CN111643026A - Washing system of dishwasher and control method thereof - Google Patents
Washing system of dishwasher and control method thereof Download PDFInfo
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- CN111643026A CN111643026A CN202010560005.5A CN202010560005A CN111643026A CN 111643026 A CN111643026 A CN 111643026A CN 202010560005 A CN202010560005 A CN 202010560005A CN 111643026 A CN111643026 A CN 111643026A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
- A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
- A47L15/22—Rotary spraying devices
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
- A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4278—Nozzles
- A47L15/428—Rotary nozzles
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/4291—Recovery arrangements, e.g. for the recovery of energy or water
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/34—Other automatic detections
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/02—Water discharge, e.g. opening or closure of discharge valve
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/36—Other output
Abstract
The invention discloses a washing system of dish washer and its control method, the washing system includes: the washing unit is provided with a washing cavity and a water outlet, and the water outlet is communicated with the washing cavity; the washing unit comprises a washing pump, the washing pump is used for pumping water discharged from the water outlet into the washing cavity and/or the water return tank, a pressure switch is arranged at the outlet of the washing pump and used for controlling the washing pump to continuously work when the water quantity of the water in the water return tank entering the washing cavity reaches the preset water quantity and the washing pump works. According to the washing system of the dish-washing machine, provided by the embodiment of the invention, high-quality washing water in the washing cavity can be pumped into the return water tank, part of energy consumption is saved in the subsequent washing process, whether water exists in the washing cavity or enough water is used for washing is judged through the action of the pressure switch, a flow meter and the like are not required to be arranged, the detection is convenient and reliable, and the control is convenient.
Description
Technical Field
The invention relates to the technical field of washing appliances, in particular to a washing system of a dish washing machine and a control method thereof.
Background
The household dish washer is an intelligent household appliance product for replacing manual washing of tableware, and in the working process of the dish washer for washing the tableware, washing water is conveyed to each rotary spraying arm through the washing pump, so that the tableware is continuously covered and sprayed for washing, and the purpose of cleaning the tableware is achieved. In order to further shorten the washing time of the dishwasher, the existing dishwasher washing system adopts a mode of arranging an electric heater to increase the temperature of the washing water. Under the action of the circulating spraying of the washing water, the high-temperature washing water washes away pollutants on the tableware and brings heat to the tableware, so that the dish-washing machine can obtain higher cleaning rate and drying rate in shorter washing time. The conventional operation of the dishwasher has a plurality of stages, in which the washing water of the stage is discharged at the end of each stage, however, a part of the discharged washing water may be high quality water containing less contaminants, and the direct discharge has a problem of energy waste, and there is room for improvement.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a washing system of a dishwasher, which has a simple structure, can achieve an energy saving effect, and has a good user experience.
The invention also provides a control method of the washing system of the dishwasher.
A washing system of a dishwasher according to an embodiment of a first aspect of the present invention includes: the washing unit is provided with a washing cavity and a water outlet, and the water outlet is communicated with the washing cavity; the washing unit comprises a washing pump, the washing pump is used for pumping water discharged from the water outlet into the washing cavity and/or the water return tank, a pressure switch is arranged at an outlet of the washing pump and is used for controlling the washing pump to continuously work when the water quantity of the water in the water return tank entering the washing cavity reaches a preset water quantity and the washing pump works.
According to the washing system of the dish washing machine, the return water tank is arranged, so that high-quality washing water in the washing cavity can be pumped into the return water tank under the action of the washing pump, water stored in the return water tank can be used in the subsequent washing process, the temperature of the high-quality washing water in the return water tank is higher than that of conventional inlet water, part of energy consumption can be saved, or the water in the return water tank is used in the next washing process, and due to the fact that the placement time is sufficient, heat exchange is carried out with the environment, the temperature of the water in the return water tank is increased, and the energy consumption can be saved when the water is initially placed; whether water exists in the washing cavity or enough water is used for washing is judged through the action of the pressure switch, a flow meter and the like are not needed, the detection is convenient and reliable, and the control is convenient.
