Truck air conditioner control method, device and equipment and computer readable storage medium

Abstract

The invention discloses a truck air conditioner control method, device and equipment and a computer readable storage medium, and belongs to the field of vehicle control. The method comprises the steps that the target rotating speed of an electric air conditioner compressor is determined according to the engine state, the truck air conditioner system state, the user set temperature and the temperature in a cab; the electric air conditioner compressor is operated according to the target rotating speed so that the electric air conditioner compressor can compress the refrigerant into a high-pressure refrigerant, and the high-pressure refrigerant is conveyed into an air conditioner condenser; the air conditioner condenser condenses a high-pressure refrigerant into a high-pressure liquid refrigerant and transmits the high-pressure liquid refrigerant to the air conditioner evaporator; after absorbing heat of a cab, a high-pressure liquid refrigerant in the air conditioner evaporator is converted into a low-pressure gas refrigerant and is transmitted back to the electric air conditioner compressor, so that the cab is refrigerated when a truck is in a running or parking state, and the cooling effect and the cooling efficiency can be improved under the parking refrigeration working condition; and the power performance and the climbing performance of the engine can be improved under the driving refrigeration working condition.

Description

Technical Field

[0001] The present application relates to the field of vehicle control technology, and in particular to a truck air conditioning control method, device, equipment and computer-readable storage medium. Background Art

[0002] For trucks, when the outside temperature is high, whether driving or parking, users need to turn on the vehicle's air conditioning system to cool the cab to provide a relatively comfortable environment.

[0003] In the prior art, truck air conditioning systems include two categories. One is to install two air conditioning systems at the same time, which are used to cool the cab when parking and driving, respectively, such as using a roof-mounted air conditioner or a split parking air conditioner to cool the cab when parking, and using a driving air conditioner to cool the cab when driving; the other is to install a dual-system air conditioner for both parking and driving, which includes two air conditioning compressors, one is an electric air conditioning compressor, and the other is a mechanical air conditioning compressor, wherein the electric air conditioning compressor is used to cool the cab when parking, and the mechanical air conditioning compressor is used to cool the cab when driving.

[0004] However, the roof-mounted air conditioner is heavy, has high requirements on the strength of the roof and takes up the installation space of the skylight; the split-type parking air conditioner is heavy and takes up a certain amount of space in the cab; the dual-system air conditioner with both driving and parking functions has a relatively complex structure, and the engine belt drives the mechanical air-conditioning compressor to cool the air-conditioning system when driving, resulting in a reduction in the engine's power output, and causing the mechanical air-conditioning compressor to stop and start from time to time, resulting in a relatively high overall power consumption. Summary of the invention

[0005] The present application provides a truck air conditioning control method, device, equipment and computer-readable storage medium, which can solve the technical problems existing in the prior art that the truck air conditioning system occupies the installation space of the skylight, the cab space, has a complex structure, has high power consumption of the mechanical compressor, and affects the engine power performance.

[0006] In a first aspect, an embodiment of the present application provides a truck air conditioning control method, the truck air conditioning control method comprising:

[0007] Determining a target speed of the electric air conditioning compressor based on an engine state, a truck air conditioning system state, a user set temperature, and a cab temperature;

[0008] controlling the electric air-conditioning compressor to operate according to the target speed, so that the electric air-conditioning compressor compresses the refrigerant into high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser;

[0009] The air conditioner condenser condenses the high-pressure refrigerant into a high-pressure liquid refrigerant, and transmits the high-pressure liquid refrigerant to the air conditioner evaporator;

[0010] After absorbing the heat from the cab, the high-pressure liquid refrigerant in the air-conditioning evaporator is converted into a low-pressure gaseous refrigerant and is transmitted back to the electric air-conditioning compressor to cool the cab when the truck is in driving or parking state.

[0011] In combination with the first aspect, in one implementation, determining the target speed of the electric air-conditioning compressor in combination with the engine state, the air-conditioning system state, the user set temperature and the cabin temperature includes:

[0012] When the engine is running and the air conditioning system is on, the difference between the user-set temperature and the cabin temperature is calculated;

[0013] The numerical interval to which the difference belongs is determined, and the rotation speed corresponding to the numerical interval to which the difference belongs is determined as the target rotation speed of the electric air-conditioning compressor.

[0014] In combination with the first aspect, in one implementation, determining the target speed of the electric air-conditioning compressor in combination with the engine state, the air-conditioning system state, the user set temperature and the cabin temperature includes:

[0015] When the engine is not in operation and the air conditioning system is in operation, determining the numerical range to which the user set temperature belongs;

[0016] Determine a user-set temperature correction value corresponding to the numerical interval to which the user-set temperature belongs;

[0017] Calculating the difference between the user-set temperature correction value and the temperature in the cab;

[0018] The rotation speed corresponding to the numerical interval to which the difference belongs is determined as the target rotation speed of the electric air-conditioning compressor.

[0019] In combination with the first aspect, in one implementation, determining the user-set temperature correction value corresponding to the numerical interval to which the user-set temperature belongs includes:

[0020] When the user-set temperature is in the first value interval, the user-set temperature correction value is the first preset threshold value;

[0021] When the user-set temperature is in the second value interval, the user-set temperature correction value is a second preset threshold value;

[0022] When the user set temperature is in the third value interval, the user set temperature correction value is the user set temperature;

[0023] Among them, the first preset threshold is smaller than the second preset threshold, the upper limit value of the first numerical interval is smaller than the lower limit value of the second numerical interval, and the upper limit value of the second numerical interval is smaller than the lower limit value of the third numerical interval.

