KR100733308B1 - Drum washing machine - Google Patents

Abstract

In the washing machine according to the present invention, three sensors contacting the foam are respectively mounted at different positions, and are configured to determine whether foam is generated according to a signal voltage difference generated between two sensors among the three sensors. There is an effect that can prevent the excessive generation of bubbles in advance by detecting whether the bubble is generated more quickly before the bubble is filled in the entire inside of the tub.

Washing Machine, Drum, Tub, Foam, Sensor, Terminals, Drying, Condensation, Exhaust

Description

Drum washing machine

1 is a front sectional view schematically showing the inside of a drum washing machine according to the prior art,

2 is an exploded perspective view showing a drum washing machine according to a first embodiment of the present invention;

3 is a longitudinal sectional view showing a drum washing machine according to a first embodiment of the present invention;

4 is a longitudinal sectional view showing a drum washing machine according to a second embodiment of the present invention;

5 is a longitudinal sectional view showing a drum washing machine according to a third embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

51,81,101: Tub 52,82,102: Drum

53,83,103: Motor 54: Base fan

55: cabinet body 56: cabinet cover

57: top plate 58,88: gun entrance hall

59,89,109: Door 60: Water supply

61: water supply hose 62: water supply valve

63: detergent container 64: water supply bellows

65: water inlet 66: drainage

67: drain bellows 68: drain pump

69: drain hose 70: air hole

71,91,111: first sensor 72,92,112: second sensor

73,93,113: third sensor 80,100: cabinet

84,104: circulation fan 85,105: drying heater

86,106: drying duct 87: condensation duct

90,110: Gasket 94: Cooling water supply

107: exhaust duct 108: filter

The present invention relates to a drum washing machine, in particular, by mounting the three sensors in contact with the foam in different positions, and is configured to determine whether the foam is generated according to the signal voltage difference generated between two of the three sensors The present invention relates to a drum washing machine capable of quickly and accurately detecting whether bubbles are generated before bubbles are filled in the tub.

In general, a washing machine is a device that removes contaminants on clothing or bedding (hereinafter, referred to as 'po') by using a detergent-dissolved water or clean water (hereinafter referred to as 'washing water'). .

1 is a front sectional view schematically showing the inside of a drum washing machine according to the prior art.

As shown in FIG. 1, the drum washing machine according to the related art is rotatable inside the cabinet 2, a tub 4 mounted inside the cabinet 2 to contain wash water, and a tub 4. It comprises a drum (6) is disposed so as to accommodate the cloth, and a motor (not shown) for rotating the drum (6).

The tub 4 is connected to a water supply device 8 for supplying the washing water supplied from the outside into the tub 4, and a drainage device 10 for draining the washing water inside the tub 4 to the outside. .

The drainage device 10 includes a drain hose 11 connected to the bottom of the tub 4 and a drain pump 12 connected to the drain hose 11.

On the other hand, the drum washing machine is a pressure sensor 14 installed to detect the water level of the wash water supplied into the tub 4, the pressure chamber 16 formed on the side of the drain hose 11, and the pressure sensor ( 14) further comprises a hydraulic pressure transmission unit 18 for connecting between the pressure sensor 14 and the pressure chamber 16 to deliver the hydraulic pressure of the wash water.

Referring to the foam detection method of the drum washing machine according to the prior art configured as described above are as follows.

When power is applied to the drum washing machine, washing water flows into the tub 4 through the water supply device 8.

At this time, when the wash water is filled in the tub 4, pressure is formed in the pressure chamber 16, and the pressure in the pressure chamber 16 changes according to the level of the wash water.

Therefore, the pressure sensor 14 detects the pressure change in the pressure chamber 16 through the hydraulic pressure transmitting unit 18, and accordingly, the controller (not shown) of the drum washing machine determines the level of the wash water. do.

On the other hand, when excessive foaming occurs in the tub 4 due to excessive use of detergent during washing, the pressure in the tub 4 rises above a certain value.

That is, since the pressure of the washing water and the pressure of the foam is added to increase the pressure than the case in which no foam is generated, it is possible to determine whether the foam is excessive according to the change of the value detected by the pressure sensor 14. do.

Therefore, when it is determined that excessive bubbles are generated, a bubble removing stroke in which drainage and water supply are repeated is performed.

