Appliance for Drying Laundry

• US 20140345155A1
• Filed: 01/03/2013
• Published: 11/27/2014
• Est. Priority Date: 01/05/2012
• Status: Active Grant

• Current Assignee: Electrolux Home Products Corporation NV (AB Electrolux)
• Original Assignee: Electrolux Home Products Corporation NV (AB Electrolux)
• Inventors: Contarini, Andrea, Viero, Massimo
• Granted Patent: US 9,372,031 B2
• Time in Patent Office: Days
• US Class Current: 34/468
• CPC Class Codes: D06F 2101/20 Operation modes, e.g. delicate laundry washing programs, service modes or refreshment cycles
• CPC Class Codes: D06F 2103/36 Flow or velocity
• CPC Class Codes: D06F 2103/50 related to heat pumps, e.g. pressure or flow rate
• CPC Class Codes: D06F 2105/24 Flow or velocity
• CPC Class Codes: D06F 2105/26 Heat pumps
• CPC Class Codes: D06F 2105/30 Blowers
• CPC Class Codes: D06F 2105/54 Changing between normal operation mode and special operation modes, e.g. service mode, component cleaning mode or stand-by mode
• CPC Class Codes: D06F 2105/56 Remaining operation time; Remaining operational cycles
• CPC Class Codes: D06F 25/00 Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air control of washing or of washing and drying D06F33/00, D06F34/00; domestic laundry dryers D06F58/00
• CPC Class Codes: D06F 34/28 Arrangements for program selection, e.g. control panels therefor; Arrangements for indicating program parameters, e.g. the selected program or its progress
• CPC Class Codes: D06F 58/206 Heat pump arrangements
• CPC Class Codes: D06F 58/38 of drying, e.g. to achieve the target humidity
• CPC Class Codes: F26B 21/086 by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle

Abstract

An appliance for drying laundry (100) including a drying-air moisture-condensing system comprising a heat pump system (215,220,225) with a variable-output compressor (210), and at least one drying air variable-speed fan (250) for promoting the recirculation of the drying air, the appliance being adapted to perform at least one laundry drying cycle in: at least a first drying mode wherein the compressor is driven to a first compressor mode having a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a first fan mode having a speed course, and at least a second drying mode wherein the compressor is driven to a second compressor mode comprising a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a second fan mode having a speed course, wherein for at least a portion of the drying cycle, a compressor power consumption and/or a compressor rotational speed and/or a frequency of the supply current/voltage of the compressor of the second compressor mode is/are higher than the one/s of the first compressor mode and the speed of the second fan mode is higher than the speed of the first fan mode.

Claims

1. An appliance for drying laundry (100) including a drying-air moisture-condensing system comprising a heat pump system (215,220,225) with a variable-output compressor (210), and at least one drying air variable-speed fan (250) for promoting the recirculation of the drying air, the appliance being adapted to perform at least one laundry drying cycle in:

at least a first drying mode wherein the compressor is driven to a first compressor mode having a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a first fan mode having a speed course, and

at least a second drying mode wherein the compressor is driven to a second compressor mode comprising a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a second fan mode having a speed course,

wherein for at least a portion of the drying cycle, a compressor power consumption and/or a compressor rotational speed and/or a frequency of the supply current/voltage of the compressor of the second compressor mode is/are higher than the one/s of the first compressor mode and the speed of the second fan mode is higher than the speed of the first fan mode.

2. The appliance of claim 1, wherein said portion of the drying cycle is 30%-100%, or 40%-90%, or 50%-80%, or 60%-70% of a remaining portion of the drying cycle after an initial transient after the compressor has been activated.

3. The appliance of claim 1 or 2, wherein said compressor power consumption and/or compressor rotational speed and/or frequency of the supply current/voltage of the compressor of the second compressor mode is/are higher than the one/s of the first compressor mode and the speed of the second fan mode is higher than the speed of the first fan mode after a time interval has elapsed from the compressor activation.

