Washing equipment

Abstract

The utility model relates to washing equipment, the washing equipment includes: cylinder body subassembly, put box subassembly and circulation subassembly, the cylinder body subassembly is equipped with the washing chamber, put box subassembly includes put box and put spray header, put spray header is provided on the cylinder body subassembly, put box subassembly is equipped with the circulation subassembly, put box subassembly is equipped with the circulation subassembly, put box subassembly is equipped with the circulation subassembly, put box subassembly is equipped with the circulation subassembly. The feeding box is communicated with the washing cavity through the feeding spraying head, the circulating assembly comprises a water drainage pipe, a circulating pump and a circulating pipe, one end of the water drainage pipe is communicated with the washing cavity, the other end of the water drainage pipe is communicated with an inlet of the circulating pump, an outlet of the circulating pump is communicated with one end of the circulating pipe, and the other end of the circulating pipe is communicated with the feeding box. And the other end of the circulating pipe is communicated with the feeding spray head. According to the washing equipment, the utilization rate of the detergent can be improved, and the washing capacity of the washing equipment can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, specifically, a kind of washing equipment. BACKGROUND

[0002] With the continuous development of technology, for example, the development of washing equipment such as washing machine, dishwasher, etc. on the basis of meeting people's basic washing requirements, more and more attention is paid to improving the washing capacity of washing equipment. SUMMARY

[0003] The utility model aims at at least one of the technical problems in the related art.

[0004] To this end, an embodiment of the utility model provides a kind of washing equipment.

[0005] The washing equipment of the embodiment of the utility model includes: cylinder assembly, the washing cavity is equipped in the cylinder assembly;Drop box assembly, the drop box assembly includes drop box and drop spray head, the drop spray head is set on the cylinder assembly, the drop box is communicated with the washing cavity by the drop spray head;Circulation assembly, the circulation assembly includes drain pipe, circulation pump and circulation pipe, one end of the drain pipe is communicated with the washing cavity, the other end of the drain pipe is communicated with the inlet of the circulation pump, the outlet of the circulation pump is communicated with one end of the circulation pipe, the other end of the circulation pipe is communicated with the drop spray head.

[0006] The washing equipment of the embodiment of the utility model at least has following technical effect one of:

[0007] 1. can improve the utilization of detergent, improve the washing capacity of washing equipment. When washing equipment is in washing stage, circulation pump can transport the water containing detergent in drain pipe back to washing cavity through circulation pipe and drop spray head, to improve the utilization of detergent, so as to improve the washing capacity of washing equipment.

[0008] 2. can simplify the structure of washing equipment. Since drop box and circulation pipe share a drop spray head, the number of spray heads used can be reduced, and the complexity of pipe system and installation cost are reduced.

[0009] 3. can enhance the stability of washing equipment. Since drop box and circulation pipe share a drop spray head, fluid pressure fluctuation and leakage risk that may be caused by secondary opening on washing cavity can be avoided, which is conducive to guaranteeing the spraying effect and stability of washing equipment.

[0010] 4. The flexibility of the washing device in use can be improved. The single dosing spray head can spray the liquid from the dosing box to the washing cavity in one working stage, such as the detergent dosing stage, and can spray the liquid from the circulation pipe to the washing cavity in another working stage, such as the washing stage; the single dosing spray head can also spray the mixture of the liquid from the dosing box and the liquid from the circulation pipe to the washing cavity, so as to meet the diversified use requirements of the washing device and improve the flexibility of the washing device in use.

[0011] In some embodiments, the dosing box assembly comprises a tee and a first water pipe, the tee has a first port, a second port and a third port, one end of the first water pipe communicates with the dosing box, the other end of the first water pipe communicates with the first port, the other end of the circulation pipe communicates with the second port, and the third port communicates with the dosing spray head.

[0012] In some embodiments, the tee and the spray head communicate in one of the following ways: the third port directly communicates with the dosing spray head to form a tee spray structure, the tee spray structure comprises a first pipe segment and a second pipe segment, the first port and the third port are respectively arranged at two ends of the first pipe segment, one end of the second pipe segment communicates with the first pipe segment, the other end of the second pipe segment constitutes the second port, the first pipe segment and the axis of the dosing spray head form an included angle M, and the included angle M is an obtuse angle; the dosing box assembly further comprises a second water pipe, the third port communicates with the dosing spray head through the second water pipe, and the second water pipe and the axis of the dosing spray head form an included angle M, and the included angle M is an obtuse angle.

[0013] In some embodiments, the washing device further comprises a first one-way valve arranged upstream of the first port, the first one-way valve only allows the liquid in the dosing box to be unidirectionally introduced into the first port; and / or, the washing device further comprises a second one-way valve arranged upstream of the second port, the second one-way valve only allows the liquid flowed out of the circulation pump to be unidirectionally introduced into the second port.

[0014] In some embodiments, the first one-way valve and the tee communicate in one of the following ways: the first one-way valve is arranged between the first water pipe and the first port; the first one-way valve is arranged in the first water pipe, and the first water pipe and the first port are connected.

[0015] In some embodiments, the second one-way valve and the tee communicate in one of the following ways: the second one-way valve is arranged between the circulation pipe and the second port; the second one-way valve is arranged in the circulation pipe, and the circulation pipe and the second port are connected.

[0016] In some embodiments, the first one-way valve and the second one-way valve are in direct communication with the tee, forming a one-way valve tee structure, the one-way valve tee structure comprising: a first pipe segment and a second pipe segment, the first port and the third port being arranged at two ends of the first pipe segment respectively, one end of the second pipe segment being in communication with the first pipe segment, the other end of the second pipe segment constituting the second port, the first one-way valve being located at the first port, and the second one-way valve being located at the second port.

[0017] In some embodiments, the third port is in direct communication with the dosing shower head, an included angle M is formed between the first pipe segment and an axis of the dosing shower head, the included angle M is an obtuse angle, an axis of the first one-way valve is collinear with an axis of the first pipe segment, and an axis of the second one-way valve is collinear with an axis of the second pipe segment.

[0018] In some embodiments, the cartridge assembly comprises an outer cartridge, an inner cartridge, and a door seal, the inner cartridge being rotatably arranged in the outer cartridge, the door seal being arranged at an open position of the outer cartridge, and the dosing shower head being arranged on the door seal.

