Control method and device for double-electromagnetic-control-valve refrigerating system of new energy automobile

Abstract

The invention discloses a control method, device and equipment for a double-electromagnetic-control-valve refrigerating system of a new energy automobile and a storage medium, and relates to the technical field of automobile heat management. And stable distribution of the refrigerating capacity in the mode switching process is achieved. When a single-passenger-compartment refrigeration mode is switched to a double-refrigeration mode, the rotating speed of the electric compressor is increased to increase the total refrigerating capacity of the system, the electromagnetic control valve is matched for intermittent on-off distribution of the refrigerating capacity, the battery water pump is slowly accelerated, and a large amount of refrigerant is prevented from being shunted. When the dual-refrigeration mode is switched to the single passenger compartment refrigeration mode, the rotating speed of a battery water pump is reduced, refrigeration consumption is reduced, the refrigerating capacity is recovered through reverse intermittent on-off of an electromagnetic control valve, the speed of an electric compressor is synchronously and slowly reduced, and concentrated backflow of refrigerants is avoided. The refrigerant flow and the system pressure can be kept stable, and the refrigerating comfort of a passenger compartment is guaranteed.

Description

Technical Field

[0001] This application relates to the field of automotive thermal management technology, and in particular to a control method, device, equipment and storage medium for a dual electromagnetic control valve refrigeration system in a new energy vehicle. Background Technology

[0002] Currently, automotive refrigeration systems mainly transfer heat through refrigerant circulation (compression, condensation, expansion, and evaporation) to achieve cooling. Some new energy vehicles have two refrigeration circuits: a passenger compartment refrigeration circuit and a battery refrigeration circuit.

[0003] In some new energy commercial vehicles, in order to reduce costs, both the passenger compartment cooling circuit and the battery cooling circuit use electromagnetic control valve (SOV) refrigeration systems. However, SOV can only control the on / off of refrigerant and cannot regulate the refrigerant flow. If the control method is not appropriate, when switching from single-cooling mode to dual-cooling mode in the passenger compartment, the battery cooling circuit will divert a large amount of refrigerant flow, and the temperature at the passenger compartment air outlet will rise significantly. Alternatively, when switching from dual-cooling mode to single-cooling mode in the passenger compartment, all the refrigerant in the battery cooling circuit will flow to the passenger compartment cooling circuit, and the temperature at the passenger compartment air outlet will drop significantly, which will greatly affect the cooling comfort of the passenger compartment. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a control method, apparatus, equipment, and storage medium for a dual electromagnetic control valve refrigeration system in new energy vehicles, including the following: In a first aspect, this application provides a control method for a dual electromagnetic control valve refrigeration system in a new energy vehicle, applicable to new energy vehicles employing a dual electromagnetic control valve refrigeration system. The dual electromagnetic control valve refrigeration system includes an electric compressor and a battery water pump, and also includes an independent but collaboratively operable passenger compartment refrigeration circuit and a battery refrigeration circuit. The passenger compartment refrigeration circuit is equipped with a passenger compartment refrigeration circuit electromagnetic control valve, and the battery refrigeration circuit is equipped with a battery refrigeration circuit electromagnetic control valve. The method includes: When switching from single-passenger cabin cooling mode to dual-cooling mode, the speed of electric compressor is gradually increased. When the speed of electric compressor reaches the first preset value, the electromagnetic control valve of battery cooling circuit is intermittently switched on and off. At the same time, the battery water pump is turned on and the speed of battery water pump is gradually increased to the target battery water pump speed of dual-cooling mode. When switching from dual-cooling mode to single-occupant cabin cooling mode, the speed of the battery water pump is gradually reduced. When the speed of the battery water pump reaches a second preset value, the electromagnetic control valve of the battery cooling circuit is subjected to reverse intermittent on / off control, and the speed of the electric compressor is gradually reduced to the speed corresponding to the single-occupant cabin cooling mode.

[0005] Optionally, when switching from single-occupant cabin cooling mode to dual-cooling mode, the gradual increase in the speed of the electric compressor includes: The electric compressor speed gradually increases to the target electric compressor speed of the dual-cooling mode within a first preset time period. When the electric compressor speed reaches the first preset value, the electromagnetic control valve of the battery cooling circuit is activated to perform intermittent on-off control, wherein the first preset value is less than the target electric compressor speed of the dual-cooling mode.

[0006] Optionally, the intermittent on / off control of the electromagnetic control valve in the battery cooling circuit includes: The solenoid control valve of the battery cooling circuit is opened for a second preset time and then closed for a third preset time, and this on-off process is repeated a preset number of times.

