WO2022124726A1

WO2022124726A1 - Dishwasher

Info

Publication number: WO2022124726A1
Application number: PCT/KR2021/018346
Authority: WO
Inventors: 한신우; 윤상헌
Original assignee: 엘지전자 주식회사
Priority date: 2020-12-07
Filing date: 2021-12-06
Publication date: 2022-06-16
Also published as: KR20220080522A

Abstract

The present invention relates to a dishwasher, the dishwasher according to an embodiment of the present invention comprising: a washing tub in which an object to be washed is accommodated and washing water is sprayed; a sump which is arranged on the lower side of the washing tub and accommodates the washing water; a washing pump which is connected to the sump and squeezes out the washing water accommodated in the sump toward the washing tub; a spray nozzle which supplies the washing water squeezed out from the washing pump into the washing tub; and a heater which is arranged to be connected to each of the washing pump and the spray nozzle and has, formed therein, a heating space in which the washing water flows, an inlet through which the washing water flows into the heating space, and an outlet through which the washing water is discharged from the heating space, wherein the heater comprises: a first guide which is extended from the inlet toward the outlet; and a second guide which is extended from the outlet toward the inlet and is spaced apart from the first guide so that the flow stream of the washing water is adjusted through the guides to equalize the flow rate and the pressure distribution inside the heater and around the heater, and thus, there is an advantage of improving the efficiency of transferring heat to the washing water that flows in front of and behind the heater.

Description

dish washer

The present invention relates to a dishwasher, and more particularly, to a heater disposed in the dishwasher.

A dishwasher is a device that sprays washing water and steam to a washing target accommodated inside a cabinet to remove foreign substances and bacteria on the washing target.

A heater for turning the circulated washing water into hot water or steam is disposed inside the dishwasher, and a flow path through which the washing water flows is formed in the heater.

However, the conventional heater has a problem in that the washing water flowing into the heater through the inlet of the heater does not flow to the outlet of the heater and is stagnated in the heater, preventing smooth circulation of the washing water.

Korean Patent Application Laid-Open No. 10-2006-0129238 discloses a guide bulkhead that guides the flow path of fluid introduced into the heater, but the flow of fluid is guided by the guide bulkhead, while the inner space of the heater is separated by the guide bulkhead structure. As a result, there is a problem in that the pressure loss due to the pressure difference between the separated spaces occurs, thereby reducing the circulation efficiency of the washing water.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dishwasher with improved heating efficiency of washing water.

Another object of the present invention is to provide a dishwasher in which the flow of washing water is uniform.

Another object of the present invention is to provide a dishwasher having a heater in which pressure distribution is uniform.

Another object of the present invention is to provide a dishwasher having a compact structure.

Another object of the present invention is to provide a dishwasher with improved steam generation efficiency.

The problems of the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a dish washing machine according to an embodiment of the present invention includes: a washing tank in which a washing object is accommodated and washing water is sprayed; a sump disposed below the washing tank and receiving the washing water; a washing pump connected to the sump and extruding the washing water accommodated in the sump toward the washing water; a spray nozzle for supplying the washing water extruded from the washing pump into the washing tank; and a heating space through which the washing water flows, an inlet through which the washing water flows into the heating space, and an outlet through which the washing water exits from the heating space are respectively formed to be connected to the washing pump and the spray nozzle, respectively. Including a heater, it is possible to heat the washing water circulating through the heater.

The heater may include: a first guide extending from the inlet toward the outlet; and a second guide extending from the outlet toward the inlet and spaced apart from the first guide, wherein the washing water introduced into the heater through the inlet by the first guide and the second guide is guided toward the outlet and at the same time The pressure distribution in the heater can be uniformly formed.

The dishwasher may include: a heater inlet pipe connected to the heater to communicate with the inlet; and a heater discharge pipe connected to the heater so as to communicate with the outlet, and the heater inlet pipe and the heater discharge pipe may extend in a direction crossing each other.

The outer end of the first guide may form a continuous surface with the inner wall of the heater inlet pipe.

The outer end of the second guide may form a continuous surface with the inner wall of the heater discharge pipe.

An auxiliary guide connected to the first guide may be formed in the heater inlet pipe.

An inner end of the first guide and an inner end of the second guide may be disposed to face each other.

The first guide and the second guide may be formed to be symmetrical to each other.

The first guide and the second guide may be spaced apart from the lower surface of the heater upward.

The thickness of the first guide and the second guide may become narrower toward the lower side.

The first guide may include a first connection portion extending in a straight line from the inlet.

The second guide may include a second connection part extending in a straight line from the outlet.

The first guide may include: a first bent part inclined toward the outlet from the first connection part; and a first extension portion extending from the first bent portion toward the outlet.

The second guide may include a second bent portion inclined toward the inlet from the second connection portion; and a second extension portion extending from the second bent portion toward the inlet.

A distribution space through which the washing water flows may be formed between the first extension and the second extension.

A length of the first connection part may be longer than a length of the first extension part.

A length of the second connection part may be longer than a length of the second extension part.

A length ratio of the first connection part and the first extension part may be between 1.2 and 1.6.

The first bent portion may be formed so that a radius of curvature of one side is larger than a radius of curvature of the other side.

The first extension portion may be formed to be inclined with respect to an extension direction of the second connection portion.

An inclination angle of the first extension portion with respect to the second connection portion may be 45 degrees or less.

A distance between the inner end of the first guide and the inner end of the second guide may be shorter than lengths of the first connecting portion and the second connecting portion.

A distance between the inner end of the first guide and the inner end of the second guide may be longer than lengths of the first extension and the second extension.

The heater may have a first heating space and a second heating space in which the washing water flows.

The guide extending from the inlet through which the washing water is introduced toward the outlet through which the washing water is discharged may have an opening for communicating the first heating space and the second heating space.

The guide may include a third guide formed between the first guide and the second guide and having a height lower than that of the first guide and the second guide.

The guide may extend continuously from the inlet to the outlet.

The opening may be formed by being perforated in the guide.

The details of other embodiments are included in the detailed description and drawings.

