Turbidity detection system with calibration function, detection method and dish washing machine

A detection system and detection method technology, applied in the field of washing, can solve the problems of unclean washing, inaccurate judgment of the cleanliness of washing water by a dishwasher, inconvenience, etc., and achieve the effect of automatic calibration.

Inactive Publication Date: 2016-04-06
QINGDAO HAIER DISHWASHER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is no scale on the surface of the turbidity sensor, the voltage difference before and after washing is 4.7-3=1.7V. If there is scale on the surface of the turbidity sensor, the voltage difference before and after washing may become about 3-1.5=1.5V, so the same In the washing state, if there are two different differences, the main control board will adopt different washing procedures according to the different differences, which will cause the dishwasher to judge inaccurately the cleanliness of the washing water during the washing process, so there will be washing Unclean condition causing inconvenience to people

Method used

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  • Turbidity detection system with calibration function, detection method and dish washing machine
  • Turbidity detection system with calibration function, detection method and dish washing machine
  • Turbidity detection system with calibration function, detection method and dish washing machine

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Embodiment 1

[0046] This embodiment provides a turbidity detection system with calibration function, the structure of the turbidity detection system with calibration function is as follows figure 1 and figure 2 As shown, it includes a control unit 1 and a turbidity sensor 2 connected to the control unit 1 . like figure 2 As shown, the turbidity sensor 2 includes a light emitter 21 and a light absorber 22 , and the light emitter 21 and the light absorber 22 are respectively connected to the control unit 1 . When the surface of the turbidity sensor 2 has scale or viscous pollutants, the light emitted by the light emitter 21 is blocked or scattered at first, and then irradiates on the light absorber 22 through the scattering of the water body, so the light received by the light absorber 22 The strength of the turbidity signal will be weakened, and the turbidity signal fed back to the control unit 1 will also decrease, thus causing the turbidity signal detection deviation of the turbidity ...

Embodiment 2

[0053] This embodiment provides a detection method, using the turbidity detection system with calibration function described in Embodiment 1 to detect the turbidity of washing water. Take the application in the dishwasher as an example, such as image 3 As shown, the detection method includes the following steps:

[0054] S201: The control unit 1 presets the standard value V of the turbidity voltage signal of clear water 0 And calibration deviation range △V. For example, the standard value of the turbidity voltage signal of clear water V 0 =4.7, the calibration deviation value range ΔV is set to [1.4,2.5).

[0055] S202: The dishwasher enters clean water. When the water level is higher than the turbidity sensor 2, the dishwasher pauses for 35s, and the control unit 1 receives the turbidity sensor 2 to detect the detection value V of the turbidity voltage signal of the washing water every 5s. n .

[0056] S203: Control unit 1 judges △V n '=V n -V 0 Whether it is within ...

Embodiment 3

[0065] This embodiment provides another detection method. Similarly, the turbidity detection system with calibration function described in Embodiment 1 is used to detect the turbidity of the washing water. Take the application in the dishwasher as an example, such as Figure 4 As shown, the detection method includes the following steps:

[0066] S301: The control unit 1 presets the standard value V of the turbidity voltage signal of clear water 0 and calibration offset value range f. For example, the standard value of the turbidity voltage signal of clear water V 0 =4.7, f is the ratio of the turbidity voltage signal detection value of the wash water detected by the turbidity sensor 2 to the standard value of the turbidity voltage signal value of the clean water, which can be set as [0.5,0.7).

[0067] S302: The dishwasher enters clean water. When the water level is higher than the turbidity sensor 2, the dishwasher pauses for 35s, and the control unit 1 receives the turbid...

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Abstract

The invention discloses a turbidity detection system with the calibration function and belongs to the technical field of washing. The detection system is designed in order to solve the problem of turbidity signal detection deviation, caused by pollutants, of a turbidity sensor. The detection system comprises a control unit, the turbidity sensor and a calibration unit, wherein the turbidity sensor and the calibration unit are connected with the control unit. The control unit presets the turbidity voltage signal standard value and the calibration deviation value range of clear water, compares a received voltage signal detected value, detected by the turbidity sensor, of washing water with the turbidity voltage signal standard value, and controls the calibration unit to started or stopped according to whether the difference value or the specific value of the voltage signal detected value and the turbidity voltage signal standard value is within the calibration deviation range or not. The calibration unit is used for adjusting the voltage signal detected value to reach or be close to the turbidity voltage signal standard value. The invention further discloses a detection method to which the detection program is applied and a dish washing machine. The calibration unit can adjust the voltage signal detected value, detected by the turbidity sensor, of the washing water to reach or be close to the turbidity voltage signal standard value, and then automatic calibration of the turbidity sensor is achieved.

Description

technical field [0001] The invention belongs to the technical field of washing, and relates to a turbidity detection system with a calibration function, a detection method and a dishwasher applying the detection method. Background technique [0002] Since the turbidity sensor is in the middle and lower part of the sink, after washing the dishwasher for a period of time, if the water hardness is high, some scale will be generated on the surface of the turbidity sensor, and it may also be caused by some sticky substances blocking the surface of the turbidity sensor. Pollution, the signal transmitted by the surface polluted turbidity sensor to the main control board will deviate from the original set signal, so the washing program judged by the main control board will also deviate. [0003] Specifically, the voltage value fed back to the main control board by the turbidity sensor will be inaccurate. For example: under normal circumstances, the voltage preset value of clean wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47L15/42G01N21/31
Inventor 王大伟王华伟姜战存
Owner QINGDAO HAIER DISHWASHER
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