EP3642407A1 - Method and device for dosing water in a steam chamber - Google Patents

Method and device for dosing water in a steam chamber

Info

Publication number
EP3642407A1
EP3642407A1 EP18730751.7A EP18730751A EP3642407A1 EP 3642407 A1 EP3642407 A1 EP 3642407A1 EP 18730751 A EP18730751 A EP 18730751A EP 3642407 A1 EP3642407 A1 EP 3642407A1
Authority
EP
European Patent Office
Prior art keywords
values
duration
flow rate
range
previous
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
Application number
EP18730751.7A
Other languages
German (de)
French (fr)
Other versions
EP3642407B1 (en
Inventor
Sivakami ANNAMALAI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Publication of EP3642407A1 publication Critical patent/EP3642407A1/en
Application granted granted Critical
Publication of EP3642407B1 publication Critical patent/EP3642407B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/14—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron
    • D06F75/18—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron the water being fed slowly, e.g. drop by drop, from the reservoir to a steam generator
    • 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
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/12—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water supplied to the iron from an external source
    • 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
    • D06F75/00—Hand irons
    • D06F75/08—Hand irons internally heated by electricity
    • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
    • D06F75/14—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron

Definitions

  • the invention relates to a method and device for dosing water in a steam chamber.
  • the invention may be used in the field of garment care.
  • the ironing steam rates for such irons are rather low in view that limited water is dosed into the steam chamber to avoid water accumulation and splashing in steam chamber.
  • Another type of device comprises a base connected to an iron via a hose.
  • a trigger When user wants steam to be generated by the device, user activates a trigger so that water is pumped into the steam chamber of the iron by an electrical water pump.
  • Many of such systems are provided with an external base containing the water reservoir and the water pump. Water is thus carried from the base to the iron via the hose.
  • water reservoir and pump can be arranged in the iron housing itself in case the device is a hand-held device.
  • the iron has a relatively limited thermal mass, resulting in that the steam chamber of the iron quickly loses energy when water is dosed into, in particular if water flow rate is relatively high.
  • the steaming is thus quickly and significantly decreased over time because the steam chamber in the iron cannot maintain a sufficiently high temperature to allow water to evaporate quickly.
  • EP 2 952 624 Al relates to a method of controlling operation of a steam iron in which upon a switch being turned on a controller enables a first amount of steam per unit time to be ejected until a first time period has elapsed. After the first time period has elapsed, a second amount of steam per unit time is ejected, which is less than the first amount of steam per unit time.
  • Those devices have thus limitations in the sense that they cannot provide a powerful steam generation and sounding steam discharge over a relatively long period of time.
  • the method according to the invention is about controlling a garment care device, the garment care device comprising a steam chamber, a water pump, and a user trigger means to activate the water pump for dosing water in the steam chamber.
  • the method comprises the steps of:
  • This solution allows maximizing the water flow rate dosed into the steam chamber, by taking into account how the steam chamber has been used in the past, such as taking into account how much thermal energy has been accumulated in the steam chamber during a previous non- steaming period, and how much thermal energy has been dissipated by the steam chamber during a previous steaming period.
  • this solution allows obtaining a high steam generation repeatedly, and obtaining consistent steam generation every time steam is generated.
  • the invention also relates to a device comprising means to implement above method.
  • the invention also relates to a computer program comprising code instructions for carrying out the steps of the above method.
  • Fig.l depicts a high level flow chart of the method according to the invention
  • Fig.2 illustrates an example of the actuation/deactivation of a user trigger means along the time according to the invention
  • Fig.3 depicts a more detailed flow chart of the method according to the invention
  • Fig.4 depicts a flow chart of the method according to the invention according to a preferred mode
  • Fig.5 depicts a garment care device according to the invention.
  • Fig.1 depicts a high level flow chart of the method according to the invention.
  • the method is about controlling a garment care device comprising a steam chamber, a water pump, and a user trigger means to activate the water pump for dosing water in the steam chamber.
  • the method comprises the steps of:
  • the user trigger means corresponds to an electromechanical switch, a digital switch, or a touch-sensitive key arranged on the garment care device.
  • Fig.2 illustrates an example of the actuation/deactivation of a user trigger means along the time according to the invention.
  • the actuation/deactivation of the user trigger means is represented by two states:
  • a first state S 1 where the user trigger means is not activated by the user corresponds to a situation where no water is dosed in the steam chamber, resulting in no steam being generated by the steam chamber,
  • a second state S2 where the user trigger means is activated by the user corresponds to a situation where water is dosed in the steam chamber, resulting in steam being generated by the steam chamber,
  • Instant tO corresponds to the current time user actuates again the user trigger means with the goal that the device generates steam.
  • the previous OFF duration during which the user trigger means was not activated for the previous time is illustrated by the duration d_OFF.
  • the previous ON duration during which the user trigger means was activated for the previous time is illustrated by the duration d_ON.
  • the method according to the invention aims to determine the water flow rate for the water pump starting from the current time tO.
  • Fig.3 depicts a more detailed flow chart of the method according to the invention. This flow chart further details what is performed in the step of determining 101 of Fig.1.
  • the step of determining (101) comprises a step of comparing (301) the previous OFF duration (d_OFF) to a first duration threshold (TH1).
  • conditional check on the previous ON duration (d_ON) is illustrated by the decision block 303.
  • the values in the first range of values (Rl) are larger than values in the second range of values (R2).
  • Fig.4 depicts a flow chart of the method according to the invention according to a preferred mode. This flow chart is based on the flow chart of Fig.3. In addition to the flow chart of Fig.3, it is planned that if the previous OFF duration (d_OFF) is larger than said first duration threshold (TH1), there is a step of associating (401) to the water flow rate a value selected in the first range of values (Rl).
  • the conditional check on the previous OFF duration (d_OFF) is illustrated by the decision block 402.
  • the decision block 402. Preferably, if the user trigger means is continuously activated, and if the previous OFF duration (d_OFF) is larger than the first duration threshold (TH1), there is a step of associating (601) to the water flow rate a value selected in the first range of values (Rl) for a first duration (Dl) which is at the maximum equal to said second duration threshold (TH2).
  • the step of associating (601) is not illustrated in the figures.
  • the user trigger means is continuously activated, and if the previous ON duration (d_ON) is shorter than said second duration threshold (TH2), associating (602) to the water flow rate a value selected in the first range of values (Rl) for a second duration (D2) which is at the maximum equal to the difference between said second duration threshold (TH2) and said previous ON duration (d_ON).
  • the step of associating (602) is not illustrated on a flow chart.
  • the user trigger means is continuously activated, and if said first duration (Dl) has elapsed or said second duration (D2) has elapsed, there is a step of associating (603) to the water flow rate a value selected in a third range of values (R3).
