Air conditioning control method and device for plug-in hybrid electric vehicle

Abstract

The application discloses a kind of air conditioner control method and device of plug-in hybrid electric vehicle, belong to automobile air conditioner control technical field.The method is applied to air conditioner control module, and includes: in response to air conditioner start instruction, control electric heater to work with first power;Real-time acquisition temperature in vehicle, and in the case where the temperature in vehicle is greater than first temperature threshold, control the electric heater to work with second power, wherein the first power is greater than the second power;In the case where the temperature in vehicle is greater than second temperature threshold, control the electric heater to work with third power, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power.The method can improve the cruising range of vehicle when using in winter.

Description

Technical Field

[0001] The present application relates to the technical field of automobile air-conditioning control, and in particular to an air-conditioning control method and device for a plug-in hybrid electric vehicle. Background Art

[0002] Plug-in hybrid electric vehicles (PHEVs) are an emerging new energy vehicle type that offers numerous advantages, including fuel efficiency and environmental benefits. Drivers can adjust the vehicle's air conditioning to ensure driving comfort.

[0003] In the prior art, when using a plug-in hybrid electric vehicle in pure electric mode in winter, using the air conditioner to raise the ambient temperature primarily involves using the air conditioning control module to control the vehicle's battery to heat the PTC water heater at high power (typically 70% to 100% of maximum power) for a long period of time. However, this method consumes a large amount of battery power, significantly depleting the power originally reserved for driving and severely affecting the vehicle's range. Summary of the Invention

[0004] In view of this, the present application provides an air conditioning control method and device for a plug-in hybrid electric vehicle to improve the vehicle's cruising range when used in winter.

[0005] Specifically, the following technical solutions are included:

[0006] In one aspect, an embodiment of the present application provides an air conditioning control method for a plug-in hybrid electric vehicle, which is applied to an air conditioning control module. The method includes:

[0007] In response to an air conditioner start-up instruction, controlling the electric heater to operate at a first power;

[0008] acquiring the temperature inside the vehicle in real time, and controlling the electric heater to operate at a second power when the temperature inside the vehicle is greater than a first temperature threshold, wherein the first power is greater than the second power;

[0009] When the vehicle interior temperature is greater than a second temperature threshold, the electric heater is controlled to operate at a third power, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power.

[0010] In some embodiments, after controlling the electric heater to operate at a third power when the vehicle interior temperature is greater than a second temperature threshold, the method further includes:

[0011] In response to the electric heater operating at the third power, controlling the timer to measure the first operating time of the electric heater;

[0012] In response to the first operating duration measured by the timer being equal to a preset duration, controlling the electric heater to operate at a second power, and controlling the timer to measure a second operating duration of the electric heater;

[0013] In response to the second operating duration measured by the timer being equal to the preset duration, the electric heater is controlled to operate at a third power.

[0014] In some embodiments, the method further comprises:

[0015] Responding to the air conditioning start instruction and obtaining the vehicle outside temperature;

[0016] When the outside temperature is lower than a third temperature threshold, determining a start mode of the air conditioner based on the air conditioner start instruction;

[0017] A circulation mode of the air conditioner is determined based on the startup mode of the air conditioner.

[0018] In some embodiments, the air conditioner startup mode includes remote startup and touch startup, and determining the air conditioner cycle mode based on the air conditioner startup mode includes:

[0019] In response to the air conditioner being started in a remote start mode, determining the air conditioner circulation mode to be full internal circulation;

[0020] In response to the air conditioner being started in a touch-activated mode, obtaining a humidity inside the vehicle, and determining a fogging risk probability inside the vehicle based on the humidity inside the vehicle;

[0021] When the risk probability of fogging inside the vehicle is greater than a first risk threshold, determining the circulation mode of the air conditioner to be full external circulation;

[0022] When the risk probability of fogging in the vehicle is less than or equal to the first risk threshold, the circulation mode of the air conditioner is determined to be partial internal circulation.

[0023] In some embodiments, determining the air conditioner startup method based on the air conditioner startup instruction includes:

[0024] In response to the air conditioner start instruction including a remote start identifier, determining that the start mode of the air conditioner is remote start;

[0025] In response to the air conditioner start instruction including a touch start identifier, the start mode of the air conditioner is determined to be touch start.

