CN103938416B - Washing machine and its control method with automatically cleaning thread bits filtering device - Google Patents

Abstract

The invention discloses a washing machine with a self-cleaning lint filtering device and a control method thereof. A branch pipeline is led out between a drain port and a drain valve of the washing machine, and the branch pipeline is connected to a circulating pump and a lint filtering device in sequence. , after passing through the lint filtering device, it is divided into two branches, the first branch is connected to the washing bucket of the washing machine, and the second branch is connected to the water inlet pipe through the recoil water inlet valve. The washing machine uses a circulation pump to introduce the washing water from the bottom drain into the lint filter device for forced filtration, and then returns to the inside of the washing machine to form a repeated cycle, which has the effect of thorough lint filtration and is not affected by the washing water level; through corresponding control The method is to introduce tap water to backflush the lint filter during the washing and/or drainage stage, so that the lint is discharged from the drain along with the bottom drainage, and has an automatic cleaning function.

Description

Washing machine with self-cleaning lint filter device and control method thereof

technical field

The invention relates to a washing machine, in particular to a washing machine with a self-cleaning lint filtering device and a control method thereof.

Background technique

Along with the raising of people's living standard, washing machine has gradually become one of necessary household appliances in people's family, and most people regard washing machine as the main tool of washing clothes. The pulsator-type fully automatic washing machine has short washing time and clean washing, and is favored by many consumers. However, the pulsator-type fully automatic washing machine produces a lot of lint, especially some fluff lint, which sticks to the clothes and is difficult to clean due to the high friction to the clothes while washing the clothes quickly, which makes users feel headaches. .

As shown in Figure 1, it is a backwater filter device disclosed in the prior art for a full-automatic pulsator washing machine, including a backwater cover plate, a filter screen cover and a filter screen; the filter screen is formed by welding a filter screen bag and a filter screen frame There is an annular positioning frame at the upper end; the top of the filter screen cover is provided with an elastic U-shaped tab, and the lower end has claws. The filter screen frame is inserted into the positioning rib on the filter screen cover through the annular positioning frame at the upper end, and the lower end is positioned by the hook claw. The filter screen cover is connected; there is a groove on the return water cover plate, and a return water outlet is opened on the upper part corresponding to the position of the filter screen frame. The edge is embedded in the groove, the claw at the lower end is inserted into the groove of the claw, and the elastic U-shaped tab at the upper end is inserted into the mouth of the tab. The filtering device is installed on the inner wall of the inner tub of the washing machine for filtering lint. However, the filtering effect is greatly affected by the washing water level. Not only is the filtration incomplete, but also the user needs to take out the lint filter for manual cleaning after washing. If the user forgets to clean it, it will be difficult to continue collecting lint when the lint filter is full. .

Contents of the invention

The object of the present invention is to provide a washing machine with a self-cleaning lint filter device, which can solve the problem that the lint filter of the existing washing machine is not completely filtered and needs to be cleaned manually.

For reaching this purpose, the present invention adopts following technical scheme:

A washing machine with a self-cleaning lint filter device, a branch pipeline is drawn between the drain port and the drain valve of the washing machine, and the branch pipeline is connected to a circulation pump and a lint filter device in sequence, and passes through the lint filter device After that, it is divided into two branches, the first branch is connected to the washing bucket of the washing machine, and the second branch is connected to the water inlet pipe through the recoil water inlet valve.

Further, the lint filtering device is a tee with a filter net in the middle.

Further, the backflush water inlet valve and the water inlet valve of the washing machine are both connected to a common water inlet pipe.

Further, the lumen of the branch pipe connecting the tee with the circulation pump is in the shape of an inverted cone with a large upper part and a smaller lower part below the filter screen.

Further, the tee is composed of detachable upper and lower parts, and the filter is installed between the two parts.

Further, the upper and lower parts are screwed together.

