CA2430471A1 - Clothes dryer over-voltage control apparatus and method - Google Patents
Clothes dryer over-voltage control apparatus and method Download PDFInfo
- Publication number
- CA2430471A1 CA2430471A1 CA002430471A CA2430471A CA2430471A1 CA 2430471 A1 CA2430471 A1 CA 2430471A1 CA 002430471 A CA002430471 A CA 002430471A CA 2430471 A CA2430471 A CA 2430471A CA 2430471 A1 CA2430471 A1 CA 2430471A1
- Authority
- CA
- Canada
- Prior art keywords
- voltage
- heater
- switch device
- power supply
- controller
- 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.)
- Granted
Links
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
- D06F58/32—Control of operations performed in domestic laundry dryers
- D06F58/34—Control of operations performed in domestic laundry dryers characterised by the purpose or target of the control
- D06F58/50—Responding to irregular working conditions, e.g. malfunctioning of blowers
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/38—Time, e.g. duration
-
- 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
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
-
- 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/28—Electric heating
Abstract
An over-voltage control device for a clothes dryer including an electrical heater coupled to an alternating current power supply is provided. The device includes a switch device adapted to connect and disconnect the power supply from the heater, and a micro-controller coupled to the switch device. The switch device is responsive to said micro-controller, and the micro-controller is configured to operate said switch to maintain an effective heater voltage below a predetermined threshold to avoid tripping of a circuit breaker.
Claims (20)
1. An over-voltage control device for a clothes dryer including an electrical heater coupled to an alternating current power supply, said device comprising, a switch device adapted to connect and disconnect the power supply from the heater; and a micro-controller coupled to said switch device, said switch device responsive to said micro-controller, said micro-controller configured to operate said switch to maintain an effective heater voltage below a predetermined threshold to avoid tripping of a circuit breaker.
2. An over-voltage control device in accordance with Claim 1 wherein said micro-controller is configured to operate said switch device to skip a predetermined number of power supply voltage cycles in an occurrence of a predetermined time period.
3. An over-voltage control device in accordance with Claim 1 wherein said micro-controller is configured to operate said switch to achieve a step reduction in the voltage applied to the heater through said switch device, said step reduction governed by the relationship where V ave is a heater rated voltage, N is a frequency of the input power supply, and t is a predetermined time period for over-voltage compensation.
4. An over-voltage control device in accordance with Claim 1 further comprising a voltage converter configured to produce a DC reference voltage corresponding to an operating voltage of the heater.
5. An over-voltage device in accordance with Claim 4, said micro-controller configured to compare said reference voltage to a predetermined threshold and operating said switch device if said reference voltage is greater than a predetermined threshold.
6. An over-voltage control system for a clothes dryer including an electrical heater, said control system comprising:
a switch device adapted to disconnect the heater from an alternating current power supply;
a voltage converter coupled to the heater; and a micro-controller coupled to said voltage converter and operatively coupled to the heater, said micro-controller configured to compare a signal from the voltage converter to a predetermined threshold value, and when the reference voltage is greater than the threshold value to operate said switch device to maintain an effective voltage applied to the heater at a voltage level below a rated voltage of the heater.
a switch device adapted to disconnect the heater from an alternating current power supply;
a voltage converter coupled to the heater; and a micro-controller coupled to said voltage converter and operatively coupled to the heater, said micro-controller configured to compare a signal from the voltage converter to a predetermined threshold value, and when the reference voltage is greater than the threshold value to operate said switch device to maintain an effective voltage applied to the heater at a voltage level below a rated voltage of the heater.
7. An over-voltage control system in accordance with Claim 6 wherein said switch device is operated for a time sufficient to achieve a predetermined step reduction in heater voltage.
8. An over-voltage control system in accordance with Claim 7 wherein said voltage step reduction is governed by where V ave is a heater rated voltage, N is a frequency of the input power supply, and t is a predetermined time period for over-voltage compensation.
9. An over-voltage control system in accordance with Claim 6 wherein said switch device is a triac switch.
10. An over-voltage control system in accordance with Claim 6 wherein said micro-controller is configured to activate said switch device to disconnect the power supply from the heater for an amount of time corresponding to a number of skipped voltage cycles from the power supply.
