CN220597913U - Washing machine - Google Patents

Abstract

The application discloses a washing machine, include: a case; the cylinder body is arranged in the box body, and a water outlet is formed in the bottom of the cylinder body; the first end of the drain pipe is connected with the water outlet, the second end of the drain pipe extends out of the box body and is used for discharging waste water in the cylinder body out of the box body, and the second end of the drain pipe is higher than the water outlet; the drainage pump is arranged on the drainage pipe and used for pumping waste water in the drainage pipe out of the box body; the water storage container is internally provided with a water storage cavity, the water storage cavity is communicated with the drain pipe through a connecting pipe, the surface of the water storage container is provided with a plurality of air holes communicated with the water storage cavity and the outside, and the aperture of each air hole is between 1 mu m and 100 mu m, so that waste water entering the water storage cavity is oozed and volatilized through the air holes. The washing machine can solve the problem that the waste water generated by washing cannot be completely discharged from the drain pipe, so that mildewing and stinking are generated.

Description

Washing machine

Technical Field

The application relates to the field of household appliances, in particular to a washing machine.

Background

With the gradual increase of the living standard, a washing machine, which is a cleaning machine for washing laundry using an electric power generation mechanical action, has become an indispensable home appliance in people's daily life.

At present, most of washing machines adopt an upper drainage mode, the outlet end of a drain pipe of the washing machine is higher, after the waste water generated by washing is discharged by a drainage pump, part of the waste water flows back to the drain pipe and cannot be completely discharged by the drainage pump, and bacteria can grow to mould and become smelly after a long time, so that adverse effects are brought.

Disclosure of Invention

The application provides a washing machine, can solve the waste water that the washing produced and can't discharge from the drain pipe completely thereby produce the problem of moldy and stink.

A washing machine, comprising: a case; the cylinder body is arranged in the box body, and a water outlet is formed in the bottom of the cylinder body; the first end of the drain pipe is connected with the water outlet, the second end of the drain pipe extends out of the box body and is used for discharging waste water in the cylinder body out of the box body, and the second end of the drain pipe is higher than the water outlet; the drainage pump is arranged on the drainage pipe and used for pumping waste water in the drainage pipe out of the box body; the water storage container is arranged on the box body and is positioned at the lower side of the drain pipe, a water storage cavity is arranged in the water storage container, the water storage cavity is communicated with the drain pipe through a connecting pipe, a plurality of air holes which are communicated with the water storage cavity and the outside are formed in the surface of the water storage container, and the aperture of each air hole is between 1 mu m and 100 mu m, so that waste water entering the water storage cavity seeps out through the air holes and volatilizes.

In an exemplary embodiment of the present application, the tank side wall is provided with a mounting opening, and the water storage container is mounted on the mounting opening and protrudes outwards from the tank side wall, so that the air hole is communicated with the outside of the tank.

In an exemplary embodiment of the present application, the water storage container includes a box body with an open side and a cover plate with an open side, the cover plate is clamped on the mounting opening, the water storage cavity is formed in the box body, the connecting pipe is communicated with the water storage cavity through the cover plate, and the box body is detachably connected with the cover plate.

In an exemplary embodiment of the application, the edge of the cover plate extends to the outer side of the box body to form a ring protrusion, and one end of the box body where the opening is located is clamped in the ring protrusion.

In an exemplary embodiment of the present application, a sealing member is further clamped between the annular protrusion and the case.

In an exemplary embodiment of the present application, the apron middle part extends to be formed with the butt joint portion in the box, the butt joint portion inside be formed with the cavity passageway of water storage chamber intercommunication, the butt joint portion sealed peg graft in the connecting pipe, waste water in the drain pipe is in proper order warp connecting pipe and cavity passageway get into the water storage intracavity.

In one exemplary embodiment of the present application, the cartridge is a ceramic matrix and the air holes are distributed throughout the surfaces of the cartridge.

In an exemplary embodiment of the present application, still be equipped with the filter that is used for filtering waste water on the drain pipe, the drain pipe includes first section, second section and third section, first section intercommunication the outlet reaches the import of filter, the second section intercommunication the export of filter reaches the import of drainage pump, the third section intercommunication the export of drainage pump reaches the box is outside.

