KR200153791Y1 - The water level control apparatus of a drum washing machine - Google Patents

Abstract

The water level control device of the drum type washing machine is disclosed, which attaches a first chamber to enlarge the volume between the water level detection device and the drainage pump to buffer the increase in the water level due to a sudden temperature rise during water supply after drainage, In addition, it is possible to improve the performance of the washing machine by attaching a second chamber to prevent the siphon phenomenon that the sewage is continuously discharged through the drain pipe during water supply after drainage.

Description

Water level controller of drum type washing machine

1 is a schematic cross-sectional view of a drum type washing machine according to the prior art.

2 is a schematic cross-sectional view of a drum type washing machine having a water level control device according to the present invention.

* Explanation of symbols for main parts of the drawings

10: Case 12: Tub

14: washing tank 16: water supply device

18: water supply pipe 20: drain pipe

22: drain pump 24: water level detection device

28: discharge pipe 30: water level detection hose

32: first chamber 34: second chamber

The present invention relates to a water level control device for a drum type washing machine, and more particularly, to a level control device for a drum type washing machine using a structure serving as a temporary chamber for preventing rapid expansion of air pressure during water supply and backflow during drainage. will be.

In the drum type washing machine according to the related art, the tub 12 is fixed to the center portion of the case 10 as shown in FIG. 1, and the tub 12 is required to wash and dehydrate water by accommodating water in the tub 12. ) Is rotatably installed. The upper part of the case 10 is equipped with a water supply device 16 for supplying water into the washing tank 14 through the water supply pipe 18, a drain pump for draining the sewage to the outside when dewatering at the bottom of the case 10 (22) is provided. The drain pump 22 is provided in a drain pipe 20 for guiding drainage, and the drain pipe 20 is connected to the tub 12. In addition, a level sensor 24 for detecting the level of water in the tub 12 is installed inside the case 10, and the level sensor 24 is connected to the drain pump 22 by the level sensor hose 26. ) In addition, the tub 12 and the drain pipe 20 is provided with a discharge pipe 28 connected to both ends.

In such a drum type washing machine, when power is supplied to the water supply device 16, water is supplied from the outside to the washing tank 14 in the tub 12 through the water supply pipe 18, and when the water is full, the water in the washing tank 14 is discharged. The water is discharged to the outside through the discharge pipe 28 and the drain pipe 20.

On the other hand, the water level in the washing tank 14 and at the same time the water level in the water level detection hose 26 connected between the drainage pipe 20 and the water level detection device 24 is a water film to a certain portion less than the water level detection device 24. To form. When the water film in the water level detecting hose 26 rises up to the water level detecting device 24, the water level detecting device 24 controls the water level to block the water supply to the washing tank 14.

However, in the drum type washing machine according to the prior art configured as described above, if the hot water is discharged after washing is performed by hot water in the tub, for example, the temperature of the air maintained at high temperature by the hot water is lowered. Therefore, the pressure of the air in the tub and the discharge pipe is momentarily lowered, whereby the water to be supplied is sucked into the discharge pipe. As described above, the suctioned water is discharged to the outside through the discharge pipe and the drain pipe by the capillary phenomenon. That is, there is a problem in that a so-called siphon phenomenon occurs in which water newly supplied after drainage is not stored in the tub, but is continuously drained through the discharge pipe and the drain pipe.

In addition, in the case of the water level sensor for detecting the water level during water supply, the internal air pressure in the washing tank rapidly expands due to the rapidly expanding air pressure (especially when supplying hot water), so that the water film supplied in the water level control pipe is rapidly increased. There is a problem that the water level sensor detects the current water level higher than the actual water level and drains the water contained in the washing tank.

The present invention was devised to improve such a problem, and by forming an enlarged volume at a predetermined portion of the control member for detecting the water level in the washing tank, to prevent malfunction due to the siphon phenomenon generated during drainage and hot water supply, and the performance of the product An object of the present invention is to provide a water level detection device of a drum type washing machine to improve the temperature.

In order to achieve the above object, the water level control apparatus for a drum type washing machine according to the present invention includes a tub for receiving water supplied by a water supply pump, a drain pipe connected to the tub, and draining water in the tub through the drain pipe. A water level sensing device connected to the drain pipe, a water level sensing hose connected at one end to the water drain pump, and a water level sensing device connected to the other end of the water level sensing hose and sensing the water level in the tub through the water level in the water level sensing hose. To include; A first chamber provided in the water level detection hose to buffer the sudden air pressure by the water supply during water supply so that the water level detection device accurately detects the water level; A discharge pipe having one end connected to the tub, the other end connected to the drain pipe, and having a second chamber at a central portion thereof to prevent water from being continuously drained by a siphon phenomenon generated during water supply after draining; It is characterized in that it is provided with.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the water level control device of the drum type washing machine according to the present invention will be described in detail.

2 is a schematic cross-sectional view of a drum type washing machine having a water level control device according to the present invention. In FIG. 2, the same reference numerals as those in FIG. 1 indicate the same members, and thus detailed description thereof will be omitted.

As can be seen in FIG. 2, the water level detection hose 30 is provided with a first chamber 32 having an enlarged diameter, and the discharge pipe 28 connected to both the tub 12 and the drain pipe 20, respectively. The second chamber 34 is enlarged in diameter.

By providing the first chamber 32 as described above, even if the air pressure in the tub rises suddenly at the time of water supply, especially at the time of hot water supply, a large amount of air can be accommodated in the first chamber 32, so that the temperature rises rapidly. It is suppressed that the compressed air pressure is transmitted to the water level detecting device 24, and the sudden increase in the overall air pressure in the water supply path is suppressed. As such, the rapid increase in air pressure is suppressed by the first chamber, so that the water level detecting device 24 can accurately detect the water level of the water supply.

In addition, as described above, since the second chamber 34 is provided in the discharge pipe 28, the instantaneous decrease in the air pressure generated inside the discharge pipe 28 after the drainage is completed by the drain pump 22 is performed by the second chamber 34. Relaxed by the chamber 34. Therefore, the occurrence of the siphon phenomenon, that is, the phenomenon that the water newly supplied after draining, is continuously drained through the discharge pipe 28 and the drain pipe 20 by the instantaneous decrease in the air pressure as described above.

As described above, according to the water level control device of the drum-type washing machine according to the present invention, by installing the first chamber in the water level detection hose connected between the water level detection device and the drainage pump is to suppress the sudden increase in air pressure during water supply The water level can be accurately detected, and by installing the second chamber in the discharge pipe can prevent the occurrence of siphon phenomenon during drainage can improve the reliability of the product.

Claims (1)

A tub for receiving water supplied by the feed water pump, a drain pipe connected to the tub, a drain pump connected to the drain pipe to drain the water in the tub through the drain pipe, and a water level sensing hose connected at one end to the drain pump; And a water level sensing device connected to the other end of the water level sensing hose and sensing a water level in the tub through the water level in the water level sensing hose. A first chamber provided in the water level sensing hose so that the water level sensing device accurately detects the water level by releasing the sudden air pressure due to the water supply during water supply; A discharge pipe having one end connected to the tub, the other end connected to the drain pipe, and a second chamber provided at a central portion thereof to prevent water from being continuously drained by a siphon phenomenon generated during water supply after draining; The water level control device of the drum type washing machine, characterized in that it has been provided.