Air conditioner circulation system, control method of air conditioner circulation system and vehicle

Abstract

The invention discloses an air conditioner circulation system, a control method of the air conditioner circulation system and a vehicle, and belongs to the technical field of vehicles. The air conditioner circulation system is provided with a cavity, a rotating door, a grating assembly and a controller. The cavity is provided with a first air inlet, a second air inlet and an air outlet, and the second air inlet and the air outlet are communicated with the interior of the cockpit. And one end of the rotating door is rotatably connected with the inner wall of the cavity. The grid assembly is located outside the cavity and provided with a third air inlet, and the third air inlet communicates with the first air inlet. The controller is electrically connected with the grille assembly and the rotating door, and the controller is used for controlling the rotating door to rotate to the first position where the first air inlet and the second air inlet are opened and controlling the air inlet amount of the third air inlet to be the first target air amount. By the adoption of the technical scheme, the automobile window can be prevented from fogging, and energy consumption can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to an air-conditioning circulation system, a control method for the air-conditioning circulation system, and a vehicle. Background Art

[0002] The internal and external circulation system of a vehicle is an important part of the air conditioner. Its main function is to improve the air quality inside the vehicle and enhance the riding comfort by adjusting the air circulation mode inside the vehicle. The internal and external circulation system generally includes an internal circulation mode and an external circulation mode. In the internal circulation mode, the air flow channels inside and outside the vehicle are closed, and the air inside the vehicle circulates in a closed space without gas exchange with the outside air. In the external circulation mode, fresh air outside the vehicle can enter the vehicle through the air duct, and the dirty air is discharged, so that gas exchange between the air inside and outside the vehicle is realized. Currently, during the operation of the vehicle, if the temperature difference between the inside and outside of the vehicle is large, the window is likely to fog up.

[0003] In the related art, to avoid window fogging, the mode of the air-conditioning circulation system is switched from the internal circulation mode to the external circulation mode. However, although switching to the external circulation mode can avoid window fogging, the energy consumption in the external circulation mode is relatively high, which is likely to reduce the driving range of the vehicle. Summary of the Invention

[0004] In view of this, the embodiments of the present application provide an air-conditioning circulation system, a control method for the air-conditioning circulation system, and a vehicle, which can both avoid window fogging and save energy consumption.

[0005] In a first aspect, the embodiments of the present application provide an air-conditioning circulation system, which includes a cavity, a rotating door, a grille assembly, and a controller;

[0006] The cavity has a first air inlet, a second air inlet, and an air outlet, and the second air inlet and the air outlet are respectively communicated with the inside of the cockpit;

[0007] One end of the rotating door is rotatably connected to the inner wall of the cavity;

[0008] The grille assembly is located outside the cavity, and the grille assembly has a third air inlet, and the third air inlet is communicated with the first air inlet;

[0009] The controller is electrically connected between the grille assembly and the rotating door respectively. The controller is configured to control the rotating door to rotate to a first position where the first air inlet and the second air inlet are opened, and control the air inflow volume of the third air inlet to be a first target air volume.

[0010] Optionally, the grille assembly includes a driving member, a bearing frame, and a plurality of blades;

[0011] The carrying frame includes a first bracket and a second bracket which are oppositely arranged;

[0012] Both ends of each blade are respectively rotatably connected to the first bracket and the second bracket, the multiple blades are arranged side by side and in parallel, and a third air inlet is formed between two adjacent blades;

[0013] The driving member is electrically connected to the controller, and the driving member is rotatably connected to the blade to adjust the opening degree of the third air inlet.

[0014] Optionally, the driving member includes a driving motor, a first transmission member, a second transmission member and a plurality of connecting rods;

[0015] The driving motor has an output shaft;

[0016] The first transmission member is sleeved on the output shaft;

[0017] The second transmission member is arranged parallel to the output shaft, the first transmission member meshes with the second transmission member, and the first transmission member drives the second transmission member to reciprocate axially;

[0018] One end of the connecting rod is connected to the second transmission member, and the other end is rotatably connected to the corresponding blade.