In an exemplary embodiment of the present application, a filter cavity is disposed inside the filter, a filter screen is horizontally disposed in the filter cavity, and an inlet and an outlet of the filter are respectively located on upper and lower sides of the filter screen.

In an exemplary embodiment of the present application, the connection pipe includes a fourth section and a fifth section, a first end of the fourth section is communicated with the bottom of the filter, the fourth section extends in a vertical direction, a second end of the fourth section is communicated with a first end of the fifth section, a second end of the fifth section is communicated with the water storage chamber, the fifth section extends along a straight line, and a second end of the fifth section is not higher than the first end.

The beneficial effects are that:

in this application, through setting up the water storage container, wait the drain pump stop work after, the waste water of temporary storage drain pipe backward flow to set up a plurality of intercommunication water storage chamber and external gas pocket on the surface of water storage container, through setting for the aperture of gas pocket, make the waste water that gets into in the water storage chamber can not spill over from this tiny gas pocket and cause the phenomenon of leaking, but the waste water that gets into in the water storage chamber that can make oozes and volatilize through the gas pocket. Therefore, compared with the existing mode of directly evaporating water through a narrow pipe orifice of the drain pipe, the evaporation efficiency can be remarkably increased, the waste water in the water storage cavity can be fully evaporated before the next washing, residual waste water is finally prevented from being left in the drain pipe and stored for a long time, bacteria are bred to mould and smell, and the user experience is improved.

Drawings

FIG. 1 illustrates a schematic diagram of a washing machine drain process in accordance with some embodiments;

FIG. 2 illustrates a second schematic diagram of a washing machine drain process according to some embodiments;

FIG. 3 shows a partial enlarged view at A in FIG. 2;

FIG. 4 shows a partial enlarged view at B in FIG. 2;

fig. 5 illustrates a third schematic diagram of a washing machine drain process according to some embodiments.

Reference numerals illustrate:

the water draining device comprises a box body 1, a cylinder body 2, an outer cylinder 21, an inner cylinder 22, a draining outlet 23, a door body 3, a draining pipe 4, a first section 41, a second section 42, a third section 43, a draining pump 44, a filter 45, a filter screen 46, a water storage container 5, a box body 51, a cover plate 52, a water storage cavity 53, an annular protrusion 54, a sealing member 55, a butt joint part 56, an elastic clamping hook 57, a connecting pipe 6, a fourth section 61, a fifth section 62 and a draining pipe 7.

Detailed Description

For purposes of clarity and implementation of the present application, the following description will make clear and complete descriptions of exemplary implementations of the present application with reference to the accompanying drawings in which exemplary implementations of the present application are illustrated, it being apparent that the exemplary implementations described are only some, but not all, of the examples of the present application.

It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms "first," second, "" third and the like in the description and in the claims and in the above drawings are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.

The terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

At present, most of washing machines adopt an upper drainage mode, the outlet end of a drain pipe of the washing machine is higher, after the waste water generated by washing is discharged by a drainage pump, part of the waste water flows back to the drain pipe and cannot be completely discharged by the drainage pump, and bacteria can grow to mould and become smelly after a long time, so that adverse effects are brought. To solve this problem, the present application particularly proposes a washing machine.

For ease of understanding, the direction of the washing machine facing the user is taken as the front direction, and the direction of the washing machine facing away from the user is taken as the rear direction.

Fig. 1 illustrates a schematic diagram of a washing machine drainage process according to some embodiments. Fig. 2 illustrates a second schematic diagram of a washing machine drainage process according to some embodiments. Fig. 3 shows a partial enlarged view at a in fig. 2.

Referring to fig. 1 to 3, a washing machine includes a cabinet 1, a tub 2, a drain pipe 4, a drain pump 44, and a water storage container 5.

The box body 1 is an external integral structure of the washing machine, the box body 1 is of a hollow structure, is in a rectangular column shape as a whole, has an inner space, and can be provided with other component structures of the washing machine, such as a circuit structure, an air duct structure, a driving mechanism, a drainage structure and the like.

