CN114098582B - System and method for detecting foam quantity in household appliance - Google Patents
System and method for detecting foam quantity in household appliance Download PDFInfo
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- CN114098582B CN114098582B CN202111369409.7A CN202111369409A CN114098582B CN 114098582 B CN114098582 B CN 114098582B CN 202111369409 A CN202111369409 A CN 202111369409A CN 114098582 B CN114098582 B CN 114098582B
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- foam
- household appliance
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- detecting
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- 239000006260 foam Substances 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 51
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 238000005406 washing Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 241000190070 Sarracenia purpurea Species 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 101150114468 TUB1 gene Proteins 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
Classifications
-
- 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
- A47L15/4297—Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
-
- 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
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0021—Regulation of operational steps within the washing processes, e.g. optimisation or improvement of operational steps depending from the detergent nature or from the condition of the crockery
-
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/22—Condition of the washing liquid, e.g. turbidity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Water Supply & Treatment (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Control Of Washing Machine And Dryer (AREA)
Abstract
A system and method for detecting an amount of foam within a household appliance, the detection system including a household appliance body, a control subsystem, and a foam sensor. The detection method comprises the following steps: step 1), intermittently transmitting detection signals through a foam sensor, wherein the duration of each transmission of the detection signals is S i, i=1, 2, … C, and C is more than or equal to 1; the interval time between every two sending detection signals is T j, j=1, 2, … C-1, C is more than or equal to 1; in the time S i, the secondary number of the transmitted detection signal is recorded as M i, i=1, 2, … C, and C is more than or equal to 1; in the time S i, the number of detected foam is counted as N i, i=1, 2, … C, and C is more than or equal to 1; and 2) calculating the foam quantity, wherein the foam quantity P= (N1+N2+ … +N i）/（M1+M2+…+Mi) is 100%.
Description
Technical Field
The invention belongs to the technical field of household appliances, and particularly relates to a system and a method for detecting foam quantity in a household appliance.
Background
Household appliances for washing, such as washing machines, dishwashers, generate foam during operation. In the working process, if the generated foam is excessive, the working process can be influenced, and the foam needs to be reduced by spraying and the like. It is also generally necessary to control the amount of foam within a set threshold value at the end of the work or after the work has been completed. The precondition for the treatment of the foam is that it is necessary to detect the amount of foam in the household appliance for a certain period of time.
The current common detection mode comprises the detection of whether foam exists or not by adopting a liquid level sensor, a photoelectric sensor and the like. Detecting foam by adopting a liquid level sensor, detecting liquid level change mainly through difference of internal and external air pressure, and comparing the liquid level change to judge whether foam exists or not; a disadvantage of this detection method is that false positives may occur if the detection or other problems during draining cause that the water is not drained. Detecting foam by adopting a photoelectric sensor, and judging whether the foam exists or not by detecting the difference of external media of the photoelectric sensor; when foam is attached to the surface of the photoelectric sensor, the detection result is disturbed, and erroneous judgment is caused. And the method can only detect whether foam exists, and cannot detect the foam amount.
For example, chinese patent publication No. CN108978113a describes a foam detection method for a washing machine. According to the foam detection method disclosed by the patent, whether excessive foam is generated in the washing machine is judged according to the numerical value of the liquid level sensor.
U.S. patent No. US9861248B2 discloses an optical sensor for water-air detection that is capable of detecting the presence of foam, but not the direct detection of the amount of foam. Other types of foam sensors exist in the art that are capable of detecting the presence of foam.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a system and a method for detecting the foam amount in a household appliance, which can accurately detect the foam amount in the household appliance and provide a basis for processing the foam.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A foam detection system for a household appliance includes a household appliance body, a control subsystem, and a foam sensor mounted within the household appliance body, the foam sensor connected to the control subsystem.
Further, the household appliance comprises a water cavity, and the foam sensor is installed in the water cavity; or an open container is arranged outside the water cavity, the container is communicated with the water cavity, and the foam sensor is arranged in the container.
In another improvement, the household appliance comprises a drain pipe, and the foam sensor is installed in the drain pipe.
