CN115257289A - Control method of vehicle air conditioner external fan - Google Patents
Control method of vehicle air conditioner external fan Download PDFInfo
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- CN115257289A CN115257289A CN202210910801.6A CN202210910801A CN115257289A CN 115257289 A CN115257289 A CN 115257289A CN 202210910801 A CN202210910801 A CN 202210910801A CN 115257289 A CN115257289 A CN 115257289A
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000004378 air conditioning Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 18
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000000295 complement effect Effects 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 description 12
- 238000001816 cooling Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00871—Air directing means, e.g. blades in an air outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
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- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to the technical field of automobile air conditioners, in particular to a control method of an external fan of a vehicle air conditioner. The application aims at solving the problem that the control precision of the outdoor fan of the existing vehicle air conditioner is low. To this end, the vehicle air conditioner of the present application includes an indoor unit disposed in a cab of a vehicle and an outdoor unit disposed outside the cab, the outdoor unit including a radiator and an external fan, a windward side of the radiator being disposed toward a forward direction of the vehicle, the control method including: detecting the running speed of the vehicle after the air conditioner of the vehicle is started; comparing the running speed with a preset speed threshold value; if the running speed is less than the preset speed threshold value, determining the running rotating speed of the outer fan based on the temperature difference between the room temperature and the set temperature of the cab; and controlling the outer fan to operate at the operating rotating speed. The control method can improve the control precision of the outer fan, enables the rotating speed of the outer fan and the running speed of the vehicle to be mutually complementary, and reduces the energy consumption of the vehicle on the premise of ensuring the operation effect of the air conditioner.
Description
Technical Field
The invention relates to the technical field of automobile air conditioners, in particular to a control method of an external fan of an air conditioner of a vehicle.
Background
The outdoor unit of the air conditioner of a large-scale vehicle is generally arranged on the roof of a cab, the indoor unit is arranged in the cab, the installation direction of the outdoor unit is considered that the influence of backwind is generally opposite to the driving direction of the vehicle, and the windward side of the outdoor condenser is arranged to be consistent with the driving direction of the vehicle. Therefore, in the process of automobile moving, due to relative movement, air flow can enter the condenser from the windward side of the condenser, and a certain positive effect is achieved on heat dissipation of the condenser.
However, the external fan control precision of the current automobile air conditioner is low, which is specifically represented by: in the process of high-speed running of the automobile, the outdoor fan is started to dissipate heat of the condenser, extra power waste is caused, and the fuel consumption of the automobile is increased. In a low-speed running or parking state of the automobile, natural cooling formed by flowing only by external wind speed cannot guarantee the heat dissipation effect of the outdoor heat exchanger, so that the system pressure is increased, the refrigeration effect is poor or high-pressure alarm is given out, and the compressor is damaged.
Accordingly, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
In order to solve at least one of the above-mentioned problems in the prior art, that is, to solve the problem of low control accuracy of the outdoor fan of the conventional vehicle air conditioner, the present application provides a control method of an outdoor fan of a vehicle air conditioner, where the vehicle air conditioner includes an indoor unit disposed in a cab of a vehicle and an outdoor unit disposed outside the cab, the outdoor unit includes a radiator and an outdoor fan, and a windward side of the radiator is disposed toward a forward direction of the vehicle, the control method including:
after the vehicle air conditioner is started, detecting the running speed of the vehicle;
comparing the running speed with a preset speed threshold value;
if the running speed is smaller than the preset speed threshold value, determining the running rotating speed of the outer fan based on the temperature difference between the room temperature and the set temperature of the cab;
and controlling the outer fan to operate at the operating rotating speed.
In a preferable embodiment of the method for controlling an external air blower of a vehicle air conditioner, the step of determining the operating speed of the external air blower based on the temperature difference between the room temperature and the set temperature of the cab further includes:
and if the temperature difference is greater than or equal to a first preset difference threshold value, determining the running rotating speed of the outer fan to be a first preset rotating speed.
In a preferable technical scheme of the control method of the vehicle air conditioner external fan, the first preset rotating speed is the maximum rotating speed of the external fan.
In a preferable embodiment of the method for controlling an external air blower of a vehicle air conditioner, the step of determining the operating speed of the external air blower based on the temperature difference between the room temperature and the set temperature of the cab further includes:
and if the temperature difference is smaller than the first preset difference threshold value and larger than or equal to a second preset difference threshold value, determining the running rotating speed of the outer fan based on a first fitting formula.
