Motion recording system, vehicle, motion recording method, and motion recording program

Abstract

The invention provides an operation recording system, a vehicle, an operation recording method, and an operation recording program capable of performing high-precision compressor abnormality analysis. The operation recording system is applied to an electric compressor of a vehicle air-conditioning system provided with an inverter circuit (50), and is provided with: an acquisition unit; acquiring, as abnormality reference information, at least one of temperature information of a predetermined position in the inverter circuit (50), voltage information of the predetermined position in the inverter circuit (50), and current information of the predetermined position in the inverter circuit (50); and a recording processing unit that records, in a predetermined recording unit, the abnormality reference information and time information that can be associated with the abnormality reference information.

Description

Technical Field

[0001] The present invention relates to an action recording system, a vehicle, an action recording method and an action recording program. Background Art

[0002] In an air conditioner, a compressor is used to compress a refrigerant. In the compressor, there is a case where an item is used to detect an operating state and control the operation of the compressor (Patent Documents 1 and 2). Previous technical literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2017-161195 Patent Document 2: Japanese Patent Application Publication No. 2018-74632 Summary of the invention Technical issues to be solved by the invention

[0004] For compressor abnormalities, sometimes simple abnormality detection is performed, such as determining that an abnormality occurs when the voltage drops below a threshold. However, although the comparison of one item (e.g., voltage) with a threshold enables real-time abnormality detection, it is difficult to perform detailed analysis of abnormality detection. The memory installed in the compressor (especially the vehicle air conditioner) has a small capacity so far, for example, it has not yet stored enough data on the operating status. As such, there is room for further improvement in the accuracy of abnormality detection for the compressor.

[0005] The present invention has been made in view of such circumstances, and an object of the present invention is to provide an operation recording system, a vehicle, an operation recording method, and an operation recording program capable of performing high-precision abnormality analysis of a compressor. Means for solving technical problems

[0006] An action recording system involved in one method in some embodiments of the present invention is applied to an electric compressor of a vehicle air-conditioning system having an inverter circuit, and the action recording system comprises: an acquisition unit, which acquires at least any one of temperature information at a specified position in the inverter circuit, voltage information at a specified position in the inverter circuit, and current information at a specified position in the inverter circuit as abnormal reference information; and a recording processing unit, which records the abnormal reference information and time information that can establish a correspondence with the abnormal reference information in a specified recording unit.

[0007] An action recording method involved in one method in some embodiments of the present invention is applied to an electric compressor of a vehicle air-conditioning system having an inverter circuit, and the action recording method includes: an acquisition step, acquiring at least any one of temperature information at a specified position in the inverter circuit, voltage information at a specified position in the inverter circuit, and current information at a specified position in the inverter circuit as abnormal reference information; and a recording processing step, recording the abnormal reference information and time information that can establish a correspondence with the abnormal reference information in a specified recording unit. Effects of the Invention

[0008] According to the present invention, it is possible to perform high-precision abnormality analysis of a compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a diagram showing a schematic configuration of an inverter circuit according to an embodiment of the present invention. Figure 2 This is a schematic configuration diagram showing an example of a hardware configuration of an action recording system according to an embodiment of the present invention. Figure 3 This is a functional block diagram showing the functions of the action recording system according to one embodiment of the present invention. Figure 4 This is a diagram showing an example of generation of a surge current according to one embodiment of the present invention. Figure 5 This is a flowchart showing an example of a processing procedure according to one embodiment of the present invention.

[0010] Hereinafter, an embodiment of an action recording system, a vehicle, an action recording method, and an action recording program according to the present invention will be described with reference to the accompanying drawings.

[0011] (Structure of inverter circuit) Figure 1 1 is a diagram showing a schematic configuration of an inverter circuit 50 according to an embodiment of the present invention. Figure 1 The structure is just an example and other structures may also be used.

