KR100826206B1 - drum type washer - Google Patents

Abstract

The present invention relates to a drum washing machine, and to improve the washing and rinsing performance by allowing the washing water circulated by the washing water circulation device to be smoothly supplied into the drum.

To this end, the present invention, a cabinet in which the inner space is formed, a cabinet in which the inner space is formed, a tub installed in the inner space of the cabinet, the front end of which is directly fixed to the front surface of the cabinet, and rotates inside the tub A drum having an opening formed thereon, a driving unit for rotating the drum, a drum supporting unit for supporting the drum in a floating state and absorbing the vibration so that the vibration of the drum is not transmitted to the tub And a circulation unit for guiding a part of the wash water stored in the tub to the inside of the drum via the outside of the tub.

Drum washing machine, circulation pump, circulation hose, inlet pipe, guide, circulation device

Description

Drum Washing Machine {drum type washer}

1 is a cross-sectional view of main parts schematically showing the structure of a conventional drum washing machine.

Figure 2 is a cross-sectional view schematically showing the structure of the drum washing machine according to the present invention

3 is a schematic cross-sectional view seen from the front of the drum washing machine of FIG.

4 is an enlarged view of a portion A of FIG. 2;

Explanation of symbols on the main parts of the drawings

101: cabinet 120: tub

122: back spider 124, 125: first and second bearing housings

126: bearing 128: bracket

130: drum 131: drive shaft

132: drum spider 140: drive motor

141: stepper 142: rotor

150: damper 152: suspension spring

165: drain pump 166, 167: first and second drain hose

160: circulation pump 161, 162: first and second circulation hose

171: inlet pipe 172: guide

The present invention relates to a drum washing machine, and more particularly, to a drum washing machine having an improved device for circulating the washing water supplied to the drum washing machine.

In general, the drum washing machine is a device for washing the laundry by using the friction force of the rotating drum and the laundry by receiving the driving force of the driving unit in the state in which detergent, washing water and laundry are put into the drum, the laundry is less damage, the laundry is It doesn't get tangled up, and it's designed to give you a pounding and scrubbing wash effect.

As shown in FIG. 1, a conventional drum washing machine includes a tub 2 supported by a damper 7 and a spring 6 in a cabinet 1, and a cylindrical cylinder rotatably installed in the tub about a horizontal axis. Upper drum 3 and a drive motor 5 axially coupled with the drum.

The drive motor 5 is composed of a rotor (5b) and a stator (5a) is installed on the rear of the tub (2), the drum to transfer the driving force of the rotor (5b) directly to the drum (3) without a pulley or belt The drive shaft 4 which rotates together with the rotor is directly connected to the rotor.

The front of the cabinet 1 is provided with a door 8 at a predetermined position so as to correspond to the opening of the drum 3, and between the door and the drum is provided with a gasket 9 for maintaining a seal in the drum. The upper part of the (8) is provided with a control panel 10 for receiving a user's operation command and control the operation of the entire washing machine.

The rear side of the cabinet 1 is connected to the water supply means not shown is provided with a water supply valve 12 to supply hot water and cold water.

On the lower rear side of the cabinet 1, a drain pump 14 is installed in the middle of the drain hose 13 to forcibly drain the wash water drained from the tub 2 via the drain hose 13 to the outside. have.

In addition, the conventional drum washing machine is provided with a washing water circulation system for improving the washing and rinsing performance by circulating the washing water stored in the tub 2 by the pumping force of the pump.

The washing water circulator is installed at a lower side of the front part of the cabinet 1 to circulate the washing water, and is connected to the circulation pump 16 to circulate the washing water to the upper portion of the tub. It consists of a circulation hose 18 for supplying washing water to the inside of the drum (6). Here, one end of the circulation hose 18 is connected to the inlet pipe (9a) formed integrally with the upper portion of the gasket (9).

Therefore, the washing water stored in the tub 2 during washing and rinsing flows along the circulation hose 18 by the operation of the circulation pump 16 and is re-introduced into the drum 3 to improve washing and rinsing performance. will be.

In addition, when the washing water and the rinsing water are discharged, only the drain pump 14 operates while the operation of the circulation pump 16 is stopped so that the washing water in the tub 2 is discharged to the outside through the drain hose 13.

