An air supply system of an automobile air conditioner, an automobile air conditioner and an automobile

Abstract

This invention provides an air supply system for an automotive air conditioning system, an automotive air conditioner, and an automotive vehicle. The air supply system includes a return air duct and an evaporator fan disposed at the outlet side of the return air duct. A return air inlet component is provided between the evaporator fan and the return air duct. The return air inlet component includes a return air duct forming a fresh air inlet and a sub-return air inlet, wherein: the sub-return air inlet is provided with an air outlet switching component, which is used to switch the sub-return air inlet between the return air duct and the external environment; the fresh air inlet is provided with an air valve for opening and closing the fresh air inlet.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and more particularly to an air supply system for automotive air conditioning, an automotive air conditioner, and an automotive vehicle. Background Technology

[0002] Currently known modes of transmission for the novel coronavirus include close-range droplet transmission, physical contact transmission, aerosol transmission in enclosed spaces, and fecal-oral transmission. The high density of people and the enclosed nature of buses create ideal conditions for aerosol transmission of this virus, posing a significant risk of airborne transmission to passengers. Conventional roof-mounted bus air conditioners connect to the interior of the vehicle via vents at the bottom. The supply and return air ducts are typically located in the upper part of the vehicle, including multiple air outlets and one return air vent. The air supply method is: air is supplied from the upper sides and returned to the center. The air circulates within the passenger compartment, passing through multiple seating areas before entering the roof return air vent. This mixing of airflow throughout the vehicle significantly increases the risk of cross-infection. Summary of the Invention

[0003] In view of this, the present invention provides an air supply system for automotive air conditioning, an automotive air conditioner, and an automotive vehicle to solve the above-mentioned problems, specifically:

[0004] The first aspect of this invention discloses an air supply system for an automotive air conditioning system, including a return air duct and an evaporator fan disposed at the outlet side of the return air duct, wherein a return air inlet component is provided between the evaporator fan and the return air duct.

[0005] The return air inlet component includes a return air duct forming a fresh air inlet and a sub-return air inlet, wherein:

[0006] The sub-return air inlet is equipped with an air outlet switching component, which is used to switch the sub-return air inlet between the return air duct and the external environment.

[0007] The fresh air inlet is equipped with an air valve for opening and closing the fresh air inlet.

[0008] Further optional:

[0009] The return air duct adopts a "T" shaped structure, including a main return air duct and a sub-return air duct connected to one end of the main return air duct in the middle of the duct. The sub-return air duct includes a first sub-return air inlet and a second sub-return air inlet located at both ends of the sub-return air duct.

[0010] Accordingly, the return air duct includes a first return air duct and a second return air duct, wherein the first sub-return air outlet is selectively connected to the first return air duct or the external environment; and the second sub-return air outlet is selectively connected to the second return air duct or the external environment.

[0011] Further optional:

[0012] The first sub-return air vent, disposed at the first end of the sub-return air vent duct, includes: a first opening formed at the first end of the sub-return air vent duct and a second opening disposed on the side wall of the return air vent duct near the first end of the return air duct, wherein the first opening communicates with the external environment; and the second opening communicates with the outlet of the return air duct.

[0013] The second sub-return air vent is located at the second end of the sub-return air vent duct and has the same structure as the first sub-return air vent.

[0014] The air outlet switching component includes a piston and a stop block disposed at the sub-return air outlet, wherein the piston adjusts the stop block to slide between a first position corresponding to the first outlet and a second position corresponding to the second outlet, so as to switch the sub-return air outlet between the return air duct and the external environment.

[0015] Further optional:

[0016] It also includes an air supply duct; and an evaporation chamber and a condensation chamber disposed between the air supply duct and the evaporator fan, wherein the evaporation chamber and the condensation chamber are arranged in upper and lower layers.

[0017] The evaporation chamber is located on the upper layer. The inlet of the evaporation chamber is connected to the outlet of the evaporation fan. The outlet of the evaporation chamber is used to connect to the air supply duct. An evaporator is installed inside the evaporation chamber.

[0018] The condensation chamber is located on the lower layer, and a condenser is installed inside the condensation chamber. A condensing fan is installed on one side wall of the condensation chamber.

[0019] A second aspect of the present invention discloses an automotive air conditioner, wherein the automotive air conditioner employs the air supply system of any of the above-described automotive air conditioning systems.

