WO2018026227A1

WO2018026227A1 - Dishwashing machine

Info

Publication number: WO2018026227A1
Application number: PCT/KR2017/008423
Authority: WO
Inventors: 한신우
Original assignee: 엘지전자 주식회사
Priority date: 2016-08-04
Filing date: 2017-08-03
Publication date: 2018-02-08
Also published as: KR102595211B1; KR20180015934A

Abstract

A dishwashing machine according to one embodiment of the present invention, which includes an air jet generator which draws in air through an air intake part to generate air bubbles in washing water, comprises a noise reduction chamber for reducing noise generated in the air jet generator.

Description

dish washer

The present invention relates to a dishwasher, and more particularly, to a dishwasher including an air jet generator for generating an air bubble therein and a noise reduction chamber for reducing noise.

The dishwasher is a home appliance that sprays washing water onto a washing object to remove foreign substances remaining in the washing object. The dishwasher removes the dirt from the washing object by spraying the washing water onto the washing object contained in the rack according to the washing course selected by the user.

As a method for effectively removing foreign matters from the dishes, a strong detergent or a method of increasing the spray pressure of the washing water may be used, and an air bubble may be included in the washing water.

Washing water including the air bubble, as the air bubble disappears, generates free radicals excellent in sterilization and chemical decomposition ability, and can effectively remove foreign substances on the tableware.

The smaller the bubble size, the larger the total surface area, the slower the floating speed, the larger the internal pressure, the better the adsorption of hydrophobic molecules, and the higher the solubility of the gas. Therefore, if there are many air bubbles of such a small size in the washing water, a great effect can be obtained in dish washing.

However, in order to form an air bubble having a fine size, noise may occur in the process of injecting and pulverizing air, and such noise may cause inconvenience to a user who uses the dishwasher.

The problem to be solved by the present invention is to provide a dishwasher that minimizes the noise generated in the dishwasher in the process of forming a fine size air bubble.

The problem to be solved by the present invention is to expand the movement path of the generated noise, to provide a dishwasher that minimizes the noise to the user.

The problem to be solved by the present invention is to provide a dishwasher for forming an air bubble in the wash water by using a conventional pump for washing the dish without a separate pump for supplying the washing water to the air jet generator to form an air bubble.

The problem to be solved by the present invention is to provide a dishwasher for pulverizing the air bubble formed in the wash water to the maximum, to generate bubbles of a fine size.

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

In order to achieve the above object, the dishwasher according to the present invention, in the dishwasher comprising an airjet generator for generating air bubbles in the wash water by sucking the air through the air suction, reducing the noise generated in the airjet generator Including a noise reduction chamber to reduce the noise generated in the air jet generator for generating the air bubble.

The air jet generator of the dishwasher according to the present invention, the impeller for applying a centrifugal force to the flowing washing water; A pressure reducing unit for lowering the pressure of the washing water passing through the impeller; An air suction unit for injecting air into the decompression unit; A pressurizing unit for increasing a pressure to crush the air introduced from the air suction unit; And an air tap in which a plurality of holes are formed to crush air contained in the washing water passing through the pressurizing unit, thereby generating a fine size air bubble.

The noise reduction chamber of the dishwasher according to the present invention reduces the noise generated in the air suction unit, thereby reducing the noise of the portion where the noise is mainly generated.

The air suction unit of the dishwasher according to the present invention forms an inlet opening upwardly, and the noise reduction chamber is connected to the air suction unit upper portion, thereby preventing the residual water from flowing into the noise reduction chamber.

The noise reduction chamber of the dish washing machine according to the present invention includes: a chamber lower portion extending from the air suction portion to form a flow passage extended from the air suction portion; And an upper portion of the chamber configured to maintain the same extended passage area under the chamber at a predetermined interval, thereby extending the path through which the noise is transmitted, thereby reducing the noise.

The lower part of the chamber forms an inclined surface at a portion where the cross-sectional area of the flow path is greatly expanded, and thus the residual water may be prevented from remaining in the noise reduction chamber.

The noise reduction chamber of the dishwasher according to the present invention is formed in a structure surrounding the air suction unit, and the air suction unit is formed with an inlet opening downwardly, so as to reduce the residual water to the maximum within the noise reduction chamber. have.

The noise reduction chamber of the dish washing machine according to the present invention comprises: a circumferential portion surrounding the air suction portion; And a protruding tube opened and extended from one side of the circumference portion, wherein the air suction portion is disposed at a portion where the decompression portion of the decompression portion ends, and the protruding tube is adjacent to a portion at which the decompression portion of the decompression portion starts decompression It is formed, it is possible to extend the path through which the noise is transmitted, to reduce the noise.