According to the dishwasher of the present invention, there are one or more of the following effects.

First, there is an advantage in that heat transfer efficiency to the washing water flowing before and after the heater is improved by regulating the flow of washing water through the guide to equalize the flow rate and pressure distribution inside and near the heater.

Second, by guiding the washing water flowing into the inlet through the guide to flow to the outlet, there is also an advantage in that the washing water discharged through the outlet can be uniformly dispersed.

Third, there is an advantage in that the pressure distribution inside the heater can be uniformly maintained by allowing the steam to move through the space of the first guide and the second guide separated from each other.

Fourth, there is an advantage in that the structure of the heater can be compacted by realizing flow and pressure uniformity only with the first and second guide structures.

Fifth, there is an advantage that steam can be evenly generated in the entire area inside the heater through pressure distribution through the first guide and the second guide.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a dishwasher according to an embodiment of the present invention.

2 is a longitudinal cross-sectional view of a dishwasher according to an embodiment of the present invention.

3 is a cross-sectional view of a dishwasher according to an embodiment of the present invention.

4 is a perspective view of a heater according to an embodiment of the present invention.

5 is a top perspective view of a heater according to an embodiment of the present invention.

6 is a cross-sectional bottom perspective view of a heater according to an embodiment of the present invention.

7 is a longitudinal cross-sectional view of a heater according to an embodiment of the present invention.

FIG. 8 is an enlarged view of a part of the heater shown in FIG. 6 .

9 is a side perspective view of a guide according to an embodiment of the present invention.

10 is a side perspective view of a guide according to another embodiment of the present invention.

11 is a side perspective view of a guide according to another embodiment of the present invention.

12, 13, and 14 are views showing the flow uniformity effect of the guide according to an embodiment of the present invention.

15 is a view showing the pressure uniformity effect of the guide according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining the dishwasher according to embodiments of the present invention.

Referring to FIG. 1 , the overall appearance of the dishwasher 1 will be described first. 1 shows the overall appearance of the dishwasher 1 .

The dishwasher 1 includes a cabinet 10 having a washing tub 100 (refer to FIG. 2 ) for accommodating a washing object therein; and a door 20 disposed in front of the cabinet 10 .

The cabinet 10 may form the external shape of the dishwasher 1 and may have a square column shape. The front of the cabinet 10 may be opened, and the object to be washed may be introduced into the washing tub 100 through the opened portion of the cabinet 10 .

The door 20 may open or close the opened portion of the cabinet 10 . The door 20 may close the opened portion to seal the washing tub 100 , and may open the opened portion to allow the washing tub 100 to communicate with the outside of the cabinet 10 .

The door 20 may be connected to the cabinet 10 to be vertically movable. The door 20 includes a door body 21 forming an outer shape of the door 20; It may include a lower door 22 connected to the door body 21 so as to be movable up and down.

The door body 21 may be disposed to be movable up and down with respect to the cabinet 10 , and a guide member (not shown) for vertical motion of the door body 21 may be disposed therein.

The lower end 20b of the lower door 22 may be the lowermost end of the door 20, and the lower door 22 is moved vertically from the door body 21 to protrude downward from the lower surface of the cabinet 10. can

The dishwasher 1 may include a control panel 30 connected to the door 20 to be vertically movable. The control panel 30 may be a display that displays driving information of the dishwasher 1 and can select an administrative course of the dishwasher 1 . The control panel 30 may be connected to the door 20 so as to be vertically movable, and constitute the front surface of the door 20 . The upper end 20a of the control panel 30 may be the uppermost end of the door 20 , and the control panel 30 is vertically moved from the door body 21 to protrude upward from the upper surface of the cabinet 10 . can

Hereinafter, an internal structure of the washing tank 100 will be described with reference to FIG. 2 . FIG. 2 is a view showing the form in which the dishwasher 1 shown in FIG. 1 is cut in the vertical direction and viewed from the side.

In the washing tank 100, the washing object is accommodated, and washing water is sprayed. The washing tank 100 is disposed inside the cabinet 10 and forms a washing space 100S in which a washing object is accommodated.

A driving unit 200 for circulating the washing water is disposed under the washing tank 100 . The driving unit 200 may be disposed inside the cabinet 10 . The driving unit 200 forms a driving space 200S in which structures for circulation of washing water, which will be described later, are disposed.

In the washing tub 100, the upper rack 110 on which the object to be washed is seated, and the lower rack 120 on which the object to be washed is seated, which is disposed below the upper rack 110, may be arranged.

A plurality of

spray arms

150 , 160 , 170 for spraying washing water toward the washing target seated on the upper rack 110 and the lower rack 120 may be disposed inside the washing tank 100 .

A plurality of injection arms (150, 160, 170), and a lower injection arm 150 disposed on the lower side of the lower rack (120); An upper injection arm 160 disposed between the upper rack 110 and the lower rack 120 and; It may include a top spray arm 170 disposed on the upper side of the upper rack (110).

Each of the plurality of

injection arms

150 , 160 , 170 may receive washing water from a washing pump 220 (see FIG. 3 ), which will be described later. Inside the washing tank 100 , a first injection pipe 130 extending from the driving unit 200 and a second injection pipe 140 branching and extending from the first injection pipe 130 may be disposed.

The upper injection arm 160 may be connected to the second injection pipe 140 to receive washing water through the second injection pipe 140 . The top injection arm 170 may be connected to the first injection pipe 130 to receive washing water through the first injection pipe 130 .

The lower injection arm 150 may be connected to a distribution chamber 240 (see FIG. 3 ) to be described later, and receive washing water through the distribution chamber 240 .

Spray

nozzles

151 , 161 , and 171 for supplying washing water into the washing tub 100 are formed in each of the plurality of

jet arms

150 , 160 , and 170 .

A lower injection nozzle 151 protruding toward the lower rack 120 may be formed in the lower injection arm 150 , and a plurality of lower injection nozzles 151 are spaced apart from each other in the longitudinal direction of the lower injection arm 150 . can be formed. The lower spray arm 150 may be rotatably disposed in the washing tub 100 , and may be rotated using an upper and lower shaft as a rotation axis to spray washing water toward the lower portion of the lower rack 120 .