[0026] In some embodiments, the method further comprises:

[0027] Responding to the air conditioning start instruction, and obtaining the outside temperature and the inside humidity of the vehicle;

[0028] determining a risk probability of fogging in the vehicle based on the humidity in the vehicle;

[0029] In response to the vehicle exterior temperature being within a preset temperature range and the vehicle interior fogging risk probability being less than a first risk threshold, determining that the air outlet mode of the air conditioner is a foot blowing mode;

[0030] In response to the vehicle exterior temperature being within the preset temperature range and the vehicle interior fogging risk probability being greater than or equal to the first risk threshold and less than a second risk threshold, determining that the air outlet mode of the air conditioner is a foot-blowing defrost mode;

[0031] In response to the outside temperature being within the preset temperature range and the risk probability of fogging inside the vehicle being greater than or equal to the second risk threshold, the compressor is started and the air outlet mode of the air conditioner is determined to be a full defrost mode.

[0032] In some embodiments, the first risk threshold value ranges from 68% to 72%, and the second risk threshold value ranges from 78% to 82%.

[0033] In some embodiments, the preset temperature range is 0-12°C.

[0034] In some embodiments, the first temperature threshold value ranges from 17 to 19° C., and the second temperature threshold value ranges from 19 to 21° C.

[0035] On the other hand, an embodiment of the present application further provides an air conditioning control device for a plug-in hybrid electric vehicle, which is applied to an air conditioning control module. The device includes:

[0036] a first power control module, configured to control the electric heater to operate at a first power in response to an air conditioner start instruction;

[0037] a second power control module, configured to obtain the vehicle interior temperature in real time, and control the electric heater to operate at a second power when the vehicle interior temperature is greater than a first temperature threshold, wherein the first power is greater than the second power;

[0038] The third power control module is used to control the electric heater to operate at a third power when the temperature inside the vehicle is greater than a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power.

[0039] The beneficial effects of the technical solutions provided by the embodiments of the present application include at least:

[0040] The air conditioning control method for a plug-in hybrid electric vehicle provided in an embodiment of the present application, after receiving an air conditioning start command, the air conditioning control module controls the electric heater to operate at a step-by-step decreasing power by comparing the temperature inside the vehicle with multiple temperature thresholds, gradually reducing the power used by the electric heater to reduce the power consumption of the entire vehicle battery in winter, thereby improving the cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 A flowchart of an air conditioning control method for a plug-in hybrid electric vehicle provided in an embodiment of the present application;

[0043] Figure 2 A flowchart of another method for controlling air conditioning in a plug-in hybrid electric vehicle provided in an embodiment of the present application;

[0044] Figure 3 A schematic structural diagram of an air conditioning control device for a plug-in hybrid electric vehicle provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical terms used in the examples of this application have the same meanings as those commonly understood by those skilled in the art. Some technical terms that appear in the examples of this application are explained below.

[0047] In order to make the technical solutions and advantages of the present application clearer, the implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0048] With increasing environmental protection requirements both domestically and internationally, consumers are increasingly opting for plug-in hybrid vehicles (PHEVs) that offer superior ride comfort, excellent fuel economy, and high driving safety. At the same time, the range of PHEVs has become a crucial consideration for consumers when choosing a vehicle. In pure electric mode, PHEVs draw their energy entirely from the onboard battery. The onboard air conditioner, however, heats the coolant using a high-power electric heater. This process consumes significant battery power, reducing the vehicle's range. Therefore, improving the air conditioning control methods for PHEVs in pure electric mode has become a crucial prerequisite for their widespread adoption.

[0049] In the prior art, when using a plug-in hybrid vehicle in winter, if the vehicle's air conditioning is activated in pure electric mode to raise the interior temperature, this is achieved primarily by using the air conditioning control module to control the vehicle's battery to heat the electric heater for a long period of time at high power (typically 70% to 100% of maximum power). However, this method consumes a large amount of the vehicle's battery power, significantly depleting the power originally intended for driving and significantly reducing the vehicle's range.

