CN102286873A - Air inlet connection pipeline capable of preventing water from flowing backward for washing and drying integrated machine - Google Patents

Air inlet connection pipeline capable of preventing water from flowing backward for washing and drying integrated machine Download PDF

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Publication number
CN102286873A
CN102286873A CN2011102205958A CN201110220595A CN102286873A CN 102286873 A CN102286873 A CN 102286873A CN 2011102205958 A CN2011102205958 A CN 2011102205958A CN 201110220595 A CN201110220595 A CN 201110220595A CN 102286873 A CN102286873 A CN 102286873A
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CN
China
Prior art keywords
air
air intake
line
wind
washing
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CN2011102205958A
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Chinese (zh)
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CN102286873B (en
Inventor
汪旭永
迟宗锐
宋华诚
候永顺
宁骁
肖磊
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Qingdao Haier Drum Washing Machine Co Ltd
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Haier Group Corp
Qingdao Haier Drum Washing Machine Co Ltd
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Priority to CN201110220595.8A priority Critical patent/CN102286873B/en
Publication of CN102286873A publication Critical patent/CN102286873A/en
Application granted granted Critical
Publication of CN102286873B publication Critical patent/CN102286873B/en
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Abstract

The invention discloses an air inlet connection pipeline capable of preventing water from flowing backward for a washing and drying integrated machine. The air inlet connection pipeline is arranged on the rear part of an outer cylinder of the washing and drying integrated machine; the rear part of the outer cylinder is provided with a drying air inlet; an air inlet connection pipeline air outlet is correspondingly connected with the drying air inlet; and the air inlet connection pipeline is provided with a group of air guide grooves for changing air directions and/or stopping ribs through which bubbles enter the air inlet connection pipeline from the air outlet of the air inlet connection pipeline. The air guide grooves comprise a first air guide groove which is protruded near the outer cylinder in the air inlet connection pipeline and a second air guide groove which is protruded toward the reverse direction of the drying air inlet corresponding to the air outlet of the air inlet connection pipeline; and inlet air rises and then falls down along an air inlet direction by matching the first air guide groove and the second air guide groove and then is guided toward the air outlet of the air inlet connection pipeline. The improved structure of the air inlet connection pipeline has the characteristics of simple structure, and low cost, and the service life of the washing and drying integrated machine with a drying function is relatively prolonged.

