Anti-siphon anti-backflow drainage system of dish washing machine

Abstract

An anti-siphon anti-backflow drainage system of a dish-washing machine comprises a drainage pipeline connected with an inner container and a drainer, a drainage channel is arranged in the drainer, a respirator is arranged on the drainer, and an air inlet communicated with the outside atmosphere, a first air inlet channel and a first steam channel are formed in the respirator. The drainage pipeline, the first steam channel and the drainage channel are sequentially communicated to form a drainage water channel, and the air inlet, the first air inlet channel and the first steam channel are sequentially communicated to form a first air suction channel; when the drainage waterway drains water, external atmosphere reaches the drainage waterway through the first suction air path. According to the anti-siphon and anti-backflow drainage system, the air inlet communicated with the outside atmosphere, the first air inlet channel and the first water and air channel are formed in the respirator, the first air suction channel is formed, when the drainage waterway drains water, the outside atmosphere reaches the drainage waterway through the first air suction channel, namely air suction is carried out when drainage is carried out, and it is guaranteed that air pressure is balanced when the drainage waterway is communicated with the atmosphere; and the siphon effect is further prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and particularly relates to an anti-siphon and anti-backflow drainage system for a dishwasher. Background Art

[0002] When a dishwasher drains water, negative pressure is likely to be formed in the drainage pipe, which may cause water to flow back into the inner tank through the drainage pipe, that is, the siphon effect, resulting in problems such as unsmooth drainage and incomplete cleaning. In addition, when the dishwasher fills water, negative pressure is also likely to be formed in the water inlet pipe, which may cause water to flow back into the water inlet pipeline, that is, the siphon effect, resulting in problems such as unsmooth water inlet and inability of water to enter the inner tank; some dishwashers are provided with anti-siphon valves in the drainage pipe and the water inlet pipe. When negative pressure is formed in the pipe, the valve will automatically close to prevent water from flowing back, but the anti-siphon valve is likely to fail after long-term use and cannot automatically close.

[0003] Therefore, it is necessary to make further improvements. Summary of the Invention

[0004] The purpose of the present invention is to provide an anti-siphon and anti-backflow drainage system for a dishwasher with simple structure, good anti-siphon effect, effective prevention of backflow phenomenon, long service life and strong practicability, so as to overcome the deficiencies of the prior art.

[0005] An anti-siphon and anti-backflow drainage system for a dishwasher designed according to this purpose is characterized in that: it includes a drainage pipeline connected to the inner tank and a drainer. A drainage channel is arranged in the drainer, a breather is arranged on the drainer, and an air inlet communicating with the outside atmosphere, a first air inlet channel and a first water-air channel are arranged on the breather. The drainage pipeline, the first water-air channel and the drainage channel are connected in sequence to form a drainage water path, and the air inlet, the first air inlet channel and the first water-air channel are connected in sequence to form a first suction air path; when the drainage water path drains water, the outside atmosphere reaches the drainage water path through the first suction air path.

[0006] A water softener is arranged on the drainer, a water inlet pipeline is arranged on the side of the water softener, and a second water-air channel, a water inlet channel and a resin cavity are arranged on the water softener. The water inlet pipeline, the second water-air channel, the water inlet channel, the resin cavity and the inner tank are connected in sequence to form a water inlet water path, and a second air inlet channel is arranged on the breather. The air inlet, the second air inlet channel and the second water-air channel are connected in sequence to form a second suction air path; when the water inlet water path fills water, the outside atmosphere reaches the water inlet water path through the second suction air path.

[0007] The drainage pipeline includes a first drainage pipeline and a second drainage pipeline. The inner tank, the first drainage pipeline, the second drainage pipeline, and the first water-gas channel are connected in sequence. The second drainage pipeline is vertically arranged above the first drainage pipeline, and a check valve ball is arranged inside the second drainage pipeline. When the drainage waterway drains water, the drainage water pressure lifts the check valve ball to open the second drainage pipeline. When the drainage waterway stops draining water, the check valve ball falls downward under the action of gravity to block the second drainage pipeline.

[0008] A swingable valve piece is arranged on the air inlet. The valve piece is inclined. The valve piece closes the air inlet in the undetermined state, and the valve piece swings upward under the action of the external atmosphere to open the air inlet.

