CN111172701B - Drum washing machine - Google Patents

Drum washing machine Download PDF

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Publication number
CN111172701B
CN111172701B CN201811237076.0A CN201811237076A CN111172701B CN 111172701 B CN111172701 B CN 111172701B CN 201811237076 A CN201811237076 A CN 201811237076A CN 111172701 B CN111172701 B CN 111172701B
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CN
China
Prior art keywords
drum
washing machine
water
inner cylinder
locking
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CN201811237076.0A
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Chinese (zh)
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CN111172701A (en
Inventor
赵志强
许升
吕佩师
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Qingdao Haier Washing Electric Appliance Co Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Washing Electric Appliance Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Washing Electric Appliance Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Washing Electric Appliance Co Ltd
Priority to CN201811237076.0A priority Critical patent/CN111172701B/en
Priority to PCT/CN2019/111396 priority patent/WO2020083078A1/en
Publication of CN111172701A publication Critical patent/CN111172701A/en
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Publication of CN111172701B publication Critical patent/CN111172701B/en
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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
    • D06F23/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry 
    • D06F23/02—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a horizontal axis
    • D06F23/025—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry  and rotating or oscillating about a horizontal axis with a rotatable imperforate tub
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/26—Casings; Tubs
    • D06F37/267—Tubs specially adapted for mounting thereto components or devices not provided for in preceding subgroups
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

The invention provides a drum washing machine, which comprises an inner drum, a position detection device and a control device, wherein the inner drum is a non-porous inner drum and is used for containing washing water when clothes are washed, and the position detection device is used for detecting the position of the inner drum. The invention provides a drum washing machine with a non-porous inner barrel front opening structure, which has a simple structure, and can greatly reduce the washing water consumption of the washing machine without filling washing/rinsing water between an inner barrel and an outer barrel. The possibility of dirt adhesion between the inner cylinder and the outer cylinder is avoided. The user health and user experience are greatly improved, and water resources are greatly saved.

Description

Drum washing machine
Technical Field
The invention relates to the technical field of laundry equipment, in particular to a drum washing machine.
Background
The washing machine is used as a household appliance which is widely used in daily life of people, helps people get rid of the trouble of washing clothes, and brings great convenience to people. However, the washing machine has certain disadvantages, such as long time consumption, large water consumption, and the like, and with the development of the society, water resources become more and more important as an important natural resource, the awareness of water saving of people is also improved, and how to realize the water saving function of the washing machine is very important.
In order to solve the water-saving problem of the washing machine, some patents are also provided at present, for example, patent No. 201410215346.3, which is named as a Chinese invention patent of a drum washing machine, and the invention relates to a drum washing machine, which comprises a box body, an inner drum and an outer drum are arranged in the box body, a door seal is arranged between the outer drum and the box body, the inner drum is connected with a driving device, the inner drum is a non-porous inner drum, the inner drum is a conical drum with a small diameter at the drum bottom and a large diameter at the drum opening, the drum opening of the inner drum is inwards folded in an arc shape, a water inlet conduit is arranged on the door seal, one end of the water inlet conduit is connected with a washing water rapid heating device, the other end of the water inlet conduit penetrates through the door seal and extends into the inner drum, and a water outlet and a water pressure detection device are arranged on the outer drum. According to the technical scheme, the inner barrel is a non-porous inner barrel, water is fed into the inner barrel through the water inlet guide pipe arranged on the door seal, and water is drained in the dehydration process through the shape of the inner barrel, so that water can be prevented from being stored between the inner barrel and the outer barrel, and the washing water consumption is greatly saved.
Said invention provides a drum washing machine with holeless inner drum, but only the inner drum of existent drum washing machine is designed into the holeless structure, so that its practical significance is very small. Because the clothes need to be soaked by certain washing water, if the soaking effect is to be realized, a certain amount of water needs to be stored in the imperforate inner cylinder, so that the load of the motor is increased, and the problems of power consumption and the like are also solved. In addition, the drum washing machine disclosed in the patent adopts a water inlet mode through a door seal, the door seal mainly has the effect of sealing the opening of the outer drum of the washing machine, a water inlet guide pipe is arranged on the door seal, the sealing effect of the door seal is easily influenced, the realization is difficult, and the detection of the water level of the water inlet in the inner drum cannot be realized.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
In order to solve the above problems, the present invention provides a drum washing machine, specifically, the following technical solutions are adopted:
a drum washing machine comprises an inner drum which is a non-porous inner drum and is used for containing washing water when clothes are washed, and a position detection device used for detecting the position of the inner drum.
Further, drum type washing machine include driving motor and inner tube axle, driving motor includes stator and rotor, rotor and inner tube axle fixed connection drive the inner tube and rotate, position detection device include position sensor and detected the terminal, the terminal that is detected set up on the rotor, position sensor fix with detect the corresponding position of terminal.
Further, the drum washing machine comprises an outer drum, the position sensor is arranged on one side of the outer drum close to the driving motor, and the position sensor and the detected terminal are arranged in a spaced and corresponding mode.
Further, the position sensor is an electromagnetic position sensor, a photoelectric position sensor, a differential voltage sensor, an eddy current sensor, a capacitive sensor, a reed pipe sensor, or a hall sensor.
Further, the drum washing machine comprises a locking mechanism for locking the rotation of the inner drum, the position detection device is used for detecting whether the inner drum is locked in place after the locking mechanism locks the inner drum, and/or the locking mechanism locks the inner drum after the position detection device detects that the inner drum rotates to a set position.
Further, locking mechanism install on the urceolus be close to driving motor's lateral wall, locking mechanism includes telescopic motion's locking pole and the locking motor who drives locking pole telescopic motion, correspond the locking pole setting rather than complex locking groove on driving motor's the rotor, when the locking pole stretches out under locking motor's drive and inserts the locking inslot, the inner tube is locked.
Furthermore, an inner cylinder drain hole is formed in the side wall of the inner cylinder, a normally closed one-way valve plug is mounted on the inner cylinder drain hole, and a push rod mechanism for pushing the one-way valve plug open to drain water is mounted on the outer cylinder; the locking mechanism jacks the one-way valve plug to drain water after the inner cylinder is locked by the locking mechanism.
