KR100748977B1 - Drum washing machine - Google Patents

Abstract

In the drum washing machine according to the present invention, the main electrode and the auxiliary electrode contacting the foam are respectively mounted at different positions, and the drum washing machine is configured to determine whether the foam is generated according to the signal voltage difference generated between the main electrode and the auxiliary electrode. In addition, the main electrode and the auxiliary electrode have only one foam electrode terminal separately. By mounting and constructing a pair of temperature electrode terminals and integral parts without mounting, it is possible to detect whether there is an electrical connection abnormality by the signal value of the temperature electrode terminal when the electrical connection of the foam electrode terminal is disconnected. It is possible to prevent erroneous detection of the generation of bubbles by an electrical short circuit of the foam sensor unit. A.

Washing Machines, Tubs, Drums, Foam, Sensors, Terminals, Electrodes, Connectors, Receptacles

Description

Drum washing machine

Figure 2 is a schematic diagram showing the interior of the drum washing machine according to a first embodiment of the present invention,

3 is a perspective view showing a main electrode according to a first embodiment of the present invention;

4 is an exploded perspective view of the main electrode according to the first embodiment of the present invention;

5 is a perspective view showing a temperature sensor unit and a foam sensor unit according to the first embodiment of the present invention;

6 is a perspective view illustrating a main sensor of a drum washing machine according to a second embodiment of the present invention;

7 is a perspective view showing a temperature sensor unit and a foam sensor unit according to a second embodiment of the present invention;

8 is a schematic view showing the inside of a drum washing machine according to a third embodiment of the present invention;

Figure 9 is a schematic diagram showing the interior of the drum washing machine according to a fourth embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

50: cabinet 51: tub

52; Drum 53: Motor

54: four entrance hall 55: door

56: water supply 57: drainage

58: water supply port 59: air hole

60: main electrode 61: first auxiliary electrode

62: second auxiliary electrode 63: temperature sensor

63a: temperature electrode terminal 63b: thermistor

63c: case 64: foam sensor

64a: foam electrode terminal 65: sensor housing

66: fixing plate 70: connector

71: receptacle 72: plug

73: code

The present invention relates to a drum washing machine, and more particularly, to a drum washing machine capable of quickly and accurately detecting whether a bubble is generated inside a tub, and detecting an abnormal electrical connection of a foam electrode terminal.

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

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 whether the foam is excessive when the pressure inside the tub 4 rises above a predetermined value, so that the detection is possible only after the foam is already filled inside the tub 4. Therefore, since the foam reduction stroke is lengthened, there is a problem that the washing time and the cost are consumed a lot, and there is a problem that the risk of fire due to corrosion or short circuit of surrounding parts can not be prevented quickly.

On the other hand, in recent years, a foam sensor made of an electrode terminal is used to detect the foam, but when the connection line of the foam sensor is disconnected or a poor contact occurs, it is determined that no foam is generated, thereby preventing excessive foaming. There is no problem.

The present invention has been made to solve the above problems of the prior art, it is an object of the present invention to provide a drum washing machine that can detect whether the bubble is generated more quickly and accurately, and whether or not the electrical connection of the bubble sensor. .

Drum washing machine according to the present invention for solving the above problems is a drum rotatably disposed in the inside of the tub, the main electrode mounted on the lower side of the tub, the main electrode is mounted at a position higher than the main electrode and And a control unit for determining whether bubbles are generated according to a signal voltage difference generated between the main electrode and the auxiliary electrode when bubbles are generated between the main electrodes and the main electrodes. The electrode and the auxiliary electrode, respectively, is characterized in that the temperature sensor unit for sensing the temperature of the wash water supplied into the tub, and the foam sensor unit is connected to the temperature sensor unit and one connector to detect the foam in the tub.

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

Figure 2 is a schematic diagram showing the inside of the drum washing machine according to a first embodiment of the present invention, Figure 3 is a perspective view showing a main electrode according to a first embodiment of the present invention, Figure 4 is a first view of the present invention 5 is an exploded perspective view of a main electrode according to an embodiment, and FIG. 5 is a perspective view showing a temperature sensor unit and a foam sensor unit according to a first embodiment of the present invention.

