EP2014819B1 - Microwave laundry drier - Google Patents
Microwave laundry drier Download PDFInfo
- Publication number
- EP2014819B1 EP2014819B1 EP07112491A EP07112491A EP2014819B1 EP 2014819 B1 EP2014819 B1 EP 2014819B1 EP 07112491 A EP07112491 A EP 07112491A EP 07112491 A EP07112491 A EP 07112491A EP 2014819 B1 EP2014819 B1 EP 2014819B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microwave
- laundry drier
- drying chamber
- microwave energy
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 238000001035 drying Methods 0.000 claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000009423 ventilation Methods 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 2
- 230000005672 electromagnetic field Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
- D06F58/26—Heating arrangements, e.g. gas heating equipment
- D06F58/266—Microwave heating equipment
Definitions
- the present invention relates to a microwave laundry drier.
- Known laundry driers operate in various ways, and in particular may condense a stream of hot air blown into a drying drum to remove moisture from the laundry, or may exhaust the stream of moisture-laden hot air directly from the drier.
- Known laundry driers comprise a ventilation system (i. e. usually a blower comprising a fan and an electric fan motor) and a heating arrangement, which draw air from outside, and heat and blow the air into and through the laundry drum; and the hot drying air is then either exhausted directly from the drier or fed to condensing means to condense the moisture collected in the hot air.
- a known condensation laundry drier comprises a laundry drum; an air intake conduit for feeding the hot drying air into the drum through an inflow opening; and an air outlet or exhaust conduit for exhausting the hot drying air from the drum through an outflow opening.
- the air conduits are connected to each other by a condenser for condensing the moisture in the hot drying air flowing through it.
- drying is by indirect heating: an electric heating element heats an airflow, and the air removes moisture from the laundry.
- standard drying cycle time can only be shortened by increasing either heating power or airflow.
- a commercial drier heating element absorbs 2.2-2.4 kW electric power, and, since, in certain European countries (e.g. Italy), most houses have a contract which allows maximum electric power absorption from the mains of 3kW, no significant increase can be made in the heating power of the heating element.
- airflow is limited by the size of the air ducts, fans, and the machine itself, increasing airflow is complicated and expensive, by involving complete redesign of the machine.
- increasing airflow results in a corresponding increase in the noise level of the machine, and so calls for high-cost noise-damping improvements.
- a microwave drier employing other heating technologies, such as microwaves. Microwaves show considerable potential in shortening drying time, by coupling directly with water (direct heating).
- a microwave drier comprises a casing housing a drying chamber; a blower connected by a duct to the drying chamber to draw air through the chamber from openings in both the chamber and the casing; and a microwave energy source for directing microwave energy to the drying chamber.
- the drying chamber may be in the form of a revolving tumble drum mounted inside the casing, or in the form of a stationary container; and airflow into the drying chamber may be preheated to improve removal of the evaporated moisture from the drying chamber.
- CA 1 092 198 discloses, is a motorized clothes drier which is heated by microwaves. It consists of an outer stationary vented shell in which rotates a motorized drum. The shell is provided with a loading door which is in line with an opening in the drum. To the back of the loading door is attached a container in which is centrally located a reflector containing one or more microwave magnetron tubes. When the loading door is closed, the magnetron container penetrates partly into the drum. The rear of the drum is provided with a vented conical baffle which reflects the microwaves.
- a drive for rotating the drum consisting of an electric motor, pulleys, and belt, is located within the shell. Also located within the shell is an exhaust fan which removes the air and vapour at a rate to create a partial vacuum within the drum.
- the main problem in a microwave laundry drier is containing the microwaves inside the drying chamber, to ensure user safety and maximize energy transfer to the laundry, which means forming around the drying chamber a closed environment which perfectly reflects (and so contains) the microwaves.
- the weak area of such a closed environment is the door, for loading/unloading wet/dry laundry into/from the drying chamber, and which constitutes a possible microwave leakage point.
- Number 1 in Figure 1 indicates as a whole a laundry drier comprising a casing 2 resting on a floor on a number of feet.
- Casing 2 supports a revolving laundry drum 3 which defines a drying chamber 4, rotates about a horizontal rotation axis 5 (in alternative embodiments not shown, rotation axis 5 may be tilted or vertical), and has a front access opening 6 closed by a door 7 hinged to a front wall of casing 2.
