KR101227481B1 - dryer - Google Patents

Abstract

The present invention relates to a clothes dryer having a sound insulation structure that blocks motor noise and other noise from propagating outside the clothes dryer.

The present invention, the motor is installed in the clothes dryer, and the rear side of the clothes dryer is formed, the seating portion is formed is seated is a hot air supply duct for supplying the hot air into the drying drum is formed, one side of the seating suction air A back cover having a louver formed therein, a rear supporter coupled to the front of the back cover, and a plurality of suction parts formed around the rear supporter due to the shape of the seating portion and the rear supporter to allow air to flow into the dryer; In the clothes dryer comprising: The seat cover is formed in a shape corresponding to the shape of the lower rim of the rear supporter so that the back cover shields the suction part closer to the motor of the suction part to block noise from propagating to the outside. It provides a clothes dryer characterized in that.

Clothes dryer, suction part, motor noise, sound insulation, back cover, rear supporter

Description

Clothes dryer {dryer}

1 is an exploded perspective view showing an internal configuration of a conventional clothes dryer

2 is a block diagram showing the internal air flow and noise propagation of the clothes dryer of Figure 1

3 is a perspective view illustrating a back cover in a clothes dryer according to a first embodiment of the present invention;

Figure 4 is a block diagram showing the internal air flow and noise propagation of the clothes dryer according to the first embodiment of the present invention

5 is a clothes dryer according to a second embodiment of the present invention.

Figure 6 is a graph showing the noise by frequency in the clothes dryer according to the invention

Description of the Related Art

9: rear supporter 12: hot air supply duct

16 motor 19 exhaust pipe

20: drying duct 130: back cover

131: seating portion 132: suction louver

133: outlet 134a, 134b: suction

135: duct seat A, B: noise reduction

The present invention relates to an exhaust dryer for drying clothes and the like, and more particularly, to a clothes dryer for preventing motor noise from propagating to the outside.

In general, a clothes dryer refers to an apparatus for drying laundry by a series of processes by forcibly supplying hot dry air to wet laundry in a drum.

The clothes dryer as described above is divided into an exhaust type and a condensation type clothes dryer according to a method of treating humid air generated in a drying process of a drying object.

The exhaust clothes dryer supplies air to dry the clothes and discharges the humid air discharged from the drum to the outside of the dryer, and the condensation clothes dryer condenses the humid air discharged from the drum in the condenser After the removal, dry air is fed back into the drum and recycled.

In general, a main body of a clothes dryer includes a base forming a bottom, a front cabinet forming a front, a side cabinet forming a side, a back cover forming a back, and the back cover. The top cover is installed on the front cabinet and the upper side of the side cabinet.

In addition, a control panel is installed at the front of the main body or at the rear of the top cover to allow the user to select a function of the dryer and to know the progress.

In addition, an opening is formed in the front cabinet to enable the loading and withdrawal of the laundry, the door is provided with a door for selectively opening and closing the opening.

In addition, a screw type leg capable of adjusting the height of the main body is installed at each corner of the base.

On the other hand, Figure 1 is an exploded perspective view of the internal configuration of a clothes dryer according to an example of the prior art.

As shown, in the clothes dryer, the drying drum 1 is rotatably installed by receiving the driving force of the motor 16 installed in the base (not shown) forming the bottom of the body. The drying drum 1 is formed in a cylindrical shape so that the front and rear sides are open, and a belt groove 2 around which a belt (not shown) is wound is formed along the middle of the outer circumferential surface.

The belt (not shown) is connected to the shaft of the motor 16 to transfer the rotational force generated by the motor 16 to the drying drum (1).

A drying chamber 5, which is a space in which drying proceeds, is formed in the drying drum 1, and the laundry in the drying drum 1 is pulled up and dropped by rotating the laundry in the drying chamber 5 during rotation. In turn, a plurality of lifters 6 are formed to increase drying efficiency.

In addition, a front support 7 and a rear support 9 are installed to correspond to the front and rear ends of the drying drum 1, respectively. Here, the front supporter 7 and the rear supporter 9 serve to block the front and rear of the drying drum 1 to form a drying chamber 5 and to support the front and rear ends of the drying drum 1, respectively. Done.

The front supporter 7 and the rear supporter 9 are formed with a circular stepped portion so as to correspond to the drying drum 1.

In addition, a sealing member 10 is installed between the front supporter 7 and the rotating drying drum 1 and between the rear supporter 9 and the rotating drying drum 1 to prevent leakage.

