JP7293367B2 - washing machine - Google Patents

Description

The present invention belongs to the field of washing appliances, and in particular to washing machines.

A conventional pulsator-type washing machine, as shown in FIG. 1, generally includes a pulsator 1', an inner tub 2', an outer tub 3', and a housing 4', which are sequentially installed from the inside to the outside. The pulsator 1' is installed in the center of the bottom of the inner tank 2' and is rotatable by a driving device 5'. A balance ring 6' is installed on the upper part of the inner tank 2'. In addition, a plurality of rows of dewatering holes 21' are provided in the vertical direction on the side wall of the inner tank 2'. A drain hole 22' is installed in the bottom of the inner tub 2', and the drain hole 22' is also used to insert the output shaft 51' of the driving device 5'. As shown in FIG. 2, a gas chamber 31' and a water level sensor (not shown) are provided at the bottom of the side wall of the outer tub 3'. In addition, an overflow port 32' is provided at the top and a drain port 7' is provided at the bottom. The gas chamber 31' and water level sensor are used to detect the water level in the outer tank 3', and the overflow port 32' is used to drain excess water when the water level sensor fails.

When the washing machine starts operating, the drain valve 8' is closed and water is supplied to the inner tub 2'. When filling the inner tub 2', the water flow also fills the entire outer tub 3' through the dewatering holes 21' on the side wall of the inner tub 2'. That is, water is filled between the bottom of the outer tub 3' and the bottom of the inner tub 2' and between the sidewalls of the outer tub 3' and the sidewalls of the inner tub 2'. Then, the gas chamber 31' and the water level sensor detect the water level in the tub, and when the water in the tub reaches a predetermined water level, the water supply is stopped and the washing machine starts washing. Specifically, the driving device 5' reciprocally rotates the pulsator 1', so that the water and clothes in the inner tub 2' roll along with the rotation of the pulsator 1'. As a result, the clothes rub against each other, and the rolling clothes repeatedly rub against the pulsator and the side wall of the inner tank, thereby achieving the purpose of washing. After washing is completed, the washing machine must drain the water stream in the tub and then dewater the clothes. Specifically, when draining water, the drain valve 8' is opened, and the water flow between the outer tank 3' and the inner tank 2' flows through the drain port 7' at the bottom of the outer tank 3', the drain valve 8', and the drain pipe 9'. are discharged to the outside of the housing 4' in order. In addition, the water in the inner bath 2' is discharged from the dehydration hole 21' to maintain the same liquid level as the outer bath 3'. Ultimately, the water in the inner tank 2' flows downward, flows into the outer tank 3' through the drain hole 22' at the bottom of the inner tank 2', and then flows through the drain port 7' at the bottom of the outer tank 3'. discharged from At the time of dehydration, the driving device 5' rotates the inner tub 2' at high speed, so that centrifugal force causes the moisture in the clothes to flow out of the dehydration hole 21' in the side wall of the inner tub 2' and the drain hole 22' in the bottom of the outer tub. After being discharged to 3', it is discharged to the outside of the washing machine through a drain port 7' and a drain pipe 9' (see FIG. 1).

In the conventional pulsator type washing machine, the water filled between the inner tub and the outer tub wall does not participate in washing, and only the water in the inner tub substantially participates in washing. As a result, the waste of water resources increases. Also, excessive water between the inner and outer tubs reduces the concentration of detergent/powder in the wash liquor.

In addition, since water flows frequently between the inner and outer tubs, dirt and grime accumulate in the area between the side walls of the inner and outer tubs with continued use. That is, limescale in tap water, loose matter from powdered detergent, cellulose in clothes, organic matter in the human body, and dust and bacteria brought in by clothes very easily stay between the side walls of the inner tank and the outer tank. These molds are propagated by ineffective removal of large amounts of dirt accumulated inside washing machines that have been used for a long time. If such stains that are not visible to the user are not removed, the bacteria will adhere to the clothes after the next washing and will be introduced to the human body, leading to the problem of cross-infection due to washing.