[0007] Optionally, the step of activating the battery water pump and gradually increasing its speed to the target battery water pump speed in the dual cooling mode includes: The battery water pump is started at the same time as the electromagnetic control valve of the battery cooling circuit is opened for the first time. The battery water pump slowly increases to the target battery water pump speed of the dual cooling mode for a fourth preset time. The fourth preset time is longer than the first preset time when the electric compressor increases its speed when switching from the single occupant cabin cooling mode to the dual cooling mode.

[0008] Optionally, when switching from dual-cooling mode to single-occupant cabin cooling mode, gradually decreasing the speed of the battery water pump includes: The battery water pump gradually reduces its speed from the target battery water pump speed in the dual-cooling mode to the shutdown speed over a fourth preset duration. When the battery water pump speed drops to the second preset value, the reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit is initiated. The fourth preset duration is consistent with the duration of the battery water pump speed-up when switching from the single-occupant cabin cooling mode to the dual-cooling mode.

[0009] Optionally, the reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit includes: The solenoid valve of the battery cooling circuit is closed for a third preset duration and then opened for a second preset duration. This on / off process is repeated a preset number of times. The second preset duration is the same as the opening duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode. The third preset duration is the same as the closing duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode.

[0010] Optionally, when switching from dual-cooling mode to single-occupant cabin cooling mode, gradually decreasing the speed of the electric compressor includes: At the same time as the electromagnetic control valve of the battery cooling circuit is closed for the first time, the speed of the electric compressor is adjusted to decrease. The electric compressor gradually decreases to the speed corresponding to the single-occupant cabin cooling mode within a fifth preset time period, wherein the fifth preset time period is longer than the fourth preset time period for the battery water pump to decelerate when switching from dual cooling mode to single-occupant cabin cooling mode.

[0011] Secondly, this application provides a control device for a dual electromagnetic control valve refrigeration system in a new energy vehicle, applicable to new energy vehicles employing a dual electromagnetic control valve refrigeration system. The dual electromagnetic control valve refrigeration system includes an electric compressor and a battery water pump, and also includes an independent but collaboratively operable passenger compartment refrigeration circuit and a battery refrigeration circuit. The passenger compartment refrigeration circuit is equipped with a passenger compartment refrigeration circuit electromagnetic control valve, and the battery refrigeration circuit is equipped with a battery refrigeration circuit electromagnetic control valve. The device includes: The first switching unit is used to gradually increase the speed of the electric compressor when switching from the single-occupant cabin cooling mode to the dual-cooling mode. When the speed of the electric compressor reaches the first preset value, the unit intermittently controls the on / off of the electromagnetic control valve of the battery cooling circuit, and at the same time turns on the battery water pump and gradually increases the speed of the battery water pump to the target battery water pump speed of the dual-cooling mode. The second switching unit is used to gradually reduce the speed of the battery water pump when switching from dual-cooling mode to single-occupant cabin cooling mode. When the speed of the battery water pump reaches a second preset value, it performs reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit, and at the same time, it gradually reduces the speed of the electric compressor to the speed corresponding to the single-occupant cabin cooling mode.

[0012] Optionally, when the first switching unit switches from single-occupant cabin cooling mode to dual-cooling mode, the gradual increase in the speed of the electric compressor includes: The electric compressor speed gradually increases to the target electric compressor speed of the dual-cooling mode within a first preset time period. When the electric compressor speed reaches the first preset value, the electromagnetic control valve of the battery cooling circuit is activated to perform intermittent on-off control, wherein the first preset value is less than the target electric compressor speed of the dual-cooling mode.

[0013] Optionally, the first switching unit performs intermittent on / off control of the solenoid control valve of the battery cooling circuit, including: The solenoid control valve of the battery cooling circuit is opened for a second preset time and then closed for a third preset time, and this on-off process is repeated a preset number of times.

[0014] Optionally, the first switching unit activates the battery water pump and gradually increases the battery water pump speed to the target battery water pump speed in the dual cooling mode, including: The battery water pump is started at the same time as the electromagnetic control valve of the battery cooling circuit is opened for the first time. The battery water pump slowly increases to the target battery water pump speed of the dual cooling mode for a fourth preset time. The fourth preset time is longer than the first preset time when the electric compressor increases its speed when switching from the single occupant cabin cooling mode to the dual cooling mode.

[0015] Optionally, when the second switching unit switches from dual-cooling mode to single-occupant cabin cooling mode, gradually decreasing the speed of the battery water pump includes: The battery water pump gradually reduces its speed from the target battery water pump speed in the dual-cooling mode to the shutdown speed over a fourth preset duration. When the battery water pump speed drops to the second preset value, the reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit is initiated. The fourth preset duration is consistent with the duration of the battery water pump speed-up when switching from the single-occupant cabin cooling mode to the dual-cooling mode.

