WO2024150928A1 - 드럼식 세탁기 - Google Patents
드럼식 세탁기 Download PDFInfo
- Publication number
- WO2024150928A1 WO2024150928A1 PCT/KR2023/019740 KR2023019740W WO2024150928A1 WO 2024150928 A1 WO2024150928 A1 WO 2024150928A1 KR 2023019740 W KR2023019740 W KR 2023019740W WO 2024150928 A1 WO2024150928 A1 WO 2024150928A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- support mechanism
- load
- tub
- drum
- washing machine
- 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.)
- Ceased
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Classifications
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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
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/18—Condition of the laundry, e.g. nature or weight
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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
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/26—Casings; Tubs
- D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
- D06F37/268—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups for suspension devices
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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
- D06F2103/02—Characteristics of laundry or load
- D06F2103/04—Quantity, e.g. weight or variation of weight
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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
- D06F2103/18—Washing liquid level
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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
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/22—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a horizontal axis
Definitions
- This disclosure relates to a drum-type washing machine.
- This disclosure relates to a drum-type washing machine capable of measuring the weight of laundry, etc. with high precision.
- the weight of laundry e.g., the amount of clothes
- the weight of the laundry can be estimated based on the moment of inertia obtained by rotating the drum containing the laundry. Additionally, if the amount of water supplied can be measured, it becomes possible to estimate the amount of fabric, and the washing performance can be further improved. However, the water supply amount cannot be measured using the above-described laundry weight measurement method based on the moment of inertia.
- Japanese Patent Laid-Open No. 5-146582 discloses a vertical washing machine equipped with a weight sensor on the leg portion of the washing machine main body. The weight sensor measures the weight of laundry put into the washing machine. Then, the water absorption amount of the laundry is measured from the relationship between the weight of the washing machine after water supply and the water level. The fabric quality of the laundry is determined from the relationship between this absorption amount and the amount of laundry.
- Japanese Patent Laid-Open No. 10-80594 also discloses a vertical washing machine capable of measuring the amount of laundry and water absorption.
- a water tank unit including a driving device is suspended from the main body via a hanging rod, and a pressure reducing element is installed between the stopper supporting the hanging rod and the support plate. The amount and absorption of laundry are measured from the change in weight of the water tank unit detected by the pressure reducing element.
- a drum-type washing machine may include a housing, a tub capable of storing water accommodated in the housing, and a drum rotatably accommodated within the tub.
- the tub is suspended from the housing by an upper support mechanism including one or more hanging springs.
- the tub is supported relative to the housing by a lower support mechanism including one or more dampers.
- a load detector detects a load acting on each of the upper support mechanism and the lower support mechanism.
- the control unit acquires the load of the tub based on the load detection result of the load detector.
- FIG. 1 is a schematic longitudinal cross-sectional view of a drum-type washing machine according to an embodiment of the present disclosure.
- Figure 2 is a schematic diagram of major internal members of a drum-type washing machine according to an embodiment of the present disclosure, viewed from the rear.
- Figure 3 is a schematic perspective view showing a portion of an upper support mechanism according to an embodiment of the present disclosure.
- Figure 4 is an enlarged view of a portion of the upper support bracket according to an embodiment of the present disclosure.
- Figure 5 is a cross-sectional view taken along line A-A of Figure 4.
- Figure 6 is an enlarged view of a portion of the lower support bracket according to an embodiment of the present disclosure.
- Figure 7 is a cross-sectional view taken along line B-B of Figure 6.
- Figure 8 is a diagram illustrating the circuit configuration of a load detector according to an embodiment of the present disclosure.
- Figure 9 is a diagram for explaining an example of the results of a verification test of load measurement accuracy.
- Figure 10 is a block diagram showing an embodiment of the relationship between the control unit and the components of the washing machine.
- a or B “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof.
- One (e.g. first) component is said to be “coupled” or “connected” to another (e.g. second) component, with or without the terms “functionally” or “communicatively”.
- any of the components can be connected to the other components directly (e.g. wired), wirelessly, or through a third component.
- Washing machines can perform washing, rinsing, dehydration, and drying operations.
- a washing machine is an example of a clothing processing device, and a clothing processing device is a concept that encompasses devices that wash clothes (objects to be washed and items to be dried), devices that dry clothes, and devices that can both wash and dry clothes. .
- the washing machine is a top-loading washing machine in which the laundry inlet for inserting or removing laundry is provided to face upward, or a front-loading washing machine in which the laundry inlet is provided to face forward.
- Washing machines according to various embodiments may include washing machines with loading methods other than top loading washing machines and front loading washing machines.
- a front-loading washing machine may include a dryer/drying machine capable of drying laundry stored inside a drum.
- a washing machine with a dryer function may include a hot air supply device for supplying high-temperature air into the drum and a condensation device for removing moisture from the air discharged from the drum.
- a dryer/washing machine may include a heat pump device. Washing machines according to various embodiments may include washing machines with washing methods other than those described above.
- Washing machines may include a housing that accommodates various components therein.
- the housing may be provided in the form of a box with a laundry inlet formed on one side.
- the washing machine may include a door for opening and closing the laundry inlet.
- the door may be rotatably mounted on the housing by a hinge. At least a portion of the door may be transparent or translucent so that the inside of the housing is visible.
- the washing machine may include a tub provided inside the housing to store water.
- the tub may be provided in a substantially cylindrical shape with a tub opening formed on one side, and may be placed inside the housing so that the tub opening corresponds to the laundry inlet.
- the tub may be connected to the housing by a damper.
- the damper can absorb vibration that occurs when the drum rotates and attenuate the vibration transmitted to the housing.
- the washing machine may include a drum provided to receive laundry.
- the drum may be placed inside the tub so that the drum opening provided on one side corresponds to the laundry inlet and the tub opening. Laundry may sequentially pass through the laundry inlet, tub opening, and drum opening to be contained inside the drum or taken out from the drum.
- the drum may rotate inside the tub to perform each operation according to the washing, rinsing, and/or dewatering operations.
- a plurality of holes are formed in the cylindrical wall of the drum so that water stored in the tub can flow into or out of the drum.
- the washing machine may include a drive device configured to rotate the drum.
- the driving device may include a driving motor and a rotating shaft for transmitting the driving force generated by the driving motor to the drum.
- the rotating shaft may penetrate the tub and be connected to the drum.
- the driving device may rotate the drum forward or backward to perform each operation according to the washing, rinsing, and/or dewatering, or drying cycle.
- the washing machine may include a water supply device configured to supply water to the tub.
- the water supply device may include a water supply pipe and a water supply valve provided in the water supply pipe.
- the water supply pipe may be connected to an external water supply source.
- the water supply pipe may extend from an external water source to the detergent supply and/or tub. Water can be supplied to the tub through a detergent supply device. Water can be supplied to the tub without going through the detergent supply device.
- the water supply valve can open or close the water supply pipe in response to an electrical signal from the control unit.
- the water valve can allow or block water from being supplied to the tub from an external water source.
- the water supply valve may include, for example, a solenoid valve that opens and closes in response to an electrical signal.
- the washing machine may include a detergent supply device configured to supply detergent to the tub.
- the detergent supply device may include a manual detergent supply device that requires the user to input detergent to be used each time washing, and an automatic detergent supply device that stores a large amount of detergent and automatically inputs a predetermined amount of detergent when washing.
- the detergent supply device may include a detergent box for storing detergent.
- the detergent supply device may be configured to supply detergent into the tub during the water supply process. Water supplied through the water supply pipe can be mixed with detergent via a detergent supply device. Water mixed with detergent can be supplied into the interior of the tub.
