KR101229200B1 - A drum type washing machine and drying duct assembly combined therein - Google Patents

Abstract

The present invention relates to a dry combined drum washing machine and a drying duct assembly mounted thereon, and more particularly, to a drying duct assembly for heating the air flowing into the drum at a high temperature so that the drying duct can be made of a high heat-resistant material so that the drying duct is overheated. It relates to a drying duct assembly and a dry combined drum washing machine equipped with the drying duct assembly to be easily prevented.

Drying duct assembly according to the invention the duct lower; A duct upper covering an upper surface of the duct lower to form an air passage; A reflector seated on the inner circumferential surface of the duct lower at a predetermined interval; A heater provided on the air passage to heat the introduced air; A heater bracket supporting the heater; It includes; a fan assembly provided on one side of the duct lower to suck air.

Since the reflectors constituting the drying duct assembly according to the present invention are mounted at predetermined intervals in the drying duct assembly, the phenomenon in which the duct member is damaged by the high temperature heat generated from the heater is prevented.

Drying Ducts, Drying Fans, Reflectors

Description

Dry drum and washing duct assembly combined therein {A drum type washing machine and drying duct assembly combined therein}

1 is an external perspective view showing a dry combined drum washing machine according to the spirit of the present invention.

Figure 2 is an external perspective view showing a drying duct assembly according to the spirit of the present invention.

3 is an exploded perspective view of the drying duct assembly;

Figure 4 is an external perspective view of the duct lower constituting the drying duct assembly according to the spirit of the present invention.

5 is a cross-sectional view taken along the line II ′ of FIG. 4.

6 is an enlarged view of a portion A of FIG. 5.

7 is a sectional view showing another embodiment of the reflector spacing means.

8 is an enlarged view of a portion B of FIG. 5.

9 is a cross-sectional view showing another embodiment of the lint inflow prevention means.

10 is an external perspective view showing a reflector according to the spirit of the present invention.

FIG. 11 is a cross-sectional view taken along the line II-II ′ of FIG. 2.

12 is an enlarged view of a portion C of FIG. 11.

Figure 13 is another embodiment showing a method of fastening the reflector and the duct lower.

14 is an enlarged view of a portion D in FIG. 11.

<Description of the symbols for the main parts of the drawings>

10: drum washing machine 11: cabinet 12: front cover

13: door 14: drum 15: tub

20: dry duct assembly 21: duct lower 22: duct upper

23: duct connector 24: fan assembly 25: heater

26 heater bracket 27 reflector 28 duct seal

The present invention relates to a dry combined drum washing machine and a drying duct assembly mounted thereto, and more particularly, a drying duct assembly for heating air introduced into a drum at a high temperature can be manufactured from a high heat resistant material, thereby reducing manufacturing costs. It relates to a drying duct assembly and a drying combined drum washing machine equipped with the drying duct assembly to lower and at the same time easily prevent the drying duct from overheating.

In general, a combined drum washing machine is a washing machine provided with a washing function and a drying function for drying laundry after washing.

In detail, the combined-use drum washing machine is an exhaust type drum washing machine, characterized in that the air inside the drum is discharged to the outside during the drying process, and condensation, characterized in that the air inside the drum circulates inside the washing machine without being discharged to the outside. The drum is divided into washing machines. In addition, the condensation-type drum washing machine is provided with a drying duct on an upper side of the tub, and a heater is mounted inside the drying duct to heat the air introduced into the drum to a high temperature. Then, a condensation duct is provided to connect the drying duct and the tub surrounding the drum, so that the air discharged from the drum is changed to a low temperature state. In addition, the air passing through the condensation duct is introduced into the drying duct and is changed to a high temperature dry state, and the process of introducing the air into the drum is repeated.

On the other hand, inside the drying duct is a heater device for generating a high temperature heat, when the power is applied to the heater generates a heat of about 700 degrees, the air inside the drying duct is about 120 degrees Will be maintained.