[0019] In some embodiments, the dosing box assembly comprises a dosing box and a suction member, a water tank for dosing detergent being arranged in the dosing box, the suction member comprising a lumen, a water inlet, a water outlet, and a suction passage, the water inlet and the water outlet being arranged at two ends of the lumen respectively, the water outlet being in communication with the dosing shower head, the suction passage comprising a tapered segment, the water tank, the tapered segment, and the lumen being sequentially in communication, and an inner diameter of the tapered segment gradually decreasing in a direction towards the lumen.

[0020] In some embodiments, the suction passage further comprises a straight pipe segment, the water tank, the tapered segment, the straight pipe segment, and the lumen being sequentially in communication, an inner diameter of the straight pipe segment being constant, an axial dimension of the tapered segment being H1, and an axial dimension of the straight pipe segment being H2, wherein 0.1≤H2 / H1≤0.3.

[0021] In some embodiments, an included angle between an inner wall surface of the tapered segment and an axis of the tapered segment is α, wherein 12°≤α≤20°.

[0022] In some embodiments, the lumen comprises an inlet segment, a converging segment, a throat segment, and a diffuser segment, the inlet segment, the converging segment, the throat segment, and the diffuser segment being sequentially in communication in a direction from the water inlet to the water outlet, the water inlet being arranged at the inlet segment and the water outlet being arranged at the diffuser segment, an inner diameter of the converging segment gradually decreasing in the direction from the water inlet to the water outlet, and the suction passage being arranged at a side of the diffuser segment adjacent to the throat segment.

[0023] In some embodiments, the size of the lumen is set in at least one of the following ways: the angle between the inner wall surface of the contraction section and the axis of the contraction section is β, wherein 7°≤β≤10°; the angle between the inner wall surface of the diffuser section and the axis of the contraction section is γ, wherein 8°≤γ≤15°; the length of the throat section is L1, and the inner diameter of the throat section is φ1, wherein 1.1≤L1 / φ1≤1.5; the inner diameter of the throat section is φ1, and the inner diameter of the end of the diffuser section adjacent to the throat section is φ3, wherein 1.5≤φ3 / φ1≤1.7.

[0024] In some embodiments, the suction member further comprises a pressure relief channel in communication with the lumen, the sink is provided with a pressure relief opening, the dispensing box assembly further comprises a pressure relief valve, the pressure relief valve is arranged between the pressure relief opening and the pressure relief channel, when the pressure in the lumen exceeds a preset value, the pressure relief valve is opened to communicate the lumen with the sink.

[0025] In some embodiments, the dispensing box has a stop surface, at least part of the pressure relief opening is arranged opposite to the stop surface.

[0026] In some embodiments, the dispensing box comprises a side wall plate and a surrounding part, the side wall plate has a recess, the recess and the surrounding part are arranged on the two sides of the pressure relief opening in the radial direction respectively, and the stop surface is arranged on the top wall surface of the recess. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of a washing equipment according to an embodiment of the present application.

[0028] Figure 2 is a schematic view of the inside of a washing equipment according to a first embodiment of the present application.

[0029] Figure 3 is a schematic view of a circulation assembly of a washing equipment according to a first embodiment of the present application.

[0030] Figure 4 is a schematic view of some parts of a washing equipment according to a first embodiment of the present application.

[0031] Figure 5 is a schematic view of the inside of a washing equipment according to a second embodiment of the present application.

[0032] Figure 6 is a schematic view of the connection between a dispensing spray head and a tee of a washing equipment according to a second embodiment of the present application.

[0033] Figure 7 is a schematic view of the inside of a washing equipment according to a third embodiment of the present application.

[0034] Figure 8A is a connection schematic view of the tee piece, the first one-way valve and the second one-way valve of the washing equipment of the third embodiment of the utility model.

[0035] Figure 8B is a connection schematic view of the dropping spray head, the tee piece, the first one-way valve and the second one-way valve of the washing equipment of the fourth embodiment of the utility model.

[0036] Figure 9 is a perspective view of the dropping box assembly of the washing equipment of the embodiment of the utility model.

[0037] Figure 10 is a bottom view of the dropping box assembly of the washing equipment of the embodiment of the utility model.

[0038] Figure 11 is a sectional view of the dropping box assembly of the washing equipment of the embodiment of the utility model.

[0039] Figure 12 is Figure 11 the enlarged view of A in the middle.

[0040] Figure 13 is a schematic view of the suction piece and the pressure relief valve of the washing equipment of the embodiment of the utility model.

[0041] Figure 14 is a schematic view of the suction piece of the washing equipment of the embodiment of the utility model.

[0042] Figure 15 is a sectional view of the suction piece of the washing equipment of the embodiment of the utility model.

[0043] Figure 16 is a schematic view of the suction piece of the washing equipment of another embodiment of the utility model.

[0044] Figure 17 is a schematic view of the dropping box of the washing equipment of the embodiment of the utility model.

[0045] Reference signs:

[0046] 100, washing equipment;

[0047] 1, cylinder assembly; 11, washing cavity; 12, outer cylinder; 13, inner cylinder; 14, door seal;

[0048] 2, the delivery box assembly; 21, the delivery box; 211, the sink; 212, the pressure relief opening; 213, the side wall plate; 2131, the recess; 2132, the stop face; 214, the negative pressure opening; 215, the discharge port; 216, the fence part; 22, the delivery spray head; 23, the door bowl spray head; 24, the tee; 241, the first port; 242, the second port; 243, the third port; 244, the first pipe section; 245, the second pipe section; 25, the first water pipe; 26, the second water pipe; 27, the suction member; 271, the lumen; 2711, the inlet section; 2712, the constriction section; 2713, the throat section; 2714, the diffuser section; 272, the water inlet; 273, the water outlet; 274, the suction passage; 2741, the tapered section; 2742, the straight pipe section; 275, the pressure relief passage; 28, the pressure relief valve; 29, the water inlet pipe;

[0049] 3, the circulation assembly; 31, the drain pipe; 32, the circulation pump; 321, the water inlet pump port; 322, the drain port; 323, the circulation port; 33, the circulation pipe;

[0050] 41, the first one-way valve; 42, the second one-way valve;

[0051] 5, the washing machine door. DETAILED DESCRIPTION

[0052] The embodiments of the present application are described in detail below, examples of which are shown in the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0053] The following refers to the accompanying Figures 1 to 17 The washing equipment of the embodiments of the present application is described.