  • the step of associating (603) is not illustrated on a flow chart.
  • the values in the third range of values (R3) are smaller than values in the second range of values (R2).
  • step 603 if the user trigger means is continuously activated after the method has entered in step 603, and after the water pump has been actuated with values of flow rate from said third range of values (R3) for more than a predetermined third duration (D3), there is a step of associating (604) to the water flow rate a value selected in the second range of values (R2).
  • the step of associating (604) is not illustrated on a flow chart.
  • the third range of values (R3) has null values. This means that the water pump is stopped. This means that in the situation where the steam is requested by user for a relatively long period of time, the water flow rate is restricted to a lower level (or even stopped totally) for a predetermined period of time. The steam chamber can thus accumulate thermal energy again faster. This phase is followed by a flow rate with moderated values to achieve continuous and consistent steam.
  • Table la is an example of a table linking values of water flow rate to be associated to the water pump, sorted along the time.
  • Rl Xi is a value of a water flow rate in the first range of values (Rl).
  • index i equals 6, 7 or 8.
  • Rl Xi has value in the range [80 g/mn; 200 g/mn].
  • R2_Xi is a value of a water flow rate in the second range of values (R2). In this example, index i equals 6 or 7. For example, R2_Xi has value in the range [20 g/mn; 79 g/mn].
  • R3_Xi is a value of a water flow rate in the third range of values (R3). In this example, index equals 6. For example, R3_Xi has value in the range [0 g/mn; 19 g/mn].
  • T(i+1) - T(i) corresponds to a time duration during which a certain value is associated to the water flow rate.
  • the difference T(i+1) - T(i) is equal to 1 second.
  • the first range of values (Rl), the second range of values (R2), and the third range of values (R3) are thus arranged in tables containing values of water flow rate sorted along the time.
  • the values of water flow rate are decreasing when the time is incrementing.
  • R1 X6 is larger than R1 X7
  • R2 X6 is larger than R2 X7.
  • the values of water flow rate are kept constant when the time is incrementing.
  • the values of water flow rate are increasing when the time is incrementing.
  • the previous OFF duration (d_OFF) is compared to the first duration threshold TH1.
  • the water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl). This corresponds to step 304.
  • the water flow rate value Rl Xi corresponds to the value at the time starting before a given duration from the end of the first range of values (Rl), said given duration corresponding to the difference between the second duration threshold (TH2) and the previous ON duration (d_ON), i.e.
  • (TH2 - d_ON) 1 second before the end of the first range of values (Rl), which corresponds to time interval T5 to T6.
  • An illustration of this scenario is provided in below Table 3 a.
  • the water pump is activated with a water flow rate value R2_Xi from the second range of values (R2), which is associated with the initial time T8 to T9. This corresponds to step 305.
  • An illustration of this scenario is provided in below Table 4a.
  • water flow rate values will continue to be selected from the second range of values (R2). If the end of the second range of values (R2) is reached, a by-default value can be continued to be associated.
  • the water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl), which is associated with the initial time Tl to T2. In this case, it corresponds to the water flow rate value R1 X6. This corresponds to step 401.
  • An illustration of this scenario is provided in below Table 5 a.
  • the water pump is associated with water flow rate R1 X8 during time interval T5 and T6, the water flow rate is associated to value R3 X6.
  • Table 2a The following Table 3a is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
  • Table 4a is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means.
  • the associated values are underlined.
  • Table 5a is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means.
  • the associated values are underlined.
  • the step of determining (101) is further based on the current temperature of the steam chamber.
  • Table lb is an example of look-up table linking the temperature of the steam chamber with values of water flow rate to be associated to the water pump, sorted along the time.
  • Rl Xi is a value of a water flow rate in the first range of values (Rl).
  • index i equals 1, 2, 3, 4 or 5.
  • Rl_Xi has value in the range [80 g/mn; 200 g/mn].
  • R2_Xi is a value of a water flow rate in the second range of values (R2).
  • index i equals 1, 2, or 3.
  • R2_Xi has value in the range [20 g/mn; 79 g/mn].
  • R3_Xi is a value of a water flow rate in the third range of values (R3).
  • index i equals 1 or 2.
  • R3_Xi has value in the range [0 g/mn; 19 g/mn].
  • Temp i is a given temperature corresponding to the current temperature of the steam chamber.
  • Temp i is a given range of temperature in which the current temperature of the steam chamber is situated.
  • index i equals 1, 2, 3 or 4.
  • Temp_(i+1) is smaller than Temp (i).
  • T(i+1) - T(i) corresponds to a time duration during which a certain value is associated to the water flow rate, depending on the temperature (or temperature range) measured for the steam chamber.
  • the difference T(i+1) - T(i) is equal to 1 second.
  • the first range of values (Rl), the second range of values (R2), and the third range of values (R3) are thus arranged in look-up tables linking the temperature of the steam chamber with values of water flow rate sorted along the time.
  • the values of water flow rate are decreasing when the time is incrementing.
  • R1 X1 is larger than R1 X2
  • R2 X1 is larger than R2 X2
  • R3 X1 is larger than R3 X2.
  • the values of water flow rate are kept constant when the time is incrementing.
  • the values of water flow rate are increasing when the time is incrementing.
  • the values of water flow rate are decreasing when the temperature of the steam chamber is decreasing.
  • the values of water flow rate are kept constant when the temperature of the steam chamber is decreasing.
  • the previous OFF duration (d_OFF) is compared to the first duration threshold TH1.
  • the water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl), depending on the current temperature of the steam chamber. This corresponds to step 304.
  • Table 3b An illustration of this scenario is provided in below Table 3b.
  • the water pump is activated with a water flow rate value R2_Xi from the second range of values (R2), which is associated with the initial time T8 to T9, and depending on the current temperature of the steam chamber. This corresponds to step 305.
  • R2_Xi water flow rate value
  • water flow rate values will continue to be selected from the second range of values (R2). If the end of the second range of values (R2) is reached, a by-default value can be continued to be associated.
  • the water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl), which is associated with the initial time Tl to T2, and depending on the current temperature of the steam chamber. For example, if at that time the temperature of the steam chamber is Temp_(3), the water flow rate value R1 X2. This corresponds to step 401.
  • An illustration of this scenario is provided in below Table 5b.
  • the water pump is associated with water flow rate R1 X5 during time interval T5 and T6, with a temperature of the steam chamber Temp_(3), the water flow rate is associated to value R3 X1, assuming temperature of the steam chamber at the beginning of T6 is still Temp_(3).
  • Table 2b The following Table 3b is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
  • Table 4b is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means.
  • the associated values are underlined.
  • Table 5b is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means.
  • the associated values are underlined.
  • Table 5b Fig.5 depicts a garment care device 501 according to the invention.
  • the garment care device (501) comprises:
  • a base (504) connected via a hose (505) to the iron (502), the base (504) comprising a water tank (510) and a water pump (506),
  • a temperature sensor for measuring the temperature of the steam chamber (503)
  • a control unit comprising code instructions for carrying out the steps of the method described above.
  • the invention also relates to computer program comprising code instructions for carrying out the steps of the method described above.