For this reason, the drying duct is conventionally manufactured through an aluminum die casting process. That is, it is made of a metal material to withstand high temperatures.

However, since the drying duct is manufactured by a die casting method or the like as in the related art, not only the manufacturing cost increases but also the weight of the drum washing machine increases, which causes difficulties in transportation.

Furthermore, the cabinet of the washing machine in which the front and rear surfaces of the drying duct are also supported is required to have a strength enough to withstand the weight of the drying duct, thereby increasing the manufacturing cost of the entire washing machine.

In addition, when the drying duct is manufactured by an aluminum die casting process, since the thickness of the duct becomes thick, there is a disadvantage that the volume of the washing machine is increased or the space inside the duct is narrowed.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a drying duct made of a material which is light in weight and can withstand high temperatures and a dry combined drum washing machine equipped with the drying duct.

It is also an object of the present invention to provide a drying duct in which the manufacturing cost is reduced and the volume ratio inside the duct is increased, and a dry combined drum washing machine equipped with the drying duct.

In addition, the drying duct member is equipped with a heat shield member for preventing the shape deformation or melting due to high temperature heat, and the heat shield member is mounted to be spaced apart in the duct, so that the duct member is damaged by heat It is an object to provide a drying duct assembly that prevents.

Drying duct assembly according to the present invention for achieving the object as described above is a duct lower; A duct upper covering an upper surface of the duct lower to form an air passage; A reflector seated on the inner circumferential surface of the duct lower at a predetermined interval; A heater provided on the air passage to heat the introduced air; A heater bracket supporting the heater; It includes; a fan assembly provided on one side of the duct lower to suck air.

In addition, the combined drying drum washing machine equipped with a drying duct assembly according to the present invention is a drum in which laundry is put; A tub in which the drum is accommodated; A duct lower mounted on one side of the tub to supply hot air into the drum, and formed of a plastic injection molding, a duct upper covering an upper portion of the duct lower, and a spaced apart structure of the duct lower and / or duct upper A drying duct assembly including a reflector seated at a predetermined interval on an inner circumferential surface, a fan assembly for sucking air discharged from the drum, and a heater for heating air sucked by the fan assembly; and connected to the tub And a condensation duct through which the wet steam is discharged from the tub.

By the above configuration, there is an effect that the drying duct mounted inside the washing machine is protected from the risk of shape deformation or fire in a high temperature state.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood, however, that there is no intention to limit the scope of the present invention to the embodiment shown, and that other embodiments falling within the scope of the present invention may be easily devised by adding, Can be proposed.

1 is an external perspective view showing a dry combined drum washing machine according to the spirit of the present invention.

Referring to FIG. 1, the combined-use drum washing machine 10 according to the present invention includes a cabinet 11, a front cover 12 mounted on the front surface of the cabinet 11, and an approximately center portion of the front cover 12. A door 13 rotatably mounted to the tub 13, a tub 15 mounted inside the cabinet 11 to store wash water, and a drum accommodated inside the tub 15 and into which water is introduced. 14) is included.

In addition, the drying combined-use drum washing machine 10 is inserted into the cabinet 11 from the upper one side of the front cover 12, a detergent box 18, detergent and fabric softener and the like, and the detergent box ( 18 is accommodated therein, and includes a dispenser 17 for guiding the flow of the wash water and a water supply valve 16 mounted on the rear surface of the cabinet 11 to supply the wash water. In detail, the water supply valve 16 and the dispenser 17 are connected by a water supply hose.

In addition, the drying combined drum washing machine 10 is mounted on one side of the upper portion of the tub 15, the drying duct assembly 20 for heating the air flowing into the drum 14 at a high temperature during the drying process, and the front cover The control panel 19 is mounted on the front surface of the front panel 12 and includes an input unit for inputting washing conditions and a display unit for displaying a washing process.