11. A clothes dryer comprising:
a cabinet;
a drum rotatably mounted within said cabinet;
a fan for circulating air within said drum;
an electrical heater for warming air circulated by said fan;
a switch device coupled between said heater and an alternating current power supply, and a controller coupled to said switch device and configured to operate said switch to achieve a step reduction in the power supply voltage to the heater through said switch device, said step reduction governed by the relationship where V ave is a heater rated voltage, N is a frequency of the input power supply, and t is a predetermined time period for over-voltage compensation.
a cabinet;
a drum rotatably mounted within said cabinet;
a fan for circulating air within said drum;
an electrical heater for warming air circulated by said fan;
a switch device coupled between said heater and an alternating current power supply, and a controller coupled to said switch device and configured to operate said switch to achieve a step reduction in the power supply voltage to the heater through said switch device, said step reduction governed by the relationship where V ave is a heater rated voltage, N is a frequency of the input power supply, and t is a predetermined time period for over-voltage compensation.
12. A clothes dryer in accordance with Claim 11 further comprising a voltage converter adapted to monitor an actual voltage applied to said heater, said voltage converter generating a DC reference voltage for input to said controller.
13. A clothes dryer in accordance with Claim 12 wherein said controller is configured to compare said DC reference voltage to a predetermined threshold voltage, and based upon said comparison, to connect or disconnect said power supply from said heater through said switch.
14. A clothes dryer in accordance with Claim 13 wherein said controller is configured to reduce power supply voltage in one step increments.
15. A clothes dryer in accordance with Claim 14 wherein said controller comprises a skipped cycle counter, said controller configured to increment a counter value in response to a comparison of said DC reference voltage, said threshold voltage, and said controller configured to decrement the counter value in response to a comparison between the DC reference signal and a difference between the threshold voltage and said step reduction.
16. A method for controlling an electrical heater of a clothes dryer in an over-voltage condition, the clothes dryer including a controller coupled to a switch device for regulating a power supply input to the heater through operation of the switch, said method comprising:
comparing an effective heater voltage to a threshold heater voltage; and when the effective heater voltage is greater than the threshold voltage, opening the switch device to disconnect the power supply from the heater, said opening of the switch device for a predetermined number of voltage cycles on a periodic basis.
comparing an effective heater voltage to a threshold heater voltage; and when the effective heater voltage is greater than the threshold voltage, opening the switch device to disconnect the power supply from the heater, said opening of the switch device for a predetermined number of voltage cycles on a periodic basis.
17. A method in accordance with Claim 16, the dryer further including a voltage converter monitoring actual voltage across said heater, the voltage converter generating a DC voltage reference signal input to said controller, said step of comparing an effective heater voltage to a predetermined reference voltage signal comprising comparing the DC voltage reference signal to a predetermined reference signal.
18. A method in accordance with Claim 17 wherein said opening of the switch device comprises operating the switch to achieve a step reduction in the voltage actually applied to the heater from the power supply, the step reduction governed by the relationship where V ave is a heater rated voltage, N is a frequency of the input power supply, and t is a predetermined time period for over-voltage compensation.
19. A method for operating a clothes dryer to avoid tripping of a circuit breaker rated at a threshold voltage for an alternating current power supply, the dryer including an electrical heater, a voltage converter adapted for generating a DC
voltage reference signal corresponding to the actual voltage across the heater, a switch device for regulating a power supply input to the heater through operation of the switch, and a controller coupled to the voltage converter and to the switch device, said method comprising:
closing the switch device to energize the heater;
comparing the DC voltage reference signal to a voltage threshold that corresponds to a rated voltage of the heater minus an over-voltage compensation value;
when the DC voltage reference signal is greater than the voltage step differential, opening the switch device to disconnect the heater from the power supply and reduce an effective voltage applied to the heater through the switch device by one voltage step, the voltage step defined by the relationship where V ave is a heater rated voltage, N is a frequency of the input power supply, and t is a predetermined time period for over-voltage compensation;
closing the switch device for a remainder of time t to connect the power supply to the heater; and repeating opening of the switch device to achieve step reduction of voltage cycles to the heater upon the occurrence of every t time period.
voltage reference signal corresponding to the actual voltage across the heater, a switch device for regulating a power supply input to the heater through operation of the switch, and a controller coupled to the voltage converter and to the switch device, said method comprising:
closing the switch device to energize the heater;
comparing the DC voltage reference signal to a voltage threshold that corresponds to a rated voltage of the heater minus an over-voltage compensation value;
when the DC voltage reference signal is greater than the voltage step differential, opening the switch device to disconnect the heater from the power supply and reduce an effective voltage applied to the heater through the switch device by one voltage step, the voltage step defined by the relationship where V ave is a heater rated voltage, N is a frequency of the input power supply, and t is a predetermined time period for over-voltage compensation;
closing the switch device for a remainder of time t to connect the power supply to the heater; and repeating opening of the switch device to achieve step reduction of voltage cycles to the heater upon the occurrence of every t time period.