[0050] In order to solve the technical problems existing in the related art, the embodiment of the present application provides an air conditioning control method for a plug-in hybrid electric vehicle, which can improve the vehicle's range when used in winter. The method is applicable to low-temperature environments and when the vehicle is used in pure electric mode. At the same time, the method is applied to the air conditioning control module. Among them, the air conditioning control module is part of the air conditioning thermal management system, and its functions include: detecting the temperature of the coolant, detecting the temperature inside and outside the vehicle, controlling the power used by the electric heater, controlling the air outlet mode of the air damper inside the vehicle, and controlling the switch of the compressor.

[0051] Figure 1 This is a flow chart of a plug-in hybrid electric vehicle air conditioning control method provided in an embodiment of the present application. Figure 1 The method is applied to an air conditioning control module and comprises the following steps:

[0052] Step 101: In response to an air conditioner start instruction, control the electric heater to operate at a first power.

[0053] Step 102 , obtaining the temperature inside the vehicle in real time, and when the temperature inside the vehicle is greater than a first temperature threshold, controlling the electric heater to operate at a second power, wherein the first power is greater than the second power.

[0054] Step 103 : When the temperature inside the vehicle is greater than a second temperature threshold, control the electric heater to operate at a third power, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power.

[0055] Therefore, in the air conditioning control method for a plug-in hybrid electric vehicle provided in an embodiment of the present application, after receiving an air conditioning start command, the air conditioning control module controls the electric heater to operate at a step-by-step decreasing power by comparing the temperature inside the vehicle with multiple temperature thresholds, gradually reducing the power used by the electric heater to reduce the power consumption of the vehicle battery in winter, thereby improving the cruising range.

[0056] Figure 2 This is a flow chart of another plug-in hybrid electric vehicle air conditioning control method provided in an embodiment of the present application. This method is applicable to low temperature environments and the vehicle is used in pure electric mode. Figure 2 , this method is applied to the air conditioning control module and includes the following steps:

[0057] Step 201: In response to an air conditioner start instruction, control the electric heater to operate at a first power.

[0058] In a low-temperature environment, especially in winter, when the plug-in hybrid vehicle is in pure electric mode, the air conditioner heats the coolant by heating it with an electric heater. By controlling the electric heater to operate at a first power, the heating function of the air conditioner can be turned on.

[0059] In some embodiments, the first power may be 50% of the maximum power, wherein the maximum power may be 5 kW. Meanwhile, the electric heater operating at the first power here may be considered to be operating in the third gear mode.

[0060] In some embodiments, the electric heater is a PTC water heater.

[0061] It is understandable that after receiving the air conditioning start-up instruction, the air conditioning control module can control the electric heater to start and operate at the first power to heat the coolant.

[0062] While step 201 is being performed, in order to improve the vehicle's cruising range, it is necessary to simultaneously determine the air conditioning circulation mode and the air conditioning outlet mode. Therefore, the air conditioning control method for a plug-in hybrid electric vehicle provided in the embodiment of the present application further includes the steps of determining the air conditioning circulation mode and determining the air conditioning outlet mode, which are specifically as follows:

[0063] (1) Determine the air conditioning circulation mode

[0064] Step 1: respond to the air conditioning start command and obtain the outside temperature of the vehicle.

[0065] After receiving the air conditioning start command, the air conditioning control module synchronously obtains the outside temperature of the vehicle.

[0066] It is understandable that the outside temperature is obtained by a temperature sensor located outside the vehicle and transmitted to the air conditioning control module through the vehicle bus.

[0067] Step 2: When the outside temperature of the vehicle is lower than the third temperature threshold, the air conditioner start mode is determined based on the air conditioner start instruction.

[0068] Due to the low temperature in winter, in order to prevent fogging in the car and affecting the driver's driving, it is necessary to first determine the air conditioning startup method to further determine the air conditioning circulation method.

[0069] Among them, the air conditioner startup methods include remote start and touch start.

[0070] This step includes the following two different startup methods, specifically: in response to the air conditioner startup instruction containing a remote startup identifier, determining that the startup method of the air conditioner is remote startup; in response to the air conditioner startup instruction containing a touch startup identifier, determining that the startup method of the air conditioner is touch startup.

