HVAC assembly air mixing device of automobile air conditioning system and automobile with HVAC assembly air mixing device

Abstract

The invention relates to an HVAC assembly air mixing device of an automobile air conditioning system and an automobile comprising the HVAC assembly air mixing device. The HVAC assembly air mixing device comprises a shell, an air mixing cavity, a cold air cavity, a warm air cavity and a control mechanism, and an air blower is arranged on one side of the shell; the air mixing cavity is formed in the shell, and an air mixing assembly is arranged in the air mixing cavity. The cold air cavity is formed in the shell, the air inlet communicates with the air outlet of the air blower, and the air outlet communicates with the air mixing cavity. The warm air cavity is formed in the shell, a cold and hot air door is arranged between an air inlet of the warm air cavity and the cold air cavity, and an air outlet communicates with the air mixing cavity. The control mechanism is connected with the cold and hot air door and used for controlling the angle of the cold and hot air door so that the air inlet of the warm air cavity can be opened or closed and the air outlet of the cold air cavity can be closed or opened. The air mixing cavity, the cold air cavity and the warm air cavity are formed in the shell, the angle of the cold and hot air door is adjusted through the control mechanism, and dynamic matching of the opening degree of the air inlet of the warm air cavity and the closing degree of the air outlet of the cold air cavity is achieved.

Description

Technical Field

[0001] This application relates to the field of automotive air conditioning, and in particular to an HVAC assembly mixing device for an automotive air conditioning system and the same in a vehicle. Background Technology

[0002] The HVAC assembly of an automotive air conditioning system is the core component for regulating the temperature inside the vehicle. It uses a mixing device to adjust the mixing ratio of cold and hot air to achieve the set outlet temperature. Traditional mixing devices typically use a single mixing damper that rotates around an axis within a mixing chamber. By changing its angle, it blocks the openings of the cold air passage (evaporator side) and the hot air passage (heater core side), thereby adjusting the mixing ratio. This traditional single-damper mixing method has the following inherent drawbacks: Low mixing accuracy and large temperature fluctuations: The movement of a single damper has a non-linear relationship with the outlet air temperature. Within the small-angle rotation range of the damper, drastic changes in outlet air temperature are easily caused, resulting in inaccurate temperature control and poor comfort. Airflow disturbance and noise: The intense collision and shearing of cold and hot airflows within the mixing chamber generates significant airflow disturbance and wind noise. Poor mixing uniformity: Cold and hot air are difficult to mix thoroughly in a short time, easily leading to uneven outlet air temperature, resulting in a "hot on the left, cold on the right" phenomenon or localized cold / hot sensations. Poor air conditioning comfort: Due to uneven mixing of cold and hot air, differences in outlet air temperature lead to a poor passenger experience.

[0003] Therefore, there is an urgent need in this field for a new type of air mixing device that can improve the accuracy and uniformity of air mixing and enhance comfort performance. Summary of the Invention

[0004] This application provides an HVAC assembly mixing device for an automotive air conditioning system and the vehicle thereof, which can solve the problems of low mixing accuracy, uneven mixing, high noise, and poor comfort in related technologies.

[0005] In a first aspect, embodiments of this application provide an HVAC assembly mixing device for an automotive air conditioning system, comprising: a housing, a mixing chamber, a cold air chamber, a warm air chamber, and a control mechanism. A blower is disposed on one side of the housing; the mixing chamber is located inside the housing, and a mixing assembly is disposed inside the mixing chamber; the cold air chamber is located inside the housing, and its air inlet is connected to the blower outlet, and its air outlet is connected to the mixing chamber; the warm air chamber is located inside the housing, and a hot and cold air damper is disposed between the warm air chamber inlet and the cold air chamber, and its air outlet is connected to the mixing chamber; the control mechanism is connected to the hot and cold air damper and is used to control the angle of the hot and cold air damper so that the warm air chamber inlet opens or closes, and the cold air chamber outlet closes or opens.