- Detergent is used as a term encompassing pre-wash detergent, main wash detergent, fabric softener, bleach, etc.
- the detergent box includes a pre-wash detergent storage area, main wash detergent storage area, fabric softener storage area, and bleach storage area. can be divided into
- the washing machine may include a drainage device configured to discharge water contained in the tub to the outside.
- the drain device may include a drain pipe extending from the bottom of the tub to the outside of the housing, a drain valve provided on the drain pipe to open and close the drain pipe, and a pump provided on the drain pipe. The pump can pump water from the drain pipe out of the housing.
- the washing machine may include a control panel disposed on one side of the housing.
- the control panel may provide a user interface for interaction between the user and the washing machine.
- the user interface may include at least one input interface and at least one output interface.
- At least one input interface may convert sensory information received from the user into an electrical signal.
- At least one input interface may include a power button, an operation button, a course selection dial (or course selection button), and a wash/rinse/spin setting button.
- the at least one input interface may include, for example, a tact switch, a push switch, a slide switch, a toggle switch, a micro switch, a touch switch, a touch pad, a touch screen, a jog dial, and/or a microphone, etc. You can.
- At least one output interface may visually or audibly convey information related to the operation of the washing machine to the user.
- At least one output interface may convey information related to the washing course, operating time of the washing machine, and wash settings/rinse settings/spin settings to the user. Information about the operation of the washing machine can be output through a screen, indicator, voice, etc.
- At least one output interface may include, for example, a Liquid Crystal Display (LCD) panel, a Light Emitting Diode (LED) panel, a speaker, etc.
- LCD Liquid Crystal Display
- LED Light Emitting Diode
- the washing machine may include a communication module for wired and/or wireless communication with an external device.
- the communication module may include at least one of a short-range communication module or a long-distance communication module.
- the communication module may transmit data to or receive data from an external device (e.g., server, user device, and/or home appliance).
- an external device e.g., server, user device, and/or home appliance.
- the communication module may establish communication with a server and/or a user device and/or a home appliance, and transmit and receive various data.
- the communication module may support establishment of a direct (eg, wired) communication channel or wireless communication channel between external devices, and performance of communication through the established communication channel.
- the communication module may be a wireless communication module (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (e.g., a local area network (LAN) communication module). , or a power line communication module).
- GNSS global navigation satellite system
- LAN local area network
- the corresponding communication module is a first network (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (e.g., a legacy cellular network, 5G network, It can communicate with external devices through a telecommunication network such as a next-generation telecommunication network, the Internet, or a computer network (e.g., LAN or WAN).
- a first network e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)
- a second network e.g., a legacy cellular network, 5G network
- a telecommunication network such as a next-generation telecommunication network, the Internet, or a computer network (e.g., LAN or WAN).
- a telecommunication network such as a next-generation telecommunication network, the Internet
- a computer network e
- the short-range wireless communication module includes a Bluetooth communication module, BLE (Bluetooth Low Energy) communication module, Near Field Communication module, WLAN (Wi-Fi) communication module, Zigbee communication module, It may include, but is not limited to, an infrared data association (IrDA) communication module, a Wi-Fi Direct (WFD) communication module, an ultrawideband (UWB) communication module, an Ant+ communication module, and a microwave (uWave) communication module. no.
- IrDA infrared data association
- WFD Wi-Fi Direct
- UWB ultrawideband
- Ant+ an Ant+ communication module
- uWave microwave
- the long-distance communication module may include a communication module that performs various types of long-distance communication and may include a mobile communication unit.
- the mobile communication unit transmits and receives wireless signals to at least one of a base station, an external terminal, and a server on a mobile communication network.
- the communication module may communicate with external devices such as servers, user devices, and other home appliances through a nearby access point (AP).
- An access repeater (AP) can connect a local area network (LAN) to which a washing machine or user device is connected to a wide area network (WAN) to which a server is connected.
- the washing machine or user device may be connected to the server via a wide area network (WAN).
- the control unit can control various components of the washing machine (e.g., drive motor, water valve).
- the control unit may control various components of the washing machine to perform at least one operation including water supply, washing, rinsing, and/or dehydration according to user input.
- the controller may control a drive motor to adjust the rotation speed of the drum, or control a water supply valve of the water supply device to supply water to the tub.
- the control unit may include hardware such as a CPU or memory, and software such as a control program.
- the control unit includes an algorithm for controlling the operation of components in the washing machine, at least one memory that stores data in the form of a program, and at least one device that performs the above-described operations using the data stored in the at least one memory.
- Memory and processor can each be implemented as separate chips.
- a processor may include one or two or more processor chips or may include one or two or more processing cores.
- the memory may include one or two or more memory chips, or may include one or two or more memory blocks. Additionally, the memory and processor may be implemented as a single chip.
- the weight of the water tank unit including a driving device such as a vibration suppressing weight and a drive motor may be very heavy. For this reason, it is not easy to install a pressure reducing element to withstand this weight and the structure may become complicated.
- drum-type washing machines have drums that rotate around a horizontal axis, so the water tank unit shakes significantly up and down during operation. Therefore, vibration cannot be completely suppressed simply by supporting the water tank unit by hanging it with a hanging rod.
- drum-type washing machines are usually provided with an attenuator whose one end is fixed to the housing and the other end is fixed to the water tank unit to suppress the translational movement of the water tank unit.
- the attenuator since the attenuator also shares the support of the water tank unit, it is necessary to install a pressure reducing element in the attenuator as well.
- both ends of the attenuator must be fixed from the viewpoint of vibration isolation, it is difficult to install a pressure reducing element in the attenuator. Therefore, it is difficult to adopt a laundry weight measurement structure using a pressure reducing element in a drum-type washing machine.
- the present disclosure provides a drum-type washing machine that can measure the amount of laundry or water supply with high precision.
- a drum-type washing machine that can measure the amount of laundry or water supply with high precision.
- FIG. 1 is a schematic longitudinal cross-sectional view of a drum-type washing machine according to an embodiment of the present disclosure.
- Figure 2 is a schematic diagram of major internal members of a drum-type washing machine according to an embodiment of the present disclosure, viewed from the rear.
- the drum-type washing machine is referred to as a washing machine (1).
- the washing machine 1 may be a so-called fully automatic washing machine configured to automatically perform a series of processes such as washing, rinsing, and dehydration.
- the washing machine 1 of this embodiment is not equipped with a drying processing function, it may be equipped with a drying function.
- the washing machine (1) includes a housing (2), a tub (3), a drum (4), a driving device (5), a water supply device (6), a drainage device (7), It may include a control unit 8, etc.
- the washing machine 1 may be equipped with a load detector (FIG. 4:50) that enables high-precision measurement of the weight of laundry or water contained in the drum 4.
- the load detector 50 will be described later.
- the housing 2 may have a substantially rectangular parallelepiped shape.
- the housing 2 may be formed by combining panels or the like to a frame forming a skeleton.
- a circular inlet 2a that is opened and closed by a door is provided on the front of the housing 2. Laundry enters and exits through the input port (2a).
- An operating unit 2b that the user operates to operate the washing machine 1 is provided above the inlet 2a.
- the manipulation unit 2b may include, for example, a switch, a display, etc.
- the tub 3 may be a cylindrical container with a bottom that can hold water.
- the tub 3 includes an annular front wall portion 3a provided with a tub opening of approximately the same diameter as the inlet 2a, a disk-shaped rear wall portion 3b opposing the front wall portion 3a, and a cylindrical shape sandwiched between them. It may be provided with a body wall portion 3c.
