Washing machine

Abstract

A washing machine according to an embodiment comprises: a housing; a tub provided inside the housing; a drum disposed inside the tub and provided to accommodate laundry; and a detergent supply device configured to supply detergent to the drum. The detergent supply device includes: a cylinder that forms a compression space; and a piston that can move to compress or expand the compression space, the piston including a piston body and a seal cap that is provided to be pressed against the inner surface of the cylinder and is coupled so as to be in tight contact with the piston body.

Description

washing machine

[0001] The present disclosure relates to a washing machine including an automatic detergent dispensing device.

[0002] In general, a washing machine is a device that uses the driving force of a motor to mix laundry, washing water, and detergent inside the washing room together, thereby washing through friction between them.

[0003] The detergent supply unit ensures that detergent is evenly mixed with the water supplied to the washing machine's tub during the process. Liquid detergent can be supplied directly into the tub.

[0004] A detergent supply device may include a detergent container capable of containing detergent and a detergent pump for pumping the detergent contained in the detergent container. The detergent contained in the detergent container is drawn into the detergent pump and then discharged outward from the detergent pump, where it can be transported to the laundry room along with the wash water.

[0005] One aspect of the present disclosure may provide a washing machine capable of preventing breakdown of a detergent supply device.

[0006] One aspect of the present disclosure can provide a washing machine in which the detergent supply device is easy to assemble.

[0007] According to one embodiment, a washing machine includes a housing, a tub provided inside the housing, a drum provided inside the tub and configured to receive laundry, and a detergent supply device configured to supply detergent to the drum, wherein the detergent supply device includes a cylinder forming a compression space, and a piston movably provided to compress or expand the compression space, the piston including a piston body and a seal cap provided to be in close contact with an inner surface of the cylinder and coupled in close contact with the piston body.

[0008] According to one embodiment, a washing machine includes a tub, a drum disposed inside the tub and configured to receive laundry, and a detergent supply device configured to supply detergent to the drum, wherein the detergent supply device includes a cylinder forming a compression space, a piston movably provided to compress or expand the compression space, and a drive motor that moves the piston to compress or expand the compression space, wherein the piston includes a piston body connected to the drive motor, and a seal cap that is injection-formed while the piston body is inserted so as to be in close contact with the piston body.

[0009] FIG. 1 is a drawing illustrating a washing machine according to one embodiment of the present disclosure.

[0010] Fig. 2 is a cross-sectional view showing a cross-section of the washing machine of Fig. 1.

[0011] Figure 3 is an exploded view showing the detergent supply device of Figure 2 in disassembly.

[0012] Fig. 4 is a perspective view of the detergent pump of the detergent supply device of Fig. 3.

[0013] Fig. 5 is an exploded view showing a part of the detergent pump of Fig. 4 from the rear.

[0014] Fig. 6 is a cross-sectional view of the detergent pump of Fig. 4 showing the state before the piston compresses the compression space.

[0015] Fig. 7 is a cross-sectional view showing the state after the piston compresses the compression space in the cross-section of the detergent pump of Fig. 4.

[0016] Fig. 8 is a cross-sectional view showing the detergent pump of Fig. 4 cut in a different direction.

[0017] Fig. 9 is a cross-sectional perspective view showing the detergent pump of Fig. 4 cut in another direction.

[0018] Figure 10 is a cross-sectional perspective view showing the detergent introduced into the inside of the detergent pump of Figure 9 flowing out through the detergent discharge pipe.

[0019] FIG. 11 is a cross-sectional view showing a cut section of a detergent supply device according to one embodiment of the present disclosure.

[0020] FIG. 12 is a cross-sectional view showing a cross-section of a piston according to one embodiment of the present disclosure.

[0021] FIG. 13 is a cross-sectional view showing a cross-section of a piston according to one embodiment of the present disclosure.

[0022] FIG. 14 is a cross-sectional view showing a cross-section of a piston according to one embodiment of the present disclosure.

[0023] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to include various modifications, equivalents, or substitutes of the embodiments.

[0024] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0025] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0026] In this document, each of the phrases "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 "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0027] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0028] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0029] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0030] The terms "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0031] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0032] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0033] Washing machines according to various embodiments can perform washing, rinsing, spin-drying, and drying processes. A washing machine is an example of a clothing treatment device, and the term "clothing treatment device" encompasses devices that wash clothing (laundry items, drying items), devices that dry clothing, and devices that can perform both washing and drying of clothing.

[0034] Washing machines according to various embodiments may include top-loading washing machines in which the laundry inlet for loading or removing laundry is provided facing upward, or front-loading washing machines in which the laundry inlet is provided facing forward. Washing machines according to various embodiments may include washing machines of other loading methods other than top-loading washing machines and front-loading washing machines.

[0035] In the case of a top-loading washing machine, laundry can be washed using a water current generated by a rotating body such as a pulsator. In the case of a front-loading washing machine, laundry can be washed by rotating the drum to repeatedly raise and lower the laundry. The front-loading washing machine may include a washing machine with a dryer that can dry the laundry contained inside the drum. The washing machine with a dryer may include a hot air supply device for supplying high-temperature air into the drum and a condensing device for removing moisture from the air discharged from the drum. For example, the washing machine with a dryer may include a heat pump device. The washing machine according to various embodiments may include a washing machine with a washing method other than the washing method described above.

[0036] Washing machines according to various embodiments 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.

[0037] A washing machine may include a door for opening and closing the laundry compartment. The door may be rotatably mounted to the housing by a hinge. At least a portion of the door may be transparent or translucent to allow the interior of the housing to be viewed.

[0038] A washing machine may include a tub provided within a housing to store water. The tub may be provided in a generally cylindrical shape with a tub opening formed on one side, and may be positioned within the housing such that the tub opening corresponds to a laundry inlet.

