Active fresh air system suitable for vehicle air conditioner and control method of active fresh air system

Abstract

The active fresh air system comprises a condenser assembly, a condensation fan, an evaporator assembly and an evaporation fan, in the vehicle air conditioner, an air conditioner cavity where the evaporator assembly and the evaporation fan are located is an air conditioner evaporation bin, and a ventilation opening is formed in the tail end of a shell in the air conditioner evaporation bin; a rear-mounted active air suction assembly is installed on the outer side of the tail end, where the ventilation opening is located, of the shell, and the air volume entering an air conditioner evaporation bin is adjusted by controlling the operation speed of an air suction fan in the rear-mounted active air suction assembly. A traditional air conditioning system is improved, the full fresh air air conditioning system is provided, the quality of air in a bus can be intelligently detected, the working state of the fresh air exchange system is controlled according to the detection result, flexible and rapid air exchange of air inside and outside the bus is achieved, and the purposes of rapidly improving the quality of the air in the bus and improving the riding comfort of passengers are achieved.

Description

Technical Field

[0001] The invention belongs to the field of passenger car air conditioning, and in particular relates to an active fresh air system suitable for vehicle air conditioning and a control method thereof. Background Art

[0002] The interior environment of a passenger car is one of the important factors that affect the driver's safe and stable driving, and it is also a key factor that affects the comfort of passengers. When the vehicle is running for a long time, the air quality in the car will gradually decrease, and the concentration of gases such as CO2 and CO will increase. When affected by special factors, harmful elements such as bacteria and odors will increase in the car. On the one hand, it is not conducive to the driver's physical and mental health, and it is not conducive to the driver's safe and stable operation of the vehicle. On the other hand, it is not conducive to the physical and mental health and mature comfort of passengers. As one of the important means of transportation in my country, improving the interior environment and enhancing the comfort of riding is one of the main means to improve the market competitiveness of my country's bus industry, and it is also an important measure to realize the development of the bus industry towards intelligence and high-end.

[0003] Air freshness is an important factor affecting people's physical and mental health, and is also an important indicator for evaluating bus technology. Long-term operation of buses will lead to a decrease in the air quality inside the bus, affecting the physical and mental health and comfort of passengers.

[0004] In order to improve the freshness of the air inside the bus, there is currently no mature fresh air air conditioning system product on the Chinese market, which cannot realize the active, flexible and rapid exchange of air inside and outside the car. In addition, the existing technical products use the return air channel to realize the interaction of air inside and outside the car. However, due to the structural limitations of the car air conditioner, most of the air can only be circulated internally, and cannot be quickly exchanged and merged with the air outside the car on a large scale. Therefore, long-term operation will lead to a decrease in the air quality inside the car.

[0005] Traditional air conditioners rely on the negative pressure principle to draw outside air into the car to achieve small-volume ventilation. The amount of ventilation is related to the size of the return air vent and cannot be adjusted according to actual conditions, which results in major drawbacks. Summary of the invention

[0006] The technical problem to be solved by the present invention is: how to achieve gas exchange inside and outside the car and improve the air quality inside the car. Therefore, an active fresh air system suitable for vehicle air conditioning and a control method thereof are proposed, which can flexibly control the operating status of the air conditioner in conjunction with a detection control system.

[0007] To achieve the above object, the present invention is achieved through the following technical solutions: An active fresh air system suitable for a vehicle air conditioner comprises a condenser assembly, a condensing fan, an evaporator assembly and an evaporating fan. In the vehicle air conditioner, the air conditioning chamber where the evaporator assembly and the evaporating fan are located is an air conditioning evaporation chamber, a vent is provided at the end of a shell inside the air conditioning evaporation chamber, and a rear active air suction assembly is installed on the outside of the end of the shell where the vent is located. The air volume entering the air conditioning evaporation chamber is adjusted by controlling the operating speed of the air suction fan inside the rear active air suction assembly.

[0008] The rear active air suction component includes a fan fixing frame and a fan; wherein the fan fixing frame is a semi-open structure, which serves as an intermediate medium to connect the fan and the air-conditioning casing in series so that the fan outlet faces the return air outlet of the traditional air conditioner.

[0009] A circular hole is opened on one side of the fan fixing frame, and a coil is installed in the circular hole; through holes are opened on both sides of the fan fixing frame and filtering devices are installed.

[0010] A vent is provided at the front end of the inner shell of the air-conditioning evaporation chamber, and a front active suction component is installed on the outer side of the front end of the shell where the vent is located. The air volume entering the air-conditioning evaporation chamber is adjusted by controlling the operating speed of the suction fan inside the front active suction component.

