To detect refrigerant leakage at an early stage.SOLUTION: A determination part 40 of a refrigerant leakage detection device 1 is configured to: acquire a temperature of a driving device measured by a first temperature sensor 22 as an initial driving device temperature and acquire a temperature of refrigerant measured by a second temperature sensor 16 as an initial refrigerant temperature at a vehicle start; and acquire the temperature measured by the first temperature sensor 22 as a current driving device temperature, the temperature measured by the second temperature sensor 16 as a current refrigerant temperature, a flow rate measured by a flow rate sensor 17 as a current flow rate, torque detected by a torque sensor 24 as current torque, a rotation speed measured by a rotation speed sensor 25 as a current rotation speed, and a voltage measured by a voltage indicator 31 as a current voltage when the vehicle operates. The determination part 40 calculates a reference driving device temperature showing an index of the driving device by using the acquired information and determines that the existence/nonexistence of refrigerant leakage by comparing the acquired current driving device temperature with the calculated reference driving device temperature.SELECTED DRAWING: Figure 2
【課題】冷媒の漏れを早期に検知する。【解決手段】冷媒漏れ検知装置1の判定部40は、車両始動時に、第1温度センサ22により測定された駆動装置の温度を初期駆動装置温度として取得するとともに第2温度センサ16により測定された冷媒の温度を初期冷媒温度として取得し、車両作動時に、第1温度センサ22で測定された前記温度を現在駆動装置温度とし、第2温度センサ16で測定された前記温度を現在冷媒温度とし、流量センサ17で測定された流量を現在流量とし、トルクセンサ24で検出されたトルクを現在トルクとし、回転数センサ25で測定された回転数を現在回転数とし、及び、電圧計31で測定された電圧を現在電圧として、それぞれ取得する。判定部40は、取得した情報を用いて駆動装置の指標を示す基準駆動装置温度を算出し、取得した現在駆動装置温度と算出した基準駆動装置温度とを比較することで冷媒の漏れの有無を判定する。【選択図】図2
REFRIGERANT LEAKAGE DETECTION DEVICE
冷媒漏れ検知装置
2024-07-04
Patent
Electronic Resource
Japanese
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