bowl-shaped damper is fully opened in the mixed air mode; or

[0037] The fresh air damper includes a plate-shaped fresh air damper and a plate-shaped partition damper, the plate-shaped fresh air damper and the plate-shaped partition damper are both fully opened in the fresh air mode, and the plate-shaped fresh air damper is fully opened and the plate-shaped partition damper is closed in the mixed air mode.

[0038] In some embodiments, the method for using the anti-wind-running double-flow automobile air conditioner further comprises:

[0039] When the double flow is needed, the first channel in the anti-wind-running automobile air conditioner is opened to the fresh air mode, and the second channel in the anti-wind-running automobile air conditioner is opened to the return air mode.

[0040] By using the method for using the anti-wind-running double-flow air conditioner, the howling noise during use of the air conditioner can be effectively reduced, the anti-wind-running can be realized during high-speed running of the automobile, the noise can be reduced, the non-required air blowing can be prevented, and the subjective experience is improved.

[0041] The concept, specific structure and generated technical effects of the present application will be further described below with reference to the accompanying drawings, so as to fully understand the purposes, features and effects of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A sectional perspective structure schematic view of one side of the return air door in an embodiment of the present application is shown.

[0043] Figure 2 A sectional perspective structure schematic view of one side of the fresh air door in an embodiment of the present application is shown.

[0044] Figure 3 A top perspective structure schematic view of an embodiment of the present application is shown.

[0045] Figure 4 A structure schematic view of one side of the return air door in an embodiment of the present application is shown.

[0046] Figure 5 A structure schematic view of the return air door and the fresh air door in a fully closed state in an embodiment of the present application is shown.

[0047] Figure 6 A structure schematic view of the first flow channel in a fresh air mode in an embodiment of the present application is shown.

[0048] Figure 7 A structure schematic view of the first flow channel in a return air mode in an embodiment of the present application is shown.

[0049] Figure 8 A structure schematic view of the first flow channel in a mixed air mode in an embodiment of the present application is shown.

[0050] Figure 9 A structure schematic view of the first flow channel in a mixed air mode in another embodiment of the present application is shown.

[0051] Figure 10 A structure schematic view of the mode disc controlling the fresh air door and the return air door through the rocker arm in an embodiment of the present application is shown.

[0052] Figure 11 A structural schematic diagram of a fresh air track of a mode disc in an embodiment of the present application is shown.

[0053] Figure 12 A structural schematic diagram of a return air track of a mode disc in an embodiment of the present application is shown.

[0054] Figure 13 A curve diagram of the relationship between the rotation angle of a mode disc and the opening degree of a fresh air damper and the opening degree of a return air damper in an embodiment of the present application is shown.

[0055] In the diagram:

[0056] 1, air inlet box; 2, air outlet box; 3, filter core; 4, fresh air damper; 5, return air damper; 6, first flow channel; 7, second flow channel; 8, first impeller; 9, second impeller; 10, rocker arm; 11, mode disc; 12, fresh air track; 13, return air track; 14, damper cutoff partition; 15, plate-type fresh air damper; 16, plate-type cutoff damper; 17, shunt partition; 18, first passage; 19, second passage; 20, air outlet partition; 21, air outlet. DETAILED DESCRIPTION

[0057] EMBODIMENT

[0058] As shown in the diagram, a double-layer flow automobile air conditioner of an embodiment for preventing air leakage includes an air inlet box 1, an air outlet box 2, and an air leakage prevention assembly. Figures 1 to 8

[0059] The air inlet box 1 is internally provided with a shunt partition 17, which divides the internal space of the air inlet box 1 into a first passage 18 for the side close to one side of the automobile and a second passage 19 for the side close to the other side of the automobile and the bottom. The top of the air inlet box 1 is provided with an air inlet, and the side close to the first passage is provided with an air outlet 21.

[0060] The one side and the other side of the automobile refer to the left side and the right side of the inside of a left-hand drive automobile, or the right side and the left side of the inside of a right-hand drive automobile.

[0061] The air outlet box 2 is arranged in the air inlet box 1 and is internally horizontally provided with an air outlet partition 20, which divides the inside of the air outlet box 2 into a first flow channel 6 and a second flow channel 7. The top and the bottom of the air outlet box 1 are respectively provided with a first flow passage opening communicating with the first flow channel 6 and a second flow passage opening communicating with the second flow channel 7. The air outlet box 2 and the air inlet box 1 share the same air outlet 21.

[0062] ​The first impeller 8 and the second impeller 9 are respectively arranged in the first flow channel 6 and the second flow channel 7, and the first impeller 8 and the second impeller 9 each include a plurality of blades uniformly distributed around the driving shaft thereof, and the first impeller 8, the second impeller 9, the first flow passage and the second flow passage are coaxially arranged.

