KR19990039403U - Foam and steam backflow prevention device of drum washing machine - Google Patents

Abstract

The present invention relates to a drum washing machine capable of boil-off washing, and in particular, since foam and steam do not flow back to the water supply bellows during high temperature washing and drying, there is no fear of corrosion of mechanical parts due to water leakage and burns caused by hot handles. The present invention relates to a foam and steam backflow prevention device of a drum washing machine, which can circulate air in order to facilitate a drying function.

Bimetal, a temperature sensing means that deforms largely in proportion to the change of temperature, and joins two kinds of metal plates with different thermal expansion rates, and a backflow prevention motor connected to the bimetal and operated according to the deformation of the bimetal, It is composed of a propeller shaft that is connected and rotated, a bevel gear connected to the propeller shaft and changing the direction of the rotational power by 90 degrees, and a propeller connected to the bevel gear and rotated by receiving the rotational power.

Description

Foam and steam backflow prevention device of drum washing machine

The present invention relates to a drum washing machine capable of boil washing, and more particularly, to a foam and steam backflow preventing device of a drum washing machine capable of preventing backflow of hot foam and steam from the drum during boiling washing and high temperature drying.

The conventional drum washing machine is a drum (11) in which the laundry clothes (1) are washed while being rotated while the case (10), the laundry clothes (1), and water are supplied, as shown in FIG. And a sealed tube (12) surrounding the drum (11), a gasket (13) for sealing the tube (12), and laundry clothing (1) for the drum (11). A door 14 installed at the front of the case 10 to supply and withdraw into the inside, an electric motor 15 for supplying power to rotate the drum 11, and a connection to the electric motor 15. And a belt 16 for transmitting power, a pulley 17 which is connected to the belt 16 and rotates to transmit the rotational power to the drum 11, and the pulley 17 and the drum 11. Is connected to the drum shaft 18 for rotating the drum 11 receives the rotational power of the pulley 17, and the upper part of the case 10 And a water supply bellows 19 for supplying water to the drum 11, and a detergent supply unit 20 having a detergent inlet 20a formed so that detergent is supplied and stored in the water supply bellows 19. A top cover 21 covering the upper part of the case 10, a water supply port 22 to which water is supplied from the outside, and a water supply port 22 connected to the water supply port 22 to supply water from the water supply port 22. A water supply valve 23 for controlling, a water supply pipe 24 through which water supplied to the water supply port 22 is moved to the water supply bellows 19, and a front panel installed at the front of the detergent supply unit 20 ( 25) and a handle 26 installed on the front panel 25 to open and close the front panel 25 to supply detergent to the detergent supply unit 20.

Referring to the operation of the conventional drum washing machine configured as described above in detail as follows.

First, the user opens the door 14 and supplies the laundry garment 1 to be washed into the drum 11.

Determining a washing course suitable for the washing clothes (1), the detergent 26 is put into the detergent supply unit (20) by pulling the handle (26) the amount of detergent suitable for the washing clothes (1).

When the detergent is supplied to the detergent supply unit 20 and the preparation for washing is completed, the user inputs a washing start signal.

When the washing start signal is input, the water supply valve 23 is opened, water is supplied from the water supply port 22, and is moved to the water supply bellows 19 through the water supply moving tube 24, and the water supply bellows 19 Is supplied into the drum (11). At this time, the detergent supply unit 20 is mixed with the supplied water while the detergent is supplied to the water supply bellows (19) is supplied into the drum (11).

When water suitable for the amount of the laundry garment 1 is supplied into the drum 11, the electric motor 15 is operated and the drum 11 is rotated accordingly to wash the laundry garment 1.

However, in the conventional drum washing machine, when hot washing and drying, the hot foam and steam 2 moves to the front panel 25 through the water supply bellows 19 so that the user grasps the handle 26. There is a risk of burns, there is a problem that the corrosion caused by high temperature heat, moisture and water droplets to shorten the life of the washing machine.