[0009] The first air inlet channel includes a first air duct and a second air duct. A first ball valve is arranged on the second air duct. When the first air suction air path intakes air, the air pressure pushes the first ball valve downward to open the second air duct. The air inlet, the first air duct, the second air duct, and the first water-gas channel are connected in sequence. When the first air suction air path stops intaking air, the first ball valve resets upward under the action of elastic force to block the second air duct. The second air inlet channel includes a third air duct and a fourth air duct. A second ball valve is arranged on the fourth air duct. When the second air suction air path intakes air, the air pressure pushes the second ball valve downward to open the fourth air duct. The air inlet, the third air duct, the fourth air duct, and the second water-gas channel are connected in sequence. When the second air suction air path stops intaking air, the second ball valve resets upward under the action of elastic force to block the fourth air duct.

[0010] The water inlet channel includes a washing water inlet channel and a regeneration water inlet channel. The washing water inlet channel includes a first water duct and a second water duct. The first water duct, the second water duct, and the resin cavity are connected in sequence. The regeneration water inlet channel includes a third water duct, a salt cavity, a fourth water duct, and a water duct group. The third water duct, the salt cavity, the fourth water duct, the water duct group, and the resin cavity are connected in sequence. The second water-gas channel can be switched to connect the first water duct and the third water duct.

[0011] A base is arranged at the bottom of the inner tank. The water softener is arranged inside the base. A fifth water duct is formed between the water softener and the base. An inlet is arranged on the base. The resin cavity, the fifth water duct, the inlet, and the inner tank are connected in sequence.

[0012] A drainage through-hole is arranged inside the second drainage pipeline. When the drainage water pressure lifts the check valve ball, the drainage through-hole is opened, and then the second drainage pipeline is opened. When the check valve ball falls downward under the action of gravity, the drainage through-hole is closed, and then the second drainage pipeline is blocked. A supporting part is arranged inside the second drainage pipeline. The drainage through-hole is arranged on the supporting part. When the check valve ball falls downward under the action of gravity, it is supported on the supporting part.

[0013] A water collecting cup communicating with the inner container is arranged at the bottom of the inner container. A drain outlet is arranged on the side of the water collecting cup. The head end of the first drain pipeline is connected to the drain outlet. A drain pump is arranged on the drain outlet. The water inlet end of the drain pump communicates with the inner container, and the water outlet end of the drain pump communicates with the first drain pipeline.

[0014] The water inlet pipeline includes a water inlet pipe and a water inlet cavity. The water inlet pipe, the water inlet cavity and the second water and gas channel are communicated in sequence. A flow meter is arranged in the water inlet cavity; a drain pipe is arranged at the bottom of the drainer, and the drain channel communicates with the drain pipe.

[0015] The anti-siphon and anti-backflow drainage system of the present invention forms a first suction air path by arranging an air inlet communicating with the outside atmosphere, a first air inlet channel and a first water and gas channel on the breather. When the drainage water path drains water, the outside atmosphere reaches the drainage water path through the first suction air path, that is, it sucks air while draining water, ensuring air pressure balance with the atmosphere connected, preventing negative pressure from occurring in the drainage water path, and thus preventing the siphon effect; similarly, by arranging a second air inlet channel on the breather and a second water and gas channel on the water softener, a second suction air path is formed. When the water inlet water path intakes water, the outside atmosphere reaches the water inlet water path through the second suction air path, that is, it sucks air while intaking water, ensuring air pressure balance with the atmosphere connected, preventing negative pressure from occurring in the water inlet water path, and thus preventing the siphon effect; the above structure uses the first suction air path and the second suction air path to replace the traditional anti-siphon valve, which can avoid the problem that the anti-siphon valve is prone to failure after long-term use. Description of the Drawings

[0016] Figures 1 - 5 It is a cross-sectional view of the dishwasher in different orientations in an embodiment of the present invention.

[0017] Figure 6 It is a schematic diagram of the overall structure of the dishwasher in an embodiment of the present invention.

[0018] Figure 7 It is a schematic diagram of a partial structure of the dishwasher in an embodiment of the present invention.

[0019] Figure 8 It is a cross-sectional view of the drainer in an embodiment of the present invention.

[0020] Figure 9 It is a cross-sectional view of the drainer in another orientation in an embodiment of the present invention.

[0021] Figure 10 It is Figure 4 an enlarged schematic diagram of the structure at A in

[0022] Figure 11 It is a side view of the drainer in an embodiment of the present invention.

