Compressor Control Method, Device and Vehicle

Abstract

The present invention provides a compressor control method, device and vehicle. The compressor control method includes: obtaining the current refrigeration mode and temperature information, where the refrigeration mode includes a passenger compartment refrigeration mode and / or a battery refrigeration mode; determining a target temperature according to the refrigeration mode and temperature information; controlling the compressor to operate at an initial speed; determining the target speed of the compressor according to the operating state of the compressor; and controlling the compressor to adjust to the target speed. The compressor control method of the present invention determines the target speed of the compressor through the target temperature and the current operating state of the compressor, enables the compressor itself to determine the speed increase and decrease strategy based on the target speed, realizes effective control and adjustment of the compressor speed, and thus improves the efficiency of compressor speed adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle air conditioners, and particularly relates to a compressor control method, device and vehicle. Background Art

[0002] An air-conditioning refrigeration system is composed of four basic components: a compressor, a condenser, an evaporator and a throttle valve. The compressor plays the role of sucking, compressing and transporting refrigerant vapor. For the current vehicle air-conditioning refrigeration method, first, the air-conditioning controller combines signals such as the temperature set by the passenger to set the compressor speed; second, when the refrigeration mode is switched, the air-conditioning controller issues a target speed according to the refrigeration mode; third, after receiving the target speed, the compressor adjusts its current speed to the target speed for operation.

[0003] However, the compressor needs to suddenly change from the current speed to the target speed after receiving the target speed issued by the air-conditioning controller. In the case where the air-conditioning controller fails to issue the speed in time, or the target speed issued by the air-conditioning controller differs greatly from the current speed of the compressor, the adjustment efficiency of the compressor speed will be low, which will affect the air-conditioning refrigeration effect and further affect the user experience. Summary of the Invention

[0004] In view of this, the present invention aims to propose a compressor control method, device and vehicle to solve the problem of low adjustment efficiency of the compressor speed.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] A compressor control method includes:

[0007] Obtain the current refrigeration mode and temperature information, where the refrigeration mode includes a passenger compartment refrigeration mode and / or a battery refrigeration mode;

[0008] Determine a target temperature according to the refrigeration mode and the temperature information, and control the compressor to operate at an initial speed;

[0009] Determine the target speed of the compressor according to the operating state of the compressor, and control the compressor to adjust to the target speed, where the operating state of the compressor is determined according to the compressor speed.

[0010] Further, the temperature information includes a set temperature, an in-vehicle temperature and an out-vehicle temperature. The step of determining a target temperature according to the refrigeration mode and the temperature information and controlling the compressor to operate at an initial speed includes:

[0011] If the refrigeration mode is the passenger compartment refrigeration mode, determine the target temperature of the air outlet according to the set temperature and the vehicle interior temperature; determine the target temperature of the evaporator according to the target temperature of the air outlet and the vehicle exterior temperature, and control the compressor to operate at the initial speed;

[0012] If the refrigeration mode is the battery refrigeration mode, determine the target cooling temperature according to the battery cooling request, and control the compressor to operate at the initial speed.

[0013] Further, determining the target speed of the compressor according to the operating state of the compressor includes:

[0014] If the refrigeration mode is the passenger compartment refrigeration mode, determine the target speed of the compressor according to the hysteresis of the target temperature of the evaporator;

[0015] If the refrigeration mode is the battery refrigeration mode, obtain the current system superheat, and determine the target speed of the compressor according to the current system superheat and the preset target superheat.

[0016] Further, the target speed of the passenger compartment refrigeration mode is obtained by the following formula:

[0017] V n =V n-1 +(T x -T y )×K n

[0018] Wherein, V n is the first compressor speed, V n-1 is the current speed of the first compressor, T x is the actual temperature of the evaporator, T y is the preset target temperature of the evaporator, K n is the first reference parameter of the compressor speed.

[0019] Further, the target speed of the battery refrigeration mode is obtained by the following formula:

[0020] V m =V m-1 +(T a -T b )×K m

[0021] Wherein, V m is the second compressor speed, V m-1 is the current speed of the second compressor, T a is the actual superheat, T b is the preset target superheat, K m is the second reference parameter of the compressor speed.

[0022] Further, the operating state of the compressor includes a first state and a second state. Determining the target speed of the compressor according to the operating state of the compressor and controlling the compressor to adjust to the target speed includes:

[0023] When the operating state of the compressor is the first state, increase the speed according to the target speed and the first rising rate; wherein, the first state is the state where the speed of the compressor is zero;

[0024] When the operating state of the compressor is the second state, increase the speed according to the target speed and the second rising rate; wherein, the second state is the state where the speed of the compressor is not zero, and the first rising rate is greater than the second rising rate.