[0012] A direct current voltage (DC voltage) is input to the inverter circuit 50. Then, for example, Figure 1 As shown, the DC voltage is input to the filter circuit 11. Figure 1 As shown in FIG. 1 , the filter circuit 11 includes a reactor 12 connected in series and a capacitor (smoothing capacitor) 13 connected in parallel. The filter circuit 11 is a low pass filter (LPF).

[0013] The DC voltage is input to the buffer circuit 14. The buffer circuit 14 is a circuit for suppressing ringing generated in the switch. Figure 1 As shown, the snubber circuit 14 is an RC snubber circuit in which a resistor 15 and a capacitor 16 are directly connected to each other and an RC portion is connected in parallel.

[0014] Furthermore, the DC voltage is connected to the switch unit 17 via the buffer circuit 14. The switch unit 17 is a three-phase inverter circuit. Figure 1 As shown, the electric compressor is composed of six switching elements 18. The switching element 18 is, for example, an IGBT. A three-phase AC is generated by controlling each IGBT and outputted to a motor 19 of the electric compressor.

[0015] Each switching element 18 is controlled by a signal from a motor control circuit 21 to each control terminal. The motor control circuit 21 is controlled by a CPU 22. For example, the CPU 22 outputs a speed command of the motor 19 to the motor control circuit 21. The voltage from the low voltage input 24 is regulated by the power supply circuit 23 and supplied to the CPU 22.

[0016] like Figure 1 As shown, for example, the snubber circuit 14 and the switch unit 17 are configured on a power substrate (inverter substrate) 20 .

[0017] (Structure of the action recording system) The operation recording system 60 records various information of the inverter circuit 50 to detect abnormality of the inverter circuit 50 .

[0018] The motion recording system 60 is mounted on the electric compressor together with the inverter circuit 50, for example. That is, the electric compressor includes the motion recording system 60 and the motor 19. Moreover, the electric compressor is provided in the vehicle air conditioning system. That is, in the vehicle air conditioning system, the refrigerant is compressed by the electric compressor. Moreover, this vehicle air conditioning system is provided in the vehicle.

[0019] Figure 2 1 is a schematic diagram showing an example of a hardware configuration of an action recording system 60 according to an embodiment of the present invention. Figure 2 As shown, the action recording system 60 is a so-called computer, and includes, for example, a CPU (CENTRAL PROCESSING UNIT) 110, a memory 120, an external interface 140, and a communication interface 150. These components are connected to each other directly or indirectly via a bus, and cooperate with each other to execute various processes.

[0020] The CPU 110 executes various processes according to a program stored in the CPU 110 , for example.

[0021] The memory 120 is constituted by a memory such as an EEPROM, etc. For example, information from various sensors is stored in the memory 120 .

[0022] The external interface 140 is an interface for connecting to an external device. Examples of external devices include an external monitor, a USB memory, an external HDD, and the like. Figure 2 In the example shown, only one external interface is illustrated, but a plurality of external interfaces may be provided.

[0023] The communication interface 150 functions as an interface for connecting to a network to communicate with other devices and to transmit and receive information. For example, the communication interface 150 communicates with other devices by wire or wirelessly. As a vehicle, CAN or LIN is used. In addition, wireless communication may be used, such as BLUETOOTH (registered trademark), Wi-Fi, and communication using a dedicated communication protocol. As an example of wired communication, a wired LAN (LOCAL AREANETWORK: local area network) may be used.

[0024] For example, the device may include an input unit 160 and a display unit 170. The input unit 160 is, for example, a user interface for providing instructions, such as a keyboard, a mouse, or a touch pad. The display unit 170 is, for example, a liquid crystal display, an organic EL (ELECTROLUMINESCENCE: electroluminescence) display, etc. The display unit 170 may also be a touch panel display with a touch panel superimposed thereon.

[0025] Figure 3 is a functional block diagram showing the functions of the action recording system 60. Figure 3 As shown, the action recording system 60 includes an acquisition unit 61 , a recording processing unit 62 , a recording unit 63 , and an abnormality detection unit 64 .

