Vehicle air conditioner and control method thereof

Abstract

The present invention provides a vehicle air conditioner and a control method thereof. The vehicle air conditioner includes a housing, a fan, and a heat exchanger. The heat exchanger and the fan are both disposed within the housing. The housing is provided with a front air inlet, a side air inlet, a bottom air inlet, and an air outlet. The airflow direction is opposite to the vehicle's direction of travel. The front air inlet is disposed on the front of the housing, facing the airflow direction. The side air inlet is disposed on the side of the housing, parallel to the airflow direction. The bottom air inlet is disposed on the bottom surface of the housing, and the air outlet is disposed on the top surface of the housing. According to the present invention, the air inlet area can be increased, thereby improving the cooling / heating effect of the vehicle air conditioner, increasing energy efficiency, and reducing energy consumption of the vehicle air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a vehicle air conditioner and a control method thereof. Background Art

[0002] To provide a comfortable ride for drivers and passengers, buses, trucks, and other vehicles without onboard air conditioning often install parking air conditioners. These units are typically located on the roof, side, or rear of the vehicle's cockpit, relying solely on a fan to circulate air and exchange heat.

[0003] The existing outdoor unit heat exchange relies solely on the fan, which has high requirements for the fan, high fan energy consumption, and cannot intelligently adjust the fan speed.

[0004] Since the vehicle air conditioner in the prior art has technical problems such as high energy consumption, the present invention studies and designs a vehicle air conditioner and a control method thereof. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of high energy consumption of vehicle air conditioners in the prior art, thereby providing a vehicle air conditioner and a control method thereof.

[0006] In order to solve the above problems, the present invention provides a vehicle air conditioner, which includes:

[0007] A shell, a fan and a heat exchanger, wherein the heat exchanger and the fan are both arranged inside the shell, and the shell is provided with a front air inlet, a side air inlet, a bottom air inlet and an air outlet, and the air flow direction is opposite to the travel direction of the vehicle. The front air inlet is arranged on the front of the shell, and the front is opposite to the air flow direction. The side air inlet is arranged on the side of the shell, and the side is parallel to the air flow direction. The bottom air inlet is arranged on the bottom surface of the shell, and the air outlet is arranged on the top surface of the shell.

[0008] In some embodiments, the side surface is disposed between the top surface and the bottom surface, and there are two side surfaces, each of which is provided with the side air inlet.

[0009] In some embodiments, a first baffle is provided at the bottom air inlet, the connecting end of the first baffle is connected to the shell, the free end of the first baffle extends outward, the direction from the connecting end of the first baffle to the free end of the first baffle is inclined to the direction of airflow, and the direction from the connecting end of the first baffle to the free end of the first baffle is toward upstream of the direction of airflow.

[0010] In some embodiments, there are multiple first baffles, and the multiple first baffles are arranged at intervals; the direction from the connecting end of the first baffle to the free end of the first baffle is at an angle of 90° to 180° with the airflow direction.

[0011] In some embodiments, a second baffle is provided at the side air inlet, the connecting end of the second baffle is connected to the shell, the free end of the second baffle extends outward, the direction from the connecting end of the second baffle to the free end of the second baffle is inclined to the direction of airflow, and the direction from the connecting end of the second baffle to the free end of the second baffle is toward upstream of the direction of airflow.

[0012] In some embodiments, there are multiple second baffles, and the multiple second baffles are arranged at intervals; the direction from the connecting end of the second baffle to the free end of the second baffle is at an angle of 90° to 180° with the airflow direction.

[0013] In some embodiments, a third baffle is provided at the air outlet, the connecting end of the third baffle is connected to the shell, the free end of the third baffle extends outward, the direction from the connecting end of the third baffle to the free end of the third baffle is inclined to the direction of airflow, and the direction from the connecting end of the third baffle to the free end of the third baffle is toward downstream of the direction of airflow.

[0014] In some embodiments, there are multiple third baffles, and the multiple third baffles are arranged at intervals; the direction from the connecting end of the third baffle to the free end of the third baffle is set at an angle of 90° to 180° with the airflow direction.