[0071] When the air conditioner is started remotely, it means that the driver is not in the car. The driver can send an air conditioner start instruction to the air conditioner control module by operating a terminal connected to the vehicle network (such as a mobile phone). At this time, there is no need to judge the impact of fogging on the driver; when the air conditioner is started by touch, it means that the driver is in the car. The driver starts the air conditioner by touching the air conditioner start button, which means that the driver is very likely to drive the vehicle. At this time, it is necessary to further determine the risk probability of fogging in the car to determine the circulation mode of the air conditioner. While ensuring that the glass in the car is not fogged, the auxiliary electric heater can achieve rapid heating.

[0072] Step 3: Determine the air conditioning circulation mode based on the air conditioning startup mode.

[0073] Among them, the circulation modes of air conditioning include internal circulation and external circulation.

[0074] This step specifically includes: in response to the air conditioner starting mode being remote start, determining the air conditioner circulation mode to be full internal circulation; in response to the air conditioner starting mode being touch start, obtaining the humidity inside the car, and determining the risk probability of fogging inside the car based on the humidity inside the car; when the risk probability of fogging inside the car is greater than a first risk threshold, determining the air conditioner circulation mode to be full external circulation; when the risk probability of fogging inside an empty car is less than or equal to the first risk threshold, determining the air conditioner circulation mode to be partial internal circulation.

[0075] When it is determined that the starting mode of the air conditioner is the remote starting, the heating speed in the vehicle can be improved through the all-internal-circulation air circulation mode without considering the factors of the driver, and the electric heater can be assisted to realize the rapid heating; when it is determined that the starting mode of the air conditioner is the touch starting, the humidity sensor in the vehicle connected to the air conditioner control module through the CAN network is used to obtain the humidity in the vehicle, so that the air conditioner control module substitutes the humidity in the vehicle into the fogging risk module to obtain the fogging risk probability in the vehicle. When the fogging risk probability in the vehicle is greater than the first risk threshold, it indicates that the fogging risk in the vehicle is greater, and therefore the air circulation mode of the air conditioner is determined as the all-external-circulation to avoid the fogging in the vehicle affecting the driving of the driver; when the fogging risk probability in the vehicle is less than or equal to the first risk threshold, it indicates that the fogging risk in the vehicle is smaller, and therefore the air circulation mode of the air conditioner is determined as the partial-internal-circulation to reduce the energy consumption and improve the heating speed in the vehicle, and the electric heater can be assisted to realize the rapid heating.

[0076] In the embodiments of the present application, the partial-internal-circulation here can be 50% of the internal circulation.

[0077] In some embodiments, the first risk threshold has a value range of 68% to 72%. For example, the first risk threshold can be 70%.

[0078] (2) Determining the air outlet mode of the air conditioner

[0079] Step one, in response to the air conditioner starting instruction, the outside temperature and the humidity in the vehicle are obtained.

[0080] The obtaining method of the outside temperature and the humidity in the vehicle is the same as the obtaining method in the determination of the air circulation mode of the air conditioner, which will not be described here.

[0081] Step two, based on the humidity in the vehicle, the fogging risk probability in the vehicle is determined.

[0082] Since the air conditioner control module is built-in with the fogging risk module, the fogging risk probability in the vehicle can be calculated based on the humidity in the vehicle, and therefore the value of the fogging risk probability in the vehicle can be obtained.

[0083] Step three, in response to the outside temperature being located in the preset temperature range and the fogging risk probability in the vehicle being less than the first risk threshold, the air outlet mode of the air conditioner is determined as the foot blowing mode.

[0084] The preset temperature range can be 0 to 12℃, which can correspond to the low-temperature environment in spring and autumn.

[0085] In the prior art, plug-in hybrid electric vehicles typically keep the compressor on at all times within a preset temperature range to prevent fogging of the interior windows, which could affect driver safety. However, keeping the compressor on at all times causes it to operate at high load for extended periods, which can lead to rapid battery drain and reduce vehicle battery range. Therefore, to avoid prolonged compressor load and ensure a fog-free interior, the compressor's on-time can be refined by determining the probability of fogging risk, thereby reducing its operating time.

[0086] When the risk probability of fogging inside the car is less than the first risk threshold, it means that the risk of fogging inside the car is relatively low. The air-conditioning outlet mode can be determined to be the foot-blowing mode, and there is no need to start the compressor at this time.

