KR20060030764A - Dishwasher having swirl nozzle possessing backhole - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher, and to control flow rate and spray angle per unit time, which are essential considerations in designing a swirl nozzle of a dishwasher, by using a backhaul which is a geometric design variable.

In the dishwasher according to the present invention is a dishwasher having a cylindrical spray nozzle for spraying the washing water into the main body, the injection nozzle is in contact with the inner circumferential surface of the spray nozzle and a vertical direct inlet to rotate the injected water along the inner circumferential surface And forming a back hole to the rear of the vertical inlet injection hole to increase the flow rate per unit time and to reduce the spray angle.

Description

Dishwasher with backhaul wall nozzles {DISHWASHER HAVING SWIRL NOZZLE POSSESSING BACKHOLE}             

1 is a cross-sectional view showing a cross section of a conventional dish washer.

2 is a perspective view showing a nozzle unit of a conventional dish washer.

3 is a cross-sectional view showing a dish washer according to the present invention.

Figure 4 is a perspective view showing a nozzle unit of the dishwasher according to the present invention.

5 is a plan sectional view of the nozzle unit shown in FIG.

6 is a cross-sectional view showing a swirl nozzle equipped with a backhaul, which is a feature of the present invention.

Figure 7 shows the internal flow and operation of the backhaul wall nozzle of the dishwasher according to the present invention

 It is sectional drawing shown.

FIG. 8 is a cross-sectional view taken along the line AA ′ of FIG. 7.

Explanation of symbols on the main parts of the drawings

11: washing tank 13: dish basket

15: Backhole Wall Nozzle 16: Nozzle Head

25: nozzle unit 28: branch euro

29: connecting route 31: vertical inlet

42: backhaul 43: swirl flow

53: reflected swirl flow

The present invention relates to a dishwasher, and more particularly, to a dishwasher having an improved nozzle structure.

In general, a dishwasher is a device for washing dishes by spraying high pressure washing water on the dishes. 1 shows a dish washer having a conventional rotary spray nozzle.

A conventional dishwasher includes a main body case 15 in which a washing tank 41 is formed therein, and a door 61 that is rotatably installed on a front surface of the main body for opening and closing of the washing tank 41. In addition, the dishwasher is a high pressure to the dish basket (42a, 42b) installed in the washing tank 41, the spray nozzle 55 for spraying the washing water together with the detergent into the washing tank 41, the injection nozzle 55 for storing the dishes It includes a washing pump 46 for supplying the washing water.

In the washing tank 41, dish baskets 42a and 42b for storing dishes and the like are respectively installed at the upper and lower portions thereof. In addition, a fixed spray nozzle head 43a is installed at an inner upper portion of the washing tank 41 to spray washing water into the dishes stored in the dish baskets 42a and 42b, and a rotating spray nozzle head is disposed at the center and the lower portion of the washing tank 41. 43b and 43c are provided, respectively. In addition, the rear side of the washing tank 41 is provided with a water supply pipe 45 in which a water supply control valve 44 is installed to supply the washing water to the inside of the washing chamber 41 at the initial stage of operation. In addition, a collecting part 47 recessed to a predetermined depth is formed at the lower part of the washing tank 41 so that the washing water and the dirt accumulate, and the collecting part 47 is provided with a filter 48 for filtering the washed dirt. A suction pipe 49 is connected between the washing pump 46 and the collecting part 47 to recirculate the washing water filtered through the filter 48, and the lower part of the collecting part 47 drains the washing water after the washing operation is finished. Drainage pump 50 and a drainage pipe 51 extending from the drainage pump 50 to the outside of the main body case 15 is installed.

Figure 2 shows a rotary spray nozzle head installed in the lower portion of the washing tank of the conventional dishwasher.

A plurality of nozzles 55 are provided in the conventional rotary spray nozzle head 43c, and a flow path 53 for supplying water to the nozzle is formed under the nozzle head 43c.

The nozzle used in the conventional dishwasher was a jet nozzle (55). That is, the water reaching the nozzle unit 56 along the flow path 53 is jet-jetted through the nozzle 55 which has been blown out, and the sprayed water reaches the tableware and collides with it to wash the dishes.

However, since the conventional jet nozzle 55 can spray water to only one side, the dish area where water does not collide with the primary may be washed by the second or third flows in which the sprayed water collides with the dish. shall. At this time, there was a problem in that it is not effective to wash the dish of the recessed form, such as rice bowl. Therefore, a method of spraying water by rotating the nozzle itself or increasing the contact time between the water and the dish or increasing the amount of water has been used to increase the cleaning effect.

As shown in FIG. 1, the nozzle head connecting portion 54 connects the nozzle head and the nozzle head rotating portion 53 rotating the nozzle head to rotate the nozzle itself. It was configured to rotate without power by the water pressure from the washing pump (46).

However, even if the water is sprayed by rotating the nozzle head in this way, it was difficult for water to evenly collide inside the dishes. In particular, there was a limit in removing the rice paste attached to the inner wall of the dish-shaped dish like the rice bowls used in Korea.

