KR20080071425A - Washing-drying machine - Google Patents

Abstract

A washing/drying machine is provided to reduce drying time without increasing condensate consumption by installing a condensing duct and a water injecting unit to inject water into an outer tub. A washing/drying machine comprises a cabinet(110), an outer tub(120), a rotary tub(150), and a water injecting unit. The outer tub is installed in the cabinet. The rotary tub rotates in the outer tub. The water injecting unit sprays water into the outer tub.

Description

Laundry Dryer {WASHING-DRYING MACHINE}

1 is a cross-sectional view of a conventional condensation type laundry dryer,

2 is a cross-sectional view of the laundry dryer according to the first embodiment of the present invention;

3 is a cross-sectional view taken along line III-III of FIG. 2;

4 is an enlarged view of the plunger driver region of FIG. 3;

5 is a cross-sectional view of a laundry dryer according to a second embodiment of the present invention;

6 is a cross-sectional view of a laundry dryer according to a third embodiment of the present invention;

FIG. 7 is a perspective view of an installation state of the first water spray unit and the second water spray unit of FIG. 6;

8 is a cross-sectional view taken along the line VII-VII of FIG. 6;

9 is a perspective view of FIG. 8.

Explanation of symbols on the main parts of the drawings

110: cabinet 120: outer tank

150: rotating tank 161: circulating duct

163: circulation fan 165: heater

170: water spray unit 171: Venturi tube

175: water supply pipe 177: plunger

181: plunger drive unit 201: water storage tank

203: water supply pipe 205: on-off valve

210: injection nozzle

The present invention relates to a laundry dryer, and more particularly, to a laundry dryer in which the amount of condensed water can be reduced and the drying time can be shortened.

1 is a cross-sectional view of a conventional condensation type laundry dryer. As shown, the condensation type laundry dryer, the cabinet 11 to form a receiving space therein, the outer tank 21 accommodated in the cabinet 11, and rotatable inside the outer tank 21 Rotating tank 31 is installed so as to, the condensation duct 41 formed on the outside of the outer tank 21 so that the air containing moisture extracted from the outer tank 21 can be condensed, along the flow direction of the air A heating duct 51 connected to a downstream side of the condensation duct 41 and heating air to provide the inside of the outer tub 21, and the air of the outer tub 21 is connected to the condensation duct 41 and the heating duct. The circulation fan 53 which is circulated along the 51 is provided.

An opening 12 is formed at one side of the cabinet 11 to allow laundry to enter and exit, and a door 14 is provided at one edge of the opening 12 to open and close the opening 12. .

Inside the cabinet 11, a cylindrical outer tub 21 having one side open to accommodate washing water is disposed. Upper and lower sides of the outer tub 21 are provided with a spring 23 and a damper 24 to support the outer tub 21, respectively.

A drainage passage 25 having a drain pump 26 is formed in the lower region of the outer tub 21, and a driving motor 27 is provided at one side of the outer tub 21 so as to rotationally drive the rotary tub 31. Is provided. The inner side of the outer tub 21 is rotatably coupled to the rotating tub 31 of the cylindrical shape one side is open. The circumferential surface of the rotating tub 31 is formed with a plurality of through holes 32 penetrating the plate surface. A plurality of lifts 33 are provided in the rotary tub 31 to be spaced apart from each other along the circumferential direction so as to move the laundry upward.

On the other hand, a condensation duct 41 is coupled to the rear of the outer tank 21 so as to condense the internal air to the outside, and condensation water (hereinafter, condensed water) into the upper region of the condensation duct 41. Condensed water supply pipe 43 is installed to supply. The condensate water supply pipe 43 is provided with an opening and closing valve 44 to open and close the flow path of the condensate. One end of the condensation duct 41 is connected to the other end of the heating duct 51 connected to the front region of the outer tub 21. A circulation fan 53 is installed at one side of the heating duct 51 to circulate the air in the outer tub 21. A downstream side of the circulation fan 53 is provided with a heater 55 to heat the air.

By the way, in such a conventional condensation type laundry dryer, the condensed water is dropped inside the relatively narrow condensation duct 41, so that the condensed water is not sufficiently heat exchanged with the air containing the moisture and the outer tank Since it is discharged to the outside of (21), there is a problem that not only the amount of condensed water is used but also the drying time is extended.