Furthermore, the ejector rod mechanism is arranged on the outer cylinder and comprises an ejector rod which moves in a telescopic mode and an ejector rod motor which drives the ejector rod to move in a telescopic mode, and the ejector rod penetrates through the cylinder wall of the outer cylinder and is inserted into the water discharging hole of the inner cylinder to jack the one-way valve plug open for water discharging.
Further, the drum washing machine comprises a main controller, and the position detection sensor, the locking motor and the ejector rod motor are electrically connected with the main controller.
Furthermore, set up a plurality of dehydration holes on the lateral wall of inner tube, all install the centrifugal valve on the dehydration hole, the centrifugal valve open under the effect of dehydration centrifugal force and dewater the drainage.
The invention provides a drum washing machine with a non-porous inner barrel front opening structure, which has a simple structure, and can greatly reduce the washing water consumption of the washing machine without filling washing/rinsing water between an inner barrel and an outer barrel. The possibility of dirt adhesion between the inner cylinder and the outer cylinder is avoided. The user health and user experience are greatly improved, and water resources are greatly saved.
Drawings
FIG. 1 is a schematic view of a drum washing machine according to an embodiment of the present invention;
FIG. 2 is a schematic view of a second drum washing machine according to an embodiment of the present invention (embodiment one);
FIG. 3 is a schematic view of a drum washing machine according to a second embodiment of the present invention (second embodiment);
FIG. 4 is a schematic view of a drum washing machine according to an embodiment of the present invention (embodiment III);
FIG. 5 is a schematic view of a three-drum washing machine according to an embodiment of the present invention;
FIG. 6 is a partially enlarged view (pressure relief state) of FIG. 5 of a three-drum washing machine according to an embodiment of the present invention; (ii) a
FIG. 7 is a partial enlarged view (pressurized state) of FIG. 5 of the three-drum washing machine according to the embodiment of the present invention;
FIG. 8 is a schematic view of a four-drum washing machine according to an embodiment of the present invention;
FIG. 9 is an enlarged view of a portion of FIG. 8 of a four-drum washing machine according to an embodiment of the present invention (in a pressure-released state in the first embodiment);
FIG. 10 is an enlarged view of a portion of FIG. 8 of a four-drum washing machine according to an embodiment of the present invention (pressurized state in the first embodiment);
FIG. 11 is an enlarged view of a portion of FIG. 8 of a four-drum washing machine according to an embodiment of the present invention (in a pressure-released state in the second embodiment);
FIG. 12 is an enlarged partial view of FIG. 8 (pressurized state in the second embodiment) of a four-drum washing machine according to an embodiment of the present invention;
FIG. 13 is a schematic view of a five drum washing machine according to an embodiment of the present invention;
FIG. 14 is a bottom view of a five drum washing machine according to an embodiment of the present invention;
FIG. 15 is a schematic perspective view of a five-drum washing machine according to an embodiment of the present invention;
FIG. 16 is an enlarged partial view of FIG. 15 of the five drum washing machine according to the embodiment of the present invention;
FIG. 17 is a schematic view of a six-drum washing machine according to an embodiment of the present invention (first embodiment);
FIG. 18 is a schematic view of a six-drum washing machine according to an embodiment of the present invention (second embodiment);
FIG. 19 is a block flow diagram of an embodiment of a control method for a seven-drum washing machine according to an embodiment of the present invention.
Detailed Description
A drum washing machine according to the present invention will be described in detail with reference to the accompanying drawings:
as shown in fig. 1 to 18, the present embodiment provides a drum washing machine with a holeless inner tub front opening structure, which has a simple structure, and can greatly reduce the amount of washing water of the washing machine without filling washing/rinsing water between the inner tub and the outer tub. The possibility of dirt adhesion between the inner cylinder and the outer cylinder is avoided. The user health and user experience are greatly improved, and water resources are greatly saved.
The drum washing machine of the present embodiment has a housing 19, and the housing 19 includes: a top deck 2, a front panel, a back panel and a bottom panel. The bottom plate is provided with feet 9 for supporting the whole washing machine. The outer casing 19 has an outer cylinder 18 inside, and an inner cylinder 17 is coaxially disposed inside the outer cylinder 18. The outer cylinder 18 is mainly used for collecting the drainage of the inner cylinder 17 and the drainage of the inner cylinder 17 by high-speed centrifugal dehydration. The drum 17 rotates, preferably with lifting ribs 43, and is continuously lifted and dropped to beat the laundry, so as to wash the laundry. The inner barrel 17 is of non-porous construction. The outer cylinder 18 has a central mounting hole to which the bearing 12 is fixedly mounted. An inner drum shaft 13, which is fixedly connected to the inner drum 17, passes through the bearing 12 shown and is connected to a drive motor 16. An openable/closable inner cylinder door 6 is installed on a front cylinder opening of the inner cylinder 17, thereby realizing that the inner cylinder 17 is of a sealed cabin structure.
The housing 19 of this embodiment is provided with an openable/closable door 5.
Example one
The embodiment mainly solves the problem of how to accurately determine the water inflow of the drum washing machine with the non-porous inner drum, and the specific scheme is as follows:
a drum washing machine comprises an inner drum 17 and a water inlet pipeline communicated with the inner drum 17, wherein the inner drum 17 is a non-porous inner drum and is used for containing washing water when clothes are washed, and a flow sensor 1 used for detecting the flow of the inlet water is arranged on the water inlet pipeline.
In the embodiment, the flow sensor 1 is arranged on the water inlet pipeline to monitor the flow rate of water inflow, and when the set water inflow is reached, the water inlet valve 20 is closed to finish water inflow. The embodiment adopts the flow sensor to solve the problem of water inlet of the drum washing machine with the non-porous inner drum according to the set water level, ensures the washing effect, has simple structure and is convenient to control.
