KR0140595B1 - Abnormal water level detector for dish washer - Google Patents

Abstract

The present invention relates to an abnormal water level control device for a dish washer, so that it is possible to accurately detect the abnormal water level using a floating body and a working lever. In the abnormal water level control apparatus according to the present invention, the washing water inlet of the water level control tank is formed spaced upward by a predetermined height from the bottom of the water level control tank.

And, the floating body is fixed to one side of the free end, the other free end of the action lever is installed to be rotatable to operate the water level detection switch when the float rises, both ends and the washing water in and out of the water level control tank Residual water removal pipe is installed over the side wall of the water level control tank so as to be lower than the height of the inlet.

Description

Abnormal water level detector for dish washer

1 is a cross-sectional view showing an example of a conventional water level sensor,

2 is a cross-sectional view showing another example of a conventional water level sensor;

3 is a schematic cross-sectional view of the dishwasher,

4 is a front sectional view showing a state before operation of the dishwasher water level detecting device according to the present invention;

Figure 5 is a side cross-sectional view showing a state before operation of the dishwasher water level detecting device according to the present invention,

6 is a side cross-sectional view showing a level sensing state according to the present invention.

* Explanation of symbols for main parts of the drawings

1 housing 2 cleaning tank

3: lower basket 4: upper basket

5, 6: upper and lower nozzle 7: washing water pump

8: water supply pipe 9: drain pump

10: washing tank 11: water level control tank

12: floating body 13: working lever

14: water removal pipe 15: water level detection switch

16: washing water inlet 18: rotating pin

The present invention relates to an abnormal water level detecting device for a dish washer for detecting abnormal water level of the washing tank.

The water level detection device, especially the water level detection device for a dishwasher, has a water level detection device which works in conjunction with the water level in order to control the amount of water supplied to the water storage tank. In the conventional water level detection device, when only a single water level detection device is used, there may be a problem such that excessive water is supplied when a malfunction occurs due to a failure or the like. A water level detection switch is provided, and an additional water level detection switch is further provided so that water supply can be stopped by detecting an allowable abnormal water level exceeding the proper water level in case of failure of the proper water level detection switch.

1 is a cross-sectional view showing an example of a conventional water level sensor. As can be seen in this figure, the conventional water level sensing device has a water level control tank 50 which is connected to the bottom of the washing tank 2 through the conduit 53, the water supply of the washing tank 2 can be introduced. . The water level control tank 50 is connected to the air chamber (not shown) through the air conduit 51 at the top, and the air can flow in and out, and the air conduit 51 has an extension portion 52 of the water level control tank 50. It is down to a considerable length inside. At the top of the water level control tank 50 is also provided a pair of sensing switches 55 and 57 respectively connected via air tubes 56 and 58. One of these sensing switches 55 is an appropriate level sensing switch operating at a relatively low pressure, and the other 57 is an abnormal level sensing switch operating at a relatively high pressure.

The conventional water level detecting device is introduced into the water level control tank 50 through the washing water conduit 53 supplied to the washing tank 2 by this configuration, and the air in the air chamber is compressed by the introduced water. The air in the water level control diagram 50 is also compressed. When the water flowing into the water level control tank 50 reaches the appropriate water level (A), the proper water level detection switch 55, which is operated to correspond to the pressure, is operated to block the water supply to the washing tank (2). Here, when the proper level detecting switch 55 does not operate normally due to a failure or the like, water is continuously introduced to further compress the air in the water level control tank 50. When the pressure of the air reaches a pressure corresponding to the preset abnormal level, the abnormal level detecting switch 57 operates to stop the water supply.

However, this conventional level sensor has a large range of detection errors because the detection switches operate based on the pressure of air, which is a pressurized fluid, so that they may operate simultaneously within an error range. In order to prevent this, there is a problem in that the range between the proper level and the abnormal level is unnecessarily wide. In addition, the water level control tank has a relatively large air pressure forming space has the disadvantage that the overall volume of the device is large.

2 is a cross-sectional view showing another example of the conventional water level detection device (Domestic Utility Publication No. 91-8624). In this water level sensing device, the floater 102 is liftably accommodated in the sensing container 101 communicated through the washing chamber and the connecting pipe member 103. The operating member 104 is moved up and down by the lifting movement of the float 102, and is rotatably installed in accordance with the lifting up and down of the operating member 104. In addition, a contact member 105 and a locking member 106 are provided in the upper region of the operating member 104 with a gap therebetween, and one end of the pressing member 107 on the bar is positioned between the operating member 104. Drain pump switch 109 and feed water pump switch 108 are installed around the upper end, and as shown in FIG. 2, when the float 102 is lowered, the pressing member 107 is a water pump switch 108 ) Is operated to feed water, and when the water level in the washing chamber increases and the float 102 rises, the contact member 105 operates the drain pump switch 109 to discharge the abnormal water supply.

By the way, in this conventional example, since a pair of switches 108 and 109 which control the proper water level and the abnormal water level are operated by a single float 102, the proper water level is generated when an operation abnormality occurs in the float 102. There is a problem that both the maintenance and the abnormal water level can be impossible to control. In addition, since the float continuously moves up and down in accordance with the change in the water level, there is a problem that the occurrence of a failure increases because the on / off operation of the switch and the opening / closing operation of the valve are frequently performed.

