Patent Publication Number: US-11389044-B2

Title: Dish washer

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present disclosure claims priority to and the benefit of Korean Patent Application No. 10-2019-0079318, filed on Jul. 2, 2019, the disclosure of which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present disclosure relates to a dish washer, and more particularly, to a dish washer including an air jet generator which generates an air bubble in water. 
     BACKGROUND 
     A dish washer is a household appliance which washes a food debris on a surface of the dish washer by using high-pressure water sprayed from a spray nozzle. 
     The dish washer includes a tub in which a washing tank is formed, and a sump which is mounted on a bottom surface of the tub to store the water. The water stored in the sump is moved to an internal space of the tub by a pumping action of a washing pump and washes a dish disposed in the internal space of the tub. In addition, foreign substances in the water are filtered by a filter, and then, the water flows into the sump. The water circulates the sump and the tub so as to wash the dish. 
     A conventional dish washer may disclose an air jet generator which forms air bubbles in water supplied to a tub using a portion of water fed by a washing pump. 
     However, in the above-described air jet generator, a flow direction of the water is horizontal. Accordingly, when an upper space inside the pipe is not fully filled with the water, there may be a problem that air bubbles are not easily formed by depressurizing or pressurizing the water. 
     Moreover, when the air jet generator is disposed in a state where the air jet generator is not fixed inside a space formed by a base, there may be a problem that a connection structure of the air jet generator is damaged by vibrations that are generated when the dish washer is carried. 
     SUMMARY 
     The present disclosure describes a structure capable of stably fixing an air jet generator to an inside of a dish washer. 
     Aspects of the present disclosure are not limited to the above-described ones. 
     Additionally, other aspects and advantages that have not been mentioned can be clearly understood from the following description and can be more clearly understood from implementations. Further, it will be understood that the aspects and advantages of the present disclosure can be realized via means and combinations thereof that are described in the appended claims. 
     According to one aspect of the subject matter described in this application, a dish washer includes a tub defining a washing space, a base disposed below the tub and defining a space below the tub, a sump disposed in the space defined by the base and configured to store water, a washing pump disposed in the space defined by the base and configured to supply the water stored in the sump to the washing space, and an air jet generator having a venturi shape including (i) an air inlet provided on one side, (ii) an inlet having a downward opening, and (iii) an outlet provided above a bottom surface of the tub. The air jet generator can be configured to receive a portion of the water discharged from the washing pump and generate air bubbles in the water. Moreover, the air jet generator may further include (i) a tub mounting portion fixing an upper portion of the air jet generator to the bottom surface of the tub and (ii) a base fixing portion disposed below the tub mounting portion, the base fixing portion coupling a lower portion of the air jet generator to the base. 
     Implementations according to this aspect may include one or more of the following features. For example, the base fixing portion may include a fixing rib which protrudes outward from a peripheral surface of the air jet generator, extends vertically, and is coupled to the base. 
     In some examples, the base may include an air jet generator fixing portion, the air jet generator fixing portion including a fixing groove mounting a portion of the fixing rib. The fixing groove may be opened upward. 
     In some examples, the air jet generator fixing portion may include a first plate in contact with the fixing rib and configured to limit a longitudinal movement of the air jet generator and a pair of second plates extending perpendicularly from both ends of the first plate and configured to limit a lateral movement of the air jet generator. 
     In some examples, the fixing rib may include a fixing rib groove, the fixing rib groove provided towards an upward direction in a lower end portion of the fixing rib. The first plate may be inserted into the fixing rib groove. 
     In some implementations, a vertical protrusion may be disposed at an end portion of the fixing rib. The vertical protrusion may be perpendicularly provided in both directions and may be adjacent to each of the pair of second plates. 
     In some examples, the pair of second plates may be disposed to be in contact with both ends of the vertical protrusion. 
     In some implementations, the tub mounting portion may have a plate shape extending radially from an upper peripheral surface of the air jet generator and may be in contact with the bottom surface of the tub and below the bottom surface of the tub. 
     In some examples, the tub mounting portion may include (i) an upper fixing plate which circumferentially protrudes on an outer peripheral surface of the air jet generator and is disposed below the bottom surface of the tub and (ii) an upper fixing portion which passes through a lower hole provided in the bottom surface of the tub, the upper fixing portion protruding upward. 
     In some examples, the dish washer may further include a fixing ring coupled to the upper fixing portion and configured to limit a downward movement of an air pulverizing pipe included in the air jet generator. 
     In some implementations, the fixing ring may provide a plurality of reinforcing ribs. 
     In some examples, the plurality of reinforcing ribs may be provided perpendicular to an outer peripheral surface of the fixing ring at regular intervals. 
     In some implementations, the dish washer may further include a sealer disposed between the upper fixing plate and the fixing ring. In some examples, the upper fixing portion may provide a thread to fasten the fixing ring to the outer peripheral surface of the air pulverizing pipe included in the air jet generator. 
     In some implementations, the upper fixing portion may have a tubular shape protruding upward from the upper fixing plate. In some examples, the dish washer may further include a lower peripheral plate provided on a lower end portion of an air pulverizing pipe included in the air jet generator and providing a surface parallel to the upper fixing plate. 
     In some examples, the lower peripheral plate may have a ring shape extending radially on an outer peripheral surface of a first pipe included in the air jet generator. In some examples, the lower peripheral plate may provide a cut surface configured to limit a longitudinal movement of the air jet generator. 
     In some implementations, the air jet generator may include an air pulverizing pipe including a first pipe providing (i) an inlet at a lower side of the air pulverizing pipe, (ii) an opening in a water flowing direction, and (iii) a cross-sectional area reducing in the water flowing direction, and a second pipe disposed above the first pipe, the second pipe providing (i) an opening in the water flowing direction and (ii) a cross-sectional area increasing in the water flowing direction, and an air tab disposed at an upper portion of the second pipe and vertically provided with a plurality of air holes in the second pipe. An air inlet hole may be provided around a peripheral surface of the second pipe to communicate with an external component through an inlet end portion of the second pipe. 
     In some examples, the tub mounting portion may be provided on an upper end portion of the second pipe. The base fixing portion may extend downward from the tub mounting portion and may be provided to extend to the first pipe. 
     The air jet generator in the dish washer may be stably disposed even when external vibrations are applied through a displacement of the air jet generator to the tub and the base. Further, damages to the air jet generator can be limited by coupling the air jet generator in a plurality of directions. 