[0023] Figure 12 It is a schematic diagram of a partial structure of the dishwasher in another orientation in an embodiment of the present invention.

[0024] Figure 13 This is a schematic diagram of the overall structure of the drainer in an embodiment of the present invention.

[0025] Figure 14 This is a schematic diagram of the overall structure of the drainer in another orientation in an embodiment of the present invention. Detailed implementation manners

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Refer to Figures 1 - 14 , the anti-siphon and anti-backflow drainage system of this dishwasher includes a drainage pipeline connected to the inner tank 1 and a drainer 2. A drainage channel 3 is provided in the drainer 2. A breather 4 is provided on the drainer 2. An air inlet 54 communicating with the outside atmosphere, a first air intake channel 5, and a first water-vapor channel 6 are provided on the breather 4. The drainage pipeline, the first water-vapor channel 6, and the drainage channel 3 are connected in sequence to form a drainage water path. The air inlet 54, the first air intake channel 5, and the first water-vapor channel 6 are connected in sequence to form a first suction air path, that is, the first suction air path communicates with the drainage water path; when the drainage water path drains water, the outside atmosphere reaches the drainage water path through the first suction air path.

[0028] A water softener 7 is provided on the drainer 2. A water inlet pipeline 8 is provided on the side of the water softener 7. A second water-vapor channel 9, a water inlet channel, and a resin chamber 10 are provided on the water softener 7. The water inlet pipeline 8, the second water-vapor channel 9, the water inlet channel, the resin chamber 10, and the inner tank 1 are connected in sequence to form a water inlet water path. A second air intake channel 11 is provided on the breather 4. The air inlet 54, the second air intake channel 11, and the second water-vapor channel 9 are connected in sequence to form a second suction air path, that is, the second suction air path communicates with the water inlet water path; when the water inlet water path intakes water, the outside atmosphere reaches the water inlet water path through the second suction air path.

[0029] The solid arrows in the figure represent the drainage water path and the water inlet water path, and the dashed arrows represent the first suction air path and the second suction air path.

[0030] The water softener 7 and the breather 4 are integrally provided. The breather 4 is located above the water softener 7 and on one side of the inner tank 1.

[0031] The drain pipe includes a first drain pipe 12 and a second drain pipe 13. The inner tank 1, the first drain pipe 12, the second drain pipe 13, and the first water-gas channel 6 are connected in sequence. The second drain pipe 13 is vertically arranged above the first drain pipe 12, and a check valve ball 14 is arranged inside the second drain pipe 13. When the drain water path drains water, the drain water pressure lifts the check valve ball 14 to open the second drain pipe 13. When the drain water path stops draining water, the check valve ball 14 falls downward under the action of gravity to block the second drain pipe 13, thereby realizing anti-backflow. This structure uses the gravity of the check valve ball 14 to block the drain pipe, and the blocking effect is good, effectively preventing the water on the drain pipe from flowing back.

[0032] A swingable valve plate 15 is arranged on the air inlet 54. The valve plate 15 is inclined. The valve plate 15 closes the air inlet 54 in the undetermined state. The valve plate 15 swings upward under the action of the external atmosphere to open the air inlet 54, that is, when the external atmosphere enters the breather 4 through the air inlet 54, it acts on the valve plate 15 to make the valve plate 15 swing upward. When the breather 4 stops admitting air, the valve plate 15 swings downward under the action of its own gravity to re-close the air inlet 54.

[0033] A convex block 39 is arranged above the air inlet 54 on the breather 4. A rotating hole 40 is arranged at the upper end of the valve plate 15. The valve plate 15 is swingably arranged on the breather 4 through the cooperation of the rotating hole 40 and the convex block 39.

[0034] The first air inlet channel 5 includes a first air duct 16 and a second air duct 17. A first ball valve 18 is arranged on the second air duct 17. When the first intake air path intakes air, the air pressure pushes down the first ball valve 18 to open the second air duct 17. The air inlet 54, the first air duct 16, the second air duct 17, and the first water-gas channel 6 are connected in sequence. When the first intake air path stops intaking air, the first ball valve 18 resets upward under the action of elastic force to block the second air duct 17, which can prevent the water flow from flowing back to the first air duct 16 through the second air duct 17 during drainage, and then flowing out of the breather 4 through the air inlet 54. The second air inlet channel 11 includes a third air duct 19 and a fourth air duct 20. A second ball valve 21 is arranged on the fourth air duct 20. When the second intake air path intakes air, the air pressure pushes down the second ball valve 21 to open the fourth air duct 20. The air inlet 54, the third air duct 19, the fourth air duct 20, and the second water-gas channel 9 are connected in sequence. When the second intake air path stops intaking air, the second ball valve 21 resets upward under the action of elastic force to block the fourth air duct 20, which can prevent the water flow from flowing back to the third air duct 19 through the fourth air duct 20 during water inlet, and then flowing out of the breather 4 through the air inlet 54.