An upper injection nozzle 161 protruding toward the upper rack 110 may be formed in the upper injection arm 160 , and a plurality of upper injection nozzles 161 are spaced apart from each other in the longitudinal direction of the upper injection arm 160 . can be formed. The upper spray arm 160 may be rotatably connected to the washing tub 100 and rotated in the front-rear direction as a rotation axis to spray the washing water toward the lower part of the upper rack 110 and the upper part of the lower rack 120 . can

A top spray nozzle 171 protruding toward the inside of the washing tank 100 may be formed in the top spray arm 170 . The top spray arm 170 may be rotatably disposed on the upper side of the washing tub 100 , and may evenly spray the washing water toward the inside of the washing tub 100 .

Inside the washing tub 100 , a steam spray nozzle 180 for supplying steam into the washing tub 100 is disposed. The steam spray nozzle 180 may be disposed in front of the washing tank 100 adjacent to the door 20 . The steam injection nozzle 180 may be disposed to face the lower rack 120 .

The steam spray nozzle 180 may be connected to a heater 300 of a driving unit 200 to be described later, and receive steam generated from the heater 300 .

The washing space 100S may be defined as a space in which a washing object, a plurality of

spray arms

150 , 160 , 170 and the steam nozzle 180 are disposed, and the driving space 200S is the washing space 100S. It may be defined as a space for circulation of the washing water formed on the lower side.

The washing space 100S may mean an internal space of the washing tub 100 and may occupy a space equal to the first height H1.

The driving space 200S may mean an internal space of the driving unit 200 and may occupy a space equal to the second height H2.

The height of the cabinet 10 may be the sum of the first height H1 and the second height H2 , and may be the sum of the heights occupied by the washing space 100S and the driving space 200S.

The height H1 of the washing space 100S may be greater than the height H2 of the driving space 200S.

In order to reduce the height of the cabinet 10 while maintaining the height H1 of the washing space 100S, the height H2 of the driving space 200S may be lowered.

Hereinafter, an internal structure of the driving unit 200 will be described with reference to FIG. 3 . 3 is a view illustrating the internal structure of the driving space 200S as viewed from the upper side to the lower side.

The driving unit 200 includes a sump 210 disposed below the washing tub 100 and accommodating washing water; a washing pump 220 connected to the sump 210 and extruding the washing water accommodated in the sump 210 toward the washing tub 100 ; A heater 300 is connected to the washing pump 220 and the

injection nozzles

151 , 161 , and 171 , respectively, and a space 300s in which the washing water is heated is formed.

The driving unit 200 includes: a distribution chamber 240 connected to the

injection nozzles

151 , 161 , 171 and the heater 300 , and disposed to be spaced apart from the washing pump 220 ; a drain pump 250 spaced apart from the sump 210; and a water softener 260 connected to the sump 210 may be further included.

The sump 210 may provide a space in which the washing water sprayed to the washing object through the

jet nozzles

151 , 161 , and 171 is accommodated. In the sump 210 , a sump hole 210s communicating with the washing tub 100 may be formed, and the sump hole 210s may be opened in the vertical direction.

The sump 210 includes a filter 211 that filters out foreign substances contained in the washing water. The filter 211 may be disposed to surround the sump hole 210s. Washing water flowing into the sump 210 from the washing tank 100 may flow toward the washing pump 220 with foreign substances removed through the filter 211 .

The drain pump 250 may be connected to the sump 210 to discharge the washing water contained in the sump 210 to the outside of the cabinet 10 . The sump 210 may be connected to the drain pump 250 through the drain pipe 253 , and washing water and foreign substances accommodated in the sump 210 may be moved toward the drain pump 250 through the drain pipe 253 .

The drain pump 250 may be connected to the washing water discharge pipe 254 . The washing water discharge pipe 254 may communicate with the outside of the cabinet 10 . The drain pump 250 may suck in the washing water and foreign substances in the sump 210 through the drain pipe 253 , and may extrude it out of the cabinet 10 through the washing water discharge pipe 254 .

The water softener 260 may be connected to an external water source (not shown) and the sump 210 , respectively, and may supply washing water supplied from an external water source (not shown) to the sump 210 . The water softener 260 may remove inorganic substances contained in the washing water supplied from an external water source (not shown) and supply it to the sump 210 .

The sump 210 may be connected to the water softener 260 through the sump inlet pipe 213 . The sump 210 may receive the washing water in a state in which inorganic matter is removed through the sump inlet pipe 213 .

The washing pump 220 may be connected to the sump 210 through the pump inlet pipe 223 . The washing pump 220 may be connected to the heater 300 through the heater inlet pipe 301 .

The washing pump 220 may suck the washing water contained in the sump 210 through the pump inlet pipe 223 and extrude it to the heater 300 through the heater inlet pipe 301 .

The heater 300 may be connected to the washing pump 220 through the heater inlet pipe 301 , and may be connected to the distribution chamber 240 through the heater discharge pipe 302 .

The heater 300 may heat the washing water flowing in from the washing pump 220 to make it a hot water state. The washing water in the hot water state may be introduced into the distribution chamber 240 through the heater discharge pipe 302 .

The heater 300 may heat the washing water flowing in from the washing pump 220 to a steam state. The washing water in the steam state may be introduced into the steam nozzle 180 through the steam nozzle inlet pipe 183 . The washing water in the steam state introduced into the steam nozzle 180 may be sprayed toward the washing object accommodated in the washing tub 100 .

The distribution chamber 240 may be connected to the heater 300 through the heater discharge pipe 302 . The distribution chamber 240 may receive liquid washing water heated by the heater 300 .

The distribution chamber 240 may have a plurality of distribution holes 241 opened vertically. The distribution chamber 240 may supply washing water to the

spray arms

150 , 160 , 170 through the plurality of distribution holes 241 . Any one of the plurality of distribution holes 241 may communicate with the lower injection arm 150 . The other one of the plurality of distribution holes 241 may communicate with the upper injection arm 160 or the top injection arm 170 through the first injection pipe 130 . The washing water introduced into the distribution chamber 240 may flow to the lower injection arm 150 through one of the distribution holes 241, and the upper injection arm 160 or the other through the other distribution hole 241. It can flow to the top spray rock 170 .

