阅读说明：本技术 一种洗碗机的排水装置 (Water drainage device of dish washer ) 是由 李一峰 余水勇 于 2019-10-30 设计创作，主要内容包括：本发明公开一种洗碗机的排水装置,包括进水通道、出水通道及进气通道,进水通道的下末端设为进水口,出水通道的下末端设为出水口,而进水通道的上末端与出水通道的上末端在预设的交汇处相连通,交汇处设有进气槽,进气通道的上末端设有位置高于交汇处的进气口,且进气通道的下末端与进气槽与相连通；排水装置还包括设在进气通道内以避免出水通道内的废水倒灌至进气口的空气阀。本发明整体结构简单且可靠性高,由进气口通过进气通道给交汇处提供气压平衡以避免发生废水回流虹吸,在进气通道设置整体可靠且灵敏的空气阀来确保排水装置整体不会因发生废水倒灌失效以提高可靠性。(The invention discloses a drainage device of a dish washing machine, which comprises a water inlet channel, a water outlet channel and an air inlet channel, wherein the lower tail end of the water inlet channel is provided with a water inlet, the lower tail end of the water outlet channel is provided with a water outlet, the upper tail end of the water inlet channel is communicated with the upper tail end of the water outlet channel at a preset intersection, the intersection is provided with an air inlet groove, the upper tail end of the air inlet channel is provided with an air inlet which is higher than the intersection, and the lower tail end of the air inlet channel is communicated with the air inlet groove; the drainage device also comprises an air valve which is arranged in the air inlet channel to prevent the waste water in the water outlet channel from flowing backwards to the air inlet. The drainage device is simple in integral structure and high in reliability, the air inlet provides air pressure balance for the junction through the air inlet channel so as to avoid waste water backflow siphoning, and the air inlet channel is provided with an integral reliable and sensitive air valve so as to ensure that the drainage device cannot be failed due to waste water backflow, so that the reliability is improved.)

1. A drainage device of a dish washing machine comprises a water inlet channel, a water outlet channel and an air inlet channel, wherein the lower tail end of the water inlet channel is provided with a water inlet, the lower tail end of the water outlet channel is provided with a water outlet, and the upper tail end of the water inlet channel is communicated with the upper tail end of the water outlet channel at a preset intersection; the drainage device also comprises an air valve which is arranged in the air inlet channel to prevent the waste water in the water outlet channel from flowing backwards to the air inlet.

2. The drain device of a dishwasher according to claim 1, wherein the water inlet and the water outlet are both located below the intersection, and the position of the water outlet is lower than the position of the water inlet by a preset height h.

3. The drain device of dishwasher according to claim 1, wherein the effective cross-sectional area S1 of the water inlet, the effective cross-sectional area S2 of the water outlet and the effective cross-sectional area S3 of the air inlet satisfy S1 ≧ S2 > S3.

4. The drain device of a dishwasher according to claim 1, wherein the water inlet passage comprises a rising convex circular arc duct extending from a lower end to an upper end.

5. The drain device of the dishwasher according to claim 4, wherein the water inlet passage further comprises a descending convex arc pipe extending in a descending arc from an upper end of the ascending convex arc pipe toward the water outlet, an upper end of the descending convex arc pipe communicates with an upper end of the ascending convex arc pipe, a lower end of the descending convex arc pipe communicates with an upper end of the water outlet passage, and the air inlet groove is provided on a top pipe wall of the descending convex arc pipe.

6. The drain device of a dishwasher according to claim 1, wherein the lower end of the water inlet passage is provided with a water inlet joint, and the lower end of the water outlet passage is provided with a water outlet joint, the water outlet joint being positioned lower than the water inlet joint.

7. The drain device of dishwasher according to claim 1, wherein the upper end of the air inlet channel is provided with a detachable connected air inlet joint, the air inlet joint is internally provided with an air inlet hole communicated with the air inlet channel, the air inlet joint is in an inverted L shape and comprises a joint lower part detachably connected with the upper end of the air inlet channel and a joint upper part transversely connected with the joint lower part 2.