Description

A kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine
Technical field
The present invention relates to a kind of clothes washer-dryer, especially a kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine.
Background technology
At the drier that is used for the clothing clothes washer-dryer, the device that generation adds hot-air adopts the mode of heating that adds hot-air by heater, the general heater strip or heating tube or heat pump of adopting is as thermal source, be provided with following air circulation duct in the existing heat-pump-type clothes drying device: the hot-air that adds that was carried out heating by the condenser in the heat pump circulating system is admitted in the hothouse that clothing is housed, the moisture absorption air of having captured moisture from clothing is sent back to evaporimeter and dehumidifies, air after the dehumidifying is heated by condenser once more, and sends in the hothouse.
The air inlet operated by rotary motion of clothes washer-dryer is at the urceolus rear portion, and during washing, the foam or the water capacity easily enter the air intake pipeline by the rear portion air inlet, and further adverse current arrives heater or heat pump, and then influences the life-span of drying system, even brings potential safety hazard.
As application number is that the Chinese patent of 200820041966.X discloses a kind of clothes washer-dryer that utilizes the heat pump oven dry, the heat pump of being made up of parts such as evaporimeter, condenser, compressor, capillaries is installed at outer barrel bottom, heat pump is connected with the air-out air channel by wind inlet channel with outer bucket, there is air inlet Tong the back lower place outside, and there is air outlet the front upper place.Said structure adopts air inlet to be located at the back lower place of outer bucket, and easier foam or the water of causing enters air inlet.
In order to prevent that foam or water adverse current from arriving in the air intake pipeline, improvement has been made in the installation of air intake pipeline, the shape of air intake pipeline is walked around the top of urceolus and then is continued descending along the edge at urceolus rear portion.But can occur a problem like this, cause the hot blast skewness that blows in the inner core easily, drying effect is bad.
In view of this special proposition the present invention.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provide a kind of simple in structure, utilize self structure to prevent water and/or the foam into air intake connecting line of drying pipeline that flows backwards.
For solving the problems of the technologies described above, the present invention adopts the basic design of technical scheme to be: a kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine, be installed on the rear portion of washing-drying integral machine urceolus, the urceolus rear portion is provided with the oven dry air inlet, air intake connecting line air outlet and oven dry air inlet corresponding connection, described air intake connecting line are provided with the wind-guiding groove of one group of change wind direction and anti-sealing and/or foam are entered air intake connecting line inside by air intake connecting line air outlet the muscle that stops.
Described wind-guiding groove comprises that one protrudes the second wind-guiding groove that form to first a wind-guiding groove that protrude to form near the urceolus direction and a corresponding air intake connecting line air outlet to oven dry air inlet opposite direction in air intake connecting line inside, the cooperation of air intake by the first wind-guiding groove and the second wind-guiding groove with the air intake direction raise earlier afterwards fall after again towards air intake connecting line air outlet wind-guiding.
Wind path to the second wind-guiding groove in the air intake connecting line is the structure of dwindling, and circulation area is to increase air-out speed in the minimizing unit.
Described air intake connecting line be one along the urceolus rear portion one lateral edges radian is bent upwards pipeline structure to topmost, air intake connecting line air outlet is below topmost, direction is towards the oven dry air inlet at urceolus rear portion, and the described muscle that stops is located in the described air outlet.
The limit wall of the corresponding described air outlet direction of the described second wind-guiding groove is a slope, and is gradually low to described air outlet direction by the second wind-guiding bottom portion of groove.
Corresponding air outlet direction is provided with the flow distribution plate that wind is divided at least two bursts of air-out on the described slope, and the chamber that the madial wall of flow distribution plate and pipeline forms can make air-out form eddy current earlier to increase air-out speed.
Described oven dry air inlet by after the setting that turns forward, satisfy: the center line of oven dry air inlet extends to that nozzle passes through inner core center and inner core forward flange lower limb successively in the washing-drying integral machine.
Described oven dry air inlet is located at urceolus rear portion top, the air intake direction by after slope down to inner core forward flange lower limb forward.
The slope of the described second wind-guiding groove and oven dry air inlet incline structure corresponding coupling are to increase intake velocity.
The described muscle that stops is horizontal " fore-telling " font structure, comprise diagonal bar and horizontal bar, be located at described air outlet near position by air-out direction in the pipeline, the end of horizontal bar and diagonal bar is fixed on the air outlet side wall, corresponding air outlet one side of horizontal bar cooperates block water and/or foam, an opposite side wind-guiding with diagonal bar.
The air outlet of described air intake connecting line is a frame structure, is provided with reinforcement in the framework.
Described air intake connecting line is the pipeline structure of one for forward and backward two parts are deposited by hot plate, perhaps, and for two parts tighten together by the hermetically-sealed construction screw.
Because the air intake connecting line need be installed in the urceolus rear portion, therefore the gabarit and the urceolus rear portion circumference of air intake connecting line are complementary, the air intake direction arrives top after circumferential go up from the bottom along urceolus, change direction, wind direction is changed wind direction again for being blown into from back to front in the oven dry air inlet downwards by the first wind-guiding groove and the second wind-guiding groove.