[0011] A fresh air component is installed in the middle of the evaporator shell. There are multiple air doors inside the fresh air component. The amount of fresh air entering the vehicle is controlled by controlling the opening angle of the air doors.

[0012] The fresh air component includes a fresh air assembly fixed shell, on which at least one damper assembly is installed, and the damper assembly is connected to a micro-rotating motor; the fresh air assembly fixed shell serves as a chassis device to fix the entire fresh air component at the return air outlet inside the air-conditioning evaporation chamber, so that the multiple damper assemblies on the fresh air component are facing the return air outlet; the motor shaft of the micro-rotating motor is connected to the adapter and extends to the outside of the motor, and both sides of the damper assembly are connected to the adapter, wherein one side of the adapter is connected to the micro-rotating motor, serving as an intermediate force transmission component to provide power for the rotation of the damper assembly; the other side of the adapter is connected to the adapter fixing frame, and the adapter fixing frame can be fixed to the fresh air assembly fixed shell by fixing bolts.

[0013] A heat-insulating plate is pasted on the fixed shell of the fresh air assembly.

[0014] A control method using the above system comprises the following steps: Step 1: When the vehicle air conditioner is operating normally, the driver can turn on the fresh air mode according to his own situation, including manual and automatic; Step 2: The sensor detects the air quality, actively turns on the fresh air mode, and detects whether the air quality reaches the preset value; Step 3: When the average value of the detected air quality is ≥ the preset value, it means that the air freshness in the car meets the standard and the active fresh air system does not start; when the air quality is < the preset value, it means that the air freshness in the car does not meet the standard. At this time, the active fresh air system can start to work, allowing fresh air outside the car to enter the car, improve the air quality in the car, and improve the riding comfort of passengers. When the sensor detects that the air quality in the car meets the standard, the active fresh air system can be automatically turned off.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention improves on the traditional air-conditioning system and proposes a fresh air air-conditioning system, which can intelligently detect the air quality in the car, control the working state of the fresh air exchange system according to the detection results, and realize flexible and rapid ventilation of the air inside and outside the bus, so as to achieve the purpose of quickly improving the air quality in the car and improving the riding comfort of passengers.

[0016] 1. An active fresh air module is added inside the air conditioner, mainly to control the size of the damper at the return air outlet to achieve the amount of fresh air entering.

[0017] 2. Add dampers, fans and other devices inside the air conditioner casing to achieve active air suction and control the amount of air entering the air conditioner.

[0018] 3. Individual control of the return air damper and the air inlet fan in the fresh air assembly can achieve flexible adjustment of different wind speeds to meet different working conditions.

[0019] 4. Reasonable arrangement of sensors in the vehicle can realize real-time monitoring of temperature, humidity and air freshness and jointly control the active fresh air, thus improving the intelligence level of vehicle air conditioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the active fresh air system of the present invention; Figure 2 This is a front view of the rear active air suction component; Figure 3 It is a side view of the rear active air suction component; Figure 4 is a three-dimensional diagram of a rear active air suction component; Figure 5 This is the main view of the new air component; Figure 6 It is a side view of the fresh air component; Figure 7 is a flow chart of the control method of the present invention; Figure 8 This is a schematic diagram of the control status matching of the multi-speed fresh air system. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] like Figure 1 As shown, an active fresh air system suitable for vehicle air conditioning includes important components such as a condenser assembly 1, a condensing fan 2, an evaporator assembly 4, and an evaporating fan 5. Among them, the evaporator assembly 4 generates cold air and sucks the cold air generated by the evaporator assembly into the air duct through the evaporating fan 5 and transmits it to the vehicle for cooling. The condensing fan 2 blows away the heat generated by the condenser assembly 1 to accelerate the heat dissipation. Traditional air exchange relies on the negative pressure principle to suck the external gas into the air conditioner through the gap and enter the whole vehicle through the return air port to achieve a trace amount of ventilation. An electric damper can also be added at the end of the shell to control the amount of fresh air sucked into the vehicle by controlling the angle at which the damper is opened. Although the existing technology relies on the negative pressure principle to achieve fresh air exchange, the amount of fresh air exchange is small, which cannot meet the needs of users and cannot achieve the purpose of significantly and quickly improving the air quality in the vehicle. Therefore, the present invention improves on the traditional air conditioning technology, adds an active suction component and / or a new air component, and achieves fast and efficient fresh air exchange.

