KR20080054525A - Blower motor structure of refrigerator - Google Patents

Abstract

A blower motor structure of a refrigerator is provided to prevent oil from being sprayed into an inside of a blower motor by blocking the oil passing through an oil accumulation groove by installing an oil fence on an outer circumference surface of a shaft. A blower motor structure of a refrigerator includes a rotor(100), a shaft(200), a stator(300), front and rear housings(400,500), a bearing(600), and a felt(700). The rotor includes a permanent magnet for forming a magnetic field. The stator includes a coil forming the magnetic field by generating a torque by interaction with the magnetic field generated by the permanent magnet of the rotor. The felt is provided on an outer circumference surface of the bearing and contains oil therein. An oil accumulation groove(210) is formed on the outer circumference surface of the shaft being in close contact with an inner circumference surface of the bearing. The oil climbing on the shaft is accumulated in the oil accumulation groove at the time of rotating the shaft.

Description

BLOWER MOTOR STRUCTURE OF REFRIGERATOR}

1 is a cross-sectional view showing a blower motor structure of a conventional refrigerator.

Figure 2 is a cross-sectional view showing a blower motor structure of the refrigerator according to the present invention.

3 is a cross-sectional view showing another embodiment of the present invention.

Figure 4 is a cross-sectional view showing another embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100: rotor

200: Shaft 210, 210 ', 210 ": Oil accumulation groove

300: stator

400: front housing

500: rear housing

600: bearing 610: pore

700: felt

800: oil fence

The present invention relates to a blower motor structure of a refrigerator, and more particularly to a blower motor structure of a refrigerator which prevents oil from being scattered through the oil accumulation groove when the shaft is rotated by forming a groove to accumulate oil in a shaft installed in the blower motor. It is about.

In general, the refrigerator uses a cooling cycle to cool the air in the refrigerator so that foods stored therein are stored for a long time without deterioration.

The refrigerator includes a main body that forms a storage space separated into a refrigerating compartment and a freezing compartment and a door that opens and closes the freezer compartment and the refrigerating compartment, and includes a compressor, a condenser, and an evaporator at the rear of the main body. There is a built-in mechanism for forming the refrigeration cycle.

That is, in the refrigerator, the low-temperature low-pressure gaseous refrigerant is compressed to high temperature and high pressure by the compressor, and the compressed high-temperature high-pressure gas phase refrigerant is cooled and condensed in the course of passing through the condenser and converted into a high-pressure liquid state. As the refrigerant passes through the capillary tube, its temperature and pressure are lowered, and then it is continuously changed into a gaseous state of low temperature and low pressure in the evaporator to take heat from the surroundings to cool the air around it.

Then, the air cooled through the evaporator is circulated in the freezing and refrigerating chamber by the operation of the blower fan located at one side of the evaporator, and the blower fan is rotated by the blower motor.

As shown in FIG. 1, the blower motor of the configuration as described above is combined with the rotor 10 and the rotor 10 having a permanent magnet for forming a magnetic field, and the rotor 10 integrally with the rotor 10. Stator 30 having a rotating shaft 20, a coil for generating torque by interaction with a magnetic field generated by the permanent magnet of the rotor 10 to form a magnetic field, and the stator 30 It comprises a circuit board (not shown) for applying power to the coil of the control and the front and rear housings 40 and 50 coupled in a form surrounding the rotor 10 and the stator 30.

In addition, bearings 60 are installed on the support surfaces of the shaft 20 and the front and rear housings 40 and 50, and a plurality of pores 61 are formed on the surface of the bearing 50.

In addition, the outer circumferential surface of the bearing 60 is provided with a felt 70 containing oil, the oil contained in the felt 70 through the pores 61 of the bearing 60 shaft 20 When rotating, it is lubricated.

Therefore, the lubricating action as described above can reduce the frictional force during the rotation of the shaft 20, thereby reducing the noise significantly.

However, the oil contained in the felt 70 is a cryogenic oil, which is thinner than the general oil, and comes up on the outer circumferential surface of the shaft 20 when the blower motor rotates, and the oil passing through the inner circumferential surface of the bearing 60 is There was a problem that scattered in all directions by the rotational force of the shaft 20.