[0015] In some embodiments, an air inlet grille is provided at the front air inlet, and a temperature detection device is provided on the refrigerant pipeline connected to the heat exchanger. Along the direction of refrigerant flow, the temperature detection device is provided on the refrigerant pipeline at the outlet end of the heat exchanger.

[0016] The present invention also provides a method for controlling the aforementioned vehicle air conditioner, comprising:

[0017] Detection step: detecting the speed of the vehicle and the windshield of the fan;

[0018] A determination step, determining a relationship between the vehicle speed and a preset vehicle speed, and determining a relationship between the windshield and the preset windshield;

[0019] The control step is as follows: when the vehicle speed is greater than the preset speed and the wind speed is greater than the preset wind speed, the wind speed is controlled to decrease; when the vehicle speed is less than the preset speed and the wind speed is less than the preset wind speed, the wind speed is controlled to increase.

[0020] In some embodiments, three vehicle speeds v1, v2, and v3 are preset, v1>v2>v3, and three fan gears 0, 1, and 2 are preset, according to the speed 2>1>0;

[0021] In the control step, when the vehicle speed v0≤v1 and the current K=2, the current fan speed is controlled to remain unchanged; when the vehicle speed v0≤v1 and the current K≠2, the current fan speed is controlled to be K=2; when the vehicle speed v1<v0≤v2 and the current K=1, the current fan speed is controlled to remain unchanged; when the vehicle speed v1<v0≤v2 and the current K≠1, the current fan speed is controlled to be K=1; when the vehicle speed v2<v0≤v3 and the current K=0, the current fan speed is controlled to remain unchanged; when the vehicle speed v2<v0≤v3 and the current K≠0, the current fan speed is controlled to be K=0; when the vehicle speed v0≥v3, the current fan is controlled to be closed and the wind speed is 0.

[0022] In some embodiments, when a temperature detection device is provided on the refrigerant pipeline connected to the heat exchanger:

[0023] The detecting step detects the refrigerant temperature T2 by the temperature detecting device;

[0024] The determining step further determines the relationship between T2 and the preset temperature T1;

[0025] The control step is as follows: when T2>T1 and the current fan speed K=2, the current fan speed is controlled to remain unchanged; when T2>T1 and the current K≠2, the current fan speed is controlled to be K=K+1, and the fan speed is increased; when T2≤T1 and the current fan speed K≠0, the fan speed is controlled to be K=K-1, and the fan speed is lowered; when T2≤T1 and the current fan speed K=0, the fan speed is controlled to be K=0, and the fan speed is controlled to remain unchanged.

[0026] The vehicle air conditioner and control method thereof provided by the present invention have the following beneficial effects:

[0027] 1. The present invention provides air inlets on the front, side and bottom of the air-conditioning housing, thereby increasing the air inlet area, thereby improving the cooling / heating effect of the vehicle air-conditioning, improving energy efficiency and reducing the energy consumption of the vehicle air-conditioning; and the present invention also provides a first baffle at the bottom air inlet, and the inclination direction of the connection end of the first baffle to its free end faces the upstream of the air flow direction, so that the air flow passing through the bottom air inlet can be effectively guided by the first baffle, and the flow rate of the air flow can be effectively utilized, the energy consumption of the fan can be reduced and the energy efficiency can be improved; the present invention provides a second baffle at the side air inlet, and the connection end of the second baffle to its free end is inclined toward the upstream of the air flow direction. The inclination direction of the end is toward the upstream of the air flow direction, which can enable the air flow to be effectively guided by the second baffle when flowing through the bottom air inlet, and can further effectively utilize the flow velocity of the air flow, reduce the energy consumption of the fan, and improve energy efficiency; the present invention also has a third baffle set at the air outlet, and the direction from the connecting end of the third baffle to the free end of the third baffle is toward the downstream of the air flow direction, which can make the air flow outside the vehicle have a certain wind guiding effect on the outlet air flow through the wind guiding effect of the third baffle, and effectively guide the outlet air by using the guidance, thereby improving the outlet effect, further reducing the energy consumption of the fan, and improving the energy efficiency of the vehicle air conditioner.