According to the washing system of the dishwasher, the washing unit comprises the shunt valve, the shunt valve is communicated with the outlet of the washing pump through a first pipeline, and the pressure switch is arranged on the first pipeline.
According to the washing system of the dishwasher of the embodiment of the present invention, the pressure switch is integrated with the washing pump.
The washing system of the dishwasher according to the embodiment of the present invention further includes: and a second pipeline is arranged between the outlet of the washing pump and the water return port, and the cut-off valve is arranged on the second pipeline and used for controlling the on-off of the second pipeline.
Specifically, the washing pump is adapted to pump the water of the washing unit into the return water tank in a state where the cut-off valve is opened and the washing pump is operated; in a state where the cut-off valve is opened and the washing pump does not operate, the water of the water return tank is adapted to flow to the washing unit.
According to the washing system of the dish washing machine, the water return water tank is arranged on the side wall of the washing unit and is provided with the overflow port communicated with the washing cavity, and the overflow port is positioned above the water return port.
According to the washing system of the dishwasher of the embodiment of the invention, the washing unit further comprises a water discharge pump, and the washing pump is suitable for being started after the water discharge pump works for the preset water discharge time so as to pump the water of the washing unit into the water return water tank.
A control method of a washing system of a dishwasher according to an embodiment of the second aspect of the present invention, the dishwasher comprising a washing phase and a rinsing phase, the control method comprising the steps of: controlling the water in the backwater water tank to flow to the washing unit in the washing stage or the rinsing stage; controlling the washing pump to work; and detecting the action of the pressure switch, and controlling the washing pump to continuously work.
According to the control method of the washing system of the dish washing machine, the return water tank is arranged, so that high-quality washing water in the washing cavity can be pumped into the return water tank under the action of the washing pump, water stored in the return water tank can be used in the subsequent washing process, the temperature of the high-quality washing water in the return water tank is higher than that of conventional inlet water, partial energy consumption can be saved, or the water in the return water tank is used in the next washing process, and the energy consumption can be saved when the water is initially placed due to the fact that the placement time is sufficient, heat exchange is carried out between the water and the environment, the temperature of the water in the return water tank is increased; whether water exists in the washing cavity or enough water is used for washing is judged through the action of the pressure switch, a flow meter and the like are not needed, the detection is convenient and reliable, and the control is convenient.
According to the control method of the washing system of the dishwasher of the embodiment of the invention, after the starting of the washing pump, the method further comprises the following steps: and when the pressure switch is detected to be not actuated or the pressure switch is intermittently actuated, the washing pump is controlled to stop working and the water inlet unit is controlled to supplement water to the washing unit.
According to the control method of the washing system of the dishwasher, after the water inlet unit is controlled to supplement water to the washing unit for the first preset time, the washing pump is controlled to work again.
According to the control method of the washing system of the dish washing machine provided by the embodiment of the invention, a cut-off valve is arranged between the outlet of the washing pump and the water return port of the water return tank, and the method for controlling the water in the water return tank to flow to the washing system comprises the following steps: and controlling the cut-off valve to be opened until all water in the water return water tank flows to the washing unit.
According to the control method of the washing system of the dish washing machine provided by the embodiment of the invention, a cut-off valve is arranged between the outlet of the washing pump and the water return port of the water return tank, and the control method further comprises the following steps: in the rinsing stage, controlling the work of a drainage pump; and after the drainage pump works for a preset drainage time, controlling the washing pump to work and controlling the cut-off valve to be opened so as to pump the water of the washing unit into the water return tank.
Further, the control method further includes: controlling the shut-off valve to close after the washing pump operates for a second predetermined time; and controlling the washing pump to stop running.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a washing system of a dishwasher according to an embodiment of the present invention;
FIG. 2 is a schematic view of a washing system of a dishwasher according to another embodiment of the present invention;
FIG. 3 is a flow chart of a method of controlling a washing system of a dishwasher according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method of controlling a washing system of a dishwasher according to another embodiment of the present invention;
fig. 5 is a flowchart of a control method of a washing system of a dishwasher according to still another embodiment of the present invention.
