Door switch and refrigerator car that has this door switch

The utility model discloses a door switch to and having a refrigerator car of this door switch, this door switch includes the proximity switch sensor, dome lamp in connecting device and the railway carriage or compartment be connected through connecting device and proximity switch sensor, wherein, the proximity switch sensor includes first inductor and second inductor, first inductor is fixed in on the back door of the railway carriage or compartment body, the second inductor passes through the fix with screw and just sets up with first inductor interval on the inside ceiling panel of railway carriage or compartment, the second inductor is used for according to distance control second inductor self closing or disconnection between first inductor and the second inductor, and when second inductor self closing, the second inductor, the dome lamp constitutes closed -loop and opens and produce sensing signal with dome lamp in the control railway carriage or compartment in connecting device and the railway carriage