[0063] The air inlet corresponding to each channel includes a fresh air inlet and a return air inlet.

[0064] A set of anti-air-leakage components are arranged in each channel, and the anti-air-leakage components include a fresh air damper 4 arranged corresponding to the fresh air inlet, a return air damper 5 arranged corresponding to the return air inlet, and a damper cutoff partition 14, when the fresh air inlet and the return air inlet are both in an open state, the damper cutoff partition 14 can cooperate with the fresh air damper to form a partition wall, for preventing air convection between the fresh air inlet and the return air inlet.

[0065] Specifically, the air flow direction in the anti-air-leakage double-flow automobile air conditioner is as follows: the first impeller rotates to suck external air from the air inlet into the first channel 18, and the air flows through the first flow passage into the first flow channel 6, and under the rotation of the first impeller 8, the air flows out of the air outlet; the second impeller 9 rotates to suck external air from the air inlet into the second channel 7, bypasses the side of the air outlet box 2, flows through the second flow passage into the second flow channel 7 from the bottom of the air outlet box 2, and under the rotation of the second impeller 9, the air flows out of the air outlet.

[0066] In actual application scenarios, the air outlet corresponding to the first flow channel 6 is usually connected to the face blowing or defrosting fan of the automobile; and the air outlet corresponding to the second flow channel 7 is usually connected to the foot blowing fan of the automobile.

[0067] The above-mentioned anti-air-leakage double-flow automobile air conditioner can divide the air flow into two paths by separating the air inlet box 1, the air outlet box 2 and the impeller into two parts, which is convenient for distinguishing the flow direction of the air flow, and by arranging the second channel 19 to bypass the air outlet box 2 and enter from the bottom thereof, the longitudinal space occupation is reduced, the return air can enter the lower layer to ensure lower energy consumption to complete the foot blowing function, and the fresh air can enter the upper layer to ensure the safety and efficiency of face blowing and defrosting; meanwhile, by installing the anti-air-leakage components in each channel to form an isolation wall, the fresh air inlet and the return air inlet can be isolated from each other, thereby further realizing the anti-air-leakage effect on the basis of double flow, effectively reducing the howling noise during the use of the air conditioner, preventing air leakage during high-speed operation of the automobile, reducing noise, preventing unnecessary air blowing, and improving the subjective experience.

[0068] In some embodiments, the fresh air damper 4 is a bowl-type damper, and the return air damper 5 is a plate-type damper. Figures 6 to 8 Figures 6 to 8 ​Taking the first channel 18 as an example, the working states of the anti-air leakage assembly in the fresh air mode, the return air mode and the mixed air mode are shown respectively.

[0069] In the fresh air mode, the bowl-type damper is in a half-open state, and the return air damper 5 is in a closed state, so that the air source in the air conditioner is all the air outside the vehicle. Specifically, when the opening degree of the bowl-type damper is 70°±5°, it is in a half-open state. In the return air mode, the bowl-type damper is in a fully closed state, and the return air damper 5 is in an open state, so that the air source in the air conditioner is all the air outside the vehicle. In the mixed air mode, when the bowl-type damper is in a fully open state and the return air damper 5 is in an open state, one side of the bowl-type damper contacts the damper cutoff partition 14, and the arc-shaped top surface of the bowl-type damper and the damper cutoff partition together form a partition wall to prevent the direct exchange of air between the air outside the vehicle and the air inside the vehicle in the air conditioner, thereby preventing air leakage. Specifically, when the opening degree of the bowl-type damper is 89°±5°, it is in a fully open state.

[0070] In other embodiments, referring to FIG. 1, Figure 9 As shown, the fresh air damper 4 includes a plate-type fresh air damper 15 for opening or closing the fresh air inlet only, and a plate-type partition damper 16, and the return air damper 5 is a plate-type damper. When the plate-type fresh air damper 15 and the return air damper 5 are both in an open state, the plate-type partition damper 16 is in a closed state, and the plate-type partition damper 16 and the damper cutoff partition 14 together form a partition wall.

[0071] Further, the anti-air leakage double-layer flow vehicle air conditioner further includes at least one filter element 3 arranged in the air inlet box 1 and between the anti-air leakage assembly and the air outlet box 2. The airflow entering through the air inlet passes through the filter element 3 before entering the air outlet box 2. By using the anti-air leakage double-layer flow vehicle air conditioner of the present application, in the fresh air mode, the filter element 3 arranged in the first channel 18 and the filter element 3 arranged in the second channel 19 are both passed through by fresh air, which can effectively increase the use area of the filter element 3 and improve the return air mode and the mixed air mode.