[0039] The tub may be connected to the housing by a damper. The damper can absorb vibrations generated when the drum rotates, thereby reducing the vibrations transmitted to the housing.

[0040] A washing machine may include a drum configured to accommodate laundry.

[0041] The drum may be positioned within the tub such that the drum opening provided on one side corresponds to the laundry inlet and the tub opening. Laundry may be sequentially passed through the laundry inlet, the tub opening, and the drum opening to be accommodated within the drum or taken out from the drum.

[0042] The drum rotates within the tub and can perform each of the washing, rinsing, and / or dehydration operations. The cylindrical wall of the drum is formed with a number of perforations, allowing water stored in the tub to flow into or out of the drum.

[0043] A washing machine may include a drive device configured to rotate a drum. The drive device may include a drive motor and a rotating shaft for transmitting driving force generated by the drive motor to the drum. The rotating shaft may be connected to the drum by penetrating the tub.

[0044] The driving device can rotate the drum forward or backward to perform each operation according to the washing, rinsing, and / or dehydration, or drying cycle.

[0045] A washing machine may include a water supply device configured to supply water to a tub. The water supply device may include a water supply pipe and a water supply valve provided on the water supply pipe. The water supply pipe may be connected to an external water source. The water supply pipe may extend from the external water source to a detergent supply device and / or the tub. Water may be supplied to the tub via the detergent supply device. Water may be supplied to the tub without passing through the detergent supply device.

[0046] The water supply valve can open or close the water supply pipe in response to an electrical signal from the control unit. The water supply valve can allow or block the supply of water 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.

[0047] A washing machine may include a detergent supply device configured to supply detergent to a tub. The detergent supply device may include a manual detergent supply device that requires a user to add detergent for each wash cycle, and an automatic detergent supply device that stores a large amount of detergent and automatically supplies a predetermined amount of detergent during a wash cycle. The detergent supply device may include a detergent compartment for storing detergent. The detergent supply device may be configured to supply detergent into the tub during a water supply process. Water supplied through a water supply pipe may be mixed with detergent via the detergent supply device. The water mixed with detergent may be supplied into the tub. Detergent is used as a comprehensive term for pre-wash detergent, main wash detergent, fabric softener, bleach, etc., and the detergent compartment may be divided into a pre-wash detergent storage area, a main wash detergent storage area, a fabric softener storage area, and a bleach storage area.

[0048] A washing machine may include a drainage device configured to discharge water contained in a tub to the outside. The drainage device may include a drain pipe extending from the bottom of the tub to the outside of the housing, a drain valve provided in the drain pipe to open and close the drain pipe, and a pump provided on the drain pipe. The pump may pump water in the drain pipe to the outside of the housing.

[0049] The washing machine may include a control panel positioned on one side of the housing. The control panel may provide a user interface for a user to interact with the washing machine. The user interface may include at least one input interface and at least one output interface.

[0050] At least one input interface can convert sensory information received from a user into an electrical signal.

[0051] At least one input interface may include a power button, an operation button, a course selection dial (or a 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.

[0052] At least one output interface can visually or audibly convey information related to the operation of the washing machine to the user.

[0053] For example, at least one output interface may transmit information related to the washing cycle and operating time of the washing machine, as well as washing / rinsing / spin settings to the user. Information related to the operation of the washing machine may be output via 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.

[0054] The washing machine may include a communication module for communicating with external devices via wires and / or wirelessly.

[0055] The communication module may include at least one of a short-range communication module or a long-range communication module.

[0056] The communication module can transmit data to or receive data from external devices (e.g., a server, a user device, and / or a home appliance). For example, the communication module can establish communication with a server, a user device, and / or a home appliance, and transmit and receive various data.

[0057] To this end, the communication module may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between external devices, and the performance of communication through the established communication channel. According to one embodiment, the communication module may include 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). Any of these communication modules may communicate with the external device via 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 long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips).

[0058] The short-range wireless communication module may include, but is not limited to, a Bluetooth communication module, a BLE (Bluetooth Low Energy) communication module, a near field communication module, a WLAN (Wi-Fi) communication module, a Zigbee communication module, an infrared (IrDA, infrared Data Association) communication module, a WFD (Wi-Fi Direct) communication module, an UWB (ultrawideband) communication module, an Ant+ communication module, a microwave (uWave) communication module, etc.

[0059] 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 with at least one of a base station, an external terminal, and a server on a mobile communication network.

[0060] In one embodiment, the communication module can communicate with external devices such as a server, a user device, and other home appliances through a peripheral access point (AP). The access point (AP) can connect a local area network (LAN) to which the washing machine or the user device is connected to a wide area network (WAN) to which the server is connected. The washing machine or the user device can be connected to the server through the wide area network (WAN). The control unit can control various components of the washing machine, such as a drive motor and a water inlet valve. The control unit can control various components of the washing machine to perform at least one cycle, including water supply, washing, rinsing, and / or spin-drying, according to a user input. For example, the control unit can control the drive motor to adjust the rotation speed of the drum, or control the water inlet valve of the water supply device to supply water to the tub.

[0061] The control unit may include hardware such as a CPU or memory, and software such as a control program. For example, the control unit may include an algorithm for controlling the operation of components within the washing machine, at least one memory storing program-type data, and at least one processor performing the aforementioned operation using data stored in the at least one memory. The memory and the processor may each be implemented as separate chips. The processor may include one or more processor chips or one or more processing cores. The memory may include one or more memory chips or one or more memory blocks. Additionally, the memory and the processor may be implemented as a single chip.

[0062] FIG. 1 is a drawing illustrating a washing machine according to one embodiment of the present disclosure. FIG. 2 is a cross-sectional view illustrating a cross-section of the washing machine of FIG. 1.