- the tub 3 is accommodated in the housing 2 with the front wall portion 3a facing forward.
- a water level sensor (FIG. 10: 9) may be installed in the tap 3 to measure the water level therein.
- the front wall portion 3a is connected to the front of the housing 2 through an elastically deformable annular sealing member 10, and the space between the inlet 2a and the tub 3 is sealed by the sealing member 10.
- a driving device 5 is assembled to the rear wall portion 3b. The driving device 5 will be described in detail later.
- the tub 3 may be integrated with the driving device 5.
- a balancer (weight) is mounted on the tub 3 to adjust the position of the center of gravity of the tub 3 and suppress vibration.
- the tub (3) becomes heavier.
- the drum 4 containing the laundry rotates inside the tub 3, the heavy tub 3 shakes greatly inside the housing 2.
- the tub 3 is elastically supported on the housing 2 through a buffer support mechanism.
- a pair of beam members 2c are installed inside the housing 2.
- a pair of beam members 2c is disposed in the upper region of the housing 2.
- a pair of beam members 2c are arranged to be spaced apart in the transverse direction, for example, in the left and right direction.
- An upper support bracket 21 (first bracket) is installed at the center of the pair of beam members 2c in the front-back direction.
- the body wall portion 3c is provided with a vertical rib 3d on the outer periphery.
- the vertical rib 3d is provided at the center of the body wall portion 3c in the front-back direction.
- the vertical rib 3d extends along the outer periphery of the body wall 3c from the top to the side of the body wall 3c.
- Upper support brackets 22 (first brackets) are installed on the upper right and upper left sides of the vertical rib 3d, respectively.
- a hanging spring 23 is installed between the left and right upper support brackets 21 and the upper support brackets 22.
- the hanging spring 23 may be a tension coil spring whose one end and the other end are connected to the upper support bracket 21 and the upper non-support bracket 22, respectively.
- a lower support bracket 31 (second bracket) is installed in the lower area inside the housing 2, for example on the floor.
- lower support brackets 31 may be installed at four locations on the front left and right and rear left and right sides of the bottom of the housing 2, respectively.
- Four lower support brackets 31 and four corresponding lower support brackets 32 (second brackets) are provided at the lower part of the body wall portion 3c.
- Four lower supporting brackets 32 may be provided on the front left and right and rear left and right sides of the lower part of the body wall portion 3c, respectively.
- a damper 33 is mounted between the four lower support brackets 31 and the corresponding four lower support brackets 32. As the damper 33, a friction damper may be used as will be described later.
- the tub 3 is suspended from the housing 2 by two hanging springs 23, so that the upper side is elastically supported with respect to the housing 2. Additionally, the tub 3 is supported by four dampers 33 so that its lower side is supported by friction against the housing 2. That is, the two hanging springs 23 form the upper support mechanism 20 (buffer support mechanism), and the four dampers 33 form the lower support mechanism 30 (buffer support mechanism).
- the upper support mechanism 20 and the lower support mechanism 30 are multi-points including two or more hanging springs 23 and two or more dampers 33, respectively. It is a support organization.
- the upper support mechanism 20 is mainly responsible for supporting the tub 3.
- the main purpose of the lower support mechanism 30 is to suppress vibration, and the support of the tub 3 relative to the housing 2 is auxiliary (i.e., most of the load of the tub 3 is received by the upper support mechanism 20). there is).
- a water supply device 6 is installed on the upper part of the housing 2 to supply water to the tub 3 from an external water supply facility, etc.
- the water supply device 6 may be equipped with an electromagnetic opening/closing valve, a water supply hose, etc.
- the drain device 7 is provided with a drain hose 7a.
- a drain (not shown) is installed at the bottom of the tub (3).
- a drain hose 7a is connected to the drain port.
- the end of the drain hose 7a is exposed to the outside of the housing 2.
- a pump (not shown) for draining water may be installed in the drain hose 7a.
- the drum 4 may be a cylindrical container with a bottom slightly smaller than the tub 3.
- the drum 4 has a front portion 4a provided with a circular opening 4d, and a rear portion opposing the front portion 4a. (4b) and a cylindrical peripheral surface portion (4c) connecting them.
- the drum 4 is accommodated in the tub 3 with the front portion 4a facing forward, for example, in the front-back direction.
- the drum 4 and the tub 3 are arranged so that their respective center lines coincide.
- the inlet 2a of the housing 2, the tub opening, and the opening 4d of the drum 4 communicate with each other in the front-back direction.
- a plurality of water-through holes 4e are formed as a whole in the peripheral surface portion 4c (only a portion of the water-through holes 4e is shown in FIG. 2).
- the driving device 5 may include a shaft member 5a, a motor 5b, a main pulley 5c, and a sub pulley 5d.
- the shaft member 5a is installed in the central portion of the wall portion 3b.
- the shaft member 5a may include a shaft 5a1 and a bearing 5a2.
- the shaft 5a1 extends forward and backward through the rear wall portion 3b of the tub 3.
- the shaft may be rotatably supported in a bearing housing 5a3 provided on the rear wall 3b of the tub 3 via a bearing 5a2.
- the front end of the shaft 5a1 may be fixed to a boss provided in the central portion of the rear portion 4b of the drum 4. As a result, the drum 4 can be rotated around the substantially horizontal rotation axis J inside the tub 3.
- the motor 5b may be disposed inside the housing 2 at the lower and rear side with respect to the tub 3.
- a small-diameter sub-pulley 5d is fixed to the output shaft of the motor 5b.
- a large-diameter main pulley 5c is fixed to the rear end of the shaft 5a1.
- An endless belt 5e is installed between the sub pulley 5d and the main pulley 5c.
- the drum 4 may be rotated by driving the motor 5b.
- the control unit 8 comprehensively controls the operation of the washing machine 1 according to the operation on the operation unit 2b.
- the control unit 8 can control the operation of the driving device 5, the water supply device 6, and the drain device 7 to execute a series of processes including washing, rinsing, and dehydration.
- the control unit 8 may include hardware such as a central processing unit (CPU) and memory, and software such as a control program.
- the control unit 8 performs the above-described operations using an algorithm for controlling the operation of components in the washing machine, at least one memory that stores data in the form of a program, and data stored in the at least one memory.
- It may include at least one processor 8a.
- the memory and processor 8a may each be implemented as separate chips.
- the processor 8a may include one or two or more processor chips or may include one or two or more processing cores.
- the memory may include one or two or more memory chips, or may include one or two or more memory blocks. Additionally, the memory and processor 8a may be implemented as a single chip.
- the control unit 8 for example, the processor 8a, measures the weight of laundry contained in the drum 4 based on the detection results of the load detector (FIG. 4: 50) and the water level sensor (FIG. 10: 9) ( It can be configured to improve washing performance by executing a process to measure the amount of clothes (clothes quantity measurement process) or a process to estimate the fabric of the laundry (cloth estimation process). This will be explained in detail later.
- the washing machine 1 is equipped with a load detector 50 to measure the weight of laundry or water contained in the drum 4.
- the control unit 8, for example, the processor 8a acquires the load of the tub 3 based on the detection result of the load detector 50.
- the load detector 50 detects the load acting on each of the upper support mechanism 20 and the lower support mechanism 30 in order to increase measurement accuracy.
