WO2023078092A1 - 一种外置洗涤剂切换投放装置及洗衣机 - Google Patents

一种外置洗涤剂切换投放装置及洗衣机 Download PDF

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Publication number
WO2023078092A1
WO2023078092A1 PCT/CN2022/126377 CN2022126377W WO2023078092A1 WO 2023078092 A1 WO2023078092 A1 WO 2023078092A1 CN 2022126377 W CN2022126377 W CN 2022126377W WO 2023078092 A1 WO2023078092 A1 WO 2023078092A1
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WIPO (PCT)
Prior art keywords
outlet
valve body
liquid
valve
switching
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PCT/CN2022/126377
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English (en)
French (fr)
Inventor
孙冬松
许升
吕艳芬
张涛
马传荣
刘凯
Original Assignee
海尔衣联生态科技(上海)有限公司
海尔智家股份有限公司
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Publication of WO2023078092A1 publication Critical patent/WO2023078092A1/zh

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/022—Devices for adding soap or other washing agents in a liquid state
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Definitions

  • the invention belongs to the field of washing machines, and in particular relates to an external detergent switching device and a washing machine.
  • the washing machine has more and more functions, which greatly facilitates people's various laundry requirements.
  • the automatic detergent injection function does not require users to manually inject detergent, which saves user operations. Therefore, users There is an increasing demand for automatic detergent dosing.
  • the existing automatic feeding washing machines usually put in multiple detergents, such as laundry detergent, softener, disinfectant and the like.
  • a plurality of feeding pumps are used to feed separately.
  • the number of feeding pumps is large, the structure is complex, the space is large, and the cost is high.
  • the sealing performance is not good due to the number of feeding pumps, which affects the user experience.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide an external detergent switching and feeding device, including a switching valve.
  • multiple liquid inlets are arranged on the side of the valve body.
  • the end is provided with a liquid outlet, and a sealing structure is provided between the liquid outlet and the outlet of the valve core, so that the valve core can rotate relative to the valve body, and at the same time, improve the sealing performance of the switch valve when it is put in, preventing When the valve core rotates relative to the valve body, the detergent will leak and the user experience will be improved.
  • Another object of the present invention is to provide a washing machine capable of adding various detergents, with a simple structure and good sealing performance.
  • an external detergent switching and feeding device including a switching valve, and the switching valve includes,
  • a valve body the side of the valve body has a plurality of liquid inlets arranged at intervals along the circumferential direction, and the end of the valve body has a liquid outlet arranged at the center of the end;
  • the valve core is rotatably arranged in the valve body, and the outer peripheral wall of the valve core is in rotational and sealing connection with the inner peripheral wall of the valve body.
  • An outlet is provided on the outer wall of the valve core for connecting with the liquid inlet connected;
  • the liquid outlet of the valve body is in rotational and sealed connection with the outlet of the valve core.
  • a matching rotary sealing structure is provided between the liquid outlet and the outlet.
  • the rotary seal includes a first sealing structure arranged on the outer periphery of the outlet, and the first sealing structure protrudes toward the liquid outlet of the valve body;
  • the first sealing structure is an annular boss.
  • the rotary sealing structure also includes a second sealing structure, which is arranged on the inner side wall of the valve body on the outer periphery of the liquid outlet, and is in rotational contact with the first sealing structure;
  • the second sealing structure is an annular groove.
  • the spool includes,
  • Shaft seat used to install the rotating shaft
  • the support seat is arranged to extend outward from the outer peripheral wall of the shaft seat along the radial direction of the shaft seat;
  • An outer peripheral plate the inner circumference of the outer peripheral plate is connected to the outer circumference of the support seat, and the outer peripheral plate is provided with an inlet communicating with the outlet, for selectively entering one of the plurality of liquid inlets when the valve core rotates.
  • the liquid port is connected or disconnected, and the inlet is connected with the outlet;
  • the outlet is arranged at the center of one axial end of the shaft seat, opposite to the liquid outlet; the first sealing structure is arranged on the shaft seat at the outer periphery of the outlet.
  • the liquid inlet channel includes,
  • the first liquid inlet passage is arranged in the valve core, one end of the first liquid inlet passage communicates with the inlet, and the other end extends radially from the support seat to the shaft seat;
  • the second liquid inlet channel is arranged in the shaft seat, one end of the second liquid inlet channel is connected to the other end of the first liquid inlet channel, and the other end extends to the outlet.
  • valve body has a matching chamfer structure between the inner peripheral wall of the liquid outlet and the opposite edge of the outer peripheral plate.
  • the end of the support seat of the valve core is provided with a positioning protrusion, which is connected between the outer peripheral wall of the first sealing structure and the inner peripheral wall of the outer peripheral plate;
  • the valve body has limit ribs on the inner wall of the liquid outlet, which are arranged at intervals in the circumferential direction; the positioning protrusions can abut against the limit ribs to limit the rotation range of the valve core;
  • the positioning protrusion extends along the radial direction of the shaft seat, and is connected between the outer peripheral wall of the first sealing structure and the inner peripheral wall of the outer peripheral plate; the limiting rib extends along the valve body The radial extension of the end is set.
  • a motor which is arranged at the other end opposite to the liquid outlet of the switching valve, connected with the valve core, and used to control the rotation of the valve core relative to the valve body;
  • it also includes a detergent box, which has a plurality of detergent injection chambers corresponding to the plurality of liquid inlets; the first liquid inlet is communicated with a water inlet pipe for cleaning the injection chambers.
  • a detergent box which has a plurality of detergent injection chambers corresponding to the plurality of liquid inlets; the first liquid inlet is communicated with a water inlet pipe for cleaning the injection chambers.
  • a washing machine comprising an external detergent switching device according to any one of claims 1-9.
  • the present invention has the following beneficial effects compared with the prior art.
  • liquid inlets are arranged on the side of the valve body, and liquid outlets are arranged on the end of the valve body.
  • the agent can be put in through the switching valve, which has a simple structure, takes up little space and is low in cost.