[0006] In conjunction with the first aspect, in one embodiment, the hot and cold air damper has a first angle, a second angle, and a third angle; When the hot and cold air damper is at the first angle, the air inlet of the warm air chamber is closed and the air outlet of the cold air chamber is open; When the hot and cold air damper is at the second angle, the air inlet of the warm air chamber is open and the air outlet of the cold air chamber is closed. When the hot and cold air damper is at the third angle, the air inlet of the warm air chamber opens and the air outlet of the cold air chamber opens.

[0007] In conjunction with the first aspect, in one embodiment, the air mixing device has a pure cooling air mixing mode, a pure heating air mixing mode, and a dual cooling and heating air mixing mode. In the pure cooling mixed air mode, the hot and cold air damper is at the first angle; In the pure hot air mixing mode, the hot and cold air damper is at the second angle; In the hot and cold dual-mixed air mode, the hot and cold air damper is at the third angle.

[0008] In conjunction with the first aspect, in one embodiment, the air mixing assembly includes: a stirring fan blade and a flow equalization net, wherein the stirring fan blade is disposed inside the air mixing chamber; the flow equalization net is disposed inside the air mixing chamber and along the air outlet direction, and the flow equalization net is located downstream of the stirring fan blade.

[0009] In conjunction with the first aspect, in one embodiment, the flow equalization network is provided with hexagonal air outlets evenly distributed.

[0010] In conjunction with the first aspect, in one embodiment, a cooling core is provided inside the cold air cavity, and the cooling core is located at the air inlet of the cold air cavity.

[0011] In conjunction with the first aspect, in one embodiment, a heating core is provided inside the warm air cavity, and the heating core is located at the air inlet of the warm air cavity.

[0012] In conjunction with the first aspect, in one embodiment, the surface of the hot and cold air damper is provided with a guide vane.

[0013] In conjunction with the first aspect, in one embodiment, the surface of the housing is provided with a defrost air outlet and a face blowing air outlet, both of which are connected to the interior of the mixing chamber.

[0014] Secondly, embodiments of this application provide a vehicle, which includes: an HVAC assembly mixing device for an automotive air conditioning system as described above.

[0015] The beneficial effects of the technical solutions provided in this application include: This application provides an HVAC assembly mixing device for an automotive air conditioning system and the corresponding vehicle. By configuring a mixing chamber, a cold air chamber, and a warm air chamber within the housing, and utilizing a control mechanism to adjust the angles of the cold and hot air dampers, dynamic matching is achieved between the opening degree of the warm air chamber inlet and the closing degree of the cold air chamber outlet. This design allows the flow ratio of cold and hot air to be smoothly adjusted as the damper angle changes, avoiding the non-linear relationship between damper movement and outlet air temperature in traditional single-damper mixing methods. This significantly reduces the rate of change in outlet air temperature within the small-angle rotation range of the damper. Simultaneously, cold and hot air enter the mixing chamber separately through damper control, reducing direct airflow collisions and shearing phenomena within the mixing chamber, effectively suppressing airflow disturbances and noise generation, thereby promoting uniform mixing of cold and hot air within the mixing chamber and improving the overall comfort performance of the air conditioning system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the air mixing device provided in the embodiments of this application; Figure 2 A cross-sectional view of the air mixing device provided in an embodiment of this application; Figure 3 A schematic diagram of the stirring fan provided in an embodiment of this application; Figure 4 A schematic diagram of the current sharing network provided in an embodiment of this application; Figure 5 This is a schematic diagram of a pure cooling mixed air mode provided in an embodiment of this application; Figure 6 This is a schematic diagram of a pure heating and air mixing mode provided in an embodiment of this application; Figure 7 This is a schematic diagram of a dual-mode cooling and heating air mixing system provided in an embodiment of this application. Figure 8 A schematic diagram of a hot and cold air damper provided in an embodiment of this application.

