Dishwasher with water circuit system and control method thereof

Abstract

The present invention proposes a dishwasher with a water system and a control method thereof, comprising a dishwasher body, a water cup arranged on the dishwasher body and a water system connected with the water cup, wherein a first filtering structure is arranged on the water cup, and the water system comprises a water inlet pipe, a first water outlet pipe, a second water outlet pipe and a spray pipe, wherein the water inlet end of the water inlet pipe is connected with the water cup, the water outlet end of the water inlet pipe can be selectively connected with the water inlet end of the first water outlet pipe and the water inlet end of the second water outlet pipe, the water outlet end of the first water outlet pipe is connected with the spray pipe, the water outlet end of the second water outlet pipe is connected with the dishwasher body or the water cup, and a second filtering structure is arranged on the second water outlet pipe. Secondary contamination of the dishes is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular to a dishwasher with a water channel system and a control method thereof. Background Art

[0002] As an emerging household appliance, dishwashers are attracting more and more attention from the general public, and the degree of cleanliness, as a key factor, has become a top priority. During the washing process of the dishwasher, secondary pollution in the indicators that affect the degree of cleanliness is a difficult problem to deal with in the industry. If the mesh size of the water cup filter is too large, fine residues will pass through the filter and return to the tableware through the water channel, causing secondary pollution. If the mesh size of the filter is too small, it will affect the water flow. The pressure generated by the spray arm of the dishwasher is too small, and the washing purpose cannot be achieved. The usual way to reduce secondary pollution is to fill the dishwasher with water multiple times, rinse it, and use clean water to rinse the residue out of the dishwasher. Summary of the invention

[0003] The present invention solves one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention aims to provide a dishwasher with a water system to avoid secondary contamination of bowls.

[0004] The above purpose is achieved through the following technical solutions:

[0005] A dishwasher with a water system comprises a dishwasher body, a water cup arranged on the dishwasher body and a water system connected with the water cup, wherein a first filtering structure is arranged on the water cup, and the water system comprises a water inlet pipe, a first water outlet pipe, a second water outlet pipe and a spray pipe, wherein a water inlet end of the water inlet pipe is connected with the water cup, a water outlet end of the water inlet pipe can be selectively connected with a water inlet end of the first water outlet pipe and a water inlet end of the second water outlet pipe, a water outlet end of the first water outlet pipe is connected with the spray pipe, a water outlet end of the second water outlet pipe is connected with the dishwasher body or the water cup, and a second filtering structure is arranged on the second water outlet pipe.

[0006] As a further improvement of the present invention, a turbidity sensor is further included, and the turbidity sensor is arranged on the water cup and below the first filtering structure.

[0007] As a further improvement of the present invention, the first filtering structure is a first filter screen, the second filtering structure is a second filter screen, and the mesh number of the first filter screen is greater than the mesh number of the second filter screen.

[0008] As a further improvement of the present invention, the second water outlet pipe includes a first connecting water section, a second connecting water section and a filtering water section, one end of the first connecting water section is connected to the water inlet pipe, the other end of the first connecting water section is connected to one end of the filtering water section, the other end of the filtering water section is connected to one end of the second connecting water section, the other end of the second connecting water section is connected to the dishwasher body, the filtering water section is sunken, and the second filtering structure is arranged in the filtering water section.

[0009] As a further improvement of the present invention, the filtered water section includes a lower water section and an upper water section, one end of the lower water section is connected to the first connecting water section, and the other end is connected to one end of the upper water section, the other end of the upper water section is connected to the second connecting water section, and the lower water section is inclined downward from one end close to the first connecting water section to one end close to the upper water section, and the upper water section is inclined upward from one end close to the lower water section to one end close to the second connecting water section.

[0010] As a further improvement of the present invention, the second filtering structure is arranged on the water supply section.

[0011] As a further improvement of the present invention, it also includes a flushing water pipe, one end of which is connected to the first connecting water section, and the other end of which is connected to the sewer.