  • the present invention provides a matching rotary sealing structure between the liquid outlet and the outlet, so that the valve core and the valve body can realize plug-in sealing, which increases the sealing performance of the switching valve, and realizes the valve core relative to the valve.
  • a stepping motor is set to control the switching valve to select and dispense detergent at different stages, which can realize continuous control of the dosing device and improve the control accuracy of the detergent dosing device.
  • Fig. 1 is a schematic diagram of the connection between the external detergent dispensing device and the washing machine of the present invention
  • Fig. 2 is the overall structure diagram of the external detergent dispensing device of the present invention.
  • Fig. 3 is a structural diagram of the dosing device in the external detergent dosing device of the present invention.
  • Fig. 4 is a structural diagram of the switching valve in the external detergent dispensing device of the present invention.
  • Fig. 5 is a top view of Fig. 4 of the external detergent dispensing device of the present invention.
  • Fig. 6 is a cross-sectional view of Fig. 5 of the external detergent dispensing device of the present invention.
  • Fig. 7 is an enlarged view of C in Fig. 6 of the external detergent dispensing device of the present invention.
  • Fig. 8 is a schematic diagram of the valve body in the external detergent dispensing device of the present invention.
  • Fig. 9 is a schematic diagram of the valve core in the external detergent dispensing device of the present invention.
  • Fig. 10 is a sectional view of Fig. 5 of the external detergent dispensing device of the present invention.
  • Fig. 11 is a schematic diagram of the switching valve in the external detergent dispensing device of the present invention.
  • Fig. 12 is a schematic diagram of the switching valve in the external detergent dispensing device of the present invention.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.
  • an external detergent switching dosing device includes a switching valve 26 .
  • the switching valve 26 includes a valve body 262 and a valve core 264 .
  • the side of the valve body 262 has a plurality of liquid inlets 261 arranged at intervals along the circumferential direction, and the end of the valve body 262 has a liquid outlet 263 arranged at the center of the end.
  • the valve core 264 is rotatably arranged in the valve body 262, and the outer peripheral wall of the valve core 264 is connected to the inner peripheral wall of the valve body 262 in a rotational and sealed manner, and an outlet 2648 is provided on the outer wall of the valve core 264 , used to communicate with the liquid inlet.
  • the liquid outlet 263 of the valve body 262 is connected to the outlet 2648 of the valve core 264 in a rotational and sealed manner.
  • the present invention rotates and seals the connection between the liquid outlet 263 of the valve body 262 and the outlet 2648 of the valve core 264, while realizing the rotation of the valve core 264 relative to the valve body 262, the switching valve is improved. 26 prevents detergent from leaking when the valve core 264 rotates relative to the valve body 262, thereby increasing user experience.
  • a plurality of liquid inlets 261 are arranged on the side of the valve body 262, and a liquid outlet 263 is arranged at the center of the end of the switching valve 26, so that various detergents can be washed separately through the switching valve 26. Delivery, simple structure, small space occupation and low cost.
  • the external detergent switching and dispensing device 2 is connected to the washing machine through a water inlet pipe 3 and a water outlet pipe 4 .
  • the external detergent switching and dispensing device 2 includes a housing 21, and the housing 21 has a display screen 1 for displaying the state of detergent.
  • Both the water inlet pipe 3 and the water outlet pipe 4 are provided with one-way valves to prevent the liquid from flowing back.
  • It also includes a feeding pump 24, which is connected to the switching valve 26 through a pipeline, and the detergent in the switching valve 26 communicates with the water inlet pipe 3 and the water outlet pipe 4 through the feeding pump 24, and is used for feeding detergent and cleaning the switching valve 26.
  • the present invention is provided with a plurality of liquid inlets 261 on the side of the valve body 262, and a liquid outlet 263 is provided at the end of the valve body 262, and the valve core 264 is rotatably arranged on the In the valve body 262, the inlet 2643 provided on the outer peripheral wall of the valve core 264 can be selectively communicated with one of the plurality of liquid inlets 261 provided on the valve body 262, so that one of the liquid inlets is connected to the liquid outlet. Port 263 is communicated to realize the injection of detergent. Only one inlet 2643 is provided on the spool 264, which reduces the complexity of the structure of the switching valve 26, reduces the cost, and realizes the accurate delivery of detergent types.
  • a matching rotating sealing structure is provided between the liquid outlet 263 and the outlet 2648 .
  • the rotating sealing structure is arranged between the liquid outlet 263 and the outlet 2648.
  • the rotating sealing structure When detergent is put in, the rotating sealing structure is close to the liquid outlet 263, which is convenient for washing the detergent. It smoothly enters the cleaning chamber, reduces the residual amount of detergent in the switching valve 26, and improves the washing effect.
  • the rotary sealing structure includes a first rotary sealing structure and a second rotary sealing structure.
  • the first sealing structure is disposed on the outer periphery of the outlet 2648 , and the first sealing structure protrudes toward the liquid outlet 263 of the valve body 262 .
  • the first sealing structure is an annular boss 2641 .
  • annular boss 2641 By setting the annular boss 2641 on the outer periphery of the outlet 2648 and extending along the direction of the liquid outlet 263 of the valve body 262, it is convenient to cooperate with the liquid outlet 263, and the annular boss 2641 can It is directly connected with the inner wall of the liquid outlet 263 in a rotary and sealed manner to form a plug-in seal, which improves the sealing performance of the switching valve 26 when detergent is injected, improves the washing effect, and increases user experience.
  • the second sealing structure is disposed on the inner wall of the valve body 262 on the outer periphery of the liquid outlet 263 , and is in rotational contact with the first sealing structure.
  • the second sealing structure is an annular groove 2621 .
  • annular groove 2621 By setting the annular groove 2621 on the inner wall of the valve body 262 on the outer periphery of the liquid outlet 263, it can cooperate with the annular boss 2641 provided on the outer periphery of the outlet 2648, and install the annular boss 2641.