The shape of the plurality of holes formed in the air tab is formed in the shape of a long hole formed to the left and right, the air tab maintains the proper rigidity, the sucked air can be crushed well.

In order to achieve the above object, a dishwasher according to another embodiment of the present invention is a tub for receiving dishes; A spray module for spraying washing water toward the dishes in the tub; A sump for supplying washing water to the injection module; A pump for pumping the washing water stored in the sump into the injection module; An air jet generator receiving a portion of the washing water pumped from the pump and forming an air bubble in the washing water and discharging it into the sump; And a noise reduction chamber for reducing noise generated by the air jet generator, wherein the air jet generator comprises: an impeller for applying centrifugal force to the flowing washing water; A pressure reducing unit for lowering the pressure of the washing water passing through the impeller; An air suction unit for injecting air into the decompression unit; A pressurizing unit for increasing a pressure to crush the air introduced from the air suction unit; And an air tap having a plurality of holes formed to crush the air contained in the washing water passing through the pressurizing unit, thereby reducing noise generated in the air suction unit generating the air bubble.

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

According to the air jet generator of the dishwasher of the present invention has one or more of the following effects.

First, including an air jet generator to form an air bubble in the dishwasher, to enhance the ability to wash the dishes and at the same time reduce the noise generated when the air is sucked into the air intake portion of the air jet generator, the user unpleasant due to noise This has the advantage of minimizing.

Second, since the air jet generator of the dishwasher according to the present embodiment generates air bubbles in the washing water through a branched flow by branching a part of the washing water supplied from the pump, when the pump of the dishwasher is driven for dishwashing, This is an advantage that occurs constantly.

Third, there is an advantage that the air bubble can be generated even at a low pressure by using a pump disposed inside the existing dishwasher without using a separate pump.

Fourth, some of the flow branched from the pump rotates along the impeller vanes, the air is sucked and pulverized along the air crushing tube, there is also an advantage that the generation amount of the air bubble while passing through the air tap.

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

1 is a schematic front cross-sectional view of a dish washer according to one embodiment of the present invention.

2 is a block diagram illustrating a flow of washing water of the dishwasher including the air jet generator according to an embodiment of the present invention.

3 is an exploded perspective view of an air jet generator including a noise reduction chamber according to an embodiment of the present invention.

4 is a side cross-sectional view of an air jet generator including a noise reduction chamber according to an embodiment of the present invention.

Figure 5 (a) is a view showing the advancing direction of the air in the noise reduction chamber according to an embodiment of the present invention.

Figure 5 (b) is a view showing the direction of the noise of the noise reduction chamber according to an embodiment of the present invention.

FIG. 6 is a view illustrating an arrangement of an air jet generator including a noise reduction chamber and a connection relationship between a noise reduction chamber and a tub according to an embodiment of the present invention.

7 is a view for explaining the arrangement of the air jet generator including a noise reduction chamber according to an embodiment of the present invention.

8 is a view for explaining a side arrangement of the air jet generator including a noise reduction chamber according to an embodiment of the present invention.

9 is a perspective view of an air jet generator including a noise reduction chamber according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view taken along line AA ′ of FIG. 9.

Figure 11 (a) is a view showing the advancing direction of the air in the noise reduction chamber according to another embodiment of the present invention.

Figure 11 (b) is a view showing the direction of the noise of the noise reduction chamber according to another embodiment of the present invention.

12 is a block diagram of a dishwasher including an air jet generator and a high pressure pump according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, an air jet generator of a dish washing machine according to embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, the dishwasher 10 according to the present embodiment includes a cabinet assembly 12 forming an external appearance, a rack 22 disposed inside the cabinet assembly 12, and a table 22 mounted thereon, and the cabinet assembly. (12) an injection module (24) disposed inside and spraying the washing water toward the dishes, a sump (20) disposed inside the cabinet assembly (12) and supplying the washing water to the injection module (24), and a sump ( 20) or a water supply module 38 for supplying water to the injection module 24, a drain module 32 connected to the sump 20 to discharge the washing water to the outside, and installed in the sump 20 to filter the wash water. It includes a filter assembly (30). In addition, the dishwasher 10 may further include a heater module 42 installed on the sump 20 to heat the washing water.

The cabinet assembly 12 forms an outer shape of the dishwasher. The cabinet assembly 12 is installed in the cabinet 14 and the door 16 coupled to the cabinet 14 to open and close the inside of the cabinet 14 and the cabinet 14. Or a tub 18 to which steam is applied.

