Turbidity sensor and electric home appliance having the same

A technology of turbidity sensor and household appliances, which is applied in household cleaning devices, tableware washing machines/rinsing machines, automatic detection under the control of tableware washing machines/rinsing machines, etc., and can solve problems such as measurement errors

Inactive Publication Date: 2009-09-16
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, when the above-mentioned conventional turbidity sensor 3 is used in the container 1 containing water for a long time, the surface of the turbidity sensor 3 is covered with impurities (for example, scale)
As a result, the change in the amount of light received by the light receiving portion 3b has nothing to do with the turbidity of the water, so that the turbidity sensor 3 will make an error in the measurement of the turbidity of the water

Method used

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  • Turbidity sensor and electric home appliance having the same
  • Turbidity sensor and electric home appliance having the same
  • Turbidity sensor and electric home appliance having the same

Examples

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Embodiment Construction

[0045] Embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0046] image 3 is a view showing the structure of the turbidity sensor according to the first embodiment.

[0047] exist image 3 Among them, the turbidity sensor 40 includes: a light emitting part 41 mounted on a base 44 and emitting light; a first light receiving part 42 and a second light receiving part 43 respectively receiving the light emitted from the light emitting part 41 . Usually, for example, a light emitting element such as an LED is used as the light emitting section 41 , and a light receiving element such as a phototransistor or a photodiode is used as the first light receiving section 42 and the second light receiving section 43 , for example.

[0048] The light emitting...

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Abstract

Disclosed are a turbidity sensor, which correctly senses a turbidity of water although the surface of the turbidity sensor is covered with foreign substances, such as scale, and an electric home appliance having the turbidity sensor. The turbidity sensor includes a light emitting part emitting light, a first light receiving part receiving light emitted from the light emitting part and travelling straight, a second light receiving part receiving light emitted from the light emitting part and scattered, and a control unit determining a turbidity of water according to a ratio of the amounts of the light received by the plurality of light receiving parts. The first light receiving part is installed in a direction of directly receiving the light emitted from the light emitting part, and the second light receiving part is installed in another direction of not directly receiving the light emitted from the light emitting part.

Description

technical field [0001] The present invention relates to a turbidity sensor and a household appliance with the turbidity sensor, more specifically, to such a turbidity sensor and a household appliance with the turbidity sensor, although the surface of the turbidity sensor is covered with impurities ( For example, scale) coverage, but the turbidity sensor still accurately senses the turbidity of the water. Background technique [0002] Some products in home appliances that use water (eg, washing machines, dishwashers, etc.) have turbidity sensors installed therein to measure turbidity (ie, the degree of contamination of water), and based on the sensed turbidity to change the washing operation. These home appliances change washing frequency according to the turbidity sensed by the turbidity sensor, thereby reducing water waste and performing an optimum washing operation. [0003] Such as Figure 1A and Figure 1B As shown, a conventional turbidity sensor 3 for a container 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
CPCD06F39/004A47L15/4297A47L15/0018A47L2401/10G01N21/532D06F34/22D06F2103/20D06F2105/52D06F2105/62
Inventor 韩政秀表尚渊崔铉永金成勋韩成柱曹收镐李尚埈柳苏庭柳梧道
Owner SAMSUNG ELECTRONICS CO LTD
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