Plastic package motor, plastic package stator and air-conditioner indoor unit

Abstract

The invention discloses a plastic package motor, which comprises a thermal protector, a plastic shell and a stator assembly packaged in the plastic shell, wherein the thermal protector is contacted with the stator assembly and packaged inside the plastic shell. The thermal protector is injection molded inside the plastic shell and directly contacted with the stator assembly, so that the thermal protector can detect the actual temperature of a stator winding directly, thereby effectively avoiding occurrence of a circumstance that a motor winding is burnt out because of delay of the thermal protector; and because the thermal protector is plastic packaged inside the plastic shell directly, a traditional thermal protector bracket is saved, thereby enabling the size of the whole plastic package stator to be reduced, and being conducive to lightening and thinning development of a motor. The invention further discloses a plastic package motor adopting the plastic package stator, and an air conditioner indoor unit adopting the plastic package motor.

Description

technical field [0001] The invention relates to the technical field of plastic-encapsulated motor preparation, and more specifically, relates to a plastic-enclosed motor, a plastic-enclosed stator and an air-conditioning indoor unit. Background technique [0002] The plastic-encapsulated motor is composed of a plastic-encapsulated stator, shaft, rotor, bearing, end cover, thermal protector, lead-out wire, socket and other components. When plastic-sealing, the stator core and lead-out wires wound with coils are first put into the injection-molded metal mold. Then injection molding. [0003] Such as figure 1 As shown in , the thermal protector of the traditional plastic-encapsulated motor is arranged on the outer surface of the plastic-encapsulated stator 01. Specifically, a notch is reserved on the outer circumferential surface of the stator after the plastic encapsulation is completed, and the thermal protector bracket inserted in the notch 02 and the notch jointly constit...

AI Technical Summary

Problems solved by technology

[0005] An additional thermal protector bracket is required, and since the thermal protector bracket itself is not elastic, in order to ensure that the thermal protector can be smoothly placed into the accommodating cavity, it is necessary to make the thickness of the accommodating cavity larger than the thickness of the thermal protector. The structural size of the outlet of the plastic-sealed stator is too large, which is contrary to the current development trend of thinner and lighter motors;

[0006] Since the thickness of the accommodating cavity is greater than that of the thermal protector, the thermal protector cannot fit closely with the outer circle of the plastic-sealed stator, so the temperature sensing of the plastic-sealed stator is not accurate enough; The difference from the actual temperature of the internal winding is 15°C-30°C, so the thermal protector is placed outside the plastic-sealed stator so that it cannot sense the actual temperature of the motor winding in time and delays its action, which will easily lead to the burning of the motor winding. Visible, heat This setting method of the protector also has a relatively large potential safety hazard

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