[0019] Optionally, the air-conditioning circulation system further includes a heater and a blower;

[0020] The heater is located in the cavity, the air inlet end of the heater is respectively communicated with the first air inlet and the second air inlet, and the air outlet end of the heater is communicated with the air outlet;

[0021] The blower is located between the heater and the air outlet, and the air flow flows into the cockpit after passing through the heater, the blower and the air outlet in sequence.

[0022] In a second aspect, an embodiment of the present application further provides a control method for an air-conditioning circulation system, and the method is used to control the air-conditioning circulation system according to any one of the above-mentioned first aspects of the embodiments of the present application. The method includes:

[0023] Obtain a first temperature and a second temperature, wherein the first temperature is the dew point temperature in the vehicle compartment, and the second temperature is the outer surface temperature of the vehicle window;

[0024] In response to the first temperature being greater than the second temperature, generate a first mixed air control instruction;

[0025] Based on the first mixed air control instruction, control the rotating door to rotate to the first position, and control the air intake volume of the third air inlet to be a first target air volume.

[0026] Optionally, the method further includes:

[0027] Obtain the current vehicle speed;

[0028] In response to the current vehicle speed exceeding a first preset vehicle speed, control the rotating door to rotate towards the second air inlet to a second position.

[0029] Optionally, the method further includes:

[0030] Obtain the current vehicle speed;

[0031] In response to the current vehicle speed exceeding the first preset vehicle speed, adjust the air intake volume of the third air inlet to a second target air volume, where the second target air volume is less than the first target air volume.

[0032] Optionally, the method further includes:

[0033] In response to the current vehicle speed exceeding the first preset vehicle speed, control to increase the power of the blower to a first target power.

[0034] Optionally, the method further includes:

[0035] Determine the first temperature based on the external vehicle environment temperature, external vehicle environment humidity, current vehicle speed, and the number of seated passengers inside the vehicle.

[0036] In a third aspect, an embodiment of the present application further provides a vehicle, which has a controller for executing the control method of the air conditioning circulation system according to any one of the embodiments in the second aspect of the present application.

[0037] By using the air conditioning circulation system provided by the embodiment of the present application, the external air flow of the vehicle can flow into the cavity through the first air inlet, the internal air flow of the vehicle can flow into the cavity through the second air inlet, and the gas in the cavity can flow into the cockpit through the air outlet to circulate the air inside the vehicle. When the temperature difference between the inside and outside of the vehicle is large, the controller can be used to control the rotating door in the cavity to rotate to a first position where the first air inlet and the second air inlet are opened, and control the air volume of the third air inlet in the grille assembly to be the first target air volume. Thus, the external air can enter the cavity sequentially through the third air inlet and the first air inlet, and the gas in the cockpit can enter the cavity through the second air inlet. After the external air and the gas in the cockpit are mixed in the cavity, they are output to the cockpit through the air outlet of the cavity. With such a setting, the temperature inside and outside the vehicle can be balanced, thereby avoiding the window from fogging up and improving driving safety. At the same time, the temperature of the mixed gas will not be too low, so the energy consumption of the air conditioning circulation system can be saved. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 It is a schematic structural diagram of a rotating door in a first position in an air-conditioning circulation system provided by an embodiment of the present application;

[0040] Figure 2 It is a schematic structural diagram of a rotating door in a second position in an air-conditioning circulation system provided by an embodiment of the present application;

[0041] Figure 3 It is a schematic structural diagram of a rotating door in a third position in an air-conditioning circulation system provided by an embodiment of the present application;

[0042] Figure 4 It is a top view of a grille assembly in an air-conditioning circulation system provided by an embodiment of the present application;

[0043] Figure 5 It is a side view of a grille assembly in an air-conditioning circulation system provided by an embodiment of the present application;

[0044] Figure 6 It is a flowchart of a control method for an air-conditioning circulation system provided by an embodiment of the present application;

[0045] Figure 7 It is a flowchart of another control method for an air-conditioning circulation system provided by an embodiment of the present application;

[0046] Figure 8 It is a flowchart of another control method for an air-conditioning circulation system provided by an embodiment of the present application.