[0026] The action recording system 60 is mounted on an electric compressor, for example, but the functions of each unit are not limited to being mounted on the electric compressor. For example, the acquisition unit 61 and the recording processing unit 62 may be mounted on the electric compressor, while the recording unit 63 may be provided in a device different from the electric compressor (for example, a server), or the abnormality detection unit 64 may be provided in a device different from the electric compressor (for example, a server), and the positions of each function may be concentrated in one device or distributed to multiple devices.

[0027] In this embodiment, the action recording system 60 may include the abnormality detection unit 64, but the abnormality detection unit 64 may be omitted. In this case, for example, an inspector or the like may extract and analyze the information recorded in the recording unit 63 to perform abnormality detection.

[0028] The acquisition unit 61 acquires at least one of the temperature information of a specified position in the inverter circuit 50, the voltage information of a specified position in the inverter circuit 50, and the current information of a specified position in the inverter circuit 50 as action information (abnormal reference information). The action information (abnormal reference information) is information used as a reference for abnormality detection. That is, the action information is action information related to the abnormality, specifically, the action information is temperature information, current information, and voltage information. Information other than the above may also be used as action information. For example, the rotation speed of the compressor may also be used.

[0029] The temperature information is at least one of the temperature of the switching element (IGBT) 18 in the inverter circuit 50, the temperature of the capacitor (especially the capacitor 13) in the inverter circuit 50, the temperature of the CPU 22 in the inverter circuit 50, and the temperature of other components that should be observed from a thermal point of view (components pre-set as objects).

[0030] The voltage information is at least one of a voltage applied to the switching element 18 in the inverter circuit 50 , a voltage applied to a capacitor (particularly, the capacitor 13 ) in the inverter circuit 50 , and a surge voltage generated in the inverter circuit 50 .

[0031] The current information is at least one of the current flowing to the switching element 18 in the inverter circuit 50 , the current flowing to the capacitor (particularly the capacitor 13 ) in the inverter circuit 50 , and the surge current generated in the inverter circuit 50 .

[0032] Surge voltage, for example, Figure 4 As a specific example, it is generated in the various parts shown. For example, it is a terminal for supplying DC voltage (positive terminal and negative (GND) terminal), wiring (positive side and negative (GND) side) of the output side of the buffer circuit 14 (input side of the switch unit 17), each three-phase wiring on the output side of the switch unit 17, control wiring of each switching element 18 (wiring from the motor control circuit 21 to the control terminal of each switching element 18), and wiring of the low voltage input 24. For example, the detection of surge voltage is performed in the above-mentioned terminals or wiring. The surge current is also the same as the surge voltage.

[0033] The recording unit 63 is a part capable of recording information. The recording unit 63 is, for example, a memory. The recording unit 63 is, for example, a memory pre-built into the electric compressor. However, the recording unit 63 is not limited to being built into the electric compressor, and may be, for example, provided in a device different from the electric compressor.

[0034] The recording processing unit 62 associates the action information with the time information and records the action information in a predetermined recording unit 63. That is, the recording processing unit 62 performs a process of recording the action information associated with the time information in the recording unit 63.

[0035] Specifically, in the recording processing unit 62, the action information and the time information related to the action information are recorded in association. The time information is, for example, at least one of continuous time, intermittent time and moment. The continuous time is the time during which the action information continuously satisfies the prescribed conditions. For example, the continuous time is the time during which the temperature information continuously becomes above the prescribed value. The intermittent time is the sum of the time during which the action information satisfies the prescribed conditions. Specifically, the intermittent time is the time obtained by summing the continuous time during which the action information satisfies the prescribed conditions within a prescribed period. For example, when the time during which the temperature information continuously becomes above the prescribed value within the prescribed period is T1 and T2, the intermittent time becomes T1+T2. The moment is the detection time of the action information. For example, a correspondence is established between the value detected as the temperature information and its moment. As the time information, it is also possible to use the accumulated operation time. The accumulated operation time (compressor operation time) is, for example, the accumulated time from the time of shipment from the factory.