- Drum 3 is rotated by an electric motor (not shown), and is fed through with a stream of drying air fed into drum 3 by an exhaust-type ventilation system 8 (i.e. in which the hot drying air from drum 3 is exhausted directly into the external environment).
- Ventilation system 8 comprises an air intake conduit 9 for drawing in outside air, heating the air, and feeding the hot drying air into drum 3 through an inflow opening 10; an air exhaust conduit 11 for exhausting the moist, hot drying air from the drum to the outside through an outflow opening 12; and a centrifugal fan 13 and a heating device 14 located along air intake conduit 9.
- ventilation system 8 may comprise a condenser located along air exhaust conduit 11 to condense the vapour in the stream of moist, hot air from drum 3, and at least part of the dry air from the condenser may be fed back into air intake conduit 9.
- Microwave laundry drier 1 comprises a microwave energy source 15 for directing microwave energy to drying chamber 4.
- microwave energy source 15 is fixed to a front panel 16, which is supported by casing 2 (in particular, may form part of or be fixed to casing 2) and has a central opening 17 coaxial with front access opening 6 of drying chamber 4.
- Microwave energy source 15 comprises four magnetrons 18 arranged symmetrically around central opening 17 in front panel 16 and fixed (screwed) to the back of front panel 16 to prevent microwave leakage inwards of casing 2.
- Each magnetron 18 has a magnetron body 19 located inside casing 2; and a magnetron antenna 20, which emits the microwave energy and is located outside casing 2 through a hole 21 in front panel 16.
- microwave energy source 15 comprises, for each magnetron 18, a waveguide device 22 to guide the microwaves towards drying chamber 4.
- Each waveguide device 22 comprises a housing 23, which is supported by front panel 16, surrounds magnetron antenna 20, and has an open side 24 towards the centre of central opening 17 in front panel 16.
- Each waveguide device 22 also comprises a deflector 25, which is supported by door 7, when door 7 is closed, is located in front of open side 24 of housing 23, and is designed to direct the microwaves towards drying chamber 4.
- each deflector 25 has an inclined surface 26 facing open side 24 of housing 23 when door 7 is closed.
- air intake conduit 9 is connected to microwave energy source 15 so that at least part of the drying air flows past microwave energy source 15 to transfer heat from microwave energy source 15 to the drying air. More specifically, the fresh drying air (i.e. the drying air from outside, not yet heated by heating device 14) flows past magnetron bodies 19 of magnetrons 18 to cool magnetron bodies 19 and, at the same time, preheat the fresh drying air upstream from heating device 14 (which, of course, is located downstream from microwave energy source 15).
- the fresh drying air i.e. the drying air from outside, not yet heated by heating device 14
- the fresh drying air flows past magnetron bodies 19 of magnetrons 18 to cool magnetron bodies 19 and, at the same time, preheat the fresh drying air upstream from heating device 14 (which, of course, is located downstream from microwave energy source 15).
- magnetrons 18 may have heat losses of up to 50% of energy supply. For example, to get 0.9 kW microwaves (nominally 1 kW), they need approximately 1.4 kW electric energy from the mains, and so dissipate into heat about 0.4-0.7 kW. Feeding the fresh drying air past microwave energy source 15 optimizes energy consumption, by virtue of all the electric energy supplied to magnetrons 18 being used for machine purposes : part is converted to microwave energy, and part is used to heat the drying air.
- microwave laundry drier 1 comprises an annular reflecting element 27 surrounding central opening 17 in front panel 16 to form a microwave barrier.
- annular reflecting element 27 may be supported by door 7, by front panel 16, or by casing 2.
- annular reflecting element 27 creates an electromagnetic field discontinuity that blocks the microwaves, and is defined by a number of small T-shaped projections equal in size to one-quarter of the microwave energy wavelength to create impedance decoupling and reflect the microwaves.
- Microwave laundry drier 1 as described above has numerous advantages, by being cheap and easy to implement, and by providing a rational arrangement of microwave energy source 15. More specifically, fixing microwave energy source 15 to the front panel provides for optimizing use of the inner volume of casing 2, for easy connection of air intake conduit 9 to microwave energy source 15, and for easily directing all the microwaves inside drying chamber 4, thus ensuring perfect microwave isolation.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
- The present invention relates to a microwave laundry drier.