[0054] As Figures 1 to 4 shown, the washing equipment of the embodiments of the present application comprises a drum assembly 1, a delivery box assembly 2 and a circulation assembly 3. The drum assembly 1 is provided with a washing cavity 11, the delivery box assembly 2 comprises a delivery box 21 and a delivery spray head 22, the delivery spray head 22 is arranged on the drum assembly 1, the delivery box 21 is communicated with the washing cavity 11 through the delivery spray head 22, the circulation assembly 3 comprises a drain pipe 31, a circulation pump 32 and a circulation pipe 33, one end of the drain pipe 31 is communicated with the washing cavity 11, the other end of the drain pipe 31 is communicated with the inlet of the circulation pump 32, the outlet of the circulation pump 32 is communicated with one end of the circulation pipe 33, the other end of the circulation pipe 33 is communicated with the delivery spray head 22.

[0055] The washing equipment of the embodiments of the present application has at least one of the following technical effects:

[0056] 1. The utilization of the detergent can be improved, and the washing capacity of the washing equipment can be improved. When the washing equipment is in the washing stage, the circulating pump 32 can deliver the water containing the detergent in the drain pipe 31 back to the washing cavity 11 through the circulating pipe 33 and the dispensing spray head 22, so as to improve the utilization of the detergent and improve the washing capacity of the washing equipment.

[0057] 2. The structure of the washing equipment can be simplified. Since the dispensing box 21 and the circulating pipe 33 share one dispensing spray head 22, the number of spray heads used can be reduced, and the complexity of the pipeline system and the installation cost are reduced.

[0058] It can be understood that the washing equipment in the embodiment of the utility model can be based on the original product of "cylinder assembly 1 + dispensing box 21 assembly 2", and the circulating pump 32 and the circulating pipe 33 are added, so that the washing liquid in the washing equipment can be recycled, and a group of spray heads does not need to be additionally added, that is, the cylinder assembly 1 does not need to be redesigned, which is beneficial to improve the compatibility of the product and reduce the production cost.

[0059] 3. The stability of the washing equipment can be improved. Since the dispensing box 21 and the circulating pipe 33 share one dispensing spray head 22, the fluid pressure fluctuation and the leakage risk that may be caused by the secondary opening on the washing cavity 11 can be avoided, and the spraying effect and the stability of the washing equipment can be ensured.

[0060] It can be understood that the washing equipment in the embodiment of the utility model adds the circulating pump 32 and the circulating pipe 33 on the basis of the original dispensing spray head 22, and the secondary opening on the washing cavity 11 is not needed, that is, the circulating spray head for recycling the detergent does not need to be installed again, so that the fluid and sealing design and test verification of the circulating spray head do not need to be re-performed, thereby the development cost of the washing equipment can be reduced, and the stability of the washing equipment can be improved.

[0061] 4. The flexibility of the washing equipment in use can be improved. The single dispensing spray head 22 can spray the liquid from the dispensing box to the washing cavity 11 in one working stage, for example, the detergent dispensing stage, and can spray the liquid from the circulating pipe 33 to the washing cavity 11 in another working stage, for example, the washing stage; the single dispensing spray head 22 can also spray the mixture of the liquid from the dispensing box 21 and the liquid from the circulating pipe 33 to the washing cavity 11, so that the diversified use demand of the washing equipment can be met, and the flexibility of the washing equipment in use can be improved.

[0062] It can be understood that when the washing device is in the detergent dispensing stage, the dispensing shower head 22 can guide the washing liquid in the dispensing box 21 assembly 2 into the washing cavity 11, and at this time the dispensing shower head 22 can be used to guide the washing liquid in the dispensing box 21 assembly 2. When the washing device is in the washing stage, the circulating pump 32 can transport the water containing the washing liquid in the drain pipe 31 back to the washing cavity 11 through the circulating pipe 33 and the dispensing shower head 22, and at this time the dispensing shower head 22 can flow the water in the drain pipe 31 back to the washing cavity 11.

[0063] In the example of the utility model, as shown in Figure 3 The circulating pump 32 has a water inlet pump port 321, a drain port 322 and a circulating port 323. The drain pipe 31 communicates with the circulating pump 32 through the water inlet pump port 321, the circulating pipe 33 communicates with the circulating pump 32 through the circulating port 323, and the sewage discharge pipe communicates with the circulating pump 32 through the drain port 322, that is, the circulating pump 32 can not only function as a drain pump, but also can transport the water containing the washing liquid in the drain pipe 31 to the circulating pipe 33 for recycling.

[0064] Optionally, the dispensing box assembly 2 comprises a three-way piece 24 and a first water pipe 25, the three-way piece 24 has a first port 241, a second port 242 and a third port 243, one end of the first water pipe 25 communicates with the dispensing box 21, the other end of the first water pipe 25 communicates with the first port 241, the other end of the circulating pipe 33 communicates with the second port 242, and the third port 243 communicates with the dispensing shower head 22. It can be understood that the first water pipe 25, the circulating pipe 33 and the dispensing shower head 22 can be connected through the three-way piece 24, so that the water in the first water pipe 25 and the circulating pipe 33 all flows to the dispensing shower head 22.

[0065] As shown in Figure 5 and Figure 6 The three-way piece 24 and the dispensing shower head 22 constitute a three-way shower structure, that is, the third port 243 is directly connected with the dispensing shower head 22, thereby avoiding the problem of multiple connections of the pipeline, reducing the layout length of the pipeline, reducing the pressure loss, and reducing the production cost and facilitating assembly.