Of course, the front supporter 7 and the rear supporter 9 have a plurality of rollers (not shown) for supporting the drying drum 1 at corresponding positions at the front and rear of the drying drum 1, respectively. Is installed.

On the other hand, the front supporter (7) is formed with a through hole (8) for communicating the drying chamber 5 and the outside. The through hole 8 is selectively opened and closed by a door (not shown).

In addition, a hot air supply duct 12 is installed between the rear supporter 9 and the back cover 30. The hot air supply duct 12 serves as a passage for supplying hot air to the drying chamber 5. It is in communication with the drying chamber (5).

The back cover 30 is formed with a concave seating portion 31 on which the hot air supply duct 12 and the rear supporter 9 are seated, and outside air flows into the dryer in one region of the seating portion 31. Intake louvers 32 of the inlet shape is introduced.

In addition, an outlet assembly 13, which is a portion through which air escapes from the drying chamber 5, is provided below the through hole 8 of the front supporter 7. In addition, a lint filter 14 is installed at the outlet assembly 13.

The lint filter 14 serves to filter foreign matter (for example, seams or dust) mixed in the wet air discharged from the drying chamber 5.

Meanwhile, a lint duct 15 is installed to communicate with the outlet assembly 13, and the lint filter 14 is positioned to the inside of the lint duct 15.

A blower 17 is installed to be connected to the lint duct 15 to suck air from the drying chamber 5 through the lint duct 15. The blower 17 is installed on the shaft of the motor 16 and is installed inside the blower housing 18.

One side of the blower housing 18 communicates with the lint duct 15, and an exhaust pipe 19 is connected to the other side. The exhaust pipe 19 is coupled to the outlet 33 formed on one side of the back cover 30 is exposed to the outside of the clothes dryer.

Therefore, the air exiting the drying chamber 5 and passing through the lint duct 15 is discharged to the outside through the exhaust pipe 19 by the blowing action of the blower 17.

On the other hand, the drying duct 20 is connected to the inlet side of the hot air supply duct 12. The drying duct 20 serves to guide the air heated by a heater (not shown) installed therein toward the inlet of the hot air supply duct 12.

Referring to the operation of the clothes dryer according to the prior art configured as described above are as follows.

After putting the laundry into the drying chamber 5 formed in the drying drum 1 and closing the door, pressing the operation button, the belt is wound around the belt groove 2 while power is applied to the motor 16 (not shown). Is driven while the drying drum 1 is rotated.

The blower 17 is operated to force the air of the drying chamber 5 to the exhaust pipe 19 via the lint duct 15. When the air in the drying chamber 5 flows toward the exhaust pipe 19 as described above, outside air is introduced into the drying chamber 5 through the hot air supply duct 12 due to the pressure difference.

At this time, the air supplied to the hot air supply duct 12 is heated and introduced by a heater (not shown).

That is, the outside air introduced through the suction louvers 32 of the back cover 30 flows into the drying duct 20, is heated by the heater, and is supplied toward the hot air supply duct 12 from the drying duct 20. .

The hot air generated as described above is introduced into the drying chamber 5 formed in the drying drum 1 through the hot air supply duct 12 to dry the laundry therein.

On the other hand, the hot air absorbed the moisture contained in the laundry cloth in the drying chamber 5 is to exit the drying chamber 5 through the outlet assembly (13). At this time, the air exiting from the drying chamber 5 through the outlet assembly 13 is made by the suction force of the blower 17. At this time, foreign matter such as dust or seams contained in the air exiting the outlet assembly 13 is filtered while passing through the lint filter 14.

The air passing through the lint filter 14 is discharged to the outside of the dryer through an outlet 33 formed in the back cover 30 through the exhaust pipe 19 by the blowing action of the blower 17.

On the other hand, Figure 2 is a view showing the noise and the flow of air sucked in the conventional clothes dryer. Here, the flow of air is shown by a thick arrow, and the propagation of noise generated in the motor 16 is indicated by a thin arrow.

As shown in FIG. 2, since the upper and lower four corner portions of the rear supporter 9 are chamfered, a difference with the shape of the seating part 31 occurs, so that the rear supporter 9 and the back cover 30 are different. When is combined, the suction portion (34a, 34b, 34c, 34d) is formed in the corner portion of the rear supporter (9).

That is, the suction parts 34a, 34b, 34c, and 34d communicate with the suction louvers 32 at the rear through the rear supporter 9 and the back cover 30 so that external air may flow into the dryer. have.

As shown by the thick arrows in FIG. 2, the air sucked through the suction parts 34a, 34b, 34c, and 34d flows into the drying duct 20. Then, the air heated in the drying duct 20 is supplied to the drying chamber 5 through the hot air supply duct 12 to heat the laundry to evaporate moisture to dry the laundry.