However, the drum washing machine according to the prior art is configured to detect the excessive generation of bubbles only when the pressure inside the tub 4 rises by a predetermined value or more, so that the drum washing machine can detect the bubbles only after the bubbles are already filled. As a result, the defoaming stroke becomes long, and thus, there is a problem in that it takes much time and money to be washed, and there is a problem in that the risk of fire due to corrosion or short circuit of the surrounding parts cannot be prevented quickly.

The present invention has been made in order to solve the problems of the prior art, it is an object of the present invention to provide a drum washing machine that can reduce the unnecessary washing time and costs by more quickly and accurately detecting the generation of bubbles.

Drum washing machine according to the present invention for solving the above problems and the first sensor mounted on the inner lower portion of the tub to be in contact with the drum rotatably disposed inside the tub, the wash water or foamed water in the tub and A second sensor which is mounted at a position higher than the first sensor so as to contact the foam filling the inner side of the tub, and is electrically connected to the first sensor when bubbles are generated between the first sensor and the It is mounted at a position higher than the first sensor and spaced apart from the second sensor by a predetermined distance so as to come into contact with the foam filling the other side of the tub, and electrically connected to the first sensor when foam is generated between the first sensor. Whether bubbles are generated according to a signal voltage difference generated between the third sensor and the first sensor and the second sensor or between the first sensor and the third sensor. Characterized in that configured by a control unit.

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

2 is an exploded perspective view showing a drum washing machine according to a first embodiment of the present invention, Figure 3 is a longitudinal sectional view showing a drum washing machine according to a first embodiment of the present invention.

The drum washing machine according to the first embodiment of the present invention, as shown in Figures 2 and 3, the cabinet, a tub 51 supported in the interior of the cabinet, and rotatably inside the tub 51 It is comprised including the drum 52 arrange | positioned and the motor 53 which drives the said drum 52.

The cabinet includes a base fan 54, a cabinet main body 55 provided above the base fan 54, a cabinet cover 56 provided in front of the cabinet main body 55, and the cabinet main body 55. It consists of the top plate 57 provided in the upper surface of the cabinet cover 56. As shown in FIG.

The cabinet cover 56 has a fabric access hole 58 through which the fabric m enters and is formed, and a door 59 for opening and closing the fabric access hole 58 is rotatably mounted.

The tub 51 is connected to a water supply device 60 for supplying the washing water supplied from the outside into the tub 51, and a drainage device 66 for draining the washing water inside the tub 51 to the outside. .

The water supply device 60 is a water supply hose 61 for supplying the wash water from the outside, a water supply valve 62 for intermitting the wash water mounted on the water supply hose 61 and the water supply hose 61. And a water supply bellows 64 for guiding the washing water passing through the washing water tub 63 and the washing water passing through the washing water tub 63 to the tub 51.

The water supply bellows 64 is mounted in communication with a water supply port 65 formed at an upper side of the tub 51.

The drainage device 66 is connected to a lower portion of the tub 51 to drain the bellows 67 for guiding the wash water in the tub 51 and to drain the pumped wash water guided to the drain bellows 67. A pump 68 and a drain hose 69 for guiding the wash water pumped from the drain pump 68 to the outside of the cabinet.

On the other hand, the drum washing machine further comprises a foam sensor for sensing the bubbles in the tub 51, the foam sensor is the first sensor 71 mounted on the inner lower side of the tub 51 and And a second sensor 72 mounted at a position higher than the first sensor 71 and a third sensor mounted higher than the first sensor 71 and mounted at a predetermined distance from the second sensor 72. It consists of 73.

In addition, the drum washing machine may generate bubbles according to a signal voltage difference generated between the first sensor 71 and the second sensor 72 or between the first sensor 71 and the third sensor 73. It further comprises a control unit (not shown) for determining and controlling the operation of the drum washing machine.

The first, second and third sensors 71, 72 and 73 are each made of one electrode terminal which can be energized upon contact with bubbles.

Therefore, the first sensor 71 and the second sensor 72 are electrically connected by the bubbles generated between the first sensor 71 and the second sensor 72, the first sensor 71 And the third sensor 73 are electrically connected by the bubbles generated between the first sensor 71 and the third sensor 73.