[0066] Specifically, as shown in Figure 6As shown, the third port 243 is directly connected to the spray head 22 to form a three-way spray structure. The three-way spray structure includes a first pipe section 244 and a second pipe section 245. The first port 241 and the third port 243 are respectively located at both ends of the first pipe section 244. One end of the second pipe section 245 is connected to the first pipe section 244, and the other end of the second pipe section 245 forms the second port 242. There is an angle M between the axis of the first pipe section 244 and the axis of the spray head 22, and the angle M is an obtuse angle. In other words, the end of the spray head 22 away from the first pipe section 244 extends downward at a generally inclined angle. Compared with the scheme where the angle between the axis of the first pipe section 244 and the axis of the spray head 22 is a right angle or an acute angle, this application can reduce the resistance of liquid flowing into the spray head 22 and reduce the energy loss during liquid flow.

[0067] For example, such as Figure 6 As shown, the first pipe section 244 and the second pipe section 245 have an included angle, and the included angle is generally acute. This can reduce the resistance when the first pipe section 244 and the second pipe section 245 merge, and further reduce the energy loss during liquid flow.

[0068] For example, the tee fitting 24 and the spray nozzle 22 can be integrally formed; for example, the tee fitting 24 and the spray nozzle 22 can be formed separately and then assembled. Furthermore, the tee fitting 24 and the spray nozzle 22 are detachably connected.

[0069] In another example, such as Figure 4 As shown, the third port 243 is indirectly connected to the dispensing spray head 22. Specifically, the dispensing box assembly 2 also includes a second water pipe 26, one end of which is connected to the third port 243, and the other end of which is connected to the dispensing spray head 22. The second water pipe 26 and the axis of the dispensing spray head 22 form an angle M, which is an obtuse angle. This reduces the resistance to liquid flow into the dispensing spray head 22 and reduces energy loss during liquid flow.

[0070] Optionally, such as Figure 4 As shown, the washing device also includes a first one-way valve 41, which is located upstream of the first port 241. The first one-way valve 41 only allows liquid in the dispensing box 21 to be introduced into the first port 241 in one direction. It can be understood that the first one-way valve 41 only allows liquid in the first water pipe 25 to flow from the end of the first water pipe 25 adjacent to the dispensing box 21 to the end of the first water pipe 25 adjacent to the tee fitting 24. Compared to solutions without a first one-way valve 41, the first one-way valve 41 of the washing device in this embodiment of the present invention can prevent liquid in the dispensing box 21 from entering the circulation pipe 33 through the tee fitting 24, ensuring that the water path of the dispensing box 21 assembly 2 and the water path in the circulation pipe 33 do not interfere with each other, thus improving the reliability of water flow.

[0071] As shown in Figure 8A , the first one-way valve 41 is arranged between the first water pipe 25 and the first port 241, i.e. the first water pipe 25 communicates with the first port 241 through the first one-way valve 41.

[0072] As shown in Figure 5 , the first one-way valve 41 is arranged in the first water pipe 25, and the first water pipe 25 is connected with the first port 241. It can be understood that the first water pipe 25 directly communicates with the first port 241. The first one-way valve 41 is in series on the first water pipe 25, or the first one-way valve 41 is installed in the first water pipe 25.

[0073] Optionally, as shown in Figure 4 , the washing equipment further comprises a second one-way valve 42, the second one-way valve 42 is arranged upstream of the second port 242, and the second one-way valve 42 only allows the liquid flowing out of the circulating pump 32 to be unidirectionally guided to the second port 242. It can be understood that the second one-way valve 42 only allows the liquid in the circulating pipe 33 to flow in the direction from the end of the circulating pipe 33 adjacent to the circulating pump 32 to the end of the circulating pipe 33 adjacent to the three-way piece 24. Compared with the case without the second one-way valve 42, the second one-way valve 42 of the washing equipment of the embodiment of the utility model can prevent the liquid in the circulating pipe 33 from entering the dropping box 21 through the three-way piece 24, so that the water path of the dropping box 21 assembly 2 and the water path in the circulating pipe 33 do not affect each other, which is beneficial to improve the reliability of the water path flow.

[0074] As shown in Figure 8A , the second one-way valve 42 is arranged between the circulating pipe 33 and the second port 242, i.e. the circulating pipe 33 communicates with the second port 242 through the second one-way valve 42.

[0075] As shown in Figure 4 , the second one-way valve 42 is arranged in the circulating pipe 33, and the circulating pipe 33 is connected with the second port 242. It can be understood that the circulating pipe 33 directly communicates with the second port 242. The first one-way valve 41 is in series on the circulating pipe 33, or the first one-way valve 41 is installed in the circulating pipe 33.

[0076] In one specific example, as shown in Figure 8AAs shown, the first one-way valve 41 and the second one-way valve 42 are directly communicated with the three-way piece 24, and the one-way valve three-way structure piece includes a first pipe segment 244 and a second pipe segment 245, the first port 241 and the third port 243 are respectively arranged at two ends of the first pipe segment 244, one end of the second pipe segment 245 is communicated with the first pipe segment 244, and the other end of the second pipe segment 245 constitutes the second port 242, the first one-way valve 41 is located at the first port 241, and the second one-way valve 42 is located at the second port 242.

[0077] It can be understood that the first one-way valve 41 and the second one-way valve 42 are directly communicated with the three-way piece 24, that is, the first one-way valve 41 is directly communicated with the first port 241 of the three-way piece 24, and the second one-way valve 42 is directly communicated with the second port 242 of the three-way valve.

[0078] Compared with the scheme without the first one-way valve 41 and the second one-way valve 42, the first one-way valve 41 of the washing equipment in the embodiment of the utility model can prevent the liquid in the circulating pipe 33 from entering the dropping box 21 through the three-way piece 24, the second one-way valve 42 prevents the liquid in the dropping box 21 from entering the circulating pipe 33 through the three-way piece 24, and the combination of the first one-way valve 41 and the second one-way valve 42 can make the waterway of the dropping box 21 and the waterway in the circulating pipe 33 not affect each other, thereby being beneficial to improving the reliability of waterway flow.

[0079] As shown in the figure, Figure 8B As shown, the third port 243 is directly communicated with the dropping spray head 22, the first pipe segment 244 and the axis of the dropping spray head 22 have an included angle M, and the included angle M is an obtuse angle. Therefore, the resistance of the liquid flowing into the dropping spray head 22 can be reduced, and the energy loss during the liquid flow can be reduced. The axis of the first one-way valve 41 is collinear with the axis of the first pipe segment 244, and the axis of the second one-way valve 42 is collinear with the axis of the second pipe segment 245. Therefore, the smoothness of the liquid flow when the first one-way valve 41 and the second one-way valve 42 are opened can be improved.