[0016] Optionally, the second switching unit performs reverse intermittent on / off control of the solenoid control valve of the battery cooling circuit, including: The solenoid valve of the battery cooling circuit is closed for a third preset duration and then opened for a second preset duration. This on / off process is repeated a preset number of times. The second preset duration is the same as the opening duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode. The third preset duration is the same as the closing duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode.

[0017] Optionally, when the second switching unit switches from dual-cooling mode to single-occupant cabin cooling mode, gradually decreasing the speed of the electric compressor includes: At the same time as the electromagnetic control valve of the battery cooling circuit is closed for the first time, the speed of the electric compressor is adjusted to decrease. The electric compressor gradually decreases to the speed corresponding to the single-occupant cabin cooling mode within a fifth preset time period, wherein the fifth preset time period is longer than the fourth preset time period for the battery water pump to decelerate when switching from dual cooling mode to single-occupant cabin cooling mode.

[0018] Thirdly, this application provides an apparatus comprising a memory and a processor, the memory for storing instructions or code, and the processor for executing the instructions or code to cause the apparatus to perform the control method for the dual electromagnetic control valve refrigeration system of new energy vehicles described in any of the implementations of the first aspect.

[0019] Fourthly, this application provides a computer-readable storage medium storing code, wherein when the code is executed, a device executing the code implements the control method for the dual electromagnetic control valve refrigeration system of a new energy vehicle described in any of the implementations of the first aspect.

[0020] This application provides a control method for a dual-electromagnetic control valve refrigeration system in a new energy vehicle. By coordinating the working sequence of the electric compressor, the electromagnetic control valve of the battery refrigeration circuit, and the battery water pump, and through step-wise speed regulation, during the switch from single-passenger compartment refrigeration mode to dual-refrigeration mode, the electric compressor speed is gradually increased to preemptively increase the total system refrigeration capacity. Then, the refrigeration capacity is smoothly distributed to the battery refrigeration circuit through intermittent on / off control of the electromagnetic control valve of the battery refrigeration circuit. Simultaneously, the battery water pump slowly increases its speed to gradually increase the refrigeration capacity consumption of the battery refrigeration circuit, avoiding the instantaneous loss of a large amount of refrigerant after the battery refrigeration circuit is activated. During the switch from dual-refrigeration mode to single-passenger compartment refrigeration mode, the battery water pump speed is gradually decreased to reduce the battery... The cooling capacity consumed by the refrigeration circuit is then smoothly recovered by intermittently switching the solenoid control valve of the battery refrigeration circuit. Simultaneously, the electric compressor gradually reduces its speed, decreasing the total system cooling capacity. This prevents all refrigerant from flowing back to the passenger compartment refrigeration circuit after the battery refrigeration circuit is shut down. This ensures that the refrigerant flow rate within the refrigeration system remains stable during mode switching, preventing sudden increases or decreases in system pressure. The refrigerant supply to the passenger compartment refrigeration circuit remains stable, and the passenger compartment air outlet temperature does not fluctuate significantly before and after mode switching, thus ensuring comfortable cooling of the passenger compartment under various vehicle operating conditions. This approach adapts to the structural characteristics of dual-electromagnetic control valve refrigeration systems, resolving temperature fluctuations caused by refrigerant on / off control characteristics during refrigeration mode switching. It also avoids damage to core components caused by sudden pressure changes in the refrigeration system, improving the operational stability of the refrigeration system and the overall thermal management performance of the vehicle while controlling manufacturing costs. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings used in the description of the embodiment or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a dual electromagnetic control valve refrigeration system provided in this application embodiment; Figure 2 A flowchart of a control method for a dual electromagnetic control valve refrigeration system in a new energy vehicle, provided as an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a control device for a dual electromagnetic control valve refrigeration system of a new energy vehicle, provided in an embodiment of this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] The dual-electromagnetic-controlled valve (SOV) refrigeration system uses SOV refrigeration in both the passenger compartment and battery refrigeration circuits. In existing technology, to reduce costs, both the passenger compartment and battery refrigeration circuits use SOV refrigeration systems with electromagnetic control valves. The SOV is a component used to control the on / off of refrigerant, and can only switch the refrigerant passage. It cannot regulate the refrigerant flow like an electronic expansion valve. If the control method is not appropriate, when switching from single-cooling mode to dual-cooling mode, the battery refrigeration circuit will divert a large amount of refrigerant flow, and the temperature at the passenger compartment air outlet will rise significantly. Alternatively, when switching from dual-cooling mode to single-cooling mode, all the refrigerant in the battery refrigeration circuit will flow to the passenger compartment refrigeration circuit, and the temperature at the passenger compartment air outlet will drop significantly, affecting the cooling comfort of the passenger compartment. To address this technical problem, this application provides a control method for a dual electromagnetic control valve (SOV) refrigeration system in new energy vehicles. This method aims to control the dual electromagnetic control valve refrigeration system of new energy vehicles and ensure the cooling comfort of the passenger compartment under various operating conditions by rationally controlling the working sequence and coordination of the electric compressor, the battery refrigeration circuit SOV, and the battery water pump.