The first sensor 71 is mounted in the space between the tub 51 and the drum 52 so that the washing water is always in contact with the washing water or foam when the washing water is supplied.

The second sensor 72 is mounted at a position higher than the first sensor 71 such that the second sensor 72 is in contact with the foam filling the inner side of the tub 51. Here, the water supply formed on the upper side of the tub 51 It demonstrates only to be attached to the inside of the sphere 65. FIG.

The third sensor 73 is mounted at a position higher than the first sensor 71 and spaced apart from the second sensor 72 by a predetermined distance so as to be in contact with the foam filling the other side of the tub 51. The upper part of the tub 51 will be described as being mounted inside the air hole 70 to allow air to flow into the tub 51.

The air hole 70 is formed to allow the child to breathe when the child enters into the drum 52, it is preferably formed in the highest position in the tub (51).

Therefore, the third sensor 73 is disposed at a position higher than the second sensor 72.

Looking at the foam detecting method of the drum washing machine according to the first embodiment of the present invention configured as described above are as follows.

When power is supplied to the drum washing machine, the washing water is introduced into the tub 51 through the water supply device 60, and when the washing water is filled in the tub 51, the first sensor 71 is connected to the washing water. Will come into contact.

At this time, when the foam is excessively generated in the tub 51 due to excessive use of detergent, and the foam is filled to the water inlet 65, the foam is brought into contact with the second sensor 72.

Accordingly, the bubbles filled from the lower side of the tub 51 to the water inlet 65 electrically connect the first and second sensors 71 and 72, and thus, the first sensor 71 and the second sensor. The resistance between the 72 becomes drastically small, and the signal voltage difference generated between the first sensor 71 and the second sensor 72 becomes small.

When the signal voltage difference between the first sensor 71 and the second sensor 72 becomes "0", the controller (not shown) determines that bubbles are generated and performs a bubble removing stroke in which drainage and water supply are repeated. Done.

When bubbles are removed through the bubble removing stroke and no bubbles exist between the first sensor 71 and the second sensor 72, electrical connection between the first sensor 71 and the second sensor 72 is performed. Will be broken.

Therefore, since the resistance between the first sensor 71 and the second sensor 72 increases indefinitely, the signal voltage difference between the first sensor 71 and the second sensor 72 is increased again, so that the control unit ( In the case of not shown), it is determined that the foam is removed, and performs the washing administration.

On the other hand, when the bubbles generated in the tub 51 is filled to the air hole 70 side, the bubbles are in contact with the third sensor (73).

Accordingly, the bubbles filled from the lower side of the tub 51 to the air hole 70 electrically connect the first and third sensors 71 and 73, and thus, the first sensor 71 and the third sensor. The resistance between the 73 becomes sharply small, and the signal voltage difference generated between the first sensor 71 and the third sensor 73 becomes small.

When the signal voltage difference between the first sensor 71 and the third sensor 73 becomes "0", the controller (not shown) determines that bubbles are generated and performs a bubble removing stroke in which drainage and water supply are repeated. Done.

Here, since the mounting positions of the first sensor 71 and the second and third sensors 72 and 73 are far from each other, the first sensor 71 and the second and third sensors 72 in a state where no bubbles are generated. A water film is not formed between the (73).

Thus, erroneous detection that bubbles are generated due to the water film formed between the sensors can be prevented.

In addition, since the second sensor 72 and the third sensor 73 are disposed separately from each other at a predetermined interval, the second sensor 72 and the third sensor 72 before the bubble is filled in the tub 51. Even if bubbles are in contact with at least one of the sensors 73, the controller (not shown) may determine whether bubbles are generated.

Therefore, since the bubble removal stroke is performed before the bubble is filled in the tub 51, not only can the bubble be prevented from occurring in advance, but water and time can be reduced to reduce water and time waste. .

Figure 4 is a longitudinal sectional view showing the inside of the drum washing machine according to a second embodiment of the present invention.

The drum washing machine according to the second embodiment of the present invention is a condensation type combined washing machine, and as shown in FIG. 4, a cabinet 80, a tub 81 supported inside the cabinet 80, and the tub A drum 82 rotatably disposed inside the 81, a motor 83 for driving the drum 82, a circulation fan 84 and drying to supply hot air into the drum 82. A drying duct 86 having a heater 85 and a condensation duct 87 which guides the drying duct 86 to the drying duct 86 after condensing the air having dried the cloth m inside the drum 82. It is configured to include.

