Automobile single refrigeration air conditioning assembly and air inlet control method thereof

Abstract

The application belongs to the technical field of automobile air conditioners, and discloses a single-refrigeration automobile air conditioner assembly and an air inlet control method thereof. The air conditioner assembly comprises a shell assembly, an air inlet assembly, a driving mechanism and a distributor shell. The air inlet assembly is internally provided with three circulating air doors, including two internal circulating air doors and one external circulating air door. The driving mechanism comprises a single driving source. The three circulating air doors are driven to rotate to different opening degree positions by a linkage assembly, so that the internal and external circulating air inlet proportion is adjusted. Under the premise of canceling the heating mechanism and the air mixing door, the three circulating air doors are arranged in the air inlet assembly, and the single motor is used to drive the linkage assembly to finely adjust the internal and external circulating air inlet proportion. The external natural air and the cold air are mixed in different proportions, the air outlet temperature is adjusted, and the single-refrigeration automobile air conditioner system is particularly suitable for tropical regions such as Indonesia and Malaysia.

Description

Technical Field

[0001] This invention belongs to the field of automotive air conditioning technology, and specifically relates to an automotive single-cooling air conditioning assembly and its air intake control method. Background Technology

[0002] Automotive air conditioning systems are divided into heating and cooling systems and single-cooling systems. Heating and cooling systems include a heating mechanism, a mixing damper, and an actuator, and can regulate temperature, but they are expensive and heavy. Single-cooling systems eliminate these components, resulting in lower cost and weight, and are widely used in tropical countries such as Indonesia and Malaysia.

[0003] However, existing single-cooling air conditioning assemblies have the following shortcomings: First, the air intake structure has only two air dampers, which can only switch between internal and external circulation modes and cannot adjust the ratio of internal and external circulation; Second, the heat source and air mixing components have been eliminated, so they can only output the lowest temperature and cannot use the outside natural wind to adjust the air outlet temperature, which can easily lead to passenger complaints; Third, long-term internal circulation mode can easily cause the glass to fog up, affecting driving safety.

[0004] Therefore, those skilled in the art urgently need to develop a systematic automotive single-cooling air conditioning assembly and its air intake control method. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an automotive single-cooling air conditioning assembly and its air intake control method.

[0006] This invention provides a single-cooling air conditioning assembly for automobiles, comprising: A housing assembly having an airflow channel formed therein, and an evaporator assembly disposed within the airflow channel; An air inlet assembly is located on the upstream side of the housing assembly. A sealed cavity is formed inside the air inlet assembly. Three circulation dampers are arranged in the sealed cavity. The three circulation dampers are arranged side by side along the airflow direction, including two inner circulation dampers and one outer circulation damper. The drive mechanism includes a single drive source, which is connected to the three circulating dampers respectively through a linkage component to drive the three circulating dampers to rotate to different opening positions to adjust the ratio of internal and external air intake. A distributor housing is disposed on the downstream side of the housing assembly, and multiple mode dampers are provided inside the distributor housing for distributing airflow to different air outlets.

[0007] Further configuration: The linkage component includes: A mode dial, wherein the mode dial is provided with multiple guide grooves with different trajectories; A motor drive disk is fixedly connected to the motor drive shaft of the drive source, and the motor drive disk is driven by the mode dial through gears.

[0008] Further configuration: The linkage component also includes: The linkage mechanism is provided in three sets, and each set of the linkage mechanism includes a crank and a drive rod; Three cranks are respectively fixedly connected to the ends of the shafts of the three circulating dampers, and each crank is provided with a gear segment; One end of each drive lever is slidably or rollably constrained in the corresponding guide groove of the mode dial, and the other end is provided with a gear segment that meshes with the gear segment of the corresponding crank. When the mode dial rotates, the motor drive disk and the linkage mechanism drive the corresponding circulating damper to rotate to different preset angles.

[0009] Further configuration: It also includes a controller and sensors. The controller is electrically connected to the drive source. The controller is configured to send control commands to the drive source according to a preset control strategy based on the received sensor signals, so as to drive the linkage component to adjust the three circulating dampers to the target opening position.

[0010] Further configuration: The housing assembly includes an upper blower volute and a lower blower volute, and a blower assembly is installed between the upper blower volute and the lower blower volute; The air inlet assembly is connected to the upper volute and the lower volute of the blower.

[0011] Further details: The automotive air conditioning assembly does not include a heating mechanism, a mixing damper, or its actuator.

[0012] The present invention also provides an air intake control method for a single-cooling air conditioning assembly in an automobile, applied to the single-cooling air conditioning assembly in an automobile as described above, the air intake control method comprising the following steps: The environmental status parameters of the vehicle are obtained, including at least one of ambient temperature, ambient humidity, solar radiation intensity, in-vehicle CO2 concentration, and vehicle speed. Based on the environmental state parameters, the target internal and external air circulation ratio is determined according to the preset control logic. Based on the target internal and external air circulation ratio, a drive command is generated and sent to the drive mechanism; The drive mechanism responds to the drive command and synchronously drives the three circulating dampers to rotate to their respective target openings.