[0025] Figure 1 A schematic diagram of a dual SOV refrigeration system provided in this application embodiment is shown below. Figure 1 The dual SOV refrigeration system provided in the embodiments of this application will be described.

[0026] like Figure 1As shown, the system comprises an electric compressor 1, a condenser 2, an electric fan 3, an evaporator 4, a solenoid control valve 5 for the crew compartment refrigeration circuit, a battery heat exchanger 6, a solenoid control valve 7 for the battery refrigeration circuit, a battery water pump 8, and a power battery 9. The system is equipped with independent yet collaborative crew compartment and battery refrigeration circuits. The electric compressor 1 is the common core power component for both refrigeration circuits, providing the power to compress the refrigerant and serving as the power source for refrigerant circulation. The battery water pump 8 is the dedicated power component for the battery refrigeration circuit, providing the power for the circulation of coolant in the battery circuit and working with the battery heat exchanger 6 to dissipate heat from the power battery 9. The refrigeration circuit of the passenger compartment is equipped with a solenoid control valve 5, and the refrigeration circuit of the battery is equipped with a solenoid control valve 7. Both solenoid control valves are SOV components that control the on / off state of the refrigerant, and independently control the on / off state of the refrigerant in their respective refrigeration circuits, thereby realizing the on / off control of the refrigeration circuit of the passenger compartment and the refrigeration circuit of the battery. The condenser 2 and the electric fan 3 work together to realize the condensation and heat dissipation of the refrigerant, and the evaporator 4 is the refrigeration heat exchange component of the refrigeration circuit of the passenger compartment, which completes the heat exchange on the passenger compartment side.

[0027] Based on the above-mentioned dual SOV refrigeration system structure, this application proposes a corresponding control method for the refrigeration mode switching control of the system to solve the problem of large temperature fluctuations at the passenger compartment air outlet during mode switching, and to ensure the cooling comfort of the passenger compartment. Figure 2 A flowchart of a control method for a dual electromagnetic control valve refrigeration system in a new energy vehicle, provided in this application embodiment, is described below in conjunction with... Figure 2 This application provides a detailed description of the control method for a dual electromagnetic control valve refrigeration system in a new energy vehicle, which may include: S201. When switching from single-occupant cabin cooling mode to dual-cooling mode, the speed of electric compressor is gradually increased. When the speed of electric compressor reaches the first preset value, the electromagnetic control valve of battery cooling circuit is intermittently switched on and off. At the same time, the battery water pump is turned on and the speed of battery water pump is gradually increased to the target battery water pump speed of dual-cooling mode. The single-passenger-cabin cooling mode is a cooling mode in which only the passenger-cabin cooling circuit is in operation and the battery cooling circuit is off. The dual-cooling mode is a cooling mode in which both the passenger-cabin cooling circuit and the battery cooling circuit are in operation simultaneously. The first preset value is S1, which is the critical speed at which the intermittent on / off control of the electromagnetic control valve of the battery cooling circuit is triggered during the process of the electric compressor increasing from the stable speed of the single-passenger-cabin cooling mode to the target speed of the dual-cooling mode. S1 is less than the target speed of the electric compressor in the dual-cooling mode. The target battery water pump speed is the rated operating speed of the battery water pump in the dual-cooling mode to meet the battery cooling requirements. It is also the speed value at which the battery water pump needs to operate stably in the dual-cooling mode. The speed is gradually increased to a uniform speed increase according to the set rate to avoid the system imbalance caused by a sudden increase in speed. The intermittent on / off control is a control method that alternately executes the opening and closing actions according to the preset time to achieve a stable distribution of cooling capacity.

[0028] In one implementation of this application, when switching from a single-occupant cabin cooling mode to a dual-cooling mode, the gradual increase in the speed of the electric compressor includes: The electric compressor speed gradually increases to the target electric compressor speed for the dual-cooling mode within a first preset time period. When the electric compressor speed reaches the first preset value, intermittent on / off control of the electromagnetic control valve of the battery cooling circuit is initiated. The first preset value is less than the target electric compressor speed for the dual-cooling mode. The first preset time period is T1, which is the total time for the electric compressor to slowly increase from the speed in the single-passenger compartment cooling mode to the speed in the dual-cooling mode. For example, T1 can be set to 10 seconds, and the electric compressor will uniformly increase from the stable speed in the single-passenger compartment cooling mode to the target electric compressor speed in the dual-cooling mode within 10 seconds. Slowly increasing the electric compressor speed first can increase the overall cooling capacity of the system in advance, avoiding a significant increase in the passenger compartment air outlet temperature caused by the subsequent opening of the battery cooling circuit diverting a large amount of refrigerant. Simultaneously, triggering the subsequent on / off control when the compressor speed reaches S1, rather than waiting until the speed reaches the target value for the dual-cooling mode, avoids the problem of excessive system cooling capacity causing a significant drop in the passenger compartment air outlet temperature when the compressor speed continues to increase, thus ensuring the stability of the passenger compartment temperature.