     Specific contents of other implementations are included in the detail description and drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exemplary schematic cross-sectional view of a dish washer. 
         FIG. 2  is an exemplary block diagram illustrating a flow of water in the dish washer of  FIG. 1 . 
         FIG. 3  is an exemplary diagram illustrating a perspective view of an air jet generator. 
         FIG. 4  is an exemplary diagram illustrating an exploded perspective view of the air jet generator. 
         FIG. 5  is an exemplary diagram illustrating a side cross-sectional perspective view of the air jet generator. 
         FIG. 6A  is an exemplary diagram illustrating a side view of the air jet generator. 
         FIG. 6B  is an exemplary diagram illustrating a bottom perspective view of the air jet generator. 
         FIG. 7  is an exemplary diagram illustrating a perspective view of the air pulverizing pipe mounted on a base. 
         FIG. 8  is an exemplary diagram illustrating a side perspective view of the air pulverizing pipe mounted on the base. 
         FIG. 9  is an exemplary diagram illustrating a view of the air pulverizing pipe mounted on the base. 
         FIG. 10  is an exemplary diagram illustrating a perspective view of a bottom surface of a tub mounted on the base on which the air pulverizing pipe is mounted. 
         FIG. 11  is an exemplary diagram illustrating a view of the air jet generator mounted on the tub. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, the present disclosure will be described with reference to the drawings for explaining the dish washer according to an implementation of the present disclosure. 
     Hereinafter, an exemplary dish washer and an exemplary flow of water inside the dish washer when a dish is washed will be described with reference to  FIGS. 1 and 2 . 
     With reference to  FIG. 1 , a dish washer  10  may include a cabinet  20  forming an outline, a door  22  which is coupled to the cabinet  20  and opens or closes an inside of the cabinet  20 , a tub  24  which is installed inside the cabinet  20  and forms a washing space  24   s  to which the water or steam is applied, and a base  28  which is disposed below the tub  24  and forms a space below the tub  24 . 
     The dish washer  10  may further include a dispenser which stores a detergent introduced by a user and introduces the detergent into the tub  24  in a washing step. The dispenser may be disposed in the door  22 . The tub  24  may form the washing space  24   s  where the dish is disposed. 
     The base  28  may separate the tub  24  from the ground by a predetermined distance. The base  28  forms a space where a sump  26  and a washing pump  50  are disposed. The base  28  may include an air jet generator fixing portion  29  which fixes the air jet generator  100 . 
     The dish washer  10  may further include racks  30  and  32  storing a dish inside the tub  24 , a spray module  33  spraying the water toward the dish accommodated in the racks  30  and  32 , a sump  26  supplying the water to the spray module  33 , and a washing pump  50  pressure-feeding the water stored in the sump  26  to the spray module  33 . 
     The spray module  33  can be configured to spray the water toward the dish, and may include spray nozzles  34 ,  36 , and  38  and supply pipes  42 ,  42 , and  46  connecting the washing pump  50  and the spray nozzles  34 ,  36 , and  38  to each other. 
     The dish washer  10  may further include a washing motor  52  driving the washing pump  50 , and a brushless direct current motor (BLDC) which can control a rotating speed of the washing motor  52 . 
     The dish washer  10  may further include a water supply module  60  which supplies water to the sump  26  or the spray module, a water discharge module  62  which is connected to the sump  26  and discharges the water from the sump  26 , a filter module  70  installed in the sump  26  and filters the water, and a heating module which is installed in the sump  26  and heats the water. 
     In some implementations, the dish washer  10  may include the plurality of spray nozzles  34 ,  36 , and  38 , the plurality of supply pipes  42 ,  44 , and  46  through which the water pressure-fed from the washing pump  50  are respectively supplied to the plurality of spray nozzles  34 ,  36 , and  38 , and a channel switcher  40  which supplies the water pressure-fed from the washing pump  50  to at least one of the spray nozzles  34 ,  36 , and  38 . 
     The water supply module  60  can be configured to receive the water supplied from the outside and supply the water to the sump  26 , and open or close a water supply valve  61   a  disposed in a water supply flow path  61  to supply the water from the outside into the sump  26 . The water discharge module  62  can be configured to discharge the water stored in the sump  26  to the outside and includes a water discharge channel  64  and a water discharge pump  66 . 
     The filter module  70  can be configured to filter foreign matters such as a food debris contained in the water and can be disposed in a path of the water flowing from the tub  24  into the sump  26 . 
     The dish washer  10  may further include the washing pump  50  which pressure-feeds the water stored in the sump  26  to the spray nozzles  34 ,  36 , and  38 . The washing pump  50  includes a washing pump housing  51 , a washing pump impeller  54  which is disposed inside the washing pump housing  51  and rotated to supply the water to the spray nozzles  34 ,  36 , and  38 , a washing motor  52  which rotates the washing pump impeller  54 , and a heater  56  which heats the water inside the washing pump housing  51 . 
     The washing pump  50  is connected to the sump  26  through the water supply pipe  58   a  and connected to the channel switcher  40  through a water outlet pipe  58   b . A branching pipe  80  is formed in the water outlet pipe  58   b , and a portion of the water flowing from the washing pump  50  can flow to an air jet generator  100  through the branching pipe  80 . 
     Steam generated by the heater  56  disposed in the washing pump  50  may flow into a steam nozzle  58   c  through a steam discharge pipe  58   d  and may be supplied into the tub  24  through the steam nozzle  58   c.    
     The dish washer  10  may further include the air jet generator  100  which forms air bubbles having a minute size in the water. 
     In the dish washer  10 , a portion of the water supplied by the washing pump  50  is supplied to the air jet generator  100  in addition to the spray module  33  through the branching pipe  80 . The portion of the water may include air and the air jet generator  100  may pulverize the air to generate minute air bubbles. The air jet generator  100  is connected to the tub  24  or the sump  26 . Accordingly, when the pump is operated, the air jet generator  100  supplies the water having the generated air bubbles to the sump  26 , and thus, the water pressure-fed to the spray module  33  includes the air bubbles. 
     A lower hole through which a portion of an upper side of the air jet generator  100  passes is formed at a bottom of the tub  24 . An upper portion of an air pulverizing pipe of the air jet generator  100  passes through the lower hole and will be described below. For example, a portion of the upper portion of the air pulverizing pipe of the air jet generator  100  is disposed at the bottom of the tub  24 . 