- Known laundry driers operate in various ways, and in particular may condense a stream of hot air blown into a drying drum to remove moisture from the laundry, or may exhaust the stream of moisture-laden hot air directly from the drier. Known laundry driers comprise a ventilation system (i. e. usually a blower comprising a fan and an electric fan motor) and a heating arrangement, which draw air from outside, and heat and blow the air into and through the laundry drum; and the hot drying air is then either exhausted directly from the drier or fed to condensing means to condense the moisture collected in the hot air.
- A known condensation laundry drier comprises a laundry drum; an air intake conduit for feeding the hot drying air into the drum through an inflow opening; and an air outlet or exhaust conduit for exhausting the hot drying air from the drum through an outflow opening. The air conduits are connected to each other by a condenser for condensing the moisture in the hot drying air flowing through it.
- At present, drying is by indirect heating: an electric heating element heats an airflow, and the air removes moisture from the laundry. Using this method, standard drying cycle time can only be shortened by increasing either heating power or airflow. A commercial drier heating element, however, absorbs 2.2-2.4 kW electric power, and, since, in certain European countries (e.g. Italy), most houses have a contract which allows maximum electric power absorption from the mains of 3kW, no significant increase can be made in the heating power of the heating element. And, since airflow is limited by the size of the air ducts, fans, and the machine itself, increasing airflow is complicated and expensive, by involving complete redesign of the machine. Furthermore, increasing airflow results in a corresponding increase in the noise level of the machine, and so calls for high-cost noise-damping improvements.
- As disclosed, for example, in Patents
US4356640A1 ,US4490923A1 ,US4765066A1 ,US4510361A1 andUS6393725A1 , driers employing other heating technologies, such as microwaves, have been proposed. Microwaves show considerable potential in shortening drying time, by coupling directly with water (direct heating). For example, a microwave drier comprises a casing housing a drying chamber; a blower connected by a duct to the drying chamber to draw air through the chamber from openings in both the chamber and the casing; and a microwave energy source for directing microwave energy to the drying chamber. As the microwave energy heats and vaporizes the water in the laundry to be dried, the evaporated moisture is drawn out of the drying chamber by the air flowing through it, and is exhausted into the atmosphere. The drying chamber may be in the form of a revolving tumble drum mounted inside the casing, or in the form of a stationary container; and airflow into the drying chamber may be preheated to improve removal of the evaporated moisture from the drying chamber. -
CA 1 092 198 discloses, is a motorized clothes drier which is heated by microwaves. It consists of an outer stationary vented shell in which rotates a motorized drum. The shell is provided with a loading door which is in line with an opening in the drum. To the back of the loading door is attached a container in which is centrally located a reflector containing one or more microwave magnetron tubes. When the loading door is closed, the magnetron container penetrates partly into the drum. The rear of the drum is provided with a vented conical baffle which reflects the microwaves. A drive for rotating the drum consisting of an electric motor, pulleys, and belt, is located within the shell. Also located within the shell is an exhaust fan which removes the air and vapour at a rate to create a partial vacuum within the drum. - The main problem in a microwave laundry drier is containing the microwaves inside the drying chamber, to ensure user safety and maximize energy transfer to the laundry, which means forming around the drying chamber a closed environment which perfectly reflects (and so contains) the microwaves. The weak area of such a closed environment is the door, for loading/unloading wet/dry laundry into/from the drying chamber, and which constitutes a possible microwave leakage point.
- In known microwave laundry driers, the door configuration is complicated and expensive, and does not always guarantee perfect isolation of the microwaves.
- It is an object of the present invention to provide a microwave laundry drier designed to eliminate the aforementioned drawbacks, and which is cheap and easy to implement, and in particular has a door configuration which completely seals the closed environment around the drying chamber to maximize energy transfer to the wet laundry and prevent microwave leakage to the surrounding outside environment.
- According to the present invention, there is provided a microwave laundry drier as claimed in the accompanying Claims.
