单节机械保温车热工状态的自动控制和调节装置带有大量的接触器和继电器,而且还要在高湿度、多灰尘、剧烈温降以及冲击振动负荷等条件下工作。因此,在运行中进行车辆维护和每个运程前进行预检时,对自动控制元件都有较高的要求。然而,尽管如此,还有些车辆在运行时有的设备不能工作,以至引起货物损坏。可根据制冷和动力装置自动控制元件发生故障的统计资料来确定机组的可靠性。这 Single mechanical thermal truck thermal state of the automatic control and regulation device with a large number of contactors and relays, but also in high humidity, dusty, severe temperature drop and shock vibration load and other conditions work. Therefore, there is a high demand on automatic control components for vehicle maintenance during operation and for pre-inspection before each shipment. However, in spite of this, some of the vehicles in operation may not be able to work and may cause damage to the goods. The reliability of the unit can be determined based on statistical data on the failure of refrigeration and power plant control components. This