The rack 22 is installed inside the tub 18, and tableware is mounted on the rack 22.

The injection module 24 is for injecting the washing water toward the tableware, and includes an injection nozzle 26 and a nozzle passage 28 for supplying the washing water to the injection nozzle 26.

A plurality of injection nozzles 26 may be disposed, and a plurality of nozzle passages 28 may also be disposed corresponding to the injection nozzles 26, and nozzle passage switching units for selectively supplying washing water to the nozzle passages 28 ( 44 is disposed.

In the present embodiment, the injection module 24 is configured to spray the washing water received from the sump 20 in which the washing water is stored. Unlike the present embodiment, the injection module 24 may be configured to receive water directly through the water supply module 38. Do.

The water supply module 38 is configured to receive water from the outside and to supply the sump 20, and in this embodiment, the water is supplied to the sump 20 through the filter assembly 30.

The drain module 32 is for discharging the wash water stored in the sump 20 to the outside, and is composed of a drain channel 34 and a drain pump 36.

The filter assembly 30 is for filtering foreign substances such as food waste contained in the wash water, and is disposed on the flow path of the wash water flowing from the tub 18 to the sump 20.

To this end, the sump 20 may be formed with a filter mounting portion for installing the filter assembly 30, a filter flow path for connecting the filter mounting portion and the inside of the sump 20 may be disposed.

The sump 20 further includes a sump storage unit configured to store the washing water therein, and further includes a pump 40 for pumping the stored washing water into the injection module 24.

The pump 40 pumps the washing water stored in the sump 20 to the injection module 24. The pump 40 is connected to the injection module 24 through the pump passage.

The pump 40 according to the present embodiment supplies the washing water to the air jet generator 100 in addition to the injection module 24 through the branch pipe 230. The air jet generator 100 is supplied with the washing water through a flow path branched from the pump, and sucks and pulverizes the gas through the air suction unit 140 (refer to FIGS. 3 and 4) to be described below. Generate. The air jet generator 100 is connected to the tub 18 or sump 20. Therefore, when the pump is operated, the washing water generated by the air jet generator 100 is supplied into the sump 20 by the air jet generator 100, and the washing water pumped to the injection module 24 includes air bubbles.

The sump 20 is connected to a steam flow path and a steam nozzle for ejecting steam generated by the heater module 42 into the tub 18, and a valve (not shown) for controlling the steam may be installed in the steam flow path. , To control the steam injected into the tub 18 through the valve, it is possible to adjust the amount of steam in some cases.

Here, the steam generated in the sump 20 may be supplied into the tub 18 through the filter flow path and the filter mounting portion instead of the steam nozzle. The sump 20 may be bidirectionally connected to the tub 18 through the steam flow passage and the filter flow passage.

2 is a block diagram showing the flow of the washing water of the dishwasher including the air jet generator according to an embodiment of the present invention, Figure 3 is an air jet generator including a noise reduction chamber according to an embodiment of the present invention 4 is a side cross-sectional view of an air jet generator including a noise reduction chamber according to an embodiment of the present invention. 5 is a view showing the air and the direction of the noise of the noise reduction chamber according to an embodiment of the present invention, Figure 6 is an arrangement of the air jet generator including a noise reduction chamber according to an embodiment of the present invention; A diagram showing a connection relationship between a noise reduction chamber and a tub. FIG. 7 is a view illustrating an arrangement of an air jet generator including a noise reduction chamber according to an embodiment of the present invention, and FIG. 8 is a view of an air jet generator including a noise reduction chamber according to an embodiment of the present invention. It is a figure for demonstrating side surface arrangement.

Referring to Figure 2, the flow of the washing water flowing through the air jet generator will be described. The washing water stored in the sump 20 of the dishwasher 10 is supplied to the injection module 24 through the pump 40, and is introduced into the sump 20 again through the tub 18. In the dishwasher 10 according to the present embodiment, a part of the washing water that has passed through the pump 40 is also introduced into the air jet generator 100 that generates air bubbles in the washing water.

The air jet generator 100 is supplied with a part of the washing water discharged from the pump 40. The air jet generator 100 uses the impeller 170, the air suction unit 140, the air crushing pipe 110 and the air tap 180 including the pressure reducing unit 120 and the pressurizing unit 130 formed therein. Pass the air bubble in the wash water. The washing water including the air bubble is introduced into the sump 20 again. In this case, the wash water including the air bubble may be introduced into the sump 20 through the tub 18. Accordingly, when the pump 40 is operated by the operation of the dishwasher 10, air bubbles are generated in the washing water.

