Control method of vehicle air conditioner and air conditioner

Abstract

The present application relates to air conditioning technical field, specifically disclose a kind of control method and air conditioner of vehicle air conditioner, to solve the problem that existing vehicle air conditioner and vehicle kinetic energy do not match.For this purpose, the control method of vehicle air conditioner of the present application includes the following steps: confirming whether vehicle air conditioner is in stable state;When vehicle air conditioner is in stable state, the load state of vehicle is obtained;According to the load state of vehicle, selectively control the operating state of vehicle air conditioner.The control method of vehicle air conditioner of the present application is in determining that air conditioner is in stable state in vehicle, then according to the load state of vehicle, the operating state of vehicle air conditioner is controlled, so that the operation of vehicle air conditioner and the kinetic energy of vehicle are matched, so that the use of vehicle air conditioner meets the demand while ensuring that vehicle has enough driving kinetic energy, improve the energy efficiency of vehicle air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically providing a control method and an air conditioner for a vehicle air conditioner. Background Technology

[0002] To enhance the driving experience, in-vehicle air conditioning is often added. When a vehicle, especially a small vehicle, is in motion, changes in load can affect its power output due to the use of the in-vehicle air conditioning.

[0003] The control process of existing car air conditioning systems is basically based on the temperature inside the car or the number of passengers. However, this control process does not take into account the vehicle's power conditions, resulting in relatively poor performance of the car air conditioning when the vehicle is under high load.

[0004] Therefore, there is an urgent need for a control method for vehicle air conditioning to solve the above-mentioned technical problems. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem of mismatch between existing vehicle air conditioning and vehicle kinetic energy.

[0006] To this end, a first aspect of the present invention provides a method for controlling a vehicle air conditioner, the vehicle air conditioner being installed in a vehicle, wherein the method for controlling the vehicle air conditioner includes the following steps:

[0007] Confirm that the vehicle air conditioner is in a stable state;

[0008] When the vehicle air conditioner is in a stable state, obtain the load status of the vehicle;

[0009] The operating status of the vehicle air conditioner is selectively controlled according to the vehicle's load status.

[0010] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the step of "obtaining the load status of the vehicle when the vehicle air conditioning is in a stable state" includes:

[0011] When the vehicle air conditioner is in a stable state, the load ratio of the vehicle is obtained, wherein the load ratio is used to characterize the load state.

[0012] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the step of "obtaining the load ratio of the vehicle" includes:

[0013] The vehicle's actual load and rated load are acquired in real time based on the vehicle's traction system, wherein the ratio of the actual load to the rated load is used to characterize the load ratio.

[0014] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the step of "selectively controlling the operating state of the vehicle air conditioning according to the load state of the vehicle" includes:

[0015] Based on the relationship between the load ratio and the set ratio, the operating status of the vehicle air conditioner is selectively controlled.

[0016] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the step of "selectively controlling the operating state of the vehicle air conditioning according to the relationship between the load ratio and the set ratio" includes:

[0017] When the load ratio is less than or equal to the set ratio, the first control logic is executed on the operating state of the vehicle air conditioner; and / or

[0018] When the load ratio is greater than the set ratio, the second control logic is executed on the operating status of the vehicle air conditioner.

[0019] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the vehicle air conditioning includes a compressor, an electronic expansion valve, and a fan;

[0020] The compressor and the electronic expansion valve are connected by a pipe, and the compressor is used to regulate the thermal energy of the refrigerant in the vehicle air conditioner.

[0021] The electronic expansion valve is used to control the flow rate of the refrigerant medium flowing to the compressor;

[0022] The fan is configured to regulate the flow rate of the airflow exiting the vehicle air conditioner;

[0023] The set ratio is 1;

[0024] The step of "executing the first control logic for the operating state of the vehicle air conditioner when the load ratio is less than or equal to the set ratio" includes:

[0025] When the load ratio is less than or equal to 1, the frequency of the compressor is adjusted from the first frequency to the second frequency, the opening of the electronic expansion valve is adjusted from the first opening to the second opening, and the speed of the fan is adjusted from the first speed to the second speed.