[0028] 2. The present invention also, through the association setting of the vehicle speed and the fan damper in the control method, can effectively utilize the airflow speed generated by the vehicle speed to enhance heat exchange when the vehicle speed is high. At this time, the fan speed can be reduced, thereby effectively reducing the energy consumption of the fan and improving energy efficiency; and when the vehicle speed is low, the fan damper is selected to be controlled to increase and the fan speed is increased, thereby effectively ensuring that the heat exchange effect of the heat exchanger is not reduced; the present invention also, through the association setting of the refrigerant temperature and the fan damper in the control method, can selectively control the fan damper to be lowered and the fan speed to be reduced when the refrigerant temperature is low (this indicates that the heat exchange capacity of the heat exchanger is sufficient or excessive), thereby reducing the energy consumption of the fan while ensuring the heat exchange effect of the heat exchanger and improving the energy efficiency of the air conditioner; and when the refrigerant temperature is high (this indicates that the heat exchange capacity of the heat exchanger is insufficient), the fan damper is selectively controlled to be increased and the fan speed is increased, thereby enhancing the heat exchange of the heat exchanger and ensuring the heat exchange effect; therefore, the energy efficiency of the system can be effectively improved, saving energy and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of the vehicle air conditioner of the present invention;

[0030] Figure 2 yes Figure 1 A schematic top view of a vehicle air conditioner;

[0031] Figure 3 yes Figure 1 A schematic diagram of the front structure of a vehicle air conditioner;

[0032] Figure 4 This is the control process of the vehicle air conditioner of the present invention Figure 1 ;

[0033] Figure 5 This is the control process of the vehicle air conditioner of the present invention Figure 2 .

[0034] The reference numerals indicate:

[0035] 1. Housing; 2. Fan; 11. Front air inlet; 12. Side air inlet; 13. Bottom air inlet; 14. Air outlet; 15. Front; 16. Side; 17. Bottom; 18. Top; 31. First baffle; 32. Second baffle; 33. Third baffle; 34. Air inlet grille; 4. Roof. DETAILED DESCRIPTION

[0036] In the description of the present invention, it should be noted that the terms "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying 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.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "in contact," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] like Figure 1-4 As shown, the present invention also provides a vehicle air conditioner (preferably a parking air conditioner), which includes:

[0039] A housing 1, a fan 2, and a heat exchanger are provided. The heat exchanger and the fan 2 are both disposed within the housing 1. The housing 1 is provided with a front air inlet 11, a side air inlet 12, a bottom air inlet 13, and an air outlet 14. The airflow direction is opposite to the vehicle's direction of travel. The front air inlet 11 is provided on a front face 15 of the housing 1, the front face 15 being directly opposite the airflow direction. The side air inlet 12 is provided on a side face 16 of the housing 1, the side face 16 being parallel to the airflow direction. The bottom air inlet 13 is provided on a bottom surface 17 of the housing 1, and the air outlet 14 is provided on a top surface 18 of the housing 1. By providing air inlets on the front, side, and bottom surfaces of the air conditioner housing, the present invention can increase the air intake area, thereby improving the cooling / heating effect of the vehicle air conditioner, increasing energy efficiency, and reducing energy consumption of the vehicle air conditioner.

[0040] In some embodiments, the side surface 16 is disposed between the top surface 18 and the bottom surface 17, and there are two side surfaces 16, each of which is provided with the side air inlet 12. The present invention further increases the air intake area by providing side air inlets on both side surfaces, further improving energy efficiency and reducing energy consumption of the fan and the air conditioner.

[0041] In some embodiments, a first baffle 31 is provided at the bottom air inlet 13, wherein the connection end of the first baffle 31 is connected to the housing 1, the free end of the first baffle 31 extends outward, and the direction from the connection end of the first baffle 31 to the free end of the first baffle 31 is arranged obliquely with respect to the direction of airflow, and the direction from the connection end of the first baffle 31 to the free end of the first baffle 31 faces upstream in the direction of airflow. The present invention also provides a first baffle at the bottom air inlet, wherein the oblique direction from the connection end of the first baffle to its free end faces upstream in the direction of airflow, so that the airflow passing through the bottom air inlet is effectively induced by the first baffle, thereby effectively utilizing the flow velocity of the airflow, reducing the energy consumption of the fan, and improving energy efficiency.

