Air conditioner fan

Inactive Publication Date: 2008-07-03
LG ELECTRONICS INC
14 Cites 8 Cited by

AI-Extracted Technical Summary

Problems solved by technology

When the outdoor unit operates, the fan generates most of the noise of the outdoor unit.
In the fan, blades generate more noise than a hub.
Furthermore, the air discharged to the center portion of the grill makes a turbulent flow, thereby decreasing airflow efficiency at the center portion of the grill.
Therefore, the airflow effi...
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Method used

[0039]The outdoor heat exchanger 30 is L-shaped such that the effective area of the outdoor heat exchanger 30 for heat exchange can be increased. However, the outdoor heat exchanger 30 can have other shapes if necessary.
[0044]The hub 110 includes an accommodation recess 113 in an intake end thereof to receive a portion of the motor 40. When the motor 40 is partially inserted in the accommodation recess 113 of the hub 110, a predetermined clearance is formed between the motor 40 and the hub 110. Since the motor 40 is partially inserted into the accommodation recess 113 of the hub 110, the final length of an assembly of the motor 40 and the hub 110 can be reduced. Therefore, the inside space of the case 10 can be saved, and a relatively large fan can be installed in the case 10. Furthermore, since the motor 40 and the hub 110 can be assembled more closely owing to the accommodation recess 113, the vibration of the fan 100 coupled to the motor 40 through the shaft 41 can be reduced. As a result, the fan 100 can blow more air with less noise.
[0061]Since the intake portion 211 of the hub 210 has an increasing diameter, an air resistance at the intake end of the hub 210 can be reduced. Air flows along the intake portion 211 of the hub 210 and is discharged from the discharge portion 212 of the hub 210 in a direction towards blades (now shown) of the fan. In FIG. 5, only the hub 210 of the fan is shown, and the blades of t...
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Benefits of technology

[0010]Embodiments of the present invention provide a fan of an air conditioner th...
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Abstract

A fan of an air conditioner is provided. A discharge portion of a hub of the fan increases in outer diameter toward a discharge end of the hub such that air can diverge from the hub. The hub accommodates a portion of a motor such that the fan can vibrate less when the motor operates.

Application Domain

Pump componentsLighting and heating apparatus +8

Technology Topic

Aerospace engineering

Image

  • Air conditioner fan
  • Air conditioner fan
  • Air conditioner fan

Examples

  • Experimental program(3)

Example

[0056]A fan will now be described in detail according to a second embodiment.
[0057]FIG. 5 is a side view illustrating a fan according to a second embodiment. In FIG. 5, only a hub 210 of the fan is illustrated.
[0058]Referring to FIG. 5, a discharge portion 212 of the hub 210 enlarges towards a discharge end of the hub 210, and an intake portion 211 of the hub 210 enlarges from an intake end of the hub 210 towards the discharge portion 212.
[0059]An inclination angle θ3 of the discharge portion 212 may be different from an inclination angle θ2 of the intake portion 211. For example, the inclination angle θ3 of the discharge portion 212 can be larger than the inclination angle θ2 of the intake portion 211. Alternatively, the inclination angle θ3 of the discharge portion 212 can be the same as the inclination angle θ2 of the intake portion 211. Alternatively, the intake portion 211 can have an increasing diameter as described above, and the discharge portion 212 can have a rounded shape.
[0060]The hub 210 may have an accommodation recess 213 in the intake end thereof to receive the motor 40.
[0061]Since the intake portion 211 of the hub 210 has an increasing diameter, an air resistance at the intake end of the hub 210 can be reduced. Air flows along the intake portion 211 of the hub 210 and is discharged from the discharge portion 212 of the hub 210 in a direction towards blades (now shown) of the fan. In FIG. 5, only the hub 210 of the fan is shown, and the blades of the fan are not shown.
[0062]As explained above, in the current embodiment, each of the intake portion 211 and the discharge portion 212 has an increasing diameter, such that air can be easily discharged from the hub 210 in a direction towards the blades of the fan. Therefore, the air resistance and noise of the hub 210 can be reduced. Furthermore, since air can flow along the hub 210 more easily, an airflow rate along the hub 210 can be increased, and a noise at the hub 210 can be reduced.