Further, the household appliance is a drum washing machine, the drum washing machine comprises an inner drum and an outer drum, and the foam sensor is arranged between the inner drum and the outer drum.
Further, the household appliance is a dishwasher, the dishwasher comprises a water cup, and the foam sensor is installed in the water cup.
Further, the foam sensor mounting height is a default intake water level.
A method for detecting the amount of foam in a household appliance, comprising the steps of:
Step 1), intermittently transmitting detection signals through a foam sensor, wherein the duration of each transmission of the detection signals is S i, i=1, 2, … C, and C is more than or equal to 1; the interval time between every two sending detection signals is T j, j=1, 2, … C-1, C is more than or equal to 1; in the time S i, the secondary number of the transmitted detection signal is recorded as M i, i=1, 2, … C, and C is more than or equal to 1; in the time S i, the number of detected foam is counted as N i, i=1, 2, … C, and C is more than or equal to 1;
Step 2) the amount of foam, p= (n1+n2+ … +n i）/（M1+M2+…+Mi) 100%, was calculated.
Further, when C is not less than 2, S 1=S2=…= Si is described. The duration of each time of sending the detection signal is the same, the foam quantity detected once can be monitored in real time, the foam quantity difference of each time is compared, and particularly, the foam quantity difference of two adjacent times can judge whether the foam has the condition of accelerating the breaking or not and the effect of accelerating the breaking.
Further, when C is not less than 2, T 1=T2=…=Tj is set.
The invention discloses a system and a method for detecting the foam quantity in a household appliance, wherein the basic principle is as follows: the foam changes with time are reduced due to natural break-out, wind blow or spray break-out, etc. And the ratio of the times of detecting the foam is calculated through multiple times of detection within a certain time, so that the purpose of detecting the foam quantity is achieved. The detection system and the detection method have the advantages of very simple structure and method, high accuracy in detecting the foam quantity and the foam quantity change, and provides a basis for processing the foam in the household appliance. After the drainage is finished, the detection is carried out, and the effect is better. After foam collapse, if water continues to enter the water cavity, foam can be generated again, and the detection system and method provided by the invention can also be used for judging whether foam is generated again later.
Drawings
FIG. 1 is a schematic diagram of the time for transmitting detection signals according to the present invention;
FIG. 2 is a schematic diagram showing the relative positions of the foam sensor and the water level according to the present invention;
FIG. 3 is a schematic diagram showing a detecting system for a drum washing machine according to an embodiment of the present invention;
FIG. 4 is a timing diagram of sending a detection signal according to a first embodiment of the present invention;
FIG. 5 is a flow chart of a process foam according to an embodiment of the invention.
Detailed Description
A system and method for detecting the amount of foam in a home appliance according to the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "left", "right", "upper", "lower", "bottom", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and "first", "second", etc. do not represent the importance of the parts and thus are not to be construed as limiting the present invention. The specific dimensions and numerical values adopted in the embodiment are only for illustrating the technical scheme, and do not limit the protection scope of the invention. The following embodiments take the safety door lock of the present invention as an example for a dishwasher, but it should be noted that the safety door lock of the present invention is not limited to be applied to a dishwasher.
The invention discloses a foam detection system for a household appliance, which comprises a household appliance body, a control subsystem and a foam sensor, wherein the foam sensor is arranged in the household appliance body, and the foam sensor is connected to the control subsystem. The household appliance comprises a water cavity, and the foam sensor is arranged in the water cavity; or an open container is arranged outside the water cavity, the container is communicated with the water cavity, and the foam sensor is arranged in the container. The control subsystem can be arranged in the foam sensor, and the foam sensor only feeds back processed data to the main control system of the household appliance. The control subsystem can also be arranged in a main control system of the household appliance, the foam sensor feeds back original data to the main control system, and the main control system processes the data. The foam sensor may employ an existing foam sensor such as an optical foam sensor or the like.
Generally, a home appliance includes a drain pipe, and a foam sensor may be installed in the drain pipe.
Preferably, the household appliance is a dishwasher comprising a water cup in which the foam sensor is mounted.