[0018] In the diagram: 1. Air inlet structure; 2. Housing; 3. Motor; 4. Defrost air outlet; 5. Surface air outlet; 6. Control mechanism; 7. Heating core; 8. Warm air chamber; 9. Hot and cold air damper; 10. Cold air chamber; 11. Stirring fan blade; 12. Flow equalization net; 13. Cooling core; 14. Blower; 15. Mixing air chamber. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] This application provides an HVAC assembly mixing device for an automotive air conditioning system and the vehicle thereof, which can solve the problems of low mixing accuracy, uneven mixing, high noise, and poor comfort in related technologies.

[0021] See Figures 1 to 8 In a first aspect, embodiments of this application provide an HVAC assembly mixing device for an automotive air conditioning system, comprising: a housing 2, a mixing chamber 15, a cold air chamber 10, a warm air chamber 8, and a control mechanism 6. A blower 14 is disposed on one side of the housing 2; the mixing chamber 15 is opened inside the housing 2, and a mixing component is disposed inside the mixing chamber 15; the cold air chamber 10 is opened inside the housing 2, and its air inlet is connected to the air outlet of the blower 14, and its air outlet is connected to the mixing chamber 15; the warm air chamber 8 is opened inside the housing 2, and a hot and cold air damper 9 is disposed between the air inlet of the warm air chamber 8 and the cold air chamber 10, and its air outlet is connected to the mixing chamber 15; the control mechanism 6 is connected to the hot and cold air damper 9 and is used to control the angle of the hot and cold air damper 9 so that the air inlet of the warm air chamber 8 is opened or closed, and the air outlet of the cold air chamber 10 is closed or opened.

[0022] By setting a mixing chamber 15, a cold air chamber 10, and a warm air chamber 8 inside the housing 2, and using a control mechanism 6 to adjust the angle of the hot and cold air dampers 9, dynamic matching is achieved between the opening degree of the air inlet of the warm air chamber 8 and the closing degree of the air outlet of the cold air chamber 10. This design allows the flow ratio of cold and hot air to be smoothly adjusted with the change of damper angle, avoiding the nonlinear relationship between damper movement and outlet air temperature in traditional single-damper mixing methods. This significantly reduces the rate of change of outlet air temperature within the small-angle rotation range of the damper. At the same time, cold and hot air enter the mixing chamber 15 separately through damper control, reducing direct collision and shearing phenomena of airflow in the mixing chamber 15, effectively suppressing airflow disturbance and noise generation, thereby promoting uniform mixing of cold and hot air in the mixing chamber 15 and improving the overall comfort performance of the air conditioning system.

[0023] In the HVAC assembly mixing unit of an automotive air conditioning system, the housing 2 serves as the basic structure, internally divided into three functional areas: a mixing chamber 15, a cold air chamber 10, and a warm air chamber 8. Furthermore, the surface of the housing 2 is provided with a defrost outlet 4 and a surface air outlet 5, both of which are connected to the interior of the mixing chamber 15. An air inlet structure 1 and a motor 3 are located at one end of the housing 2.

[0024] The air inlet of the cold air chamber 10 is directly connected to the air outlet of the blower 14, ensuring efficient introduction of cold air from the blower 14 and avoiding additional resistance in the airflow duct. The air inlet of the warm air chamber 8 achieves independent control of the warm air flow through the hot and cold air dampers 9. In addition, the hot and cold air dampers 9, as a dual-channel damper adjustment mechanism, dynamically match the opening degree of the air inlet of the warm air chamber 8 with the closing degree of the air outlet of the cold air chamber 10 through angle changes, so that the hot and cold air are proportionally split before entering the mixing chamber 15.

[0025] This dynamic matching mechanism avoids the problem of drastic fluctuations in outlet air temperature caused by slight rotation of the damper in traditional single damper designs. When cold air enters the mixing chamber 15 from the outlet of the cold air chamber 10, it is separated from the path of warm air entering the mixing chamber 15 from the outlet of the warm air chamber 8. This reduces the direct collision and shearing of airflow in the mixing chamber 15 and effectively suppresses initial disturbances and noise generation.

