Residue collecting and filtering device and dishwasher

Abstract

A residue collecting and filtering device (10) and a dishwasher. The residue collecting and filtering device (10) comprises: a filtering chamber (102), the filtering chamber (102) being provided with a first inlet (1021) and a first outlet (1022), the first inlet (1021) being used for introducing washing water, and the filtering chamber (102) being used for separating residues from water in the washing water; and a residue collecting chamber (103), the residue collecting chamber (103) being provided with a second inlet (1031) and a second outlet (1032), the second inlet (1031) leading to the filtering chamber (102), and the residue collecting chamber (103) being used for collecting the residues separated by the filtering chamber (102). The residue collecting and filtering device (10) further comprises a circulation pump (12), wherein a first flow channel is provided between an inlet of the circulation pump (12) and the first outlet (1022), and a second flow channel is provided between the inlet of the circulation pump (12) and the second outlet (1032), the flow resistance from the filtering chamber (102) to the circulation pump (12) being smaller than the flow resistance from the residue collecting chamber (103) to the circulation pump (12).

Description

Sludge collecting and filtering device and dishwasher

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese patent application No. 202411311362.2, filed on September 19, 2024, with the Chinese Patent Office, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of dishwashers, and in particular to a sludge collecting and filtering device and a dishwasher. BACKGROUND

[0004] A dishwasher applies internal circulating water for jet washing, so as to reduce water consumption. During the washing process, food residues enter the water and are filtered through a filter screen. As the food residues accumulate, the holes on the filter screen are gradually blocked by large particles, reducing the water inflow of the water pump and affecting the water jet intensity of the washing, resulting in unclean dishes. To ensure the washing effect of the dishwasher, the user must clean the filter screen regularly.

[0005] In the existing internal circulation system, the residues are always flushed by the circulating water, and small particles of residues can enter the cleaning water and be brought to the dishes, causing secondary pollution of the dishes. To ensure the washing effect of the dishwasher, there are usually the following solutions: 1) increasing the filter screen area to reduce the frequency of cleaning the filter screen by the user; 2) using a scraper to clean the side where the residues accumulate on the filter screen.

[0006] However, increasing the filter screen area increases the cost of the filter screen; the residues are squeezed when the scraper cleans, and the residues penetrate the filter screen into the water pump, causing secondary pollution, affecting the cleaning effect, affecting the performance and service life of the filter screen, and also increasing the secondary pollution and affecting the cleaning effect. In addition, the residues adhere to the filter screen, and the residues are difficult to discharge.

[0007] SUMMARY

[0008] One object of the present application is to provide a sludge collecting and filtering device and a dishwasher.

[0009] According to the slag collecting and filtering device provided by the embodiment of the present application, the washing water can be filtered through the filtering cavity, and the slag can be collected through the slag collecting cavity, so that the filtering effect of the slag collecting and filtering device is improved, and the slag can be conveniently discharged.

[0010] According to the slag collecting and filtering device provided by the embodiment of the present application, the washing water can be filtered through the filtering cavity, and the slag can be collected through the slag collecting cavity, so that the filtering effect of the slag collecting and filtering device is improved, and the slag can be conveniently discharged.

[0011] In addition, the slag collecting and filtering device provided by the above-mentioned embodiment of the present application can further have the following additional technical features:

[0012] In some embodiments, the length L1 of the first flow channel is less than the length L2 of the second flow channel.

[0013] In some embodiments, L2 / L1 is greater than or equal to 1.1.

[0014] In some embodiments, the negative pressure value P1 of the negative pressure generated at the first outlet by the circulating pump during operation is greater than the negative pressure value P2 of the negative pressure generated at the second outlet.

[0015] In some embodiments, P1 / P2 is greater than or equal to 1.1.

[0016] In some embodiments, the minimum cross-sectional area S1 of the first flow channel is greater than the minimum cross-sectional area S2 of the second flow channel.

[0017] In some embodiments, S1 / S2 is greater than or equal to 1.1.

[0018] In some embodiments, the first flow channel and the second flow channel are connected in parallel with each other; or, the first outlet, the second outlet and the inlet of the circulating pump are connected through a same pump flow channel, and the first flow channel and the second flow channel are arranged in the pump flow channel.

[0019] In some embodiments, the slag collecting and filtering device comprises a water cup, the water cup comprises a cup body and a flow channel plate, the flow channel plate covers the lower part of the cup body, the first outlet and the second outlet are arranged on the flow channel plate, and at least a part of the first flow channel and / or at least a part of the second flow channel are arranged on the flow channel plate.

[0020] In some embodiments, the flow channel plate is further provided with a pump interface for connecting a circulating pump, the first flow channel is connected between the pump interface and the first outlet, and the second flow channel is connected between the pump interface and the second outlet.

[0021] In some embodiments, the filter cavity is provided with a first filter screen, the first inlet and the second inlet are arranged on one side of the first filter screen, and the first outlet is arranged on the other side of the first filter screen; the slag collecting cavity is provided with a second filter screen, the second inlet is arranged on one side of the second filter screen, and the second outlet is arranged on the other side of the second filter screen.

[0022] In some embodiments, a filtering flow rate Q1 of the first filter screen is greater than a filtering flow rate Q2 of the second filter screen.

[0023] In some embodiments, Q1 / Q2≥2.

[0024] In some embodiments, the filter cavity is provided with a vent hole for communicating an external space of the slag collecting and filtering device to balance the internal and external air pressures of the filter cavity; and / or, other positions of the slag collecting cavity except the second inlet and the second outlet are closed during filtering of the slag collecting and filtering device.

[0025] In some embodiments, the slag collecting cavity is further provided with a slag discharge port, and the slag collecting and filtering device further comprises a drainage pump and a one-way valve, the one-way valve is used to open and close the slag discharge port, and the drainage pump is connected to the slag discharge port when the one-way valve is opened.