[0036] When a correspondence is established between temperature information and time information, for example, the object of temperature information acquisition (for example, the temperature of the switching element 18) and the time when the temperature exceeds a certain threshold or the moment when the temperature exceeds a certain threshold are recorded. In this case, the amount of recorded data can be saved. It can also be set to record the value after time integration of the temperature value. As the object of temperature information acquisition, it is effective for abnormality detection to use a component that generates heat such as the switching element 18 or a component that is not heat-resistant and is pre-set as an object as an object. If the heating component is in a high temperature state for a long time, it can be determined as abnormal heating. If the temperature of a heat-sensitive component is high for a long time, it can be determined that the component is abnormal.

[0037] In the case of establishing a correspondence between voltage information and time information, for example, the object of voltage information acquisition (for example, the voltage of the switching element 18) and the time or moment when the voltage exceeds a certain threshold are recorded. In this case, the amount of recorded data can be saved. Alternatively, the value after time integration of the voltage value can be recorded.

[0038] When the current information is associated with the time information, for example, the object of the current information acquisition (for example, the current of the switch element 18) and the time or moment when the current exceeds a certain threshold are recorded. In this case, the amount of recorded data can be saved. Alternatively, the value after the time integration of the current value can be recorded.

[0039] In this way, in the recording processing unit 62, the action information and the time information are established in a corresponding relationship and recorded, so that by referring to the recorded information, abnormality detection can be performed with high accuracy. Regarding the recording, it is also possible to establish a corresponding relationship between the conditions, the surrounding information, the vehicle information, and the compressor information and record them. For example, regarding the recording, it is also possible to establish a corresponding relationship between the vehicle speed, the presence or absence of charging, the ambient temperature, the battery voltage, the compressor speed, the high pressure, the low pressure, etc. and record them.

[0040] The abnormality detection unit 64 performs abnormality detection based on the information recorded in the recording unit 63. Specifically, the abnormality detection unit 64 extracts the information of the recording unit 63 and performs abnormality detection on the inverter circuit 50. As abnormality detection, it can be set to detect that an abnormality has occurred, or it can be set to detect that although an abnormality has not occurred, there is a high possibility of an abnormality (a precursor of abnormality) (prediction of abnormality).

[0041] For example, when recording the object of temperature information acquisition (for example, the temperature of the switching element 18) and the time or moment when the temperature exceeds a certain threshold, when the total time of the temperature indicated by the temperature information being above the threshold becomes above the threshold, it is assumed that the high temperature state continues for a long time, and abnormality detection is performed. When recording the value after time integration of the temperature value, abnormality detection can be performed when the integrated value becomes above the threshold.

[0042] For example, when recording the object of voltage information acquisition (for example, the voltage of the switching element 18) and the time or moment when the voltage exceeds a certain threshold, when the total time of the voltage value indicated by the voltage information being above the threshold becomes above the threshold, it is assumed that the high voltage state continues for a long time, and thus abnormality detection is performed. When recording the value after time integration of the voltage value, abnormality detection can be performed when the integrated value becomes above the threshold.

[0043] For example, when recording the object of current information acquisition (for example, the current of the switching element 18) and the time or moment when the current exceeds a certain threshold, when the total time of the current value indicated by the current information being above the threshold becomes above the threshold, it is assumed that the high current state continues for a long time, and thus abnormality detection is performed. When recording the value after time integration of the current value, abnormality detection can be performed when the integrated value becomes above the threshold.

[0044] The abnormality detection unit 64 performs detection as described above to detect abnormality in the inverter circuit 50. The abnormality detection may output the degree of abnormality or the possibility of abnormality, or may output a flag when the degree of abnormality or the possibility of abnormality exceeds a predetermined value.