Further, the drum washing machine of the embodiment includes a water inlet valve 20 and a detergent box 3, the water inlet pipeline includes a first water inlet pipe and a second water inlet pipe, the outlet end of the water inlet valve 20 is communicated with the detergent box 3 through the first water inlet pipe, the outlet end of the detergent box 3 is communicated with the inner barrel 17 through the second water inlet pipe, and the flow sensor 1 is arranged on the first water inlet pipe or the second water inlet pipe.
Preferably, the flow sensor 1 is disposed on the first water inlet pipe, so that the detergent in the detergent box can be placed into the flow sensor 1.
The drum washing machine of the embodiment comprises a main controller 4, and the flow sensor 1 is electrically connected with the main controller 4 through a line. The main controller 4 can collect the water inflow of the inner cylinder 17 in real time to reach the set water inflow, and the water inlet valve 20 is closed.
As an implementation manner of this embodiment, the flow sensor 1 is a rotor flow sensor, or a turbine flow sensor, or an ultrasonic flow sensor, or an electromagnetic flow sensor, or an orifice flow sensor.
In this embodiment, the flow sensor 1 may be disposed at any position on the water inlet pipeline, preferably, at the rear portion of the water inlet valve 20, and precisely measures the water flow entering the sealed inner cylinder 17, the flow sensor 1 is connected to the main controller 4 through a line, and the main controller 4 may collect the water inflow of the inner cylinder 17 in real time to set the water inflow and close the water inlet valve 20.
In order to realize water inlet into the nonporous inner barrel, the drum washing machine of the embodiment comprises a driving motor 16 and an inner barrel shaft 13, wherein the driving motor 16 is in transmission connection with the inner barrel 17 through the inner barrel shaft 13 to drive the inner barrel 17 to rotate, a hollow channel 14 communicated with the inside of the inner barrel 17 is arranged in the inner barrel shaft 13, and the water inlet pipeline is communicated with the hollow channel of the inner barrel shaft 13.
Specifically, the inner cylinder shaft 13 is connected with a driving motor 16, the driving motor 16 comprises a stator and a rotor, and the rotor is fixedly connected with the inner cylinder shaft 13; the center of the rotor is provided with a through hole, and the water inlet pipeline penetrates through the through hole of the rotor and is communicated with the hollow channel 14 of the inner cylinder shaft 13.
Furthermore, a first dynamic sealing structure 15 is arranged between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is arranged between the through hole of the rotor and the hollow channel 14 of the inner cylinder shaft 13.
In order to realize the drainage of the imperforate inner cylinder, the drum washing machine of the embodiment comprises an outer cylinder 18, wherein the side wall of the inner cylinder 17 is provided with an inner cylinder drainage hole, a normally closed one-way valve plug 11 is arranged on the inner cylinder drainage hole, and a mandril mechanism 10 for jacking the one-way valve plug 11 to drain water is arranged on the outer cylinder 18.
Preferably, a locking mechanism for locking the rotation of the inner cylinder 17 is further disposed on the outer cylinder 18, and the push rod mechanism 10 pushes the one-way valve plug 11 open for water drainage after the inner cylinder is locked by the locking mechanism.
In order to realize the dehydration of the non-porous inner cylinder, a plurality of dehydration holes are formed in the side wall of the inner cylinder 17, centrifugal valves are installed on the dehydration holes, and the centrifugal valves are opened under the action of dehydration centrifugal force to perform dehydration and drainage.
The present embodiment also provides a control method for the drum washing machine, where the washing machine executes a washing/rinsing procedure, the flow sensor detects a water inflow flow value in real time during a water inflow process, the washing machine calculates a water inflow according to the water inflow flow value and water inflow time, and stops water inflow when the water inflow reaches a set water inflow of the washing machine.
The drum washing machine is provided with a plurality of water inlet flow values for users to select, and the washing machine carries out water inlet according to the water inlet flow values selected by the users.
The drum washing machine has a clothes weighing function, and can determine the flow value of inlet water according to the weight of clothes for water inlet.
Example two
As shown in fig. 2-4, the drum washing machine of the embodiment includes an inner drum 17 and a water inlet pipeline, the inner drum is a non-porous inner drum and is used for containing washing water when washing clothes, and the drum washing machine further includes a water measuring device for measuring the water inlet quantity, the water inlet pipeline is communicated with the water measuring device, and the water measuring device is communicated with the inner drum.
The drum type washing machine of this embodiment carries out the ration volume through setting up water gaging device, carries out the number of times of water gaging device water gaging according to the water level determination that sets for in advance to intaking in 1 of inner tube to solved sclausura inner tube drum type washing machine according to the problem of intaking of setting for the water level, ensured washing effect, simple structure controls the convenience.
Further, the water measuring device of the embodiment comprises a water measuring tank 21, wherein the water measuring tank 21 is provided with a water inlet and a water outlet, the water inlet is communicated with the water inlet pipeline, and the water outlet is communicated with the inner barrel 17; the water outlet is provided with a water outlet control device for controlling the opening of the water outlet when the water quantity in the equivalent water tank 21 reaches a set value.
As an embodiment of this embodiment, as shown in fig. 2, the water measuring tank 21 is disposed at the bottom of the inner tub 17, the water measuring device includes a water level detecting device 22 for detecting the water measuring tank 21, the water outlet control device is a water tank draining pump 23, and the water tank draining pump 23 starts the water tank draining pump 23 to pump the water in the water measuring tank 21 into the inner tub 17 when the water level detecting device 22 detects that the water level in the water measuring tank 21 reaches a set value.
As an embodiment of this embodiment, as shown in fig. 3, the water measuring tank 21 is disposed on the upper portion of the inner cylinder 17, the water measuring device includes a water level detecting device 22 for detecting the water measuring tank, the water outlet control device is a water tank drain valve 25, and the water tank drain valve 25 opens to drain the water in the water measuring tank 21 into the inner cylinder when the water level detecting device 22 detects that the water level in the water measuring tank 21 reaches a set value.