[0026] A dishwasher according to an embodiment of the present application comprises the aforementioned slag collecting and filtering device. BRIEF DESCRIPTION OF DRAWINGS

[0027] FIG. 1 is a schematic view of a slag collecting and filtering device according to an embodiment of the present application.

[0028] FIG. 2 is a schematic view of a slag collecting and filtering device according to an embodiment of the present application.

[0029] FIG. 3 is a sectional view of a slag collecting and filtering device according to an embodiment of the present application.

[0030] FIG. 4 is a sectional view of a slag collecting and filtering device according to an embodiment of the present application.

[0031] FIG. 5 is a sectional view of a slag collecting and filtering device according to an embodiment of the present application.

[0032] FIG. 6 is a sectional view of a slag collecting and filtering device according to an embodiment of the present application.

[0033] FIG. 7 is a schematic view of a slag collecting and filtering device according to an embodiment of the present application.

[0034] Figure 8 is an exploded view of a slag collection and filtration device according to an embodiment of this application.

[0035] Figure 9 is an exploded view of a slag collection and filtration device according to an embodiment of this application.

[0036] Figure 10 is a schematic diagram of the water cup of a slag collection and filtration device according to an embodiment of this application.

[0037] Reference numerals: 10, Slag collection and filtration device; 101, Water collection chamber; 161, Flat filter screen; 162, Filter cup; 102, Filtration chamber; 1021, First inlet; 1022, First outlet; 1023, Vent; 163, First filter screen; 1631, First baffle; 1632, Filtration chamber cover; 1633, First sealing ring; 103, Slag collection chamber; 1031, Second inlet; 1032, Second outlet; 1033, Slag discharge port; 164, Second filter screen; 1641, Second baffle; 1 642. Slag collection chamber cover; 1643. Second sealing ring; 17. One-way valve; 104. Drainage chamber; 11. Water cup; 111. Cup body; 1111. Water distribution valve; 112. Flow channel plate; 1121. Pump flow channel; 1122. Backflushing flow channel; 1123. Transmission chamber; 1124. Flushing device; 12. Circulation pump; 13. Drainage pump; 14. Drive component; 15. Transmission assembly; 151. First gear; 152. Second gear; 153. Third gear; 154. First shaft; 155. Second shaft. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0039] As shown in Figures 1 to 6, the slag collection and filtration device 10 according to an embodiment of this application is used in a dishwasher. The slag collection and filtration device 10 includes a filter chamber 102 and a slag collection chamber 103. The filter chamber 102 has a first inlet 1021 and a first outlet 1022. The first inlet 1021 is used to introduce washing water, and the filter chamber 102 is used to separate residue and water in the washing water. The slag collection chamber 103 has a second inlet 1031 and a second outlet 1032. The second inlet 1031 is connected to the filter chamber 102, and the slag collection chamber 103 is used to collect the residue separated by the filter chamber 102.

[0040] Specifically, during the operation of the dishwasher, the circulating pump 12 can drive the washing water to flow from the residue collecting and filtering device 10 to the spray arm and other components for cleaning tableware, and the tableware is cleaned by the washing water; then the washing water flows into the residue collecting and filtering device 10; then the washing water flows into the filtering cavity 102, and the washing water in the filtering cavity 102 is subjected to residue-water separation; most of the separated water flows into the circulating pump 12 and is pumped to the spray arm and other components for cleaning tableware by the circulating pump 12, and the separated residue flows into the residue collecting cavity 103.

[0041] According to the residue collecting and filtering device 10 of the embodiment of the present application, the washing water can be filtered by the filtering cavity 102, and the residue can be collected by the residue collecting cavity 103, so that the residue can be stored in the residue collecting cavity 103, the residue collection during the washing process is facilitated, and the residue stored in the filtering cavity 102 does not affect the residue-water separation of the washing water in the filtering cavity 102, thereby improving the filtering effect of the residue collecting and filtering device 10. In addition, after the residue is collected by the residue collecting cavity 103, the residue can be discharged by manual or automatic mode. Since the residue is relatively concentrated, the residue can be conveniently discharged.

[0042] In addition, the residue collecting and filtering device 10 further comprises a circulating pump 12, a first flow channel is arranged between the inlet of the circulating pump 12 and the first outlet 1022, a second flow channel is arranged between the inlet of the circulating pump 12 and the second outlet 1032, and the flow resistance from the filtering cavity 102 to the circulating pump 12 is smaller than the flow resistance from the residue collecting cavity 103 to the circulating pump 12. After the washing water flows into the residue collecting and filtering device 10, part of the washing water is discharged from the filtering cavity 102 through the first outlet 1022, and part of the washing water is discharged from the residue collecting cavity 103 through the second outlet 1032. In addition, the circulating pump 12 drives the washing water at the first outlet 1022 to the circulating pump 12 through the first flow channel, and drives the washing water at the second outlet 1032 to the circulating pump 12 through the second flow channel, so as to collect the washing water to the circulating pump 12, thereby facilitating the washing water demand of the dishwasher. The flow resistance from the filtering cavity 102 to the circulating pump 12 is different from the flow resistance from the residue collecting cavity 103 to the circulating pump 12, so that the fluid can more easily flow from the filtering cavity 102 to the circulating pump 12. In this way, the washing water flowing into the residue collecting and filtering device 10 is subjected to residue-water separation in the filtering cavity 102, and the residue is collected in the residue collecting cavity 103, so as to reduce the fluid flow in the residue collecting cavity 103, thereby facilitating residue collection.

[0043] In order to make the flow resistance of the fluid in the two flow channels different, the present application can include but is not limited to the following embodiments and their combinations. For the convenience of description, the flow channel from the filtering cavity 102 to the inlet of the circulating pump 12 is set as the first flow channel, and the flow channel from the residue collecting cavity 103 to the inlet of the circulating pump 12 is set as the second flow channel.

