KR20200012710A - Dishwasher - Google Patents

Abstract

The present invention relates to a dishwasher. According to the present invention, the dishwasher comprises: a tub which defines a washing chamber configured to accommodate washing targets; a plurality of spray nozzles configured to spray washing water into the washing chamber; a sump configured to store the washing water; a steam nozzle configured to supply steam to the washing chamber; a washing pump housing coupled to the sump, forming the appearance, and connected to the plurality of spray nozzles or the steam nozzle; a heater configured to heat the washing water in the washing pump housing; a washing motor configured to rotate an impeller causing the flow of the washing water in the washing pump housing or steam generated by the heater; a washing water outflow pipe formed by protruding outward from one side of the circumferential surface of the washing pump housing, and defining an outflow path supplying the washing water or steam in the washing pump housing to the plurality of spray nozzles; a steam discharge pipe which forms a discharge port in one side of the circumferential surface of the washing water outflow pipe, protrudes to the outside of the washing water outflow pipe from the circumferential surface of the washing water outflow pipe in which the discharge port is formed, and supplies the steam flowing in the outflow path to the steam nozzle; and a first protrusion disposed on an upper portion of the outflow path at the downstream of the discharge port in a flow direction of the washing water which flows in the outflow path, and guiding the flowing steam to the discharge port.

Description

Dishwasher {Dishwasher}

The present invention relates to a dishwasher, and more particularly, to a dishwasher for smoothly supplying steam to a steam nozzle.

The dishwasher is an electric appliance that cleans dirt, such as food waste, which is buried in a dish or cooking utensils (hereinafter, 'to be cleaned') by high-pressure washing water sprayed from a spray arm.

The dishwasher generally consists of a tub forming a washing chamber and a sump mounted on the bottom of the tub to store the washing water. Then, the washing water is moved to the injection arm by the pumping action of the washing pump mounted inside the sump, and the washing water moved to the injection arm is sprayed at high pressure through the injection hole formed in the injection arm. Then, the washing water sprayed at a high pressure hit the surface of the washing object, the dirt on the washing object is dropped to the bottom of the tub.

On the other hand, the dishwasher may wash or sterilize the object to be washed using the heated washing water or supply steam to the object to be washed.

U.S. Patent No. 9211049 B2 discloses supplying steam by heating the washing water inside the washing pump, or supplying the washing water with the injection nozzle through the impeller. In the above document, inside the housing in which the heater is disposed, a partition wall is formed upward to form a space in which the washing water and the steam are discharged in the first section or the second section. This structure requires a separate flow forming structure of the wash water to form a flow of wash water or steam.

In addition, in the above structure, when an impeller for washing water flow is disposed in the housing in which the heater is disposed, the washing water flows into a space where steam flows at a pressure formed in the housing, so that the discharge of steam or the discharge of washing water is prevented. There is a problem that cannot be made smoothly.

The first problem to be solved by the present invention is that the flow of the washing water is formed by the impeller, in the washing pump is heated by the heater, the washing water and steam discharged from the washing pump is smoothly supplied into the tub through each nozzle To provide a dishwasher. In particular, in consideration of the characteristics of the washing water and steam, to provide a dishwasher that can smoothly supply steam to the steam nozzle.

In the pipe from which the washing water is discharged, in order to separate the flow of steam, considering that the steam is less dense than the washing water, the pipe discharged from the steam may be formed upward from the pipe from which the washing water is discharged. However, when the flow rate of the washing water and steam is above a certain level, it is difficult to form a flow of steam into the pipe for discharging steam. A second object of the present invention is to solve this problem, and to provide a dishwasher in which steam flows smoothly to a pipe through which steam is discharged by preventing the flow of steam around a pipe through which steam is discharged.

The structure for suppressing the flow of steam around the pipe from which steam is discharged may act as a structure for suppressing the flow of the washing water. A third object of the present invention is to provide a dishwasher which does not disturb the flow of the washing water due to the discharge structure of steam.

Another object of the present invention is to provide a dishwasher having a tightening force with a washing water supply pipe connecting the washing pump and the switching valve.

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.

The dishwasher according to the present invention includes a washing pump for supplying washing water to an injection nozzle disposed on a tub, or for supplying steam to a steam nozzle. The washing pump according to the present invention may heat the washing water through a heater and form a flow of the washing water or a flow of steam through the impeller. The washing pump discharges the washing water or steam to the washing water outlet pipe formed by protruding to the circumferential surface of the washing pump housing. In addition, the washing water outflow pipe in which the washing water and steam flow, in order to separate the flow of steam, in the washing water outflow pipe, it comprises a steam discharge pipe formed upward. The washing water outlet pipe is formed with an outlet flow path through which washing water or steam flows, and an outlet through which steam is discharged.