[0013] Further settings: The preset control logic includes: When the ambient temperature is in the first temperature range, the target internal and external air circulation ratio is determined to be 100% internal circulation; When the ambient temperature is in the second temperature range, the target internal and external air circulation ratio is determined to be 75% internal circulation and 25% external circulation. When the ambient temperature is in the third temperature range and the ambient humidity is less than the first humidity threshold, the target internal and external air intake ratio is determined to be 50% internal circulation and 50% external circulation. When the ambient temperature is in the third temperature range and the ambient humidity is greater than or equal to the first humidity threshold, the target internal and external air intake ratio is determined to be 25% internal circulation and 75% external circulation. When the ambient temperature is in the fourth temperature range, the target internal and external air circulation ratio is determined to be 100% external circulation.

[0014] Further configuration: The preset control logic also includes: when the solar radiation intensity exceeds the first radiation threshold, increasing the internal circulation ratio in the target internal and external circulation air intake ratio.

[0015] Further configuration: The preset control logic also includes: When the CO2 concentration inside the vehicle exceeds a first concentration threshold, the proportion of external circulation in the target internal / external air circulation intake ratio is increased; and / or, When the vehicle speed is detected to exceed the first vehicle speed threshold, the external circulation ratio in the target internal and external circulation air intake ratio is increased.

[0016] Further setting: The method is only executed when the vehicle's air conditioning assembly is in automatic mode.

[0017] Compared with the prior art, the present invention has the following advantages: This invention achieves precise adjustment of the ratio of internal and external air intake by setting three circulation dampers (two internal circulation dampers and one external circulation damper) in the air intake assembly and using a single motor driven linkage component. By mixing different proportions of external natural air and cold air, the invention achieves adjustable air outlet temperature without eliminating the heating mechanism and mixing damper. This solves the problem that traditional single-cooling air conditioning assemblies can only output the lowest temperature and are prone to fogging, thus improving passenger comfort.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the overall structure of the single-cooling air conditioning assembly of the present invention is shown; Figure 2 A schematic diagram of the split structure of the single-cooling air conditioning assembly of the present invention is shown; Figure 3 A schematic diagram of the air inlet assembly of the present invention is shown; Figure 4 A schematic diagram of the linkage component of the present invention is shown; Figure 5 A schematic diagram of the linkage mechanism of the present invention is shown; Figure 6 This diagram illustrates the internal and external air circulation ratio mode of the present invention. Figure 7 A flowchart of the air intake control method of the present invention is shown; Figure 8 The table shows a comparison of the bench performance data of the present invention. Figure 9 The diagram shows the daytime driving test data of the present invention.

[0021] In the diagram: 1. Air inlet assembly; 2. Upper blower volute; 3. Lower blower volute; 4. Blower assembly; 5. Air outlet sponge; 6. Air outlet; 7. Mode disc and drive unit; 8. Mode motor; 9. Distributor housing; 10. Face blowing damper assembly; 11. Defrost damper assembly; 12. Foot blowing damper assembly; 13. Distributor left housing; 14. Central partition; 15. Distributor right housing; 16. Sealing sponge; 17. Evaporator assembly; 18. Inlet... 19. Air inlet transition duct; 20. Air inlet left housing; 21. Air inlet right housing; 22. External circulation damper; 23. Internal circulation damper one; 24. Internal circulation damper two; 25. Filter plug; 26. Linkage assembly; 27. Drive source; 28. First crank; 29. ​​Second crank; 30. First drive rod; 31. Second drive rod; 32. Third crank; 33. Mode dial; 34. Motor drive shaft; 35. Motor drive disc. Detailed Implementation

[0022] 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.

[0023] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0024] This invention provides a single-cooling air conditioning assembly for automobiles.

[0025] like Figure 1 As shown, the automotive single-cooling air conditioning assembly includes a housing assembly, an air inlet assembly 1, a drive mechanism, and a distributor housing 9; wherein, the housing assembly includes an upper blower volute 2 and a lower blower volute 3, a blower assembly 4 is installed inside the upper blower volute 2 and the lower blower volute 3, an evaporator assembly 17 is installed inside the lower blower volute 3, the air inlet assembly 1 is connected to the upper blower volute 2 and the lower blower volute 3, the distributor housing 9 is connected to the lower blower volute 3, an air outlet 6 is connected to the upper exterior of the distributor housing 9, and an air outlet sponge 5 is provided at the connection interface between the air outlet 6 and the distributor housing 9; In this embodiment, the upper volute 2 and the lower volute 3 of the blower are joined to form a closed volute cavity, and a sealing sponge 16 is provided at the interface between the two to form a sealing pad. The sealing sponge 16 fills the gap between the upper volute 2 and the lower volute 3 of the blower, playing a sealing role and preventing cold air leakage at the interface. The blower assembly 4 is installed in the volute cavity, and the volute cavity serves as an intermediate channel connecting the air inlet assembly 1 and the distributor housing 9, forming a complete airflow path. When the blower assembly 4 is running, outside air (external circulation) or vehicle interior air... (Internal circulation) After being drawn in through the air inlet assembly 1, it enters the air inlet chamber connected to the upper volute 2 and lower volute 3 of the blower. Then it is drawn in and pressurized by the blower assembly 4. The spiral structure of the volute can organize the disordered rotating airflow into an orderly axial or radial airflow, increasing the outlet pressure and flow rate, ensuring that the airflow can pass smoothly through the subsequent evaporator assembly 17 and distributor housing 9, so that the airflow flows out stably along the outlet 6. The outlet sponge 5 fills the assembly gap between the distributor housing 9 and the outlet 6, which plays a sealing role and prevents cold air from leaking at the interface.