In order to realize a water-saving function during washing, many manufacturers have proposed a holeless inner tub washing machine by improving the above washing machine. The perforated inner tub washing machine adopts a closed water storage design for the entire inner tub, and dewatering holes are provided around the tub wall only below the balance ring. There are no open holes for dehydration in the lower part of the inner tank wall, and all the water for washing and rinsing is collected in the inner tank. As a result, the inner tank serves as both a water storage washing tank and a centrifugal dehydration tank. In addition, the outer tub of the water-saving washing machine is merely a path for collecting the water thrown out by the non-perforated inner tub during dehydration. In addition, the washing machine is classified into two types according to the drainage method, one is a structure in which a drain port is provided at the bottom of the inner tub, and the other is a structure in which the bottom of the tub is completely sealed. In the case of a water-saving washing machine having a drain on the bottom of the tub, the drain on the bottom of the inner tub is closed during washing. Also, when draining water, the drain port is opened, and most of the water is first discharged from the inner tank through the drain port. During centrifugal dehydration, the inner tank rotates at high speed, and the centrifugal force causes water remaining in the clothes to move upward along the tank wall of the non-perforated inner tank. Then, the water is swung into the outer tank through the dehydration hole in the upper part of the tank wall, and is collected in the drain pipe at the bottom of the outer tank along the outer tank wall and discharged to the outside. On the other hand, in the case of a water-saving washing machine in which the bottom of the tub is completely sealed, by controlling the rotation speed of the inner tub, the water in the inner tub is discharged from the dewatering holes provided around the top of the tub wall. Dehydration is the same as the above method. In this washing machine, the amount of water in the "intermediate layer" between the inner tub and the outer tub in conventional washing machines is reduced, so the water saving effect can reach an average of 50% or more.

US Pat. No. 5,300,000 discloses a non-porous inner tub water saving washing machine that includes a control base, a housing, a non-perforated cleaning inner tub, a pulsator, a water reservoir, a drive system and a control system. A control base is attached to the housing, and a control system is attached to the control base. In addition, a water tank is suspended within the housing. A non-perforated cleaning inner tank is installed in the water storage tank, and a pulsator is installed in the non-perforated cleaning inner tank. Also, the driving system is connected to the non-porous cleaning inner tank and the pulsator. The non-porous cleaning inner tank has no water discharge hole in the tank body, but has a water discharge hole in the upper part. In addition, a centrifugal drainage structure is provided at the bottom.

In the case of the above water-saving washing machine, since the supplied water directly enters the inner tub, it is not possible to detect the water level in the outer tub of the washing machine as in the conventional case. Therefore, modifications have been made so that the amount of water supplied is detected by a flow valve to control the water level in the inner tank, or the change in weight is detected by a weight sensor to calculate the amount of water supplied. However, the technology that detects the flow rate of the supplied water using a flow valve or the technology that detects the supplied water using a weight sensor alone cannot be used in special situations. is already accumulated and the flow valve cannot detect the water supply as usual and the water overflows, or the flow valve loses its function and the water supply does not stop, or when washing, the washing water in the inner tank vortexes and large waves are formed by the intense reciprocating agitation of the pulsator, and part of the wash water scatters into the outer tub from the dehydration holes below the balance ring due to the action of the large waves, causing a "water shortage" in the washing machine. , it interferes with the cleaning effect.

In view of the above, the present invention is proposed.

Chinese Patent Application No. 201120200858.4

A technical problem to be solved by the present invention is to provide a washing machine that accurately detects the liquid level in a rotating tub capable of storing water, in order to eliminate the defects of the prior art.

In order to solve the above technical problems, the basic idea of the technical solution adopted in the present invention is as follows.

The washing machine includes a housing and a wash tub rotatably mounted within the housing of the washing machine as a water reservoir. The washing tank has a first chamber for loading and washing laundry, and communicates with the first chamber at least at the bottom, thereby maintaining the same liquid level in the two chambers and the first chamber. A second room isolated from the laundry in the room. The washing machine is further provided with a liquid level detection device that detects the liquid level in the second chamber.

Preferably, the liquid level detection device is a non-contact liquid level measurement device.

As a further measure, the peripheral wall of the washing tank is provided with a communicating device extending from the bottom to the top. In addition, a water passage opening communicating with the communicating device is provided in the lower part of the washing tank. The space inside the washing tank constitutes a first room, and the space inside the communicating device forms a second room.