The present invention is devised to solve the above problems of the prior art, by blocking the leakage of foam and steam in the drum during high temperature washing and drying to eliminate the damage caused by leakage and circulate the air inside more smoothly drying function The purpose is to provide a foam and vapor backflow prevention device of the drum washing machine.

1 is a block diagram of a drum washing machine according to the prior art

2a is a block diagram of a drum washing machine according to the present invention

FIG. 2B is a detailed plan view of a portion A shown in FIG. 2A

FIG. 2C is a front detail view of a portion A shown in FIG. 2A

<Explanation of symbols on main parts of the drawings>

61: case 62: drum

63: tube 64: gasket

65 door 66 electric motor

67: belt 68: pulley

69: drum shaft 70: water supply bellows

71: detergent supply unit 71a: detergent inlet

72: top cover 73: water inlet

74: water supply valve 75: water supply pipe

76: front panel 77: knob

80: bimetal 81: backflow prevention motor

82: propeller shaft 83: bevel gear

84 propeller

The present invention is installed on the drum to be washed clothes and water is supplied, the water supply pipe for supplying water to the drum, the connection portion between the drum and the water supply pipe and the foam and steam flows back from the drum to the water supply pipe during high temperature washing A backflow preventing means for preventing the water, a driving part for supplying power to the backflow preventing means, a power transmission part for transmitting power from the driving part to the backflow preventing means, and a temperature sensing part for determining the operation of the driving part according to temperature. It is characterized by including.

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

The drum washing machine according to the present invention, as shown in FIG. 2, the drum 61 in which the laundry garment 51 is washed while being rotated in a state in which the casing 61 of the drum washing machine and the laundry garment 51 and water are supplied ( drum, a sealed tube (63) surrounding the drum (62), a gasket (64) (gasket) for sealing the tube (63), and laundry clothing (51) for the drum ( 62) a door 65 installed at the front of the case 61 so as to be fed into and taken out of the case; an electric motor 66 for supplying power to rotate the drum 62; and the electric motor 66. A belt 67 connected to the belt 67 to transmit power, a pulley 68 connected to the belt 67 to be rotated to transmit the rotational power to the drum 62, and the pulley 68 and the drum ( A drum shaft 69 which is connected to the drum 62 and receives the rotational power of the pulley 68 to rotate the drum 62; Detergent supply unit formed in the water supply bellows (70) for supplying water to the drum (62), detergent supply port 71a is formed so that detergent is supplied and stored in the supply bellows (70) ( 71, an upper plate cover 72 covering an upper portion of the case 61, a water supply port 73 to which water is supplied from the outside, and a water supply port 73 connected to the water supply port 73 from the water supply port 73. A water supply valve 74 for controlling the supply of water, a water supply pipe 75 through which water supplied to the water supply port 73 is moved to the bellows, and a front panel 76 installed on the front side of the detergent supply part 71. And a handle 77 installed on the front panel 76 to open and close the front panel 76 to supply detergent to the detergent supply unit 71.

In addition, the bimetal (80) and the bimetal (80), which is a temperature sensing means for bonding two kinds of metal plates having different thermal expansion coefficients and deforms in proportion to the change in temperature, and the bimetal (80). A reverse flow prevention motor (81) operated in accordance with the modification of the, the propeller shaft 82 is rotated in connection with the motor, and the bevel gear connected to the propeller shaft (82) to change the direction of the rotational power of 90 degrees ( Bevel gear (83), and is connected to the bevel gear (83) is composed of a propeller 84 that is rotated by receiving the rotational power.

Referring to the operation of the drum washing machine according to the present invention configured as described above in detail.

First, the user opens the door 65 and supplies the laundry garment 51 into the drum 62, and then supplies power to the washing machine.

When power is supplied to the washing machine, the user selects a washing method and a washing type according to the washing clothes 51, and pulls the handle 77 to the detergent supplying unit 71 to the amount of washing clothes 51. Supply detergent.