20. A method in accordance with Claim 19 further comprising:
continuing to compare the DC voltage reference signal to a predetermined reference voltage signal that corresponds to the rated voltage of the circuit breaker; and when the DC voltage reference signal is again greater than the predetermined threshold voltage, opening the switch device to disconnect the heater from the power supply and reduce an effective voltage applied to the heater through the switch device by an additional voltage step.
continuing to compare the DC voltage reference signal to a predetermined reference voltage signal that corresponds to the rated voltage of the circuit breaker; and when the DC voltage reference signal is again greater than the predetermined threshold voltage, opening the switch device to disconnect the heater from the power supply and reduce an effective voltage applied to the heater through the switch device by an additional voltage step.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/317,968 US6995965B2 (en) | 2002-12-12 | 2002-12-12 | Clothes dryer over-voltage control apparatus and method |
| US10/317,968 | 2002-12-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2430471A1 true CA2430471A1 (en) | 2004-06-12 |
| CA2430471C CA2430471C (en) | 2010-08-10 |
Family
ID=32506258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2430471A Expired - Lifetime CA2430471C (en) | 2002-12-12 | 2003-05-29 | Clothes dryer over-voltage control apparatus and method |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US6995965B2 (en) |
| CA (1) | CA2430471C (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8210047B2 (en) | 1996-01-23 | 2012-07-03 | En-Gauge, Inc. | Remote fire extinguisher station inspection |
| US7627960B2 (en) * | 2003-06-30 | 2009-12-08 | General Electric Company | Clothes dryer drum projections |
| KR101093878B1 (en) * | 2004-06-05 | 2011-12-13 | 엘지전자 주식회사 | A drum apparatus of a dryer |
| DE102004031395A1 (en) * | 2004-06-29 | 2006-02-02 | Infineon Technologies Ag | DC converter |
| US7438216B2 (en) * | 2005-05-10 | 2008-10-21 | Siemens Medical Solutions Usa, Inc. | Medical information access and processing system |
| US8156660B2 (en) * | 2005-09-22 | 2012-04-17 | Whirlpool Corporation | Apparatus and method for drying clothes |
| US20070256322A1 (en) * | 2006-04-27 | 2007-11-08 | Daewoo Electronics Corporation | Dryer having heater-installed suction duct |
| KR100793800B1 (en) * | 2006-06-30 | 2008-01-11 | 엘지전자 주식회사 | Washing machine and control method of steam generator for the same |
| DE602006017056D1 (en) * | 2006-07-06 | 2010-11-04 | Candy Spa | Drum for a washing machine, a washer-dryer and the like |
| US9249539B2 (en) * | 2006-09-25 | 2016-02-02 | Ecolab Inc. | Determination of dryness of textiles in a dryer |
| DE102007046068B4 (en) * | 2006-10-02 | 2018-06-28 | Lg Electronics Inc. | Device for detecting a belt separation in a dryer and method for detecting this process |
| KR101308510B1 (en) * | 2007-11-05 | 2013-09-12 | 동부대우전자 주식회사 | Dryer having indrawn tube with heater |
| KR101256145B1 (en) * | 2007-11-05 | 2013-04-23 | 동부대우전자 주식회사 | Dryer having indrawn tube with heater |
| WO2009077301A1 (en) * | 2007-12-17 | 2009-06-25 | Arcelik Anonim Sirketi | A dryer |
| US8981927B2 (en) | 2008-02-13 | 2015-03-17 | En-Gauge, Inc. | Object Tracking with emergency equipment |
| US8749373B2 (en) * | 2008-02-13 | 2014-06-10 | En-Gauge, Inc. | Emergency equipment power sources |
| DE102010028569A1 (en) * | 2010-05-04 | 2011-11-10 | BSH Bosch und Siemens Hausgeräte GmbH | Home appliance and method for operating a household appliance |
| US9027258B2 (en) * | 2010-10-21 | 2015-05-12 | Whirlpool Corporation | Laundry treating appliance with controlled cycle time |
| US8441248B2 (en) | 2010-10-21 | 2013-05-14 | Whirlpool Corporation | Laundry treating appliance with voltage detection |
| US8782922B2 (en) | 2010-11-24 | 2014-07-22 | Ecolab Usa Inc. | Dryer monitoring |
| US9041534B2 (en) | 2011-01-26 | 2015-05-26 | En-Gauge, Inc. | Fluid container resource management |
| US9206543B2 (en) | 2011-10-14 | 2015-12-08 | Ecolab Usa Inc. | Dryer monitoring |