[0024] In combination with the first aspect, in one implementation, before determining the numerical interval to which the user set temperature belongs, the method further includes: determining the number of air conditioner condenser fans to be turned on, and turning on the air conditioner condenser fans according to the number of fans to be turned on, wherein determining the number of air conditioner condenser fans to be turned on includes:

[0025] Obtain user-set temperature, cab interior temperature, cab exterior temperature and light intensity;

[0026] Determining the required cooling capacity of the truck air conditioning system based on the user set temperature, the temperature inside the cab, the temperature outside the cab, and the light intensity;

[0027] Based on the required cooling capacity of the truck air conditioning system, determine the number of air conditioning condenser fans to be opened.

[0028] In combination with the first aspect, in one implementation, the required cooling capacity of the truck air conditioning system is determined based on the user set temperature, the interior temperature of the cab, the exterior temperature of the cab and the light intensity, and the corresponding formula is:

[0029] W=K set *T set +K in *T in +K am *T am +K c *C

[0030] Where W is the required cooling capacity of the truck air conditioning system, K set Set the temperature correction factor for the user, T set Set the temperature for the user, K in is the correction coefficient of the cabin temperature, T in is the temperature in the cab, K am is the correction coefficient for the outdoor temperature of the cab, T am is the outdoor temperature of the cab, K c is the light intensity correction coefficient, and C is the light intensity.

[0031] In combination with the first aspect, in one implementation, determining the number of fans to be turned on for the air conditioner condenser based on the required cooling capacity of the truck air conditioning system includes:

[0032] When the required cooling capacity of the truck air conditioning system is less than the preset cooling threshold, an air conditioning condenser fan is turned on;

[0033] When the required cooling capacity of the truck air-conditioning system is greater than a preset cooling threshold, at least two air-conditioning condenser fans are turned on.

[0034] In a second aspect, an embodiment of the present application provides a truck air conditioning control device, the truck air conditioning control device comprising:

[0035] a determination module, for determining a target speed of the electric air conditioning compressor in combination with an engine state, a truck air conditioning system state, a user set temperature, and a cab temperature;

[0036] a compression module, used for controlling the operation of the electric air-conditioning compressor according to the target speed, so that the electric air-conditioning compressor compresses the refrigerant into high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser;

[0037] A condensing module, used for the air-conditioning condenser to condense the high-pressure refrigerant into a high-pressure liquid refrigerant, and to transfer the high-pressure liquid refrigerant to the air-conditioning evaporator;

[0038] The conversion module is used to convert the high-pressure liquid refrigerant in the air-conditioning evaporator into a low-pressure gaseous refrigerant after absorbing the heat in the cab and transmit it back to the electric air-conditioning compressor for cooling the cab when the truck is in driving or parking state.

[0039] In a third aspect, an embodiment of the present application provides a truck air-conditioning control device, which includes a processor, a memory, and a truck air-conditioning control program stored in the memory and executable by the processor, wherein when the truck air-conditioning control program is executed by the processor, the steps of the truck air-conditioning control method as described in any one of the first aspects are implemented.

[0040] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a truck air-conditioning control program is stored. When the truck air-conditioning control program is executed by a processor, the steps of the truck air-conditioning control method as described in any one of the first aspects are implemented.

[0041] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0042] The target speed of the electric air-conditioning compressor is determined by combining the engine state, the truck air-conditioning system state, the user-set temperature and the temperature in the cab; the electric air-conditioning compressor is controlled to operate according to the target speed so that the electric air-conditioning compressor compresses the refrigerant into a high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser; the air-conditioning condenser condenses the high-pressure refrigerant into a high-pressure liquid refrigerant and transmits the high-pressure liquid refrigerant to the air-conditioning evaporator; the high-pressure liquid refrigerant in the air-conditioning evaporator absorbs the heat of the cab, and is converted into a low-pressure gaseous refrigerant and transmitted back to the electric air-conditioning compressor for cooling the cab when the truck is in the driving or parking state. Compared with the driving and parking integrated dual-system air-conditioning, only one electric air-conditioning compressor is used, the system components are reduced, the structure is simple, and the power consumption is relatively low; the cooling effect and cooling efficiency can be improved under the parking cooling condition; and the electric air-conditioning compressor is not affected by the engine speed under the driving cooling condition, which greatly improves the engine's power performance and climbing performance while reducing the air-conditioning power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of a first embodiment of a truck air conditioning control method of the present application;

[0044] Figure 2 A structural diagram of a truck air conditioning system provided by one embodiment of the present application;

[0045] Figure 3 This is a schematic diagram of the circulation of refrigerant in a truck air conditioning system;

[0046] Figure 4 It is the relationship diagram between the speed, power and cooling capacity of the mechanical air-conditioning compressor;

[0047] Figure 5 This is a functional module diagram of an embodiment of a truck air conditioning control device of the present application;

[0048] Figure 6 This is a schematic diagram of the hardware structure of the truck air conditioning control device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0051] In a first aspect, an embodiment of the present application provides a method for controlling air conditioning in a truck.