[0026] In this application, the air mixing assembly includes a stirring fan 11 and a flow equalization net 12. The stirring fan 11 is disposed inside the air mixing chamber 15; the flow equalization net 12 is disposed inside the air mixing chamber 15 and is located downstream of the stirring fan 11 along the air outlet direction.

[0027] After entering the mixing chamber 15, the air first enters the area of ​​the stirring fan 11 for mixing. The rotating stirring fan 11 can force the hot and cold air to repeatedly converge and exchange energy in the flow path, forming multiple energy exchange processes and creating a more uniform airflow with a temperature difference.

[0028] The mixed airflow then flows through the flow equalization net 12, which has hexagonal air outlets evenly distributed downstream of the stirring fan 11. The hexagonal structure is based on natural and engineering principles, and its 120-degree angle ensures uniform force distribution: when the airflow passes through, the pressure perpendicular to the channel direction can be effectively dispersed along the honeycomb wall, avoiding stress concentration and ensuring the stability of the thin-walled structure during assembly and operation.

[0029] Meanwhile, the hexagonal structure divides continuous channels with minimal material, achieving high porosity (high proportion of airflow volume). This means that under the same flow area, the hexagonal honeycomb is the lightest and has the least basic obstruction to airflow, thus minimizing pressure drop.

[0030] The obtuse-angled flow channel design makes the airflow separation phenomenon much gentler than that of a square channel, resulting in smaller vortex size and lower energy. The flow channel is closer to an ideal "flow tube", ensuring a uniform wind speed distribution while having relatively low flow resistance.

[0031] In this embodiment, the flow equalization mesh 12 can be made of aluminum alloy and plastic. The aluminum alloy honeycomb flow equalization mesh 12 is typically manufactured using a foil bonding and stretching process, which is low-cost and highly efficient. The plastic honeycomb flow equalization mesh 12 can also be manufactured using a similar co-extrusion and stretching or one-time injection molding process, making it ideal for mass production.

[0032] In practical applications, the structural strength of the flow equalization mesh 12 is sufficient to cope with the normal operating temperature range of automotive air conditioning systems from -20℃ to 50℃. Its reasonable honeycomb channel design (moderate pore size and uniform wall thickness) makes it less prone to ice crystal accumulation, avoiding the risk of blockage in low-temperature environments. The fluid characteristics of the hexagonal honeycomb flow equalization mesh 12 effectively eliminate airflow disturbances and shear noise, resulting in a gentler noise level compared to traditional square or circular flow equalization structures.

[0033] Based on the above embodiments, in this embodiment, Based on the above embodiments, in this embodiment, a cooling core 13 is provided inside the cold air cavity 10, and the cooling core 13 is located at the air inlet of the cold air cavity 10; a heating core 7 is provided inside the warm air cavity 8, and the heating core 7 is located at the air inlet of the warm air cavity 8.

[0034] A cooling core 13 is installed inside the cold air cavity 10, located at the air inlet of the cold air cavity 10, i.e., the initial area where the air outlet of the blower 14 connects to the cold air cavity 10. The cooling core 13 is typically an evaporator assembly. When the cold airflow is output from the blower 14, it first flows through the cooling core 13 and is uniformly cooled to the target temperature through heat exchange, ensuring that the cold air temperature entering the mixing cavity 15 is stable and without local temperature differences.

[0035] Similarly, a heating core 7 is installed inside the warm air cavity 8, located at the air inlet of the warm air cavity 8, which is the initial position where the warm air source connects to the warm air cavity 8. The heating core 7 is usually a heater core. Before entering the mixing chamber 15, the warm air flow must first flow through the heating core 7 and be evenly heated to the set temperature through heat exchange, avoiding temperature fluctuations when the airflow enters the mixing area.

