CN101499691A

CN101499691A - Motor structure for compressor

Info

Publication number: CN101499691A
Application number: CNA2008100522580A
Authority: CN
Inventors: 李宏
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2008-02-03
Filing date: 2008-02-03
Publication date: 2009-08-05

Abstract

The invention discloses a motor structure of a compressor, comprising a shell which consists of a cylinder, an upper cover, a lower cover and the like. The shell is internally provided with a motor and a compressor component; the motor component consists of a stator, a rotor, a crankshaft and the like; and the compressor component consists of a gas cylinder, an upper bearing, a lower bearing and the like. The lower end of the crankshaft is provided with an upper magnet; the middle part of the internal side of the lower cover is provided with a lower magnet; and the upper magnet and the lower magnet have the same polarity and face to each other. As two magnets which have the same magnetic pole and face to each other are arranged at the lower end of the crankshaft and at the middle part of the internal side of the lower cover, the previous upward electromagnetic force is replaced by the generated repulsive force, the useless work is reduced and the efficiency of the motor is improved.

Description

Motor structure for compressor

Technical field

The invention belongs to a kind of motor structure for compressor, be specifically related to a kind of at two blocks of magnet of bent axle lower end increase, so that improve the motor structure for compressor of electric efficiency.

Background technology

As shown in Figure 1, the compressor of prior art is equipped with motor 20 in the upper inside of housing 1, at the downside of motor 20 compressor assembly 30 that is equipped with separated by a distance.Housing 1 is made up of cylindrical drum 11, loam cake 12 and the lower cover 13 etc. of hollow.Motor 20 is pressed on the inner peripheral surface that is fixed on cylindrical shell 11, and it is made up of stator 21, rotor 22 and rotary crankshaft 23 of being pressed into the center that is fixed on rotor 22 and transmitting revolving force etc.

Compressor assembly 30 is by cylinder 31, upper bearing 32 and lower bearing 33, at the inner eccentric part 23a that forms rotating shaft 23 of the compression stroke (C) of cylinder 31, be positioned at the outside of eccentric part 23a, being provided with can rotation and the rolling piston 35 of revolution by eccentric part 23a, one side contacts with the excircle upper thread of rolling piston 35, and is the impeller structures such as (not shown) of suction area and compressional zone with compression stroke (C) zoning that the outer circumference surface of the inner peripheral surface of cylinder 31 and rolling piston 35 forms.The suction inlet (not shown) that also is communicated with the suction pipe in the suction area in the cylinder 31, and the outlet (not shown) that is used to discharge compressed media in the compressional zone.

In addition, be provided with outlet (not shown) in the upper bearing 32, its upside binding is fixed with muffler 34, is used to reduce the noise that is produced by pressure differential from the compressed media gas of outlet discharge.For making dielectric gas be discharged to seal casinghousing 1 outside by muffler 34, on loam cake 12, be provided with discharge pipe 50, also be provided with suction pipe 40 in the bottom of seal casinghousing 1

As shown in Figure 2, for reduce between bent axle and the lower bearing 33 wearing and tearing, the iron core of compressor drum 22 is higher than the iron core of stator 21, its difference in height B is about 0～1.5mm.When compressor operating, stator produces an electromagnetic force that makes progress to rotor, because rotor links to each other with bent axle, so bent axle also is subjected to active force upwards, offsets the branch gravity of amazing rotor and bent axle, reduces the pressure to lower bearing 33, reduces wearing and tearing.But the electromagnetic force that makes progress is not done work to compression process, has in fact reduced efficiency of motor.

Summary of the invention

The present invention its objective is that providing a kind of increases by two blocks of magnet in the bent axle lower end, so that improve the motor structure for compressor of electric efficiency for the shortcoming that overcomes prior art proposes.

Technical scheme of the present invention is: a kind of motor structure for compressor, comprise housing, and housing is made up of cylindrical shell, loam cake and lower cover etc.Motor and compressor assembly are installed in housing, motor is made up of stator, rotor and bent axle etc., compressor assembly is made up of cylinder, upper bearing and lower bearing etc., be provided with magnet in the lower end of bent axle, middle inside at lower cover is provided with lower magnet, and the same polarity of last magnet and lower magnet is relative.