Therefore, as the oil is scattered as described above, the oil contained in the felt 70 decreases, and thus, there is a problem in that friction noise and rotational failure are not generated due to the failure of smooth lubrication when the shaft 20 rotates.

The present invention has been made to solve the above problems, an object of the present invention is to form an oil accumulation groove on the outer circumferential surface of the shaft is coupled to the bearing built in the blower motor to accumulate oil in the oil accumulation groove during shaft rotation It is to provide a blower motor structure of the refrigerator to prevent the scattering of oil.

Still another object is to install oil fences on the outer circumferential surfaces of the shafts on which the upper and lower surfaces of the bearings are located, to block the oil coming up through the shaft and to allow the oil to flow back into the oil accumulation groove.

Blowing motor structure of the refrigerator of the present invention for achieving the above object,

A rotor having a permanent magnet for forming a magnetic field, a shaft coupled to the rotor to rotate integrally with the rotor, generates a torque by interaction with the magnetic field generated by the permanent magnet of the rotor to generate a magnetic field A stator having a coil to form, a front and rear housing coupled to surround the rotor and the stator, each bearing coupled between the shaft and the front and rear housings, and having a plurality of pores formed on a surface thereof, and And a felt provided on the outer circumferential surface and containing oil therein, and an oil accumulation groove is formed on the outer circumferential surface of the shaft in which the inner circumferential surface of the bearing is in close contact with the oil. It is characterized by being stored.

Here, the oil accumulation groove is characterized in that the spiral is formed along the outer peripheral surface of the shaft.

In addition, the oil accumulation groove is characterized in that it is formed horizontally along the outer peripheral surface of the shaft.

In addition, the oil accumulation groove is characterized in that it is formed in a straight shape along the longitudinal direction of the shaft.

In addition, oil fences are provided on the outer circumferential surfaces of the shaft in which the upper and lower surfaces of the bearing are located, respectively, and the oil fences are positioned at the front end and the end of the oil accumulation groove, respectively.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

The blower motor of the present invention, as shown in Figure 2, for rotating the blowing fan located on one side of the evaporator, the rotor 100 having a permanent magnet for forming a magnetic field, and the rotor 100 and Is coupled to the shaft 200 and integrally rotates with the rotor 100, provided on the outer peripheral surface of the rotor 100 generates a torque by interaction with the magnetic field generated by the permanent magnet to form a magnetic field Stator 300 having a coil to the front and rear housings 400 and 500 coupled through the front and rear of the shaft 200 in a form surrounding the rotor 100 and the stator 300 and The bearing 600 is coupled between the shaft 200 and the front and rear housings 400 and 500, respectively, and a plurality of pores 610 are formed on a surface thereof, and is provided on an outer circumferential surface of the bearing 600 and is provided therein. A felt 700 containing oil.

That is, the blower motor is coupled to the front and rear housings 400 and 500 in a direction in which the open spaces face each other, and the shaft is rotatable to the center of the rear housing 500 through the center of the front housing 400. 200 is coupled, the rotor 100 is coupled to the outer circumferential surface of the shaft 200 located inside the front and rear housings 400 and 500, the stator 300 is installed on the outer circumferential surface of the rotor The bearings 600 are coupled to the outer circumferential surface of the shaft 200 and the support surfaces of the front and rear housings 400 and 500, respectively, and the front and rear housings 400 and 500 of the bearing 600 are outside. The open space of the felt 700 has a coupling structure provided.

Shaft 200 of the configuration of the blower motor is for transmitting a rotational force to the blowing fan (not shown), the blowing fan is coupled to the front end is coupled to rotate integrally with the shaft 200, the other end of the front housing ( Pass through the center of the 400 is rotatably coupled to the end surface of the rear housing (500).

The bearing 600 is to reduce friction and noise by lubricating when the shaft 200 rotates, and between the outer circumferential surface of the shaft 200 and the inner circumferential surfaces of the front and rear housings 400 and 500, respectively. A plurality of pores 610 are formed in the outer circumferential surface to penetrate in the direction of the inner circumferential surface.

