Direct-current brushless motor for medical oxygen generator

Abstract

The invention relates to the technical field of medical instruments, in particular to a direct-current brushless motor for a medical oxygen generator. A direct-current brushless motor for a medical oxygen generator comprises a shell, a motor body, a compressor and two molecular sieves which are arranged on an oxygen generator body. An exhaust pipe is arranged on the side wall of the compressor, and the other end of the exhaust pipe is fixedly connected with a valve body. Two connecting pipes are fixedly connected to the side wall of the valve body. The other ends of the two connecting pipes are respectively fixed with the molecular sieves. A speed adjustment mechanism is arranged between the motor body and the compressor. Compared with the prior art, the direct-current brushless motor for the medical oxygen generator has the beneficial effects that the output rotating speed of the motor body can be reduced in an adaptive manner according to the change of the gas pressure in the molecular sieves, so that the motor body is prevented from generating more heat and energy waste in the use process, the use stability and the service life of the motor body are ensured, and the adjustment is more convenient and reliable.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a DC brushless motor for a medical oxygen generator. Background technique [0002] At present, the motors used in medical oxygen generators are generally driven by DC brushless motors. Brushless DC motors (BLDC) are a type of permanent magnet synchronous motors, not real DC motors, and are referred to as BLDC in English. Different from brushed DC motors, brushless DC motors do not use mechanical brush devices, but use square wave self-controlled permanent magnet synchronous motors, replace carbon brush commutators with Hall sensors, and use NdFeB as permanent magnet materials for rotors , Compared with the general traditional DC motor in performance, it has great advantages. [0003] When the existing brushless DC motors used in medical oxygen generators are in use, the output shaft of the motor is directly fixed to the input shaft of the air compressor. However, as the ...

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Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a DC brushless motor for medical oxygen concentrators to solve the problem of the output shaft of the motor when the existing DC brushless motors for medical oxygen concentrators are in use. It is directly fixed to the input shaft of the air compressor. However, as the pressure inside the molecular sieve gradually increases, if the output speed of the brushless DC motor is not adaptively decelerated, the motor will generate more heat during use. Thus affecting the stability and service life of its use

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