     The exemplary flow of the water will be described with reference to  FIG. 2 . The water stored in the sump  26  of the dish washer  10  is supplied to the spray module  33  through the washing pump  50 , the water supplied to the spray module  33  is sprayed to the tub  24 , and the water sprayed to the tub  24  flows into the sump  26  again. In the dish washer  10 , a portion of the water fed from the washing pump  50  flows into the air jet generator  100  which generates the air bubbles in the water. The portion of the water may flow into the air jet generator  100  through the branching pipe  80 . 
     The portion of the water flowing into the air jet generator  100  may pass through an impeller  170 , an air inlet hole  146 , the air pulverizing pipe including a first pipe  120  and a second pipe  130 , and an air tab  180  to generate the air bubbles in the water. That is, the water flowing into the air jet generator  100  flows swirly by the impeller  170 . Thereafter, a speed of the water increases while passing through the first pipe  120 , and air flowing into the air inlet hole is primarily pulverized by the washing waster which is rotated at a high speed by the impeller  170  and the first pipe  120 . Moreover, the water is secondarily pulverized while passing through the second pipe  130  and thirdly pulverized while passing through the air tab  180 , and thus, includes air bubbles having a minute size. 
     The water including the air bubbles flows into the sump  26  again. For example, the water including the air bubbles may be discharged to the tub  24  and may flow into the sump  26 . Accordingly, when the washing pump  50  is operated by operating the dish washer  10 , the air bubbles are generated in the water. 
     Hereinafter, an exemplary implementation and disposition of the air jet generator and a fixing structure of the air jet generator will be described with reference to  FIGS. 2 to 11 . 
     In  FIGS. 2 to 11 , based on displacements of the first pipe  120  and the second pipe  130  in the air pulverizing pipe  110 , a direction in which the first pipe  120  is disposed may refer to an upward direction, and a direction in which the second pipe  130  is disposed may refer to a downward direction. Moreover, based on displacements of the air chamber  150  and the fixing rib  114 , a direction in which the air chamber  150  is disposed may refer to a forward direction, and a direction in which the fixing rib  114  is disposed may refer to a rearward direction. A direction which is perpendicular to the direction in which the fixing rib  114  and a reinforcing protrusion are disposed may refer to a right-left direction. 
     The air jet generator  100  is disposed on a rear side of a bottom surface  25  of the tub  24 . In some implementations, the air jet generator  100  may be disposed at an edge side of the bottom surface  25  of the tub  24 . 
     Referring to  FIG. 11 , a mounting hole where a part of the air jet generator  100  passes is formed in a portion on which the air jet generator  100  is mounted, and a mounting surface  25   b  on which the air jet generator  100  is mounted is formed around the mounting hole. 
     A fixing ring  190  is disposed above the mounting surface  25   b  and will be described later. The mounting surface  25   b  forms a flat surface to be in close contact with a lower side of the fixing ring  190 . 
     The air jet generator  100  may form a channel perpendicular to the bottom surface  25  of the tub  24  or a ground and has a shape of a venturi tube. The air jet generator  100  may include the air pulverizing pipe  110  in which the air inlet hole  146  is formed. In some implementations, an external air may flow from one side of the air inlet hole  146  and through the air inlet hole  146 . The air jet generator  100  may further include the air tab  180  which pulverizes the air existing in the water discharged from the air pulverizing pipe, and an air chamber  150  which forms a space for the air flow and the air inlet hole  146  to communicate with an inside of the air pulverizing pipe  110  on one side of a lower portion. Moreover, the air jet generator may further include the impeller  170  which applies a centrifugal force to the water flowing to the air pulverizing pipe  110 . 
     The dish washer  10  may further include the branching pipe  80  which causes a portion of the water flowing from the washing pump  50  to the spray module  33  to flow to the air jet generator  100 . For example, an end portion of the branching pipe  80  is coupled to the lower portion of the air pulverizing pipe  110 . The branching pipe  80  and the air pulverizing pipe  110  may be coupled to each other using a fusion method. 
     A portion of the water flowing through the water outlet pipe  58   b  is supplied to the air jet generator  100  through the branching pipe  80 . That is, the branching pipe  80  branches off at the water outlet pipe  58   b  and is connected to the air jet generator  100 . 
     The impeller  170  which applies a centrifugal force to the water flowing into the air pulverizing pipe  110  may be disposed at the end portion of the branching pipe  80 . An impeller mounting portion  82 , mounting the impeller  170 , may be formed inside one side of the branching pipe  80 . In some implementations, the impeller  170  may be coupled to the impeller mounting portion  82  of the branching pipe  80  by a fusion method. 
     The impeller  170  includes a cylindrical impeller peripheral portion  172  and a vane  174 . The vane  174  may be disposed inside the impeller peripheral portion  172  and may form a swirl in the water. In the impeller  170 , an outer surface of the impeller peripheral portion  172  is disposed close to an inside of a discharge end portion of the branching pipe  80 . As the water passes through the vane  174 , the water is rotated to generate the swirl. 
     The vane  174  of the impeller  170  applies the centrifugal force to the water flowing through the first pipe  120 . In some implementations, the vane  174  of the impeller  170  may be fixed or rotated, and the water passing through the vane  174  is rotated and flows into the air pulverizing pipe  110 . 
     In some implementations, the air pulverizing pipe  110  has the shape of a venturi tube and pulverizes the air from the water, the air flowing through the air inlet hole  146 . 
     In some implementations, the air pulverizing pipe  110  may include the first pipe  120  having a cross-section area of a channel which is reduced in a direction, the direction which the water flows to reduce a pressure of the water flowing through the air pulverizing pipe  110 . The air pulverizing pipe  110  may further include the second pipe  130  having a cross-sectional area of a channel which increases in a direction, the direction which the water flows to pressurize the water including the air. Each of the first pipe  120  and the second pipe  130  has the channel with an opening. In some implementations, the channel may be implemented in up-down direction. The first pipe  120  is located on an upstream side of the second pipe  130  and is located below the second pipe  130 . 
     The air inlet hole  146  where the external air flows into the air pulverizing pipe  110  by a generated negative pressure from the air pulverizing pipe  110  is formed on a peripheral surface of a lower end portion of the second pipe  130 . In some implementations, the air inlet hole  146  is formed on an upstream end portion of the second pipe  130 . 