[0080] The washing equipment 100 in the embodiment of the utility model integrates the first one-way valve 41, the second one-way valve 42, the three-way piece 24 and the dropping spray head 22 into one overall structure piece, avoids the problem of frequent switching of the pipeline, reduces the arrangement length of the pipeline, reduces the pressure loss, reduces the production cost, and is convenient to assemble.

[0081] In some embodiments, as shown in the figure, Figure 4 As shown, the barrel assembly 1 includes an outer barrel 12, an inner barrel 13 and a door seal 14, the inner barrel 13 is rotationally arranged in the outer barrel 12, the inner barrel 13 defines a washing cavity 11, the door seal 14 is arranged at an open position of the outer barrel 12, and the dropping spray head 22 is arranged on the door seal 14.

[0082] Specifically, as shown in the figure,Figure 1 As shown, the washing device 100 further comprises a washing machine door 5 which is arranged openably at the position of the door seal 14. The door seal 14 forms a seal between the door bowl of the washing machine door 5 and the outer drum 12. Exemplarily, the door seal 14 is further provided with a door bowl spray head 23 which can spray water towards the door bowl to wash the door bowl so that the user can clearly observe the inside of the washing cavity 11 through the door bowl of the washing machine door 5.

[0083] In some embodiments, as Figures 9 to 12 As shown, the dispensing box assembly 2 comprises a dispensing box 21 and a suction member 27. The dispensing box 21 is provided with a water tank 211 for dispensing detergent, and the suction member 27 comprises a lumen 271, a water inlet 272, a water outlet 273 and a suction passage 274. The water inlet 272 and the water outlet 273 are arranged at two ends of the lumen 271 respectively. The water outlet 273 is communicated with the dispensing spray head 22 through the first water pipe 25, and the water inlet can be connected with the water inlet pipe 29. The suction passage 274 comprises a tapered section 2741. The water tank 211, the tapered section 2741 and the lumen 271 are communicated in sequence. The inner diameter of the tapered section 2741 gradually decreases along the direction towards the lumen 271 (such as the upward direction in the figure). Figure 5 As shown, the dispensing box assembly 2 comprises a dispensing box 21 and a suction member 27. The dispensing box 21 is provided with a water tank 211 for dispensing detergent, and the suction member 27 comprises a lumen 271, a water inlet 272, a water outlet 273 and a suction passage 274. The water inlet 272 and the water outlet 273 are arranged at two ends of the lumen 271 respectively. The water outlet 273 is communicated with the dispensing spray head 22 through the first water pipe 25, and the water inlet can be connected with the water inlet pipe 29. The suction passage 274 comprises a tapered section 2741. The water tank 211, the tapered section 2741 and the lumen 271 are communicated in sequence. The inner diameter of the tapered section 2741 gradually decreases along the direction towards the lumen 271 (such as the upward direction in the figure).

[0084] As can be understood, due to the tension of the water body, in the related art, the upper end of the straight-cylinder type suction passage 274 is prone to form a water film which blocks the water from entering the suction passage 274 smoothly. However, the suction member 27 of the embodiment of the present application designs the suction passage 274 (i.e. the tapered section 2741) as a funnel structure which can destroy the tension of the water body at the upper end of the suction passage 274 so that the water flow can pass through the suction passage 274 smoothly and enter the lumen 271.

[0085] On the other hand, since the inner diameter of the tapered section 2741 gradually decreases along the direction towards the lumen 271, the cross-sectional area of the tapered section 2741 gradually decreases. When the liquid is guided into the lumen 271 by the tapered section 2741, the pressure of the liquid entering the lumen 271 is increased, and thus the flow rate of the liquid is increased, and the smoothness of the liquid flow is improved.

[0086] Optionally, as Figure 15As shown, the suction channel 274 further comprises a straight pipe section 2742, the water tank 211, the tapered section 2741, the straight pipe section 2742 and the pipe cavity 271 are sequentially communicated, and the inner diameter of the straight pipe section 2742 is constant. The liquid in the water tank 211 will flow into the pipe cavity 271 through the tapered section 2741 and the straight pipe section 2742 under the action of negative pressure. Since the inner diameter of the tapered section 2741 gradually decreases in the upward direction, and the inner diameter of the straight pipe section 2742 is constant. On the one hand, the funnel-shaped tapered section 2741 can be used to guide the flow of liquid to improve the smoothness of liquid flow. On the other hand, when the suction member 27 is processed and formed, the tapered section 2741 and the straight pipe section 2742 of the suction channel 274 are less likely to produce burrs, reducing the probability that burrs hinder or block the suction channel 274, thereby improving the smoothness of liquid flow and improving the suction effect of the suction member 27.

[0087] In the examples of the present application, as Figure 15 shown, the inner diameter of the straight pipe section 2742 is substantially equal to the inner diameter of the lower end of the tapered section 2741. Compared with the scheme that the suction channel 274 is funnel-shaped as a whole, the scheme that the suction channel 274 comprises the tapered section 2741 and the straight pipe section 2742 can avoid designing the hole diameter of the lower end of the suction channel 274 to be narrow, and the inner diameter of the straight pipe section 2742 is constant. When the suction member 27 is processed and formed, burrs are less likely to occur at the position of the lower half of the suction channel 274 (i.e. the straight pipe section 2742), thereby reducing the probability that burrs hinder or block the suction channel 274 and improving the smoothness of liquid flow.

[0088] Optionally, as Figure 15 shown, the axial dimension of the tapered section 2741 is H1, and the axial dimension of the straight pipe section 2742 is H2, wherein 0.1≤H2 / H1≤0.3, and for example, 0.16≤H2 / H1≤0.18. For example, H2 / H1 can be 0.1, 0.16, 0.17, 0.18, 0.25, 0.3. The inventors of the present application have found through experimental research that when the ratio of H2 / H1 is too large, the proportion of the tapered section 2741 in the size of the entire suction channel 274 is too small to break the tension of the water film, which can easily cause the problem of poor water flow. When the ratio of H2 / H1 is too small, the proportion of the straight pipe section 2742 in the size of the entire suction channel 274 is too small, which can cause burrs to occur at the position of the straight pipe section 2742 during processing and forming, thereby blocking the normal flow of water. Therefore, the ratio of H2 / H1 is designed to be within the above range in the washing equipment 100 of the embodiments of the present application, which is beneficial to improving the smoothness of liquid flow.