[0035] A first through-hole 41 is provided between the first air duct 16 and the second air duct 17. When the air pressure pushes down the first ball valve 18 to open the first through-hole 41, the second air duct 17 is opened. When the first ball valve 18 resets upward under the action of elastic force, the first through-hole 41 is closed, and thus the second air duct 17 is blocked. A first spring 42 is provided between the first ball valve 18 and the respirator 4, and the first ball valve 18 resets upward under the elastic force of the first spring 42.

[0036] A second through-hole 43 is provided between the third air duct 19 and the fourth air duct 20. When the air pressure pushes down the second ball valve 21 to open the second through-hole 43, the fourth air duct 20 is opened. When the second ball valve 21 resets upward under the action of elastic force, the second through-hole 43 is closed, and thus the fourth air duct 20 is blocked. A second spring 44 is provided between the second ball valve 21 and the respirator 4, and the second ball valve 21 resets upward under the elastic force of the second spring 44.

[0037] The water inlet channel includes a washing water inlet channel and a regeneration water inlet channel. The washing water inlet channel includes a first water channel 22 and a second water channel 23, and the first water channel 22, the second water channel 23 and the resin chamber 10 are connected in sequence. The regeneration water inlet channel includes a third water channel 24, a salt chamber 25, a fourth water channel 26 and a water channel group, and the third water channel 24, the salt chamber 25, the fourth water channel 26, the water channel group and the resin chamber 10 are connected in sequence. The second water-vapor channel 9 can be switched to communicate with the first water channel 22 and the third water channel 24. When the second water-vapor channel 9 communicates with the first water channel 22, the dishwasher normally intakes water. When the second water-vapor channel 9 communicates with the third water channel 24, the resin is regenerated with brine.

[0038] The water channel group includes a sixth water channel 45, a seventh water channel 46 and an eighth water channel 47 which are arranged in a zigzag shape up and down, and the fourth water channel 26, the sixth water channel 45, the seventh water channel 46, the eighth water channel 47 and the resin chamber 10 are connected in sequence.

[0039] A solenoid valve 48 is provided on the water softener 7, and a movable head 49 is provided on the solenoid valve 48. The movable head 49 moves between the first water channel 22 and the third water channel 24 to switch the communication of the second water-vapor channel 9 between the first water channel 22 and the third water channel 24. When normal water intake is required, the solenoid valve 48 switches the second water-vapor channel 9 to communicate with the first water channel 22. When resin regeneration is required, the solenoid valve 48 switches the second water-vapor channel 9 to communicate with the third water channel 24. The working principles of the solenoid valve 48 and the movable head 49 are prior arts and will not be elaborated here.

[0040] A base 37 is provided at the bottom of the inner tank 1, the water softener 7 is arranged in the base 37, a fifth water channel 38 is formed between the water softener 7 and the base 37, a water inlet 27 is provided on the base 37, and the resin chamber 10, the fifth water channel 38, the water inlet 27 and the inner tank 1 are connected in sequence.

[0041] A drain through hole 28 is provided inside the second drain pipe 13; when the drain water pressure jacks up the check valve ball 14, the drain through hole 28 is opened, and then the second drain pipe 13 is opened; when the check valve ball 14 falls downward under the action of gravity, the drain through hole 28 is closed, and then the second drain pipe 13 is blocked.

[0042] A support portion 29 is provided inside the second drain pipe 13, the drain through hole 28 is provided on the support portion 29, and when the check valve ball 14 falls downward under the action of gravity, it is supported on the support portion 29, thereby closing the drain through hole 28.

[0043] The cross-sectional shape of the support portion 29 is in an inverted V shape, which can improve the support effect on the check valve ball 14.

[0044] The first drain pipe 12 is horizontally arranged transversely, and the first drain pipe 12 is perpendicular to the second drain pipe 13.

