CN113811648A - Laundry treating machine and method for controlling the same - Google Patents
Laundry treating machine and method for controlling the same Download PDFInfo
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- CN113811648A CN113811648A CN201980096329.3A CN201980096329A CN113811648A CN 113811648 A CN113811648 A CN 113811648A CN 201980096329 A CN201980096329 A CN 201980096329A CN 113811648 A CN113811648 A CN 113811648A
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- 238000000034 method Methods 0.000 title claims description 19
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 15
- 238000005265 energy consumption Methods 0.000 claims description 52
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000007257 malfunction Effects 0.000 claims description 4
- 238000005406 washing Methods 0.000 description 13
- 238000010412 laundry washing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- 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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/46—Control of the energy or water consumption
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- 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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/10—Power supply arrangements, e.g. stand-by circuits
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- 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
- D06F2103/40—Opening or locking status of doors
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- 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
- D06F2103/46—Current or voltage of the motor driving the drum
-
- 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
- D06F2105/54—Changing between normal operation mode and special operation modes, e.g. service mode, component cleaning mode or stand-by mode
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- 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
- D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air
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- 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
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/12—Casings; Tubs
- D06F39/14—Doors or covers; Securing means therefor
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
A laundry treating machine (1) comprising: a housing (2); a laundry drum rotatably mounted within the housing (2) for receiving laundry to be treated; a porthole door (5); a main power line (10) having a main predetermined supply voltage (V1); a door power line (11); a door lock switch device (12) configured to toggle back and forth between a closed state and an open state to connect and disconnect the door power line (11) to and from the main power line (10), respectively; a first electronic/electric load (14, 15) connected to the main power line (11); a second electronic/electric load (20, 23) connected to the door power line (11); an electronic sensing circuit (25a, 25b, 27, 32) connected to the main power line (10); a first switch (16) configured to toggle back and forth between a closed state and an open state to electrically connect a first electronic/electrical load (14, 15) and a sensing circuit (25a, 25b, 27, 32) to and correspondingly disconnect the first electronic/electrical load and the sensing circuit from the main power line (11) upstream of the door latch switching device (12); an electronic control device (13) which switches the first switch (16) to the open state when the laundry treating machine goes from an operating state to a standby mode, so as to electrically disconnect the first electronic/electric load (14, 15) and the sensing circuit (25a, 25b, 27, 32) from the main power line (11).
Description
The present invention relates to a laundry treating machine which can be switched back and forth between a standby state and a waiting/operating state.
More particularly, the present invention relates to the reduction of standby-state energy consumption during standby state of a household laundry treating machine (such as a laundry washing machine, or a laundry drying machine, or a washing and drying machine); the following description relates to a household laundry treating machine by way of example only.
As is known, some new generation laundry treatment machines are designed to automatically switch from a standby state, in which the machine remains stationary at the end of the laundry treatment cycle, waiting for a new command by the user, to a standby state, in which the energy consumption of the machine is minimal, i.e. lower than the energy consumption of the machine in the standby state.
Indeed, in order to reduce the energy consumption of laundry treatment machines, electronic control devices have been devised over the last few years which switch the machine to a standby state by automatically opening a plurality of switches between the power network and the appliance apparatus to cut off the power to the apparatus, which, upon receiving an enabling signal, closes the switches to power the apparatus, so as to be ready to perform another operating cycle.
Although the standby-state energy consumption of laundry treatment machines is undoubtedly reduced, the reduction provided by such electronic control devices does not comply with the latest regulations governing the energy consumption of new-generation appliances, in which it is required to have a power consumption lower than the 0.3 watt energy threshold.
It is therefore an object of the present invention to provide a laundry treating machine designed to perform as described above, while keeping the standby-state consumption of the electric household appliance preferably below 0.3 watt energy consumption.
The above object is achieved by the present invention, which relates to a laundry treating machine comprising a casing; a drum mounted inside the housing and designed to receive laundry; a porthole door for providing access to the drum; a main power line designed to have a main predetermined supply voltage; a door power line; a door lock switch device configured to toggle between a closed state and an open state to connect and disconnect the door power line to and from the main power line, respectively; one or more first electrical/electronic loads connected to the main power line upstream of the door lock switch device; one or more second electrical/electronic loads connected to the door power line downstream of the door lock switch device; one or more electronic sensing circuits connected to said main power line upstream of said door lock switch device and configured to detect one or more parameters indicative of the operation of said first and/or second electronic/electric loads, said laundry treatment machine being designed to switch from an active state associated with an active energy consumption to a standby state associated with a minimum energy consumption lower than said active energy consumption, wherein said door lock switch device is in the open state, said laundry treatment machine being characterized by comprising: a first switch connecting the first electronic/electric load and the sensing circuit to the main power line upstream of the door lock switch device, and the electric control device is configured to switch the first switch from an off state to the on state to electrically disconnect the first electronic/electric load and the sensing circuit from the main power line when the laundry treating machine is in the standby state.