In addition, although not shown, it is mounted inside the cabinet 11, and further includes a condensation duct connected at one end to the tub 15 and the other end to the drying duct assembly 20. And, a water supply hose for supplying cooling water is connected to the upper side of the condensation duct, the cooling water is dropped from the upper condensation duct.

Hereinafter will be described the operation of the dry combined drum washing machine according to the present invention constituting the configuration as described above.

First, a user opens the door 13 to inject laundry into the drum 14. Then, the detergent box 18 is pulled in to add detergent and fabric softener. Then, by pressing a button or the like provided on the control panel 19, the washing condition is input and the operation button is pressed. When the operation button is pressed, power is applied to the washing machine 10 to perform washing, rinsing, dehydration, and drying processes according to the input washing conditions.

On the other hand, when the drying process is included in the input condition, when the dehydration process is finished, power is applied to the heater (described later) mounted inside the drying duct assembly 20 and heated. Then, the drum 14 rotates at a low speed so that the laundry is repeatedly raised and dropped. Then, a drying fan (to be described later) mounted in the drying duct assembly 20 operates to suck air in the drum 14. Then, the air in the drum 14 enters the drying duct assembly 20 along the condensation duct and is changed into a high temperature dry state. In addition, the hot and dry air flows into the drum 14 again, absorbs moisture permeating the laundry, and changes to a high temperature and high humidity. In addition, the wet steam in the high temperature and high humidity state is discharged again to the outside of the drum 14 to rise along the condensation duct.

Here, heat is exchanged with the high temperature and high humidity steam which rises while cooling water falls from the upper side of the condensation duct. That is, the high temperature and high humidity steam changes to a low temperature state while passing through the condensation duct, and the moisture contained in the wet steam condenses and flows back into the tub 15. Then, the condensed water introduced into the tub 15 is moved to the drain pump mounted on the bottom surface. And, the wet steam rising along the condensation duct is changed to a low temperature dry state. In addition, the air rising along the condensation duct is introduced into the drying duct assembly 20 to be heated in a high temperature dry state to repeat the circulation process introduced into the drum 14 for a predetermined time.

Figure 2 is an external perspective view showing a drying duct assembly according to the spirit of the present invention, Figure 3 is an exploded perspective view of the drying duct assembly.

2 and 3, the drying duct assembly 20 according to the present invention includes a duct lower 21, a duct upper 22 seated on an upper portion of the duct lower 21, and the duct lower 21. Duct seal 28 seated on the upper edge of the () to prevent air leakage, a fan assembly 24 mounted to one end of the duct lower 21, and the other end of the duct lower 21 A duct connector 23 for connecting the drying duct assembly 20 to the tub 15, a heater 25 mounted inside the drying duct assembly 20 to generate high temperature heat, and the duct lower The reflector (27 of FIG. 6) and the heater 25 mounted inside the 21 and spaced apart from the duct lower 21 by a predetermined distance are fixed in a state spaced apart from the drying duct lower 21 by a predetermined distance. A heater bracket 26 is included to make it possible.

In detail, the fan assembly 24 includes a drying fan 241 for allowing air to flow in the axial direction and discharged in the radial direction, and a fan positioned above the drying fan 241 to rotate the drying fan 241. A motor 244, an air guide 242 for guiding the flow of air sucked by the drying fan 241, and protrudes from the upper surface of the air guide 242 by a predetermined height and diameter to the fan motor ( The motor housing 243 accommodates the 244, and the motor mount 245 is mounted on the upper surface of the motor housing 243 to support the fan motor 244.

In addition, the overheat prevention sensor 29 is mounted on the lateral center portion of the duct lower 21 to prevent the inside of the drying duct assembly 20 from overheating. In addition, the temperature sensor 30 is mounted at one end of the duct lower portion 21, that is, the portion on which the duct connector 23 is mounted, so that the air flowing into the tub 15 is introduced at an appropriate temperature. Detect whether or not. In other words, it functions to maintain a temperature of about 120 degrees by sensing the temperature of the air flowing into the tub 15. The duct seal 28 prevents the leakage of hot air to the outside through a portion where the duct lower 21 and the duct upper 22 contact each other.