[0025] Further, determining the target speed of the compressor according to the operating state of the compressor and controlling the compressor to adjust to the target speed includes:

[0026] When the operating state of the compressor is the first state, determine the first decreasing rate of the compressor according to the target speed, and decrease the speed according to the first decreasing rate; wherein, the first decreasing rate corresponds to the target speed;

[0027] When the operating state of the compressor is the second state, decrease the speed according to the target speed and the second decreasing rate, wherein the second decreasing rate is less than the first decreasing rate.

[0028] Further, after determining the target speed of the compressor according to the operating state of the compressor and controlling the compressor to adjust to the target speed, it includes:

[0029] If the refrigeration mode is a dual refrigeration mode, control and adjust the speed of the compressor according to the ascending and descending speed values of the passenger compartment refrigeration mode for passenger compartment refrigeration; adjust the opening of the electronic expansion valve EXV for battery refrigeration;

[0030] If in the process of switching the refrigeration mode, control the speed of the compressor to drop to zero, and adjust the solenoid valve SOV switch or the opening of the EXV.

[0031] Another object of the present invention is to propose a compressor control device to solve the problem of untimely adjustment of the compressor speed.

[0032] To achieve the above object, the technical solution of the present invention is realized as follows:

[0033] A compressor control device includes:

[0034] An acquisition module, configured to acquire current refrigeration mode and temperature information, where the refrigeration mode includes a passenger compartment refrigeration mode and / or a battery refrigeration mode;

[0035] A control module, configured to determine a target temperature according to the refrigeration mode and the temperature information, and control the compressor to operate at an initial speed;

[0036] An adjustment module, configured to determine a target speed of the compressor according to the operating state of the compressor, and control the compressor to adjust to the target speed, where the operating state of the compressor is determined according to the compressor speed.

[0037] Compared with the prior art, the compressor control method of the present invention has the following advantages: The compressor control method provided by the present invention obtains the current refrigeration mode and temperature information, where the refrigeration mode includes a passenger compartment refrigeration mode and / or a battery refrigeration mode, determines the target temperature according to the refrigeration mode and the temperature information, controls the compressor to operate at an initial speed, determines the target speed of the compressor according to the operating state of the compressor, and controls the compressor to adjust to the target speed. The present invention determines the target speed of the compressor according to the target temperature and the current operating state of the compressor, enables the compressor itself to determine whether to execute a speed increase strategy or a speed decrease strategy according to the target speed requirement and the current speed, realizes effective control and adjustment of the compressor speed, that is, avoids the problem of low control efficiency of the compressor speed caused by untimely issuance of the speed by the air conditioner controller, thereby improving the control efficiency of the compressor speed and ensuring the air conditioning refrigeration effect.

[0038] To achieve the above object, the present application further provides a vehicle, where the vehicle includes: the above compressor control device to implement the above compressor control method.

[0039] The vehicle has the same advantages as the above method compared with the prior art, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0041] Figure 1 is a flowchart of the steps of a compressor control method provided by an embodiment of the present invention;

[0042] Figure 2 is Figure 1 the process of step 103 in the compressor control method provided by the embodiment of the present invention shown; Figure 1 ;

[0043] Figure 3 is Figure 1Flow of Step 103 in the compressor control method provided by the embodiment of the present invention shown Figure 2 ;

[0044] Figure 4 It is a flowchart of steps of the compressor control method provided by another embodiment of the present invention;

[0045] Figure 5 It is a schematic structural diagram of a compressor control device provided by an embodiment of the present invention. Specific embodiments

[0046] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0047] See Figure 1 , Figure 1 It is a flowchart of steps of a compressor control method provided by an embodiment of the present application. As Figure 1 shown, it includes the following steps:

[0048] Step 101, obtain the current refrigeration mode and temperature information, where the refrigeration mode includes the passenger compartment refrigeration mode and / or the battery refrigeration mode.

[0049] In this embodiment, the air conditioner controller of the vehicle air conditioner control system obtains the current refrigeration mode and temperature information. Among them, the refrigeration mode includes the passenger compartment refrigeration mode and / or the battery refrigeration mode. The air conditioner controller includes an electronic control unit (ECU) and a sensor module. The sensor module is used to obtain temperature information, and the temperature information includes the set temperature, the vehicle interior temperature, and the vehicle exterior temperature. The ECU obtains the set temperature input by the in-vehicle terminal or the user device.

[0050] It should be noted that the compressor control device of the vehicle air conditioner is used to implement the compressor speed control method. The compressor is used to compress the refrigerant to cool the vehicle air conditioner when the compressor speed control conditions are met. The evaporator is used to exchange heat with the air in the passenger compartment when the low-temperature condensed liquid passes through, achieving the refrigeration effect. Among them, a temperature sensor is provided on the evaporator to collect the temperature of the evaporator.