Preferably, the laundry treating machine comprises: an electric motor designed to rotate the drum; the second electric/electronic load comprising a motor control device configured to control the electric motor; a current line electrically connecting said motor control device to said main said power line through said first switch, said electronic control device being further configured to switch said first switch from the open state to the closed state when said laundry treating machine goes from the off state to the on state before the door lock switch device is switched from the open state to the closed state, so as to supply current to said motor control device via said current line.
Preferably, the laundry treating machine comprises a current limiter circuit connected to said current line and designed to limit the current supplied to said motor control device to a value lower than a predetermined current threshold.
Preferably, the motor control apparatus includes a capacitor; the current limiter circuit is designed to limit the current used to charge the capacitor.
Preferably, the first electrical load comprises one or more electric motor pumps; opening of the first switch disconnects an electronic sensing circuit associated with the electric motor pump from the main power line.
Preferably, the electric motor pumps are controlled by respective switching devices; an electronic sensing circuit is designed to detect a malfunction of the switching device.
Preferably, the second electrical/electronic load comprises a heating device connected by a command line between the door power line and a reference line having a predetermined voltage, the electronic sensing circuit comprising a heating device sensing circuit electrically connected between the heating device and the main power line by the first switch, opening of the first switch disconnecting the heating device sensing circuit from the main power line.
Preferably, the electronic control device is further configured to switch said first switch from said closed state to said open state when said laundry treating machine goes from an on mode to an off mode after the door lock switching apparatus is switched from the closed state to the open state.
Preferably, the laundry treating machine is designed to switch back and forth between an operating state associated with a high energy consumption and a waiting state associated with a medium energy consumption lower than said high energy consumption; the active state corresponds to the wait state and the active energy consumption corresponds to the intermediate energy consumption.
Preferably, the electronic control device is configured to switch said door lock switch apparatus from the closed state to the open state when said laundry treating machine is switched from the operating state to said waiting state.
Preferably, the electronic control device is configured to check one or more control parameters of the machine in the waiting state, and to switch the door lock switch apparatus from the closed state to the open state based on a result of the check.
The present invention further relates to a method for controlling a laundry treating machine, the laundry treating machine comprising: a housing; a drum mounted inside the housing and designed to receive laundry; a porthole door for providing access to the drum; a main power line designed to have a main predetermined supply voltage; a door power line; a door lock switch device configured to toggle between a closed state and an open state to connect and disconnect the door power line to and from the main power line, respectively; one or more first electrical/electronic loads connected to the main power line upstream of the door lock switch device; one or more second electrical/electronic loads connected to the door power line downstream of the door lock switch device; one or more electronic sensing circuits connected to the main power line upstream of the door lock switch device and configured to detect one or more parameters indicative of operation of the first and/or second electronic/electrical loads; a first switch connecting said first electric/electronic load and said sensing circuit to said main power line upstream of said door lock switching device, said laundry treating machine being designed to switch from an active state associated with an active energy consumption to a standby state associated with a minimum energy consumption lower than said active energy consumption, in which standby state said door lock switching device is in the open state, said method comprising the steps of: switching the first switch from an off state to an on state to electrically disconnect the first electronic/electrical load and the sensing circuit from the main power line when the laundry treating machine is in the standby state.
Preferably, the laundry treating machine includes: an electric motor designed to rotate the drum; the second electric/electronic load comprising a motor control device configured to control the electric motor; a current line electrically connecting the motor control device to the main power line through the first switch; the method comprises the following steps: switching the first switch from the open state to the closed state when the laundry treating machine is turned from the off state to the on state before the door lock switching device is switched from the open state to the closed state, so as to supply the current to the motor control device via the current line.
Preferably, the method comprises the steps of: switching the first switch from the closed state to the open state when the laundry machine is turned from an on mode to an off mode after the door lock switching device is switched from the closed state to the open state.
Preferably, the method comprises the steps of: switching back and forth between an operating state associated with high energy consumption and a waiting state associated with medium energy consumption lower than the high energy consumption; the active state corresponds to the wait state and the active energy consumption corresponds to the intermediate energy consumption.
Further features and advantages of the invention will be highlighted in more detail in the following detailed description of some of the preferred embodiments of the invention, given by reference to the attached drawings.
In the drawings, corresponding features and/or components are identified by the same reference numerals.
Specifically, the method comprises the following steps:
FIG. 1 is a schematic diagram illustrating a laundry machine provided with a standby power saving system according to an example embodiment of the present disclosure; and is
Fig. 2 schematically shows a circuit of the standby power saving system shown in fig. 1.