Abstract

The invention relates to a method of controlling a garment care device. The garment care device comprises a steam chamber, a water pump, and a user trigger means to activate the water pump for dosing water in the steam chamber. The method comprising a step of determining (101), upon the user trigger means is activated, a water flow rate for the water pump, based on the previous OFF duration (d_OFF) during which the user trigger means was not activated for the previous time, the previous ON duration (d_ON) during which the user trigger means was activated for the previous time. The method also comprises a step of activating (102) the water pump with said water flow rate. This solution allows obtaining a high steam generation repeatedly, and to get consistent steam generation every time steam is generated.

Description

"Method and device for dosing water in a steam chamber"
FIELD OF THE INVENTION
The invention relates to a method and device for dosing water in a steam chamber. The invention may be used in the field of garment care.
BACKGROUND OF THE INVENTION
In a conventional steam iron, water is dosed into the steam chamber by gravity from a water reservoir built in the iron body. The water flows into the steam chamber and consequently the steam generation starts. The steam paths are typically short and designed with minimal obstruction for easy flow of water.
The ironing steam rates for such irons are rather low in view that limited water is dosed into the steam chamber to avoid water accumulation and splashing in steam chamber.
Another type of device comprises a base connected to an iron via a hose. When user wants steam to be generated by the device, user activates a trigger so that water is pumped into the steam chamber of the iron by an electrical water pump. Many of such systems are provided with an external base containing the water reservoir and the water pump. Water is thus carried from the base to the iron via the hose. Alternatively, water reservoir and pump can be arranged in the iron housing itself in case the device is a hand-held device.
In these types of devices, the iron has a relatively limited thermal mass, resulting in that the steam chamber of the iron quickly loses energy when water is dosed into, in particular if water flow rate is relatively high. The steaming is thus quickly and significantly decreased over time because the steam chamber in the iron cannot maintain a sufficiently high temperature to allow water to evaporate quickly.
EP 2 952 624 Al relates to a method of controlling operation of a steam iron in which upon a switch being turned on a controller enables a first amount of steam per unit time to be ejected until a first time period has elapsed. After the first time period has elapsed, a second amount of steam per unit time is ejected, which is less than the first amount of steam per unit time. Those devices have thus limitations in the sense that they cannot provide a powerful steam generation and sounding steam discharge over a relatively long period of time.
Moreover, if water is continued to be dosed into the steam chamber, water might accumulate in the steam chamber with the risk of water leakage.
OBJECT AND SUMMARY OF THE INVENTION
It is an object of the invention to propose an improved method of controlling a garment care device that avoids or mitigates above-mentioned problems. The invention is defined by the independent claims. The dependent claims define advantageous embodiments.
To this end, the method according to the invention is about controlling a garment care device, the garment care device comprising a steam chamber, a water pump, and a user trigger means to activate the water pump for dosing water in the steam chamber. The method comprises the steps of:
determining, upon the user trigger means is activated, a water flow rate for the water pump, based on:
a) the previous OFF duration during which the user trigger means was not activated for the previous time,
b) the previous ON duration during which the user trigger means was activated for the previous time,
activating the water pump with said water flow rate. This solution allows maximizing the water flow rate dosed into the steam chamber, by taking into account how the steam chamber has been used in the past, such as taking into account how much thermal energy has been accumulated in the steam chamber during a previous non- steaming period, and how much thermal energy has been dissipated by the steam chamber during a previous steaming period.
As a result, this solution allows obtaining a high steam generation repeatedly, and obtaining consistent steam generation every time steam is generated.
The invention also relates to a device comprising means to implement above method. The invention also relates to a computer program comprising code instructions for carrying out the steps of the above method.
Detailed explanations and other aspects of the invention will be given below. BRIEF DESCRIPTION OF THE DRAWINGS
Particular aspects of the invention will now be explained with reference to the embodiments described hereinafter and considered in connection with the accompanying drawings, in which identical parts or sub-steps are designated in the same manner :
Fig.l depicts a high level flow chart of the method according to the invention,
Fig.2 illustrates an example of the actuation/deactivation of a user trigger means along the time according to the invention,
Fig.3 depicts a more detailed flow chart of the method according to the invention, Fig.4 depicts a flow chart of the method according to the invention according to a preferred mode,
Fig.5 depicts a garment care device according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
Fig.1 depicts a high level flow chart of the method according to the invention.
The method is about controlling a garment care device comprising a steam chamber, a water pump, and a user trigger means to activate the water pump for dosing water in the steam chamber.
The method comprises the steps of:
determining (101), upon the user trigger means is activated, a water flow rate for the water pump, based on:
a) the previous OFF duration (d_OFF) during which the user trigger means was not activated for the previous time,
b) the previous ON duration (d_ON) during which the user trigger means was activated for the previous time,
activating (102) the water pump with said water flow rate.
For example, the user trigger means corresponds to an electromechanical switch, a digital switch, or a touch-sensitive key arranged on the garment care device. Fig.2 illustrates an example of the actuation/deactivation of a user trigger means along the time according to the invention.
The actuation/deactivation of the user trigger means is represented by two states:
a first state S 1 where the user trigger means is not activated by the user: this corresponds to a situation where no water is dosed in the steam chamber, resulting in no steam being generated by the steam chamber,
a second state S2 where the user trigger means is activated by the user: this corresponds to a situation where water is dosed in the steam chamber, resulting in steam being generated by the steam chamber,
Instant tO corresponds to the current time user actuates again the user trigger means with the goal that the device generates steam.
Compared to this current time tO, the previous OFF duration during which the user trigger means was not activated for the previous time is illustrated by the duration d_OFF.
Compared to this current time tO, the previous ON duration during which the user trigger means was activated for the previous time is illustrated by the duration d_ON.
The method according to the invention aims to determine the water flow rate for the water pump starting from the current time tO.
Fig.3 depicts a more detailed flow chart of the method according to the invention. This flow chart further details what is performed in the step of determining 101 of Fig.1.
The step of determining (101) comprises a step of comparing (301) the previous OFF duration (d_OFF) to a first duration threshold (TH1).
If the previous OFF duration (d_OFF) is shorter than the first duration threshold (TH1), there is a step of comparing (302) the previous ON duration (d_ON) to a second duration threshold (TH2).
If the previous ON duration (d_ON) is shorter than the second duration threshold (TH2), there is a step of associating (304) to the water flow rate a value selected in said first range of values (Rl). If the previous ON duration (d_ON) is larger than said second duration threshold (TH2), there is a step of associating (305) to the water flow rate a value selected in a second range of values (R2).
The conditional check on the previous ON duration (d_ON) is illustrated by the decision block 303.
The values in the first range of values (Rl) are larger than values in the second range of values (R2).
Fig.4 depicts a flow chart of the method according to the invention according to a preferred mode. This flow chart is based on the flow chart of Fig.3. In addition to the flow chart of Fig.3, it is planned that if the previous OFF duration (d_OFF) is larger than said first duration threshold (TH1), there is a step of associating (401) to the water flow rate a value selected in the first range of values (Rl).
The conditional check on the previous OFF duration (d_OFF) is illustrated by the decision block 402. Preferably, if the user trigger means is continuously activated, and if the previous OFF duration (d_OFF) is larger than the first duration threshold (TH1), there is a step of associating (601) to the water flow rate a value selected in the first range of values (Rl) for a first duration (Dl) which is at the maximum equal to said second duration threshold (TH2). The step of associating (601) is not illustrated in the figures.
Preferably, if the user trigger means is continuously activated, and if the previous ON duration (d_ON) is shorter than said second duration threshold (TH2), associating (602) to the water flow rate a value selected in the first range of values (Rl) for a second duration (D2) which is at the maximum equal to the difference between said second duration threshold (TH2) and said previous ON duration (d_ON). The step of associating (602) is not illustrated on a flow chart.
Preferably, if the user trigger means is continuously activated, and if said first duration (Dl) has elapsed or said second duration (D2) has elapsed, there is a step of associating (603) to the water flow rate a value selected in a third range of values (R3). The step of associating (603) is not illustrated on a flow chart.
The values in the third range of values (R3) are smaller than values in the second range of values (R2).
Preferably, if the user trigger means is continuously activated after the method has entered in step 603, and after the water pump has been actuated with values of flow rate from said third range of values (R3) for more than a predetermined third duration (D3), there is a step of associating (604) to the water flow rate a value selected in the second range of values (R2). The step of associating (604) is not illustrated on a flow chart.
Preferably, the third range of values (R3) has null values. This means that the water pump is stopped. This means that in the situation where the steam is requested by user for a relatively long period of time, the water flow rate is restricted to a lower level (or even stopped totally) for a predetermined period of time. The steam chamber can thus accumulate thermal energy again faster. This phase is followed by a flow rate with moderated values to achieve continuous and consistent steam.
More details and examples on the method according to the invention will now be provided.
Below Table la is an example of a table linking values of water flow rate to be associated to the water pump, sorted along the time.
Table la
Rl Xi is a value of a water flow rate in the first range of values (Rl). In this example, index i equals 6, 7 or 8. For example, Rl Xi has value in the range [80 g/mn; 200 g/mn].