[0026] Wherein, the first frequency is greater than the second frequency, the first opening degree is less than the second opening degree, and the first rotational speed is less than the second rotational speed.

[0027] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the step of "executing second control logic for the operating state of the vehicle air conditioning when the load ratio is greater than the set ratio" includes:

[0028] When the load ratio is greater than 1, the frequency of the compressor is adjusted from the third frequency to the fourth frequency, the opening of the electronic expansion valve is adjusted from the third opening to the fourth opening, and the speed of the fan is adjusted from the third speed to the fourth speed.

[0029] Wherein, the third frequency is less than the fourth frequency, the third opening degree is greater than the fourth opening degree, and the third rotational speed is greater than the fourth rotational speed.

[0030] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the step of "confirming whether the vehicle air conditioning is in a stable state" includes:

[0031] The vehicle air conditioner operates in adaptive mode for a predetermined time, and after the temperature inside the vehicle reaches the preset temperature, the vehicle air conditioner enters a stable state.

[0032] In the preferred embodiment of the above-mentioned vehicle air conditioning control method, the vehicle air conditioning includes a temperature detection unit, which is disposed inside the vehicle.

[0033] The step of "the vehicle air conditioner operates in adaptive mode for a predetermined time, and after the temperature inside the vehicle reaches a preset temperature, the vehicle air conditioner enters a stable state" includes:

[0034] After receiving the power-on command, the vehicle air conditioner operates in an adaptive mode based on the preset temperature and the vehicle interior temperature. Within the predetermined time, once the temperature value detected by the temperature detection unit reaches the preset temperature, the vehicle air conditioner is determined to have entered a stable state.

[0035] A second aspect of the present invention provides an air conditioner including a processor and a memory, the memory being used to store computer-executable instructions that can be invoked and executed by the processor to implement the vehicle air conditioner control method described in the first aspect.

[0036] When the above technical solution is adopted, in the vehicle air conditioning control method and air conditioner of the present invention, under the premise of confirming that the vehicle air conditioning is in a stable state, the load state of the vehicle is obtained, and the operating state of the vehicle air conditioning is selectively and flexibly controlled according to the load state of the vehicle, so that the operation of the vehicle air conditioning matches the kinetic energy of the vehicle, ensuring that the vehicle has sufficient driving power while meeting the needs of the vehicle air conditioning, thereby effectively improving the energy efficiency of the vehicle air conditioning. Attached Figure Description

[0037] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0038] Figure 1 This is a flowchart illustrating the steps of a parking air conditioner control method according to an exemplary embodiment.

[0039] Figure 2 This is a logic diagram illustrating a control method for a parking air conditioner according to an exemplary embodiment.

[0040] Figure 3 This is a schematic diagram of the structure of an air conditioner according to an exemplary embodiment.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100. Air conditioner; 101. Processor; 102. Memory. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0045] An exemplary embodiment of the present invention provides a vehicle-mounted air conditioner for installation in a vehicle, which may be a truck, transport vehicle, or sedan, etc. The vehicle-mounted air conditioner can be the vehicle's air conditioning system, and its compressor can be driven by the vehicle's engine to achieve cooling.

[0046] A vehicle air conditioning system includes a compressor, an electronic expansion valve, and a fan. The compressor and electronic expansion valve are connected by a pipe; the compressor regulates the thermal energy of the refrigerant in the air conditioning system. The electronic expansion valve controls the flow rate of the refrigerant to the compressor. The fan is configured to regulate the flow rate of the air exiting the vehicle air conditioning system.