[0047] Reference numerals:

[0048] 100, cavity; 110, first air inlet; 120, second air inlet; 130, air outlet;

[0049] 200, rotating door;

[0050] 300, grille assembly; 310, third air inlet; 320, driving member; 330, bearing frame; 340, blade; 321, driving motor; 322, first transmission member; 323, second transmission member; 324, connecting rod; 325, output shaft; 331, first bracket; 332, second bracket;

[0051] 400, controller;

[0052] 500, heater;

[0053] 600, Blower

[0054] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and more detailed descriptions will be provided hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed Embodiments

[0055] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0056] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meaning as commonly understood by those skilled in the art.

[0057] To make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the drawings.

[0058] In a first aspect, as shown in conjunction with Figure 1 and Figure 2 , an air-conditioning circulation system is provided in an embodiment of the present application. The air-conditioning circulation system includes a cavity 100, a rotating door 200, a grille assembly 300, and a controller 400. It should be noted that the controller 400 may be, for example, a vehicle controller 400.

[0059] The cavity 100 has a first air inlet 110, a second air inlet 120, and an air outlet 130. The second air inlet 120 and the air outlet 130 are respectively in communication with the inside of the cockpit. One end of the rotating door 200 is rotatably connected to the inner wall of the cavity 100. The grille assembly 300 is located outside the cavity 100, and the grille assembly 300 has a third air inlet 310, and the third air inlet 310 is in communication with the first air inlet 110. With such a setting, the air outside the vehicle can sequentially pass through the third air inlet 310 and the first air inlet 110, enter the cavity 100, and then flow to the inside of the cockpit through the air outlet 130. Thus, the air outside the vehicle can enter the vehicle, realizing the exchange of gas between the outside and the inside of the vehicle. The gas in the cockpit can enter the cavity 100 through the second air inlet 120, and then flow to the inside of the cockpit through the air outlet 130. Thus, the gas inside the vehicle can achieve circular flow.

[0060] The controller 400 is electrically connected to the grille assembly 300 and the rotating door 200 respectively. The controller 400 is configured to control the rotating door 200 to rotate to a first position where the first air inlet 110 and the second air inlet 120 are opened, and control the air inflow rate of the third air inlet 310 to be a first target air volume. It should be noted that in the embodiments of the present application, two devices that are electrically connected to each other can transmit signals and instructions to each other.

[0061] It should be noted that when the temperature difference between the inside and outside of the vehicle is large, for example, when the vehicle is in winter or a low-temperature environment, the controller 400 can be used to control the rotating door 200 in the cavity 100 to rotate to a first position where the first air inlet 110 and the second air inlet 120 are opened, and control the air volume of the third air inlet 310 in the grille assembly 300 to be a first target air volume. Thus, external air can enter the cavity 100 successively through the third air inlet 310 and the first air inlet 110, and the gas in the cockpit can enter the cavity 100 through the second air inlet 120. After the external air and the gas in the cockpit are mixed in the cavity 100, they are then output from the air outlet 130 of the cavity 100 to the cockpit. With such a setting, the temperature inside and outside the vehicle can be balanced, thereby avoiding the windshield from fogging up and improving driving safety. At the same time, the temperature of the mixed gas will not be too low, so the energy consumption of the air-conditioning circulation system can be saved.

[0062] The following combines the attached Figures 1 to 5 to provide a more specific and detailed description of the various component structures and functions of the air-conditioning circulation system provided by the embodiments of the present application.

[0063] Combined with Figure 1 、 Figure 2 and Figure 3As shown, in some embodiments, the area of the rotating door 200 is not less than the area of the first air inlet 110 and not less than the area of the second air inlet 120. With such a setting, it can be ensured that the rotating door 200 can close the first air inlet 110 to meet the air inlet requirements in the internal circulation mode of the air conditioning circulation system, and it can also be ensured that the rotating door 200 can close the second air inlet 120 to meet the air inlet requirements in the external circulation mode of the air conditioning circulation system. It should be noted that when the air conditioning circulation system is in the internal circulation mode, the rotating door 200 rotates to the third position to close the first air inlet 110. At this time, the gas in the cavity 100 is only the gas in the cockpit entering from the second air inlet 120. When the air conditioning circulation system is in the external circulation mode, the rotating door 200 rotates to the second position to close the second air inlet 120. At this time, the gas in the cavity 100 is only the gas outside the vehicle entering from the first air inlet 110. When the air conditioning circulation system is in the mixed air mode, the rotating door 200 rotates to the third position between the first position and the second position. At this time, both the first air inlet 110 and the second air inlet 120 are open, and the gas entering the cavity 100 includes the gas outside the vehicle and the gas in the cockpit.

