CN-122008809-A - Control method and device for double-electromagnetic control valve refrigerating system of new energy automobile

CN122008809ACN 122008809 ACN122008809 ACN 122008809ACN-122008809-A

Abstract

The application discloses a control method, a device, equipment and a storage medium for a double-electromagnetic control valve refrigerating system of a new energy automobile, which relate to the technical field of automobile heat management and realize stable distribution of refrigerating capacity in a mode switching process through time sequence coordination and stepped rotating speed regulation of an electric compressor, a battery refrigerating circuit electromagnetic control valve and a battery water pump. When the single-passenger cabin refrigerating mode is switched to the double-refrigerating mode, the rotating speed of the electric compressor is increased, the total refrigerating capacity of the system is increased, the refrigerating capacity is distributed by being matched with intermittent on-off of the electromagnetic control valve, the speed of the battery water pump is slowly increased, and a large amount of diversion of the refrigerant is avoided. When the double-refrigerating mode is switched to the single-passenger cabin refrigerating mode, the rotating speed of the battery water pump is reduced, the refrigerating consumption is reduced, the refrigerating capacity is recovered by reverse intermittent on-off of the electromagnetic control valve, the motor-driven compressor is synchronously and slowly slowed down, and the concentrated reflux of the refrigerant is avoided. The flow rate of the refrigerant and the pressure of the system can be kept stable, and the refrigerating comfort of the passenger cabin is ensured.

Inventors

LI RONGFENG
ZHAO YAN
MENG PINGPING
CHANG XIN
Ban Fengmei
CHEN ZHU
WANG SHU
CAI ZHICHENG
MA JIKAI

Assignees

柳州五菱新能源汽车有限公司

Dates

Publication Date: 20260512
Application Date: 20260302

Claims (10)