The felt 700 is manufactured by fusion of wool or other wool fibers, and is loaded in the empty open spaces of the outer circumferential surface of the bearing 600 and the front and rear housings 400 and 500, and a thin oil is contained therein. The oil is supplied to the pores 610 of the bearing 600.

Therefore, the bearing 600 is always supplied with oil through the felt 700 to lubricate the outer circumferential surface of the shaft 200 to reduce friction and noise when the shaft 200 rotates.

Here, the oil accumulation groove 210 is formed on the outer circumferential surface of the shaft 200 to accumulate oil that rides on the outer circumferential surface thereof when the shaft 200 rotates.

The oil accumulation groove 210 is to prevent the oil from escaping from the inside of the blower motor by accumulating oil coming up from its outer circumferential surface when the shaft 200 rotates, and the shaft 200 in close contact with the inner circumferential surface of the bearing 600. It is formed spirally on the outer circumferential surface of the.

Therefore, when the shaft 200 rotates, a part of the oil passing through the pores 610 of the bearing 600 rises along the outer circumferential surface of the shaft 200 and accumulates in the spiral oil accumulation groove 210. This will block the movement of oil.

In addition, oil fences 800 for regulating the movement of oil are installed on the outer circumferential surfaces of the shaft 200 in which the front and rear surfaces of the bearing 600 are located, respectively.

The oil fence 800 is for blocking the oil passing through the oil accumulation groove 210 formed on the outer circumferential surface of the shaft 200, has a donut shape, the inner circumferential surface is coupled to the outer circumferential surface of the shaft 200, It is located at the tip and the end of the oil accumulation groove 210.

Therefore, the movement of oil is primarily blocked through the oil accumulation groove 210, and the movement of oil is secondarily blocked through the oil fence 800.

4 and 5 show another embodiment of the oil accumulation groove according to the present invention.

The oil accumulation grooves 210 ′ and 210 ″ may be formed horizontally along the outer circumferential surface of the shaft 200 as shown in FIG. 4, and as shown in FIG. 5, along the longitudinal direction of the shaft 200. It may be formed in a straight shape.

As described above, although the preferred embodiment of the present invention has been described, the present invention is not limited to the above embodiment, and is easily changed and equivalent to those skilled in the art from the embodiments of the present invention. Includes all changes and modifications to the extent permitted.

By forming an oil accumulation groove on the outer circumferential surface of the shaft to which the bearing embedded in the blower motor is coupled as described above, it is possible to prevent oil from scattering inside the blower motor, thereby preventing rotational defects and noise generation of the blower motor. It has an effect.

In addition, by installing the oil fence on the outer peripheral surface of the shaft in which the front and rear surfaces of the bearing, respectively, there is an effect that can significantly prevent the oil from scattering inside the blower motor by blocking the oil passing through the oil accumulation groove.

Claims (5)

A rotor having a permanent magnet for forming a magnetic field, A shaft coupled to the rotor and integrally rotating with the rotor, A stator having a coil for generating a magnetic field by generating torque by interaction with a magnetic field generated by the permanent magnet of the rotor, Front and rear housings coupled in a form surrounding the rotor and the stator, Bearings each coupled between the shaft and the front and rear housings and having a plurality of pores formed on a surface thereof; and It includes a felt provided on the outer circumferential surface of the bearing and containing oil therein, An oil accumulation groove is formed on an outer circumferential surface of the shaft in which the inner circumferential surface of the bearing is in close contact with each other, and the oil that rises on the shaft is stored in the oil accumulation groove when the shaft rotates. The method of claim 1, The oil accumulation groove of the refrigerator blower motor structure, characterized in that formed in the spiral along the outer peripheral surface of the shaft. The method of claim 1, The oil accumulation groove of the refrigerator blower motor structure, characterized in that formed horizontally along the outer circumferential surface of the shaft. The method of claim 1, The oil accumulation groove is a blower motor structure of the refrigerator, characterized in that formed in a straight shape along the longitudinal direction of the shaft. The method according to any one of claims 1 to 4, Oil fences are installed on the outer circumferential surfaces of the shaft where the upper and lower surfaces of the bearing are located, respectively, and the oil fences are positioned at the front and the end of the oil accumulation groove, respectively. rescue.

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