[0024] exist Figure 1 In the vehicle air conditioner, the air conditioning chamber where the evaporator assembly 4 and the evaporating fan 5 are located is an air conditioning evaporation chamber, a vent is provided at the end of the shell inside the air conditioning evaporation chamber, and a rear active suction assembly 7 is installed on the outer side of the shell end where the vent is located. By controlling the operating speed of the suction fan inside the rear active suction assembly 7, the air volume entering the air conditioning evaporation chamber is adjusted.

[0025] Preferably, a vent is opened at the front end of the inner shell of the air-conditioning evaporation chamber, and a front active suction component 3 is installed on the outer side of the front end of the shell where the vent is located. By controlling the operating speed of the suction fan inside the front active suction component 3, the air volume entering the air-conditioning evaporation chamber is adjusted.

[0026] Furthermore, a fresh air component 6 is installed in the middle of the evaporation bin shell, and a plurality of air doors are arranged inside the fresh air component 6. The amount of fresh air entering the interior of the vehicle is controlled by controlling the opening angle of the air doors.

[0027] In this way, the present invention adopts the coordinated use of the rear active suction component 7, the front active suction component 4 and the fresh air component 6, which can flexibly and actively adjust the speed and volume of fresh air exchange, which is faster and more efficient than the traditional negative pressure suction principle.

[0028] like Figure 2 , Figure 3 , Figure 4 As shown, the rear active air suction component 7 includes a fan fixing frame 71, a fan 72, a fixing bolt 73, a coil 74 and a filter device 75. Among them, the fan fixing frame 71 is a semi-open structure, which serves as an intermediate medium to connect the fan 72 and the air conditioner housing in series. On the one hand, it is convenient for the fan 72 to be installed and fixed inside the fan fixing frame 71 to avoid water seepage of the fan 72, and also to avoid the fan 72 being exposed to the outside for a long time to affect the performance and quality of the fan. On the other hand, the fan fixing frame 71 can be used to install the entire rear active air suction component 7 at the end of the air conditioner as a whole, so that the fan outlet is facing the return air outlet of the traditional air conditioner, so that the outside wind can enter the air conditioner, and the bus and air conditioner can actively take in fresh air. Since the fan control requires the coordination of the wiring harness, a circular hole is opened on one side of the fan fixing frame 71, and a coil 74 is installed in the circular hole. The coil 74 is convenient for the fan control wiring harness. In addition. There are many impurities in the outside air. In order to ensure that the air entering the car has a high degree of cleanliness, through holes are opened on both sides of the fan fixing frame 71 and filter devices 75 are installed. The installation form can be glued, bolted, welded, slideways and other fixing methods. At the same time, a filter device can also be added synchronously at the back of the fan fixing frame 71 corresponding to the fan outlet (not marked in the drawing). When the fan 72 is working, the outside air can be sucked into the car, and the outside air conditioning is filtered once through the filter device 75. The filter device at the fan outlet can achieve secondary filtration, further improving the freshness of the air entering the car.

[0029] The structure of the front active suction assembly 3 is the same as that of the rear active suction assembly 7. However, for the front active suction assembly 3, since it is located inside the evaporation bin, the suction fan can be directly fixed at the vent by bolt connection, so that the external gas can be efficiently and quickly sucked into the vehicle, realizing the active suction function. At the same time, in order to ensure the cleanliness of the fresh air, a filtering device is added at the front vent, which can be installed between the housing and the fan, or installed at the vent outside the housing, for filtering purposes.

[0030] like Figure 5 , Figure 6As shown, the fresh air assembly 6 includes a fresh air assembly fixed housing 61, on which at least one damper assembly 64 is installed, and the damper assembly 64 is connected to a micro-rotating motor 62. The fresh air assembly fixed housing 61 as a chassis device can fix the entire fresh air assembly 6 at the return air outlet inside the air conditioning evaporation chamber, so that the multiple damper assemblies 64 on the fresh air assembly face the return air outlet, so that the newly entered fresh air can be directly blown to the passenger area in the car through the air duct, and the purpose of actively introducing fresh air is achieved, thereby improving the freshness of the air in the car. The operating power of the damper assembly 64 comes from the micro-rotating motor 62, and the motor shaft of the micro-rotating motor 62 is connected to the adapter 63 and extends to the outside of the motor. The damper assembly 64 is connected to the adapter 63 on both sides by bolt connection (not limited to this connection method), wherein the adapter 63 on one side is connected to the micro rotary motor 62, which serves as an intermediate force transmission component to provide power for the rotation of the damper assembly 64; the adapter 63 on the other side is connected to the adapter fixing frame 65, and the adapter fixing frame 65 can be connected and fixed to the fresh air assembly fixed housing 61 by fixing bolts 66, providing stable support for the rotation of the adapter 63 and the damper assembly 64. In addition, in order to ensure that the cold air is not wasted, an insulation board (not marked in the figure) is attached to the fresh air assembly fixed housing 61, which plays a good insulation role. For different models, the number of damper assemblies inside the fresh air assembly is not unique and can be flexibly changed.

