JP7293373B2 - drum washing machine - Google Patents

Description

FIELD OF THE INVENTION The present invention belongs to the field of domestic appliances, and in particular to drum washing machines.

A conventional drum washing machine generally includes an inner tub and an outer tub that are fitted together, with the outer tub serving as a water reservoir. Also, the inner tub is used for throwing in clothes, and by rotating the inner tub, the clothes are washed by hitting them. There is a gap between the inner tub and the outer tub, and dirt accumulates when the washing machine is used for a certain period of time. However, since the inner tank and the outer tank are fitted together, the outer wall of the inner tank and the inner wall of the outer tank cannot be washed directly. As a result, bacteria grow inside the washing machine, which affects the user's health. The user has no choice but to remove the inner tank and wash the outer wall of the inner tank and the inner wall of the outer tank.

In order to solve the above problems, if the inner tub of the drum washing machine is designed as a non-perforated inner tub, both water storage and washing can be realized. Moreover, according to the non-perforated washing machine, the problem that dirt accumulates in the gap between the inner tub and the outer tub can be solved, and waste of water resources can be reduced. However, it is rather difficult to supply water to the non-perforated inner tank, and how to realize efficient and reliable water supply is a problem that needs to be solved as soon as possible.

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

A technical problem to be solved by the present invention is to provide a drum washing machine to overcome the defects of the prior art. The object of the drum washing machine is to solve the problem that dirt accumulates between the inner wall of the inner tub and the inner wall of the outer tub and is difficult to clean. Another object is to solve the water supply problem of the drum washing machine.

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

A drum washing machine includes a housing, an inner tub installed inside a housing, a water supply structure installed in the housing for introducing water flow supplied from an external water supply system into the housing of the washing machine, and an inner tub installed in the washing machine. It includes a water supply port through which the inside and outside of the inner tank are communicated with each other, and a water supply channel that guides the water flow introduced by the water supply structure to a discharge port provided across a gap from the water supply port. The water flow discharged from the discharge port is jetted to the water supply port across the gap and conveyed into the inner tank.

Additionally, the water end of the water supply channel communicates with the water supply structure. A water discharge end of the water supply channel penetrates the outer tank wall, and a discharge port is formed on the side of the outer tank wall facing the inner tank. The outlet is installed to be aligned with the water inlet with a gap therebetween.

Further, the water supply channel is equipped with a pressure booster for increasing the pressure of the passing water stream so that the outlet ejects the water stream outward.

Further, the drum washing machine includes an outer tub. The inner tub is fitted inside the outer tub and is rotatable relative to the outer tub. The central axes of the inner and outer tanks extend horizontally. The water inlet is installed at the bottom of the inner tub. At least part of the water supply channel penetrates the bottom wall of the outer tank in a direction parallel to the central axes of the inner and outer tanks, and the outlet of the water supply channel faces the direction of the water supply port.

Further, 0.033≦d/D<0.9, where d is the distance from the center of the water inlet to the center of the bottom of the inner tank, and D is the diameter of the inner tank. Preferably, 0.07≤d/D<0.4, more preferably 0.1≤d/D<0.22.

Furthermore, a positioning mechanism is provided between the inner tank and the outer tank. During the water supply process, the inner tank is stopped at a predetermined position by the action of the positioning mechanism, so that the discharge port of the water supply channel and the water supply port on the wall of the inner tank overlap.

Further, the inner tank is a non-perforated inner tank in which dewatering holes are not formed in the tank wall.

Furthermore, the shape of the ejection port is tapered. Further, the diameter of one end of the discharge port facing the water supply port is smaller than the diameter of the water supply channel so that the pressure of the water flow discharged from the discharge port increases and the diameter of the jetted water column decreases.

Further, the water inlet is a tapered hole. The diameter of the water supply port facing the inside of the inner tank is larger than the diameter of the side facing the discharge port.

Furthermore, the diameter of the side of the discharge port facing the water supply port is smaller than the diameter of the side of the water supply port facing the discharge port.