However, the conventional drum washing machine is a gasket in the washing or rinsing process because the inlet pipe 9a to which the circulation hose 18 of the washing water circulation device is connected is integrally formed in the gasket 9 made of rubber. (9) is severely shaken, so that the washing water supplied through the inlet pipe (9a) flows down through the glass (8a) of the door (8) without flowing smoothly into the drum (3) This happens often.

When the washing water flows down the door without being supplied into the drum as described above, the circulating washing water does not function to wet the laundry, and thus, the washing and rinsing performance due to the bulking will not be expected. .

In particular, in order to reduce the size of the overall washing machine, the drum washing machine having the front of the tub fixed to the front of the cabinet has no structure such as a gasket for sealingly connecting the front end of the tub and the cabinet. There is a difficult problem.

The present invention is to solve the above problems, an object of the present invention to provide a drum washing machine that can improve the washing and rinsing performance by allowing the washing water circulated by the washing water circulation device to be smoothly supplied to the drum. It is.

Another object of the present invention is to provide a drum washing machine capable of reducing the amount of washing water used.

In order to achieve the above object, the present invention, a cabinet in which the inner space is formed, a cabinet in which the inner space is formed, the tub is installed in the inner space of the cabinet, the front end is fixed directly to the front surface of the cabinet, A drum rotatably installed inside the tub and having an opening formed in the front thereof, a driving unit for rotating the drum, supporting the drum in a floating state, and preventing the vibration of the drum from being transmitted to the tub It provides a drum washing machine including a drum support unit for absorbing and a circulation unit for guiding a portion of the wash water stored in the tub to the inside of the drum via the tub outside.

The drive unit includes a drive shaft connected to the rear of the drum, a drum spider provided to fix an inner end of the drive shaft to a rear surface of the drum, and a drive motor to provide rotational force to the drive shaft. Can be.

The driving motor may include a stator, a center of which is fixedly coupled to the driving shaft, and a rotor rotating outside of the stator.

On the other hand, the drum support unit, the back shaft of the tub is installed so that the drive shaft penetrates, the outer peripheral portion is connected to the inner peripheral portion of the rear end of the tub to maintain the airtight, and fixed to the back spider And at least one bearing rotatably supporting the drive shaft, and a bracket connected to the center portion of the lower end of the bearing housing part and extending toward the front of the tub. .

In addition, the drum support unit is provided on both sides of the lower end of the bearing housing portion, the suspension spring for supporting the rear portion of the drum in the suspended state inside the tub, coupled with the front end of the bracket, the vibration of the drum It may further include a damper for absorbing, and a gasket provided to keep the outer periphery of the backspider and the inner periphery of the rear end of the tub in a hermetic manner.

The circulation unit may include a circulation pump for pumping a part of the wash water, a circulation hose for forming a circulation flow path between the circulation pump and the tub, and a front end of the tub and connected to one end of the circulation hose. It may include an inlet pipe leading the wash water guided through the circulation hose into the tub.

The inlet pipe may be formed integrally with the tub, or may be manufactured separately from the tub, and may be fixed to the front end of the tub by a fastening means, and may be formed at a position spaced from an upper end of the tub at an angle.

On the other hand, the drum washing machine according to the present invention may further include a guide for guiding the washing water introduced through the inlet pipe into the drum, the guide is a front opening of the drum at the front end of the tub in which the inlet pipe is located It is preferably formed to extend downwardly inclined toward. In addition, the guide may be formed integrally with the tub, or may be manufactured separately from the tub and fixed to the front end of the tub by a fastening means.

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

2 and 3 show the configuration of an embodiment of a drum washing machine according to the present invention, the drum washing machine of the present invention is formed in the cabinet 101 with an opening for loading laundry in the front and the inside of the cabinet 101 The cylindrical drum 130 is rotatably installed and has an opening in the front, and is fixed in the cabinet 101 to surround the outside of the drum 130 and has a cylindrical tub 120 having an opening in the front surface. It is composed.

The cabinet 101 has a rectangular parallelepiped shape in which an accommodation space is formed, and an opening is formed in the front plate 120a to allow laundry to enter and exit. The door 110 and the door glass 111 are rotatably coupled to open and close the opening at one side of the opening.

A plurality of bosses 121 are formed on the front surface of the tub 120 along the circumferential direction, and the bolts 105 inserted from the outside of the cabinet 101 are fastened to the bosses 121 so that the front of the tub 120 is fastened. The sides are fixed to the front plate 102 of the cabinet 101. As such, since the tub 120 is fixed to the cabinet 101, when the vibration of the drum 130 is directly transmitted to the tub 120, the reliability of the system due to the vibration is problematic. Therefore, there is a need for a structure capable of absorbing the vibration of the drum 130 to block transmission to the tub 120. Hereinafter, the structure of the drum support unit which serves to absorb the vibration of the drum 130 will be described.