[0036] This structural design ensures that the basic temperature regulation of both hot and cold air is completed before entering the mixing chamber 15, making the initial state of the airflow more controllable. For example, in cooling mode, the temperature uniformity of the cold air increases after passing through the cooling core 13, reducing the phenomenon of hot and cold air clashing within the mixing chamber 15 due to uneven cold air temperature. In heating mode, the temperature distribution of the warm air is uniform after passing through the heating core 7, avoiding the problem of large temperature gradients in warm air affecting the mixing effect in traditional designs. The cooling core 13 and the heating core 7 are located at the air inlet, working synergistically with the subsequent mixing components.

[0037] Based on the above embodiments, in this embodiment, the surface of the hot and cold air damper 9 is provided with guide vanes. It should be noted that the hot and cold air damper 9, as a dual-channel adjustment mechanism, consists of two connected door bodies: one door body (cold air door body) is responsible for controlling the opening and closing state of the connection between the cold air chamber 10 and the warm air chamber 8, as well as the opening and closing degree of the air outlet of the cold air chamber 10; the other door body (warm air door body) focuses on controlling the opening and closing of the air outlet of the warm air chamber 8. Guide vanes are provided on the surface of both door bodies. These guide vanes have a streamlined, slightly convex structure and are evenly distributed on the windward side of the door body. Their design is based on the principles of airflow dynamics, aiming to optimize the initial convergence process of hot and cold air at the inlet of the mixing chamber 15. The thickness and angle of the guide vanes are precisely matched to ensure that when the damper rotates slightly, the airflow naturally forms a velocity gradient as it passes through the guide vane area, avoiding direct collision between hot and cold air.

[0038] Because both doors are equipped with guide vanes, the hot and cold air remain in a controlled, preliminary mixing state during the damper adjustment process, rather than simply opening and closing the passage. Simultaneously, the streamlined design of the guide vanes reduces airflow resistance, avoiding turbulent noise caused by airflow separation at the edges of traditional dampers, thus laying the foundation for uniform mixing by the subsequent stirring fan 11 and hexagonal honeycomb flow equalization mesh 12. Throughout the entire mixing mechanism, the guide vanes ensure a smooth transition from initial convergence to full mixing of the hot and cold air within the mixing chamber 15, ultimately achieving a high degree of uniformity in the outlet air temperature and velocity fields, thereby enhancing passenger comfort.

[0039] Based on the above embodiments, in this embodiment, the hot and cold air damper 9 has a first angle, a second angle, and a third angle. When the hot and cold air damper 9 is at the first angle, the air inlet of the warm air chamber 8 is closed, and the air outlet of the cold air chamber 10 is open; when the hot and cold air damper 9 is at the second angle, the air inlet of the warm air chamber 8 is open, and the air outlet of the cold air chamber 10 is closed; when the hot and cold air damper 9 is at the third angle, the air inlet of the warm air chamber 8 is open, and the air outlet of the cold air chamber 10 is open.

[0040] In addition, the air mixing device has a pure cooling air mixing mode, a pure heating air mixing mode, and a dual cooling and heating air mixing mode; in the pure cooling air mixing mode, the hot and cold air damper 9 is at the first angle; in the pure heating air mixing mode, the hot and cold air damper 9 is at the second angle; and in the dual cooling and heating air mixing mode, the hot and cold air damper 9 is at the third angle.