[0072] In some embodiments, the first impeller 8 and the second impeller 9 are of an integrated structure and share a drive shaft, so as to facilitate the synchronous driving of the first impeller 8 and the second impeller 9 and achieve air volume balance. Further, the blade profiles of the first impeller 8 and the second impeller 9 are opposite, which ensures that the airflow in the first channel 18 enters from the top of the air outlet box 2 and the airflow in the second channel 19 enters from the bottom of the air outlet box 2.

[0073] In some embodiments, the diameter of the first impeller 8 is less than or equal to the diameter of the second impeller 9, and the height of the first impeller 8 is greater than or equal to the height of the second impeller 9. Specifically, the first impeller is designed to have a diameter of 126 mm and a height of 50 mm, and the second impeller is designed to have a diameter of 140 mm and a height of 32 mm. Generally, to adapt to the installation from bottom to top, the diameter of the second impeller is greater than or equal to the diameter of the first impeller; according to the different requirements of air volume, the height ratio of the first impeller to the second impeller is between 1:1 and 2:1.

[0074] In some embodiments, the first channel 18 between the first impeller 8 close to the air inlet and the air inlet is a straight pipe. The second channel 19 between the second impeller 9 far from the air inlet and the air inlet is an "L" shape, including a straight pipe on the side of the first channel 18 and a horizontal pipe on the side of the second impeller 9 away from the first impeller 8.

[0075] As shown in Figures 9 to 12 some embodiments, each fresh air damper 4 and each return air damper 5 is connected to the rocker arm 10 of the mode disc 11 through the corresponding rocker arm 10, and is opened or closed according to the fresh air track 12 or the return air track 13 on the mode disc 11 during the rotation of the mode disc 11. Specifically, as shown in Figure 13 when the rotation angle of the mode disc 11 is 0°, the fresh air damper 4 is half-opened to 70°, and the return air damper 5 is closed, which is the fresh air mode; when the rotation angle of the mode disc 11 is 125°, the fresh air damper 4 is closed, and the return air damper 5 is fully opened to 75°, which is the return air mode; when the rotation angle of the mode disc 11 is 170°, the fresh air damper 4 is fully opened to 89°, and the return air damper 5 is fully opened to 75°, which is the anti-air leakage mode.

[0076] The application also provides a use method of the anti-air leakage double-layer flow automobile air conditioner, which comprises:

[0077] When the automobile only needs external air, the anti-air leakage double-layer flow automobile air conditioner is set to the fresh air mode, the fresh air inlet is opened, and the return air inlet is closed;

[0078] When the automobile only needs internal air, the anti-air leakage double-layer flow automobile air conditioner is set to the return air mode, the fresh air inlet is closed, and the return air inlet is opened;

[0079] When the automobile needs both external air and internal air, the anti-air leakage double-layer flow automobile air conditioner is set to the mixed air mode, the fresh air inlet and the return air inlet are opened, the fresh air damper is adjusted until it contacts the damper stop to form a partition wall for preventing air convection between the fresh air inlet and the return air inlet.

[0080] In some embodiments, the fresh air door is a bowl-type door, in the fresh air mode, the bowl-type door is half open, in the mixed air mode, the bowl-type door is fully open. In other embodiments, the fresh air door includes a plate-type fresh air door and a plate-type partition door, in the fresh air mode, the plate-type fresh air door and the plate-type partition door are both fully open, in the mixed air mode, the plate-type fresh air door is fully open and the plate-type partition door is closed.

[0081] In some embodiments, the method for using the anti-wind-leak double-flow automobile air conditioner further comprises:

[0082] When the double flow is needed, the first channel in the anti-wind-leak automobile air conditioner is opened to the fresh air mode, and the second channel in the anti-wind-leak automobile air conditioner is opened to the return air mode.