[0020] Further optional:

[0021] The vehicle has a cabin with one or more rows or columns of seats. The cabin also includes an air supply duct and a return air duct.

[0022] The air supply duct is located above the cabin seats, and the air supply duct has air supply sub-vents corresponding to one or a row or multiple rows or multiple rows of seats, wherein a partition plate is provided between two adjacent air supply sub-vents.

[0023] The return air duct is located below the cabin seats, and the return air duct has return air vents corresponding to one or a row or multiple rows or multiple rows of seats.

[0024] The supply air duct and return air duct form an upward-outward and downward-returning air distribution pattern through the supply air duct sub-vents, partitions, and return air duct sub-vents. This air distribution pattern allows each seat, row, or column to receive an independent downward airflow within a predetermined range.

[0025] Further optional:

[0026] The automotive air conditioner further includes an exhaust fan disposed between the return air duct and the sub-return air inlet, used to exhaust air in the return air duct to the external environment or the return air duct through the sub-return air inlet.

[0027] Further optional:

[0028] The automotive air conditioner also includes an exhaust fan, wherein the exhaust fan is disposed in the return air duct and corresponds one-to-one with the air outlet of the return air duct.

[0029] Further optional:

[0030] The air supply duct outlets are arranged downwards; the air return duct outlets are arranged upwards, wherein the air supply duct outlets and the air return duct outlets correspond one-to-one.

[0031] Further optional:

[0032] The automotive air conditioner also includes a fresh air duct connected to the fresh air inlet; and a fresh air handling module disposed between the evaporator fan and the fresh air duct.

[0033] The fresh air treatment module is used to filter and disinfect the air before it enters the evaporator fan.

[0034] Further optional:

[0035] The fresh air treatment module includes a filter and a sterilization module.

[0036] The filter screen is disposed between the fresh air duct and the evaporator fan for filtering the air;

[0037] The sterilization module is located between the filter and the evaporator fan and is used to sterilize the filtered air.

[0038] Further optional:

[0039] The automotive air conditioner also includes an exhaust air treatment module for disinfecting the air output through the return air duct.

[0040] The waste air treatment module is located between the outlet of the return air duct and the sub-return air inlet.

[0041] A third aspect of the present invention discloses an automobile that employs any of the above-described automobile air conditioners.

[0042] Further optional:

[0043] The car air conditioner is a rear-mounted type, wherein the evaporator and condenser chambers of the car air conditioner are located at the rear of the car, the air supply duct extends from the rear of the car to the front of the car, and the return air duct extends from the rear of the car to the front of the car.

[0044] Beneficial effects:

[0045] This invention improves the return air vent component of the air conditioner, enabling the air conditioner to switch between internal recirculation return air and external recirculation exhaust air. By combining the air duct layout and the distribution of air vent positions in the air conditioning system, and by adding baffles, it achieves a zoned and localized air supply method, so that fresh air or treated air is directly discharged after passing through only one person's breathing zone, and the airflow mixing path in the vehicle is cut off, reducing the risk of virus-laden air exhaled by patients being inhaled by fellow passengers. Attached Figure Description

[0046] The above and other objects, features, and advantages of this disclosure will become more apparent from the detailed description of exemplary embodiments with reference to the accompanying drawings. The drawings described below are merely some embodiments of this disclosure, and those skilled in the art will be able to obtain other drawings based on these drawings without any inventive effort.

[0047] Figure 1 A schematic diagram (I) of the return air inlet component in an air supply system according to an embodiment of the present invention is shown;

[0048] Figure 2 A schematic diagram (II) of the return air inlet component in an air supply system according to an embodiment of the present invention is shown;

[0049] Figure 3 A schematic diagram (III) of the return air inlet component in an air supply system according to an embodiment of the present invention is shown;

[0050] Figure 4 A schematic diagram of an air supply system with a return air duct according to an embodiment of the present invention is shown;

[0051] Figure 5 This diagram illustrates the inner loop of an embodiment of the present invention.

[0052] Figure 6 This diagram illustrates the outer circulation of an embodiment of the present invention.