8. The drain device of a dishwasher according to any one of claims 1 to 7, wherein the air valve comprises a valve body provided in the air inlet passage and a float movably provided in the valve body, a movable valve chamber for providing upward and downward floating movement of the float is provided in the valve body, an upper air hole communicating with the air inlet is provided in a top wall of the valve chamber, a lower air hole communicating with the air inlet groove is provided in a bottom wall of the valve chamber, a side air hole communicating the valve chamber with the air inlet passage is provided in a side wall of the valve body, and the side air hole is located above the float when the float is located at a bottom of the valve chamber.

9. The drain device of the dishwasher according to claim 8, wherein the bottom of the valve chamber is provided with a support part with a round-cornered upper surface, and is in contact connection with the bottom of the float through the support part; the number of the lower air holes is multiple, and the multiple lower air holes are uniformly distributed on two sides of the supporting part.

10. The drain apparatus of the dishwasher according to claim 8, wherein the bottom of the valve body is provided with two guide plates extending toward the lower opposite opening, and the two guide plates are respectively located at both sides of the lower air hole.

Technical Field

The invention relates to kitchen appliances, in particular to a drainage device of a dish washing machine.

Background

Along with the improvement of people's living standard, domestic dish washer is gradually known by people in recent years, and domestic dish washer's small is fit for the family and puts the use, because of it disinfects when having to wash the dishes simultaneously and disinfects in order to do benefit to a lot of advantages such as health, use water conservation environmental protection to deeply receive the consumer and like.

The existing household dish washing machine comprises an inner container and a drainage pipeline connected with the inner container through a drainage pump, waste water is directly drained out of the machine through the drainage pump in the drainage process, the structure can generate backflow during drainage, and water flow is enabled to generate siphon phenomenon so as to suck the waste water back into the inner container again. For solving the drainage siphon problem of dish washer, prior art adds anti-siphon subassembly in drainage pipe, and the design has the respirator intercommunication inner bag of taking the fan in anti-siphon subassembly, lets anti-siphon subassembly's inlet channel and drain line height the same, reduces the probability of taking place the drainage siphon through making the drainage speed that reduces dish washer. The prior art has at least the following defects: firstly, need increase the respirator, not only added spare part quantity, increase product size, still make the overall cost higher, secondly still have a small amount of surplus water to flow back to the inner bag after the dish washer stop work, prevent that the siphon effect is not good enough.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the drainage device of the dish washing machine, which can smoothly drain the wastewater and effectively prevent the generation of siphon backflow in the wastewater drainage process.

The invention provides a drainage device of a dish washing machine, which comprises a water inlet channel, a water outlet channel and an air inlet channel, wherein the lower tail end of the water inlet channel is provided with a water inlet, the lower tail end of the water outlet channel is provided with a water outlet, the upper tail end of the water inlet channel is communicated with the upper tail end of the water outlet channel at a preset intersection, the intersection is provided with an air inlet groove, the upper tail end of the air inlet channel is provided with an air inlet which is higher than the intersection, and the lower tail end of the air inlet channel is communicated with the air inlet groove; the drainage device also comprises an air valve which is arranged in the air inlet channel to prevent the waste water in the water outlet channel from flowing backwards to the air inlet.

In a preferred embodiment, the water inlet and the water outlet are both located below the intersection, and the position of the water outlet is lower than the position of the water inlet by a preset height h.

In a preferred embodiment, the effective cross-sectional area S1 of the water inlet, the effective cross-sectional area S2 of the water outlet and the effective cross-sectional area S3 of the air inlet satisfy S1 ≧ S2 > S3.

In a preferred embodiment, the water inlet channel comprises a raised convex circular arc pipe which is arranged in a manner of rising and extending from the lower end to the upper end.

In a preferred embodiment, the water inlet channel further comprises a descending convex circular arc pipeline extending in a descending circular arc shape from the upper end of the ascending convex circular arc pipeline to the water outlet, the upper end of the descending convex circular arc pipeline is communicated with the upper end of the ascending convex circular arc pipeline, the lower end of the descending convex circular arc pipeline is communicated with the upper end of the water outlet channel, and the air inlet groove is formed in the top pipe wall of the descending convex circular arc pipeline.

In a preferred embodiment, the lower end of the water inlet channel is provided with a water inlet joint, the lower end of the water outlet channel is provided with a water outlet joint, and the position of the water outlet joint is lower than that of the water inlet joint.