[0026] like Figure 3As shown, the air inlet assembly 1 is disposed on the upstream side of the housing assembly, wherein the air inlet assembly 1 includes an air inlet transition duct 18, an air inlet left housing 19 and an air inlet right housing 20; In this embodiment, the air inlet assembly 1 is located upstream of the housing assembly (upper volute 2 of the blower and lower volute 3 of the blower), which is the first barrier for airflow to enter the air conditioning assembly. The left housing 19 and the right housing 20 of the air inlet are joined together to form a sealed cavity, which can effectively prevent unregulated air from seeping in from the gaps and ensure the accuracy of the air intake ratio control. The left housing 19 and the right housing 20 of the air inlet are respectively provided with an external circulation air inlet and an internal circulation air inlet, which are connected to the external environment and the passenger compartment respectively. In this embodiment, the air inlet transition duct 18 connects the left air inlet housing 19, the right air inlet housing 20, and the upper volute of the blower. It serves as a transition channel for airflow from the air inlet assembly 1 into the blower volute, smoothly guiding the airflow from the air inlet to the blower volute, reducing airflow turbulence and pressure loss, and improving intake efficiency. The filter plug 24 is a removable cover plate installed on the housing of the air inlet assembly 1, located on the outer wall of the left air inlet housing 19 and the right air inlet housing 20, corresponding to the installation port of the air conditioning filter. It is used to filter dust, pollen, particulate matter, and other impurities in the air entering the passenger compartment, preventing unfiltered air from directly entering the air conditioning assembly through the installation port gap, and ensuring that all air entering the passenger compartment is purified by the filter.

[0027] When the blower assembly 4 is running, negative pressure is generated in the sealed cavity. Outside air or vehicle interior air is drawn in through the corresponding air damper opening, and after being guided by the air inlet transition duct 18, it enters the upper volute 2 and lower volute 3 of the blower.

[0028] Furthermore, the air inlet assembly 1 has a sealed cavity inside, and three circulation dampers are provided in the sealed cavity. The three circulation dampers are arranged side by side along the airflow direction, including two inner circulation dampers and one outer circulation damper 21. The two inner circulation dampers are inner circulation damper one 22 and inner circulation damper two 23. In this embodiment, three circulation dampers (external circulation damper 21, internal circulation damper 1 22, and internal circulation damper 23) are arranged side by side along the airflow direction inside the sealed cavity of the air inlet assembly 1 to control the ratio of outside air (external circulation) and vehicle interior air (internal circulation) entering the air conditioning system. Among them, the external circulation damper 21 is located at the external circulation air inlet to control the opening of the passage for outside air to enter the air inlet cavity, and the internal circulation damper 1 22 and internal circulation damper 23 are located at the internal circulation air inlet to control the opening of the passage for vehicle interior air to enter the air inlet cavity.

[0029] It should be noted that the asymmetrical layout of "two internal circulation dampers and one external circulation damper" used in this embodiment, rather than "one internal circulation damper and two external circulation dampers" or other combinations, is a targeted design based on the high temperature and humidity characteristics of tropical regions. After being exposed to the high temperatures of tropical regions, the larger internal circulation channel area (two internal circulation dampers) can more quickly seal off the air inside the vehicle and recirculate it for cooling, rapidly reducing the temperature inside the vehicle. Therefore, during steady-state operation, ensuring sufficient internal circulation airflow is prioritized, which can better isolate the high external temperature, reduce temperature fluctuations, and improve passenger comfort. When fresh air needs to be introduced, the smaller external circulation channel (one external circulation damper) can precisely control the amount of high-humidity air entering from outside, avoiding the introduction of a large amount of moisture at once that could cause severe fogging, while also providing the necessary oxygen to ensure the air quality inside the vehicle.

[0030] Furthermore, the drive mechanism includes a single drive source 26, which is connected to the three circulating dampers respectively through a linkage component 25 to drive the three circulating dampers to rotate to different opening positions to adjust the ratio of internal and external air circulation. In this embodiment, the drive source 26 is the drive motor, which includes a DC motor, a reduction gear set, and a motor drive shaft 34. The drive source 26 is installed on one side of the air inlet assembly 1. When the drive motor is working, the motor rotor rotates. After the reduction gear set reduces the speed and increases the torque, the rotational motion is output through the motor drive shaft 34. The three circulation dampers can be synchronously rotated to different opening positions through the drive source 26 and the linkage component 25 to realize five internal and external circulation ratio modes: 100% internal circulation, 75% internal circulation + 25% external circulation, 50% internal circulation + 50% external circulation, 25% internal circulation + 75% external circulation, and 100% external circulation.

[0031] Using only one drive motor to control the complex movements of three circulating dampers significantly reduces material and assembly costs compared to equipping each damper with a separate motor (requiring three motors).