[0063] Referring to FIGS. 1 and 2, a washing machine (1) according to one embodiment of the present disclosure may include a main body (10) that accommodates various components therein. The main body (10) may form the exterior of the washing machine (1). A laundry inlet (11) may be formed on one side of the main body (10). The main body (10) may be formed in a box shape with the laundry inlet (11) formed approximately on one side. The laundry inlet (11) may be formed on the front side of the main body (10).

[0064] The main body (10) may include a control panel (15). The control panel (15) may include an input device (15a) configured to obtain user input. The control panel (15) may include a display (15b) configured to output operation information of the washing machine (1). That is, the control panel (15) may provide a user interface (UI) (15) for interaction between the user and the washing machine.

[0065] For example, the control panel (15) may be provided on the front of the main body (10). For example, the control panel (15) may be provided on the upper part of the main body (10).

[0066] The main body (10) may include a detergent box panel (16). The detergent box panel (16) may be coupled to a detergent box (150) to be described later. The detergent box panel (16) may be provided so that a user can pull out the detergent box (150) from the main body (10) or insert it into the main body (10) by gripping the detergent box panel (16).

[0067] For example, the detergent box panel (16) may be provided at the front of the main body (10) and may be coupled to the front of the detergent box (150). For example, the detergent box panel (16) may be provided at the upper part of the main body (10).

[0068] A washing machine (1) may include a door (41) configured to open and close a laundry inlet (11). The door (41) may be rotatably coupled to a main body (10) to open or close the laundry inlet (11). The door (41) may be rotatably coupled to the main body (10) by a hinge (42). The door (41) may be coupled to a front portion of the main body (10).

[0069] The washing machine (1) may include a tub (20) arranged inside the main body (10). The tub (20) may be provided to store mixed water containing washing water and detergent.

[0070] The tub (20) may have a tub opening (21) formed on one side. The tub opening (21) may be arranged to correspond to the laundry inlet (11). For example, the tub (20) may be formed in a cylindrical shape with the tub opening (21) formed on approximately one side.

[0071] The tub (20) can be connected to a damper (29). The tub (20) can be connected to the main body (10) by the damper (29). The tub (20) can be supported by the damper (29). The damper (29) can absorb vibrations generated when the drum (30) rotates and attenuate vibrations transmitted to the main body (10).

[0072] A washing machine (1) may include a drum (30) placed inside a tub (20). The drum (30) may be provided to accommodate laundry therein. The drum (30) may be provided to be rotatable within the tub (20) with respect to the tub (20). The drum (30) may perform each operation according to a cycle such as washing, rinsing, and spin-drying while rotating within the tub (20).

[0073] The drum (30) may have a drum opening (31) formed on one side. The drum opening (31) may be arranged to correspond to the laundry inlet (11) and the tub opening (21). Laundry may be introduced into the drum (30) by sequentially passing through the laundry inlet (11), the tub opening (21), and the drum opening (31). Conversely, laundry may be taken out of the drum (30) by sequentially passing through the drum opening (31), the tub opening (21), and the laundry inlet (11).

[0074] The drum (30) may include a plurality of holes (34) formed so that water stored in the tub (20) can flow into the drum (30) or water inside the drum (30) can be discharged outside the drum (30).

[0075] At least one lifter (35) may be installed on the inner surface of the drum (30) so that laundry can rise and fall when the drum (30) rotates.

[0076] The washing machine (1) may include a driving device (60) configured to rotate the drum (30). The driving device (60) may include a driving motor that generates power to rotate the drum (30) and a rotating shaft that transmits the power generated by the driving motor to the drum (30). The rotating shaft may pass through the tub (20) and be connected to the drum (30). The driving device (60) may perform each operation according to the cycle, such as washing, rinsing, and spin-drying, by rotating the drum (30) forward or backward.

[0077] The washing machine (1) may include a water supply device (50) provided to supply washing water to the tub (20). The water supply device (50) may include a water supply pipe (51) connected to an external water source, and a water supply valve (52) provided to open and close the water supply pipe (51). The water supply pipe (51) may extend from the external water source to a detergent supply device (100) described below, and washing water may be supplied to the tub (20) via the detergent supply device (100). Alternatively, the water supply pipe (51) may extend from the external water source to the tub (20), and washing water may be supplied to the tub (20) without passing through the detergent supply device (100).

[0078] For example, the water supply pipe (51) can be placed at the upper part of the main body (10).

[0079] A washing machine (1) may include a detergent supply device (100). The detergent supply device (100) may be configured to supply detergent to a tub (20). The detergent supply device (100) may be configured to supply a mixture of detergent and wash water to the tub (20).

[0080] The detergent supply device (100) may include a detergent container (150, see FIG. 3) for storing detergent. The detergent supply device (100) may be configured to supply detergent contained in the detergent container (150) into the tub (20) during the water supply process. Water supplied through the water supply pipe (51) may pass through the detergent supply device (100) and be mixed with detergent. The water mixed with detergent may be supplied into the tub (20).

[0081] The detergent supply device (100) can be connected to the tub (20) through a connecting pipe (53). Water mixed with detergent in the detergent supply device (100) can be supplied into the interior of the tub (20) through the connecting pipe (53).

[0082] For example, the detergent supply device (100) may be placed on the upper part of the main body (10). For example, the detergent supply device (100) may be placed on the upper part of the tub (20).

[0083] The washing machine (1) may include a drainage device (54) configured to discharge water inside the tub (20) to the outside. The drainage device (54) may include a drainage pipe (55) extending from the lower portion of the tub (20) to the outside of the main body (10), a drainage valve (56) configured to open and close the drainage pipe (55), and a drainage pump (57) provided on the drainage pipe (55).