Example

[0063]A fan will now be described in detail according to a third embodiment.
[0064]FIG. 6 is a side view illustrating a fan according to a third embodiment. In FIG. 6, only a hub 310 of the fan is illustrated.
[0065]Referring to FIG. 6, a discharge portion 312 of the hub 310 has a gradually increasing diameter toward a discharge end of the hub 310. Furthermore, the discharge portion 312 of the hub 310 is rounded along a centerline of the hub 310. For example, the discharge portion 312 of the hub 310 can be streamlined along the centerline of the hub 310.
[0066]An intake portion 311 of the hub 310 may have a constant diameter.
[0067]The hub 310 may include an accommodation recess 313 in the intake end thereof to receive the motor 40.
[0068]Air can smoothly diverge from the discharge portion 312 of the hub 310 since the discharge portion 312 is streamlined. Therefore, the air resistance and noise at the discharge portion 312 can be relatively small. Furthermore, since air can flow smoothly from the discharge portion 312 in a direction towards the blades (not shown) of the fan, the airflow rate at the hub 310 can increase.

Example

[0069]A fan will now be described in detail according to a fourth embodiment.
[0070]FIG. 7 is a side view illustrating a fan according to a fourth embodiment. In FIG. 7, only a hub 410 of the fan is illustrated.
[0071]Referring to FIG. 7, a discharge portion 412 of the hub 310 can be rounded such that the discharge portion 412 has a gradually increasing diameter toward a discharge end of the hub 410. For example, the discharge portion 412 of the hub 410 can be streamlined along a centerline of the hub 410.
[0072]An intake portion 411 of the hub 410 may have a gradually increasing diameter from an intake end of the 410 to the discharge portion 412.
[0073]An inclination angle θ3 of the discharge portion 412 may be different from an inclination angle θ2 of the intake portion 411. For example, the inclination angle θ3 of the discharge portion 412 can be larger than the inclination angle θ2 of the intake portion 411. Alternatively, the inclination angle θ3 of the discharge portion 412 can be the same as the inclination angle θ2 of the intake portion 411.
[0074]The hub 410 may have an accommodation recess 413 in the intake end thereof to receive the motor 40.
[0075]Since the intake portion 411 of the hub 210 has an increasing diameter, an air resistance at the intake end of the hub 410 can be relatively small. Air flowing along the intake portion 411 of the hub 410 can be smoothly discharged by the rounded discharge portion 412 of the hub 410 in a direction towards blades (not shown) of the fan. Here, since the discharge portion 412 is rounded (streamlined) the air resistance and noise at the discharge portion 412 can be significantly reduced, and thus the airflow rate at the hub 410 can be increased.
[0076]As described above, air can flow efficiently at the discharge portion of the hub of the fan with less noise so that the fan can be applied to various fields.
[0077]Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
[0078]The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present invention. The present teaching can be readily applied to other types of apparatuses. The description of the present invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art.
[0079]The illustrations of the embodiments described herein are intended to provide a general understanding of the structure of the various embodiments. The illustrations are not intended to serve as a complete description of all of the elements and features of apparatus and systems that utilize the structures or methods described herein. Many other embodiments may be apparent to those of skill in the art upon reviewing the disclosure. Other embodiments may be utilized and derived from the disclosure, such that structural and logical substitutions and changes may be made without departing from the scope of the disclosure. Accordingly, the disclosure and the figures are to be regarded as illustrative rather than restrictive.
[0080]One or more embodiments of the disclosure may be referred to herein, individually and/or collectively, by the term “invention” merely for convenience and without intending to voluntarily limit the scope of this application to any particular invention or inventive concept. Moreover, although specific embodiments have been illustrated and described herein, it should be appreciated that any subsequent arrangement designed to achieve the same or similar purpose may be substituted for the specific embodiments shown. This disclosure is intended to cover any and all subsequent adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, will be apparent to those of skill in the art upon reviewing the description.
[0081]The above disclosed subject matter is to be considered illustrative, and not restrictive, and the appended claims are intended to cover all such modifications, enhancements, and other embodiments which fall within the true spirit and scope of the present invention. Thus, to the maximum extent allowed by law, the scope of the present invention is to be determined by the broadest permissible interpretation of the following claims and their equivalents, and shall not be restricted or limited by the foregoing detailed description.
[0082]Although the invention has been described with reference to several exemplary embodiments, it is understood that the words that have been used are words of description and illustration, rather than words of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified. Rather, the above-described embodiments should be construed broadly within the spirit and scope of the present invention as defined in the appended claims. Therefore, changes may be made within the metes and bounds of the appended claims, as presently stated and as amended, without departing from the scope and spirit of the invention in its aspects.

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