[0031] In order to improve the intelligence level of the whole vehicle, air quality detection sensors are added at appropriate positions in the air-conditioned vehicle to monitor the air quality in the vehicle in real time. According to the relevant needs of relevant customers, the optimal value is set for the sensor, and the sensors at each position are monitored in real time. The detection data is fed back to the main control unit, which processes, analyzes and judges the detection feedback data.

[0032] like Figure 7 As shown, a control method for an active fresh air system for a vehicle air conditioner comprises the following steps: Step 1: When the vehicle air conditioner is operating normally, the driver can turn on the fresh air mode according to his own situation, including manual and automatic. In the manual mode, after the sensor detects an alarm, the driver needs to control the active fresh air system alone to open the suction fan and electric damper to achieve fresh air. In the automatic mode, the suction fan and electric damper are automatically turned on according to the sensor detection results, without manual operation.

[0033] Step 2: The sensor detects the air quality, actively turns on the fresh air mode, and detects whether the air quality reaches the preset value; Step 3: When the average value of the detected air quality is ≥ the preset value, it means that the air freshness in the car meets the standard and the active fresh air system does not start; when the air quality is < the preset value, it means that the air freshness in the car does not meet the standard. At this time, the active fresh air system can start to work, allowing fresh air outside the car to enter the car, improve the air quality in the car, and improve the riding comfort of passengers. When the sensor detects that the air quality in the car meets the standard, the active fresh air system can be automatically turned off.

[0034] Due to the ever-changing weather and the inability to accurately identify the weather and other climates in different regions, the manual and automatic control modes of the active fresh air module are added to the vehicle control system, and the driver can flexibly choose according to his own situation and the local climate. After the vehicle is started, the air detection sensor starts working synchronously and monitors the air quality in the car in real time. When the driver does not want to turn on the active fresh air function, the manual opening mode of the fresh air component can be selected. At this time, the driver does not touch the active fresh air switch, and the active fresh air is in the initial state. When the driver wants to turn on the active fresh air function, he can manually touch the switch to start the active fresh air module to let in fresh air. At the same time, the driver can also directly select the automatic mode when driving, and the active fresh air module and the air detection sensor are interconnected to realize the automatic opening or closing function of the automatic active fresh air module. In addition, the running speed of the fan in the active fresh air is adjustable, and the driver can adjust it manually or automatically through the active unit to change the ventilation efficiency.

[0035] Note: The installation position and quantity of the active air suction components are not unique, nor are they limited to the positions in the patent specification and drawings. The position and quantity of the active fresh air modules can be flexibly adjusted according to different vehicle models to increase the fresh air intake rate.

[0036] like Figure 8 As shown in the figure, for the preset value of the sensor, it can be set to multiple gears, such as 30%A, 50%A, 70%A, A, etc. For the suction fan speed, it can be divided into different gears such as 1, 3, 5, 7, etc. For the electric damper opening angle, it can be divided into 30%, 50%, 70%, 100%, etc. Different gears correspond to different gas concentrations. At this time, the opening number and rate of the front and rear suction fans and the opening number and opening angle of the electric damper can be realized according to the gear. The integration of intelligent algorithms can optimize and analyze its matching measures. How to match can be set according to the actual situation of different enterprises, so as to achieve the best state, reduce electricity costs, and extend the service life of electrical components.

[0037] Compared with the existing fresh air door control technology, the fresh air system of the present invention can control the amount of fresh air entering the vehicle by controlling the operating status of the front and rear suction fans and the opening angle of the fresh air door assembly. It has a simple structure and high fresh air exchange efficiency and flexibility. At the same time, when used in conjunction with the detection and control system, it can realize intelligent joint control with the entire vehicle and complete functions such as automatic detection and fresh air exchange.

[0038] Compared with the traditional passenger car air conditioner, the present invention adds an active fresh air module, which can improve the ventilation efficiency and air freshness, improve the air quality in the car efficiently and quickly, and improve the riding comfort of passengers. On the other hand, the active fresh air module has a simple structure and is easy to install and maintain. Specifically, 1. The active fresh air module is equipped with a fan and a double filter device. While the fan is sucking air, the filter devices on both sides and the filter devices at the air outlet can be used to double filter the outside air to ensure the freshness and purity of the fresh air.