[0047] Furthermore, the vehicle's air conditioning system also includes a temperature detection unit, which is installed inside the vehicle to detect the interior temperature. There can be one or multiple temperature detection units. When there are multiple units, the average of the multiple temperature values ​​detected by these units can be used as the interior temperature of the vehicle. Alternatively, the highest and lowest temperatures can be removed, and the average of the remaining values ​​can be used as the interior temperature, thus improving the accuracy of the vehicle's interior temperature detection.

[0048] In one example, the temperature detection unit may include, but is not limited to, a temperature sensor, a temperature and humidity sensor, and a thermometer.

[0049] like Figure 1 As shown, an exemplary embodiment of the present invention provides a method for controlling a vehicle air conditioner. The method for controlling a vehicle air conditioner includes the following steps:

[0050] Step S100: Confirm that the vehicle air conditioner is in a stable state.

[0051] Step S200: When the vehicle air conditioner is in a stable state, obtain the vehicle's load status.

[0052] Step S300: Selectively control the operating status of the vehicle air conditioner according to the vehicle's load status.

[0053] In step S100, the stable state of the vehicle air conditioner can be indicated by the following: for example, the temperature inside the vehicle reaches the temperature value set by the user, and the temperature value inside the vehicle changes little over a certain period of time, thus indicating that the vehicle air conditioner is in a stable state. Alternatively, after a set time, the rotation frequency of the compressor in the vehicle air conditioner tends to stabilize, indicating that the vehicle air conditioner is in a stable state, etc.

[0054] It should be noted that when the vehicle's load suddenly increases, taking a sedan as an example, the number of passengers in the vehicle increases, and the power required to start the vehicle increases. At this time, when the vehicle's air conditioning is not yet in a stable state, the vehicle's power system needs to increase the power for both driving and operating the air conditioning. The sudden increase in power pressure may put a large load on the vehicle's power system or the operation of the air conditioning, thereby affecting the vehicle's driving or the use of the air conditioning.

[0055] When the vehicle's air conditioning is in a stable state, its output power tends to stabilize. Then, when adjusting the output power of the vehicle's air conditioning according to the vehicle's load, it has little impact on the vehicle's operating status.

[0056] In step S200, when the vehicle's air conditioning is in a stable state, the vehicle's load status can be obtained in real time using the vehicle's traction system to determine whether the vehicle is overloaded or not. Alternatively, the vehicle's load status can be obtained through other driving methods; for example, in the case of a truck or logistics vehicle, the load status can be fed back through the weight of the cargo.

[0057] In step S300, the operating status of the vehicle air conditioner can be flexibly controlled according to the vehicle's load status. For example, when the vehicle is not overloaded, the output power of the vehicle air conditioner can be partially increased so that the temperature inside the vehicle can quickly reach the required temperature range. When the vehicle is overloaded, the output power of the vehicle air conditioner can be partially reduced while ensuring the output of the air conditioner, thereby allowing the vehicle to obtain greater power output.

[0058] In this embodiment, after confirming that the vehicle air conditioner is in a stable state, the vehicle's load status is obtained. Then, based on the vehicle's load status, the operation status of the vehicle air conditioner is flexibly controlled so that the operation of the vehicle air conditioner matches the vehicle's kinetic energy. This ensures that the vehicle has sufficient driving power while meeting the needs of the vehicle air conditioner, thereby effectively improving the energy efficiency of the vehicle air conditioner.

[0059] like Figure 2 As shown, in some embodiments, the load state of a vehicle can be characterized by its load ratio. Specifically, the actual load F1 and rated load F of the vehicle can be obtained in real time based on the vehicle's traction system, and the ratio of the actual load F1 to the rated load F is used to characterize the vehicle's load ratio.

[0060] After obtaining the vehicle's load status based on the load ratio, the load ratio is compared with a set ratio, and the operating status of the vehicle's air conditioning is selectively controlled based on the comparison result.

[0061] Reference Figure 2 As shown, in one example, the process of comparing the load ratio with the set ratio, and the control of the operating status of the vehicle air conditioner, may include the following methods:

[0062] When the load ratio is less than or equal to the set ratio, the first control logic is executed on the operating status of the vehicle air conditioner.