     The air pulverizing pipe  110  is disposed below the bottom surface  25  of the tub  24 . In some implementations, the air pulverizing pipe  110  is disposed to be perpendicular to the ground or the bottom surface  25  of the tub  24 . 
     In some implementations, the first pipe  120 , the second pipe  130 , and an air tab mounting portion  116  may be disposed in the air pulverizing pipe  110  in order with respect to the water flowing direction. 
     The air pulverizing pipe  110  may further include an air tab mounting portion  116 , mounting the air tab  180 , at the discharge end portion where the water is discharged. In some implementations, the air tab mounting portion  116  may have a shape surrounding the air tab  180  to insert the air tab  180  into the air tab mounting portion  116 . The air tab mounting portion  116  is disposed on an upper side of the air pulverizing pipe  110 . 
     In some implementations, a size of an inlet cross section of the first pipe  120  is smaller than a size of a discharge cross section of the second pipe  130 . The air pulverizing pipe  110  is disposed to be perpendicular to the ground or the bottom surface  25  of the tub  24 . The channel formed inside the air pulverizing pipe  110  is formed to be perpendicular to the ground or the bottom surface  25  of the tub  24 . 
     The first pipe  120  is disposed below the second pipe  130 . For example, the water flows from the lower side to the upper side, and thus, the first pipe  120  is disposed on an upstream side of the second pipe  130 . In the first pipe  120 , the cross-sectional area of the channel is reduced in the flow direction of the water. A length of the channel formed by the first pipe  120  is shorter than a length of the channel formed by the second pipe  130 . A diameter of the channel on a lower end portion D 1  of the first pipe  120  is smaller than a diameter of the channel on an upper end portion D 2  of the second pipe  130 . 
     The first pipe  120  may include a first pipe lower portion  122  of which a channel cross-sectional area is rapidly reduced to reduce the pressure of the water flowing into the air pulverizing pipe  110 , and a first pipe upper portion  124  which is disposed on a downstream side of the first pipe lower portion  122  and increases or maintains a velocity of the water flowing through the first pipe lower portion  122 . 
     The first pipe lower portion  122  is disposed below the first pipe upper portion  124 . A change ratio of the channel cross-sectional area of the first pipe upper portion  124  is greater than a change ratio of the channel cross-sectional area of the first pipe lower portion  122 . 
     The channel cross-sectional area of the first pipe lower portion  122  is rapidly reduced from the upstream side to the downstream side. For example, a reduction ratio of the channel cross-sectional area of the first pipe lower portion  122  is greater than that of the first pipe upper portion  124 . The pressure of the water flowing through the first pipe  120  of the air pulverizing pipe  110  is reduced while passing through the first pipe lower portion  122  and the first pipe upper portion  124  forming a negative pressure. 
     The second pipe  130  is disposed above the first pipe  120 . The second pipe  130  is disposed on a downstream side of the first pipe  120 . The channel cross-sectional area of the second pipe  130  increases in the flow direction of the water, and pressurizes the water. The water moving along the second pipe  130  is pressurized, and thus, the air flowing into the air pulverizing pipe  110  through the air inlet hole  146  is secondarily pulverized. 
     In some implementations, the second pipe  130  may be formed to be longer than the first pipe  120 . The second pipe  130  may include a second pipe lower portion  132  which primarily pressurizes the water flowing from the first pipe  120  and a second pipe upper portion  134  which secondarily pressurizes the water passing through the second pipe lower portion  132 . The second pipe lower portion  132  slowly pressurizes the water compared to the second pipe upper portion  134 . A change ratio of a channel cross-sectional area of the second pipe lower portion  132  is less than that of the second pipe upper portion  134 . For example, referring to  FIG. 5 , a length of a channel of the second pipe lower portion  132  formed in an up-down direction is longer than a length of a channel of the second pipe upper portion  134  formed in the up-down direction. A difference between inner diameters of the channels formed in both end portions of the second pipe lower portion  132  in the up-down direction is less than a difference between inner diameters of the channels formed in both end portions of the second pipe upper portion  134  in the up-down direction. 
     In the second pipe lower portion  132 , the air flowing into the air inlet hole  146  is pulverized by the flow velocity and the centrifugal force of the water. In the second pipe upper portion  134 , the channel cross section is rapidly extended. Accordingly, the water is pressurized, and the air existing inside the water can be effectively pulverized. 
     The second pipe  130  may further include an extended pipe portion which maintains the channel cross section extended by the second pipe upper portion  134 . The extended pipe portion is connected to an inner peripheral surface of an air tab peripheral surface  184 . The extended pipe portion and the inner peripheral surface of the air tab peripheral surface  184  can adjust a distance of the air tab  180  separated from the air inlet hole  146 . In order to effectively pulverize the air by the air tab  180 , preferably, a distance H 1  of the air tab  180  separated from the air inlet hole  146  is equal to or longer than a diameter  180   d  of the air tab  180 . Accordingly, a sum (which is equal to distance H 1 ) of the lengths of the channel formed by the second pipe lower portion  132 , the second pipe upper portion  134 , the extended pipe portion, and the inner peripheral surface of the air tab peripheral surface  184  is equal to or greater than the diameter  180   d  of the air tab  180 . 
     The air inlet hole  146  is formed on an upstream end portion of the second pipe  130 . The air inlet hole  146  is formed on a lower end portion of the second pipe  130 . 
     The air inlet hole  146  may be formed between the first pipe  120  and the second pipe  130 . The air inlet hole  146  is formed in a portion where the channel cross section of the first pipe  120  is reduced. The air inlet hole  146  is formed at the upstream end portion of the second pipe  130 . The air inlet hole  146  may be formed at a point where the reduction in the pressure of the first pipe  120  ends. The air inlet hole  146  may be formed at a point where the pressurization by the second pipe  130  starts. 
     The inside of the air pulverizing pipe  110  and the outside of the air pulverizing pipe  110  communicate with each other through the air chamber  150 . The air chamber  150  will be described later with respect to the air inlet hole  146 . In the air pulverizing pipe  110 , the external air can flow to the inside of the air pulverizing pipe  110  through the air inlet hole  146 . The outside may refer to the outside of the air pulverizing pipe  110 , and may include not only an outside of the cabinet  20  but also the space inside the cabinet  20  and an internal space of the tub  24 . 