[0045] A water collecting cup 30 communicating with the inner tank 1 is provided at the bottom of the inner tank 1, a drain port 31 is provided on the side of the water collecting cup 30, the drain port 31 communicates with the water collecting cup 30, the head end of the first drain pipe 12 is connected to the drain port 31, the tail end is connected to the head end of the second drain pipe 13, the tail end of the second drain pipe 13 is connected to the drainer 2, a drain pump 32 is provided on the drain port 31, the water inlet end of the drain pump 32 communicates with the inner tank 1, the water outlet end of the drain pump 32 communicates with the first drain pipe 12, when the drain pump 32 works, the water in the inner tank 1 is discharged from the dishwasher through the drain water path; the first drain pipe 12 and the second drain pipe 13 are integrally provided on the water collecting cup 30.

[0046] The water inlet pipe 8 includes a water inlet pipe 33 and a water inlet cavity 34, the water inlet pipe 33, the water inlet cavity 34 and the second water and gas channel 9 are sequentially communicated, and a flow meter 35 is provided inside the water inlet cavity 34; a drain pipe 36 is provided at the bottom of the drainer 2 (water softener 7), and the drain channel 3 communicates with the drain pipe 36; a water inlet pump 50 is provided at one end of the water inlet pipe 33, and when the water inlet pump 50 works, external tap water enters the inner tank 1 through the water inlet water path.

[0047] A first channel 51 is formed between the water softener 7 and the base 37, a second channel 52 is provided on the breather 4, the second drain pipe 13, the first channel 51, the second channel 52 and the first water and gas channel 6 are sequentially communicated, the second channel 52 and the first water and gas channel 6 are arranged in an up-and-down meandering manner, the first channel 51 is horizontally arranged above the second drain pipe 13, the second channel 52 and the first water and gas channel 6 are vertically arranged above the first channel 51, and the drain channel 3 is arranged below the second channel 52 and the first water and gas channel 6, so that the drain first passes through the bottom and then winds to the upper part and then returns to the bottom; the drain channel 3 is arranged inside the water softener 7.

[0048] A third channel 53 is provided on the water softener 7, and the second air inlet channel 11 (the fourth air duct 20), the third channel 53, and the second water-vapor channel 9 are connected in sequence.

[0049] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-siphon and anti-backflow drainage system for a dishwasher, characterized in that: The invention comprises a drainage pipeline connected to an inner tank (1) and a drainer (2); a drainage channel (3) is arranged in the drainer (2); a respirator (4) is arranged on the drainer (2); an air inlet (54) connected to the outside atmosphere, a first air inlet channel (5), and a first water vapor channel (6) are arranged on the respirator (4); the drainage pipeline, the first water vapor channel (6) and the drainage channel (3) are connected in sequence to form a drainage waterway; the air inlet (54), the first air inlet channel (5) and the first water vapor channel (6) are connected in sequence to form a first air intake channel; when the drainage waterway is draining water, the outside atmosphere reaches the drainage waterway through the first air intake channel.

2. The anti-siphon and anti-backflow drainage system for a dishwasher according to claim 1, characterized in that: A water softener (7) is arranged on the drainer (2), a water inlet pipeline (8) is arranged on the side of the water softener (7), a second water vapor channel (9), a water inlet channel and a resin chamber (10) are arranged on the water softener (7), the water inlet pipeline (8), the second water vapor channel (9), the water inlet channel, the resin chamber (10) and the inner tank (1) are connected in sequence to form a water inlet waterway, a second air inlet channel (11) is arranged on the respirator (4), the air inlet port (54), the second air inlet channel (11) and the second water vapor channel (9) are connected in sequence to form a second air inhalation airway; when water is introduced into the water inlet waterway, the outside air reaches the water inlet waterway through the second air inhalation airway.

3. The anti-siphon and anti-backflow drainage system of a dishwasher according to claim 2, characterized in that: The drainage pipeline comprises a first drainage pipeline (12) and a second drainage pipeline (13); the inner tank (1), the first drainage pipeline (12), the second drainage pipeline (13) and the first water-gas channel (6) are connected in sequence; the second drainage pipeline (13) is vertically arranged above the first drainage pipeline (12); a one-way valve ball (14) is arranged inside the second drainage pipeline (13); when the drainage waterway is draining, the drainage water pressure lifts up the one-way valve ball (14) to open the second drainage pipeline (13); when the drainage waterway stops draining, the one-way valve ball (14) falls downward under the action of gravity to block the second drainage pipeline (13).