[0032] like Figure 4 As shown, the linkage component 25 includes a mode dial 33, a motor drive disk 35, and a linkage mechanism; wherein, the mode dial 33 is connected to the output end of the drive source 26, and the mode dial 33 is provided with multiple guide grooves with different trajectories; the motor drive disk 35 is fixedly connected to the motor drive shaft 34 of the drive source 26, and the motor drive disk 35 is driven by the mode dial 33 through gear meshing; In this embodiment, the linkage component 25 is the core mechanical transmission mechanism connecting the drive motor (drive source 26) and the three circulating dampers. It can convert the rotational motion output by the drive motor into the reciprocating swing motion of the linkage mechanism through gear meshing and guide grooves, thereby driving the three circulating dampers to rotate to a preset angle, thus achieving precise control of the opening degree of the three dampers. The mode dial 33 is a disc-shaped part with multiple arc-shaped guide grooves with different trajectories. Each guide groove corresponds to the motion trajectory of a circulating damper. The outer circumference of the mode dial 33 is provided with gear teeth that mesh with the gear teeth on the motor drive disk 35 to form a pair of gear transmission pairs. The gear transmission pairs between the motor drive disk 35 and the mode dial 33 have a certain reduction ratio, which can convert the high-speed, low-torque output of the drive motor into a low-speed, high-torque output, ensuring that there is enough torque to overcome the friction and airflow force of the rotating circulating dampers. During operation, when the drive source 26 drives the motor drive disk 35 to rotate via the motor drive shaft 34, it synchronously drives the mode dial 33, which meshes with the motor drive disk 35, to rotate. The guide groove on the mode dial 33 rotates accordingly, guiding one end of the linkage mechanism inserted into the groove to move along the groove's trajectory. Since the trajectories of each guide groove are different, at the same rotation angle of the mode dial 33, the other end of the linkage mechanism is guided to different positions, thereby enabling the three circulating dampers to reach their respective different opening degrees.

[0033] like Figure 5 As shown, the linkage mechanism is provided in three sets. Each set of the linkage mechanism includes a crank and a drive rod. The three cranks are respectively fixedly connected to the ends of the rotating shafts of the three circulating dampers. Each crank is provided with a gear segment. One end of each drive rod is slidably or rollingly constrained in the corresponding guide groove of the mode dial 33, and the other end is provided with a gear segment that meshes with the gear segment of the corresponding crank. The three cranks are the first crank 27, the second crank 28 and the third crank 31, and the three drive rods are the first drive rod 29, the second drive rod 30 and the third drive rod 32. In this embodiment, one end of the first drive rod 29, the second drive rod 30, and the third drive rod 32 are all slidably or rollably constrained in the corresponding guide groove of the mode dial 33, and the other end of each of the three drive rods is provided with a gear segment; one end of the first crank 27, the second crank 28, and the third crank 31 are respectively fixedly connected to the shaft ends of the inner circulation damper 22, the inner circulation damper 23, and the outer circulation damper 21, and the other end of each of the three cranks is provided with a gear segment that meshes with the gear segment of the corresponding drive rod, and the three cranks are also provided with a fulcrum so that they can swing around the fulcrum; Specifically, the other ends of the first crank 27, the second crank 28, and the third crank 31 are each provided with a gear segment, which is used to mesh with the gear segments on the other ends of the first drive rod 29, the second drive rod 30, and the third drive rod 32, respectively; wherein, the inner circulation damper 22 is connected to the mode dial 33 through the first crank 27 and the first drive rod 29, the inner circulation damper 23 is connected to the mode dial 33 through the second crank 28 and the second drive rod 30, and the outer circulation damper 21 is connected to the mode dial 33 through the third crank 31 and the third drive rod 32; During operation, when the drive source 26 drives the mode dial 33 to rotate via the motor drive disk 35, the guide groove on the mode dial 33 pushes the three drive rods to move along the guide groove trajectory, thereby driving the cranks connected to the corresponding drive rods. The cranks swing around the fulcrum, driving the rotating shaft of the circulation damper to rotate, so that the three circulation dampers rotate to the corresponding opening positions. That is, in the linkage component 25, the three linkage mechanisms are independent of each other, and the guide groove trajectory of each drive rod is different. Therefore, the three circulation dampers can move according to their own independent motion laws and reach different opening positions under the same rotation angle of the mode dial 33, realizing a variety of internal and external circulation ratio combinations.

[0034] In this embodiment, gear meshing transmission is used. On the one hand, gear meshing has high transmission efficiency and low energy loss, which allows the drive motor to complete the driving of the circulating damper with lower power, which is beneficial to energy saving. On the other hand, gear meshing transmission has a certain self-locking characteristic. When the drive motor stops supplying power, the circulating damper can remain in the current position and will not rotate on its own due to airflow pressure or vehicle vibration, thus ensuring the stability of the damper position.

[0035] like Figure 2 As shown, the evaporator assembly 17 is installed inside the lower volute 3 of the blower, and the distributor housing 9 is located on the downstream side of the housing assembly. The distributor housing 9 includes a left distributor housing 13, a right distributor housing 15, and a central partition 14 located between the two. In this embodiment, the distributor housing 9 is located downstream of the housing assembly (upper volute 2 of the blower and lower volute 3 of the blower) and is connected to the lower volute 3 of the blower. The cold air cooled by the evaporator assembly 17 enters the interior of the distributor housing 9. The central partition 14 divides the interior of the housing into two independent flow channels, ensuring that the airflow can be evenly distributed to the air outlets 6 on the left and right sides, avoiding the phenomenon of one side being too cold or too hot, and improving the overall temperature uniformity of the passenger compartment.