[0063] The ratio is set to 1, meaning that when F1 / F≤1, it indicates that the vehicle's load fully meets the vehicle's usage requirements, or that the vehicle's load is not overloaded. In this case, the first control logic is executed to regulate the operation of the vehicle's air conditioning system.

[0064] In a specific example, the first control logic is as follows: adjust the frequency of the compressor in the vehicle air conditioner from a first frequency to a second frequency, where the first frequency is greater than the second frequency; adjust the opening of the electronic expansion valve from a first opening to a second opening, where the first opening is less than the second opening; and adjust the fan speed from a first speed to a second speed, where the first speed is less than the second speed.

[0065] In the process of reducing the frequency of the compressor, the frequency can be reduced according to a predetermined ratio, for example, the second frequency is any integer value between 50% and 80% of the first frequency. Alternatively, the frequency can be reduced according to a predetermined value, which can be an integer value between 1Hz and 5Hz, or the predetermined value can be reduced multiple times at the same interval.

[0066] Similarly, during the process of increasing the opening of the electronic expansion valve, it can be increased according to a predetermined opening, or the second opening can be any value between 105% and 150% of the first opening.

[0067] Furthermore, as the fan speed increases, the fan speed can be adjusted according to the fan's power setting, such as changing from a low speed setting to a high speed setting. Alternatively, the fan speed can be increased according to a set value, which can be any value between 300 rpm and 800 rpm.

[0068] It should be noted that the magnitudes of the first and second frequencies in this example are not specifically limited, as are the magnitudes of the first and second openings, the first rotational speed, and the second rotational speed.

[0069] In this embodiment, when the current load state of the vehicle is determined to be non-overloaded, that is, when the load ratio of the vehicle is less than or equal to the set ratio, the adjustment of the operating state of the vehicle air conditioner includes: reducing the frequency of the compressor, increasing the opening of the electronic expansion valve, and increasing the speed of the fan, thereby increasing the output power of the vehicle air conditioner while ensuring that the temperature of the coil in the vehicle air conditioner remains unchanged, effectively improving the energy efficiency ratio of the vehicle air conditioner.

[0070] When the load ratio is greater than the set ratio, the second control logic is executed on the operating status of the vehicle air conditioner.

[0071] In this example, during operation, the electronic components of the vehicle's air conditioning system function normally based on the distribution of the vehicle's power supply. The compressor and electronic expansion valve are powered by the vehicle's power supply, while the fan utilizes the engine's rotational speed for power output. In this case, when F1 / F > 1, it indicates that the vehicle is currently overloaded. During driving, the vehicle needs to increase its power output from the vehicle's power supply and reduce the engine's output to the air conditioning system to maximize the vehicle's driving power. Therefore, when F1 / F > 1, the second control logic is executed regarding the air conditioning system's operating status.

[0072] In a specific example, the second control logic is as follows: adjust the compressor frequency from the third frequency to the fourth frequency, where the third frequency is less than the fourth frequency; adjust the opening of the electronic expansion valve from the third opening to the fourth opening, where the third opening is greater than the fourth opening; and adjust the fan speed from the third speed to the fourth speed, where the third speed is greater than the fourth speed.

[0073] During the compressor's frequency increase process, the frequency can be increased according to a predetermined ratio, for example, the fourth frequency can be any integer value between 110% and 150% of the third frequency. Alternatively, the frequency can be increased according to a predetermined value, which can be an integer value between 1Hz and 5Hz, or the predetermined value can be increased multiple times at the same interval.

[0074] Similarly, during the process of reducing the opening of the electronic expansion valve, it can be reduced according to a predetermined opening, or the fourth opening can be any value between 40% and 80% of the third opening.