[0045] (Processing flow based on the action recording system) Next, refer to Figure 5 , an example of processing based on the above-mentioned action recording system 60 is described. Figure 5 This is a flowchart showing an example of a processing procedure according to the present embodiment. Figure 5 The process is, for example, repeatedly executed within a prescribed control cycle.

[0046] First, motion information is acquired (S101). Then, the motion information is associated with time information and recorded in the recording unit 63 (S102).

[0047] Then, abnormality detection is performed based on the information recorded in the recording unit 63 (S103). The abnormality detection in S103 may be omitted. In this case, for example, the recorded information may be extracted and analyzed by an analyst or the like.

[0048] As described above, according to the action recording system, vehicle, action recording method and action recording program involved in the present embodiment, in the electric compressor of the vehicle air conditioning system, at least one of the temperature information, voltage information and current information is recorded in advance as abnormality reference information, thereby effectively detecting or predicting abnormalities. That is, for example, it is possible to extract information recorded during periodic inspection and perform detailed inspection.

[0049] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the invention.

[0050] In the above embodiment, the case where the action information and the time information are established in correspondence and recorded is exemplified, but the present invention is not limited to this example. For example, the recording processing unit 62 may be configured to record the abnormal reference information and the time information that can establish a correspondence relationship with the abnormal reference information in the prescribed recording unit 63. More specifically, the recording processing unit 62 may be configured to record the abnormal reference information and the time information associated with the abnormal reference information in the prescribed recording unit 63. For example, it can also be set as follows: when the inspector confirms the output signals of various sensors, abnormal noise, or defects detected by various sensors by some method, the information such as the operating time of the compressor at the time of confirmation (an example of "time information") is compared. In this case, when recording the action information ("abnormal reference information"), the action information and the time information are not associated with each other, but only the accumulated operating time from the time of factory shipment is counted. In addition, it can also be set as follows: when the action information is recorded, the accumulated operating time at the recording time is obtained, and it is estimated that the time when the action information is recorded is near the accumulated operating time. In this example, a notification mechanism may be provided to notify an inspector or the like that the action information is recorded. A configuration may be provided to indirectly notify an inspector or the like through abnormality detection from other equipment connected to the compressor. It may also be provided to only perform regular inspections. The notification mechanism is not necessarily provided, and it may be provided to "establish a correspondence relationship" between the action information and the time information by other methods within the scope of the invention.

[0051] The motion recording system, vehicle, motion recording method, and motion recording program described in each of the above-described embodiments can be understood, for example, as follows. In the action recording system (60) involved in the first mode of the present invention, which is applied to an electric compressor of a vehicle air-conditioning system having an inverter circuit (50), the action recording system comprises: an acquisition unit (61) for acquiring at least any one of temperature information at a specified position in the inverter circuit, voltage information at a specified position in the inverter circuit, and current information at a specified position in the inverter circuit as abnormal reference information; and a recording processing unit (62) for recording the abnormal reference information and time information that can establish a correspondence with the abnormal reference information in a specified recording unit (63).

[0052] According to the action recording system involved in the present invention, in the electric compressor of the vehicle air conditioning system, at least one of the temperature information, the voltage information and the current information is recorded in advance as abnormality reference information, thereby effectively detecting or predicting abnormalities. That is, for example, it is possible to extract the information recorded during the periodic inspection and perform a detailed inspection.

[0053] The action recording system involved in the second mode of the present invention can be set as follows in the first mode: the temperature information is at least any one of the temperature of the switching element (18) in the inverter circuit, the temperature of the capacitor in the inverter circuit, and the temperature of the CPU in the inverter circuit.

[0054] According to the operation recording system of the present invention, by using at least one of the temperature of the switching element, the temperature of the capacitor, and the temperature of the CPU as temperature information, effective abnormality reference information can be obtained in the electric compressor of the vehicle air conditioning system.