Air intake connecting line one end of the present invention is connected with urceolus oven dry air inlet, and the other end is connected with the air channel, and described air channel is connected with the heat pump air outlet, perhaps is connected with the wind inlet channel by the heater strip heating in the air channel of prior art.Heat pump of the present invention is a modular structure, oven dry circulation wind path is: under the drive of breeze fan, moist hot gas is upwards discharged from urceolus is anterior, filter through double-deck thread bits filtering device backward, enter the heat pump module of washing machine bottom downwards, through evaporimeter humid air is condensed into water earlier, condensation flow is in the ponding dish of bottom, be discharged to outside the washing machine by draining pump again, after the drying, pass through condenser again, the heat that sheds by condenser heats gas, by the breeze fan sucking-off that runs up.High-temperature gas after the heating upwards, rush in urceolus inside from the air intake connecting line at urceolus rear portion, there is inner core urceolus inside, high-temperature gas is entered in the inner core by the air-vent at inner core rear portion, and the wet clothes in the inner core is carried out heating, drying, and a lot of air-vents are arranged on the cylindrical shell of inner core, along with running up of breeze fan, after moisture in the inner core passed from the hole on the inner barrel, sucking-off was gone before the urceolus, upwards discharged by urceolus is anterior again.
After adopting technique scheme, the present invention compared with prior art has following beneficial effect.
The present invention is by changing the structure of washing-drying integral machine air intake connecting line, can block water when making washing and/or foam enter in the clothes drying structure, and then avoid influencing the drying system; Two wind-guiding grooves that pass through in the air intake process to increase are to change wind direction and to increase wind speed; Because the air intake direction is to change downwards at top, can prevent that the water and/or the foam that spill from flowing in the heater along the air intake pipeline; Further, be provided with at the air outlet of air intake connecting line and stop that muscle blocks the water and/or the foam stream that spill in the urceolus and gets back in the pipeline, make it can flow back in the urceolus; The corresponding air outlet of the further again second wind-guiding groove is provided with the slope, and water and/or the foam stream both being convenient to spill in the urceolus are got back in the tube, and the air intake direction of also being convenient to air-out direction and urceolus oven dry air inlet cooperates; In addition, the chamber of the madial wall of flow distribution plate on the slope and pipeline formation can make air-out form eddy current earlier to increase air-out speed; Wind path to the second wind-guiding groove in the pipeline is the structure of dwindling, and further increases air-out speed.The oven dry air inlet inclined design at urceolus rear portion has prolonged the route of hot blast in inner core, has also increased the area and the time of hot blast and clothing heat exchange relatively, has improved drying efficient.The present invention above-mentioned improved simple in structure, cost is low, has prolonged the service life of washing-drying integral machine clothes drying function relatively.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Description of drawings
Fig. 1 is the drying circulation wind path schematic diagram that air intake connecting line of the present invention is located at washing-drying integral machine;
Fig. 2 is an air intake tube connector air intake schematic diagram of the present invention;
Fig. 3 is an air intake tube connector structural representation of the present invention;
Fig. 4, the 5th, the described air intake tube connector of Fig. 3 section is at the schematic diagram of both direction.
The specific embodiment
The air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine of the present invention can be used for the washing-drying integral machine of heat pump drying, also can be used for being provided with in the air channel washing-drying integral machine of electrical heating wire drying.Because it is lower and damage clothing easily that the electrical heating wire security is set in the air channel, therefore present this drying mode is less, washing-drying integral machine described in the embodiment of the invention adopts the heat pump drying, but does not influence the washing-drying integral machine that air intake connecting line of the present invention is used for being provided with in the air channel electrical heating wire drying.
As shown in Figure 1, described air intake connecting line 1 one ends are connected with the oven dry air inlet 2 of urceolus, the other end is connected with air channel 3, air channel 3 is connected with heat pump air outlet 4, heat pump comprises compressor 5, condenser 6, throttling arrangement and evaporimeter 7, by the cold-producing medium circulating line successively with compressor 5, condenser 6, throttling arrangement, evaporimeter 7 connects to form the circulatory system to compressor 5 again, heat pump is by last, lower cover integrates modular structure, be provided with wind deflector successively between heat pump air inlet 8 and the heat pump air outlet 4, evaporimeter 7, condenser 6 and breeze fan form the heating wind path, described evaporimeter 7 tops are provided with the water spray box 9 corresponding with evaporimeter, and the evaporimeter bottom is provided with the ponding dish.Water spray box top is provided with water inlet, water spray box bottom is provided with a plurality of water sprayering holes, the water spray box inside of water inlet correspondence be provided with one disperse current with increase the watering uniformity branch water slug inclined-plane, the water of water inlet enters in the water spray box and impacts with dividing the generation of water slug inclined-plane, The water splash in all directions in space on every side, spilt by water sprayering hole, effect is even.
Being parallel to the evaporimeter 7 of fin and condenser 6 two ends is respectively equipped with side plate evaporimeter and condenser is fixed as one, and biside plate cooperates with upper and lower cover plate forms one section wind path, humid air passes cool-down dehumidification behind the gap between the fin in twos of evaporimeter, and that passes condenser again is heated to be dry hot-air in twos between the fin.So that air intake is by being staggered to form turbulent flow during the space between the fin, difference is 0.1-0.5mm to the spacing of fin of evaporimeter 7 greater than the spacing of fin of condenser 6.