The water level detecting device 22 described in this embodiment is a liquid level sensor, and the liquid level sensor includes an air chamber and a sensor unit, and the air chamber is communicated with the water measuring tank. Alternatively, the water level detecting device 22 includes a plurality of water level detecting probes arranged in the water measuring tank along the depth direction thereof.
As an implementation manner of this embodiment, the water measuring tank 21 is disposed on the upper portion of the inner cylinder 17, the water outlet is disposed on the bottom wall of the water measuring tank 21, the water outlet control device is a tank check valve for keeping the water outlet normally closed, when the amount of water in the water measuring tank reaches a certain value, the tank check valve is opened under the action of water pressure gravity, and after the water in the water measuring tank 21 is discharged into the inner cylinder 17, the tank check valve is reset to keep the water outlet closed.
The water measuring tank 21 described in this embodiment is provided with an overflow hole 24, and the overflow hole 24 is connected to an overflow pipe for guiding out water overflowing from the water measuring tank.
Preferably, the drum washing machine comprises a drain line 8, said overflow line communicating with the drain line 8.
As an embodiment of the present embodiment, as shown in fig. 4, the water measuring device includes a heating device 26 disposed in the water measuring tank 21 and a water temperature detecting device for detecting the temperature of water in the water measuring tank.
The present embodiment also provides a control method of the drum washing machine, where the washing machine executes a washing/rinsing procedure, the washing machine controls washing water to enter the water measuring tank, when the water amount in the water measuring tank reaches a set value, water inflow is stopped, water in the water measuring tank is completely discharged into the inner drum, water inflow is restarted to enter the water measuring tank, and the above-mentioned steps are repeated until the water level in the inner drum reaches the set value, and water inflow is ended.
Furthermore, the washing machine controls the washing water to enter the water measuring tank, when the water amount in the water measuring tank reaches a set value, the water stops entering, the heating device is controlled to operate to heat the washing water, and when the water temperature detection device detects that the water temperature in the water measuring tank reaches the set value, all the water in the water measuring tank is discharged into the inner barrel.
EXAMPLE III
The embodiment mainly solves the problem of how to ensure the unbalanced air pressure of the sealed cabin of the drum washing machine with the non-porous inner barrel, and particularly, the water is cut off by a sudden electromagnetic valve, particularly a tap water pipe network to form negative pressure, and washing water in the sealed cabin is backwashed to the pipe network; or the inside has gas, the problem of difficult water intake.
As shown in fig. 5-7, the drum washing machine of the present embodiment includes an inner drum 17, the inner drum 17 is a non-porous inner drum, and is used for containing washing water when washing clothes, and further includes an air pressure balancing mechanism for communicating the inner drum 17 with the external environment to balance the air pressure inside the inner drum.
When water enters, the gas in the sealed cabin of the inner cylinder is pressurized and can overflow through the balancing mechanism, so that the balance of the air pressure is ensured.
When water is cut off suddenly, external atmosphere can enter the sealed cabin of the inner barrel rapidly, suck back is damaged, air pressure balance is guaranteed, and washing water is prevented from being sucked into a tap water pipe network.
Other air pressure balancing mechanisms can also ensure the air pressure balance of the inner cylinder during dehydration.
As an implementation manner of this embodiment, the air pressure balancing mechanism includes a pressure equalizing hole 27 disposed on the inner barrel 17, and one end of the pressure equalizing hole 27, which is communicated with the inside of the inner barrel 17, is disposed on the inner barrel 17 at a position close to the central rotation axis and is always higher than the highest water level position in the inner barrel 17.
The drum washing machine of the embodiment comprises a driving motor 16 and an inner drum shaft 13, wherein the driving motor 16 is in transmission connection with the inner drum 17 through the inner drum shaft 13 to drive the inner drum 17 to rotate, a pressure equalizing pore passage 27 is formed in the inner drum shaft 13 to communicate the inside of the inner drum 17 with the external environment, and the highest water level in the inner drum 17 is lower than that of the inner drum shaft 13. Thus, the water in the inner cylinder can be prevented from flowing out of the pressure equalizing pore passage.
The drum washing machine of the embodiment comprises an outer drum 18, wherein the inner drum 17 is arranged inside the outer drum 18, water discharged from the inner drum 17 is discharged through the outer drum 18, an inner drum door 6 for sealing the inner drum is arranged at the opening of the inner drum 17, the opening of the outer drum 18 is open, one end of a pressure equalizing channel 27 is communicated with the inside of the inner drum 17, and the other end of the pressure equalizing channel is arranged inside the outer drum 18 and communicated with the inside of the outer drum 18. In this way, the outlet water from the aperture can also be collected within the outer cartridge 18, preventing an extreme situation.
Furthermore, in this embodiment, an inner cylinder drain hole is formed in a side wall of the inner cylinder 17, a normally closed one-way valve plug 11 is installed on the inner cylinder drain hole, and a push rod mechanism 10 for pushing the one-way valve plug 11 open to drain water is installed on the outer cylinder 18.
Preferably, a locking mechanism for locking the rotation of the inner cylinder is further arranged on the outer cylinder 18, and the push rod mechanism pushes the one-way valve plug open for drainage after the locking mechanism locks the inner cylinder.
Further, the drum washing machine of the embodiment comprises a water inlet pipeline, the inner drum shaft 13 is internally provided with a hollow channel 14 communicated with the inside of the inner drum 17, and the water inlet pipeline is communicated with the hollow channel 14 of the inner drum shaft 13; the pressure equalizing pore passage 27 and the hollow channel 14 are respectively communicated with the inside of the inner cylinder 17 and are arranged in a mutually isolated way. Thus, the gas in the sealed cabin of the inner cylinder can be smoothly discharged to keep the air pressure in the inner cylinder balanced, and simultaneously, the water leakage caused by the direct discharge of the inlet water from the pressure equalizing pore passage 27 can be prevented.
Specifically, the hollow channel 27 extends from one end to the other end along the central axis direction of the inner cylinder shaft, the pressure equalizing channel includes a first channel section and a second channel section, the first channel section is arranged in parallel with the hollow channel, one end of the first channel section is communicated with the inside of the inner cylinder, one end of the second channel section is communicated with the first channel section, and the other end of the second channel section extends to the outer peripheral wall of the inner cylinder shaft and is communicated with the inside of the outer cylinder.