Or, as a further alternative, the inner peripheral wall of the washing tank is provided with a connecting device extending from bottom to top to divide the inner space of the washing tank into two chambers. The space inside the communication device forms a second room, and the space outside the communication device forms a first room. At the bottom of the communication device, a water passage is provided for connecting the two rooms.

As a further measure, the upper part of the communicating device is provided with a vent for communicating with the outside air. The horizontal height at which the vent is located is higher than the predetermined maximum water level of the cleaning tank, and the horizontal height at which the water passage is located is less than or equal to the predetermined minimum water level in the cleaning tank. .

Preferably, the vent on the top of the communication device constitutes a spout for spouting water outward under the action of centrifugal force during rotation of the washing tank.

More preferably, the upper part of the peripheral wall of the cleaning tank is provided with a spout for spouting water outside under the action of centrifugal force during rotation of the cleaning tank. The height of the spout is higher than the predetermined maximum water level of the washing tank.

A further method further includes an outer tank positioned outside the washing tank, and during dehydration and/or drainage, the water in the communication device is subjected to the action of centrifugal force when the washing tank rotates and flows out of the vent through the outer tank. It is swung inward and discharged.

Preferably, the vent is located below the outer tub lid.

As a further measure, the outer peripheral wall of the washing tank and the outside of the communication device are respectively provided with drainage channels for conducting water from top to bottom. The upper part of the drainage path communicates with the spout, and the lower end of the drainage path discharges water into the outer tank. At least part of the outer tub is provided below the cleaning tub. The upper edge of the side peripheral wall of the outer tank extends upward and is higher than the part where the spout is located at the lower end of the drainage path.

Preferably, the upper edge of the outer tub does not extend beyond the top opening of the cleaning tub.

More preferably, the upper edge of the outer bath does not exceed half of the washing bath.

As a further solution, the liquid level detection device is mounted on the control panel base of the washing machine above the second compartment or on the outer tub lid of the washing machine, or on the bottom of the outer tub of the washing machine below the second compartment. It includes an ultrasonic liquid level gauge that is mounted, mounted on a drive unit mounting member below the bottom of the outer tub of the washing machine, or mounted on the housing.

Alternatively, the liquid level detection device is a non-contact liquid level measurement device, including a radar level meter or a laser level meter. An opening is provided in the ceiling of the second room. The liquid level sensing device is mounted directly above the opening in the ceiling of the second compartment, preferably under the control panel base of the washing machine or under the outer tub lid of the washing machine.

Alternatively, a further alternative further includes a pulsator mounted inside the cleaning bath. The pulsator is coaxial with the washing tank. At the center of the pulsator, a communicating device extending from bottom to top is provided to divide the inner space of the washing tank into two chambers. The space inside the communication device forms a second room, and the space outside the communication device forms a first room. At the bottom of the communication device, a water passage is provided for connecting the two rooms.

Preferably, the outer wall of the communicating device forms the stirring structure of the pulsator.

Furthermore, the ceiling of the communicating device is sealed and vents are provided in the upper sidewalls. The liquid level detection device is a non-contact type liquid level measurement device, and is mounted on the lower surface of the upper cover of the washing machine.

Preferably, the liquid level detection device is positioned directly above the communication device when the top cover is closed.

By using the above technical solutions, the present invention has the following beneficial effects compared with the prior art.

The washing machine described in the present invention is mainly intended for liquid level detection of washing machines with "inner tubs without holes". to remotely measure the liquid level. The room for detecting the liquid level and the room for washing the laundry in the washing tank are separated so that the laundry in the washing tank does not affect the detection. is accurate. In addition, the technical scheme is mature, reliable and inexpensive. Therefore, it is possible to meet user needs and effectively improve customer satisfaction.

In addition, the washing machine described in the present invention can be applied not only to a water-saving washing machine with "anhydrous between tubs", but also to a capacity-increased washing machine with a relatively increased washing capacity. It has a wide range of applications and saves R&D and production costs.

Specific embodiments of the present invention will be described in more detail below in combination with the drawings.