1. The control method of the double electromagnetic control valve refrigerating system of the new energy automobile is characterized by being applied to the new energy automobile adopting the double electromagnetic control valve refrigerating system, wherein an electric compressor and a battery water pump are arranged in the double electromagnetic control valve refrigerating system, a passenger cabin refrigerating circuit and a battery refrigerating circuit which are mutually independent and can work cooperatively are also arranged, the passenger cabin refrigerating circuit is provided with an electromagnetic control valve of the passenger cabin refrigerating circuit, and the battery refrigerating circuit is provided with an electromagnetic control valve of the battery refrigerating circuit, and the method comprises the following steps: When the single passenger cabin refrigerating mode is switched to the double refrigerating mode, regulating and controlling the rotation speed of the electric compressor to gradually increase, and when the rotation speed of the electric compressor reaches a first preset value, performing intermittent on-off control on the electromagnetic control valve of the battery refrigerating loop, starting a battery water pump and regulating and controlling the rotation speed of the battery water pump to gradually increase to the target rotation speed of the battery water pump in the double refrigerating mode; When the double-refrigerating mode is switched to the single-passenger cabin refrigerating mode, the rotation speed of the battery water pump is regulated and controlled to gradually decrease, and when the rotation speed of the battery water pump reaches a second preset value, the electromagnetic control valve of the battery refrigerating loop is subjected to reverse intermittent on-off control, and meanwhile, the rotation speed of the electric compressor is regulated and controlled to gradually decrease to the rotation speed corresponding to the single-passenger cabin refrigerating mode.
2. The method of claim 1, wherein said regulating the motor-compressor speed step-up when the single-cabin cooling mode is switched to the dual-cooling mode comprises: And the rotating speed of the electric compressor is gradually increased to the target rotating speed of the electric compressor in the double-refrigeration mode within a first preset time period, and when the rotating speed of the electric compressor is increased to the first preset value, the electromagnetic control valve of the battery refrigeration loop is started to be intermittently controlled to be on-off, wherein the first preset value is smaller than the target rotating speed of the electric compressor in the double-refrigeration mode.
3. The method of any one of claims 1 or 2, wherein intermittently on-off controlling the battery refrigeration circuit solenoid control valve comprises: and controlling the electromagnetic control valve of the battery refrigeration loop to be opened for a second preset time period, closing a third preset time period, and circularly executing the on-off process for preset times.
4. The method of claim 1, wherein turning on the battery water pump and regulating the battery water pump speed to gradually increase to a target battery water pump speed for a dual cooling mode comprises: And starting the battery water pump when the electromagnetic control valve of the battery refrigerating circuit is started for the first time, and slowly increasing the battery water pump to the target battery water pump rotating speed of the double-refrigerating mode in a fourth preset time period, wherein the fourth preset time period is longer than the first preset time period of the motor-driven compressor rotating speed increasing when the single-passenger cabin refrigerating mode is switched to the double-refrigerating mode.
5. The method of claim 1, wherein regulating the battery water pump speed to gradually decrease when switching from the dual cooling mode to the single passenger compartment cooling mode comprises: The battery water pump slowly drops to a stop rotation speed from a target battery water pump rotation speed in a double-refrigeration mode in a fourth preset duration, reverse intermittent on-off control of the electromagnetic control valve of the battery refrigeration loop is started when the battery water pump rotation speed drops to the second preset value, and the fourth preset duration is consistent with the battery water pump speed-up duration when the single-passenger cabin refrigeration mode is switched to the double-refrigeration mode.
6. The method of claim 1, wherein said reverse intermittent on-off control of said battery refrigeration circuit solenoid control valve comprises: The method comprises the steps of controlling the electromagnetic control valve of the battery refrigerating circuit to be closed for a third preset time period, starting the electromagnetic control valve of the battery refrigerating circuit for a second preset time period, and circularly executing preset times for the on-off process, wherein the second preset time period is consistent with the time period when the electromagnetic control valve of the battery refrigerating circuit is subjected to one-time intermittent on-off control when the refrigerating mode of the single passenger cabin is switched to the double refrigerating mode, and the third preset time period is consistent with the time period when the electromagnetic control valve of the battery refrigerating circuit is subjected to one-time intermittent on-off control when the refrigerating mode of the single passenger cabin is switched to the double refrigerating mode.
7. The method of claim 1, wherein regulating the motor-compressor speed step down when switching from the dual cooling mode to the single passenger compartment cooling mode comprises: And regulating and controlling the rotation speed of the electric compressor to be reduced when the electromagnetic control valve of the battery refrigerating circuit is closed for the first time, wherein the electric compressor is gradually reduced to the rotation speed corresponding to the single-passenger-cabin refrigerating mode within a fifth preset time period, and the fifth preset time period is longer than a fourth preset time period for reducing the speed of the battery water pump when the double-refrigerating mode is switched to the single-passenger-cabin refrigerating mode.
8. The utility model provides a new energy automobile double electromagnetic control valve refrigerating system controlling means, its characterized in that is applied to the new energy automobile that adopts double electromagnetic control valve refrigerating system, be provided with electric compressor and battery water pump in the double electromagnetic control valve refrigerating system, still be provided with passenger cabin refrigerating circuit and battery refrigerating circuit that are independent each other and can work in coordination, passenger cabin refrigerating circuit disposes passenger cabin refrigerating circuit electromagnetic control valve, battery refrigerating circuit disposes battery refrigerating circuit electromagnetic control valve, the device includes: the first switching unit is used for regulating and controlling the rotation speed of the electric compressor to be gradually increased when the single-passenger cabin refrigerating mode is switched to the double-refrigerating mode, and carrying out intermittent on-off control on the electromagnetic control valve of the battery refrigerating loop when the rotation speed of the electric compressor reaches a first preset value, and simultaneously starting the battery water pump and regulating and controlling the rotation speed of the battery water pump to be gradually increased to the target rotation speed of the battery water pump in the double-refrigerating mode; and the second switching unit is used for regulating and controlling the rotation speed of the battery water pump to gradually decrease when the double-refrigerating mode is switched to the single-passenger cabin refrigerating mode, and carrying out reverse intermittent on-off control on the electromagnetic control valve of the battery refrigerating loop when the rotation speed of the battery water pump reaches a second preset value, and regulating and controlling the rotation speed of the electric compressor to gradually decrease to the rotation speed corresponding to the single-passenger cabin refrigerating mode.
9. A computing device, wherein the computing device comprises a memory, a processor; the memory is used for storing a computer program; The processor being adapted to carry out the steps of the method according to any one of claims 1 to 7 when said computer program is executed.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, implements the steps of the method according to any one of claims 1 to 7.