At the same time, a control method for the above-mentioned washing machine is provided, which is characterized by comprising the following steps:

(1) In the washing or rinsing stage, the recoil water inlet valve and drain valve are in the closed state, and the circulation pump is started to force the washing water in the washing machine to circulate through the circulation pump and the first branch of the lint filter device in sequence, so that the circulation The lint in the water is filtered and collected at the lint filtering device;

(2) In the drainage stage, the recoil inlet valve and drain valve are opened, and the tap water in the water inlet pipe is sprayed into the lint filter device through the second branch water inlet pipe, and the filter screen is reversely flushed, and the backflush with lint The flushing water flows through the pipeline to the circulating pump and the drain valve in turn to be discharged out of the washing machine.

Preferably, the circulation pump is activated during the last 3-5 minutes of the washing or rinsing phase.

Preferably, the recoil water inlet valve is opened for 10-20 seconds each time.

Preferably, when the water level in the washing machine is discharged below the pulsator of the washing machine, the recoil water inlet valve is opened.

The washing machine of the present invention uses a circulation pump to introduce the washing water from the bottom drain into the lint filtering device for forced filtration, and then returns to the inside of the washing machine to form a repeated cycle, which has the effect of thorough lint filtering and is not affected by the washing water level ;Through corresponding control, tap water is introduced during the washing and/or draining stage to backflush the lint filter, so that the lint is discharged from the drain along with the bottom drainage, and has the function of automatic cleaning.

Description of drawings

Fig. 1 is a kind of return water filtering device of fully automatic pulsator washing machine disclosed in the prior art;

Fig. 2 is a schematic structural view of a washing machine with a self-cleaning lint filtering device according to the embodiment;

Fig. 3 is a schematic structural view of the lint filtering device described in the embodiment;

Fig. 4 is a control flow chart of the washing machine with the self-cleaning lint filtering device according to the embodiment.

In the picture:

1. Outlet; 2. Drain valve; 3. Circulating pump; 4. Wave wheel; 5. Lint filtering device; 6. Filter; 7. First branch; 8. Second branch; 9. Recoil Water inlet valve; 10, water inlet valve; 11, water inlet pipe.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

As shown in Figures 2 to 3, a specific embodiment of the washing machine with a self-cleaning lint filter device according to the present invention is provided. As shown in Figure 2, between the drain port 1 and the drain valve 2 of the existing washing machine The branch pipeline is drawn out, and the branch pipeline is connected to the circulation pump 3 and the lint filtering device 5 in turn, and is divided into two branches after passing through the lint filtering device 5, the first branch 7 is connected to the washing bucket of the washing machine, and the second The branch 8 is connected to the water inlet pipe 11 through the recoil water inlet valve 9 , and in this embodiment, the recoil water inlet valve 9 and the water inlet valve 10 of the washing machine are both connected to a common water inlet pipe 11 .

As shown in Figure 3, a specific structural diagram of the lint filtering device 5 is provided, which is a three-way with a filter screen 6 arranged in the middle; at the same time, in order to facilitate the backwash of the lint, the three-way is connected to the circulation pump 3 The inner cavity of the branch pipe is in the shape of an inverted cone with a large upper part and a smaller lower part below the filter screen 6.

For the convenience of installation, replacement and maintenance of the filter screen 6, the tee is composed of detachable upper and lower parts, and the filter screen 6 is installed in the middle of the two parts; the upper and lower parts can be screwed together.

Correspondingly, the above-mentioned control method of the washing machine with the self-cleaning lint filtering device includes the following steps:

(1) In the washing or rinsing stage, the recoil water inlet valve and drain valve are in the closed state, and the circulation pump is started to force the washing water in the washing machine to circulate through the circulation pump and the first branch of the lint filter device in sequence, so that the circulation The lint in the water is filtered and collected at the lint filtering device;

(2) In the drainage stage, the recoil inlet valve and drain valve are opened, and the tap water in the water inlet pipe is sprayed into the lint filter device through the second branch water inlet pipe, and the filter screen is reversely flushed, and the backflush with lint The flushing water flows through the pipeline to the circulating pump and the drain valve in turn to be discharged out of the washing machine.