Accordingly, it is an object of the present invention to provide a water level sensing device which more accurately senses the water level of a washing tank, in particular, an abnormal water level, so that the switch can be operated only when the water level is above a predetermined level.

According to the present invention, the object is a water level control tank installed to accommodate a predetermined amount of washing water in the washing tank, and a floating body which can be lifted and moved by buoyancy depending on the level of the washing water contained in the water level control tank and introduced from the washing tank. And an abnormal water level sensing device for a dish washing machine having a level sensor switch installed outside the water level control tank, wherein the washing water inlet of the water level control tank is formed to be spaced upward from a bottom of the water level control tank by a predetermined height. The floating water is fixed to the other side, and the other free end is rotatably installed to operate the level sensor of the riser of the floating body, and both ends of the washing water inlet are lower than the height inside and outside the water level control tank. It includes a residual water removal pipe installed over the side wall of the water level control tank. It is achieved by the abnormal water level detection device for a dishwasher characterized in that.

Here, the water level detection device may be simply configured as a micro switch during the button operation.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic cross-sectional view of the dishwasher. It has a dishwasher outer housing (1) and a washing tank (2) installed therein, the washing tank (2) is provided with a lower basket (3) and an upper basket (4) for supporting the dish, and at the same time spraying the washing water The lower nozzle 5 and the upper nozzle 6 and the washing pump 7 for supplying the washing water to these nozzles 5 and 6 are provided. The washing pump 7 pumps the washing water when the washing water is supplied into the washing tank 2 through the water supply pipe 8 and feeds the washing water to the water spray nozzles 5 and 6. After washing, the washing water is drained by a drain pump.

Figure 4 is a front sectional view showing a state before the operation of the water level sensing device of the dishwasher according to the present invention, Figure 5 is a side cross-sectional view and Figure 6 is a side sectional view showing a state of the water level sensing device of the dishwasher according to the present invention.

As can be seen in these figures, the dishwasher equipped with the present water level sensing device has a water level control tank 11 having a washing water inlet 16 connected to the washing tank 10 to introduce the washing water of the washing tank. In the water level control tank 11, a floating body 12 which moves up and down by buoyancy according to the water level of the washing water introduced from the washing tank 10 is installed. On the outer side surface of the water level control tank, a water level detection switch 15 and a controller 17 for detecting a predetermined water level C of the washing tank 10 and stopping the water supply to the washing tank 10 are located. Between the floating body 12 and the water level detecting switch 15, an actuating lever 13 provided so as to be rotatable by the rotating piece 18 is provided, and one side free end of the actuating lever 13 is a floating body ( It is fixed to 12 and the other free end is adjacent to the button 19 of the water level detection switch 15, so that the water level detection switch 15 is operated when the floating body 12 rises by washing water.

By this configuration, the floating body 12 does not rise until the washing water in the washing tank 10 exceeds the water level C and flows into the water level control tank 11. Accordingly, the water level detection switch 15 also does not operate. However, when the washing water in the washing tank 10 exceeds the water level C and flows into the water level control tank 11 and reaches an appropriate constant water level, the floating body 12 starts to rotate upward. Accordingly, one end of the water level detection switch 15 side of the action lever 13 presses the button 19 of the water level detection switch 15 downward. When the water level detection switch 15 is operated by the pressurization of the button 19, the control unit 17 stops the water supply to the washing tank 10.

The water level control tank 11 is provided with a residual water removal pipe 13 whose one end is located in the bottom region of the water level control tank 11 and the other end is located in the bottom region of the washing tank 10. Residual water removal pipe 13 is to integrally drain the residual water in the water level control tank 11 when the washing water of the washing tank 10 is drained.

In the above-described and illustrated embodiments, the case in which the water level sensing device according to the present invention is applied to a dish washing tank to detect only a specific water level has been described. Steps can be applied, for example, as a water level sensing device to detect an appropriate level and an abnormal level. In addition, of course, it can be applied to all equipment, equipment that requires more accurate and sensitive water level detection.

As described above, according to the present invention, there is provided a level sensor and a dishwasher having the same, which can accurately detect the washing water exceeding a predetermined level, thereby increasing the reliability of the level detection.

Claims (2)

A water level control tank installed to accommodate a predetermined amount of washing water in the washing tank, a floating body accommodated in the water level control tank and capable of lifting and lowering by buoyancy according to the level of the washing water introduced from the washing tank, and installed outside the water level control tank. In the abnormal water level detecting device for a dish washer having a level sensing switch, the washing water inlet of the water level control tank is formed spaced upwards a predetermined height from the bottom of the water level control tank, the floating body is fixed to one free end, the other side free An actuating lever rotatably installed to operate the water level sensing switch when the float rises, and both ends are positioned across the side wall of the water level control tank such that both ends thereof are lower than the height of the washing water inlet in and outside the water level control tank. Dishwasher comprising a residual water removal pipe is installed Water level detection device. The abnormal water level detecting device according to claim 1, wherein the water level detecting switch is a micro switch when a button is operated.