Reference numerals:
the washing system (100) is provided with a washing unit,
a washing unit 10, a washing chamber 11, a water outlet 12, a shunt valve 13, a first pipeline 14, a second pipeline 15,
a backwater water tank 20, a backwater port 21, an overflow port 22,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A washing system 100 of a dishwasher according to an embodiment of the present invention is described below with reference to fig. 1 to 5.
As shown in fig. 1 to 5, a washing system 100 of a dishwasher according to an embodiment of the present invention includes: the washing unit 10 is provided with a washing cavity 11 and a water outlet 12, the water outlet 12 is communicated with the washing cavity 11, the water return tank 20 is provided with a water return port 21, the water return port 21 is suitable for being communicated with the water outlet 12, the washing unit 10 comprises a washing pump 30, the washing pump 30 can pump high-quality water in the washing cavity 11 into the water return tank 20, or the washing pump 30 pumps the water flowing into the washing cavity 11 into a spray arm in the washing cavity 11 for spraying and washing tableware.
Wherein, the exit of washing pump 30 is equipped with pressure switch 40, and the water in the return water tank 20 can get into and wash the use in the washing chamber 11, and at this moment, pressure switch 40 can detect the pressure of washing pump 30 exit water, obtains the information that the water yield is sufficient when pressure switch 40 moves, and then control washing pump 30 and continue work.
According to the washing system 100 of the dish washing machine, the backwater water tank 20 is arranged, so that high-quality washing water in the washing cavity 11 can be pumped into the backwater water tank 20 under the action of the washing pump 30, water stored in the backwater water tank 20 can be used in the subsequent washing process, the temperature of the high-quality washing water in the backwater water tank 20 is higher than that of conventional inlet water, partial energy consumption can be saved, or the water in the backwater water tank 20 is used in the next washing process, and the energy consumption can be saved when the water is initially placed in the backwater water tank 20 due to the fact that the water is placed for enough time and exchanges heat with the environment, the temperature of the water in the backwater water; whether water exists in the washing cavity or enough water is used for washing is judged through the action of the pressure switch 40, a flow meter and the like are not needed, and the washing machine is convenient and reliable to detect and convenient to control.
When the pressure switch 40 is not operated or the pressure switch 40 is intermittently operated, the information that the water quantity is not enough to meet the washing operation of a certain stage is obtained, the water quantity needs to be supplemented, thereby controlling the washing pump 30 to stop working and controlling the water inlet unit, which may be an external water source, that is, external water is directly supplied into the washing chamber 11, the water inlet unit may be a water storage tank (not shown) located at a side portion of the washing unit 10, and water stored in the water storage tank is supplied to the washing chamber during a long-term storage, or the temperature is raised along with the heating of the washing unit 10 so that the water temperature in the water storage tank is higher than the water temperature of the water source, thereby when the water storage tank supplies water to the washing unit 10, because the water temperature is relatively high, the tableware can be better cleaned, or the energy consumption is reduced, and the preheating and energy saving effects are realized.
As shown in fig. 1, according to an embodiment of the present invention, the washing unit 10 includes a shunt valve 13, the shunt valve 13 is communicated with an outlet of the washing pump 30 through a first pipe 14, a pressure switch 40 is disposed on the first pipe 14, and the pressure switch 40 is disposed adjacent to the washing pump 30, under the action of the washing pump 30, water flowing out of the washing pump 30 acts on the pressure switch 40, and in a state that the water amount is sufficient, the pressure switch 40 is actuated, so that the washing pump 30 can be controlled to operate continuously, and when the pressure switch 40 is intermittently actuated or not actuated, information that the water amount is insufficient to satisfy a washing operation at a certain stage is obtained, a water replenishment amount is required, so that the washing pump 30 is controlled to stop operating, and the water inlet unit is controlled to supply water into the washing chamber 11.