The configurations shown in the embodiments recited in the present specification and drawings are only exemplary embodiments of the present disclosure, and it should be understood that there are various modified examples that can replace the embodiments of the specification and drawings at the time of filing this application.
As described hereinafter, the present invention has proved to be particularly advantageous when applied to laundry treatment machines, such as laundry washing machines.
It should be understood that although the present method is described with reference to a laundry washing machine, other applications are envisaged. As can be appreciated, the present invention may be conveniently applied to other laundry treating appliances, such as laundry washers and laundry dryers (also known as washers/dryers).
Referring to fig. 1, reference numeral 1 generally indicates a household laundry treating machine configured to perform a laundry treating washing cycle selectable by a user from a plurality of predetermined laundry treating washing cycles via a control panel 50.
The home laundry treating machine 1 includes: a rigid external box-like casing 2, preferably (but not necessarily) substantially parallelepiped-shaped, structured to rest on the floor; preferably substantially cylindrical, bell-shaped hollow washing tub (not shown) arranged inside casing 2, with its opening or mouth directly facing the laundry loading/unloading through opening realized in front wall 2a of box-like casing 2.
The home laundry treating machine further includes: a preferably substantially cylindrical, elastically deformable bellows (not shown) which connects the front opening or mouth of the washing tub watertight to the laundry loading/unloading opening realized in the front wall 2a of the casing 2; and a substantially cylindrical, bell-shaped revolving perforated drum 4 structured for housing the laundry to be washed and housed in an axially rotating manner inside the washing tub so as to be freely rotatable about its longitudinal reference axis (preferably but not necessarily the horizontal rotation axis). In alternative embodiments not shown, the axis of rotation may be vertical or inclined.
According to one embodiment, revolving drum 4 is housed in an axially rotating manner inside the washing tub, with its front opening directly facing/aligned to the laundry loading/unloading opening on front wall 2a of casing 2, and the drum rotation axis is preferably arranged locally substantially coinciding with the substantially horizontally oriented longitudinal reference axis of the washing tub.
Furthermore, the hollow washing tub is preferably suspended in a floating manner inside the casing 2 via a suspension system, which preferably (but not necessarily) comprises a pair of upper helical springs (not shown) connecting the upper portion of the washing tub to the top of the box-like casing 2, and a pair of lower shock absorbers (not shown) connecting the bottom portion of the washing tub to the bottom of the box-like casing 2.
Referring to fig. 1, the laundry treating machine 1 additionally includes: a porthole door 5 hinged to the front wall 2a of the casing 2 so as to rotate about a reference axis, preferably (but not necessarily) vertically oriented, to and from a closed position in which the peripheral border of the porthole door 5 rests completely on the front wall so as to close the laundry loading/unloading opening and watertight seal the washing tub; and an electric motor assembly (not shown) comprising an electric motor 6 and structured for driving the revolving drum 4 in rotation about its longitudinal reference axis inside the washing tub by means of a belt/pulley system (not shown). In different embodiments of the invention, the electric motor assembly 6 can be directly associated with the shaft of the revolving drum 4.
With reference to fig. 1 and 2, the laundry washing machine 1 is additionally provided with an electronic/electric system 7 which controls the operation of the laundry treating machine 1.
The laundry treating machine 1 is configured to selectively operate at least in the following states: on state, off state, operating state, standby state.
It should be understood that the on-state and the off-state mean that the laundry treating machine 1 has been switched on and off, respectively, by the user, i.e. through the control panel 5.
It should be further understood that "operating state" means an "active state" in which the laundry treating machine 1 performs a laundry treating cycle. During the operating state, the machine 1 has an active energy consumption corresponding to a high energy consumption.
It should further be understood that "wait state" means an "active state" in which the machine is temporarily held stationary, waiting for a user command.
According to the present invention, the laundry treating machine 1 may be configured to automatically switch back and forth between the operating state and the waiting state.
During the waiting state, some electrical loads are not powered, and laundry treating machine 1 has an active energy consumption corresponding to a medium energy consumption, which is lower than the high energy consumption of the operating state.
Preferably, the laundry treating machine 1 may be configured to automatically switch from the operating state to the waiting state after the laundry treating cycle is ended.
Preferably, laundry treating machine 1 may be configured to automatically switch from the operating state to the waiting state based on a user command (i.e. a pause command, or any similar command).
It should further be understood that "standby state" means a state in which the machine 1 has a minimum energy consumption lower than the medium energy consumption of the waiting active state. According to the present invention, the laundry treating machine 1 may be configured to switch back and forth between a waiting state and a standby state.