In a preferred embodiment, the upper end of the air inlet channel is provided with an air inlet joint which is detachably connected, an air inlet hole communicated with the air inlet channel is arranged in the air inlet joint, and the air inlet joint is in an inverted L shape and comprises a joint lower part which is detachably connected with the upper end of the air inlet channel and a joint upper part which is transversely connected with the joint lower part 2.

In a preferred embodiment, the air valve comprises a valve body arranged in the air inlet passage and a floater movably arranged in the valve body, a movable valve cavity for providing the up-and-down floating of the floater is arranged in the valve body, an upper air hole communicated with the air inlet is formed in the top wall of the valve cavity, a lower air hole communicated with the air inlet groove is formed in the bottom wall of the valve cavity, a side air hole communicated with the valve cavity and the air inlet passage is formed in the side wall of the valve body, and the side air hole is located above the floater when the floater is located at the bottom of the valve cavity.

In a preferred embodiment, the bottom of the valve cavity is provided with a supporting part with a round-cornered upper surface, and the supporting part is in contact connection with the bottom of the float; the number of the lower air holes is multiple, and the multiple lower air holes are uniformly distributed on two sides of the supporting part.

In a preferred embodiment, the bottom of the valve body is provided with two guide plates which extend towards the lower opening, and the two guide plates are respectively positioned at two sides of the lower air hole.

Compared with the prior art, the invention has the following beneficial effects:

the drainage device disclosed by the invention is simple in integral structure and high in reliability, the position of the water inlet is higher than the position of the water outlet but lower than the position of the intersection of the water channel and the water outlet channel, the air inlet groove is arranged at the intersection to be communicated with the air inlet channel positioned above the intersection, air pressure balance is provided for the intersection through the air inlet channel by the air inlet so as to avoid waste water backflow siphoning, waste water in the liner is quickly discharged through the water outlet channel, an air valve is arranged on the air inlet channel so that the waste water flowing through and flowing backwards cannot flow through, the waste water backflow is prevented from sealing the air inlet so as to prevent the whole drainage device from being invalid, and the air valve is reliable and sensitive in whole and provides guarantee for the integral reliability of the drainage device; the position through setting up the delivery port is lower than the position of water inlet and is predetermine height h, lets waste water need overcome this and predetermine height h at least and just probably take place to flow back to the water inlet from the delivery port for the pressure differential that waste water brought to further play and prevent that waste water from taking place the backward flow. In addition, the drainage device is simple in integral structure, low in manufacturing cost and convenient to assemble and maintain.

Drawings

Fig. 1 is a schematic view of a connection structure of an inner container and a drainage device in a dishwasher.

Fig. 2 is a perspective view of the drainage device.

Fig. 3 is a schematic view of the drain with the upper cover removed or partially cut away, and fig. 3 shows the float in the lowermost position of the check valve.

Fig. 4 is a schematic view of the internal structure of the drainage device corresponding to fig. 3.

Figure 5 is a schematic view of the drain with the upper cover removed or partially broken away with the float in the uppermost position of the check valve.

Fig. 6 is a schematic structural view of the intake joint.

Fig. 7 is a partial schematic view of the drain assembly when the air inlet fitting is not shown.

In the drawings, arrows indicate the flow direction of water or air.

Detailed Description

To further clarify the technical solutions and effects adopted by the present application to achieve the intended purpose, the following detailed description is given with reference to the accompanying drawings and preferred embodiments according to the present application. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The positions mentioned in the invention are compared by taking the orientation of the dishwasher in a normal use state as a reference.

As shown in fig. 1, the dishwasher includes at least an inner tub 9, a drain pipe 8 connected to the inner tub 9 by a drain pump (not shown in fig. 1), a waste water pipe 7 for discharging waste water in the inner tub 9 out of the dishwasher, and a drain device connected between the drain pipe 8 and the waste water pipe 7, and the drain device prevents residual waste water in the waste water pipe 7 from siphoning back into the inner tub 9 when the dishwasher is stopped.

As further shown in fig. 2-4, the drainage device includes a water inlet channel 12, a water outlet channel 22 and an air inlet channel 32, a water inlet communicated with the drainage pipe 8 is provided at the lower end of the water inlet channel 12, the upper end of the water inlet channel 12 is communicated with the upper end of the water outlet channel 22 at a preset intersection, a water outlet communicated with the waste water pipe 7 is provided at the lower end of the water outlet channel 22, an air inlet channel 23 is provided at the intersection of the water outlet channel 22 and the water outlet channel 22, an air inlet is provided at the upper end of the air inlet channel 32, the position of the air inlet is higher than the intersection, and the lower end of the air inlet channel 32 is communicated with the air inlet channel 23; the drain device further includes an air valve provided in the intake passage 32 to allow only air to pass therethrough but not wastewater to pass therethrough.