[0044] In the embodiment 1, the length L1 of the first flow path is less than the length L2 of the second flow path. Since the first flow path has a longer length, the resistance of fluid in the first flow path is greater than the resistance of fluid in the second flow path, which can make the washing water more easily flow to the circulating pump 12 through the first flow path. Thus, the stability of the slag collecting and filtering device 10 is improved, and the filtering effect and the slag collecting efficiency are improved.

[0045] Preferably, L2 / L1≥1.1. Wherein, L2 / L1 can be set as 1.1, 1.5, 1.8, 2.1 or 3, etc. The filtering efficiency and effect can be further improved, and the washing water entering the slag collecting cavity 103 is reduced, so as to avoid the backflow of the residue in the slag collecting cavity 103 to the filtering cavity 102.

[0046] In the embodiment 2, the negative pressure value P1 of the negative pressure generated at the first outlet 1022 when the circulating pump 12 is working is greater than the negative pressure value P2 of the negative pressure generated at the second outlet 1032 when the circulating pump 12 is working. This can make the washing water more easily flow to the circulating pump 12 through the first flow path. Thus, the stability of the slag collecting and filtering device 10 is improved, and the filtering effect and the slag collecting efficiency are improved.

[0047] Further, P1 / P2≥1.1. Wherein, P1 / P2 can be set as 1.1, 1.5, 1.8, 2.1 or 3, etc. The filtering efficiency and effect can be further improved, and the washing water entering the slag collecting cavity 103 is reduced, so as to avoid the backflow of the residue in the slag collecting cavity 103 to the filtering cavity 102.

[0048] Wherein, the negative pressure value P1 of the negative pressure generated at the first outlet 1022 when the circulating pump 12 is working can be the absolute value of the difference between the air pressure value at the first outlet 1022 and the air pressure value of the filtering cavity 102; or the absolute value of the difference between the air pressure value at the first outlet 1022 and the air pressure value at the first inlet 1021. The negative pressure value P2 of the negative pressure generated at the second outlet 1032 when the circulating pump 12 is working can be the absolute value of the difference between the air pressure value at the second outlet 1032 and the air pressure value of the slag collecting cavity 103; or the absolute value of the difference between the air pressure value at the second outlet 1032 and the air pressure value at the second inlet 1031.

[0049] In the embodiment 3, the minimum cross-sectional area S1 of the first flow path is greater than the minimum cross-sectional area S2 of the second flow path. Since the first flow path has a larger cross-sectional area, the resistance of fluid in the first flow path is greater than the resistance of fluid in the second flow path, which can make the washing water more easily flow to the circulating pump 12 through the first flow path. Thus, the stability of the slag collecting and filtering device 10 is improved, and the filtering effect and the slag collecting efficiency are improved.

[0050] Further, S1 / S2≥1.1. Wherein, S1 / S2 can be set as 1.1, 1.5, 1.8, 2.1 or 3, etc. The filtering efficiency and effect can be further improved, and the washing water entering the slag collecting cavity 103 is reduced, so as to avoid the backflow of the residue in the slag collecting cavity 103 to the filtering cavity 102.

[0051] In embodiment 4, the filtering cavity 102 is provided with a first filter screen 163, the first inlet 1021 and the second inlet 1031 are arranged on one side of the first filter screen 163, and the first outlet 1022 is arranged on the other side of the first filter screen 163. Specifically, the washing water enters the filtering cavity 102 through the first inlet 1021, the water in the washing water flows to the first outlet 1022 through the first filter screen 163, and is finally pumped for cleaning tableware, etc. The residue in the washing water will be sent out of the filtering cavity 102 through the second inlet 1031, and flows to the slag collecting cavity 103, so that the slag collecting cavity 103 is used for separating the residue. The slag-water separation of the filtering cavity 102 can be facilitated, the filtering efficiency and effect of the filtering cavity 102 are improved, and the first filter screen 163 can be prevented from being blocked, so that the stability of the slag filtering device 10 is improved. Of course, the first filter screen 163 in the present application can also be arranged outside the filtering cavity 102.

[0052] The slag collecting cavity 103 is provided with a second filter screen 164, the second inlet 1031 is arranged on one side of the second filter screen 164, and the second outlet 1032 is arranged on the other side of the second filter screen 164. Specifically, the residue and part of the water separated by the filtering cavity 102 enter the slag collecting cavity 103 through the second inlet 1031; under the filtering effect of the second filter screen 164, the water is sent out through the second outlet 1032, and is sent to the component for washing tableware under the driving effect of the circulating pump 12; the residue after filtering is stored in the slag collecting cavity 103, and can be discharged through the residue discharge port 1033. The slag collecting cavity 103 can separate the water and the residue entering the slag collecting cavity 103, so part of the water of the filtering cavity 102 can enter the slag collecting cavity 103, so that the residue in the filtering cavity 102 can be taken into the slag collecting cavity 103 by the water flow, so as to facilitate the slag collecting cavity 103 to collect the residue. In addition, the water entering the slag collecting cavity 103 is sent out after being filtered, which can avoid the backflow of the slag-water mixture in the slag collecting cavity 103 to the filtering cavity 102. Of course, the second filter screen 164 in the present application can also be arranged outside the slag collecting cavity 103.

[0053] Optionally, the filtering flow Q1 of the first filter screen 163 is greater than the filtering flow Q2 of the second filter screen 164. Since the filtering flow of the first filter screen 163 is greater, the resistance of the fluid in the first flow path is greater than the resistance of the fluid in the second flow path, so that the washing water can more easily flow to the circulating pump 12 through the first flow path. Thus, the stability of the slag filtering device 10 is improved, and the filtering effect and slag collecting efficiency are improved.