In order to rotate the nozzle head, if many parts were consumed by the structure of the nozzle head rotating part for rotating the nozzle, etc., the structure was complicated accordingly. In addition, noise or vibration occurs during the rotation of the nozzle head, which makes it difficult to secure product reliability for the user.

In addition, the method of increasing the washing time or increasing the amount of water has become a factor that hinders the washing efficiency of the dishwasher.

 The present invention is to solve such a problem, an object of the present invention is to adopt a backhaul wall nozzle to form a vortex without rotating the nozzle head to reduce the washing time and power consumption while maximizing the washing efficiency In providing.

In addition, to provide a dishwasher that can easily adjust the flow rate and spray angle of the swirl flow.

In order to achieve this object, the dishwasher according to the present invention includes a dishwasher having a cylindrical spray nozzle for spraying washing water into the main body, wherein the spray nozzle is in contact with the inner circumferential surface of the spray nozzle and the injected water is along the inner circumferential surface. Forming a vertical straight inlet to be rotated is characterized by having a swirl nozzle to maximize the cleaning effect by the flow sprayed from the nozzle has a three-dimensional cone shape.

In addition, it is characterized in that it is provided with a spray nozzle for increasing the flow rate per unit time and decrease the injection angle during the swirl injection by putting a back hole to the rear of the vertical inlet injection causing the swirl.

Hereinafter, a preferred embodiment according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 3, the dishwasher according to the present invention includes a main body 10 provided with a washing tank 11 for forming a washing space therein. In addition, the main body 10 is provided with a door 12 that opens and closes by rotating up and down so that one surface of the washing tank 11 is openable, and the inside of the washing tank 11 has a dish basket 13 for storing dishes. Are accepted. At this time, the dish basket 13 is made of a wire mesh in the form of a net, and is supported through the rail 14 to facilitate withdrawal and withdrawal.

In addition, the upper part of the washing tank 11 is provided with a water supply pipe 19 having a water supply valve 18 for supplying the washing water into the washing tank 11, and the lower portion of the washing tank 11 has a predetermined depth so that the washing water and the dirt accumulate. The catchment part 20 recessed into is formed. In addition, the water collecting unit 20 is provided with a filter 21 for filtering the collected dirt collected in the water collecting unit 20. At this time, the washing water filtered by the filter 21 is connected to the suction pipe 17a of the washing pump 17 to one side of the collecting unit 20 so that the washing can be recycled, and after the washing operation is terminated in the collecting unit 20 A drain pipe 22 is connected to drain the wash water, and the drain pipe 22 is provided with a drain pump 23 for forcibly discharging the wash water.

A nozzle head 16 having a plurality of swirl nozzles 15 for spraying the washing water toward the upper dish basket 13 is provided at the inner lower portion of the washing tank 11. In addition, a lower portion of the washing tank 11 is provided with a washing pump 17 that sucks the washing water into the washing tank 11 and pressurizes it to the swirl nozzle 15. The nozzle head 16 is installed under the nozzle head 16 and is combined with a flow path for supplying washing water to form one nozzle unit 25.

Figure 4 shows an enlarged view of a back hole swirl nozzle installed in a plurality of nozzle unit and nozzle head according to the present invention.

The nozzle unit 25 is provided with a nozzle head 16 having a disk shape, a flow path 27 installed below the nozzle head to supply washing water, and a plurality of back holes installed at the nozzle head 16 to spray the washing water. A swirl nozzle 15 is provided.

As shown in the enlarged view of the backhole wall nozzle 15, the backhole wall nozzle 15 has a cylindrical shape for a predetermined length, and the radius of the cylinder becomes narrower toward the upper portion, and again forms a constant radius at the upper end, thereby forming a nozzle nozzle ( 34).

In addition, a vertical straight inlet 31 is formed at the middle side of the backhaul wall nozzle 15 so that the injected water is rotated along the inner circumferential surface of the backhaul wall nozzle 15.

A plurality of vertical inlet line 31 is preferably formed, the direction of the inlet 31 is formed so that the water introduced into each inlet is rotated in the same direction.

The flow rate in the nozzle varies according to the number of vertical direct injection holes 31 formed in the nozzle 15, and the injection angle sprayed from the nozzle 15 also changes.

As shown in FIG. 5, a flow path 27 for supplying the washing water from the washing pump 17 is formed at the lower portion of the nozzle head 16. The flow passage 27 branches from the flow passage 27 between the rows of the backhaul swirl nozzles 15 which are installed while reaching the nozzle head 16 and forming a plurality of rows in the nozzle head 16 in the radial direction. A plurality of branch flow passages 28 are formed. A plurality of connecting flow paths 29 are formed in the plurality of nozzles 15 forming one row and two adjacent branching flow paths 28 so as to be connected to the respective backhaul nozzles 15. The connection passage 29 is connected to the plurality of vertical straight inlet 31.

6 is a cross-sectional view illustrating a swirl nozzle having a backhaul, which is a feature of the present invention.

As shown in FIG. 6, the new spare space located behind the vertical inlet line 31 in the swirl nozzle vortex chamber 44 is collectively referred to as a backhaul 42. Most swirl nozzles were located at the rear end of the swirl chamber 44 in the position of the vertical inlet 31.