In a preferred embodiment of the above method for controlling an external blower of a vehicle air conditioner, the step of "determining an operating speed of the external blower based on a first fitting formula" further includes:
calculating the operating speed of the outer fan based on the following formula:
r＝n(S0/S)×R
wherein r is the running rotating speed of the outer fan; s is the running speed of the vehicle; s0 is the preset speed threshold; r is the maximum rotating speed of the outer fan; n is a rotation speed coefficient and n is less than 1.
In a preferable embodiment of the method for controlling an external air blower of a vehicle air conditioner, the step of determining the operating speed of the external air blower based on the temperature difference between the room temperature and the set temperature of the cab further includes:
if the temperature difference is smaller than the second preset difference threshold value, determining the running rotating speed of the outer fan to be a second preset rotating speed;
and the second preset rotating speed is less than the first preset rotating speed.
In a preferable technical scheme of the control method of the vehicle air conditioner external fan, the second preset rotating speed is the minimum rotating speed of the external fan.
In a preferable technical scheme of the control method of the vehicle air conditioner external fan, the first preset difference threshold value is any value between 4 ℃ and 6 ℃, and/or the second preset difference threshold value is any value between 2 ℃ and 4 ℃.
In a preferable technical solution of the control method for an external fan of an air conditioner of a vehicle, the control method further includes:
and if the running speed is greater than or equal to the preset speed threshold value, controlling the outer fan to stop running.
In a preferred technical solution of the control method for an external blower of an air conditioner of a vehicle, the preset speed threshold is any value from 40km/h to 80 km/h.
In a preferred embodiment of the present invention, a vehicle air conditioner includes an indoor unit disposed in a cab of a vehicle and an outdoor unit disposed outside the cab, the outdoor unit includes a radiator and an external fan, a windward side of the radiator is disposed toward a forward direction of the vehicle, and the control method includes: detecting the running speed of the vehicle after the air conditioner of the vehicle is started; comparing the running speed with a preset speed threshold value; if the running speed is less than the preset speed threshold value, determining the running rotating speed of the outer fan based on the temperature difference between the room temperature and the set temperature of the cab; and controlling the outer fan to operate at the operating rotating speed.
By determining the operating rotating speed of the outer fan based on the temperature difference between the room temperature of the cab and the set temperature when the running speed is smaller than the preset speed threshold, the control method can improve the control precision of the outer fan, so that the rotating speed of the outer fan and the running speed of the vehicle are mutually complementary, and the energy consumption of the vehicle is reduced on the premise of ensuring the running effect of the air conditioner.
Further, when the temperature difference is larger than or equal to the first preset difference threshold value, the outer fan is controlled to operate at the maximum rotating speed, and the operation effect of the air conditioner can be guaranteed.
Furthermore, when the temperature difference is smaller than the first preset difference threshold value and larger than or equal to the second preset difference threshold value, the operation rotating speed of the outer fan is determined based on the first fitting formula, the rotating speed of the outer fan and the running speed of the vehicle can be mutually complemented, the control precision of the outer fan is improved, and the operation effect of the air conditioner is guaranteed.
Further, when the temperature difference is smaller than a second preset difference threshold value, the outer fan is controlled to operate at the minimum rotating speed, and energy consumption of the vehicle can be reduced.
Furthermore, when the running speed is greater than or equal to the preset speed threshold value, the outer fan is controlled to stop running, the air flow in the running process of the vehicle can be utilized to dissipate heat of the radiator, and the energy consumption of the vehicle is reduced while the heat dissipation effect is ensured.
Drawings
The control method of the vehicular air conditioning external blower of the present application is described below with reference to the accompanying drawings. In the drawings:
FIG. 1 is a flow chart of a method for controlling an external fan of a vehicle air conditioner according to the present application;
FIG. 2 is a schematic view of the vehicle air conditioner arrangement of the present application;
FIG. 3 is a logic diagram of a control method for an external air conditioner fan of a vehicle according to the present application.
List of reference numerals
1. An outdoor unit; 11. a housing; 111. an air inlet; 112. an air outlet; 12. a heat sink; 13. an outer fan.
Detailed Description
Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the present application, and are not intended to limit the scope of protection of the present application. For example, although the following detailed steps of the method of the present application are described in detail, a person skilled in the art can combine, separate and change the order of the following steps without departing from the basic principle of the present application, and the technical solution thus modified does not change the basic concept of the present application and therefore falls within the protection scope of the present application.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
First, referring to fig. 1 and 2, a control method of an air conditioner external fan for a vehicle of the present application will be described. Fig. 1 is a flowchart of a control method of an external air conditioner fan of a vehicle according to the present application; fig. 2 is a schematic view of an arrangement mode of the vehicle air conditioner of the present application.