[0054] Further, Q1 / Q2≥2. Wherein, Q1 / Q2 can be set as 2, 2.2, 2.3, 3.1 or 4, etc. The filtration efficiency and effect can be further improved, and the washing water entering the slag collecting cavity 103 is reduced, so as to avoid the backflow of the residue in the slag collecting cavity 103 to the filtration cavity 102.

[0055] In some examples, the first flow channel and the second flow channel are parallel to each other, which can reduce the mutual interference between the first flow channel and the second flow channel, so as to facilitate the flow of fluid in the first flow channel and the second flow channel.

[0056] In other examples, the first outlet 1022, the second outlet 1032 and the inlet of the circulating pump 12 are communicated through the same pump flow channel 1121, and the first flow channel and the second flow channel are arranged in the pump flow channel 1121. The flow channel can be simplified, and the generation, maintenance and use of the slag collecting and filtering device 10 can be facilitated.

[0057] In some examples, the slag collecting cavity 103 can further include a slag discharge port 1033, and the slag collecting and filtering device 10 further includes a drainage pump 13, and the drainage pump 13 is communicated with the slag discharge port 1033. Optionally, the slag collecting and filtering device 10 further includes a one-way valve 17, which is used to open and close the slag discharge port 1033, and the drainage pump 13 is communicated with the slag discharge port 1033 when the one-way valve 17 is opened. The one-way valve 17 can include a cover plate, a rubber cap, a support and a third sealing ring, etc., and mainly realizes the opening and closing function of the slag discharge port 1033. The support can be used as a support, and is assembled with the slag discharge port 1033 and sealed by the sealing ring. The support can be provided with an opening, and the rubber cap can be connected with the support and arranged to be rotatable for opening and closing the opening. Wherein, the part of the rubber cap opposite to the opening is provided with a cover plate, which is used to support the rubber cap to improve the sealing effect when the rubber cap closes the opening. The one-way valve 17 is used to realize the opening and closing of the slag discharge port 1033. The inner bottom surface of the slag collecting cavity 103 can be arranged as an inclined surface which gradually inclines downward in the direction from the filtration cavity 102 to the slag discharge port 1033. The lower end of the second filter screen 164 can be arranged to be higher than the inner bottom surface of the slag collecting cavity 103, so that the residue remaining in the slag collecting cavity 103 can be prevented from adhering to the surface of the second filter screen 164, and the filtration performance of the second filter screen 164 is improved. The inner bottom surface of the slag collecting cavity 103 is provided with a boss, the second outlet 1032 is arranged on the top surface of the boss, and the second filter screen 164 is arranged on the boss.

[0058] Optionally, the slag collecting and filtering device 10 further comprises a water collecting cavity 101 for collecting the washing water. The water collecting cavity 101 and the filtering cavity 102 are arranged side by side, and the first inlet 1021 is arranged between the water collecting cavity 101 and the filtering cavity 102. The filtering cavity 102 and the slag collecting cavity 103 are arranged side by side, and the second inlet 1031 is arranged between the filtering cavity 102 and the slag collecting cavity 103. The second inlet 1031 can be arranged to be higher than the bottom of the filtering cavity 102 and the bottom of the slag collecting cavity 103. Optionally, the water collecting cavity 101, the filtering cavity 102 and the slag collecting cavity 103 are arranged side by side, the water collecting cavity 101 is adjacent to the filtering cavity 102, the filtering cavity 102 is adjacent to the slag collecting cavity 103, and the slag collecting cavity 103 is adjacent to the water collecting cavity 101. The water and the slag can flow conveniently, so that the washing water can be filtered and the slag can be collected.

[0059] In addition, the slag collecting and filtering device 10 can comprise a drainage cavity 104 arranged below the water collecting cavity 101 and communicating with the water collecting cavity 101 and the slag discharge port 1033, and the drainage pump 13 communicates with the drainage cavity 104.

[0060] As shown in FIG. 1, FIG. 4 and FIG. 5, in some embodiments, the slag collecting and filtering device 10 further comprises a planar filter screen 161 having a mounting port, and the planar filter screen 161 is arranged to be inclined downward from the periphery to the mounting port, and the upper end of the water collecting cavity 101 is provided with a water collecting port and is opposite to the mounting port; a filter cup 162 is arranged in the mounting port and the water collecting cavity 101. The filter screens (the first filter screen 163, the second filter screen 164 and the filter cup 162) in the present application can be arranged in a detachable structure and can be taken out from the inside of the cleaning cavity, so that the later maintenance is facilitated. The peripheral wall of the filter cup 162 is provided with a first filtering part and the bottom wall is provided with a second filtering part, the first filtering part filters the washing water from the water collecting cavity 101 to the filtering cavity 102, and the second filtering part filters the washing water from the water collecting cavity 101 to the drainage cavity 104. The discharge of the slag can be facilitated. Optionally, the mesh size of the first filtering part is larger than the mesh size of the second filtering part. Optionally, the lower end of the water collecting cavity 101 is provided with a positioning part, and the lower end of the filter cup 162 is detachably buckled with the positioning part. The filtering and dismounting of the filter cup 162 are facilitated, so that the one-time filtering is facilitated and the treatment of the slag with large volume is facilitated.

[0061] In some embodiments, the slag collecting and filtering device 10 comprises a water cup 11, which can comprise a water collecting cavity 101, a filtering cavity 102, a slag collecting cavity 103, a water discharging cavity 104, and a shunt cavity, etc., so as to improve the integration of the slag collecting and filtering device 10, simplify the slag collecting and filtering device 10, and improve the stability of the dishwasher. Of course, the water collecting cavity 101, the filtering cavity 102, and the slag collecting cavity 103, etc. in the present application can also be provided in a split structure. Optionally, the water cup 11 comprises a cup body 111 and a flow channel plate 112, the flow channel plate 112 covers the lower side of the cup body 111, the first outlet 1022 and the second outlet 1032 are provided on the flow channel plate 112, and at least a part of the first flow channel and / or at least a part of the second flow channel are provided on the flow channel plate 112. In this way, the integration of the slag collecting and filtering device 10 can be improved, the structure can be simplified, the water circuit can be optimized, and the connection between the circulating pump 12 and the slag collecting cavity 103 and the filtering cavity 102 can be facilitated.