As shown in fig. 2, according to an embodiment of the present invention, the pressure switch 40 is integrated with the washing pump 30, and the pressure switch 40 can detect the water pressure at the outlet of the washing pump 30 more timely and reliably, so that on one hand, the overall structure is simpler, the number of system components is reduced, and the assembly is convenient, and on the other hand, the detection accuracy can be improved, thereby omitting the structural components such as the flow meter, and ensuring the stability and reliability of the structure.
As shown in fig. 1 and 2, according to an embodiment of the present invention, the washing system 100 further includes: the cut-off valve 50, a second pipeline 15 is arranged between the outlet of the washing pump 30 and the water return port 21, the second pipeline 15 can be a branch on the first pipeline 14, and the cut-off valve 50 is arranged on the second pipeline 15 and used for controlling the on-off of the second pipeline 15.
Specifically, in a state where the cut-off valve 50 is opened and the washing pump 30 is operated, water in the washing unit 10 may be pumped into the return water tank 20 through the water outlet 12, the cut-off valve 50, and the return water port 21; in a state where the cut-off valve 50 is opened and the washing pump 30 is not operated, the water of the return water tank 20 is adapted to flow to the washing unit 10 so that the water in the return water tank 20 can be reused. The return water tank 20 is located above the water outlet 12, so that water in the return water tank 20 can flow out under the action of self weight, structural members such as a pump do not need to be additionally arranged, the cost is reduced, and meanwhile, the complexity of control is reduced.
In addition, the water is supplemented to the water return tank 20 by controlling the working duration of the washing pump 30, and the pumping amount of the washing pump 30 in unit time is determined, so that the water amount pumped into the water return tank 20 can be controlled by controlling the time, a flow meter is not needed for judging the water supplement amount, and the stability of the water supplementing level is met.
As shown in fig. 1 and 2, according to an embodiment of the present invention, the backwater tank 20 is disposed on a side wall of the washing unit 10, the backwater tank 20 has an overflow port 22 communicated with the washing chamber 11, and the overflow port 22 is located above the backwater port 21, so that when the amount of water in the backwater tank 20 is excessive, the water can flow into the washing unit 10 through the overflow port 22, a flow meter is not required to determine the water level, the risk of overflow to other structural members due to excessive amount of water in the backwater tank 20 is also avoided, and the use experience of a user is improved.
As shown in fig. 1 and 2, according to an embodiment of the present invention, the washing unit 10 further includes a drain pump 60, after the drain pump 60 operates for a preset drain time, the washing pump 30 is activated to pump the water of the washing unit 10 into the return water tank 20, that is, before the washing water is supplied to the return water tank 20, part of the dirty water and the residue are drained by the drain pump 60, and then the water is replenished, so as to ensure that the water entering the return water tank 20 is high-quality water, and the quality of the washing water is judged without a sensor, a thermometer, and other structural components, thereby reducing the number of parts, and simultaneously saving the cost through a control logic, and improving the stability and reliability of the washing system 100.
As shown in fig. 3, a method for controlling a washing system of a dishwasher according to an embodiment of the present invention, the dishwasher including a washing stage and a rinsing stage, the method comprising the steps of: in the washing stage or the rinsing stage, controlling the water in the backwater water tank to flow to the washing unit; then controlling the washing pump to work, and simultaneously detecting the water pressure at the outlet of the washing pump by a pressure switch; and when the pressure switch is detected to act, the information that the water quantity is sufficient is obtained, and then the washing pump is controlled to continuously work.