[0012] As a further improvement of the present invention, it also includes a main drainage pipe, a first drainage branch pipe and a second drainage branch pipe. The water inlet end of the main drainage pipe is connected to the water cup, the water outlet end of the main drainage pipe is respectively connected to the water inlet end of the first drainage branch pipe and the water inlet end of the second drainage branch pipe, the water outlet end of the first drainage branch pipe is connected to the second connecting water section, and the water outlet end of the second drainage branch pipe is connected to the sewer.

[0013] Another object of the present invention is to provide a control method for a dishwasher to avoid secondary contamination of dishes.

[0014] A control method for a dishwasher is applied to the above-mentioned dishwasher with a water system, and is characterized by comprising the following steps:

[0015] Step S101, entering the washing program, detecting the turbidity value of the washing water, and determining whether the turbidity value is greater than a first preset value;

[0016] If yes, go to step S102; if no, go to step S103;

[0017] Step S102, controlling the water inlet pipe to be connected to the second water outlet pipe;

[0018] Step S103, controlling the water inlet pipe to be connected to the first water outlet pipe.

[0019] As a further improvement of the present invention, the following steps are further included after step S102:

[0020] Step S104, detecting whether the turbidity value is less than a second preset value, wherein the second preset value is less than the first preset value;

[0021] If yes, proceed to step S103; if no, return to step S102.

[0022] As a further improvement of the present invention, 11. after step S103, the following steps are also included:

[0023] Step S105, detecting whether the washing process is completed;

[0024] If yes, go to step S106; if no, return to step S101;

[0025] Step S106, detecting whether the second filter structure needs to be flushed;

[0026] If yes, go to step S107; if no, go to step S108;

[0027] Step S107, connecting the water cup to the rear end of the second water outlet pipe, and connecting the front end of the second water outlet pipe to the sewer;

[0028] Step S108, connecting the water cup to the sewer.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] 1. The present invention provides a dishwasher with a water system. When the water inlet pipe is connected to the first water outlet pipe, the bowls in the dishwasher body can be rinsed. When the water inlet pipe is connected to the second water outlet pipe, the washing water can be filtered through the first filter structure and the second filter structure. The bowls in the dishwasher body can be rinsed while ensuring the cleanliness of the washing water, thereby ensuring the washing effect and avoiding secondary contamination of the bowls.

[0031] 2. The present invention proposes a control method for a dishwasher. When the water inlet pipe is connected to the first water outlet pipe, the bowls in the dishwasher body can be rinsed. When the water inlet pipe is connected to the second water outlet pipe, the washing water can be filtered through the first filter structure and the second filter structure. The bowls in the dishwasher body can be rinsed while ensuring the cleanliness of the washing water, thereby ensuring the washing effect and avoiding secondary contamination of the bowls. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a dishwasher with a water system in an embodiment;

[0033] Figure 2 A schematic diagram of a dishwasher with a water system in the embodiment during the cleaning phase;

[0034] Figure 3 A schematic diagram of a dishwasher with a water system filtering washing water in an embodiment;

[0035] Figure 4 A schematic diagram of a dishwasher with a water system in a rinsing stage according to an embodiment;

[0036] Figure 5 The figure is a flow chart of a method for controlling a dishwasher in an embodiment. DETAILED DESCRIPTION

[0037] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0038] Embodiment 1:

[0039] See also Figure 1-4 A dishwasher with a water system 3 is shown, comprising a dishwasher body 1, a water cup 2 arranged on the dishwasher body 1 and a water system 3 connected to the water cup 2, wherein a first filter structure 21 is arranged on the water cup 2, and the water system 3 comprises a water inlet pipe 31, a first water outlet pipe 32, a second water outlet pipe 33 and a spray pipe 34, wherein a water inlet end of the water inlet pipe 31 is connected to the water cup 2, a water outlet pipe of the water inlet pipe 31 can selectively be connected to a water inlet end of the first water outlet pipe 32 and a water inlet end of the second water outlet pipe 33, a water outlet end of the first water outlet pipe 32 is connected to the spray pipe 34, a water outlet end of the second water outlet pipe 33 is connected to the dishwasher body 1 or the water cup 2, and a second filter structure 4 is arranged on the second water outlet pipe 33.