The cabinet 80 has a fabric access hole 88 formed on one surface thereof to allow the fabric m to enter and exit, and a door 89 for opening and closing the fabric access hole 88 is mounted.

The tub 81 is equipped with a gasket 90 which is in close contact with the door 89 when the door 89 is closed and prevents the cloth m, the washing water, and the air from flowing out between the door 89. .

The discharge portion of the drying duct 86 may be connected to the gasket 90 so as to discharge hot air into the tub 81, and may be directly connected to the tub 81, where the gasket ( It will be described as being connected to 90).

The suction part of the condensation duct 87 is connected to the bottom of the bottom of the tub 81, the discharge part is connected to the drying duct 86, the cooling water supply device for supplying coolant from the outside to the condensation duct (87) 94 is connected.

On the other hand, the drum washing machine further comprises a foam sensor for sensing the bubbles in the tub 81, the foam sensor is a first sensor 91 mounted on the inner lower side of the tub, A second sensor 92 mounted at a position higher than the first sensor 91 and a third sensor mounted at a position higher than the first sensor 91 and spaced apart from the second sensor 92 by a predetermined distance ( 93).

In addition, the drum washing machine determines whether bubbles are generated according to a signal voltage difference generated between the first sensor 91 and the second sensor 92 and between the first sensor 91 and the third sensor 93. It further comprises a control unit (not shown) to determine.

The first, second and third sensors 91, 92 and 93 are each made of one electrode terminal that can be energized when contacted with bubbles.

Here, the first sensor 91 is mounted in the space between the tub 81 and the drum 82 so that the washing water is always in contact with the washing water or foam when the washing water is supplied.

The second sensor 92 is mounted at a position higher than the first sensor 91 such that the second sensor 92 is in contact with the foam filling the inner side of the tub 81. Here, the second sensor 92 is filled with the foam filling the upper front side of the tub 81. It is limited to being attached to the discharge part of the said drying duct 86 so that it may contact.

In addition, the third sensor 93 is mounted at a position higher than the first sensor 91 and spaced apart from the second sensor 92 by a predetermined distance so as to be in contact with the foam filling the other side of the tub 81. Here, the description will be limited to that mounted on the discharge side of the condensation duct 87.

The foam detecting method of the drum washing machine according to the second embodiment of the present invention configured as described above is the same as the first embodiment, so a detailed description thereof will be omitted.

On the other hand, in the drum washing machine according to the second embodiment of the present invention configured as described above whether the foam is generated by the second and third sensors 92, 93 before the foam is filled up to the inside of the drying duct 86 Since it is sensed, it is possible to prevent corrosion and insulation breakdown of the components in the drying duct 86 to occur in advance, so that the drying stroke can be safely performed.

5 is a longitudinal sectional view showing the inside of the drum washing machine according to the third embodiment of the present invention.

The drum washing machine according to the third embodiment of the present invention is an exhaust type combined washing machine, and as shown in FIG. 5, a cabinet 100, a tub 101 supported inside the cabinet 100, and A drum 102 rotatably disposed in the tub 101, a motor 103 for driving the drum 102, a circulation fan 104, and drying to supply hot air into the drum 102. It comprises a drying duct 106 is provided with a heater 105, and an exhaust duct 107 for discharging the air to dry the cloth (m) in the drum 102 to the outside.

The cabinet 100 has a fabric access hole 108 formed on one surface thereof to allow the fabric m to come in and out, and a door 109 for opening and closing the fabric access hole 108 is mounted.

The tub 101 is equipped with a gasket 110 which is in close contact with the door 109 when the door 109 is closed and prevents the cloth m, the washing water, and the air from flowing out between the door 109. .

The discharge portion of the drying duct 106 may be connected to the gasket 110 so as to discharge hot air into the tub 101, or may be directly connected to the tub 101, in this case the gasket. It will be described limited to connected to (110).

The exhaust duct 107 is connected to the upper rear of the tub 101, and a filter 108 is mounted on the exhaust duct 107 to purify the air dried in the fabric (m).