- the upper support mechanism 20 and the lower support mechanism 30 each have brackets (first bracket and second bracket) for connecting the hanging spring 23 and damper 33 to the housing 2 and the tub 3. Equipped with
- the load detector 50 includes a plurality of load cells (a first load cell (FIG. 4: 51) and a second load cell (FIG. 7: 52)) assembled on a bracket, for example a first and a second bracket, respectively. can do.
- Each load cell is installed on the strain-producing body and a strain-producing body interposed between the holder to which the hanging spring 23 or damper 33 is connected and the housing 2 or tub 3. It may be provided with one or more strain gauges that measure the amount of deformation of the distorted body.
- Figure 3 is a schematic perspective view showing a portion of the upper support mechanism 20 according to an embodiment of the present disclosure.
- Figure 4 is an enlarged view of a portion of the upper support bracket 21 according to an embodiment of the present disclosure.
- Figure 5 is a cross-sectional view taken along line A-A of Figure 4. 3 to 5, the upper support bracket 21 may include a first spacer 21a and a first load cell 51.
- the first load cell 51 may include a first holder 21b, a first strain-producing body 51a, and a first strain gauge 51b.
- the first holder 21b is a member for connecting the hanging spring 23.
- the first holder 21b is provided with a support concave portion 21c that is concave from top to bottom and has rounded edges on both sides.
- the hook portion 23a bent into an inverted U shape of the hanging spring 23 is caught in the support concave portion 21c.
- the hook portion 23a of the hanging spring 23 is in surface contact or line contact with the support concave portion 21c including two rounded edges as shown in FIGS. 3 and 5, and hanging due to vibration Translational movement of the spring 23 can be suppressed.
- the first distorted body 51a may be a rectangular thin plate member.
- a locking opening 51c is formed in the center of the first distorted body 51a.
- the first holder 21b may be mounted over the lower end of the catching opening 51c.
- the upper end of the first distorted body 51a may be fixed to the beam member 2c with a bolt through the first spacer 21a.
- one end, that is, the upper end, of the first distorted body 51a is supported by the beam member 2c, and is interposed between the first holder 21b and the housing 2.
- the hook portion 23a of the hanging spring 23 is inserted into this locking opening 51c and is caught in the support concave portion 21c. Therefore, when a load acts on the hanging spring 23, the lower end of the first distorted body 51a bends in the left and right directions starting from the upper end.
- the first load cell 51 includes two first strain gauges 51b.
- One first strain gauge (51b) may be installed on both sides of the first strained body (51a) to measure the strain on both the expansion and contraction sides according to the bending of the first strained body (51a).
- a total of two first brackets are provided, one on each side of the housing 2, and the first load cell 51 is disposed on each of the two first brackets, so there are a total of four first strain gauges 51b. .
- Figure 6 is an enlarged view of a portion of the lower support mechanism 30, that is, the lower support bracket 31, according to an embodiment of the present disclosure.
- Figure 7 is a cross-sectional view taken along line B-B of Figure 6.
- the lower support bracket 31 may include a second spacer 31a and a second load cell 52.
- the second load cell 52 may include a second holder 31b, a second strain gauge 52a, and a second strain gauge 52b.
- a stepped portion 2e stepped downward may be provided at a portion of the bottom plate 2d of the housing 2 where the four lower support brackets 31 are installed.
- the second distorted body 52a may be a rectangular thin plate member.
- the second distorted body 52a has one end located outside the step portion 2e and the other end extending from one end onto the step portion 2e.
- One end of the second distorted body 52a is fastened and fixed to the bottom plate 2d of the housing 2 with a bolt on the outside of the step portion 2e.
- the other end of the second distorted body 52a is positioned to be spaced upward from the bottom plate 2d of the housing 2 inside the step portion 2e.
- the second holder 31b may include, for example, a rectangular thin plate-shaped base portion 31c and a pair of support portions 31d and 31d protruding upward from the two long sides of the base portion 31c. .
- the base portion 31c is disposed to overlap the second distorted body 52a.
- One end of the base portion 31c is fastened to the other end of the second distorted body 52a with a bolt via the second spacer 31a.
- the second distorted body 52a is supported at one end by the bottom plate 2d and at the other end by the second holder 31b, and is interposed between the second holder 31b and the housing 2.
- a pivot support portion (31e) is provided on each of the pair of support portions (31d).
- the pivot support portion 1e is provided in the support portion 31d at a position biased toward the other end of the base portion 31c, that is, toward one end of the second strained body 52a.
- the damper 33 is pivotably supported on the pivot support portion 31e. When a load acts on the damper 33, the second strained body 52a is bent into an S shape.
- the second load cell 52 includes one second strain gauge 52b.
- a second strain gauge (52b) may be installed on the lower or upper surface of the second strained body (52a) to measure the strain on the extension side or contraction side according to the bending of the second strain gauge (52a). You can. In FIG. 7, the second strain gauge 52b is installed on the contraction side of the second strained body 52a.
- a total of four second brackets are provided on the front, rear, left, and right sides of the housing 2, and the second load cell 52 is disposed on each of the four second brackets, so the second strain gauge 52b has a total of There are four.
- the weight of the laundry is estimated based on the moment of inertia by rotating the drum containing the laundry. Additionally, if the water supply amount (the amount of water supplied to the tub 3) can be measured, the fabric of the laundry can be estimated based on the measurement result, and laundry can be performed according to the fabric. Accordingly, washing performance can be improved.
- the tub Since the tub is suspended from the housing, a method of measuring the weight of the tub by mounting a weight sensor on the area where the tub is suspended may be considered.
- the tub is very heavy and becomes even heavier when watering.
- the tub In the case of a drum-type washing machine, since the tub shakes up and down during operation, the tub not only hangs on the housing, but is also supported on the housing through a damper to suppress vibration. Therefore, in order to measure the weight of the tub with high precision, it is necessary to consider the influence of the damper.
- relatively inexpensive friction dampers are often used as dampers. When a load exceeding the maximum static friction force is applied to the friction damper, it expands and contracts while opposing the load with friction force.
- a friction damper is also employed as the damper 33 in the washing machine 1 of this embodiment.
- the damper 33 When laundry is placed in the drum (4), the position of the tub (3) moves down due to the weight of the laundry. Accordingly, the damper 33 is compressed.
- the friction force of the damper 3 acts not only in the direction in which the damper 33 is compressed, but also in the opposite direction. Therefore, the load acting on the hanging spring 23 becomes as small as the friction force.
- the position of the tub 3 rises, so the load acting on the hanging spring 23 becomes as large as the friction force of the damper 33.
- the location and amount of laundry accommodated in the drum 4 may vary.
- the user's force may act on the drum 4 and the drum 4 may be pressed. Accordingly, the movement of the tub 3 before starting washing is not the same or constant. Accordingly, the manner in which the frictional force of each of the four dampers 33 arranged on the front, rear, left, and right sides acts on each of the two hanging springs 23 is not constant. Therefore, the load on the tub 3 cannot be measured with high precision unless the influence of the damper 33 is taken into consideration. That is, the frictional force of the damper 33 acts as hysteresis on the load acting on the hanging spring 23, deteriorating measurement accuracy.
- a load cell is assembled to the support portion of the damper 33 (specifically, the second bracket) to measure friction force. Then, the measurement result is applied to the load measurement result of the tub 3 at the connection portion of the hanging spring 23 (specifically, the first bracket).
- load cells (first load cell 51 and second load cell 52) are disposed on both the first bracket and the second bracket, so that a plurality of hanging springs 23 and a plurality of dampers 33
- the load (directly deformation caused by the load) acting on both the upper support mechanism 20 and the lower support mechanism 30 is measured based on the load acting on both. Therefore, the weight of the tub 3 can be measured with high precision.