[0064] As Figure 4 and Figure 5 As shown, in some embodiments, the grille assembly 300 includes a driving member 320, a bearing frame 330, and a plurality of blades 340. The bearing frame 330 includes a first bracket 331 and a second bracket 332 which are oppositely arranged.

[0065] Both ends of each blade 340 are rotatably connected to the first bracket 331 and the second bracket 332 respectively. The plurality of blades 340 are arranged side by side and in parallel, and a third air inlet 310 is formed between two adjacent blades 340. It can be understood that the first bracket 331 and the second bracket 332 can respectively support the blades 340. Both ends of each blade 340 can be rotatably connected to the first bracket 331 and the second bracket 332 respectively through a pin shaft, so as to realize the flexible rotation of the blade 340.

[0066] The driving member 320 is electrically connected to the controller 400. The driving member 320 is rotatably connected to the blade 340 to adjust the opening degree of the third air inlet 310. It should be noted that the controller 400 can control the driving member 320 to rotate, so that the driving member 320 can drive the plurality of blades 340 to rotate synchronously, thereby adjusting the opening degree of the third air inlet 310 between two adjacent blades 340, and further adjusting the total air intake of the grille assembly 300 to cooperate with the first air inlet 110, so that the outside air can enter the cavity 100 according to the required amount. By providing the rotatable blades 340 in the embodiments of the present application, the flexible control of the gas volume entering the cavity 100 can be improved.

[0067] Combined withFigure 4 and Figure 5 As shown in Figure 5 , in some embodiments, the driving member 320 includes a driving motor 321, a first transmission member 322, a second transmission member 323, and a plurality of connecting rods 324. The driving motor 321 has an output shaft 325. The first transmission member 322 is sleeved on the output shaft 325. The second transmission member 323 is arranged parallel to the output shaft 325. The first transmission member 322 meshes with the second transmission member 323, and the first transmission member 322 drives the second transmission member 323 to reciprocate axially. One end of the connecting rod 324 is connected to the second transmission member 323, and the other end is rotatably connected to the corresponding blade 340. It should be noted that when the driving motor 321 is started, the first transmission member 322 can rotate synchronously with the output shaft 325. The second transmission member 323 is driven by the first transmission member 322 to move away from or close to the driving motor 321, so that the second transmission member 323 can drive the connecting rod 324 to move synchronously. Furthermore, the blade 340 rotatably connected to the connecting rod 324 can generate rotation.

[0068] Combined with Figure 4 and Figure 5 As shown in Figure 5 , in some embodiments, the second transmission member 323 is parallel to the first bracket 331 and parallel to the second bracket 332, and the second transmission member 323 is arranged along the symmetry axis of the blade 340. Thus, it can not only ensure that the connecting rod 324 can drive a plurality of blades 340 to rotate synchronously, improve the rotation efficiency of the blades 340, but also ensure the force balance on both sides of the blades 340.

[0069] In some embodiments, the first transmission member 322 is a gear, and the second transmission member 323 is a rack. The tooth surface of the gear meshes with the tooth surface of the rack, and the connecting rod 324 is connected to the rack. It should be understood that the connecting rod 324 can move synchronously with the rack.

[0070] In other embodiments, the first transmission member 322 is a worm gear, and the second transmission member 323 is a worm. The worm gear meshes with the worm, and the connecting rod 324 is connected to the worm. It should be understood that the connecting rod 324 can move synchronously with the worm.

[0071] Such as Figures 1 to 3As shown, in some embodiments, the air conditioning circulation system further includes a heater 500 and a blower 600. It should be noted that the heater 500 can be, for example, an electric heating device based on the characteristics of a positive temperature coefficient (PTC) material, such as a PTC heater 500. The heater 500 can also be a heating device such as electric heating or fluid heating. The heater 500 is located in the cavity 100. The air inlet ends of the heater 500 are respectively communicated with the first air inlet 110 and the second air inlet 120, and the air outlet end of the heater 500 is communicated with the air outlet 130. The blower 600 is located between the heater 500 and the air outlet 130. The air flow sequentially passes through the heater 500, the blower 600 and the air outlet 130 and flows into the cockpit. It should be understood that the gas in the cavity 100 can be heated by the heater 500 and then blown to the air outlet 130 by the blower 600 and then flow into the cockpit. It should be noted that the heater 500 and the blower 600 can be electrically connected to the controller 400 respectively.