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

1. The inner tub of the drum washing machine of the present invention is a non-perforated inner tub, and washing is performed by storing washing water in the inner tub during washing. Therefore, the problem that dirt accumulates between the outer wall of the inner tank and the inner wall of the outer tank is solved. In addition, the present invention provides a water supply method for a non-perforated inner tank. As a result, water is conveyed to the inner bath, and cleaning is performed without affecting the rotation of the inner bath.

2. In the present invention, the water supply channel is installed at the bottom of the outer tank. The water supply channel guides the water flow introduced by the water supply structure to a discharge port provided in the outer tank and facing the water supply port of the inner tank. The water flow discharged from the discharge port passes through the gap between the inner tank and the outer tank, is jetted to the water supply port, and is conveyed into the inner tank. Therefore, there is no need to add a separate pipeline for water supply, which saves installation space.

3. A pressure booster is installed in the water supply channel. As a result, the water pressure in the water supply channel is increased, and the water in the water supply channel can be jetted into the inner tank through the water supply port at a constant speed. Moreover, since it is also possible to wash away the clothes in the inner tub, the washing ratio of the clothes is improved.

The technical problem to be solved by the present invention is to further provide a drum washing machine in order to overcome the defects of the prior art. The object of the drum washing machine is to solve the problem that dirt accumulates between the inner wall of the inner tub and the inner wall of the outer tub and is difficult to clean. Another object is to solve the water supply problem of the drum washing machine.

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

The drum washing machine includes a housing having a decorative door on the front panel, an outer tub, and an outer tub. An inner tub equipped with a sealed door for opening and closing the inlet, a water supply structure provided in the housing for introducing water flow supplied from an external water supply system into the housing of the washing machine, and an inner tub provided in the sealed door. It includes a water supply port that communicates the inside and outside of the tank, and a water supply channel that guides the water flow introduced by the water supply structure to a discharge port that is provided on the decorative door and is installed facing the water supply port of the inner tank. The water flow discharged from the discharge port passes through the gap between the closed door and the decorative door, is jetted to the water supply port, and is conveyed into the inner tank.

Further, the water supply end of the water supply channel extends to the water supply structure. At least part of the water supply channel extends inside the decorative door, and a discharge port is formed on the side of the decorative door facing the inner tank. The direction of the outlet is perpendicular to the extending direction of the water supply channel inside the decorative door. The outlet is placed in spaced alignment with the water inlet on the closed door. Preferably, the water supply channel extends longitudinally within the decorative door. The outlet is located at the lowest position of the water supply channel so that the water pressure at the outlet is increased.

Furthermore, the water supply channel is equipped with a pressure increasing device for increasing the pressure of the passing water flow so that the discharge port causes the water flow to pass through the gap in the form of a jet and inject it into the water supply port.

Furthermore, the sealing door is provided with a circular area having a diameter d and centered at the center of the sealing door. The water inlet is installed within a circular area. Assuming that the diameter of the inner tank is D, the ratio of the diameter d of the water supply region to the diameter D of the inner tank is 0.5 or less.

Furthermore, a positioning mechanism is provided between the inner tank and the outer tank. During the water supply process, the inner tub is stopped at a predetermined position by the action of the positioning mechanism, so that the water supply port on the sealing door and the discharge port of the water supply channel overlap.

Furthermore, the discharge port is installed at the center position of the decorative door, and the water supply port is installed at the center position of the sealing door.

Furthermore, the shape of the ejection port is tapered. Further, the diameter of one end of the discharge port facing the water supply port is smaller than the diameter of the water supply channel so that the pressure of the water flow discharged from the discharge port increases and the diameter of the jetted water column decreases.

Furthermore, the diameter of the water supply port facing the inside of the inner tank is larger than the diameter of the side facing the discharge port.

Furthermore, the diameter of the side of the discharge port facing the water supply port is smaller than the diameter of the side of the water supply port facing the discharge port.