However, in the present invention, the backhaul is located behind the vertical inlet line 31. When the backhaul is present in this way, the nozzle is also present behind the vertical inlet line 31, so that the machining of the vertical line inlet 31 becomes easier.

Figure 7 shows the internal flow and operation of the swirl nozzle having a backhaul.

Due to the swirling motion of the swirl nozzle, the flow of the swirl nozzle has an empty ring shape 43 in the middle when the cross section is cut along the portion A-A '. The reason is that centrifugal force acts because the fluid flowing into the vertical inlet 31 moves through the vortex chamber inner wall. When the backhaul is present as shown in FIG. 6, the fluid flowing into the vertical direct injection hole 31 not only proceeds toward the nozzle injection hole 34 but also toward the backhaul 42. The flow traveling in the direction of the backhaul 42 impinges on the wall 52 at the end of the backhaul 42 and proceeds again in the direction of the nozzle injection port 34 due to the pressure drop applied to the nozzle. This reflected flow 53 loses a certain amount of circular direction momentum due to the collision and has a smaller swirl motion radius. Therefore, when the backhaul is present, the hollow portion of the swirl flow ring 43 is reduced. In this case, the cross-sectional area through which flow can flow increases, so that the flow rate per unit time increases at the same pressure drop.

According to the experiment, when the volume of the backhaul is 103% of the volume from the vertical inlet to the nozzle injection, the flow rate increases by about 15% per unit time.

The flow 53 which proceeds toward the back hole 42 and is reflected has a smaller swirl motion radius. The flow 53 must have a continuous distribution with the flow 43 that originally proceeds toward the injection nozzle 34. Otherwise the flow is contradictory because it has a boundary layer and one flows on one flow as it slides. As the circular flow momentum of the reflected flow 53 and the main flow 43 is mixed, the spray angle is reduced from α to β at the outside of the nozzle as a whole.

According to the experiment, when the volume of the backhaul is 103% of the volume from the vertical inlet to the nozzle injection port, the injection angle decreases by 25% ~ 30%.

At this time, it is preferable that the volume of the back hole 42 is determined so that the washing water sprayed through the nozzle injection hole 34 can contact the dish as much as possible. If the spray angle is too large, the flow rate in contact with the dishwasher is small, and if the spray angle is too small, water can be sprayed to only one side of the dish area where water does not collide primarily with the sprayed water. This is because the washing efficiency is reduced because the washing must be performed by the flow of the secondary or tertiary that came out.

FIG. 8 is a cross-sectional view taken along the line AA ′ of FIG. 6.

Rotating and flowing toward the nozzle nozzle and flowing toward the backhaul and colliding with the wall at the end of the backhaul reflected the tangential velocity component 35, the radial velocity component 36, and the axial velocity component ( 37) each.

Here the axial velocity component 37 actually represents the direction entering perpendicular to the ground shown in FIG. 7. That is, the component is perpendicular to the X axis and the Y axis at the same time.

The flow ejected out of the swirl nozzle 15 has a three-dimensional cone-shaped injection because of the three velocity components above. That is, the swirl nozzle injection hole 34 is sprayed to form a vertex of the cone, and the friction with the tableware has a shape that becomes the bottom of the cone.

The water sprayed in this way has a three-dimensional cone-shaped spray, and the three-dimensional spreading spray flows into the inner wall of the dish-like dish and rotates along the inner wall of the dish to wash it like a scratch. .

It is possible to reduce the spray angle of swirl flow without reducing the flow rate per unit time and to reduce the spray angle of swirl flow without changing the diameter of the nozzle.

In addition, the fine adjustment of the flow rate and injection angle per unit time, which is a sensitive design factor, is possible by the adjustment of the backhaul.

In addition, in the conventional case, since the vertical inlet inlet is located at the end of the vortex chamber, there is a difficulty in processing. However, when a backhaul exists, the nozzle is also present in the rear of the vertical inlet. It has the advantage of being easier.

Claims (5)

A dishwasher having a cylindrical spray nozzle for spraying the washing water into the main body, comprising: an inlet for rotating the washing water without rotating the nozzle and an injection nozzle having one end for adjusting the spray angle sprayed from the nozzle; Dishwasher, characterized in that. The dishwasher according to claim 1, wherein the spray angle adjusting means is a back hole formed on the opposite side of the nozzle spray port for spraying the washing water out of the nozzle, and is a space from the spray nozzle inlet port to the nozzle bottom plate. The dishwasher of claim 2, wherein the volume of the backhaul is determined to correspond to the size of the dish. The dishwasher of claim 1, wherein a plurality of inlet holes are formed and a spray nozzle having a direction of the inlet hole is formed such that water introduced into each inlet hole rotates in the same direction. According to claim 4, wherein the injection nozzle is formed in a radial nozzle head formed in a plurality of rows in a radial direction, the lower portion of the nozzle head is provided with a flow path for supplying water, the nozzle head is a plurality of And a plurality of branch flow paths branched from the flow path between the injection nozzle rows to form a connection flow path connected to the injection hole in the branch flow path, respectively.

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