[0084] The configurations of the washing machine (1) described above with reference to FIGS. 1 and 2 are merely examples of configurations that may be included in the washing machine (1) according to one embodiment of the present disclosure, and the washing machine (1) may include various configurations for performing functions such as washing laundry.

[0085] In the above, a front-loading type washing machine (1) has been described as an example with reference to FIGS. 1 and 2, but the washing machine according to the idea of ​​the present disclosure is not limited thereto and can be applied to, for example, a top-loading type washing machine.

[0086] Figure 3 is an exploded view showing the detergent supply device of Figure 2 in disassembly.

[0087] As illustrated in FIG. 3, the detergent supply device (100) may include a cover (110). The cover (110) may form the exterior of the detergent supply device (100) together with the housing (140). The cover (110) may be coupled to the upper portion of the water supply plate (120) to seal the water supply plate (120). In other words, the cover (110) may be coupled to the water supply plate (120) to form a path through which the washing water supplied from the water supply device (14) moves.

[0088] The cover (110) may include a washing water inlet (111) connected to a water supply device (14). Washing water may flow into the interior of the detergent supply device (100) through the washing water inlet (111).

[0089] The detergent supply device (100) may include a water supply plate (120) coupled to the cover (110) so as to be positioned between the cover (110) and the housing (140). The water supply plate (120) may include a guide partition (121) that divides a path through which washing water can flow. The water supply plate (120) may, together with the cover (110), form a path through which washing water supplied from the water supply device (14) moves.

[0090] The water supply plate (120) may include a water movement hole (122) provided so that the washing water supplied from the water supply device (14) to the space between the cover (110) and the water supply plate (120) can be discharged to the water supply chamber (211). The water movement hole (122) may be formed by penetrating the water supply plate (120). The water movement hole (122) may be formed in an area of ​​the water supply plate (120) corresponding to the water supply chamber (211). In other words, the water movement hole (122) may be formed in an area of ​​the water supply plate (120) facing the water supply chamber (211).

[0091] The water supply plate (120) may include a through hole (123) through which some of the washing water supplied from the water supply device (14) may pass in order to prevent the detergent discharged to the mixing chamber (141, FIG. 11) by the detergent discharge unit (540, FIG. 4) of the detergent pump (400) from remaining in the mixing chamber (141). The through hole (123) may be located upstream of the washing water movement hole (122) in the direction in which the washing water supplied from the water supply device (14) moves. In other words, the through hole (123) may be formed in the water supply plate (120) adjacent to the washing water inlet (111). Some of the washing water supplied from the water supply device (14) may be discharged to the water supply chamber (211) through the washing water movement hole (122), and the remaining part may be discharged to the mixing chamber (141) through the through hole (123).

[0092] The housing (140) may include an air portion (143) that allows air to pass through one side to control the pressure inside the housing (140).

[0093] The detergent supply device (100) may include a detergent container (200) including a detergent receiving space (201) in which detergent can be received.

[0094] The detergent container (200) can be movably mounted on the housing (140). The detergent container (200) can accommodate a liquid detergent. The liquid detergent can include a rinse, fabric softener, etc.

[0095] A detergent container cover (130) may be provided on the upper side of the detergent container (200) to cover the detergent container (200). The detergent container cover (130) may be formed to correspond to the shape of the upper side of the detergent container (200).

[0096] A detergent container cap (131) may be provided at the front of the detergent container cover (130) so that detergent can be injected into the detergent receiving space (201). The detergent container cap (131) may be detachably connected to the detergent container cover (130).

[0097] The detergent supply device (100) may further include a water supply chamber (211) formed in the detergent container (200) to allow washing water passing through the washing water movement hole (122) to flow in. The water supply chamber (211) may be defined by the water supply chamber frame (210) of the detergent container (200). Washing water passing through the washing water movement hole (122) may flow directly into the water supply chamber (211). Washing water supplied between the cover (110) and the water supply plate (120) may easily pass through the washing water movement hole (122) by gravity and flow into the water supply chamber (211).

[0098] In some cases, powdered detergent may be introduced into the water supply chamber (211). When powdered detergent is introduced into the water supply chamber (211), the powdered detergent may be introduced into the mixing chamber (141, see FIG. 9) together with the washing water introduced through the washing water movement hole (122). A communication hole (not shown) may be formed at the lower side of the water supply chamber (211). The water supply chamber (211) and the mixing chamber (141) may be provided to be in communication with each other.

[0099] The detergent supply device (100) may include a detergent pump (400) that is arranged to suck detergent from a detergent container (200) and discharge it into a mixing chamber (141).

[0100] Below, the detergent pump (400) will be described in detail.

[0101] Fig. 4 is a perspective view of the detergent pump of the detergent supply device of Fig. 3. Fig. 5 is an exploded view showing a portion of the detergent pump of Fig. 4 from the rear, disassembled. Fig. 6 is a cross-sectional view of the detergent pump of Fig. 4 showing a state before the piston compresses the compression space. Fig. 7 is a cross-sectional view of the detergent pump of Fig. 4 showing a state after the piston compresses the compression space.

[0102] Referring to FIG. 4, the detergent pump (400) may include a case (500, 600) forming an exterior.

[0103] The case (500, 600) may include a front case (500) forming a front appearance and a rear case (600) coupled to the rear of the front case (500). For convenience of manufacturing, the rear case (600) may include a middle case (610) coupled to the front case (500) at the rear of the front case (500) and a case cover (640) coupled to the middle case (610) at the rear of the middle case (610).

[0104] The front case (500), middle case (610), and case cover (640) included in the cases (500, 600) may be symmetrical on the left and right with the detergent pump (400) as the center. In other words, since a pair of detergent container caps (131, see FIG. 3) for injecting detergent into the detergent container (200) may be formed on the left and right, cases (500, 600) having corresponding configurations may be formed symmetrically on the left and right.