[0029] In one implementation of this application, the intermittent on / off control of the electromagnetic control valve of the battery cooling circuit includes: The solenoid valve of the battery cooling circuit is controlled to open for a second preset time and then close for a third preset time. This on / off process is repeated a preset number of times, where the second preset time is T2, the third preset time is T3, and the preset number of times is N. For example, T2 is set to 5 seconds, T3 is set to 3 seconds, and N is set to 3 times, meaning the solenoid valve of the battery cooling circuit is controlled to open for 5 seconds and then close for 3 seconds, and this on / off action is repeated 3 times. This intermittent on / off control method can smoothly transfer a portion of the cooling capacity to the battery cooling circuit, avoiding the problem of large pressure fluctuations in the cooling system caused by directly and continuously opening the solenoid valve of the battery cooling circuit. Simultaneously, the cyclic on / off action gradually adapts to the cooling capacity distribution requirements of the dual cooling modes, preventing system imbalance caused by instantaneous transfer of cooling capacity.

[0030] In one implementation of this application, the step of turning on the battery water pump and gradually increasing its speed to the target battery water pump speed in dual cooling mode includes: The battery water pump is activated simultaneously with the first opening of the solenoid control valve of the battery cooling circuit. The battery water pump slowly increases to the target speed of the dual-cooling mode over a fourth preset time period. This fourth preset time period is longer than the first preset time period for the electric compressor to increase its speed when switching from the single-passenger cabin cooling mode to the dual-cooling mode. The fourth preset time period is T4, and T4 > T1. For example, if T1 is 10 seconds, T4 can be set to 15 seconds. The battery water pump will uniformly increase from its initial 0 speed to the target speed of the dual-cooling mode within 15 seconds. Activating the battery water pump simultaneously with the first opening of the solenoid control valve of the battery cooling circuit enables synchronized refrigerant on / off and refrigerant delivery, ensuring coordination between cooling capacity transfer and refrigerant circulation. The slow increase in speed over T4, ensuring that T4 > T1, gradually increases the cooling capacity consumption rate of the battery cooling circuit, preventing the battery cooling circuit from carrying away too much cooling capacity and causing a significant rise in the temperature of the passenger cabin air outlet. This keeps the temperature change of the passenger cabin air outlet within a range that is not easily perceived by the human body.

[0031] S202. When switching from dual-cooling mode to single-occupant cabin cooling mode, the speed of the battery water pump is gradually reduced. When the speed of the battery water pump reaches the second preset value, the electromagnetic control valve of the battery cooling circuit is subjected to reverse intermittent on-off control. At the same time, the speed of the electric compressor is gradually reduced to the speed corresponding to the single-occupant cabin cooling mode.

[0032] The second preset value, S2, is the critical speed at which the reverse intermittent on / off control of the solenoid valve of the battery cooling circuit is triggered during the process of the battery water pump decreasing from the target battery water pump speed in the dual-cooling mode to the shutdown speed. The reverse intermittent on / off control is an on / off control method with the timing opposite to the intermittent on / off control when switching from the single-passenger cabin cooling mode to the dual-cooling mode. It is used to achieve a smooth recovery of cooling capacity. The speed corresponding to the single-passenger cabin cooling mode is the stable operating speed of the electric compressor when only the passenger cabin cooling circuit is working. It gradually decreases to a uniform speed reduction at a set rate to avoid sudden drops in speed that could cause a sudden change in system pressure.

[0033] In one implementation of this application, when switching from dual-cooling mode to single-occupant cabin cooling mode, the gradual reduction of the battery water pump speed includes: the battery water pump slowly reducing from the target battery water pump speed in dual-cooling mode to the shutdown speed over a fourth preset duration; and when the battery water pump speed drops to the second preset value, initiating reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit; the fourth preset duration is consistent with the duration of battery water pump speed-up when switching from single-occupant cabin cooling mode to dual-cooling mode, the fourth preset duration is T4, and the shutdown speed is the 0 speed when the battery water pump stops working. For example, when T4 is 15 seconds, the battery water pump will uniformly reduce from the target battery water pump speed in dual-cooling mode to 0 speed within 15 seconds. By gradually reducing the speed of the battery water pump using T4, the cooling capacity carried away by the battery cooling circuit can be gradually reduced, providing a transition for the subsequent shutdown of the battery cooling circuit. This avoids the problem of large pressure fluctuations in the cooling system caused by directly shutting down the relevant components of the battery cooling circuit. At the same time, using T4 for deceleration with the same acceleration time ensures the stability of the cooling capacity change of the battery cooling circuit. Combined with the critical triggering effect of S2, precise connection between speed regulation and on / off control can be achieved.