[0036] Furthermore, the distributor housing 9 is provided with multiple mode dampers for distributing airflow to different air outlets 6. The multiple mode dampers provided in the distributor housing 9 include a face blowing damper assembly 10, a foot blowing damper assembly 12, and a defrost damper assembly 11. In this embodiment, the mating structure of the left housing 13 and the right housing 15 of the dispenser provides a stable mounting base for the multiple mode dampers inside the dispenser housing 9, and also forms a complete air circulation channel. Among them, the face damper assembly 10, the foot damper assembly 12, and the defrost damper assembly 11 are all located inside the upper part of the dispenser housing 9. The three damper assemblies correspond to different air outlet channels: the face damper assembly 10 controls the opening and closing of the air duct that blows cold air towards the occupant's face area, the foot damper assembly 12 controls the opening and closing of the air duct that blows cold air towards the foot area, and the defrost damper assembly 11 controls the opening and closing of the air duct that blows cold air towards the windshield.

[0037] Furthermore, a mode motor 8 is also installed on one side of the dispenser housing 9. The mode motor 8 is connected to the plurality of mode dampers through a mode disk and a drive component 7 to control the opening and closing state of the plurality of mode dampers. In this embodiment, the mode motor 8, mode disk and drive component 7 installed on one side of the dispenser housing 9 are highly similar in structure and principle to the drive source 26 and linkage component 25 installed on the one side of the air inlet assembly 1. Among them, the mode motor 8 is the only power source for controlling the movement of the mode damper. The output end of the mode motor 8 is driven and connected to the input end of the mode disk and drive component 7. The mode disk and drive component 7 are provided with a mode disk and multiple linkages / drive components. The mode disk is machined with guide grooves or cam profiles with different trajectories. When the mode motor 8 receives the instruction from the controller, it drives the mode disk to rotate a certain angle. The guide groove on the disk guides the various drive rods connected to it to make corresponding swing or linear movements, thereby driving the rotating shafts of the face blowing damper assembly 10, foot blowing damper assembly 12 and defrost damper assembly 11 to rotate to a preset angle, realizing the opening or closing of the damper.

[0038] This method allows for synchronous or differentiated control of three mode dampers using only one mode motor 8, significantly reducing cost and weight compared to equipping each damper with a separate motor.

[0039] Furthermore, the automotive air conditioning assembly also includes a controller and sensors. The controller is electrically connected to the drive source 26 and is configured to: based on the received sensor signals, send control commands to the drive source 26 according to a preset control strategy to drive the linkage component 25 to adjust the three circulating air dampers to the target opening position. In this embodiment, the controller receives detection signals from ambient temperature sensors, humidity sensors, solar radiation sensors, in-vehicle CO2 concentration sensors, vehicle speed sensors, etc., mounted on the vehicle. Based on preset control strategies (such as temperature threshold, humidity threshold, radiation threshold, etc.), it determines which internal or external circulation mode should be in the current state and sends corresponding control commands (such as rotation angle, rotation direction) to the drive source 26. The drive linkage component 25 adjusts the three circulation dampers to the target opening position. During the operation of the air conditioning, it continuously monitors the changes in sensor signals and adjusts the internal and external circulation ratio in real time to adapt to the constantly changing vehicle environment and the needs of the occupants.

[0040] Furthermore, the air conditioning assembly does not include a heating mechanism, a mixing damper, or its actuator; It should be noted that the single-cooling air conditioning assembly in this embodiment is mainly aimed at tropical countries such as Indonesia and Malaysia. These regions have the characteristics of high temperature and high humidity all year round and no obvious winter. The average annual temperature is between 25℃ and 32℃, with almost no cold weather, and the relative humidity is above 75% all year round, even close to saturation. Under the above climatic conditions, the heating function is hardly used. Therefore, eliminating the heating mechanism will not have a substantial impact on the user experience. On the contrary, it can reduce costs and weight. Meanwhile, eliminating the mixing damper and its actuator can reduce material costs, contribute to vehicle weight reduction, and save space. On the other hand, the air conditioning assembly in this embodiment adjusts the ratio of internal and external air circulation by setting three circulation dampers to introduce different proportions of outside natural air (warmer outside air) to mix with the cold air, thereby regulating the outlet air temperature. For example, when the occupants feel too cold, the external circulation ratio can be increased to introduce more natural air to mix with the cold air, thus raising the outlet air temperature; conversely, the external circulation ratio can be reduced to enhance the cooling effect.

[0041] Based on the aforementioned automotive single-cooling air conditioning assembly, bench performance testing was conducted on it (referring to the process of quantitatively testing various performance indicators of the automotive air conditioning assembly on a dedicated test bench under controlled conditions in a laboratory environment). Unlike real-vehicle road testing, bench testing is conducted under constant environmental conditions (temperature, humidity, pressure, wind speed, etc.), eliminating interference from uncontrollable factors such as weather, road conditions, and driver behavior, and thus obtaining more stable, repeatable, and comparable test data.