Accordingly, an object of the present invention is to provide a laundry dryer that can shorten the drying time.

Another object of the present invention is to provide a laundry dryer that can reduce the amount of condensate used.

The present invention, in order to achieve the object as described above; An outer tub installed inside the cabinet; A rotating tub rotatably installed in the outer tub; It provides a laundry dryer including a water spray unit for spraying water to the inner surface of the outer tank.

The apparatus may further include a circulation duct allowing air drawn out from the rear region of the outer tub to flow back into the front region of the outer tub, wherein the water spray unit is configured to spray water on the inner surface of the rear end of the outer tub. .

The water injection unit is effective to include a plurality of injection nozzles spaced apart from each other.

And a circulation duct for introducing air drawn out from the rear region of the outer tub back into the front region of the outer tub, wherein the water spray unit includes a first nozzle for spraying water onto an inner surface of the rear end of the outer tub; It is preferable to include a second nozzle for spraying water on the inner surface of the.

Here, the second nozzle is effectively arranged to spray water in a direction away from the suction port side of the circulation duct.

The water spraying unit may further include a venturi tube having a reduced flow cross-sectional area, a water supply pipe disposed at the discharge side of the venturi tube, and a water supply pipe disposed in the venturi tube reciprocally to discharge air to discharge the air. It is preferable to include a plunger for allowing water to be injected together with the air, and a plunger driver for driving the plunger.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

2 is a cross-sectional view of the laundry dryer according to the first embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2, and FIG. 4 is an enlarged view of the plunger driving portion region of FIG. 3. As shown in FIG. 2, the laundry dryer includes a cabinet 110 forming an accommodation space therein, an outer tub 120 installed inside the cabinet 110, and an inner tub 120. Rotating tank 150 is rotatably accommodated and comprises a water injection unit 170 for spraying the water to the inside of the outer tank 120 to be diffused.

An opening 112 is formed at one side of the cabinet 110 to allow laundry to enter and exit, and a door 114 is coupled at one side of the opening 112 to open and close the opening 112. Inside the cabinet 110, an outer tub 120 having a tubular shape of which one side is open is installed to be buffered by a spring 122 and a damper 124. At the bottom of the outer tub 120, a drain passage 125 having a drain pump 127 is formed. The rear end of the outer tub 120 is provided with a drive motor 128 for the rotating tub 150.

The duct connecting portion 132 is formed to protrude upward in the rear upper region of the outer tub 120 so that the inflow side of the circulation duct 161 connected to the front upper region of the outer tub 120 can be connected to each other. . Here, the duct connecting portion 132 protrudes upward at a point spaced to one side with respect to the center line L _VC along the up and down direction of the outer tub 120 so as to prevent a collision with the cabinet 110, and the outer tub 120 during the plane projection. It is formed so as not to protrude toward the rear side of the cabinet 110 compared to the rear end of the). In the upstream side of the circulation duct 161 along the flow direction of the air, a circulation fan 163 is rotatably installed to circulate the air, and a downstream side of the circulation fan 163 to heat the heater ( 165 is disposed.

A plurality of through holes 153 are formed on the circumferential surface of the rotating tub 150 to allow the inside and the outside to communicate with each other, and a plurality of lifts are formed on the inner surface of the rotating tub 150 to move the laundry upward. 154 is provided.

On the inner surface of the rear end of the outer tub 120, a plurality of first ribs 133 are formed to extend in a radial direction, and a plurality of second ribs 134 are formed to extend in a predetermined length along the circumferential direction, respectively. Formed.

On the other hand, the injection nozzle 210 is installed in the rear region of the outer tub 120 to spray water to the inner surface of the rear end of the outer tub 120. The spray nozzle 210 is formed to spray water so that water can be contacted in a large area on the inner surface of the outer tub 120 so that the heat exchange area can be increased. In addition, the injection nozzle 210 in a direction away from the duct connecting portion 132 at a position spaced a predetermined distance from the duct connecting portion 132 so that water injected by the suction force of the circulation fan 163 is not sucked. It is installed to be sprayed. In addition, the spray nozzle 210 is formed so that the water droplets can be sprayed in the form of fine droplets or water mist in consideration of reducing the amount of water used and increasing the total surface area of the sprayed water droplets. It is.

