Low-temperature quick starting system suitable for air conditioner compressor of new energy automobile

Abstract

The invention relates to the technical field of compressor starting, in particular to a low-temperature quick starting system suitable for a new energy automobile air conditioner compressor, which comprises a temperature acquisition unit, a preheating unit, a current acquisition unit, a timing unit and an analysis unit. And when it is determined that the operation of the compressor is abnormal, the operation parameters of the compressor are corrected based on the operation temperature, the operation power of the compressor or the heating current of the compressor is adjusted, the current of the preheating unit and the operation power of the compressor are adjusted according to actual conditions, and the operation efficiency of the compressor is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor starting, and in particular to a low-temperature rapid starting system suitable for an air-conditioning compressor of a new energy vehicle. Background Art

[0002] With the development of new energy technologies, electric vehicles have become a future development trend. Unlike traditional fuel vehicles, fuel vehicles heat in winter by preheating the engine and the compressor does not need to run. Electric vehicles do not have the engines of traditional fuel vehicles, and winter heating needs to rely on compressors to provide heat.

[0003] However, in the low temperature environment of winter, when the electric vehicle is parked in the external environment for a period of time, the refrigerant stored in the evaporator, condenser and pipelines will migrate to the suction side of the compressor. When the compressor starts, the liquid refrigerant will be sucked into the pump body by the compressor. Due to the incompressibility of the liquid, liquid hammer will occur, causing damage to the pump body components.

[0004] Chinese Patent Publication No.: CN118927953A, discloses a startup control method, device, equipment and storage medium for a vehicle air-conditioning compressor, including obtaining a first shell temperature of the compressor in response to a received anti-liquid hammer instruction for the compressor; if the first shell temperature meets a preset preheating trigger condition, generating a first power supply control signal according to the first shell temperature; according to the first power supply control signal, controlling the power conversion device connected to the compressor to provide a first startup electrical signal to the compressor, and the electrical parameters of the first startup electrical signal are less than the preset maximum operating electrical parameters; It can be seen that the above technical solution has the following problems: it does not consider adjusting the current of the preheating unit and the operating power of the compressor according to actual conditions when it is determined that the compressor is operating abnormally, which affects the operating efficiency of the compressor. Summary of the Invention

[0005] To this end, the present invention provides a low-temperature quick start system suitable for the air-conditioning compressor of new energy vehicles, which is used to overcome the problem in the prior art that when it is determined that the compressor is operating abnormally, the current of the preheating unit and the operating power of the compressor are adjusted according to the actual situation, thereby affecting the operating efficiency of the compressor.

[0006] To achieve the above objectives, the present invention provides a low-temperature rapid starting system for an air-conditioning compressor of a new energy vehicle, comprising: The temperature collection unit includes a first temperature collection unit provided in the vehicle for collecting the temperature inside the vehicle and a second temperature collection unit provided on one side of the compressor for collecting the operating temperature of the compressor; The preheating unit is arranged on the side wall of the compressor and is used to generate heat energy by inputting current to heat and melt the transmission oil inside the compressor; a current collection unit connected to the preheating unit and configured to collect the heating current of the compressor by the preheating unit; a timing unit connected to the preheating unit and configured to record the running time of the preheating unit; An analysis unit is respectively connected to the temperature acquisition unit, the preheating unit, the current acquisition unit and the preheating unit, and is used to determine whether the quick start of the compressor is qualified based on the temperature in the vehicle, and when it is determined that the operation of the compressor is abnormal, correct the operating parameters of the compressor based on the operating temperature, including adjusting the operating power of the compressor or adjusting the heating current of the compressor.

[0007] Furthermore, the analysis unit is configured to determine whether the operation of the compressor is qualified based on the in-vehicle temperature when the operating time reaches an integer multiple of a preset monitoring time, including: If the temperature inside the vehicle is greater than the second preset temperature, the compressor is judged to be operating properly, and the preheating unit is controlled to continue operating using the current operating parameters; If the vehicle interior temperature is less than or equal to the second preset temperature and greater than the first preset temperature, determining a temperature change parameter based on the drawn vehicle interior temperature time domain curve, and determining whether the operation of the compressor is qualified based on the temperature change parameter; If the temperature inside the vehicle is less than or equal to the first preset temperature, it is determined that the operation of the compressor is abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