[0075] Furthermore, as the fan speed decreases, the fan speed can be adjusted according to the fan's power setting, such as changing from a high speed setting to a low speed setting. Alternatively, the fan speed can be reduced by a set value, which can be any value between 300 rpm and 800 rpm.

[0076] It should be noted that the magnitudes of the third and fourth frequencies in this example are not specifically limited, as are the magnitudes of the third and fourth openings, and the specific values ​​of the third and fourth rotational speeds.

[0077] In this embodiment, when the current load state of the vehicle is determined to be overloaded, that is, when the load ratio of the vehicle is greater than the set ratio, the adjustment of the operating state of the vehicle air conditioner includes: increasing the frequency of the compressor, reducing the opening of the electronic expansion valve, and reducing the speed of the fan, so as to reduce the energy efficiency allocated by the vehicle power system to the vehicle air conditioner, thereby ensuring the vehicle's driving power while ensuring that the temperature of the coil in the vehicle air conditioner remains unchanged, so that the operation of the vehicle air conditioner matches the vehicle's kinetic energy.

[0078] In one example, the third frequency may be the same as or different from the second frequency, and the first and fourth frequencies may be the same as or different. The first opening degree may be the same as or different from the fourth opening degree, and the third opening degree may be the same as or different from the second opening degree. Similarly, the first rotational speed may be the same as or different from the fourth rotational speed, and the second and third rotational speeds may be the same as or different.

[0079] like Figure 2 As shown, in some embodiments, the process of determining whether the vehicle air conditioner is in a stable state includes: the vehicle air conditioner operates in adaptive mode for a predetermined time, and after the temperature inside the vehicle reaches a preset temperature, it indicates that the vehicle air conditioner has entered a stable state.

[0080] The adaptive mode of the vehicle's air conditioning system allows vehicle users to adaptively control its operation based on their usage habits and environmental information. The preset temperature inside the vehicle can be flexibly set based on the user's habits or experience, and is not specifically limited here.

[0081] In one example, the temperature detection unit in the vehicle's air conditioning system can be used to obtain the interior temperature of the vehicle. When the air conditioning system receives the start-up command, it operates in adaptive mode based on the preset temperature and the interior temperature. After the temperature detection unit detects that the interior temperature has reached the preset temperature within a predetermined time during adaptive mode operation, the air conditioning system is considered to have entered a stable state. Once the air conditioning system has reached a stable state, its operation is flexibly controlled based on the relationship between the vehicle's load ratio and a set ratio. This ensures that the vehicle has sufficient driving power while maintaining optimal air conditioning operation, matching the air conditioning system's energy with the vehicle's kinetic energy, and rationally regulating the air conditioning system's energy efficiency.

[0082] like Figure 3 As shown, an exemplary embodiment of the present invention provides an air conditioner 100. The air conditioner 100 includes a processor 101 and a memory 102 connected to the processor 101. The memory 102 stores computer-executable instructions. These computer-executable instructions can be invoked by the processor 101 to execute the vehicle air conditioning control method described in the above embodiment.

[0083] In the above scheme, under the premise of confirming that the vehicle air conditioner is in a stable state, the vehicle's load status is obtained in real time using the vehicle's own traction system. The load status of the vehicle can be characterized by the relationship between the vehicle's load ratio and a set ratio, and the load ratio can be the ratio of the vehicle's actual load to its rated load.

[0084] When the ratio of the vehicle's actual load F1 to the rated load F is less than or equal to 1, that is, when F1 / F≤1, it indicates that the vehicle is not overloaded. At this time, the adjustment of the vehicle air conditioner's operating status includes: reducing the compressor frequency, increasing the opening of the electronic expansion valve, and increasing the fan speed. This increases the output power of the vehicle air conditioner while ensuring that the temperature of the coil in the vehicle air conditioner remains unchanged, effectively improving the energy efficiency ratio of the vehicle air conditioner.