     The pressure of the water flowing through the air pulverizing pipe  110  is reduced while passing through the first pipe  120 . A negative pressure is generated by the reduction in the pressure of the water passing through the first pipe, and thus, the external air is sucked into the air pulverizing pipe  110  through the air inlet hole  146 . The air flowing into the air pulverizing pipe  110  through the air inlet hole  146  is primarily pulverized by the rotating current flowing at a high speed along the first pipe  120 . 
     The air chamber  150  which reduces the noise generated in the air pulverizing pipe  110  may be disposed on one side of the air pulverizing pipe  110 . For example, the air chamber  150  may reduce the noise transmitted to the outside through the air inlet hole  146 . 
     In some implementations, the air chamber  150  may form a space where the noise is transmitted. In some implementations, the air chamber  150  may be disposed outside the air pulverizing pipe  110  in which the air inlet hole  146  is formed. IN some implementations, the air chamber  150  may include the air inlet hole  146  which can communicate with the inside of the air pulverizing pipe  110  on one side of the lower end portion. 
     The air inlet hole  146  is formed on the lower end portion of the air chamber  150 . Accordingly, even when the water flows into the air chamber  150 , the water is extracted to the air inlet hole  146  formed on the lower end portion of the air chamber  150 , and thus, the water is not accumulated inside the air chamber  150 . In some implementations, an outside air inlet  168  where the outside air flows into the air chamber  150  may be formed in the air chamber  150 . In some implementations, the outside air inlet  168  may be formed in an upper end portion of the air chamber  150 . Accordingly, the water flowing into the air chamber  150  is prevented from being extracted to the outside of the air chamber  150 . 
     In some implementations, the air chamber  150  is disposed outside the air pulverizing pipe  110  where the air inlet hole  146  is formed. A space is formed inside the air chamber  150 , and the air chamber  150  includes a chamber body  152  of which one side is open and a chamber cover  154  which covers the open one side of the chamber body  152 . 
     In some implementations, the chamber body  152  protrudes from one side of the air pulverizing pipe  110  to form a space therein and may be integrally formed with the air pulverizing pipe  110 . Moreover, the chamber cover  154  may be configured to be separated from the chamber body  152  so as to be coupled to the chamber body  152 . 
     In some implementations, the chamber body  152  and the chamber cover  154  may communicate with the inner channel of the air pulverizing pipe  110  and may be constituted by implementations separated from each other to form a space where the noise is propagated. The chamber body  152  and the chamber cover  154  are manufactured into the implementations separated from each other or coupled to each other, and thus, it may be possible to secure the space inside the air chamber  150 . For example, the chamber cover  154  may be coupled to the chamber body  152  by a fusion method. 
     In some implementations, the chamber body  152  may be disposed on the one side forming a periphery of the air pulverizing pipe  110  so that a coupling process including a separate manufacturing process can be omitted. The chamber body  152  is disposed on the one side forming the periphery of the air pulverizing pipe  110  and may play a role of reinforcing rigidities of the air pulverizing pipe  110  together with reinforcement protrusions  112 . 
     In some implementations, the chamber body  152  may be formed on an outer periphery of the air pulverizing pipe  110  where the air inlet hole  146  is formed. For example, the air inlet hole  146  is formed on one side of the air pulverizing pipe peripheral surface being in contact with an inner lower surface  155  of the chamber body  152 . Accordingly, the water accumulated in the chamber body  152  can flow to the air inlet hole  146 . In some implementations, one side surface of the chamber body  152  facing the air inlet hole  146  may be open. For example, the chamber cover  154  is disposed on the opened side surface of the chamber body  152  facing the air inlet hole  146 . In some implementations, the chamber cover  154  may cover the opened side surface of the chamber body  152 . The chamber cover  154  includes the outside air inlet  168  where the outside air flows. In addition, the chamber cover  154  includes an external connection pipe  166  which protrudes outward in a portion where the outside air inlet  168  is formed. A separate connection hose which is connected to the outside of the cabinet  20  may be mounted on the external connection pipe  166 . 
     In some implementations, the air chamber  150  may include an air guide pipe  158  which extends along the inner lower surface  155  of the air chamber  150  in the air inlet hole  146 . The air guide pipe  158  expands a path where the noise is propagated inside the air chamber  150  to reduce the noise. The air guide pipe  158  forms the inner lower surface  155  of the chamber body  152 . 
     In some implementations, the air pulverizing pipe  110  may include an air tab mounting portion  116  which is formed to mount the air tab  180  above the extended pipe portion  136 . The air tab mounting portion  116  is formed to have a size to mount the air tab  180  inside the air tab mounting portion  116 . The air tab  180  is detachably mounted on the air tab mounting portion  116 . For example, when the air pulverizing pipe  110  is mounted on the tub  24 , the air tab mounting portion  116  is disposed above the air pulverizing pipe  110 . The air tab mounting portion  116  is disposed above the second pipe  130  of the air pulverizing pipe  110  in the water flowing direction. 
     The air tab mounting portion  116  is attached to the air tab  180 . The air tab mounting portion  116  includes a fastening groove  117  which is formed to correspond to a fastening protrusion  186  of the air tab  180 . The air tab mounting portion  116  is disposed above the bottom surface  25  of the tub  24 . 
     In some implementations, the air pulverizing pipe  110  may include a tub mounting portion  137  which is attached to the bottom surface  25  of the tub  24 . The tub mounting portion  137  is formed on an outer periphery of the air pulverizing pipe  110  which is on the upper side of the second pipe  130 . In some implementations, the tub mounting portion  137  is formed on the outer peripheral surface of the air tab mounting portion  116 . The tub mounting portion  137  includes an upper fixing plate  138  which circumferentially protrudes from an outer peripheral surface of the air pulverizing pipe  110  and an upper fixing portion  140  which passes through a lower hole of the bottom surface  25  of the tub  24  and protrudes upward from the bottom surface  25  of the tub  24 . The upper fixing portion  140  is fastened to the fixing ring  190 . In some implementations, the tub mounting portion  137  may have a plate shape extending radially from an upper peripheral surface of the air jet generator  100  and is in close contact with the bottom surface  25  of the tub  24  and below the bottom surface  25  of the tub  24 . 