3 to 8, a dishwasher 10 including an air jet generator 100 and

noise reduction chambers

300 and 400 according to an embodiment of the present invention will be described.

The dishwasher 10 according to the embodiment of the present invention includes an air jet generator for generating air bubbles in the washing water by sucking the air through the air suction unit, and reducing noise generated by the air jet generator 100.

Chambers

300, 400.

The air jet generator 100 according to the present embodiment includes an impeller 170 for applying centrifugal force to the flowing washing water, a pressure reducing unit 120 for lowering the pressure of the washing water passing through the impeller, and an air suction unit for injecting air into the pressure reducing unit. 140, a pressurizing unit 130 for increasing pressure to crush air introduced from the air suction unit, and an air tap 180 having a plurality of holes formed to crush air contained in the washing water passing through the pressurizing unit. In addition, the

noise reduction chambers

300 and 400 reduce noise generated by the air suction unit 140.

Decompression unit 120 is reduced in the cross-sectional area of the flow path in the direction of the washing water, pressurizing unit 130 is formed such that the ratio of the passage cross-section per passage length is greater than the ratio of the passage cross-section per passage length of the decompression unit, The air suction unit 140 is disposed at a portion where the flow path area of the pressure reduction unit 120 is reduced.

The decompression unit 120 and the pressing unit 130 forms one air crushing tube 110.

The air jet generator 100 is connected to an inlet pipe 210 through which a part of the washing water passed through the pump 40 flows through the air grinding tube 110, and the washing water passing through the air grinding tube 110 is discharged. It is connected to the discharge pipe 220.

The inlet pipe 210 is connected to the air crushing pipe 110 to send a part of the washing water discharged from the pump 40 to the air crushing pipe 110. The discharge pipe 220 connects the air crushing pipe 110 and the sump 20 or the tub 18 to flow the washing water discharged from the air crushing pipe 110 to the sump 20 or the tub 18.

The inlet end surface 112 of the air crushing pipe 110 and the end surface of the inlet pipe 210 are joined in a fusion manner at the portion in contact with each other. The discharging end surface 114 of the air crushing pipe 110 and the end surface of the discharging pipe 220 are joined in a fusion manner at the portions in contact with each other.

Referring to Figure 5, the impeller 170 is mounted on the impeller mounting portion 150 of the air pulverization pipe 110 to be described below. The impeller 170 is disposed before the decompression unit 120 of the air crushing tube 110 in the direction in which the washing water flows. Therefore, the impeller 170 may not be mounted on the impeller mounting portion 150 of the air crushing pipe 110, but may be disposed between the inlet pipe 210 or between the pressure reducing part 120 and the inlet pipe 210. .

The impeller 170 according to the present embodiment is mounted and fixed to the impeller mounting part 150. The impeller 170 includes an impeller circumference 172 forming an annular shape and a vane 174 installed inside the impeller circumference 172 to apply centrifugal force to the washing water. The impeller circumference 172 is fixed to the impeller mounting portion 150.

The washing water passing through the impeller 170 rotates as it passes through the vane 174 to generate swirl flow. The vane 174 of the impeller 170 exerts a centrifugal force on the washing water flowing to the decompression unit 120. The vanes 174 of the impeller 170 may be fixed or rotated, and apply centrifugal force to the wash water passing through the impeller 170.

The air crushing pipe 110 includes a pressure reducing unit 120 for reducing pressure of the washing water and increasing the speed of the washing water and a pressurizing unit for rapidly increasing the cross-sectional area of the flow path. Air intake portion 140 through which air is sucked is formed

The air crushing pipe 110 further includes an impeller mounting part 150 on which the impeller 170 is mounted, and an air tap mounting part 160 on which the air tap 180 is mounted.

The air crushing tube 110 is disposed in the order of the impeller mounting portion 150, the pressure reducing portion, the pressurizing portion and the air tap mounting portion 160 in the direction in which the washing water flows. The air suction unit 140 is formed at a portion where the flow path cross-sectional area of the pressure reduction unit 120 is reduced. Air suction unit 140 forms an inlet opening in the upper direction at the end of the decompression of the decompression unit 120.

Impeller mounting portion 150 is connected to the end of the inlet pipe 210, the inner circumference of the impeller mounting portion 150 is formed to correspond to the outer circumference of the impeller circumference 172, the impeller 170 is impeller mounting portion 150 Mounted and fixed).