The drawings are part of the invention and are used for a further understanding of the invention. Also, the schematic embodiments of the invention and their descriptions are used for the interpretation of the invention, but do not unduly limit the invention. It should be understood that the drawings described below are only part of the examples, and those skilled in the art can derive further drawings from these drawings without creative effort.

FIG. 1 is a schematic diagram of the structure of a washing machine in the prior art. FIG. 2 is a schematic diagram of an outer tub structure of a washing machine in the prior art. FIG. 3 is a schematic diagram of a structure in which the liquid level detection device according to the present invention is mounted on the upper surface of the outer tank lid. FIG. 4 is a schematic diagram of a structure in which the liquid level detection device according to the present invention is attached to the bottom of the outer tank. FIG. 5 is a schematic diagram of a structure in which the liquid level detection device according to the present invention is attached to the lower surface of the outer tank lid. FIG. 6 is a schematic diagram of the structure of the drainage system of the washing machine according to the present invention. FIG. 7 is a schematic diagram of a structure in which the communication device according to the present invention is mounted at the center of the pulsator.

It should be noted that these drawings and written description are not intended to limit the scope of the inventive concept in any way, but rather to explain the inventive concepts to those skilled in the art with reference to specific embodiments. belongs to.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments will be described clearly and concisely in combination with the drawings of the embodiments of the present invention. It should be noted that the following examples are for the purpose of explaining the present invention, and do not limit the scope of the present invention.

In the description of the present invention, terms such as "top", "bottom", "front", "back", "left", "right", "vertical", "inside", "outside", etc. should be explained. The direction or positional relationship indicated by is the direction or positional relationship based on the illustration, and is only for the convenience and simplification of the description of the present invention, and the target device or member is in a specific direction. It does not express or imply that it has and must be configured and operated in a particular direction. As such, it should not be construed as limiting the invention.

In the description of the present invention, the terms "attached", "connected", and "connected" should be interpreted broadly, unless explicitly defined and limited otherwise. For example, it may be a fixed connection, a removable connection, or an integral connection. Also, the connection may be mechanical or electrical. Furthermore, it may be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can interpret the specific meanings of the above terms in the present invention according to specific situations.

As shown in FIGS. 3-7, the washing machine described in the present invention includes a housing 1 and a washing tub 2 rotatably mounted within the housing 1. As shown in FIGS. The washing tank 2 is a water tank. A balance ring 3 is provided in the upper portion of the cleaning tank 2, and an outer tank 4 is provided outside the cleaning tank 2 for collecting water discharged from the cleaning tank. The outer tub 4 is connected to the housing 1 via a damping unit and used to support the cleaning tub 2 . The damping unit can use a suspension rod suspension type damping structure and/or a bottom damping support structure. In the illustration, a suspension rod suspension type damping structure is used. The washing tank 2 has a first chamber 21 and a second chamber 22 . The first room 21 is used for loading and washing laundry. The second compartment 22 communicates with the first compartment 21 at least at the bottom to maintain the same liquid level in the two compartments and is isolated from the laundry in the first compartment 21 . The washing machine is further provided with a liquid level detector 5 for detecting the liquid level in the second chamber 22, and by detecting the liquid level in the second chamber 22, the washing tank Get the water level data of

Preferably, the liquid level detection device 5 is a non-contact liquid level measurement device and includes at least one of an ultrasonic liquid level measurement device 51, a radar liquid level measurement device 52 and a laser liquid level measurement device 53. .

At the top of the peripheral wall of the washing tank 2 described in the present invention, there is provided a water spout 20 for spouting water outside under the action of centrifugal force during rotation of the washing tank. The height of the spout is higher than the predetermined maximum water level of the washing tank. During dehydration and/or drainage, the water in the cleaning tank 2 is discharged into the outer tank 4 from the spout 20 by the action of centrifugal force when the cleaning tank rotates, and then the drainage structure at the bottom of the outer tank 4. 6 is discharged. The balance ring 3 and the cleaning tank 2 are installed in a hermetically sealed manner so that the water is not spouted from the mounting gap between the balance ring 3 and the cleaning tank 2.例文帳に追加Various conventional hermetic mounting structures can be used in this area.