Referring to fig. 2, the electronic/electric system 7 comprises: a first terminal 8 and a second terminal 9 designed to be connected to an external power line F having a main voltage V1 corresponding to an alternating high voltage (220/110 volts AC) and to a neutral line N, respectively.
The electronic/electric system 7 further comprises a main power line 10 electrically connected to the first terminal 8 and designed to provide a main voltage V1, a reference line 3 connected to the second terminal 9 and having a reference low voltage (i.e. the voltage of the neutral line N).
The electronic/electric system 7 further comprises a door power line 11 and a door lock switching device 12 electrically connected between the door power line 11 and the main power line 10 and configured to electrically connect the door power line 11 to the main power line 10 or to alternatively disconnect the door power line from the main power line based on the command signal.
The door lock switch device 12 is associated with a door lock mechanism (not shown) that locks and alternatively unlocks the porthole door 5 upon command.
The door lock switch device 12 may include an electromechanical switch, in particular a relay, which may be controlled by an electronic switch, in particular a triac (TRIode for alternating current).
The electronic/electric system 7 further comprises an electronic control device 13, i.e. a microcontroller, configured to generate command signals for opening/closing the door lock switching device 12.
The electronic control device 13 may be configured to provide command signals in order to open the door lock switch device 12 based on the status of the laundry treating machine 1 and on the result of some control programs.
For example, when the laundry treating machine 1 changes from the operating state to the waiting state, the electronic control device 13 may execute some control programs in which it checks some control parameters of the machine, i.e. the water level in the tub, the temperature of the water, the speed of the drum, the voltage, etc.
If the result of the control procedure is positive, i.e. there is no critical/dangerous situation in the interior space of the drum 4, the electronic control device 13 may unlock the door 5 and switch the door lock switching device 12 to the open state.
In addition, the electronic control device 13 may be configured to provide a command signal to switch the door-lock switching device 12 to the closed state when the laundry treating machine 1 is in the operating state or in the waiting state and the porthole door 5 is locked/closed.
In this case, the command signal may be generated by the electronic control device 13 in response to a start command of the laundry treatment cycle (i.e. a command entered by the user for starting the laundry treatment course).
When the door-lock switching device 12 is in the closed state, the door power line 11 is electrically connected to the main power line 10 and is energized with the main voltage V1.
The electronic control device 13 may be further configured to provide a command signal to switch the door lock switching device 12 to the open state to electrically isolate the door power line 11 from the main power line 10 when the laundry treating machine 1 is in the waiting state and the porthole door 5 has been unlocked.
The laundry treating machine 1 further comprises one or more electronic/electric loads configured to perform respective laundry treating functions during a laundry treating phase of the laundry treating cycle.
According to a preferred embodiment, the electric/electronic load may comprise a motor-controlled pump 14, which may comprise an electric motor and is associated with a draining hydraulic circuit (not shown) of laundry treatment machine 1.
According to a preferred embodiment, the electronic/electric load may further comprise a motor-controlled pump 15, which may comprise an electric motor and which is associated with a water scrubber hydraulic circuit (not shown).
Referring to the exemplary embodiment shown in fig. 2, a motor-controlled pump 14 and a motor-controlled pump 15 are electrically connected between the reference line 3 and the main power line 10. Preferably, the motor-controlled pump 14 and the motor-controlled pump 15 are connected/disconnected to/from the main power line 10 by means of a switch 16.
The switch 16 may be an electronic switch or an electromechanical switch, in particular a relay. The switch 16 may comprise a terminal connected to the main power line 10 upstream of the door lock switching device 12, and a terminal connected to the motor-controlled pumps 14 and 15 by a power supply line 18.
With reference to the exemplary embodiment shown in fig. 2, the motor-controlled pump 14 and the motor-controlled pump 15 may be connected to the reference line 3 by means of switches 14a, 15a, respectively.
The switches 14a and 15a are configured to be controlled by the electronic control device 13 during the implementation of a laundry treatment cycle, so as to selectively command the switching on/off of the relative motor-controlled pumps 14, 15.
With reference to the exemplary embodiment shown in fig. 2, the electronic/electric load of the laundry treating machine 1 may further comprise a heating device 20. The heating device 20 may be electrically connected to the door power line 11 and the reference line 3 by means of a switch 21.
Preferably, the switch 21 is connected to the heating device 20 by a power line 22. The heating device 20 may comprise one or more resistive components, i.e. one or more resistors. The heating device 20 can be selectively switched on/off by means of the switch 21 by means of the electronic control device 13. The on/off of the switch 21 can be controlled by the electronic control device 13 on the basis of the laundry treatment phase carried out.
Preferably, the heating device 20 may be configured to heat water to be used during one or more phases of the laundry treatment process. It should be understood that in a dryer configuration, heating apparatus 20 may be configured to heat air.