- the upper support mechanism 20 and the lower support mechanism 30 each include four strain gauges (the first strain gauge 51b and the second strain gauge 52b).
- the load detector 50 forms a first wheatstone bridge circuit (FIG. 8: 61) with four strain gauges (first strain gauge 51b) included in the upper support mechanism 20, and the lower side
- the strain gauge (second strain gauge 52b) included in the support mechanism 30 constitutes a second Wheatstone bridge circuit (FIG. 8: 62).
- FIG. 8 is a diagram illustrating the circuit configuration of the load detector 50 according to an embodiment of the present disclosure.
- the load detector 50 uses the so-called 4-gauge method, which is advantageous for output, to measure the amount of deformation in each of the upper support mechanism 20 and the lower support mechanism 30, that is, the first and second distortion bodies. Measure the amount of deformation (51a, 52a).
- the upper left circuit is the first Wheatstone bridge circuit 61
- the lower left circuit is the second Wheatstone bridge circuit 62.
- the first and second Wheatstone bridge circuits 61 and 62 are connected to the control unit 8, for example, the processor 8a, through the amplifier 63.
- the resistance of the first strain gauge (51b) and the second strain gauge (52b) changes according to the bending of the first holder (51a) and the second holder (52a). Accordingly, the first strain gauge 51b and the second strain gauge 52b can be equivalent to resistance elements in the circuit configuration of the load detector 50.
- R1 and R3 represent two first strain gauges 51b of the first load cell 51 installed on one of the two upper support brackets 21.
- R2 and R4 represent the two first strain gauges 51b of the first load cell 51 installed on the other of the two upper support brackets 21.
- R1 and R4 each represent a first strain gauge 51b installed on the surface facing the inside of the housing 2 of the first holder 51a.
- R2 and R3 1 represent the first strain gauge 51b installed on the outer surface of the housing 2 of the holder 51a.
- a predetermined voltage (applied voltage) is input between P1 and P2 of the first Wheatstone bridge circuit 61, and the voltage (output voltage) between P3 and P4 is output to the amplifier 63.
- the output voltage is amplified by the amplifier 63 and then converted into a first measured voltage value (Vb) (first signal) corresponding to the amount of deformation of the first distortion body 51a and sent to the control unit 8, for example, a processor ( It is output in 8a).
- a second load cell 52 including one second strain gauge 52b is installed on each of the four lower support brackets 31. Accordingly, R5 to R8 of the second Wheatstone bridge circuit 62 represent each of the four second strain gauges 52b of the second load cells 52 installed on each of the four lower support brackets 31.
- R5 and R8 facing each other are contracted, R6 and R7 facing each other are extended. Conversely, when R5 and R8 are stretched, R6 and R7 are contracted.
- a predetermined voltage (applied voltage) is input between P5 and P6 of the second Wheatstone bridge circuit 62, and the voltage (output voltage) between P7 and P8 is output to the amplifier 63.
- the output voltage is amplified by the amplifier 63 and then converted to a second measured voltage value (Vd) (second signal) corresponding to the amount of deformation of the second distorted body 52a and sent to the control unit 8, for example, a processor ( It is output in 8a).
- Vd second measured voltage value
- the processor 8a acquires the load on the tub 3 based on the measured values of the strain gauges.
- the control unit 8, for example, the processor 8a loads the tub 3 based on the first measured voltage value (Vb) and the second measured voltage value (Vd) input from the amplifier 63. acquire.
- the control unit 8, for example, the processor 8a controls the load applied to the upper support mechanism 20 and the lower support mechanism based on both the first measured voltage value (Vb) and the second measured voltage value (Vd).
- the load acting on (30) can be calculated, and the load on the tub (3) can be obtained by adding them all together.
- the correction process may be a process of multiplying one or both of the first measured voltage value (Vb) and the second measured voltage value (Vd) by a real number.
- the measurement sensitivity may be different.
- the measurement sensitivities of the plurality of first and second load cells 51 and 52 may be different.
- a predetermined coefficient (sensitivity coefficient) that matches the measured sensitivities for each of the upper support mechanism 20 and the lower support mechanism 30 can be obtained in advance through experiment or the like.
- the sensitivity coefficient may be stored in memory, for example.
- the sensitivity coefficient is multiplied by one or both of the first measurement voltage value (Vb) and the second measurement voltage value (Vd) to match the measurement sensitivity in measuring the deformation amount of the upper support mechanism 20 and the lower support mechanism 30. You can do it. By doing this, the detection accuracy of the load can be improved.
- Figure 9 is a diagram for explaining an example of the results of a verification test of load measurement accuracy. Ten weights of 600 g were placed in the drum (4) as a dummy of laundry and taken out, and the amount of deformation of the first strained body (51a) and the second strained body (52a) according to the change in the load of the tub (3) was measured. do.
- the vertical axis represents the amount of deformation, and the unit is microstrain ( ⁇ ST).
- the graph (G1) shows the change in the amount of deformation according to the change in the load on the hanging spring 23 side
- the graph (G2) shows the change in the amount of deformation according to the change in the load on the damper 33 side.
- the graph (G3) shows the change when the graph (G1) and graph (G2) are corrected and added together.
- the scale of the amount of deformation on the vertical axis is different in each graph (G1, G2, and G3).
- the scale of the vertical axis of the graph G1 is smaller than the scale of the vertical axis of the graph G2.
- the graph (L1) consisting of a circular plot and a solid line shows the change in the amount of deformation when the weight is inserted into the drum (4)
- the graph (L2) consisting of a square plot and a dotted line shows the change in the amount of deformation when the weight is taken out. indicates.
- FIG 10 is a block diagram showing an embodiment of the relationship between the control unit 8 and the components of the washing machine 1.
- the control unit 8 may include, as a functional component, an operation control unit 8a, a laundry weight measurement unit 8b, a water supply amount measurement unit 8c, and a cloth estimation unit 8d.
- the operation control unit 8a comprehensively controls the operation of the washing machine 1 according to the operation input through the operation unit 2b. That is, the control unit 8 controls the operation of the driving device 5, the water supply device 6, and the drain device 7 to execute a series of processes including washing, rinsing, and dehydration.
- the laundry weight measuring unit 8b measures the weight of the laundry (clothes amount measurement process) based on the signal input from the load detector 50. Specifically, the laundry weight measuring unit 8b measures the weight of the laundry based on the change in load on the tub 3 when laundry is put into the drum 4. As described above, since the load on the tub 3 can be measured with high precision by the load detector 50, the weight of laundry can be measured with high precision.
- the water amount measuring unit 8c measures the amount of water supplied based on the signal input from the load detector 50 (water amount measurement processing). Specifically, when water is supplied to the tub 3 during the washing cycle or rinsing cycle, the laundry weight measuring unit 8c measures the amount of water supplied from the change in the load on the tub 3 accordingly. As described above, since the load on the tub 3 can be measured with high precision by the load detector 50, the water supply amount can be measured with high precision. Since the water supply amount can be controlled depending on the laundry, washing performance and water saving can be improved.
- the cloth estimation unit 8d performs cloth estimation processing as described above. Specifically, the cloth estimation unit 8d measures the change in the water level of the tub 3 from the water level sensor 9. Then, the water absorbency of the laundry is determined from changes in the water supply amount and water level, and the cloth estimation unit 8d estimates the cloth from the water absorbency. Depending on the fabric, the amount of rinsing water or spin-drying time can be optimally controlled.
- the washing machine 1 generally includes a plurality of hanging springs 23 and/or dampers 33 to support the tub 3 at multiple points (multi-point support mechanism).