In order to achieve a better effect, as shown in fig. 2, the foam sensor is installed at a default water inlet level.
A method for detecting the amount of foam in a household appliance, comprising the steps of:
Step 1) intermittently transmitting detection signals through a foam sensor, wherein the duration of each transmission of the detection signals is S i, i=1, 2, … C, and C is more than or equal to 1 as shown in fig. 1; the interval time between every two sending detection signals is T j, j=1, 2, … C-1, C is more than or equal to 1; in the time S i, the secondary number of the transmitted detection signal is recorded as M i, i=1, 2, … C, and C is more than or equal to 1; in the time S i, the number of detected foam is counted as N i, i=1, 2, … C, and C is more than or equal to 1;
Step 2) the foam amount p= (n1+n2+ … +n i）/（M1+M2+…+Mi) 100% was calculated.
Further, when C is not less than 2, S 1=S2=…= Si. The duration of each time of sending the detection signal is the same, the foam quantity detected once can be monitored in real time, the foam quantity difference of each time is compared, and particularly, the foam quantity difference of two adjacent times can judge whether the foam has the condition of accelerating the breaking or not and the effect of accelerating the breaking.
Further, when C is not less than 2, T 1=T2=…=Tj.
Example 1
The present embodiment illustrates the system and method for detecting the amount of foam in a home appliance according to the present invention by taking a drum washing machine as an example. Household appliances such as a dishwasher may also be implemented with reference to this embodiment.
As shown in fig. 3, a system for detecting a foam amount of a drum washing machine includes a drum washing machine inner tub 1, an outer tub 2, and a foam sensor 3. Preferably, the foam sensor 3 is mounted between the inner and outer drums 1,2, in particular at a level equal to the default water level. The foam sensor 3 is installed at this position, and the detection accuracy is high. If the installation position is lower, the sensitivity to foam detection is higher; if the installation position is higher, the device is mainly used for detecting the condition of excessive foam. Under the condition of more clothes, the height position of the clothes after water drainage is close to the default water inlet position, and the position is suitable for detecting foam, so that certain sensitivity is ensured, and the clothes are not saturated too early.
The following illustrates the detection method and the process of treating the foam:
As shown in fig. 4, after the drainage or dehydration is completed, foam information is collected. The acquisition process is as follows: the detection signal was sent intermittently by the foam sensor, each time with a duration of 2 seconds, using an alternating current frequency of 50Hz, and 100 times during each detection period (2 seconds). The interval between every two transmissions of the detection signal (i.e., every two detection periods) is 8 seconds. The total transmitted signal is up to 5 cycles. In the detection process, the detected foam quantity Pi=N j/100 x 100% in each period is recorded in real time, and i=1, 2,3,4 and 5. After completion of5 cycles, the total foam amount p= (P 1+P2+P3+P4+P5)/5.
As shown in fig. 5, when the washing/rinsing is completed and the water discharge is completed, the detection is started and the dehydration is started after the detection is completed. The method can also be used for detecting the condition of excessive foam at the end of each dehydration, and the method mainly detects the condition of excessive foam, has fewer foam after the dehydration is finished, and can have the problem of insensitive detection. Judging the foam amount and performing corresponding treatment: before the last rinsing, detecting the foam quantity P, if P is larger than a first threshold L 1, starting a foam removing function, such as spraying, blowing, increasing water inflow and the like. At the last rinse, the suds level P is detected, and if P > L 2, the suds removal function is turned on, such as increasing 1 rinse or increasing the water intake.
In this embodiment, the foam sensor 3 may also be mounted in other locations, such as into the drain pipe 4. When the foam detecting device is installed in the drain pipe 4, the sensitivity of detecting the foam is high because the position of the drain pipe 4 is relatively low, and the foam can be detected when the foam amount is small. If there is more foam, the detection is easily saturated.
The water storage position in the drum washing machine can be called as a water cavity 5, a container 6 can be additionally arranged, the upper part of the container 6 is opened, and the container is connected with the water cavity 5 through a connecting pipe. The foam sensor 3 may also be mounted within the container. Based on the principle of communicating vessels, the water level in the container 6 is equal to the water level in the water cavity 5. The water flow in the container 6 is relatively stationary and is affected by the connection pipe and is not the most suitable installation location. But this location is advantageous for integrating other sensors such as turbidity sensors, hardness sensors, conductivity sensors, etc.