Further, the inner tank is a non-perforated inner tank in which dewatering holes are not formed in the tank wall.

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

1. The inner tub of the drum washing machine of the present invention is a non-perforated inner tub, and washing is performed by storing washing water in the inner tub during washing. Therefore, the problem that dirt accumulates between the outer wall of the inner tank and the inner wall of the outer tank is solved. In addition, the present invention provides a water supply method for a non-perforated inner tank. This realizes transport of water into the inner tank without affecting the cleaning of the inner tank.

2. In the present invention, the water supply channel guides the water flow introduced by the water supply structure to the discharge port provided in the decorative door and facing the water supply port of the inner tank. The water flow discharged from the discharge port passes through the gap between the closed door and the decorative door, is jetted to the water supply port, and is conveyed into the inner tank. As a result, water can be transported into the inner tank, and the inner tank can be sealed. In addition, the installation space for the water supply device can be saved.

3. A pressure booster is installed in the water supply channel, and it is possible to increase the water pressure passing through the water supply channel. As a result, the water in the water supply channel flows into the water supply opening across the gap between the closed door and the decorative door. In addition, since the pressurized water stream can wash away the clothes in the inner tank, the washing ratio of the clothes is improved.

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 drum washing machine according to an embodiment of the present invention. FIG. 2 is a schematic diagram of the structure of a drum washing machine in another embodiment of the present invention. FIG. 3 is an enlarged view of part A in FIG. FIG. 4 is a schematic diagram of the structure of the inner tank bottom in an embodiment of the present invention. FIG. 5 is a structural schematic diagram of a drum washing machine according to another embodiment of the present invention. FIG. 6 is a schematic diagram of the structure of a drum washing machine in another embodiment of the present invention. FIG. 7 is a front view of the inner tank in the example of the present invention.

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. It is.

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. 1 to 4, the drum washing machine described in the embodiment of the present invention includes a housing 1 and an inner tub 3 installed inside the housing 1. As shown in FIG. A water supply structure is provided in the housing 1 for introducing water from an external water supply system into the housing 1 of the washing machine. The water supply structure includes a water supply valve 51, a flow sensor 52, and a detergent case 53, which are serially connected, and a detergent case 53 into which cleaning products are introduced. The drum washing machine also includes a water inlet 31 installed on the wall of the inner tub 3 . The water supply port 31 communicates the inside and the outside of the inner tank 3 . A water supply channel 6 is provided between the water supply structure and the water supply port 31 . The water supply channel 6 guides the water flow introduced by the water supply structure to the water supply port 31 and the discharge port 60 installed with a gap therebetween. The water flow discharged from the discharge port 60 is jetted to the water supply port 31 across the gap and conveyed into the inner tank 3 . The drum washing machine of this embodiment may be provided with the outer tub 2 or may not be provided with the outer tub 2 .

In an embodiment of the present invention, the drum washing machine includes an outer tub 2 . The inner tub 3 is fitted inside the outer tub 2 and is rotatable relative to the outer tub 2 . The inner tank 3 and the outer tank 2 are coaxial, and the central axis is horizontally installed. Between the inner tub 3 and the outer tub 2 is mounted a driving device 4 for rotating the inner tub 3 around the outer tub 2 . Further, the outer wall of the inner tank 3 and the inner wall of the outer tank 2 are separated by a certain distance. The inner tank 3 of this embodiment is a non-perforated inner tank 3 in which dewatering holes are not formed in the tank wall. During washing, washing water is stored in the inner tub 3, and the driving device 4 rotates the inner tub 3 to wash the clothes. A water supply port 31 is provided in the inner tank. The water supply channel 6 guides the water flow introduced by the water supply structure to a discharge port 60 provided in the outer tank 2 and facing the water supply port 31 of the inner tank 3 . The water flow discharged from the discharge port 60 passes through the gap between the inner tank and the outer tank 2, is jetted to the water supply port 31, and is conveyed into the inner tank 3.