The decompression unit 120 is disposed in a direction in which the washing water flows, next to the impeller mounting unit 150 of the air crushing pipe 110. The decompression unit 120 is a part of the air crushing pipe 110 into which the washing water passing through the impeller 170 is introduced. Decompression unit 120 is the cross-sectional area of the flow path in the direction of the washing water is reduced, the washing water flowing through the decompression unit 120 is reduced in pressure, the speed is increased.

Decompression unit 120, the cross section of the flow path is gradually reduced in the direction of the washing water.

Decompression unit 120 forms an air suction unit 140 at the end of the decompression. The air suction part 140 is formed at a portion where the flow path cross section of the pressure reduction part 120 is reduced.

Air suction unit 140 according to an embodiment of the present invention forms an inlet 142 opened in the upper direction of the dishwasher in the opposite direction to the ground, so that water is introduced into the air suction unit even if the pump does not operate To prevent it from standing.

The air suction unit 140 forms a suction port 142 that is open upward from one side of the pressure reducing unit 120. The air suction unit 140 includes an air suction pipe 144 protruding from one side of the pressure reducing unit 120 to form a flow path through which air is sucked.

In the air jet generator 100 according to the exemplary embodiment of the present invention, the noise reduction chamber 300 is connected to the upper portion of the air suction unit 140. The noise reduction chamber 300 is disposed above the air suction pipe 144 of the air suction unit 140.

The noise reduction chamber 300 extends from the air suction unit 140 to form an extended flow path area of the lower chamber chamber 310 and the lower chamber chamber chamber 310, which form a flow path that is larger than the air suction unit 140. It comprises a chamber upper portion 320 for maintaining the interval.

The lower chamber 310 extends from the upper portion of the air suction unit 140 to greatly expand the cross-sectional area of the flow path. The lower chamber 310 forms an inclined surface at a portion connected to the air suction unit 140. At the portion where the cross-sectional area of the flow path of the lower chamber 310 is greatly expanded, the inclined surface is formed so that the residual water in the noise reduction chamber 300 is naturally discharged to the air jet generator 100.

The chamber upper part 320 is disposed above the chamber lower part 310. The upper chamber 320 maintains an extended flow path area of the lower chamber chamber 310 at the same constant interval, and the noise reduction chamber 300 forms a space that spreads and reduces the noise generated at the air suction unit to the expanded space. do.

The upper chamber 320 is coupled to the lower chamber 310 at the lower side, and the upper portion of the upper chamber 320 is connected to the connection passage 330.

Referring to FIG. 5, when the air suction direction and the noise transmission direction of the noise reduction chamber 300 are described, when the air jet generator 100 operates, a negative pressure is formed at a portion where the decompression of the pressure reduction unit 120 ends, thereby Air is introduced into the air suction unit 140. In the air jet generator 100 according to the present embodiment, as shown in FIG. 5A, air flows into the noise reduction chamber 300 through the upper chamber 320, and into the noise reduction chamber 300. The introduced air is introduced into the air suction unit 140 connected to the lower chamber 310.

On the other hand, the noise generated when the air is introduced into the air suction unit 140 is transmitted to the inside of the noise reduction chamber 300 along the air suction pipe 144 of the air suction unit 140 as shown in FIG. Then, the noise spreads along the lower portion of the chamber 310 of the noise reduction chamber 300 to the expanded region, and is transferred upward along the inside of the upper chamber 320 in which the expanded flow path area is maintained, thereby reducing the noise.

The connection passage 330 connects the air suction unit 140 and the tub 18. Referring to FIG. 6, the connection passage 330 may be connected to a tub hole 19 formed in a water jacket 50 disposed on a side surface of the upper chamber 320 and the tub 18 of the noise reduction chamber 300. .

Decompression unit 120 has a flow path area decreases toward the direction of the washing water is reduced, the pressure of the washing water is lowered, the negative pressure is lower than the atmospheric pressure is formed in the inlet 142 of the air intake unit 140 to suck the outside air by itself do. The air sucked into the air pulverization pipe 110 is primarily pulverized by the speed and the turning force of the washing water flowing inside the decompression unit 120.

The washing water including primarily crushed air flows to the pressurizing unit 130.

The pressurizing unit 130 is disposed in a direction in which the washing water flows, next to the pressure reducing unit 120 of the air crushing pipe 110. The pressurizing unit 130 flows in the washing water passing through the pressure reducing unit 120.