[0042] like Figure 8The figure shows a comparative data chart of bench performance tests for the single-cooling air conditioning assembly in this embodiment. As can be seen from the figure, the test conditions were: inlet air temperature 30℃, ambient humidity 60%, expansion valve inlet pressure 1.48MPa, outlet pressure 0.2MPa, and inlet temperature 50℃, simulating a high-temperature and high-humidity environment in tropical regions. Under these conditions, the air-side cooling capacity of the heating / cooling air conditioning assembly and the single-cooling air conditioning assembly were measured at different airflow rates (250-500 m³ / h) for a comparative analysis. The figure shows that, under the same test conditions and airflow rates, the air-side cooling capacity of the single-cooling air conditioning assembly is higher than that of the heating / cooling air conditioning assembly, by an average of approximately 350-450W.

[0043] Therefore, the single-cooling air conditioning assembly with three circulating dampers in this embodiment is fully capable of matching the usage scenarios in tropical regions.

[0044] The present invention also provides an air intake control method for a single-cooling air conditioning assembly for automobiles, which is applied to the single-cooling air conditioning assembly for automobiles as described above.

[0045] like Figure 7 As shown, the air intake control method includes the following steps: S1. Obtain the environmental status parameters of the vehicle, wherein the environmental status parameters include at least one of ambient temperature, ambient humidity, solar radiation intensity, in-vehicle CO2 concentration and vehicle speed; In this embodiment, the controller collects environmental state parameters of the vehicle in real time through various sensors mounted on the vehicle. The controller can acquire at least one of the environmental state parameters according to the actual situation. The combined use of multiple parameters can achieve a more accurate control effect and provide a sufficient data foundation for subsequent intelligent decision-making.

[0046] S2. Based on the environmental state parameters, determine the target internal and external air circulation ratio according to the preset control logic; In this embodiment, the controller compares the environmental state parameters obtained in step S1 with the preset control logic, and determines the current internal and external air intake ratio mode through condition judgment.

[0047] Specifically, the preset control logic includes: When the ambient temperature is in the first temperature range (high temperature zone, T≥30℃, where T represents the ambient temperature), the target internal and external air circulation ratio is determined to be 100% internal circulation. like Figure 6 As shown in (a), the control logic corresponds to the ambient temperature being in the first temperature range. At this time, the external circulation damper 21 is in a fully closed state, and the internal circulation damper 22 and the internal circulation damper 23 are both in a fully open state, achieving a 100% internal circulation air intake ratio, which is suitable for rapid cooling in high temperature exposure scenarios.

[0048] When the ambient temperature is in the second temperature range (medium-high temperature range, 28℃≤T<30℃), the target internal and external air circulation ratio is determined to be 75% internal circulation and 25% external circulation. like Figure 6 (b) shows the control logic corresponding to the ambient temperature being in the second temperature range; at this time, the external circulation damper 21 opens to a smaller degree, while the internal circulation damper 1 22 and the internal circulation damper 23 open to a larger degree, achieving an air intake ratio of 75% internal circulation and 25% external circulation, while ensuring a relatively strong cooling effect and introducing a small amount of natural wind for preliminary temperature balance.

[0049] When the ambient temperature is in the third temperature range (medium temperature range, 26℃≤T<28℃) and the ambient humidity is less than the first humidity threshold (ambient humidity<75%), the target internal and external air circulation ratio is determined to be 50% internal circulation and 50% external circulation. like Figure 6 As shown in (c), the control logic corresponds to the ambient temperature being in the third temperature range and the ambient humidity being less than the first humidity threshold. At this time, the external circulation damper 21, the internal circulation damper 1 22 and the internal circulation damper 23 are all in a medium opening state, realizing an air intake ratio of 50% internal circulation and 50% external circulation, which is suitable for conventional cooling and ventilation when the outside temperature is moderate.

[0050] When the ambient temperature is in the third temperature range (medium temperature range, 26℃≤T<28℃) and the ambient humidity is greater than or equal to the first humidity threshold (ambient humidity≥75%), the target internal and external air circulation ratio is determined to be 25% internal circulation and 75% external circulation. like Figure 6 As shown in (d), the control logic corresponds to the ambient temperature being in the third temperature range and the ambient humidity being greater than or equal to the first humidity threshold. At this time, the external circulation damper 21 opens to a larger degree, while the internal circulation damper 1 22 and the internal circulation damper 23 open to a smaller degree, achieving an air intake ratio of 25% internal circulation and 75% external circulation. This is mainly used to introduce a large amount of dry natural wind in a high humidity environment to prevent fogging of the passenger cabin glass.

[0051] When the ambient temperature is in the fourth temperature range (low temperature range, 24℃≤T<26℃), the target internal and external air circulation ratio is determined to be 100% external circulation. like Figure 6 As shown in (e), this corresponds to the control logic when the ambient temperature is in the fourth temperature range. At this time, the external circulation damper 21 is fully open, and the internal circulation damper 22 and the internal circulation damper 23 are both fully closed, achieving a 100% external circulation air intake ratio, which is suitable for natural ventilation and energy-saving cooling when the outside temperature is relatively cool.