[0051] Specifically, a temperature sensor for obtaining the temperature inside the passenger compartment, i.e., the temperature inside the vehicle, is provided in the passenger compartment. The temperature sensor is connected to and outputs a temperature signal to an air conditioner controller. The air conditioner controller is connected to a refrigeration unit for the occupant compartment and is also connected to a compressor controller to control the compressor for cooling the passenger compartment. A temperature sensor for obtaining the actual temperature of the battery is also provided inside the battery. It is connected to and outputs a temperature signal to the air conditioner controller. The air conditioner controller can cool the battery according to the temperature information and the target cooling temperature. An ambient temperature sensor is provided outside the vehicle, and the ambient temperature sensor is connected to and outputs the outside temperature of the vehicle to the air conditioner controller.

[0052] In this embodiment, the air conditioner controller is communicatively connected to the compressor controller. According to different refrigeration modes and temperature information, the compressor controller adjusts its rotational speed according to the refrigeration mode and the target temperature.

[0053] Step 102: Determine the target temperature according to the refrigeration mode and the temperature information, and control the compressor to operate at an initial rotational speed.

[0054] In this embodiment, the air conditioner controller determines the target refrigeration temperature in the refrigeration mode according to the current refrigeration mode and the acquired temperature information, and correspondingly controls the compressor to operate at the initial rotational speed, so as to control the compressor to start operating after the target temperature is determined.

[0055] Specifically, if the refrigeration mode is the passenger compartment refrigeration mode, determine the target temperature of the air outlet according to the set temperature and the temperature inside the vehicle. Determine the target temperature of the evaporator according to the target temperature of the air outlet and the outside temperature of the vehicle, and control the compressor to operate at the initial rotational speed.

[0056] It should be noted that the occupant compartment is provided with an air inlet and an air outlet. The air conditioner controller determines the target temperature of the air outlet of the air conditioning circuit according to the acquired set temperature and the temperature inside the vehicle. Since the compressor is used to transmit compressed air to the evaporator, and the evaporator is used to exchange heat with the air in the passenger compartment when the low-temperature condensed liquid passes through it to achieve the refrigeration effect, that is, combine the target temperature of the air outlet and the outside temperature of the vehicle to determine the target temperature of the evaporator, and control the compressor to operate at the initial rotational speed according to the target temperature. In this embodiment, in the passenger compartment refrigeration mode, the initial rotational speed of the compressor can be 2000 rpm. The initial rotational speed of the compressor is determined according to the vehicle model, the compressor model and the actual refrigeration requirements. Of course, the above initial rotational speed is only a specific example. In the actual use process, the initial rotational speed can also be set according to the user, and will not be elaborated here one by one.

[0057] This embodiment does not limit the setting of the initial rotational speed of the compressor. In the actual use process, the initial rotational speed of the compressor can be determined in any way.

[0058] Specifically, if the refrigeration mode is the battery refrigeration mode, determine the target cooling temperature according to the battery cooling request, and control the compressor to operate at the initial speed.

[0059] It should be noted that when the air conditioner controller receives the battery cooling request, the battery cooling request may include the target cooling temperature. The air conditioner controller processes the battery cooling request and controls and adjusts the speed of the air conditioner compressor. When necessary, it controls the opening degree of the solenoid valve in the battery refrigeration circuit. The battery refrigeration mode cools the coolant in the battery cooling circuit through the battery refrigeration circuit, and then cools through the coolant circulating in the battery cooling circuit. In this embodiment, in the battery refrigeration mode, the initial speed of the compressor can be 2000 rpm. The initial speed of the compressor is determined according to the vehicle model, compressor model and actual refrigeration requirements. Of course, the above initial speed is only a specific example. In actual use, the initial speed can also be set by the user, which will not be elaborated here one by one.

[0060] Step 103, determine the target speed of the compressor according to the operating state of the compressor, and control the compressor to adjust to the target speed, where the operating state of the compressor is determined according to the compressor speed.

[0061] In this embodiment, after controlling the compressor to operate at the initial speed, the compressor control module determines the target speed of the compressor according to the operating state of the compressor, so as to control and adjust the speed of the compressor. The operating state of the compressor is determined according to the compressor speed. It should be noted that the operating state of the compressor reflects the current speed during the operation of the compressor.

[0062] Specifically, if the refrigeration mode is the passenger compartment refrigeration mode, determine the target speed of the compressor according to the hysteresis of the target temperature of the evaporator.