Oven dry circulation wind path is: under the drive of breeze fan, moist hot gas is from urceolus 10 anterior upwards discharges, filter through double-deck thread bits filtering device 11 backward, enter the heat pump module of washing machine bottom downwards, earlier humid air is condensed into water through evaporimeter 7, condensation flow is in the ponding dish of bottom, be discharged to outside the washing machine by draining pump again, after the drying, pass through condenser 6 again, the heat that sheds by condenser 6 is with air heat, by the breeze fan sucking-off that runs up, the high-temperature gas after the heating is upwards rushed in urceolus 10 inside from the air intake connecting line 1 at urceolus 10 rear portions, there is inner core 12 urceolus 10 inside, high-temperature gas is entered in the inner core 12 by the air-vent at inner core rear portion, and the wet clothes in the inner core 12 is carried out heating, drying, and a lot of air-vents are arranged on the cylindrical shell of inner core, along with running up of breeze fan, after moisture in the inner core passed from the hole on the inner barrel, sucking-off was gone before the urceolus, upwards discharged by urceolus is anterior again, finish primary drying, continue the circulation drying.
As shown in Figure 2, described oven dry air inlet 2 is located at top, urceolus 10 rear portions, by after forward (by the outside to inside) be obliquely installed, satisfy: the center line K of oven dry air inlet extends to 12 mouthfuls of washing-drying integral machine inner cores and passes through inner core 12 center O and inner core forward flange 120 lower limbs successively, promptly the air intake direction by after slope down to inner core forward flange lower limb forward.
To shown in Figure 5, described air intake connecting line is the pipeline structure of one for forward and backward two parts are deposited by hot plate as Fig. 2, perhaps, and for two parts tighten together by the hermetically-sealed construction screw.The air outlet 13 of air intake connecting line 1 one ends and the 2 corresponding connections of oven dry air inlet, the other end connects air channel 3, be installed in urceolus 10 rear portions by screw, comprise the adjacent one side of being close to 14 with the urceolus rear portion, opposite one side 15 and both sides 16,17, the air intake connecting line be one along the urceolus rear portion one lateral edges radian is bent upwards pipeline structure to topmost, air outlet 13 is below topmost, direction is towards the oven dry air inlet 2 at urceolus rear portion, therefore both sides one sidepiece 16 is the gabarit that cooperates with urceolus rear part edge circumference, and the other side 17 is interior exterior feature; Gabarit and urceolus rear portion circumference are complementary, the air intake direction arrives top after circumferential go up from the bottom along urceolus, change to be directed downwards to arrive and change wind direction again behind the air outlet and enter in the urceolus 10 by air outlet 13, oven dry air inlet 2 from back to front, this air outlet 13 is a frame structure, is provided with reinforcement 18 in the framework.Described air intake connecting line 1 is provided with one group of wind-guiding groove 19 that changes wind direction and anti-sealing and/or foam and stops muscle 20 by what air intake connecting line air outlet entered air intake connecting line inside, stops that muscle 20 is located in the described air outlet 13.
Stop that muscle 20 is horizontal " fore-telling " font structure, comprise diagonal bar 21 and horizontal bar 22, be located at described air outlet 13 near position by air-out direction in the pipeline, the end of horizontal bar 22 and diagonal bar 21 is fixed on the air outlet side wall, one side of horizontal bar 22 corresponding air outlets cooperates block water and/or foam with diagonal bar 21, and an opposite side can play the effect of wind-guiding.
Described wind-guiding groove 19 comprises second a wind-guiding groove 192 that forms to oven dry air inlet opposite direction protrusion to the first wind-guiding groove 191 and a corresponding air intake connecting line air outlet near the formation of urceolus direction protrusion in air intake connecting line inside, promptly the first wind-guiding groove 191 is positioned at the adjacent one side of being close to 14 with the urceolus rear portion of air intake connecting line, the second wind-guiding groove 192 is positioned at opposite one side 15, the cooperation by the first wind-guiding groove 191 and the second wind-guiding groove 192 with the air intake direction raise earlier afterwards fall after again towards air intake connecting line air outlet 13 wind-guidings.Wind path 24 to the second wind-guiding groove 192 in the air intake connecting line is the structure that bore dwindles, by reducing in the unit circulation area to increase air-out speed.
The limit wall of the described second wind-guiding groove, 192 corresponding air intake connecting line air outlet 13 directions is a slope 30, by the second wind-guiding bottom portion of groove to described air outlet direction low dip gradually; Corresponding air outlet direction is provided with the flow distribution plate 31 that wind is divided at least two bursts of air-out on the slope 30, and flow distribution plate 31 can make air-out form eddy current earlier to increase air-out speed with the chamber of the madial wall formation of pipeline; Preferably, the slope 30 of the described second wind-guiding groove and oven dry air inlet 2 incline structures corresponding coupling are to increase intake velocity.
The present invention is by changing the structure of washing-drying integral machine air intake connecting line, can block water when making washing and/or foam enter in the clothes drying structure, and then avoid influencing the drying system; Two wind-guiding grooves that pass through in the air intake process to increase are to change wind direction and to increase wind speed; Because the air intake direction is to change downwards at top, can prevent that the water and/or the foam that spill from flowing in the heater along the air intake pipeline; Further, be provided with at the air outlet of air intake connecting line and stop that muscle blocks the water and/or the foam stream that spill in the urceolus and gets back in the pipeline, make it can flow back in the urceolus; The corresponding air outlet of the further again second wind-guiding groove is provided with the slope, and water and/or the foam stream both being convenient to spill in the urceolus are got back in the tube, and the air intake direction of also being convenient to air-out direction and urceolus oven dry air inlet cooperates; In addition, the chamber of the madial wall of flow distribution plate on the slope and pipeline formation can make air-out form eddy current earlier to increase air-out speed; Be the structure of dwindling by the first wind-guiding groove to the second wind-guiding groove wind path in the pipeline, further increase air-out speed.The oven dry air inlet inclined design at urceolus rear portion has prolonged the route of hot blast in inner core, has also increased the area and the time of hot blast and clothing heat exchange relatively, has improved drying efficient.The present invention above-mentioned improved simple in structure, cost is low, has prolonged the service life of washing-drying integral machine clothes drying function relatively.