[0034] In one implementation of this application, the reverse intermittent on / off control of the battery cooling circuit solenoid valve includes: controlling the battery cooling circuit solenoid valve to close for a third preset duration and then open for a second preset duration, and cyclically executing this on / off process a preset number of times; the second preset duration is consistent with the opening duration when the battery cooling circuit solenoid valve is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode, and the third preset duration is consistent with the closing duration when the battery cooling circuit solenoid valve is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode, wherein the second preset duration is T2, the third preset duration is T3, and the preset number of times is N. For example, T3 is 3 seconds, T2 is 5 seconds, and N is 3 times, that is, controlling the battery cooling circuit solenoid valve to close for 3 seconds and then open for 5 seconds, and this on / off action is cyclically executed 3 times. This reverse intermittent on / off control method avoids the problem of large pressure fluctuations in the refrigeration system caused by directly shutting down the electromagnetic control valve of the battery refrigeration circuit. At the same time, it prevents the occupant compartment refrigeration circuit from taking away too much cooling capacity instantly, which would cause a significant drop in the temperature of the occupant compartment air outlet. This allows for the smooth recovery of cooling capacity from the battery refrigeration circuit, ensuring the operational stability of the refrigeration system.

[0035] In one implementation of this application, when switching from dual-cooling mode to single-occupant cabin cooling mode, the gradual reduction of the electric compressor speed includes: simultaneously closing the electromagnetic control valve of the battery cooling circuit for the first time and reducing the electric compressor speed. The electric compressor gradually reduces to the speed corresponding to the single-occupant cabin cooling mode within a fifth preset time period. The fifth preset time period is longer than the fourth preset time period for the battery water pump to decelerate when switching from dual-cooling mode to single-occupant cabin cooling mode. The fifth preset time period is T5, and T5 > T4. For example, when T4 is 15 seconds, T5 can be set to 20 seconds. The electric compressor will uniformly reduce from the target electric compressor speed of dual-cooling mode to the speed corresponding to single-occupant cabin cooling mode within 20 seconds. The electric compressor is started to slow down at the same time as the electromagnetic control valve of the battery cooling circuit is closed for the first time. This can achieve the synchronization of cooling capacity recovery and system total cooling capacity adjustment. By slowly slowing down at T5 and ensuring that T5 > T4, the overall cooling capacity of the system can be gradually reduced. This avoids the problem that all the excess cooling capacity in the system flows to the passenger compartment cooling circuit, causing a significant drop in the temperature of the passenger compartment air outlet. This keeps the temperature change of the passenger compartment air outlet before and after the cooling mode switch within a range that is not easily perceived by the human body, ensuring the cooling comfort of the passenger compartment.

[0036] The above are some specific implementations of a control method for a dual electromagnetic control valve refrigeration system in a new energy vehicle provided in the embodiments of this application. Based on this, this application also provides a corresponding device. The device provided in the embodiments of this application will be described below from the perspective of functional modularity.

[0037] Figure 3 This is a schematic diagram of a control device for a dual electromagnetic control valve refrigeration system in a new energy vehicle, provided in an embodiment of this application. The device is applied to new energy vehicles employing a dual electromagnetic control valve refrigeration system. The dual electromagnetic control valve refrigeration system includes an electric compressor and a battery water pump, as well as independent but collaboratively operable passenger compartment refrigeration circuit and battery refrigeration circuit. The passenger compartment refrigeration circuit is equipped with a passenger compartment refrigeration circuit electromagnetic control valve, and the battery refrigeration circuit is equipped with a battery refrigeration circuit electromagnetic control valve. Figure 3 As shown in the embodiment of this application, the new energy vehicle dual electromagnetic control valve refrigeration system control device 300 includes: The first switching unit 310 is used to gradually increase the speed of the electric compressor when switching from the single-occupant cabin cooling mode to the dual-cooling mode. When the speed of the electric compressor reaches the first preset value, it performs intermittent on-off control of the electromagnetic control valve of the battery cooling circuit, and at the same time turns on the battery water pump and adjusts the speed of the battery water pump to gradually increase to the target battery water pump speed of the dual-cooling mode. The second switching unit 320 is used to gradually reduce the speed of the battery water pump when switching from dual-cooling mode to single-occupant cabin cooling mode. When the speed of the battery water pump reaches a second preset value, it performs reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit, and at the same time, it gradually reduces the speed of the electric compressor to the speed corresponding to the single-occupant cabin cooling mode.