[0087] In some embodiments, the first risk threshold value ranges from 68% to 72%. For example, the first risk threshold value may be 70%.

[0088] Step 4: In response to the outside temperature being within a preset temperature range and the risk probability of fogging inside the vehicle being greater than or equal to a first risk threshold and less than a second risk threshold, the air outlet mode of the air conditioner is determined to be a foot-blowing defrost mode.

[0089] When the risk probability of fogging in the car is greater than or equal to the first risk threshold and less than the second risk threshold, it means that there is a certain risk of fogging in the car at this time, so the air outlet mode of the air conditioner is determined to be the foot-blowing defrost mode, and there is no need to start the compressor at this time.

[0090] In some embodiments, the second risk threshold value ranges from 78% to 82%. For example, the second risk threshold value may be 80%.

[0091] Step 5: In response to the outside temperature being within a preset temperature range and the risk probability of fogging inside the vehicle being greater than or equal to a second risk threshold, the compressor is started and the air outlet mode of the air conditioner is determined to be a full defrost mode.

[0092] When the risk probability of fogging inside the vehicle is greater than the second risk threshold, it indicates that the risk of fogging inside the vehicle is relatively high, and therefore the compressor needs to be started and the air outlet mode needs to be switched to the full defrost mode.

[0093] Therefore, in the embodiment of the present application, the compressor will only start when the risk probability of fogging in the vehicle is greater than or equal to the second risk threshold, avoiding the long-term load operation of the compressor in the related technology, not only ensuring that there is no fogging in the vehicle, but also reducing the battery power consumption, thereby improving the battery life of the entire vehicle.

[0094] Step 202 , obtaining the temperature inside the vehicle in real time, and when the temperature inside the vehicle is greater than a first temperature threshold, controlling the electric heater to operate at a second power, wherein the first power is greater than the second power.

[0095] When the temperature inside the vehicle is greater than the first temperature threshold, it means that the temperature inside the vehicle has been significantly increased. At this time, the electric heater no longer needs to continue working at the first power. Working at a second power that is lower than the first power can meet the heating demand, thereby reducing the power consumption of the vehicle battery and improving the vehicle's cruising range.

[0096] It should be noted that “real-time acquisition of the vehicle interior temperature” here refers to periodically acquiring the vehicle interior temperature at a frequency of 100 ms.

[0097] In some embodiments, the second power may be 33% of the maximum power, wherein the maximum power may be 5 kW. Meanwhile, the electric heater operating at the second power here may be considered to be operating in the second gear mode.

[0098] In some embodiments, the first temperature threshold value ranges from 17° C. to 19° C. For example, the first temperature threshold value may be 18° C.

[0099] Step 203 : When the temperature inside the vehicle is greater than a second temperature threshold, control the electric heater to operate at a third power, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power.

[0100] When the temperature inside the vehicle is greater than the second temperature threshold, it means that the temperature inside the vehicle is high. At this time, the electric heater no longer needs to continue working at the second power. Working at a third power that is lower than the second power can meet the heating demand, thereby realizing a step-by-step decrease in the power used by the electric heater, reducing the power used by the electric heater, reducing the power consumption of the entire vehicle battery, and improving the vehicle's cruising range.

[0101] In some embodiments, the third power may be 17% of the maximum power, where the maximum power may be 5 kW. The electric heater operating at the third power level can be considered to be operating in the first gear mode. Therefore, as the gear level increases, the power usage of the electric heater increases accordingly.

[0102] In some embodiments, the second temperature threshold value ranges from 19° C. to 21° C. For example, the second temperature threshold value may be 20° C.

[0103] Step 204 : In response to the electric heater operating at the third power, controlling the timer to measure the first operating time of the electric heater.

[0104] Since the temperature of the external environment in winter is low, and the third power has a small power value, if the electric heater always works at the third power, the temperature in the vehicle will decrease to a certain extent after working for a period of time, and it is difficult to maintain a relatively comfortable driving environment, so the time for which the electric heater works at the third power needs to be controlled, so that the power value is adjusted after working for a certain time.

[0105] It can be understood that the timer is located in the air conditioning thermal management system and is connected with the air conditioning control module. In addition, the preset time length is built in the timer.

