WO2021251514A1

WO2021251514A1 - Detergent feeder for dishwasher

Info

Publication number: WO2021251514A1
Application number: PCT/KR2020/007479
Authority: WO
Inventors: 성이제
Original assignee: (주)수기솔루션
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-12-16

Abstract

The present invention relates to a detergent feeder for a dishwasher having a rotating body equipped with a push roller which press on a hose by rotating inside the hose so that detergent in the hose is discharged by pressing the hose connected in a U shape. Since the push roller and a support roller are arranged to be spaced apart at a predetermined interval in the circumferential direction of the rotating body, when the push roller presses the U-shaped connection part of the hose during rotation of the rotating body, the support roller spaced apart from the push roller directly presses on and straightens the bent portion of the connection part, thereby preventing the connection part from being bent.

Description

detergent dispenser for dishwasher

The present invention relates to a detergent feeder for dishwashers having a rotating body equipped with a push roller that rotates inside the hose to pressurize the hose connected in a 'U' shape and pressurize the hose so that detergent in the hose is discharged. The push roller and the support roller are arranged to be spaced apart by a predetermined distance in the circumferential direction, so that when the push roller presses the 'U'-shaped connection part of the hose during rotation of the rotating body to discharge detergent, the support roller spaced apart from the push roller is It relates to a detergent feeder for a dishwasher that can prevent bending of a connection part by directly pressing and straightening the bending part of the connection part.

In general, dishwashers are designed to enable washing of dishes more hygienically and efficiently, and mainly washing water and rinsing water contained in the lower tanks of the washing machine, respectively, are transferred through a supply pipe by a pump and rotated in the washing room. Washing water and rinsing water are sequentially high-pressure sprayed through the nozzles of the spray tube to wash dishes placed in the washing room.

Such a dishwasher supplies detergent (liquid detergent and/or rinse aid, etc.) contained in a separate container to a detergent tank through a detergent supply unit (pump), so that the detergent is sprayed during dish washing.

In this detergent feeder, rolling rollers are installed at both ends of a rotating body rotating by a motor, and the rollers continuously press the hose located in the rotation path of the rollers to suck the detergent in the container, pump it, and discharge it to the tank. .

As a related prior art, there is Korean Patent Registration No. 10-0654911.

Specifically, the registered patent discloses that the rotating shaft of the motor mounted on the rear of the case penetrates through the case and protrudes to the front, rolling rollers are mounted on both sides of the rotor fixed to the rotating shaft, and the upper part of the hose installed inside the case is formed in a semi-circle and is located at the rotation radius of the rolling roller to pump and supply detergent through the rotation of the rotor.

In this registered patent, the two rollers sequentially pass the 'U'-shaped connection part of the hose to perform a pumping action,

At this time, each roller must completely compress the contacted part with strong pressure as it passes through the connection part, so that the detergent can be suctioned and discharged.

However, as in the prior registered patent, when one roller passes the connection part with strong pressure or when the pump is in a stopped state, the part that is not in contact with the roller receives a force inward, resulting in bending of the connection part. There is a problem in that the hose is easily damaged as it is repeated for a long time.

Accordingly, the present invention has been devised to solve the above problems,

In the detergent feeder for dishwashers that pumps and supplies detergent using a push roller, press and spread the connection part with a support roller to prevent bending of the connection part of the hose by the push roller,

It is possible to prevent wear of parts and deterioration of mobility due to friction between the housing and the rotating body during operation.

By naturally draining water leaks in the housing, the risk of failure is reduced,

An object of the present invention is to provide a detergent supply for a dishwasher capable of repeatedly aligning and maintaining a connection part of a hose in a fixed position through a support roller.

In order to achieve the above object, the detergent supply for a dishwasher according to the present invention,

A housing having a 'U'-shaped first outer wall portion and a second outer wall portion connecting both ends of the first outer wall portion, the housing having an inlet side first mounting hole and an outlet side second mounting hole formed on both sides of the second outer wall portion, respectively;

a motor provided outside the rear case of the housing and having a drive shaft fitted into the mounting part;

a detergent supply hose having both ends fixed to the first and second mounting holes, respectively, and having a 'U'-shaped connection part supported inside the first outer wall part; and

A push roller that is mounted to rotate in one direction by the drive shaft in the mounting portion, each of which completely squeezes the connection part during rotation to discharge the detergent in the hose to the outlet, and the push roller and the push roller are spaced apart from each other. It characterized in that it includes; a rotating body having a support roller to prevent bending of the connecting portion by pressing the connecting portion during rotation.