[0042] The present invention proposes a parking air conditioner outdoor unit. By adding a baffle structure to the air inlet or outlet of the outdoor unit, airflow is introduced to assist heat exchange and improve heat exchange efficiency. A detection device is also provided to adjust the fan speed according to wind speed, temperature, and vehicle speed, thereby achieving energy conservation. The invention has the following improvements:

[0043] 1. Add a shutter-type baffle structure at the parking air-conditioning vent. The baffle can be opened and closed to provide dust protection.

[0044] 2. Set the inclination angle of the baffle structure according to the installation direction of the parking air conditioner so that the air inlet baffle can assist in introducing airflow, the air outlet baffle can prevent airflow backflow, and can also assist in sucking out airflow, thereby increasing heat exchange efficiency and reducing energy consumption.

[0045] 3. By setting up a detection device to detect the temperature of the refrigerant pipe, and based on this, the fan speed is intelligently adjusted to achieve energy saving.

[0046] The beneficial effects are as follows:

[0047] 1. By installing a baffle at the outdoor unit's air inlet, you can direct the car's moving airflow into the air conditioner's outdoor unit. Alternatively, adding a baffle at the air outlet can prevent high-speed airflow from flowing back during driving, or assist in drawing air out of the outlet. Both options can increase heat exchange efficiency.

[0048] 2. The baffle structure can be closed to provide dust protection when the air conditioner is idle.

[0049] 3. Equipped with wind pressure and wind speed detection devices, when the auxiliary airflow intensity is large enough, the fan power is adjusted to save energy.

[0050] 4. A temperature detection device is installed on the pipe after the heat exchanger. When the temperature is lower than the set value, the fan power is adjusted to save energy.

[0051] In some embodiments, multiple first baffles 31 are provided, spaced apart from each other. The direction from the connection end of the first baffle 31 to the free end of the first baffle 31 forms an angle of 90° to 180° with the airflow direction. The present invention utilizes multiple first baffles to create multiple air inlet and outlet locations, thereby further increasing the airflow rate, further utilizing the airflow velocity, reducing fan energy consumption, and further improving energy efficiency.

[0052] In some embodiments, a second baffle 32 is provided at the side air inlet 12, wherein the connection end of the second baffle 32 is connected to the housing 1, the free end of the second baffle 32 extends outward, and the direction from the connection end of the second baffle 32 to the free end of the second baffle 32 is inclined with respect to the direction of airflow, and the direction from the connection end of the second baffle 32 to the free end of the second baffle 32 faces upstream in the direction of airflow. The present invention provides a second baffle at the side air inlet, wherein the inclination direction from the connection end of the second baffle to its free end faces upstream in the direction of airflow, thereby enabling the airflow passing through the bottom air inlet to be effectively induced by the second baffle, thereby further effectively utilizing the flow velocity of the airflow, reducing the energy consumption of the fan, and improving energy efficiency.

[0053] The present invention was designed with the orientation of the parking air conditioner in mind. An air inlet is added to the side facing the same direction as the front of the vehicle. This allows high-speed airflow relative to the vehicle to enter the air conditioner's outdoor unit during normal driving, passing through the heat exchanger and enhancing heat exchange. A side air vent is provided, along with a louvered baffle to assist in air intake. A baffle is also provided at the air outlet to assist in air discharge and prevent backflow. During normal driving, high-speed airflow from the air inlet is drawn into the air conditioner by the baffle, passing through the heat exchanger, and exiting through the air outlet.

[0054] Taking the top-mounted parking outdoor unit as an example, a detailed explanation is given.

[0055] When the parking air conditioner is turned off, the baffle closes to prevent dust and protect the interior of the air conditioner. When the parking air conditioner is turned on, the baffle opens under the action of the motor.