The electric/electronic load of the laundry treating machine 1 further comprises a motor control unit 23. The motor control unit 23 may be configured to control the electric motor 6 of the electric motor assembly. The electric motor 6 may be controlled by the motor control unit 23 based on one or more commands provided by the electronic control device 13.
The motor control unit 23 may be connected between the door power line 11 and the reference line 3.
Referring to the exemplary embodiment shown in fig. 2, the motor control unit 23 is connected to the door power line 11 through a switch 24. The motor control unit 23 may include a printed circuit board provided with one or more capacitive components 23 a.
The capacitive component 23a may comprise, for example, a motor electrolytic capacitor/condenser.
Referring to the exemplary embodiment shown in fig. 2, a plurality of additional electronic/electrical loads (only one of which is indicated at 35 in fig. 2) may be connected between the door power line 11 and the reference line 3 downstream of the door lock switch device 12. The electronic/electric loads 35 can be controlled by the electronic control device 13 via corresponding switches 34.
The electronic/electric powered system 7 further includes one or more sensing circuits associated with the respective electronic/electric loads and configured to provide signals indicative of operation of the respective electronic/electric loads.
Referring to the exemplary embodiment shown in fig. 2, the sensing circuit includes a sensing circuit 14b that is associated with the motor controlled pump 14 and provides a signal indicative of the operation of the switching device 14a and/or the motor controlled pump 14. The sensing circuit 14b may be configured to provide a signal containing a parameter indicative of a failure of the switching device 14a and/or the motor pump sensing circuit 14b (i.e. an electrical parameter) to the electronic control device 13.
Referring to the exemplary embodiment shown in fig. 2, the sensing circuit includes a sensing circuit 15b that is associated with the motor controlled pump 15 and provides signals indicative of the operation of the switching device 15a and/or the motor controlled pump 15. The sensing circuit 15b may be configured to provide a signal containing a parameter indicative of a failure of the switching device 15a and/or the motor pump sensing circuit 15b (i.e. an electrical parameter) to the electronic control device 13.
The electronic/electric powered system 7 further includes a heater sense line 26 connected between the power supply line 18 and the power line 22. The heater sense line 26 may include, for example, a resistive voltage divider 27 provided with two resistive components. The first resistive component R1 is connected along the heater sensing line 26, and the second resistive component R2 is disposed along a branch line which in turn connects the heater sensing line 26 to the electronic control device 13 downstream of the first resistive component R1.
The electronic control device 13 may be configured to determine a fault condition of the heating device 20 based on the signal received via the branch line. For example, the signal in the branch line may be a voltage signal indicating a fault condition of the heating device 20, i.e. caused by a breakdown of the resistor.
The electronic/electric system 7 further comprises an inrush current limiter line 28 connected between the supply line 18 and the line connecting the switching device 24 to the motor control unit 23.
The inrush current limiter line 28 may include a limiter circuit 29 configured to limit the current supplied to the motor control unit 23.
According to an embodiment, the limiter circuit 29 may comprise a diode (not shown) and a resistive component (not shown) placed in series along the inrush current limiter line 28.
Preferably, the diode may include a cathode connected to the power supply line 18 and an anode connected to the motor control unit 23 through a resistance member. The inrush current limiter line 28 is advantageously configured to: on the one hand, the capacitor 23a of the motor control unit 23 is charged before the door line 11 is energized by closing the door lock switching device 12; on the other hand, the current supplied to the motor control unit 23 is limited to a predetermined safe value that does not damage the printed circuit board 23 and/or the capacitor 23 a.
The electronic/electric-powered system 7 may further comprise a sensing circuit 32 connected between the electronic control device 13 and the inrush current limiter line 28 downstream of the electronic limiter circuit 29.
Preferably, the sensing circuit 32 provides the electronic control device 13 with a signal indicating a malfunction of the motor control unit 23.
The electronic/electric system 7 may further comprise a plurality of sensing circuits (one of which is shown in fig. 2 and numbered 33) associated with respective electric loads 35 connected to the door power line 11.
The sensing circuit 33 is configured to provide a signal indicative of a failure of the respective sensing load 35 to the electronic control device 13.
The control method is described in more detail below, wherein it is assumed that the laundry treating machine 1 is initially in a switched-off state, i.e. inactive.
Further assume that: the door 5 is unlocked and the door lock switch device 12 is in an open state such that the door power line 11 and the electrical load connected to the door power line 11 are electrically isolated from the main power line 10. In addition, switch 16 is in an open state such that power supply line 18, heater sense line 26, and inrush current limiter line 27 are electrically isolated from main power line 10.