And in the detergent supply for a dishwasher according to the present invention,

The rotating body includes a shaft hole into which the drive shaft is fitted, and a shaft groove having an inner diameter larger than the shaft hole along the periphery of the front end side of the shaft hole,

The housing includes a shaft protrusion protruding from the inner surface of the front case and inserted into the shaft groove,

The shaft projection has a conical opening groove whose inner diameter is gradually decreased from the inner end to the outside, characterized in that the frictional resistance between the shaft groove and the shaft projection is reduced when the rotating body rotates.

In addition, in the detergent supply for a dishwasher according to the present invention,

The rear case is characterized in that it includes a drain for discharging water leakage formed at the outermost side opposite to the second outer wall portion.

Further, in the detergent supply for a dishwasher according to the present invention,

The support roller is characterized in that it includes a rod portion for pressing the inner outer surface of the hose, and a pair of flange portions protruding outward from both ends of the rod portion to press the front and rear outer surfaces of the hose.

A detergent supply for a dishwasher according to the present invention,

When the push roller passes the hose connection part, the support roller presses and straightens the other part of the connection part to prevent the hose from being bent by the push roller and to prevent the hose from being damaged.

At the inner end of the shaft that functions as the axis of the rotating body, it has a conical opening groove whose inner diameter decreases toward the outside, thereby reducing the frictional resistance between the shaft groove and the shaft of the rotating body when the rotating body rotates, thereby reducing thermal wear and Increase the mobility of the rotating body,

Even if an unintentional internal leak or moisture occurs, detergent or moisture in the housing is naturally drained to the outside of the housing, thereby preventing the failure of the detergent supply and the spread of the failure,

It has the effect of increasing the durability by wrapping the front, back and inner outer surfaces of the hose through the support roller of the 'H' cross-section consisting of the rod part and the flange part on both sides, and aligning and maintaining the hose connection part in the correct position through the support roller.

1 is a combined perspective view of a detergent supply for a dishwasher according to the present invention;

2A and 2B are exploded perspective views of a detergent supply for a dishwasher according to the present invention;

3A and 3B are a perspective view and a cross-sectional view of a main part of a detergent supply for a dishwasher according to the present invention;

4 is a cross-sectional view of a detergent supply for a dishwasher according to the present invention.

*Explanation of symbols for main parts of the drawing*

10: housing 11: front case

12: rear case 13: mounting part

14, 15: mounting hole 16: shaft

17: drain part

20: motor 21: drive shaft

30: hose 31: connection part

32: inlet 33: outlet

40: rotating body 41: shaft plate

42: rib 43: push roller

44: support roller

Since the present invention can have various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference sign, particularly the number of the tens and one digit, or the reference numerals having the same tens, one, and alphabet, indicates a member having the same or similar function, and, unless otherwise specified, each The member indicated by the reference sign may be regarded as a member conforming to these standards.

In addition, in each drawing, components are expressed in exaggeratedly large (or thick), small (or thin) or simplified in size or thickness in consideration of convenience of understanding, but the protection scope of the present invention is limited by this. it shouldn't be

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as comprises or consists of are intended to designate the existence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification are only to be referred to to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

For convenience in describing the detergent supply for a dishwasher according to the present invention, if an approximate direction standard that is not strict is specified with reference to FIG. 1, the direction in which gravity acts is set to the lower side and the vertical and horizontal directions are determined as they are, and the other In the detailed description and claims of the invention related to the drawings, unless otherwise specified, directions are specified and described according to this standard.

Hereinafter, a detergent supply for a dishwasher according to the present invention will be described with reference to the accompanying drawings.

1 to 4 , the detergent supply for a dishwasher according to the present invention includes a motor ( 20), a detergent supply hose 30, and a rotating body 40 for pumping and discharging detergent in the hose 30.

In the housing 10, a front case 11 and a rear case 12 are coupled to each other, and in the

cases

11 and 12, a 'U'-shaped first outer wall portion 13a and the first outer wall portion are included. A mounting portion 13 formed of a second outer wall portion 13b connecting both ends of 13a, an entrance-side first mounting hole 14 and an outlet-side second mounting hole formed on both sides of the second outer wall portion 13b, respectively (15) is provided.

A shaft coupling hole 12a for protruding into the mounting part 13 for the driving shaft 21 of the motor 20 is provided in the center of the rear case 12 .