R2_Xi is a value of a water flow rate in the second range of values (R2). In this example, index i equals 6 or 7. For example, R2_Xi has value in the range [20 g/mn; 79 g/mn]. R3_Xi is a value of a water flow rate in the third range of values (R3). In this example, index equals 6. For example, R3_Xi has value in the range [0 g/mn; 19 g/mn].
T(i+1) - T(i) corresponds to a time duration during which a certain value is associated to the water flow rate.
For example, the difference T(i+1) - T(i) is equal to 1 second.
The first range of values (Rl), the second range of values (R2), and the third range of values (R3) are thus arranged in tables containing values of water flow rate sorted along the time.
Preferably, the values of water flow rate are decreasing when the time is incrementing. For example, R1 X6 is larger than R1 X7, R2 X6 is larger than R2 X7.
Alternatively, the values of water flow rate are kept constant when the time is incrementing. Alternatively, the values of water flow rate are increasing when the time is incrementing.
As an example, let consider that the first duration threshold TH1 = 6 seconds, and that the second duration threshold TH2 = 5 seconds.
When at time tO the user activates the user trigger means, the previous OFF duration (d_OFF) is compared to the first duration threshold TH1.
The different following scenarios may happen:
Scenario la : The previous OFF duration (d_OFF) is shorter than the first duration thresho Id TH 1 , for example d_OFF = 3 seconds. The previous ON duration (d_ON) is shorter than the second duration threshold (TH2), for example d_ON = 4 seconds. The water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl). This corresponds to step 304. The water flow rate value Rl Xi corresponds to the value at the time starting before a given duration from the end of the first range of values (Rl), said given duration corresponding to the difference between the second duration threshold (TH2) and the previous ON duration (d_ON), i.e. (TH2 - d_ON) = 1 second before the end of the first range of values (Rl), which corresponds to time interval T5 to T6. An illustration of this scenario is provided in below Table 3 a. Scenario 2a : The previous OFF duration (d_OFF) is shorter than the first duration thresho Id TH 1 , for example d_OFF = 3 seconds. The previous ON duration (d_ON) is larger than said second duration threshold (TH2), for example d_ON = 6 seconds. The water pump is activated with a water flow rate value R2_Xi from the second range of values (R2), which is associated with the initial time T8 to T9. This corresponds to step 305. An illustration of this scenario is provided in below Table 4a.
It is noted that when the water pump is activated with water flow rate values from the second range of values (R2), and if user continuously activates the user trigger means, water flow rate values will continue to be selected from the second range of values (R2). If the end of the second range of values (R2) is reached, a by-default value can be continued to be associated.
Scenario 3a: The previous OFF duration (d_OFF) is larger (or equal to) than the first duration threshold TH1, for example d_OFF = 7 seconds. The water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl), which is associated with the initial time Tl to T2. In this case, it corresponds to the water flow rate value R1 X6. This corresponds to step 401. An illustration of this scenario is provided in below Table 5 a.
When the water pump is associated with water flow rate in the first range of values (Rl) and that the user continuously activates the user trigger means, this situation is continued until the end of the first range of values (Rl) is reached, so in the above example, when T6 is reached.
When the end of first range of values (Rl) is reached, the water pump is associated with water flow rate in the third range of values (R3).
In above example, if the water pump is associated with water flow rate R1 X8 during time interval T5 and T6, the water flow rate is associated to value R3 X6.
Below Table 2a is a numerical example of Table la.
Table 2a The following Table 3a is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
Table 3 a
The following Table 4a is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
Table 4a
The following Table 5a is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
Table 5 a Preferably, the step of determining (101) is further based on the current temperature of the steam chamber.
Taking into account the current temperature of the steam chamber helps to further adapt the determination of the water flow rate for the water pump.
Below Table lb is an example of look-up table linking the temperature of the steam chamber with values of water flow rate to be associated to the water pump, sorted along the time.
Table lb
Rl Xi is a value of a water flow rate in the first range of values (Rl). In this example, index i equals 1, 2, 3, 4 or 5. For example, Rl_Xi has value in the range [80 g/mn; 200 g/mn].
R2_Xi is a value of a water flow rate in the second range of values (R2). In this example, index i equals 1, 2, or 3. For example, R2_Xi has value in the range [20 g/mn; 79 g/mn].
R3_Xi is a value of a water flow rate in the third range of values (R3). In this example, index i equals 1 or 2. For example, R3_Xi has value in the range [0 g/mn; 19 g/mn].
Temp i is a given temperature corresponding to the current temperature of the steam chamber. Alternatively, Temp i is a given range of temperature in which the current temperature of the steam chamber is situated. In this example, index i equals 1, 2, 3 or 4.
For example, Temp_(i+1) is smaller than Temp (i).
T(i+1) - T(i) corresponds to a time duration during which a certain value is associated to the water flow rate, depending on the temperature (or temperature range) measured for the steam chamber.
For example, the difference T(i+1) - T(i) is equal to 1 second.
The first range of values (Rl), the second range of values (R2), and the third range of values (R3) are thus arranged in look-up tables linking the temperature of the steam chamber with values of water flow rate sorted along the time.