[0062] In some embodiments, the flow channel plate 112 can serve as the bottom wall of the filtering cavity 102 and the slag collecting cavity 103, and the flow channel plate 112 is further provided with a flushing flow channel, which is communicated with a flushing device 1124 and is used to connect the circulating pump 12. The flow channel plate 112 is further provided with a transmission cavity 1123, and the transmission assembly 15 is provided in the transmission cavity 1123.

[0063] In some embodiments, the flow channel plate 112 is further provided with a pump interface for connecting the circulating pump 12, the first flow channel is connected between the pump interface and the first outlet 1022, and the second flow channel is connected between the pump interface and the second outlet 1032, so as to facilitate the connection between the circulating pump 12, the first outlet 1022, and the second outlet 1032, simplify the flow circuit, and facilitate the assembly and maintenance of the slag collecting and filtering device 10, etc.

[0064] In some embodiments, the filtering cavity 102 is provided with a first filter screen 163, the first inlet 1021 and the second inlet 1031 are provided on one side of the first filter screen 163, and the first outlet 1022 is provided on the other side of the first filter screen 163; the slag collecting cavity 103 is provided with a second filter screen 164, the second inlet 1031 is provided on one side of the second filter screen 164, and the second outlet 1032 is provided on the other side of the second filter screen 164.

[0065] Optionally, as shown in FIG. 4 and FIG. 8, the upper end of the filtering cavity 102 is provided with a filtering cavity cover 1632, and a first filter screen 163 is rotatably arranged in the filtering cavity 102, the upper end of the first filter screen 163 is rotatably connected with the filtering cavity cover 1632, and the lower end is rotatably connected with the flow channel plate 112. The first filter screen 163 can be arranged to rotate freely, that is, the first filter screen 163 can be arranged to rotate under the driving action of water flow; in addition, the first filter screen 163 can also be arranged to rotate under the driving of the driving member 14. The circumferential surface of the filtering cavity cover 1632 is provided with a first groove portion, a first sealing ring 1633 is arranged along the circumference of the filtering cavity cover 1632 and cooperates with the first groove portion, the first sealing ring 1633 seals the gap between the filtering cavity cover 1632 and the inner circumferential surface of the filtering cavity 102, in addition, the filtering cavity cover 1632 is also provided with a bearing, the upper end of the first filter screen 163 is connected with the bearing, and the bearing is used to realize the rotational connection between the first filter screen 163 and the filtering cavity cover 1632. The upper end of the first filter screen 163 is rotatably connected with the filtering cavity cover 1632.

[0066] Optionally, as shown in FIG. 4 and FIG. 9, the upper end of the slag collecting cavity 103 is provided with a slag collecting cavity cover 1642, and a second filter screen 164 is rotatably arranged in the slag collecting cavity 103, the upper end of the second filter screen 164 is rotatably connected with the slag collecting cavity cover 1642, and the lower end is rotatably connected with the flow channel plate 112. The second filter screen 164 can be arranged to rotate freely, that is, the second filter screen 164 can be arranged to rotate under the driving action of water flow; in addition, the second filter screen 164 can also be arranged to rotate under the driving of the driving member 14. The circumferential surface of the slag collecting cavity cover 1642 is provided with a second groove portion, a second sealing ring 1643 is arranged along the circumference of the slag collecting cavity cover 1642 and cooperates with the groove portion, the second sealing ring 1643 seals the gap between the slag collecting cavity cover 1642 and the inner circumferential surface of the slag collecting cavity 103, in addition, the slag collecting cavity cover 1642 is also provided with a bearing, the upper end of the second filter screen 164 is connected with the bearing, and the bearing is used to realize the rotational connection between the second filter screen 164 and the slag collecting cavity cover 1642. The upper end of the second filter screen 164 is rotatably connected with the slag collecting cavity cover 1642, and the lower end is rotatably connected with the bottom wall of the slag collecting cavity 103. The upper end of the second filter screen 164 is rotatably connected with the slag collecting cavity cover 1642.

[0067] Optionally, as shown in FIG. 6, the flow channel plate 112 is provided with a flushing device 1124 extending into the filtering cavity 102 for flushing the first filter screen 163, and the flow channel plate 112 is further provided with a backflushing flow channel 1122 communicating with the flushing device 1124 and configured to communicate with the outlet of the circulating pump 12. The flushing device 1124 is configured to spray water towards the first filter screen 163 for flushing the first filter screen 163. The flushing device 1124 can be arranged downstream of the first filter screen 163 and spray water towards the first filter screen 163. The first filter screen 163 can be in the shape of a cylinder, and the peripheral wall of the first filter screen 163 is configured to separate the residue from the water in the washing water, wherein the inner side of the first filter screen 163 communicates with the first outlet 1022, and the outer side of the first filter screen 163 communicates with the first inlet 1021 and the second inlet 1031.

[0068] The flushing device 1124 can include at least one backflushing spray arm arranged inside the first filter screen 163 and configured to spray water towards the peripheral wall of the first filter screen 163. The backflushing spray arm is arranged to extend along the axial direction of the first filter screen 163 and offset from the central axis of the first filter screen 163. The spray range of the spray opening of the at least one backflushing spray arm covers the first filter screen 163 along the axial direction of the first filter screen 163, that is, the flushing area of the backflushing spray arm can cover the entire first filter screen 163 along the axial direction. Optionally, the backflushing spray arm can include a plurality of backflushing spray arms, and the plurality of backflushing spray arms can be distributed along the peripheral direction of the first filter screen 163. The flushing device 1124 communicates with the outlet of the circulating pump 12, and the residue collecting and filtering device 10 is provided with a water distribution valve 1111 for connecting the spray arm, the outlet of the circulating pump 12 communicates with the water distribution valve 1111, and the circulating pump 12 is connected with a flushing branch, one end of the flushing branch communicates with the outlet, and the other end communicates with the flushing device 1124.