[0089] For example, H1 can be between 6mm-8mm, and H2 can be between 0.96mm-1.44mm.

[0090] Optionally, as Figure 15 shown, the inner wall surface of the conical section 2741 forms an angle a with the axis of the conical section 2741, where 12°≤a≤20°. For example, a can be 12°, 14°, 16°, 18°, 20°. The inventors of the present application have found through experimental research that when the taper of the inner wall surface of the conical section 2741 is in the above numerical range, it is beneficial to improve the smoothness of the liquid flow, and it is not easy to produce burrs when processing and forming.

[0091] In some embodiments, as Figure 15 shown, the lumen 271 includes an inlet section 2711, a contraction section 2712, a throat section 2713, and a diffuser section 2714, which are sequentially communicated in the direction from the water inlet 272 to the water outlet 273. The inner diameter of the contraction section 2712 gradually decreases in the direction from the water inlet 272 to the water outlet 273, the inner diameter of the diffuser section 2714 gradually increases, and the inner diameter of the diffuser section is greater than that of the throat section 2713. Since the inner diameter of the contraction section 2712 gradually decreases, the flow rate of the liquid in the lumen 271 can be increased to make the pressure of the lumen 271 at this position the lowest, which is beneficial to improve the negative pressure suction effect of the suction passage 274. In addition, since the inner diameter of the diffuser section 2714 gradually increases, the flow rate of the liquid gradually approaches that of the inlet section 2711, reducing the energy loss of the liquid and making the flow of the liquid more stable.

[0092] As Figure 15 shown, the suction passage 274 is in communication with the diffuser section 2714, and the suction passage 274 is arranged adjacent to the throat section 2713. It can be understood that the cross section of the diffuser section 2714 is larger than that of the throat section 2713, so the flow rate of the fluid entering the diffuser section 2714 from the throat section 2713 will slow down. And the flow rate of the liquid adjacent to the inner peripheral wall region of the diffuser section 2714 will further decrease under the sudden change of the cross section of the diffuser section 2714 and the throat section 2713, so the probability of the liquid splashing out of the upper port of the suction passage 274 is small, that is, the water flow in the suction member 27 is not easy to overflow into the sink 211.

[0093] Optionally, as Figure 15As shown, the inner diameter of the throat section 2713 is φ1, and the inner diameter of the diffuser section 2714 adjacent to one end of the throat section 2713 is φ3, where 1.5≤φ3 / φ1≤1.7. For example, φ3 / φ1 can be 1.5, 1.6, 1.7. The inventors of the present application have found through experimental research that when the ratio of the inner diameters of the diffuser section 2714 and the throat section 2713 adopts the above numerical range, the liquid in the lumen 271 is more inclined to concentrate in the part with a distance less than φ1 / 2 from the axis of the diffuser section 2714 when it first enters the diffuser section 2714 after being guided by the throat section 2712, which can further reduce the probability of water overflowing from the suction channel 274 to the sink 211 when the suction member 27 is in operation, and improve the reliability of the suction member 27 in operation.

[0094] Optionally, as shown, Figure 15 the angle between the inner wall surface of the converging section 2712 and the axis of the converging section 2712 is β, where 7°≤β≤10°. For example, β can be 7°, 7.5°, 8°, 8.5°, 9°, 9.5°, 10°. The inventors of the present application have found through experimental research that when the taper of the converging section 2712 adopts the above numerical range, the liquid flowing through the converging section 2712 is less likely to produce turbulence, improving the reliability of the suction member 27 in operation.

[0095] Optionally, as shown, Figure 15 the angle between the inner wall surface of the diffuser section 2714 and the axis of the converging section 2712 is γ, where 8°≤γ≤15°. For example, γ can be 8°, 10°, 11°, 13°, 15°. The inventors of the present application have found through experimental research that when γ adopts the above numerical range, the flow rate of the liquid can gradually approach the flow rate of the inlet section 2711, further reducing the energy loss of the liquid and making the flow of the liquid more stable.

[0096] Optionally, as shown, Figure 15 the length of the throat section 2713 is L1, the inner diameter of the throat section 2713 is φ1, and 1.1≤L1 / φ1≤1.5. For example, the ratio of L1 / φ1 can be 1.1, 1.25, 1.35, 1.45, 1.5. The inventors of the present application have found through experimental research that when the length and the inner diameter of the throat section 2713 adopt the above numerical range, the length of the suction member 27 can be reduced while the liquid is splashing, so that the structure of the suction member 27 is more compact and the occupied space of the suction member 27 is reduced.

[0097] Further, the inner diameter of the throat section 2713 is φ1, and the inner diameter of the inlet section 2711 is φ2, and 0.4≤φ1 / φ2≤0.8. For example, φ1 / φ2 can be 0.4, 0.5, 0.6, 0.7, 0.8. The inventors of the present application have found through experimental research that when φ1 / φ2 adopts the above numerical range, the suction effect of the suction member 27 can be improved, and the probability of liquid splashing out of the upper port of the suction channel 274 can be reduced while reducing burrs.

[0098] For example, the inner diameter φ1 of the throat section 2713 can be selected between 3mm-5mm, and the inner diameter φ2 of the inlet section 2711 can be selected between 6mm-8mm, while ensuring 0.4≤φ1 / φ2≤0.8.

[0099] In some embodiments, as shown in Figure 15 and Figure 11 The suction member 27 further includes a pressure relief channel 275 in communication with the lumen 271, the sink 211 is provided with a pressure relief opening 212, and the dispensing box 21 assembly 2 further includes a pressure relief valve 28, which is arranged between the pressure relief opening 212 and the pressure relief channel 275. When the pressure in the lumen 271 exceeds a predetermined value, the pressure relief valve 28 opens to allow the lumen 271 to communicate with the sink 211. It can be understood that when blockage occurs in the lumen 271, the pressure in the lumen 271 will rise, and when the pressure exceeds the predetermined value, the pressure relief valve 28 can automatically open, thereby guiding the liquid in the lumen 271 into the sink 211, to avoid the problem of bursting of the suction member 27 and its connecting pipeline, and improve the reliability of the dispensing box assembly 2 in use.