Preferably, for a given temperature of the steam chamber, the values of water flow rate are decreasing when the time is incrementing. For example, R1 X1 is larger than R1 X2, R2 X1 is larger than R2 X2, and R3 X1 is larger than R3 X2. Alternatively, for a given temperature of the steam chamber, the values of water flow rate are kept constant when the time is incrementing.
Alternatively, for a given temperature of the steam chamber, the values of water flow rate are increasing when the time is incrementing.
Preferably, the values of water flow rate are decreasing when the temperature of the steam chamber is decreasing.
Alternatively, the values of water flow rate are kept constant when the temperature of the steam chamber is decreasing.
As an example, let consider that the first duration threshold TH1 = 6 seconds, and that the second duration threshold TH2 = 5 seconds.
When at time tO the user activates the user trigger means, the previous OFF duration (d_OFF) is compared to the first duration threshold TH1.
The different following scenarios may happen:
Scenario lb : The previous OFF duration (d_OFF) is shorter than the first duration thresho Id TH 1 , for example d_OFF = 3 seconds. The previous ON duration (d_ON) is shorter than said second duration threshold (TH2), for example d_ON = 4 seconds. The water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl), depending on the current temperature of the steam chamber. This corresponds to step 304. The water flow rate value Rl Xi corresponds to the value at the time starting before a given duration from the end of the first range of values (Rl), said given duration corresponding to the difference between the second duration threshold (TH2) and the previous ON duration (d_ON), i.e. (TH2 - d_ON) = 1 second before the end of the first range of values (Rl), which corresponds to time interval T5 to T6. An illustration of this scenario is provided in below Table 3b.
Scenario 2b : The previous OFF duration (d_OFF) is shorter than the first duration thresho Id TH 1 , for example d_OFF = 3 seconds. The previous ON duration (d_ON) is larger than said second duration threshold (TH2), for example d_ON = 6 seconds. The water pump is activated with a water flow rate value R2_Xi from the second range of values (R2), which is associated with the initial time T8 to T9, and depending on the current temperature of the steam chamber. This corresponds to step 305. An illustration of this scenario is provided in below Table 4b.
It is noted that when the water pump is activated with water flow rate values from the second range of values (R2), and if user continuously activates the user trigger means, water flow rate values will continue to be selected from the second range of values (R2). If the end of the second range of values (R2) is reached, a by-default value can be continued to be associated.
Scenario 3b: The previous OFF duration (d_OFF) is larger (or equal to) than the first duration threshold TH1, for example d_OFF = 7 seconds. The water pump is activated with a water flow rate value Rl Xi from the first range of values (Rl), which is associated with the initial time Tl to T2, and depending on the current temperature of the steam chamber. For example, if at that time the temperature of the steam chamber is Temp_(3), the water flow rate value R1 X2. This corresponds to step 401. An illustration of this scenario is provided in below Table 5b.
When the water pump is associated with water flow rate in the first range of values (Rl) and that the user continuously activates the user trigger means, this situation is continued until the end of the first range of values (Rl) is reached, so in the above example, when T6 is reached.
When the end of first range of values (Rl) is reached, the water pump is associated with water flow rate in the third range of values (R3).
In above example, if the water pump is associated with water flow rate R1 X5 during time interval T5 and T6, with a temperature of the steam chamber Temp_(3), the water flow rate is associated to value R3 X1, assuming temperature of the steam chamber at the beginning of T6 is still Temp_(3).
Below Table 2b is a numerical example of Table lb.
Table 2b The following Table 3b is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
Table 3b
The following Table 4b is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
Table 4b
The following Table 5b is an example of a sequence on how values are associated to the water flow rate along the time after user has initially activated the user trigger means and if the user continuously activates the user trigger means. The associated values are underlined.
Table 5b Fig.5 depicts a garment care device 501 according to the invention. The garment care device (501) comprises:
an iron (502) comprising a steam chamber (503),
a base (504) connected via a hose (505) to the iron (502), the base (504) comprising a water tank (510) and a water pump (506),
a user trigger means (507) to activate the water pump (506) for dosing water from the water tank (510) in the steam chamber (503),
a temperature sensor (508) for measuring the temperature of the steam chamber (503), a control unit (509) comprising code instructions for carrying out the steps of the method described above.
The invention also relates to computer program comprising code instructions for carrying out the steps of the method described above.
The above embodiments as described are only illustrative, and not intended to limit the technique approaches of the present invention. Although the present invention is described in details referring to the preferable methods and embodiments, those skilled in the art will understand that the technique approaches of the present invention can be modified or equally displaced without departing from the protective scope of the claims of the present invention. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. Any reference signs in the claims should not be construed as limiting the scope.