In addition, the heater 25 is a terminal portion 251 to which the electric current flows are connected, a heater seal 252 to be mounted at a predetermined distance away from the terminal portion 251 to prevent air leakage, and the terminal portion 251 It consists of a heat generating portion 253 is bent a plurality of times with a predetermined diameter and length. In detail, the heater seal 252 is fitted to the side surfaces of the reflector 27 and the duct lower 21 to prevent air leakage. The heat generator 253 is a sheath heater in which a heating wire is built.

On the other hand, the duct lower 21 and the duct connector 23 is a part which is in contact with the high-temperature air, is injection-molded with a high heat-resistant resin material so that the shape does not deform or fire occurs at high temperatures.

Preferably, a syndiotactic styrene polymer (Syndiotactic Polystrenes: hereinafter referred to as SPS) filed under the application number 10-2003-0075942 in LG Chem can be used as the high heat resistance resin. In detail, the SPS is prepared by uniformly dispersing atactic polystrenes together with styrene monomers to polymerize the catalyst. In addition, the SPS prepared by the manufacturing method as described above has advantages such as low dielectric constant and excellent heat flowability of the conventional styrene-based polymer, and also has heat resistance and chemical resistance due to high transfer regularity.

In addition, the reflector 27 is attached to the inner upper surface of the duct lower 21 along the inner circumferential surface of the duct lower 21. In detail, the reflector 27 is aluminum coated on a metal plate, and is designed to effectively withstand the high temperature heat generated from the heater 25. Therefore, the duct lower 21 is made of SPS material that withstands high temperature well, and the reflector 27 is mounted on the upper surface, so that the shape of the duct lower 21 due to the high temperature heat generated from the heater 25 is obtained. There is an advantage that the risk of deformation is doubled.

Here, the duct upper 22 is also made of SPS material, it is apparent from the contents of the present invention that the heat shield member such as the reflector 27 may be attached to the inner circumferential surface of the duct upper 22. The air guide 242 may also be made of SPS material, but the air guide 242 may be made of a conventional plastic injection molding because it does not receive heat directly from the heater 25. Reveal

On the other hand, the reflector 27 is mounted in a state spaced apart from the upper surface of the duct lower 21 by a predetermined interval. In other words, a thin air layer is formed between the reflector 27 and the duct lower 21 to prevent the heat transferred to the reflector 27 from being directly conducted to the duct lower 21.

In addition, a stepped portion having a predetermined height is formed on an inner circumferential surface of the duct lower 21 at which one end of the reflector 27, that is, the end of the fan assembly 24 is positioned, so that lint and the like flow into the air layer. prevent. Detailed description thereof will be described later with reference to the accompanying drawings.

Hereinafter, the function and operation of the drying duct assembly 20 having the above configuration will be described.

First, when a drying process is started, power is applied to the fan motor 244 to rotate the drying fan 241, and power is applied to the heater 25 to be heated to a high temperature. Then, the air inside the drum 14 is sucked by the drying fan 241. In addition, the sucked air is introduced into the duct and heat-exchanged with the heater 25 to be heated to a high temperature. The air heated to a high temperature is introduced into the tub 15 through the duct connector 23. In addition, the air introduced into the tub 15 evaporates moisture that penetrates the laundry inside the drum 14 to dry the laundry.

Figure 4 is an external perspective view of the duct lower constituting the drying duct assembly according to the spirit of the present invention.

Referring to FIG. 4, the duct lower 21 according to the present invention has a substantially U-shaped cross section.