| KR20150037881A (en) * | 2012-08-03 | 2015-04-08 | 에스이아이 옵티프론티어 가부시키가이샤 | Heat treatment device for optical fiber reinforcing member, optical fiber fusion splicer provided with same heat treatment device, and method for heat treating optical fiber reinforcing member |
| JP6081274B2 (en) * | 2013-04-05 | 2017-02-15 | 東芝ライフスタイル株式会社 | Motor control device for washing machine and protection method for motor control device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225765A (en) * | 1984-08-15 | 1993-07-06 | Michael Callahan | Inductorless controlled transition and other light dimmers |
| US4809128A (en) * | 1987-06-23 | 1989-02-28 | Robertshaw Controls Company | Heating element operating unit and method |
| US4859926A (en) * | 1988-01-19 | 1989-08-22 | Impact Systems, Inc. | Power controller for heater load |
| DE19708867A1 (en) * | 1997-03-05 | 1998-09-10 | Bosch Gmbh Robert | Circuit for temperature-dependent regulation of the heating current of seat heaters |
| US6137702A (en) * | 1999-05-03 | 2000-10-24 | Semiconductor Components Industries, Llc | Circuit and method of activating and de-activating a switching regulator at any point in a regulation cycle |
| US6188208B1 (en) * | 1999-08-02 | 2001-02-13 | General Electric Company | Cycle-skipping power control for AC line-powered loads |
| US6271506B1 (en) * | 1999-11-03 | 2001-08-07 | General Electric Company | Wide voltage range control for an electric resistance heater |
| JP3870648B2 (en) * | 2000-01-26 | 2007-01-24 | 松下電工株式会社 | AC power control method and apparatus |
| US6765180B2 (en) * | 2002-12-22 | 2004-07-20 | General Electric Company | Cycle skipping power control method and apparatus |
-
2002
- 2002-12-12 US US10/317,968 patent/US6995965B2/en not_active Expired - Lifetime
-
2003
- 2003-05-29 CA CA2430471A patent/CA2430471C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2430471C (en) | 2010-08-10 |
| US6995965B2 (en) | 2006-02-07 |
| US20040123486A1 (en) | 2004-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2430471A1 (en) | Clothes dryer over-voltage control apparatus and method | |
| US6134901A (en) | Method of speed control of compressor and control arrangement using the method | |
| US20110234255A1 (en) | Fault detection circuits for switched mode power supplies and related methods of operation | |
| CA3000877C (en) | Electronic circuit breaker | |
| KR20070103476A (en) | Active current surge limiters | |
| JP2010246369A (en) | Motor device and method of operating motor device | |
| KR0156695B1 (en) | Operating control device and method of airconditioner | |
| KR20070030073A (en) | Driving device of inverter air-conditioner and its control method | |
| JPH05168248A (en) | Air-conditioner | |
| JP2009178035A (en) | System with flicker control mechanism and method to reduce flickers occurring from the system | |
| CN109915403B (en) | Method for controlling voltage applied to electric fan | |
| JP3284961B2 (en) | Induction heating cooker | |
| US8432122B2 (en) | Method and device for starting single-phase asynchronous motors | |
| KR101455782B1 (en) | Arc Free Phase Control Alternatives for AC Motor Starter | |
| GB2415796A (en) | Regulating switching power supply frequency dependant on computer operating status | |
| JP2836884B2 (en) | Inverter device | |
| EP1282938B1 (en) | Motor energisation control circuit | |
| CN210428166U (en) | Noise reduction control device and household appliance | |
| CN110571934B (en) | Control method of switching device, switching device and power utilization system | |
| JP4336132B2 (en) | Water level sensorless single phase induction motor pump drought driving prevention device | |
| US6137242A (en) | Circuit for regulating output power source according to the different open-circuit time of input AC power source and the method thereof | |
| KR200213364Y1 (en) | Inverter overload detection device of elevator | |
| KR100309737B1 (en) | Apparatus and method for controlling fan motor speed for air conditioner | |
| JPH01222652A (en) | Cooling device for electronic equipment | |
| KR950014758B1 (en) | Control circuit and method of im |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20230529 |