In a preferred embodiment, the water inlet and the water outlet are both located below the intersection, and the position of the water outlet is lower than the position of the water inlet by a preset height h. Specifically, as shown in fig. 4, taking an upper edge of a junction between an upper end of the water inlet channel 22 and an upper end of the water outlet channel 22 as a horizontal reference, a water inlet of the water inlet channel 22 is located at a height H1 below the junction, a water outlet of the water outlet channel 22 is located at a height H2 below the junction, and H2-H1= H, H is greater than 0, and H is preferably 0.5-10cm m. Namely, the position of the water outlet channel 22 is lower than the position of the water inlet channel 22 by a preset height h. This embodiment is low than the position of water inlet through the position that sets up the delivery port and is predetermine height h, lets waste water need overcome this and predetermine height h at least and just probably take place to flow back to the water inlet from the delivery port for the pressure differential that waste water brought to be favorable to preventing that waste water from taking place the backward flow.

In a preferred embodiment, the effective cross-sectional area S1 of the inlet is one of the factors determining the amount of wastewater that can flow from the inlet per unit time, the effective cross-sectional area S2 of the outlet is one of the factors determining the amount of wastewater that can flow from the outlet per unit time, and the effective cross-sectional area S3 of the inlet is one of the factors determining the amount of air that can enter the inlet passage 32 per unit time. In one embodiment, the effective cross-sectional area S1 of the water inlet is not smaller than the effective cross-sectional area S2 of the water outlet, and the effective cross-sectional area S3 of the air inlet is smaller than the effective cross-sectional area S2 of the water outlet, i.e., S1 is more than or equal to S2 and more than S3. This arrangement allows the air pressure in the inlet passage 32 to be small relative to the air pressure in the inlet passage 12 to balance the air pressure, allowing the waste water to drain more smoothly through the drain and without siphoning back the waste water.

Under the action of the drainage pump, after entering the water inlet channel 12 from the water inlet at a certain pressure, the wastewater in the inner container 9 is guided upwards along the water inlet channel 12 to the junction of the water inlet channel 12 and the water outlet channel 22, then enters the water outlet channel 22, and flows into the wastewater pipe 7 through the water outlet of the water outlet channel 22 to be discharged; because the intersection of the water inlet passage 12 and the water outlet passage 22 is provided with the air inlet groove 23 communicated with the air inlet passage 32, the pressure of the intersection of the water inlet passage 12 and the water outlet passage 22 is balanced with the external atmospheric pressure by the external atmosphere through the air inlet passage 32 and the air inlet groove 23, thereby avoiding the siphon phenomenon. Meanwhile, because the air valve which only allows air to flow through but prevents waste water from flowing through is arranged on the air inlet channel 32, the balance between the pressure at the intersection and the external atmospheric pressure of the external atmosphere through the air inlet channel 32 and the air inlet groove 23 cannot be ensured, and the waste water in the water outlet channel 22 can be prevented from being poured into the air inlet of the air inlet channel 32 when the pressure in the inner container 9 is too high, so that the waste water overflows the dishwasher or flows into the shell of the dishwasher to cause the failure of the dishwasher.

As shown in fig. 3-4, the air valve includes a valve body 33 disposed in the air inlet passage 32 and a float 34 movably disposed in the valve body 33, a movable valve cavity 330 for floating the float 34 up and down is disposed in the valve body 33, an upper air hole 331 communicating with the air inlet is disposed on a top wall of the valve cavity 330, a lower air hole 332 communicating with the air inlet groove 23 is disposed on a bottom wall of the valve cavity 330, a gap for air to flow through is formed between at least 2 opposite side walls of the valve body 33 and an inner side surface of the air inlet passage 32, and side air holes 334 communicating the valve cavity 330 and the air inlet passage 32 are disposed on the 2 opposite side walls, and when the float 34 is located at the bottom of the valve cavity 330, the side air holes 334 are located above the float 34. The float 34 is a light, smooth-surfaced, foamable material, preferably cylindrical or spherical in shape.

