Respirator for dish washing machine and dish washing machine

Abstract

The respirator for the dish washing machine comprises a shell, a breathing cavity communicating with a breathing opening and an exhaust opening and a water flow channel communicating with a water inlet and a water outlet are defined in the shell, and the water flow channel comprises an upper flow channel and a lower flow channel; the tail end of the upper runner and the head end of the lower runner are arranged on the same side and are communicated with each other; a lower wall plate of the lower runner is provided with a through hole penetrating in the wall thickness direction of the lower wall plate; a water passing channel is defined between the insert, the first embedding part and the second embedding part, the first embedding part and the peripheral wall of the lower flow channel, and a communicating channel communicating the breathing opening and the water passing channel is defined by the side edge of the through hole, the second embedding part and the side wall plate. The pressure between the water flow channel and the atmosphere can be balanced, the siphonage phenomenon in the water flow channel can be effectively prevented when the sink dish-washing machine works, on the other hand, the situation that water flow at the through hole is cut off is further avoided, the water flow can quickly pass through, and the working performance of the dish-washing machine is better.

Description

Technical Field

[0001] The present application relates to the technical field of dishwashers, and in particular to a breather for a dishwasher and the dishwasher. Background Art

[0002] A dishwasher is a household appliance used to wash dishes. Its common functions include washing, drying, disinfection, storage, water softening, etc. The breather is an important component of the dishwasher. It balances the pressure inside the dishwasher tank with the external pressure. When the dishwasher is drying, the presence of the breather prevents the pressure inside the dishwasher tank from rising, thereby ensuring the safe use of the dishwasher.

[0003] A water flow channel is usually provided in the above-mentioned respirator, and water is supplied to the dishwasher through the water flow channel. However, a siphon phenomenon is easily generated due to negative pressure during the water intake process. Utility Model Content

[0004] Based on this, it is necessary to provide a breather for a dishwasher to reduce the probability of siphoning when supplying water to the dishwasher.

[0005] The present application provides a breather for a dishwasher, comprising a shell, provided with a water inlet, a breathing port connected to a washing chamber of the dishwasher, an exhaust port connected to the breathing port, and a drain port connected to the water inlet, wherein the wall panel provided with the breathing port on the shell is defined as a side wall panel, the interior of the shell is defined to form a breathing cavity connected to the breathing port and the exhaust port, and a water flow channel connected to the water inlet and the drain port, the water flow channel comprising an upper flow channel and a lower flow channel located below the upper flow channel and arranged side by side with the upper flow channel, the upper flow channel and the lower flow channel being arranged in sequence along the direction of water flow in the water flow channel, and the tail end of the upper flow channel is arranged on the same side as the head end of the lower flow channel and is connected, and the lower wall panel of the lower flow channel is provided with a through hole penetrating along the direction of its wall thickness;

[0006] The insert includes a first insert located in the lower flow channel and a second insert located at least partially in the through hole. The first insert and the peripheral wall of the lower flow channel define a water passage connecting the upper flow channel and the drain outlet. The side edge of the through hole, the second insert and the side wall plate jointly define a connecting channel connecting the breathing port and the water passage.

[0007] In one embodiment, the upper flow channel and the lower flow channel both surround the periphery of a portion of the breathing port and are located above the breathing port, and both the upper flow channel and the lower flow channel are arched upward.

[0008] In one embodiment, the water inlet and the drain are both located at the bottom of the shell, and the water flow channel includes an upwardly extending upward channel and a downwardly extending downward channel, the lower end of the upward channel is connected to the water inlet, and the upper end of the upward channel is connected to the head end of the upward flow channel, the end of the downward flow channel is connected to the upper end of the downward channel, and the lower end of the downward channel is connected to the drain.

[0009] In one embodiment, a Hall flow meter is provided in the upward channel for measuring the flow of water flowing through the upward channel.

[0010] In one embodiment, the first embedded portion is an upwardly arched arc strip, the second embedded portion is an arc block formed on the bottom surface of the arc strip, the arc block extends toward the side wall plate, and includes an extension portion located between the arc strip and the side wall plate, the top surface of the extension portion is an upwardly arched arc surface, and the arc surface and the side wall plate, the arc strip and the upper wall plate of the lower flow channel jointly define a water flow gap.