Referring first to fig. 2, the vehicle air conditioner includes an indoor unit disposed in a cab and an outdoor unit 1 disposed on a roof of the cab, the outdoor unit 1 includes a radiator 12 and an external fan 13, an installation direction of the outdoor unit 1 is opposite to a traveling direction of a vehicle, that is, a windward side of the radiator 12 is disposed toward an advancing direction of the vehicle, a housing 11 of the outdoor unit 1 is correspondingly provided with an air inlet 111 on the windward side, and an air outlet 112 on the leeward side. More preferably, the windward side of the radiator 12 may be disposed toward the forward direction of the vehicle, such as the radiator 12 is mounted upright, or the like, by disposing the side of the radiator 12 having a larger area toward the windward side. For this reason, it can be understood by those skilled in the art that the structural shape of the heat sink 12 can be properly changed to achieve both the heat dissipation area and the volume, so as to achieve the effect of increasing the heat dissipation area of the heat sink 12 without significantly increasing the height of the vehicle roof.
Of course, it will be understood by those skilled in the art that although the above embodiments show a specific arrangement of the air conditioner for the vehicle, this is merely to illustrate the principles of the present application and is not intended to limit the scope of the present application. Those skilled in the art can make adjustments to the specific arrangement of the vehicle air conditioner described above without departing from the principles of the present application.
Referring back to fig. 1, as described in the background art, the installation direction of the existing vehicle air conditioner is generally opposite to the traveling direction of the vehicle, so that the windward side of the outdoor condenser coincides with the traveling direction of the vehicle. However, the control of the external fan of the current vehicle air conditioner and the running speed of the vehicle are independent of each other, and the control precision of the external fan is the same as that of the external fan, which is specifically represented as follows: when the vehicle runs at a high speed, the external fan is started, so that the heat dissipation of the condenser is not helped, and the additional power consumption is increased; when the vehicle runs at low speed, the natural cooling formed by the flowing of the air only depending on the external wind speed cannot ensure the heat dissipation effect of the outdoor heat exchanger.
In order to solve the problem that the control precision of the outdoor fan of the conventional vehicle air conditioner is low, the control method of the external fan of the vehicle air conditioner comprises the following steps:
s101, detecting the running speed of the vehicle after the air conditioner of the vehicle is started. For example, the running speed of the vehicle is acquired by a speed sensor provided on the air conditioner, or the running speed acquired by a wheel speed sensor provided in the vehicle itself is acquired by communicating with the vehicle.
And S103, comparing the running speed with a preset speed threshold value. For example, after the running speed of the vehicle is obtained, the running speed is compared with a preset speed threshold, such as comparing the running speed with the preset speed threshold by calculating whether the difference value of the running speed and the preset speed threshold is greater than 0, or comparing the running speed with the preset speed threshold by calculating whether the ratio of the running speed and the preset speed threshold is greater than 1. Wherein the preset speed threshold value is preset, such as any value in the range of 40km/h-80 km/h.
And S105, if the running speed is smaller than a preset speed threshold value, determining the running rotating speed of the external fan based on the temperature difference between the room temperature and the set temperature of the cab. For example, when the driving speed is less than the preset speed threshold, it is proved that the driving speed of the vehicle is slow at this time, and the external fan needs to be started to assist the radiator to exchange heat. At this time, the room temperature and the set temperature of the cab are obtained, the temperature difference between the room temperature and the set temperature is calculated, and the specific operation rotating speed of the outer fan is determined based on the temperature difference, for example, the operation rotating speed of the outer fan is determined through a comparison relation table between the temperature difference and the operation rotating speed, a fitting formula between the temperature difference and the operation rotating speed, or based on the range of the temperature difference. The room temperature of the cab can be obtained based on a temperature sensor, the temperature sensor can be arranged in an air conditioner indoor unit, such as an air inlet or an indoor unit shell, of course, the temperature sensor can also be arranged at any position in the cab as long as the room temperature of the cab can be accurately obtained. The set temperature is a target temperature of a cab set by a driver, and the temperature can be directly obtained from the operation parameters of the air conditioner.