[0056] The inlet baffle (outer side of the air inlet baffle) is oriented in the direction of vehicle travel, with the free end of the baffle extending upstream of the outside airflow from the air conditioner. A portion of the outside airflow is blocked by the baffle and directed into the air conditioner's interior unit. The outlet baffle (outer side of the air outlet baffle) is oriented in the opposite direction of vehicle travel, with the free end of the outlet baffle extending downstream of the outside airflow. The baffle lifts the outside airflow and directs the airflow, making the angle between the airflow inside the air conditioner and the outside airflow less than 90 degrees. In other words, the airflow from the air conditioner's outlet flows downstream of the outside airflow. This prevents the outside airflow from backflowing or interfering with the airflow. Furthermore, according to Bernoulli's principle, when the fluid velocity is higher, the pressure is lower (the outside airflow velocity is higher than the outside airflow velocity). During vehicle travel, the outside airflow introduced by the relative motion is faster than the airflow velocity inside the air conditioner due to the fan, meaning the outside pressure is relatively low. Therefore, the pressure differential can be used to draw air out of the air conditioner.

[0057] When the auxiliary heat dissipation effect generated by the baffle reaches a certain level, the fan speed can be reduced through the following control method to achieve energy saving effect.

[0058] In some embodiments, multiple second baffles 32 are provided, spaced apart from each other. The direction from the connection end of the second baffle 32 to the free end of the second baffle 32 forms an angle of 90° to 180° with the airflow direction. The present invention utilizes multiple second baffles to create multiple air inlet and outlet locations, thereby further increasing the airflow rate, further utilizing the airflow velocity, reducing fan energy consumption, and further improving energy efficiency.

[0059] In some embodiments, a third baffle 33 is provided at the air outlet 14. The connection end of the third baffle 33 is connected to the housing 1, and the free end of the third baffle 33 extends outward. The direction from the connection end of the third baffle 33 to the free end of the third baffle 33 is arranged obliquely with respect to the direction of airflow, and the direction from the connection end of the third baffle 33 to the free end of the third baffle 33 faces downstream in the direction of airflow. The present invention also provides a third baffle at the air outlet, with the direction from the connection end of the third baffle to the free end of the third baffle facing downstream in the direction of airflow. The third baffle's wind-inducing effect allows the airflow outside the vehicle to guide the outgoing airflow to a certain extent, effectively directing the outgoing air through the flow diversion, thereby improving the airflow effect, further reducing the energy consumption of the fan, and improving the energy efficiency of the vehicle air conditioner.

[0060] In some embodiments, multiple third baffles 33 are provided, spaced apart from each other. The direction from the connection end of each third baffle 33 to the free end of each third baffle 33 forms an angle of 90° to 180° with the airflow direction. The present invention utilizes multiple third baffles to create multiple air outlets and guides, thereby further increasing the airflow rate, further utilizing the airflow velocity, reducing fan energy consumption, and further improving energy efficiency.

[0061] In some embodiments, an air inlet grille 34 is provided at the front air inlet 11, and a temperature detection device is provided on the refrigerant pipeline connected to the heat exchanger. Along the direction of the refrigerant flow, the temperature detection device is provided on the refrigerant pipeline at the outlet end of the heat exchanger. The present invention can guide the air inlet of the front air inlet through the air inlet grille, mainly to protect the entry of impurities such as dust particles in the air; the present invention also establishes a connection between the temperature and the wind speed of the fan by providing a temperature detection device on the refrigerant pipe downstream of the heat exchanger, so that when the refrigerant temperature is low (this indicates that the heat exchange capacity of the heat exchanger is sufficient or excessive), the fan wind speed can be selectively controlled to be lowered, and the fan speed can be reduced, thereby reducing the energy consumption of the fan while ensuring the heat exchange effect of the heat exchanger and improving the energy efficiency of the air conditioner; and when the refrigerant temperature is high (this indicates that the heat exchange capacity of the heat exchanger is insufficient), the fan wind speed can be selectively controlled to be increased, and the fan speed can be increased, thereby enhancing the heat exchange of the heat exchanger and ensuring the heat exchange effect; therefore, the energy efficiency of the system can be effectively improved, saving energy and increasing efficiency.