The lower injection arm 150 may be directly inserted into the distribution hole 241 to be connected to the distribution chamber 240 , or may be connected to the distribution chamber 240 through a separate pipe inserted into the distribution hole 241 .

The upper injection arm 160 and the top injection arm 170 may be connected to the distribution chamber 240 through the first injection pipe 130 inserted into the distribution hole 241 .

The distribution chamber 240 may selectively supply the introduced washing water to the lower injection arm 150 , the upper injection arm 160 , and the top injection arm 170 . The distribution chamber 240 may supply washing water only through any one of the plurality of distribution holes 241 , or may supply the washing water through a plurality of the plurality of distribution holes 241 .

The sump 210 , the washing pump 220 , the heater 300 , the distribution chamber 240 , the drain pump 250 , and the water softener 260 may be horizontally spaced apart from each other. . The sump 210 , the washing pump 220 , the heater 300 , the distribution chamber 240 , the drain pump 250 , and the water softener 260 may be arranged such that at least some of them are located at the same height. can

A direction for describing the positional relationship of each structure within the driving unit 200 is defined. The direction in which the door 20 is disposed is the front, the direction opposite to the door 20 is the rear, the left when the door 20 is viewed from the front is the left, and the right when the door 20 is viewed from the front defined as right Front and rear or left and right as defined herein may be equally applied throughout the specification.

The water softener 260 may be disposed on the left side of the driving unit 200 . The sump inlet pipe 213 may extend in the left and right directions to connect the water softener 260 and the sump 210 . The sump 210 may be disposed on the right side of the water softener 260 .

The drain pump 250 may be disposed on the left side of the sump 210 . The drain pump 250 may be disposed behind the sump 210 . The drain pipe 253 may extend left and rearward from the sump 210 , and may connect the sump 210 and the drain pump 250 .

The washing water discharge pipe 254 may extend to the rear left from the drain pump 250 and may be connected to the cabinet 10 .

The pump inlet pipe 223 may extend in the left and right directions to connect the sump 210 and the washing pump 220 . The pump inlet pipe 223 may extend in a direction crossing the drain pipe 213 . The pump inlet pipe 223 may extend in a direction parallel to the sump inlet pipe 213 .

The heater inlet pipe 301 may extend in the front-rear direction to connect the washing pump 220 and the heater 300 . The heater inlet pipe 301 may extend in a direction crossing the pump inlet pipe 223 .

The heater discharge pipe 302 may extend in the left and right directions to connect the heater 300 and the distribution chamber 240 . The heater discharge pipe 302 may extend in a direction crossing the heater inlet pipe 301 . The heater discharge pipe 302 may extend in a direction parallel to the pump inlet pipe 223 . The heater discharge pipe 302 and the pump inlet pipe 223 may be disposed to face each other in the front and rear directions.

The sump 210 may be disposed to face the washing pump 220 in the left and right directions. The sump 210 may be disposed to face the distribution chamber 240 in the front-rear direction. The washing pump 220 may be disposed on the right side of the sump 210 . The distribution chamber 240 may be disposed behind the sump 210 .

The washing pump 220 may be disposed to face the heater 300 in the front-rear direction. The heater 300 may be disposed behind the washing pump 220 . The distribution chamber 240 may be disposed to face the heater 300 in the left and right directions. The distribution chamber 240 may be disposed to face the drain pump 250 in the left and right directions. The heater 300 may be disposed on the right side of the distribution chamber 240 . The drain pump 250 may be disposed on the left side of the distribution chamber 240 .

Due to the above-described structure, the flow path structure connecting the drain pipe 253 , the pump inlet pipe 223 , the heater inlet pipe 301 , and the heater discharge pipe 302 may be configured in a 'U' shape. Accordingly, the drain pump 250 , the sump 210 , the washing pump 220 , the heater 300 , and the distribution chamber 240 can all be disposed in a dense space within the driving unit 200 , thereby increasing spatial utilization.

Hereinafter, the overall structure of the heater 300 will be described with reference to FIG. 4 . 4 is a perspective view showing the overall appearance of the heater 300 .

The heater 300 includes a case 310 forming an exterior; It may include a heating element 320 disposed on the lower side of the case 310 .

A heating space 300s to be described later may be formed inside the case 310 , and the heating element 320 may supply heat to the washing water flowing in the heating space 300s.

The heater 300 includes a heater inlet port 311 to which the heater inlet pipe 301 is connected; a heater outlet port 312 to which the heater outlet pipe 302 is connected; It may include a steam pipe 313 to which the steam nozzle inlet pipe 183 is connected.

The heater inlet port 311 may be formed to protrude radially outward from the case 310 .

The heater outlet port 312 may be formed to protrude radially outward from the case 310 .

The steam pipe 313 may be formed to protrude radially outward from the case 310 .

In this embodiment, the heater inlet pipe 301 is connected to the heater 300 through the heater inlet port 311 , and the heater outlet pipe 302 is connected to the heater 300 through the heater outlet port 312 . Although described as that, the heater inlet pipe 301 and the heater outlet pipe 302 may be directly connected to the heater 300 without passing through the heater inlet port 311 and the heater outlet port 312 . The heater inlet port 311 may be a "heater inlet pipe" in that washing water flows in, and the heater outlet port 312 may be a "heater outlet pipe" in that washing water exits.

The heater inlet pipe 301 may be directly connected to the heater 300 to supply washing water to the heating space 300s.

The heater discharge pipe 302 is directly connected to the heater 300 to receive washing water from the heating space 300s.

The heater 300 includes a rib 314 for fixing the heater 300 to the driving unit 200 ; It may include a boss 315 into which various sensors (not shown) are inserted.

The rib 314 may be formed to protrude radially outward from the case 310 . The heater 300 may be fixed in the driving space 200S through a predetermined fixing member (not shown) penetrating the rib 314 .