[0072] As Figure 6 As shown, in a third aspect, an embodiment of the present application further provides a control method for an air conditioning circulation system. The control method for the air conditioning circulation system is used to control the air conditioning circulation system described in any one of the first aspects of the present application. The control method for the air conditioning circulation system can be executed by the controller 400 in the vehicle, for example, by the vehicle's vehicle controller 400. The control method for the air conditioning circulation system includes the following steps 101 to step 103.

[0073] In step 101, the controller 400 acquires a first temperature and a second temperature.

[0074] Wherein, the first temperature is the dew point temperature in the vehicle compartment, and the second temperature is the outer surface temperature of the window. In some embodiments, a first temperature sensor is installed on the window. The first temperature sensor is electrically connected to the controller 400. The first temperature sensor is used to detect the outer surface temperature of the window, that is, the second temperature. In other embodiments, a second temperature sensor is installed outside the vehicle. The second temperature sensor is electrically connected to the controller 400. The second temperature sensor is used to detect the ambient temperature of the vehicle. It should be noted that when the vehicle is not equipped with a first temperature sensor and the window is not heated, the second temperature is the ambient temperature detected by the second temperature sensor. It should be noted that the controller 400 can obtain the second temperature from the first temperature sensor or the second temperature sensor, so as to more accurately determine the temperature of the outer surface of the vehicle window and provide a more accurate basis for subsequent adjustment of the position of the rotating door 200.

[0075] In step 102, the controller 400 generates a first mixed air control command in response to the first temperature being greater than the second temperature.

[0076] In step 103, the controller 400 controls the rotary door 200 to rotate to the first position based on the first air mixing control instruction, and controls the air intake volume of the third air inlet 310 to be the first target air volume.

[0077] It should be noted that the controller 400 can control the driving motor 321 to rotate, and then drive the blade 340 to rotate through the connecting rod 324 to adjust the air intake volume of the third air inlet 310.

[0078] It can be understood that when the first temperature is greater than the second temperature, fog is likely to form inside the window. By using the control method of the air-conditioning circulation system provided in the embodiment of the present application, the rotary door 200 can be automatically rotated to the first position, so that the air-conditioning circulation system can be in the air mixing mode, enabling the air inside and outside the vehicle to be automatically exchanged in a timely manner, avoiding fogging inside the window, and improving driving safety. Moreover, compared with the external circulation mode, since the temperature inside the cavity 100 will not be too low in the air mixing mode, the power of the heater 500 does not need to be too high to raise the temperature inside the cavity 100 to a suitable temperature, thus saving more energy.

[0079] Such as Figure 7 and Figure 8 As shown, the embodiment of the present application also provides a control method for an air-conditioning circulation system. The control method for the air-conditioning circulation system is used to control the air-conditioning circulation system described in any one of the first aspects of the embodiments of the present application. The control method for the air-conditioning circulation system can be executed by the controller 400 in the vehicle, for example, executed by the vehicle's vehicle controller 400. The control method for the air-conditioning circulation system includes the following steps 201 to step 207.

[0080] In step 201, the controller 400 obtains the first temperature and the second temperature.

[0081] Among them, the first temperature is the dew point temperature inside the vehicle compartment, and the second temperature is the outer surface temperature of the window. It should be noted that step 201 is the same as step 101, so the embodiments of the present application will not repeat it here.

[0082] In some embodiments, the control method for the air-conditioning circulation system further includes: the controller 400 determines the first temperature based on the external environment temperature, external environment humidity, current vehicle speed, and the number of seated passengers inside the vehicle. It should be noted that since the first temperature is determined by combining the above multiple parameters, the value of the first temperature can be more accurate.

[0083] In some other embodiments, the control method of the air-conditioning circulation system further includes: the controller 400 determines a first temperature based on the outside vehicle environment temperature, the outside vehicle environment humidity, the light irradiance, the current vehicle speed, and the number of seated persons in the vehicle. In this way, the accuracy of the first temperature can be further improved.