[0038] In one implementation of this application embodiment, when the first switching unit switches from a single-passenger cabin cooling mode to a dual-cooling mode, the gradual increase in the speed of the electric compressor includes: The electric compressor speed gradually increases to the target electric compressor speed of the dual-cooling mode within a first preset time period. When the electric compressor speed reaches the first preset value, the electromagnetic control valve of the battery cooling circuit is activated to perform intermittent on-off control, wherein the first preset value is less than the target electric compressor speed of the dual-cooling mode.

[0039] In one implementation of this application, the first switching unit performs intermittent on / off control of the solenoid control valve of the battery cooling circuit, including: The solenoid control valve of the battery cooling circuit is opened for a second preset time and then closed for a third preset time, and this on-off process is repeated a preset number of times.

[0040] In one implementation of this application embodiment, the first switching unit activates the battery water pump and gradually increases the battery water pump speed to the target battery water pump speed in the dual cooling mode, including: The battery water pump is started at the same time as the electromagnetic control valve of the battery cooling circuit is opened for the first time. The battery water pump slowly increases to the target battery water pump speed of the dual cooling mode for a fourth preset time. The fourth preset time is longer than the first preset time when the electric compressor increases its speed when switching from the single occupant cabin cooling mode to the dual cooling mode.

[0041] In one implementation of this application embodiment, when the second switching unit switches from dual-cooling mode to single-passenger cabin cooling mode, gradually decreasing the speed of the battery water pump includes: The battery water pump gradually reduces its speed from the target battery water pump speed in the dual-cooling mode to the shutdown speed over a fourth preset duration. When the battery water pump speed drops to the second preset value, the reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit is initiated. The fourth preset duration is consistent with the duration of the battery water pump speed-up when switching from the single-occupant cabin cooling mode to the dual-cooling mode.

[0042] In one implementation of this application, the second switching unit performs reverse intermittent on / off control of the solenoid control valve of the battery cooling circuit, including: The solenoid valve of the battery cooling circuit is closed for a third preset duration and then opened for a second preset duration. This on / off process is repeated a preset number of times. The second preset duration is the same as the opening duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode. The third preset duration is the same as the closing duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode.

[0043] In one implementation of this application embodiment, when the second switching unit switches from dual-cooling mode to single-passenger-cabin cooling mode, regulating the speed of the electric compressor to gradually decrease includes: At the same time as the electromagnetic control valve of the battery cooling circuit is closed for the first time, the speed of the electric compressor is adjusted to decrease. The electric compressor gradually decreases to the speed corresponding to the single-occupant cabin cooling mode within a fifth preset time period, wherein the fifth preset time period is longer than the fourth preset time period for the battery water pump to decelerate when switching from dual cooling mode to single-occupant cabin cooling mode.

[0044] This application also provides corresponding devices and computer storage media for implementing the solutions provided in this application.

[0045] The device includes a memory and a processor. The memory stores instructions or code, and the processor executes the instructions or code to cause the device to perform the method described in any embodiment of this application.

[0046] The computer storage medium stores code, and when the code is run, the device running the code implements the method described in any embodiment of this application.

[0047] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the methods of the above embodiments can be implemented by means of software plus a general-purpose hardware platform. Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as a read-only memory (ROM) / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0048] It is understood that in the specific embodiments of this application, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved need to obtain user permission or consent when the above embodiments of this application are applied to specific products or technologies, and the collection, use and processing of related data need to comply with the relevant laws, regulations and standards of relevant countries and regions.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0050] It should also be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for the device and apparatus embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiments. The device and apparatus embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components indicated as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of the solution in this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0051] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method for a dual electromagnetic control valve refrigeration system in a new energy vehicle, characterized in that... The method is applied to new energy vehicles employing a dual electromagnetic control valve refrigeration system. This system includes an electric compressor and a battery water pump, as well as independent yet collaboratively operable passenger compartment refrigeration circuit and battery refrigeration circuit. The passenger compartment refrigeration circuit is equipped with a passenger compartment refrigeration circuit electromagnetic control valve, and the battery refrigeration circuit is equipped with a battery refrigeration circuit electromagnetic control valve. When switching from single-passenger cabin cooling mode to dual-cooling mode, the speed of electric compressor is gradually increased. When the speed of electric compressor reaches the first preset value, the electromagnetic control valve of battery cooling circuit is intermittently switched on and off. At the same time, the battery water pump is turned on and the speed of battery water pump is gradually increased to the target battery water pump speed of dual-cooling mode. When switching from dual-cooling mode to single-occupant cabin cooling mode, the speed of the battery water pump is gradually reduced. When the speed of the battery water pump reaches a second preset value, the electromagnetic control valve of the battery cooling circuit is subjected to reverse intermittent on / off control, and the speed of the electric compressor is gradually reduced to the speed corresponding to the single-occupant cabin cooling mode.