The motor 20 is provided on the outside of the rear case 12 of the housing 10 and includes a driving shaft 21 fitted into the mounting part 13 .

The driving shaft 21 has an angled form on one side for accompanying rotation with the rotating body 40 through the engagement of the rotating body 40 .

The detergent supply hose 30 has both ends fixed to the first mounting hole 14 and the second mounting hole 15, respectively, and a 'U'-shaped connection part 31 supported inside the first outer wall part 13a. has

That is, the hose 30 itself is bent in a 'U' shape so that the connection part 31 is supported and mounted inside the first outer wall part 13a of the mounting part 13, and is mounted on the inlet side first mounting hole 14. One end of the fixed hose 30 is connected to the detergent container and functions as the inlet 32 , and the other end of the hose 30 fixed to the outlet-side second mounting hole 15 is connected to the detergent tank (or detergent injection pipe) and It is connected to function as the outlet (33).

The hose 30 is a soft hose made of silicone, and when the outer surface of the hose 30 is pressed, its shape is deformed and the detergent in the hose 30 is pushed in one direction to be used as a flow path through which the detergent is discharged.

In addition, in order to fix both ends of the hose 30, the inner peripheral surface of the first and second mounting holes 15 of the housing 10 is a pressing protrusion (reference numeral not shown) for pressing and fixing the outer surface of the hose 30. is formed to protrude.

The rotating body 40 is mounted to rotate by the driving shaft 21 in the mounting part 13, and is arranged to be spaced apart from each other by a predetermined interval in the circumferential direction of the rim part to press and press the connection part 31, respectively, during rotation. A push roller 43 and a support roller 44 are provided.

Specifically, the push roller 43 completely squeezes the contacted part when passing the connection part 31 during rotation of the rotating body 40 to discharge the detergent in the hose to the outlet 33,

The support roller 44 is arranged to be spaced apart from the push roller 43 by a predetermined interval to press the inner and outer surface of the connecting portion 31 during rotation of the rotating body 40 to straighten the connecting portion 31 to prevent bending of the connecting portion 31 .

At this time, the push roller 43 has a length corresponding to the diameter of the hose 30 with a radius from the rotation shaft to the outer surface of the push roller 43 when the push roller 43 passes the connection part 31 of the hose 30 . The hose 30 is completely pressed with a strong force by the

The support roller 44 has an outer diameter smaller than the diameter of the hose 30 (that is, an outer diameter smaller than the push roller 43), so that when the push roller 43 passes the connection part 31 of the hose 30 As a reaction to this, while supporting the outer surface of the connecting portion 31 bent inward with the support roller 44, press the bent portion to spread it to its original shape, thereby preventing the shape of the connecting portion 31 from being completely bent and deformed.

Specifically, the rotating body 40 includes a pair of circular shaft plates 41 having a size corresponding to the inner diameter of the first outer wall portion 13a, and a pillar portion 41A connecting the centers of both shaft plates 41. As an 'H' type conjugate,

It includes a shaft hole 41a through which the driving shaft 21 is fitted through the pillar portion 41A, and a shaft groove 41b having an inner diameter larger than that of the shaft hole 41a along the periphery of the front end side of the shaft hole 41a. .

A plurality of ribs 42 arranged radially outward are connected to the outer circumferential surface of the pillar portion 41A to prevent deformation through securing support force between both shaft plates 41 .

At this time, the rib 42 is formed so that the outer end has a length that can be contacted with the inner outer surface of the connection part 31 of the hose 30 , and assists the function of preventing the bending of the support roller 44 .

The shaft hole 41a has the same shape as the drive shaft 21 , and the drive shaft 21 is fitted to the shaft hole 41a so that the rotating body 40 rotates together with the drive shaft 21 when the motor 20 is operated. do.

At this time, the drive shaft 21 has a length corresponding to the front and rear lengths of the shaft hole 41a, so that when the drive shaft 21 is inserted into the shaft hole 41a, the end of the drive shaft 21 does not protrude outside the shaft groove 41b. do not

The rotating body 40 is provided with one or more push rollers 43 and support rollers 44 in the circumferential direction, respectively. At this time, there is no limit to the number of the push rollers 43 and the support rollers 44, and the like, in the present specification. In the drawings, an embodiment in which two push rollers 43 and a support roller 44 are arranged in a '十' shape to cross each other is representatively shown.