[0041] In the HVAC system of an automotive air conditioning unit, the hot and cold air damper 9 achieves near-switching between pure cooling, pure heating, and dual-mode mixing through three preset angle positions. The first angle is used for pure cooling mode, where the inlet of the warm air chamber 8 is completely closed and the outlet of the cold air chamber 10 is fully open, and the system only delivers cold air to avoid interference from warm air. The second angle is used for pure heating mode, where the inlet of the warm air chamber 8 is fully open and the outlet of the cold air chamber 10 is completely closed, and the system only delivers warm air to ensure no cold air mixes in. The third angle is used for dual-mode mixing, where both the inlet of the warm air chamber 8 and the outlet of the cold air chamber 10 are open, allowing hot and cold air to enter the mixing chamber 15 simultaneously in proportion for mixing. The core of this angle design lies in the continuous adjustment characteristic of the damper angle: within the small angle range of the damper, a slight rotation can achieve a smooth adjustment of the ratio of hot and cold air, avoiding the non-linear relationship between damper angle change and outlet air temperature in traditional single-damper designs. For example, when the in-vehicle temperature requirement switches from cooling to hybrid mode, the air damper slowly rotates from the first angle to the third angle, the proportion of cold air gradually decreases and the proportion of warm air gradually increases, the outlet air temperature shows a gradual trend, without obvious temperature changes or fluctuations, making the passengers feel more comfortable.

[0042] In actual operation, the dual-channel structure (two connected door bodies) of the hot and cold air damper 9 achieves dynamic matching of channel opening and closing through angle changes: when the damper rotates, one door body controls the degree of closure of the cold air cavity 10 outlet, and the other door body controls the degree of opening of the warm air cavity 8 inlet. The two work together to ensure that the ratio of cold and hot air flow changes continuously with the angle. This mechanism allows the system to smoothly transition within the angle range of the damper without jumping between pure cooling and mixed modes.

[0043] In this application, the pure cooling mixed air mode (cold air) is achieved through a two-stage mixing device. After the air conditioner is started, the hot and cold air damper 9 is in maximum cooling mode, meaning the warm air cavity 8 is closed and the cold air duct is open. At this time, the natural air blown by the blower 14 dissipates heat through the cooling core 13, becoming cold air. Due to the different temperatures in different areas of the cooling core 13, the cold air entering the cold air cavity 10 has regional temperature differences. This airflow passes through the stirring fan 11, which automatically rotates, mixing the air in the cold air cavity 10 evenly to form a uniformly temperature-differential airflow—this is the first stage of mixing. The uniformly temperature-differential airflow then passes through the hexagonal honeycomb flow equalization mesh 12, becoming a uniformly speed-distributed airflow—this is the second stage of mixing. Through the first and second stages of mixing, the HVAC outlet air becomes cold air with uniform speed and temperature, greatly improving the comfort of the air conditioner.

[0044] The pure heating mixed-air mode also uses a two-stage mixing device. After the air conditioner is turned on, the hot and cold air damper 9 is in maximum heating mode. The natural air blown by the blower 14 passes through the cooling core 13 (cooling core 13 is not turned on), and then through the heating core 7 (heating is turned on), becoming hot air. Since the temperature of each area of ​​the heating core 7 is not the same, there is a regional temperature difference in the hot air entering the warm air cavity 8. After this airflow passes through the stirring fan 11, the stirring fan 11 automatically rotates, mixing the air in the warm air cavity 8 evenly, forming an airflow with a uniform temperature difference. This is the first stage of mixing. The airflow with a uniform temperature difference passes through the hexagonal honeycomb air distribution mesh, and then becomes an airflow with a uniform wind speed, forming the second stage of mixing. Through the first and second stages of mixing, the HVAC outlet air becomes hot air with a uniform wind speed and temperature, greatly improving the comfort of the air conditioning heating.

[0045] The hot and cold dual-mixing mode mixes air through a three-stage mixing device.