And S107, controlling the outer fan to operate at the running rotating speed. For example, after determining the specific operating speed of the outer fan, the outer fan is controlled to operate at that speed.
From the above description, it can be seen that, when the running speed is less than the preset speed threshold, the running rotating speed of the outer fan is determined based on the temperature difference between the room temperature and the set temperature of the cab, the control method of the application can improve the control precision of the outer fan, so that the rotating speed of the outer fan is complementary to the running speed of the vehicle, and the energy consumption of the vehicle is reduced on the premise of ensuring the running effect of the air conditioner.
A possible preferred embodiment of the present application is described in detail below.
In a preferred embodiment, the step of determining the operating speed of the external fan based on the temperature difference between the room temperature and the set temperature of the cab further comprises:
(1) And if the temperature difference is greater than or equal to a first preset difference threshold value, determining the running rotating speed of the outer fan to be a first preset rotating speed. In particular, the first preset difference threshold is any value from 4 ℃ to 6 ℃, preferably 5 ℃ in the present application. The first predetermined rotational speed is in this application preferably the maximum rotational speed of the outer fan. When the difference in temperature was more than or equal to 5 ℃, it was great to prove the temperature difference of the temperature in the driver's cabin and set temperature, needs rapid cooling, and the operation of control outer fan with maximum rotational speed this moment can improve the radiating effect of radiator by the at utmost, reduces the air-out temperature of indoor set, reaches rapid cooling's purpose.
Through when the difference in temperature is more than or equal to first preset difference threshold value, control outer fan with the maximum rotational speed operation, can guarantee the operation effect of air conditioner, improve user experience.
(2) And if the temperature difference is smaller than a second preset difference threshold value, determining the running rotating speed of the outer fan to be a second preset rotating speed. Specifically, the second preset rotation speed is less than the first preset rotation speed, and the second preset difference threshold in this application is any value in the range of 2 ℃ to 4 ℃, preferably 3 ℃. The second predetermined rotational speed is herein preferably the minimum rotational speed of the outer fan. When the temperature difference is less than 3 ℃, the temperature difference between the temperature in the cab and the set temperature is proved to be smaller, and the temperature in the cab is close to the set temperature, so that the indoor air outlet temperature is kept stable without rapid cooling. At the moment, the outer fan is controlled to operate at the minimum rotating speed, the heat dissipation effect of the radiator can be reduced to the maximum extent, the refrigerating capacity of the indoor unit is reduced, the purpose of slowly cooling to the set temperature is achieved, and excessive cooling is avoided.
When the temperature difference is smaller than a second preset difference value threshold value, the outer fan is controlled to operate at the minimum rotating speed, energy consumption of the vehicle can be reduced, and the temperature in the carriage is maintained to stably drop to the set temperature.
(3) And if the temperature difference is smaller than the first preset difference threshold value and larger than or equal to the second preset difference threshold value, determining the running rotating speed of the outer fan based on a first fitting formula. Specifically, when the temperature difference is less than 5 ℃ and greater than 3 ℃, the operating speed of the outer fan is calculated based on the following first fitting formula:
r＝n(S0/S)×R (1)
in the formula (1), r is the running rotating speed of the outer fan; s is the running speed of the vehicle; s0 is a preset speed threshold value; r is the maximum rotating speed of the outer fan; n is a rotation speed coefficient and n is less than 1.
According to the formula (1), on the premise that the rotation speed coefficient n, the preset speed threshold value S0 and the maximum rotation speed R of the outer fan are all fixed quantities, the running speed S of the vehicle and the running rotation speed R of the outer fan are in an inverse proportion relation, namely, when the temperature difference is smaller than 5 ℃ and larger than 3 ℃, the higher the speed of the vehicle is, the lower the running rotation speed required by the corresponding outer fan is, so that the air quantity provided by the outer fan is complementary with the air flow in the running process of the vehicle, and the consistency of the heat dissipation effect at any running speed is ensured.
When the temperature difference is smaller than the first preset difference threshold value and larger than or equal to the second preset difference threshold value, the operation rotating speed of the outer fan is determined based on the first fitting formula, so that the rotating speed of the outer fan and the running speed of a vehicle are mutually complementary, the control precision of the outer fan is improved, and the operation effect of the air conditioner is ensured.
In a preferred embodiment, the method for controlling the air conditioner external fan of the vehicle further comprises: and if the running speed is greater than or equal to the preset speed threshold value, controlling the outer fan to stop running.