[0053] Figure 7 This diagram illustrates the airflow direction inside a vehicle according to an embodiment of the present invention. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0056] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0057] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0058] Currently, the airflow organization inside bus air conditioning systems is chaotic and intertwined, with only a single return air vent. If someone carries an infectious virus, the airflow between seats cannot be cut off, making it impossible to reduce cross-infection. This invention addresses this by adding return air ducts on both sides of the lower part of the passenger compartment and creating sub-vents for these ducts based on the seating arrangement. This allows clean air to be delivered from the upper ducts, pass through the passenger area, and return directly to the nearest sub-vent, completing independent circulation between passenger seats. Furthermore, by adding partitions between each row of seats, the airflow between the front and rear is blocked. Finally, by adding fresh air vent valves to the return air ducts and changing the position of the exhaust vent baffles, a completely fresh air system is created, improving the quality of the circulating air inside the vehicle.

[0059] To further illustrate the technical solution of the present invention, the following is combined with... Figure 1-7 As shown, the following specific embodiments are provided.

[0060] Example 1

[0061] This embodiment provides an air supply system for an automotive air conditioning system, including a return air duct 6 and an evaporator fan disposed at the outlet side of the return air duct 6. A return air inlet component is provided between the evaporator fan and the return air duct 6. The return air inlet component includes a return air duct forming a fresh air inlet 3 and a sub-return air inlet. The sub-return air inlet is equipped with an air outlet switching component 5, which is used to switch the sub-return air inlet between the return air duct 6 and the external environment. The fresh air inlet 3 is equipped with an air valve for opening and closing the fresh air inlet 3. Adding a return air inlet component to the automotive air conditioning system can change the gas delivery path in the return air duct, that is, to realize the internal circulation and utilization of air in the return air duct or direct external exhaust. Preferably, the evaporator fan is a centrifugal fan.

[0062] In some alternative configurations, the return air duct includes a main return air duct 1 and a sub-return air duct 2, wherein one end of the main return air duct 1 is connected to the sub-return air duct 2. When using a symmetrical arrangement of sub-return air ducts, it is preferable that the return air duct adopts a "T"-shaped structure, with one end of the main return air duct connected to the middle of the sub-return air duct 2, forming a T-shaped structure. In this case, the sub-return air duct includes a first sub-return air duct 2A and a second sub-return air duct 2B located at both ends of the sub-return air duct 2.

[0063] Correspondingly, the return air ducts are also symmetrically arranged, including a first return air duct and a second return air duct, wherein the first sub-return air outlet is selectively connected to the first return air duct or the external environment; the second sub-return air outlet is selectively connected to the second return air duct or the external environment.

[0064] The first sub-return air vent 2A is located at the first end of the sub-return air duct 2, including a first opening 21 at the first end of the sub-return air duct 2 and a second opening 22 located on the side wall of the return air duct near the first end of the return air duct, wherein: the first opening 21 connects to the external environment; the second opening 22 connects to the outlet of the return air duct. The second sub-return air vent 2B is located at the second end of the sub-return air duct 2, has the same structure as the first sub-return air vent, and the two are arranged symmetrically.

[0065] The air outlet switching component 5 includes a piston and a stop block located at the sub-return air outlet. The piston adjusts the stop block between a first position and a second position to switch the sub-return air outlet between the return air duct and the external environment. The first position corresponds to the first opening, and the second position corresponds to the second opening. Specifically: when the stop block is slid to the first opening, the connection with the external environment is closed, and the air in the return air duct is discharged into the return air outlet duct through the second opening, and finally enters the evaporation chamber through the evaporator fan inlet; when the stop block is slid to the front of the second opening (the side closer to the inside of the return air outlet duct), the path from the return air duct to the return air outlet duct is closed, and the corresponding first opening is opened, connecting the return air duct with the external environment.

[0066] In some alternative configurations, the automotive air conditioning system further includes: an air duct; and an evaporation chamber and a condensation chamber disposed between the air duct and the evaporator fan. The evaporation chamber and condensation chamber are arranged in upper and lower layers. The evaporation chamber is located in the upper layer, with its inlet connected to the outlet of the evaporator fan and its outlet connected to the air duct; the evaporation chamber contains an evaporator. The condensation chamber is located in the lower layer, containing a condenser, and a condenser fan is also located on one side wall of the condensation chamber.

[0067] The air supply system of this car air conditioner, after the addition of the return air vent component, can be converted into a 100% fresh air system by changing the position of the return air vent component block and combining it with the air valve of the fresh air inlet 3, to achieve external circulation and improve the air quality inside the vehicle; or the air valve of the fresh air inlet 3 can be closed and the position of the block can be switched to adjust the return air of the return air duct to achieve internal circulation.