In detail, the duct lower 21 has a fan seat 211a having a predetermined diameter at one end thereof. In addition, an inlet 211 is formed at a bottom of the fan seat 211a to have a predetermined size so that air is introduced therethrough. In addition, the air duct is formed in the duct lower 21 in a substantially tangential direction of the fan seat 211a. Here, the air flow passage has a shape in which a width is extended from a tangential portion of the fan seat 211a. Therefore, the flow rate of the air discharged to the air flow path is reduced while rotating along the inner circumferential surface of the fan seat 211a, so that the heat exchange time with the heater 25 becomes long.

On the other hand, the side of the duct lower 21 is formed with a heater chamber seating groove 217 for the heater chamber 252 is inserted, and an overheating sensor seating groove 218 for the overheat prevention sensor 29 is inserted. do. The duct seal 28 is seated on the upper edge portion of the duct lower 21. At the other end of the duct lower 21, an outlet 212 for flowing hot air toward the tub 15 is formed. In addition, a temperature sensor hole 219 (see FIG. 5) for mounting the temperature sensor 30 is formed at the side surface of the other end of the duct lower 21.

In addition, a plurality of guide bosses 210 of a predetermined length are formed on the side of the upper edge portion of the duct lower 21 to allow the duct upper 22 to be coupled in position. In addition, a fastening boss 210a extending downward a predetermined length at a position spaced a predetermined distance from the guide boss 210 is formed. In detail, the fastening member is inserted into the fastening boss 210a while the duct upper 22 is seated on the upper surface of the duct lower 21.

In addition, a heater bracket support 213 protruding to a predetermined height is formed at the bottom of the inner circumferential surface of the duct lower 21. In detail, the heater bracket 26 is seated on the heater bracket support 213. The heater 25 is supported by the heater bracket 26. Here, the shape of the heater bracket support 213 will be described in more detail with reference to the accompanying drawings.

In addition, the inner circumferential surface of the duct lower 21 is continuously or discontinuously formed, and a support rib 216 is formed to protrude to a predetermined height so that the reflector 27 is spaced apart from the duct lower 21. In addition, a stepped portion 215 having a predetermined height step downward is formed at a point spaced apart from the fan seat 211a by a predetermined distance. Details of the support rib 216 and the stepped portion 215 will be described later.

By the duct lower 21 having the shape as described above, the air introduced through the inlet 211 is heated to a high temperature by the heater 25, the duct connector 23 through the outlet 212 Flows into. Finally, the tub 15 is introduced into the tub 15.

5 is a cross-sectional view taken along the line II ′ of FIG. 4, and FIG. 6 is an enlarged view of portion A of FIG. 5.

5 and 6, as a reflector separation means for maintaining the reflector 27 spaced apart from the duct lower 21 by a predetermined distance, a predetermined height on the inner bottom surface of the duct lower 21 is shown. A support rib 216 is formed to protrude.

In detail, the support ribs 216 may be continuously formed in a “U” shape extending from one upper end of the reflector 27 to the other end, or a plurality of short ribs 216 may be formed at regular intervals. Furthermore, a plurality of support bosses having a predetermined diameter and height, not rib shapes, may be formed on the inner circumferential surface of the duct lower 21 as the reflector separation means. Of course, the support rib 216 and the support boss is preferably formed integrally during the injection molding process of the duct lower (21).

7 is a cross-sectional view showing another embodiment of the reflector spacing means.

Referring to FIG. 7, at least one forming unit 274 is formed such that the upper surface of the reflector 27 is recessed to a predetermined depth so that the reflector 27 is spaced apart from the duct lower 21. can do.

In detail, the reflector 27 is made of a thin metal sheet by a sheet metal process, and during the manufacturing process, a force is applied to the upper surface of the reflector 27 to be recessed a predetermined depth downward. Then, the end of the forming unit 274 and the duct lower 21 is in line contact, the heat conduction toward the duct lower 21 from the reflector 27 can be minimized.

FIG. 8 is an enlarged view of a portion B of FIG. 5.