[0008] Furthermore, the analysis unit is used to determine a temperature change parameter based on the drawn time-domain curve of the vehicle interior temperature, and determine whether the operation of the compressor is qualified based on the temperature change parameter, including: for drawing a time domain curve of the vehicle interior temperature based on the vehicle interior temperatures at a plurality of time nodes acquired by the first temperature acquisition unit; The slope of the time-domain curve of the vehicle interior temperature at the current node is recorded as the temperature change parameter; If the temperature change parameter is greater than the preset temperature change parameter, the preset monitoring time is adjusted based on the temperature change parameter, and when the operating time reaches the adjusted preset monitoring time, whether the operation of the compressor is qualified is determined based on the re-acquired vehicle interior temperature; If the temperature change parameter is less than or equal to the preset temperature change parameter, it is determined that the operation of the compressor is abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

[0009] Furthermore, the analysis unit is used to adjust the preset monitoring time based on the temperature change parameter, wherein, The increase in the preset monitoring time determined based on the temperature change parameter is inversely proportional; The analysis unit is used to determine whether the operation of the compressor is qualified based on the re-acquired vehicle interior temperature when the operating time reaches the adjusted preset monitoring time; if the re-acquired vehicle interior temperature is greater than a second preset temperature, the operation of the compressor is determined to be qualified, and the preheating unit is controlled to continue to operate using the current operating parameters; if the re-acquired vehicle interior temperature is less than or equal to the second preset temperature, the operation of the compressor is determined to be abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

[0010] Furthermore, the analysis unit is used to correct the operating parameters of the compressor based on the operating temperature, including: If the operating temperature is greater than a second preset operating temperature, adjusting the operating power of the compressor to a corresponding value based on the vehicle interior temperature; If the operating temperature is less than or equal to the second preset operating temperature and greater than the first preset operating temperature, the operating parameters of the compressor are corrected based on the operating time obtained by the timing unit; If the operating temperature is less than or equal to the first preset operating temperature, the input current of the preheating unit is adjusted to a corresponding value based on the operating temperature.

[0011] Furthermore, the analysis unit is used to adjust the operating power of the compressor to a corresponding value based on the temperature inside the vehicle, wherein: The operating power of the compressor increases inversely proportional to the temperature inside the vehicle.

[0012] Furthermore, the analysis unit is used to correct the operating parameters of the compressor based on the operating time obtained by the timing unit, including: If the running time is less than or equal to the preset running time, adjusting the input current of the preheating unit to a corresponding value based on the running time; If the operating time is greater than the preset operating time, the operating power of the compressor is adjusted to a corresponding value based on the vehicle interior temperature.

[0013] Furthermore, the analysis unit is used to adjust the input current of the preheating unit to a corresponding value based on the operating time, wherein, The increase in input current is inversely proportional to the operating time.

[0014] Furthermore, the analysis unit is used to adjust the input current of the preheating unit to a corresponding value based on the operating temperature, wherein, The input current increases inversely with the operating temperature.

[0015] Furthermore, the analysis unit is used to adjust the operating power of the compressor to a corrected operating power after adjusting the input current of the preheating unit to a corresponding value based on the operating duration, and the corrected operating power is the product of the initial operating power and the correction parameter.

[0016] Compared with the prior art, the beneficial effects of the present invention lie in that a temperature acquisition unit, a preheating unit, a current acquisition unit, a timing unit and an analysis unit are provided to determine whether the quick start of the compressor is qualified based on the temperature inside the vehicle, and when it is determined that the operation of the compressor is abnormal, the operating parameters of the compressor are corrected based on the operating temperature, including adjusting the operating power of the compressor or adjusting the heating current of the compressor, and adjusting the current of the preheating unit and the operating power of the compressor according to actual conditions, thereby improving the operating efficiency of the compressor.