[0046] First-stage air mixing: After the air conditioner's heating function is activated, the hot / cold air damper 9 is positioned in a certain range between maximum cooling and heating. The position of the hot / cold air damper 9 can be adjusted according to the set temperature of the air conditioner. Part of the natural air blown by the blower 14 passes through the cooling core 13 (when the cooling core 13 is open), becoming cold air and entering the cold air chamber 10; the other part of the cold air passes through the heating core 7 (when the heating core 7 is open), becoming hot air and entering the warm air chamber 8. The air exiting the cold air chamber 10 and the hot air exiting the warm air chamber 8 pass through the guide vanes on the surface of the hot / cold air damper 9, utilizing shear and vortex effects to cause the two airflows to initially converge in the mixing chamber 15, exchanging energy and forming first-stage air mixing. The airflow after first-stage air mixing passes through the stirring fan 11, which automatically rotates, further mixing the relatively uniformly heated and cooled air to form a more uniformly temperatured airflow, forming second-stage air mixing. The uniformly temperatured airflow after first and second-stage air mixing passes through the hexagonal honeycomb flow equalization mesh 12, becoming a uniformly speeding airflow, forming third-stage air mixing. Through the first, second, and third stages of air mixing, the HVAC outlet air becomes an airflow with uniform wind speed and temperature, ensuring that the outlet air velocity field and temperature field are highly uniform, greatly improving the comfort of the air conditioning heating air.

[0047] In summary, in the HVAC system of an automotive air conditioning unit, high-precision and linear control is achieved through independently adjustable hot and cold air dampers 9. As a dual-channel mechanism, the angle change of this damper can accurately match the ratio of hot and cold air volume, so that the outlet air temperature and the damper opening have a better linear relationship, thereby improving temperature control accuracy and response speed.

[0048] By employing different mixing mechanisms—primary mixing, secondary flow equalization, or primary-secondary mixing and tertiary flow equalization—mixing uniformity is achieved, forcing multiple and thorough energy exchanges between hot and cold airflows during the flow process, thus solving the problem of uneven mixing in traditional methods. Primary mixing occurs in the guide vane area on the damper surface: when hot and cold airflows pass through the guide vanes, the velocity difference generates shearing effects (sliding friction between airflow layers) and vortex effects (locally rotating airflow), causing the hot and cold airflows to initially converge and exchange energy, and the temperature gradient begins to decrease. Secondary mixing is accomplished by the airflow-driven stirring vane 11, which automatically rotates within the mixing chamber 15 (without additional power), forcing the hot and cold airflows to repeatedly converge in the flow path, forming multiple energy exchanges. Tertiary mixing is achieved through a hexagonal honeycomb flow equalization net 12. When the airflow flows through the honeycomb channels, the obtuse angle design reduces airflow separation and vortex energy, further uniformizing the wind speed distribution. The entire process requires no external control. The hot and cold air are fully mixed before entering the mixing chamber 15, which completely solves the problem of uneven mixing caused by direct airflow collision in the traditional method, and significantly improves the uniformity of the outlet temperature.

[0049] The low noise and high comfort stem from the structural characteristics of the hexagonal honeycomb airflow equalization mesh 12. The 120-degree angle of the hexagonal structure ensures that the airflow is evenly distributed, avoiding stress concentration. At the same time, the high porosity design (high airflow volume ratio) ensures that the airflow pressure drop is minimized, and the flow channel is close to an ideal "flow tube," significantly reducing airflow disturbance and shear noise. In actual operation, compared with the traditional square airflow equalization mesh 12, the honeycomb structure has a lower noise level at low speeds (such as idling or low-speed driving), and passengers can hardly perceive wind noise. Simultaneously, this design makes the outlet air velocity field and temperature field highly uniform: the temperature field has no local overheating or undercooling points, and the velocity field has no sudden changes in wind speed, so passengers do not experience uneven heating or cooling or uncomfortable wind. For example, in winter heating mode, the temperature of the mixed airflow transitions smoothly, avoiding the "sudden hot and cold" phenomenon of traditional air conditioning outlets; in summer cooling mode, after the cold air is mixed with a small amount of warm air, the outlet air is closer to the set temperature, reducing the discomfort caused by frequent system start-stop cycles. The entire device is lightweight and operates stably, requiring no additional energy consumption, and effectively improving the comfort performance of the air conditioning system.

[0050] Secondly, embodiments of this application provide a vehicle that includes the HVAC assembly mixing device of the vehicle air conditioning system provided in any of the above embodiments of this application.