[0055] The action recording system involved in the third mode of the present invention can be set as follows in the first mode or the second mode: the voltage information is at least any one of the voltage of the switching element in the inverter circuit, the voltage of the capacitor in the inverter circuit and the surge voltage generated in the inverter circuit.

[0056] According to the operation recording system of the present invention, it is possible to use the operation recording system as effective abnormality reference information in the electric compressor of the vehicle air conditioning system.

[0057] The action recording system involved in the fourth mode of the present invention can be set as follows in any one of the first mode to the third mode: the current information is at least any one of the current of the switching element in the inverter circuit, the current of the capacitor in the inverter circuit, and the surge current generated in the inverter circuit.

[0058] According to the operation recording system of the present invention, at least one of the current to the switching element, the current to the capacitor, and the surge current is used as current information, thereby making it possible to use the current information as effective abnormality reference information in the electric compressor of the vehicle air conditioning system.

[0059] The action recording system involved in the fifth aspect of the present invention can be set as follows in any aspect of the first to fourth aspects: the recording unit is a memory pre-built into the electric compressor, or a memory provided in a device different from the electric compressor.

[0060] According to the operation recording system of the present invention, a memory built in the electric compressor may be used as the recording unit, or a memory provided in a device different from the electric compressor may be used.

[0061] The action recording system involved in the 6th mode of the present invention can be set as follows in any mode from the 1st mode to the 5th mode: the time information is at least one of the continuous time during which the abnormal reference information continuously satisfies the specified conditions, the sum of the time during which the abnormal reference information satisfies the specified conditions, that is, the intermittent time, and the detection time of the abnormal reference information.

[0062] According to the action recording system according to the present invention, by using at least any one of the continuous time, the intermittent time, and the detection time as time information, it is possible to efficiently perform abnormality detection.

[0063] The action recording system involved in the 7th mode of the present invention can be set as follows in any one of the 1st mode to the 6th mode: it has an abnormality detection unit (64), and the abnormality detection unit (64) performs abnormality detection based on the information recorded in the recording unit.

[0064] According to the action recording system involved in the present invention, more accurate abnormality detection can be performed based on the information recorded in the recording unit. The abnormality detection can be set to detect the occurrence of an abnormality or to detect that the abnormality has not yet occurred but is likely to occur (a precursor to the abnormality).

[0065] In the action recording system according to the eighth aspect of the present invention, in the seventh aspect, the abnormality detection unit may detect an abnormality when a total of time during which the temperature indicated by the temperature information is equal to or higher than a threshold value is equal to or higher than the threshold value.

[0066] According to the motion recording system of the present invention, since it is assumed that the high temperature state continues for a long time, abnormality detection can be performed.

[0067] In the action recording system according to a ninth aspect of the present invention, in the seventh aspect, the abnormality detection unit may detect an abnormality when a total of time during which the voltage value indicated by the voltage information is greater than or equal to a threshold value becomes greater than or equal to the threshold value.

[0068] According to the operation recording system of the present invention, since it is assumed that the high voltage state continues for a long time, abnormality detection can be performed.

[0069] In the operation recording system according to the tenth aspect of the present invention, in the seventh aspect, the abnormality detection unit may detect an abnormality when a total of a time during which the current value indicated by the current information is equal to or greater than a threshold value becomes equal to or greater than a threshold value.

[0070] According to the operation recording system of the present invention, since it is assumed that the high current state continues for a long time, abnormality detection can be performed.

[0071] An electric compressor according to an eleventh aspect of the present invention comprises the operation recording system and a motor (19) according to any one of the first to tenth aspects.

[0072] A vehicle air conditioning system according to a twelfth aspect of the present invention includes the electric compressor according to the eleventh aspect.

[0073] A vehicle according to a thirteenth aspect of the present invention includes the vehicle air conditioning system according to the twelfth aspect.