[0106] In some embodiments, the preset time length can be 5 minutes. Of course, the preset time length can also have other values, which can be selectively set according to actual needs, and are not specifically limited here.

[0107] Step 205, in response to the first working time measured by the timer being equal to the preset time length, controlling the electric heater to work at the second power, and controlling the timer to measure the second working time of the electric heater.

[0108] When the electric heater works at the third power for the preset time length, the power value of the electric heater is changed to work at the second power, and the working time of the electric heater at the second power is continued, that is, the electric heater cannot always work at a large power output, which affects the power of the battery. It can be understood that when the electric heater works at the second power, it outputs more heat energy, which can make up for the lack of heat when the electric heater works at the third power.

[0109] Step 206, in response to the second working time measured by the timer being equal to the preset time length, controlling the electric heater to work at the third power.

[0110] When the electric heater works at the second power for the preset time length, the temperature in the vehicle has reached a high level again, and at this time, the working power of the electric heater is switched from the second power to the third power, which can reduce the energy consumption of the electric heater and the power consumption of the battery, thereby improving the battery range.

[0111] Through steps 204-206, it can be seen that after the electric heater works at the third power, it will enter a process of alternating circulation between the third power and the second power, so that the temperature in the vehicle is always in a temperature range that the driver feels comfortable, that is, the comfort of the vehicle environment is ensured, and the battery range of the vehicle in the pure electric mode is optimized and improved.

[0112] In summary, the air conditioning control method for a plug-in hybrid electric vehicle provided in the embodiment of the present application, after receiving the air conditioning start command, the air conditioning control module controls the electric heater to operate at a step-by-step decreasing power by comparing the vehicle interior temperature with multiple temperature thresholds, gradually reducing the power used by the electric heater to reduce the power consumption of the vehicle battery in winter, thereby improving the cruising range.

[0113] The present application also provides an air conditioning control device for a plug-in hybrid electric vehicle. Figure 3 The air conditioning control device 300 of the plug-in hybrid electric vehicle includes:

[0114] The first control module 301 is configured to control the electric heater to operate at a first power in response to an air conditioner start instruction.

[0115] The second control module 302 is configured to obtain the vehicle interior temperature in real time, and control the electric heater to operate at a second power when the vehicle interior temperature is greater than a first temperature threshold, wherein the first power is greater than the second power.

[0116] The third control module 303 is configured to control the electric heater to operate at a third power when the temperature inside the vehicle is greater than a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power.

[0117] In some embodiments, the air conditioning control device 300 for the plug-in hybrid electric vehicle further includes:

[0118] a first duration control module, configured to control a timer to measure a first operating duration of the electric heater in response to the electric heater operating at a third power;

[0119] a second duration control module, configured to control the electric heater to operate at a second power in response to the first operating duration measured by the timer being equal to a preset duration, and to control the timer to measure a second operating duration of the electric heater;

[0120] The third duration control module is configured to control the electric heater to operate at a third power in response to the second operating duration measured by the timer being equal to a preset duration.

[0121] In some embodiments, the air conditioning control device 300 for the plug-in hybrid electric vehicle further includes:

[0122] a temperature acquisition module, configured to respond to an air-conditioning start instruction and acquire the vehicle outside temperature;

[0123] a start-up mode determination module, configured to determine a start-up mode of the air conditioner based on the air conditioner start-up instruction when the outside temperature of the vehicle is less than a third temperature threshold;

[0124] The circulation mode determination module is used to determine the circulation mode of the air conditioner based on the startup mode of the air conditioner.

[0125] In some embodiments, the air conditioner startup mode includes remote startup and touch startup, and the cycle mode determination module includes:

[0126] a first determining submodule, configured to determine, in response to the air conditioner being started in a remote start mode, that the air conditioner's circulation mode is a full internal circulation mode;

[0127] a fogging risk determination submodule, configured to obtain the humidity inside the vehicle in response to the air conditioner being started in a touch-activated mode, and determine a fogging risk probability inside the vehicle based on the humidity inside the vehicle;

[0128] The second determining submodule is configured to determine that the circulation mode of the air conditioner is a full external circulation when the risk probability of fogging in the vehicle is greater than a first risk threshold;

[0129] The third determining submodule is configured to determine that the circulation mode of the air conditioner is partial internal circulation when the risk probability of fogging in the vehicle is less than or equal to a first risk threshold.