[0051] By setting a mixing chamber 15, a cold air chamber 10, and a warm air chamber 8 inside the housing 2, and using a control mechanism 6 to adjust the angle of the hot and cold air dampers 9, dynamic matching is achieved between the opening degree of the air inlet of the warm air chamber 8 and the closing degree of the air outlet of the cold air chamber 10. This design allows the flow ratio of cold and hot air to be smoothly adjusted with the change of damper angle, avoiding the nonlinear relationship between damper movement and outlet air temperature in traditional single-damper mixing methods. This significantly reduces the rate of change of outlet air temperature within the small-angle rotation range of the damper. At the same time, cold and hot air enter the mixing chamber 15 separately through damper control, reducing direct collision and shearing phenomena of airflow in the mixing chamber 15, effectively suppressing airflow disturbance and noise generation, thereby promoting uniform mixing of cold and hot air in the mixing chamber 15 and improving the overall comfort performance of the air conditioning system.

[0052] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0053] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A mixing device for an HVAC assembly in an automotive air conditioning system, characterized in that, It includes: Housing (2), a blower (14) is provided on one side of the housing (2); A mixing chamber (15) is provided inside the housing (2), and a mixing assembly is provided inside the mixing chamber (15); The cold air chamber (10) is located inside the housing (2), and the air inlet of the cold air chamber (10) is connected to the air outlet of the blower (14), and the air outlet is connected to the mixing chamber (15). The warm air chamber (8) is located inside the housing (2). A hot and cold air damper (9) is provided between the air inlet of the warm air chamber (8) and the cold air chamber (10). The air outlet is connected to the mixing chamber (15). The control mechanism (6) is connected to the hot and cold air damper (9) and is used to control the angle of the hot and cold air damper (9) so that the air inlet of the warm air chamber (8) is opened or closed and the air outlet of the cold air chamber (10) is closed or opened.

2. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 1, characterized in that: The hot and cold air damper (9) has a first angle, a second angle and a third angle; When the hot and cold air damper (9) is at the first angle, the air inlet of the warm air chamber (8) is closed and the air outlet of the cold air chamber (10) is open; When the hot and cold air damper (9) is at the second angle, the air inlet of the warm air chamber (8) is open and the air outlet of the cold air chamber (10) is closed; When the hot and cold air damper (9) is at the third angle, the air inlet of the warm air chamber (8) is opened and the air outlet of the cold air chamber (10) is opened.

3. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 2, characterized in that: The air mixing device has a pure cooling air mixing mode, a pure heating air mixing mode, and a dual cooling and heating air mixing mode. In the pure cooling mixed air mode, the hot and cold air damper (9) is at the first angle; In the pure hot air mixing mode, the hot and cold air damper (9) is at the second angle; In the hot and cold dual-mixed air mode, the hot and cold air damper (9) is at the third angle.

4. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 1, characterized in that, The air mixing component includes: A stirring fan (11) is disposed inside the mixing chamber (15); The flow equalization net (12) is located inside the mixing chamber (15) and along the air outlet direction. The flow equalization net (12) is located downstream of the stirring fan (11).

5. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 4, characterized in that: The flow distribution network (12) is provided with hexagonal air outlets evenly distributed on it.

6. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 1, characterized in that: The cold air cavity (10) is provided with a cooling core (13), which is located at the air inlet of the cold air cavity (10).

7. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 1, characterized in that: The heating core (7) is provided inside the heating air cavity (8) and is located at the air inlet of the heating air cavity (8).

8. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 1, characterized in that: The surface of the hot and cold air damper (9) is provided with a guide plate.

9. The HVAC assembly mixing device for an automotive air conditioning system as described in claim 1, characterized in that: The surface of the housing (2) is provided with a defrost air outlet (4) and a face blowing air outlet (5), and both the defrost air outlet (4) and the face blowing air outlet (5) are connected to the interior of the mixing chamber (15).

10. A car, characterized in that, It includes: The HVAC assembly mixing device for an automotive air conditioning system as described in any one of claims 1-9.

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