It should be understood that according to the exemplary embodiment illustrated in fig. 2, in the waiting state, the switch 14a, the switch 15a, the sensing circuit 14b, the sensing circuit 15b, the motor control unit 23, the switch 34, the sensing circuit 33 are powered. Vice versa, in the standby state, the switch 14a, the switch 15a, the sensing circuit 14b, the sensing circuit 15b, the motor control unit 23, the switch 34, the sensing circuit 33 are not powered.
The user may close the porthole door 5 and activate (i.e. switch on) the laundry treating machine 1 by selecting a laundry treating cycle via the control panel 50 and inputting a start command.
In this step, the laundry treating machine 2 is in a waiting state.
The electronic control unit 13 detects that the porthole door 5 is closed, receives a user's command, locks the door 5, switches from the waiting state to the operating state for starting the laundry treatment cycle selected by the user.
Before commanding the closing of the door-lock switching device 12 and starting the laundry treatment cycle, the electronic control unit 13 closes the switch 16 for energizing the command line 18 with the main voltage V1. The closed switch 16 causes current to be supplied to the motor control unit 23 via the inrush current limiter line 28. Before the door-lock switching device 12 is closed, the current charges the capacitor 23a of the motor control unit 23. This means that when the laundry treatment cycle is actually started, the motor control unit 23 can switch on the electric motor 6 immediately (i.e. without any delay due to the recharging of the capacitor). In other words, the applicant has found that performing the pre-charging of the capacitor 23a of the motor control unit 23, as disclosed above, has the technical effect of reducing the delay of turning on the electric motor 6 for the first time and thus eliminating the delay in the start-up cycle.
Considering the limiter circuit 29 on the inrush current limiter line 28, the risk of damaging the motor control unit 23 during charging of the capacitor 23a is further prevented.
In addition, energization of the command line 18 activates the sensing circuits 14b, 15b, 32 and the heater sense line 26, which can be sensed by the electronic control unit 13.
After the switch 16 has been closed, the electronic control unit 13 may check the sensing signal and determine a malfunction caused by the switches 14a, 15a of the motor-controlled pumps 14, 15, or by the heating device 20, or by the motor control unit 23.
Thereafter, the electronic control unit 13 closes the door lock switching device 12 to energize the door power supply line 11 and starts to perform the laundry treatment cycle.
It should be understood that, at this stage, the laundry treatment machine 1 is in operation, and the electronic control unit 13 controls the switches 14a, 15a, 21, 24 and 34 on the basis of the laundry treatment stage to be carried out.
At the end of the laundry treatment cycle and/or in response to a command, i.e. when the user selects the interrupt/pause command, the laundry treatment machine 1 automatically changes from the operating state to the waiting state.
The laundry treating machine 1 may be changed to the waiting state, and the electronic control unit 13 may execute some control programs, and based on a positive result of the program, control the door-lock switching device 12 to change it from the closed state to the open state, so as to isolate the door power line 11 from the main power line 10 and unlock the door 5. This means that during the waiting state, the loads 20 and 23 connected to the door power line 11 downstream of the door lock switching device 12 are not energized and do not consume power. In fact, when the machine 1 changes from the operating state to the waiting state, its energy consumption is reduced from a high energy consumption to a medium energy consumption.
In case the user does not input a command in the control panel at this time, the laundry treating machine 1 may automatically change from the waiting state to the standby state after a predetermined time.
When the laundry machine 1 changes to the standby state, the electronic control unit 13 switches the switch 16 to the on state. This means that during the standby state, the sensing circuits 14b, 15b, 27, 32, 34 of the laundry treating machine 1 are not energized and do not consume power. In fact, when the machine 1 changes from the waiting state to the standby state, its energy consumption is reduced from a medium energy consumption to a minimum energy consumption lower than the medium energy consumption.
More specifically, the opening of switch 16 during the standby state allows sensing circuits 14b, 15b, heater sense line 26, and inrush current limiter line 28 to be electrically disconnected from main power line 10.
The applicant has found that disconnecting the sensing circuits 14b, 15b, the heater sensing line 26, and the inrush current limiter line 27 from the main power line 10 reduces the minimum energy consumption of the laundry treating machine 1 during the standby state to a value lower than 0.3 watt.
Vice versa, when laundry treatment machine 1 switches from the standby state to the waiting state, electronic control unit 13 closes switch 16 so as to connect power supply line 18 to main power line 10. This means that the sensing circuits 14b, 15b, heater sense line 26, and inrush current limiter line 28 are energized and are newly operating. The switch from the standby state to the waiting state can be operated as soon as a command is input by the user via the control panel 50, preferably by pressing/touching one or more buttons.
The electronic control unit 13 further controls the door-lock switching device 12 so as to switch it from the open state to the closed state, so as to newly supply the main voltage V1 to the door electric power line 11.
