Scale detection method, water tank applicable to the scale detection method, and equipment including the water tank

Abstract

The invention relates to a scale detection method, a water tank suitable for the scale detection method and equipment including the water tank. The method judges the water flow rate change in the water outlet pipeline of the water tank by detecting the water flow rate change per unit time after the water outlet pipeline of the water tank is used for a period of time. Fouling situation, and then to judge the fouling situation inside the water tank, the method is simple and easy, which significantly improves the fault diagnosis ability, can automatically judge the fault of the water level switch in the water tank, has good scalability, and is applicable to a wide range of scenarios.

Description

technical field [0001] The invention relates to scale detection technology, in particular to a scale detection method, a water tank suitable for the scale detection method and equipment including the water tank. Background technique [0002] The water used in daily life and industrial production is usually tap water. Tap water contains minerals. During the long-term operation of the equipment, it is easy to form scale on the surface of the equipment or pipes. If the scale accumulates to a certain extent, it will cause failure, such as the heating pipe burns out. , The heating efficiency drops, the water level switch is stuck, the pipeline is blocked, etc., which affect the normal operation of the equipment. How to accurately detect the amount of scale and eliminate the potential safety hazards caused by scale is a difficult problem that this field has been eager to solve. [0003] A variety of technical solutions for scale detection have been proposed in practice. For examp...

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Problems solved by technology

[0003] A variety of technical solutions for scale detection have been proposed in practice. For example, CN2017104855958, CN2020103131611, CN2019114079045, CN2014103458295, CN2018110030586, etc. have proposed a method for judging the amount of scale based on factors such as the temperature of the heating body, the heated cavity, and the change in energy consumption during the heating stage. This method is widely used in practice, but in some special places, the amount of scale accumulation will cause the volume of the water tank to change, and because the heating efficiency is affected by many factors, this method cannot accurately measure the amount of scale;

[0004] CN2019107458422 proposes a method for judging the amount of scale based on the relationship between water volume, temperature change, heating time, etc. Compared with the previous scheme, this method increases the water volume detection, but the application scene is greatly limited, and it is only suitable for pre-empty water tanks. situation, it cannot be measured in real time under working conditions;

[0005] CN2017114795192 proposes a method of judging scale growth by measuring water hardness, but in practical applications, there are many factors that affect scaling, and hardness is only one factor that affects scaling. For example, the frequency of use of dishwashers is diverse, which affects scaling The most important factor is not just the hardness of water, so only considering the hardness of water cannot accurately determine the actual situation of scale;

[0006] CN2018111446921, CN2014200205473, CN2018103822025, etc. proposed a method for detecting scale amount based on optical and infrared methods. This method puts forward special requirements for the structural design of the equipment. The equipment has a complex structure and high cost, and is only applicable to some special scenarios;

[0007] CN201720082610X proposes a method for detecting the amount of scale based on physical deposition. This method is only applicable to the situation where a large amount of scale is accumulated at the bottom of the container, which is beyond the normal working range of common equipment such as dishwashers, and has poor practicability.

[0008] In summary, although a variety of scale detection methods have been proposed in practice, generally speaking, there are generally technical problems such as poor measurement accuracy, single application scenarios, complex equipment structure, poor practicability and adaptability, and scale detection technology still exists. a lot of room for improvement

Taking dishwashers as an example, since the rinsing water tank is closed, there is no mature scale detection method, and it is impossible to accurately measure the scale accumulation. Even with monthly periodic manual inspection and descaling, it still cannot solve the frequent occurrence of some equipment with heavy scale. failure problem

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