[0084] It should be noted that the outside vehicle environment temperature, the outside vehicle environment humidity, the light irradiance, and the current vehicle speed can be measured by corresponding sensors respectively, and the sensors corresponding to each parameter can send the measured data to the controller 400. In some embodiments, the current vehicle speed can be the average vehicle speed within a preset time, so as to avoid the influence of the speed when the vehicle suddenly accelerates or brakes on the accuracy of the first temperature.

[0085] In some embodiments, the control method of the air-conditioning circulation system further includes: the controller 400 determines a first temperature based on the inside vehicle temperature and the inside vehicle humidity. Among them, the inside vehicle temperature is measured based on a temperature sensor installed inside the vehicle, and the inside vehicle humidity is measured based on a humidity sensor installed inside the vehicle.

[0086] In some embodiments, an image collector is installed inside the vehicle, and the image collector is used to photograph the seat area. The controller 400 determines the number of seated persons based on the image taken by the image collector. Thereby, the accuracy of determining the number of seated persons can be improved, and further the accuracy of the first temperature can be improved.

[0087] In step 202, the controller 400 generates a first mixed-air control instruction in response to the first temperature being greater than the second temperature.

[0088] In step 203, the controller 400 controls the rotating door 200 to rotate to the first position based on the first mixed-air control instruction, and controls the air intake volume of the third air inlet 310 to be the first target air volume.

[0089] It should be noted that when the first temperature is greater than the second temperature, the inside of the window is likely to fog up. By adopting the control method of the air-conditioning circulation system provided by the embodiments of the present application, the rotating door 200 can be automatically rotated to the first position, so that the air-conditioning circulation system can be in the mixed-air mode, and the air inside and outside the vehicle can be automatically exchanged in time, so as to avoid fogging inside the window and improve driving safety. And, compared with the external circulation mode, it can also save more energy.

[0090] In some embodiments, the controller 400 controls the driving motor 321 to drive the blade 340 to rotate to the target angle based on the first mixed-air control instruction, so that the air intake volume of the third air inlet 310 formed between two adjacent blades 340 is the first target air volume.

[0091] In some embodiments, when the first temperature is greater than the second temperature, and the difference between the first temperature and the second temperature is greater than a first value, the controller 400 controls the rotating door 200 to rotate to a second position closing the second air inlet 120, as Figure 2 shown, and controls the third air inlet 310 to a second target air volume, where the second target air volume is the maximum air volume allowed to enter through the third air inlet 310. With such a setting, when the humidity inside the vehicle is too high, it can ensure gas exchange between the inside and outside of the vehicle, so as to reduce the humidity inside the vehicle in a short time, thereby avoiding serious fogging on the window and seriously affecting driving safety.

[0092] In step 204, the controller 400 obtains the current vehicle speed.

[0093] In step 205, in response to the current vehicle speed exceeding a first preset vehicle speed, the controller 400 controls the rotating door 200 to rotate towards the second air inlet 120 to the second position.

[0094] It should be noted that by adopting steps 204 to 205, when the vehicle speed is too high, the second air inlet 120 can be automatically closed, so as to avoid a large amount of external cold air entering the cavity 100 through the third air inlet 310 and the first air inlet 110 from directly pouring into the cockpit through the second air inlet 120, and thus can avoid the phenomenon of cold air leakage inside the vehicle, improving the thermal comfort of the passengers inside the vehicle.

[0095] In step 206, the controller 400 obtains the current vehicle speed.

[0096] In step 207, in response to the current vehicle speed exceeding the first preset vehicle speed, the controller 400 adjusts the air intake volume of the third air inlet 310 to the second target air volume.

[0097] The second target air volume is less than the first target air volume. It should be noted that by adopting steps 206 to 207, when the vehicle speed is too high, the flow rate from the third air inlet 310 to the first air inlet 110 can be automatically reduced, that is, the flow rate of external air entering the cavity 100 through the first air inlet 110 can be reduced, so as to prevent a large amount of external cold air from directly pouring into the cockpit through the second air inlet 120, thereby avoiding the phenomenon of cold air leakage inside the vehicle and improving the thermal comfort of the passengers inside the vehicle.