The water injection unit 170, the venturi tube 171 is formed to reduce the flow cross-sectional area, the water supply pipe 175 disposed on the discharge side of the venturi tube 171, and the inside of the venturi tube 171 A plunger 177 which is reciprocally inserted into and discharges air through the water supply pipe 175, a plunger driver 181 reciprocatingly driving the plunger 177, and the water supply pipe 175 is connected to the water storage tank 201 for storing water therein, and the injection nozzle connected to the venturi tube 171 and the water flowing with the air to the inside of the outer tank 120 ( 210 is configured to include.

The venturi tube 171 is a variable diameter portion formed to gradually reduce the diameter between the large-diameter portion 172a and the small-diameter portion 172b and the large-diameter portion 172a and the small-diameter portion 172b having different diameters. 172c is provided. The other end of the water supply pipe 175 connected to the water storage tank 201 is connected to the small diameter portion 172b. One side of the reservoir tank 201 is connected to the water supply pipe 203, the water supply pipe 203 is provided with an on-off valve 205.

The plunger 177 is reciprocally provided inside the large diameter portion 172a. A plurality of through holes 178 are formed in the plunger 177 to allow air to pass therethrough, and each through hole 178 is provided with a valve 179 to open and close them. One side of the venturi tube 171 is provided with a plunger driver 181 to reciprocate the plunger 177.

The plunger driver 181 may include a bobbin 183, an excitation coil 185 wound around the bobbin 183, a yoke 187 forming a gyro around the bobbin 183, and A fixed core 189 fixed to the inside of the bobbin 183, a movable core 191 disposed to be approached and spaced apart from the fixed core 189, and one end of the fixed core 189 connected to the movable core 191. The stage includes a rod 193 connected to the plunger 177 and a return spring 195 for applying an elastic force spaced apart from each other between the movable core 191 and the fixed core 189.

By such a configuration, when the laundry is to be dried, the circulation fan 163 is driven to circulate the air inside the outer tub 120, and the heater may be heated. 165 is operated. The air heated by the heater 165 flows into the inside of the rotating tub 150 and comes into contact with the laundry to contain moisture of the laundry, and thus the rotating tub (153) through the through hole 153 of the rotating tub 150. Out of 150).

On the other hand, when power is applied to the excitation coil 185 of the plunger driver 181, the movable core 191 moves in a direction approaching the fixed core 189 by a magnetic force. Accordingly, the plunger 177 pressurizes the internal air while moving toward the variable diameter portion 172c of the venturi tube 171, and the pressurized air increases in speed while passing through the variable diameter portion 172c, thereby reducing the small diameter portion. It is moved to 172b. At this time, the pressure of the inside of the small diameter portion 172b decreases due to the increase in speed, and the water of the water storage tank 201 flows into the small diameter portion 172b through the water supply pipe 175. The introduced water flows with the air moving at a high speed, and is injected to the inner surface of the rear end of the outer tub 120 through the injection nozzle 210. The injected water cools the inner surface of the outer tub 120 and contains moisture to contact with the air leaked to the outside of the rotary tub 150 to exchange heat to condense moisture in the air. At this time, the first rib 133 and the second rib 134 formed on the inner surface of the rear end of the outer tub 120 not only delays the sprayed water falling but also widens the surface area to promote heat exchange efficiency.

5 is a cross-sectional view of the laundry dryer according to the second embodiment of the present invention. The same and equivalent parts as those described above and shown in the drawings will be omitted for convenience of description of the drawings and will be described with reference to the same reference numerals. As shown in FIG. 5, the laundry dryer includes a cabinet 110 forming an accommodation space therein, an outer tub 120 installed inside the cabinet 110, and an inner tub 120. Rotating tank 150 is rotatably accommodated and comprises a water injection unit 170 for spraying the water to the inside of the outer tank 120 to be diffused.

An opening 112 and a door 114 are provided on the front surface of the cabinet 110, and the outer tub 120 is supported by a spring 122 and a damper 124 inside the cabinet 110. .