[0130] In some embodiments, the startup mode determination module includes:

[0131] a remote start submodule, configured to determine that the air conditioner start mode is remote start in response to the air conditioner start instruction including the remote start identifier;

[0132] The touch start submodule is configured to determine that the air conditioner start mode is touch start in response to the air conditioner start instruction including the touch start identifier.

[0133] In some embodiments, the air conditioning control device 300 for the plug-in hybrid electric vehicle further includes:

[0134] A temperature and humidity acquisition module, configured to respond to an air-conditioning start instruction and acquire the outside temperature and the inside humidity of the vehicle;

[0135] A fogging risk determination module, configured to determine a fogging risk probability inside the vehicle based on the humidity inside the vehicle;

[0136] a first mode determination module, configured to determine that the air outlet mode of the air conditioner is a foot blowing mode in response to the vehicle exterior temperature being within a preset temperature range and the vehicle interior fogging risk probability being less than a first risk threshold;

[0137] a second mode determination module, configured to determine that the air outlet mode of the air conditioner is a foot-blowing defrost mode in response to the vehicle outside temperature being within a preset temperature range and the vehicle interior fogging risk probability being greater than or equal to a first risk threshold and less than a second risk threshold;

[0138] The third mode determination module is used to start the compressor and determine that the air outlet mode of the air conditioner is the full defrost mode in response to the outside temperature being within a preset temperature range and the risk probability of fogging inside the vehicle being greater than or equal to a second risk threshold.

[0139] In some embodiments, the first risk threshold value ranges from 68% to 72%, and the second risk threshold value ranges from 78% to 82%.

[0140] In some embodiments, the preset temperature range is 0-12°C.

[0141] In some embodiments, the first temperature threshold ranges from 17 to 19°C, and the second temperature threshold ranges from 19 to 21°C.

[0142] Therefore, the air conditioning control device for a plug-in hybrid electric vehicle provided in the embodiment of the present application can control the electric heater to operate at a step-by-step decreasing power, gradually reducing the power usage of the electric heater to reduce the power consumption of the vehicle battery in winter, thereby improving the cruising range.

[0143] The embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. The computer program is stored in a memory, and is loaded and executed by a processor. The air conditioning control method for a plug-in hybrid electric vehicle provided in the above embodiment, for example Figure 1 or Figure 2 The method shown.

[0144] The embodiment of the present application further provides an on-board computer program product containing instructions. When the on-board computer program product is run on an on-board computer, the on-board computer can execute the air conditioning control method for a plug-in hybrid electric vehicle provided by the above method embodiment, for example Figure 1 or Figure 2 The method shown.

[0145] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0146] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0147] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the present invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only.

[0148] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for controlling air conditioning of a plug-in hybrid electric vehicle, characterized in that: Applied to an air conditioning control module, the method includes: In response to an air conditioner start-up instruction, controlling the electric heater to operate at a first power; acquiring the temperature inside the vehicle in real time, and controlling the electric heater to operate at a second power when the temperature inside the vehicle is greater than a first temperature threshold, wherein the first power is greater than the second power; When the vehicle interior temperature is greater than a second temperature threshold, controlling the electric heater to operate at a third power, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power; The method further comprises: Responding to the air conditioning start instruction and obtaining the vehicle outside temperature; When the outside temperature is lower than a third temperature threshold, determining a start mode of the air conditioner based on the air conditioner start instruction; determining a circulation mode of the air conditioner based on a startup mode of the air conditioner; The air conditioner start mode includes remote start and touch start; The circulation mode includes internal circulation and external circulation; The determining of the circulation mode of the air conditioner based on the startup mode of the air conditioner includes: In response to the air conditioner being started in a remote start mode, determining the air conditioner circulation mode to be full internal circulation; In response to the air conditioner being started in a touch-activated mode, obtaining a humidity inside the vehicle, and determining a fogging risk probability inside the vehicle based on the humidity inside the vehicle; When the risk probability of fogging inside the vehicle is greater than a first risk threshold, determining the circulation mode of the air conditioner to be full external circulation; When the risk probability of fogging in the vehicle is less than or equal to the first risk threshold, the circulation mode of the air conditioner is determined to be partial internal circulation.