[0062] The present invention also provides a method for controlling the vehicle air conditioner as described above, comprising:

[0063] Detection step: detecting the speed of the vehicle and the windshield of the fan;

[0064] A determination step, determining a relationship between the vehicle speed and a preset vehicle speed, and determining a relationship between the windshield and the preset windshield;

[0065] The control step is as follows: when the vehicle speed is greater than the preset speed and the wind speed is greater than the preset wind speed, the wind speed is controlled to decrease; when the vehicle speed is less than the preset speed and the wind speed is less than the preset wind speed, the wind speed is controlled to increase.

[0066] The present invention also enables the effective use of the airflow velocity generated by the vehicle speed to enhance heat exchange when the vehicle speed is high through the association setting of the vehicle speed and the fan wind gear in the control method. At this time, the fan rotation speed can be reduced, thereby effectively reducing the fan's energy consumption and improving energy efficiency; and when the vehicle speed is low, the fan wind gear is controlled to increase and the fan speed is increased, thereby effectively ensuring that the heat exchange effect of the heat exchanger is not reduced. Therefore, the energy efficiency of the system can be effectively improved, the energy consumption of the fan, etc. can be reduced, and the effect of energy saving and efficiency improvement can be achieved.

[0067] In some embodiments, three vehicle speeds v1, v2, and v3 are preset, v1>v2>v3, and three fan gears 0, 1, and 2 are preset, according to the speed 2>1>0;

[0068] In the control step, when the vehicle speed v0≤v1 and the current K=2, the current fan speed is controlled to remain unchanged; when the vehicle speed v0≤v1 and the current K≠2, the current fan speed is controlled to be K=2; when the vehicle speed v1<v0≤v2 and the current K=1, the current fan speed is controlled to remain unchanged; when the vehicle speed v1<v0≤v2 and the current K≠1, the current fan speed is controlled to be K=1; when the vehicle speed v2<v0≤v3 and the current K=0, the current fan speed is controlled to remain unchanged; when the vehicle speed v2<v0≤v3 and the current K≠0, the current fan speed is controlled to be K=0; when the vehicle speed v0≥v3, the current fan is controlled to be closed and the wind speed is 0.

[0069] This is the preferred connection between the vehicle speed and the fan wind speed (rotation speed) of the present invention, which can control the wind speed to the maximum when the speed is the lowest and the wind speed is not the maximum, so as to enhance the airflow velocity and enhance the heat exchange capacity; when the speed is low and the wind speed is not 1, the wind speed is controlled to reach 1, so that the wind speed meets the vehicle speed condition, which can not only increase the airflow velocity, but also prevent the fan wind speed from being too large and causing excessive energy consumption; when the speed is high and the fan wind speed is not 0, the wind speed is controlled to 0, which can effectively utilize the airflow velocity generated by the vehicle speed to produce effective heat exchange and reduce the energy consumption of the fan; when the vehicle speed is too high, the fan is turned off. At this time, the airflow velocity generated by the vehicle speed alone can effectively play a heat exchange role. Therefore, turning off the fan at this time can effectively reduce energy consumption and improve the energy efficiency of the system.

[0070] Vehicle speed control of the present invention:

[0071] Three vehicle speeds, v1, v2, and v3, are preset, with v1 > v2 > v3. Three fan gears, 0, 1, and 2, are also preset, with 2 being the highest gear. When K = 0, the fan speed is > 0. While the car is moving, the air conditioner is turned on, and the fan runs at maximum speed for a while. The average speed over the past short period is then measured and compared to the preset speed, and the fan is adjusted to the preset gear.