A sensor (not shown) for measuring temperature, humidity, flow rate, etc. in the heating space 300s may be inserted into the heater 300 through the boss 315 .

Hereinafter, a flow flow of washing water through the heater 300 will be described with reference to FIG. 5 . 5 is a view showing the shape of the heater 300 viewed from the upper side to the downward direction.

The heater 300 may receive washing water from the washing pump 220 through the heater inlet pipe 301 , and supply the heated washing water to the distribution chamber 240 through the heater discharge pipe 302 .

The heater inlet pipe 301 may be connected to the heater 300 through the heater inlet port 311 , but may be directly connected to the heater 300 without passing through the heater inlet port 311 .

The heater discharge pipe 302 may be connected to the heater 300 through the heater outlet port 312 , but may be directly connected to the heater 300 without passing through the heater outlet port 312 .

The steam pipe 313 may be formed adjacent to the heater inlet port 311 than the heater outlet port 312 . The steam pipe 313 may be formed above the heater inlet port 311 and the heater outlet port 312 . The steam pipe 313 may be inclined upwardly from the case 310 . Steam generated in the heating space 300s may flow to the steam injection nozzle 180 through the steam pipe 313 formed on the upper side.

The steam nozzle inlet pipe 183 may be connected to the heater 300 through the steam pipe 313 , but may be directly connected to the heater 300 without passing through the steam pipe 313 . Steam generated in the heating space 300s may flow to the steam injection nozzle 180 through the steam pipe 313 and the steam nozzle inlet pipe 183 .

The heater inlet pipe 301 and the heater outlet pipe 302 may extend in a direction crossing each other.

The heater inlet pipe 301 may extend along the Y-line diagram Y shown in FIG. 5 , and the heater discharge pipe 302 may extend along the X-ray diagram X shown in FIG. 5 . The extension direction Y of the heater inlet pipe 301 and the extension direction X of the heater outlet pipe 302 may cross each other. The extension direction Y of the heater inlet pipe 301 and the extension direction X of the heater discharge pipe 302 may cross each other to form a first central angle θ1. The heater inlet pipe 301 may extend in a direction crossing the heater outlet pipe 302 to form a first central angle θ1 .

Hereinafter, an internal structure of the heater 300 will be described with reference to FIG. 6 . 6 is a view showing a shape in which the heater 300 is cut in the transverse direction and viewed from the lower side toward the top.

A heating space 300s in which the washing water introduced from the washing pump 220 flows is formed in the heater 300 . In the heater 300 , an inlet 310a through which the washing water flows into the heating space 300s and an outlet 310b through which the washing water flows out from the heating space 300s are formed.

The inlet 310a may mean a boundary portion where the heater inlet port 311 and the heating space 300s communicate. When the heater inlet pipe 301 is directly connected to the heater 300 , the inlet 310a may mean a boundary portion where the heater inlet pipe 301 and the heating space 300s communicate. The inlet 310a may mean an inner space of the heater inlet port 311 .

The inlet 310a may refer to a portion cut in an arc shape from the outer wall of the cylindrical case 310 . The inlet 310a may be defined as a region extending in an arc shape between the first one side end 311a and the first other side end 311b of the heater inlet port 311 .

The outlet 310b may mean a boundary portion where the heater outlet port 312 and the heating space 300s communicate. When the heater discharge pipe 302 is directly connected to the heater 300 , the outlet 310b may mean a boundary portion where the heater discharge pipe 302 and the heating space 300s communicate. The outlet 310b may mean an inner space of the heater outlet port 312 .

The outlet 310b may refer to a portion cut in an arc shape from the outer wall of the cylindrical case 310 . The outlet 310b may be defined as a region extending in an arc shape between the second one end 312a and the second other end 312b of the heater outlet port 312 .

The heater 300 includes a first guide 331 extending from the inlet 310a toward the outlet 310b; and a second guide 332 extending from the outlet 310b toward the inlet 310a and spaced apart from the first guide 331 .

The first guide 331 may form a continuous surface with the inner surface of the heater inlet pipe 301 , and the second guide 332 may form a continuous surface with the inner surface of the heater discharge tube 302 . can do.

The first outer end portion 331g of the first guide 331 may be connected to the first side end portion 311a of the heater inlet port 311 . The first side end 311a of the heater inlet port 311 may constitute the inner surface of the heater inlet pipe 301, and the first outer end 331g is connected to the first side end 311a and is continuous side can be formed.

The first outer end 331g of the first guide 331 may be connected to the heater inlet port 311 through the auxiliary guide 333 .

The auxiliary guide 333 may be connected to the first side end 311a of the heater inlet port 311 from one side, and may be connected to the first outer end 331g of the first guide 331 from the other side.

The auxiliary guide 333 may be formed to protrude radially inward from the inner surface of the heater inlet port 311 . When the heater inlet pipe 301 is directly connected to the heater 300 , the auxiliary guide 333 may be formed to protrude radially inward from the inner surface of the heater inlet pipe 301 .

The heater 300 includes a guide 330 for guiding the flow of washing water introduced into the heating space 300s.

The guide 330 may include a first guide 331 , a second guide 332 , and an auxiliary guide 333 .

The second outer end 332g of the second guide 332 may be connected to the second one end 312a of the heater outlet port 312 . The second one-side end 312a of the heater outlet port 312 may constitute an inner surface of the heater discharge pipe 302, and the second outer end 332g is connected to the second one-side end 312a and is continuous side can be formed.

The heating space 300s includes a first heating space 300s1 formed on one side of the guide 330; It may be divided into a second heating space 300s2 opposite to the first heating space 300s1 and formed on the other side of the guide 330 .

The first heating space 300s1 may be formed to communicate with the inlet 310a and the outlet 310b. The second heating space 300s2 may be a space separated from the first heating space 300s1 by the guide 330 . The second heating space 300s2 may communicate with the first heating space 300s1 through a spaced interval between the first guide 331 and the second guide 332 . The second heating space 300s2 may communicate with the inlet 310a and the outlet 310b through a spaced interval between the first guide 331 and the second guide 332 .