[0068] Example 2

[0069] This embodiment provides an automotive air conditioner, which can use any of the air supply systems described in Embodiment 1.

[0070] In a vehicle using this air conditioner: the vehicle has a cabin with one or more rows or columns of seats. An air supply duct and a return air duct 6 are installed in the cabin. The air supply duct is located above the seats and has sub-vents corresponding to one or more rows or columns of seats, with a partition between adjacent sub-vents. The return air duct 6 is located below the seats and has sub-vents corresponding to one or more rows or columns of seats.

[0071] The supply air duct and return air duct 6 form an upward and downward air distribution pattern through the supply air duct outlets, partitions and return air duct outlets, so that each seat or each row or column can obtain an independent downward airflow within a predetermined range.

[0072] It is understandable that a car's cabin has a certain amount of space, with a ceiling above, a floor below, and a central area for people to move around or sit. In this embodiment, the air supply duct is located between the car's ceiling and the cabin's top, with the air supply duct's sub-vents allowing air to enter the cabin through the ceiling. The return air duct is located between the cabin's bottom and the floor, with the return air duct's sub-vents allowing air to enter the cabin through the floor. It should be noted that the aforementioned "one row, one column, or multiple rows or columns of seats" refers to seats arranged sequentially from the front to the rear of the vehicle, with rows being horizontal and columns being vertical.

[0073] By improving the return air duct 6 and opening return air duct sub-vents according to the distribution of seats in the vehicle, clean air is delivered from the air supply duct, passes through the passenger area, and returns directly to the nearest return air duct sub-vent, completing a relatively independent circulation. The air circulation paths between seats do not mix or mix very little. Furthermore, by adding partitions between each row of seats to block the front and rear airflow paths, the independence of the circulation is further guaranteed.

[0074] Furthermore, the car air conditioner also includes an exhaust fan located between the return air duct 6 and the sub-return air vent, used to exhaust air from the return air duct to the external environment or the return air duct itself. The addition of the exhaust fan allows for faster and smoother airflow, preventing air mixing during circulation and reducing the risk of cross-contamination between seats, thus improving passenger safety. The exhaust fan can also be located outside the first vent, operating only during external air circulation, creating negative pressure within the return air duct to draw away interior air, ensuring rapid and smooth airflow during external air circulation.

[0075] Furthermore, the car air conditioner also includes an exhaust fan. Preferably, the exhaust fan is positioned within the return air duct and corresponds one-to-one with the return air vents. Utilizing the return air vents within the vehicle to arrange the exhaust fan effectively generates negative pressure, ensuring a single airflow path from supply to exhaust within the vehicle, preventing cross-flow of air.

[0076] The supply air duct vents face downwards; the return air duct vents face upwards. Each supply air duct vent corresponds to a return air duct vent. This correspondence ensures that the air circulating between each set of vents flows smoothly and efficiently, while also meeting the passengers' needs for cooling, heating, or fresh air supply.

[0077] In this embodiment, the automotive air conditioner further includes a fresh air duct connected to the fresh air inlet 3; and a fresh air treatment module disposed between the evaporator and the fresh air duct, wherein the fresh air treatment module is used to filter and disinfect the air before it enters the evaporator. Optionally, the fresh air treatment module includes a filter and a sterilization module. The filter is disposed between the fresh air duct and the evaporator to filter the air; the sterilization module is disposed between the filter and the evaporator to sterilize the filtered air.

[0078] In some optional configurations, the automotive air conditioner also includes an exhaust air treatment module. This module disinfects the air output through the return air duct, and is located between the return air duct outlet and the sub-return air inlet. This module ensures that the air exhausted into the atmosphere is also sterilized, preventing bacteria and viruses from polluting the external environment.

[0079] It should be noted that the independent airflow in this embodiment refers to the flow paths formed between air vents with minimal mutual influence. This is in contrast to the easily mixed and intertwined flow between existing air conditioning supply and return vents, and is not strictly independent. The supply and return air vents work together to create airflow surrounding each seat, row, or section of seats, preventing air diffusion within the cabin environment.

[0080] The automotive air conditioner described in this embodiment can also be applied to other air conditioners besides those in Embodiment 1. That is, when the air conditioner is connected to a supply air duct, a return air duct, and a fresh air duct, and the air conditioner can achieve internal circulation between the supply air duct and the return air duct based on a three-way or other air duct switching component, or achieve external circulation such as drawing in fresh air through the fresh air duct, delivering air through the supply air duct, and finally exhausting air through the return air duct, it can be applied.

