Fan heater for crane

Abstract

The invention discloses a fan heater for a crane, which comprises three PTC heating elements, a rotating mechanism and a control mechanism which are arranged in a shell; and an impeller is arranged on a shaft head of a motor FM, and the lead ends of the three PTC heating elements are correspondingly connected with an outgoing end of an alternating current contactor KM2 through wires. An air switch KM1, a relay KM3, a fuse RD, a power-off delayer KM4 and the alternating current contactor KM2 are positioned on an end part at one end of the shell and arranged in parallel with the motor FM; A, B and C three-phase alternating current is correspondingly connected with the incoming end of the alternating current contactor KM2; the outgoing end of the alternating current contactor KM2 is correspondingly connected with the three PTC heating elements respectively; and the normally open contact KM3-1 of the relay KM3 is in parallel connection with the normally open contact KM4-1 of the power-off delayer KM4 and forms a circuit with a coil of the motor FM. The fan heater for the crane has the advantages of scientific, reasonable and creative design, compact integral structure, low cost, stable performance, reliability, strong practicability and good development prospect.

Description

technical field [0001] The invention relates to a heater, in particular to a crane heater which is easy to use, simple to operate and high in thermal efficiency. Background technique [0002] With the advancement of science and technology, people's working environment has been continuously improved and improved. As far as the heating in the cab of the "crane and gantry crane" is concerned, because the "crane" is above the factory building and the gantry crane is in the air outside They all move back and forth, and the way of heating has always been a difficult problem to solve. In the north, due to the cold winter, in addition to adopting intermittent working methods to prevent severe cold, it is a common practice in the past to use "electric stoves" in the cab of "crane trains" for heating. However, Because "electric stoves" have low thermal efficiency, waste energy, and more seriously, they are the most unsafe. Therefore, it is absolutely not allowed to use electric stoves...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of science and technology, people's working environment has been continuously improved and improved. As far as the heating in the cab of the "crane and gantry crane" is concerned, because the "crane" is above the factory building and the gantry crane is in the air outside They all move back and forth, and the way of heating has always been a difficult problem to solve. In the north, due to the cold winter, in addition to adopting intermittent working methods to prevent severe cold, it is a common practice in the past to use "electric stoves" in the cab of "crane trains" for heating. However, Because the "electric stove" has low thermal efficiency, wastes energy, and is more serious, it is the most unsafe. Therefore, it is absolutely not allowed to use electric stoves for heating in the crane

[0003] So far there is no heating equipment with high thermal efficiency, safe use and suitable for cranes and outdoor gantry cranes

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