- A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
-
Figure 1 shows a schematic side view of a microwave laundry drier in accordance with the present invention; -
Figure 2 shows a view in perspective of a front panel of theFigure 1 microwave laundry drier; -
Figure 3 shows an enlarged view in perspective of a portion of theFigure 2 front panel; and -
Figure 4 shows a section of a lateral portion of a door of theFigure 1 microwave laundry drier. - Number 1 in
Figure 1 indicates as a whole a laundry drier comprising acasing 2 resting on a floor on a number of feet.Casing 2 supports a revolvinglaundry drum 3 which defines adrying chamber 4, rotates about a horizontal rotation axis 5 (in alternative embodiments not shown, rotation axis 5 may be tilted or vertical), and has afront access opening 6 closed by adoor 7 hinged to a front wall ofcasing 2.Drum 3 is rotated by an electric motor (not shown), and is fed through with a stream of drying air fed intodrum 3 by an exhaust-type ventilation system 8 (i.e. in which the hot drying air fromdrum 3 is exhausted directly into the external environment). -
Ventilation system 8 comprises anair intake conduit 9 for drawing in outside air, heating the air, and feeding the hot drying air intodrum 3 through aninflow opening 10; anair exhaust conduit 11 for exhausting the moist, hot drying air from the drum to the outside through anoutflow opening 12; and acentrifugal fan 13 and aheating device 14 located alongair intake conduit 9. - It should be pointed out that the arrangement of
ventilation system 8 is referred to here purely by way of example in connection with one embodiment of the present invention, and may be different. For example,ventilation system 8 may comprise a condenser located alongair exhaust conduit 11 to condense the vapour in the stream of moist, hot air fromdrum 3, and at least part of the dry air from the condenser may be fed back intoair intake conduit 9. - Microwave laundry drier 1 comprises a
microwave energy source 15 for directing microwave energy to dryingchamber 4. As shown inFigures 1 and2 ,microwave energy source 15 is fixed to afront panel 16, which is supported by casing 2 (in particular, may form part of or be fixed to casing 2) and has acentral opening 17 coaxial with front access opening 6 ofdrying chamber 4.Microwave energy source 15 comprises fourmagnetrons 18 arranged symmetrically aroundcentral opening 17 infront panel 16 and fixed (screwed) to the back offront panel 16 to prevent microwave leakage inwards ofcasing 2. Eachmagnetron 18 has amagnetron body 19 located insidecasing 2; and amagnetron antenna 20, which emits the microwave energy and is located outsidecasing 2 through ahole 21 infront panel 16. - As shown in
Figures 3 and4 ,microwave energy source 15 comprises, for eachmagnetron 18, awaveguide device 22 to guide the microwaves towardsdrying chamber 4. Eachwaveguide device 22 comprises ahousing 23, which is supported byfront panel 16, surroundsmagnetron antenna 20, and has anopen side 24 towards the centre ofcentral opening 17 infront panel 16. Eachwaveguide device 22 also comprises adeflector 25, which is supported bydoor 7, whendoor 7 is closed, is located in front ofopen side 24 ofhousing 23, and is designed to direct the microwaves towardsdrying chamber 4. In a preferred embodiment, eachdeflector 25 has aninclined surface 26 facingopen side 24 ofhousing 23 whendoor 7 is closed. - In the preferred embodiment shown in
Figure 1 ,air intake conduit 9 is connected tomicrowave energy source 15 so that at least part of the drying air flows pastmicrowave energy source 15 to transfer heat frommicrowave energy source 15 to the drying air. More specifically, the fresh drying air (i.e. the drying air from outside, not yet heated by heating device 14) flows pastmagnetron bodies 19 ofmagnetrons 18 to coolmagnetron bodies 19 and, at the same time, preheat the fresh drying air upstream from heating device 14 (which, of course, is located downstream from microwave energy source 15). - In connection with the above, it is important to point out that
magnetrons 18 may have heat losses of up to 50% of energy supply. For example, to get 0.9 kW microwaves (nominally 1 kW), they need approximately 1.4 kW electric energy from the mains, and so dissipate into heat about 0.4-0.7 kW. Feeding the fresh drying air pastmicrowave energy source 15 optimizes energy consumption, by virtue of all the electric energy supplied tomagnetrons 18 being used for machine purposes : part is converted to microwave energy, and part is used to heat the drying air. - As shown in
Figure 1 , microwave laundry drier 1 comprises an annular reflectingelement 27 surroundingcentral opening 17 infront panel 16 to form a microwave barrier. In equivalent embodiments, annular reflectingelement 27 may be supported bydoor 7, byfront panel 16, or bycasing 2. For example, annular reflectingelement 27 creates an electromagnetic field discontinuity that blocks the microwaves, and is defined by a number of small T-shaped projections equal in size to one-quarter of the microwave energy wavelength to create impedance decoupling and reflect the microwaves. - Microwave laundry drier 1 as described above has numerous advantages, by being cheap and easy to implement, and by providing a rational arrangement of
microwave energy source 15. More specifically, fixingmicrowave energy source 15 to the front panel provides for optimizing use of the inner volume ofcasing 2, for easy connection ofair intake conduit 9 tomicrowave energy source 15, and for easily directing all the microwaves insidedrying chamber 4, thus ensuring perfect microwave isolation.