In an embodiment of the present invention, the water end of the water supply channel 6 communicates with the water supply structure for introducing water from an external system into the water supply channel 6 via the water supply structure. A water discharge end of the water supply flow path 6 penetrates the wall of the outer tank 2 , and a discharge port 60 is formed on the side of the wall of the outer tank 2 facing the inner tank 3 . The discharge port 60 is installed corresponding to the water supply port 31 on the wall of the inner tank 3 . Since the inner tank and the outer tank 2 are separated by a certain gap, a certain gap also exists between the discharge port 60 and the water supply port 31 . When the discharge port 60 jets a water stream, the jetted water stream crosses the gap, is jetted to the water supply port 31 , and is conveyed into the inner tank 3 . In order to increase the pressure of the water flow passing through the water supply flow path 6, the water flow at the outlet 60 is jetted out. Further, as shown in FIG. 2, by additionally adding a pressure booster 61 to the water supply channel 6, waste of water resources caused by water flowing out of the gap can be reduced. By making the gap between the inner tank and the bottom of the outer tank 2 as small as possible when designing, the pressurized water flow can pass over the gap. Also, the bottom of the inner tank 3 is provided with a vent hole having a small diameter. This is convenient for jetting the water stream into the inner tub 3 . The vent hole is higher than the water supply port 31 when the inner tank 3 is stationary. In addition, since the diameter of the vent hole is small, only a small amount of washing water in the inner tub 3 flows out during the rotation washing process of the inner tub 3 . Further, the outer tank 2 is provided with a drain port, and water flowing between the outer tank 2 and the inner tank 3 is discharged from the drain port.

In the embodiment of the present invention, a positioning mechanism (not shown) is provided between the inner tub 3 and the outer tub 2 . The inner tub 3 is stopped at a predetermined position by the action of the positioning mechanism, so that the discharge port 60 of the water supply channel 6 and the water supply port 31 on the wall of the inner tub 3 overlap. In addition, the inner tub 3 does not rotate with respect to the outer tub 2 during the water supply process.

The discharge port 60 described in the embodiment of the present invention is installed so as to face the water supply port 31 . The water supply port 31 and the discharge port 60 are two tapered ports facing each other. The diameter of one end of the discharge port 60 facing the water supply port 31 is smaller than the diameter of the water supply channel 6 . This not only increases the pressure of the water flow discharged from the discharge port 60, but also reduces the diameter of the water column that is discharged. The diameter of the water supply port 31 on the side facing the inside of the inner tank 3 is larger than the diameter on the side facing the discharge port 60 . As a result, the water flow at the water supply port 31 portion flows into the inner tank 3 along the tapered surface. In addition, the outflow of water from the inner tank 3 through the water supply port 31 is reduced during the rotary washing of the inner tank 3 . In addition, since the diameter of the side of the discharge port 60 facing the water supply port 31 is smaller than the diameter of the side of the water supply port 31 facing the discharge port 60, the water jetted from the discharge port 60 is completely inside the water supply port 31. enter the

As shown in FIGS. 1 to 4, the water supply port 31 described in the embodiments of the present invention is installed at the bottom of the inner tank 3. As shown in FIG. At least part of the water supply channel 6 penetrates the bottom wall of the outer tank 2 in a direction parallel to the central axes of the inner tank and the outer tank 2 . Also, the discharge port 60 of the water supply channel 6 faces the direction of the water supply port 31 .

In the embodiment of the present invention, as shown in FIG. 4, when the distance from the water inlet 31 to the center of the bottom of the inner tub 3 is d, d can be determined based on the diameter of the inner tub 3 . Assuming that the diameter of the inner tank 3 is D, 0.033≦d/D<0.9. Preferably, 0.07≤d/D<0.4, more preferably 0.1≤d/D<0.22. By doing so, it is possible to ensure that the water in the inner tank 3 does not leak from the water supply port 31 during the cleaning process.