Claims

1. A method of controlling a garment care device, the garment care device comprising a steam chamber, a water pump, and a user trigger means to activate the water pump for dosing water in the steam chamber, the method comprising the steps of:
determining (101), upon the user trigger means is activated, a water flow rate for the water pump, based on:
a) the previous OFF duration (d_OFF) during which the user trigger means was not activated for the previous time,
b) the previous ON duration (d_ON) during which the user trigger means was activated for the previous time,
activating (102) the water pump with said water flow rate.
2. Method as claimed in claim 1, wherein the step of determining (101) comprises:
comparing (301) the previous OFF duration (d_OFF) to a first duration threshold (THl), if the previous OFF duration (d_OFF) is shorter than said first duration threshold (THl), comparing (302) the previous ON duration (d_ON) to a second duration threshold (TH2), if the previous ON duration (d_ON) is shorter than said second duration threshold (TH2), associating (304) to the water flow rate a value selected in a first range of values (Rl), if the previous ON duration (d_ON) is larger than said second duration threshold (TH2), associating (305) to the water flow rate a value selected in a second range of values (R2), the values in the first range of values (Rl) being larger than values in the second range of values (R2).
3. Method as claimed in claim 2, further comprising the step of:
if the previous OFF duration (d_OFF) is larger than said first duration threshold (THl), associating (401) to the water flow rate a value selected in the first range of values (Rl).
4. Method as claimed in claim 3, further comprising the step of:
if the user trigger means is continuously activated, and if the previous OFF duration (d_OFF) is larger than said first duration threshold (THl), associating (601) to the water flow rate a value selected in the first range of values (Rl) for a first duration (Dl) which is at the maximum equal to said second duration threshold (TH2).
5. Method as claimed in claim 2, further comprising the step of:
if the user trigger means is continuously activated, and if the previous ON duration (d_ON) is shorter than said second duration threshold (TH2), associating (602) to the water flow rate a value selected in the first range of values (Rl) for a second duration (D2) which is at the maximum equal to the difference between said second duration threshold (TH2) and said previous ON duration (d_ON).
6. Method as claimed in anyone of claims 4 or 5, further comprising the step of:
if the user trigger means is continuously activated, and if said first duration (Dl) has elapsed or said second duration (D2) has elapsed, associating (603) to the water flow rate a value selected in a third range of values (R3),
the values in the third range of values (R3) being smaller than values in the second range of values (R2).
7. Method as claimed in claim 6, further comprising the step of:
if the user trigger means is continuously activated, and after the water pump has been actuated with values of flow rate from said third range of values (R3) for more than a predetermined third duration (D3), associating (604) to the water flow rate a value selected in the second range of values (R2).
8. Method as claimed in claim 6 or 7, wherein the third range of values (R3) has null values.
9. Method as claimed in anyone of the preceding claims, wherein the step of determining (101) is further based on the current temperature of the steam chamber.
10. Method as claimed in claim 9, when depending on claim 6, wherein said third range of values (R3) is arranged in a look-up table linking the temperature of the steam chamber with values of water flow rate sorted along the time.
11. Method as claimed in claim 9, when depending on claim 2, wherein said first range of values (Rl) and second range of values (R2) are arranged in look-up tables linking the temperature of the steam chamber with values of water flow rate sorted along the time.
12. Method as claimed in claim 10 or 11, wherein in the look-up tables, for a given temperature of the steam chamber, the values of water flow rate are decreasing when the time is incrementing.
13. Method as claimed in claim 10 or 1 1, wherein in look-up tables, for a given time, the values of water flow rate are decreasing when the temperature of the steam chamber is decreasing.
14. Garment care device (501) comprising:
an iron (502) comprising a steam chamber (503),
- a base (504) connected via a hose (505) to the iron (502), the base (504) comprising a water tank (510) and a water pump (506),
a user trigger means (507) to activate the water pump (506) for dosing water from the water tank (510) in the steam chamber (503),
a temperature sensor (508) for measuring the temperature of the steam chamber (503), - a control unit (509) comprising code instructions for carrying out the steps of the method as claimed in claims 1 to 13.
15. Computer program comprising code instructions for carrying out the steps of the
method as claimed in anyone of claims 1 to 13.
EP18730751.7A 2017-06-20 2018-06-11 Method and device for dosing water in a steam chamber Active EP3642407B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17176854.2A EP3418441A1 (en) 2017-06-20 2017-06-20 Method and device for dosing water in a steam chamber
PCT/EP2018/065271 WO2018234072A1 (en) 2017-06-20 2018-06-11 Method and device for dosing water in a steam chamber