During the draining process of the dishwasher, when the air pressure P1 generates an upward pushing force to the float 34 through the lower air hole 332 at the intersection of the water inlet passage 12 and the water outlet passage 22 or the air pressure P1 of the air inlet groove 23, if the pushing force is smaller than the gravity of the float 34, the float 34 will not float upward in the valve cavity 330, and the float 34 is located at the bottom of the valve cavity 330, as shown in fig. 3 and 4. At this time, the external air sequentially passes through the air inlet of the air inlet passage 32, the upper air hole 331, the valve cavity 330 and the side air holes 334 and then flows to the air inlet groove 23 or the junction, thereby providing air pressure balance to the junction to prevent the occurrence of siphon of wastewater backflow.

It will be appreciated that when the valve chamber 330 is cylindrical with rounded corners, the float 34 will float upward or downward within the valve chamber 330 with less friction. In addition, the bottom of the valve cavity 330 is provided with a support part 333 with a round-cornered upper surface, and the support part 333 contacts with the bottom of the float 34, so that the contact area between the support part 333 and the float 34 is reduced, friction is reduced, the flexibility of the float 34 is improved, and the whole sensitivity of the air valve is favorably improved. Furthermore, the number of the lower air holes 332 is multiple, and the multiple lower air holes 332 are uniformly distributed on two sides of the supporting part 333 to provide a balanced floating thrust force to each position at the bottom of the float 34, so that the float 34 is prevented from being jammed in the valve cavity 330 due to uneven stress, and the reliability of the air valve is improved.

Furthermore, as shown in fig. 5, when the air pressure P1 at the intersection of the water inlet passage 12 and the water outlet passage 22 or in the air inlet groove 23 generates an upward pushing force on the float 34, which is greater than the gravity of the float 34, the float 34 is pushed to move upward rapidly in the valve cavity 330, so that the top of the float 34 moves to the top end of the valve cavity 330 to block the upper air hole 331, and thus the waste water entering the valve cavity 330 will fall back from the lower air hole 332 to the water outlet passage 22 under the action of gravity, as the larger air pressure flows back into the air inlet passage 32 from the air inlet groove 23 and is blocked in the valve cavity 330 by the float, and cannot flow back to the air inlet of the air inlet passage 32 through the upper air hole 331. Therefore, the air valve is arranged in the air inlet channel, so that when the air valve is used for providing balance between internal air pressure and external air pressure for the junction, the waste water can be prevented from flowing backwards to the air inlet to cause the integral failure of the drainage device, and the integral reliability of the drainage device is improved.

In order to guide the air pressure P1 at the intersection or the air inlet groove 23 to the lower air hole 332 for improving the overall sensitivity and reliability of the air valve, a set of guide plates 335 extending from the bottom of the valve body 33 toward the lower opening is disposed at the bottom of the valve body 33, and the two guide plates 335 are respectively located at two sides of the lower air hole 332. Therefore, when the pressure P1 at the intersection or the air inlet tank 23 is higher than the atmospheric pressure, the pressure P1 guides part of the wastewater to the lower air hole 332 from the bottom to the top by the deflector 335, and is more favorable for generating a large thrust on the float 34 through the lower air hole 332 so as to make the float to close the upper air hole 331.

Furthermore, in order to facilitate the communication between the drainage pipe 8 and the waste water pipe 7, the lower end of the water inlet channel 12 is provided with a water inlet joint 11 which is communicated with the drainage pipe 8 through the water inlet joint 11 for convenient disassembly and assembly, and the lower end of the water outlet channel 22 is provided with a water outlet joint 21 which is communicated with the waste water pipe 7 through the water outlet joint 21 for convenient disassembly and assembly. At this time, the position of the water outlet joint 21 is lower than that of the water inlet joint 11, so that the wastewater can be discharged from the wastewater pipe 7 more smoothly through the drainage device.