As shown in FIG. 1, the water supply structure described in the embodiment of the present invention includes a water supply valve 51, a flow sensor 52 and a detergent case 53, which are serially connected in sequence. The water supply structure communicates with the water supply channel 6 . The water supply structure introduces water flow from an external water supply system into the water supply channel 6 . A water stream is jetted into the inner tank 3 from a discharge port 60 located at the end of the water supply channel 6 .

In this embodiment, the water supply structure is provided with a flow rate sensor 52 for detecting the amount of water entering the inner tub 3 of the drum washing machine. When the amount of water flowing into the inner tub 3 reaches a predetermined value, the water supply valve 51 is closed to stop the water supply, and the washing machine starts washing. The flow rate sensor 52 is installed downstream of the water supply valve 51 . Preferably, the flow sensor 52 is a rotor flow sensor 52, a turbine flow sensor 52, an ultrasonic flow sensor 52, an electromagnetic flow sensor 52, an orifice flow sensor 52, or the like.

In this embodiment, the detergent case 53 can contain liquid detergent, powder detergent, softener, and the like. After entering the detergent case 53 and dissolving the liquid detergent, the powder detergent, or the softener, the water flow is conveyed into the water supply channel 6 .

In this embodiment, the water supply structure is further provided with a heating device (not shown) capable of sufficiently dissolving the detergent or the like. The heating device can be installed at any position. For example, the heating device may be installed downstream of the detergent case 53, and the water supply valve 51, the flow sensor 52, the detergent case 53, and the heating device may be sequentially connected in series from the water supply end of the water supply structure to the water discharge end of the water supply structure. . Alternatively, the heating device is installed between the flow sensor 52 and the detergent case 53, and the water supply valve 51, the flow sensor 52, the heating device and the detergent case 53 are sequentially connected in series from the water supply end of the water supply structure to the water discharge end of the water supply structure. You may

As shown in FIGS. 1 and 2, a plurality of lifting ribs 32 are evenly spaced on the inner wall of the inner tank 3 in the embodiment of the present invention. A casing of the lifting rib 32 is provided with a plurality of water passage holes. An opening is provided at a position facing the lifting rib 32 on the inner wall of the inner tank 3, and a centrifugal control valve 33 is provided at the opening. A drain port is provided at the lowest position of the outer tub 2 . The centrifugal control valve 33 is opened to drain water when the inner tank 3 rotates at high speed.

In this embodiment, centrifugal control valve 33 has two positions. The centrifugal control valve 33 is switchable between a first position and a second position according to the rotation speed of the inner tub 3 . When the inner tub 3 rotates at a low speed, the centrifugal control valve 33 is in the first position to seal the opening. Further, when the inner tub 3 rotates at high speed, the centrifugal control valve 33 is positioned at the second position to open the opening, thereby realizing the discharge of water from the inner tub 3 .

In this embodiment, the centrifugal control valve includes a valve plug, a lever and a weight, with the valve plug sealing the opening accordingly. A weight and a valve plug are installed on each side of the lever. A valve plug seals the opening when the inner tub 3 is stationary or rotating at low speed. On the other hand, when the inner tank 3 rotates at a high speed, the weight moves outward in the radial direction of the inner tank 3 under the action of centrifugal force, and as a result, the valve plug moves away from the opening to open the opening.

As shown in FIGS. 5 to 7, the drum washing machine described in the embodiment of the present invention includes a housing 1 and an inner tub 3 installed inside the housing 1. As shown in FIG. The housing 1 is provided with a water supply structure for introducing the water flow in the external water supply system into the interior of the washing machine. The inner tub 3 is provided with an inlet for the user to put in clothes. In addition, a sealing door 310 for opening and closing the inlet is fixedly attached to the inner tub 3 . The sealing door 310 is provided with a water supply port 300 for supplying water to the inside of the inner tank 3, and a water supply channel 6 is provided between the water supply port 300 and the water supply structure. The water discharge end of the water supply channel 6 extends to the water supply structure. A discharge port is formed at the water discharge end of the water supply structure, and the discharge port is installed to face the water supply port 300 with a certain gap therebetween. The water supply flow path 6 guides the water flow introduced by the water supply structure to the water supply port 300 and the discharge port installed with a gap therebetween. The water flow discharged from the discharge port is jetted to the water supply port 300 across the gap and conveyed into the inner tank 3 . The inner tank 3 is a non-perforated inner tank 3 in which dewatering holes are not formed in the tank wall. The drum washing machine may be provided with the outer tub 2 and may be provided with a driving device 4 between the outer tub 2 and the inner tub 3 for rotating the inner tub 3, or the outer tub 2 may be omitted. good too. Also, the outer tank 2 may be designed integrally with the housing 1 to increase the water storage volume of the inner tank 3 .