[0017] Furthermore, whether the compressor is operating properly is determined based on the vehicle interior temperature. The vehicle interior temperature indicates whether the air-conditioning compressor has achieved rapid startup. When the vehicle interior temperature is greater than a second preset temperature, it indicates that the vehicle interior temperature can rise rapidly in a low temperature environment. In this case, the compressor starts well and works effectively. When the vehicle interior temperature is less than or equal to the second preset temperature and greater than the first preset temperature, the vehicle interior temperature is low. At this time, it is impossible to accurately determine whether the compressor is starting properly based on the temperature value alone. In this case, a temperature change parameter is determined by plotting a vehicle interior temperature time domain curve, and whether the compressor is operating properly is determined based on the temperature change parameter. The temperature change parameter indicates the rising trend of the vehicle interior temperature. When the temperature change parameter is greater than the preset temperature change parameter, it indicates that the temperature rises rapidly and the compressor is working properly. In this case, the vehicle interior temperature is low due to a low initial temperature or aging of the compressor. In this case, the preset monitoring time is adjusted based on the temperature change parameter, and when the operating time reaches the adjusted preset monitoring time, whether the compressor is operating properly is determined based on the re-acquired vehicle interior temperature. The monitoring standard is adjusted according to the adaptability of the actual environment to improve the monitoring accuracy of the compressor. If the re-acquired interior temperature is still low, the compressor is determined to be operating abnormally and its operating parameters are adjusted based on the operating temperature. If the temperature change parameter is less than or equal to the preset temperature change parameter, and the interior temperature is rising slowly, the compressor is determined to be operating abnormally. This accurately locates the abnormality and takes appropriate action, providing intelligent and precise monitoring of the compressor to ensure it can quickly and effectively raise the interior temperature, thereby improving its operating efficiency.

[0018] Furthermore, when determining abnormal compressor operation, the compressor operating temperature is detected. If the operating temperature is greater than a second preset operating temperature, the compressor operating temperature is high. In this case, the compressor itself is operating normally, but the vehicle interior temperature is low due to insufficient compressor power. In this case, the compressor operating power is adjusted. If the operating temperature is less than or equal to the first preset operating temperature, the operating temperature is low. In this case, due to a problem with the preheating unit, the transmission oil in the compressor is not melted in time, thus affecting the compressor heating effect. In this case, the input current of the preheating unit is adjusted to increase the preheating temperature of the compressor. When the operating temperature is less than or equal to the second preset operating temperature and greater than the first preset operating temperature, the preheating unit operation time is detected to determine the specific condition of the compressor. If the operation time is less than or equal to the preset operation time, it is due to an abnormality in the coordination between the preheating unit and the compressor, resulting in a failure to quickly heat up. In this case, the input current of the preheating unit is adjusted. In low temperature environments, the transmission oil in the compressor becomes viscous, affecting the startup and operation of the compressor. By increasing the input current to the resistance heating belt, the thermal effect of the current is used to generate heat, melting the internal transmission oil, reducing starting resistance and improving heating efficiency. After adjusting the preheating unit's input current to the corresponding value based on the operating duration, the compressor's operating power is adjusted to the corrected operating power. The system determines the coordinated operation of the preheating unit and the compressor. If the coordination is unsatisfactory, the system promptly adjusts the current and power to better coordinate the two, thereby improving the compressor's operating efficiency. When the operating duration exceeds the preset operating duration, the in-vehicle temperature cannot be maintained even after the preheating unit has been operating for a long time. In this case, the compressor is abnormal and the temperature cannot be quickly raised. In this case, the compressor's operating power is adjusted to the corresponding value based on the in-vehicle temperature. The problem is accurately located and appropriate treatment measures are taken. This improves the compressor's operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a module block diagram of a low-temperature rapid start system for an air-conditioning compressor of a new energy vehicle according to an embodiment of the present invention; Figure 2 This is a logic decision diagram for the analysis unit according to an embodiment of the present invention to determine whether the operation of the compressor is qualified based on the temperature inside the vehicle. DETAILED DESCRIPTION

[0020] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0021] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0023] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] See also Figure 1 as well as Figure 2 As shown in the figure, they are respectively a module block diagram of a low-temperature rapid starting system for a new energy vehicle air-conditioning compressor according to an embodiment of the present invention, and a logic determination diagram for an analysis unit to determine whether the compressor is operating properly based on the in-vehicle temperature; a low-temperature rapid starting system for a new energy vehicle air-conditioning compressor according to an embodiment of the present invention comprises: The temperature collection unit includes a first temperature collection unit provided in the vehicle for collecting the temperature inside the vehicle and a second temperature collection unit provided on one side of the compressor for collecting the operating temperature of the compressor; The preheating unit is arranged on the side wall of the compressor and is used to generate heat energy by inputting current to heat and melt the transmission oil inside the compressor; a current collection unit connected to the preheating unit and configured to collect the heating current of the compressor by the preheating unit; a timing unit connected to the preheating unit and configured to record the running time of the preheating unit; An analysis unit is respectively connected to the temperature acquisition unit, the preheating unit, the current acquisition unit and the preheating unit, and is used to determine whether the quick start of the compressor is qualified based on the temperature in the vehicle, and when it is determined that the operation of the compressor is abnormal, correct the operating parameters of the compressor based on the operating temperature, including adjusting the operating power of the compressor or adjusting the heating current of the compressor.