In some embodiments, the drum 2 is disposed in the inner space of the case 1 for washing laundry, the drum 2 has a washing chamber with a front opening, and laundry is put into the washing chamber through a laundry putting opening formed in the drum 2 for washing. The axis of the cylinder body 2 extends along the front-back direction, the box body 1 is provided with a door body 3, the door body 3 is arranged corresponding to the clothes putting opening and is used for sealing the clothes putting opening of the cylinder body 2 when clothes are washed, so that a washing cavity is a sealed space when the clothes are washed, and door glass can be arranged on the door body 3 to facilitate observation of the washing progress. The bottom of the cylinder 2 is provided with a water outlet 23, and waste water generated by washing is discharged outwards through the water outlet 23.

The drum 2 may include an outer drum 21 and an inner drum 22, the inner drum 22 is hollow to form a washing cavity, the inner drum 22 is disposed in an inner cavity of the outer drum 21, the outer drum 21 is disposed in the case 1, and the door 3 covers a laundry inlet of the inner drum 22 to enable the washing cavity to form a closed space. And the peripheral wall of the inner cylinder 22 is provided with an opening, the inner cylinder 22 is communicated with the inner cavity of the outer cylinder 21 through the opening, the inner cylinder 22 can discharge washing wastewater to the outer cylinder 21 through the opening, and the water outlet 23 is specifically arranged at the bottom of the outer cylinder 21.

In some embodiments, the drain pipe 4 has opposite first and second ends, the first end of the drain pipe 4 is connected to the drain opening 23, the second end of the drain pipe 4 extends outside the tank 1 for draining waste water in the bowl 2 out of the tank 1, and the second end of the drain pipe 4 is higher than the drain opening 23, forming an upper drain way, and the installation location is more free. In order to be able to drain the waste water, a drain pump 44 is provided on the drain pipe 4 for pumping the waste water in the drain pipe 4 out of the tank 1. It is understood that the outside of the washing machine may be further provided with a drain pipe 7, the second end of the drain pipe 4 is connected to the drain pipe 7, and waste water generated by washing directly enters the drain pipe 7 through the drain pipe 4.

In some embodiments, the drain pipe 4 is further provided with a filter 45 for filtering waste water, and impurities such as lint may remain after washing clothes, and the impurities may be filtered out by providing the filter 45 so as not to enter the drain pump 44 or block the drain pipe 4.

The drain pipe 4 comprises a first section 41, a second section 42 and a third section 43, wherein the first section 41 is communicated with the water outlet 23 and the inlet of the filter 45, the second section 42 is communicated with the outlet of the filter 45 and the inlet of the drain pump 44, the third section 43 is communicated with the outlet of the drain pump 44 and the outside of the box body 1, waste water enters the filter 45 through the first section 41 for filtration, enters the drain pump 44 through the second section 42 after filtration, is pumped to the outside of the box body 1 by the drain pump 44 for discharge, and after a period of time, the filter 45 is taken down to clean impurities. It will be appreciated that the filter 45 is disposed below the barrel 2 and near the front side of the box 1, so that the filter 45 is removed for cleaning at a later stage, the drain pump 44 is disposed at the bottom of the barrel 2, the second section 42 extends in a horizontal direction, the third section 43 includes a horizontal section and a vertical section, the horizontal section is connected with the drain pump 44 and extends out of the box 1 to connect with the vertical section, the vertical section is disposed at the back side of the box 1 and extends upward, so that the second end of the drain pipe 4 is higher than the drain outlet 23, an upper drain is formed, and the horizontal sections of the second section 42 and the third section 43 are on the same horizontal plane for saving installation space.

In some embodiments, a filter cavity is disposed inside the filter 45, a filter screen 46 is horizontally disposed in the filter cavity, the filter screen 46 divides the filter 45 into an upper portion and a lower portion, and impurities remain on the upper side of the filter screen 46 after being filtered, so that an inlet and an outlet of the filter 45 are respectively located on the upper side and the lower side of the filter screen 46.