The washing water introduced through the inlet 310a flows into the heating space 300s. The washing water in the heating space 300s may flow from the first heating space 300s1 toward the second heating space 300s2 through the space formed between the first guide 331 and the second guide 332 . The washing water in the heating space 300s may flow from the second heating space 300s2 toward the first heating space 300s1 through the space formed between the first guide 331 and the second guide 332 . The first heating space 300s1 and the second heating space 300s2 may share washing water through a space formed between the first guide 331 and the second guide 332 .

Hereinafter, the shape of the guide 330 will be described with reference to FIG. 7 . 7 is a view showing the shape seen through the side by cutting the heater 300 in the longitudinal direction.

The case 310 includes a case outer wall 310d extending in the circumferential direction to form a heating space 300s therein; A top plate 310c disposed on the upper side of the case outer wall 310d may be included.

The heating space 300s may mean a space surrounded by the case outer wall 310d under the top plate 310c. The inlet 310a and the outlet 310b may be opened and formed in the case outer wall 310d.

The first guide 331 and the second guide 332 may be formed to protrude downward from the top plate 310c.

The first guide 331 and the second guide 332 may be spaced apart upward from the lower surface of the heater 300 . The first guide 331 and the second guide 332 may be spaced apart from the heating element 320 upwardly. A gap G that is vertically spaced apart may be formed between the first guide 331 and the heating element 320 . A gap G spaced up and down may be formed between the second guide 332 and the heating element 320 .

Due to the above-described structure, it is possible to prevent the first guide 331 and the second guide 332 from being corroded or melted by high temperature.

The thickness of the first guide 331 and the second guide 332 may become narrower toward the lower side.

The upper thickness w1 of the first guide 331 may be thicker than the lower thickness w2 of the first guide 331 .

The second guide 332 may have the same thickness distribution as the first guide 331 , and the upper thickness w1 of the second guide 332 may be thicker than the lower thickness w2 of the second guide 332 . have.

The thickness of the first guide 331 and the second guide 332 may be 3 mm or less. The upper thickness w1 of the first guide 331 and the second guide 332 may be 3 mm.

Due to the above-described structure, during injection molding or press molding, mold production is facilitated, and adhesion between the mold and the molten material is improved, so that the tolerance of the guide 330 can be reduced.

Hereinafter, a detailed structure of the guide 330 will be described with reference to FIG. 8 . 8 is an enlarged view of the guide 330 disposed in the heater 300 .

The first guide 331 may include a first connection part 331a extending in a straight line from the inlet 310a. The second guide 332 may include a second connection part 332a extending in a straight line from the outlet 310b.

The first connection part 331a may be connected to the auxiliary guide 333 and may extend from the auxiliary guide 333 in a straight line.

The second connection part 332a may be connected to the heater outlet port 312 and may extend linearly from the heater outlet port 312 .

Due to the above-described structure, it is possible to suppress the occurrence of eddy currents in the vicinity of the inlet 310a and the outlet 310b.

The first guide 331 includes a first bent portion 331b inclined from the first connection portion 331a toward the outlet 310b; and a first extension portion 331c extending from the first bent portion 331b toward the outlet 310b.

The first bent portion 331b may have a predetermined radius of curvature R1 and R2, and the first connection portion 331a and the first extension portion 331c may be connected to each other.

The first bent portion 331b may have a radius of curvature R2 of one side 331f greater than a radius of curvature R1 of the other side 331e. The other side 331e of the first bent part 331b may form a boundary of the first heating space 300s1, and the one side 331f of the first bent part 331b is a second heating space 300s2. boundaries can be formed. One side 331f and the other side 331e of the first bent portion 331b may face each other. A radius of curvature R2 of the one side 331f may be formed within a range of 20 to 26 mm, and a radius of curvature R1 of the other side 331e may be formed within a range of 17 to 23 mm. The radius of curvature R2 of the one side 331f may be 23 mm, and the radius of curvature R1 of the other side 331e may be 20 mm.

The second guide 332 includes a second bent portion 332b inclined toward the inlet 310a from the second connection portion 332a; and a second extension portion 332c extending from the second bent portion 332b toward the inlet 310a.

The second bent portion 332b may have a predetermined radius of curvature R3 and R4 , and the second connecting portion 332a and the second extended portion 332c may be connected to each other.

The second bent portion 332b may have a radius of curvature R3 of one side 332e larger than a radius of curvature R4 of the other side 332f. The other side 332f of the second bent part 332b may form a boundary of the second heating space 300s2, and the one side 331e of the second bent part 332b is the first heating space 300s1. boundaries can be formed. One side 331e and the other side 332f of the second bent portion 332b may face each other. The radius of curvature R3 of the one side 332e may be formed within the range of 20 to 26 mm, and the radius of curvature R4 of the other side 332f may be formed within the range of 17 to 23 mm. The radius of curvature R3 of the one side surface 332e may be 23 mm, and the radius of curvature R4 of the other side surface 332f may be 20 mm.

A distribution space 300s3 through which the washing water flows may be formed between the first extension 331c and the second extension 332c.

The distribution space 300s3 may communicate the first heating space 300s1 and the second heating space 300s2 with each other. The distribution space 300s3 may be included in the heating space 300s.

The first extension 331c may extend toward the outlet 310b to form a first edge 331d. The second extension portion 332c may extend toward the inlet 310a to form a second edge 332d. The first edge 331d may be an inner end of the first guide 331 , and the second edge 332d may be an inner end of the second guide 332 .

The distribution space 300s3 may be understood as a space between the first edge 331d and the second edge 332d.

The first guide 331 and the second guide 332 may be formed to be symmetrical to each other. The first guide 331 and the second guide 332 may be formed to be symmetrical to each other with respect to the distribution space 300s3. The first guide 331 and the second guide 332 may have the same shape as each other.

The inner end 331d of the first guide 331 and the inner end 332d of the second guide 332 may be disposed to face each other.

The first extension 331c may extend toward the second edge 332d, and the second extension 332c may extend toward the first edge 331d.

The length L1 of the first connection part 331a may be longer than the length L2 of the first extension part 331c. The length L3 of the second connection part 332a may be longer than the length L4 of the second extension part 332c.