As shown in FIGS. 2 to 5, the drum washing machine according to the first embodiment of the present invention includes a cabinet 50, a tub 51 supported inside the cabinet 50, and the tub 51. A drum 52 rotatably disposed in the interior thereof, a motor 53 for driving the drum 52, and washing water or foam mounted on the lower side of the tub 51 and supplied into the tub 51; And an auxiliary electrode electrically connected to the main electrode 60 when bubbles are generated between the main electrode 60 in contact with the main electrode 60 and the main electrode 60. 61 and 62, and a controller (not shown) for determining whether bubbles are generated according to the signal voltage difference generated between the main electrode 60 and the auxiliary electrodes 61 and 62.

The cabinet 50 has a fabric access hole 54 through which the fabric m enters, and a door 55 for opening and closing the fabric access hole 54 is rotatably mounted.

The tub 51 is connected to a water supply device 56 for supplying the washing water supplied from the outside into the tub 51, and a drainage device 57 for draining the washing water inside the tub 51 to the outside. .

The water supply device 56 includes a water supply hose 56a for supplying wash water from the outside, a water supply valve 56b mounted on the water supply hose 56a to control the water supply, and the water supply hose 56a. And a water supply bellows 56d for guiding the washing water passing through the washing water container 56c and the washing water passing through the washing water container 56c to the tub 51.

The water supply bellows 56d is mounted in communication with a water supply port 58 formed at an upper side of the tub 51.

The drainage device 57 is connected to the bottom of the tub 51 to drain the bellows (57a) for guiding the wash water in the tub 51, and drainage for pumping the wash water guided to the drain bellows (57a) A pump 57b and a drain hose 57c for guiding the wash water pumped from the drain pump 57b to the outside of the cabinet 50.

An air hole 59 is formed at an upper portion of the tub 51 to allow air to flow into the tub 51. The air hole 59 is a small hole when a child enters the drum 52. It is preferable to be formed at the highest position in the tub 51 to allow the child to breathe.

Meanwhile, the auxiliary electrodes 61 and 62 may be mounted to the water inlet 58 or the air hole 59, but both of the auxiliary electrodes 61 and 62 may be mounted to each of the water inlet 58 and the air hole 59. The description will be limited to that.

That is, the auxiliary electrodes 61 and 62 are formed of the first auxiliary electrode 61 mounted to the water supply port 58 so as to be in contact with bubbles rising to one side of the tub 51 and the tub 51. The second auxiliary electrode 62 is mounted to the air hole 59 so as to be in contact with the foam filling the other side.

Meanwhile, as shown in FIGS. 3 to 5, the main electrode 60 and the auxiliary electrodes 61 and 62 respectively have a temperature sensor 63 which senses the temperature of the wash water supplied into the tub 51. ) And a foam sensor unit 64 connected to the temperature sensor unit 63 and one connector 70 to detect bubbles in the tub 51.

The temperature sensor unit 63 includes a thermistor 63b for sensing a temperature and two temperature electrode terminals 63a connected to the thermistor 63a, and the foam sensor unit 64 is in contact with bubbles. It consists of one foam electrode terminal 64a capable of energizing at the time.

The temperature sensor 63 is wrapped by the case 63c so that the thermistor 63a does not directly contact the wash water, and the case 63c is made of a synthetic resin material.

In addition, the temperature sensor 63 and the foam sensor 64 are mounted on a cylindrical sensor housing 65 having an open bottom, and the temperature electrode terminal 63a and the foam electrode terminal 64a are formed in the cylindrical housing. It is mounted to be exposed to the bottom.

A fixing plate 66 is mounted on the bottom surface of the sensor housing 65 to fix the temperature sensor unit 63 and the foam sensor unit 64. The fixing plate 66 is the sensor housing 65. It is joined to the bottom of the by indentation or welding.

The temperature electrode terminal 63a and the bubble electrode terminal 64a are integrally connected by one connector 70.

The connector 70 is fixed to a bottom surface of the fixing plate 66 and has a receptacle 71 in which a plurality of terminal groove portions 71a are formed to insert the temperature electrode terminal 63a and the foam electrode terminal 64a. The plug 72 is inserted into and coupled to the rear of the receptacle 71 to electrically connect the temperature electrode terminal 63a and the foam electrode terminal 64a.

The receptacle 71 and the plug 72 are formed to be male and female coupled, and the plug 72 is connected to a cord 73 for supplying current.

The receptacle 71 may be formed integrally with the fixed plate 66, but the present invention will be described as being press-fitted to the fixed plate 66.

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 56, and when the washing water is filled in the tub 51, the main electrode 60 contacts the washing water. Will be.

The temperature sensor unit 63 of the main electrode 60 detects the temperature of the contacted wash water and transmits the detected signal to the controller (not shown).