  • a plug-in seal is formed, and the annular boss 2641 is inserted into the annular groove 2621 to realize the circumferential rotation of the valve core 264 in the valve body 262, increasing the detergent in the Airtightness during delivery.
  • an outlet 2648 is provided on the outer wall of the valve core 264, and the outlet 2648 communicates with the liquid outlet 263, and the sealing structure is arranged between the outlet 2648 and the outlet. The connection of the liquid outlet 263.
  • an inlet 2643 communicated with the liquid outlet 263 is provided on one end of the valve core 264, and the sealing structure is arranged at the communication place between the outlet 2648 and the liquid outlet 263 to fix the
  • the outlet 2648 communicates with the liquid outlet 263, and at the same time, when the valve core 264 rotates, the outlet 2648 is always connected with the liquid outlet 263, which reduces the number of feeding pumps 24 and has a simple structure.
  • a variety of detergents can be dispensed through a switch valve 26, which improves the practicability of the switch valve 26 and increases user experience.
  • valve core 264 includes a shaft seat 2645 , a support seat 2646 and an outer peripheral plate 2647 .
  • the shaft seat 2645 is used for installing the rotating shaft.
  • the rotatable seal of the rotating shaft is installed in the opposite end of the liquid outlet 263 and connected with the valve core 264 for driving the valve core 264 in the valve body 262 Turn inside.
  • the supporting seat 2646 extends outward from the outer peripheral wall of the shaft seat 2645 along the radial direction of the shaft seat 2645 .
  • the inner circumference of the outer peripheral plate 2647 is connected to the outer circumference of the support seat 2646, and the outer peripheral plate 2647 is provided with an inlet 2643 for selectively connecting with one of the plurality of liquid inlets 261 when the valve core 264 rotates.
  • the liquid inlet is connected or disconnected, and the inlet 2643 is connected with the outlet 2648 .
  • the outlet 2648 is arranged at the center of one axial end of the shaft seat 2645 , opposite to the liquid outlet 263 ; the first sealing structure is arranged on the shaft seat 2645 on the outer periphery of the outlet 2648 .
  • the annular boss 2641 is arranged on the shaft seat 2645 on the outer periphery of the outlet 2648, and is arranged along the axial extension of the shaft seat 2645, and the annular groove 2621 is arranged On the inner wall of the valve body 262 on the outer periphery of the liquid outlet 263 of the valve body 262 , it is arranged annularly along the liquid outlet 263 and extended toward the liquid outlet direction of the liquid outlet 263 .
  • the liquid outlet 263 is equal in diameter to the outlet 2648 , and the annular boss 2641 matches the annular groove 2621 and is larger than inner diameters of the outlet 2648 and the liquid outlet 263 .
  • the annular boss 2641 can be arranged on the inner wall of the valve body 262 on the outer periphery of the liquid outlet 263, extending along the inner wall of the valve body 262 in a direction opposite to the liquid outlet direction, and the annular groove 2621 is set On the shaft seat 2645 on the outer periphery of the outlet 2648 , it extends along the direction opposite to the liquid outlet.
  • the annular boss 2641 and the annular groove 2621 form a plug-in seal.
  • valve core 264 has a liquid inlet passage 2642 communicating with the inlet 2643 and the outlet 2648 .
  • liquid inlet channel 2642 in the valve core 264 By setting the liquid inlet channel 2642 in the valve core 264, communicating with the liquid outlet 263 and the inlet 2643 on the valve core 264, when the valve core 264 is rotating, various detergents can pass through the valve.
  • the liquid inlet channels 2642 in the core 264 correspond to one-to-one injection or water intake to flush the inside of the switching valve 26, which improves the accuracy of feeding different types of detergents or cleaning the switching valve.
  • the liquid inlet channel 2642 communicates with the inlet 2643 to block other liquid inlets, prevent other detergents from leaking during dispensing, and improve the sealing performance of the switching valve 26 .
  • Only one inlet 2643 is provided on the valve core 264, which avoids the complexity and misoperation of multiple inlets, improves the control accuracy of the switching valve 26, and increases user experience.
  • the liquid inlet channel 2642 includes a first liquid inlet channel and a second liquid inlet channel.
  • the first liquid inlet passage is arranged in the valve core 264, one end of the first liquid inlet passage communicates with the inlet 2643, and the other end extends radially from the support seat 2646 to the shaft seat Within 2645.
  • the second liquid inlet channel is arranged in the shaft seat, one end of the second liquid inlet channel is connected to the other end of the first liquid inlet channel, and the other end extends to the outlet 2648 .
  • the annular boss 2641 is arranged on the second passage to connect with the liquid outlet 263, the annular groove 2621 is arranged on the outer periphery of the liquid outlet 263, and the annular boss 2641 cooperates with the annular groove 2621, and the second liquid inlet channel communicates with the liquid outlet 263, so that the second liquid inlet channel will not be rotated by the spool 264, resulting in the second liquid inlet channel Deviating from the liquid outlet 263 prevents inaccurate control, improves the tightness and practicability of the device, and increases user experience.
  • valve body 262 has a matching chamfer structure between the inner peripheral wall of the liquid outlet 263 and the opposite edge of the outer peripheral plate 2647 .
  • the present invention realizes the contact and sealing between the outer peripheral plate 2647 and the inner peripheral wall of the valve body 262 by setting the outer peripheral plate 2647 and setting matching chamfering structures on the valve body 262 and the outer peripheral plate 2647 . Only one inlet 2643 is provided on the outer peripheral plate 2647, which can connect with one of the multiple liquid inlets 261 and block other liquid inlets when feeding.
  • the opposite liquid inlet communicates with the liquid inlet passage 2642 in the valve core 264, and the annular protrusion at the second liquid inlet passage
  • the platform 2641 and the annular groove 2621 at the liquid outlet 263 realize plug-in sealing, and a certain amount of detergent is dispensed from the liquid outlet 263 .