[0052] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the truck air conditioning control method of the present application. Figure 1 As shown, the truck air conditioning control method includes:

[0053] Step 110, determining a target speed of the electric air conditioning compressor in combination with the engine status, the truck air conditioning system status, the user set temperature and the cab temperature;

[0054] Step 120: controlling the electric air-conditioning compressor to operate according to the target speed, so that the electric air-conditioning compressor compresses the refrigerant into high-pressure refrigerant, and transmits the high-pressure refrigerant to the air-conditioning condenser;

[0055] Step 130: the air conditioner condenser condenses the high-pressure refrigerant into a high-pressure liquid refrigerant, and transmits the high-pressure liquid refrigerant to the air conditioner evaporator;

[0056] Step 140: After absorbing the heat from the cab, the high-pressure liquid refrigerant in the air-conditioning evaporator is converted into a low-pressure gaseous refrigerant and transmitted back to the electric air-conditioning compressor to cool the cab when the truck is in driving or parking state.

[0057] It should be noted that the truck air-conditioning control method provided in this application is applied to a truck air-conditioning system, which includes: an electric air-conditioning compressor, an air-conditioning condenser and an air-conditioning evaporator, and a plurality of air-conditioning condenser fans are also arranged on the outer surface of the air-conditioning condenser. Figure 2 A structural diagram of a truck air conditioning system provided in one embodiment of the present application, such as Figure 2 As shown, serial number 1 is an electric air-conditioning compressor, serial number 2 is a high-pressure pipe, serial number 3 is an air-conditioning condenser, serial number 4 is an air-conditioning condenser fan, serial number 5 is a high-pressure pipe, serial number 6 is an air-conditioning evaporator, and serial number 7 is a low-pressure pipe. The electric air-conditioning compressor is connected to the air-conditioning condenser through a high-pressure pipe, the air-conditioning condenser is connected to the air-conditioning evaporator through a high-pressure pipe, and the air-conditioning evaporator is connected to the electric air-conditioning compressor through a low-pressure pipe; two air-conditioning condenser fans are also arranged on the outer surface of the air-conditioning condenser. The refrigerant circulates in the loop formed by the electric air-conditioning compressor, the air-conditioning condenser and the air-conditioning evaporator to achieve cooling of the cab when the truck is in driving or parking state. Figure 3 Schematic diagram of the refrigerant circulation in a truck air conditioning system.

[0058] In order to overcome the problem in the prior art that the dual-system air conditioner for driving and parking uses an electric air-conditioning compressor to cool the cab when parked, and uses a mechanical air-conditioning compressor to cool the cab when driving, the truck air-conditioning system provided in the present application compresses the refrigerant by an electric air-conditioning compressor when the truck is in a driving cooling condition or a parking cooling condition.

[0059] In the prior art, all electrical components on a truck are powered by a 24V battery. However, when the truck is in the driving cooling condition, the electric air-conditioning compressor is still powered by the 24V battery, which will result in the electric air-conditioning compressor having a low power and being unable to meet the driving cooling demand. Preferably, the rated voltage of the electric air-conditioning compressor is increased from 24V to 48V, and the rated current is ensured not to increase when the power is increased, so as to meet the requirements of the two cooling conditions.

[0060] Accordingly, an additional 48V battery needs to be configured on the truck. The generator and electric air-conditioning compressor are powered by the 48V battery, and the remaining electrical components of the truck are powered by the 24V battery. The 48V battery is charged by the engine driving the 48V generator, and the 24V battery is charged by the 48V to 24V DC / DC. Both the 48V battery and the 24V battery can be charged through the energy recovery system. The present application adopts a 48V air-conditioning system. Unlike all electrical parts of the vehicle that use 48V, only the electric air-conditioning compressor and the generator use the 48V system, and other components still use the 24V system. This can not only ensure the performance of the air conditioning, but also does not require substantial electrical modifications to the current trucks. The cost is relatively low, and the solution is simple and reliable.

[0061] This application can effectively protect the vehicle's power safety, ensure the vehicle's starting and the reliability of the battery:

[0062] First, it can effectively protect the normal start of the vehicle and improve the reliability of the vehicle. The original solution only had one 24V battery. When the 24V battery was low on power, the vehicle engine could not ignite and the vehicle could not start. After adopting the 48V battery, the vehicle is equipped with two batteries. The 48V battery can charge the 24V battery when the 24V battery is low on power, ensuring that the 24V battery has sufficient power to start the engine.

[0063] Secondly, it can more effectively protect the life and reliability of the 24V battery. The 24V battery will not run out of power. After the battery is seriously run out of power several times, the battery will be scrapped. After adding the 48V battery, the phenomenon of 24V battery running out of power can be reduced or avoided, which greatly improves the life and reliability of the 24V battery.

[0064] Among them, the engine status includes the running state and the non-running state, and the truck air-conditioning system status includes the on state and the off state.