The push roller 43 has a cylindrical drum shape, and the rotation shaft passes through and is axially installed on both shaft plates 41, respectively, and when the rotating body 40 rotates, the push roller 43 moves to the hose 30 (more strictly When in contact with the connection part 31), the push roller 43 presses the outer surface of the hose 30 while rotating itself in the opposite direction to the rotation of the rotating body 40.

The support roller 44 is a rod portion 44A formed to press the inner outer surface of the hose 30, and is connected to protrude from both ends of the rod portion 44A to the outside, so that the front and rear outer surfaces of the hose 30 are formed. Including a pair of

flange portions

44B and 44C formed to surround, the cross section has an 'H' shape.

The support roller 44 has a rod portion 44A and both

side flange portions

44B, 44C during rotation of the rotating body 40 on the inner and front and rear outer surfaces of the hose 30, more precisely, the connection portion 31. While they are all in contact, the push roller 43 straightens the pasted portion to prevent the connecting portion from being bent, so that the unbent connecting portion is always aligned and maintained in the correct position.

In addition, the rotating body 40 is mounted to be spaced apart from the inner surface of the front case 11 of the housing 10 by a predetermined distance so that it can advance in the longitudinal direction of the driving shaft 21 by centrifugal force during rotation.

That is, the rotating body 40 of the present invention does not have a separate fixed key or nut coupling with the end of the driving shaft 21 , so when the rotating body 40 rotates, a centrifugal force acts on the front end of the driving shaft 21 . When the pressure is applied to the end portion, a gap 11S necessary for the advancement of the rotating body 40 by this centrifugal force is formed between the front case 11 and the front end shaft plate 41 of the rotating body 40, so that the centrifugal force relieve the pressure caused by

On the other hand, since both shaft plates 41 of the rotating body 40 can be rotated more stably when both shaft plates 41 are shafted, the housing 10 protrudes from the inner surface of the front case 11 and is inserted into the shaft groove 41b. (16) is further included.

These shaft projections 16 have the same outer diameter as the inner diameter of the shaft groove 41b to prevent shaking when the rotating body 40 rotates.

In addition, the shaft projection 16 has a conical opening groove 16a whose inner diameter is gradually decreased from the inner end to the outside, and when the rotating body 40 rotates, the shaft groove 41b and the shaft projection 16 Frictional resistance is reduced.

That is, when the rotating body 40 rotates while the inner end of the shaft protrusion 16 is in contact with the bottom surface of the shaft groove 41b, frictional resistance between the shaft projection 16 and the shaft groove 41b is generated. Therefore, not only damage to parts due to thermal wear occurs, but also a decrease in mobility of the rotating body 40 due to an increase in frictional force may occur.

By reducing the contact area of the shaft protrusion 16 contacting the shaft groove 41b through the conical opening groove 16a, the above-described problem is prevented.

On the other hand, due to the characteristics of the detergent supply for the dishwasher, leakage of detergent in the hose 30 or moisture in the housing 10 may cause water leakage in the housing 10, and the rear case 12 is The second outer wall portion 13b includes a drain portion 17 for discharging the water leak formed in the outermost side opposite to the portion (13b).

The drain portion 17 includes one or more drain holes 17a formed from the inside of the first outer wall portion 13a through the rear case 12, and formed on the same line as the drain holes 17a on the upper and lower sides of the rear case ( 12) is composed of a semi-circular drain groove (17b) formed by penetrating the rim up and down.

The drain unit 17 secures a space between the rear case 12 and the parts of the dishwasher through the semi-circular drain groove 17b when the rear case 12 is installed in close contact with the outer surface of the parts of the dishwasher. (13) The water leakage (detergent, moisture, etc.) generated in (13) passes through the drain hole 17a and is naturally discharged into the drain groove 17b.

Hereinafter, the operation of the detergent supply for a dishwasher having the above configuration will be described.

First, when the rotating body 40 is rotated in one direction (clockwise in the drawing) by the motor 20, the push roller 43 disposed on the inlet 32 side of the hose 30 moves to the first outer wall portion 13a. The hose 30 is completely compressed while rotating along the , transporting the detergent in the hose 30 to the outlet 33 and sucking the detergent through the inlet 32 at the same time.

When the rotation of the rotating body 40 is repeated in this way, the pair of push rollers 43 rotate while pressing the connection part 31 of the hose 30 sequentially, thereby supplying the detergent by pumping.

