CN109497902B - Dish washing machine and drainage fault detection method thereof - Google Patents
Dish washing machine and drainage fault detection method thereof Download PDFInfo
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- CN109497902B CN109497902B CN201811531777.5A CN201811531777A CN109497902B CN 109497902 B CN109497902 B CN 109497902B CN 201811531777 A CN201811531777 A CN 201811531777A CN 109497902 B CN109497902 B CN 109497902B
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- 238000004851 dishwashing Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 title claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 230000002159 abnormal effect Effects 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000005406 washing Methods 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims 2
- 230000007257 malfunction Effects 0.000 claims 1
- 208000028659 discharge Diseases 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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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
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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
- A47L15/4223—Devices for water discharge, e.g. devices to prevent siphoning, non-return valves
Abstract
The invention discloses a method for detecting a drainage fault of a dish washing machine and the dish washing machine, wherein the method for detecting the drainage fault of the dish washing machine comprises the following steps: starting a draining stage of the dishwasher; acquiring the state of a pressure switch in a drainage stage or after the drainage stage of the dish-washing machine; and judging whether the water drainage of the dishwasher is abnormal or not according to the state of the pressure switch. The method for detecting the drainage fault of the dish washing machine and the dish washing machine can detect the drainage pump fault in time and give an alarm to remind a user of maintaining in time.
Description
Technical Field
The invention relates to the field of kitchen appliances, in particular to a method for detecting a drainage fault of a dish washing machine and the dish washing machine.
Background
At present, a dish washing machine is widely used in places such as restaurants, families and the like where various kinds of tableware need to be used, so as to wash the tableware in batches and improve the tableware washing efficiency. The existing dish-washing machine needs to discharge sewage through the drainage pump and then wash the sewage after water enters the dish-washing machine, once the drainage pump is blocked or damaged, the sewage overflows the machine, and damages are caused to equipment and the environment.
Disclosure of Invention
In order to solve the technical problem, the invention provides a drainage fault detection method of a dish washing machine and the dish washing machine, which can detect the drainage pump fault in time and give an alarm to remind a user of maintenance in time.
In order to achieve the object of the present invention, in a first aspect, the present invention provides a drain fault detecting method of a dishwasher, comprising:
starting a draining stage of the dishwasher;
acquiring the state of a pressure switch in a drainage stage or after the drainage stage of the dish-washing machine;
and judging whether the water drainage of the dishwasher is abnormal or not according to the state of the pressure switch.
In a second aspect, the present invention provides a dishwasher, comprising:
a cavity for receiving washing water;
the circulating branch is communicated with the cavity;
the drainage branch is communicated with the cavity;
the pressure switch is used for detecting the water pressure in the circulating branch and/or the drainage branch;
the acquisition module is used for acquiring the state of a pressure switch in the drainage stage of the dishwasher;
and the judging module is used for judging whether the drainage of the dishwasher is abnormal or not according to the state of the pressure switch.
In at least one embodiment of the present invention, a method for detecting a drain fault of a dishwasher and a dishwasher are provided to determine whether drain is abnormal by detecting a state of a pressure switch during or after a drain phase. The drainage pump fault can be detected in time and an alarm is given, and a user is reminded of maintaining in time.
In some embodiments of the present invention, the pressure switch is located on the circulation branch of the circulation pump, and the following effects can be achieved: 1. after the water discharge stage, the open or close state of the pressure switch is detected by starting the circulating pump to judge whether the water discharge is abnormal. 2. After the drainage stage, the open or close state of the pressure switch is detected by starting the circulating pump, and when the pressure switch is in the open state, the judgment step of operating the circulating pump for y seconds is repeated for n times after the drainage pump operates for x seconds, and then the open or close state of the pressure switch is detected again to judge whether the drainage is abnormal.