[0065] During specific implementation, the engine status and the status of the truck's air-conditioning system are combined to determine whether the truck is in a driving cooling state or a parking cooling state; then, for the driving cooling state and the parking cooling state, the corresponding target speed of the electric air-conditioning compressor is determined based on the user-set temperature and the temperature in the cab; then, the electric air-conditioning compressor is controlled to operate according to the target speed, so that the electric air-conditioning compressor compresses the refrigerant into a high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser; the air-conditioning condenser condenses the high-pressure refrigerant into a high-pressure liquid refrigerant, and transmits the high-pressure liquid refrigerant to the air-conditioning evaporator; the high-pressure liquid refrigerant in the air-conditioning evaporator absorbs the heat from the cab to cool the cab, and then is converted into a low-pressure gaseous refrigerant and transmitted back to the electric air-conditioning compressor.

[0066] In the driving cooling condition, the air conditioner condenser fan can be turned off, because the fan in the engine cooling system and the oncoming wind during driving can be directly used to dissipate the heat of the air conditioner condenser. In the parking cooling condition, the air conditioner condenser fan needs to be turned on to improve the cooling efficiency.

[0067] The effective effects of using a 48V electric air conditioning compressor are as follows:

[0068] For vehicle cooling conditions, the existing technology uses mechanical air conditioning compressors. Figure 4 The relationship between the speed, power and cooling capacity of the mechanical air-conditioning compressor is shown in Figure 2. Figure 4 It can be seen that the higher the speed of the mechanical air-conditioning compressor, the greater the power consumption. When driving, the mechanical air-conditioning compressor is designed according to the engine at a medium speed (about 1300rpm), and the speed of the mechanical air-conditioning compressor is about 1.8 times the engine speed. When the engine runs at high speed, the power consumption of the mechanical air-conditioning compressor will be higher than that at the rated speed. After the electric air-conditioning compressor is adopted, its speed is not affected by the engine speed, and its power consumption is relatively stable, which is equivalent to reducing the load of 6-7kw, and the total power consumption can be reduced by 5%-10%. In addition, it will not add additional load to the engine when going uphill and accelerating sharply. While reducing the power consumption of the air conditioner, it greatly improves the power performance and climbing performance of the engine; and the power generated by the vehicle energy recovery system can be used, which can also save some energy and reduce fuel consumption; at the same time, the speed of the electric air-conditioning compressor can be adjusted to the most suitable lower speed according to the user's set temperature and the temperature in the cab, which can save energy and keep the temperature in the cab stable.

[0069] For parking cooling conditions, the existing technology uses a 24V parking air conditioning system. If the power is further increased, the heat dissipation of its controller cannot be guaranteed due to the increase in current; this problem can be avoided by using a 48V voltage. Under the same current, the cooling power of the system can be doubled, with a greater cooling capacity of the air conditioning system, faster cooling speed and faster cooling effect. Under parking conditions, it can even achieve the same cooling effect as under driving conditions. It takes 40 minutes for the original parking air conditioner to drop the temperature in the cab to 26°C under rated conditions. After adopting the 48V system, the cooling time can be shortened to 20 minutes. In terms of cooling capacity, the original 24V parking air conditioning system can only reduce the average temperature in the cab to 27°C under rated conditions; after adopting the 48V air conditioning system, the average temperature in the cab can be reduced to 24°C, which improves comfort.

[0070] In this embodiment, the target speed of the electric air-conditioning compressor is determined by combining the engine state, the state of the truck air-conditioning system, the user-set temperature and the temperature in the cab; the electric air-conditioning compressor is controlled to operate according to the target speed so that the electric air-conditioning compressor compresses the refrigerant into a high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser; the air-conditioning condenser condenses the high-pressure refrigerant into a high-pressure liquid refrigerant and transmits the high-pressure liquid refrigerant to the air-conditioning evaporator; the high-pressure liquid refrigerant in the air-conditioning evaporator absorbs the heat of the cab, and is converted into a low-pressure gaseous refrigerant and transmitted back to the electric air-conditioning compressor for cooling the cab when the truck is in the driving or parking state. Compared with the driving and parking integrated dual-system air-conditioning, only one electric air-conditioning compressor is used, the system components are reduced, the structure is simple, and the power consumption is relatively low; the cooling effect and cooling efficiency under the parking cooling condition can be improved; and the electric air-conditioning compressor is not affected by the engine speed under the driving cooling condition, while reducing the air-conditioning power consumption, it greatly improves the engine's power performance and climbing performance.

[0071] Furthermore, in one embodiment, the determining the target speed of the electric air-conditioning compressor in combination with the engine state, the air-conditioning system state, the user set temperature and the cabin temperature includes:

[0072] Step 210: When the engine is in operation and the air conditioning system is in the on state, the difference between the user set temperature and the temperature inside the cab is calculated;

[0073] When the engine is running and the air conditioning system is on, that is, the truck is in driving cooling mode, the difference between the user-set temperature and the cab temperature is directly calculated.

[0074] Step 220 : Determine the numerical interval to which the difference belongs, and determine the rotation speed corresponding to the numerical interval to which the difference belongs as the target rotation speed of the electric air-conditioning compressor.

[0075] After determining the numerical interval to which the difference belongs, the rotation speed corresponding to the numerical interval to which the difference belongs is determined by the following table, and the rotation speed corresponding to the numerical interval to which the difference belongs is determined as the target rotation speed of the electric air-conditioning compressor.