     The upper fixing plate  138  is formed in a ring shape protruding outward along the outer periphery of the air pulverizing pipe  110 . The upper fixing plate  138  is disposed below the bottom surface  25  of the tub  24 . The upper fixing plate  138  is disposed to face the bottom surface  25  of the tub  24 . The upper fixing plate  138  prevents the air pulverizing pipe  110  from moving upward from the bottom surface  25  of the tub  24 . For example, the upper fixing plate  138  is disposed below the bottom surface  25  of the tub  24  and is disposed to be in close contact with the bottom surface  25  of the tub  24 . 
     The upper fixing portion  140  has a tubular shape protruding upward from the upper fixing plate  138 , passes through the lower hole formed in the bottom surface  25  of the tub  24 , and is disposed above the bottom surface  25  of the tub  24 . 
     A portion of the upper fixing portion  140  is disposed above the bottom surface  25  of the tub  24 . The upper fixing portion  140  forms a thread to fasten the fixing ring  190  to the outer peripheral surface of the air pulverizing pipe  110 . The bottom surface  25  of the tub  24  is disposed between the upper fixing plate  138  and the fixing ring  190  fastened to the upper fixing portion  140 . The upper fixing portion  140  is coupled to the fixing ring  190  and prevents the air pulverizing pipe  110  from moving downward. The upper fixing portion  140  engages with the fixing ring  190  so that the bottom surface  25  of the tub  24  and the upper fixing plate  138  come into close contact with each other. 
     The fixing ring  190  has a ring shape and is fastened to the upper fixing portion  140  of the air pulverizing pipe  110 . An inner peripheral surface  192  of the fixing ring  190  has a thread corresponding to the upper fixing portion  140 . In the fixing ring  190 , a plurality of reinforcing ribs  194  which maintain rigidities of the fixing ring  190  and function as a handle is formed along an outer periphery. The reinforcing ribs  194  are formed to be perpendicular to an outer peripheral surface of the fixing ring  190  at regular intervals. 
     The air pulverizing pipe  110  includes an upper portion which is disposed above the bottom surface  25  of the tub  24  and a lower portion which is disposed below the bottom surface  25  of the tub  24 . The upper portion and the lower portion of the air pulverizing pipe  110  can be classified based on the upper fixing plate  138  of the tub mounting portion  137 . In the lower portion of the air pulverizing pipe  110 , the first pipe  120 , the air inlet hole  146 , and the second pipe  130  are disposed. In the upper portion of the air pulverizing pipe  110 , the air tab mounting portion  116  is disposed. 
     The air pulverizing pipe  110  is fastened to the tub  24  between the second pipe  130  and the air tab mounting portion  116  where the air tab  180  is mounted. In some implementations, a large amount of air is pulverized by the second pipe  130  and the air tab  180 , and vibrations and the noise may be generated. However, the air jet generator  100  is fixed to the tub  24  at the second pipe  130  and the portion adjacent to the air tab  180  where the vibrations are generated. Accordingly, the air jet generator  100  may reduce the vibrations generated in the air pulverizing pipe  110 . 
     The bottom surface  25  of the tub  24  is disposed between the upper fixing plate  138  of the air pulverizing pipe  110  and the fixing ring  190 . A sealer  196  for preventing the water flowing on the bottom surface  25  of the tub  24  from leaking downward from the bottom surface  25  of the tub  24  is disposed between the upper fixing plate  138  of the air pulverizing pipe  110  and the fixing ring  190 . For example, the sealer  196  may be disposed below and/or above the bottom surface  25  of the tub  24 . 
     A lower peripheral plate  142  which extends radially from an outer peripheral surface is formed on a lower end portion of the air pulverizing pipe  110 . The lower peripheral plate  142  may form a surface parallel to the upper fixing plate  138  formed in the upper end portion of the air pulverizing pipe  110 . 
     In some implementations, the lower peripheral plate  142  may have a ring shape extending radially on the outer peripheral surface of the first pipe  120 . However, the lower peripheral plate  142  forms a cut surface  142   a  on a surface which comes into contact with a first plate  29   a  of the air jet generator fixing portion  29 . The cut surface  142   a  of the lower peripheral plate  142  comes into contact with the first plate  29   a  and restricts a forward-backward movement of the air jet generator  100 . 
     The air pulverizing pipe  110  includes the reinforcing protrusions  112  which are formed to reinforce rigidities of the air pulverizing pipe  110  on the outer periphery where the first pipe  120  and the second pipe  130  are formed. The reinforcing protrusions  112  may reinforce the first pipe  120  and the second pipe  130  which are formed to be long with a relatively small diameter. 
     The reinforcing protrusions  112  are formed to protrude from the outer periphery of the air pulverizing pipe  110  in a length direction in which the first pipe  120  and the second pipe  130  form the channel. Four reinforcing protrusions  112  may be formed on the outer peripheral surface of the air pulverizing pipe  110  at an interval of 90°. 
     The reinforcing protrusion  112  connects the upper fixing plate  138  and the lower peripheral plate  142 , and is disposed to be perpendicular to the upper fixing plate  138  and the lower peripheral plate  142 . 
     The air pulverizing pipe  110  includes a base fixing portion  113  which fixes a lower portion of the air jet generator  100  to the base  28 . The base fixing portion  113  protrudes to have a rib shape outward from the air pulverizing pipe  110  and is mounted on the base  28 . The base fixing portion  113  may include the fixing rib  114  which protrudes outward from a peripheral surface of the air pulverizing pipe  110  and extends in the up-down direction. 
     The air pulverizing pipe  110  may include the fixing rib  114  which protrudes outward from the peripheral surface of the air pulverizing pipe  110  and extends in the up-down direction to be mounted on the base  28 . The fixing rib  114  may be one of the plurality of reinforcing protrusions  112  which are formed on the outer periphery of the air pulverizing pipe  110 . The fixing rib  114  may form a rib which further protrudes outward than the other reinforcing protrusions  112  formed on the outer periphery of the air pulverizing pipe  110 . 
     The fixing rib  114  is fixed to the air jet generator fixing portion  29  of the base  28  to be attached to the lower portion of the air jet generator  100 . The fixing rib  114  is formed inside an outer end portion of the upper fixing plate  138 . 