Since the bubble sensor unit 64 of the main electrode 60 is composed of one bubble electrode terminal 64a, the bubble sensor unit 64 does not independently detect the bubble.

At this time, when the foam is excessively generated in the tub 51 due to excessive use of a detergent, and the foam is filled to the water supply port 58, the first auxiliary electrode mounted on the water supply port 58 ( Bubbles come into contact with the foam sensor of 61).

Accordingly, bubbles filled up from the lower side of the tub 51 to the water inlet 58 are electrically connected to the bubble sensor unit 64 of the main electrode 60 and the bubble sensor unit of the first auxiliary electrode 61. As a result, the resistance between the foam sensor unit 64 of the main electrode 60 and the foam sensor unit of the first auxiliary electrode 61 is reduced rapidly, and the foam sensor unit 64 of the main electrode 60 is reduced. ) And the signal voltage difference generated between the bubble sensor unit of the first auxiliary electrode 61 becomes small.

When the signal voltage difference between the bubble sensor unit 64 of the main electrode 60 and the bubble sensor unit of the first auxiliary electrode 61 becomes "0", the controller (not shown) determines that bubbles are generated and drains the water. The bubble removing stroke is repeated with water and water supply.

After the bubble is removed through the bubble removing stroke, the electrical connection between the bubble sensor unit 64 of the main electrode 60 and the bubble sensor unit of the first auxiliary electrode 61 is terminated.

Therefore, since the resistance between the bubble sensor unit 64 of the main electrode 60 and the bubble sensor unit of the first auxiliary electrode 61 increases again to infinity, the bubble sensor unit 64 of the main electrode 60 is increased. ) And the signal voltage difference between the bubble sensor unit of the first auxiliary electrode 61 is increased again, and it is determined that there is no bubble in the controller (not shown), and the washing operation is performed.

On the other hand, when the bubbles generated in the tub 51 is filled to the air hole 59 side, the bubbles are in contact with the bubble sensor portion of the second auxiliary electrode 62.

Accordingly, the bubbles filled from the lower side of the tub 51 to the air hole part 59 electrically connect the bubble sensor part 64 of the main electrode 60 to the bubble sensor part of the second auxiliary electrode 62. Therefore, the resistance between the foam sensor unit 64 of the main electrode 60 and the foam sensor unit of the second auxiliary electrode 62 is reduced rapidly, and the foam sensor unit 64 of the main electrode 60. And a difference in signal voltage generated between the bubble sensor unit of the second auxiliary electrode 62 is reduced.

When the signal voltage difference between the bubble sensor unit 64 of the main electrode 60 and the bubble sensor unit of the second auxiliary electrode 62 becomes "0", the controller (not shown) determines that bubbles are generated and drains the water. The defoaming cycle is repeated with water and water supply.

In this case, since the distance between the main electrode 60 and the first and second auxiliary electrodes 61 and 62 is far, the main electrode 60 and the first and second auxiliary electrodes 61 are free from bubbles. Since no water film is formed between the 62, misdetection that bubbles are generated due to the water film formed between the sensors can be prevented.

In addition, since the first auxiliary electrode 61 and the second auxiliary electrode 62 are separately disposed at predetermined intervals, the first auxiliary electrode 61 before the bubble is filled in the tub 51. Even if bubbles are in contact with only at least one of the second auxiliary electrode 62, the controller (not shown) may determine whether bubbles are generated.

On the other hand, when the main electrode 60 and the first and second auxiliary electrodes 61 and 62 are in poor contact with the connector 70 or the cord 73 is removed, the temperature sensor unit 63 Since the electrical connection is cut off between the two temperature electrode terminals 63a of the circuit configuration, the resistance value of the temperature sensor 63 increases indefinitely.

The controller (not shown) may determine whether the main electrode 60 and the first and second auxiliary electrodes 61 and 62 are short-circuited when the resistance of the temperature sensor 63 increases to infinity. Will be.

6 is a perspective view illustrating a main sensor of a drum washing machine according to a second embodiment of the present invention, and FIG. 7 is a perspective view illustrating a temperature sensor unit and a foam sensor unit according to a second embodiment of the present invention.

The drum washing machine according to the second embodiment of the present invention is mounted at a position higher than the main electrode 80 and the main electrode 80 mounted below the tub (not shown). When bubbles are generated in the bubble, whether or not bubbles are generated according to a signal voltage difference generated between the auxiliary electrode (not shown) electrically connected to the main electrode 80 and the main electrode 80 and the auxiliary electrode (not shown). It is configured to include a control unit (not shown) for determining.