A back spider 122 having a diameter slightly smaller than the outer diameter of the tub 120 is formed at the rear end portion of the tub 120. In addition, between the rear end of the tub 120 and the back spider 122, a gasket 127 for hermetically blocking the inside and outside of the tub 120 is coupled. A bearing housing part is provided at the rear of the back spider 122. The bearing housing part is formed by combining the first bearing housing 124 and the second bearing housing 125, which are manufactured as individual pieces. In the interior of the first and second bearing housings 124 and 125, a bearing 126 rotatably supporting the drive shaft 131 coupled to the rear of the drum 130 is installed.

On the other hand, two suspension springs 152 for supporting the rear portion of the drum 130 in a floating state on both sides of the lower end of the first bearing housing 122 is mounted. In addition, a substantially 'L' shaped bracket 128 is formed to extend forward in the center of the lower end of the first bearing housing 124, the damper for absorbing the vibration of the drum 130 in the front end of the bracket 128 150 is combined. Here, the damper 150 is formed to be inclined while the rear end is fixed to the rear of the cabinet, so as to effectively absorb not only the vertical vibration of the drum 130 but also the front and rear vibration.

The suspension spring 152 and the damper 150 is a cabinet 101 of a combination of a drum 130, a drum spider 132, a back spider 122 and a drive motor 140 are integrally movable to each other. It is preferable to configure the center of gravity for the front and rear direction of the.

Hereinafter, a driving unit of the drum washing machine according to the present invention will be described.

The drum spider 132 is fixed to the rear surface of the drum 130, the inner end of the drive shaft 131 is fixed. The drive shaft 131 of the drum 130 passes through the above-described back spider 122 and the first and second bearing housings 124 and 125, and an outer end thereof is connected to the driving motor 140 to rotate.

Here, the drive motor 140 is coupled to the stator 141 is fixed to the outer surface of the second bearing housing 125, the center is fixed to the drive shaft 131 and rotated outside the stator 141. Rotor 142.

The front end of the drum 130 is provided with a balancer 133 so that the rotation of the drum 130 is made constant. In addition, a plurality of lifters 134 are formed on the inner circumferential surface of the drum 130 to lift and drop the laundry during rotation of the drum 130 at regular intervals.

On the other hand, a drain pump 165 is installed below the rear portion of the cabinet 101. The drain pump 165 is connected to the lower portion of the tub 120 via the first drain hose 166, which is capable of expansion and contraction of the inlet portion. In addition, the outlet portion of the drain pump 165 is connected to a second flexible drain hose 167 for discharging the wash water to the outside.

Hereinafter, a circulation unit of a drum washing machine according to the present invention will be described.

The circulation pump 160 for circulating the wash water supplied to the tub 120 into the tub 120 via the outside of the tub 120 is installed in the lower portion of the front portion of the cabinet 101. The inlet portion of the circulation pump 160 is connected to the lower portion of the tub 120 via the first flexible circulation hose 161, and the outlet portion of the circulation pump 160 also includes the second flexible circulation hose 162. It is connected with the upper end of the front end of the tub 120.

As shown in FIG. 4, an inlet pipe 171 is formed at a front end of the tub 120 to which one end of the second circulation hose 162 is connected. Here, the inlet pipe 171 is preferably formed at a position spaced about 30 degrees from the top end of the tub 120.

In addition, a guide 172 is formed directly below the inflow pipe 171 to guide the washing water introduced through the inflow pipe 171 to the inside of the drum 130. The inlet pipe 171 and the guide 172 may be formed integrally with the tub 120, but is manufactured separately from the tub 120, using an adhesive or screw in the front end of the tub 120 It may be fastened or fixed by welding.

The guide 172 is preferably formed to extend toward the opening of the drum 130 while inclining downward from the front end of the tub 120.

The drum washing machine of the present invention configured as described above operates as follows.

When the user inserts laundry into the drum 130 and then applies power to operate the drum washing machine, the washing water is supplied into the tub 120 through a separate water supply device (not shown) provided in the cabinet 101.