Referring to FIG. 8, since the reflector 27 is mounted to be spaced apart from the duct lower 21 by a predetermined distance, a lint which blocks inflow of lint or the like into a gap formed between the reflector 27 and the duct lower 21. Inflow prevention means are required. To this end, in order to prevent the formation of a gap in one end of the reflector 27, in detail, the end of the fan assembly 24, the stepped portion 215 is formed in the duct lower 21.

In more detail, the stepped portion 215 is formed to have a predetermined depth stepped downward from the upper surface of the duct lower 21, and the end of the reflector 27 is in contact with the stepped portion 215, so that the lint It can be prevented from flowing into the gap. In addition, the bottom surface of the reflector 27 and the bottom surface of the duct lower 21 are smoothly connected on the same plane, so that the air sucked by the drying fan 241 flows along the inside of the duct to improve flow resistance. There is also an effect that does not receive.

9 is a cross-sectional view showing another embodiment of the lint inflow preventing means.

Referring to FIG. 9, the lint is prevented from flowing into the gap between the reflector 27 and the duct lower 21, and the end of the reflector 27 is bent or lifted upward to raise the duct lower. Means are provided for preventing failure to form the same plane as the bottom surface of (21).

In detail, an extension portion 215a extending a predetermined length in the horizontal direction is formed at an upper side of the stepped portion 215 shown in FIG. 8. In addition, an end portion of the reflector 27 is inserted into a groove formed under the extension part 215a. As a result, the end portion of the reflector 27 is prevented from being lifted upward by the extension portion 215a or swinging itself.

Here, since the extension part 215a extends in the direction in which the air sucked by the drying fan 241 flows, a flow resistance that prevents the flow of air does not occur.

10 is an external perspective view showing a reflector according to the spirit of the present invention.

Referring to FIG. 10, the reflector 27 according to the present invention is formed by cutting and bending a metal sheet by a sheet metal process as described above. And, the outer circumferential surface is aluminum coated to minimize the occurrence of shape deformation at high temperature. In this case, the duct upper 22 may also be made of the same material as the reflector 27 so that a separate heat shield member such as the extractor 27 may not be mounted inside the duct upper 22. .

In detail, a heater bracket support portion 273 is formed on the bottom surface of the reflector 27 to protrude to a predetermined height, and the heater bracket support portion 273 is formed to rise upward by striking upward from the bottom of the bottom surface.

More specifically, the upper surface of the heater bracket support 273 is formed with a recess 273a recessed to a predetermined depth, and a fastening hole 273b for inserting the fastening member is formed in the center of the recess 273a. . The lower end of the heater bracket 26 is seated on the recess 273a to prevent rocking. Detailed description thereof will be described later with reference to the accompanying drawings.

In addition, the side of the reflector 27 is formed with a heater chamber seating groove 271 in which the heater chamber 252 is seated, and an overheat prevention sensor hole 272 in which the overheat prevention sensor 29 is mounted. One end of the reflector 27 is in contact with the stepped portion 215 of the duct lower 21, and the other end thereof has the same outlet as the end of the duct lower 21. In detail, the other end of the reflector 27 extends along the inner circumferential surface of the duct lower 21 to a portion connected to the duct connector 23. Therefore, the phenomenon in which the duct lower 21 causes a shape deformation or melts in the process of introducing the air heated by the heater 25 into the tub 15 is prevented.

In addition, the overheat prevention sensor hole 272 on the side of the reflector 27 to form a closed curve shape, not a shape that is recessed a predetermined depth from the upper end of the side surface of the reflector 27 like the heater seal seating groove 271 is as follows. For a reason.

