WO2015092648A1 - Firefighting device for a household appliance, and household appliance incorporating said device - Google Patents

Firefighting device for a household appliance, and household appliance incorporating said device Download PDF

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Publication number
WO2015092648A1
WO2015092648A1 PCT/IB2014/066909 IB2014066909W WO2015092648A1 WO 2015092648 A1 WO2015092648 A1 WO 2015092648A1 IB 2014066909 W IB2014066909 W IB 2014066909W WO 2015092648 A1 WO2015092648 A1 WO 2015092648A1
Authority
WO
WIPO (PCT)
Prior art keywords
household appliance
tub
water
evw
firefighting
Prior art date
Application number
PCT/IB2014/066909
Other languages
French (fr)
Inventor
Andrea Cesaroni
Lucio PERELLI
Original Assignee
Indesit Company S.P.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Indesit Company S.P.A. filed Critical Indesit Company S.P.A.
Publication of WO2015092648A1 publication Critical patent/WO2015092648A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C3/00Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00Control of operations performed in washing machines or washer-dryers 
    • D06F33/30Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00Control of operations performed in washing machines or washer-dryers 
    • D06F33/50Control of washer-dryers characterised by the purpose or target of the control
    • D06F33/74Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/16Washing liquid temperature
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28Air properties
    • D06F2103/32Temperature
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02Water supply
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F25/00Washing 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 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08Liquid supply or discharge arrangements
    • D06F39/088Liquid supply arrangements
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/32Control of operations performed in domestic laundry dryers 
    • D06F58/34Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/50Responding to irregular working conditions, e.g. malfunctioning of blowers

Definitions

  • the present invention relates to a firefighting device for a household appliance, particularly a washing or
  • the possible risks also include those related to the probability of causing a fire.
  • a fire might break out inside household appliances such as washing or washing/drying machines, and inside the drum adapted to contain laundry or the like to be washed and dried.
  • Firefighting devices are known in the art which are adapted to fight a fire developing outside household appliances, e.g. as described in WO-2013/051949-A2, by spraying water or steam around the outside of the appliance. Said devices are not adapted to intervene in the event of a fire developing inside the household appliance.
  • the present invention relates to a firefighting device adapted for use in a laundry washing or washing/drying household appliance, said household appliance comprising an internal tub adapted to contain water, the device comprising:
  • an electromechanical actuator adapted to either enable or stop the supply of water into the tub through said hydraulic duct;
  • an electromechanical switch adapted to detect the temperature inside the tub and to control said electromechanical actuator in such a way as to enable the supply of water upon detection of a temperature exceeding a first threshold, and to stop the supply of water upon detection of a temperature below a second threshold, which is lower than said first threshold;
  • said electromechanical switch and electromechanical actuator being electrically connected to an electric input connection of the appliance.
  • Figure 1 shows a general circuit diagram of a first variant of the device according to the invention
  • Figure 2 shows a general circuit diagram of a second variant of the device according to the invention
  • Figure 3 shows an example of application of the device to a drum of a household appliance, with an enlarged detail thereof .
  • the device of the invention comprises means adapted to give a warning about an increase in the temperature inside the tub, and hence inside the drum (which normally contains laundry) of the household appliance, in particular a washing or washing/drying machine, above a first threshold value, and adapted to cause water to be supplied into the drum in order to extinguish a fire that might have been generated.
  • Said means are activated independently of any control or operating state of the appliance, and therefore even when the appliance is off or in standby, provided that it is connected to an electric power network, or when the drum door is open.
  • the water supply is interrupted as soon as the temperature inside the tub falls below a second threshold value, lower than the first one.
  • the appliance has a pair of power terminals, i.e. line L and neutral N, for connection to a household power socket, preferably through a noise filter, which is typically integrated into the appliance itself.
  • the appliance is normally equipped with a system for supplying water into the tub C (Fig. 3), comprising an electromechanical actuator, e.g. a solenoid valve EVW that, when open, allows water to be fed into a hydraulic duct leading to the tub inlet.
  • the solenoid valve is controlled by an electronic switch, e.g. a TRIAC TR, which receives an activation or deactivation signal at the gate terminal G and causes a flow of activation current for opening the solenoid valve EVW.
  • This system is controlled by an electronic circuit MB, which is normally adapted to control the operation of the household appliance.
  • an electromechanical switch THF detects the temperature inside the tub: for example, it may be a thermostat adapted to close the electric connection when it detects a temperature exceeding a first threshold, and to open said connection when it detects a temperature below a second threshold, lower than the first one.
  • the solenoid valve EVW is electrically connected to the line terminal L on one side and to the TRIAC TR on the other side.
  • the switch THF is connected to the neutral terminal N on one side and, on the other side, directly to the solenoid valve EVW at the node where it connects to the TRIAC.
  • the switch THF When its electric connection closes, the switch THF will cause current to flow into the solenoid valve EVW, which will then open the hydraulic duct in order to supply water into the tub and into the drum. This will happen independently of the operating condition of the household appliance, since the electric circuit that comprises the switch THF and the solenoid valve EVW will be closed directly at the power terminals L and N. The only condition that must be met is that the power cable of the appliance must be connected to the household power socket.
  • the firefighting device of the invention uses, in this example of embodiment, the existing hydraulic circuit to determine a supply of water into the tub C when a fire condition arises, since it is already in a position suitable for this purpose.
  • the water supply is interrupted when the temperature detected by the electromechanical switch falls below the second threshold, in which condition it can be presumed that the fire has been extinguished through the effect of the presence of water in the tub, thus avoiding the supply of excess water.
  • the switch THF may be an electromechanical thermostat applied to the tub C (Fig. 3), which detects the temperature inside the tub, e.g. with a first temperature threshold at 90 °C and a second one at 40 °C.
  • an independent circuit is arranged which is solely dedicated to the firefighting function, and which comprises the electromechanical switch THF and an additional solenoid valve EVA.
  • the electric circuit comprising the switch THF and the additional solenoid valve EVA connects directly to the power terminals L and N of the appliance.
  • the additional solenoid valve EVA may, for example, take water directly from the water intake point of the appliance.
  • the solenoid valve EVW which is normally already included in the appliance, is not involved in the firefighting function. Due to the provision of a specific hydraulic duct TU, the position of the latter can be optimized in a manner such that the water supplied into the tub will be particularly effective in extinguishing a fire.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing Compositions (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