Furthermore, as shown in FIG. 6, the outer peripheral wall of the cleaning tank 2 is provided with a drainage path 7 for conducting water from top to bottom. The drainage path 7 communicates with the spout 20 at its upper portion, and drains water into the outer tub 4 from its lower end. At least part of the outer tub 4 is provided below the cleaning tub 2 . The upper edge of the side peripheral wall of the outer tank 4 extends upward and is higher than the part where the water discharge port is located at the lower end of the drainage path 7 . Preferably, the upper edge of the outer tub 4 does not extend beyond the top opening of the cleaning tub 2 . More preferably, the upper edge of the outer tub 4 does not exceed half of the washing tub 2 .

As shown in FIGS. 3 and 4, the washing machine described in this embodiment is provided with a communication device 8 extending from the bottom to the top on the outer peripheral wall of the washing tub 2 . A water passage port 81 that communicates with the communication device 8 is provided in the lower portion of the cleaning tank 2 . The space inside the cleaning tank 2 forms a first room 21 , and the space inside the communication device 8 forms a second room 22 . Preferably, the communication device 8 may have a tubular structure, and the lid is placed over the outer wall of the washing tank 2 and combined with the outer wall of the washing tank 2, so that the lid and the outer wall of the washing tank are connected. A second room 22 may be formed in the .

A vent hole 82 communicating with the outside air is provided in the upper part of the communication device 8 . The horizontal height at which the vent hole 82 is positioned is higher than the predetermined highest water level of the cleaning tank 2 , and the horizontal height at which the water passage port 81 is positioned is higher than the predetermined lowest water level in the cleaning tank 2 . less than or equal to

This embodiment differs from the first embodiment in the following points. That is, a communicating device (not shown) extending from bottom to top is provided on the inner peripheral wall of the cleaning tank to divide the inner space of the cleaning tank into two chambers. The space inside the communication device forms a second room, and the space outside the communication device forms a first room. At the bottom of the communication device, a water passage is provided for connecting the two rooms.

Based on the above-described embodiment, the vent port 82 in the upper portion of the communication device 8 constitutes a spout for spouting water outward under the action of centrifugal force during rotation of the washing tank.

The vent 82 is provided in the ceiling of the communication device 8 and positioned below the outer tank lid 41 . At the time of draining water, the water is directly shaken out from the vent hole 82 by the communication device 8 and is blocked by the outer tank lid 41 and falls into the outer tank 4 (see FIGS. 3 to 5).

Alternatively, the vent 82 is provided in the side wall of the communicating device 8 . Preferably, a side wall of the communication device 8 is further provided with a drainage channel 7 for conducting water from top to bottom. The drainage path 7 communicates with the vent 82 at its upper portion, and drains water from its lower end into the outer tank 4 (see FIG. 6).

The liquid level detection device 5 described in this embodiment may be attached to the control panel base of the washing machine above the second compartment 22 or the outer tub lid 41 of the washing machine (see FIGS. 3 and 5), It may be mounted on the bottom of the outer tub of the washing machine below the second compartment 22 (see FIG. 4), mounted on a drive unit mounting member below the bottom of the outer tub of the washing machine (not shown), or below the second compartment. includes an ultrasonic liquid level gauge 51 (not shown) mounted in the housing of the .

Ultrasonic waves emitted from the ultrasonic liquid level measuring device 51 are not blocked by washing machine structures such as the outer tub lid 41 and the outer tub bottom wall. Therefore, the ventilation port 82 of the communication device 8 of this embodiment may be provided not only on the ceiling of the communication device 8 but also on the side wall of the communication device 8 .

The ultrasonic liquid level meter described in this example has a power cord for electrical supply and is connected to the washing machine controller for feeding back the liquid level signal in the second chamber. It has a signal line.