[0011] In one embodiment, the water flow direction in the upper flow channel is defined as a first direction, and the water flow direction in the lower flow channel is defined as a second direction. The water flow channel also includes a contraction channel and an expansion channel arranged in sequence along the second direction. The water flow gap is located between the contraction channel and the expansion channel, and connects the contraction channel and the expansion channel. The cross-sectional area of ​​the contraction channel gradually decreases along the second direction, and the cross-sectional area of ​​at least part of the water flow gap and the expansion channel gradually increases along the second direction.

[0012] In one embodiment, the interior of the shell defines a sewage chamber, and the lower portion of the shell is provided with a sewage inlet and a sewage outlet both connected to the sewage chamber. The sewage chamber is located beside the water flow channel and the breathing chamber, and the wall panel of the sewage chamber is provided with an opening connected to the breathing chamber. A baffle capable of opening or closing the opening is provided in the sewage chamber.

[0013] In one embodiment, the interior of the shell is defined to form a water storage chamber for storing residual water in the washing chamber, the lower portion of the shell is provided with a water outlet connected to the water storage chamber, and the water flow channel is at least partially located between the sewage chamber and the water storage chamber.

[0014] In one embodiment, the exhaust port is located on the top wall of the shell, and an upwardly extending air guide duct is provided at the exhaust port.

[0015] The present application also provides a dishwasher, comprising a housing and a breather, wherein the interior of the housing defines a washing chamber, and the breather is arranged on the outer wall surface of the side wall plate of the housing, and the breather is the breather described in any one of the above embodiments.

[0016] Compared to the prior art, in the respirator provided by the present application, the first embedded portion of the insert is located in the downflow channel and defines a water passage with the wall of the downflow channel, thereby reducing the volume of the downflow channel, increasing the flow rate of water in the downflow channel, ensuring that water flows quickly through the water passage, and avoiding water backflow. The second embedded portion of the insert is located in the through hole, which connects the downflow channel and the breathing port. In this case, the second embedded portion, the side edge of the through hole, and the side wall plate together define a connecting passage connecting the water passage and the breathing port, that is, reducing the size of the through hole connecting the water passage and the breathing port. On the one hand, it can balance the pressure between the water passage and the atmosphere, effectively preventing the occurrence of siphoning in the water passage when the sink dishwasher is operating, and on the other hand, it further avoids the situation where the water flow is cut off at the through hole, allowing water to pass quickly and improving the operating performance of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A perspective view of a respirator according to an embodiment of the present application;

[0019] Figure 2 for Figure 1 A cross-sectional view of the respirator is shown;

[0020] Figure 3 for Figure 2 A partial enlarged view of point I in the middle;

[0021] Figure 4 for Figure 2 A partial enlarged view of position II in the middle;

[0022] Figure 5 for Figure 1 A cross-sectional view of the respirator from another angle is shown;

[0023] Figure 6 A cross-sectional view of a respirator according to an embodiment of the present application;

[0024] Figure 7 for Figure 6 A partial enlarged view of point III in the middle;

[0025] Figure 8 This is a perspective view of a respirator equipped with a fan according to another embodiment of the present application;

[0026] Figure 9 for Figure 1 Schematic diagram of the structure of the insert in the respirator is shown.

[0027] Reference numerals: 1, shell; 11, side wall plate; 111, breathing port; 112, water inlet; 12, top wall plate; 121, exhaust port; 13, bottom wall plate; 131, drain port; 14, breathing chamber; 15, water flow channel; 150, upflow channel; 151, upflow channel; 1510, head end; 1511, tail end; 152, downflow channel; 1520, head end; 1521, through hole; 1522, tail end; 153, downflow channel; 16, sewage chamber; 16 0. Sewage inlet; 161. Limiting groove; 1611. Opening; 162. Baffle; 163. Sewage outlet; 17. Water storage chamber; 171. Water outlet; 2. Insert; 21. First insert; 22. Second insert; 221. Extension; 2211. Arc-shaped surface; 3. Water passage; 30. Contraction passage; 31. Water gap; 32. Expansion passage; 4. Connecting passage; 5. Air duct; 6. Fan; 7. Hall flowmeter; 71. Housing; 72. Impeller. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0033] See Figures 1 to 9 The present application provides a dishwasher, which includes a box body and a breather. The interior of the box body defines a washing chamber, and the breather is provided on the outer wall surface of the side wall plate 11 of the box body and is arranged vertically.