The main electrode 80 and the auxiliary electrode (not shown) have the same internal configuration, respectively, a temperature sensor unit 81 for sensing the temperature of the wash water supplied into the tub (not shown), and the temperature sensor unit ( 81 is connected to one connector 83 and consists of a bubble sensor unit for detecting bubbles in the tub (not shown). The temperature sensor unit 81 includes a thermistor 81b and two temperature electrodes for detecting temperature. Other components and functions are included, except that the foam sensor part is a case 82 surrounding the temperature sensor part 81 such that the temperature sensor part 81 does not come into contact with the wash water. Is the same as the first embodiment, the same reference numerals are used and detailed description thereof will be omitted.

Here, the case 82 is made of a material having a conductive property that can be energized when in contact with the foam.

The case 82 has an upper side formed to surround the thermistor 81b, and a lower side formed to be open to expose the temperature electrode terminal 81a and downward to serve as a bubble electrode terminal connected to the connector. A protruding protrusion 82a is formed.

An epoxy is filled in the case 82 to insulate and fix the temperature electrode terminal 81a.

The case 82 is mounted to a cylindrical sensor housing 84 having an open bottom, so that the temperature electrode terminal 81a and the protrusion 82a are exposed to the bottom.

The connector 83 is fixed to a bottom surface of the sensor housing 84 and has a receptacle 85 formed with a plurality of terminal grooves to insert the temperature electrode terminal 81a and the protrusion 82a, and the receptacle 85 of the receptacle 85. The plug 86 is inserted into and coupled to the rear to electrically connect the temperature electrode terminal 81a and the protrusion 82a.

The receptacle 85 and the plug 86 are formed to be male and female coupled, and the plug 86 is connected to a cord 87 for supplying a current.

The two temperature electrode terminals 81a and the protrusions 82a are integrally connected by the connector 83.

According to the second embodiment of the present invention configured as described above, bubbles filled up from the lower side of the tub 51 to the water supply port 58 or the air hole 59 are combined with the case 82 of the main electrode 80. The case 82 of the main electrode 80 and the case of the auxiliary electrode are electrically connected to the case of the auxiliary electrode.

8 is a schematic view showing the inside of a drum washing machine according to a third embodiment of the present invention.

The drum washing machine according to the third embodiment of the present invention is a condensation type combined washing machine, and as shown in FIG. 8, a cabinet 90, a tub 91 supported inside the cabinet 90, and A drum 92 rotatably disposed inside the tub 91, a motor 93 driving the drum 92, a circulation fan 94 to supply hot air into the drum 92, and The drying duct 96 is provided with a drying heater 95 and the condensation duct 97 for condensing the air drying the cloth m in the drum 92 and then guiding the drying duct 96. It is configured to include.

The cabinet 90 has a fabric access hole 98 formed on one surface thereof to allow the fabric m to enter and exit, and a door 99 for opening and closing the fabric access hole 98 is mounted.

The tub 91 is attached to the gasket 100 to be in close contact with the door 99 when the door 99 is closed, so that cloth, laundry water, and air do not flow out between the door 99.

The outlet of the drying duct 96 may be connected to the gasket 100 so as to discharge hot air into the tub 91, and may be directly connected to the tub 91, where the gasket ( It will be described as limited to 100).

The suction part of the condensation duct 97 is connected to the lower bottom of the tub 91, the discharge part is connected to the drying duct 96, the cooling water supply device for supplying cooling water to the condensation duct 97 from the outside ( 101 is connected.

On the other hand, the drum washing machine is mounted on the lower side of the tub 91, the main electrode 102 in contact with the wash water or foam water supplied into the tub 91, and mounted at a position higher than the main electrode 102 When bubbles are generated between the main electrodes 102, the auxiliary electrodes 103 and 104 electrically connected to the main electrodes 102, the main electrodes 102 and the auxiliary electrodes 103 and 104. And a control unit (not shown) for determining whether bubbles are generated according to the signal voltage difference generated between the plurality of electrodes, and the main electrode 102 and the auxiliary electrode 103 and 104 are respectively tubs 91. The temperature sensor unit 63 for sensing the temperature of the wash water supplied into the water, and the foam sensor unit for connecting the temperature sensor unit 63 and one connector 70 to detect the bubbles in the tub 91 ( 64).

The temperature sensor unit 63 is composed of two temperature electrode terminals, and the bubble sensor unit is formed of one foam electrode terminal which can be energized upon contact with the foam.