[0052] It should be noted that in this embodiment, the controller's control logic is mainly based on ambient temperature for differentiated control. When the ambient temperature is in the third temperature range (medium temperature range, 26℃≤T<28℃), the controller will further subdivide based on ambient humidity: when the ambient humidity is less than the first humidity threshold (ambient humidity<75%), it is determined to be 50% internal circulation + 50% external circulation; when the ambient humidity is greater than or equal to the first humidity threshold (ambient humidity≥75%), it is determined to be 25% internal circulation + 75% external circulation. By increasing the proportion of external circulation, the purpose of dehumidification and anti-fogging is achieved.

[0053] Furthermore, the preset control logic also includes: when the solar radiation intensity exceeds the first radiation threshold, increasing the internal circulation ratio in the target internal and external circulation air intake ratio; It should be noted that in this embodiment, the controller's control logic is mainly based on ambient temperature for differentiated control. When the solar radiation intensity exceeds the first radiation threshold (solar radiation intensity > 800W / m²), the controller will increase the internal circulation ratio in the target internal and external air circulation ratio. This is because strong solar radiation can cause the temperature inside the vehicle to rise sharply, and increasing the internal circulation ratio can accelerate the cooling speed.

[0054] Furthermore, the preset control logic also includes: when the CO2 concentration inside the vehicle exceeds a first concentration threshold, increasing the external circulation ratio in the target internal and external air circulation ratio; It should be noted that in this embodiment, the controller's control logic is mainly based on ambient temperature for differentiated control. When the CO2 concentration inside the vehicle exceeds the first concentration threshold (CO2 concentration inside the vehicle > 1800ppm), the controller will increase the external circulation ratio in the target internal and external air circulation ratio. This is because an increase in CO2 concentration indicates that the air inside the vehicle is polluted and fresh air needs to be introduced.

[0055] Furthermore, the preset control logic also includes: when the vehicle speed is detected to exceed the first vehicle speed threshold, increasing the external circulation ratio in the target internal and external circulation air intake ratio; It should be noted that in this embodiment, the controller's control logic is mainly based on ambient temperature for differentiated control. When the vehicle speed exceeds the first vehicle speed threshold (vehicle speed > 100km / h), the controller increases the external circulation ratio in the target internal and external circulation air intake ratio. This is because when driving at high speed, the dynamic pressure generated by the vehicle speed can increase the air intake volume, reduce the blower load, and save energy.

[0056] S3. Generate a drive command based on the target internal and external air circulation ratio and send it to the drive mechanism; In this embodiment, the controller calculates the target opening position of each of the three circulating dampers according to the target internal and external circulating air intake ratio determined in step S2, generates the corresponding drive command and sends it to the drive mechanism; wherein, the drive command includes information such as the angle and direction of rotation required by the drive motor.

[0057] S4. The drive mechanism responds to the drive command and synchronously drives the three circulating dampers to rotate to their respective target openings. In this embodiment, the drive source 26 (drive motor) in the drive mechanism starts after receiving the drive command. It drives the motor drive disk 35 to rotate through the motor drive shaft 34. The motor drive disk 35 drives the mode dial 33 to rotate through gear meshing. The guide groove on the mode dial 33 guides the three drive rods to reciprocate. The drive rods drive the three cranks and the circulation damper to rotate to their respective target opening positions through gear meshing. Since the guide groove trajectories of the three dampers are different, the three dampers reach different opening positions under the same rotation angle of the mode dial 33, thus achieving the required internal and external circulation air intake ratio.

[0058] Furthermore, the method is performed only when the vehicle's air conditioning assembly is in automatic mode; In this embodiment, the controller first detects the current operating mode of the air conditioning unit. If the air conditioning is detected to be in manual mode, the air intake control method of this embodiment is not executed, and the user-set internal and external circulation states remain unchanged. If the air conditioning unit is detected to be in automatic mode, the air intake control method of this embodiment is activated. At this time, the controller continuously monitors the environmental status parameters and adjusts the internal and external circulation ratios in real time according to the parameter changes, so that the air conditioning unit always works in the optimal state.

[0059] In summary, the air intake control method in this embodiment is only executed when the air conditioning assembly is in automatic mode, avoiding the forced change of user settings in manual mode and fully respecting the user's right to choose.

[0060] Based on the implementation of the above method, the present invention also provides an automobile, including the single-cooling air conditioning assembly described above. A daytime driving test is conducted on the automobile equipped with the single-cooling air conditioning assembly having the above three circulating air dampers (a type of real-vehicle road test scenario, referring to the test process that comprehensively verifies the cooling capacity, thermal comfort, energy consumption, and anti-fogging performance of the air conditioning assembly under actual driving conditions with natural sunlight during the day).

[0061] like Figure 9The figure shows the measured data of a daytime driving test (sunlight intensity not less than 300W) of a car using a three-door single-cooling air conditioning assembly in this embodiment. As can be seen from the figure, the ambient temperature in the test scenario was maintained at 22℃, and the test object was the temperature distribution inside the car's passenger compartment (head temperature of the driver / passenger seats and head temperature of the driver / passenger seats in the second row), with a test time span of approximately 8 minutes.