[0034] like Figure 1 and Figure 2 As shown, the above-mentioned respirator includes a shell 1 and an insert 2. The shell 1 is provided with a water inlet 112, an exhaust port 121 and a drain port 131, and the side wall plate 11 of the shell 1 is provided with a breathing port 111. The breathing port 111 is connected to the washing chamber of the dishwasher, and a nut connected to the wall plate of the box body is installed at the breathing port 111. The exhaust port 121 is connected to the breathing port 111. In one embodiment, the exhaust port 121 is located on the top wall plate 12 of the shell 1, and an upwardly extending air duct 5 is inserted into the exhaust port 121. In another embodiment, the air duct 5 is formed at the exhaust port 121. Since the temperature inside the washing chamber rises when the dishwasher is working, the above-mentioned air duct 5 also has the function of preventing the temperature and pressure inside the washing chamber from being too high. At the same time, the discharged water vapor is kept away from the box body, which better protects the circuit and reduces the hidden danger of the box body being damp.

[0035] like Figure 2 As shown, the interior of the housing 1 defines a breathing cavity 14 communicating with the breathing port 111 and the exhaust port 121. In one embodiment, as shown in FIG. Figure 8 As shown, a fan 6 is installed in the breathing chamber 14. After the dishwasher finishes operation, the fan 6 exhausts the hot air in the washing chamber through the breathing port 111, the breathing chamber 14, and the air duct 5. In another embodiment, a PTC (Positive Temperature Coefficient), also known as a thermistor (not shown), is installed in the breathing chamber 14. This heats the outside air by introducing it through the air duct, and then introducing the heated air into the washing chamber through the breathing port 111, thereby drying the washing chamber.

[0036] The drain port 131 is connected to the water inlet 112. In one embodiment, the water inlet 112 and the drain port 131 are both located on the bottom wall 13 of the housing 1. In another embodiment, Figure 1 and Figure 2 As shown, the drain port 131 is located on the bottom wall 13 of the housing 1, and the water inlet 112 is located near the bottom of the side wall 11 of the housing 1. In other words, the water inlet 112 and the drain port 131 are both located at the bottom of the housing 1. The drain port 131 is generally connected to the inlet of the water softener.

[0037] like Figure 2 、 Figure 6 and Figure 8 As shown, the interior of the housing 1 defines a water flow channel 15 communicating with the water inlet 112 and the water outlet 131. In one embodiment, as shown in FIG. Figure 2 As shown, the water flow channel 15 includes an upper flow channel 151 and a lower flow channel 152 arranged in sequence along the direction of water flow in the water flow channel 15. The upper flow channel 151 and the lower flow channel 152 are both arched upward, and both the upper flow channel 151 and the lower flow channel 152 surround the periphery of a portion of the breathing port 111 and are both located above the breathing port 111. In this embodiment, the upper flow channel 151 and the lower flow channel 152 are arranged side by side, and the upper flow channel 151 is located above the lower flow channel 152. The tail end 1511 of the upper flow channel 151 is arranged on the same side as the head end 1520 of the lower flow channel 152, and the tail end 1511 of the upper flow channel 151 is connected to the head end 1520 of the lower flow channel 152. In another embodiment, the water flow channel 15 further includes an upwardly extending upward channel 150 and a downwardly extending downward channel 153. Specifically, the lower end of the upstream channel 150 is connected to the water inlet 112, and the upper end of the upstream channel 150 is connected to the head end 1510 of the upstream channel 151, the end 1522 of the downstream channel 152 is connected to the upper end of the downstream channel 153, and the lower end of the downstream channel 153 is connected to the drain outlet 131.

[0038] In one embodiment, both the ascending channel 150 and the descending channel 153 are located in front of the breathing port 111, and at least a portion of each of the ascending channel 150 and the descending channel 153 is an inclined channel that gradually slopes from bottom to top toward the rear. In another embodiment, both the ascending channel 150 and the descending channel 153 are located behind the breathing port 111, and at least a portion of each of the ascending channel 150 and the descending channel 153 is an inclined channel that gradually slopes from bottom to top toward the front.