The rear end of the outer tub 120 is provided with a drive motor 128 for rotating the rotary tub 150, the bottom of the outer tub 120, the drain passage 125 having a drain pump 127 is provided Formed.

A condensation duct 220 is coupled to a rear surface of the outer tub 120 to draw condensed air to the outside, and a condensate supply pipe to supply condensed water to an upper region of the condensation duct 220. 223 is installed. The condensate water supply pipe 223 is provided with an on-off valve 225 to open and close the flow path of the condensate. One end of the condensation duct 220 is connected to the other end of the heating duct 240 connected to the front region of the outer tub 120 so as to communicate with each other. The circulation fan 231 is installed to circulate the air inside the 120. The downstream side of the circulation fan 231 is provided with a heater 241 to heat the air.

On the other hand, in the rear end region of the outer tub 120 is provided with a water injection unit 170 having a spray nozzle 215 to spray water on the inner surface of the rear end of the outer tub 120. Here, the specific configuration of the water spraying unit 170 is substantially the same as the above-mentioned, so it will be omitted.

By such a configuration, when the laundry is to be dried, the air is drawn out of the rotating tank 150 by the circulation fan 231, and some of the extracted air is transferred to the condensation duct 220. Along the upward flow. At this time, the condensation water supplied through the condensation water supply pipe 223 falls inside the condensation duct 220 and exchanges heat with air drawn from the outer tank 120. The air from which moisture is removed while passing through the condensation duct 220 is heated by the heater 241 to be re-introduced into the inside of the rotating tank 150.

On the other hand, the water spray unit 170 by injecting water toward the inner surface of the rear end of the outer tub 120 contains the moisture of the laundry in the inside of the rotary tub 150, the air drawn out to the outer tub 120 Direct contact with the inner surface of the rear end of the and / or the sprayed water causes condensation to remove moisture.

6 is a cross-sectional view of a laundry dryer according to a third embodiment of the present invention, FIG. 7 is a perspective view of an installation state of the first water spray unit and the second water spray unit of FIG. 6, and FIG. 8 is a line VII-VII of FIG. 6. 9 is a perspective view of FIG. 8. As shown in these drawings, the laundry dryer includes a cabinet 110 forming an accommodation space therein, an outer tub 120 installed inside the cabinet 110, and an inside of the outer tub 120. The rotating tank 150 is rotatably accommodated, and includes a first water spraying unit 250 and a second water spraying unit 260 for spraying water to be diffused into the outer tank 120.

An opening 112 and a door 114 are provided on the front surface of the cabinet 110, and the outer tub 120 is supported by a spring 122 and a damper 124 inside the cabinet 110. . The rear end 121b of the outer tub 120 is provided with a drive motor 128 for rotating the rotary tub 150, and a drain passage having a drain pump 127 at the bottom of the tub 120. 125) is formed.

The outer tub 120 has a cylindrical portion 121a and a rear end 121b formed to block the rear of the cylindrical portion 121a. The duct connecting portion 132 is formed to protrude upward from the rear upper region of the cylindrical portion 121a. One end of the circulation duct 161 is connected to the duct connecting portion 132. The other end of the circulation duct 161 is connected to the front upper region of the outer tub 120. The circulation fan 163 is rotatably installed in the circulation duct 161 so as to circulate the air, and a heater 165 is disposed at the downstream side of the circulation fan 163 to heat the air. have.

A plurality of through holes 153 are formed on the circumferential surface of the rotating tub 150 to allow the inside and the outside to communicate with each other, and a plurality of lifts are formed on the inner surface of the rotating tub 150 to move the laundry upward. 154 is provided.

Meanwhile, as illustrated in FIGS. 7 to 9, a first water spraying unit having a first nozzle 255 in the rear region of the outer tub 120 to spray water onto the inner surface of the outer tub 120, respectively. A water spraying unit composed of 250 and a second water spraying unit 260 having a second nozzle 265 is provided. Here, since the first water spraying unit 250 and the second water spraying unit 260 are substantially the same configuration as the water spraying unit described above, a detailed description thereof will be omitted.