[0063] In this embodiment, in the passenger compartment refrigeration mode, according to the difference between the actual temperature and the target temperature of the evaporator, the initial speed of the compressor cannot ensure reaching the target temperature, and the speed of the compressor needs to be adjusted. The compressor control module determines the target speed of the compressor according to the change of the target temperature of the evaporator, and dynamically adjusts the speed of the compressor.

[0064] Specifically, the target speed of the passenger compartment refrigeration mode is obtained through the following formula:

[0065] V n =V n-1 +(T x -T y )×K n

[0066] Where, V n is the first compressor speed, V n-1 is the first current compressor speed, T xis the actual temperature of the evaporator, T y is the preset target temperature of the evaporator, K n is the first reference parameter of the compressor speed.

[0067] It should be noted that the first compressor speed is the target speed for adjusting the compressor. The current speed of the first compressor is the currently obtained compressor speed. The first reference parameter of the compressor speed is the speed parameter determined according to the actual vehicle, which is a fixed value after the vehicle model is confirmed. The range of the first reference parameter of the compressor speed in the passenger compartment cooling mode is 800 rpm - 8000 rpm.

[0068] Specifically, if the cooling mode is the battery cooling mode, obtain the current system superheat degree, and determine the target speed of the compressor according to the current system superheat degree and the preset target superheat degree.

[0069] In this embodiment, in the battery cooling mode, the compressor control module is integrated with a sensor. The current system superheat degree is obtained according to the PT sensor at the compressor inlet. The compressor control module confirms the target speed of the compressor according to the difference between the actual superheat degree of the system and the target superheat degree, and adjusts the compressor speed.

[0070] It should be noted that when the operating state of the compressor changes, it will cause the vehicle interior temperature to suddenly rise. To reach the target temperature, the speed of the compressor needs to be gradually increased. In this case, if the opening of the electronic expansion valve EXV remains unchanged, the evaporation pressure will drop, but the cooling capacity will not increase much, which is manifested as an excessively high actual superheat degree in terms of the phenomenon. When the operating conditions change, an increase in the compressor speed will cause an increase in the actual superheat degree, and vice versa.

[0071] Specifically, the target speed in the battery cooling mode is obtained through the following formula:

[0072] V m =V m-1 +(T a -T b )×K m

[0073] Wherein, V m is the second compressor speed, V m-1 is the current speed of the second compressor, T a is the actual superheat degree, T b is the preset target superheat degree, K m is the second reference parameter of the compressor speed.

[0074] It should be noted that the second compressor speed is the target speed for adjusting the compressor. The current speed of the second compressor is the speed of the compressor currently obtained. The second reference parameter of the compressor speed is the speed parameter determined according to the actual vehicle, which is a fixed value after the vehicle model is confirmed. The range of the second reference parameter of the compressor speed in the battery cooling mode is 800 rpm - 3000 rpm.

[0075] The compressor control method provided by the present invention obtains the current cooling mode and temperature information. The cooling mode includes the passenger compartment cooling mode and / or the battery cooling mode. According to the cooling mode and temperature information, the target temperature is determined, and the compressor is controlled to operate at the initial speed. According to the operating state of the compressor, the target speed of the compressor is determined, and the compressor is controlled to adjust to the target speed. The present invention determines the target speed of the compressor according to the target temperature and the current operating state of the compressor, so that the compressor itself determines whether to execute the speed increase strategy or the speed decrease strategy based on the target speed requirement and the current speed, realizing effective control and adjustment of the compressor speed, that is, avoiding the problem of low control efficiency of the compressor speed caused by untimely transmission of the speed by the air conditioner controller, thereby improving the control efficiency of the compressor speed and ensuring the air conditioning cooling effect.

[0076] The second embodiment of the present invention relates to a compressor control method, which is basically the same as the compressor control method provided by the first embodiment, except that, as Figure 2 shown, step 103 includes:

[0077] Step 201, when the operating state of the compressor is the first state, increase the speed according to the target speed and the first rising rate; wherein, the first state is the state where the compressor speed is zero.

[0078] It should be noted that the operating state of the compressor may include the first operating state and the second operating state. The operating state of the compressor is determined according to the current speed of the compressor. The first state is the state where the compressor speed is zero, and the second state is the state where the compressor speed is not zero.

[0079] Specifically, the compressor control module executes the speed increase and decrease adjustment strategy according to the current speed state of the compressor. When it is determined that the current compressor state is the first state, according to the previously determined target speed, the compressor speed is increased at the first rising rate. The first rising rate can be preset and set according to the compressor speed adjustment requirement to achieve the effect of rapid cooling.

[0080] Step 202, when the operating state of the compressor is the second state, increase the speed according to the target speed and the second rising rate; wherein, the second state is the state where the compressor speed is not zero, and the first rising rate is greater than the second rising rate.