- the structure supporting the tub 3 is not limited to this.
- Either the upper support mechanism 20 or the lower support mechanism 30 may not be a multi-point support mechanism. That is, there may be only one hanging spring 23 or damper 33.
- the load cells and strain gauges can be arranged in accordance with the support structure.
- a load cell can be installed on the bracket to which the hanging spring 23 is connected, that is, the first bracket.
- the load cell since one load cell is installed on the first bracket, for example, the load cell may be provided with one strained body and four strain gauges that measure the strain of the strained body.
- a load cell can be installed on the bracket to which the damper 33 is connected, that is, the second bracket.
- the load cell since one load cell is installed on the second bracket, for example, the load cell may be equipped with one strained body and four strain gauges that measure the strain of the strained body. In this way, high-precision strain measurement can be performed by the four-bridge method using a Wheatstone bridge circuit.
- one load cell is installed on both brackets on the multi-point support mechanism side, that is, on the side where there are two, and a strain gauge is installed on each load cell. You can install two at a time. Of course, it is also possible to install a load cell with four strain gauges on some of the two brackets, for example, on one bracket. In this way, the cost of absence can be reduced.
- load cells can be installed one by one on the three brackets on the multi-point support mechanism side, that is, on the side with three pieces, and a strain gauge can be installed on each load cell.
- one of the four resistors of the Wheatstone bridge circuit may be a fixed resistor to match the sensitivity of each transmission path.
- load cells may be installed one by one on some of the three brackets, for example, on two brackets.
- one load cell can be installed on each of the brackets (front bracket and rear bracket) that are spaced apart in the front and back directions. Since the drum 4 rotates, weight bias in the left and right directions rarely occurs, but weight bias in the front and back directions easily occurs. Therefore, from the viewpoint of accuracy, it is more effective to calculate the load acting on the entire tub 3 based on the load of the two support points in the front and back directions rather than the load of the two support points in the left and right directions of the tub 3.
- one load cell can be installed on each of the four brackets on the multi-point support mechanism side, that is, on the side with four pieces, and one strain gauge can be installed on each load cell. there is. It is effective in terms of accuracy because the load acting on the entire tub 3 is calculated based on the load in the front-back and left-right directions of the tub 3.
- load cells may be installed one by one on some of the four brackets, for example, three or fewer brackets. In this case, as described above, one load cell can be installed on each of the two brackets (front bracket and rear bracket) located spaced apart in the front and rear direction.
- Each of the upper support mechanism 20 and the lower support mechanism 30 may include four or more strain gauges. That is, the load detector 50 includes a plurality of strain gauges, including four or more strain gauges that detect the load acting on the upper support mechanism 20 and four or more strain gauges that detect the load acting on the lower support mechanism 30. It may contain four or more strain gauges that detect load. In this way, high-precision strain measurement can be performed by the four-bridge method using a Wheatstone bridge circuit.
- the control unit 8 for example, the processor 8a, which comprehensively controls the washing machine 1, determines the load of the tub 3 based on the detection result of the load detector 50.
- the load is measured from the amount of deformation by a control device or control circuit separate from the control unit 8, for example, the processor 8a, and the control unit 8, for example, the processor 8a, obtains the measurement result.
- the control unit 8, for example, the processor 8a may include a control unit that comprehensively controls the washing machine 1 and a control unit that detects the load on the tub 3.
- the load cell is installed on a bracket on the side of the housing (2), but it may also be installed on a bracket on the side of the tub (3).
- the damper 33 is not limited to a friction damper and may be an oil damper.
- the components of the washing machine 1, such as the driving device 5 described above, are exemplary and may be changed depending on the specifications of the washing machine 1.
- a drum-type washing machine may include a housing, a tub capable of storing water accommodated in the housing, and a drum rotatably accommodated within the tub.
- the tub is suspended from the housing by an upper support mechanism including one or more hanging springs.
- the tub is supported relative to the housing by a lower support mechanism including one or more dampers.
- a load detector detects a load acting on each of the upper support mechanism and the lower support mechanism.
- the processor acquires the load of the tub based on the load detection result of the load detector.
- the tub in which the rotating drum is accommodated is supported in the housing by a buffer mechanism including an upper support mechanism with a hanging spring and a lower support mechanism with a damper. Therefore, due to the high weight, vertical vibration of the tub is suppressed and the tub can be stably supported in the housing. Since the load acting on the hanging spring by the tub is affected by the damper, the load on the tub cannot be measured with high precision by measuring only the load acting on the upper support mechanism.
- the load detector detects the load acting on both the upper support mechanism and the lower support mechanism, and the processor acquires the load of the tub based on the detection result of the load detector.
- the influence of the damper can be suppressed, and the load of the tub, and by extension the weight of the laundry or water supply amount based on the load of the tub, can be measured with high precision. As a result, efficient washing can be performed.
- the upper support mechanism and the lower support mechanism each include a bracket for connecting the hanging spring or the damper to the housing and the tub
- the load detector includes a load cell installed on the bracket. can do. Since the load cell is installed on the bracket of the upper support mechanism and the lower support mechanism and the load cell is integrated with the bracket, installation of the load detector is easy even if there is not enough space inside the housing.
- the load cell includes a strained body interposed between a holder to which the hanging spring or the damper is connected and the housing or the tub, and a strained body installed on the strained body to measure the amount of deformation of the strained body.
- the above strain gauges may be provided.
- the processor may acquire the load of the tub based on the measured value of the strain gauge. Accordingly, the load cell can be easily assembled to the brackets of the upper and lower support mechanisms, thereby reducing manufacturing costs.
- the load detector may include a first Wheatstone bridge circuit including a strain gauge of a load cell installed on the upper support mechanism and a second Wheatstone bridge circuit including a strain gauge of a load cell installed on the lower support mechanism. can be provided.
- the processor may obtain the load of the tub by adding the first and second signals output from the first and second Wheatstone bridge circuits.
- the processor may perform correction processing to multiply at least one of the first and second signals by a real number.
- measurement errors due to differences in measurement sensitivities can be corrected in the process of detecting the amount of deformation of the upper and lower support mechanisms.
- the measurement sensitivity in the deformation measurement of the upper support mechanism and the lower support mechanism can be matched, and since the voltage value indicating the influence of the damper matches each other on the hanging spring side and the damper side, the corrected first and second The voltage value due to the effect of the damper can be offset by signal addition processing. Therefore, in measuring the load of the tub, measurement errors due to the influence of the damper can be corrected.
- At least one of the upper support mechanism and the lower support mechanism may be a multi-point support mechanism including two or more hanging springs or two or more dampers.
- the load cell may be installed on two or more brackets of the upper support mechanism and the lower support mechanism that are the multi-point support mechanism.
- the load cell may be installed on some of two or more brackets of the upper support mechanism and the lower support mechanism that are the multi-point support mechanism.
- At least one of the upper support mechanism and the lower support mechanism is a multi-point support mechanism including four of the hanging springs or four of the dampers, and the multi-point support mechanism of the upper support mechanism and the lower support mechanism
- a load cell including one strain gauge may be installed on each of the four brackets on the inner side. Since all deformations of the bracket can be measured using the 4-gauge method using the minimum necessary load cells and strain gauges, member costs can be suppressed and measurement precision can be improved.