[0025] Specifically, there is no limitation on the specific structure of the preheating unit. It can be a resistance heating belt auxiliary belt set on the outer surface of the compressor, or a current access module that can directly input current to the two poles of the compressor motor. It can be understood that the transmission oil inside the compressor can be heated and melted by generating heat energy through the input current. This will not be elaborated.

[0026] Specifically, a temperature acquisition unit, a preheating unit, a current acquisition unit, a timing unit and an analysis unit are set up to determine whether the quick start of the compressor is qualified based on the temperature inside the vehicle, and when it is determined that the compressor is operating abnormally, the operating parameters of the compressor are corrected based on the operating temperature, including adjusting the operating power of the compressor or adjusting the heating current of the compressor. The current of the preheating unit and the operating power of the compressor are adjusted according to actual conditions, thereby improving the operating efficiency of the compressor.

[0027] Specifically, the analysis unit is configured to determine whether the operation of the compressor is qualified based on the vehicle interior temperature when the operating time reaches an integer multiple of the preset monitoring time, including: If the temperature inside the vehicle is greater than the second preset temperature, the compressor is judged to be operating properly, and the preheating unit is controlled to continue operating using the current operating parameters; If the vehicle interior temperature is less than or equal to the second preset temperature and greater than the first preset temperature, determining a temperature change parameter based on the drawn vehicle interior temperature time domain curve, and determining whether the operation of the compressor is qualified based on the temperature change parameter; If the temperature inside the vehicle is less than or equal to the first preset temperature, it is determined that the operation of the compressor is abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

[0028] Specifically, the first preset temperature W1 is selected within the interval [8° C., 10° C.], and the second preset temperature W2 is selected within the interval [17° C., 20° C.].

[0029] Specifically, the analysis unit is used to determine a temperature change parameter based on the drawn time-domain curve of the vehicle interior temperature, and determine whether the operation of the compressor is qualified based on the temperature change parameter, including: for drawing a time domain curve of the vehicle interior temperature based on the vehicle interior temperatures at a plurality of time nodes acquired by the first temperature acquisition unit; The slope of the time-domain curve of the vehicle interior temperature at the current node is recorded as the temperature change parameter; If the temperature change parameter is greater than the preset temperature change parameter, the preset monitoring time is adjusted based on the temperature change parameter, and when the operating time reaches the adjusted preset monitoring time, whether the operation of the compressor is qualified is determined based on the re-acquired vehicle interior temperature; If the temperature change parameter is less than or equal to the preset temperature change parameter, it is determined that the operation of the compressor is abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

[0030] Specifically, when drawing the time domain curve of the vehicle interior temperature, the method of selecting the time nodes for obtaining the vehicle interior temperature is not limited, and can be a number of time nodes periodically determined with a preset test duration as a period.

[0031] In this embodiment, optionally, the preset test duration is 1 minute, and the preset temperature change parameter B0 is selected within the interval [0.4° C. / min, 0.7° C. / min].

[0032] Specifically, the analysis unit is used to adjust the preset monitoring time based on the temperature change parameter, wherein: The increase in the preset monitoring time determined based on the temperature change parameter is inversely proportional; The analysis unit is used to determine whether the operation of the compressor is qualified based on the re-acquired vehicle interior temperature when the operating time reaches the adjusted preset monitoring time; if the re-acquired vehicle interior temperature is greater than a second preset temperature, the operation of the compressor is determined to be qualified, and the preheating unit is controlled to continue to operate using the current operating parameters; if the re-acquired vehicle interior temperature is less than or equal to the second preset temperature, the operation of the compressor is determined to be abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

[0033] In this embodiment, optionally, Comparing the temperature change parameter with a first preset change comparison threshold and a second preset change comparison threshold; If the temperature change parameter is less than or equal to the first preset change comparison threshold, the preset monitoring time is adjusted to 1.28 times the initial preset monitoring time; If the temperature change parameter is less than or equal to the second preset change comparison threshold and greater than the first preset change comparison threshold, the preset monitoring time is adjusted to 1.21 times the initial preset monitoring time; If the temperature change parameter is greater than the second preset change comparison threshold, the preset monitoring time is adjusted to 1.13 times the initial preset monitoring time; The first preset change comparison threshold is 1.14B0, and the second preset change comparison threshold is 1.29B0.