[0040] The present invention provides a dishwasher with a water system 3, which can filter the washing water to avoid the situation that too many impurities in the washing water cause the dishes in the dishwasher body 1 to be not rinsed cleanly. When the water inlet pipe 31 is connected to the first water outlet pipe 32, the dishes in the dishwasher body 1 can be rinsed. When the water inlet pipe 31 is connected to the second water outlet pipe 33, the washing water can be filtered through the first filter structure 21 and the second filter structure 4, and the dishes in the dishwasher body 1 can be rinsed while ensuring the cleanliness of the washing water, thereby ensuring the washing effect and avoiding secondary contamination of the dishes.

[0041] In this embodiment, the connection point between the water outlet end of the second water outlet pipe 33 and the dishwasher body 1 is at the bottom of the dishwasher body 1, so as to prevent the water flowing out of the second water outlet pipe 33 from affecting the tableware placed in the dishwasher body 1. In other embodiments, the water outlet end of the second water outlet pipe 33 is connected to the water cup 2, and the connection point between the water outlet end of the second water outlet pipe 33 and the water cup 2 is at the upper end of the water cup.

[0042] A selective connection device may be provided at the connection point between the water inlet pipe 31 and the first water outlet pipe 32 and the second water outlet pipe 33, so that the water inlet pipe 31 can be selectively connected to the first water outlet pipe 32 or the second water outlet pipe 33. In this embodiment, a washing water valve 5 is provided at the connection point between the water inlet pipe 31 and the first water outlet pipe 32 and the second water outlet pipe 33. The washing water valve 5 is a three-way valve, which can connect the water inlet pipe 31 with the first water outlet pipe 32, or connect the water inlet pipe 31 with the second water outlet pipe 33. The water in the dishwasher body 1 flows into the water cup 2, and enters the water inlet pipe 31 after being filtered by the first filter structure 21 in the water cup 2. The water entering the water inlet pipe 31 can enter the first water outlet pipe 32 or the second water outlet pipe 33.

[0043] In this embodiment, the dishwasher has a cleaning stage, a rinsing stage and a draining stage.

[0044] A turbidity sensor 22 is also provided in the water cup 2, and the turbidity sensor 22 is below the first filtering structure 21. Preferably, the turbidity sensor 22 is provided at the bottom of the water cup 2.

[0045] A washing pump 311 is provided on the water inlet pipe 31. When the dishwasher enters the cleaning stage, the washing pump 311 is turned on, and the washing water valve 5 connects the water inlet pipe 31 and the first water outlet pipe 32. The washing water entering the dishwasher body 1 flows out from the water outlet on the dishwasher body 1 into the water cup 2, and then flows from the water inlet pipe 31 into the first water outlet pipe 32, and enters the spray pipe 34 through the first water outlet pipe 32. Figure 2 The tableware in the dishwasher body 1 is rinsed by the spray pipe 34, and the washing water after rinsing the tableware re-enters the water cup 2, and the turbidity sensor 22 in the water cup 2 detects the turbidity value of the washing water in real time.

[0046] When the turbidity value is less than the first preset value, the water inlet pipe 31 and the first water outlet pipe 32 are kept connected, and the water entering the water cup 2 flows through the water inlet pipe 31 and the first water outlet pipe 32 and is sprayed out from the spray pipe 34 to circulate and rinse the tableware in the dishwasher body 1.