Publications (2)

Publication Number Publication Date
EP3642407A1 true EP3642407A1 (en) 2020-04-29
EP3642407B1 EP3642407B1 (en) 2021-01-13

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EP17176854.2A Withdrawn EP3418441A1 (en) 2017-06-20 2017-06-20 Method and device for dosing water in a steam chamber
EP18730751.7A Active EP3642407B1 (en) 2017-06-20 2018-06-11 Method and device for dosing water in a steam chamber

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EP17176854.2A Withdrawn EP3418441A1 (en) 2017-06-20 2017-06-20 Method and device for dosing water in a steam chamber

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EP (2) EP3418441A1 (en)
CN (1) CN110785522B (en)
RU (1) RU2762250C2 (en)
WO (1) WO2018234072A1 (en)

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Publication number Priority date Publication date Assignee Title
FR3081888B1 (en) 2018-05-31 2020-05-15 Seb S.A. IRONING APPARATUS HAVING A STEAM CONTROL MEMBER

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010664A (en) * 1988-11-18 1991-04-30 Matsushita Electric Industrial Co., Ltd. Steam iron having a solenoid driven pump and heated evaporation chamber for providing steam and operable for further providing extra steam at specified intervals
SG83185A1 (en) * 2000-01-25 2001-09-18 Koninkl Philips Electronics Nv Steam iron
ES2712909T3 (en) * 2005-07-29 2019-05-16 Koninklijke Philips Nv Steam ironing device to generate a steam blast
GB2456303A (en) * 2008-01-08 2009-07-15 Tunbow Electrical Ltd Steam iron with steam control
GB2484689A (en) * 2010-10-20 2012-04-25 Richards Morphy N I Ltd Hand iron cooling
RU2573815C9 (en) * 2010-12-23 2017-01-23 Конинклейке Филипс Электроникс Н.В. Steam device for ironing
EP3126565B1 (en) * 2014-03-31 2018-05-16 Koninklijke Philips N.V. Apparatus including a steam generator and method of controlling the same
CN105442288B (en) * 2014-06-03 2018-11-09 漳州灿坤实业有限公司 The steam of vapour iron disengages management-control method
FR3040402B1 (en) * 2015-08-27 2017-08-11 Seb Sa HOUSEHOLD APPLIANCE FOR TREATMENT OF STEAM LAUNDRY COMPRISING A STEAM DIFFUSION CONTROL KNOB

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EP3642407B1 (en) 2021-01-13
RU2020102082A3 (en) 2021-10-11
WO2018234072A1 (en) 2018-12-27
CN110785522A (en) 2020-02-11
CN110785522B (en) 2022-06-03
EP3418441A1 (en) 2018-12-26
RU2020102082A (en) 2021-07-20
RU2762250C2 (en) 2021-12-17

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