In some embodiments of the present invention, the pressure switch is located on the drainage branch of the drainage pump, and the following effects can be achieved: 3. the drainage process may be performed in stages, and the open or closed state of the pressure switch is detected in the second stage of drainage to determine whether the drainage is abnormal. 4. The drainage process can be carried out in stages, and whether the duration z of the on state of the pressure switch is greater than or equal to the preset duration a or not is detected in the second drainage stage so as to judge whether the drainage is abnormal or not. 5. And timing from the start of the work of the drainage pump, and detecting the time length m of the pressure switch in the opening state to judge whether the drainage is abnormal.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic flow chart of a drainage fault detection method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a drainage fault detection method according to a second embodiment of the present invention;
fig. 3 is a schematic flow chart of a drainage fault detection method according to a third embodiment of the present invention;
fig. 4 is a schematic flow chart of a drainage fault detection method according to a fourth embodiment of the present invention;
fig. 5 is a schematic flow chart of a drainage fault detection method according to a fifth embodiment of the present invention;
fig. 6 is a schematic flow chart of a drainage fault detection method according to a sixth embodiment of the present invention;
fig. 7 is a schematic structural diagram of a pressure switch located on a circulation branch of a circulation pump according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
The embodiment of the invention provides a method for detecting a drainage fault of a dish washing machine and the dish washing machine. The drainage pump fault can be detected in time and an alarm is given, and a user is reminded of maintaining in time.
Fig. 1 is a schematic flow chart of a drainage fault detection method according to an embodiment of the present invention, and as shown in fig. 1, the drainage fault detection method according to the embodiment of the present invention includes:
s101: the dishwasher drain phase is initiated.
In this embodiment, the detection of the drain fault is accomplished mainly at the drain stage of the dishwasher. Wherein, the principle of implementing the starting of the draining stage of the dishwasher is the same as the prior art, and the detailed description of the embodiment is omitted here.
The execution main body in the embodiments of the present invention and the following embodiments is a dishwasher, and may specifically be a main control Unit of the dishwasher, such as a micro controller Unit (MCU for short).
S102: the state of the pressure switch in the drainage stage or after the drainage stage of the dishwasher is obtained.
In this embodiment, whether the water discharge stage is abnormal or not is determined by detecting the open or closed state of the pressure switch. The pressure switch can be connected with the circulating pump or the drainage pump, and can realize the detection of the pressure switch at different stages of drainage according to the position of the pressure switch, and the detection method specifically comprises the following two realization modes:
the first implementation mode comprises the following steps: the pressure switch is positioned on a circulation branch of the circulating pump, and after the drainage stage is finished, the circulating pump is started to detect the state of the pressure switch.
The second implementation mode comprises the following steps: the pressure switch is located on the drainage branch of the drainage pump, and the state of the pressure switch is detected in the drainage stage.
Wherein, when the water pressure is greater than or equal to A kpa, the pressure switch is opened; and when the water pressure is less than A kpa, the pressure switch is closed. Akpa is the minimum water pressure to open the pressure switch.
S103: and judging whether the water drainage of the dishwasher is abnormal or not according to the state of the pressure switch.
In this embodiment, in the drainage stage or after the drainage stage, if the duration of the pressure switch being in the on state or the on state is greater than the preset value, drainage is abnormal. Specifically, if the drainage is normal, there is not ponding in the dish washer cavity, and there is not water pressure to lead to pressure switch to open, and pressure switch is in the closure state, judges that the drainage is normal this moment. If the drainage pump has a fault and the cavity is accumulated with water, the pressure switch is opened due to the water pressure generated by the circulating pump or the drainage pump, and therefore the fault of the drainage pump is judged.
According to the drainage fault detection method provided by the embodiment of the invention, in the drainage process, whether drainage is abnormal or not is judged by detecting the state of the pressure switch in the drainage stage or after the drainage stage. The drainage pump fault can be detected in time and an alarm is given, and a user is reminded of maintaining in time.
The pressure switch of the embodiment of the invention is positioned on the circulation branch of the circulating pump, and after the drainage stage is finished, the circulating pump is started to detect the state of the pressure switch. Fig. 2 is a schematic flow chart of a drainage fault detection method provided in the second embodiment of the present invention, and as shown in fig. 2, the drainage fault detection method provided in the second embodiment of the present invention may include:
s201: drainage is started.
