Patent ID: 8749191
Filing Date: 2014-06-10
Classification: H01H

Abstract:
1. A float switch, characterized by comprising a float, a float guide rod, a dry reed pipe detection device and a relay, wherein the float is sheathed on the float guide rod and can slide freely; the dry reed pipe detection device comprises a high-level dry reed pipe, a low-level dry reed pipe and a magnet; the interior of the float guide rod is hollow, the high-level dry reed pipe and the low-level dry reed pipe are arranged at the high level and the low level in the float guide rod respectively and the magnet is arranged in the float; when the water level is low, the height of the float is also low, the low-level dry reed pipe is switched on due to attraction of the magnet, the high-level dry reed pipe can not be switched on because the high-level dry reed pipe is farther away from the magnet and the relay is further switched off through the control of a circuit at this time; when water is slowly injected from the outside, the water level rises slowly, the float also rises slowly, when the water level rises to the high level, the low-level dry reed pipe can not be switched on because the low-level dry reed pipe is farther away from the magnet, the high-level dry reed pipe is switched on because the high-level dry reed pipe is nearer to the magnet, and the relay is further switched on through the control of the circuit.