In the embodiment of the present invention, a decorative door 10 is installed in front of the housing 1 so as to face the sealing door 310 . At least part of the water supply channel 6 extends inside the decorative door 10, and a discharge port is formed on the side of the decorative door 10 facing the inner tank 3. - 特許庁The water supply channel 6 guides the water flow introduced by the water supply structure to a discharge port provided in the decorative door 10 and facing the water supply port 300 of the inner tank 3 . The water flow discharged from the discharge port passes through the gap between the closed door 310 and the decorative door 10, is jetted to the water supply port 300, and is conveyed into the inner tank 3. In addition, a rear wall or sealing door 310 perpendicular to the axis of the inner tank 3 is provided with a small-diameter vent hole. This is convenient for jetting the water stream into the inner tub 3 . In addition, since the diameter of the ventilation hole is small, the washing water in the inner tank 3 hardly flows out through the ventilation hole during the rotation washing process of the inner tank 3 .

The decorative door 10 has a plate-like structure, and the water supply channel 6 extends along the plane inside the decorative door 10 . The discharge port penetrates the decorative door 10 and opens toward the inner tank 3 . The direction of the discharge port is perpendicular to the extending direction of the water supply channel 6 inside the decorative door 10 . Preferably, the water supply channel 6 extends longitudinally within the decorative door 10 . The outlet is located at the lowest position of the water supply channel 6 so that the water pressure at the outlet is increased. The water supply channel 6 is further equipped with a pressure booster 61 for increasing the pressure of the water flow passing therethrough. As a result, the discharge port causes the water flow to pass through the gap in the form of a jet, and jets it to the water supply port 300 . The water jetted from the discharge port passes through the water supply port 300 and enters the inner tub 3, and also has the effect of washing away the clothes inside the inner tub 3, thereby improving the washing ratio.

In an embodiment of the present invention, the closure door 310 is provided with a circular area having a diameter d and centered at the center of the closure door 310 . The water inlet 300 is installed within a circular area. Assuming that the diameter of the inner tank 3 is D, the ratio between the diameter d of the water supply region and the diameter D of the inner tank 3 is 0.5 or less. A positioning mechanism (not shown) is provided between the inner tank 3 and the housing 1 . During the water supply process, the inner tub 3 is stopped at a predetermined position by the action of the positioning mechanism. As a result, the water supply port 300 on the closed door 310 overlaps with the discharge port of the water supply channel 6 .

In the embodiment of the present invention, the discharge port is installed at the center position of the decorative door 10 and the water supply port 300 is installed at the center position of the closed door 310 . This design eliminates the need to design a positioning mechanism, thus providing a larger washing space for the inner tub 3 . In addition, during the water supply process, the inner tub 3 may stop rotating, or may rotate at a constant speed. When water is supplied while the inner tub 3 rotates, the clothes can be sufficiently moistened, and the time required for washing the clothes can be shortened.