A firefighting device is described, which is adapted for use in a laundry washing or washing/drying household appliance, said household appliance comprising an internal tub adapted to contain water, the device comprising: - a hydraulic duct (TU) adapted to supply water into the tub (C) for said firefighting function; - an electromechanical actuator (EVW, EVA) adapted to either enable or stop the supply of water into the tub through said hydraulic duct (TU); - an electromechanical switch (THF) adapted to detect the temperature inside the tub and to control said electromechanical actuator (EVW, EVA) in such a way as to enable the supply of water upon detection of a temperature exceeding a first threshold, and to stop the supply of water upon detection of a temperature below a second threshold, which is lower than said first threshold; - said electromechanical switch (THF) and electromechanical actuator (EVW, EVA) being electrically connected to an electric input connection of the appliance.

Description

"Firefighting device for a household appliance, and household appliance incorporating said device"
DESCRIPTION
Field of the invention
The present invention relates to a firefighting device for a household appliance, particularly a washing or
washing/drying machine, and to a household appliance
incorporating said device.
Background art
The problems related to the safety of household appliances are much felt, and are also taken much into consideration by standards issued by national and international standardization bodies, compelling manufacturers to adopt technical solutions that minimize the risks for people and things that might ensue from the use of such appliances.
The possible risks also include those related to the probability of causing a fire. In particular, there is a possibility that a fire might break out inside household appliances such as washing or washing/drying machines, and inside the drum adapted to contain laundry or the like to be washed and dried.
Firefighting devices are known in the art which are adapted to fight a fire developing outside household appliances, e.g. as described in WO-2013/051949-A2, by spraying water or steam around the outside of the appliance. Said devices are not adapted to intervene in the event of a fire developing inside the household appliance.
Therefore, a need arises for solving the above-mentioned problems .
Summary of the invention
It is therefore an object of the present invention to provide a firefighting device for a household appliance, as well as a household appliance incorporating said device, which are aimed ad solving the above-mentioned problems.
The present invention relates to a firefighting device adapted for use in a laundry washing or washing/drying household appliance, said household appliance comprising an internal tub adapted to contain water, the device comprising:
- a hydraulic duct adapted to supply water into the tub for said firefighting function;
- an electromechanical actuator adapted to either enable or stop the supply of water into the tub through said hydraulic duct;
an electromechanical switch adapted to detect the temperature inside the tub and to control said electromechanical actuator in such a way as to enable the supply of water upon detection of a temperature exceeding a first threshold, and to stop the supply of water upon detection of a temperature below a second threshold, which is lower than said first threshold;
said electromechanical switch and electromechanical actuator being electrically connected to an electric input connection of the appliance.
It is a particular object of the present invention to provide a firefighting device for a household appliance, and a household appliance incorporating said device, as set out in the claims, which are an integral part of the present description.
Brief description of the drawings
Further objects and advantages of the present invention will become apparent from the following detailed description of a preferred embodiment (and variants) thereof referring to the annexed drawings, which are only supplied by way of non- limiting example, wherein:
Figure 1 shows a general circuit diagram of a first variant of the device according to the invention;
Figure 2 shows a general circuit diagram of a second variant of the device according to the invention; Figure 3 shows an example of application of the device to a drum of a household appliance, with an enlarged detail thereof .
In the drawings, the same reference numerals and letters identify the same items or components.
Detailed description of some embodiments of the invention
The device of the invention comprises means adapted to give a warning about an increase in the temperature inside the tub, and hence inside the drum (which normally contains laundry) of the household appliance, in particular a washing or washing/drying machine, above a first threshold value, and adapted to cause water to be supplied into the drum in order to extinguish a fire that might have been generated. Said means are activated independently of any control or operating state of the appliance, and therefore even when the appliance is off or in standby, provided that it is connected to an electric power network, or when the drum door is open. The water supply is interrupted as soon as the temperature inside the tub falls below a second threshold value, lower than the first one.