[0047] When the turbidity sensor 22 detects that the turbidity is greater than the first preset value, a filter water valve 6 is provided at the connection point between the second water outlet pipe 33 and the dishwasher body 1. The opening and closing of the filter water valve 6 can connect or cut off the second water outlet pipe 33 and the dishwasher body 1. The wash water valve 5 connects the water inlet pipe 31 and the second water outlet pipe 33, and connects the second water outlet pipe 33 and the dishwasher body 1 through the filter water valve 6. The wash water entering the water cup 2 flows back to the bottom of the dishwasher body 1 through the water inlet pipe 31 and the second water outlet pipe 33, as shown in FIG. Figure 3 Since the second filter structure 4 is provided in the second water outlet pipe 33, the washing water with excessive turbidity value is filtered by the second filter structure 4 and then enters the bottom of the dishwasher body 1. At this time, the washing water stops flushing the dishes in the dishwasher body 1 and performs double filtering on the washing water. When the turbidity sensor 22 in the water cup 2 detects that the turbidity value of the washing water is reduced to less than the second preset value, it is considered that the washing water meets the conditions for washing dishes. Then, the water inlet pipe 31 and the first water outlet pipe 32 are connected through the washing water valve 5, and the second water outlet pipe 33 and the dishwasher body 1 are controlled to be cut off. The water flowing into the water cup 2 flows into the water inlet pipe 31 and then enters the first water outlet pipe 32. After entering the spray pipe 34 from the first water outlet pipe 32, the tableware in the dishwasher body 1 is flushed through the spray pipe 34.

[0048] The second preset value is smaller than the first preset value. The first preset value is 500-700 NTU. The second preset value is 350-450 NTU.

[0049] The first filtering structure 21 is a first filter screen, the second filtering structure 4 is a second filter screen, and the mesh number of the first filter screen is greater than the mesh number of the second filter screen.

[0050] The first filter screen is a 60-100 mesh filter screen, and the second filter screen is a 20-40 mesh filter screen. After the washing water enters the water cup 2 and is filtered by the first filter screen, the turbidity can be detected by the turbidity sensor 22 in the water cup 2.

[0051] During the washing stage, washing water flows from the dishwasher body 1 into the water cup 2, is filtered through the first filter in the water cup 2, and enters the spray pipe 34 through the water inlet pipe 31 and the first water outlet pipe 32. The tableware in the dishwasher body 1 is rinsed by the spray pipe 34. If the turbidity sensor 22 detects that the turbidity is less than the first preset value, it is considered that the cleanliness of the washing water meets the requirements for washing dishes. The water inlet pipe 31 and the first water outlet pipe 32 are kept connected, and the dishes in the dishwasher body 1 are circulated and rinsed by the washing water.

[0052] If the turbidity sensor 22 detects that the turbidity is greater than the first preset value, it means that the washing water is relatively turbid and contains relatively many dirty particles. The washing water filtered only by the first filter can no longer meet the washing requirements. At this time, the water inlet pipe 31 and the second water outlet pipe 33 are controlled to be connected, and the washing water flows to the second water outlet pipe 33, and is filtered through the second filter in the second water outlet pipe 33 to reduce the dirty particles in the washing water, so that the washing water is clean, and the problem of washing dishes not being cleaned by washing water with poor cleanliness and high turbidity value is avoided. The mesh number of the first filter is larger than the mesh number of the second filter, so as to ensure the filtering effect, avoid the problem that the mesh number of the second filter is larger than the mesh number of the first filter, resulting in poor filtering effect, and also avoid the problem that the mesh number of the first filter structure 21 is too small, which affects the water flow during the washing process, and the pressure generated by the spray arm of the dishwasher is too small, so that washing cannot be achieved.

[0053] When the washing water circulates through the water cup 2, the water inlet pipe 31, the second water outlet pipe 33, and the bottom of the dishwasher body 1 until the turbidity value of the washing water is reduced to less than the second preset value, it is considered that the washing water meets the washing requirements again, and the washing water is no longer filtered. The tableware in the dishwasher can be rinsed with the washing water again. At this time, the water inlet pipe 31 and the first water outlet pipe 32 are controlled to be connected, and the washing water is sprayed through the water inlet pipe 31, the first water outlet pipe 32, and the spray pipe 34 to spray the tableware in the dishwasher. The second preset value is less than the first preset value, and the bowls in the dishwasher body 1 are rinsed again after the cleanliness of the washing water is guaranteed. It also avoids the situation that when the first preset value is equal to the second preset value, the washing water quickly reaches the preset turbidity after rinsing the bowls when the washing water meets the cleanliness of washing again, and the washing water needs to be double-filtered again, which can avoid the problem of repeated switching of washing and filtering.