[0072] In some embodiments, when a temperature detection device is provided on the refrigerant pipeline connected to the heat exchanger:

[0073] The detecting step detects the refrigerant temperature T2 by the temperature detecting device;

[0074] The determining step further determines the relationship between T2 and the preset temperature T1;

[0075] The control step is as follows: when T2>T1 and the current fan speed K=2, the current fan speed is controlled to remain unchanged; when T2>T1 and the current K≠2, the current fan speed is controlled to be K=K+1, and the fan speed is increased; when T2≤T1 and the current fan speed K≠0, the fan speed is controlled to be K=K-1, and the fan speed is lowered; when T2≤T1 and the current fan speed K=0, the fan speed is controlled to be K=0, and the fan speed is controlled to remain unchanged.

[0076] The present invention also sets the association between the refrigerant temperature and the fan speed in the control method, so that when the refrigerant temperature is low (this indicates that the heat exchange capacity of the heat exchanger is sufficient or excessive), the fan speed can be selectively controlled to be lowered, thereby reducing the fan energy consumption while ensuring the heat exchange effect of the heat exchanger, thereby improving the energy efficiency of the air conditioner; and when the refrigerant temperature is high (this indicates that the heat exchange capacity of the heat exchanger is insufficient), the fan speed can be selectively controlled to be increased, and the fan speed can be increased, thereby enhancing the heat exchange of the heat exchanger and ensuring the heat exchange effect; therefore, the energy efficiency of the system can be effectively improved, saving energy and increasing efficiency.

[0077] The present invention takes temperature control under refrigeration conditions as an example:

[0078] The fan has multiple gear settings. For example, three gears are K, with K = 0, 1, and 2, where K = 2 is the highest gear and K = 0 is the lowest gear. A temperature detection device is installed in the pipe after the refrigerant passes through the heat exchanger, and a preset temperature T1 is set at this point when the fan is operating normally at room temperature, without a baffle, and at normal operation.

[0079] When the air conditioner is turned on, the damper opens, the fan runs at maximum speed, gear K = 2, and the timer starts. After 600 seconds, the detection device detects temperature T2. If T2 is less than T1, the fan speed is reduced to reduce energy consumption, and the timer is reset to zero. After 600 seconds, another T2 is detected, and the cycle continues.

[0080] During operation, when the fan is already running at the lowest gear, that is, K=0, but T2 is still less than T1, the fan is turned off and tested again after 600s.

[0081] When the fan speed has been reduced, it is detected that T2 is greater than T1, and the fan speed is increased to ensure the cooling effect.

[0082] If the fan is already at the highest gear and T2 is still greater than T1, the fan will maintain the highest gear and provide efficient cooling.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A vehicle air conditioner, characterized in that: include: A shell (1), a fan (2) and a heat exchanger, wherein the heat exchanger and the fan (2) are both arranged inside the shell (1); the shell (1) is provided with a front air inlet (11), a side air inlet (12), a bottom air inlet (13) and an air outlet (14); the air flow direction is opposite to the direction of travel of the vehicle; the front air inlet (11) is provided on the front face (15) of the shell (1), and the front face (15) is directly opposite to the air flow direction; the side air inlet (12) is provided on the side face (16) of the shell (1), and the side face (16) is parallel to the air flow direction; the bottom air inlet (13) is provided on the bottom face (17) of the shell (1); and the air outlet (14) is provided on the top face (18) of the shell (1); A first baffle (31) is provided at the bottom air inlet (13), a connecting end of the first baffle (31) is connected to the housing (1), a free end of the first baffle (31) extends outward, a direction from the connecting end of the first baffle (31) to the free end of the first baffle (31) is arranged obliquely to the direction of airflow, and a direction from the connecting end of the first baffle (31) to the free end of the first baffle (31) faces upstream of the direction of airflow; A second baffle (32) is provided at the side air inlet (12), a connecting end of the second baffle (32) is connected to the shell (1), a free end of the second baffle (32) extends outward, a direction from the connecting end of the second baffle (32) to the free end of the second baffle (32) is inclined to the direction of airflow, and a direction from the connecting end of the second baffle (32) to the free end of the second baffle (32) is toward the upstream of the direction of airflow.