- At least one of the upper support mechanism and the lower support mechanism is a multi-point support mechanism including three or more of the hanging springs or three or more of the dampers, and the multi-point of the upper support mechanism and the lower support mechanism is
- the three or more brackets on the support mechanism side include a front bracket and a rear bracket that are spaced apart in the front and rear direction, and one load cell may be installed on each of the front bracket and the rear bracket. Since the drum rotates, weight bias is more likely to occur in the front-to-back direction than the left-right direction.
- brackets for assembling a load cell it is advantageous from the viewpoint of accuracy to select the brackets to be spaced apart in the front and rear directions and obtain the load acting on the entire tub based on the load on both front and rear ends rather than the load on both left and right sides of the tub. And the load on the tub can be measured efficiently and with high precision.
- the drum-type washing machine may further include a water level sensor 9 that measures the water level in the tub.
- the processor may execute a clothes quantity measurement process to measure the weight of laundry stored in the drum and a cloth estimation process to estimate the fabric of the laundry based on the detection results of the load detector and the water level sensor.
- the weight of laundry and the water supply amount can be measured with high precision. It is possible to evaluate the water absorbency of laundry with high precision from water level changes by the water level sensor, the weight of the laundry, and the amount of water supplied, and the fabric of the laundry can be estimated with high precision from the absorbency. If the fabric can be estimated, the rotation of the drum can be controlled according to the fabric, thereby improving washing performance.
- the load detector includes a plurality of strain gauges, wherein the plurality of strain gauges include four or more strain gauges that detect a load acting on the upper support mechanism and a load acting on the lower support mechanism. It may include four or more strain gauges to detect. According to this, high-precision strain measurement can be performed by the four-bridge method using a Wheatstone bridge circuit.
- the drum-type washing machine includes two upper support mechanisms that hang on the housing at the center of the tub in the front-back direction and on both sides in the left and right directions, respectively; It may include four lower support mechanisms that support the front side of the tub and both sides in the left and right directions, and the rear side of the tub and both sides in the left and right directions, respectively, with respect to the housing.
- the load detector includes two first load cells installed on each of the two upper support mechanisms, each having two first strain gauges; It may include four second load cells installed on each of the four lower support mechanisms, each having one second strain gauge.
- each of the two first load cells may include a first strained body that is bent by a load acting on the hanging spring.
- the two strain gauges of each of the two first load cells may be disposed on both sides of the first strained body so as to measure strain on a contraction side and an extension side of the first strained body.
- Each of the four second load cells may be provided with a second mechanical strain that is bent by the load acting on the damper.
- the one strain gauge of each of the four second load cells may be disposed on one surface of the second strained body to measure strain on either the contracted side or the extended side of the second strained body.
- the load detector includes: a first Wheatstone bridge circuit including the four first strain gauges; A second Wheatstone bridge circuit including the four second strain gauges may be provided.
- the processor may obtain the load of the tub by adding the first and second signals output from the first and second Wheatstone bridge circuits.
- the processor may perform correction processing to multiply at least one of the first and second signals by a real number.
- the weight and water supply of laundry can be measured with high precision, and effective washing is possible based on the measured weight and water supply of laundry.
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Abstract
Description
Claims (15)
- 하우징(2);상기 하우징에 수용된 저수 가능한 터브(3);상기 터브 내부에 회전가능하게 수용된 드럼(4);상기 하우징에 상기 터브를 매다는 하나 이상의 행잉 스프링(23)을 포함하는 상측 지지 기구(20);상기 하우징에 대하여 상기 터브를 지지하는 하나 이상의 댐퍼(33)를 포함하는 하측 지지 기구(30);상기 상측 지지 기구와 상기 하측 지지 기구 각각에 작용하는 하중을 검출하는 하중 검출기(50);상기 하중 검출기의 하중 검출 결과에 기초하여 상기 터브의 하중을 취득하는프로세서(8a);를 포함하는 드럼식 세탁기.
- 제1항에 있어서,상기 상측 지지 기구와 상기 하측 지지 기구 각각은 상기 행잉 스프링 또는 상기 댐퍼를 상기 하우징과 상기 터브에 연결하기 위한 브라켓(21, 22, 31, 32)을 구비하며,상기 하중 검출기는 상기 브라켓에 설치되는 로드 셀(51, 52)을 구비하는 드럼식 세탁기.
- 제2항에 있어서,상기 로드 셀은,상기 행잉 스프링 또는 상기 댐퍼가 연결되는 홀더(21b, 31b)와 상기 하우징 또는 상기 터브의 사이에 개재되는 기왜체(51a, 52a);상기 기왜체에 설치되어 상기 기왜체의 변형량을 계측하는 하나 이상의 스트레인 게이지(51b, 52b);를 구비하며,상기 프로세서(8a)는 상기 스트레인 게이지의 계측값에 기초하여 상기 터브의 하중을 취득하는 드럼식 세탁기.
- 제3항에 있어서,상기 하중 검출기는,상기 상측 지지 기구에 설치된 로드 셀의 스트레인 게이지(51b)를 포함하는 제1 휘트스톤 브릿지 회로(61);상기 하측 지지 기구에 설치된 로드 셀의 스트레인 게이지(52b)를 포함하는 제2 휘트스톤 브릿지 회로(62);를 구비하며,상기 프로세서는 상기 제1 및 제2 휘트스톤 브릿지 회로로부터 출력되는 제1 및 제2 신호를 합산하여 상기 터브의 하중을 취득하는 드럼식 세탁기.
- 제4항에 있어서,상기 프로세서는 상기 제1 및 제2 신호 중 적어도 하나를 실수배하는 보정 처리를 수행하는 드럼식 세탁기.
- 제4항에 있어서,상기 상측 지지 기구와 상기 하측 지지 기구 중 적어도 하나는 2개 이상의 상기 행잉 스프링 또는 2개 이상의 상기 댐퍼를 포함하는 다점 지지 기구이며,상기 상측 지지 기구와 상기 하측 지지 기구 중 상기 다점 지지 기구인 쪽의 2개 이상의 브라켓 모두에 상기 로드 셀이 설치되는 드럼식 세탁기.
- 제4항에 있어서,상기 상측 지지 기구와 상기 하측 지지 기구 중 적어도 하나는 2개 이상의 상기 행잉 스프링 또는 2개 이상의 상기 댐퍼를 포함하는 다점 지지 기구이며,상기 상측 지지 기구와 상기 하측 지지 기구 중 상기 다점 지지 기구인 쪽의 2개 이상의 브라켓 중 일부에 상기 로드 셀이 설치되는 드럼식 세탁기.
- 제4항에 있어서,상기 상측 지지 기구와 상기 하측 지지 기구 중 적어도 하나는 4개의 상기 행잉 스프링 또는 4개의 상기 댐퍼를 포함하는 다점 지지 기구이며,상기 상측 지지 기구와 상기 하측 지지 기구 중 상기 다점 지지 기구인 쪽의 4개의 브라켓 각각에 하나의 스트레인 게이지를 구비하는 로드 셀이 하나씩 설치되는 드럼식 세탁기.
- 제4항에 있어서,상기 상측 지지 기구와 상기 하측 지지 기구 중 적어도 하나는 3개 이상의 상기 행잉 스프링 또는 3개 이상의 상기 댐퍼를 구비하는 다점 지지 기구이며,상기 상측 지지 기구와 상기 하측 지지 기구 중 상기 다점 지지 기구인 쪽의 3개 이상의 브라켓은 전후 방향으로 이격되게 위치하는 전방측 브라켓과 후방측 브라켓을 포함하며,상기 전방측 브라켓과 상기 후방측 브라켓 각각에 상기 로드 셀이 하나씩 설치되는 드럼식 세탁기.