[0054] The second water outlet pipe 33 includes a first connecting water section 331, a second connecting water section 332 and a filtering water section 333. One end of the first connecting water section 311 is connected to the water inlet pipe 31, the other end of the first connecting water section 331 is connected to one end of the filtering water section 333, the other end of the filtering water section 333 is connected to one end of the second connecting water section 332, and the other end of the second connecting water section 332 is connected to the dishwasher body 1. The filtering water section 333 is sunken, and the second filtering structure 4 is arranged in the filtering water section 333.

[0055] The filtered water section 333 includes a lower water section 3331 and an upper water section 3332. One end of the lower water section 3331 is connected to the first connected water section 311, and the other end is connected to one end of the upper water section 3332. The other end of the upper water section 3332 is connected to the second connected water section 332. The lower water section 3331 is tilted downward from one end close to the first connected water section 331 to one end close to the upper water section 3332. The upper water section 3332 is tilted upward from one end close to the lower water section 3331 to one end close to the second connected water section 332. In this embodiment, the cross-sections of the lower water section 3331 and the upper water section 3332 are "U" shaped, and may also be "V" shaped in some embodiments. When the flowing water enters the second water outlet pipe 33, it will flow into the bottom of the dishwasher body 1 after passing through the first connected water section 331, the lower water section 3331, the upper water section 3332 and the second connected water section 332 in sequence. And preferably, the first connecting water section 331 and the second connecting water section 332 are arranged horizontally and on the same horizontal plane.

[0056] In this embodiment, the second filter structure 4 is arranged on the upper water section 3332. When the flowing water enters the lower water end and the upper water section 3332, after being filtered by the second filter structure 4 on the upper water section 3332, the filtered residue will be retained on the second filter structure 4, or retained at the connection between the upper water section 3332 and the lower water section 3331, which can effectively prevent the residue from entering the second connected water section 332. Preferably, the filtered water valve 6 is provided at the connection between the second connected water section 332 and the dishwasher body 1. The opening and closing of the filtered water valve 6 can connect or cut off the second connected water section 332 and the dishwasher body 1.

[0057] It also includes a drainage main pipe 71, a first drainage branch pipe 72 and a second drainage branch pipe 73. The water inlet end of the drainage main pipe 71 is connected to the water cup 2, and the water outlet end of the drainage main pipe 71 is connected to the water inlet end of the first drainage branch pipe 72 and the water inlet end of the second drainage branch pipe 73 respectively. The water outlet end of the first drainage branch pipe 72 is connected to the second connecting water section 332, and the water outlet end of the second drainage branch pipe 73 is connected to the sewer 74.

[0058] The main drainage pipe 71 is provided with a drainage pump 712 .

[0059] Preferably, the water outlet end of the first drainage branch pipe 72 is connected to the second connecting water section 332 and between the filtered water section 333 and the filtered water valve 6 .

[0060] A drainage valve 711 is provided at the connection between the drainage main pipe 71 and the first drainage branch pipe 72 and the second drainage branch pipe 73. The drainage valve 711 can connect the drainage main pipe 71 with the first drainage branch pipe 72 or connect the drainage main pipe 71 with the second drainage branch pipe 73.

[0061] After the washing stage, the dishwasher enters the rinsing stage or the draining stage. The rinsing stage is to rinse the second filter structure 4 to ensure the cleanliness of the second filter structure 4.