Description

Control method and device for double-electromagnetic control valve refrigerating system of new energy automobile Technical Field The application relates to the technical field of automobile heat management, in particular to a control method, a device, equipment and a storage medium of a double-electromagnetic control valve refrigerating system of a new energy automobile. Background At present, an automobile refrigerating system mainly transfers heat through refrigerant circulation (compression, condensation, expansion and evaporation), so that cooling is realized, and 2 refrigerating loops, namely a passenger cabin refrigerating loop and a battery refrigerating loop exist in part of new energy automobiles. In some new energy commercial vehicles, in order to reduce the cost, an electromagnetic control valve SOV refrigerating system is used for both the passenger cabin refrigerating circuit and the battery refrigerating circuit, but SOVs can only control the on-off of a refrigerant, and cannot adjust the flow rate of the refrigerant, if the control method is improper, when the passenger cabin single refrigerating mode is switched to the double refrigerating mode, a large amount of refrigerant flow rate is separated from the battery refrigerating circuit, the temperature of an air outlet of the passenger cabin can be greatly increased, or when the passenger cabin single refrigerating mode is switched to the double refrigerating mode, the refrigerant of the battery refrigerating circuit can flow to the passenger cabin refrigerating circuit all, and the temperature of the air outlet of the passenger cabin can be greatly reduced, so that the cooling comfort of the passenger cabin is greatly affected. Disclosure of Invention In order to solve the problems, the application provides a control method, a device, equipment and a storage medium for a double-electromagnetic control valve refrigerating system of a new energy automobile, which comprise the following contents: In a first aspect, the application provides a control method of a dual electromagnetic control valve refrigerating system of a new energy automobile, which is applied to the new energy automobile adopting the dual electromagnetic control valve refrigerating system, wherein the dual electromagnetic control valve refrigerating system is provided with an electric compressor and a battery water pump, and is also provided with a passenger cabin refrigerating circuit and a battery refrigerating circuit which are mutually independent and can work cooperatively, the passenger cabin refrigerating circuit is provided with an electromagnetic control valve of the passenger cabin refrigerating circuit, and the battery refrigerating circuit is provided with an electromagnetic control valve of the battery refrigerating circuit, the method comprises the following steps: When the single passenger cabin refrigerating mode is switched to the double refrigerating mode, regulating and controlling the rotation speed of the electric compressor to gradually increase, and when the rotation speed of the electric compressor reaches a first preset value, performing intermittent on-off control on the electromagnetic control valve of the battery refrigerating loop, starting a battery water pump and regulating and controlling the rotation speed of the battery water pump to gradually increase to the target rotation speed of the battery water pump in the double refrigerating mode; When the double-refrigerating mode is switched to the single-passenger cabin refrigerating mode, the rotation speed of the battery water pump is regulated and controlled to gradually decrease, and when the rotation speed of the battery water pump reaches a second preset value, the electromagnetic control valve of the battery refrigerating loop is subjected to reverse intermittent on-off control, and meanwhile, the rotation speed of the electric compressor is regulated and controlled to gradually decrease to the rotation speed corresponding to the single-passenger cabin refrigerating mode. Optionally, when the single passenger cabin refrigeration mode is switched to the dual refrigeration mode, the step-by-step improvement of the rotation speed of the electric compressor comprises: And the rotating speed of the electric compressor is gradually increased to the target rotating speed of the electric compressor in the double-refrigeration mode within a first preset time period, and when the rotating speed of the electric compressor is increased to the first preset value, the electromagnetic control valve of the battery refrigeration loop is started to be intermittently controlled to be on-off, wherein the first preset value is smaller than the target rotating speed of the electric compressor in the double-refrigeration mode. Optionally, the intermittent on-off control of the electromagnetic control valve of the battery refrigeration loop includes: and controlling the electromagnetic control valve of the battery