[0034] Specifically, whether the compressor is operating properly is determined based on the vehicle interior temperature. The vehicle interior temperature indicates whether the air-conditioning compressor has achieved a quick start. When the vehicle interior temperature is greater than the second preset temperature, it indicates that the vehicle interior temperature can rise quickly in a low temperature environment. In this case, the compressor starts well and works effectively. When the vehicle interior temperature is less than or equal to the second preset temperature and greater than the first preset temperature, the vehicle interior temperature is low. At this time, it is impossible to accurately determine whether the compressor is started properly by only using the temperature value. In this case, the vehicle interior temperature time domain curve is drawn to determine the temperature change parameter, and whether the compressor is operating properly is determined based on the temperature change parameter. The temperature change parameter indicates the rising trend of the vehicle interior temperature. When the temperature change parameter is greater than the preset temperature change parameter, it indicates that the temperature rises rapidly and the compressor is working well. In this case, the vehicle interior temperature is low due to the low initial temperature or aging of the compressor. In this case, the preset monitoring time is adjusted based on the temperature change parameter, and when the operating time reaches the adjusted preset monitoring time, whether the compressor is operating properly is determined based on the re-acquired vehicle interior temperature. The monitoring standard is adjusted according to the actual environmental adaptability to improve the monitoring accuracy of the compressor. If the re-acquired interior temperature is still low, the compressor is determined to be operating abnormally and its operating parameters are adjusted based on the operating temperature. If the temperature change parameter is less than or equal to the preset temperature change parameter, and the interior temperature is rising slowly, the compressor is determined to be operating abnormally. This accurately locates the abnormality and takes appropriate action, providing intelligent and precise monitoring of the compressor to ensure it can quickly and effectively raise the interior temperature, thereby improving its operating efficiency.

[0035] Specifically, the analysis unit is used to correct the operating parameters of the compressor based on the operating temperature, including: If the operating temperature is greater than a second preset operating temperature, adjusting the operating power of the compressor to a corresponding value based on the vehicle interior temperature; If the operating temperature is less than or equal to the second preset operating temperature and greater than the first preset operating temperature, the operating parameters of the compressor are corrected based on the operating time obtained by the timing unit; If the operating temperature is less than or equal to the first preset operating temperature, the input current of the preheating unit is adjusted to a corresponding value based on the operating temperature.

[0036] Specifically, the first preset operating temperature Y1 is selected within the interval [20° C., 25° C.], and the second preset operating temperature Y2 is selected within the interval [55° C., 60° C.].

[0037] Specifically, the analysis unit is configured to adjust the operating power of the compressor to a corresponding value based on the vehicle interior temperature, wherein: The operating power of the compressor increases inversely proportional to the temperature inside the vehicle.

[0038] In this embodiment, optionally, Comparing the vehicle interior temperature with a first preset vehicle interior temperature comparison threshold and a second preset vehicle interior temperature comparison threshold; If the vehicle interior temperature is less than or equal to the first preset vehicle interior temperature comparison threshold, adjusting the operating power of the compressor to 1.29 times the initial compressor operating power; If the vehicle interior temperature is less than or equal to the second preset vehicle interior temperature comparison threshold and greater than the first preset vehicle interior temperature comparison threshold, the operating power of the compressor is adjusted to 1.18 times the initial compressor operating power; If the vehicle interior temperature is greater than a second preset vehicle interior temperature comparison threshold, adjusting the operating power of the compressor to 1.11 times the initial compressor operating power; The first preset vehicle interior temperature comparison threshold is 0.4W1, and the second preset vehicle interior temperature comparison threshold is 0.7W1.

[0039] Specifically, the analysis unit is used to correct the operating parameters of the compressor based on the operating time obtained by the timing unit, including: If the running time is less than or equal to the preset running time, adjusting the input current of the preheating unit to a corresponding value based on the running time; If the operating time is greater than the preset operating time, the operating power of the compressor is adjusted to a corresponding value based on the vehicle interior temperature.

[0040] Specifically, the preset running time T0 is selected within the interval [4min, 5min].

[0041] Specifically, the analysis unit is used to adjust the input current of the preheating unit to a corresponding value based on the operating time, wherein, The increase in input current is inversely proportional to the operating time.