In this step, the user can input a start command via the control panel 50. The electronic control unit 13 detects the user's command and starts the laundry treatment cycle.
In this step, the laundry treating machine 1 is changed from the waiting state to the operating state. When the electronic control unit 13 receives a key-off command (i.e., from a user) at the end of the laundry treating course, the electronic control unit turns on the switch 16, and then turns on the door-lock switching device 12.
The invention has the following advantages:
firstly, the presence of the switching device upstream of the door lock switching device makes it possible to obtain an electrical disconnection of all the sensing circuits of the machine from the main power line during standby operation, thus greatly reducing the consumption of the machine.
Furthermore, the motor control unit is electrically connected to the main power line through the inrush current limiter line and through the switching device, and the switching device is conveniently closed before closing the door lock switching device, on the one hand, so that the delay of the switching-on of the motor assembly when the motor assembly is first activated during a laundry treatment session is reduced, and on the other hand, damage to the motor control board and/or the motor electrolytic capacitor is prevented.
However, it is apparent that changes and modifications may be made to the laundry treating machine and the control method without departing from the scope of the present invention.
Claims (15)
1. A laundry treating machine (1) comprising:
-a housing (2),
-a drum (4) mounted within said casing (2) and designed to receive laundry,
-a porthole door (5) providing access to the drum (4),
a main power line (10) designed to have a main predetermined supply voltage (V1),
-a door power line (11),
-a door lock switch device (12) configured to switch back and forth between a closed state and an open state to connect and disconnect, respectively, the door power line (11) to and from the main power line (10),
-one or more first electric/electronic loads (14, 15) connected to said main power line (11) upstream of said door lock switching device (12),
-one or more second electronic/electric loads (20, 23) connected to the door power line (11) downstream of the door lock switching device (12),
-one or more electronic sensing circuits (14b, 15b, 27, 32) connected to the main power line (10) upstream of the door lock switching device (12) and configured to detect one or more parameters indicative of the operation of the first and/or second electronic/electric loads (14, 15, 20, 23),
the laundry treating machine is designed to switch from an active state associated with an active energy consumption to a standby state associated with a minimum energy consumption lower than said active energy consumption, in which standby state the door lock switch device (12) is in the open state,
the laundry treating machine is characterized by comprising:
-a first switch (16) connecting the first electronic/electric load (14, 15) and the sensing circuit (14b, 15b, 27, 32) to the main power line (11) upstream of the door lock switching device (12), and
-an electronic control device (13) configured to switch said first switch (16) from an off state to the on state to electrically disconnect said first electronic/electric load (14, 15) and said sensing circuit (14b, 15b, 27, 32) from said main power line (11) when said laundry treating machine is in said standby state.
2. The laundry treating machine according to claim 1, comprising:
-an electric motor (6) designed to rotate said drum (4),
-said second electric/electronic load (20, 23) comprising a motor control device (23) configured to control said electric motor (6),
-a current line (28) electrically connecting the motor control device (23) to the main power line (10) through the first switch (16),
-said electronic control means (13) are further configured to switch said first switch (16) from the open state to the closed state, when said laundry treatment machine goes from the switch-off state to the switch-on state, before the door-lock switching device (12) is switched from the open state to the closed state, so as to supply current to said motor control device (23) via said current line (28).
3. The laundry treating machine according to claim 2, comprising: a current limiter circuit (29) connected to the current line (28) and designed to limit the current supplied to the motor control device (23) to a value below a predetermined current threshold.
4. A laundry treating machine according to claim 3, wherein said motor control device (23) comprises a capacitor (23 a); the current limiter circuit (29) is designed to limit the current for charging the capacitor (23 a).
5. The laundry treating machine according to any one of the preceding claims, wherein:
-the first electronic load (14, 15) comprises one or more electric motor pumps;
-opening of said first switch (16) disconnects the electronic sensing circuits (14b, 15b) associated with said electric motor pump from said main power line (10).
6. The laundry treating machine according to claim 5, wherein:
-the electric motor pumps are controlled by respective switching devices (14a, 15 a);
-said electronic sensing circuit (14b, 15b) is designed to detect a malfunction of said switching device (14a, 15 a).
7. The laundry treating machine according to any one of the preceding claims,
-said second electronic/electric load (20, 23) comprises a heating device connected between said door power line (11) and a reference line (3) having a predetermined voltage,
-the electronic sensing circuit comprises a heating device sensing circuit (26) electrically connected between the heating device and the main power line (10) through the first switch (16),
-opening of the first switch (16) disconnects the heating device sensing circuit (26) from the main power line (10).