The first nozzle 255 is installed to spray water on the inner surface of the rear end 121b of the outer tub 120, the second nozzle 265 is mainly the cylindrical portion of the outer tub 120 ( It is installed to spray water on the inner surface of 121a). Here, the first nozzle 255 and the second nozzle 265 are both formed in such a way that the water is in contact with the inner surface of the outer tank 120 in a large area so that the water can be sprayed so that the heat exchange area is increased. do. In addition, the first nozzle 255 and the second nozzle 265 are spaced apart from the duct connecting portion 132 by a predetermined distance so that the water injected by the suction force of the circulation fan 163 is separated from the duct. It is installed to be sprayed in a direction away from the connecting portion 132. In addition, the first nozzle 255 and the second nozzle 265 reduce water consumption and increase the total surface area of the sprayed water droplets. To be sprayed in the form of.

By such a configuration, when the laundry is to be dried, the circulation fan 163 is driven to circulate the air inside the outer tub 120, and the heater may be heated. 165 is operated. The air heated by the heater 165 flows into the inside of the rotating tub 150 and comes into contact with the laundry to contain moisture of the laundry, and thus the rotating tub (153) through the through hole 153 of the rotating tub 150. Out of 150).

On the other hand, when power is applied to the excitation coil 185 of each of the plunger driving unit 181 of the first water injection unit 250 and the second water injection unit 260, the movable core 191 is the fixed core ( 189) is moved in the direction approaching. Accordingly, the plunger 177 pressurizes the internal air while moving toward the variable diameter portion 172c of the venturi tube 171, and the pressurized air increases in speed while passing through the variable diameter portion 172c, thereby reducing the small diameter portion. It is moved to 172b. At this time, the inside of the small diameter portion 172b is reduced in pressure by increasing the speed of the water in the water storage tank 201 flows through the water supply pipe 175. Water introduced into the small diameter portion 172b flows with the air moving at a high speed.

That is, the flowed water that flows with the air in the venturi tube 171 of the first water spraying unit 250 is sprayed on the inner surface of the rear end 121b of the outer tub 120 through the first nozzle 255. . The sprayed water cools the inner surface of the outer tub 120 and contains moisture to directly contact the air leaked to the outside of the rotary tub 150 to heat exchange to condense moisture in the air.

At the same time, water flowing together with air in the venturi tube 171 of the second water spraying unit 260 is sprayed on the inner surface of the cylindrical portion 121a of the outer tub 120 through the second nozzle 265. The injected water cools the inner surface of the cylindrical portion 121a of the outer tub 120 and is in direct contact with the air flowing out of the rotating tub 150 to condense and remove moisture in the air.

As described above, according to the present invention, there is provided a laundry dryer that can reduce the amount of condensed water used by spraying water to the inner surface of the outer tank.

In addition, according to the present invention, by providing a condensation duct in which the air containing moisture extracted from the rotating tank is condensed, and a water injection unit for injecting water on the inner surface of the outer tank to provide a drying time without significantly increasing the amount of condensed water There is provided a laundry dryer that can significantly shorten.

Claims (6)

Cabinets; An outer tub installed inside the cabinet; A rotating tub rotatably installed in the outer tub; Washing dryer comprising a water spray unit for spraying the water to the inner surface of the outer tank. The method of claim 1, And a circulation duct allowing air drawn out from the rear region of the outer tub to flow back into the front region of the outer tub, wherein the water spray unit sprays water onto the inner surface of the rear end of the outer tub. The method of claim 2, The water spray unit laundry dryer, characterized in that it comprises a plurality of injection nozzles spaced apart from each other. The method of claim 1, And a circulation duct for introducing air drawn out from the rear region of the outer tub back into the front region of the outer tub, wherein the water spray unit includes a first nozzle for spraying water onto an inner surface of the rear end of the outer tub; Washing dryer comprising a second nozzle for spraying water on the inner surface of the cylindrical portion. The method of claim 4, wherein And the second nozzle is arranged to spray water in a direction away from the suction port side of the circulation duct. The method according to any one of claims 1 to 5, The water injection unit includes a venturi tube having a reduced flow cross-sectional area, a water supply pipe disposed at the discharge side of the venturi tube, and a water reciprocally inserted into the venturi tube to discharge water to discharge water through the water supply pipe. And a plunger to be injected together with the air, and a plunger driving unit for driving the plunger.

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