     Referring to  FIGS. 8 and 9 , the air jet generating fixing portion  29  is connected to the fixing rib  114  of the air pulverizing pipe  110  to be attached to the lower portion of the air jet generator  100 . The air jet generator fixing portion  29  protrudes upward from the bottom surface of the base  28  and forms a rib insertion space  29   s  where the fixing rib  114  is inserted. 
     The air jet generator fixing portion  29  includes a first plate  29   a  which is inserted into a fixing rib groove  114   a  (in  FIGS. 3, 5, 6A and 6B ) of the fixing rib  114 , and a pair of second plates  29   b  and  29   c  which extends to be perpendicularly bent from both ends of the first plate  29   a  and is in contact with both ends of a vertical protrusion  115  which is perpendicularly formed in both directions from an end portion of the fixing rib  114 . 
     The first plate  29   a  and the second plates  29   b  and  29   c  are connected to each other, and extend upward from a bottom surface  28   a  of the base  28 . The first plate  29   a  and the second plate  29   b  and  29   c  are disposed to be perpendicular to each other. 
     The first plate  29   a  fixes the air jet generator  100  in the forward-backward direction. The pair of second plates  29   b  and  29   c  fix the air jet generator  100  in the right-left direction. 
     The first plate  29   a  and the pair of second plates  29   b  and  29   c  form a rib insertion space  29   s  where an insertion portion  114   b  of the fixing rib  114  is inserted. The insertion portion  114   b  of the fixing rib  114  inserted into the rib insertion space  29   s  fixes the air jet generator  100  in the forward, backward, right, left directions. 
     The fixing rib  114  includes the fixing rib groove  114   a  which is inserted into the first plate  29   a  of the air jet generator fixing portion  29 . The fixing rib groove  114   a  is formed upward from a lower end portion of the fixing rib  114 . The first plate  29   a  is inserted into the fixing rib groove  114   a  which is formed upward from the lower end portion of the fixing rib  114 . 
     The vertical protrusion  115  which is perpendicularly bent in the fixing rib and extends in both directions is formed on the outer end portion of the fixing rib  114 . The vertical protrusion  115  forms a surface perpendicular to the fixing rib  114  and both end portions of the vertical protrusion  115  abut on the pair of second plates  29   b  and  29   c.    
     The fixing rib  114  includes a strength reinforcement rib  114   c  which extends from an outer peripheral surface of the air pulverizing pipe  110 , and the insertion portion  114   b  which extends outward from the strength reinforcement rib  114   c  and is inserted into rib insertion space  29   s  of the air jet generator fixing portion  29 . The fixing rib groove  114   a  is formed between the strength reinforcement rib  114   c  and the insertion portion  114   b.    
     A length of the fixing rib  114  extending radially outward from the fixing rib groove  114   a  decreases from the upper end of the fixing rib groove  114   a  to the lower end thereof. A length  114 D of the fixing rib  114  which extends radially outward from the fixing rib groove  114   a  on the upper end of the fixing rib groove  114   a  is longer than a length  115 D of the vertical protrusion  115  which is formed in the right-left direction on the upper end of the fixing rib groove  114   a.    
     The insertion portion  114   b  is formed on the end portion of the fixing rib groove  114   a , is in contact with the first plate  29   a , and prevents the air pulverizing pipe  110  from moving in the forward-backward direction. Both end portions of the vertical protrusion  115  formed on the end portion of the insertion portion  114   b  are in contact with the pair of second plates  29   b  and  29   c , and thus, the insertion portion  114   b  prevents the air pulverizing pipe  110  from moving in the right-left direction. 
     A lower end portion of the insertion portion  114   b  includes an inclined surface  114   b   1  which is formed to facilitate the insertion of the first plate  29   a . The inclined surface  114   b   1  is formed radially outward of the air jet generator in the lower end portion of the insertion portion  114   b.    
     The air tab  180  has a disk shape and includes a plurality of holes  182  penetrating the air tab  180 . The water passing through the second pipe  130  passes through the air tab. The air in the water is thirdly pulverized while passing the plurality of holes  182  formed in the air tab  180 . 
     The holes  182  formed in the air tab  180  are densely disposed in the air tab  180  having a disk shape at regular intervals. For example, the air tab  180  may include holes or through holes which are formed in one direction. In addition, the holes  182  may be cross long holes in which oval holes formed in upward and downward direction and oval holes formed perpendicular to the upward and downward direction are coupled. 
     As a contact area between the hole  182  and the air bubbles increases, a shearing force acting on the air bubbles and a generation amount of air bubbles increase, and thus, the long hole may be more preferable than the through hole. However, if a size of the hole like the cross long hole excessively increases, reliability of the air tab may decrease. Accordingly, the long hole may be preferable. If the size of the hole formed in the air tab increases, the size of the pulverized air may increase. Accordingly, in order to generate micro bubbles, it may be preferable that the hole formed in the air tab has a predetermined size or less. 
     The air tab  180  includes an air tab plate  181  in which the holes  182  are formed and forming a surface perpendicular to the flow direction of the water, an air tab peripheral surface  184  which extends in a direction perpendicular to the peripheral surface of the air tab plate  181 , and a fastening protrusion  186  which protrudes radially outward on one side of the air tab peripheral surface  184 . 
     In some implementations, the air tab peripheral surface  184  may extend downward from the air tab plate  181 . The air tab plate  181  and the air tab peripheral surface  184  may be formed in one implementation, but may be also be formed in separate implementations. 
     The air tab peripheral surface  184  may have a cylindrical shape having a hollow inner portion. The air tab plate  181  is disposed above the air tab peripheral surface  184 . The inner peripheral surface  185  of the air tab peripheral surface  184  is mounted on the air pulverizing pipe  110 , and forms a channel to which the water inside the air pulverizing pipe  110  flows. The inner peripheral surface of the air tab peripheral surface  184  may have the same diameter as that of the extended pipe portion of the air pulverizing pipe  110 . 
     The fastening protrusion  186  meshes with the fastening groove  117  of the air tab mounting portion  116  to be fastened thereto, and fixes the air tab  180  so that the air tab  180  is disposed inside the air pulverizing pipe  110 . 
     The air tab  180  may be attached to or detached from the air pulverizing pipe  110  upward. Accordingly, when soil is accumulated in the air tab and the channel air tab is blocked, the air tab  180  may be detached from the air pulverizing pipe  110  to remove the soil. 