In particular, the preset speed threshold may be any value from 40km/h to 80km/h in the present application, preferably 60km/h. When the running speed of the vehicle is greater than 60km/h, the vehicle has a certain form speed, the moving speed of the airflow relative to the vehicle is higher at the running speed, and the heat dissipation requirement of the radiator can be completely met when the radiator is subjected to heat dissipation through the airflow. Therefore, the outer fan is controlled to stop running at the moment, and the heat of the radiator is radiated only by using relative airflow in the running process.
When the running speed is greater than or equal to the preset speed threshold value, the external fan is controlled to stop running, the air flow in the running process of the vehicle can be utilized to dissipate heat of the radiator, and the energy consumption of the vehicle is reduced while the heat dissipation effect is ensured.
It should be noted that the above preferred embodiments are only used for illustrating the principle of the present application, and are not intended to limit the protection scope of the present application. Without departing from the principles of the present application, those skilled in the art may adjust the setting manner described above, so that the present application may be applicable to more specific application scenarios.
For example, in an alternative embodiment, although the above embodiment describes the control based on the temperature difference divided into three sections when the traveling speed is less than the preset speed threshold, the control is not constant, as long as the purpose of determining the operating speed of the external air blower based on the temperature difference between the room temperature of the cab and the set temperature when the traveling speed is less than the preset speed threshold can be achieved. For example, the operating speed of the outer fan may be determined based on a correlation table between the temperature difference and the operating speed of the outer fan without dividing the temperature interval. Or the temperature interval is divided into two or more temperature intervals to adapt to different application scenes.
For another example, in another alternative embodiment, although the foregoing embodiment is described with reference to the first preset difference threshold being 5 ℃ and the second preset difference threshold being 3 ℃, the specific division manner of the two difference thresholds is not exclusive, and those skilled in the art may adjust the two difference thresholds based on different application scenarios, and such adjustment does not depart from the principle of the present application, and therefore, the adjustment also falls within the protection scope of the present application. For example, the first predetermined difference may be 4 ℃ or 6 ℃, and the second predetermined difference may be 2 ℃ or 4 ℃.
As another example, in another alternative embodiment, although the above embodiment is described with reference to the preset speed threshold value being 60km/h as an example, it is found through research by the inventors that the speed threshold value can be adjusted for different vehicle types and vehicle air conditioners, so that a person skilled in the art can adjust the preset speed threshold value based on different vehicle types and application scenarios, so that the control method of the present application can meet more specific application scenarios. For example, the predetermined speed threshold may be any value from 40km/h to 80 km/h.
For another example, although the above embodiment is described with reference to the first preset rotation speed being the maximum rotation speed of the outer fan and the second preset rotation speed being the minimum rotation speed of the outer fan, the specific setting manner of the first preset rotation speed and the second preset rotation speed is not limited, and a person skilled in the art may adjust the first preset rotation speed and the second preset rotation speed as long as the adjusted technical solution satisfies the condition that the second preset rotation speed is less than the first preset rotation speed. For example, the first preset rotation speed may be obtained by multiplying the maximum rotation speed by a coefficient smaller than 1, and the second preset rotation speed may be obtained by multiplying the minimum rotation speed by a coefficient larger than 1.
A possible control procedure of the control method of the air conditioner external fan of the vehicle according to the present application will be described with reference to fig. 3. Fig. 3 is a logic diagram of a control method of an external air conditioner fan of a vehicle according to the present application.
As shown in fig. 3, in one possible control process, the vehicle air conditioner is operated in a cooling mode:
s201 is executed first, the running speed S of the vehicle is acquired, and S202 is executed.
S202, determine if S > S0? If not, executing S203; otherwise, if true, S206 is performed.
S203, the temperature Tin of the cab and the set temperature Tset are obtained, and then the difference between the two, i.e., Δ T = Tin-Tset, is calculated, and then S204 is performed.
S204, judging whether the temperature delta T is more than or equal to 5? If not, executing S205; otherwise, if true, S207 is executed.
S205, judging whether the temperature delta T is less than 3? If so, executing S208; otherwise, if not, S209 is executed.
And S206, controlling the outer fan to be closed, and exchanging heat for the radiator by means of air flow in the running process of the vehicle.
And S207, controlling the outer fan to operate at the maximum rotating speed.