[0081] Example 3

[0082] This embodiment provides a vehicle that uses any of the vehicle air conditioners described in Embodiment 2. Preferably, the vehicle air conditioner is rear-mounted, wherein the evaporator and condenser chambers of the vehicle air conditioner are both located at the rear of the vehicle, the air supply duct extends from the rear to the front of the vehicle, and the return air duct extends from the rear to the front of the vehicle. The return air vent component of the vehicle air conditioning system is improved to adopt a symmetrical "T"-shaped structure, with a first sub-return air vent 2A and a second sub-return air vent 2B. In this case, the air supply ducts are arranged corresponding to the left and right sides of the vehicle, including a left air supply duct and a right air supply duct; the return air ducts are also arranged left and right, including a left return air duct and a right return air duct.

[0083] The left air supply duct is connected to the upper left outlet 4A of the evaporator cavity, and the right air supply duct is connected to the upper right outlet 4B of the evaporator cavity; the first sub-return air inlet is connected to the left return air duct, and the second sub-return air inlet is connected to the right return air duct.

[0084] Specifically: When a car adopts a rear-mounted integrated air conditioner, the air conditioner is placed at the rear of the vehicle. The upper structure is designed as an evaporator chamber, and the lower structure is a condenser chamber. The evaporator fan uses a large-diameter, high-static-pressure centrifugal fan, which creates negative pressure in the evaporator chamber to draw back air from the return air duct. The air conditioner has air outlets on the top (upper left and upper right outlets) and sub-return air vents on the front side. The air outlets supply air, which flows through the supply air duct and the sub-vents to the vehicle interior. Air inside the vehicle flows through the return air duct sub-vents, the return air duct, the exhaust air treatment module, the exhaust fan, and the sub-return air duct before reaching the return air duct or the external environment. Additionally, the exhaust fan can also be located outside the first outlet, operating only during external air circulation, creating negative pressure in the return air duct to draw away interior air, ensuring rapid and smooth airflow during external air circulation.

[0085] In this embodiment, at least one return air vent is provided under each seat, and airflow paths between each row of seats are blocked by partitions. Figure 7 As shown, during the operation of the air conditioning, it can form a relatively independent airflow path inside the vehicle, avoiding cross-flow.

[0086] The air conditioning system in this invention has two circulation modes.

[0087] Mode 1: Internal circulation mode. In this mode, the damper of the fresh air inlet 3 in the "T"-shaped return air duct is closed, the baffle is at the outermost edge of the "T"-shaped duct, and the return airflow direction is as follows: Figure 5 As shown, the airflow distribution inside the vehicle is as follows: the air conditioning vents blow out through the air supply ducts on the top of the vehicle, are guided by baffles, pass through the passenger seating area, and return directly to the nearest return air duct vent. After being processed by the air handling module, the air is effectively purified and integrated, and then recycled to the evaporator fan for the next round of air circulation. The entire vehicle is divided into sections with localized isolated air supply to reduce the risk of virus-laden air exhaled by patients being inhaled by fellow passengers.

[0088] Mode 2: Fresh air mode, such as Figure 6 As shown, at this time, the air valve at the fresh air inlet of the "T"-shaped return air duct is open. The fresh air inlet valve is controlled and driven by an electric actuator, and the baffle is located on the side of the second inlet closer to the return air duct. At this time, all the air entering the evaporator fan inlet is fresh outdoor air. To ensure pressure balance between the inside and outside of the vehicle, the air inside the vehicle is exhausted outside through the first inlet.