The discharge port described in the embodiment of the present invention is installed to face the water supply port 300 . The water inlet 300 and the outlet are two tapered openings facing each other. The diameter of one end of the outlet facing the water supply port 300 is smaller than the diameter of the water supply channel 6 . This not only increases the pressure of the water flow discharged from the discharge port, but also reduces the diameter of the jetted water column. The diameter of the water supply port 300 on the side facing the inside of the inner tank 3 is larger than the diameter on the side facing the discharge port. As a result, the water flow at the water supply port 300 portion flows into the inner tank 3 along the tapered surface. In addition, the outflow of water from the inner tub 3 through the water supply port 300 is reduced when the inner tub 3 is rotated and washed. In addition, since the diameter of the discharge port facing the water supply port 300 is smaller than the diameter of the water supply port 300 facing the discharge port, the water jetted from the discharge port completely enters the water supply port 300. . Therefore, the possibility that the water discharged from the discharge port flows into the outer tank 2 or the housing 1 through the gap and wastes water resources is reduced.

This embodiment differs from the above embodiment in the following points. That is, a connection pipe is provided between the outlet and the water supply port 300 . The axis of the connection pipe is installed coaxially with the water supply port 300 and the discharge port. One end of the connection pipe is fixed to the outer periphery of the outlet or water supply port 300, and the other end is connected to the water supply port 300 or the outlet in a relatively rotatable and sealed manner. During water supply, the water in the water supply channel 6 enters the inner tank 3 via the connecting pipe.

In this embodiment, the connection pipe is fixed to the outer circumference of the water supply port 300 . Also, the other end of the connection pipe is connected to the outer circumference of the discharge port in a relatively rotatable and sealed manner. As a result, the water flowing out from the discharge port enters the inner tank 3 via the connection pipe and the water supply port 300 . Alternatively, the connecting pipe is fixed to the outer periphery of the discharge port, and the other end of the connecting pipe is connected to the outer periphery of the water supply port 300 in a relatively rotatable and sealed manner. As a result, the water flowing out from the discharge port enters the inner tank 3 via the connection pipe and the water supply port 300 .

As shown in FIG. 5, the water supply structure described in the embodiment of the present invention includes a water supply valve 51, a flow sensor 52 and a detergent case 53 which are serially connected in sequence. The water supply structure communicates with the water supply channel 6 . The water supply structure introduces water flow from an external water supply system into the water supply channel 6 . A water stream is jetted into the inner tank 3 from a discharge port positioned at the end of the water supply channel 6 .

In this embodiment, the water supply structure is provided with a flow rate sensor 52 for detecting the amount of water entering the inner tub 3 of the drum washing machine. When the amount of water flowing into the inner tub 3 reaches a predetermined value, the water supply valve 51 is closed to stop the water supply, and the washing machine starts washing. The flow rate sensor 52 is installed downstream of the water supply valve 51 . Preferably, the flow sensor 52 is a rotor flow sensor 52, a turbine flow sensor 52, an ultrasonic flow sensor 52, an electromagnetic flow sensor 52, an orifice flow sensor 52, or the like.

In this embodiment, the detergent case 53 can contain liquid detergent, powder detergent, softener, and the like. After entering the detergent case 53 and dissolving the liquid detergent, the powder detergent, or the softener, the water flow is conveyed into the water supply channel 6 .

In this embodiment, the water supply structure is further provided with a heating device (not shown) capable of sufficiently dissolving the detergent or the like. The heating device can be installed at any position. For example, the heating device may be installed downstream of the detergent case 53, and the water supply valve 51, the flow sensor 52, the detergent case 53, and the heating device may be sequentially connected in series from the water supply end of the water supply structure to the water discharge end of the water supply structure. . Alternatively, the heating device is installed between the flow sensor 52 and the detergent case 53, and the water supply valve 51, the flow sensor 52, the heating device and the detergent case 53 are sequentially connected in series from the water supply end of the water supply structure to the water discharge end of the water supply structure. You may

As shown in FIGS. 5 and 6, a plurality of lifting ribs 32 are evenly spaced on the inner wall of the inner tank 3 in the embodiment of the present invention. A casing of the lifting rib 32 is provided with a plurality of water passage holes. An opening is provided at a position facing the lifting rib 32 on the inner wall of the inner tank 3, and a centrifugal control valve 33 is provided at the opening. The outer tub 2 or the housing 1 is provided with a drain port. The centrifugal control valve 33 is opened to drain water when the inner tank 3 rotates at high speed.