Claims (14)
- A microwave laundry drier (1) comprising:a casing (2) comprising a front panel (16) provided with a central opening (17);a drying chamber (4) housed inside the casing (2) and having a front access opening (6) for loading/unloading clothes;a door (7) hinged to the front panel (16) of the casing (2) to close the access to the drying chamber (4);a microwave energy source (15) and a waveguide device (22) for directing microwave energy to the drying chamber (4) through the front access opening (6);the microwave laundry drier (1) being characterized in that the microwave energy source (15) is fixed to the back of the front panel (16) inside the casing (2)
- A microwave laundry drier (1) as claimed in Claim 1, wherein the microwave energy source (15) comprises at least one magnetron (18) having a magnetron body (19) located inside the casing (2), and a magnetron antenna (20) emitting the microwave energy and located outside the casing (2); the front panel (16) comprising a hole (21), through which the magnetron antenna (20) is fitted.
- A microwave laundry drier (1) as claimed in Claim 2, wherein the microwave energy source (15) comprises a number of magnetrons (18) arranged symmetrically around the central opening (17) in the front panel (16).
- A microwave laundry drier (1) as claimed in Claim 2 or 3, and comprising, for each magnetron (18), a waveguide device (22) to guide the microwaves towards the drying chamber (4).
- A microwave laundry drier (1) as claimed in Claim 4, wherein each waveguide device (22) comprises a housing (23), which is supported by the front panel (16), surrounds the magnetron antenna (20), and has an open side (24) towards the centre of the central opening (17) in the front panel (16),
- A microwave laundry drier (1) as claimed in Claim 5, wherein each waveguide device (22) comprises a deflector (25), which is supported by the door (7), when the door (7) is closed, is located in front of the open side (24) of the housing (23), and is designed to direct the microwaves towards the drying chamber (4).
- A microwave laundry drier (1) as claimed in Claim 5, wherein each deflector (25) has an inclined surface (26) facing the open side (24) of the housing (23) when the door (7) is closed.
- A microwave laundry drier (1) as claimed in any of Claims 1 to 7, and comprising a ventilation system (8), which blows drying air through the drying chamber (4), and comprises an air intake conduit (9) for feeding the drying air into the drying chamber (4) through an inflow opening (10), and an air exhaust conduit (11) for exhausting the drying air from the drying chamber (4) through an outflow opening (12); the air intake conduit (9) is connected to the microwave energy source (15) so that at least part of the drying air flows past the microwave energy source (15) to transfer heat from the microwave energy source (15) to the drying air.
- A microwave laundry drier (1) as claimed in Claim 8, wherein the ventilation system (8) comprises a heating device (14) located downstream from the microwave energy source (15) to heat the drying air.
- A microwave laundry drier (1) as claimed in any of Claims 1 to 9, and comprising an annular reflecting element (27), which surrounds the central opening (17) in the front panel (16) to create a microwave barrier.
- A microwave laundry drier (1) as claimed in Claim 10, wherein the annular reflecting element (27) is supported by the door (7).
- A microwave laundry drier (1) as claimed in Claim 10, wherein the annular reflecting element (27) is supported by the front panel (16) or the casing (2).
- A microwave laundry drier (1) as claimed in Claim 10, 11 or 12, wherein the annular reflecting element (27) creates an electromagnetic field discontinuity that blocks the microwaves, and is defined by a number of small T-shaped projections equal in size to one-quarter of the microwave energy wavelength to create impedance decoupling and reflect the microwaves.
- A microwave laundry drier (1) as claimed in any of Claims 1 to 13, wherein the drying chamber (4) is defined by a revolving laundry drum (3).