Preferably, the second pore channel section and the first pore channel section are vertically arranged to form an L-shaped pressure equalizing pore channel.
Further, the inner cylinder shaft 13 is connected with a driving motor 16, the driving motor 16 comprises a stator and a rotor, and the rotor is fixedly connected with the inner cylinder shaft; the center of the rotor is provided with a through hole, and the water inlet pipeline penetrates through the through hole of the rotor to be communicated with the hollow channel of the inner cylinder shaft.
Preferably, a first dynamic sealing structure is arranged between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is arranged between the through hole of the rotor and the hollow channel of the inner cylinder shaft.
The drum type washing machine of this embodiment, set up a plurality of dehydration holes on the lateral wall of inner tube 17, all install the centrifugal valve on the dehydration hole, the centrifugal valve open under the effect of dehydration centrifugal force and dewater the drainage.
Example four
The embodiment mainly solves the problem of how to ensure the unbalanced air pressure of the sealed cabin of the drum washing machine with the non-porous inner barrel, and particularly, the water is cut off by a sudden electromagnetic valve, particularly a tap water pipe network to form negative pressure, and washing water in the sealed cabin is backwashed to the pipe network; or the inside has gas, the problem of difficult water intake.
As shown in fig. 8-12, the drum washing machine of the present embodiment includes an inner drum 17, the inner drum 17 is a non-porous inner drum, and holds washing water when washing clothes, and further includes a pressurization mechanism and/or a pressure release mechanism for communicating the inner drum with the external environment to balance the air pressure inside the inner drum 17.
The pressurizing mechanism described in this embodiment includes a pressurizing duct 28 and a negative pressure safety valve 29, the negative pressure safety valve 29 is disposed on the pressurizing duct 28, and is used for conducting the pressurizing duct 28 in one way when the internal pressure of the inner cylinder 17 is smaller than the atmospheric pressure of the external environment, the external environment gas enters the inner cylinder 17 from the pressurizing duct 28 to be pressurized until the internal pressure of the inner cylinder 17 is balanced with the atmospheric pressure of the external environment, and the negative pressure safety valve 29 is closed.
The pressure relief mechanism described in this embodiment includes a pressure relief hole 30 and a positive pressure safety valve 31, the pressure relief hole 30 is disposed at a position close to the rotation center axis on the inner cylinder 17 and is always higher than the highest water level position in the inner cylinder 17, the positive pressure safety valve 31 is disposed on the pressure relief hole 30, and is used for conducting the pressure relief hole 30 in one way for pressure relief when the internal pressure of the inner cylinder 17 is greater than the atmospheric pressure of the external environment, until the internal pressure of the inner cylinder 17 is balanced with the atmospheric pressure of the external environment, and the positive pressure safety valve 31 is closed.
As shown in fig. 9, when water enters, the gas in the sealed cabin of the inner cylinder 17 is pressurized, and once the pressure is greater than the set value of the positive pressure safety valve, the positive pressure safety valve is opened, and the gas can overflow through the pressure relief duct, so that the pressure balance is ensured.
As shown in fig. 10, when water is suddenly cut off, the air in the sealed cabin of the inner cylinder 17 is pressurized, once the air is smaller than the set value of the positive pressure safety valve, the external atmosphere can rapidly enter the sealed cabin and destroy the suck-back, so that the air pressure balance is ensured, and the washing water is prevented from being sucked into a tap water pipe network.
Other air pressure balancing mechanisms can also ensure the air pressure balance of the inner cylinder during dehydration.
The drum washing machine of the embodiment comprises a driving motor 16 and an inner drum shaft 13, wherein the driving motor 16 is in transmission connection with the inner drum 17 through the inner drum shaft 13 to drive the inner drum 17 to rotate, a pressurizing pore channel 28 and/or a pressure relief pore channel 30 are formed in the inner drum shaft 13 to communicate the inside of the inner drum 17 with the external environment, and the highest water level in the inner drum 17 is lower than the inner drum shaft 13.
The drum washing machine of the embodiment comprises an outer drum 18, wherein an inner drum 17 is arranged inside the outer drum 18, water discharged from the inner drum 17 is discharged from the outer drum 18, an inner drum door 6 for sealing the inner drum is installed at a drum opening of the inner drum 17, the drum opening of the outer drum 18 is opened, one end of a pressurizing pore passage 28 and/or a pressure relief pore passage 30 is communicated with the inside of the inner drum 17, and the other end of the pressurizing pore passage and/or the pressure relief pore passage 30 is arranged inside the outer drum 18 and communicated with the inside of the outer drum 18.
The drum washing machine of the embodiment comprises a water inlet pipeline, wherein a hollow channel 14 communicated with the interior of an inner drum 17 is arranged in an inner drum shaft 13, and the water inlet pipeline is communicated with the hollow channel 14 of the inner drum shaft 13; the pressure relief duct 30 and the hollow channel 14 are respectively communicated with the interior of the inner cylinder 17 and are arranged in an isolated manner.
As shown in fig. 9 and 10, the hollow channel 14 extends from one end to the other end along the central axis direction of the inner cylinder shaft 13, the pressure relief duct 30 includes a first duct section and a second duct section, the first duct section is arranged in parallel with the hollow channel, one end of the first duct section is communicated with the inside of the inner cylinder, one end of the second duct section is communicated with the first duct section, and the other end of the second duct section extends to the outer peripheral wall of the inner cylinder shaft and is communicated with the inside of the outer cylinder;
preferably, the second duct section and the first duct section are arranged perpendicularly to form an L-shaped pressure relief duct.
The drum washing machine of the embodiment comprises a water inlet pipeline, wherein a hollow channel 14 communicated with the inside of an inner drum 17 is arranged in an inner drum shaft 13, and the water inlet pipeline is communicated with the hollow channel 14 of the inner drum shaft 13; the pressurizing port 28 is in communication with the hollow passage 14.