[0081] Specifically, when the current operating state of the compressor is the second state, that is, the current rotational speed of the compressor is not zero, the compressor control module increases the rotational speed of the compressor at a second rising rate according to the determined target rotational speed, ensuring that there is no sudden change and abnormal noise during the rotational speed adjustment process of the compressor. Among them, the first rising rate is greater than the second rising rate.

[0082] In the embodiment of the present invention, the speed increase and decrease adjustment strategy is executed according to the actual operating state of the compressor to control the adjustment of the compressor rotational speed. The present invention determines the rising and falling rates of the compressor according to the target temperature and the current operating state of the compressor, enabling the compressor itself to determine whether to execute the speed increase strategy or the speed decrease strategy based on the target rotational speed requirement and the current rotational speed, effectively controlling and adjusting the rotational speed of the compressor, that is, avoiding the problem of low control efficiency of the compressor rotational speed caused by untimely issuance of the rotational speed by the air conditioner controller, thereby improving the control efficiency of the compressor rotational speed and ensuring the refrigeration effect of the air conditioner.

[0083] Specifically, as Figure 3 shown, step 103 further includes:

[0084] Step 203, when the operating state of the compressor is the first state, determine the first falling rate of the compressor according to the target rotational speed, and reduce the rotational speed according to the first falling rate; among them, the first falling rate corresponds to the target rotational speed.

[0085] In this embodiment, the compressor control module executes the speed increase and decrease adjustment strategy according to the current rotational speed state of the compressor. When it is determined that the current state of the compressor is the first state, according to the determined target rotational speed, the rotational speed of the compressor is reduced at the first falling rate. Among them, the first falling rate is set according to the target rotational speed, and the target rotational speed can be divided into ranges, and the first falling rate is determined according to the target rotational speed range.

[0086] Step 204, when the operating state of the compressor is the second state, reduce the rotational speed according to the target rotational speed and the second falling rate; among them, the second falling rate is less than the first falling rate.

[0087] In this embodiment, the compressor control module executes the speed increase and decrease adjustment strategy according to the current rotational speed state of the compressor. When it is determined that the current state of the compressor is the second state, according to the determined target rotational speed, the rotational speed of the compressor is reduced at the second falling rate. Among them, the second falling rate can be preset to ensure that the rotational speed of the compressor drops smoothly without sudden temperature change points.

[0088] To enable those skilled in the art to more clearly understand the method described in steps 201 to 204 above, the following takes the specific process of compressor speed increase and decrease adjustment as an example for illustration:

[0089] The compressor control module executes the speed-up and speed-down strategies according to the compressor speed. The compressor speed-up adjustment strategy is as follows: when the current compressor speed is 0, after the compressor control module receives the target speed, it increases the speed at a rising rate of 600 rpm / s to achieve the effect of rapid cooling; when the current compressor speed is not 0, after the compressor control module receives the target speed, it increases the speed at a rising rate of 200 rpm / s.

[0090] The compressor speed-down adjustment strategy is as follows: when the compressor target speed is 0, the compressor needs to enter the rapid shutdown state and reduce the speed at a falling rate of 400 rpm / s to ensure a smooth descent without temperature mutation points; when the compressor target speed is not 0, if the target speed is in the range of 7500 rpm - 5000 rpm, the falling rate is 2000 rpm / s, if the target speed is in the range of 4999 rpm - 3000 rpm, the speed-down rate is 1000 rpm / s, and if the target speed ≤ 2999 rpm, the compressor directly shuts down and the speed drops to 0.

[0091] In this embodiment, the first rising / falling rate and the second rising / falling rate are determined according to the performance of the compressor itself. Among them, the first rising rate is greater than the second rising rate, and the second falling rate is less than the first falling rate. The specific setting values are not limited here. It can be understood that the above examples are only examples listed for better understanding of the technical solutions of the embodiments of the present invention and do not serve as the sole limitation of the embodiments of the present invention.

[0092] Compared with the prior art, the implementation manner of the present invention can perform speed-up and speed-down adjustment based on the target speed in the refrigeration mode on the basis of achieving the beneficial effects brought by the first implementation manner, so that the technical solution provided by the embodiments of the present invention can be applied to more application scenarios and has a wider application range. Further, the technical solution provided by this implementation manner can control and adjust the compressor speed according to the preset speed-up and speed-down strategies for different speeds, can better meet the adjustment efficiency of the compressor under different refrigeration modes and different application scenarios, and thus improves the air-conditioning refrigeration effect.