     An upper portion of the air tab  180  is coupled to the nozzle  200 . The air tab  180  and the nozzle  200  may be coupled to each other by a fusion method. 
     The air tab  180  may include a fastening member  188  for fastening the nozzle  200  disposed above the air tab  180 . The fastening member  188  is formed to protrude upward on the upper portion of the air tab  180  and may have a groove where a fastening hook  202  formed in the nozzle  200  can be inserted. The fastening member  188  of the air tab  180  is fastened to the fastening hook  202  of the nozzle  200 , and thus, the nozzle  200  and the air tab  180  can be fixed to each other. 
     The nozzle  200  is disposed above the air pulverizing pipe  110 . The nozzle  200  is disposed above the air jet generator  100  and discharges the water passing through the air jet generator  100  to the inside of the tub  24 . Moreover, the nozzle  200  is disposed above the air tab  180 . The nozzle  200  may be coupled to the air tab  180  by a fusion method. 
     A lower side of the nozzle  200  is formed to be in close contact to an upper side of the air tab  180 . The nozzle  200  may include the fastening hook  202  which is fastened to the fastening member  188  of the air tab  180 . The nozzle  200  is coupled to the air tab  180 . Accordingly, the user may rotate the nozzle protruding upward from the bottom surface  25  of the tub  24  to separate the air tab from the air pulverizing pipe  110 . 
     In some implementations, the nozzle has a cylindrical shape including a hollow inside. The nozzle  200  may include an inflow hole  206  which the water passing through the air tab  180  flows, and a plurality of discharge holes  204   a ,  204   b , and  204   c  discharging the water to the tub  24  are formed on a peripheral surface of the upper portion of the nozzle  200 . The plurality of discharge holes  204   a ,  204   b , and  204   c  are formed at regular intervals along the peripheral surface of the nozzle  200 . The plurality of discharge holes  204   a ,  204   b , and  204   c  are formed along the peripheral surface of the nozzle  200 , and thus, the water including the air bubbles can be discharged to the bottoms surface of the tub  24  in various ways. 
     The nozzle  200  may include three discharge holes  204   a ,  204   b , and  204   c . The three discharge holes  204   a ,  204   b , and  204   c  may be disposed to be separated from each other at regular angles along the peripheral surface of the nozzle  200 . Each of the plurality of discharge holes  204   a ,  204   b , and  204   c  is formed at an angle θ of 70° to 90°, and thus, increase a spray range of the washing waster sprayed to the bottom surface  25  of the tub  24 . The three discharge holes  204   a ,  204   b , and  204   c  can be opened at angles different from each other. 
     While three discharge holes are described in the present disclosure, it is appreciated that any number of discharge holes can be implemented. 
     The nozzle  200  includes a nozzle upper portion which forms an upper surface, and a nozzle lower portion which is connected to a bottom of the nozzle upper portion and is mounted on an upper portion of the air tab peripheral surface  184 . 
     The nozzle upper portion and the nozzle lower portion are connected to each other, and thus, the plurality of discharge holes  204   a ,  204   b , and  204   c  are formed on the peripheral surface of the nozzle  200 . The nozzle upper portion and the nozzle lower portion may be coupled to each other in a fusion method. In the nozzle, the nozzle upper portion and the nozzle lower portion are not separated from each other, and may be integrated with each other. The nozzle lower portion includes a fastening hook  202  which is coupled to the fastening member  188  of the air tab peripheral surface  184 . A plurality of fastening hooks  202  are formed along a lower peripheral surface of the nozzle lower portion. The plurality of fastening hooks  202  may be separated from each other at regular intervals along the lower peripheral surface of the nozzle lower surface. 
     The water including the air bubbles through the air jet generator  100  is discharged to the bottom surface of the tub  24  and flows to the sump  26 . As the water flows to the bottom surface of the tub  24 , the bottom surface of the tub  24  can be washed. 
     In the air jet generator  100 , the channel where the water flows is disposed to be perpendicular to the ground of the bottom surface of the tub  24 . Accordingly, it may be possible to minimize a region in which the water flowing through the second pipe  130  cannot flow due to a rapid expansion of the channel in the second pipe upper portion  134 . 
     When an installation process of the air jet generator is described with reference to  FIGS. 7, 10, and 11 , the air pulverizing pipe  110  of the air jet generator  100  is mounted on the base  28 . In this case, the fixing rib  114  of the air pulverizing pipe  110  is mounted on the air jet generator fixing portion  29  of the base  28 . 
     Thereafter, the tub  24  is disposed above the base  28 , and the upper fixing portion  140  of the air pulverizing pipe  110  is fitted into the lower hole formed in the bottom surface  25  of the tub  24 . Thereafter, the fixing ring  190  is coupled to the upper fixing portion  140 , and thus, the air pulverizing pipe  110  can be fixed. In this case, the fixing rib  114  of the air jet generator  100  is fixed to the base  28 , the lower portion of the air jet generator is fixed, the tub mounting portion  137  is fixed to the tub  24 , and thus, the upper portion of the air jet generator can be fixed. 
     Therefore, the air jet generator  100  is stably mounted on the base  28  and the tub  24 , and thus, it may be possible to prevent the air jet generator  100  from being damaged by vibrations generated when the dish washer  10  is carried. Thereafter, as illustrated in  FIG. 11 , the nozzle  200  to which the air tab  180  is connected can be mounted on the upper side of the air pulverizing pipe  110 . 
     The present disclosure, as described above, may be replaced, modified and changed in various different forms without departing from the technical spirit of the disclosure by one having ordinary skill in the art to which the disclosure pertains. Thus, the present disclosure should not be construed as being limited to the embodiments and drawings set forth herein. 
     According to the dish washer of the present disclosure, the following one or more effects can be obtained. 
     First, the upstream side and the downstream side of the air jet generator where the water flows are mounted on and fixed to the tub and the base, respectively, and thus, the air jet generator can be stably disposed and fixed even when external vibrations are applied. 
     Second, in the structure in which the water flows upward, the upper portion of the air jet generator is fixed to the tub in the up-down direction and the lower portion thereof is fixed to the base in forward, backward, right, and left directions. Accordingly, the air jet generator is fixed in six directions as a whole, and thus, damages of the air jet generator may be prevented while the air jet generator is carried. 
     Effects of the present disclosure are not limited to the above-described effects, and other effects not mentioned are clearly understood by a person skilled in the art from descriptions of claims.