[0062] As can be seen from the figure, the temperature drop in the front driver / passenger seats is greater than that in the rear seats. There is a slight difference in temperature between the driver and passenger seats, but the temperature in the passenger compartment of the car shows a downward trend. This indicates that in daytime driving scenarios with high temperatures and sunlight, the air conditioning system of a car with a three-door single-cooling system has actual cooling capabilities.

[0063] The vehicle in this embodiment is suitable for the automotive markets of tropical regions such as Indonesia, Malaysia, Thailand, and India; and because the air conditioning assembly used has the characteristics of low cost, light weight, and small size, the vehicle in this embodiment is also particularly suitable for small cars, micro cars, and economy models.

[0064] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-cooling air conditioning assembly for automobiles, characterized in that, include: A housing assembly having an airflow channel formed therein, and an evaporator assembly disposed within the airflow channel; An air inlet assembly is located on the upstream side of the housing assembly. A sealed cavity is formed inside the air inlet assembly. Three circulation dampers are arranged in the sealed cavity. The three circulation dampers are arranged side by side along the airflow direction, including two inner circulation dampers and one outer circulation damper. The drive mechanism includes a single drive source, which is connected to the three circulating dampers respectively through a linkage component to drive the three circulating dampers to rotate to different opening positions to adjust the ratio of internal and external air intake. A distributor housing is disposed on the downstream side of the housing assembly, and multiple mode dampers are provided inside the distributor housing for distributing airflow to different air outlets.

2. The automotive single-cooling air conditioning assembly according to claim 1, characterized in that, The linkage component includes: A mode dial, wherein the mode dial is provided with multiple guide grooves with different trajectories; A motor drive disk is fixedly connected to the motor drive shaft of the drive source, and the motor drive disk is driven by the mode dial through gears.

3. The automotive single-cooling air conditioning assembly according to claim 2, characterized in that, The linkage component also includes: The linkage mechanism is provided in three sets, and each set of the linkage mechanism includes a crank and a drive rod; Three cranks are respectively fixedly connected to the ends of the shafts of the three circulating dampers, and each crank is provided with a gear segment; One end of each drive lever is slidably or rollably mounted in the corresponding guide groove of the mode dial, and the other end is provided with a gear segment that meshes with the gear segment of the corresponding crank. When the mode dial rotates, the motor drive disk and the linkage mechanism drive the corresponding circulating damper to rotate to different preset angles.

4. The automotive single-cooling air conditioning assembly according to claim 1, characterized in that, It also includes a controller and sensors. The controller is electrically connected to the drive source and is configured to send control commands to the drive source according to a preset control strategy based on the received sensor signals, so as to drive the linkage component to adjust the three circulating dampers to the target opening position.

5. The automotive single-cooling air conditioning assembly according to claim 1, characterized in that, The housing assembly includes an upper blower volute and a lower blower volute, and a blower assembly is installed between the upper blower volute and the lower blower volute; The air inlet assembly is connected to the upper volute and the lower volute of the blower.

6. The automotive single-cooling air conditioning assembly according to claim 1, characterized in that, The automotive air conditioning assembly does not include the heating mechanism, the mixing damper and its actuator.

7. An air intake control method for a single-cooling air conditioning assembly in an automobile, applied to the single-cooling air conditioning assembly in an automobile as described in any one of claims 1 to 6, characterized in that, The method includes the following steps: The environmental status parameters of the vehicle are obtained, including at least one of ambient temperature, ambient humidity, solar radiation intensity, in-vehicle CO2 concentration, and vehicle speed. Based on the environmental state parameters, the target internal and external air circulation ratio is determined according to the preset control logic. Based on the target internal and external air circulation ratio, a drive command is generated and sent to the drive mechanism; The drive mechanism responds to the drive command and synchronously drives the three circulating dampers to rotate to their respective target openings.

8. The air intake control method according to claim 7, characterized in that, The preset control logic includes: When the ambient temperature is in the first temperature range, the target internal and external air circulation ratio is determined to be 100% internal circulation; When the ambient temperature is in the second temperature range, the target internal and external air circulation ratio is determined to be 75% internal circulation and 25% external circulation. When the ambient temperature is in the third temperature range and the ambient humidity is less than the first humidity threshold, the target internal and external air intake ratio is determined to be 50% internal circulation and 50% external circulation. When the ambient temperature is in the third temperature range and the ambient humidity is greater than or equal to the first humidity threshold, the target internal and external air intake ratio is determined to be 25% internal circulation and 75% external circulation. When the ambient temperature is in the fourth temperature range, the target internal and external air circulation ratio is determined to be 100% external circulation.

9. The air intake control method according to claim 8, characterized in that, The preset control logic also includes: when the solar radiation intensity exceeds the first radiation threshold, increasing the internal circulation ratio in the target internal and external circulation air intake ratio.

10. The air intake control method according to claim 8, characterized in that, The preset control logic also includes: When the CO2 concentration inside the vehicle exceeds a first concentration threshold, the proportion of external circulation in the target internal / external air circulation intake ratio is increased; and / or, When the vehicle speed is detected to exceed the first vehicle speed threshold, the external circulation ratio in the target internal and external circulation air intake ratio is increased.

11. The air intake control method according to claim 7, characterized in that, The method is only performed when the vehicle's air conditioning system is in automatic mode.

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