However, such a conventional clothes dryer has the following problems.

In the conventional clothes dryer, while outside air is introduced through the suction units 34a, 34b, 34c, and 34d, noise generated in the dryer may be a window for propagating to the outside as shown by the arrow shown in FIG. .

Noise generated inside the clothes dryer includes driving noise of the motor 16, the blower 17, and the drying drum 1, and noise of the air flowing through the drying duct 20 and the clothes dryer. The noise generated by the motor 16 accounts for the most part.

Such noise is propagated to the outside using air as a medium. If there is a hole that penetrates the outside, such as the suction units 34a, 34b, 34c, and 34d, there is a problem that the noise is easily spread to the outside through the hole. .

Therefore, since the suction parts 34a, 34b, 34c, and 34d are formed to communicate with the suction louvers 32 at the rear, the noise generated inside the dryer is more likely to propagate outside than other parts of the dryer. Has a problem.

In particular, since the motor 16 is installed in the lower part of the dryer, relatively much noise is generated through the lower suction parts 34c and 34d formed at a position closer to the motor 16 than the upper suction parts 34a and 34b. It is spread outside.

The present invention is to solve the above-described problems, an object of the present invention is to improve the structure of the suction portion to which the outside air is introduced to reduce the noise by preventing the noise generated inside the clothes dryer to spread to the outside, the improved It is to provide a clothes dryer to allow sufficient air for drying through the suction unit.

In order to achieve the above object, the present invention, the motor is installed in the clothes dryer, and the rear side of the clothes dryer, the seating portion is formed is seated to the hot air supply duct for supplying hot air into the drying drum is formed, One side of the portion is formed around the rear supporter due to the shape of the back cover, the rear supporter is coupled to the front of the back cover, the seating portion and the rear supporter, the air is introduced into the dryer A clothes dryer comprising a plurality of suction portions introduced; It provides a clothes dryer characterized in that the shielding means for blocking the propagation of noise to the outside by shielding the suction portion of the suction portion closer to the motor.

In this case, the shielding means may be a shielding plate formed separately from the back cover and the rear supporter.

On the other hand, according to another aspect of the present invention, there is provided a seating unit for forming a motor installed inside the clothes dryer and a hot air supply duct for forming a rear surface of the clothes dryer and for supplying hot air into the drying drum. One side is formed around the rear supporter due to the shape of the back cover, the rear supporter is coupled to the front of the back cover, and the seating portion and the rear supporter, the air is introduced into the dryer A clothes dryer comprising a plurality of suction parts; The back cover shields the suction part closer to the motor among the suction parts to block noise from propagating to the outside so that the seating portion has a lower edge shape of the rear supporter. Provided is a clothes dryer characterized in that it is formed in a shape corresponding to the.

According to still another aspect of the present invention, there is provided a seating unit in which a motor provided inside the clothes dryer and a hot air supply duct for forming a rear surface of the clothes dryer and supplying hot air into the drying drum are seated. One side is formed around the rear supporter due to the shape of the back cover, the back cover is formed in the suction louver, the rear supporter coupled to the front of the back cover, the seating portion and the rear supporter, the air into the dryer A clothes dryer comprising a plurality of suction portions introduced; The rear supporter of the clothes dryer, characterized in that the lower portion of the rear supporter is formed so as to correspond to the rim shape of the seating portion so as to shield the suction portion of the suction portion closer to the motor of the suction portion to block the outside of the propagation to the outside. to provide.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The same components as in the prior art are given the same names and the same reference numerals for convenience of description, and detailed description thereof will be omitted.

3 and 4, a clothes dryer according to a first embodiment of the present invention will be described as follows. For reference, in FIG. 4, the flow of air is illustrated by a thick arrow, and the propagation of noise is illustrated by a thin arrow.

The clothes dryer according to the present invention forms a rear surface of a drying chamber 5 (see FIG. 1) in which laundry is dried and supports a rear end of the drying drum 1 (see FIG. 1), and a rear side of the clothes dryer. It comprises a back cover 130 and a hot air supply duct 12 is installed between the rear supporter 9 and the back cover 30.

The rear supporter 9 may have a circular stepped portion corresponding to the drying drum 1, and the hot air supply duct 12 may communicate with the drying chamber 5 at one side of the rear supporter 9. The opening is formed so that.

In addition, a drying duct 20 is connected to an inlet side of the hot air supply duct 12. The drying duct 20 serves to guide the inlet of the hot air supply duct 12 by heating the suctioned outside air.