Claims (8)

1. air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine, be installed on the rear portion of washing-drying integral machine urceolus, the urceolus rear portion is provided with the oven dry air inlet, air intake connecting line air outlet and oven dry air inlet corresponding connection is characterized in that: described air intake connecting line is provided with the wind-guiding groove of one group of change wind direction and anti-sealing and/or foam are entered air intake connecting line inside by air intake connecting line air outlet the muscle that stops.
2. a kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine according to claim 1, it is characterized in that: described wind-guiding groove comprises that one protrudes the second wind-guiding groove that form to first a wind-guiding groove that protrude to form near the urceolus direction and a corresponding air intake connecting line air outlet to oven dry air inlet opposite direction in air intake connecting line inside, the cooperation of air intake by the first wind-guiding groove and the second wind-guiding groove with the air intake direction raise earlier afterwards fall after again towards air intake connecting line air outlet wind-guiding.
3. a kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine according to claim 1, it is characterized in that: described air intake connecting line be one along the urceolus rear portion one lateral edges radian is bent upwards pipeline structure to topmost, air intake connecting line air outlet is below topmost, direction is towards the oven dry air inlet at urceolus rear portion, and the described muscle that stops is located in the described air outlet.
4. a kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine according to claim 2, it is characterized in that: the limit wall of the corresponding described air outlet direction of the described second wind-guiding groove is a slope, and is gradually low to described air outlet direction by the second wind-guiding bottom portion of groove.
5. a kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine according to claim 4, it is characterized in that: corresponding air outlet direction is provided with the flow distribution plate that wind is divided at least two bursts of air-out on the described slope.
6. according to claim 1 or 4 described a kind of air intake connecting lines that are used for the anti-aqueous reflux of washing-drying integral machine, it is characterized in that: described oven dry air inlet by after the setting that turns forward, satisfy: the center line of oven dry air inlet extends to that nozzle passes through inner core center and inner core forward flange lower limb successively in the washing-drying integral machine.
7. a kind of air intake connecting line that is used for the anti-aqueous reflux of washing-drying integral machine according to claim 6 is characterized in that: described oven dry air inlet is located at urceolus rear portion top, the air intake direction by after slope down to inner core forward flange lower limb forward.
8. according to claim 1 or 3 described a kind of air intake connecting lines that are used for the anti-aqueous reflux of washing-drying integral machine, it is characterized in that: the described muscle that stops is horizontal " fore-telling " font structure, comprise diagonal bar and horizontal bar, be located at described air outlet near position by air-out direction in the pipeline, the end of horizontal bar and diagonal bar is fixed on the air outlet side wall, corresponding air outlet one side of horizontal bar cooperates block water and/or foam, an opposite side wind-guiding with diagonal bar.
CN201110220595.8A 2011-08-03 2011-08-03 A kind of air intake connecting line of the anti-aqueous reflux for washing-drying integral machine Active CN102286873B (en)