The ratio of the length L1 of the first connection part 331a to the length L2 of the first extension part 331c may be in the range of 1.2 to 1.6. The ratio of the length L3 of the second connection part 332a to the length L4 of the second extension part 332c may be within a range of 1.2 to 1.6.

The length L1 of the first connection part 331a may be formed within a range of 17 to 23 mm, preferably 20 mm. The length L3 of the second connection part 332a may be formed within a range of 17 to 23 mm, and preferably may be 20 mm.

The length L2 of the first extension portion 331c may be formed within a range of 10 to 16 mm, preferably 13.25 mm. The length L4 of the second extension portion 332c may be formed within a range of 10 to 16 mm, preferably 13.25 mm.

The distribution interval D, which is the length between the first edge 331d and the second edge 332d, may be shorter than the length L1 of the first connection part 331a. The distribution interval D may be shorter than the length L3 of the second connection part 332a. The distribution interval (D) may mean the length of the distribution space (300s3).

The distribution interval D may be longer than the length L2 of the first extension 331c. The distribution interval D may be longer than the length L4 of the second extension 332c.

The distribution interval (D) may be formed within the range of 14 to 20 mm, preferably 17 mm.

The first extension portion 331c may be formed to be inclined with respect to the extension direction Q of the second connection portion 332a, and the inclination angle θ2 of the first extension portion 331c with respect to the second connection portion 332a is 45 may be less than or equal to

The second extension portion 332c may be formed to be inclined with respect to the extension direction P of the first connection portion 331a, and the inclination angle θ2 of the second extension portion 332c with respect to the first connection portion 331a is 45 may be less than or equal to

The first connection part 331a may extend from the inlet 310a along the first extension direction P, and the second connection part 332a may extend from the outlet 310b along the second extension direction Q. have. The first extension direction P and the second extension direction Q may be formed parallel to each other.

The first extension part 331c and the second extension part 332c may extend to face each other, and may extend along the third extension direction T.

The first extension part 331c may extend to have a second central angle θ2 with respect to the first connection part 331a and the second connection part 332a, and the size of the second central angle θ2 may be 45 degrees or less. can

The second extension portion 332c may extend to have a second central angle θ2 with respect to the first connection portion 331a and the second connection portion 332a, and the size of the second central angle θ2 is preferably It may be 40.1 degrees.

The heater 300 may have a cylindrical shape, and a center O may be formed in the heating space 300s. The distance from the center O to the inner peripheral surface of the case outer wall 310d may be formed within a range of 40 to 46 mm, preferably 43 mm.

According to the shape of the guide 330 described above, the washing water introduced into the heating space 300s through the inlet 310a is smoothly guided toward the outlet 310b to form a uniform flow rate distribution, and the distribution space ( The exchange of washing water between the first heating space 300s1 and the second heating space 300s2 through 300s3) is maintained smoothly to form a uniform pressure distribution in the heating space 300s.

Hereinafter, guides 330 , 330 ′ and 330 ″ according to various embodiments of the present invention will be described with reference to FIGS. 9 , 10 , and 11 . 9 is a diagram illustrating a guide 330 according to a first embodiment of the present invention, FIG. 10 is a diagram illustrating a guide 330' according to a second embodiment of the present invention, and FIG. 11 is a diagram illustrating the present invention It is a diagram for explaining the guide 330'' according to the third embodiment.

Referring to FIG. 9 , an opening H1 for communicating the first heating space 300s1 and the second heating space 300s2 is formed between the first guide 331 and the second guide 332 . The first guide 331 and the second guide 332 may be formed to be spaced apart from each other, and the opening H1 may be formed between the first extension 331c and the second extension 332c.

10, the guide 330' is formed between the first guide 331' and the second guide 332', and is lower than the first guide 331' and the second guide 332'. A third guide 334' having a height may be further included. The first guide 331' and the second guide 332' are formed to be spaced apart from each other, and the opening H2 is formed between the first extension part 331c' and the second extension part 332c' and the third guide ( 334') may be formed on the lower side. The first heating space 300s1 and the second heating space 300s2 may communicate with each other through the opening H2 formed under the third guide 334'. In the second embodiment, the first connection part 331a', the first bent part 331b', the first extension part 331c', the second connection part 332a', the second bent part 332b', and the second Since the second extension part 332c' is the same as that of the first embodiment, a detailed description thereof will be omitted.

Referring to FIG. 11 , the guide 330 ″ continuously extends from the inlet 310a to the outlet 310b , and the opening H3 is formed by being perforated in the guide 330 . The guide 330'' may form a continuous surface without being separated. The guide 330'' may form a continuous extension 330c'' between the first bent part 331b'' and the second bent part 332b'', and the opening H3 is the extension. A plurality of portions 330c'' may be formed. The first connection part 331a'', the first bent part 331b'', the second connection part 332a'' and the second bent part 332b'' in the third embodiment are the same as in the first embodiment. Therefore, detailed description is omitted.

Hereinafter, with reference to FIGS. 12, 13, 14 and 15, the effect of the guide 330 according to an embodiment of the present invention will be described. 12 is a contour showing the flow velocity distribution inside the heater when the guide is not installed, FIG. 13 is a contour showing the flow velocity distribution inside the heater when a non-separated integral guide is installed, and FIG. 14 is an embodiment of the present invention A contour showing the flow velocity distribution inside the heater 300 when the separate guide 330 according to It is a graph comparing the amount of pressure loss when installed.

Referring to FIG. 12 , the washing water is concentrated on the wall surface of the heater in the heater B1 and flows relatively quickly. Accordingly, in the heater discharge passage A1, the washing water is concentrated on one wall surface of the heater and flows rapidly, and flows relatively slowly on the other wall surface opposite to the one wall surface, resulting in stagnant phenomenon of the washing water. Pressure loss due to non-uniform flow in the heater discharge passage (A1) adversely affects the washing water circulation.

Referring to FIG. 13 , the washing water is concentrated and flows near the guide by the guide in the inside of the heater B2. Accordingly, the washing water shows a uniform flow velocity distribution in the heater discharge passage A2.