The following will describe some examples of embodiment of the invention.
The appliance has a pair of power terminals, i.e. line L and neutral N, for connection to a household power socket, preferably through a noise filter, which is typically integrated into the appliance itself.
Also, the appliance is normally equipped with a system for supplying water into the tub C (Fig. 3), comprising an electromechanical actuator, e.g. a solenoid valve EVW that, when open, allows water to be fed into a hydraulic duct leading to the tub inlet. The solenoid valve is controlled by an electronic switch, e.g. a TRIAC TR, which receives an activation or deactivation signal at the gate terminal G and causes a flow of activation current for opening the solenoid valve EVW. This system is controlled by an electronic circuit MB, which is normally adapted to control the operation of the household appliance.
In a first example of embodiment of the device according to the invention (Fig. 1), an electromechanical switch THF detects the temperature inside the tub: for example, it may be a thermostat adapted to close the electric connection when it detects a temperature exceeding a first threshold, and to open said connection when it detects a temperature below a second threshold, lower than the first one.
In this case, the solenoid valve EVW is electrically connected to the line terminal L on one side and to the TRIAC TR on the other side. The switch THF is connected to the neutral terminal N on one side and, on the other side, directly to the solenoid valve EVW at the node where it connects to the TRIAC.
When its electric connection closes, the switch THF will cause current to flow into the solenoid valve EVW, which will then open the hydraulic duct in order to supply water into the tub and into the drum. This will happen independently of the operating condition of the household appliance, since the electric circuit that comprises the switch THF and the solenoid valve EVW will be closed directly at the power terminals L and N. The only condition that must be met is that the power cable of the appliance must be connected to the household power socket.
Therefore, the firefighting device of the invention uses, in this example of embodiment, the existing hydraulic circuit to determine a supply of water into the tub C when a fire condition arises, since it is already in a position suitable for this purpose.
The water supply is interrupted when the temperature detected by the electromechanical switch falls below the second threshold, in which condition it can be presumed that the fire has been extinguished through the effect of the presence of water in the tub, thus avoiding the supply of excess water.
The switch THF may be an electromechanical thermostat applied to the tub C (Fig. 3), which detects the temperature inside the tub, e.g. with a first temperature threshold at 90 °C and a second one at 40 °C.
In a second example of embodiment of the device of the invention (Figs. 2 and 3), an independent circuit is arranged which is solely dedicated to the firefighting function, and which comprises the electromechanical switch THF and an additional solenoid valve EVA. The electric circuit comprising the switch THF and the additional solenoid valve EVA connects directly to the power terminals L and N of the appliance. There is also a specific hydraulic duct TU controlled by the solenoid valve EVA for supplying water into the tub C, which water is sprayed into the drum, preferably from above. The additional solenoid valve EVA may, for example, take water directly from the water intake point of the appliance.
In this case, the solenoid valve EVW, which is normally already included in the appliance, is not involved in the firefighting function. Due to the provision of a specific hydraulic duct TU, the position of the latter can be optimized in a manner such that the water supplied into the tub will be particularly effective in extinguishing a fire.
The above-described example of embodiment may be subject to variations without departing from the protection scope of the present invention, including all equivalent designs known to a man skilled in the art.
The elements and features shown in the various preferred embodiments may be combined together without however departing from the protection scope of the present invention.
The advantages that are attained by the present invention are apparent .
Most importantly, it provides a low-cost firefighting device which is integrated into the appliance. From the above description, those skilled in the art will be able to produce the object of the invention without introducing any further construction details.