In detail, a seal member is wrapped around the outer circumferential surface of the overheat prevention sensor 29, and the seal member is generally made of a rubber material. In addition, when the seal member surrounding the outer circumferential surface of the overheat prevention sensor 29 is damaged by heat, there is a risk that the thermal sensing does not operate normally by covering the sensing surface of the overheat prevention sensor 29. Therefore, in order to maximize the protection of the seal member surrounding the overheat prevention sensor 29 from heat, the overheat prevention sensor hole 272 has a closed curve shape such that only the sensing surface of the overheat prevention sensor 29 is exposed to heat. It is preferable.

FIG. 11 is a cross-sectional view taken along line II-II 'of FIG. 2, and FIG. 12 is an enlarged view of portion C of FIG. 11.

11 and 12, the drying duct assembly 20 according to the present invention includes a lower duct lower 21, a duct upper 22 covered by an upper side of the duct lower 21, and the duct lower A reflector 27 seated on an inner circumferential surface of the 21 and a heater bracket 26 seated on the reflector 27 and supporting a heater (not shown) are included.

In detail, the duct lower 21 has a heater bracket support 213 protruding at a predetermined height from a central portion thereof. In addition, a depression 213a is formed on the upper surface of the heater bracket support 213 to be recessed in a predetermined size and depth, and a predetermined length is extended downward in the center of the depression 213a to fasten the member 40. The fastening boss 213b into which is inserted is formed.

In addition, the reflector 27 also has a heater bracket support 273 in the same shape as the heater bracket support 213 formed in the duct lower 21. A depression 273a is formed at an upper surface of the heater bracket support 273, and a coupling hole 273b is formed at the center of the depression 273a to insert the coupling member 40. The lower end of the heater bracket 26 is seated on the recess 273a.

As mentioned above, the upper portion of the heater bracket 26 is coupled to the heat generating portion 253 of the heater 25. In addition, the lower portion of the heater bracket 26 is seated on the recess 273a so that the heater bracket 26 is removed even when the fastening member 40 is loosely tightened or removed from the fastening boss 213b. Is prevented. That is, upper and lower ends of the heater bracket 26 are fixed by the heater 25 and the heater bracket support 273, respectively.

In addition, the fastening member 40 not only functions to fix the heater bracket 26 to the duct lower 21 and the reflector 27, but also the reflector 27 is fixed to the duct lower 21. It can be seen that it also performs a function.

On the other hand, although not shown, when the duct upper 22 is made of the SPS injection molding, it can be proposed from the spirit of the present invention that the same member as the reflector 27 may be mounted on the inner circumferential surface of the duct upper 22. Reveal

Figure 13 is another embodiment showing a fastening method of the reflector and the duct lower.

Referring to FIG. 13, a fixing protrusion 210b protruding to a predetermined diameter and height is formed on the upper surface of the duct lower 21.

In detail, the fixing protrusion 210b may be integrally formed in the injection molding process of the duct lower 21. In addition, at least one fixing protrusion 210b may be formed. In addition, the fixing protrusion 210b may be formed to be slightly longer than the support rib 216. The reason is explained below.

In more detail, the reflector 27 is seated on the upper surface of the duct lower 21 in which the fixing protrusion 210b is formed as described above. Here, a hole for penetrating the fixing protrusion 210b is formed in the bottom surface of the reflector 27 so that the fixing protrusion 210b is inserted into the hole. When the reflector 27 is seated on the support rib 216, the fixing protrusion 210b protrudes through the reflector 27. In addition, the upper surface of the fixing protrusion 210b is fixed to the bottom surface of the reflector 27 by a heat fusion process of applying heat to the upper surface of the protruding fixing protrusion 210b. Through the above process, the fixing protrusion 210b to perform the function of the fastening member. The upper surface of the fixing protrusion 210b melts and spreads radially, so that the hole for penetrating the fixing protrusion formed in the reflector 27 is completely sealed. Therefore, lint or the like is prevented from penetrating into the space between the reflector 27 and the duct lower 21 through the hole.

FIG. 14 is an enlarged view of a portion D of FIG. 11.