  • One of the plurality of liquid inlets 261 is a water inlet 2611
  • valve core 264 rotates, the inlet 2643 on the outer peripheral plate 2647 rotates to the water inlet 2611, communicates with the water inlet 2611, and the second liquid inlet channel is connected to the liquid outlet.
  • 263 is always connected under the restriction of the annular groove 2621 and the annular boss 2641, and then the water flow flushes the inside of the valve body 262 into the cleaning equipment to realize detergent injection or cleaning.
  • the rotation strength of the switching valve 26 is increased by setting the support seat 2646, and a chamfering structure is set on the joint surface of the valve body 262 and the outer peripheral plate 2647, so that the cooperation between the valve body 262 and the valve core 264 is improved.
  • a chamfering structure is set on the joint surface of the valve body 262 and the outer peripheral plate 2647, so that the cooperation between the valve body 262 and the valve core 264 is improved.
  • it can be guided to the contact surface between the valve core 264 and the valve body 262 through the chamfer structure, so as to realize self-lubricating effect and facilitate the installation of the valve core 264.
  • the end of the support seat 2646 of the valve core 264 is provided with a positioning protrusion 2644 connected between the outer peripheral wall of the first sealing structure and the inner peripheral wall of the outer peripheral plate 2647 .
  • the inner wall of the valve body 262 with the liquid outlet 263 is provided with limiting ribs 2622 arranged at intervals along the circumferential direction.
  • the positioning projection 2644 is arranged along the radial extension of the shaft seat 2645 ; the limiting rib 2622 is arranged along the radial extension of the end of the valve body 262 .
  • the positioning protrusion 2644 can abut against the limiting rib 2622 to limit the rotation range of the valve core 264 .
  • limiting ribs 2622 there are two limiting ribs 2622, and the end of the support seat 2646 of the valve core 264 is provided with a positioning protrusion 2644, which is connected between the outer peripheral plate 2647 and the annular boss 2641.
  • the ribs 2622 can respectively abut against the limiting ribs 2622 for limiting the rotation range of the valve core 264 within a preset range.
  • a motor is also included, which is arranged at the other end of the switching valve 26 opposite to the liquid outlet 263 and connected with the valve core 264 for controlling the rotation of the valve core 264 relative to the valve body 262 .
  • the motor is a stepper motor 23 .
  • the limiting rib 2622 By setting the limiting rib 2622 in the circumferential direction of the end of the liquid outlet 263, it can cooperate with the positioning protrusion 2644 on the end of the support seat 2646, so that the switching valve 26 operates under the control of the stepping motor.
  • the stepper motor When the limiting rib 2622 is in contact with the positioning protrusion 2644, the stepper motor is blocked, and the switching valve 26 is not in the detergent injection state, so that the control accuracy of the switching valve 26 is more accurate and the user experience is improved.
  • the rotating shaft is arranged on the opposite end of the switching valve 26 and the liquid outlet 263, and is connected with the motor.
  • the rotating shaft, the stepping motor 23 and the valve core 264 are coaxially arranged, and the stepping motor 23 drives The rotating shaft drives the valve core 264 to rotate.
  • Described stepper motor 23 is connected with described switching valve 26 by connector.
  • a detergent box 22 which has a plurality of detergent injection chambers in one-to-one correspondence with the plurality of liquid inlets 261; the water inlet 2611 in the plurality of liquid inlets 261 communicates with the water inlet pipe 3, and uses For cleaning the delivery chamber.
  • annular groove 2621 is provided on the valve body 262 , and an annular boss 2641 matching the annular groove 2621 is arranged on the valve core 264 to form a plug-in seal.
  • the ring-shaped boss 2641 is connected to the ring-shaped groove 2621 in a rotational and sealing manner, so that the valve core 264 can rotate in the valve body 262 in a circumferential direction, and the sealing performance of detergent can be increased when the detergent is put in.
  • an annular boss 2641 and an annular groove 2621 are respectively provided on the valve core 264 of the switching valve 26 and the valve body 262 to form a plug-in seal between the valve core 264 and the valve body 262, Realize that the valve core 264 is rotationally and sealedly connected with respect to the valve body 262, cooperates with a plurality of liquid inlets 261 and liquid outlets 263 on the outer peripheral wall of the valve body 262, and is connected with the inlet 2643 inside the valve core 264 , the liquid inlet passage 2642 and the outlet 2648, under the drive of the stepping motor, the spool 264 can be selectively connected or disconnected with one of the multiple liquid inlets 261, the inlet 2643, the outlet 2648 are connected to the The liquid outlet 263 is connected to realize the precise delivery of detergent.
  • the switching valve 26 is controlled by a stepping motor so that the liquid outlet 263 is connected to or disconnected from multiple liquid inlets 261, and various detergents can be injected through the switching valve 26.
  • the structure is simple, the space occupied is small, and the cost is low.
  • the present invention also provides a washing machine, which includes any one of the above-mentioned external detergent switching and dispensing devices 2 .
  • the present invention can also be arranged inside the washing machine, and is not limited to be arranged in washing equipment such as clothes dryers, nursing machines, and dishwashers.