Here, the auxiliary electrodes 103 and 104 are the first auxiliary electrode 103 mounted to the discharge portion of the drying duct 96 and the tub so as to contact the bubbles rising to one side of the tub 91, the tub ( The main electrode 102 and the auxiliary electrode 103 (except that the second auxiliary electrode 104 is mounted on the discharge side of the condensation duct 97 so as to be in contact with the foam filling the other side of the inside of the 91). Since the internal structure and operation of 104 are the same as in the first embodiment, the same reference numerals are used, and detailed description thereof will be omitted.

Figure 9 is a schematic diagram showing the interior of the drum washing machine according to a fourth embodiment of the present invention.

The drum washing machine according to the fourth embodiment of the present invention is an exhaust type combined washing machine, and as shown in FIG. 9, a cabinet 110, a tub 111 supported inside the cabinet 110, and A drum 112 rotatably disposed in the tub 111, a motor 113 for driving the drum 112, a circulation fan 114, and drying to supply hot air into the drum 112. It comprises a drying duct 116 provided with a heater 115, and an exhaust duct 117 for discharging the air to dry the cloth (m) in the drum 112 to the outside.

The cabinet 110 has a fabric access hole 118 formed on one surface thereof to allow the fabric to enter and exit, and is equipped with a door 119 for opening and closing the fabric access hole 118.

The tub 111 is attached to the gasket 120 to be in close contact with the door 119 when the door is closed to prevent the cloth, washing water, and air from flowing out between the door 119.

The outlet of the drying duct 116 may be connected to the gasket 120 so as to discharge hot air into the tub 111, and may be directly connected to the tub 91, where the gasket ( It will be described as limited to 120).

The exhaust duct 117 is connected to the upper rear of the tub 111, the filter 121 for purifying the air dried in the cloth (m) is mounted on the exhaust duct 117.

On the other hand, the drum washing machine is mounted on the lower side of the tub 111, the main electrode 122 in contact with the wash water or foam water supplied into the tub 111, and is mounted at a position higher than the main electrode 122 When bubbles are generated between the main electrodes 122, the auxiliary electrodes 123 and 124 electrically connected to the main electrodes 122, and the main electrodes 122 and the auxiliary electrodes 123 and 124. It further comprises a control unit (not shown) for determining whether the bubble is generated according to the signal voltage difference generated between the).

In addition, the main electrode 122 and the auxiliary electrode 123 and 124 are respectively a temperature sensor 63 for sensing the temperature of the wash water supplied into the tub 111, and the temperature sensor 63 Is connected to one connector 70 is made of a foam sensor unit 64 for detecting the bubbles in the tub (111).

The temperature sensor unit 63 is composed of two temperature electrode terminals, and the bubble sensor unit 64 is formed of one foam electrode terminal which can be energized upon contact with bubbles.

Here, the auxiliary electrodes 123 and 124 are the first auxiliary electrode 123 mounted to the discharge portion of the drying duct 116 and the tub so as to be in contact with the bubbles rising to one side of the tub 111. The main electrode 122 and the auxiliary electrodes 123 and 124 except for the second auxiliary electrode 124 mounted inside the exhaust duct 117 to be in contact with the foam filling the other side of the inside 111. Since the internal configuration and operation of) are the same as in the first embodiment, detailed description thereof will be omitted.

Drum washing machine according to the present invention is configured as described above is the main electrode and the auxiliary electrode which is in contact with the foam are respectively mounted at different positions, and whether the foam is generated according to the signal voltage difference generated between the main electrode and the auxiliary electrode 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, the main electrode and the auxiliary electrode may be configured by mounting a single component by a pair of temperature electrode terminals and a connector instead of a single foam electrode terminal separately, so that the electrical connection of the foam electrode terminal is broken. Since it is possible to detect whether there is an electrical connection abnormality by the signal value of the temperature electrode terminal, there is an effect that erroneous detection of the generation of bubbles by the electrical short circuit of the foam sensor unit can be prevented.

In addition, since the foam sensor unit is formed of only one foam electrode terminal, and the distance between the main electrode and the first auxiliary electrode or the main electrode and the second auxiliary electrode is far, a water film is formed between the sensors in the absence of bubbles. Since it is difficult to prevent, there is an advantage that the misdetection of the generation of bubbles due to the water film can be prevented.

In addition, since the foam sensor unit is formed of a case surrounding the temperature sensor unit so as to be energized upon contact with the foam, there is an advantage that the structure can be simplified.