[0076]

[0077] Among them, a, b, c, d, e, f, g, and h are pre-set electric air-conditioning compressor speed values, and these values ​​are the most suitable lower speeds set for different numerical intervals to which the difference belongs.

[0078] In this embodiment, it is described how to determine the target speed of the electric air-conditioning compressor according to the user-set temperature and the temperature in the cab under driving cooling conditions. The electric air-conditioning compressor operates at the target speed, which can save vehicle energy consumption.

[0079] Furthermore, in one embodiment, the determining the target speed of the electric air-conditioning compressor in combination with the engine state, the air-conditioning system state, the user set temperature and the cabin temperature includes:

[0080] Step 310: when the engine is not in operation and the air conditioning system is in operation, determining the numerical range to which the user set temperature belongs;

[0081] In specific implementation, in order to further reduce the power consumption of the air conditioning system under parking cooling conditions, the present application pre-sets multiple numerical intervals and establishes a corresponding relationship between the numerical intervals and the user-set temperature correction values, wherein each numerical interval corresponds to a user-set temperature correction value. Exemplarily, three numerical intervals are pre-set, namely, a first numerical interval, a second numerical interval, and a third numerical interval.

[0082] When the engine is not running and the air conditioning system is turned on, that is, the truck is in a parking cooling state, the numerical range to which the user set temperature belongs is first determined.

[0083] Step 320, determining a user set temperature correction value corresponding to the numerical interval to which the user set temperature belongs;

[0084] After determining the numerical interval to which the user-set temperature belongs, the user-set temperature correction value corresponding to the numerical interval to which the user-set temperature belongs is determined from the pre-established correspondence between the numerical interval and the user-set temperature correction value.

[0085] Further, in one embodiment, the determining of the user-set temperature correction value corresponding to the numerical interval to which the user-set temperature belongs includes:

[0086] When the user-set temperature is in the first value interval, the user-set temperature correction value is the first preset threshold value;

[0087] When the user-set temperature is in the second value interval, the user-set temperature correction value is a second preset threshold value;

[0088] When the user set temperature is in the third value interval, the user set temperature correction value is the user set temperature;

[0089] Among them, the first preset threshold is smaller than the second preset threshold, the upper limit value of the first numerical interval is smaller than the lower limit value of the second numerical interval, and the upper limit value of the second numerical interval is smaller than the lower limit value of the third numerical interval.

[0090] For example, the first numerical interval is [10, 16], the second numerical interval is [16.5, 26], and the third numerical interval is [26.5, 32]. When the user-set temperature is in the first numerical interval, the user-set temperature correction value is the first preset threshold value of 24°C; when the user-set temperature is in the second numerical interval, the user-set temperature correction value is the second preset threshold value of 26°C; when the user-set temperature is in the third numerical interval, the user-set temperature correction value is the user-set temperature.

[0091] In this embodiment, the specific correspondence between the numerical range of the user-set temperature and the user-set temperature correction value is given, which can reduce the power consumption of the air-conditioning system under the parking cooling condition while ensuring the cooling effect, and increase the working time of the parking air-conditioning.

[0092] Step 330, calculating the difference between the user set temperature correction value and the temperature inside the cab;

[0093] The user-set temperature correction value is subtracted from the temperature inside the cab to obtain the difference between the two.

[0094] Step 340: Determine the rotation speed corresponding to the numerical interval to which the difference belongs as the target rotation speed of the electric air-conditioning compressor.

[0095] Exemplarily, taking the case where the user set temperature is in the second numerical range [16.5, 26] and the user set temperature correction value is the second preset threshold value 26° C., the target speed of the electric air-conditioning compressor is determined by the following table.

[0096]

[0097] Among them, i, j, k, l, m, n, o, and p are pre-set electric air-conditioning compressor speed values, and these values ​​are the most suitable lower speeds set for different numerical intervals to which the difference belongs.

[0098] In this embodiment, it is described how to determine the target speed of the electric air-conditioning compressor according to the user-set temperature and the temperature in the cab under the parking cooling condition. The electric air-conditioning compressor operates at the target speed, which can save vehicle energy consumption. While ensuring the cooling effect, it can reduce the power consumption of the air-conditioning system under the parking cooling condition and increase the working time of the parking air-conditioning.

[0099] Furthermore, in one embodiment, before determining the numerical range to which the user set temperature belongs, the method further includes: determining the number of air conditioner condenser fans to be turned on, and turning on the air conditioner condenser fans according to the number of fans to be turned on, wherein determining the number of air conditioner condenser fans to be turned on includes:

[0100] Step 410, obtaining the user set temperature, the cabin temperature, the cabin temperature and the light intensity;

[0101] In specific implementation, when the engine is not running and the air-conditioning system is on, that is, the truck is in a parking cooling state, the user-set temperature is obtained through the user's voice command or the information entered by the user on the dashboard, the temperature in the cab is obtained through the temperature sensor in the cab, the temperature outside the cab is obtained through the temperature sensor outside the cab or through the network, and the light intensity is obtained through the light intensity sensor or through the network.