Further, the hollow passage 14 extends from one end to the other end along the central axis direction of the inner cylinder shaft 13, one end of the pressurizing duct 28 is communicated with the hollow passage 14, and the other end extends to the outer peripheral wall of the inner cylinder shaft 13 and is communicated with the inside of the outer cylinder 18.
Preferably, the pressurizing port 28 and the hollow passage 14 are arranged perpendicular to each other.
The inner cylinder shaft is connected with the driving motor, the driving motor comprises a stator and a rotor, and the rotor is fixedly connected with the inner cylinder shaft; the center of the rotor is provided with a through hole, and the water inlet pipeline penetrates through the through hole of the rotor to be communicated with the hollow channel of the inner cylinder shaft.
Preferably, a first dynamic sealing structure is arranged between the water inlet pipeline and the through hole of the rotor, and a second sealing structure is arranged between the through hole of the rotor and the hollow channel of the inner cylinder shaft.
As shown in fig. 11 and 12, the pressurization duct 28 and the relief duct 30 are both provided on the inner cylinder shaft 13, and the openings for communicating with the atmosphere are both inside the outer cylinder 18; the openings of the sealed cabins communicated with the inner cylinder 17 are all arranged at the inner side of the water inlet channel 14 of the inner cylinder shaft 13.
It is contemplated that the preferred pressurization and depressurization passageways 28, 30 are both disposed on the inner barrel shaft 13 and the vent to atmosphere opening is both inside the outer barrel 18; the openings of the sealed cabins communicated with the inner cylinder 17 are all arranged on the inner side of the sealed cabins.
EXAMPLE five
As shown in fig. 13 to 16, the drum washing machine of the present embodiment includes an inner drum 17, the inner drum 17 is a non-porous inner drum, and holds washing water when washing laundry, and further includes a position detecting device for detecting a position of the inner drum.
The drum washing machine of the embodiment comprises a driving motor 16 and an inner drum shaft 13, wherein the driving motor 16 comprises a stator and a rotor, the rotor is fixedly connected with the inner drum shaft 13 to drive an inner drum 17 to rotate, the position detection device comprises a position sensor 33 and a detected terminal 38, the detected terminal 38 is arranged on the rotor, and the position sensor 33 is fixed at a position corresponding to the detected terminal 38.
The drum washing machine of the embodiment comprises an outer drum 18, the position sensor 33 is arranged on one side of the outer drum 18 close to the driving motor 16, and the position sensor 33 is arranged corresponding to the detected terminal 38.
In an embodiment of the present invention, the position sensor is an electromagnetic position sensor, a photoelectric position sensor, a differential voltage sensor, an eddy current sensor, a capacitive sensor, a reed pipe sensor, or a hall sensor.
The drum washing machine of the embodiment comprises a locking mechanism 35 for locking the rotation of the inner drum, the position detection device is used for detecting whether the inner drum 17 is locked in place after the locking mechanism 35 locks the inner drum 17, and/or when the position detection device detects that the inner drum 17 rotates to a set position, the locking mechanism 35 locks the inner drum 17.
Further, the locking mechanism 35 is mounted on the side wall of the outer cylinder 18 close to the driving motor 16, the locking mechanism 35 includes a locking rod 40 for telescopic movement and a locking motor 41 for driving the locking rod 40 to telescopic movement, a locking groove 39 matched with the locking rod 40 is provided on the rotor of the driving motor 16 corresponding to the locking rod 40, and when the locking rod 40 is driven by the locking motor 41 to extend and insert into the locking groove 39, the inner cylinder 17 is locked.
In the drum washing machine of the embodiment, an inner cylinder drain hole is formed in the side wall of the inner cylinder 17, a normally closed one-way valve plug 11 is installed on the inner cylinder drain hole, and a push rod mechanism 10 for pushing the one-way valve plug open to drain water is installed on the outer cylinder; the locking mechanism 35 locks the inner cylinder 17, and then the push rod mechanism 10 pushes the one-way valve plug 11 open for drainage.
Furthermore, the ejector rod mechanism is arranged on the outer barrel and comprises an ejector rod which moves in a telescopic mode and an ejector rod motor which drives the ejector rod to move in a telescopic mode, and the ejector rod penetrates through the barrel wall of the outer barrel and is inserted into the water discharging hole of the inner barrel to jack the one-way valve plug open for water discharging.
The drum washing machine of the embodiment comprises a main controller, wherein the position detection sensor, the locking motor and the ejector rod motor are electrically connected with the main controller.
The drum type washing machine of this embodiment, set up a plurality of dehydration holes on the lateral wall of inner tube, all install the centrifugal valve on the dehydration hole, the centrifugal valve open under the effect of dehydration centrifugal force and dewater the drainage.
The washing machine of the present embodiment has a position sensor 33 provided on the outer tub 18 and the driving motor 16, specifically, on the rear portion of the outer tub 18 and the rotor frame that the driving motor 16 rotates.
The position sensor 33 senses the position of the detected terminal 38 on the rotating rotor frame, converts the position into a signal, and feeds the signal back to the washing machine main controller 4 through a line 43.
The position of the terminal to be detected 38 on the rotor frame corresponds to the position of the rotating inner cylinder.
The washing machine of the embodiment is provided with a mounting bracket 32, a fixed knot 34 is fixed behind an outer cylinder, and a locking motor, a locking rod and a position sensor are arranged on the mounting bracket 32; the rotor frame of the driving motor has a locking groove and a detected terminal 38.
Example six
As shown in fig. 17 to 18, the drum washing machine of the present embodiment includes an inner drum 17 and an outer drum 18, the inner drum 17 is a non-porous inner drum for containing washing water when washing clothes, the outer drum 18 is coaxially disposed outside the inner drum 17 for collecting water discharged from the inner drum 17 and discharging the water through a drain line, and a position detecting device disposed on the outer drum 18 for detecting the position of the inner drum.
Furthermore, the position detection device comprises a position sensor 37 and a detected terminal 38, the detected terminal 38 is arranged on the inner cylinder 17, and the position sensor 37 is arranged on the inner wall of the outer cylinder 18 and is arranged corresponding to the detected terminal 38 on the inner cylinder 17.