8. A laundry treating machine according to any one of the preceding claims, wherein said electronic control device (13) is further configured to switch said first switch (16) from said closed state to said open state when said laundry treating machine goes from an on state to an off state after the door lock switching device (12) is switched from the off state to the off state.
9. Laundry treating machine according to any of the preceding claims, designed to switch back and forth between an operating state associated with a high energy consumption and a waiting state associated with a medium energy consumption lower than said high energy consumption; the active state corresponds to the wait state; the active energy expenditure corresponds to the intermediate energy expenditure.
10. Laundry treatment machine according to claim 9, wherein said electronic control means (13) are configured to switch said door lock switch device (12) from the closed state to the open state when said laundry treatment machine switches from the operating state to said waiting state.
11. Laundry treatment machine according to claim 10, wherein said electronic control means (13) are configured to check one or more control parameters of said laundry treatment machine in said waiting state and to switch said door lock switch device (12) from the closed state to the open state based on the result of said check.
12. A method for controlling a laundry treatment machine (1) comprising:
-a housing (2),
-a drum (4) mounted within said casing (2) and designed to receive laundry,
-a porthole door (5) providing access to the drum (4),
a main power line (10) designed to have a main predetermined supply voltage (V1),
-a door power line (11),
-a door lock switch device (12) configured to switch back and forth between a closed state and an open state to connect and disconnect, respectively, the door power line (11) to and from the main power line (10),
-one or more first electric/electronic loads (14, 15) connected to said main power line (11) upstream of said door lock switching device (12),
-one or more second electronic/electric loads (20, 23) connected to the door power line (11) downstream of the door lock switching device (12),
-one or more electronic sensing circuits (14b, 15b, 27, 32) connected to the main power line (10) upstream of the door lock switching device (12) and configured to detect one or more parameters indicative of the operation of the first and/or second electronic/electric loads (14, 15, 20, 23),
-a first switch (16) connecting the first electronic/electric load (14, 15) and the sensing circuit (14b, 15b, 27, 32) to the main power line (11) upstream of the door lock switch device (12),
the laundry treating machine is designed to switch from an active state associated with an active energy consumption to a standby state associated with a minimum energy consumption lower than said active energy consumption, in which standby state the door lock switching device (12) is in the open state,
the method is characterized by comprising the following steps: -switching said first switch (16) from an off-state to the on-state when said laundry treating machine is in said standby state, to electrically disconnect said first electronic/electric load (14, 15) and said sensing circuit (14b, 15b, 27, 32) from said main power line (11).
13. Method according to claim 12, wherein the laundry treatment machine (1) comprises an electric motor (6) designed to rotate the drum (4),
-said second electric/electronic load (20, 23) comprising a motor control device (23) configured to control said electric motor (6),
-a current line (28) electrically connecting the motor control device (23) to the main power line (10) through the first switch (16),
the method comprises the following steps: -switching said first switch (16) from the open state to the closed state when said laundry treatment machine goes from the switch-off state to the switch-on state before the door lock switch device (12) is switched from the open state to the closed state, so as to supply current to said motor control device (23) via said current line (28).
14. The method according to any of the preceding claims 12 or 13, comprising the steps of: switching said first switch (16) from said closed state to said open state when said laundry treating machine turns from an on state to an off state after the door lock switching device (12) is switched from the closed state to the open state.
15. The method according to any of the preceding claims 12 to 14, comprising the steps of: switching the laundry treating machine 1 back and forth between an operating state associated with a high energy consumption and a waiting state associated with a medium energy consumption lower than said high energy consumption; the active state corresponds to the wait state and the active energy consumption corresponds to the intermediate energy consumption.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2019/062247 WO2020228941A1 (en) | 2019-05-13 | 2019-05-13 | Laundry-treating machine and method for controlling such a laundry-treating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113811648A true CN113811648A (en) | 2021-12-17 |
| CN113811648B CN113811648B (en) | 2024-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201980096329.3A Active CN113811648B (en) | 2019-05-13 | 2019-05-13 | Laundry machine and method for controlling such laundry machine |
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| Country | Link |
|---|---|
| EP (1) | EP3969649A1 (en) |
| CN (1) | CN113811648B (en) |
| AU (1) | AU2019445898A1 (en) |
| WO (1) | WO2020228941A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1010956S1 (en) * | 2021-07-02 | 2024-01-09 | Samsung Electronics Co., Ltd. | Washing machine |
| EP4386125A1 (en) * | 2022-12-14 | 2024-06-19 | Electrolux Appliances Aktiebolag | Laundry treatment appliance |
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| Publication number | Publication date |
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| CN113811648B (en) | 2024-01-02 |
| EP3969649A1 (en) | 2022-03-23 |
| AU2019445898A1 (en) | 2021-11-04 |
| WO2020228941A1 (en) | 2020-11-19 |
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