[0039] In one embodiment, if Figure 2 、 Figure 4 、 Figure 6 and Figure 7 As shown, the lower wall plate of the lower flow channel 152 is provided with a through hole 1521 that penetrates along the wall thickness direction. The above-mentioned insert 2 includes a first insert portion 21 located in the lower flow channel 152 and a second insert portion 22 at least partially located in the through hole 1521. Figure 3 、 Figure 5 and Figure 7 As shown, a water passage 3 connecting the upper flow channel 151 and the drain outlet 131 is defined between the first embedded portion 21 and the peripheral wall of the lower flow channel 152, and a connecting channel 4 is defined between the side edge of the through hole 1521, the second embedded portion 22 and the side wall plate 11. The breathing port 111 and the water passage 3 are both connected to the connecting channel 4, that is, the connecting channel 4 connects the above-mentioned breathing port 111 and the water passage 3.

[0040] As can be understood, the first insert portion 21 of the insert 2 is located within the lower flow channel 152 and defines a water passage 3 with the wall surface of the lower flow channel 152. This reduces the volume of the lower flow channel 152, increases the flow rate of water within the lower flow channel 152, ensures that water flows quickly through the water passage 3, and prevents water backflow. The second insert portion 22 of the insert 2 is located within the through hole 1521, which connects the lower flow channel 152 with the breathing port 111. At this time, the second insert portion 22, the side edge of the through hole 1521, and the side wall plate 11 together define a connecting passage 4 connecting the water passage 3 and the breathing port 111. This reduces the size of the through hole 1521 connecting the water passage 3 and the breathing port 111. On the one hand, this balances the pressure between the water passage 15 and the atmosphere, effectively preventing siphoning within the water passage when the sink dishwasher is operating. On the other hand, it further prevents the water flow from being interrupted at the through hole 1521, allowing water to flow quickly.

[0041] like Figure 4 、 Figure 5 and Figure 8As shown, the first embedded portion 21 is an upwardly arched arc strip, and the second embedded portion 22 is an arc block formed on the bottom surface of the arc strip. The arc block is limited in the above-mentioned through hole 1521. In one embodiment, the top surface of the arc strip, the side wall plate 11 and the upper wall plate of the lower flow channel 152 together define a water flow gap 31. In this embodiment, the arc block extends toward the side wall plate 11 and includes an extension portion 221 located between the arc strip and the side wall plate 11. The top surface of the extension portion 221 is an upwardly arched arc surface 2211. The arc surface 2211, the side wall plate 11, the arc strip and the upper wall plate of the lower flow channel 152 together define a water flow gap 31.

[0042] like Figure 4 As shown, the direction of water flow in the upper channel is defined as a first direction A, and the direction of water flow in the lower channel is defined as a second direction B. The water passage 3 also includes a contraction channel 30 and an expansion channel 32 arranged sequentially along the second direction B. A water passage gap 31 is located between the contraction channel 30 and the expansion channel 32, and the water passage gap 31 connects the contraction channel 30 and the expansion channel 32. In one embodiment, the cross-sectional area of ​​the contraction channel 30 gradually decreases along the second direction B, while the cross-sectional areas of a portion of the water passage gap 31 and the expansion channel 32 gradually increase along the second direction B. In another embodiment, the cross-sectional areas of the entire water passage gap 31 and the expansion channel 32 gradually increase along the second direction B.

[0043] It is understood that the water entering through the upward channel 150 accelerates dramatically after passing through the contracting channel 30, allowing the water to quickly enter the water gap 31. The water then slows down slightly after passing through the water gap 31, ensuring that the water flows rapidly while continuously converging within the expanding channel 32, ultimately entering the dishwasher's washing chamber through the downward channel 153. Furthermore, this prevents damage to the water softener caused by excessive pressure at the drain outlet 131.

[0044] like Figure 2 As shown, a Hall effect flowmeter 7 is installed within upstream channel 150 to measure the flow rate of water flowing through upstream channel 150. The meter comprises a housing 71 and an impeller 72 disposed within housing 71. Impeller 72 is a magnetic rotor with a magnet having north and south poles. A Hall effect element (not shown) is housed within housing 71. The Hall effect element emits a pulse for each rotation of the magnetic rotor. The flow rate through the flowmeter is calculated based on the number of pulses.