Preferably, the detected terminal 38 is disposed on the sidewall of the inner cylinder 17, the position sensor 37 is disposed on the inner sidewall of the outer cylinder 18, and the circumference of the detected terminal 38 on the inner cylinder 17 is concentric with the circumference of the position sensor 37 on the outer cylinder 18.
Preferably, the position sensor 37 is provided on an inner sidewall of an upper portion of the outer tub 18.
Preferably, the position sensor is an electromagnetic position sensor, a photoelectric position sensor, a differential voltage sensor, an eddy current sensor, a capacitive sensor, a reed pipe sensor, or a hall sensor.
The drum washing machine of the embodiment comprises a locking mechanism 35 for locking the rotation of the inner drum, the position detection device is used for detecting whether the inner drum 17 is locked in place after the locking mechanism 35 locks the inner drum 17, and/or when the position detection device detects that the inner drum 17 rotates to a set position, the locking mechanism 35 locks the inner drum.
Further, the locking mechanism 35 is installed on the outer cylinder 18, the locking mechanism 35 includes a locking rod which moves telescopically and a locking motor which drives the locking rod to move telescopically, a locking groove 39 which is matched with the locking rod is arranged on the inner cylinder 17 corresponding to the locking rod, and when the locking rod is driven by the locking motor to extend and insert into the locking groove 39, the inner cylinder 17 is locked.
As shown in fig. 8, as an embodiment of the present embodiment, a lifting rib 43 is installed at the locking groove 39, so that the locking groove 39 is hidden. Further, the detected terminal 38 is mounted in the lifting rib 43.
As an embodiment of the present embodiment, an inner cylinder drain hole is formed on a side wall of the inner cylinder 17, a normally closed one-way valve plug 11 is mounted on the inner cylinder drain hole, and a push rod mechanism 10 for pushing the one-way valve plug 11 open to drain water is mounted on the outer cylinder 18; the locking mechanism 35 locks the inner cylinder 17, and then the push rod mechanism 10 pushes the one-way valve plug 11 open for drainage.
Further, the ejector rod mechanism 10 is installed on the outer cylinder 18, the ejector rod mechanism 10 comprises an ejector rod which moves in a telescopic manner and an ejector rod motor which drives the ejector rod to move in a telescopic manner, and the ejector rod penetrates through the cylinder wall of the outer cylinder and is inserted into a drain hole of the inner cylinder to jack the one-way valve plug open for draining.
The drum washing machine of the embodiment comprises a main controller 4, wherein the position detection sensor, the locking motor and the ejector rod motor are electrically connected with the main controller.
The drum type washing machine of this embodiment, set up a plurality of dehydration holes on the lateral wall of inner tube, all install the centrifugal valve on the dehydration hole, the centrifugal valve open under the effect of dehydration centrifugal force and dewater the drainage.
EXAMPLE seven
A control method of a drum washing machine, the drum washing machine comprises an inner drum, a position detection device for detecting the position of the inner drum and a locking mechanism for locking the inner drum to rotate, the inner drum is a non-porous inner drum and is used for containing washing water when washing clothes, the control method comprises the following steps:
and when the position detection device detects that the inner cylinder rotates to a set position, the locking mechanism is controlled to lock the inner cylinder, and/or after the locking mechanism locks the inner cylinder, the position detection device detects whether the locking mechanism is in place.
As shown in fig. 19, the washing machine includes a driving motor for driving the inner cylinder to rotate, during the washing or rinsing process, the washing machine controls the driving motor to decelerate and execute the inner cylinder rotation stopping process, when the inner cylinder rotation speed is reduced below the set safe rotation speed, if the position detection device detects that the inner cylinder rotates to the set position, the driving motor is controlled to stop rotating and keep the inner cylinder position still, and the locking mechanism is controlled to lock the inner cylinder for draining.
The washing machine comprises a driving motor for driving the inner barrel to rotate, the washing machine controls the driving motor to decelerate and execute the procedure of stopping the rotation of the inner barrel in the washing or rinsing procedure, when the rotating speed of the inner barrel is reduced to be lower than the set safe rotating speed, the locking mechanism is controlled to lock the inner barrel, if the position detection device detects that the inner barrel rotates to the set position, water is drained, and otherwise, the water is not drained.
In the embodiment, a drain hole of the inner cylinder is formed in the side wall of the inner cylinder, a normally closed one-way valve plug is arranged on the drain hole of the inner cylinder, and a mandril mechanism for jacking the one-way valve plug to drain water is arranged on the outer cylinder; the drainage program comprises: and after the locking mechanism locks the inner barrel, the ejector rod mechanism is controlled to jack the unidirectional valve plug open for drainage.
The washing machine comprises a driving motor for driving an inner barrel to rotate, in a dehydration program, the washing machine controls the driving motor to decelerate and execute an inner barrel rotation stopping program, when the rotating speed of the inner barrel is reduced to be below a set safe rotating speed, if a position detection device detects that the inner barrel rotates to a set position, the driving motor is controlled to stop rotating and keep the position of the inner barrel still, a locking mechanism is controlled to lock the inner barrel, the dehydration program is finished, and a door lock is released.
The washing machine comprises a driving motor for driving the inner barrel to rotate, wherein in the dehydration program, the washing machine controls the driving motor to decelerate and execute the program of stopping the rotation of the inner barrel, when the rotation speed of the inner barrel is reduced to be lower than the set safe rotation speed, the locking mechanism is controlled to lock the inner barrel, the dehydration program is ended, the door lock is released, and if the position detection device does not detect that the inner barrel rotates to the set position, the alarm is given.
The drum washing machine comprises a driving motor and an inner drum shaft, wherein the driving motor comprises a stator and a rotor, the rotor is fixedly connected with the inner drum shaft to drive the inner drum to rotate, the position detection device comprises a position sensor and a detected terminal, the detected terminal is arranged on the rotor, and the position sensor is fixed at a position corresponding to the detected terminal;
when the rotor rotates to the position where the detected end is opposite to the position sensor, the inner cylinder rotates to the set position, and/or after the locking mechanism locks the inner cylinder, the rotor rotates to the position where the detected end is opposite to the position sensor, and the inner cylinder is locked in place.