[0100] For example, the pressure relief valve 28 includes a valve housing, a valve core, a spring, and a sealing ring, the valve core, the spring, and the sealing ring are all installed in the valve housing, and the valve core is blocked by the spring. When the pressure of the pressure relief hole exceeds the predetermined value, the water pressure can overcome the resistance of the spring to open the valve core to relieve pressure.

[0101] It should be noted that, as shown in Figure 12 The bottom wall or side wall of the dispensing box 21 is provided with a discharge port 215, which communicates with the washing cavity 11 of the washing device 100, so that the water flow introduced into the sink 211 by the suction member 27 due to pressure relief can be discharged into the washing cavity 11 through the discharge port 215.

[0102] Optionally, as shown in Figure 10As shown, the pressure relief passage 275 is arranged upstream of the throat section 2713, and in an example, the pressure relief passage 275 is arranged in communication with one side of the converging section 2712 adjacent to the water inlet 272. It can be understood that due to the narrow inner diameter of the converging section 2712, foreign matters in the water or burrs remaining in the lumen 271 are likely to block the converging section 2712. The washing apparatus 100 of the embodiment of the present application is provided with the pressure relief passage 275 upstream of the throat section 2713, and when the throat section 2713 downstream of the pressure relief passage 275 or the converging section 2712 downstream of the pressure relief passage 275 is blocked, the water flow can flow into the sink 211 through the pressure relief passage 275, thereby improving the reliability of the suction member 27 in use.

[0103] In an example of the present application, as shown in Figure 15 In the radial direction of the lumen 271, the suction passage 274 and the pressure relief passage 275 are located on the same side of the suction member 27. In an example, the pressure relief passage 275 is substantially parallel to the extension direction of the suction passage 274 so as to facilitate the assembly of the suction member 27 and the dispensing box. In an example, the bottom wall of the sink 211 is provided with a pressure relief opening 212 and a negative pressure opening 214, the pressure relief opening 212 is in communication with the pressure relief passage 275, and the negative pressure opening 214 is in communication with the suction passage 274. Since the suction passage 274 and the pressure relief passage 275 are located on the same side of the suction member 27, the assembly of the suction member 27 and the dispensing box 21 can be facilitated, and the structure is compact and occupies less space.

[0104] In an example, as shown in Figures 13 to 15 In an example, as shown in In another example, as shown in

[0105] In another example, as shown in Figure 14As shown, the suction channel 274 and the pressure relief channel 275 are located on the same side of the suction member 27. The axis of the pressure relief channel 275 is skewed from and perpendicular to the axis of the lumen 271, while the axis of the suction channel 274 intersects and is perpendicular to the axis of the lumen 271. The axis of the pressure relief channel 275 is parallel to and a certain distance from the axis of the suction channel 274. In other words, in a projection plane orthogonal to the axis of the suction channel 274, the center of the suction channel 274 is located on the axis of the lumen 271, while the center of the pressure relief channel 275 is not located on the axis of the lumen 271.

[0106] Optionally, such as Figure 16 and Figure 11 As shown, the dispensing box 21 has a stop surface 2132, and at least a portion of the pressure relief opening 212 is arranged opposite to the stop surface 2132. Exemplarily, the pressure relief opening 212 and the stop surface 2132 are arranged opposite each other in the direction along which liquid flows from the pressure relief channel 275 into the pressure relief opening 212. It is understood that when water is ejected from the pressure relief opening 212, the stop surface 2132 can block the water flow to prevent the water ejected from the pressure relief opening 212 from splashing in the water tank 211.

[0107] Specifically, such as Figure 12 , Figure 11 and Figure 12 As shown, the dispensing box 21 includes a side wall panel 213 and a containment portion 216. The side wall panel 213 has a recess 2131. The recess 2131 and the containment portion 216 are respectively arranged on both radial sides of the pressure relief opening 212, and a stop surface 2132 is provided on the top wall surface of the recess 2131. It can be understood that the recess 2131 and the containment portion 216 can constrain the water flow ejected from the pressure relief opening 212 to avoid the problem of disorderly splashing of the discharged liquid.

[0108] For example, such as Figure 17 and Figure 12 Figure 17 As shown, the side wall of the recess 2131 is a semi-cylindrical arc surface, and the inner wall of the enclosure 216 is also a semi-cylindrical arc surface. The recess 2131 and the enclosure 216 together form a chamber for installing the pressure relief valve 28. The stop surface 2132 is located on the top wall surface of the recess 2131. It can be understood that the water flow ejected from the pressure relief opening 212 can impact the top surface (stop surface 2132) of the recess 2131 to reduce the kinetic energy of the ejected water flow. This reduces the probability of water splashing in the water tank 211 and ensures the stability of the water flow during pressure relief.

[0109] For example, the washing equipment 100 can be a washing machine, dishwasher, or other equipment for washing other products, and this application does not limit it in this regard.

[0110] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0111] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0112] In the utility model, unless otherwise specifically defined and limited, the terms "set", "installed", "connected", "connected", "fixed" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0113] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0114] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0115] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the changes, modifications, replacements and modifications of the above embodiments made by the person skilled in the art are within the protection scope of the present application.

Claims

1. A washing apparatus characterized by comprising: The washing device comprises: a barrel assembly, a washing cavity is arranged in the barrel assembly; a dispensing box assembly, the dispensing box assembly comprises a dispensing box and a dispensing spray head, the dispensing spray head is arranged on the barrel assembly, and the dispensing box is communicated with the washing cavity through the dispensing spray head; a circulating assembly, the circulating assembly comprises a drain pipe, a circulating pump and a circulating pipe, one end of the drain pipe is communicated with the washing cavity, the other end of the drain pipe is communicated with the inlet of the circulating pump, the outlet of the circulating pump is communicated with one end of the circulating pipe, and the other end of the circulating pipe is communicated with the dispensing spray head.