At this time, in the conventional detergent feeder, only one push roller 43 passes through the connection part 31. As a reaction to the pressure pressed by the push roller 43, the part through which the push roller 43 has passed exerts pressure inside. As it is received, it is bent, and the flowability of the detergent is reduced due to a decrease in the diameter of the flow path. In particular, when used for a long time, the connection part 31 is repeatedly bent, so that the hose 30 easily bursts.

Accordingly, in the present invention, after the push roller 43 passes the connection part 31, the rod part 44A of the support roller 44 passes while pressing the connection part 31, and the other part of the connection part 31 is inside. While supporting so as not to be bent, the bent part is pressed and spread to improve the flowability of the detergent and to prevent damage due to the bending of the hose 30 .

That is, since the outer diameter of the rod portion 44A is smaller than the outer diameter of the push roller 43, rather than directly pressurizing and discharging the detergent in the connection portion 31, the connection portion 31 is supported so as not to be bent inward while supporting the hose. In particular, as the rod portion 44A does not simply support the connection portion 31 and evenly presses the inner outer surface of the connection portion 31 to the outside (that is, in the direction of the first outer wall portion 13a), the connection portion 31 ) to maintain the original shape by spreading the bent portion in the direction of the inner groove of the support roller, thereby improving the flow of detergent in the hose 30 and preventing the hose 30 from being damaged.

In particular, in the present invention, when the push rollers 43 pass the connection part 31 , the support roller 44 and the rib 42 press and support another part of the connection part 31 that is not pressed by the push roller 43 . , by ensuring that the connection part 31 is always maintained in a 'U' shape, it is possible to prevent malfunction of the rotating body 40 or damage to the hose 30 due to resistance caused by the bending of the connection part 31, so that the amount of detergent supplied can be safely maintained in quantitative terms.

On the other hand, in the present invention, as described above, when the clearance portion 11S is formed between the rotating body 40 and the front case 11 and the rotating body 40 rotates at a predetermined speed or more, the rotating body 40 rotates the drive shaft ( 21) while advancing toward the end of the centrifugal force, the pressure caused by centrifugal force is eliminated. In addition to reducing, there is an effect of increasing the mobility of the rotating body 40 .

Furthermore, in the present invention, since both

side flange portions

44B and 44C of the support roller 44 surround and support the front and rear outer surfaces of the connecting portion 31 together with the rod portion 44A, the front and rear positions of the rotating body 40 are changed. Even if this occurs, the connection part 31 is aligned and maintained at the same height as the rotating body 40 through the support roller 44, thereby improving the flowability of the detergent and further increasing the damage prevention effect of the hose 30. can

In the above description of the present invention, with reference to the accompanying drawings, the detergent supply for a dishwasher has been mainly described, but various modifications, changes and substitutions are possible by those skilled in the art, and such modifications, changes and substitutions are the protection of the present invention. should be construed as within the scope.

Claims

A housing having a 'U'-shaped first outer wall portion and a second outer wall portion connecting both ends of the first outer wall portion, the housing having an inlet side first mounting hole and an outlet side second mounting hole formed on both sides of the second outer wall portion, respectively;

a motor provided outside the rear case of the housing and having a drive shaft fitted into the mounting part;

a detergent supply hose having both ends fixed to the first and second mounting holes, respectively, and having a 'U'-shaped connection part supported inside the first outer wall part; and

A push roller that is mounted to rotate in one direction by the drive shaft in the mounting portion, each of which completely squeezes the connection part during rotation to discharge the detergent in the hose to the outlet, and the push roller and the push roller are spaced apart from each other. Detergent feeder for dish washing machine comprising a; a rotating body having a support roller for preventing the connection part from being bent by pressing and unfolding the connection part during rotation.
The method of claim 1,

The rotating body includes a shaft hole into which the drive shaft is fitted, and a shaft groove having an inner diameter larger than the shaft hole along the periphery of the front end side of the shaft hole,

The housing includes a shaft protrusion protruding from the inner surface of the front case and inserted into the shaft groove,

The shaft protrusion has a conical opening groove whose inner diameter is gradually decreased from the inner end to the outside, and the frictional resistance between the bottom surface of the shaft groove and the shaft is reduced when the rotating body rotates. feeder.
The method of claim 1,

The rear case is a detergent supply for a dishwasher, characterized in that it includes a drain for discharging water leakage formed at the outermost side opposite to the second outer wall portion.
The method of claim 1,

The support roller is for a dishwasher, characterized in that it includes a rod portion for pressing the inner outer surface of the hose, and a pair of flange portions protruding outward from both ends of the rod portion to press the front and rear outer surfaces of the hose. detergent dispenser.