After the washing is completed, the waste water generated by the cylinder 2 is discharged out of the box 1 through the water outlet 23, the water outlet 4 and the water discharge pump 44, and the second end of the water discharge pipe 4 is higher than the water outlet 23 by adopting an upper water discharge mode, so that after the water discharge pump 44 stops working, the waste water in the water discharge pipe 4 can remain in the waste water, and bacteria can grow for a long time to generate bad smell.

Fig. 4 shows a partial enlarged view at B in fig. 2.

Therefore, referring to fig. 4, in the present embodiment, the water storage container 5 is disposed on the case 1 and located at the lower side of the drain pipe 4, the water storage cavity 53 is disposed inside the water storage container 5, the water storage cavity 53 is communicated with the drain pipe 4 through the connecting pipe 6, and the waste water in the drain pipe 4 can be introduced into the water storage cavity 53 through the connecting pipe 6 for temporary storage. The surface of the water storage container 5 is provided with a plurality of air holes communicated with the water storage cavity 53 and the outside, the aperture of the air holes is between 1 mu m and 100 mu m, and by setting the aperture of the air holes between the air holes, the waste water entering the water storage cavity 53 can not overflow from the tiny air holes to cause water leakage, but the waste water entering the water storage cavity 53 can be oozed and volatilized through the air holes. Preferably, the pore diameter of the air hole is between 1 μm and 30 μm, and leakage caused by overflow of the waste water from the air hole can be further prevented.

This process is not immediately completed, but by providing a plurality of air holes, evaporation efficiency can be significantly increased compared with the current evaporation of water directly through the narrow mouth of the drain pipe 4, which is sufficient to evaporate all the waste water in the water storage chamber 53 before the next washing, for example, within 24 hours. By increasing the volume of the water storage container 5, more waste water can be stored at a time, the distribution of air holes is more dense, and the volatilization and disappearance of waste water in the water storage cavity 53 can be accelerated by arranging more air holes.

After washing or rinsing is completed, when the generated waste water is required to be discharged to the sewer pipe 7, the drainage pump 44 is started, the waste water is discharged to the sewer pipe 7 through the drainage pipe 4, at the beginning, part of the waste water enters the water storage cavity 53 through the connecting pipe 6 to fill the water storage cavity 53, and at the moment, the waste water cannot overflow through the air holes immediately. Along with the continuous discharge of waste water in barrel 2, reach drainage time or reach the water level of defaulting drainage after, drain pump 44 stop work, at the moment of stopping, the waste water that fails to discharge drain pipe 4 flows back to the horizontal segment of drain pipe 4 under the action of gravity in first section 41, second section 42, drain pump 44 and third section 43, along with the waste water in the reservoir constantly oozes and volatilizes through the gas pocket, waste water that flows back to drain pipe 4 continues to fill water storage cavity 53 through connecting pipe 6, until the waste water is completely volatilized through the gas pocket, thereby prevent remaining waste water and stay in drain pipe 4, breeds the bacterium and mildews after long-time storage, finally improved user experience.

In some embodiments, the connection pipe 6 is communicated with the second section 42 in the drain pipe 4, can be communicated with the third section 43 in the drain pipe 4, can be communicated with the bottom of the filter 45, or can be communicated with the bottom of the impeller cavity of the drain pump 44, and the connection pipe 6 is communicated with the lowest part of the drain pipe 4, so that more waste water can flow back into the water storage cavity 53, and the waste water treatment effect is improved.

In this embodiment, the connection pipe 6 includes a fourth section 61 and a fifth section 62, the first end of the fourth section 61 is communicated with the bottom of the filter 45, the fourth section 61 extends in the vertical direction, the second end of the fourth section 61 is lower than the lowest position of the drain pipe 4, the second end of the fourth section 61 is communicated with the first end of the fifth section 62, the second end of the fifth section 62 is communicated with the water storage chamber 53, the fifth section 62 extends along a straight line, and the second end thereof is not higher than the first end, so that the waste water entering the fifth section 62 can flow to the water storage chamber 53 entirely under the influence of its own gravity, and interception in the connection pipe 6 is avoided.