S202: and controlling the drainage pump to work for x seconds.
S203: and controlling the circulating pump to work for y seconds.
In this embodiment, S203 is executed after S202 is executed.
In this embodiment, obtaining the state of the pressure switch after the draining stage of the dishwasher may include: and after the drainage pump works for x seconds, controlling the circulating pump to work for y seconds, and acquiring the state of a pressure switch when the circulating pump works.
Wherein x is greater than 0, y is greater than 0, and x is the shortest time that the drain pump discharged the water in the cavity, and y is the shortest time that circulating pump circulating water produced water pressure.
In the drainage stage, the drainage pump works for x seconds firstly, and then the circulating pump works for y seconds. After the drainage pump drains water, if water is accumulated in the cavity, the pressure switch is in an open state due to water pressure when the circulating pump works, so that the drainage abnormality and the drainage pump fault are judged. If the drainage is normal, no water is accumulated in the cavity of the dish washing machine, no water is in the circulating pump, and therefore no water pressure causes the pressure switch to be opened, and the pressure switch is in a closed state, so that the drainage is judged to be normal.
In practical application, the actual drainage time of the drainage pump can be longer than x seconds, and the actual working time of the circulating pump can be longer than y seconds.
S204: and judging whether the pressure switch is closed or not. If so, draining normally, and ending; if not, the drainage is abnormal, and the user is warned or prompted by sound and light to maintain.
In this embodiment, the judging whether the drain of the dishwasher is abnormal according to the state of the pressure switch may include: when the pressure switch is not in the closed state, the abnormal drainage of the dishwasher is judged.
Specifically, after the drainage stage, the pressure switch is turned on when the circulating pump works, the MCU receives a pressure switch turn-on signal, judges that drainage is abnormal, and gives an alarm or gives an audible and visual prompt to a user for maintenance.
In the embodiment, after the alarm of abnormal drainage is judged, the drainage pump is closed, the circulating pump and the water inlet pump are closed, the machine is prevented from being damaged and overflowing is prevented, and meanwhile, the sound-light alarm prompts a user to maintain.
According to the drainage fault detection method provided by the embodiment of the invention, the pressure switch is positioned on the circulation branch of the circulating pump, and after the drainage stage, the circulating pump is started to detect the opening or closing state of the pressure switch so as to judge whether drainage is abnormal.
Further, in the embodiment shown in fig. 2, before determining that the drain of the dishwasher is abnormal after the pressure switch is not in the closed state, the drain fault detection method provided by the embodiment of the present invention may further include: controlling the drainage pump to work for x seconds and the circulating pump to work for y seconds, and obtaining the state of the pressure switch when the circulating pump works again after circulating for n times; wherein n is an integer greater than 1; x > y.
Specifically, fig. 3 is a schematic flow chart of a drainage fault detection method provided by a third embodiment of the present invention, and as shown in fig. 3, the drainage fault detection method provided by the third embodiment of the present invention may include:
and S301, starting draining.
And S302, controlling the drainage pump to work for x seconds.
And S303, controlling the circulating pump to work for y seconds.
And S304, judging whether the pressure switch is closed or not. If so, draining normally, and ending; if not, S305 is executed.
In this embodiment, the implementation methods of S301 to S304 are the same as those of S201 to S204 in the above embodiment, and the description of this embodiment is omitted here.
S305: and detecting whether the repeated times of circulation and drainage are more than the set n. If yes, abnormal drainage is performed, and a user is warned or prompted by sound and light to maintain; if not, go to step S302.
In this embodiment, MCU lets behind the pressure switch turn-on signal, lets drain pump work x second again, then the Y second of circulating pump rerunning, if pressure switch still opens, then judges that the drainage is unusual, sends the warning.