[0105] Furthermore, all configurations described below can be formed symmetrically on the left and right based on the central portion of the detergent pump (400).

[0106] The front case (500) may include a front case body (510). The front case (500) may include a detergent suction unit (520) that extends from the front case body (510) in a direction in which the detergent pump (400) is coupled to the detergent container (200) and forms a suction space (521) on the inside. In other words, the detergent suction unit (520) may extend forward, and a suction space (521) may be formed on the inside of the detergent suction unit (520).

[0107] The front case (500) may include a detergent discharge portion (540) extending forward from the front case body (510) and forming a discharge space (541) on the inside. In other words, the detergent discharge portion (540) may extend forward, and a discharge space (541) may be formed on the inside of the detergent discharge portion (540).

[0108] A hole sealing member (550) may be provided in front of the detergent suction unit (520) and in front of the sensing member case (531). A plurality of detergent container holes (220) into which the detergent suction unit (520) and the sensing member case (531) can be inserted may be provided in the rear of the detergent container (200). A hole sealing member (550) may be provided to prevent detergent from leaking between the plurality of detergent container holes (220) and the detergent suction unit (520) or the sensing member case (531).

[0109] A check valve module (590) may be formed adjacent to the detergent discharge portion (540).

[0110] A check valve module (590) may be provided to open and close the path through which the detergent moves. The check valve module (590) may include a check valve body (593) provided to open and close the path through which the detergent moves, and an elastic member (596) that elastically biases the check valve body (593) to block the path through which the detergent moves.

[0111] The check valve module (590) on the detergent suction side (520) may be referred to as a first check valve module (591). The check valve module (590) on the detergent discharge side (540) may be referred to as a second check valve module (592). In other words, the check valve module (590) may include a first check valve module (591) configured to open and close a detergent discharge path (900) by a pumping part (630) on the side where detergent flows inward, and a second check valve module (592) configured to open and close a detergent discharge path (900) by a pumping part (630) on the side where detergent flows outward.

[0112] Referring to FIG. 5, the detergent pump (400) may include a drive motor (410). The drive motor (410) may be connected to a piston (632) via a cam gear assembly (420).

[0113] The piston (632) may be configured to be movable within the cylinder (631). The piston (632) may be moved to compress or expand the compression space formed by the cylinder (631).

[0114] The drive motor (410) can generate driving force. The drive motor (410) can generate rotational force to rotate the gear of the cam gear assembly (420). The cam of the cam gear assembly (420) can convert the rotational motion of the gear into linear motion. The cam gear assembly (420) can convert the rotational force generated by the drive motor (410) into linear motion of the piston (532).

[0115] The drive motor (410) and cam gear assembly (420) may each be provided as a pair. Similarly, the pumping unit (630) may also be provided as a pair.

[0116] The drive motor (410) may include a first drive motor (411) and a second drive motor (412). The cam gear assembly (420) may include a first cam gear assembly (421) and a second cam gear assembly (422).

[0117] The first drive motor (411) and the first cam gear assembly (421) can be connected to each other. The first cam gear assembly (421) can move the piston (632) in a linear manner using the rotational force generated from the first drive motor (411). The second cam gear assembly (422) can move the piston (632) in a linear manner using the rotational force generated from the second drive motor (412).

[0118] Referring to FIGS. 6 and 7, the movement of the first check valve module (591) according to the operation of the pumping unit (630) will be described.

[0119] The pumping unit (630) provided in the middle case (610) may include a cylinder (631) provided to form a compression space (630a) and a piston (632) that is movably inserted into the cylinder (631) and can discharge detergent contained in the compression space (630a) from the compression space (630a).

[0120] At this time, the shape of the cylinder (631) may be cylindrical. The piston (632) may also have a corresponding shape.

[0121] The cylinder (631) may be formed to extend vertically, and the piston (632) may move vertically in the cylinder (631) to change the volume of the compression space (630a). However, this is merely an example, and the concept of the present disclosure may also be applied to an example in which the cylinder (631) is formed to extend forward and backward, and the piston (632) is formed to extend forward and backward.

[0122] The piston (632) may be formed into a cone-shaped shape with the center forming the apex in the direction in which the piston (632) moves. A corresponding shape may be formed on the lower side of the cylinder (631). Accordingly, when the volume of the compression space (630a) is reduced, the detergent can be smoothly moved.

[0123] When the piston (632) moves upward, the volume of the compression space (630a) formed inside the cylinder (631) increases. Accordingly, negative pressure is generated in the compression space (630a). At this time, if the detergent suction unit (520) is located in the detergent receiving space (201, FIG. 3) and a certain amount of detergent is contained in the detergent receiving space (201), the detergent can be introduced into the detergent pump (400) through the detergent suction port (522).

[0124] At this time, a first check valve module (591) may be provided between the detergent suction unit (520) and the front shared flow path (911) to control the inflow and outflow of detergent. The first check valve module (591) may be provided with a head portion (594) tapered forward so that it can be inserted into the suction space (521) formed in the detergent suction unit (520) and an elastic support portion (595) extending rearward from the rear of the head portion (594). The elastic support portion (595) may have a hollow portion formed in the center thereof that extends forward and backward. This is because the check valve body (593) described later must block the entrance of the suction space (521) in order to prevent detergent from flowing into the suction space (521), and in this process, deformation may occur in the check valve body (593), and the hollow portion may be formed to facilitate the deformation of the check valve body (593).

[0125] In other words, the first check valve module (591) may include a check valve body (593) that includes a head portion (594) that can open and close the suction space (521) and an elastic support portion (595) that extends from one end of the head portion (594) and is formed integrally with the head portion (594) and has a smaller cross-sectional area than one end of the head portion (594).