Here, when the user makes a selection, the water supply valve 74 is opened and water is supplied through the water supply port 73. The supplied water is moved along the water feed pipe 75 and is supplied into the drum 62 through the water feed bellows 70. At this time, the water supplied into the drum 62 through the water supply bellows 70 rotates the propeller 84 by the pressure, and evenly into the drum 62 by the rotation of the propeller 84. Scattered and supplied, the detergent is supplied from the detergent supply unit 71 is moved into the drum 62 through the water supply bellows 70 together with the water supplied.

When the amount of water supplied into the drum 62 is appropriately supplied to the amount of the laundry garment 51, the electric motor 66 starts to rotate. The rotational force of the electric motor 66 is transmitted to the drum 62 via the belt 67, the pulley 68, the drum shaft 69, and the drum 62 is rotated.

When the drum 62 is rotated, the laundry garment 51 is washed while the laundry garment 51 supplied into the drum 62 is mixed with water and a detergent.

In this case, when the washing type selected by the user is washing type that is washed with cold water, since the bimetal 80, which is a temperature sensor, is in a normal temperature state, deformation does not occur, and thus, the non-return motor 81 does not operate. The load is not applied to the propeller 84.

However, when the washing type selected by the user is a washing type of high temperature, the bimetal 80, which is a temperature sensor, is deformed by heat transfer of high temperature water that is moved through the feed water bellows 70, and the deformation causes the countercurrent. The prevention electric motor 81 is operated. Therefore, the rotational force is transmitted to the propeller 84 through the propeller shaft 82 and the bevel gear 83 so that the propeller 84 is rotated by the operation of the backflow prevention motor 81.

In the state in which the propeller 84 is rotated by the deformation of the bimetal 80, the laundry garment 51 is washed by the hot water in the drum 62. In this case, the drum 62 has a high temperature. Bubbles of water and vapor 52 attempt to flow back into the feedwater bellows 70 by convection of pressure and heat. However, the rotation of the propeller 84 causes the foam and vapor 52 to flow back to the feedwater bellows 70 back into the drum 62, and also the air, foam, and The steam 52 is better circulated to aid in washing.

In addition, when hot water is removed from the drum 62 and the laundry garment 51 is dried, heat is transferred to the bimetal 80 by circulation of hot air in the drum 62. As in the case of the washing by the high temperature water, the propeller 84 is rotated by the heat transfer to help circulate the air in the drum 62 to further dry the laundry garment 51.

As such, the drum washing machine according to the present invention does not flow back into the water supply bellows 70 during the high temperature washing and drying, and thus, the handle 77 due to the corrosion of the mechanical parts and the hot water due to the leakage due to leakage. There is no fear of burns, and the drying function can be more smoothly circulated by circulating air inside the drum 62.

Claims (4)

A drum to which clothes and water are supplied and washed, a water supply pipe for supplying water to the drum, and a connection portion between the drum and the water supply pipe, which prevents bubbles and steam from flowing back from the drum to the water supply pipe during high temperature washing. And a back flow preventing means, a driving part for supplying power to the backflow preventing means, a power transmission part for transmitting power from the driving part to the backflow preventing means, and a temperature sensing part for determining the operation of the driving part according to temperature. Foam and steam backflow prevention device of a drum washing machine. The method of claim 1, The reverse flow prevention means of the mall is a foam and steam backflow prevention device of the drum washing machine, characterized in that the propeller is formed with a plurality of rotary wings. The method of claim 1, The temperature detecting unit is a foam and steam backflow prevention device of a drum washing machine, characterized in that the bimetal is formed by bonding two kinds of metal plates having different coefficients of thermal expansion to each other and greatly deforms according to the change in temperature. The method of claim 1, The power transmission unit foam and steam backflow prevention device of the drum washing machine, characterized in that it comprises a bevel gear for changing and transmitting the rotational force of the drive unit in a 90 degree direction.