In this embodiment, centrifugal control valve 33 has two positions. The centrifugal control valve 33 is switchable between a first position and a second position according to the rotation speed of the inner tub 3 . When the inner tub 3 rotates at a low speed, the centrifugal control valve 33 is in the first position to seal the opening. Further, when the inner tub 3 rotates at high speed, the centrifugal control valve 33 is positioned at the second position to open the opening, thereby realizing the discharge of water from the inner tub 3 .

In this embodiment, the centrifugal control valve includes a valve plug, a lever and a weight, with the valve plug sealing the opening accordingly. A weight and a valve plug are installed on each side of the lever. A valve plug seals the opening when the inner tub 3 is stationary or rotating at low speed. On the other hand, when the inner tank 3 rotates at a high speed, the weight moves outward in the radial direction of the inner tank 3 under the action of centrifugal force, and as a result, the valve plug moves away from the opening to open the opening.

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.

REFERENCE SIGNS LIST 1 housing 2 outer tank 3 inner tank 10 decorative door 31 water supply port 32 lifting rib 33 centrifugal control valve 4 drive device 51 water supply valve 52 flow rate sensor 53 detergent case 6 water supply channel 60 discharge port 61 pressure booster 300 water supply port 310 sealed door

Claims (10)

A housing having a front panel provided with a decorative door, an inner tank mounted inside the housing and having a closed door for opening and closing a loading port for the user to load clothes, and a housing provided with a a water supply structure for introducing water flow supplied from an external water supply system into the housing of the washing machine,
A water supply port is provided on the sealed door to communicate the inside and outside of the inner tank,
The water supply channel guides the water flow introduced by the water supply structure to the discharge port provided in the decorative door and facing the water supply port of the inner tank, and the water flow discharged from the discharge port flows through the sealed door. A drum washing machine characterized in that water is jetted to a water supply port across a gap with a decorative door and conveyed into an inner tub. The water supply end of the water supply channel extends to the water supply structure, at least a part of the water supply channel extends inside the decorative door, and a discharge port is formed on the side of the decorative door facing the inner tank. The direction of the discharge port is perpendicular to the extending direction of the water supply channel inside the decorative door, and the discharge port is installed so as to be aligned with the water supply port on the closed door with a gap. A drum washing machine according to claim 1 . A pressure increasing device for increasing the pressure of the passing water flow is attached to the water supply channel so that the discharge port causes the water flow to pass through the gap in the form of a jet and is jetted to the water supply port . The drum washing machine described in . The closed door is provided with a circular area having a diameter of d and centered at the center of the closed door. 4. The drum washing machine according to claim 1 , wherein the ratio of the diameter d of the water supply area to the diameter D of the inner tub is 0.5 or less. A positioning mechanism is provided between the inner tank and the housing. During the water supply process, the inner tank stops at a predetermined position due to the action of the positioning mechanism. 5. The drum washing machine according to claim 4 , wherein the drums overlap. 5. The drum washing machine according to claim 4 , wherein the discharge port is installed at the center position of the decorative door, and the water supply port is installed at the center position of the sealing door. The discharge port has a tapered shape, and the diameter of one end of the discharge port facing the water supply port is tapered so that the pressure of the water flow discharged from the discharge port increases and the diameter of the jetted water column decreases. 7. The drum washing machine according to any one of claims 1 to 6 , wherein the diameter is smaller than the diameter of the channel. The drum washing machine according to any one of claims 1 to 7 , wherein the diameter of the water supply port facing the inside of the inner tub is larger than the diameter of the side facing the discharge port. The drum washing machine according to any one of claims 1 to 8 , wherein the diameter of the discharge port facing the water supply port is smaller than the diameter of the water supply port facing the discharge port. The drum washing machine according to any one of claims 1 to 9 , wherein the inner tub is a non-perforated inner tub having no dewatering holes formed in the tub wall.

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