According to the control method of the washing system of the dish washing machine, the return water tank is arranged, so that high-quality washing water in the washing cavity can be pumped into the return water tank under the action of the washing pump, water stored in the return water tank can be used in the subsequent washing process, the temperature of the high-quality washing water in the return water tank is higher than that of conventional inlet water, partial energy consumption can be saved, or the water in the return water tank is used in the next washing process, and the energy consumption can be saved when the water is initially placed due to the fact that the placement time is sufficient, heat exchange is carried out between the water and the environment, the temperature of the water in the return water tank is increased; whether water exists in the washing cavity or enough water is used for washing is judged through the action of the pressure switch, a flow meter and the like are not needed, the detection is convenient and reliable, and the control is convenient.
According to the control method of the washing system of the dishwasher, after the washing pump is started to work, if the pressure switch is detected to be not operated or the pressure switch is intermittently operated, the information that the water quantity is not enough to meet the washing operation at a certain stage is obtained, the water quantity needs to be supplemented, the washing pump is controlled to stop working, and the water inlet unit is controlled to supplement water to the washing unit. The water inlet unit can be an external water source, namely, external water is directly supplied into the washing cavity, the water inlet unit can also be a water storage tank (not shown in the figure), the water storage tank is positioned at the side part of the washing unit, water stored in the water storage tank is stored for a long time or is heated when the washing unit is heated, so that the water temperature in the water storage tank is higher than that of the water source, therefore, when the water storage tank supplies water to the washing unit, because the water temperature is relatively higher, better cleaning effect can be realized on tableware, or energy consumption is reduced, and the preheating and energy saving effects are realized.
And further, after the water inlet unit is controlled to supply water to the washing unit for the first preset time, the water supply is finished, the water amount in the washing cavity is sufficient, and at the moment, the washing pump is controlled to work again, so that the water in the washing cavity is sprayed circularly to wash or rinse the tableware.
As shown in fig. 4, the method for controlling a washing system of a dishwasher according to an embodiment of the present invention, in which a shut-off valve is disposed between an outlet of a washing pump and a return port of a return water tank, and controlling water in the return water tank to flow to the washing system includes: and controlling the cut-off valve to be opened until the water in the return water tank completely flows to the washing unit, specifically, controlling the cut-off valve to be opened so that the water in the return water tank can flow into the washing unit under the action of gravity, and controlling the cut-off valve to be closed after the water in the return water tank completely flows to the washing unit, wherein the cut-off valve can be controlled by time.
Further, after the cut-off valve is closed, the washing pump is controlled to work, and meanwhile, the pressure switch detects the water pressure at the outlet of the washing pump; when the pressure switch is detected to act, the information that the water quantity is sufficient is obtained, and then the washing pump is controlled to work continuously; when the pressure switch is detected to be not actuated or the pressure switch is intermittently actuated, the information that the water quantity is not enough to meet the washing operation at a certain stage is obtained, the water quantity needs to be supplemented, the washing pump is controlled to stop working, the water inlet unit is controlled to supplement water to the washing unit, the washing pump is controlled to work again after the water supplement is completed, and then the washing at the next stage is carried out.
As shown in fig. 5, according to the control method of the washing system of the dishwasher according to the embodiment of the present invention, a shut-off valve is provided between the outlet of the washing pump and the return water port of the return water tank, and the control method further includes: controlling the drainage pump to work when the washing cavity drains water in the rinsing stage; after the drainage time is preset during the work of the drainage pump, the washing pump is controlled to work, and meanwhile, the cut-off valve is controlled to be opened so as to pump the water of the washing unit into the return water tank, and the water is supplemented by the return water tank, so that the high-quality washing water in the washing cavity can be pumped into the return water tank, and the water stored in the return water tank can be used in the subsequent washing process or the next washing process.
Further, after the washing pump operates for a second preset time, the cut-off valve is controlled to be closed; and then the washing pump is controlled to stop running, and the stop valve is controlled to be closed preferentially, so that water in the return water tank can be prevented from flowing into the washing cavity, and the water storage effect of the return water tank is ensured. The water is supplemented to the water return tank by controlling the working duration of the washing pump, and the pumping amount of the washing pump in unit time is determined, so that the water amount pumped into the water return tank can be controlled by controlling the time, the water supplement amount is not required to be judged by a flow meter, and the stability of the water supplementing level is met.