Referring to FIG. 14 , washing water is concentrated near the guide 330 by the guide 330 in the heater B3 and flows. However, the flow of washing water is formed in the heating space 300s by the structure of the separable guide 330 . In addition, the washing water shows a uniform flow velocity distribution in the heater discharge passage (A3).

15, when the integrated guide is installed, the amount of pressure loss according to the washing water flow rate is shown in the form of a first curve C2, and when the detachable guide 330 according to the embodiment of the present invention is installed, the pressure loss according to the washing water flow rate The amount of pressure loss is expressed in the form of the second curve (C3).

In both the first curve C2 and the second curve C3, the amount of pressure loss increases as the washing water flow rate increases. As the washing water flow rate increases, the difference in the amount of pressure loss between the first curve C2 and the second curve C3 increases.

When the washing water flow rate is 40LPM, the pressure loss amount of the second curve C3 is smaller than the pressure loss amount of the first curve C2 by the first pressure difference PD1, and the first pressure difference PD1 is about 2.5 kPa.

When the washing water flow rate is 50LPM, the pressure loss amount of the second curve C3 is smaller than the pressure loss amount of the first curve C2 by the second pressure difference PD2, and the second pressure difference PD2 is about 4 kPa.

When the washing water flow rate is 60LPM, the pressure loss amount of the second curve C3 is smaller than the pressure loss amount of the first curve C2 by the third pressure difference PD3, and the third pressure difference PD3 is about 5 kPa.

This is because, when the integrated guide is installed, the flow of washing water between the first heating space and the second heating space is insufficient, so that a pressure difference is generated between the first heating space and the second heating space.

When the separate guide 330 according to the present invention is installed, the washing water exchange is made between the first heating space 300s1 and the second heating space 300s2 through the distribution space 300s3, and the first heating space 300s1 and the first heating space 300s1 By reducing the pressure difference between the two heating spaces 300s2, the pressure loss inside the heater 300 can be minimized.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention belongs, without departing from the gist of the present invention as claimed in the claims Various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims

a washing tank in which a washing object is accommodated and washing water is sprayed;

a sump disposed below the washing tank and receiving the washing water;

a washing pump connected to the sump and extruding the washing water accommodated in the sump toward the washing tank;

a spray nozzle for supplying the washing water extruded from the washing pump into the washing tank; and

A heater which is disposed to be connected to the washing pump and the spray nozzle, respectively, a heating space through which the washing water flows, an inlet through which the washing water flows into the heating space, and an outlet through which the washing water exits from the heating space, respectively. including,

The heater is

a first guide extending from the inlet toward the outlet; and

and a second guide extending from the outlet toward the inlet and spaced apart from the first guide.
The method of claim 1,

a heater inlet pipe connected to the heater to communicate with the inlet; and

and a heater discharge pipe connected to the heater so as to communicate with the outlet;

The heater inlet pipe and the heater outlet pipe extend in a direction crossing each other.
3. The method of claim 2,

The outer end of the first guide forms a continuous surface with the inner surface of the heater inlet pipe,

The outer end of the second guide forms a continuous surface with the inner surface of the heater discharge pipe.
3. The method of claim 2,

The heater inlet pipe,

A dishwasher having an auxiliary guide connected to the first guide.
The method of claim 1,

The inner end of the first guide and the inner end of the second guide are disposed to face each other.
The method of claim 1,

The first guide and the second guide are formed to be symmetrical to each other.
The method of claim 1,

The first guide and the second guide are spaced apart upward from a lower surface of the heater.
The method of claim 1,

The thickness of the first guide and the second guide becomes narrower toward the lower side of the dish washing machine.
The method of claim 1,

The first guide is

and a first connecting portion extending in a straight line from the inlet,

The second guide is

and a second connection part extending linearly from the outlet.
11. The method of claim 10,

The first guide is

a first bent part inclined toward the outlet from the first connection part; and

and a first extension portion extending from the first bent portion toward the outlet,

The second guide is

a second bent portion inclined toward the inlet from the second connection portion; and

and a second extension portion extending from the second bent portion toward the inlet,

A distributing space in which the washing water flows is formed between the first extension part and the second extension part.
12. The method of claim 11,

The length of the first connection part is longer than the length of the first extension part,

A length of the second connection part is longer than a length of the second extension part.
12. The method of claim 11,

The length ratio of the first connection part and the first extension part is between 1.2 and 1.6.
12. The method of claim 11,

The first bent part,

A dishwasher in which the radius of curvature of one side is larger than the radius of curvature of the other side.
12. The method of claim 11,

The first extension portion is formed to be inclined with respect to the extending direction of the second connection portion,

An inclination angle of the first extension portion with respect to the second connection portion is 45 degrees or less.
12. The method of claim 11,

A distance between the inner end of the first guide and the inner end of the second guide is shorter than the length of the first connection part and the second connection part.
12. The method of claim 11,

A distance between the inner end of the first guide and the inner end of the second guide is longer than lengths of the first extension and the second extension.
a washing tank in which a washing object is accommodated and washing water is sprayed;

a sump disposed below the washing tank and receiving the washing water;

a washing pump connected to the sump and extruding the washing water accommodated in the sump toward the washing tank;

a spray nozzle for supplying the washing water extruded from the washing pump into the washing tank; and

and a heater disposed to be connected to the washing pump and the injection nozzle, respectively, and having a first heating space and a second heating space in which the washing water flows,

The heater is

and a guide extending from the inlet through which the washing water is introduced toward the outlet through which the washing water is discharged, and having an opening communicating the first heating space and the second heating space.
18. The method of claim 17,

The guide is

a first guide extending from the inlet toward the outlet; and

and a second guide extending from the outlet toward the inlet and spaced apart from the first guide.
19. The method of claim 18,

The guide is

The dishwasher further comprising a third guide formed between the first guide and the second guide and having a height lower than that of the first guide and the second guide.
18. The method of claim 17,

The guide extends continuously from the inlet to the outlet,

The opening is formed by a perforation in the guide.