The back cover 130 is formed with a recess 131 to be recessed so that the hot air supply duct 12 is seated, and barb in which outside air flows into the dryer in one region of the seat 131. Shaped suction louver 132 is formed. In addition, the rear supporter 9 is coupled to the front of the seating portion 131.

In addition, since the upper edge portion of the rear supporter 9 is chamfered, there is a difference from the shape of the seating portion 131, so that the upper edge portion of the rear supporter 9 is the back cover 130. Holes are formed to be suction portions 134a and 134b into which outside air is introduced.

The suction parts 134a and 134b communicate with a suction louver 132 formed at a rear side through a space between the rear supporter 9 and the back cover 130, so that external air is sucked into the dryer.

As shown by the thick arrows in FIG. 4, the outside air sucked from the suction parts 134a and 134b is introduced into the drying duct 20, heated, and then supplied to the hot air supply duct 12.

On the other hand, the seating portion 131 is formed in a shape corresponding to the lower edge shape of the rear supporter 9 is generated in the motor 16 because the lower portion of the rear supporter 9 is in close contact with the back cover 130. To prevent the noise from spreading outside.

At this time, the mounting portion 131 so that the hot air supply duct 12 protrudes to the outside of the rear supporter 9 so that the hot air supply duct 12 may be seated at one side of the seating portion 131. A portion of is also formed in the shape of extending outward.

Therefore, as shown in FIG. 4, unlike the conventional clothes dryer, when the hot air supply duct 12 and the rear supporter 9 are combined with the back cover 130, the rear supporter 9 and the back cover 130 are provided. The portion where the suction portions 34c and 34d (see FIG. 2) were formed between the two and three sides is shielded by the back cover 130 to block the noise of the motor 16 from propagating to the outside.

More specifically, since the rear supporter 9 is in close contact with the lower part of the back cover 130 to block air from flowing between the back cover 130 and the rear supporter 9, the motor 16 The blocking property of the noise transmitted by air as a medium, such as a noise or a flow noise, becomes high.

In addition, even if a separate sound insulating material is not installed in the back cover 130, the blocking property against the noise becomes good due to the characteristics of the material constituting the back cover 130.

For reference, the factors affecting the sound insulation performance of the wall are weight, uniformity and stiffness per unit area.

However, since the back cover 130 is formed of a metal material, the weight per unit area is large, the structure is uniform, and the shielding against noise is good, and the rear supporter 9 is coupled to the back cover 130. The stiffness of the becomes high.

Therefore, as shown in FIG. 6, the blocking property against noise in the 0 to 1000 Hz region of the low frequency band is increased.

Meanwhile, the total opening area of the conventional suction portions 34a, 34b, 34c, 34d (see FIG. 2) is about 90000 mm 2, and the area of the suction portions 134a, 134b according to the present invention is about 18000 mm 2. It is reduced to 20%.

However, even if the area of the suction portions 134a and 134b is reduced as described above, the drying performance is not impeded because a sufficient amount of air is sucked through the suction portions 134a and 134b.

In other words, the drying performance is the degree to which the fabric is dried when the cloth (standard) is put in the drying chamber and dried for a predetermined time. It was found that there was no difference in drying performance in the clothes dryer.

Therefore, the present invention reduces the area of the window through which the noise can propagate to the outside by reducing the area of the suction portions 134a and 134b, and in particular, blocking the noise by shielding the space near the motor 16. As the property is increased, the noise is greatly reduced, and there is no problem in drying performance.

On the other hand, in the first embodiment as described above, the suction formed in the lower portion of the rear supporter 9 of the suction part by modifying the shape of the seating portion 131 in the back cover 130 to correspond to the shape of the rear supporter 9. Although the portions 34c and 34d (see FIG. 2) may not be formed, the back cover 30 and the back cover 30 and the rear supporter 9 are not deformed in the state of the conventional back cover 30 (see FIG. It is also understandable to provide shielding means (not shown) formed separately from the rear supporter 9 to shield the suction portions 34c and 34d.

That is, the suction plate 34c and 34d may be blocked by attaching the shielding plate between the rear supporter and the back cover in a shape capable of shielding the lower suction portions 34c and 34d with a fastening means such as a screw. . At this time, the shielding plate may be made of a metal material such as the material of the back cover.

Alternatively, the suction parts 34c and 34d may be shielded by filling the lower suction parts 34c and 34d with a porous sound absorbing material such as a sponge.