In some embodiments, the side wall of the box body 1 is provided with a mounting opening, the water storage container 5 is mounted on the mounting opening and protrudes outwards from the side wall of the box body 1, so that most of the water storage container 5 is positioned outside the box body 1, the air holes are communicated with the outside of the box body 1, the air convection outside the box body 1 is stronger, the volatilization speed of waste water through the air holes can be improved, and the waste water remained in the drain pipe 4 disappears faster.

It is understood that the case 1 includes a front sidewall, a rear sidewall and a left sidewall and a right sidewall, and the mounting opening is formed on the rear sidewall of the case 1, so that the storage container can not appear in the line of sight of the user under normal conditions, the aesthetic degree of the washing machine can be improved, and the extremely weak smell emitted from the waste water through the air hole is not easy to smell by the user, so that the user experience can be improved. Of course, the mounting openings may be formed in the left and right side walls of the case 1.

In some embodiments, the water storage container 5 includes a box body 51 with an open side and a cover plate 52 covering the box body 51, the box body 51 forms a water storage cavity 53 inside, and the cover plate 52 can seal the water storage cavity 53 to form a closed space. The box body 51 and the cover plate 52 are detachably connected, the cover plate 52 is clamped on the mounting port to fixedly mount the water storage container 5, the connecting pipe 6 is communicated with the water storage cavity 53 through the cover plate 52, impurities carried by the waste water after the waste water volatilizes through the air holes are deposited in the water storage cavity 53, and after the waste water is used for a long time, a user can conveniently detach the box body 51 to clean the impurities therein, and the air holes are prevented from being blocked by the impurities.

In some embodiments, the edge of the cover plate 52 extends to the outside of the box body 51 to form a ring protrusion 54, one side of the ring protrusion 54, facing the box body 51, of the cover plate 52 is enclosed to form a groove body structure, and one end of the box body 51 where the opening is located is clamped in the ring protrusion 54, so that the box body 51 and the cover plate 52 can be detachably connected, when the box body 51 is installed, one end of the box body 51 where the opening is inserted into the ring protrusion 54 is clamped, and when the box body 51 is removed, the box body 51 can be pulled out. It will be appreciated that the inner peripheral wall profile of the annular projection 54 conforms to the shape of the cassette body 51, such as being cylindrical or cylindrical, for example, to facilitate docking.

In some embodiments, a sealing member 55 is further clamped between the annular protrusion 54 and the box body 51, and the sealing member 55 can improve the sealing performance of the contact part between the annular protrusion 54 and the box body 51 and prevent waste water from directly leaking out from the space between the annular protrusion 54 and the box body 51. The sealing member 55 may be a sealing ring sleeved on the outer periphery of the box body 51.

In some embodiments, the annular protrusion 54 and the box 51 may be detachably connected by threads, and the box 51 may be screwed to achieve mounting and dismounting, so that the two may be sealed by threads.

In some embodiments, the middle part of the cover plate 52 extends into the box 1 to form a butt joint part 56, a hollow channel communicated with the water storage cavity 53 is formed inside the butt joint part 56, the butt joint part 56 is in sealed connection with the connecting pipe 6, waste water in the drain pipe 4 sequentially enters the water storage cavity 53 through the connecting pipe 6 and the hollow channel, and the cover plate 52 is connected with the connecting pipe 6 in a connection mode through the butt joint part 56 so as to be convenient for installing and detaching the two. The edge of the cover plate 52 extends towards the inner side of the box body 1 and is also provided with an elastic clamping hook 57, the elastic clamping hook 57 is hooked on the inner edge of the mounting opening, and the elastic clamping hook 57 has elasticity in the radial direction of the mounting opening, so that the cover plate 52 is mounted on the mounting opening and clamped by the elastic function. Of course, the cover plate 52 can also be directly clamped on the mounting opening, so as to be fixedly connected with the side wall of the box body 1.

In some embodiments, the cartridge 51 is a ceramic substrate, or the sand material is made by a sintering process to form pores of such pore size that are distributed across the various surfaces of the cartridge 51 for increased volatilization efficiency.