[0045] It can be understood that the Hall flowmeter 7 has advantages over the traditional reed tube flowmeter in terms of low failure rate, low water quality requirements and high measurement accuracy.

[0046] like Figure 2 、 Figure 6 and Figure 8As shown, the interior of the housing 1 defines a sewage chamber 16, and the housing 1 is provided with a sewage inlet 160 and a sewage outlet 163, both of which are in communication with the sewage chamber 16. In one embodiment, the sewage inlet 160 and the sewage outlet 163 are both located on the bottom wall 13 of the housing 1. In another embodiment, the sewage inlet 160 and the sewage outlet 163 are both located near the bottom of the side wall 11. In other words, the sewage inlet 160 and the sewage outlet 163 are both located at the bottom of the housing 1.

[0047] In one embodiment, the sewage chamber 16 is located only beside the breathing chamber 14. Figure 2 and Figure 3 As shown, the sewage chamber 16 is located adjacent to the water flow channel 15 and the breathing chamber 14. The wall of the sewage chamber 16 defines an opening 1611 that communicates with the breathing chamber 14. A baffle 162 is disposed within the sewage chamber 16, capable of opening or closing the opening 1611. In one embodiment, a driver drives the movement of the baffle 162 to open or close the opening 1611. In another embodiment, the baffle 162 is an elastic plate that tends to move away from the opening 1611, thereby opening the opening 1611. Specifically, a retaining groove 161 is disposed within the sewage chamber 16. The opening 1611 is located on the wall adjacent to the breathing chamber 14. One end of the baffle 162 is retained within the retaining groove 161, while the other end, under pressure, moves toward the opening 1611, thereby blocking the opening 1611 and preventing sewage from flowing out through the opening 1611.

[0048] It is understood that when the dishwasher is discharging waste, the wastewater in the washing chamber enters the wastewater chamber 16 through the wastewater inlet 160. At this time, the gas mixed in the wastewater flows toward the wastewater outlet 163 and the opening 1611. The baffle 162 moves toward the opening 1611 under the pressure of the air pressure, thereby blocking the opening 1611. The greater the flow rate during wastewater discharge, the higher the air pressure at the baffle 162, the better the sealing of the wastewater chamber 16, the more difficult it is for the wastewater level to rise due to the air pressure, and the better the wastewater discharge effect. At the end of wastewater discharge, the pressure in the wastewater chamber 16 decreases, and the baffle 162 is opened by the external pressure. At this time, a certain amount of water will be present in the wastewater outlet 163, sealing the wastewater outlet 163, achieving a liquid seal effect and preventing foreign matter from entering.

[0049] like Figure 2 、 Figure 6 and Figure 8 As shown, the interior of the housing 1 defines a water storage chamber 17 for storing excess water in the washing chamber. A water inlet 171 is provided at the lower portion of the housing 1, communicating with the water storage chamber 17. In one embodiment, the water inlet 171 is located near the bottom of the side wall 11. In this embodiment, the water inlet 171 is located on the bottom wall 13 of the housing 1. The water flow channel 15 is at least partially located between the sewage chamber 16 and the water storage chamber 17.

[0050] It is understood that after the dishwasher completes its draining operation, the remaining water in the washing chamber can be pumped into the water storage chamber 17. Since the remaining water is relatively clean after the dishwasher completes its operation, gravity can be used to draw the remaining water stored in the water storage chamber 17 into the dishwasher's washing chamber for use the next time the dishwasher is started, thus fully utilizing water resources. The various technical features of the above-described embodiments may be combined in any manner. For the sake of brevity, not all possible combinations of the various technical features in the above-described embodiments are described. However, as long as these combinations of technical features do not conflict with each other, they should be considered within the scope of this specification.