[0085] When the ratio of the vehicle's actual load F1 to the rated load F is greater than 1, i.e., F1 / F > 1, it indicates that the vehicle's current load state is overloaded. At this time, the adjustment of the vehicle's air conditioning operation includes: increasing the compressor frequency, reducing the opening of the electronic expansion valve, and reducing the fan speed, so as to reduce the energy efficiency allocated by the vehicle's power system to the vehicle's air conditioning, thereby ensuring that the temperature of the coil in the vehicle's air conditioning remains unchanged while ensuring the vehicle's driving power, so that the operation of the vehicle's air conditioning matches the vehicle's kinetic energy.

[0086] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A method for controlling a vehicle air conditioner, wherein the vehicle air conditioner is installed in a vehicle, characterized in that, The vehicle air conditioner includes a compressor, an electronic expansion valve, and a fan; wherein the compressor and the electronic expansion valve are connected by a pipe, the compressor is used to regulate the thermal energy of the refrigerant in the vehicle air conditioner; the electronic expansion valve is used to control the flow rate of the refrigerant flowing to the compressor; the fan is configured to regulate the flow rate of the airflow exiting the vehicle air conditioner; the control method of the vehicle air conditioner includes the following steps: Confirm that the vehicle air conditioner is in a stable state; When the vehicle air conditioner is in a stable state, the actual load and rated load of the vehicle are obtained in real time based on the vehicle's traction system. The ratio of the actual load to the rated load is used to characterize the load ratio, and the load ratio is used to characterize the load status. Based on the relationship between the load ratio and the set ratio, the operating status of the vehicle air conditioner is selectively controlled; When the load ratio is less than or equal to the set ratio, the first control logic is executed on the operating state of the vehicle air conditioner; When the load ratio is greater than the set ratio, the second control logic is executed on the operating state of the vehicle air conditioner; the set ratio is 1. When the load ratio is greater than 1, the frequency of the compressor is adjusted from the third frequency to the fourth frequency, the opening of the electronic expansion valve is adjusted from the third opening to the fourth opening, and the speed of the fan is adjusted from the third speed to the fourth speed. Wherein, the third frequency is less than the fourth frequency, the third opening degree is greater than the fourth opening degree, and the third rotational speed is greater than the fourth rotational speed.

2. The control method for vehicle air conditioning according to claim 1, characterized in that, The step of "executing the first control logic for the operating state of the vehicle air conditioner when the load ratio is less than or equal to the set ratio" includes: When the load ratio is less than or equal to 1, the frequency of the compressor is adjusted from the first frequency to the second frequency, the opening of the electronic expansion valve is adjusted from the first opening to the second opening, and the speed of the fan is adjusted from the first speed to the second speed. Wherein, the first frequency is greater than the second frequency, the first opening degree is less than the second opening degree, and the first rotational speed is less than the second rotational speed.

3. The control method for vehicle air conditioning according to claim 1, characterized in that, The steps to "confirm whether the vehicle air conditioner is in a stable state" include: The vehicle air conditioner operates in adaptive mode for a predetermined time, and after the temperature inside the vehicle reaches the preset temperature, the vehicle air conditioner enters a stable state.

4. The control method for vehicle air conditioning according to claim 3, characterized in that, The vehicle air conditioner includes a temperature detection unit, which is located inside the vehicle. The step of "the vehicle air conditioner operates in adaptive mode for a predetermined time, and after the temperature inside the vehicle reaches a preset temperature, the vehicle air conditioner enters a stable state" includes: After receiving the power-on command, the vehicle air conditioner operates in an adaptive mode based on the preset temperature and the vehicle interior temperature. Within the predetermined time, once the temperature value detected by the temperature detection unit reaches the preset temperature, the vehicle air conditioner is determined to have entered a stable state.

5. An air conditioner, comprising a processor and a memory, the memory for storing computer-executable instructions, characterized in that, The computer-executable instructions can be called and executed by the processor to implement the vehicle air conditioning control method according to any one of claims 1-4.

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