The dishwasher of the present invention may form a first protrusion that suppresses the flow of steam downstream of the washing water discharge pipe in which the steam discharge pipe is formed, thereby securing the flow of steam with the steam nozzle.

That is, the steam flowing through the washing water outlet pipe, including a first projection disposed above the outlet passage in the direction of the flow of the washing water flowing through the outflow passage to guide the flowing steam to the outlet, to the steam discharge pipe It can be made to flow. In this structure, by forming an air trap which can be introduced into the discharge port downstream of the discharge port, steam can be supplied to the steam nozzle.

Since the steam is less dense than the washing water, the steam flows to the upper portion of the outflow passage, and the first protrusion is formed in a structure having a semicircular convex shape from the upper side of the outlet passage upward, thereby suppressing the flow of steam downstream of the outlet. For example, at a distance adjacent the outlet, steam may form an air trap in which the flow is stagnant.

However, the structure of the first protrusion may interfere with the flow of the washing water flowing through the washing water outlet pipe. Since the outflow flow path formed inside the wash water outlet pipe extends downward toward the downstream from the portion where the outlet is formed, the cross section of the outflow flow path through which the wash water flows is not reduced, and thus does not disturb the flow of the wash water.

In addition, the outflow flow path formed inside the wash water outlet pipe extends downward toward the downstream from the portion in which the outlet is formed, so that the washing water and steam can be separated well because the dense wash water guides the flow downward. .

In addition, the first protrusion may be disposed above the outlet passage at a point where the outlet passage extends downward, thereby limiting the flow of steam flowing upward.

As the diameter of the outflow passage formed inside the wash water outlet pipe moves downstream from the portion where the outlet is formed, the length is greater than the height at which the first protrusion protrudes inward into the outflow oil formed inside the wash water outlet pipe. It is formed in the same way and has a structure that does not disturb the flow of the washing water even when the first projection is formed.

The interval from the outlet to the first protrusion may be smaller than half of the cross-sectional length of the outlet flow path formed inside the wash water outlet pipe.

The dishwasher of the present invention is disposed above the washing water discharge pipe, the switching valve for sending the washing water discharged from the washing pump to at least one of the plurality of injection nozzles, the inlet end and the outlet end are formed vertically, the washing water Further comprising a washing water supply pipe connecting the outlet pipe and the switching valve.

The first protrusion may be formed at an inlet end of the washing water supply pipe connected to the washing water outlet pipe, and the first protrusion may be disposed at the washing water supply pipe connected to the washing water outlet pipe.

The steam discharge pipe is formed in an inclined direction toward the upper side of the circumferential surface of the wash water discharge pipe from the upper portion of the wash water discharge pipe, and has a structure in which steam having a specific gravity smaller than that of the wash water flows easily.

The height of the first protrusion protruding downward from the upper end of the outlet flow passage may be longer than the length of the center of the outlet opening spaced apart from the upper side of the outlet flow passage, thereby forming an air trap around the outlet opening.

The first protrusion includes a front surface which forms a slope to face the washing water flowing in the outflow flow path formed inside the wash water discharge pipe, and a rear surface which forms a slope opposite to the front surface downstream from the front surface. The inclination angle formed with the imaginary horizontal line formed along the upper end of the washing water outlet pipe is formed to be gentler than the inclination angle formed by the rear surface with the horizontal line, so that the first protrusion does not interfere with the flow of the washing water.

The outlet end of the wash water supply pipe connected to the switching valve is formed to be opened upward, the inlet end of the wash water supply pipe connected to the wash water outlet pipe is formed with an opening perpendicular to the outlet end, the first projection is the It may be formed from the inlet end to the portion where the flow path is changed vertically.

The washing water supply pipe is formed between the outer circumferential surface and the first projection is formed with an insertion groove into which the washing water outlet pipe is inserted, the fastening structure of the washing water supply pipe and the washing water outlet pipe can be strengthened.

The outflow passage formed inside the wash water outlet pipe is provided with a second protrusion protruding inwardly into the outflow oil to prevent the washing water flowing out of the washing pump housing from flowing into the outlet, thereby restricting the flow of the wash water to the steam outlet pipe. Can be.

The second protrusion may be formed in an upstream side of the discharge port in an outflow passage formed in the wash water discharge pipe, thereby restricting the flow of the wash water to the steam discharge pipe.

An outlet formed in the washing water outlet pipe may be disposed between the first protrusion and the second protrusion to form an air trap around the outlet.

The washing water supply pipe is specifically, a horizontal pipe part connected to the washing water outlet pipe, a vertical pipe part connected to the switching valve and formed perpendicular to the horizontal pipe part, and a bending pipe part connecting the horizontal pipe part and the vertical pipe part. Include. Here, the first protrusion is formed in the horizontal pipe portion and the bending pipe portion, it is possible to suppress the flow of steam at the end of the flow path flowing horizontally.