Because the model difference of compressor, the weight of its bent axle and rotor is also different, when the magnetic field intensity of force that is provided with between magnet and the lower magnet, can be between bent axle 23 and rotor 22 gravity sums 0.3～1 times by the magnetic field force between last magnet 60 and the lower magnet 70.The distance of two magnet is not more than 10mm.

The present invention is owing to be provided with two blocks of magnet that same pole is relative in the lower end of bent axle and the middle inside of lower cover, and the electromagnetic force that makes progress before the repulsive force of generation has replaced has reduced idle work, has improved efficiency of motor.

Description of drawings

Fig. 1 is the longitudinal sectional drawing of the compressor of prior art;

Fig. 2 is the stator of compressor electric motor of prior art and the enlarged drawing of rotor installation site;

Fig. 3 is the longitudinal sectional drawing of compressor of the present invention.

Wherein:

1 housing, 11 cylindrical shells, 12 loam cakes

13 lower covers, 20 motors, 21 stators

22 rotors, 23 bent axle 23a eccentric parts

30 compressor assemblies, 31 cylinders, 32 upper bearing (metal)s

33 lower bearings, 34 mufflers, 35 pistons

Magnet on 40 suction pipes, 50 discharge pipes 60

70 lower magnets

Embodiment

Below, with reference to drawings and Examples motor structure for compressor of the present invention is elaborated:

As shown in Figure 3, motor structure for compressor of the present invention is included in motor 20 and compressor assembly 30 is installed in the compressor housing 1.Motor 20 by be installed in housing 1 upper inside stator 21 and rotor 22 and the rotary crankshaft 23 that is pressed into the center of being fixed in rotor 22 and transmits revolving force etc. form.

Compressor assembly 30 is by the downside of motor 20 cylinder 31 separated by a distance and fixing and be installed in the upper and lower part of cylinder 31, and rotary crankshaft 23 runs through the inside of cylinder 31 and the upper bearing (metal) 32 and the lower bearing 33 of rotatable support; Housing 1 is formed by the cylindrical shell 1 of hollow with the loam cake 12 of the upper and lower end opening perimeter solder joint of cylindrical shell 1 and lower cover 13 etc.On housing 1 returning apparatus suction pipe 40, discharge pipe 50, at housing 1 inner returning apparatus muffler 34.

Be provided with magnet 60 in the lower end of bent axle 23, be provided with lower magnet 70 in the middle inside of lower cover 13.Because the model difference of compressor, the weight of its bent axle and rotor is also different, when the magnetic field intensity of force that is provided with between magnet and the lower magnet, can be bent axle 23 and rotor 22 gravity sums 0.3～1 times by the magnetic field force between last magnet 60 and the lower magnet 70.The distance of two magnet is not more than 10mm, all is toroidal.Last magnet 60 is relative with the same polarity of lower magnet 70, and extremely relative as both N, N, perhaps S, S are extremely relative.

Motor structure for compressor of the present invention, owing to be provided with two blocks of magnet that same pole is relative in the lower end of bent axle 23 and the middle inside of lower cover 13, the electromagnetic force that makes progress before the repulsive force of generation has replaced has reduced idle work, has improved efficiency of motor.

Claims

1, a kind of motor structure for compressor, comprise housing (1), housing (1) is by cylindrical shell (11), loam cake (12) and lower cover compositions such as (13), motor (20) and compressor assembly (30) are installed in housing (1), motor (20) is by stator (21), rotor (22) and bent axle compositions such as (23), compressor assembly (30) is by cylinder (31), upper bearing (32) and lower bearing compositions such as (33), it is characterized in that: be provided with magnet (60) in the lower end of bent axle (23), middle inside at lower cover (13) is provided with lower magnet (70), and last magnet (60) is relative with the same pole of lower magnet (70).

2, motor structure for compressor according to claim 1 is characterized in that: the magnetic field force between last magnet (60) and the lower magnet (70) is bent axle (23) and rotor (22) gravity sum 0.3～1 times.

3, motor structure for compressor according to claim 1 is characterized in that: the distance of two magnet (60,70) is not more than 10mm, all is toroidal.