This embodiment locking mechanism install on the urceolus be close to driving motor's lateral wall, locking mechanism includes telescopic motion's locking pole and driving locking pole telescopic motion's locking motor, correspond the locking pole setting rather than complex locking groove on driving motor's the rotor, when the locking pole stretches out under locking motor's drive and inserts the locking inslot, the inner tube is locked.
The roller washing machine comprises an outer barrel, wherein the outer barrel is coaxially arranged outside the inner barrel and used for collecting water discharged from the inner barrel and discharging the water through a drainage pipeline;
when the rotor rotates to the position where the detected end is opposite to the position sensor, the inner cylinder rotates to the set position, and/or after the locking mechanism locks the inner cylinder, the rotor rotates to the position where the detected end is opposite to the position sensor, and the inner cylinder is locked in place.
This embodiment locking mechanism install on the urceolus, locking mechanism includes telescopic motion's locking pole and the locking motor who drives locking pole telescopic motion, correspond the locking pole setting on the inner tube rather than complex locking groove, when the locking pole stretches out under locking motor's drive and inserts the locking inslot, the inner tube is locked.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.

Claims (10)

1. A drum washing machine comprises an inner drum which is a non-porous inner drum and is used for containing washing water when clothes are washed, and the drum washing machine is characterized by also comprising a position detection device used for detecting the position of the inner drum;
the inner cylinder is communicated with the external environment to balance the air pressure in the inner cylinder, the pressurizing mechanism comprises a pressurizing hole channel and a negative pressure safety valve, and the negative pressure safety valve is arranged on the pressurizing hole channel;
the pressure relief mechanism comprises a pressure relief pore channel and a positive pressure safety valve, the pressure relief pore channel is arranged on the inner cylinder at a position close to the central rotating shaft and is always higher than the highest water level position in the inner cylinder, the positive pressure safety valve is arranged on the pressure relief pore channel, and the pressurizing pore channel and the pressure relief pore channel are both arranged on the inner cylinder shaft;
the pressure relief device is characterized by also comprising a driving motor and an inner cylinder shaft, wherein the driving motor is in transmission connection with the inner cylinder through the inner cylinder shaft, a hollow channel communicated with the inside of the inner cylinder is arranged in the inner cylinder shaft, and the pressure relief pore channel and the hollow channel are respectively communicated with the inside of the inner cylinder and are arranged in an isolated manner;
the pressure relief device is characterized by further comprising an outer barrel, the inner barrel is arranged inside the outer barrel, the hollow channel extends to the other end from one end along the direction of the central axis of the inner barrel shaft, the pressure relief channel comprises a first channel section and a second channel section, the first channel section is arranged in parallel with the hollow channel, one end of the first channel section is communicated with the inside of the inner barrel, one end of the second channel section is communicated with the first channel section, and the other end of the second channel section extends to the outer peripheral wall of the inner barrel shaft to be communicated with the inside of the outer barrel.
2. A drum washing machine according to claim 1, characterized by comprising a driving motor and an inner drum shaft, wherein the driving motor comprises a stator and a rotor, the rotor is fixedly connected with the inner drum shaft to drive the inner drum to rotate, the position detection device comprises a position sensor and a detected terminal, the detected terminal is arranged on the rotor, and the position sensor is fixed at a position corresponding to the detected terminal.
3. A drum washing machine according to claim 2, characterized by comprising an outer drum, wherein the position sensor is arranged on one side of the outer drum close to the driving motor, and the position sensor is arranged corresponding to the interval of the detected terminal.
4. A drum washing machine according to claim 3, characterized in that the position sensor is a photoelectric position sensor, or a differential voltage type sensor, or an eddy current type sensor, or a capacitive type sensor, or a reed pipe type sensor, or a Hall type sensor.
5. A drum washing machine according to any one of claims 1-4, characterized in that the washing machine comprises a locking mechanism for locking the rotation of the inner drum, the position detection device is used for detecting whether the inner drum is locked in place after the locking mechanism locks the inner drum, and/or the locking mechanism locks the inner drum after the position detection device detects that the inner drum rotates to the set position.
6. A drum washing machine according to claim 5, characterized in that the locking mechanism is installed on the side wall of the outer drum near the driving motor, the locking mechanism comprises a locking rod which moves telescopically and a locking motor which drives the locking rod to move telescopically, a locking groove which is matched with the locking rod is arranged on the rotor of the driving motor corresponding to the locking rod, and when the locking rod is driven by the locking motor to extend and be inserted into the locking groove, the inner drum is locked.
7. A drum washing machine as claimed in claim 6, characterized in that the side wall of the inner drum is provided with an inner drum drainage hole, the inner drum drainage hole is provided with a normally closed one-way valve plug, and the outer drum is provided with a push rod mechanism for pushing the one-way valve plug open for drainage; the locking mechanism jacks the one-way valve plug to drain water after the inner cylinder is locked by the locking mechanism.
8. A drum washing machine as claimed in claim 7 wherein, the pin jack mechanism is mounted on the outer drum and includes a pin jack for telescopic movement and a pin jack motor for driving the pin jack to move telescopically, the pin jack penetrates the wall of the outer drum and inserts into the drain hole of the inner drum to jack the one-way valve plug open for drainage.
9. A drum washing machine according to claim 8, characterized by comprising a main controller, wherein the position detection device, the locking motor and the ejector rod motor are electrically connected with the main controller.
10. A drum washing machine according to any one of claims 1-4, characterized in that the side wall of the inner drum is provided with a plurality of dewatering holes, the dewatering holes are all provided with centrifugal valves, and the centrifugal valves are opened under the action of the dewatering centrifugal force to dewater and drain.
CN201811237076.0A 2018-10-23 2018-10-23 Drum washing machine Active CN111172701B (en)

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