[0069] As shown in FIG. 2, FIG. 6 and FIG. 7, in some embodiments, the flow channel plate 112 is further provided with a transmission cavity 1123, and a transmission assembly 15 is arranged in the transmission cavity 1123. The slag collecting and filtering device 10 further comprises a driving member 14, and the transmission assembly 15 is in transmission connection with the driving member 14, a first filter screen 163 and a second filter screen 164. The transmission assembly 15 can comprise a first gear 151, a second gear 152 and a third gear 153, which are in transmission connection. The first gear 151 is in transmission connection with the driving member 14, the second gear 152 is in transmission connection with the first filter screen 163, and the third gear 153 is in transmission connection with the second filter screen 164. The first gear 151, the second gear 152 and the third gear 153 can be arranged in the transmission cavity 1123. The transmission assembly 15 can further comprise a first shaft 154. The upper end of the first filter screen 163 is provided with a first mounting hole, and the upper end of the first shaft 154 is arranged in the first mounting hole. The first shaft 154 and the first mounting hole can be in key connection or the like, so as to drive the first filter screen 163 to rotate by the first shaft 154. The lower end of the first shaft 154 is connected with the second gear 152. The lower end of the first shaft 154 is arranged in the bottom wall of the filtering cavity 102 and is provided with a bearing and an oil seal. The transmission assembly 15 can further comprise a second shaft 155. The upper end of the second filter screen 164 is provided with a second mounting hole, and the upper end of the second shaft 155 is arranged in the second mounting hole. The second shaft 155 and the second mounting hole can be in key connection or the like, so as to drive the second filter screen 164 to rotate by the second shaft 155. The lower end of the second shaft 155 is connected with the second gear 152. The lower end of the second shaft 155 is arranged in the bottom wall of the filtering cavity 102 and is provided with a bearing and an oil seal.

[0070] As shown in FIG. 3, in some embodiments, the slag collecting and filtering device 10 further comprises a first flow disturbing member 1631 arranged in the filtering cavity 102, which is used to agitate the washing water in the filtering cavity 102. The first flow disturbing member 1631 can be connected to the lower end of the first filter screen 163 and comprises a plurality of first blades distributed along the circumference of the first filter screen 163. As shown in FIG. 3 and FIG. 9, the slag collecting and filtering device 10 further comprises a second flow disturbing member 1641 arranged in the slag collecting cavity 103, which is used to agitate the water and residue in the slag collecting cavity 103. The second flow disturbing member 1641 can be connected to the lower end of the second filter screen 164 and comprises a plurality of second blades distributed along the circumference of the second filter screen 164.

[0071] In some embodiments, as shown in FIG. 8, the first filter screen 163 is in a cylindrical shape, and the circumferential wall of the first filter screen 163 is used for filtering. The filtering area of the first filter screen 163 can be increased. In combination with the aforementioned first filter screen 163, the first filter screen 163 is rotatably arranged around the axis of the first filter screen 163 in the filtering cavity 102, and the inner space of the first filter screen 163 is opposite to the first outlet 1022. As shown in FIG. 9, the second filter screen 164 can be in a cylindrical shape, and the circumferential wall of the second filter screen 164 is used for filtering. The inner space of the second filter screen 164 is connected to the second outlet 1032, and the outer space of the second filter screen 164 is connected to the second inlet 1031 and the residue outlet 1033. The filtering area of the second filter screen 164 can be increased. In combination with the aforementioned second filter screen 164, the second filter screen 164 is rotatably arranged around the axis of the second filter screen 164 in the residue collecting cavity 103, and the inner space of the second filter screen 164 is opposite to the second outlet 1032.

[0072] In some embodiments, the mesh size of the first filter screen 163 is not less than 0.1 mm and not more than 1 mm. When the first filter screen 163 is rotatable and the rotating speed is high (for example, greater than 1000 rpm), the mesh size of the first filter screen 163 can be appropriately increased. Alternatively, the mesh size of the first filter screen 163 is not less than 0.6 mm and not more than 1 mm. For example, the mesh size of the first filter screen 163 can be 0.1 mm, 0.2 mm, 0.35 mm, 0.5 mm, 0.6 mm, 0.75 mm or 1 mm, etc. Of course, when the rotating speed of the first filter screen 163 is low (for example, not more than 1000 rpm), the mesh size of the first filter screen 163 can be appropriately reduced.

[0073] In some embodiments, the mesh size of the second filter screen 164 is not less than 0.1 mm and not more than 1 mm. When the second filter screen 164 is rotatable and the rotating speed is high (for example, greater than 1000 rpm), the mesh size of the second filter screen 164 can be appropriately increased. Alternatively, the mesh size of the second filter screen 164 is not less than 0.6 mm and not more than 1 mm. For example, the mesh size of the second filter screen 164 can be 0.1 mm, 0.2 mm, 0.35 mm, 0.5 mm, 0.6 mm, 0.75 mm or 1 mm, etc. Of course, when the rotating speed of the second filter screen 164 is low (for example, not more than 1000 rpm), the mesh size of the second filter screen 164 can be appropriately reduced.