[0062] If the dishwasher is in the drainage stage, the washing pump 311 stops working, the drainage pump 712 starts working, the drainage valve 711 connects the drainage main pipe 71 and the second drainage branch pipe 73, and the washing water enters the drainage main pipe 71 through the water cup 2, enters the second drainage branch pipe 73 through the drainage main pipe 71, and enters the sewer 74 through the second drainage branch pipe 73 to be drained.

[0063] It also includes a flushing water pipe 8, one end of which is connected to the first connecting water section 331, and the other end is connected to the sewer 74. A flushing water valve 81 is provided on the flushing water pipe 8. The flushing water valve 81 can be opened or closed to connect or cut off the flushing water pipe 8.

[0064] If the dishwasher enters the rinsing stage, it means that the second filter structure 4 needs to be rinsed. At this time, the drainage main pipe 71 and the first drainage branch pipe 72 are connected, the flushing water valve 81 is controlled to be opened, and the filtering water valve 6 is closed. Figure 4 The washing water can flow out from the drainage main pipe 71 and enter the second connecting water section 332 through the first drainage branch pipe 72. The flowing water entering the second connecting water section 332 enters the upper water section 3332 and enters the lower water section 3331 through the upper water section 3332 to reversely flush the second filter structure 4. The impurities retained on the second filter structure 4 or retained at the connection between the upper water section 3332 and the lower water end can enter the flushing water pipe 8 with the reverse flushing water flow, and flow to the sewer 74 through the flushing water pipe 8 to discharge the impurities.

[0065] The device further comprises a controller, which is electrically connected to the washing pump 311, the drain pump 712, the washing water valve 5, the filtering water valve 6, the flushing water valve 81 and the drain water valve 711. The electrical connection includes a wired connection and a wireless connection.

[0066] Embodiment 2:

[0067] like Figure 5 A method for controlling a dishwasher is applied to a dishwasher having a water system as described in Embodiment 1, and comprises the following steps:

[0068] Step S101, entering the washing program, detecting the turbidity value of the washing water, and determining whether the turbidity value is greater than a first preset value;

[0069] If yes, go to step S102; if no, go to step S103;

[0070] Step S102, controlling the water inlet pipe to be connected to the second water outlet pipe;

[0071] Step S103, controlling the water inlet pipe to be connected to the first water outlet pipe.

[0072] During the cleaning of the dishwasher, the tableware in the dishwasher is circulated and rinsed by washing water. During the process of circulating and rinsing the washing water, the turbidity of the washing water will increase due to the cleaning. A first filtering structure and a turbidity sensor are provided in the water cup of the dishwasher. The washing water is filtered by the first filtering structure in the water cup. Preferably, the turbidity sensor is arranged below the first filtering structure. When the turbidity of the washing water is detected by the turbidity sensor after being filtered by the first structure, if the turbidity value is still greater than the first preset value, it means that the washing water needs to be filtered again. At this time, the water inlet pipe is controlled to be connected with the second water outlet pipe to filter the washing water. If the turbidity value of the washing water is less than the first preset value when the turbidity sensor detects the turbidity of the washing water after being filtered by the first structure, the water inlet pipe and the first water outlet pipe are connected, and the washing water enters the water cup from the dishwasher body, enters the spray pipe after passing through the water inlet pipe and the first water outlet pipe, and is sprayed out from the spray pipe again to rinse the tableware in the dishwasher body.

[0073] In this embodiment, the first preset value in step S101 is 350-450 NTU, preferably 400 NTU.

[0074] After step S102, the following steps are also included:

[0075] Step S104, detecting whether the turbidity value is less than a second preset value, wherein the second preset value is less than the first preset value;

[0076] If yes, proceed to step S103; if no, return to step S102.

[0077] In step S102, the washing water is filtered, and the turbidity sensor detects the turbidity value of the washing water in real time. When the turbidity value of the washing water is less than a second preset value, the water inlet pipe and the first water outlet pipe are connected, and the washing water enters the water cup from the dishwasher body, and enters the spray pipe after passing through the water inlet pipe and the first water outlet pipe, and is sprayed out from the spray pipe again to rinse the tableware in the dishwasher body.

