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System and method for detecting amount of foam in household appliance

A household appliance and detection system technology, which is applied in the system field of foam volume, can solve problems such as the inability to directly detect foam, and achieve the effect of simple structure and method, better effect and high accuracy

Pending Publication Date: 2022-03-01
瀚乐电子机械(南京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] US Patent No. US9861248B2 discloses an optical sensor for water-air detection, which can detect the presence of foam, but cannot directly detect the amount of foam

Method used

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  • System and method for detecting amount of foam in household appliance
  • System and method for detecting amount of foam in household appliance
  • System and method for detecting amount of foam in household appliance

Examples

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Embodiment 1

[0036] This embodiment takes a drum washing machine as an example to illustrate the system and method for detecting the amount of foam in a household appliance according to the present invention. Household appliances such as dishwashers can also be implemented with reference to this embodiment.

[0037] Such as image 3 As shown, a system for detecting the amount of foam in a drum washing machine includes an inner tub 1 , an outer tub 2 , and a foam sensor 3 . Preferably, the foam sensor 3 is installed between the inner cylinder 1 and the outer cylinder 2, especially at a position equal to the default water level. Foam sensor 3 is installed in this position, and detection precision is high. If the installation position is lower, the sensitivity to foam detection is higher; if the installation position is higher, it is mainly used to detect excessive foam. In most cases, the height of the clothes after drainage is close to the default water inlet position. This position is s...

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Abstract

The invention discloses a system and method for detecting the amount of foam in a household appliance. The detection system comprises a household appliance body, a control subsystem and a foam sensor. The detection method comprises the following steps: 1) discontinuously sending detection signals through the foam sensor, wherein the duration of sending the detection signals each time is Si, i = 1, 2,... C, and C is greater than or equal to 1; the interval time between every two times of sending of the detection signals is Tj, j = 1, 2, 2... C-1, and C is greater than or equal to 1; in the Si time, the number of times of sending the detection signals is recorded as Mi, i = 1, 2,... C, and C is greater than or equal to 1; in the Si time, recording the number of times of foam detection as Ni, i = 1, 2,... C, and C > = 1; the foam amount P is equal to (N1 + N2 +... + Ni) / (M1 + M2 +... + Mi) * 100%. According to the detection system and method, the structure and the method are very simple, the foam amount detection accuracy and the foam amount change accuracy are high, and a basis is provided for treating foam in household appliances.

Description

technical field [0001] The invention belongs to the technical field of household appliances, in particular to a system and method for detecting the amount of foam in the household appliances. Background technique [0002] Household appliances used for washing, such as washing machines and dishwashers, generate foam during operation. During the working process, if too much foam is generated, it will affect the work process, and it is necessary to reduce the foam by spraying and other methods. Generally, in the final stage of the work or after the work is over, it is also necessary to control the amount of foam within the set threshold. The premise of processing the foam is that the amount of foam in the household appliance needs to be detected for a certain period of time. [0003] The current common detection methods include using liquid level sensors, photoelectric sensors, etc. to detect whether there is foam. The liquid level sensor is used to detect foam, mainly throu...

Claims

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Application Information

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IPC IPC(8): A47L15/42A47L15/00D06F34/22D06F33/30G01F23/00G01F23/80
CPCA47L15/4297A47L15/4223A47L15/0021D06F34/22D06F33/30G01F23/00
Inventor 任少江
Owner 瀚乐电子机械(南京)有限公司
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