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Publication number Priority date Publication date Assignee Title
CN102978884A (en) * 2012-11-12 2013-03-20 胡杰波 Air-out tray seat structure of dryer
CN106283482A (en) * 2016-11-07 2017-01-04 张朝 Wall-mounted twin tube washing machine
CN106319827A (en) * 2016-10-21 2017-01-11 张朝 Wall-mounted drum washing machine
CN107090690A (en) * 2017-04-21 2017-08-25 青岛海尔滚筒洗衣机有限公司 A kind of washing-drying integral machine for condensing anti-suck
CN108660719A (en) * 2017-03-29 2018-10-16 青岛海尔洗衣机有限公司 A kind of clothes drying device air channel structure and clothes drying device
CN109281119A (en) * 2018-08-31 2019-01-29 无锡小天鹅股份有限公司 Wall-mounted device for clothing processing
CN112032901A (en) * 2020-08-24 2020-12-04 广州优易机械科技有限公司 Ventilation energy-saving equipment of computer lab

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CN1782201A (en) * 2004-11-30 2006-06-07 乐金电子(天津)电器有限公司 Connection structure between drying pipeline and water tub of drum washing machine
CN1782173A (en) * 2004-11-30 2006-06-07 乐金电子(天津)电器有限公司 Drum Washing machine
CN101187121A (en) * 2006-11-21 2008-05-28 三洋电机株式会社 Clothes washing apparatus
JP2010029578A (en) * 2008-07-31 2010-02-12 Panasonic Corp Clothes dryer

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US3841117A (en) * 1973-01-26 1974-10-15 J Crivilles Front loading washing and drying machine
US20040045327A1 (en) * 2002-09-10 2004-03-11 Samsung Electronics Co., Ltd. Drum-type washing machine equipped with drying device
CN1763293A (en) * 2004-10-22 2006-04-26 Lg电子株式会社 Washing machine combined with dryer
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102978884A (en) * 2012-11-12 2013-03-20 胡杰波 Air-out tray seat structure of dryer
CN106319827A (en) * 2016-10-21 2017-01-11 张朝 Wall-mounted drum washing machine
CN106283482A (en) * 2016-11-07 2017-01-04 张朝 Wall-mounted twin tube washing machine
CN108660719A (en) * 2017-03-29 2018-10-16 青岛海尔洗衣机有限公司 A kind of clothes drying device air channel structure and clothes drying device
CN107090690A (en) * 2017-04-21 2017-08-25 青岛海尔滚筒洗衣机有限公司 A kind of washing-drying integral machine for condensing anti-suck
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CN109281119A (en) * 2018-08-31 2019-01-29 无锡小天鹅股份有限公司 Wall-mounted device for clothing processing
CN112032901A (en) * 2020-08-24 2020-12-04 广州优易机械科技有限公司 Ventilation energy-saving equipment of computer lab
CN112032901B (en) * 2020-08-24 2021-07-27 广州优易机械科技有限公司 Ventilation energy-saving equipment of computer lab

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