[0039] 2. Multiple air quality detection sensors are installed in the car, which can detect the air quality in the car in real time. And they can be interconnected with the active fresh air module and the vehicle control module to achieve active fresh air automatic / manual control mode.

[0040] 3. The fan speed in the active fresh air module is adjustable, including automatic adjustment and manual adjustment, so as to control the rate of fresh air intake.

[0041] 4. The installation position and quantity of the active fresh air module are not unique, nor are they limited to the positions in the patent specification and drawings. The position and quantity of the active fresh air module can be flexibly adjusted according to different vehicle models to increase the rate of fresh air intake.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. An active fresh air system suitable for a vehicle air conditioner, comprising a condenser assembly (1), a condensing fan (2), an evaporator assembly (4) and an evaporating fan (5), characterized in that: In a vehicle air conditioner, an air conditioning chamber where an evaporator assembly (4) and an evaporation fan (5) are located is an air conditioning evaporation chamber, a vent is provided at the end of a shell inside the air conditioning evaporation chamber, and a rear active air suction assembly (7) is installed outside the end of the shell where the vent is located. The air volume entering the air conditioning evaporation chamber is adjusted by controlling the operating speed of the air suction fan inside the rear active air suction assembly (7).

2. The active fresh air system suitable for vehicle air conditioning according to claim 1, characterized in that: The rear active air suction component (7) comprises a fan fixing frame (71) and a fan (72); wherein the fan fixing frame (71) is a semi-open structure, and serves as an intermediate medium to connect the fan (72) and the air conditioner housing in series, so that the fan outlet faces the return air outlet of the conventional air conditioner.

3. The active fresh air system suitable for vehicle air conditioning according to claim 2, characterized in that: A circular hole is provided on one side of the fan fixing frame (71), and a coil (74) is installed in the circular hole; through holes are provided on both sides of the fan fixing frame (71) and a filter device (75) is installed therein.

4. The active fresh air system suitable for vehicle air conditioning according to claim 1, characterized in that: A vent is provided at the front end of the shell inside the air conditioner evaporation chamber, and a front active air suction component (3) is installed outside the front end of the shell where the vent is located. The air volume entering the air conditioner evaporation chamber is adjusted by controlling the operating speed of the air suction fan inside the front active air suction component (3).

5. The active fresh air system suitable for vehicle air conditioning according to claim 1, characterized in that: A fresh air component (6) is installed in the middle of the evaporation chamber shell, and a plurality of air doors are arranged inside the fresh air component (6). The amount of fresh air entering the interior of the vehicle is controlled by controlling the opening angle of the air doors.

6. The active fresh air system suitable for vehicle air conditioning according to claim 5, characterized in that: The fresh air assembly (6) comprises a fresh air assembly fixed housing (61), on which at least one damper assembly (64) is mounted, and the damper assembly (64) is connected to a micro-rotating motor (62); the fresh air assembly fixed housing (61) serves as a chassis device to fix the entire fresh air assembly (6) at the return air outlet inside the air conditioner evaporation chamber, so that the multiple damper assemblies (64) on the fresh air assembly face the return air outlet; the motor shaft of the micro-rotating motor (62) is connected to an adapter (63) and extends to the outside of the motor, and both sides of the damper assembly (64) are connected to the adapter (63), wherein one side of the adapter (63) is connected to the micro-rotating motor (62) and serves as an intermediate force transmission component to provide power for the damper assembly (64) to rotate; the other side of the adapter (63) is connected to an adapter fixing frame (65), and the adapter fixing frame (65) can be connected and fixed to the fresh air assembly fixed housing (61) via fixing bolts (66).

7. The active fresh air system suitable for vehicle air conditioning according to claim 6, characterized in that: A heat-insulating plate is adhered to the fresh air assembly fixed housing (61).

8. A control method using the system according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: When the vehicle air conditioner is operating normally, the driver can turn on the fresh air mode according to his own situation, including manual and automatic; Step 2: The sensor detects the air quality, actively turns on the fresh air mode, and detects whether the air quality reaches the preset value; Step 3: When the average value of the detected air quality is ≥ the preset value, it means that the air freshness in the car meets the standard and the active fresh air system does not start; when the air quality is < the preset value, it means that the air freshness in the car does not meet the standard. At this time, the active fresh air system can be started to work, so that fresh air outside the car enters the car, improving the air quality in the car and improving the riding comfort of passengers; When the sensor detects that the air quality in the car meets the standard, the active fresh air system can be automatically shut down.

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