The dishwasher can work the drainage pump for x seconds and the circulating pump for y seconds according to the actual requirement, and the judging steps (namely S302-S304) are repeated for n times to determine the accuracy of the opening signal of the pressure switch.
In the embodiment, after the abnormal drainage alarm, the drainage pump is closed, the circulating pump and the water inlet pump are closed, the machine and the overflow are prevented from being damaged, and meanwhile, the sound-light alarm prompts a user to maintain.
In the drainage fault detection method provided by the embodiment of the invention, the pressure switch is positioned on the circulation branch of the circulation pump, after the drainage stage, the opening or closing state of the pressure switch is detected by starting the circulation pump, and when the pressure switch is in the opening state, the drainage pump works for x seconds, and then the circulation pump works for y seconds, after the judgment step is repeated for n times, the opening or closing state of the pressure switch is detected again to judge whether drainage is abnormal.
The pressure switch of the embodiment of the invention is positioned on the drainage branch of the drainage pump, and the state of the pressure switch is detected in the drainage stage. Fig. 4 is a schematic flow chart of a drainage fault detection method provided by a fourth embodiment of the present invention, and as shown in fig. 4, the drainage fault detection method provided by the embodiment of the present invention may include:
s401: drainage is started.
S402: and controlling the drainage pump to work for x seconds.
S403: and controlling the drainage pump to work again.
In this embodiment, S403 is executed after S402 is executed.
In this embodiment, obtaining the state of the pressure switch in the draining stage of the dishwasher may include: after the first drainage stage of the drainage pump works for x seconds, acquiring the state of a pressure switch when the second drainage stage of the drainage pump works; wherein x is greater than 0, and x is the shortest time for the drainage pump to drain the water in the cavity.
Specifically, the pressure switch is connected to the drainage branch of the drainage pump, and the drainage process can be carried out in stages. The drainage pump works for x seconds in the first stage, so that the drainage can be completely performed under normal conditions (no water is accumulated in the cavity of the dish-washing machine); and the second stage drainage pump works again, the state of the pressure switch is checked in the second stage working process, and if the pressure switch is in an open state, the first stage drainage is not clean (accumulated water in the cavity of the dishwasher) and the drainage is abnormal.
S404: and judging whether the pressure switch is closed or not.
In this embodiment, the judging whether the drain of the dishwasher is abnormal according to the state of the pressure switch includes: when the pressure switch is not in the closed state, the abnormal drainage of the dishwasher is judged.
Specifically, in the drainage stage, when the drainage pump drains water in the second stage, the pressure switch is turned on, the MCU receives a pressure switch turn-on signal, judges that drainage is abnormal, and gives an alarm or gives an audible and visual prompt to a user for maintenance.
In the embodiment, after the alarm of abnormal drainage is judged, the drainage pump is closed, the circulating pump and the water inlet pump are closed, the machine is prevented from being damaged and overflowing is prevented, and meanwhile, the sound-light alarm prompts a user to maintain.
In the drainage fault detection method provided by the embodiment of the invention, the pressure switch is positioned on the drainage branch of the drainage pump, the drainage process can be performed in stages, and the opening or closing state of the pressure switch is detected in the second stage of drainage so as to judge whether drainage is abnormal.
Further, in the embodiment shown in fig. 4, before determining that the drain of the dishwasher is abnormal after the pressure switch is not in the closed state, the drain fault detection method provided by the embodiment of the present invention may further include: timing from the second drainage stage, and detecting the time length z of the pressure switch in the opening state; and judging that the water drainage of the dishwasher is abnormal when the time length z is greater than or equal to the preset time length a.
Specifically, fig. 5 is a schematic flow chart of a drainage fault detection method provided in the fifth embodiment of the present invention, and as shown in fig. 5, the drainage fault detection method provided in the fifth embodiment of the present invention may include:
s501: drainage is started.
S502: and controlling the drainage pump to work for x seconds.
S503: and controlling the drainage pump to work again.
S504: and judging whether the pressure switch is closed or not. If so, draining normally, and ending; if not, go to S505.