[0093] The second implementation manner of the present invention relates to a compressor control method, which is basically the same as the compressor control method provided by the first embodiment of the present invention. The difference is that, as shown in Figure 4 The compressor control method further includes:

[0094] Step 104, if the refrigeration mode is the dual refrigeration mode, control and adjust the compressor speed according to the rising and falling speed values of the passenger compartment refrigeration mode for passenger compartment refrigeration; adjust the opening degree of the electronic expansion valve EXV for battery refrigeration.

[0095] In this embodiment, the dual refrigeration mode is a refrigeration mode in which the passenger compartment refrigeration mode and the battery refrigeration mode operate simultaneously. The electronic expansion valve (EXV) is a throttling element that can control the refrigerant flow rate into the refrigeration device according to a preset program. Since the passenger compartment refrigeration circuit and the battery refrigeration circuit share the same compressor, when the passenger compartment and the battery are refrigerated simultaneously, the air-conditioning controller controls and adjusts the opening degree of the EXV in the battery refrigeration circuit according to the up and down rotation speed values in the passenger compartment refrigeration mode and the received battery cooling request, and controls the rotation speed of the compressor in the occupant compartment refrigeration circuit to ensure the refrigeration purpose of reaching the target temperature.

[0096] In the embodiment of the present invention, under the condition of the dual refrigeration mode, it is necessary to take into account the refrigeration requirements on both the passenger compartment and the battery sides at the same time. The rotation speed of the compressor is adjusted according to the refrigeration requirements of the passenger compartment, and the refrigeration on the battery side is ensured by adjusting the opening degree of the EXV to ensure the air-conditioning refrigeration effect.

[0097] Step 105, if in the process of switching the refrigeration mode, control the rotation speed of the compressor to drop to zero, and adjust the solenoid valve SOV switch or the EXV opening degree.

[0098] In this embodiment, the switching of the refrigeration mode includes the switching between the passenger compartment refrigeration mode, the battery refrigeration mode, and the dual refrigeration mode. During the switching process of the refrigeration mode, in order to avoid the noise caused by the switching valve body during the operation of the compressor, it is necessary to first reduce the rotation speed of the compressor to zero and then adjust the solenoid valve (SOV) or the EXV switch.

[0099] It should be noted that the air-conditioning controller controls the opening and closing of the solenoid valve SOV according to the refrigeration mode to control the flow direction of the refrigerant. Based on the switching of the refrigeration mode, the opening and closing state of the solenoid valve SOV is adjusted in a timely manner. The EXV in the refrigeration circuit is used to control the refrigerant flow rate and the coolant pump in the coolant circuit. The battery refrigeration mode ensures refrigeration by adjusting the EXV opening degree.

[0100] In the embodiments of the present invention, according to the refrigeration mode and the determined lifting speed value, the compressor speed is controlled and adjusted to cool the passenger compartment, and the opening degree of the electronic expansion valve EXV is adjusted to cool the battery. If it is in the process of switching the refrigeration mode, the compressor speed is controlled to drop to zero, and the solenoid valve SOV switch or the EXV opening degree is adjusted. The embodiments of the present invention can take into account the refrigeration requirements of both the passenger compartment and the battery side, adjust the compressor speed according to the refrigeration requirements of the passenger compartment, and cool the battery side by adjusting the EXV opening degree. During the mode switching process, the noise caused by the switch valve body during the operation of the compressor is avoided, and the compressor speed is adjusted to effectively control and adjust the compressor speed, that is, the problem of low control efficiency of the compressor speed caused by untimely transmission of the speed by the air-conditioning controller is avoided, thereby improving the control efficiency of the compressor speed and ensuring the air-conditioning refrigeration effect.

[0101] See Figure 5 , based on the above method for controlling the compressor, the embodiments of the present invention further provide a compressor control device, including:

[0102] An acquisition module 301, configured to acquire the current refrigeration mode and temperature information, where the refrigeration mode includes a passenger compartment refrigeration mode and / or a battery refrigeration mode;

[0103] A control module 302, configured to determine a target temperature according to the refrigeration mode and the temperature information, and control the compressor to operate at an initial speed;

[0104] An adjustment module 303, configured to determine a target speed of the compressor according to the operating state of the compressor, and control the compressor to be adjusted to the target speed, where the operating state of the compressor is determined according to the compressor speed.

[0105] Further, the control module includes:

[0106] A first control sub-module, configured to, if the refrigeration mode is the passenger compartment refrigeration mode, determine an outlet target temperature according to the set temperature and the vehicle interior temperature; determine an evaporator target temperature according to the outlet target temperature and the vehicle exterior temperature, and control the compressor to operate at the initial speed;

[0107] A second control sub-module, configured to, if the refrigeration mode is the battery refrigeration mode, determine a target cooling temperature according to the battery cooling request, and control the compressor to operate at the initial speed.