To sum up, as shown in fig. 1, after the washing or rinsing is completed, the drain pump 44 pumps the waste water into the drain pipe 7, and at this time, the drain pipe 4 is preferably filled with the waste water, and part of the waste water fills the connecting pipe 6 and the water storage chamber 53 under the action of gravity.

Fig. 5 illustrates a third schematic diagram of a washing machine drain process according to some embodiments.

As shown in fig. 5, when the set drainage time or the default drainage water level is reached, the residual waste water in the drainage pipe 4 flows back and continues to fill the partial pipe section of the drainage pipe 4, the connection pipe 6 and the water storage chamber 53.

Along with the continuous exudation and volatilization of the wastewater in the water storage cavity 53 through the air holes, the water level in the water storage cavity 53 is reduced, and the wastewater in the water drain pipe 4 and the connecting pipe 6 continuously enters the water storage cavity 53 until no wastewater remains in the water drain pipe 4, the connecting pipe 6 and the water storage cavity 53 as shown in fig. 2.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.

Claims (10)

1. A washing machine, comprising:

a case;

the cylinder body is arranged in the box body, and a water outlet is formed in the bottom of the cylinder body;

the first end of the drain pipe is connected with the water outlet, the second end of the drain pipe extends out of the box body and is used for discharging waste water in the cylinder body out of the box body, and the second end of the drain pipe is higher than the water outlet;

the drainage pump is arranged on the drainage pipe and used for pumping waste water in the drainage pipe out of the box body;

the water storage container is arranged on the box body and is positioned at the lower side of the drain pipe, a water storage cavity is arranged in the water storage container, the water storage cavity is communicated with the drain pipe through a connecting pipe, a plurality of air holes which are communicated with the water storage cavity and the outside are formed in the surface of the water storage container, and the aperture of each air hole is between 1 mu m and 100 mu m, so that waste water entering the water storage cavity seeps out through the air holes and volatilizes.

2. The washing machine as claimed in claim 1, wherein the case side wall is provided with a mounting opening, and the water storage container is mounted on the mounting opening and protrudes outward from the case side wall so that the air hole communicates with the outside of the case.

3. The washing machine as claimed in claim 2, wherein the water storage container comprises a box body with an opening at one side and a cover plate covered on the opening of the box body, the cover plate is clamped on the mounting opening, the water storage cavity is formed in the box body, the connecting pipe is communicated with the water storage cavity through the cover plate, and the box body is detachably connected with the cover plate.

4. A washing machine as claimed in claim 3 wherein the cover plate extends outwardly of the cabinet to form a collar, and one end of the cabinet where the opening is located is engaged with the collar.

5. The washing machine as claimed in claim 4, wherein a sealing member is further interposed between the annular protrusion and the case.

6. The washing machine as claimed in claim 3, wherein a butt joint part is formed in the middle of the cover plate and extends into the box body, a hollow channel communicated with the water storage cavity is formed in the butt joint part, the butt joint part is inserted into the connecting pipe in a sealing manner, and wastewater in the drain pipe sequentially enters the water storage cavity through the connecting pipe and the hollow channel.

7. A washing machine as claimed in claim 3 wherein the casing is a ceramic substrate and the air holes extend over the respective surfaces of the casing.

8. The washing machine as claimed in claim 1, wherein the drain pipe is further provided with a filter for filtering the waste water, the drain pipe includes a first section, a second section and a third section, the first section is communicated with the drain outlet and the inlet of the filter, the second section is communicated with the outlet of the filter and the inlet of the drain pump, and the third section is communicated with the outlet of the drain pump and the outside of the tank.

9. The washing machine as claimed in claim 8, wherein a filter chamber is provided inside the filter, a filter screen is horizontally provided inside the filter chamber, and an inlet and an outlet of the filter are respectively located at upper and lower sides of the filter screen.

10. The washing machine as claimed in claim 8, wherein the connection pipe includes a fourth section and a fifth section, a first end of the fourth section being in communication with the filter bottom, the fourth section extending in a vertical direction, a second end of the fourth section being in communication with the first end of the fifth section, a second end of the fifth section being in communication with the water storage chamber, the fifth section extending in a straight line, and a second end of the fifth section being not higher than the first end.