- 제1항 내지 제9항 중 어느 한 항에 있어서,상기 터브의 수위를 계측하는 수위 센서(9);를 더 구비하고,상기 프로세서는 상기 하중 검출기 및 상기 수위 센서의 검출 결과에 기초하여 상기 드럼에 수용되는 세탁물의 중량을 계측하는 옷 양 계측 처리와 그 세탁물의 옷감을 추정하는 옷감 추정 처리를 실행하는 드럼식 세탁기.
- 제1항에 있어서,상기 하중 검출기는 다수의 스트레인 게이지를 구비하며,상기 다수의 스트레인 게이지는 상기 상측 지지 기구에 작용하는 하중을 검출하는 4개 이상의 스트레인 게이지와, 상기 하측 지지 기구에 작용하는 하중을 검출하는 4개 이상의 스트레인 게이지를 포함하는 드럼식 세탁기.
- 제11항에 있어서,상기 하중 검출기는상기 터브의 전후 방향으로 중앙부이자 좌우 방향의 양측을 각각 상기 하우징에 매다는 2개의 상기 상측 지지 기구;상기 터브의 전측이자 좌우 방향의 양측 및 상기 터브의 후측이자 좌우 방향의 양측을 각각 상기 하우징에 대하여 지지하는 4개의 상기 하측 지지 기구;를 포함하며,상기 하중 검출기는,2개의 상기 상측 지지 기구 각각에 설치되며, 각각 2개의 제1 스트레인 게이지(51b)를 갖는 2개의 제1로드 셀(51);4개의 상기 하측 지지 기구 각각에 설치되며, 각각 1개의 제2 스트레인 게이지(52b)를 갖는 4개의 제2로드 셀(52);을 포함하는 드럼식 세탁기.
- 제12항에 있어서,상기 2개의 제1로드 셀 각각은 상기 행잉 스프링에 작용하는 하중에 의하여 휘어지는 제1 기왜체(51a)를 구비하며,상기 2개의 제1로드 셀 각각의 상기 2개의 스트레인 게이지는 상기 제1 기왜체의 수축측과 신장측의 변형을 계측할 수 있도록 상기 제1 개왜체의 양면에 배치되며,상기 4개의 제2로드 셀 각각은 상기 댐퍼에 작용하는 하중에 의하여 휘어지는 제2 기왜체(52a)를 구비하며,상기 4개의 제2로드 셀 각각의 상기 1개의 스트레인 게이지는 상기 제2 기왜체의 수축측과 신장측 중 어느 한 쪽의 변형을 계측할 수 있도록 상기 제2 기왜체의 일면에 배치되는 드럼식 세탁기.
- 제12항 또는 제13항에 있어서,상기 하중 검출기는,상기 4개의 제1 스트레인 게이지를 포함하는 제1 휘트스톤 브릿지 회로(61);상기 4개의 제2 스트레인 게이지를 포함하는 제2 휘트스톤 브릿지 회로(62);를 구비하며,상기 프로세서는 상기 제1 및 제2 휘트스톤 브릿지 회로로부터 출력되는 제1 및 제2 신호를 합산하여 상기 터브의 하중을 취득하는 드럼식 세탁기.
- 제14항에 있어서,상기 프로세서는 상기 제1 및 제2 신호 중 적어도 하나를 실수배하는 보정 처리를 수행하는 드럼식 세탁기.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23916411.4A EP4596777A4 (en) | 2023-01-12 | 2023-12-03 | DRUM WASHING MACHINE |
| US19/170,427 US20250230596A1 (en) | 2023-01-12 | 2025-04-04 | Drum-type washing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| JP2023-003392 | 2023-01-12 | ||
| JP2023003392A JP2024099444A (ja) | 2023-01-12 | 2023-01-12 | ドラム式洗濯機 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19/170,427 Continuation US20250230596A1 (en) | 2023-01-12 | 2025-04-04 | Drum-type washing machine |
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| WO2024150928A1 true WO2024150928A1 (ko) | 2024-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2023/019740 Ceased WO2024150928A1 (ko) | 2023-01-12 | 2023-12-03 | 드럼식 세탁기 |
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| Country | Link |
|---|---|
| US (1) | US20250230596A1 (ko) |
| EP (1) | EP4596777A4 (ko) |
| JP (1) | JP2024099444A (ko) |
| WO (1) | WO2024150928A1 (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024207925A1 (de) * | 2024-08-21 | 2026-02-26 | BSH Hausgeräte GmbH | Haushaltsgerät zur Pflege von Wäschestücken |
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| KR950025163A (ko) * | 1994-02-15 | 1995-09-15 | 김광호 | 세탁기 및 세탁방법 |
| JPH1080594A (ja) | 1996-09-09 | 1998-03-31 | Sharp Corp | 全自動洗濯機 |
| KR20120028746A (ko) * | 2010-09-15 | 2012-03-23 | 엘지전자 주식회사 | 세탁기의 제어방법 |
| KR20150001575A (ko) * | 2013-06-27 | 2015-01-06 | 삼성전자주식회사 | 세탁기 |
| EP3348694A1 (en) * | 2017-01-17 | 2018-07-18 | Electrolux Appliances Aktiebolag | A method to control a laundry apparatus |
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| FR2779450B1 (fr) * | 1998-06-05 | 2001-02-09 | Ciapem Sa Cie Ind D App Menage | Machine a laver et/ou secher le linge pourvu d'un dispositif de pesee du linge |
| CN1888224A (zh) * | 2005-06-30 | 2007-01-03 | 博西华电器(江苏)有限公司 | 用进水量测衣物重量的方法及使用该方法的洗衣机 |
| KR101331951B1 (ko) * | 2010-03-12 | 2013-11-22 | 엘지전자 주식회사 | 드럼세탁기 및 드럼세탁기의 제어방법 |
| US20150000350A1 (en) * | 2013-06-27 | 2015-01-01 | Samsung Electronics Co., Ltd. | Washing machine |
| WO2019204948A1 (en) * | 2018-04-27 | 2019-10-31 | V-Zug Ag | Laundry treatment appliance with weight sensor |
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- 2023-01-12 JP JP2023003392A patent/JP2024099444A/ja active Pending
- 2023-12-03 WO PCT/KR2023/019740 patent/WO2024150928A1/ko not_active Ceased
- 2023-12-03 EP EP23916411.4A patent/EP4596777A4/en active Pending
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2025
- 2025-04-04 US US19/170,427 patent/US20250230596A1/en active Pending
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| KR950025163A (ko) * | 1994-02-15 | 1995-09-15 | 김광호 | 세탁기 및 세탁방법 |
| JPH1080594A (ja) | 1996-09-09 | 1998-03-31 | Sharp Corp | 全自動洗濯機 |
| KR20120028746A (ko) * | 2010-09-15 | 2012-03-23 | 엘지전자 주식회사 | 세탁기의 제어방법 |
| KR20150001575A (ko) * | 2013-06-27 | 2015-01-06 | 삼성전자주식회사 | 세탁기 |
| EP3348694A1 (en) * | 2017-01-17 | 2018-07-18 | Electrolux Appliances Aktiebolag | A method to control a laundry apparatus |
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| DE102024207925A1 (de) * | 2024-08-21 | 2026-02-26 | BSH Hausgeräte GmbH | Haushaltsgerät zur Pflege von Wäschestücken |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024099444A (ja) | 2024-07-25 |
| EP4596777A4 (en) | 2026-02-11 |
| US20250230596A1 (en) | 2025-07-17 |
| EP4596777A1 (en) | 2025-08-06 |
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