[0098] It should be noted that steps 204 to 205 are a method for preventing cold air leakage into the vehicle when in a cold environment and at a high vehicle speed. Steps 206 to 207 are another method for preventing cold air leakage into the vehicle when in a cold environment and at a high vehicle speed. The above two methods can be executed simultaneously or separately. It can be understood that by using the control method of the air conditioning circulation system provided in the embodiments of the present application, when the vehicle is in a cold environment and the vehicle speed is too high, the comfort of the passengers in the vehicle can be improved by automatically adjusting the position of the rotating door 200.

[0099] In some embodiments, the control method of the air conditioning circulation system further includes: the controller 400 controls the power of the blower 600 to be increased to a first target power in response to the current vehicle speed exceeding a first preset vehicle speed. It should be noted that when the vehicle speed is too high, the gas flow velocity at the first air inlet 110 is relatively fast. By increasing the power of the blower 600, the gas flow velocity in the cavity 100 can be accelerated, avoiding the situation that a large amount of cold air accumulates in the cavity 100 and directly pours into the cockpit from the second air inlet 120, and further improving the thermal comfort of the passengers in the vehicle.

[0100] In some embodiments, the control method of the air conditioning circulation system further includes: the controller 400 generates a second mixed air control instruction in response to the first temperature being less than the second temperature. The controller 400 controls the rotating door 200 to rotate to a first position and controls the air intake volume of the third air inlet 310 to be a third target air intake volume based on the second mixed air control instruction. It should be noted that when the first temperature is less than the second temperature, it is not easy for the inner side of the window to fog up. By rotating the rotating door 200 to the first position, the air inside and outside the vehicle can be exchanged, which can not only prevent the window from fogging up but also allow the fresh air outside the vehicle to flow into the vehicle, thereby improving the air freshness inside the vehicle.

[0101] As Figure 3 shown, in some embodiments, the control method of the air conditioning circulation system further includes: the controller 400 controls the rotating door 200 to rotate to a third position closing the first air inlet 110 and closes the third air inlet 310 in response to the difference between the second temperature and the first temperature being greater than a second value. It should be noted that when the difference between the second temperature and the first temperature is greater than the second value, the window will basically not fog up. Therefore, closing the channel for external air flow to enter and switching to the internal circulation mode can greatly save energy consumption and improve the endurance of the vehicle.

[0102] It should be noted that when the rotating door 200 is in the first position, the ratio of the air intake flow rates from the first air inlets 110 on both sides of the rotating door 200 and the air intake flow rate from the second air inlet 120, as well as the air intake volume of the third air inlet 310, are all determined based on the difference between the first temperature and the second temperature and the current vehicle speed. Thus, it is possible to accurately and automatically adjust the ratio of the flow rates of the gases inside and outside the cavity 100 and the gases entering from the driver's cab, thereby enabling the vehicle to achieve the best energy-saving effect.

[0103] In summary, by adopting the control method of the air-conditioning circulation system provided in the embodiments of the present application, it is possible to automatically and accurately adjust the position of the rotating door 200 in a low-temperature environment, which can not only prevent the window from fogging and save energy consumption, but also prevent the phenomenon of cold air leaking into the driver's cab when the vehicle speed is too high, improving the comfort of the passengers in the vehicle. It should be noted that by adopting the technical solution provided in the embodiments of the present application, it is possible to achieve an energy-saving effect of 10%-20% without affecting thermal comfort and preventing the windshield from fogging, and since there is no need to make major modifications to the original structure inside the cavity, the cost is relatively low.

[0104] In a third aspect, the embodiments of the present application further provide a vehicle, which has a controller 400, such as a vehicle controller 400. The controller 400 is used to execute the control method of the air-conditioning circulation system described in any one of the embodiments of the second aspect of the present application above, so as to ensure that in a low-temperature environment, the vehicle can not only prevent the window from fogging and save energy consumption, but also prevent the phenomenon of cold air leaking into the driver's cab when the vehicle speed is too high, improving the comfort of the passengers in the vehicle.

[0105] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" means two or more, unless otherwise clearly defined.

[0106] After considering the specification and practicing the present application disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only to be considered as exemplary.