[0126] The first check valve module (591) may include an elastic member (596) that elastically biases the check valve body (593) toward the suction space (521).

[0127] When the piston (632) moves upward, the check valve body (593) can move toward the compression space (630a) due to the negative pressure generated in the compression space (630a). Accordingly, the check valve body (593) can not block the space between the suction space (521) and the shared flow path (910).

[0128] Detergent introduced into the suction space (521) through the detergent suction port (522) can move to the shared flow path (910) connected to the suction space (521). The detergent moved to the shared flow path (910) can move to the compression space (630a).

[0129] When the piston (632) moves downwards in the cylinder (631), the detergent can move outwardly of the detergent pump (400). When the piston (632) moves downwards in the cylinder (631), the pressure of the detergent contained in the compression space (630a) increases. Since the pressure of the detergent in the compression space (630a) is higher than that outside the detergent pump (400), the detergent can move outwardly of the detergent pump (400).

[0130] At this time, the check valve body (593) provided between the suction space (521) and the shared flow path (910) moves toward the suction space (521) due to the detergent that has escaped from the compression space (630a). Accordingly, the check valve body (593) can prevent the detergent from moving toward the suction space (521).

[0131] Fig. 8 is a cross-sectional view illustrating the detergent pump of Fig. 4 taken in a different direction. Fig. 9 is a cross-sectional perspective view illustrating the detergent pump of Fig. 4 taken in a different direction. Fig. 10 is a cross-sectional perspective view illustrating the detergent introduced into the detergent pump of Fig. 9 flowing out through the detergent outlet pipe.

[0132] Referring to FIG. 8, the detergent can move from the shared flow path (910) toward the connecting flow path (920).

[0133] The connecting passage (920) may extend toward the discharge space (541) formed by the detergent discharge portion (540). The connecting passage (920) may extend with a downward slope toward the center of the housing (140).

[0134] Since a discharge space (541) formed on the inside of a detergent discharge portion (540) extending forward is connected to the end of the connecting urea (920), it can be seen that the detergent discharge portion (540) is provided at the lower center of the housing (140, see FIG. 3).

[0135] The connecting passage (920) can be formed by a connecting bulkhead (570) and a passage sealing member (580). Along the connecting passage (920), the detergent can move to the central lower part inside the housing (140).

[0136] Referring to FIGS. 9 and 10, the discharge of detergent to the outside of the detergent discharge unit (540) can be controlled by the second check valve module (592) installed on the detergent discharge unit (540) side. The components forming the second check valve module (592) are identical to the components forming the first check valve module (591), and therefore, the same member numbers are assigned to them.

[0137] The second check valve body (593) can be elastically biased toward the connection path (920) by the elastic member (596). The connection between the connection path (920) and the discharge space (541) can be blocked by the check valve body (593).

[0138] As the piston (632) moves downward, the detergent flows into the connecting passage (920), thereby allowing the check valve body (593) to move forward. Accordingly, the connecting passage (920) and the discharge space (541) formed inside the detergent discharge portion (540) can be connected. As a result, the detergent can move toward the mixing chamber (141, see FIG. 11).

[0139] FIG. 11 is a cross-sectional view showing a cut section of a detergent supply device according to one embodiment of the present disclosure.

[0140] Referring to Fig. 11, when detergent is accommodated in the detergent receiving space (201), it can move backward and move inside the detergent pump (400). The detergent that has moved inside the detergent pump (400) can move to the mixing chamber (141) through the detergent discharge portion (540) through the above process. Since the washing water flows toward the discharge port (142) in the mixing chamber (141), the detergent that has moved to the mixing chamber (141) can be mixed with the washing water and move toward the discharge port (142). The moved detergent can move inside the tub (20) through the discharge port (142).

[0141] FIG. 12 is a cross-sectional view illustrating a cross-section of a piston according to one embodiment of the present disclosure. FIG. 13 is a cross-sectional view illustrating a cross-section of a piston according to one embodiment of the present disclosure. FIG. 14 is a cross-sectional view illustrating a cross-section of a piston according to one embodiment of the present disclosure.

[0142] Referring to FIG. 12, a piston (632) according to one embodiment of the present disclosure may be fitted to the inner surface of a cylinder (631, see FIG. 6). The piston (632) may be provided to be movable so as to compress or expand a compression space (630a) formed by the cylinder (631).

[0143] The piston (632) may include a piston body (630a). The piston body (630a) may include a connecting body (6331) connected to a driving motor (410, see FIG. 5). The piston body (630a) may include a connecting portion (6332) formed on the connecting body (6331) to which a seal cap (634) is connected.

[0144] The coupling portion (6332) may include a coupling head (6332a) to which the seal cap (634) is coupled. The coupling head (6332a) may be inclined so that its diameter decreases along the direction in which the piston (632) compresses the compression space (630a, see FIG. 6). However, the shape of the coupling head (6332a) is not limited thereto.

[0145] The seal cap (634) may include a sealing portion (6342) having a shape corresponding to that of the coupling head (6332a). The sealing portion (6342) may be fitted so that there is no empty space between it and the coupling head (6332a).

[0146] The seal cap (634) may include a compression member (6341) configured to compress the compression space (630a). The compression member (6341) may also have a shape corresponding to the coupling head (6332a).

[0147] The coupling portion (6332) may include a coupling groove (6332b) formed by being recessed inward toward the center of the coupling head (6332a). The coupling groove (6332b) may be formed by being recessed from the outer surface of the coupling head (6332a) toward the central axis of the piston (632). The coupling groove (6332b) may enhance the bonding strength between the seal cap (634) and the coupling portion (6332).

[0148] The piston (632) may include a seal cap (634) that is provided to fit tightly against the inner surface of the cylinder (631).