In addition, the drum washing machine further comprises a foam sensor for sensing the bubbles generated in the tub 101, the foam sensor is to be in contact with the wash water or foam water supplied into the tub 101 The first sensor 111 mounted on the inner lower side of the tub 101, the second sensor 112 mounted at a position higher than the first sensor 111, and higher than the first sensor 111 It consists of a second sensor 112 and the third sensor 113 mounted at a position spaced apart by a predetermined interval.

In addition, the drum washing machine generates bubbles according to a signal voltage difference generated between the first sensor 111 and the second sensor 112 and between the first sensor 111 and the third sensor 113. It further comprises a control unit (not shown) to determine.

The first, second, and third sensors 111, 112, and 113 are each made of one electrode terminal that can be energized upon contact with bubbles.

Here, the first sensor 111 is mounted in the space between the tub 101 and the drum 102 so that the washing water is always in contact with the washing water or foam when the washing water is supplied.

The second sensor 112 is mounted at a position higher than the first sensor 111 so as to contact the foam filling the inner side of the tub 101, in which the foam filling the upper front of the tub 101 and It is limited to being attached to the discharge part of the said drying duct 106 so that it may contact.

In addition, the third sensor 113 is mounted at a position higher than the first sensor 111 and spaced apart from the second sensor 112 by a predetermined distance so as to be in contact with the foam filling the other side of the tub 101. Here, the description will be limited to being mounted inside the exhaust duct 107.

Since the foam detecting method of the drum washing machine according to the third embodiment of the present invention configured as described above is the same as the first embodiment, a detailed description thereof will be omitted.

On the other hand, in the drum washing machine according to the third embodiment of the present invention configured as described above whether the foam is generated by the second and third sensors 102 and 103 before the foam is filled up to the inside of the exhaust duct 107. Since it is sensed, the exhaust flow rate is reduced due to the bubbles filled in the exhaust duct 107 to prevent the drying performance from being lowered.

In addition, it is possible to prevent in advance the occurrence of corrosion and dielectric breakdown of the components in the drying duct 106, so that the drying stroke can be performed safely.

In the drum washing machine according to the present invention configured as described above, three sensors contacting the foam are respectively mounted at different positions, and whether foam is generated according to a signal voltage difference generated between two sensors among the three sensors. It is configured to determine, there is an effect that can prevent the excessive generation of bubbles in advance by detecting whether the bubble is generated more quickly before the bubble is filled in the entire inside of the tub.

In addition, since the bubble removal stroke is performed before the bubble is full, the number of times of water supply and drainage is reduced, thereby reducing the waste of water and time.

In addition, since the distance between the first sensor and the second sensor or the first sensor and the third sensor is far, it is difficult to form a water film between the sensors in the absence of a bubble, so that the occurrence of bubbles due to the water film is not detected. There is an advantage that can be prevented.

In addition, the condensation-type combined-use washing machine according to the present invention can prevent the generation of bubbles before the foam is filled to the drying duct, it is possible to prevent corrosion and dielectric breakdown of the components in the drying duct safety This has the effect of being improved.

In addition, since the combined use of the exhaust type washing machine according to the present invention can detect whether bubbles are generated before bubbles rise to the inside of the exhaust duct, the exhaust flow rate is reduced due to the bubbles filled in the exhaust duct, thereby reducing drying performance. There is an effect that can be prevented.

Claims (9)

A drum rotatably disposed in the tub; A first sensor mounted inside the tub so as to be in contact with the wash water or the foamed water in the tub; A second sensor mounted at a position higher than the first sensor to be in contact with the foam filling the inner side of the tub, and electrically connected to the first sensor when bubbles are generated between the first sensor; It is mounted at a position higher than the first sensor and spaced apart from the second sensor by a predetermined distance so as to contact the foam filling the other side of the tub, and when the foam is generated between the first sensor and the first sensor, A third sensor connected; A controller for determining whether bubbles are generated according to a signal voltage difference generated between the first sensor and the second sensor or between the first sensor and the third sensor; A drying duct provided with a circulation fan and a drying heater to supply hot air into the drum; An exhaust duct for discharging air dried in the drum to the outside; The first, second and third sensors are made of an electrode terminal capable of energizing the bubble when in contact with the bubble. The second sensor is mounted in the drying duct, the third sensor is mounted in the exhaust duct drum washing machine. delete delete delete delete delete delete delete delete

Images