In this embodiment, the implementation methods of S501 to S304 are the same as those of S401 to S404 in the above embodiment, and the description of this embodiment is omitted here.
S505: and detecting whether the time length z of the pressure switch in the opening state is greater than or equal to the preset time length a. If yes, abnormal drainage is performed, and a user is warned or prompted by sound and light to maintain; if not, go to S502.
In this embodiment, after receiving the pressure switch on signal, the MCU detects a time z during which the pressure switch is in the on state, and if the time z during which the pressure switch is in the on state is greater than or equal to a preset time a, it determines that the drainage is abnormal and sends an alarm. Wherein z is less than x.
The embodiment determines the accuracy of the opening signal of the pressure switch by detecting the time length z of the opening state of the pressure switch.
In the embodiment, after the abnormal drainage alarm, the drainage pump is closed, the circulating pump and the water inlet pump are closed, the machine and the overflow are prevented from being damaged, and meanwhile, the sound-light alarm prompts a user to maintain.
In the drainage fault detection method provided by the embodiment of the invention, the pressure switch is positioned on the drainage branch of the drainage pump, the drainage process can be performed in stages, and whether the time length z of the pressure switch in the opening state is greater than or equal to the preset time length a or not is detected in the second drainage stage so as to judge whether drainage is abnormal or not. In this embodiment, the meaning of setting the duration z of the second drainage stage when the pressure switch is in the on state is to compensate the drainage time of the first drainage stage of the drainage pump, for example, when the pipeline is blocked, the power of the drainage pump is reduced, and the washing water in the cavity is not completely drained after the first drainage stage of the drainage pump operates for x seconds, the preset duration a set in the second drainage stage is used for compensation, and when the duration z is greater than or equal to the preset duration a, it is considered that the washing water in the cavity is not completely drained after the compensation time, and the abnormal drainage of the dishwasher is further determined. The embodiment sets the preset time length a in the second drainage stage, so that misjudgment of abnormal drainage of the dishwasher can be reduced, and the judgment accuracy of the dishwasher is improved.
The pressure switch of the embodiment of the invention is positioned on the drainage branch of the drainage pump, and the state of the pressure switch is detected in the drainage stage. Fig. 6 is a schematic flow chart of a drainage fault detection method provided by a sixth embodiment of the present invention, and as shown in fig. 6, the drainage fault detection method provided by the sixth embodiment of the present invention may include:
s601: drainage is started.
S602: and timing from the start of the operation of the drainage pump, and detecting the time length m of the on state of the pressure switch.
In this embodiment, obtaining the state of the pressure switch in the draining stage of the dishwasher may include: and timing from the start of the operation of the drainage pump, and detecting the time length m of the on state of the pressure switch.
Specifically, when the draining pump just starts draining, accumulated water in the cavity of the dish washing machine starts to drain, and at the moment, if the pressure switch is turned on, the draining is in a normal state.
S603: and judging whether m is greater than or equal to a preset time length b. If yes, abnormal drainage is performed, and a user is warned or prompted by sound and light to maintain; if not, the drainage is normal.
In this embodiment, in order to reduce the misjudgment, the preset time b is specially set, and whether the drainage of the dishwasher is abnormal is judged according to the state of the pressure switch, including: when the time length m is greater than or equal to the preset time length b, judging that the drainage of the dish washing machine is abnormal; when the drainage pump works for a preset time (x seconds in the embodiment), under the condition that accumulated water in the cavity of the dish washer can be drained under the normal condition, if the pressure switch is still opened at the moment, the water is not drained completely when the drainage pump works, and when the opening time m of the pressure switch is more than or equal to b, the drainage is judged to be abnormal; wherein b is more than or equal to x, and x is the shortest time for the drainage pump to drain the water in the cavity.
In this embodiment, after receiving the pressure switch on signal, the MCU detects a time duration m when the pressure switch is in the on state, and if the time duration m when the pressure switch is in the on state is greater than or equal to a preset time duration b, it determines that the drainage is abnormal, and sends an alarm.