[0078] In this embodiment, the first preset value in step S104 is 500-700 NTU, preferably 600 NTU.

[0079] After step S103, the following steps are also included:

[0080] Step S105, detecting whether the washing process is completed;

[0081] If yes, go to step S106; if no, return to step S101;

[0082] Step S106, detecting whether the second filter structure needs to be flushed;

[0083] If yes, go to step S107; if no, go to step S108;

[0084] Step S107, connecting the water cup to the rear end of the second water outlet pipe, and connecting the front end of the second water outlet pipe to the sewer;

[0085] Step S108, connecting the water cup to the sewer.

[0086] After the washing process is completed, the washing machine is selected to enter the draining process or the rinsing process, wherein step S107 is the rinsing process and step S108 is the draining process.

[0087] It also includes a drainage main pipe, a first drainage branch pipe and a second drainage branch pipe. The water inlet end of the drainage main pipe is connected to the water cup, the water outlet end of the drainage main pipe is connected to the water inlet end of the first drainage branch pipe and the water inlet end of the second drainage branch pipe respectively, the water outlet end of the first drainage branch pipe is connected to the second connecting water section, and the water outlet end of the second drainage branch pipe is connected to the sewer.

[0088] In step S108, the water cup is connected to the sewer, that is, the main drainage pipe is connected to the second drainage branch pipe, and the water flowing into the water cup from the dishwasher body is discharged to the sewer through the main drainage pipe and the second drainage branch pipe.

[0089] In step S107, the cup is connected to the rear end of the second water outlet pipe, and the front end of the second water outlet pipe is connected to the sewer. The second water outlet pipe is divided into a first connecting water section, a second connecting water section, a lower water section, and an upper water section, one end of the first connecting water section is connected to the water inlet pipe, the other end of the first connecting water section is connected to one end of the lower water end, the other end of the lower water section is connected to one end of the upper water section, the other end of the upper water section is connected to one end of the second connecting water section, and the other end of the second connecting water section is connected to the dishwasher body.

[0090] The water cup is connected to the rear end of the second water outlet pipe, that is, the water cup is connected to the second connecting water section of the second water outlet pipe through the main drainage pipe and the first drainage branch pipe, so that the washing water in the dishwasher body flows into the water cup and then flows into the second connecting water section of the second water outlet pipe through the main drainage pipe and the first drainage branch pipe.

[0091] It also includes a flushing water pipe, one end of which is connected to the first connecting water section, and the other end of which is connected to the sewer. The front end of the second water outlet pipe is connected to the sewer, that is, the first connecting water section of the second water outlet pipe is connected to the flushing water pipe, so that the water entering the second connecting water section of the second water outlet pipe flows in reverse order to the upper water section, the lower water section, and the first connecting water section, and then is discharged to the sewer through the flushing water pipe.

[0092] Before step S101, a pre-cleaning procedure is also included. When the pre-cleaning procedure is entered, the water inlet pipe is controlled to be connected to the first water outlet pipe, and the washing water is sprayed from the spray pipe into the dishwasher body to pre-rinse the dishes, then enters the water inlet pipe through the water cup, and then returns to the spray pipe through the water inlet pipe. When the pre-cleaning procedure is completed, the drainage main pipe is controlled to be connected to the second drainage branch pipe to discharge the pre-cleaned washing water. Performing the pre-cleaning procedure before entering the washing procedure can reduce the turbidity of the washing water during the washing procedure.

[0093] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.