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

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

First, in the structure of discharging the washing water and steam through a single washing water discharge pipe in the washing pump, the steam discharge pipe is formed on the upper side of the washing water discharge pipe, the steam nozzle and the washing water discharged from the washing pump There is an advantage that can be supplied separately to each and the injection nozzle. That is, in consideration of the characteristics of the steam flowing upward of the washing water, the steam may be supplied through the steam nozzle, and the washing water may be smoothly supplied into the tub through the spray nozzle.

In addition, in the present invention, the first projection is disposed downstream of the outlet of the steam discharge pipe is formed, there is an advantage that the supply of steam to the steam nozzle by limiting the flow of the steam flowing upwards around the outlet.

Second, the outlet flow path of the washing water outlet pipe is extended to the lower side at the point where the discharge port is formed, the first projection is formed with a small inclination angle of the front facing the flowing washing water, so that the steam does not interfere with the flow of the washing water It also has the advantage of good flow to the outlet.

Third, a second projection is installed upstream of the discharge port of the steam discharge pipe to restrict the flow of the washing water to the steam discharge pipe, and at the same time, the first projection and the second projection form an air trap around the discharge port, whereby steam supply to the discharge port becomes active. There are also advantages.

Fourth, an insertion groove is formed between the outer circumferential surface and the first protrusion in the steam supply pipe in which the first protrusion is formed, and the washing water outlet pipe is inserted into the insertion groove, thereby strengthening the coupling structure between the washing water outlet pipe and the washing water supply pipe. There is an advantage.

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 cross-sectional view for explaining the overall configuration of a dish washer according to an embodiment of the present invention.
Figure 2 is a schematic cross-sectional view for explaining the configuration of the washing pump of the dishwasher according to an embodiment of the present invention.
3 is a perspective view of a washing pump according to an embodiment of the present invention.
Figure 4 is a block diagram illustrating the flow of the washing water and steam flowing in the dishwasher according to an embodiment of the present invention.
5 is a view illustrating a sump, a switching valve, and a steam nozzle connected to a washing pump according to an embodiment of the present invention.
6 is a view for explaining the configuration and arrangement of the washing pump and the washing water supply pipe according to an embodiment of the present invention.
Figure 7 is a cross-sectional view for explaining the internal configuration and arrangement of the wash water outflow pipe and the wash water supply pipe according to an embodiment of the present invention.
Figure 8a is a perspective view of the washing water outflow pipe of the washing pump according to an embodiment of the present invention.
Figure 8b is a front view of the washing water outflow pipe of the washing pump according to an embodiment of the present invention.
Figure 9a is a perspective view of the washing water supply pipe according to an embodiment of the present invention.
9B is a front view of the washing water supply pipe according to an embodiment of the present invention.
Figure 9c is a cross-sectional view of the washing water supply pipe according to an 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 in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and those of ordinary skill 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, a dishwasher according to embodiments of the present invention will be described with reference to the drawings.

<Overall Configuration>

The dishwasher 10 according to the present exemplary embodiment includes a tub 12 and a tub 16 that form a case 12 that forms an exterior and a washing chamber 16a that is provided inside the case 12 to accommodate a washing object. It is provided on the front of the door 14 for opening and closing the washing chamber (16a), disposed on the lower side of the tub 16 includes a sump (40) for storing the wash water.

In the sump 40 according to the present embodiment, a filter 42 for filtering the washing water introduced from the external water or the tub 16 may be disposed.

The dishwasher 10 according to the present embodiment includes a plurality of spray nozzles 20, 22, and 24 spraying the washing water into the washing chamber 16a in the tub 16, and a plurality of spray nozzles of the washing water stored in the sump 40. Washing pump 60 to be supplied to the (20, 22, 24), the switching valve 59 and the tub 16 to connect the washing water supplied from the washing pump 60 to at least one of the plurality of injection nozzles It includes a rack (30a, 30b) for mounting.

The racks 30a and 30b according to the present exemplary embodiment have a structure in which a washing object is mounted to wash the washing object with the washing water sprayed by the plurality of spray nozzles 20, 22 and 24, and inside the washing chamber 16a. It may include an upper rack (30a) disposed on the upper side and a lower rack (30b) disposed on the lower side based on the position disposed in the.