[0102] Step 420: Determine the required cooling capacity of the truck air conditioning system based on the user set temperature, the cabin temperature, the cabin temperature and the light intensity;

[0103] Furthermore, in order to reduce the power consumption of the truck air conditioning system and increase the use time of the parking air conditioner, the present application has formulated a control strategy for the air conditioning condenser fan. Based on the user set temperature, the cab temperature, the cab outdoor temperature and the light intensity, the required cooling capacity of the truck air conditioning system is determined, so that the number of air conditioning condenser fans to be turned on is determined according to the required cooling capacity of the truck air conditioning system, which can greatly reduce the power consumption of the truck air conditioning system compared to turning on all air conditioning condenser fans at once.

[0104] The required cooling capacity of the truck air conditioning system is determined based on the user set temperature, the temperature inside the cab, the temperature outside the cab and the light intensity, and the corresponding formula is:

[0105] W=K set *T set +K in *T in +K am *T am +K c *C

[0106] Where W is the required cooling capacity of the truck air conditioning system, K set Set the temperature correction factor for the user, T set Set the temperature for the user, K in is the correction coefficient of the cabin temperature, T in is the temperature in the cab, K am is the correction coefficient for the outdoor temperature of the cab, T am is the outdoor temperature of the cab, K c is the light intensity correction coefficient, and C is the light intensity.

[0107] Step 430: Determine the number of fans of the air-conditioning condenser to be turned on based on the required cooling capacity of the truck air-conditioning system.

[0108] In specific implementation, the required cooling capacity of the truck air-conditioning system is compared with a preset cooling threshold, and the number of air-conditioning condenser fans to be turned on is determined based on the comparison result.

[0109] In this embodiment, in the parking cooling state, the user set temperature, the temperature inside the cab, the temperature outside the cab and the light intensity are obtained; further based on the user set temperature, the temperature inside the cab, the temperature outside the cab and the light intensity, the required cooling capacity of the truck air-conditioning system is determined; then based on the required cooling capacity of the truck air-conditioning system, the number of air-conditioning condenser fans to be turned on is determined, which can reduce the power consumption of the truck air-conditioning system and increase the service life of the parking air-conditioning.

[0110] Further, in one embodiment, the step of determining the number of fans to be turned on for the air-conditioning condenser based on the required cooling capacity of the truck air-conditioning system includes:

[0111] When the required cooling capacity of the truck air conditioning system is less than the preset cooling threshold, an air conditioning condenser fan is turned on;

[0112] When the required cooling capacity of the truck air-conditioning system is greater than a preset cooling threshold, at least two air-conditioning condenser fans are turned on.

[0113] It can be understood that when the required cooling capacity of the truck air-conditioning system is less than the preset cooling threshold (for example, in summer nights or low temperature weather), it indicates that the user's cooling demand is low and the heat generated by the air-conditioning condenser is not high. At this time, turning on one air-conditioning condenser fan to dissipate heat from the air-conditioning condenser can meet the demand and reduce the power consumption of the air-conditioning system. When the required cooling capacity of the truck air-conditioning system is greater than the preset cooling threshold (for example, in summer daytime or high temperature weather), it indicates that the user's cooling demand is high and the heat generated by the air-conditioning condenser is also high. Turning on at least two air-conditioning condenser fans to dissipate heat from the air-conditioning condenser can meet the demand and improve the heat dissipation efficiency.

[0114] This embodiment provides a method for determining the number of air-conditioning condenser fans to be turned on based on the required cooling capacity of the truck air-conditioning system, which can reduce the power consumption of the truck air-conditioning system and increase the use time of the parking air-conditioning.

[0115] In addition, if the temperature outside the cab is below a certain value, for example, below 10°C, there is no need to cool the cab, and the electric air-conditioning compressor is prohibited from working.

[0116] During driving, when the SOC value of the 48V battery is ≥90%, the generator is turned off and the energy recovery system is used to charge the 48V battery. When the SOC value of the 48V battery is less than <90%, the generator is turned on for charging, and the energy recovery system can be used for charging at the same time.

[0117] During driving, when the vehicle needs high power output, if the 48V battery SOC value is ≥50%, the engine will not be charged temporarily. When the engine power returns to normal, the charging function will be turned on again; if the 48V battery SOC value is <50%, the generator charging function will be turned on regardless of the operating condition of the engine. When the 24V battery SOC value is lower than 70%, the 48V battery will be charged through DC-DC.

[0118] Under the parking cooling condition, when the air conditioning controller obtains the SOC value of the 48V battery through VECU and it is less than 30%, the parking air conditioning is not allowed to work and a battery voltage fault is reported. When the SOC value of the 48V battery is ≥30%, the parking air conditioning can be turned on.

[0119] The above control strategy can effectively protect the vehicle's power safety and ensure the vehicle's starting and battery reliability.

[0120] In a second aspect, an embodiment of the present application also provides a truck air conditioning control device.

[0121] In one embodiment, referring to Figure 5 , Figure 5 This is a functional module diagram of an embodiment of the truck air conditioning control device of the present application. Figure 5 As shown, the truck air conditioning control device 500 includes:

[0122] A determination module 501, for determining a target speed of the electric air conditioning compressor in combination with an engine state, a truck air conditioning system state, a user set temperature, and a cabin temperature;

[0123] A compression module 502, configured to control the operation of the electric air-conditioning compressor according to the target speed, so that the electric air-conditioning compressor compresses the refrigerant into high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser;

[0124] Condensation module 503, used for the air conditioner condenser to condense the high-pressure refrigerant into high-pressure liquid refrigerant, and transfer the high-pressure liquid refrigerant to the air conditioner evaporator;

[0125] The conversion module 504 is used to convert the high-pressure liquid refrigerant in the air-conditioning evaporator into a low-pressure gaseous refrigerant after absorbing the heat in the cab and transmit it back to the electric air-conditioning compressor for cooling the cab when the truck is in driving or parking state.