And S208, controlling the outer fan to operate at the minimum rotating speed.
And S209, calculating the operation rotating speed R = n (S0/S) multiplied by R of the external fan, and controlling the external fan to operate at the calculated operation rotating speed R.
To sum up, this application is through the speed of traveling that obtains the vehicle under vehicle air conditioner open mode to when the speed of traveling is less than preset speed threshold, confirm the operating speed of outer fan based on the room temperature of driver's cabin and the difference in temperature of settlement temperature, the control method of this application can improve the control accuracy of outer fan, makes the rotational speed of outer fan and the speed of traveling of vehicle complementary each other, under the prerequisite of guaranteeing the air conditioner operation effect, reduces the vehicle power consumption.
It should be noted that, although the foregoing embodiments describe each step in the foregoing sequence, those skilled in the art can understand that, in order to achieve the effect of the present embodiment, different steps need not be executed in such sequence, and may be executed simultaneously (in parallel) or in reverse sequence, and these simple changes are all within the protection scope of the present application.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims of the present application, any of the claimed embodiments may be used in any combination.
So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.
Claims (10)
1. A control method of a vehicular air-conditioning outdoor unit, the vehicular air-conditioning outdoor unit including an indoor unit disposed in a cabin of a vehicle and an outdoor unit disposed outside the cabin, the outdoor unit including a radiator and an outdoor fan, a windward side of the radiator being disposed toward a forward direction of the vehicle, the control method comprising:
after the vehicle air conditioner is started, detecting the running speed of the vehicle;
comparing the running speed with a preset speed threshold value;
if the running speed is smaller than the preset speed threshold value, determining the running rotating speed of the outer fan based on the temperature difference between the room temperature and the set temperature of the cab;
and controlling the outer fan to operate at the operating rotating speed.
2. The control method of an air conditioner external fan for a vehicle according to claim 1, wherein the step of determining the operation rotation speed of the external fan based on the temperature difference between the room temperature of the cab and the set temperature further comprises:
and if the temperature difference is greater than or equal to a first preset difference threshold value, determining the running rotating speed of the outer fan to be a first preset rotating speed.
3. The control method of an air conditioner external fan of a vehicle as set forth in claim 2, wherein said first preset rotation speed is a maximum rotation speed of said external fan.
4. The control method of an air conditioner external fan for a vehicle according to claim 2, wherein the step of determining the operation rotation speed of the external fan based on the temperature difference between the room temperature of the cab and the set temperature further comprises:
and if the temperature difference is smaller than the first preset difference threshold value and larger than or equal to a second preset difference threshold value, determining the running rotating speed of the outer fan based on a first fitting formula.
5. The control method of an air conditioner external fan for a vehicle according to claim 4, wherein the step of determining the operation rotation speed of the external fan based on a first fitting formula further comprises:
calculating the operating speed of the outer fan based on the following formula:
r＝n(S0/S)×R
wherein r is the running rotating speed of the outer fan; s is the running speed of the vehicle; s0 is the preset speed threshold; r is the maximum rotating speed of the outer fan; n is a rotation speed coefficient and n is less than 1.
6. The control method of an air conditioner external fan for a vehicle according to claim 4, wherein the step of determining the operation rotation speed of the external fan based on the temperature difference between the room temperature of the cab and the set temperature further comprises:
if the temperature difference is smaller than the second preset difference threshold value, determining the running rotating speed of the outer fan to be a second preset rotating speed;
wherein the second preset rotating speed is less than the first preset rotating speed.
7. The control method of an air conditioner external fan of a vehicle as set forth in claim 6, wherein said second preset rotation speed is a minimum rotation speed of said external fan.
8. The method of claim 6, wherein the first predetermined difference threshold is any value between 4 ℃ and 6 ℃ and/or the second predetermined difference threshold is any value between 2 ℃ and 4 ℃.
9. The control method of an air conditioner external fan for a vehicle according to claim 1, characterized by further comprising:
and if the running speed is greater than or equal to the preset speed threshold value, controlling the outer fan to stop running.
10. The method for controlling an air conditioner external fan of a vehicle as set forth in claim 9, wherein the preset speed threshold is any value from 40km/h to 80 km/h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210910801.6A CN115257289A (en) | 2022-07-29 | 2022-07-29 | Control method of vehicle air conditioner external fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210910801.6A CN115257289A (en) | 2022-07-29 | 2022-07-29 | Control method of vehicle air conditioner external fan |
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