Other constructions and operations of the washing system of the dishwasher according to embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on" or "over" the second feature includes the first feature being directly on or diagonally above the second feature, or merely indicating that the first feature is at a higher level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A washing system of a dishwasher, comprising:
the washing unit is provided with a washing cavity and a water outlet, and the water outlet is communicated with the washing cavity;
a water return tank, the water return tank is provided with a water return port, the water return port is suitable for being communicated with the water outlet,
the washing unit comprises a washing pump, the washing pump is used for pumping water discharged from the water outlet into the washing cavity and/or the water return water tank, and a pressure switch is arranged at the outlet of the washing pump and used for controlling the washing pump to continuously work when the water quantity of the water in the water return water tank entering the washing cavity reaches a preset water quantity and the washing pump works.
2. The washing system of a dishwasher of claim 1, wherein the washing unit comprises a shunt valve in communication with an outlet of the washing pump via a first line, the pressure switch being provided in the first line.
3. The washing system of a dishwasher of claim 1, wherein the pressure switch is integrated into the wash pump.
4. The washing system of a dishwasher of claim 1, further comprising: and a second pipeline is arranged between the outlet of the washing pump and the water return port, and the cut-off valve is arranged on the second pipeline and used for controlling the on-off of the second pipeline.
5. The washing system of a dishwasher of claim 4, wherein,
the washing pump is suitable for pumping water of the washing unit into the water return water tank under the state that the cut-off valve is opened and the washing pump works;
in a state where the cut-off valve is opened and the washing pump does not operate, the water of the water return tank is adapted to flow to the washing unit.
6. The washing system of a dishwasher of claim 1, wherein the return water tank is provided at a side wall of the washing unit, and the return water tank has an overflow port communicating with the washing chamber, the overflow port being located above the return water port.
7. The washing system of a dishwasher of claim 1, wherein the washing unit further comprises a drain pump, the washing pump being adapted to be activated to pump water of the washing unit into the water return tank after the drain pump is operated for a preset drain time.
8. A control method of a washing system of a dishwasher according to any one of claims 1-7, characterized in that the dishwasher comprises a washing phase and a rinsing phase, the control method comprising the steps of:
controlling the water in the backwater water tank to flow to the washing unit in the washing stage or the rinsing stage;
controlling the washing pump to work;
and detecting the action of the pressure switch, and controlling the washing pump to continuously work.
9. The method for controlling a washing system of a dishwasher according to claim 8, further comprising, after the starting of the washing pump, the steps of:
and when the pressure switch is detected to be not actuated or the pressure switch is intermittently actuated, the washing pump is controlled to stop working and the water inlet unit is controlled to supplement water to the washing unit.
10. The method of claim 9, wherein the operation of the washing pump is controlled again after the water inlet unit is controlled to supply water to the washing unit for a first predetermined time.
11. The control method of a washing system of a dishwasher of claim 8, wherein a shut-off valve is provided between an outlet of the washing pump and a return water port of the return water tank,
the controlling of the water flow in the return water tank to the washing system includes:
and controlling the cut-off valve to be opened until all water in the water return water tank flows to the washing unit.
12. The control method of a washing system of a dishwasher of claim 8, wherein a shut-off valve is provided between an outlet of the washing pump and a return water port of the return water tank, the control method further comprising:
in the rinsing stage, controlling the work of a drainage pump;
and after the drainage pump works for a preset drainage time, controlling the washing pump to work and controlling the cut-off valve to be opened so as to pump the water of the washing unit into the water return tank.
13. The control method of a washing system of a dishwasher of claim 12, further comprising:
controlling the shut-off valve to close after the washing pump operates for a second predetermined time;
and controlling the washing pump to stop running.
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| CN202010560005.5A CN111643026A (en) | 2020-06-18 | 2020-06-18 | Washing system of dishwasher and control method thereof |
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