[0126] Furthermore, in one embodiment, the determining module is specifically used for:

[0127] When the engine is running and the air conditioning system is on, the difference between the user-set temperature and the cabin temperature is calculated;

[0128] The numerical interval to which the difference belongs is determined, and the rotation speed corresponding to the numerical interval to which the difference belongs is determined as the target rotation speed of the electric air-conditioning compressor.

[0129] Furthermore, in one embodiment, the determining module is specifically used for:

[0130] When the engine is not in operation and the air conditioning system is in operation, determining the numerical range to which the user set temperature belongs;

[0131] Determine a user-set temperature correction value corresponding to the numerical interval to which the user-set temperature belongs;

[0132] Calculating the difference between the user-set temperature correction value and the temperature in the cab;

[0133] The rotation speed corresponding to the numerical interval to which the difference belongs is determined as the target rotation speed of the electric air-conditioning compressor.

[0134] Furthermore, in one embodiment, the determining module is specifically used for:

[0135] When the user-set temperature is in the first value interval, the user-set temperature correction value is the first preset threshold value;

[0136] When the user-set temperature is in the second value interval, the user-set temperature correction value is a second preset threshold value;

[0137] When the user set temperature is in the third value interval, the user set temperature correction value is the user set temperature;

[0138] Among them, the first preset threshold is smaller than the second preset threshold, the upper limit value of the first numerical interval is smaller than the lower limit value of the second numerical interval, and the upper limit value of the second numerical interval is smaller than the lower limit value of the third numerical interval.

[0139] Furthermore, in one embodiment, the determining module is further configured to:

[0140] Before determining the numerical interval to which the user set temperature belongs, determining the number of air conditioner condenser fans to be turned on, and turning on the air conditioner condenser fans according to the number of fans to be turned on, wherein determining the number of fans to be turned on includes:

[0141] Obtain user-set temperature, cab interior temperature, cab exterior temperature and light intensity;

[0142] Determining the required cooling capacity of the truck air conditioning system based on the user set temperature, the temperature inside the cab, the temperature outside the cab, and the light intensity;

[0143] Based on the required cooling capacity of the truck air conditioning system, determine the number of air conditioning condenser fans to be opened.

[0144] Further, in one embodiment, the determination module is specifically used to determine the required cooling capacity of the truck air conditioning system according to the following formula, and the corresponding formula is:

[0145] W=K set *T set +K in *T in +K am *T am +K c *C

[0146] Where W is the required cooling capacity of the truck air conditioning system, K set Set the temperature correction factor for the user, T set Set the temperature for the user, K in is the correction coefficient of the cabin temperature, T in is the temperature in the cab, K am is the correction coefficient for the outdoor temperature of the cab, T am is the outdoor temperature of the cab, K c is the light intensity correction coefficient, and C is the light intensity.

[0147] Furthermore, in one embodiment, the determining module is specifically used for:

[0148] When the required cooling capacity of the truck air conditioning system is less than the preset cooling threshold, an air conditioning condenser fan is turned on;

[0149] When the required cooling capacity of the truck air-conditioning system is greater than a preset cooling threshold, at least two air-conditioning condenser fans are turned on.

[0150] Among them, the functional implementation of each module in the above-mentioned truck air-conditioning control device corresponds to the various steps in the above-mentioned truck air-conditioning control method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0151] In a third aspect, an embodiment of the present application provides a truck air conditioning control device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0152] Reference Figure 6 , Figure 6 The hardware structure diagram of the truck air conditioning control device involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the truck air conditioning control device may include a processor, a memory, a communication interface, and a communication bus.

[0153] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0154] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the truck air conditioning control device, and the interface used to realize the interconnection of the truck air conditioning control device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display (Display), a keyboard (Keyboard), etc.

[0155] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0156] The processor may be a general-purpose processor, and the general-purpose processor may call the truck air conditioning control program stored in the memory and execute the truck air conditioning control method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the truck air conditioning control program is called may refer to the various embodiments of the truck air conditioning control method of the present application, and will not be described in detail here.

[0157] Those skilled in the art will understand that Figure 6The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0158] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0159] The computer-readable storage medium of the present application stores a truck air-conditioning control program, wherein when the truck air-conditioning control program is executed by a processor, the steps of the truck air-conditioning control method as described above are implemented.

[0160] Among them, the method implemented when the truck air-conditioning control program is executed can refer to the various embodiments of the truck air-conditioning control method of the present application, and will not be repeated here.

[0161] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0162] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0163] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0164] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or. For example, A / B can mean A or B. The “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0165] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0166] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0167] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A truck air conditioning control method, characterized in that: The truck air conditioning control method comprises: Determining a target speed of the electric air conditioning compressor based on an engine state, a truck air conditioning system state, a user set temperature, and a cab temperature; controlling the electric air-conditioning compressor to operate according to the target speed, so that the electric air-conditioning compressor compresses the refrigerant into high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser; The air conditioner condenser condenses the high-pressure refrigerant into a high-pressure liquid refrigerant, and transmits the high-pressure liquid refrigerant to the air conditioner evaporator; After absorbing the heat from the cab, the high-pressure liquid refrigerant in the air-conditioning evaporator is converted into a low-pressure gaseous refrigerant and is transmitted back to the electric air-conditioning compressor to cool the cab when the truck is in driving or parking state.