The pressurizing unit 130 increases the pressure to crush the air introduced from the air suction unit 140. The pressurizing unit 130 sharply increases the cross-sectional area of the flow path in the direction in which the washing water flows so as to crush the air contained in the washing water. The pressing unit 130 is formed such that the ratio ΔH2 / L2 of increasing the radius of the passage cross-section per flow passage length is greater than the ratio ΔH1 / L1 of decreasing the radius of the passage cross-section per passage length of the decompression portion.

The flow path cross-sectional area of the discharge end of the pressing unit 130 is formed to be wider than the flow path cross-sectional area of the inflow end of the pressure-reducing unit 120. The pressurizing unit 130 is larger than the cross section of the flow path of the inlet pipe 210 so that the air pulverization through the pressure difference effectively occurs.

As the cross-sectional area of the flow path increases rapidly, the speed of the washing water decreases and the pressure increases rapidly. Due to the sudden increase in pressure, the air in the wash water is secondarily crushed.

The pressurizing unit 130 has a side cross-section of the flow path increasing in the direction of the washing water, such as a curve of the second function, and then bent in a stepped manner, and the side cross-section of the flow path is widened. Since the pressurization unit 130 expands the cross section of the flow path in a narrow section step by step, air crushing in the washing water through the pressure difference proceeds effectively.

The air tap mounting unit 160 is disposed in a direction in which the washing water flows, next to the pressing unit 130 of the air crushing pipe 110. The air tap mounting unit 160 maintains a constant flow path extended from the pressing unit 130, and the air tap 180 is mounted therein.

The air tap 180 is mounted to the air tap mounting unit 160 of the air crushing pipe 110. The air tap 180 is fixed to the air tap mounting unit 160. The air tap 180 is disposed at a position spaced apart from the pressing unit 130 by a predetermined distance.

The air tap 180 has a disc shape, and a plurality of holes 182 penetrating the inside are formed. The washing water passing through the pressurizing unit 130 passes through the air tap. The air in the wash water is pulverized tertiarily while passing through the plurality of holes 182 formed in the air tap 180.

The holes 182 formed in the air tap 180 are densely arranged at regular intervals in the disk-shaped air tap 180. The air tap 180 may be an air tap 180 having a through hole or a long hole having a long hole formed to the left or right.

In addition, it may be a cross-long hole combined with an ellipse long formed up and down and long oval formed left and right.

The hole 182 formed in the air tap 180 has a shearing force acting on the air bubble as the contact area of the air tap 180 increases, thereby increasing the amount of air bubble generation. However, if the size of the hole increases too much, such as the cross-hole type, it may be a problem in the reliability of the air tap, it is preferable to form a long hole-type hole.

The hole of the air tap 180 in which the long hole is formed is formed long in the left and right direction, and the ratio of the vertical height and the left and right length of the long hole is increased in the ratio of 1: 4 to 6, and the amount of air bubble is increased. Since it is also suitable for the reliability aspect, the ratio of the height of the hole-shaped hole to the left and right lengths is preferably 1: 4 to 6.

While the wash water passes through the pressurizing unit 130, the sucked air is secondarily crushed. The air tap 180 has air that is sucked to be spaced apart from the pressurizing unit 130 at a predetermined interval by the pressurizing unit 130 and sufficiently crushed secondly, and then passes through the air tap 180 again to the air bubble Increase the amount Therefore, the distance L3 from which the air tap 180 is spaced apart from the pressurizing unit 130 to maximize the amount of air bubbles is preferably maintained at a distance greater than or equal to the diameter size D of the cross section of the air tap.

The thinner the air tap 180, the lower the possibility of clogging by foreign matters, and there is an advantage that mass production is easy. Since the thickness of the air tap 180 does not have a big difference in the effect of crushing air, it is preferable to produce the thickness of the air tab 180 in the range of 2-5 mm.

The discharge pipe 220 has a form in which the side cross section of the flow path is reduced in the portion where the washing water is introduced. The discharge end of the air pulverization pipe 110, in order to reduce the size of the flow path volume of the discharge pipe 220 connected to the tub 18 or the sump 20, while the flow path is expanded for crushing air, discharge pipe 220 ) Has a form in which the side cross section of the flow path is reduced in the portion where the washing water is introduced.

Referring to FIG. 7, the air jet generator 100 is disposed on the lower side of the dishwasher 10. The air jet generator 100 is disposed under the dishwasher 10 in consideration of vibration and noise generated in the process of sucking air and forming an air bubble, and is close to the pump 40 to minimize the flow path volume. It is placed on the side.