4. The appliance of any one of the preceding claims, comprising a control unit (265) adapted to automatically activate the second drying mode when a user actuates a command input means (315) of a user interface (121) of the appliance.

5. The appliance of claim 4, wherein said command input means is distinct from a laundry treatment cycle selector (305) actuatable by the user for selecting a laundry treatment cycle to be executed.

6. The appliance of claim 5, wherein the user interface further includes an appliance start input means (310), operable by the user to cause the appliance start the execution of the laundry treatment cycle selected by the user through laundry treatment cycle selector, and wherein the appliance is adapted to perform the at least one drying cycle in said second drying mode if said command input means are actuated before the user activation of the start input means.

7. The appliance of any one of the preceding claims, further adapted to perform the at least one drying cycle according to at least a third drying mode wherein the compressor is driven to a third compressor mode comprising a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a third fan mode having a speed course, wherein for at least said portion of the drying cycle, a compressor power consumption and/or a compressor rotational speed and/or a frequency of the supply current/voltage of the compressor of the third compressor mode is/are lower than the one/s of the first compressor mode and the speed of the third fan mode is lower that the speed of the first fan mode.

8. The appliance of claim 7, wherein said compressor power consumption and/or compressor rotational speed and/or frequency of the supply current/voltage of the compressor of the third compressor mode is/are lower than the one/s of the first compressor mode and the speed of the third fan mode is lower than the speed of the first fan mode after a time interval has elapsed from the compressor activation.

9. The appliance of claims 3 to 8, wherein said time interval is of at least 10, or at least 15, or at least 20, or at least 25, or at least 30 minutes.

10. The appliance of any one of claims 7 to 9 when depending from claim 4, wherein said control unit is adapted to activate said third drying mode when the user actuates said command input means, or another actuation device.

11. A method of drying laundry in an appliance for drying laundry (100) including a drying-air moisture-condensing system comprising a heat pump system (215,220,225) with a variable-output compressor (210), and at least one drying air variable-speed fan (250) for promoting the recirculation of the drying air, the method comprising performing at least one laundry drying cycle in:

at least a first drying mode wherein the compressor is driven to a first compressor mode having a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a first fan mode having a speed course, and

at least a second drying mode wherein the compressor is driven to a second compressor mode comprising a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a second fan mode having a speed course,

wherein for at least a portion of the drying cycle, a compressor power consumption and/or a compressor rotational speed and/or a frequency of the supply current/voltage of the compressor of the second compressor mode is/are higher than the one/s of the first compressor mode and the speed of the second fan mode is higher than the speed of the first fan mode.

12. The method of claim 11, wherein said compressor power consumption and/or a compressor rotational speed and/or a frequency of the supply current/voltage of the compressor of the second compressor mode is/are higher than the one/s of the first compressor mode and the speed of the second fan mode is higher than the speed of the first fan mode after a time interval has elapsed from the compressor activation.

13. The method of claim 11 or 12, wherein the second drying mode is activatable by a user by actuating a command input means (315) of a user interface (121) of the appliance.

14. The method of any one of claims 11 to 13, further comprising:

performing the at least one drying cycle according to at least a third drying mode wherein the compressor is driven to a third compressor mode comprising a compressor power consumption course and/or a compressor rotational speed course and/or a frequency course of the supply current/voltage of the compressor motor and the fan is driven to a third fan mode having a speed course, wherein for at least a portion of the drying cycle, a compressor power consumption and/or a compressor rotational speed and/or a frequency of the supply current/voltage of the compressor of the third compressor mode is/are lower than the one/s of the first compressor mode and the speed of the third fan mode is lower that the speed of the first fan mode.

15. The method of claim 14, wherein said compressor power consumption and/or compressor rotational speed and/or frequency of the supply current/voltage of the compressor of the third compressor mode is/are lower than the one/s of the first compressor mode and the speed of the third fan mode is lower that the speed of the first fan mode after said time interval has elapsed from the compressor activation.