2. The truck air conditioning control method according to claim 1, characterized in that: The step of determining the target speed of the electric air-conditioning compressor by combining the engine state, the air-conditioning system state, the user-set temperature, and the cabin temperature includes: When the engine is running and the air conditioning system is on, the difference between the user-set temperature and the cabin temperature is calculated; The numerical interval to which the difference belongs is determined, and the rotation speed corresponding to the numerical interval to which the difference belongs is determined as the target rotation speed of the electric air-conditioning compressor.

3. The truck air conditioning control method according to claim 1, characterized in that: The step of determining the target speed of the electric air-conditioning compressor by combining the engine state, the air-conditioning system state, the user-set temperature, and the cabin temperature includes: When the engine is not in operation and the air conditioning system is in operation, determining the numerical range to which the user set temperature belongs; Determine a user-set temperature correction value corresponding to the numerical interval to which the user-set temperature belongs; Calculating the difference between the user-set temperature correction value and the temperature in the cab; The rotation speed corresponding to the numerical interval to which the difference belongs is determined as the target rotation speed of the electric air-conditioning compressor.

4. The truck air conditioning control method according to claim 3, characterized in that: The determining of the user set temperature correction value corresponding to the numerical interval to which the user set temperature belongs includes: When the user-set temperature is in the first value interval, the user-set temperature correction value is the first preset threshold value; When the user-set temperature is in the second value interval, the user-set temperature correction value is a second preset threshold value; When the user set temperature is in the third value interval, the user set temperature correction value is the user set temperature; Among them, the first preset threshold is smaller than the second preset threshold, the upper limit value of the first numerical interval is smaller than the lower limit value of the second numerical interval, and the upper limit value of the second numerical interval is smaller than the lower limit value of the third numerical interval.

5. The truck air conditioning control method according to claim 3, characterized in that: Before determining the numerical range to which the user set temperature belongs, the method further includes: determining the number of air conditioner condenser fans to be turned on, and turning on the air conditioner condenser fans according to the number of fans to be turned on, wherein determining the number of fans to be turned on includes: Obtain user-set temperature, cab interior temperature, cab exterior temperature and light intensity; Determining the required cooling capacity of the truck air conditioning system based on the user set temperature, the temperature inside the cab, the temperature outside the cab, and the light intensity; Based on the required cooling capacity of the truck air conditioning system, determine the number of air conditioning condenser fans to be opened.

6. The truck air conditioning control method according to claim 5, characterized in that: The required cooling capacity of the truck air conditioning system is determined based on the user set temperature, the temperature inside the cab, the temperature outside the cab and the light intensity, and the corresponding formula is: W=K set *T set +K in *T in +K am *T am +K c *C Where W is the required cooling capacity of the truck air conditioning system, K set Set the temperature correction factor for the user, T set Set the temperature for the user, K in is the correction coefficient of the cabin temperature, T in is the temperature in the cab, K am is the correction coefficient for the outdoor temperature of the cab, T am is the outdoor temperature of the cab, K c is the light intensity correction coefficient, and C is the light intensity.

7. The truck air conditioning control method according to claim 5, characterized in that: The method of determining the number of fans to be turned on for the air conditioner condenser based on the required cooling capacity of the truck air conditioner system includes: When the required cooling capacity of the truck air conditioning system is less than the preset cooling threshold, an air conditioning condenser fan is turned on; When the required cooling capacity of the truck air-conditioning system is greater than a preset cooling threshold, at least two air-conditioning condenser fans are turned on.

8. A truck air conditioning control device, characterized in that: The truck air conditioning control device comprises: a determination module, for determining a target speed of the electric air conditioning compressor in combination with an engine state, a truck air conditioning system state, a user set temperature, and a cab temperature; a compression module, used for controlling the operation of the electric air-conditioning compressor according to the target speed, so that the electric air-conditioning compressor compresses the refrigerant into high-pressure refrigerant and transmits the high-pressure refrigerant to the air-conditioning condenser; A condensing module, used for the air-conditioning condenser to condense the high-pressure refrigerant into a high-pressure liquid refrigerant, and to transfer the high-pressure liquid refrigerant to the air-conditioning evaporator; The conversion module is used to convert the high-pressure liquid refrigerant in the air-conditioning evaporator into a low-pressure gaseous refrigerant after absorbing the heat in the cab and transmit it back to the electric air-conditioning compressor for cooling the cab when the truck is in driving or parking state.

9. A truck air conditioning control device, characterized in that: The truck air conditioning control device includes a processor, a memory, and a truck air conditioning control program stored in the memory and executable by the processor, wherein when the truck air conditioning control program is executed by the processor, the steps of the truck air conditioning control method as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a truck air conditioning control program, wherein when the truck air conditioning control program is executed by a processor, the steps of the truck air conditioning control method according to any one of claims 1 to 7 are implemented.

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