The inlet channel 12 mainly functions to guide the waste water in the drain pipe 8 to the outlet channel 22. In order to reduce the resistance of the water inlet channel 12 to the wastewater and enable the wastewater to flow to the water outlet channel 22 more smoothly, the water inlet channel 12 is preferably an arc-shaped channel, which may be a convex arc-shaped channel or a concave arc-shaped channel. Preferably, the water inlet passage 12 includes a raised convex circular arc pipe 121 extending from the lower end to the upper end. In addition, the lower end of the arc pipe is fixedly connected to the water inlet joint 11, and the upper end of the arc pipe is communicated with the water outlet channel 22, in order to further enable the wastewater to flow more smoothly from the upper end of the water inlet channel 12 to the water outlet channel 22, in a preferred embodiment, the water inlet channel 12 further comprises a descending convex arc pipe 122 extending in a descending arc shape from the upper end of the ascending convex arc pipe 121 toward the water outlet, the upper end of the descending convex arc pipe 122 is communicated with the upper end of the ascending convex arc pipe 121, and the lower end of the descending convex arc pipe 122 is communicated with the upper end of the water outlet channel 22. The intake duct 23 is provided in the ceiling wall 123 of the descending convex arc duct 122. Thus, after being guided by the ascending convex arc pipeline 121 with small resistance, the wastewater smoothly enters the water outlet channel 22 along the descending convex arc pipeline 122 under the action of gravity, the whole process is smooth, the resistance is small, and the wastewater is favorably discharged out of the dishwasher smoothly.

The upper end of the water outlet channel 22 is higher than the water outlet at the lower end, so that the wastewater can flow from the water outlet channel 22 to the wastewater pipe 7. The water outlet channel 22 preferably adopts a straight pipe, which can be a vertically arranged straight pipe or an obliquely arranged straight pipe, and the straight pipe is beneficial to the smooth flow of the wastewater into the wastewater pipe 7.

The inlet channel 12, the outlet channel 22 and the inlet channel 32 are integrated to ensure reliable connection of the inlet channel 12, the outlet channel 22 and the inlet channel 32, and of course, the inlet channel 12, the outlet channel 22 and the inlet channel 32 may be separated. For example, the drainage device includes a lower cover and an upper cover, the lower cover is provided with the water inlet passage 12, the water outlet passage 22 and the air inlet passage 32, and the upper cover is hermetically fixed to the lower cover by using a technique such as thermal welding. Wherein, the outer side of the lower cover is provided with a plurality of fixing parts 4, and the water discharging device can be integrally assembled on the outer side of the inner container 9 by penetrating the fixing parts 4 through screws. The structure is favorable for reducing the number of moulds of the drainage device, reducing the manufacturing cost and assembling or disassembling the drainage device for maintenance.

An air inlet at the upper tail end of the air inlet channel 32 is communicated with an air inlet window arranged on one side plate of the shell of the dishwasher, so that external air enters the air inlet channel 32 from the air inlet window and the air inlet. As shown in fig. 6 and 6, an air inlet joint 31 may be further disposed at the air inlet to facilitate communication between the upper end of the air inlet channel 32 and the air inlet window. The air inlet connector 31 is arranged at the upper end of the air inlet channel 32, and the air inlet connector 31 and the air inlet channel 32 are of an integral structure or a split structure.

In one embodiment, the air inlet connector 31 is detachably mounted to the upper end of the air inlet passage 32. The periphery of the upper end of the air inlet channel 32 is provided with a lower step portion 321, the air inlet connector 31 is internally provided with an air inlet 311 communicated with the recent channel 32, the lower end of the air inlet connector 31 is provided with an upper step portion 314, and the upper step portion 314 is sleeved with the lower step portion 321, so that the air inlet connector 31 is detachably arranged at the upper end of the air inlet channel 32. Furthermore, one of the lower end of the air inlet connector 31 and the upper end of the air inlet channel 32 is provided with a locking protrusion 322, and the other is correspondingly provided with a locking buckle 315, so that the locking buckle 322 is locked in the locking buckle 315 to improve the reliability of the detachable connection structure between the air inlet connector 31 and the air inlet channel 32.

In one embodiment, the air inlet connector 31 is integrally formed in an inverted L shape, and the air inlet connector 31 includes a connector lower portion 312 detachably connected to an upper end of the air inlet passage 32 and a connector upper portion 313 transversely connecting the connector lower portion 312, and is conveniently communicated with an air inlet window on a side plate of a housing of the dishwasher through the more convenient connector upper portion 313. The upper step 314 and the latch 315 are both disposed on the joint lower portion 312. It is understood that the effective cross-sectional area S3 of the air inlet is the effective cross-sectional area of the air inlet hole 311 on the joint upper portion 313.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.