In the embodiment, after the abnormal drainage alarm, the drainage pump is closed, the circulating pump and the water inlet pump are closed, the machine and the overflow are prevented from being damaged, and meanwhile, the sound-light alarm prompts a user to maintain.
In the drainage fault detection method provided by the embodiment of the invention, the pressure switch is positioned on the drainage branch of the drainage pump, and the time length m of the pressure switch in the open state is detected from the start of the work of the drainage pump so as to judge whether the drainage is abnormal.
An embodiment of the present invention further provides a dishwasher, including:
a cavity for receiving washing water;
the circulating branch is communicated with the cavity;
the drainage branch is communicated with the cavity;
the pressure switch is used for detecting the water pressure in the circulating branch and/or the drainage branch;
the acquisition module is used for acquiring the state of a pressure switch in the drainage stage of the dishwasher;
and the judging module is used for judging whether the drainage of the dishwasher is abnormal or not according to the state of the pressure switch.
Wherein, the obtaining module and the judging module can be arranged in the MCU of the dishwasher.
Further, in the above embodiment, the pressure switch is located in a circulation branch of the circulation pump, and after the water discharge stage is finished, the circulation pump is started to detect a state of the pressure switch.
Specifically, fig. 7 is a schematic structural diagram of a pressure switch provided in an embodiment of the present invention, where the pressure switch is located in a circulation branch of a circulation pump, and as shown in fig. 7, one end of the pressure switch is connected to a positive power supply terminal, and the other end is connected to ground. When the pressure switch is closed, the MCU IO port is at a low level; when the pressure switch is opened, the MCU IO port is at high level. According to the high and low levels of the pressure switch, the on-off of the water discharging stage of the circulating pump can be controlled. In fig. 7, L denotes live wire and N denotes neutral wire.
Further, in the above embodiment, the pressure switch is located in the drain branch of the drain pump, and the state of the pressure switch is detected during the drain phase.
In this embodiment, the schematic structure and the implementation principle of the pressure switch located on the drainage branch of the drainage pump are similar to those of the pressure switch located on the circulation branch of the circulation pump, and this embodiment is not described herein again.
Further, in the above embodiment, the dishwasher further includes:
the detection module is used for detecting the duration of the pressure switch in an open state;
the judging module is also used for judging that the drainage of the dishwasher is abnormal when the duration is greater than or equal to the preset duration.
Wherein, the detection module and the judgment module can also be arranged in the MCU of the dishwasher.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (10)
1. A method for detecting a drain malfunction of a dishwasher, comprising:
starting a draining stage of the dishwasher;
acquiring the state of a pressure switch in a drainage stage or after the drainage stage of the dish-washing machine;
judging whether the water drainage of the dishwasher is abnormal or not according to the state of the pressure switch;
the pressure switch is positioned on a circulation branch of the circulating pump, and after the drainage stage is finished, the circulating pump is started to detect the state of the pressure switch; or the pressure switch is positioned on a drainage branch of the drainage pump, and the state of the pressure switch is detected in the drainage stage;
the pressure switch is used for monitoring the water pressure generated by the circulating pump or the drainage pump so as to determine whether the drainage pump is in fault; and the water pressure generated by the circulating pump or the drainage pump is greater than or equal to A kpa so as to open the pressure switch, the drainage pump is judged to have a fault at the moment, and Akpa is the minimum water pressure for opening the pressure switch.
2. The method of claim 1, wherein said pressure switch is located in a circulation branch of a circulation pump, said obtaining a status of the pressure switch after a drain phase of the dishwasher comprising:
controlling the circulating pump to work for y seconds after the drainage pump works for x seconds, and acquiring the state of a pressure switch when the circulating pump works;
wherein x is greater than 0, y is greater than 0, x is the shortest time for the drainage pump to drain water in the cavity, and y is the shortest time for circulating water of the circulating pump to generate water pressure;
the judging whether the drainage of the dishwasher is abnormal according to the state of the pressure switch comprises:
and judging that the drainage of the dishwasher is abnormal when the pressure switch is not in a closed state.