2. The method according to claim 1, characterized in that, When switching from single-occupant cabin cooling mode to dual-cooling mode, the gradual increase in the speed of the electric compressor includes: The electric compressor speed gradually increases to the target electric compressor speed of the dual-cooling mode within a first preset time period. When the electric compressor speed reaches the first preset value, the electromagnetic control valve of the battery cooling circuit is activated to perform intermittent on-off control, wherein the first preset value is less than the target electric compressor speed of the dual-cooling mode.

3. The method according to any one of claims 1 or 2, characterized in that, The intermittent on / off control of the electromagnetic control valve in the battery cooling circuit includes: The solenoid control valve of the battery cooling circuit is opened for a second preset time and then closed for a third preset time, and this on-off process is repeated a preset number of times.

4. The method according to claim 1, characterized in that, The target battery water pump speed for gradually increasing the battery water pump speed to the dual cooling mode includes: The battery water pump is started at the same time as the electromagnetic control valve of the battery cooling circuit is opened for the first time. The battery water pump slowly increases to the target battery water pump speed of the dual cooling mode for a fourth preset time. The fourth preset time is longer than the first preset time when the electric compressor increases its speed when switching from the single occupant cabin cooling mode to the dual cooling mode.

5. The method according to claim 1, characterized in that, When switching from dual-cooling mode to single-occupant cabin cooling mode, the gradual decrease in the speed of the battery water pump includes: The battery water pump gradually reduces its speed from the target battery water pump speed in the dual-cooling mode to the shutdown speed over a fourth preset duration. When the battery water pump speed drops to the second preset value, the reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit is initiated. The fourth preset duration is consistent with the duration of the battery water pump speed-up when switching from the single-occupant cabin cooling mode to the dual-cooling mode.

6. The method according to claim 1, characterized in that, The reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit includes: The solenoid valve of the battery cooling circuit is closed for a third preset duration and then opened for a second preset duration. This on / off process is repeated a preset number of times. The second preset duration is the same as the opening duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode. The third preset duration is the same as the closing duration when the solenoid valve of the battery cooling circuit is intermittently controlled during a switch from single-occupant cabin cooling mode to dual-cooling mode.

7. The method according to claim 1, characterized in that, When switching from dual-cooling mode to single-occupant cabin cooling mode, the gradual decrease in the speed of the electric compressor includes: At the same time as the electromagnetic control valve of the battery cooling circuit is closed for the first time, the speed of the electric compressor is adjusted to decrease. The electric compressor gradually decreases to the speed corresponding to the single-occupant cabin cooling mode within a fifth preset time period, wherein the fifth preset time period is longer than the fourth preset time period for the battery water pump to decelerate when switching from dual cooling mode to single-occupant cabin cooling mode.

8. A control device for a dual electromagnetic control valve refrigeration system in a new energy vehicle, characterized in that... This device is applied to new energy vehicles employing a dual electromagnetic control valve refrigeration system. The system includes an electric compressor and a battery water pump, as well as independent yet collaboratively functioning passenger compartment refrigeration circuit and battery refrigeration circuit. The passenger compartment refrigeration circuit is equipped with a passenger compartment refrigeration circuit electromagnetic control valve, and the battery refrigeration circuit is equipped with a battery refrigeration circuit electromagnetic control valve. The device includes: The first switching unit is used to gradually increase the speed of the electric compressor when switching from the single-occupant cabin cooling mode to the dual-cooling mode. When the speed of the electric compressor reaches the first preset value, the unit intermittently controls the on / off of the electromagnetic control valve of the battery cooling circuit, and at the same time turns on the battery water pump and gradually increases the speed of the battery water pump to the target battery water pump speed of the dual-cooling mode. The second switching unit is used to gradually reduce the speed of the battery water pump when switching from dual-cooling mode to single-occupant cabin cooling mode. When the speed of the battery water pump reaches a second preset value, it performs reverse intermittent on / off control of the electromagnetic control valve of the battery cooling circuit, and at the same time, it gradually reduces the speed of the electric compressor to the speed corresponding to the single-occupant cabin cooling mode.

9. A computing device, characterized in that, The computing device includes: a memory and a processor; The memory is used to store computer programs; The processor is configured to implement the steps of the method as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method as described in any one of claims 1 to 7.

Images