2. The washing apparatus according to claim 1, characterized by, The dispensing box assembly comprises a tee joint and a first water pipe, the tee joint has a first port, a second port and a third port, one end of the first water pipe is communicated with the dispensing box, the other end of the first water pipe is communicated with the first port, the other end of the circulating pipe is communicated with the second port, and the third port is communicated with the dispensing spray head.

3. The washing apparatus according to claim 2, characterized by, The tee joint and the spray head are communicated in one of the following manners: The third port is directly communicated with the dispensing spray head, which is a tee spray structure, the tee spray structure comprises a first pipe segment and a second pipe segment, the first port and the third port are respectively arranged at two ends of the first pipe segment, one end of the second pipe segment is communicated with the first pipe segment, the other end of the second pipe segment constitutes the second port, and an included angle M is formed between the first pipe segment and the axis of the dispensing spray head, and the included angle M is an obtuse angle. The dispensing box assembly further comprises a second water pipe, the third port is communicated with the dispensing spray head through the second water pipe, and an included angle M is formed between the second water pipe and the axis of the dispensing spray head, and the included angle M is an obtuse angle.

4. The washing apparatus according to claim 3, characterized by The washing device further comprises a first one-way valve, the first one-way valve is arranged upstream of the first port, and the first one-way valve only allows liquid in the dispensing box to be unidirectionally introduced into the first port. And / or, the washing device further comprises a second one-way valve, the second one-way valve is arranged upstream of the second port, and the second one-way valve only allows liquid flowing out of the circulating pump to be unidirectionally introduced into the second port.

5. The washing apparatus according to claim 4, wherein The first one-way valve and the tee joint are communicated in one of the following manners: The first one-way valve is arranged between the first water pipe and the first port. The first one-way valve is arranged on the first water pipe, and the first water pipe is connected with the first port.

6. The washing apparatus according to claim 4 or 5, characterized by The second one-way valve and the tee joint are communicated in one of the following manners: The second one-way valve is arranged between the circulating pipe and the second port. The second one-way valve is arranged on the circulating pipe, and the circulating pipe is connected with the second port.

7. The washing apparatus according to claim 4, wherein The first one-way valve, the second one-way valve and the tee joint are directly communicated, which is a one-way valve tee structure, the one-way valve tee structure comprises a first pipe segment and a second pipe segment, the first port and the third port are respectively arranged at two ends of the first pipe segment, one end of the second pipe segment is communicated with the first pipe segment, the other end of the second pipe segment constitutes the second port, the first one-way valve is located at the first port, and the second one-way valve is located at the second port.

8. The washing apparatus according to claim 7, characterized by The third port is directly communicated with the dosing shower head, an included angle M is formed between the first pipe segment and an axis of the dosing shower head, the included angle M is an obtuse angle, an axis of the first one-way valve is collinear with an axis of the first pipe segment, and an axis of the second one-way valve is collinear with an axis of the second pipe segment.

9. The washing apparatus according to claim 1, wherein The barrel assembly comprises an outer barrel, an inner barrel and a door seal, the inner barrel is rotationally arranged in the outer barrel, the door seal is arranged at an open position of the outer barrel, and the dosing shower head is arranged on the door seal.

10. The washing apparatus according to claim 1, wherein The dosing box assembly further comprises a suction member, the dosing box is provided with a water tank for dosing detergent, the suction member comprises a lumen, a water inlet, a water outlet and a suction channel, the water inlet and the water outlet are respectively arranged at two ends of the lumen, the water outlet is communicated with the dosing shower head, the suction channel comprises a tapered segment, the water tank, the tapered segment and the lumen are sequentially communicated, and an inner diameter of the tapered segment gradually decreases in a direction towards the lumen.

11. The washing apparatus according to claim 10, wherein The suction channel further comprises a straight pipe segment, the water tank, the tapered segment, the straight pipe segment and the lumen are sequentially communicated, an inner diameter of the straight pipe segment is constant, an axial dimension of the tapered segment is H1, and an axial dimension of the straight pipe segment is H2, wherein 0.1≤H2 / H1≤0.

3.

12. The washing apparatus according to claim 10, wherein An included angle between an inner wall surface of the tapered segment and an axis of the tapered segment is α, wherein 12°≤α≤20°.

13. The washing apparatus according to claim 10, wherein The lumen comprises an inlet segment, a contraction segment, a throat segment and a diffuser segment, the inlet segment, the contraction segment, the throat segment and the diffuser segment are sequentially communicated in a direction from the water inlet to the water outlet, the water inlet is arranged at the inlet segment, and the water outlet is arranged at the diffuser segment, an inner diameter of the contraction segment gradually decreases in the direction from the water inlet to the water outlet, and the suction channel is arranged at a side of the diffuser segment adjacent to the throat segment.

14. The washing apparatus according to claim 13, wherein The dimensions in the lumen are set in at least one of the following manners: An included angle between an inner wall surface of the contraction segment and an axis of the contraction segment is β, wherein 7°≤β≤10°; An included angle between an inner wall surface of the diffuser segment and an axis of the contraction segment is γ, wherein 8°≤γ≤15°; A length of the throat segment is L1, and an inner diameter of the throat segment is φ1, wherein 1.1≤L1 / φ1≤1.5; An inner diameter of the throat segment is φ1, and an inner diameter of one end of the diffuser segment adjacent to the throat segment is φ3, wherein 1.5≤φ3 / φ1≤1.

7.

15. The washing apparatus according to claim 10, wherein The suction member further comprises a pressure relief channel communicated with the lumen, the water tank is provided with a pressure relief opening, the dosing box assembly further comprises a pressure relief valve, the pressure relief valve is arranged between the pressure relief opening and the pressure relief channel, and when a pressure in the lumen exceeds a preset value, the pressure relief valve is opened to communicate the lumen with the water tank.

16. The washing apparatus according to claim 15, wherein The dosing box has a stop surface, and at least part of the pressure relief opening is arranged opposite to the stop surface.

17. The washing apparatus according to claim 16, wherein The dosing box comprises a side wall plate and an enclosing part, the side wall plate has a recessed part, the recessed part and the enclosing part are respectively arranged at two radial sides of the pressure relief opening, and the stop surface is arranged at a top wall surface of the recessed part.

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