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Abstract

本发明公开了一种外置洗涤剂切换投放装置及洗衣机，包括切换阀，所述切换阀包括阀体和阀芯，所述阀体的侧部具有多个进液口，沿圆周方向间隔设置，所述阀体的端部具有出液口，设置在所述端部的中心位置；所述阀芯可转动的设置在所述阀体中，所述阀芯的外周壁与所述阀体的内周壁转动密封连接，所述阀芯的外壁上设有出口，用于与进液口连通；所述阀体的出液口与所述阀芯的出口之间转动密封连接。本发明在阀体的侧部上设置多个进液口，在切换阀的端部设置出液口，所述出液口与所述阀芯的出口之间设有密封结构，实现阀芯相对于阀体可转动，提高切换阀投放时的密封性，防止所述阀芯相对于阀体之间转动时，造成洗涤剂泄露，增加用户体验。

Description

一种外置洗涤剂切换投放装置及洗衣机 技术领域
本发明属于洗衣机领域，具体地说，涉及一种外置洗涤剂切换投放装置及洗衣机。
背景技术
目前，洗衣设备的智能化发展，洗衣机的功能越来越多，极大方便了人们的多种洗衣要求，其中，洗涤剂自动投放功能不需要用户手动投放洗涤剂，节省用户操作，因此，用户对洗涤剂自动投放功能的需求越来越大。
但是，现有的自动投放洗衣机通常会投放多种洗涤剂，如洗衣液、柔顺剂、消毒液等。通常是多个投放泵来分别进行投放，投放泵数量较多，结构复杂，占用空间大、成本高，并且在运行时，因投放泵数量造成密封性不好，影响用户体验。
有鉴于此特提出本发明。
发明内容
本发明要解决的技术问题在于克服现有技术的不足，提供一种外置洗涤剂切换投放装置，包括切换阀，本发明在阀体的侧部上设置多个进液口，在切换阀的端部设置出液口，所述出液口与所述阀芯的出口之间设有密封结构，实现阀芯相对于阀体可转动，同时，提高切换阀投放时的密封性，防止在工作时，所述阀芯相对于阀体之间转动时，造成洗涤剂泄露，增加用户体验。
本发明的另一个目的在于提供一种洗衣机，实现多种洗涤剂的投放，结构简单、密封性好。
为解决上述技术问题，本发明采用技术方案的基本构思是：一种外置洗涤剂切换投放装置，包括切换阀，所述切换阀包括，
阀体，所述阀体的侧部具有多个进液口，沿圆周方向间隔设置，所述阀体的端部具有出液口，设置在所述端部的中心位置；
阀芯，可转动的设置在所述阀体中，所述阀芯的外周壁与所述阀体的内周壁转动密封连接，所述阀芯的外壁上设有出口，用于与进液口连通；
所述阀体的出液口与所述阀芯的出口之间转动密封连接。
进一步地，所述出液口与所述出口之间设有相匹配的转动密封结构。
进一步地，所述转动密封包括第一密封结构，设置在所述出口的外周，所述第一密封结构向所述阀体的出液口方向凸出设置；
优选地，所述第一密封结构为环形凸台。
进一步地，所述转动密封结构还包括第二密封结构，设置在所述出液口外周的阀体内侧壁上，与所述第一密封结构转动接触密封；
优选地，所述第二密封结构为环形凹槽。
进一步地，所述阀芯包括，
轴座，用于安装转动轴；
支撑座，自所述轴座的外周壁沿所述轴座的径向向外延伸设置；
外周板，外周板的内周与所述支撑座的外周连接，所述外周板上设有入口与所述出口连通，用于在阀芯转动时可选择的与多个进液口中的一个进液口连通或断开，所述入口与所述出口连通；
所述出口设置在所述轴座轴向的一端部的中心位置，与所述出液口相对设 置；所述第一密封结构设置在所述出口外周的轴座上。
进一步地，所述阀芯内具有连通所述入口与所述出口的进液通道；
所述进液通道包括，
第一进液通道，设置在所述阀芯内，所述第一进液通道的一端与所述入口连通，另一端自所述支撑座内沿径向延伸至所述轴座内；
第二进液通道，设置在所述轴座中，所述第二进液通道的一端与所述第一进液通道的另一端连接，另一端延伸至所述出口。
进一步地，所述阀体具有所述出液口的内周壁与相对的所述外周板边沿之间设有相匹配的倒角结构。
进一步地，所述阀芯的支撑座的端部设有定位凸，连接在所述第一密封结构的外周壁与所述外周板的内周壁之间；
所述阀体具有出液口的内侧壁上设有限位筋，沿周向间隔设置；所述定位凸可与所述限位筋相抵接，用于限定阀芯的转动范围；
优选地，所述定位凸沿所述轴座的径向延伸设置，连接在所述第一密封结构的外周壁与所述外周板的内周壁之间；所述限位筋沿所述阀体的端部的径向延伸设置。
进一步地，还包括电机，设置在所述切换阀的出液口相对的另一端，与所述阀芯连接，用于控制所述阀芯相对于所述阀体转动；
优选地，还包括洗涤剂盒，具有多个洗涤剂投放腔与所述多个进液口一一对应；所述第一进液口与进水管连通，用于清洗投放腔。
一种洗衣机包括上述权利要求1-9任一所述的一种外置洗涤剂切换投放装 置。
采用上述技术方案后，本发明与现有技术相比具有以下有益效果。
(1)本发明在阀体的侧部设置多个进液口，在阀体的端部设置出液口，切换阀可以控制出液口与多个进液口连通或断开，多种洗涤剂可以通过切换阀进行投放，结构简单、占用空间小、成本低。
(2)本发明通过在出液口与出口之间设有相匹配的转动密封结构，使阀芯和阀体实现插接式密封，增加了切换阀的密封性，实现在阀芯相对于阀体转动时，防止投放洗涤剂时泄露，设置步进电机控制切换阀进行不同阶段的洗涤剂选择和投放，可以实现投放装置的连续控制，并且提高了洗涤剂投放装置的控制精度。
(3)通过在阀芯内设置一个进液通道，进液通道的两端分别于多个进液口中的一个和出液口连通，既能实现不同洗涤剂的投放，还可以在投放时封闭其它进液口，防止泄露，提高了切换阀整体密封性。
下面结合附图对本发明的具体实施方式作进一步详细的描述。
附图说明
附图作为本发明的一部分，用来提供对本发明的进一步的理解，本发明的示意性实施例及其说明用于解释本发明，但不构成对本发明的不当限定。显然，下面描述中的附图仅仅是一些实施例，对于本领域普通技术人员来说，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图。在附图中：