[0083] The above detailed description of the preferred embodiments of the present application. It should be understood that those skilled in the art without creative work can make many modifications and changes according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. A double-layer flow automobile air conditioner for preventing air leakage, characterized by comprising: The application relates to an air conditioner, which comprises the following parts: an air inlet box (1) internally provided with a flow separation baffle (17) for separating the internal space of the air inlet box (1) into a first channel (18) near one side of a vehicle and a second channel (19) near the other side of the vehicle and the bottom, and provided with an air inlet on the top and an air outlet (21) on the side near the first channel; an air outlet box (2) arranged in the air inlet box (1) and internally provided with an air outlet baffle (20) for separating the air outlet box (2) into a first flow channel (6) and a second flow channel (7), and provided with a first flow passage communicated with the first flow channel (6) on the top and a second flow passage communicated with the second flow channel (7) on the bottom, and sharing the air outlet (21) with the air inlet box (1); a first impeller (8) and a second impeller (9) arranged in the first flow channel (6) and the second flow channel (7) respectively, wherein the first impeller (8) and the second impeller (9) each comprise a plurality of blades uniformly distributed around a driving shaft, and the first impeller (8), the second impeller (9), the first flow passage and the second flow passage are coaxially arranged; the air inlet of each channel comprises a fresh air inlet and a return air inlet; each channel is provided with a set of anti-air-leakage components, which comprise a fresh air damper (4) arranged corresponding to the fresh air inlet, a return air damper (5) arranged corresponding to the return air inlet and a damper cutoff partition (14), when the fresh air inlet and the return air inlet are both in an open state, the damper cutoff partition (14) can form a partition wall with the fresh air damper to prevent air convection between the fresh air inlet and the return air inlet; the fresh air damper (4) is a bowl-type damper, and the return air damper (5) is a plate-type damper, when the bowl-type damper is in a fully open state and the return air damper (5) is in an open state, one side of the bowl-type damper contacts the damper cutoff partition (14), and the arc-shaped top surface of the bowl-type damper and the damper cutoff partition form a partition wall together; the fresh air damper (4) comprises a plate-type fresh air damper (15) for opening or closing the fresh air inlet only and a plate-type partition damper (16), and the return air damper (5) is a plate-type damper, when the plate-type fresh air damper (15) and the return air damper (5) are both in an open state, the plate-type partition damper (16) is in a closed state, and the plate-type partition damper (16) and the damper cutoff partition (14) form a partition wall together; the first impeller (8) and the second impeller (9) are integrated and share one driving shaft; and / or the blades of the first impeller (8) and the second impeller (9) are opposite in shape; and / or The diameter of the first impeller (8) is less than or equal to the diameter of the second impeller (9), and the height of the first impeller (8) is greater than or equal to the height of the second impeller (9).

2. The cross air flow car air conditioner of claim 1, wherein, The anti-air-leakage double-flow automobile air conditioner further comprises filter elements (3), at least one of which is arranged in the air inlet box (1) and between the anti-air-leakage assembly and the air outlet box (2). The air entering from the air inlet passes through the filter elements (3) before entering the air outlet box (2).

3. The cross air flow car air conditioner of claim 1, wherein, The first channel (18) between the first impeller (8) close to the air inlet and the air inlet is a straight pipe; The second channel (19) between the second impeller (9) far from the air inlet and the air inlet is "L"-shaped, comprising a straight pipe on the side of the first channel (18) and a horizontal pipe on the side of the second impeller (9) away from the first impeller (8).

4. The cross air flow car air conditioner of claim 1, wherein, Each fresh air damper (4) and each return air damper (5) is connected to the rocker arm (10) of the mode disc (11) through a corresponding rocker arm (10), and is opened or closed according to the fresh air track (12) or the return air track (13) on the mode disc (11) during rotation of the mode disc (11).

5. The method of using a dual level flow automotive air conditioner of claim 1, wherein, Comprising: When the automobile only needs external air, the anti-air-leakage double-flow automobile air conditioner is set to the fresh air mode, the fresh air inlet is opened, and the return air inlet is closed; When the automobile only needs internal air, the anti-air-leakage double-flow automobile air conditioner is set to the return air mode, the fresh air inlet is closed, and the return air inlet is opened; When the automobile needs both external air and internal air, the anti-air-leakage double-flow automobile air conditioner is set to the mixed air mode, the fresh air inlet and the return air inlet are opened, the fresh air damper is adjusted until it comes into contact with the damper cutoff to form a cutoff wall for preventing air convection between the fresh air inlet and the return air inlet.

6. The method of using a double-laminar flow air curtain automotive air conditioner of claim 5, wherein, The fresh air damper is a bowl-shaped damper, which is half-opened in the fresh air mode and fully opened in the mixed air mode; or The fresh air damper comprises a plate-shaped fresh air damper and a plate-shaped cutoff damper, which are both fully opened in the fresh air mode and the plate-shaped fresh air damper is fully opened and the plate-shaped cutoff damper is closed in the mixed air mode.

7. A method of using a double-laminar flow air-conditioning system for a vehicle according to claim 5 or 6, wherein Further comprising: When double flow is needed, the first channel in the anti-air-leakage automobile air conditioner is opened to the fresh air mode, and the second channel in the anti-air-leakage automobile air conditioner is opened to the return air mode.

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