[0051] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A breather for a dishwasher, characterized in that: include: A shell (1) is provided with a water inlet (112), a breathing port (111) connected to a washing chamber of a dishwasher, an exhaust port (121) connected to the breathing port (111), and a drain port (131) connected to the water inlet (112); a wall panel provided with the breathing port (111) on the shell (1) is defined as a side wall panel (11); and the interior of the shell (1) is defined to be provided with a breathing cavity (14) connected to the breathing port (111) and the exhaust port (121), and a water flow channel (131) connected to the water inlet (112) and the drain port (131). 15), the water flow channel (15) comprises an upper flow channel (151) and a lower flow channel (152) located below the upper flow channel (151) and arranged side by side with the upper flow channel (151), the upper flow channel (151) and the lower flow channel (152) are arranged in sequence along the flow direction of the water in the water flow channel (15), and the tail end (1511) of the upper flow channel (151) and the head end (1520) of the lower flow channel (152) are arranged on the same side and are connected, and the lower wall plate of the lower flow channel (152) is provided with a through hole (1521) penetrating along the wall thickness direction; The insert (2) comprises a first insert (21) located in the lower flow channel (152) and a second insert (22) at least partially located in the through hole (1521), wherein the first insert (21) and the peripheral wall of the lower flow channel (152) define a water passage (3) connecting the upper flow channel (151) and the drain outlet (131), and the side edge of the through hole (1521), the second insert (22) and the side wall plate (11) together define a connecting channel (4) connecting the breathing port (111) and the water passage (3).

2. The respirator according to claim 1, wherein The upper flow channel (151) and the lower flow channel (152) both surround the periphery of a portion of the breathing port (111) and are both located above the breathing port (111). The upper flow channel (151) and the lower flow channel (152) both arch upward.

3. The respirator according to claim 2, wherein: The water inlet (112) and the drain outlet (131) are both located at the bottom of the shell (1); the water flow channel (15) comprises an upwardly extending upward channel (150) and a downwardly extending downward channel (153); the lower end of the upward channel (150) is connected to the water inlet (112), and the upper end of the upward channel (150) is connected to the head end (1510) of the upstream channel (151); the end (1522) of the downstream channel (152) is connected to the upper end of the downward channel (153), and the lower end of the downward channel (153) is connected to the drain outlet (131).

4. The respirator according to claim 3, characterized in that A Hall flow meter (7) for measuring the flow of water flowing through the upward channel (150) is provided in the upward channel (150).

5. The respirator according to claim 1, wherein The first embedded portion (21) is an upwardly arched arc strip, and the second embedded portion (22) is an arc block formed on the bottom surface of the arc strip. The arc block extends toward the side wall plate (11) and includes an extension portion (221) located between the arc strip and the side wall plate (11). The top surface of the extension portion (221) is an upwardly arched arc surface (2211). The arc surface (2211) and the side wall plate (11), the arc strip and the upper wall plate of the lower flow channel (152) jointly define a water flow gap (31).

6. The respirator according to claim 5, characterized in that The water flow direction in the upper flow channel (151) is defined as a first direction, and the water flow direction in the lower flow channel (152) is defined as a second direction. The water flow channel (3) further comprises a contraction channel (30) and an expansion channel (32) sequentially arranged along the second direction. The water flow gap (31) is located between the contraction channel (30) and the expansion channel (32), and connects the contraction channel (30) and the expansion channel (32). The cross-sectional area of ​​the contraction channel (30) gradually decreases along the second direction, and the cross-sectional areas of at least a portion of the water flow gap (31) and the expansion channel (32) gradually increase along the second direction.

7. The respirator according to claim 1, wherein The interior of the housing (1) defines a sewage chamber (16), and a sewage inlet (160) and a sewage outlet (163) are provided at the lower portion of the housing (1), both of which are in communication with the sewage chamber (16). The sewage chamber (16) is located beside the water flow channel (15) and the breathing chamber (14), and a wall panel of the sewage chamber (16) is provided with an opening (1611) in communication with the breathing chamber (14). A baffle (162) capable of opening or closing the opening (1611) is provided in the sewage chamber (16).

8. The respirator according to claim 7, wherein The interior of the shell (1) defines a water storage chamber (17) for storing residual water in the washing chamber. The lower portion of the shell (1) is provided with a water outlet (171) connected to the water storage chamber (17). The water flow channel (15) is at least partially located between the sewage chamber (16) and the water storage chamber (17).

9. The respirator according to any one of claims 1 to 8, characterized in that The exhaust port (121) is located on the top wall plate (12) of the shell (1), and an upwardly extending air guide duct (5) is provided at the exhaust port (121).

10. A dishwasher comprising a housing and a breather, wherein the interior of the housing defines a washing chamber, and the breather is provided on the outer wall surface of a side wall plate (11) of the housing, characterized in that: The respirator is the respirator according to any one of claims 1 to 9.

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