图1是本发明外置洗涤剂投放装置与洗衣机连接示意图；
图2是本发明外置洗涤剂投放装置整体结构图；
图3是本发明外置洗涤剂投放装置中投放装置结构图；
图4是本发明外置洗涤剂投放装置中切换阀结构图；
图5是本发明外置洗涤剂投放装置图4的俯视图；
图6是本发明外置洗涤剂投放装置图5的剖视图；
图7是本发明外置洗涤剂投放装置图6的C处放大图；
图8是本发明外置洗涤剂投放装置中阀体示意图；
图9是本发明外置洗涤剂投放装置中阀芯示意图；
图10是本发明外置洗涤剂投放装置图5的剖视图；
图11是本发明外置洗涤剂投放装置中切换阀示意图；
图12是本发明外置洗涤剂投放装置中切换阀示意图。
图中：1、显示屏；2、外置洗涤剂切换投放装置；21、壳体；22、洗涤剂盒；23、步进电机；24、投放泵；25、洗涤剂盒安装基座；26、切换阀；261、进液口；2611、进水口；262、阀体；2621、环形凹槽；2622、限位筋；263、出液口；264、阀芯；2641、环形凸台；2642、进液通道；2643、入口；2644、定位凸；2645、轴座；2646、支撑座；2647、外周板；2648、出口；3、进水管；4、出水管；5、处理剂盒；6、控制面板；7、门盖；8、清洁盖板。
需要说明的是，这些附图和文字描述并不旨在以任何方式限制本发明的构思范围，而是通过参考特定实施例为本领域技术人员说明本发明的概念。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对实施例中的技术方案进行清楚、完整地描述，以下实施例用于说明本发明，但不用来限制本发明的范围。
在本发明的描述中，需要说明的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
如图1至图12所示，本发明所述的一种外置洗涤剂切换投放装置，包括切换阀26。
所述切换阀26包括阀体262和阀芯264。
所述阀体262的侧部具有多个进液口261，沿圆周方向间隔设置，所述阀体262的端部具有出液口263，设置在所述端部的中心位置。
所述阀芯264可转动的设置在所述阀体262中，所述阀芯264的外周壁与所述阀体262的内周壁转动密封连接，所述阀芯264的外壁上设有出口2648，用于与进液口连通。
所述阀体262的出液口263与所述阀芯264的出口2648之间转动密封连接。
本发明通过在所述阀体262的出液口263与所述阀芯264的出口2648之间转动密封连接，在实现所述阀芯264相对于所述阀体262转动的同时，提高切换阀26的密封性，防止在所述阀芯264相对于阀体262进行转动时，造成洗涤 剂泄露，增加用户体验。
在本发明中，所述阀体262的侧部设置多个进液口261，在所述切换阀26的端部中心位置设置出液口263，可以实现多种洗涤剂通过切换阀26分别进行投放，结构简单、占用空间小、成本低。
如图1至图3所示，外置洗涤剂切换投放装置2通过进水管3和出水管4与洗衣机连接。所述外置洗涤剂切换投放装置2包括壳体21，所述壳体21上具有显示屏1，由于显示洗涤剂的状态。
所述进水管3与所述出水管4内均设有单向阀，防止液体回流。
还包括投放泵24，投放泵24与所述切换阀26通过管道进行连接，切换阀26内的洗涤剂通过投放泵24与进水管3和出水管4连通，用于投放洗涤剂和清洗切换阀26。
如图4至图6所示，本发明在阀体262的侧部上设置多个进液口261，在阀体262的端部设置出液口263，阀芯264可转动的设置在所述阀体262内，所述阀芯264外周壁上设置的入口2643可选择的与阀体262上设置的多个进液口261的其中一个进行连通，使其中一个进液口与所述出液口263进行连通，实现对洗涤剂的投放。在阀芯264的上只设置一个入口2643，降低了切换阀26结构的复杂性、降低了成本，实现洗涤剂种类的精准投放。
进一步地，所述出液口263与所述出口2648之间设有相匹配的转动密封结构。
本发明通过将所述转动密封结构设置在所述出液口263与所述出口2648之间，在进行洗涤剂在进行投放时，所述转动密封结构靠近所述出液口263，便于洗涤剂顺利的进入清洗腔内，减小了洗涤剂在切换阀26内的残留量，提升了洗 涤效果。
所述转动密封结构包括第一转动密封结构和第二转动密封结构。
所述第一密封结构设置在所述出口2648的外周，所述第一密封结构向所述阀体262的出液口263方向凸出设置。
优选地，所述第一密封结构为环形凸台2641。
通过将所述环形凸台2641设置在所述出口2648的外周，沿所述阀体262的出液口263方向延伸设置，方便与所述出液口263进行配合，所述环形凸台2641可以直接与所述出液口263的内壁转动密封连接，形成插接式密封，提高在进行洗涤剂投放时，切换阀26的密封性，提高洗涤效果，增加用户体验。
所述第二密封结构设置在所述出液口263外周的阀体262内侧壁上，与所述第一密封结构转动接触密封。
优选地，所述第二密封结构为环形凹槽2621。
通过将所述环形凹槽2621设置在所述出液口263外周的阀体262内侧壁上，可以与所述出口2648的外周设置的环形凸台2641进行配合，将所述环形凸台2641安装在所述环形凹槽2621中，形成插接式密封，所述环形凸台2641插入到环形凹槽2621中实现所述阀芯264在所述阀体262内进行周向转动，增加洗涤剂在投放时的密封性。
具体地，如图6至图7所示，所述阀芯264的外壁上设有出口2648，所述出口2648与所述出液口263连通，所述密封结构设置在所述出口2648与所述出液口263的连通处。
本发明通过在所述阀芯264的一端部上设置与所述出液口263连通的入口2643，所述密封结构设置在所述出口2648与所述出液口263的连通处，固定所 述出口2648与所述出液口263连通，同时，在所述阀芯264进行转动时，使所述出口2648与所述出液口263一直连通，减少了投放泵24的个数、结构简单，实现多种洗涤剂，通过一个切换阀26进行投放，提高了切换阀26的实用性，增加了用户体验。