2. The air conditioning control method for a plug-in hybrid electric vehicle according to claim 1, characterized in that: After controlling the electric heater to operate at a third power when the vehicle interior temperature is greater than a second temperature threshold, the method further includes: In response to the electric heater operating at the third power, controlling the timer to measure the first operating time of the electric heater; In response to the first operating duration measured by the timer being equal to a preset duration, controlling the electric heater to operate at a second power, and controlling the timer to measure a second operating duration of the electric heater; In response to the second operating duration measured by the timer being equal to the preset duration, the electric heater is controlled to operate at a third power.

3. The air conditioning control method for a plug-in hybrid electric vehicle according to claim 1, characterized in that: The determining of the air conditioner startup mode based on the air conditioner startup instruction includes: In response to the air conditioner start instruction including a remote start identifier, determining that the start mode of the air conditioner is remote start; In response to the air conditioner start instruction including a touch start identifier, the start mode of the air conditioner is determined to be touch start.

4. The air conditioning control method for a plug-in hybrid electric vehicle according to claim 1, characterized in that: The method further comprises: Responding to the air conditioning start instruction, and obtaining the outside temperature and the inside humidity of the vehicle; determining a risk probability of fogging in the vehicle based on the humidity in the vehicle; In response to the vehicle exterior temperature being within a preset temperature range and the vehicle interior fogging risk probability being less than a first risk threshold, determining that the air outlet mode of the air conditioner is a foot blowing mode; In response to the vehicle exterior temperature being within the preset temperature range and the vehicle interior fogging risk probability being greater than or equal to the first risk threshold and less than a second risk threshold, determining that the air outlet mode of the air conditioner is a foot-blowing defrost mode; In response to the outside temperature being within the preset temperature range and the risk probability of fogging inside the vehicle being greater than or equal to the second risk threshold, the compressor is started and the air outlet mode of the air conditioner is determined to be a full defrost mode.

5. The air conditioning control method for a plug-in hybrid electric vehicle according to claim 4, characterized in that: The value range of the first risk threshold is 68%~72%, and the value range of the second risk threshold is 78%~82%.

6. The air conditioning control method for a plug-in hybrid electric vehicle according to claim 4, characterized in that: The preset temperature range is 0~12℃.

7. The air conditioning control method for a plug-in hybrid electric vehicle according to claim 1, characterized in that: The first temperature threshold value ranges from 17°C to 19°C, and the second temperature threshold value ranges from 19°C to 21°C.

8. An air conditioning control device for a plug-in hybrid electric vehicle, characterized in that: Applied to an air conditioning control module, the device comprises: a first power control module, configured to control the electric heater to operate at a first power in response to an air conditioner start instruction; a second power control module, configured to obtain the vehicle interior temperature in real time, and control the electric heater to operate at a second power when the vehicle interior temperature is greater than a first temperature threshold, wherein the first power is greater than the second power; a third power control module, configured to control the electric heater to operate at a third power when the vehicle interior temperature is greater than a second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold, and the second power is greater than the third power; The device is further configured to respond to the air conditioning start instruction and obtain the vehicle exterior temperature; determine an air conditioning start mode based on the air conditioning start instruction when the vehicle exterior temperature is less than a third temperature threshold; and determine an air conditioning circulation mode based on the air conditioning start mode; the air conditioning start modes include remote start and touch start; and the circulation modes include internal circulation and external circulation. The determining of the circulation mode of the air conditioner based on the startup mode of the air conditioner includes: In response to the air conditioner being started in a remote start mode, determining the air conditioner circulation mode to be full internal circulation; In response to the air conditioner being started in a touch-activated mode, obtaining a humidity inside the vehicle, and determining a fogging risk probability inside the vehicle based on the humidity inside the vehicle; When the risk probability of fogging inside the vehicle is greater than a first risk threshold, determining the circulation mode of the air conditioner to be full external circulation; When the risk probability of fogging in the vehicle is less than or equal to the first risk threshold, the circulation mode of the air conditioner is determined to be partial internal circulation.

Images