[0042] In this embodiment, optionally, Comparing the running time with a first preset time comparison threshold and a second preset time comparison threshold; If the running time is less than or equal to the first preset time comparison threshold, the input current is adjusted to 1.25 times the initial input current; If the running time is less than or equal to the second preset time comparison threshold and greater than the first preset time comparison threshold, adjusting the input current to 1.16 times the initial input current; If the running time is greater than the second preset time comparison threshold, the input current is adjusted to 1.11 times the initial input current; The first preset time length comparison threshold is 0.8T0, and the second preset time length comparison threshold is 0.9T0.

[0043] Specifically, the analysis unit is used to adjust the input current of the preheating unit to a corresponding value based on the operating temperature, wherein, The input current increases inversely with the operating temperature.

[0044] In this embodiment, optionally, comparing the operating temperature with a first preset operating comparison threshold and a second preset operating comparison threshold; If the operating temperature is less than or equal to the first preset operating comparison threshold, adjusting the input current to 1.27 times the initial input current; If the operating temperature is less than or equal to the second preset operating comparison threshold and greater than the first preset operating comparison threshold, adjusting the input current to 1.17 times the initial input current; If the operating temperature is greater than a second preset operating comparison threshold, adjusting the input current to 1.12 times the initial input current; The first preset operation comparison threshold is 0.5Y1, and the second preset operation comparison threshold is 0.75Y1.

[0045] Specifically, the analysis unit is used to adjust the operating power of the compressor to the corrected operating power after adjusting the input current of the preheating unit to a corresponding value based on the operating duration. The corrected operating power is the product of the initial operating power and the correction parameter.

[0046] Specifically, the correction parameter is the product of the duration difference and 0.05, and the duration difference is the difference between the preset running time and the running time.

[0047] Specifically, when determining abnormal compressor operation, the compressor's operating temperature is detected. If the operating temperature is greater than a second preset operating temperature, the compressor's operating temperature is high. In this case, the compressor itself is operating normally, but the vehicle interior temperature is low due to insufficient compressor power. In this case, the compressor's operating power is adjusted. If the operating temperature is less than or equal to the first preset operating temperature, the operating temperature is low. In this case, a problem with the preheating unit prevents the transmission oil in the compressor from melting in time, thus affecting the compressor's heating effect. In this case, the input current of the preheating unit is adjusted to increase the compressor's preheating temperature. When the operating temperature is less than or equal to the second preset operating temperature and greater than the first preset operating temperature, the preheating unit's operating time is detected to determine the compressor's specific condition. If the operating time is less than or equal to the preset operating time, this is due to an abnormality in the coordination between the preheating unit and the compressor, resulting in a failure to quickly heat up. In this case, the input current of the preheating unit is adjusted. In low-temperature environments, the transmission oil in the compressor becomes viscous, affecting the compressor's startup and operation. By increasing the input current to the resistance heating belt, the thermal effect of the current is used to generate heat, melting the internal transmission oil, reducing starting resistance and improving heating efficiency. After adjusting the preheating unit's input current to the corresponding value based on the operating duration, the compressor's operating power is adjusted to the corrected operating power. The system determines the coordinated operation of the preheating unit and the compressor. If the coordination is unsatisfactory, the system promptly adjusts the current and power to better coordinate the two, thereby improving the compressor's operating efficiency. When the operating duration exceeds the preset operating duration, the in-vehicle temperature cannot be maintained even after the preheating unit has been operating for a long time. In this case, the compressor is abnormal and the temperature cannot be quickly raised. In this case, the compressor's operating power is adjusted to the corresponding value based on the in-vehicle temperature. The problem is accurately located and appropriate treatment measures are taken. This improves the compressor's operating efficiency.

[0048] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0049] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A low-temperature quick start system suitable for new energy vehicle air-conditioning compressors, characterized in that: include: The temperature collection unit includes a first temperature collection unit provided in the vehicle for collecting the temperature inside the vehicle and a second temperature collection unit provided on one side of the compressor for collecting the operating temperature of the compressor; The preheating unit is arranged on the side wall of the compressor and is used to generate heat energy by inputting current to heat and melt the transmission oil inside the compressor; a current collection unit connected to the preheating unit and configured to collect the heating current of the compressor by the preheating unit; a timing unit connected to the preheating unit and configured to record the running time of the preheating unit; An analysis unit is respectively connected to the temperature acquisition unit, the preheating unit, the current acquisition unit and the preheating unit, and is used to determine whether the quick start of the compressor is qualified based on the temperature in the vehicle, and when it is determined that the operation of the compressor is abnormal, correct the operating parameters of the compressor based on the operating temperature, including adjusting the operating power of the compressor or adjusting the heating current of the compressor.

2. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 1 is characterized in that: The analyzing unit is configured to determine whether the operation of the compressor is qualified based on the vehicle interior temperature under the condition that the operation time reaches an integer multiple of the preset monitoring time, including: If the temperature inside the vehicle is greater than the second preset temperature, the compressor is judged to be operating properly, and the preheating unit is controlled to continue operating using the current operating parameters; If the vehicle interior temperature is less than or equal to the second preset temperature and greater than the first preset temperature, determining a temperature change parameter based on the drawn vehicle interior temperature time domain curve, and determining whether the operation of the compressor is qualified based on the temperature change parameter; If the temperature inside the vehicle is less than or equal to the first preset temperature, it is determined that the operation of the compressor is abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

3. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 2 is characterized in that: The analysis unit is used to determine a temperature variation parameter based on the drawn time-domain curve of the vehicle interior temperature, and to determine whether the operation of the compressor is qualified based on the temperature variation parameter, including: for drawing a time domain curve of the vehicle interior temperature based on the vehicle interior temperatures at a plurality of time nodes acquired by the first temperature acquisition unit; The slope of the time-domain curve of the vehicle interior temperature at the current node is recorded as the temperature change parameter; If the temperature change parameter is greater than the preset temperature change parameter, the preset monitoring time is adjusted based on the temperature change parameter, and when the operating time reaches the adjusted preset monitoring time, whether the operation of the compressor is qualified is determined based on the re-acquired vehicle interior temperature; If the temperature change parameter is less than or equal to the preset temperature change parameter, it is determined that the operation of the compressor is abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

4. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 3 is characterized in that: The analysis unit is used to adjust the preset monitoring time based on the temperature change parameter, wherein, The increase in the preset monitoring time determined based on the temperature change parameter is inversely proportional; The analysis unit is used to determine whether the operation of the compressor is qualified based on the re-acquired vehicle interior temperature when the operating time reaches the adjusted preset monitoring time; if the re-acquired vehicle interior temperature is greater than a second preset temperature, the operation of the compressor is determined to be qualified, and the preheating unit is controlled to continue to operate using the current operating parameters; if the re-acquired vehicle interior temperature is less than or equal to the second preset temperature, the operation of the compressor is determined to be abnormal, and the operating parameters of the compressor are corrected based on the operating temperature.

5. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 4 is characterized in that: The analysis unit is used to correct the operating parameters of the compressor based on the operating temperature, including: If the operating temperature is greater than a second preset operating temperature, adjusting the operating power of the compressor to a corresponding value based on the vehicle interior temperature; If the operating temperature is less than or equal to the second preset operating temperature and greater than the first preset operating temperature, the operating parameters of the compressor are corrected based on the operating time obtained by the timing unit; If the operating temperature is less than or equal to the first preset operating temperature, the input current of the preheating unit is adjusted to a corresponding value based on the operating temperature.

6. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 5 is characterized in that: The analysis unit is used to adjust the operating power of the compressor to a corresponding value based on the temperature in the vehicle, wherein: The operating power of the compressor increases inversely proportional to the temperature inside the vehicle.

7. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 6 is characterized in that: The analyzing unit is configured to correct the operating parameters of the compressor based on the operating time obtained by the timing unit, including: If the running time is less than or equal to the preset running time, adjusting the input current of the preheating unit to a corresponding value based on the running time; If the operating time is greater than the preset operating time, the operating power of the compressor is adjusted to a corresponding value based on the vehicle interior temperature.

8. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 7 is characterized in that: The analysis unit is used to adjust the input current of the preheating unit to a corresponding value based on the operating time, wherein, The increase in input current is inversely proportional to the operating time.

9. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 8, characterized in that: The analysis unit is used to adjust the input current of the preheating unit to a corresponding value based on the operating temperature, wherein, The input current increases inversely with the operating temperature.

10. The low-temperature rapid starting system for the air-conditioning compressor of a new energy vehicle according to claim 9, characterized in that: The analysis unit is used to adjust the operating power of the compressor to the corrected operating power under the condition that the input current of the preheating unit is adjusted to the corresponding value based on the operating time. The corrected operating power is the product of the initial operating power and the correction parameter.

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