2. The vehicle air conditioner according to claim 1, characterized in that: The side surface (16) is arranged between the top surface (18) and the bottom surface (17), and there are two side surfaces (16), and each side surface (16) is provided with the side air inlet (12).

3. The vehicle air conditioner according to claim 1, characterized in that: There are a plurality of first baffles (31), and the plurality of first baffles (31) are arranged at intervals; a direction from the connection end of the first baffle (31) to the free end of the first baffle (31) is provided with an angle of 90° to 180° with the direction of airflow.

4. The vehicle air conditioner according to claim 1, characterized in that: There are a plurality of second baffles (32), and the plurality of second baffles (32) are arranged at intervals; a direction from the connection end of the second baffle (32) to the free end of the second baffle (32) is provided with an angle of 90° to 180° with the direction of airflow.

5. The vehicle air conditioner according to any one of claims 1 to 4, characterized in that: A third baffle (33) is provided at the air outlet (14), a connecting end of the third baffle (33) is connected to the shell (1), a free end of the third baffle (33) extends outward, a direction from the connecting end of the third baffle (33) to the free end of the third baffle (33) is inclined to the direction of airflow, and a direction from the connecting end of the third baffle (33) to the free end of the third baffle (33) is directed downstream of the direction of airflow.

6. The vehicle air conditioner according to claim 5, characterized in that: There are a plurality of third baffles (33), and the plurality of third baffles (33) are arranged at intervals; a direction from the connection end of the third baffle (33) to the free end of the third baffle (33) is provided with an angle of 90° to 180° with the airflow direction.

7. The vehicle air conditioner according to any one of claims 1 to 4, characterized in that: An air inlet grille (34) is provided at the front air inlet (11), and a temperature detection device is provided on the refrigerant pipeline connected to the heat exchanger. Along the direction of refrigerant flow, the temperature detection device is provided on the refrigerant pipeline at the outlet end of the heat exchanger.

8. A method for controlling a vehicle air conditioner according to any one of claims 1 to 7, characterized in that: include: Detection step: detecting the speed of the vehicle and the windshield of the fan; A determination step, determining a relationship between the vehicle speed and a preset vehicle speed, and determining a relationship between the windshield and the preset windshield; The control step is as follows: when the vehicle speed is greater than the preset speed and the wind speed is greater than the preset wind speed, the wind speed is controlled to decrease; when the vehicle speed is less than the preset speed and the wind speed is less than the preset wind speed, the wind speed is controlled to increase.

9. The control method according to claim 8, characterized in that: Three vehicle speeds v1, v2 and v3 are preset, v1>v2>v3, and three fan gears are preset 0, 1, 2, according to the speed 2>1>0; In the control step, when the vehicle speed v0≤v1 and the current K=2, the current fan speed is controlled to remain unchanged; when the vehicle speed v0≤v1 and the current K≠2, the current fan speed is controlled to be K=2; when the vehicle speed v1<v0≤v2 and the current K=1, the current fan speed is controlled to remain unchanged; when the vehicle speed v1<v0≤v2 and the current K≠1, the current fan speed is controlled to be K=1; when the vehicle speed v2<v0≤v3 and the current K=0, the current fan speed is controlled to remain unchanged; when the vehicle speed v2<v0≤v3 and the current K≠0, the current fan speed is controlled to be K=0; when the vehicle speed v0≥v3, the current fan is controlled to be closed and the wind speed is 0.

10. The control method according to claim 9, characterized in that: When a temperature detection device is provided on the refrigerant pipeline connected to the heat exchanger: The detecting step detects the refrigerant temperature T2 by the temperature detecting device; The determining step further determines the relationship between T2 and the preset temperature T1; The control step is as follows: when T2>T1 and the current fan speed K=2, the current fan speed is controlled to remain unchanged; when T2>T1 and the current K≠2, the current fan speed is controlled to K=K+1 to increase the fan speed; when T2≤T1 and the current fan speed K≠0, the fan speed is controlled to K=K-1 to reduce the fan speed; when T2≤T1 and the current fan speed K=0, the fan speed is controlled to K=0 to keep the fan speed unchanged.

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