3. The method of claim 2, wherein before the drain abnormality of the dishwasher is judged after the pressure switch is not in the closed state, the method further comprises:
controlling the drainage pump to work for x seconds and the circulating pump to work for y seconds, and obtaining the state of the pressure switch when the circulating pump works again after circulating for n times;
wherein n is an integer greater than 1; x > y.
4. The method of claim 1, wherein said pressure switch is located in a drain branch of a drain pump, and said obtaining the status of the pressure switch during a drain phase of the dishwasher comprises:
after the first drainage stage of the drainage pump works for x seconds, acquiring the state of a pressure switch when the second drainage stage of the drainage pump works;
wherein x is greater than 0, and x is the shortest time for the drainage pump to drain the water in the cavity;
the judging whether the drainage of the dishwasher is abnormal according to the state of the pressure switch comprises:
and judging that the drainage of the dishwasher is abnormal when the pressure switch is not in a closed state.
5. The method of claim 4, wherein before the drain abnormality of the dishwasher is judged after the pressure switch is not in the closed state, the method further comprises:
starting timing from the second drainage stage, and detecting the time length z of the pressure switch in an opening state;
and judging that the water drainage of the dishwasher is abnormal when the time length z is greater than or equal to a preset time length a.
6. The method of claim 1, wherein said pressure switch is located in a drain branch of a drain pump, and said obtaining the status of the pressure switch during a drain phase of the dishwasher comprises:
timing from the start of the operation of the drainage pump, and detecting the time length m of the pressure switch in an opening state;
the judging whether the drainage of the dishwasher is abnormal according to the state of the pressure switch comprises:
and judging that the drainage of the dishwasher is abnormal when the time m is greater than or equal to a preset time b.
7. A dishwasher, comprising:
a cavity for receiving washing water;
the circulating branch is communicated with the cavity;
the drainage branch is communicated with the cavity;
the pressure switch is used for detecting the water pressure in the circulating branch and/or the drainage branch;
the acquisition module is used for acquiring the state of a pressure switch in the drainage stage of the dishwasher;
the judging module is used for judging whether the drainage of the dishwasher is abnormal or not according to the state of the pressure switch;
the pressure switch is positioned on a circulation branch of the circulating pump, and after the drainage stage is finished, the circulating pump is started to detect the state of the pressure switch; or the pressure switch is positioned on a drainage branch of the drainage pump, and the state of the pressure switch is detected in the drainage stage;
the pressure switch is used for monitoring the water pressure generated by the circulating pump or the drainage pump so as to determine whether the drainage pump is in fault; and the water pressure generated by the circulating pump or the drainage pump is greater than or equal to A kpa so as to open the pressure switch, the drainage pump is judged to have a fault at the moment, and Akpa is the minimum water pressure for opening the pressure switch.
8. The dishwasher of claim 7, wherein the pressure switch is located in a circulation branch of the circulation pump, and after the drain phase is completed, the circulation pump is activated to detect the state of the pressure switch.
9. The dishwasher of claim 7, wherein the pressure switch is located on a drain branch of a drain pump, the state of the pressure switch being detected during a drain phase.
10. The dishwasher of any one of claims 7 to 9, further comprising:
the detection module is used for detecting the duration of the pressure switch in an open state;
the judging module is also used for judging that the drainage of the dishwasher is abnormal when the duration is greater than or equal to the preset duration.
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| CN112043218A (en) * | 2019-05-20 | 2020-12-08 | 青岛海尔股份有限公司 | Drainage control method of washing equipment and washing equipment |
| CN111870201A (en) * | 2020-08-04 | 2020-11-03 | 上海明略人工智能(集团)有限公司 | Method and device for determining faults of dish washing machine and storage medium |
| CN113180572A (en) * | 2021-03-16 | 2021-07-30 | 青岛海尔洗碗机有限公司 | Control method of dish-washing machine and dish-washing machine |
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