[0149] The seal cap (634) may be provided to be in close contact with the piston body (630a). That is, no space may exist between the seal cap (634) and the piston body (630a). The seal cap (634) needs to be provided to be movable while being in close contact with the inner surface of the cylinder (631).

[0150] Since the piston (632) must be able to increase or decrease the pressure of the compression space (630a) by moving in a state of being in close contact with the inner surface of the cylinder (631), the seal cap (634) must be able to maintain a state of being in close contact with the inner surface of the cylinder (631).

[0151] However, the seal cap (634) may expand due to prolonged contact with detergent or the like. The expansion of the seal cap (634) may cause the seal cap (634) to be disengaged from the piston body (630a). In other words, the expansion of the seal cap (634) may cause it to detach from the piston body (630a).

[0152] To prevent this, the seal cap (634) can be injection-molded with the piston body (630a) inserted. That is, the seal cap (634) is formed separately from the piston body (630a) and is not assembled with each other, but the piston body (630a) can be inserted when the seal cap (634) is injected.

[0153] At least a portion of the seal cap (634) may be inserted into the coupling groove (6332b) so as to interfere with the coupling groove (6332b). The seal cap (634) may be hardened after being introduced into the coupling groove (6332b). That is, the seal cap (634) may not be manufactured separately and then coupled to the piston body (630a), but may be manufactured with the piston body (630a) inserted therein.

[0154] The seal cap (634) may include an elastic material to ensure a close fit with the inner surface of the cylinder (631). For example, the seal cap (634) may be formed of TPE. As another example, the seal cap (634) may be formed by mixing resin into the TPE. The degree of expansion of the seal cap (634) may be reduced.

[0155] When manufacturing a piston (632), the process of separately injecting the piston body (630a) and the seal cap (634) and assembling them is omitted, so that manufacturing efficiency can be improved. That is, when manufacturing a piston (632), the piston body (630a) is first injected, and then the seal cap (634) is double-injected, so that the piston body (630a) can be automatically assembled thereto.

[0156] The piston (632) needs to have a joint structure for being joined to the piston body (630a) and the seal cap (634). Detergent, etc. may penetrate into this joint structure, affecting the expansion or detachment of the seal cap (634).

[0157] According to one embodiment of the present disclosure, a piston (632) may not have a gap between the piston body (630a) and the seal cap (634). Detergent or the like may not penetrate between the seal cap (634) and the piston body (630a).

[0158] The structure of the connecting portion (6332) of the piston (632) according to one embodiment of the present disclosure is not limited thereto. While the connecting portion (6332) typically has a complex structure to enhance bonding strength, this may have the disadvantage of making assembly difficult. However, in the piston (632) according to one embodiment of the present disclosure, regardless of which connecting portion (6332) the piston body (630a) has, the seal cap (634) can be in close contact with the piston body (630a).

[0159] Below, a description will be given of embodiments other than the piston (632) of Fig. 12. The same reference numerals are assigned to identical components and detailed descriptions may be omitted, while other components will be described in detail.

[0160] Referring to FIG. 13, a piston (632-1) according to one embodiment of the present disclosure may include a seal cap (634-1) that is provided to be in close contact with a piston body (6331-1).

[0161] The piston body (633-1) may include a connecting body (6331-1) and a connecting portion (6332-1) formed in the connecting body (6331-1).

[0162] The coupling portion (6332-1) may include a coupling head (6332a-1) to which a seal cap (634-1) is coupled. The coupling portion (6332-1) may include a coupling groove (6332b-1) that is recessed from the outer surface of the coupling head (6332a-1) toward the central axis of the piston (632-1).

[0163] The coupling groove (6332b-1) may include a catch groove (6332c-1) formed by bending a portion of the coupling groove (6332b-1). The catch groove (6332c-1) may be formed on the inside of the coupling head (6332a-1).

[0164] The coupling groove (6332b-1) may have a shape that is bent at an approximately right angle. By having the coupling groove (6332b-1) in a bent shape, the seal cap (634-1) can have a stronger bonding strength with the coupling groove (6332b-1). However, if the seal cap (634-1) and the piston body (633-1) are manufactured separately and then assembled, assembly may be difficult.

[0165] According to one embodiment of the present disclosure, the piston (632-1) can be easily coupled to the seal cap (634-1) even if the coupling groove (6332b-1) is bent. In addition, the seal cap (634-1) can be coupled so as to be in close contact with the coupling groove (6332b-1).

[0166] The shape of the coupling groove (6332b-1) disclosed in this city is only an example and can be formed in various other shapes.

[0167] Referring to FIG. 14, a piston (632-2) according to one embodiment of the present disclosure may include a piston body (633-2).

[0168] The piston (632-2) may include a seal cap (634-1) that is provided to be in close contact with the piston body (6331-1).

[0169] The piston body (633-2) may include a connecting body (6331-2) and a connecting portion (6332-2) formed in the connecting body (6331-2).

[0170] The coupling portion (6332-2) may include a coupling head (6332a-2) to which the seal cap (634-2) is coupled. The coupling portion (6332-2) may include a coupling groove (6332b-2) that is recessed from the outer surface of the coupling head (6332a-2) toward the central axis of the piston (632-2).

[0171] A plurality of coupling grooves (6332b-2) may be provided. The plurality of coupling grooves (6332c-2) may be positioned at predetermined intervals. As shown in the drawing, the plurality of engaging grooves (6332c-2) may be provided in two numbers.

[0172] By providing multiple coupling grooves (6332b-2), the seal cap (634-2) can have a stronger coupling strength with the coupling grooves (6332b-2). However, if the seal cap (634-2) and the piston body (633-2) are manufactured separately and then assembled, assembly may be difficult.

[0173] According to one embodiment of the present disclosure, the piston (632-2) can be easily coupled to the seal cap (634-2) even if the coupling groove (6332b-2) is bent. In addition, the seal cap (634-2) can be coupled so as to be in close contact with the coupling groove (6332b-2).