Referring to FIG. 14, the reflector 27 of the present invention has the same shape along the inner circumferential surface of the duct lower 21.

In detail, the side portion of the reflector 27 is formed to be longer than the side portion of the duct lower 21, it characterized in that to protrude from the upper surface of the duct lower (21).

As shown, the side upper end portion of the reflector 27 is formed higher than the upper side end portion of the duct lower 21, so that the duct upper 22 is guided to be mounted in position when the upper side is mounted. In addition, the side end portion of the reflector 27 is elongated so that the duct seal 28 fitted to the upper surface of the duct lower 21 is damaged by the hot air flowing in the drying duct assembly 20. This is avoided. In detail, the duct seal 28 is generally made of a rubber material, which has a disadvantage of being very weak in heat. Therefore, a means is required for the duct seal 28 to be in contact with the hot air to prevent thermal damage, and the above object can be easily achieved by appropriately adjusting the side length of the reflector 27.

By the drying combined drum washing machine and the drying duct assembly mounted thereon according to the present invention constituting the configuration as described above, there is an effect that the weight of the drying duct is significantly reduced.

In addition, the drying duct assembly is made of a plastic injection molded material of a high heat-resistant material, there is an effect that eliminates problems such as deformation of the shape or fire occurs even at high temperatures.

In addition, since the reflector, which is a heat shield member, is firmly mounted in the drying duct assembly, there is an effect of protecting the shape of the duct made of the plastic injection molding or the risk of fire.

In addition, the reflector is mounted to be spaced apart at predetermined intervals in the drying duct assembly, thereby preventing the phenomenon of damaging the duct member by the high temperature heat generated from the heater.

Claims (15)

Duct lower; A duct upper covering an upper surface of the duct lower to form an air passage; A reflector seated on the inner circumferential surface of the duct lower at a predetermined interval; A heater provided on the air passage to heat the introduced air; A heater bracket supporting the heater; And a fan assembly provided on one side of the duct lower to suck air. The method of claim 1, And at least one support rib for allowing the reflector to be seated spaced apart from the duct lower. The method of claim 2, And the support ribs are continuously or discontinuously formed on the inner circumferential surface of the duct lower. The method of claim 1, And at least one support boss to allow the reflector to be seated spaced apart from the duct lower. The method of claim 1, Drying duct assembly, characterized in that a recess is formed in which a portion of the reflector is recessed to a predetermined depth so that the reflector is spaced apart from the duct lower. 6. The method of claim 5, Drying duct assembly, characterized in that the depression is formed by a forming process. The method of claim 1, And at least one of the duct lower and the duct upper is an SPS (SPS, Syndiotactic Polystyrenes) injection molding. The method of claim 1, And said reflector is aluminum coated on its surface. A drum into which laundry is put; A tub in which the drum is accommodated; A condensation duct connected to the tub to discharge wet steam inside the tub; At least one of the duct lower and the duct upper by a spaced apart structure; A drying duct assembly having a reflector seated on one inner circumferential surface, a fan assembly for sucking air discharged from the drum, and a heater for heating air sucked by the fan assembly; Drying drum washing machine included. The method of claim 9, Drying combined drum washing machine further comprises a duct connector coupled to the lower end of the duct lower so that hot air flows into the tub. 11. The method of claim 10, Drying drum washing machine wherein at least one of the duct lower, the duct upper, and the duct connector is formed by injection of SPS (SPS). The method of claim 9, Drying combined drum washing machine, characterized in that the separation structure is a support rib projecting on the upper surface of the duct lower. The method of claim 9, The spacing structure is a combined drum washing machine, characterized in that the support boss projecting on the upper surface of the duct lower. The method of claim 9, The separation structure is a dry combined drum washing machine, characterized in that a portion of the reflector is recessed downward by the forming method to contact the duct lower. The method of claim 9, Drying drum washing machine wherein at least one of the reflector and the duct upper is aluminum coated on a metal member.

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