[0089] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. An air supply system for an automotive air conditioning system, comprising a return air duct and an evaporator fan disposed at the outlet side of the return air duct, characterized in that: A return air inlet component is provided between the evaporator fan and the return air duct. The return air inlet component includes a return air duct forming a fresh air inlet and a sub-return air inlet, wherein: The sub-return air inlet is equipped with an air outlet switching component, which is used to switch the sub-return air inlet between the return air duct and the external environment. The fresh air inlet is equipped with an air valve for opening and closing the fresh air inlet; The return air duct includes a main return air duct and a sub-return air duct connected to one end of the main return air duct in the middle of the duct. The sub-return air duct includes a first sub-return air duct and a second sub-return air duct located at both ends of the sub-return air duct. The return air duct includes a first return air duct and a second return air duct. The first sub-return air duct is selectively connected to the first return air duct or the external environment. The second sub-return air duct is selectively connected to the second return air duct or the external environment. The first sub-return air vent, disposed at the first end of the sub-return air vent duct, includes: a first opening opened at the first end of the sub-return air vent duct and a second opening disposed on the side wall of the return air vent duct near the first end of the return air vent duct, wherein the first opening is connected to the external environment; and the second opening is connected to the outlet of the return air duct. The second sub-return air vent is located at the second end of the sub-return air vent duct and has the same structure as the first sub-return air vent. The air outlet switching component includes a piston and a stop block disposed at the sub-return air outlet, wherein the piston adjusts the stop block to slide between a first position corresponding to the first outlet and a second position corresponding to the second outlet, so as to switch the sub-return air outlet between the return air duct and the external environment.

2. The air supply system of the automotive air conditioner according to claim 1, characterized in that: It also includes an air supply duct; and an evaporation chamber and a condensation chamber disposed between the air supply duct and the evaporator fan, wherein the evaporation chamber and the condensation chamber are arranged in upper and lower layers. The evaporation chamber is located on the upper layer. The inlet of the evaporation chamber is connected to the outlet of the evaporation fan. The outlet of the evaporation chamber is used to connect to the air supply duct. An evaporator is installed inside the evaporation chamber. The condensation chamber is located on the lower layer, and a condenser is installed inside the condensation chamber. A condensing fan is installed on one side wall of the condensation chamber.

3. An automotive air conditioner, characterized in that: The automotive air conditioner uses the air supply system of any one of claims 1-2.

4. The automotive air conditioner according to claim 3: The vehicle has a compartment, the compartment having one or more rows or columns of seats, characterized in that: The vehicle cabin is equipped with an air supply duct and an air return duct, wherein: The air supply duct is located above the cabin seats, and the air supply duct has air supply sub-vents corresponding to one or a row or multiple rows or multiple rows of seats, wherein a partition plate is provided between two adjacent air supply sub-vents. The return air duct is located below the cabin seats, and the return air duct has return air vents corresponding to one or a row or multiple rows or multiple rows of seats. The supply air duct and return air duct form an upward-outward and downward-returning air distribution pattern through the supply air duct sub-vents, partitions, and return air duct sub-vents. This air distribution pattern allows each seat, row, or column to receive an independent downward airflow within a predetermined range.

5. The automotive air conditioner according to claim 4, characterized in that: The automotive air conditioner further includes an exhaust fan disposed between the return air duct and the sub-return air inlet, used to exhaust air in the return air duct to the external environment or the return air duct through the sub-return air inlet.

6. The automotive air conditioner according to claim 5, characterized in that: The car air conditioner also includes: an exhaust fan. Wherein: the exhaust fan is installed in the return air duct and corresponds one-to-one with the sub-vents of the return air duct.

7. The automotive air conditioner according to claim 6, characterized in that: The air supply duct outlets are arranged downwards; the return air duct outlets are arranged upwards. The air supply duct outlets and the return air duct outlets are respectively matched one-to-one.

8. The automotive air conditioner according to claim 7, characterized in that: The automotive air conditioner also includes a fresh air duct connected to the fresh air inlet; and a fresh air handling module disposed between the evaporator fan and the fresh air duct. The fresh air treatment module is used to filter and disinfect the air before it enters the evaporator fan.

9. The automotive air conditioner according to claim 8, characterized in that: The fresh air treatment module includes a filter and a sterilization module. The filter screen is disposed between the fresh air duct and the evaporator fan for filtering the air; The sterilization module is located between the filter and the evaporator fan and is used to sterilize the filtered air.

10. The automotive air conditioner according to any one of claims 3-9, characterized in that: The automotive air conditioner also includes an exhaust air treatment module for disinfecting the air output through the return air duct. The waste air treatment module is located between the outlet of the return air duct and the sub-return air inlet.

11. A car, characterized in that: The vehicle uses the vehicle air conditioner as described in any one of claims 3-10.

12. The automobile according to claim 11, characterized in that: The car air conditioner is a rear-mounted type, wherein the evaporator and condenser chambers of the car air conditioner are located at the rear of the car, the air supply duct of the air supply system extends from the rear of the car to the front of the car, and the return air duct extends from the rear of the car to the front of the car.

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