[0107] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. An air-conditioning circulation system, characterized in that, The air-conditioning circulation system includes a cavity (100), a rotating door (200), a grille assembly (300), and a controller (400); The cavity (100) has a first air inlet (110), a second air inlet (120), and an air outlet (130). The second air inlet (120) and the air outlet (130) are respectively in communication with the inside of the cockpit; One end of the rotating door (200) is rotatably connected to the inner wall of the cavity (100); The grille assembly (300) is located outside the cavity (100). The grille assembly (300) has a third air inlet (310), and the third air inlet (310) is in communication with the first air inlet (110); The controller (400) is electrically connected between the grille assembly (300) and the rotating door (200). The controller (400) is configured to control the rotating door (200) to rotate to a first position where the first air inlet (110) and the second air inlet (120) are opened, and to control the air intake volume of the third air inlet (310) to be a first target air volume.

2. The air-conditioning circulation system according to claim 1, wherein The grille assembly (300) includes a driving member (320), a bearing frame (330), and a plurality of blades (340); The bearing frame (330) includes a first bracket (331) and a second bracket (332) arranged oppositely; Both ends of each blade (340) are respectively rotatably connected to the first bracket (331) and the second bracket (332). The plurality of blades (340) are arranged side by side and in parallel, and the third air inlet (310) is formed between adjacent two blades (340); The driving member (320) is electrically connected to the controller (400), and the driving member (320) is rotatably connected to the blade (340) to adjust the opening degree of the third air inlet (310).

3. The air-conditioning circulation system according to claim 2, wherein, The driving member (320) includes a driving motor (321), a first transmission member (322), a second transmission member (323), and a plurality of connecting rods (324); The driving motor (321) has an output shaft (325); The first transmission member (322) is sleeved on the output shaft (325); The second transmission member (323) is arranged parallel to the output shaft (325). The first transmission member (322) meshes with the second transmission member (323), and the first transmission member (322) drives the second transmission member (323) to reciprocate axially; One end of the connecting rod (324) is connected to the second transmission member (323), and the other end is rotatably connected to the corresponding blade (340).

4. The air-conditioning circulation system according to claim 1, wherein The air-conditioning circulation system further includes a heater (500) and a blower (600); The heater (500) is located inside the cavity (100). The air inlet end of the heater (500) is respectively in communication with the first air inlet (110) and the second air inlet (120), and the air outlet end of the heater (500) is in communication with the air outlet (130); The blower (600) is located between the heater (500) and the air outlet (130), and the air flow flows into the cockpit successively through the heater (500), the blower (600) and the air outlet (130).

5. A control method for an air-conditioning circulation system, characterized in that, The method is used to control the air-conditioning circulation system according to any one of claims 1 to 4, and the method includes: Obtaining a first temperature and a second temperature, wherein the first temperature is the dew point temperature inside the vehicle cabin, and the second temperature is the outer surface temperature of the vehicle window; In response to the first temperature being greater than the second temperature, generating a first mixed air control command; Based on the first mixed air control command, controlling the rotating door (200) to rotate to the first position, and controlling the air intake volume of the third air inlet (310) to be a first target air volume.

6. The control method of the air-conditioning circulation system according to claim 5, wherein, The method further includes: Obtaining the current vehicle speed; In response to the current vehicle speed exceeding a first preset vehicle speed, controlling the rotating door (200) to rotate towards the second air inlet (120) to the second position.

7. The control method of the air-conditioning circulation system according to claim 5, wherein The method further includes: Obtaining the current vehicle speed; In response to the current vehicle speed exceeding the first preset vehicle speed, adjusting the air intake volume of the third air inlet (310) to a second target air volume, wherein the second target air volume is less than the first target air volume.

8. The control method of the air-conditioning circulation system according to claim 6 or 7, characterized in that The method further includes: In response to the current vehicle speed exceeding the first preset vehicle speed, controlling to increase the power of the blower (600) to a first target power.

9. The control method of the air-conditioning circulation system according to claim 5, characterized in that The method further includes: Determining the first temperature based on the outside ambient temperature, the outside ambient humidity, the current vehicle speed and the number of seated passengers inside the vehicle.

10. A vehicle, characterized in that, The vehicle has a controller (400), and the controller (400) is used to execute the control method of the air-conditioning circulation system according to any one of claims 5 to 9.

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