[0074] In some embodiments, as shown in FIG. 10, the filtering cavity 102 is provided with a vent hole communicating with the outside space of the slag collecting and filtering device 10 for balancing the air pressure inside and outside the filtering cavity 102; and / or, the slag collecting cavity 103 is closed at other positions except the second inlet 1031 and the second outlet 1032 when the slag collecting and filtering device 10 is filtering. Optionally, a vent hole 1023 is further provided between the water collecting cavity 101 and the filtering cavity 102. The vent hole 1023 communicates with the outside space of the slag collecting and filtering device 10 for balancing the air pressure inside and outside the filtering cavity 102, wherein the vent hole 1023 can be arranged at the upper end of the circumferential wall of the filtering cavity 102. This can facilitate the washing water to be discharged into the filtering cavity 102, and facilitate the washing water to be filtered by the slag collecting and filtering device 10, thereby effectively improving the filtering efficiency and effect. In addition, the vent hole 1023 is higher than the first inlet 1021 and / or the vent hole 1023 is not lower than the second inlet 1031, which can reduce the possibility of the vent hole 1023 being blocked. In addition, the slag collecting cavity 103 is closed at other positions except the second inlet 1031 and the second outlet 1032 when the slag collecting and filtering device 10 is filtering, which can facilitate the formation of a relatively high pressure environment in the slag collecting cavity 103, so as to reduce the water entering the slag collecting cavity 103, and can achieve the retention of the residues in the slag collecting cavity 103, thereby improving the filtering efficiency and effect of the slag collecting and filtering device 10.

[0075] The dishwasher according to the embodiments of the present application comprises the slag collecting and filtering device 10 as described above.

[0076] In combination with FIGS. 1 to 10, the slag collecting and filtering device 10 of the present application can comprise a water collecting cavity 101, a filtering cavity 102, a slag collecting cavity 103, a circulating pump 12, a drainage pump 13, a water distribution valve 1111 and the like. The slag collecting and filtering device 10 has a multi-stage filtering function. The multi-stage filtering is mainly achieved by using a planar filter screen 161, a filter cup 162, a first filter screen 163, a second filter screen 164, a circulating pump 12, a driving member 14, a transmission assembly 15 and the like.

[0077] Specifically, the first-stage filtering system comprises the planar filter screen 161 and the filter cup 162. During the cleaning process, after the water washes the surface of the tableware, the water carries the residues to the bottom of the cleaning cavity, flows through the planar filter screen 161, and is collected in the water collecting cavity 101. The residues smaller than the aperture size of the planar filter screen 161 (the aperture size of the planar filter screen 161 is 0.5-2 mm) enter the filtering cavity 102. The residues larger than the aperture size of the planar filter screen 161 enter the filter cup 162.

[0078] The filter cup 162 has two aperture sizes, the side aperture size of the filter cup 162 is small, which can be set to 0.5-3mm. The bottom aperture size of the filter cup 162 is large, which can be set to 5-10mm. The residue larger than the bottom aperture size of the filter cup 162 needs to be cleaned manually. The residue smaller than the bottom aperture size of the filter cup 162 and larger than the side aperture size is discharged by the drainage pump 13 when draining. The residue smaller than the side aperture size of the filter cup 162 enters the filtering cavity 102. The first-stage filtration realizes the filtration of the residue larger than 3mm.

[0079] The second-stage filtration system is composed of the first filter screen 163 and the second filter screen 164. The aperture sizes of the first filter screen 163 and the second filter screen 164 can be the same or different. The water and residue entering the filtering cavity 102 are filtered by the first filter screen 163, the tiny particles smaller than the first filter screen 163 can penetrate the filter screen and enter the circulating pump 12 with the water. The residue larger than the first filter screen 163 (the size is 0.1-3mm) enters the residue collecting cavity 103. When draining, the residue in the residue collecting cavity 103 is discharged by the drainage pump 13.

[0080] The first filter screen 163 and the second filter screen 164 of the second-stage filtration are driven to rotate by the driving member 14 and the transmission assembly 15. Under the action of the centrifugal force, the residue is separated from the filter screen.

[0081] In the present application, the first filter screen 163 and / or the second filter screen 164 can be rotatable, and centrifugal separation is utilized.

[0082] Specifically, the water filtered by the first filter enters the filtering cavity 102, and the first filter screen 163 rotates at high speed under the drive of the driving member 14 (e.g., a motor). The high-speed rotation of the first filter screen 163 separates the contaminants attached to the outer surface of the first filter screen 163 from the filter screen, so that the first filter screen 163 has better water permeability. The first filter screen 163 is provided with first blades, and the rotation of the first blades pushes water to wash the surface of the first filter screen 163, accelerates the separation of the residues from the filter screen, and makes the cleaning of the filter screen more thorough. In addition, the first inlet 1021 is arranged on the peripheral surface of the filtering cavity 102, the first outlet 1022 is arranged on the bottom surface of the filtering cavity 102, and the second inlet 1031 is arranged on the peripheral surface of the filtering cavity 102. When the circulating pump 12 is working, the water in the filtering cavity 102 is sucked into the pump cavity of the circulating pump 12. A low-pressure area is formed at the first outlet 1022, the outside of the filter screen of the filtering cavity 102 is a relatively high-pressure area, and the position of the first inlet 1021 is a relatively high-pressure area; a low-pressure area is formed at the second outlet 1032, and the position of the second inlet 1031 is a relatively high-pressure area. Therefore, part of the water enters the second outlet 1032 through the residue collecting cavity 103. The contaminants outside the first filter screen 163 are pushed by the water flow to the second inlet 1031 and enter the residue collecting cavity 103 through the second inlet 1031. Since the water flow in the residue collecting cavity 103 is slow, and the second filter screen 164 is arranged at the second outlet 1032, the contaminants are collected in the residue collecting cavity 103, the residue collecting function is realized, the contaminants are separated from the circulating water, and therefore, the water used for cleaning tableware is always clean water, avoiding secondary pollution of the tableware. In addition, the cleaning module is also arranged to clean the first filter screen 163, and the first filter screen 163 is cleaned through the functions of micro-filtration of the circulating water and centrifugal cleaning of the filter screen.