The inlet pipe 210 includes an inlet pipe fixing part 212 that fixes the inlet pipe 210. The air jet generator 100 may include an inlet pipe fixing part 212 to minimize the vibration because the vibration occurs as the air is sucked and crushed. The inlet pipe fixing part 212 may be fixed to the bottom of the cabinet 14. Discharge pipe 220 may include a discharge pipe fixing portion (not shown) for fixing the discharge pipe 220, the discharge pipe fixing portion may be fixed to the side of the cabinet (14).

Referring to FIG. 8, the height Oh of the center of the discharge end of the pressurizing unit 130 from the bottom of the dishwasher 10 is the height Ih of the center of the inflow end of the pressure reducing unit 120 from the bottom of the dishwasher 10. Placed higher than). Since the center of the discharge end of the air pulverization pipe 110 is disposed higher than the center of the inflow end, the residual water remaining in the air jet generator 100 is discharged to the inlet pipe 210 even if the pump is stopped. Water does not accumulate inside the generator 100.

However, in one embodiment, the height (Oh) of the center of the discharge end of the pressurizing unit 130 from the bottom of the dishwasher 10 and the height (Ih) of the center of the inlet end of the pressure reducing unit 120 from the bottom of the dishwasher (10) It is also possible to form the same.

9 is a perspective view of an air jet generator including a noise reduction chamber according to another embodiment of the present invention, and FIG. 10 is a cross-sectional view taken along line AA ′ of FIG. 9. FIG. 11 is a diagram illustrating a direction in which air and noise of a noise reduction chamber according to another embodiment of the present invention are shown. FIG.

9 to 11, a noise reduction chamber and an air jet generator including the same according to another embodiment of the present invention will be described. The noise reduction chamber 400 according to the present embodiment has a periphery of the air intake unit 140. Form a structure that surrounds.

The noise reduction chamber 400 according to the present embodiment surrounds the air suction unit 140 ′ in which noise is generated. Specifically, the air suction unit 140 ′, a part of the pressurizing unit 130, and the pressure reducing unit 120 are enclosed.

The noise reduction chamber 400 includes a circumference portion 410 surrounding the air suction portion and a protruding tube 420 extending from one side of the circumference portion 410.

The circumference 410 extends in parallel in the direction of the pressing part while maintaining the same cross-sectional area from the inlet end of the pressure reducing part 120. The circumference 410 forms a space for noise reduction between the air pulverization pipe 110. The inner surface of the circumference portion 410 is spaced apart from the air intake portion 140 by a predetermined distance, and forms a protruding tube 420 opened upward in a position adjacent to the impeller.

The protruding tube 420 is formed in an upward direction at one side of the circumference 410. The protruding pipe 420 is formed with a suction opening that opens in the upper direction of the circumference 410 at a portion where the decompression of the decompression unit 120 starts. The protruding tube 420 is spaced apart from the air suction unit 140 to the maximum in the noise reduction chamber 400. The protruding pipe 420 is connected to the connection passage 330 at the top. The connection passage 330 is connected to the tub.

The air jet generator 100 according to the present embodiment has the same function and shape as the air jet generator described with reference to FIGS. 3 to 8 except for the air suction unit 140 ′.

The air suction unit 140 ′ according to the present exemplary embodiment forms an inlet 142 ′ opened downward from one side of the pressure reducing unit 120. Even if the residual water is present in the noise reduction chamber 400, the air suction unit 140 ′ is formed downward from one side of the decompression unit 120 so that the residual water below the noise reduction chamber may be sucked in the air suction process.

The air suction part 140 'includes an air suction pipe 144' protruding from one side of the pressure reducing part 120 to form a flow path through which air is sucked. An end portion of the air suction pipe 144 'is spaced apart from the circumference 410 of the noise reduction chamber 400 by a predetermined distance.

Referring to FIG. 11, when the air jet generator 100 operates, a negative pressure is formed at a portion at which the decompression unit 120 ends decompression, and external air flows into the air intake unit 140 ′. In the air jet generator 100 according to the present embodiment, as shown in FIG. 11A, air is introduced into the noise reduction chamber 400 through the protruding pipe 420. Air introduced into the noise reduction chamber 400 is introduced into the air suction unit 140 and injected into the air jet generator 100.

On the other hand, the noise generated when the air is introduced into the air suction unit 140 is transferred into the noise reduction chamber 400 along the air suction pipe 144 'of the air suction unit 140', and the noise reduction chamber 400 is While being transmitted to the protruding pipe 420 along the inner circumferential portion 410 of the, the noise is reduced.