Claims

1. A dishwasher having a water system (3), characterized in that: The dishwasher comprises a dishwasher body (1), a water cup (2) arranged on the dishwasher body (1), and a water system (3) in communication with the water cup (2); a first filtering structure (21) is arranged on the water cup (2); the water system (3) comprises a water inlet pipe (31), a first water outlet pipe (32), a second water outlet pipe (33), and a spray pipe (34); the water inlet end of the water inlet pipe (31) is in communication with the water cup (2); the water outlet end of the water inlet pipe (31) can be selectively in communication with the water inlet end of the first water outlet pipe (32) and the water inlet end of the second water outlet pipe (33); the water outlet end of the first water outlet pipe (32) is in communication with the spray pipe (34); the water outlet end of the second water outlet pipe (33) is in communication with the dishwasher body (1) or the water cup (2); and a second filtering structure (4) is arranged on the second water outlet pipe (33); It also comprises a turbidity sensor (22), wherein the turbidity sensor (22) is arranged on the water cup (2) and below the first filtering structure (21); The control method of the dishwasher with a water system comprises the following steps: Step S101, entering the washing program, detecting the turbidity value of the washing water, and determining whether the turbidity value is greater than a first preset value; If yes, go to step S102; if no, go to step S103; Step S102, controlling the water inlet pipe to be connected to the second water outlet pipe; Step S103, controlling the water inlet pipe to be connected to the first water outlet pipe.

2. A dishwasher with a water system (3) according to claim 1, characterized in that: The first filtering structure (21) is a first filter screen, the second filtering structure (4) is a second filter screen, and the mesh number of the first filter screen is greater than the mesh number of the second filter screen.

3. A dishwasher with a water system (3) according to claim 1, characterized in that: The second water outlet pipe (33) comprises a first communicating water section (331), a second communicating water section (332) and a filtering water section (333); one end of the first communicating water section (331) is in communication with the water inlet pipe (31); the other end of the first communicating water section (331) is in communication with one end of the filtering water section (333); the other end of the filtering water section (333) is in communication with one end of the second communicating water section (332); the other end of the second communicating water section (332) is in communication with the dishwasher body (1); the filtering water section (333) is in a sunken type; and the second filtering structure (4) is arranged in the filtering water section (333).

4. A dishwasher with a water system (3) according to claim 3, characterized in that: The filtered water section (333) comprises a lower water section (3331) and an upper water section (3332); one end of the lower water section (3331) is connected to the first connected water section (331), and the other end is connected to one end of the upper water section (3332); the other end of the upper water section (3332) is connected to the second connected water section (332); and the lower water section (3331) is inclined downward from one end close to the first connected water section (331) to one end close to the upper water section (3332); and the upper water section (3332) is inclined upward from one end close to the lower water section (3331) to one end close to the second connected water section (332).

5. A dishwasher with a water system (3) according to claim 4, characterized in that: The second filtering structure (4) is arranged on the water supply section (3332).

6. A dishwasher with a water system (3) according to claim 3, characterized in that: It also comprises a flushing water pipe (8), one end of which is connected to the first connecting water section (331), and the other end of which is connected to the sewer.

7. A dishwasher with a water system (3) according to claim 3, characterized in that: It also includes a drainage main pipe (71), a first drainage branch pipe (72) and a second drainage branch pipe (73); the water inlet end of the drainage main pipe (71) is connected to the water cup (2); the water outlet end of the drainage main pipe (71) is connected to the water inlet end of the first drainage branch pipe (72) and the water inlet end of the second drainage branch pipe (73), respectively; the water outlet end of the first drainage branch pipe (72) is connected to the second connecting water section (332); and the water outlet end of the second drainage branch pipe (73) is connected to a sewer.

8. A dishwasher with a water system (3) according to any one of claims 1 to 7, characterized in that: After step S102, the following steps are also included: Step S104, detecting whether the turbidity value is less than a second preset value, wherein the second preset value is less than the first preset value; If yes, proceed to step S103; if no, return to step S102.

9. A dishwasher with a water system (3) according to claim 8, characterized in that: After step S103, the following steps are also included: Step S105, detecting whether the washing process is completed; If yes, go to step S106; if no, return to step S101; Step S106, detecting whether the second filter structure needs to be flushed; If yes, go to step S107; if no, go to step S108; Step S107, connecting the water cup to the rear end of the second water outlet pipe, and connecting the front end of the second water outlet pipe to the sewer; Step S108, connecting the water cup to the sewer.

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