4. The anti-siphon and anti-backflow drainage system for a dishwasher according to claim 2, characterized in that: A swingable valve plate (15) is provided on the air inlet (54). The valve plate (15) is tilted and closes the air inlet (54) in a waiting state. The valve plate (15) swings upward under the action of the outside atmosphere to open the air inlet (54).

5. The anti-siphon and anti-backflow drainage system for a dishwasher according to claim 2, characterized in that: The first air intake passage (5) comprises a first air passage (16) and a second air passage (17), and a first ball valve (18) is arranged on the second air passage (17). When air is taken in by the first air intake passage, air pressure pushes the first ball valve (18) downward to open the second air passage (17), and the air intake port (54), the first air passage (16), the second air passage (17) and the first water vapor passage (6) are connected in sequence. When air is stopped from being taken in by the first air intake passage, the first ball valve (18) is reset upward under the action of elastic force to block the second air passage (17).

6. The anti-siphon and anti-backflow drainage system for a dishwasher according to claim 5, characterized in that: The second air intake passage (11) comprises a third air passage (19) and a fourth air passage (20), and a second ball valve (21) is arranged on the fourth air passage (20). When air is taken in by the second air intake passage, air pressure pushes the second ball valve (21) downward to open the fourth air passage (20), and the air intake port (54), the third air passage (19), the fourth air passage (20) and the second water vapor passage (9) are connected in sequence. When air is stopped from being taken in by the second air intake passage, the second ball valve (21) is reset upward under the action of elastic force to block the fourth air passage (20).

7. The anti-siphon and anti-backflow drainage system for a dishwasher according to claim 2, characterized in that: The water inlet channel includes a washing water inlet channel and a regeneration water inlet channel; The washing water inlet channel comprises a first water channel (22) and a second water channel (23), and the first water channel (22), the second water channel (23) and the resin chamber (10) are connected in sequence; The regeneration water inlet channel comprises a third water channel (24), a salt cavity (25), a fourth water channel (26) and a water channel group, and the third water channel (24), the salt cavity (25), the fourth water channel (26), the water channel group and the resin cavity (10) are sequentially connected; The second water gas channel (9) can switchably connect the first water channel (22) and the third water channel (24).

8. The anti-siphon and anti-backflow drainage system for a dishwasher according to claim 7, characterized in that: A base (37) is provided at the bottom of the inner tank (1), a water softener (7) is provided in the base (37), a fifth water channel (38) is formed between the water softener (7) and the base (37), a water inlet (27) is provided on the base (37), and the resin cavity (10), the fifth water channel (38), the water inlet (27) and the inner tank (1) are sequentially connected.

9. The anti-siphon and anti-backflow drainage system for a dishwasher according to claim 3, characterized in that: The second drainage pipeline (13) is provided with a drainage through hole (28) inside; when the drainage water pressure lifts up the one-way valve ball (14), the drainage through hole (28) is opened, thereby opening the second drainage pipeline (13); when the one-way valve ball (14) falls downward under the action of gravity, the drainage through hole (28) is closed, thereby blocking the second drainage pipeline (13); A support portion (29) is provided inside the second drainage pipeline (13), the drainage through hole (28) is provided on the support portion (29), and the one-way valve ball (14) is supported on the support portion (29) when falling downward under the action of gravity.

10. The anti-siphon and anti-backflow drainage system of a dishwasher according to claim 9, characterized in that: A water collecting cup (30) connected to the inner liner (1) is arranged at the bottom of the inner liner (1), a drainage port (31) is arranged on the side of the water collecting cup (30), a head end of the first drainage pipeline (12) is connected to the drainage port (31), a drainage pump (32) is arranged on the drainage port (31), a water inlet end of the drainage pump (32) is connected to the inner liner (1), and a water outlet end of the drainage pump (32) is connected to the first drainage pipeline (12); The water inlet pipeline (8) comprises a water inlet pipe (33) and a water inlet chamber (34); the water inlet pipe (33), the water inlet chamber (34) and the second water vapor channel (9) are connected in sequence; a flow meter (35) is arranged in the water inlet chamber (34); a drainage pipe (36) is arranged at the bottom of the drainer (2); and the drainage channel (3) is connected to the drainage pipe (36).

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