As shown in FIG. 3, the ultrasonic liquid level measuring device 51 is mounted on the upper surface of the outer tank lid 41 above the second chamber 22, and the ultrasonic pulses emitted from the emission end are emitted from the air and the outer tank lid 41. pass through. Alternatively, as shown in FIG. 5 , the ultrasonic liquid level measuring device 51 is fixed to the lower surface of the outer tank lid 41 . In this case, the emitted ultrasonic pulse need not penetrate the outer vessel lid. Alternatively, the ultrasonic liquid level gauge 51 may be fixed to the control panel base (not shown). In this case, the ultrasonic pulse penetrates the outer tank lid and enters directly into the second chamber 22 through the opening 82 in the ceiling of the communicating device 8 . Alternatively, the ultrasonic pulses enter the second room 22 through the ceiling wall of the communicating device 8 . The ultrasonic pulse is then reflected by the liquid surface and returns to the receiving end of the ultrasonic liquid level gauge 8 on the reverse path. The ultrasonic liquid level measuring device 8 measures the time required for the ultrasonic pulse to reciprocate, and calculates the distance to the liquid level based on the speed of sound in the medium, thereby specifying the height of the liquid level.

Alternatively, as shown in FIG. 4, the ultrasonic liquid level measuring device 51 is attached to the bottom of the outer tank or any position. An ultrasonic pulse emitted from the emitting end can effectively penetrate the bottom wall of the outer tank. Also, when the ultrasonic liquid level measuring device 51 is fixed inside the outer tank, the ultrasonic pulse does not need to penetrate the bottom wall of the outer tank. The ultrasonic pulse propagates to the liquid surface in the liquid to be measured in the second chamber 22 , is reflected by the liquid surface, passes through the liquid medium and the bottom wall of the outer tank, and reaches the ultrasonic liquid level measuring device 51 . Return to the receiving end. The ultrasonic liquid level measuring device 51 measures the time required for the ultrasonic pulse to reciprocate, and calculates the distance to the liquid level based on the speed of sound in the medium, thereby specifying the height of the liquid level.

Needless to say, methods such as echo detection may be used to further improve measurement accuracy and eliminate the effects of errors due to differences in media.

As shown in FIG. 5 , the liquid level detection device 5 described in this embodiment includes a radar liquid level measuring device 52 or a laser liquid level measuring device 53 . An opening 82 as a vent is provided in the ceiling of the second room 22 . The liquid level detection device 5 is mounted directly above the opening 82 in the ceiling of the second compartment 22, preferably under the control panel base of the washing machine or under the outer tub lid 41 of the washing machine. .

The laser liquid level measuring device 53 has a power cord for supplying electricity and a signal line for connecting to a control device and feeding back a liquid level signal.

A laser beam emitted from the emitting end of the laser liquid level measuring device 53 penetrates the air and is reflected by the liquid surface to the receiving end of the laser liquid level measuring device 53 . The laser liquid level measuring device 53 measures the time required for the laser to reciprocate, and calculates the distance to the liquid level based on the speed of light in the medium, thereby specifying the height of the liquid level.

In the case of the radar liquid level measuring device 52 , the emitted radar penetrates the air, is reflected by the liquid surface to the radar liquid level measuring device 52 , and is received by the radar liquid level measuring device 52 . The radar liquid level measuring device 52 measures the time required for the radar to make a round trip, and calculates the distance to the liquid level based on the radio wave propagation speed of the medium, thereby specifying the height of the liquid level.

As shown in FIG. 7, unlike the above embodiments, the washing machine described in this embodiment further includes a pulsator 9 mounted inside the washing tub 2 . The pulsator 9 is coaxial with the cleaning tank 2 . At the center of the pulsator 9, a communicating device 8 extending from bottom to top is provided to divide the inner space of the cleaning tank 2 into two chambers. The space inside the communication device 8 forms a second room 22 , and the space outside the communication device 8 forms a first room 21 . A water passage port 81 is provided at the bottom of the communication device 8 to communicate the two chambers. Preferably, the outer wall of communication device 8 forms the stirring structure of the pulsator.

Furthermore, the ceiling of the communicating device 8 is sealed, and a vent hole 82 is provided in the upper side wall. The liquid level detection device 5 is an ultrasonic liquid level measuring device 51 and is mounted on the lower surface of the upper cover 10 of the washing machine.

Preferably, the liquid level detection device 5 is positioned directly above the communication device 8 when the upper cover 10 is closed.