[0108] Further, the adjustment module includes:

[0109] A first adjustment sub-module, configured to, if the refrigeration mode is the passenger compartment refrigeration mode, determine the target speed of the compressor according to the hysteresis of the evaporator target temperature;

[0110] The second regulation sub-module is used to, if the refrigeration mode is the battery refrigeration mode, obtain the current system superheat degree, and determine the target rotational speed of the compressor according to the current system superheat degree and the preset target superheat degree.

[0111] Furthermore, the first regulation sub-module is further used to obtain the target rotational speed of the passenger compartment refrigeration mode through the following formula:

[0112] V n =V n-1 +(T x -T y )×K n

[0113] Wherein, V n is the rotational speed of the first compressor, V n-1 is the current rotational speed of the first compressor, T x is the actual temperature of the evaporator, T y is the preset target temperature of the evaporator, K n is the first reference parameter of the compressor rotational speed.

[0114] Furthermore, the second regulation sub-module is further used to obtain the target rotational speed of the battery refrigeration mode through the following formula:

[0115] V m =V m-1 +(T a -T b )×K m

[0116] Wherein, V m is the rotational speed of the second compressor, V m-1 is the current rotational speed of the second compressor, T a is the actual superheat degree, T b is the preset target superheat degree, K m is the second reference parameter of the compressor rotational speed.

[0117] Furthermore, the regulation module further includes:

[0118] The third regulation sub-module is used to, when the operating state of the compressor is the first state, increase the rotational speed according to the target rotational speed and the first rising rate; the first state is the state where the rotational speed of the compressor is zero

[0119] The fourth regulation sub-module, when the operating state of the compressor is the second state, increases the rotational speed according to the target rotational speed and the second rising rate; wherein, the second state is the state where the rotational speed of the compressor is not zero, and the first rising rate is greater than the second rising rate.

[0120] Furthermore, the regulation module further includes:

[0121] The fifth adjustment sub-module is used to determine the first deceleration rate of the compressor according to the target speed and reduce the speed according to the first deceleration rate when the operating state of the compressor is the first state; wherein, the first deceleration rate corresponds to the target speed.

[0122] The sixth adjustment sub-module is used to reduce the speed according to the target speed and the second deceleration rate when the operating state of the compressor is the second state, wherein the second deceleration rate is less than the first deceleration rate.

[0123] For the specific implementation method of the compressor control device provided in this embodiment, reference can be made to the content described in the compressor control method provided in this embodiment, which will not be elaborated here.

[0124] The compressor control device provided by the present invention includes an acquisition module for acquiring the current refrigeration mode and temperature information, where the refrigeration mode includes a passenger compartment refrigeration mode and / or a battery refrigeration mode; a control module for determining a target temperature according to the refrigeration mode and temperature information and controlling the compressor to operate at an initial speed; and an adjustment module for determining the target speed of the compressor according to the operating state of the compressor and controlling the compressor to adjust to the target speed. In the embodiment of the present invention, the target speed of the compressor is determined according to the target temperature and the current operating state of the compressor, so that the compressor itself determines whether to execute a speed increase strategy or a speed decrease strategy based on the target speed requirement and the current speed, realizing effective control and adjustment of the compressor speed, that is, avoiding the problem of low control efficiency of the compressor speed caused by untimely issuance of the speed by the air-conditioning controller, thereby improving the control efficiency of the compressor speed and ensuring the air-conditioning refrigeration effect.

[0125] Based on the above compressor control method and device, an embodiment of the present invention further provides a vehicle, which includes: the compressor control device in the above steps for executing the compressor control method described in the above steps.

[0126] It can be understood that the vehicle shown in this application can be an automobile of various models, and the compressor control method proposed in this application can be applied to these various types of automobiles to improve the control efficiency of the compressor speed and ensure the air-conditioning refrigeration effect.

[0127] It should be noted that the embodiments of the present invention are described with reference to the methods and devices according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions of the vehicle management system. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate for implementation in the processFigure 1 one process or multiple processes and / or blocks Figure 1 a device for the functions specified in one block or multiple blocks.

[0128] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple processes and / or the functions specified in one block or multiple blocks.

[0129] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0130] It should also be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such a process, method.