When the water supply is completed, a signal is applied to the driving motor 140 so that the rotor 142 rotates along the outer circumference of the stator 141, and thus the drum 130 rotates to perform washing. At this time, while the circulation pump 160 operates periodically, some of the washing water in the tub 120 is circulated through the first circulation hose 161 and the second circulation hose 162.

The wash water re-supplied to the tub 120 through the second circulation hose 162 is introduced into the tub 120 through the inlet pipe 171 of the front end of the tub 120, and then the drum by the guide 172. It is guided to the inside 130 to impact the laundry inside the drum 130 and to function to sufficiently wet the laundry with the detergent dissolved in the laundry.

During the washing and rinsing stroke or when the washing and rinsing stroke is completed and the waste water is to be drained to the outside, the drain pump 165 is operated while the circulation pump 160 is stopped to operate the first and second drainage water. The wash water in the tub 120 is discharged to the outside through the hoses 166 and 167.

As described above, according to the present invention, the washing water re-supplied to the inside of the tub through the circulation pump does not flow to the door or scattered, and is smoothly guided into the drum through the front end of the tub, so that the laundry is sufficiently filled. Therefore, it is possible to improve the washing and rinsing performance.

In particular, when the front surface of the tub is attached to the front of the cabinet of the drum washing machine, the circulation hose connected to the circulation pump can be easily connected to the inlet pipe of the tub.

Claims (16)

A cabinet in which an internal space is formed; A tub installed in an inner space of the cabinet, the front end of which is fixed to a front surface of the cabinet; A drum rotatably installed inside the tub and having an opening formed at the front thereof; A driving unit having a driving shaft connected to the rear of the drum and rotating the drum; The back shaft of the tub is installed so that the drive shaft penetrates the outer periphery has a back spider connected to maintain the airtight with the inner periphery of the rear end of the tub, supporting the drum in a floating state and the vibration of the drum A drum support unit for absorbing the vibration so as not to be transmitted to the tub; And And a circulation unit for guiding a portion of the wash water stored in the tub to the inside of the drum via an outside of the tub. The method of claim 1, The drum support unit, And a bearing housing part fixed to the back spider and having at least one bearing rotatably supporting the drive shaft. The method of claim 2, The drum support unit, And a bracket connected to the center portion of the lower end of the bearing housing and extending toward the front of the tub. The method of claim 3, wherein The drum support unit, The drum washing machine is provided on both sides of the lower end of the bearing housing part, and further includes a suspension spring for supporting the rear portion of the drum in a floating state inside the tub. The method of claim 4, wherein The drum support unit, The drum washing machine coupled to the front end of the bracket, further comprising a damper for absorbing the vibration of the drum. The method of claim 5, wherein The drum support unit, The drum washing machine further comprises a gasket provided to connect the outer circumferential portion of the back spider and the inner circumferential portion of the rear end of the tub to maintain airtightness. The method according to any one of claims 1 to 6, The drive unit, A drum spider provided on the rear surface of the drum to fix an inner end of the drive shaft; Drum washing machine further comprising a drive motor for providing a rotational force to the drive shaft. The method of claim 7, wherein The drive motor, With the stator, A drum washing machine, the center of which is fixedly coupled to the drive shaft and comprises a rotor that rotates outside the stator. The method according to any one of claims 1 to 6, The circulation unit, A circulation pump for pumping a part of the washing water; A circulation hose for forming a circulation passage between the circulation pump and the tub, The drum washing machine is installed in the front end of the tub, and connected to one end of the circulation hose, comprising an inlet pipe for guiding the washing water guided through the circulation hose into the tub. The method of claim 9, The inlet pipe is a drum washing machine, characterized in that formed integrally with the tub. The method of claim 9, The inlet pipe is made of a tub and the individual drum washing machine, characterized in that fixed to the front end of the tub by a fastening means. The method of claim 9, The inlet pipe is a drum washing machine, characterized in that formed at a position spaced apart from the top of the tub by a predetermined angle. The method of claim 9, And a guide for guiding the washing water introduced through the inflow pipe into the drum. The method of claim 13, The guide is a drum washing machine, characterized in that formed extending inclined downward toward the front opening of the drum at the front end of the tub in which the inlet pipe is located. The method of claim 13, The guide is a drum washing machine, characterized in that formed integrally with the tub. The method of claim 13, The guide is a drum washing machine, characterized in that the tub and the individual body is fixed to the front end of the tub by a fastening means.

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