The foregoing are merely preferred embodiments of the invention and are not intended to limit the invention in any form. Although the present invention has been disclosed above through preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, slight variations or supplements that can be implemented by those skilled in the art using the technical content presented above are regarded as equally modified equivalent embodiments, and any It does not deviate from the content of the technical plan. In addition, any simple modifications, equivalent variations and supplements added to the above embodiments based on the technical essence of the present invention are all within the scope of the scheme of the present invention.

Claims (9)

A washing machine comprising a housing and a wash tub rotatably disposed within the housing of the washing machine as a water reservoir,
The cleaning tank is
a first room for loading and washing laundry;
a second chamber communicating with the first chamber at least at the bottom to maintain the same liquid level in the two chambers and isolated from the laundry in the first chamber;
The washing machine is further provided with a liquid level detection device that detects the liquid level in the second room ,
Further, it includes a pulsator mounted inside the cleaning tank, the pulsator is coaxial with the cleaning tank, and a communicating device extending upward from the bottom is provided at the center of the pulsator to divide the inner space of the cleaning tank into two chambers. The space inside the communication device constitutes the second room, the space outside the communication device constitutes the first room, and the lower part of the communication device consists of two rooms A washing machine characterized in that a water passage port communicating with the is provided . A communication device extending from the bottom to the top is provided on the outer peripheral wall of the cleaning tank, and a water communication port communicating with the communication device is provided at the bottom of the cleaning tank. The washing machine according to claim 1, wherein the space inside the communication device constitutes a first chamber, and the space inside the communication device constitutes a second chamber. The inner peripheral wall of the washing tank is provided with a communication device extending from the bottom to the top, dividing the inner space of the washing tank into two chambers, the inner space of the communication device dividing the second chamber. A space outside the communication device constitutes a first room, and a water passage opening connecting the two rooms is provided in a lower part of the communication device. Item 1. The washing machine according to item 1. A vent communicating with the outside air is provided in the upper part of the communication device, and the horizontal height at which the vent is located is higher than a predetermined height of the maximum water level of the washing tank, and the water vent is equal to or lower than the predetermined minimum water level of the washing tank ,
The vent at the top of the communication device constitutes a spout for spouting water outward under the action of centrifugal force generated when the washing tank rotates ,
At the top of the peripheral wall of the washing tank, a spout is provided for spouting out water under the action of centrifugal force when the washing tank rotates, and the height of the spout is predetermined. 4. The washing machine according to claim 2, wherein the water level is higher than the maximum water level of said washing tub. Further, an outer tank positioned outside the washing tank is included, and water in the communication device is subjected to centrifugal force during rotation of the washing tank and flows into the outer tank through the vent during dehydration and/or drainage. shaken out and discharged ,
5. The washing machine according to claim 4, wherein the vent is located below the outer tub cover. A drainage path is provided on the outer peripheral wall of the cleaning tank and on the outside of the communication device, respectively, to guide water from top to bottom. At least a part of the outer tank is provided below the washing tank, and the upper edge of the side peripheral wall of the outer tank extends upward from the part where the spout at the lower end of the drainage path is located. 5. A washing machine according to claim 4, characterized in that the height is also raised . The liquid level detection device is mounted on the control panel base of the washing machine or the outer tub lid of the washing machine above the second compartment, or mounted on the bottom of the outer tub of the washing machine below the second compartment, 2. The washing machine according to claim 1, further comprising an ultrasonic liquid level measuring device mounted on a driving unit mounting member below the bottom of the outer tub of the washing machine or mounted on the housing. The liquid level detection device is a non-contact liquid level measurement device and includes a radar liquid level measurement device or a laser liquid level measurement device, and an opening is provided in the ceiling of the second room, 2. The washing machine according to claim 1, wherein the liquid level detection device is mounted directly above the opening in the ceiling of the second room. The ceiling of the communication device is sealed, the upper side wall is provided with a vent, the liquid level detection device is a non-contact liquid level measurement device, and the lower surface of the upper cover of the washing machine. 2. The washing machine according to claim 1 , wherein the liquid level detection device is positioned right above the communication device when the upper cover is closed.

Images