Referring to FIG. 12, the dishwasher 10 according to another embodiment of the present invention is supplied with the washing water stored in the sump 20 to the injection module 24 through the pump 40, and the sump through the tub 18. Inflow to (20).

The air jet generator 100 is not connected to the branch pipe 230 branched from the pump 40, but is connected to the tub 18 or the sump 20 through a separate high pressure pump 240. Therefore, the wash water stored in the sump 20 flows to the injection module 24 through the pump 40 or flows to the air jet generator 100 through the high pressure pump 240 to form an air bubble.

According to another embodiment of the present invention, when the dishwasher 10 includes a separate high pressure pump 240, since the pressure of the washing water flowing into the air crushing tube 110 is strongly formed, it is advantageous to form an air bubble.

Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

[Description of the code]

10: dishwasher 20: sump

40: pump 100: air jet generator

110: air grinding tube 120: pressure reducing unit

130: pressurization unit 140: air suction unit

170: impeller 180: air tap

210: inlet pipe 300, 400: noise reduction chamber

310: lower chamber 320: upper chamber

410: circumference 420: protrusion tube

Claims

In the dishwasher comprising an air jet generator for sucking air through the air suction unit to generate an air bubble in the wash water,

And a noise reduction chamber for reducing noise generated by the air jet generator.
The method of claim 1,

The air jet generator,

An impeller applying centrifugal force to the flowing wash water;

A pressure reducing unit for lowering the pressure of the washing water passing through the impeller;

An air suction unit for injecting air into the decompression unit;

A pressurizing unit for increasing a pressure to crush the air introduced from the air suction unit; And

And an air tap having a plurality of holes formed therein to crush air contained in the washing water passing through the pressing unit.
The method of claim 1,

The noise reduction chamber is a dish washer to reduce the noise generated in the air suction.
The method of claim 1,

The noise reduction chamber is connected to the upper portion of the air suction.
The method of claim 4, wherein

And the air suction unit forms a suction opening opened upward.
The method of claim 4, wherein

The noise reduction chamber,

A chamber lower part extending from the air suction part to form a flow path extended than the air suction part; And

And a chamber upper portion which maintains the same extended passage area under the chamber at a predetermined interval.
The method of claim 6,

And a lower portion of the chamber to form an inclined surface at a portion where the cross-sectional area of the flow path is greatly expanded.
The method of claim 1,

The noise reduction chamber is formed in a structure surrounding the air suction unit.
The method of claim 8,

And the air suction unit forms a suction port opened downward.
The method of claim 8,

The air jet generator,

An impeller applying centrifugal force to the flowing wash water;

A pressure reducing unit for lowering the pressure of the washing water passing through the impeller;

An air suction unit for injecting air into the decompression unit;

A pressurizing unit for increasing a pressure to crush the air introduced from the air suction unit; And

It includes an air tap formed with a plurality of holes to crush the air contained in the washing water passing through the pressurizing portion,

The noise reduction chamber is formed in a structure that surrounds a portion of the pressing portion and the pressure reducing unit.
The method of claim 10,

The noise reduction chamber

A circumference surrounding the air intake; And

Dishwasher comprising a protruding tube that is opened at one side of the circumference.
The method of claim 11,

The air suction unit is disposed at the end of the decompression of the decompression unit,

And the protruding tube is formed at a portion adjacent to a portion at which decompression of the decompression portion starts.
The method of claim 2,

The shape of the plurality of holes formed in the air tap is a dishwasher having a long hole formed left and right.
Tub for receiving tableware;

A spray module for spraying washing water toward the dishes in the tub;

A sump for supplying washing water to the injection module;

A pump for pumping the washing water stored in the sump into the injection module;

An air jet generator receiving a portion of the washing water pumped from the pump and forming an air bubble in the washing water and discharging it into the sump; And

A noise reduction chamber for reducing the noise generated in the air jet generator,

The air jet generator

An impeller applying centrifugal force to the flowing wash water;

A pressure reducing unit for lowering the pressure of the washing water passing through the impeller;

An air suction unit for injecting air into the decompression unit;

A pressurizing unit for increasing a pressure to crush the air introduced from the air suction unit; And

And an air tap having a plurality of holes formed therein to crush air contained in the washing water passing through the pressing unit.
The method of claim 14,

The noise reduction chamber is the dishwasher is connected to the noise reduction chamber is the upper portion of the air suction.
The method of claim 14,

The noise reduction chamber is formed in a structure surrounding the air suction unit.
The method according to claim 15 or 16,

The dishwasher further comprises a connection flow path connecting the noise reduction chamber and the tub.