进一步地，所述阀芯264包括轴座2645、支撑座2646和外周板2647。
所述轴座2645用于安装转动轴。
所述转动轴所述转动轴可转动的密封穿设在所述出液口263相对的另一端部中，与所述阀芯264连接，用于带动所述阀芯264在所述阀体262内转动。
所述支撑座2646自所述轴座2645的外周壁沿所述轴座2645的径向向外延伸设置。
所述外周板2647的内周与所述支撑座2646的外周连接，所述外周板2647上设有入口2643，用于在阀芯264转动时可选择的与多个进液口261中的一个进液口连通或断开，所述入口2643与所述出口2648连通。
所述出口2648设置在所述轴座2645轴向的一端部的中心位置，与所述出液口263相对设置；所述第一密封结构设置在所述出口2648外周的轴座2645上。
具体地，如图8至图9所示，所述环形凸台2641设置在所述出口2648外周的轴座2645上，沿所述轴座2645的轴向延伸设置，所述环形凹槽2621设置在所述阀体262的出液口263外周的阀体262内侧壁上，沿所述出液口263环形设置，向所述出液口263的出液方向延伸设置。
优选地，所述出液口263与所述出口2648等径，所述环形凸台2641与所述环形凹槽2621相匹配且分别大于所述出口2648与所述出液口263的内径。
所述环形凸台2641可以设置在所述出液口263外周的阀体262内侧壁上，沿所述阀体262的内侧壁向出液方向相反的方向延伸设置，所述环形凹槽2621设置在所述出口2648的外周的轴座2645上，沿出液相反的方向延伸设置。所述环形凸台2641与所述环形凹槽2621形成插接式密封。
进一步地，所述阀芯264内具有连通所述入口2643与所述出口2648的进液通道2642。
通过在所述阀芯264内设置进液通道2642，与所述出液口263和所述阀芯264上的入口2643连通，使阀芯264在进行转动时，实现多种洗涤剂可以通过阀芯264内的进液通道2642一一对应投放或进水对切换阀26内进行冲洗，提高了不同洗涤剂种类的投放精准度或清洗切换阀。
所述进液通道2642与所述入口2643进行连通实现对其他进液口进行封堵，防止投放时，其它洗涤剂泄露，提高了切换阀26的密封性。在所述阀芯264上只设置一个入口2643，避免了多个入口的复杂性和误操作性，提高了切换阀26的控制精度，增加了用户的体验。
所述进液通道2642包括第一进液通道和第二进液通道。
所述第一进液通道设置在所述阀芯264内，所述第一进液通道的一端与所述入口2643连通，另一端自所述支撑座2646内沿径向延伸至所述轴座2645内。
所述第二进液通道设置在所述轴座中，所述第二进液通道的一端与所述第一进液通道的另一端连接，另一端延伸至所述出口2648。
在进行洗涤剂投放或进水时，依次通过入口2643、第一进液通道、第二进液通道和所述出液口263，进行投放或清洗。
本发明通过将所述环形凸台2641设置在所述第二通道上与所述出液口263 进行连接，所述环形凹槽2621设置在所述出液口263的外周，所述环形凸台2641与所述环形凹槽2621进行配合，所述第二进液通道与所述出液口263连通，使所述第二进液通道不会因为阀芯264进行转动，造成第二进液通道偏离所述出液口263，防止控制不精确，提升装置的密封性和实用性，增加用户的体验。
进一步地，所述阀体262具有所述出液口263的内周壁与相对的所述外周板2647边沿之间设有相匹配的倒角结构。
本发明通过设置外周板2647，在所述阀体262与所述外周板2647上设置相匹配倒角结构，实现了外周板2647与所述阀体262的内周壁接触密封。所述外周板2647上只设置一个入口2643，可以在进行投放时，与多个进液口261中的一个，并封堵其它进液口。通过外周板2647上设置的入口2643转动至多个进液口261的其中一个相对时，相对的进液口与所述阀芯264内的进液通道2642连通，第二进液通道处的环形凸台2641与所述出液口263处的环形凹槽2621实现接插式密封，定量的洗涤剂从出液口263进行投放。
所述多个进液口261中的一进液口为进水口2611
洗涤剂投放结束后，所述阀芯264进行转动，所述外周板2647上的入口2643转动至进水口2611，与所述进水口2611连通，所述第二进液通道与所述出液口263在所述环形凹槽2621与所述环形凸台2641的限制下一直连通，然后水流冲刷阀体262内部至清洗设备中，实现洗涤剂投放或清洗。
通过设置支撑座2646增加了切换阀26的旋转强度，在所述阀体262与所述外周板2647的切合面上设置倒角结构，使所述阀体262与所述阀芯264的配合更加的紧密，投放洗涤剂时，可以通过倒角结构引导至所述阀芯264与所述阀体262的接触面上，实现自润滑作用，也便于安装阀芯264。
进一步地，所述阀芯264的支撑座2646的端部设有定位凸2644，连接在所述第一密封结构的外周壁与所述外周板2647的内周壁之间。
所述阀体262具有出液口263的内侧壁上设有限位筋2622，沿周向间隔设置。
具体地，所述定位凸2644沿所述轴座2645的径向延伸设置；所述限位筋2622沿所述阀体262的端部的径向延伸设置。
所述定位凸2644可与所述限位筋2622相抵接，用于限定阀芯264的转动范围。
所述限位筋2622为两个，所述阀芯264的支撑座2646的端部设有定位凸2644，连接在所述外周板2647与所述环形凸台2641之间，所述两限位筋2622可分别与所述限位筋2622抵接，用于限定所述阀芯264的转动范围在预设范围内。
进一步地，还包括电机，设置在所述切换阀26的出液口263相对的另一端，与所述阀芯264连接，用于控制所述阀芯264相对于所述阀体262转动。
优选地，所述电机为步进电机23。
通过在所述出液口263的端部的周向上设置限位筋2622，可以与所述支撑座2646的端部上定位凸2644进行配合，使切换阀26在步进电机的控制下运行，限位筋2622与所述定位凸2644接触时，步进电机阻转，切换阀26不进行洗涤剂投放状态，使切换阀26控制精度更加准确，增加用户体验。