[0074] In the action recording method involved in the 14th embodiment of the present invention, which is applied to an electric compressor of a vehicle air-conditioning system having an inverter circuit, the action recording method includes: an acquisition step, acquiring at least any one of the temperature information of a specified position in the inverter circuit, the voltage information of a specified position in the inverter circuit, and the current information of a specified position in the inverter circuit as abnormal reference information; and a recording processing step, recording the abnormal reference information and the time information that can establish a corresponding relationship with the abnormal reference information in a specified recording unit. Explanation of symbols

[0075] 11-filter circuit, 12-reactor, 13-capacitor, 14-buffer circuit, 15-resistance, 16-capacitor, 17-switch unit, 18-switching element, 19-motor, 21-motor control circuit, 22-CPU, 23-power supply circuit, 24-low voltage input, 50-inverter circuit, 60-action recording system, 61-acquisition unit, 62-recording processing unit, 63-recording unit, 64-abnormality detection unit, 110-CPU, 120-memory, 140-external interface, 150-communication interface, 160-input unit, 170-display unit.

Claims

1. An action recording system, applied to an electric compressor of a vehicle air conditioning system having an inverter circuit, the action recording system comprising: an acquisition unit, which acquires at least any one of temperature information at a specified position in the inverter circuit, voltage information at a specified position in the inverter circuit, and current information at a specified position in the inverter circuit as abnormality reference information; and The recording processing unit records the abnormality reference information and the time information that can establish a correspondence relationship with the abnormality reference information in a prescribed recording unit.

2. The motion recording system according to claim 1, wherein: The temperature information is at least any one of a temperature of a switching element in the inverter circuit, a temperature of a capacitor in the inverter circuit, and a temperature of a CPU in the inverter circuit.

3. The motion recording system according to claim 1, wherein: The voltage information is at least one of a voltage applied to a switching element in the inverter circuit, a voltage applied to a capacitor in the inverter circuit, and a surge voltage generated in the inverter circuit.

4. The motion recording system according to claim 1, wherein: The current information is at least any one of a current flowing to a switching element in the inverter circuit, a current flowing to a capacitor in the inverter circuit, and a surge current generated in the inverter circuit.

5. The motion recording system according to claim 1, wherein: The recording unit is a memory preliminarily built into the electric compressor, or a memory provided in a device different from the electric compressor.

6. The motion recording system according to claim 1, wherein: The time information is at least one of the continuous time during which the abnormality reference information continuously satisfies a prescribed condition, the intermittent time which is the sum of the time during which the abnormality reference information satisfies the prescribed condition, and the detection time of the abnormality reference information. 7 . The action recording system according to claim 1 , further comprising an abnormality detection unit configured to detect abnormality based on the information recorded in the recording unit.

8. The motion recording system according to claim 7, wherein: The abnormality detection unit detects an abnormality when the total of the time during which the temperature indicated by the temperature information is equal to or higher than the threshold value becomes equal to or higher than the threshold value.

9. The motion recording system according to claim 7, wherein: The abnormality detection unit detects an abnormality when the total of the time during which the voltage value indicated by the voltage information is equal to or greater than the threshold value becomes equal to or greater than the threshold value.

10. The motion recording system according to claim 7, wherein: The abnormality detection unit detects an abnormality when the total of the time during which the current value indicated by the current information is equal to or greater than the threshold value becomes equal to or greater than the threshold value.

11. An electric compressor comprising the motion recording system according to claim 1 and a motor. 12 . A vehicle air conditioning system comprising the electric compressor according to claim 11 . 13 . A vehicle comprising the vehicle air conditioning system according to claim 12 .

14. An action recording method, applied to an electric compressor of a vehicle air conditioning system having an inverter circuit, the action recording method comprising: an acquisition step of acquiring at least any one of temperature information at a specified position in the inverter circuit, voltage information at a specified position in the inverter circuit, and current information at a specified position in the inverter circuit as abnormality reference information; and The recording processing step records the abnormality reference information and time information that can be associated with the abnormality reference information in a predetermined recording unit.

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