1. A method of preventing fouling of a wash tub sandwich, characterized by: and spraying tap water for 0.5-2 minutes before the lowest rotating speed which is insufficient for wetting clothes is immediately thrown out when the rotating speed of the inner barrel is reduced to the rotating speed of the inner barrel after 1 minute from the beginning of the last dewatering process of the washing machine until the water sprayed through the dewatering holes is sprayed out.

2. A method of preventing fouling of a wash tub sandwich as claimed in claim 1, the method comprising the steps of: and the water spray opening starts to spray water after the last dewatering program of the washing machine starts to run for 1 minute, and the water spray opening stops when the dewatering motor is powered off.

3. A method of preventing fouling of a wash tub sandwich as claimed in claim 1, the method comprising the steps of: and the water spray opening starts spraying water after the last dewatering program of the washing machine starts running for 1 minute, and the water spray is stopped after 0.5-2 minutes of delay.

4. A method of preventing fouling of a wash tub sandwich as claimed in claim 1, the method comprising the steps of: and the water spray opening starts to spray water when the last dewatering program of the washing machine runs 0.5-2 minutes before the dewatering motor is powered off, and stops spraying water when the dewatering motor is powered off.

5. A method of preventing fouling of a wash tub sandwich as claimed in claim 1, the method comprising the steps of: and the water spray opening starts to spray water when the last dehydration program of the washing machine runs until the dehydration amount of the clothes exceeds 90%, and stops spraying water when the dehydration motor is powered off.

6. A method of preventing fouling of a wash tub sandwich as claimed in claim 1, the method comprising the steps of: and the water spray opening starts to spray water when the last dehydration program of the washing machine is operated until the dehydration amount of the clothes exceeds 90%, and the water spray is stopped after 0.5-2 minutes.

7. A method of preventing fouling of a wash tub sandwich, comprising: the water spray opening is arranged on the outer barrel wall and/or the outer barrel bottom of the washing machine;

self-cleaning program which performs the method of any one of claims 1 to 6.

Background

Washing machines have entered thousands of households, but full-automatic washing machines have the common problem of scale deposition in the interlayer of the washing barrel. As the use time increases, a lot of dirt is formed on a hidden portion between the inner and outer tubs of the washing machine. The dirt is formed by that low-concentration rinsing water (still containing a small amount of detergent and dirt) is attached to each part in the washing tub after the washing is finished, and dissolved substances in the water are separated out and attached to the surface of each washing part to form an extremely thin dirt layer after the water is naturally evaporated. The layers of dirt accumulate together with the increase of the number of washing times, and become invisible from thin to thick, and finally become the 'layer of dirt' seen by us. They are not only easy to breed bacteria, but also can be partially peeled off in the washing process to influence the washing effect.

Disclosure of Invention

The present invention is directed to provide a washing machine capable of blocking the formation of dirt and continuously maintaining the cleanness of each space inside a washing tub, in view of the above-mentioned disadvantages of the prior art.

The technical scheme adopted by the invention is as follows: a washing machine with an anti-scaling device between an inner barrel and an outer barrel comprises a shell, the outer barrel arranged in the shell, the inner barrel arranged in the outer barrel and a wave wheel, and is characterized by also comprising the anti-scaling device, wherein the anti-scaling device comprises an electromagnetic water valve, a water jet and a control circuit; the electromagnetic water valve is arranged in the shell of the washing machine, and the water inlet of the electromagnetic water valve is connected with the water inlet of the washing machine through a pipeline, or the water inlet of the electromagnetic water valve is connected with the pipeline between the water inlet of the washing machine and the water inlet valve of the washing machine through a pipeline; the water spraying ports are arranged on the outer barrels, the water spraying direction of the water spraying ports faces to the interlayer between the inner and outer barrels, and the water spraying ports are converged by a pipeline and connected with the water outlet of the electromagnetic water valve; the electromagnetic water valve is connected with the control circuit, the control circuit can control the opening and closing of the electromagnetic water valve, the water spraying port sprays water when the electromagnetic water valve is opened, and the water spraying port stops spraying water when the electromagnetic water valve is closed.

Furthermore, the water spraying port sprays water in the last dewatering stage of the washing machine, and the starting time and the stopping time of the water spraying are adjustable.

Furthermore, the plurality of water spray ports are arranged on the side surface and the bottom surface of the outer barrel.

Furthermore, the electromagnetic water valve can be installed at any position in the washing machine and is connected with the control circuit.

During the period from the last dewatering program starting for 1 minute to the rotation speed of the inner tub decreasing to a specific value, the control circuit controls the electromagnetic water valve to open for 0.5-2 minutes, and the water spraying port sprays tap water into the interlayer between the inner tub and the outer tub of the washing machine. The sprayed tap water is sprayed to the corners of the interlayer between the inner barrel and the outer barrel by utilizing the high-speed rotation of the inner barrel during dehydration, so that the aim of washing the interlayer and the drain pipe is fulfilled, and the retention and evaporation of rinsing water in the machine are avoided, thereby fundamentally preventing the generation of dirt.

The specific value varies with the diameter of the inner barrel, and can be known from the centrifugal drying principle: the dehydration rate has a functional relation with the rotating speed and the diameter of the inner barrel, when the rotating speed of the inner barrel is higher than the value of a balance point, water sprayed through the dehydration holes can be thrown out immediately, and the water cannot enter the inner barrel to soak clothes to influence the dehydration effect.

The invention has the technical effects that: the invention sprays water to the interlayer between the inner barrel and the outer barrel of the washing machine at a specific time to wash rinse water attached in the interlayer so as to prevent dirt, solves the problem of scale accumulation of the full-automatic washing machine, does not increase the working time of the washing machine, does not change the original structure of the washing machine, and has less water consumption for washing.