[0174] According to one embodiment, a washing machine includes a tub (20), a drum (30) arranged inside the tub and configured to receive laundry, and a detergent supply device (100) configured to supply detergent to the drum, wherein the detergent supply device includes a cylinder (631) forming a compression space, and a piston (632) that is movably provided to compress or expand the compression space, the piston body (633) being provided to be in close contact with the inner surface of the cylinder and including a seal cap (634) that is coupled to be in close contact with the piston body.

[0175] The detergent supply device may further include a driving motor (410) configured to move the piston, and the piston body may include a connecting body (6331) connected to the driving motor, and a connecting portion (6332) formed on the connecting body to be connected to the seal cap.

[0176] The above-mentioned coupling part includes a coupling head (6332a) for coupling the seal cap, and the seal cap can be coupled in close contact with the coupling head.

[0177] The above-mentioned coupling portion may include a coupling groove (6332b) formed by recessing inward toward the center of the coupling head.

[0178] At least a portion of the seal cap may be inserted into the mating groove so as to interfere with the mating groove.

[0179] The above-mentioned coupling groove may include a plurality of coupling grooves (6332b-2) formed at a predetermined interval.

[0180] The above-mentioned joining groove may include a catch groove (6332c-2) formed by bending a portion of the above-mentioned joining groove.

[0181] The above-mentioned hook-and-loop can be formed on the inside of the above-mentioned joining head.

[0182] The above piston can be formed by injection molding the seal cap while the piston body is inserted.

[0183] The above seal cap can be introduced into the above joining groove and cured.

[0184] The above seal cap may include an elastic material.

[0185] The above-mentioned joining head can be inclined so that its diameter decreases along the direction in which the compression space is compressed.

[0186] The above seal cap may include a sealing portion (6342) having a shape corresponding to the bonding head so as to be in close contact with the bonding head.

[0187] The above seal cap may include a compression member (6341) provided to compress the compression space.

[0188] The above compression member may have an inclined shape so that the diameter decreases along the direction in which the compression space is compressed.

[0189] According to one embodiment, a washing machine includes a tub (20), a drum (30) arranged inside the tub and configured to receive laundry, and a detergent supply device (100) configured to supply detergent to the drum, wherein the detergent supply device includes a cylinder (631) forming a compression space, a piston (632) movably provided to compress or expand the compression space, and a drive motor (410) that moves the piston to compress or expand the compression space, and wherein the piston includes a piston body (633) connected to the drive motor, and a seal cap (634) that is injection-formed while the piston body is inserted so as to be in close contact with the piston body.

[0190] The piston body includes a connecting body (6331) connected to the driving motor and a coupling head (6332a) to which the seal cap is coupled, and the seal cap can be coupled to the coupling head so as to be in close contact with it.

[0191] The above-mentioned joining head may include a joining groove (6332b) formed by recessing inward toward the center of the joining head.

[0192] At least a portion of the seal cap may be inserted into the mating groove so as to interfere with the mating groove.

[0193] The above seal cap may include an elastic material.

[0194] According to one aspect of the present disclosure, a breakdown of a detergent supply device of a washing machine can be prevented.

[0195] According to one aspect of the present disclosure, a detergent supply device for a washing machine can be easily assembled.

[0196] The above illustrates and describes specific embodiments. However, the invention is not limited to the above-described embodiments, and those skilled in the art will readily appreciate that various modifications and implementations can be made without departing from the spirit and scope of the invention as set forth in the claims below.

Claims

1. Tub; A drum arranged inside the tub and configured to accommodate laundry; A detergent supply device configured to supply detergent to the drum; The above detergent supply device, a cylinder forming a compressed space; and A piston that is movably provided to compress or expand the compression space, comprising a piston body and a seal cap that is provided to be in close contact with the inner surface of the cylinder and is coupled to be in close contact with the piston body; A washing machine in which the piston is formed by injection molding the seal cap while the piston body is inserted.

2. In paragraph 1, The above detergent supply device, Further comprising a driving motor configured to move the piston; A washing machine including a piston body, a connecting body connected to the driving motor, and a connecting portion formed on the connecting body to be connected to the seal cap.

3. In paragraph 2, A washing machine in which the above-mentioned joining part includes a joining head for joining the seal cap, and the seal cap is joined so as to be in close contact with the joining head.

4. In paragraph 3, A washing machine including a coupling groove formed by recessing the coupling portion inward toward the center of the coupling head.

5. In paragraph 4, A washing machine wherein at least a portion of the seal cap is inserted into the coupling groove so as to interfere with the coupling groove.

6. In paragraph 5, A washing machine comprising a plurality of coupling grooves formed at predetermined intervals, wherein the above coupling grooves are spaced apart from each other.

7. In paragraph 5, A washing machine wherein the above-mentioned joining groove includes a catch groove formed by bending a portion of the above-mentioned joining groove.

8. In paragraph 7, A washing machine in which the above-mentioned hanging groove is formed on the inside of the above-mentioned joining head.

9. In paragraph 5, The above seal cap is a washing machine that is introduced into the above joining groove and hardened.

10. In paragraph 5, The above seal cap is a washing machine containing an elastic material.

11. In paragraph 3, The above-mentioned combining head is a washing machine inclined so that its diameter decreases along the direction in which the compression space is compressed.

12. In paragraph 11, A washing machine in which the seal cap includes a sealing portion having a shape corresponding to the bonding head so as to be in close contact with the bonding head.

13. In paragraph 12, A washing machine in which the seal cap includes a compression unit configured to compress the compression space.

14. In paragraph 13, A washing machine in which the compression section has an inclined shape so that the diameter decreases along the direction in which the compression space is compressed.

Images