[0131] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. Specific examples have been used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

[0132] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A compressor control method, characterized in that, The method includes: The air-conditioning controller obtains the current refrigeration mode and temperature information, where the refrigeration mode includes the passenger compartment refrigeration mode and / or the battery refrigeration mode; The air-conditioning controller determines a target temperature according to the refrigeration mode and the temperature information, and controls the compressor to operate at an initial speed; The compressor controller determines the target speed of the compressor according to the operating state of the compressor, and controls the compressor to adjust to the target speed, where the operating state of the compressor is determined according to the compressor speed; The temperature information includes the set temperature, the in-vehicle temperature, and the out-vehicle temperature. Determining the target temperature according to the refrigeration mode and the temperature information and controlling the compressor to operate at the initial speed includes: If the refrigeration mode is the passenger compartment refrigeration mode, determine the target temperature of the air outlet according to the set temperature and the in-vehicle temperature; determine the target temperature of the evaporator according to the target temperature of the air outlet and the out-vehicle temperature, and control the compressor to operate at the initial speed; If the refrigeration mode is the battery refrigeration mode, determine the target cooling temperature according to the battery cooling request, and control the compressor to operate at the initial speed; Determining the target speed of the compressor according to the operating state of the compressor includes: If the refrigeration mode is the passenger compartment refrigeration mode, determine the target speed of the compressor according to the hysteresis of the target temperature of the evaporator; If the refrigeration mode is the battery refrigeration mode, obtain the current system superheat, and determine the target speed of the compressor according to the current system superheat and the preset target superheat.

2. The method according to claim 1, characterized in that, The target speed of the passenger compartment refrigeration mode is obtained by the following formula: Among them, is the first compressor speed, is the current speed of the first compressor, is the actual temperature of the evaporator, is the preset target temperature of the evaporator, is the first reference parameter of the compressor speed.

3. The method according to claim 1, wherein The target speed of the battery refrigeration mode is obtained by the following formula: wherein, is the rotational speed of the second compressor, is the current rotational speed of the second compressor, is the actual superheat degree, is the preset target superheat degree, is the second reference parameter of the rotational speed of the compressor.

4. The method according to claim 1, wherein The operating state of the compressor includes a first state and a second state. Determining the target speed of the compressor according to the operating state of the compressor and controlling the compressor to adjust to the target speed includes: When the operating state of the compressor is the first state, increase the speed according to the target speed and the first rising rate; where the first state is the state where the compressor speed is zero; When the operating state of the compressor is the second state, increase the speed according to the target speed and the second rising rate; where the second state is the state where the compressor speed is not zero, and the first rising rate is greater than the second rising rate.

5. The method according to claim 1, characterized in that, Determining the target speed of the compressor according to the operating state of the compressor and controlling the compressor to adjust to the target speed includes: When the operating state of the compressor is the first state, determine the first decreasing rate of the compressor according to the target speed, and decrease the speed according to the first decreasing rate; where the first decreasing rate corresponds to the target speed; When the operating state of the compressor is the second state, decrease the speed according to the target speed and the second decreasing rate, where the second decreasing rate is less than the first decreasing rate.

6. The method according to claim 1, wherein After determining the target speed of the compressor according to the operating state of the compressor and controlling the compressor to adjust to the target speed, it includes: If the refrigeration mode is a dual-refrigeration mode, control and adjust the speed of the compressor according to the target speed of the passenger compartment refrigeration mode for passenger compartment refrigeration; adjust the opening degree of the electronic expansion valve EXV for battery refrigeration; If in the process of switching the refrigeration mode, control the speed of the compressor to drop to zero and adjust the solenoid valve SOV switch or the opening degree of the EXV.

7. A compressor control device, characterized in that, It includes: An acquisition module for the air-conditioning controller to acquire the current refrigeration mode and temperature information, and the refrigeration mode includes a passenger compartment refrigeration mode and / or a battery refrigeration mode; A control module for the air-conditioning controller to determine the target temperature according to the refrigeration mode and the temperature information and control the compressor to operate at an initial speed; An adjustment module for the compressor controller to determine the target speed of the compressor according to the operating state of the compressor, and control the compressor to adjust to the target speed, wherein the operating state of the compressor is determined according to the compressor speed; The control module includes: A first control sub-module for, if the refrigeration mode is the passenger compartment refrigeration mode, determining the target temperature of the air outlet according to the set temperature and the in-vehicle temperature; determining the target temperature of the evaporator according to the target temperature of the air outlet and the out-vehicle temperature, and controlling the compressor to operate at the initial speed; A second control sub-module for, if the refrigeration mode is the battery refrigeration mode, determining the target cooling temperature according to the battery cooling request and controlling the compressor to operate at the initial speed; The adjustment module includes: A first adjustment sub-module for, if the refrigeration mode is the passenger compartment refrigeration mode, determining the target speed of the compressor according to the hysteresis of the target temperature of the evaporator; A second adjustment sub-module for, if the refrigeration mode is the battery refrigeration mode, acquiring the current system superheat degree and determining the target speed of the compressor according to the current system superheat degree and the preset target superheat degree.

8. A vehicle, characterized in that, It includes: The compressor control method according to any one of claims 1 to 6.

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