Meanwhile, referring to FIG. 5, the clothes dryer according to the second embodiment of the present invention will be described. Here, the flow of air is shown by a thick arrow, and the propagation of noise is shown by a thin arrow.

The basic configuration of the second embodiment is the same as that of the first embodiment described above, and the same components are given the same names and the same reference numerals for convenience of description, and detailed description thereof will be omitted.

However, in this embodiment, unlike the first embodiment described above, the lower portion of the rear supporter 290 is formed in a shape that can cover the edge of the seating portion 231 of the back cover 130.

Specifically, the back cover 230 is recessed to form a recess 231 so that the hot air supply duct 12 is seated, the lower portion of the rear supporter 290 is formed larger than the edge of the seating portion 231 The seating portion 231 is formed to a sufficient size to cover the rear supporter 290.

That is, when the back cover 230 and the rear supporter 290 are coupled, a portion corresponding to the lower suction parts 34c and 34d of the conventional clothes dryer is shielded by the rear supporter 290.

Therefore, by shielding the lower portion of the back cover 230 in the rear supporter 290 to block the noise generated from the motor 16 to the outside to reduce the noise of the clothes dryer.

In addition, the rear supporter 290 is formed with an opening 291 through which the inlet side of the hot air supply duct 12 is exposed so that the hot air supply duct 12 and the drying duct 20 may be coupled to each other.

On the other hand, the upper edge of the rear supporter 290 is a chamfered, when the rear supporter 290 and the back cover 230 is coupled to the suction portion in communication with the rear suction louver 232, the outside air flows in 234a and 234b are formed.

Therefore, the air is sucked into the drying duct 20 through the suction of the outside air through the suction portions 234a and 234b as shown by the thick arrow, and the noise generated by the motor is shown by the thin arrow. It is blocked at the bottom of the rear supporter 290.

In this case, a part of the noise generated by the motor 16 may be propagated to the outside of the clothes dryer through the suction parts 234a and 234b, but most of the noise is blocked as compared with the related art.

Hereinafter, noise propagation in the clothes dryer according to the present invention will be described with reference to FIG. 6.

Figure 6 is a graph showing the frequency-specific noise generated in the clothes dryer according to the invention and the frequency-specific noise generated in the conventional clothes dryer.

As shown in Figure 6, the clothes dryer according to the present invention has a large effect of reducing the noise of the low frequency band, but also reduces the size of the overall noise by blocking the noise propagating outside the dryer.

In detail, as shown in FIG. 6, the low frequency band 'A' is annoying to the user's ear, and the peak value of the noise in the 'A' region is greatly reduced.

As shown in the 'B' region, which is a high frequency band, the noise is reduced by about 2 dB over a relatively wide frequency band.

The present invention is not limited to the above-described embodiments, and those skilled in the art can make modifications without departing from the spirit of the present invention, and such modifications are within the scope of the present invention.

According to the clothes dryer according to the present invention described above, the amount of air required for the drying stroke is sufficiently supplied so that the drying performance is not reduced, and noise is reduced by blocking the propagation of the noise generated inside the dryer to the outside.

In particular, most of the noise propagation to the outside is blocked by shielding the suction part closer to the noise source inside the clothes dryer. That is, it is effective to block noise in the low frequency band in the range of 0 to 1000 Hz. In addition, there is an effect of reducing the noise of about 2dB for the overall frequency band of the generated noise.

Claims (4)

delete delete A motor installed inside the clothes dryer, A back cover which forms a rear surface of the clothes dryer and is provided with a seating portion for receiving a hot air supply duct for supplying hot air into the drying drum, and a suction cover for introducing air into one side of the seating portion; A rear supporter coupled to the front of the back cover; In the clothes dryer comprises a plurality of suction portion formed around the rear supporter due to the shape of the seating portion and the rear supporter, the air is introduced into the dryer; And the seating portion is formed in a shape corresponding to the lower edge shape of the rear supporter so that the back cover shields the suction portion closer to the motor of the suction portion to block noise from propagating to the outside. A motor installed inside the clothes dryer, A back cover which forms a rear surface of the clothes dryer and is provided with a seating portion on which a hot air supply duct for supplying hot air into the drying drum is seated, and on one side of the seating portion, an intake louver through which air is introduced; A rear supporter coupled to the front of the back cover; In the clothes dryer comprises a plurality of suction portion formed around the rear supporter due to the shape of the seating portion and the rear supporter, the air is introduced into the dryer; And a lower portion of the rear supporter is formed to correspond to an edge shape of the seating part so that the rear supporter shields a suction part closer to the motor of the suction part to block noise from propagating to the outside.

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