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT07112491T ATE499477T1 (en) | 2007-07-13 | 2007-07-13 | MICROWAVE Tumble Dryer |
EP07112491A EP2014819B1 (en) | 2007-07-13 | 2007-07-13 | Microwave laundry drier |
PL07112491T PL2014819T3 (en) | 2007-07-13 | 2007-07-13 | Microwave laundry drier |
DE602007012678T DE602007012678D1 (en) | 2007-07-13 | 2007-07-13 | Microwave clothes dryer |
ES07112491T ES2362341T3 (en) | 2007-07-13 | 2007-07-13 | MICROWAVE CLOTHES DRYER. |
RU2008128373/12A RU2459896C2 (en) | 2007-07-13 | 2008-07-11 | Microwave drying machine for linen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07112491A EP2014819B1 (en) | 2007-07-13 | 2007-07-13 | Microwave laundry drier |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2014819A1 EP2014819A1 (en) | 2009-01-14 |
EP2014819B1 true EP2014819B1 (en) | 2011-02-23 |
Family
ID=38667073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07112491A Not-in-force EP2014819B1 (en) | 2007-07-13 | 2007-07-13 | Microwave laundry drier |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2014819B1 (en) |
AT (1) | ATE499477T1 (en) |
DE (1) | DE602007012678D1 (en) |
ES (1) | ES2362341T3 (en) |
PL (1) | PL2014819T3 (en) |
RU (1) | RU2459896C2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106436236B (en) * | 2016-11-28 | 2018-10-23 | 广东美的厨房电器制造有限公司 | A kind of dryer |
CN106868827B (en) * | 2017-04-12 | 2023-06-23 | 广东美的厨房电器制造有限公司 | Microwave wave clothes dryer |
CN106868828B (en) * | 2017-04-12 | 2023-07-25 | 广东美的厨房电器制造有限公司 | Microwave clothes dryer |
CN113668203A (en) * | 2021-09-14 | 2021-11-19 | 宁波乐士实业有限公司 | Mini type roller clothes dryer and using method thereof |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1092198A (en) * | 1977-04-04 | 1980-12-23 | James A. Toyne | Microwave clothes drier with a vented conical baffle |
CH650540A5 (en) * | 1980-07-02 | 1985-07-31 | Christian Jansson | METHOD FOR HEATING WASHING WATER AND WASHING AND / OR DRYING MACHINE FOR CARRYING OUT THE METHOD. |
US4510361A (en) * | 1982-05-03 | 1985-04-09 | Mahan Douglas P | Horizontal axis tumbler type microwave drying mechanism |
US4510697A (en) * | 1983-01-19 | 1985-04-16 | Gary Beasley | Microwave clothes dryer |
RU2078522C1 (en) * | 1993-09-14 | 1997-05-10 | Валерий Николаевич Громыко | General-purpose combined drying unit |
DE19642968A1 (en) * | 1996-10-18 | 1998-04-23 | Tkadlec Stanislav Dipl Ing | Drum drying chamber for textiles |
DE19828242A1 (en) * | 1998-06-25 | 1999-12-30 | Aeg Hausgeraete Gmbh | Front-loading laundry dryer has perforated drum |
WO2005059230A1 (en) * | 2003-12-15 | 2005-06-30 | Arcelik Anonim Sirketi | A washer/dryer |
-
2007
- 2007-07-13 PL PL07112491T patent/PL2014819T3/en unknown
- 2007-07-13 EP EP07112491A patent/EP2014819B1/en not_active Not-in-force
- 2007-07-13 ES ES07112491T patent/ES2362341T3/en active Active
- 2007-07-13 AT AT07112491T patent/ATE499477T1/en not_active IP Right Cessation
- 2007-07-13 DE DE602007012678T patent/DE602007012678D1/en active Active
-
2008
- 2008-07-11 RU RU2008128373/12A patent/RU2459896C2/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
PL2014819T3 (en) | 2011-09-30 |
ATE499477T1 (en) | 2011-03-15 |
EP2014819A1 (en) | 2009-01-14 |
RU2008128373A (en) | 2010-01-20 |
RU2459896C2 (en) | 2012-08-27 |
ES2362341T3 (en) | 2011-07-01 |
DE602007012678D1 (en) | 2011-04-07 |
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