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 (11)

A drum rotatably disposed in the tub; A main electrode mounted below the tub and having a temperature sensor unit for sensing a temperature of the wash water supplied into the tub, and a foam sensor unit connected to the temperature sensor unit and a connector; Mounted at a position higher than the main electrode, and connected to the temperature sensor unit for sensing the temperature of the wash water supplied into the tub, the temperature sensor unit and one connector, the foam between the foam sensor unit of the main electrode At least one auxiliary electrode having a foam sensor unit electrically connected to the foam sensor unit of the main electrode when generated; And a controller for determining whether bubbles are generated according to a signal voltage difference generated between the bubble sensor unit of the main electrode and the bubble sensor unit of the auxiliary electrode. The temperature sensor part of the main electrode and the temperature sensor part of the auxiliary electrode are each composed of two terminals, and the bubble sensor part of the main electrode surrounds the temperature sensor part of the main electrode and is formed to be energized with the bubble when in contact with the bubble. And a case, wherein the foam sensor unit of the auxiliary electrode surrounds the temperature sensor unit of the auxiliary electrode and is a case formed to be energized with the foam upon contact with the foam. A drum rotatably disposed in the tub; A main electrode mounted below the tub and having a temperature sensor unit for sensing a temperature of the wash water supplied into the tub, and a foam sensor unit connected to the temperature sensor unit and a connector; Mounted at a position higher than the main electrode, and connected to the temperature sensor unit for sensing the temperature of the wash water supplied into the tub, the temperature sensor unit and one connector, the foam between the foam sensor unit of the main electrode A plurality of auxiliary electrodes having a bubble sensor unit electrically connected to the bubble sensor unit of the main electrode when generated; And a controller for determining whether bubbles are generated according to a signal voltage difference generated between the bubble sensor unit of the main electrode and the bubble sensor unit of each auxiliary electrode. The plurality of auxiliary electrodes include a first auxiliary electrode mounted in a drying duct for discharging hot air into the drum, and a second auxiliary electrode mounted in an exhaust duct for exhausting air in the drum to the outside. Drum Washing Machine. The method of claim 2, The temperature sensor part of the main electrode and the temperature sensor part of the auxiliary electrodes each include two temperature electrode terminals. The bubble sensor part of the main electrode and the bubble sensor part of the auxiliary electrodes are each made of one bubble electrode terminal which can be energized with the bubble when in contact with the bubble. The temperature electrode terminal and the bubble electrode terminal of the main electrode are integrally connected by the connector of the main electrode, And a temperature electrode terminal and a bubble electrode terminal of each auxiliary electrode are integrally connected by a connector of the auxiliary electrode. The method of claim 2, The temperature sensor part of the main electrode and the temperature sensor part of the auxiliary electrodes each consist of two terminals, The foam sensor portion of the main electrode is a case formed to surround the temperature sensor portion of the main electrode and to be energized with the foam when in contact with the foam, The foam sensor unit of each auxiliary electrode surrounds the temperature sensor unit of the auxiliary electrode is a drum washing machine formed in the case that is in contact with the foam so as to be energized. The method of claim 1, The auxiliary electrode is formed on top of the tub and the washing machine mounted on the water supply port for supplying the wash water into the tub. The method of claim 1, The auxiliary electrode is formed on top of the tub and the drum washing machine mounted on the air hole to allow air to flow into the tub. The method of claim 1, The at least one auxiliary electrode is a plurality of auxiliary electrodes, The plurality of auxiliary electrodes are formed on one side of the tub to be mounted on a first auxiliary electrode mounted on a water supply port for supplying wash water into the tub, and on the other side of the tub to allow air to flow through the tub. A drum washing machine comprising a second auxiliary electrode mounted to a hole. The method of claim 1, The drum washing machine further includes a drying duct provided with a circulation fan and a drying heater to supply hot air into the drum, and a condensation duct for condensing air dried in the drum and guiding the drying duct to the drying duct. . The method of claim 8, The at least one auxiliary electrode is a plurality of auxiliary electrodes, The plurality of auxiliary electrodes includes a first auxiliary electrode mounted in the drying duct and a second auxiliary electrode mounted in the condensation duct. The method of claim 1, And a drying duct provided with a circulation fan and a drying heater to supply hot air into the drum, and an exhaust duct for discharging air dried in the drum to the outside. The method of claim 10, The at least one auxiliary electrode is a plurality of auxiliary electrodes, The plurality of auxiliary electrodes includes a first auxiliary electrode mounted in the drying duct and a second auxiliary electrode mounted in the exhaust duct.

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