Claims

1. A firefighting device adapted for use in a laundry washing or washing/drying household appliance, said household appliance comprising an internal tub adapted to contain water, the device comprising:
- a hydraulic duct (TU) adapted to supply water into the tub C) for said firefighting function;
- an electromechanical actuator (EVW, EVA) adapted to either enable or stop the supply of water into the tub through said hydraulic duct (TU) ;
- an electromechanical switch (THF) adapted to detect the temperature inside the tub and to control said electromechanical actuator (EVW, EVA) in such a way as to enable the supply of water upon detection of a temperature exceeding a first threshold, and to stop the supply of water upon detection of a temperature below a second threshold, which is lower than said first threshold;
said electromechanical actuator (EVW, EVA) and electromechanical switch (THF) being electrically connected to an electric input connection of the appliance.
2. A firefighting device as claimed in claim 1, wherein said household appliance is equipped with a first solenoid valve (EVW) for supplying wash water into said tub (C) through said hydraulic duct (TU) , and said electromechanical actuator is said first solenoid valve.
3. A firefighting device as claimed in claim 1, wherein said household appliance is equipped with a first solenoid valve (EVW) for supplying wash water into said tub (C) , said electromechanical actuator is a second solenoid valve (EVA) , and said hydraulic duct (TU) is independent of a hydraulic duct for said wash water.
4. A firefighting device as claimed in claim 1, wherein said electromechanical switch (THF) is an electromechanical thermostat applied to said tub (C) and electrically connected to said electromechanical actuator.
5. A firefighting device as claimed in claim 1, wherein said first temperature threshold is such that it detects a fire condition within the household appliance, and said second temperature threshold detects an end-of-fire condition within the household appliance.
6. A washing or washing/drying household appliance comprising a firefighting device as claimed in any one of the preceding claims.
PCT/IB2014/066909 2013-12-19 2014-12-15 Firefighting device for a household appliance, and household appliance incorporating said device WO2015092648A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2013A001042 2013-12-19
IT001042A ITTO20131042A1 (en) 2013-12-19 2013-12-19 FIRE-FIGHTING DEVICE FOR APPLIANCES, AND APPLIANCE APPLIANCES INCORPORATING THE DEVICE

Publications (1)

Publication Number Publication Date
WO2015092648A1 true WO2015092648A1 (en) 2015-06-25

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ID=50159435

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/066909 WO2015092648A1 (en) 2013-12-19 2014-12-15 Firefighting device for a household appliance, and household appliance incorporating said device

Country Status (2)

Country Link
IT (1) ITTO20131042A1 (en)
WO (1) WO2015092648A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9359706B2 (en) 2014-10-24 2016-06-07 WNL Inc. Fire containment system for vented clothes dryer appliance
CN106854826A (en) * 2015-12-09 2017-06-16 无锡小天鹅股份有限公司 Dryer and its control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050023008A1 (en) * 2003-06-13 2005-02-03 Alliance Laundry Systems Llc System and method for testing a fire suppression system in a clothes dryer
EP2072659A1 (en) * 2007-12-20 2009-06-24 BSH Bosch und Siemens Hausgeräte GmbH Laundry drying device and method for operating same
US20100175898A1 (en) * 2007-04-12 2010-07-15 Aktiebolaget Electrolux Fire protection system for a clothes dryer
WO2013051949A2 (en) 2011-10-07 2013-04-11 Sensorjet Holdings Limited A fire retarding appliance and system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050023008A1 (en) * 2003-06-13 2005-02-03 Alliance Laundry Systems Llc System and method for testing a fire suppression system in a clothes dryer
US20100175898A1 (en) * 2007-04-12 2010-07-15 Aktiebolaget Electrolux Fire protection system for a clothes dryer
EP2072659A1 (en) * 2007-12-20 2009-06-24 BSH Bosch und Siemens Hausgeräte GmbH Laundry drying device and method for operating same
WO2013051949A2 (en) 2011-10-07 2013-04-11 Sensorjet Holdings Limited A fire retarding appliance and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9359706B2 (en) 2014-10-24 2016-06-07 WNL Inc. Fire containment system for vented clothes dryer appliance
CN106854826A (en) * 2015-12-09 2017-06-16 无锡小天鹅股份有限公司 Dryer and its control method

Also Published As

Publication number Publication date
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