Based on the description of the preferred embodiments of the present invention, it should be clear that the invention defined by the appended claims is not limited to the specific details set forth in the above description, but that many apparent variations of the invention are possible without departing from the spirit or scope thereof.
Claims (3)
1. A method for detecting the amount of foam in a household appliance, comprising the steps of:
step 1), intermittently transmitting detection signals through a foam sensor, wherein the duration of each transmission of the detection signals is S i, i=1, 2, … C, and C is more than or equal to 1; the interval time between every two sending detection signals is T j, j=1, 2, … C-1, C is more than or equal to 1; in the time S i, the secondary number of the transmitted detection signal is recorded as M i, i=1, 2, … C, and C is more than or equal to 1; in the time S i, the number of detected foam is counted as N i, i=1, 2, … C, and C is more than or equal to 1;
Step 2) the amount of foam, p= (n1+n2+ … +n i)/(M1+M2+…+Mi) 100%, was calculated.
2. The method for detecting the amount of foam in a household appliance according to claim 1, wherein when C is equal to or greater than 2, S 1＝S2＝…＝Si; the duration time of each time of sending the detection signal is the same, the foam quantity detected once is monitored in real time, and the foam quantity difference of each time is compared to judge whether the foam is in the condition of accelerating the breaking or not and the effect of accelerating the breaking.
3. The method for detecting the amount of foam in a household appliance according to claim 1, wherein T 1＝T2＝…＝Tj is set when C is equal to or greater than 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111369409.7A CN114098582B (en) | 2021-11-18 | 2021-11-18 | System and method for detecting foam quantity in household appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111369409.7A CN114098582B (en) | 2021-11-18 | 2021-11-18 | System and method for detecting foam quantity in household appliance |
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| CN114098582A CN114098582A (en) | 2022-03-01 |
| CN114098582B true CN114098582B (en) | 2024-06-18 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109355864A (en) * | 2018-11-19 | 2019-02-19 | 青岛海尔滚筒洗衣机有限公司 | A kind of roller washing machine and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3689001B2 (en) * | 2001-01-12 | 2005-08-31 | 株式会社東芝 | Drum type washer / dryer |
| KR20090061463A (en) * | 2007-12-11 | 2009-06-16 | 엘지전자 주식회사 | Method for detecting bubble of washing machine |
| DE102008028030A1 (en) * | 2008-06-12 | 2009-12-24 | BSH Bosch und Siemens Hausgeräte GmbH | Method and device for determining foam in a washing machine |
| JP6049372B2 (en) * | 2012-09-19 | 2016-12-21 | 東芝ライフスタイル株式会社 | Washing and drying machine |
| CN105078199B (en) * | 2014-05-12 | 2018-02-06 | 佛山市顺德区美的电热电器制造有限公司 | The control method of electric cooker and electric cooker |
| EP3318670A1 (en) * | 2016-11-08 | 2018-05-09 | BSH Hausgeräte GmbH | Process for the operation of a washing machine with foam detection and washing machine suitable for this process |
| CN108309045B (en) * | 2017-01-18 | 2020-04-03 | 佛山市顺德区美的电热电器制造有限公司 | Electric cooker, anti-overflow detection system thereof and time calculation method of steam foam |
| EP3382083A1 (en) * | 2017-03-27 | 2018-10-03 | Vestel Elektronik Sanayi ve Ticaret A.S. | Method for determining foam in a washing machine |
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| CN110670296A (en) * | 2019-10-08 | 2020-01-10 | 重庆特斯联智慧科技股份有限公司 | Intelligent control method for smart home |
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- 2021-11-18 CN CN202111369409.7A patent/CN114098582B/en active Active
Patent Citations (1)
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| CN109355864A (en) * | 2018-11-19 | 2019-02-19 | 青岛海尔滚筒洗衣机有限公司 | A kind of roller washing machine and control method |
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