The specific process is shown in Figure 4, as follows:

When washing clothes, after the user starts the program S1, the washing machine enters the tap water from the water inlet pipe 11 through the water inlet valve 10, enters the washing or rinsing stage S2 under the action of the control system, and performs the normal washing or rinsing S3 process.

In the S4 stage, when the washing machine enters the last t1 time of washing or rinsing, step S5 is executed to start the circulation pump; the washing water with lint passes through the circulation pump 3, the lint filtering device 5, the first Return to the inside of the washing machine after road 7, and repeat the cycle; preferably, t1 is the last 3-5 minutes of washing or rinsing, so as to collect lint and reduce energy consumption.

Go to step S6, after washing or rinsing, stop the circulating pump 3, and the washing machine enters the drainage stage S7, and when it is judged that the water level has dropped to the set water level at S8, go to step S9, and open the backflush water inlet valve 9 to perform backwashing of the filter screen 6. Flushing in the opposite direction; the high-pressure tap water from the water inlet pipe 11 is sprayed onto the filter screen 6 through the second branch 8, and the filter screen 6 is washed, and the recoil water flow with lint debris passes through the circulation pump 3 and the drain valve 2 together with the drainage. into the sewer.

In step S10, when the set time t2 is up, close the recoil water inlet valve 9 and enter the dehydration stage S11; when the dehydration is completed, if the set number of rinsing times has not been reached, the program automatically returns to execute a new rinsing process S2, Otherwise, enter the end procedure S13. During this process: the preferred set water level is the water level when the water level drops below the wave wheel 4; in the final stage of each washing and rinsing drainage, this process is performed to prevent the lint from collecting too much and blocking the filter screen 6; preferably Yes, the backflush water inlet valve 9 is opened every time t2 is 10-20S, automatically removes lint, and saves water at the same time.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A washing machine with a self-cleaning lint filtering device, characterized in that: a branch pipeline is drawn between the drain port and the drain valve of the washing machine, and the branch pipeline is connected to a circulating pump and a lint filtering device in sequence, and passes through The lint filtering device is divided into two branches, the first branch is connected to the washing bucket of the washing machine, and the second branch is connected to the water inlet pipe through the recoil water inlet valve, and the recoil water inlet valve is connected to the water inlet of the washing machine. The valves are all connected to a common water inlet pipe; the lint filtering device is a tee with a filter net in the middle. 2. The washing machine with a self-cleaning lint filter device according to claim 1, characterized in that: the inner cavity of the branch pipe connecting the tee with the circulating pump is in the shape of an inverted cone with a large upper part and a smaller lower part below the filter screen . 3. The washing machine with a self-cleaning lint filter device according to claim 1, characterized in that: the tee is composed of detachable upper and lower parts, and the filter is installed between the two parts. 4. The washing machine with a self-cleaning lint filtering device according to claim 3, wherein the upper and lower parts are connected together by threads. 5. A control method for a washing machine with a self-cleaning lint filtering device according to any one of claims 1 to 4, characterized in that it comprises the following steps: (1) In the washing or rinsing stage, the recoil water inlet valve and the drain valve are in the closed state, and the circulation pump is started to force the washing water in the washing machine to circulate through the circulation pump and the first branch of the lint filtering device successively, so that the circulation The lint in the water is filtered and collected at the lint filtering device; (2) In the drainage stage, the recoil inlet valve and drain valve are opened, and the tap water in the water inlet pipe is sprayed into the lint filter device through the second branch water inlet pipe, and the filter screen is reversely flushed, and the backflush with lint The flushing water flows through the pipeline to the circulating pump and the drain valve in turn to be discharged out of the washing machine. 6. The control method according to claim 5, characterized in that the circulation pump is activated during the last 3-5 minutes of the washing or rinsing phase. 7. The control method according to claim 5, characterized in that the recoil water inlet valve is opened for 10-20 seconds each time. 8. The control method according to claim 5, characterized in that: when the water level in the washing machine is discharged below the pulsator of the washing machine, the recoil water inlet valve is opened.