[0083] In addition, during the cleaning process, the water filtered by the first filter enters the residue collecting cavity 103 from the second inlet 1031 through the filtering cavity 102, the residues are collected in the residue collecting cavity 103, and are separated from the main circulating water, so that the residue and water are separated. To solve the problem that the residues block the second filter screen 164, the second filter screen 164 is provided with second blades at the bottom, the second filter screen 164 is driven to rotate by the motor, the water flow driven by the second blades washes the surface of the filter screen, so that the residues are separated from the surface of the filter screen. When the water is drained, the second filter screen 164 rotates, the second flow disturbing member 1641 stirs the water in the residue collecting cavity 103 to move, so that the residues and the water move together, and the residues are discharged through the residue discharge port 1033 of the residue collecting cavity 103. The residue collecting cavity 103 can realize the functions of residue collecting and residue and water separating.

[0084] The residue collecting and filtering device 10 can separate the residues from the circulating water, realize clean water cleaning, avoid secondary pollution, automatically clean the filter screen through centrifugal separation, and does not need to be maintained by people. The water pump output can be stabilized, and the working efficiency of the water pump can be improved. The residues can be more easily discharged after being collected. All the filter screens can be conveniently taken out and maintained.

[0085] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0086] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0087] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0088] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through 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.

[0089] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0090] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A slag collecting filter device (10) for a dishwasher, wherein, The slag collecting and filtering device (10) comprises: a filtering cavity (102) having a first inlet (1021) for washing water and a first outlet (1022), and separating residues and water in the washing water; a slag collecting cavity (103) having a second inlet (1031) communicating with the filtering cavity (102) and a second outlet (1032) for collecting the residues separated by the filtering cavity (102); wherein the slag collecting and filtering device (10) further comprises a circulating pump (12), a first flow channel is arranged between the inlet of the circulating pump (12) and the first outlet (1022), a second flow channel is arranged between the inlet of the circulating pump (12) and the second outlet (1032), and the flow resistance from the filtering cavity (102) to the circulating pump (12) is smaller than the flow resistance from the slag collecting cavity (103) to the circulating pump (12).

2. The slag filtering device (10) according to claim 1, wherein The length L1 of the first flow channel is smaller than the length L2 of the second flow channel.

3. The slag filtering device (10) according to claim 2, wherein L2 / L1≥1.

1.

4. The slag filtering device (10) according to any one of claims 1-3, wherein The negative pressure value P1 of the negative pressure generated at the first outlet (1022) when the circulating pump (12) is working is greater than the negative pressure value P2 of the negative pressure generated at the second outlet (1032).

5. The slag filtering device (10) according to claim 4, wherein P1 / P2≥1.

1.

6. The slag filtering device (10) according to any one of claims 1-5, wherein The minimum cross-sectional area S1 of the first flow channel is greater than the minimum cross-sectional area S2 of the second flow channel.

7. The slag filtering device (10) according to claim 6, wherein S1 / S2≥1.

1.

8. The slag filtering device (10) according to any one of claims 1-7, wherein The first flow channel and the second flow channel are parallel to each other; or, the first outlet (1022), the second outlet (1032) and the inlet of the circulating pump (12) communicate through a same pump flow channel (1121), and the first flow channel and the second flow channel are arranged in the pump flow channel (1121).

9. The slag filtering device (10) according to any one of claims 1-8, wherein The slag collecting and filtering device (10) comprises a water cup (11) comprising a cup body (111) and a flow channel plate (112), the flow channel plate (112) covers the lower part of the cup body (111), the first outlet (1022) and the second outlet (1032) are arranged on the flow channel plate (112), and at least a part of the first flow channel and / or at least a part of the second flow channel are arranged on the flow channel plate (112).

10. The slag filtering device (10) according to claim 9, wherein The flow channel plate (112) is further provided with a pump interface for communicating with the circulating pump (12), the first flow channel is connected between the pump interface and the first outlet (1022), and the second flow channel is connected between the pump interface and the second outlet (1032).

11. The slag filtering device (10) according to any one of claims 1-10, wherein The filter cavity (102) is provided with a first filter screen (163), the first inlet (1021) and the second inlet (1031) are arranged on one side of the first filter screen (163), and the first outlet (1022) is arranged on the other side of the first filter screen (163); the slag collecting cavity (103) is provided with a second filter screen (164), the second inlet (1031) is arranged on one side of the second filter screen (164), and the second outlet (1032) is arranged on the other side of the second filter screen (164).

12. The slag filtering device (10) according to claim 11, wherein The filtering flow rate Q1 of the first filter screen (163) is greater than the filtering flow rate Q2 of the second filter screen (164).

13. The slag filtering device (10) according to claim 12, wherein Q1 / Q2≥2.

14. The slag filtering device (10) according to any one of claims 1-13, wherein The filter cavity (102) is provided with a vent hole, which communicates with the external space of the slag collecting and filtering device (10) to balance the internal and external air pressures of the filter cavity (102); And / or, the slag collecting cavity (103) is closed at other positions except the second inlet (1031) and the second outlet (1032) during the filtering of the slag collecting and filtering device (10).

15. The slag filtering device (10) according to any one of claims 1-14, wherein The slag collecting cavity (103) is also provided with a slag discharge port (1033), and the slag collecting and filtering device (10) further comprises a drainage pump (13) and a one-way valve (17), the one-way valve (17) is used to open and close the slag discharge port (1033), and the drainage pump (13) is connected to the slag discharge port (1033) when the one-way valve (17) is opened.

16. A dishwasher, wherein, The slag collecting and filtering device (10) according to any one of claims 1-15. The slag collecting and filtering device (10) according to any one of claims 1-15.

Images