转动轴设置在所述切换阀26与所述出液口263相对的一端，与电机进行连接，所述转轴、步进电机23与所述阀芯264同轴设置，所述步进电机23驱动所述转动轴带动所述阀芯264进行转动。所述步进电机23通过连接件与所述切 换阀26连接。
优选地，还包括洗涤剂盒22，具有多个洗涤剂投放腔与所述多个进液口261一一对应；所述多个进液口261中的进水口2611与进水管3连通，用于清洗投放腔。
本发明通过在所述阀体262上设置环形凹槽2621，所述阀芯264上设置于所述环形凹槽2621匹配的环形凸台2641，形成插接式密封。所述环形凸台2641与环形凹槽2621中转动密封连接，实现所述阀芯264在所述阀体262内进行周向转动，增加洗涤剂在投放时的密封性。
本发明通过在所述切换阀26的阀芯264与所述阀体262上分别设置环形凸台2641与环形凹槽2621，将所述阀芯264与所述阀体262形成插接式密封，实现所述阀芯264相对于所述阀体262转动密封连接，配合所述阀体262的外周壁上的多个进液口261和出液口263，与所述阀芯264内部的入口2643、进液通道2642和出口2648，在步进电机的带动下实现阀芯264可选择的与多个进液口261中的一个进液口连通或断开，所述入口2643、出口2648与所述出液口263连通，实现对洗涤剂的精准投放。
本发明通过步进电机控制切换阀26使出液口263与多个进液口261连通或断开，多种洗涤剂可以通过切换阀26进行投放，结构简单、占用空间小，成本低。
本发明还提供一种洗衣机，所述洗衣机包括上述任一所述的外置洗涤剂切换投放装置2。
本发明还可设置在所述洗衣机的内部，不限于设置在干衣机、护理机以及洗碗机等洗涤设备。
以上所述仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专利的技术人员在不脱离本发明技术方案范围内，当可利用上述提示的技术内容作出些许更动或修饰为等同变化的等效实施例，上述实施例中的实施方案也可以进一步组合或者替换，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明方案的范围内。

Claims (10)

  1. 一种外置洗涤剂切换投放装置，其特征在于：包括切换阀，所述切换阀包括，
    阀体，所述阀体的侧部具有多个进液口，沿圆周方向间隔设置，所述阀体的端部具有出液口，设置在所述端部的中心位置；
    阀芯，可转动的设置在所述阀体中，所述阀芯的外周壁与所述阀体的内周壁转动密封连接，所述阀芯的外壁上设有出口，用于与进液口连通；
    所述阀体的出液口与所述阀芯的出口之间转动密封连接。
  2. 根据权利要求1所述的一种外置洗涤剂切换投放装置，其特征在于：所述出液口与所述出口之间设有相匹配的转动密封结构。
  3. 根据权利要求2所述的一种外置洗涤剂切换投放装置，其特征在于：所述转动密封包括第一密封结构，设置在所述出口的外周，所述第一密封结构向所述阀体的出液口方向凸出设置；
    优选地，所述第一密封结构为环形凸台。
  4. 根据权利要求3所述的一种外置洗涤剂切换投放装置，其特征在于：所述转动密封结构还包括第二密封结构，设置在所述出液口外周的阀体内侧壁上，与所述第一密封结构转动接触密封；
    优选地，所述第二密封结构为环形凹槽。
  5. 根据权利要求1-4任一所述的一种外置洗涤剂切换投放装置，其特征在于：所述阀芯包括，
    轴座，用于安装转动轴；
    支撑座，自所述轴座的外周壁沿所述轴座的径向向外延伸设置；
    外周板，外周板的内周与所述支撑座的外周连接，所述外周板上设有入口，用于在阀芯转动时可选择的与多个进液口中的一个进液口连通或断开，所述入口与所述出口连通；
    所述出口设置在所述轴座轴向的一端部的中心位置，与所述出液口相对设置；所述第一密封结构设置在所述出口外周的轴座上。
  6. 根据权利要求5所述的一种外置洗涤剂切换投放装置，其特征在于：所述阀芯内具有连通所述入口与所述出口的进液通道；
    所述进液通道包括，
    第一进液通道，设置在所述阀芯内，所述第一进液通道的一端与所述入口连通，另一端自所述支撑座内沿径向延伸至所述轴座内；
    第二进液通道，设置在所述轴座中，所述第二进液通道的一端与所述第一进液通道的另一端连接，另一端延伸至所述出口。
  7. 根据权利要求5所述的一种外置洗涤剂切换投放装置，其特征在于：所述阀体具有所述出液口的内周壁与相对的所述外周板的边沿之间设有相匹配的倒角结构。
  8. 根据权利要求1-7任一所述的一种外置洗涤剂切换投放装置，其特征在于：所述阀芯的支撑座的端部设有定位凸，所述阀体具有出液口的内侧壁上设有限位筋，沿周向间隔设置；所述定位凸可与所述限位筋相抵接，用于限定阀芯的转动范围；
    优选地，所述定位凸沿所述轴座的径向延伸设置，连接在所述第一密封结构的外周壁与所述外周板的内周壁之间；所述限位筋沿所述阀体的端部的径向延伸设置。
  9. 根据权利要求1所述的一种外置洗涤剂切换投放装置，其特征在于：还包括电机，设置在所述切换阀的出液口相对的另一端，与所述阀芯连接，用于控制所述阀芯相对于所述阀体转动；
    优选地，还包括洗涤剂盒，具有多个洗涤剂投放腔与所述多个进液口一一对应；所述多个进液口中的一进液口与进水管连通，用于清洗投放腔。
  10. 一种洗衣机，其特征在于：包括上述权利要求1-9任一所述的一种外置洗涤剂切换投放装置。
PCT/CN2022/126377 2021-11-08 2022-10-20 一种外置洗涤剂切换投放装置及洗衣机 WO2023078092A1 (zh)

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