The plurality of injection nozzles 20, 22, 24 may be disposed in the vertical direction. The plurality of injection nozzles 20, 22, and 24 according to the present embodiment are disposed at the bottom and are the lower part nozzles 20, the upper rack 30a, and the lower part which spray the washing water from the lower side to the upper side toward the lower rack 30b. It is disposed between the rack 30b, the upper injection nozzle 22 for spraying the washing water to the upper rack or lower rack (30b) and the upper rack (30a) and the upper side of the washing chamber (16a) of the upper rack (30a) It is arranged to include a top spray nozzle 24 for spraying the washing water into the space of the washing chamber (16a). The plurality of injection nozzles 20, 22, 24 may be supplied with the washing water from the washing pump 60 through the plurality of injection nozzle connecting pipes 20a, 22a, 24a.

The switching valve 59 may selectively supply the washing water pumped by the washing pump 60 to at least one of the lower part nozzle 20, the upper injection nozzle 22, and the top injection nozzle 24. The switching valve 59 may selectively connect at least one of the washing water supply pipe 100 through which the washing water discharged from the washing pump 60 flows and the plurality of injection nozzle connecting tubes 20a, 22a, and 24a.

The washing pump 60 may be connected to the sump 40 and the collecting pipe 54 formed with the collecting flow path. A check valve 56 may be disposed at the inlet of the sump pipe 54 or the washing pump 60 to open and close the sump 40 and the washing pump 60.

The check valve 56 according to the present embodiment may be opened when the washing pump 60 operates to flow the washing water, and may be closed when the washing pump 60 is stopped to prevent the washing water from flowing. The check valve 56 may be opened by the flow pressure of the washing water of the washing pump 60. However, the check valve according to one embodiment, the check valve 56 may be configured as a solenoid valve that is opened and closed by an electronic signal.

The dishwasher 10 according to the present embodiment may include a water supply assembly for supplying washing water into the dishwasher and a drainage assembly for draining the water stored in the dishwasher. The water supply assembly according to the present embodiment includes a water supply pipe 44 for forming a water supply flow path through which the washing water is supplied from an external water source, a water supply valve 46 for opening and closing the water supply flow path formed in the water supply pipe 44, and a sump through the water supply flow path. It may include a flow meter 48 for measuring the flow rate of the washing water flowing to 40.

The drainage assembly according to the present embodiment is disposed on the drainage pipe 50 formed with a drainage flow path for guiding water stored in the sump 40 to the outside, and the drainage flow path formed in the drainage pipe 50 to wash the water in the sump 40. It may be provided with a drain pump 52 for draining to the outside. The drain pump 52 may include a drain motor (not shown) for generating a rotational force.

<Wash pump>

The washing pump 60 according to the present embodiment may supply the water stored in the sump 40 to the plurality of injection nozzles 20, 22, 24, or generate steam and send the steam to the steam nozzle 32. The washing pump 60 according to the present embodiment is connected to the sump 40 through the collecting pipe 54. The washing pump 60 according to the present embodiment may be connected to the switching valve 59 and the injection nozzle through the washing water supply pipe 100, and may be connected to the steam nozzle 32 through the steam supply pipe 88.

The washing pump 60 according to an embodiment of the present invention is coupled to the sump 40 and the washing pump housing 62 forming an outer shape, and disposed inside the washing pump housing 62, the washing pump housing 62. Heater 70 to generate steam by heating the washing water in the impeller 80, the washing motor 78 for rotating the impeller 80, and the washing pump housing 62 to form a flow of washing water or steam disposed therein) ).

In the washing pump housing 62 according to the present embodiment, the washing water inlet pipe 86 forming an inlet so that the washing water of the sump 40 is introduced into the washing pump housing 62 by the rotation of the impeller 80, and the impeller ( 80 is disposed in the washing water outlet pipe 110 and the washing water outlet pipe 110 to form an outlet so that the washing water in the washing pump housing 62 is supplied to the plurality of injection nozzles 20, 22, and 24 by rotation of 80. A steam discharge pipe 82 may be disposed to form an outlet 112 through which steam generated by the heater 70 is discharged.

The washing water inlet pipe 86 may be disposed under the circumferential surface of the washing pump housing 62, and the washing water outlet pipe 110 may be disposed above the circumferential surface of the washing pump housing 62. The washing water outlet pipe 110 according to the present embodiment forms an outflow passage 110a formed in a horizontal direction therein.

The cleaning pump housing 62 may be formed in a cylindrical shape with open top and bottom surfaces. The housing cover 64 is coupled to the upper end of the cleaning pump housing 62, and the heater 70 is coupled to the lower end. The housing cover 64 may cover the open upper portion of the washing pump housing 62. A cleaning motor 78 may be disposed at an upper side of the housing cover 64 to generate a rotational force to rotate the impeller 80.

Inside the cleaning pump housing 62, a partition 66 is disposed to vertically divide the internal space of the cleaning pump housing 62. The partition 66 according to the present embodiment may be disposed below the impeller 80. The partition 66 may be disposed above the wash water inlet pipe 86 and be disposed below the wash water outlet pipe 110. The partition 66 may divide the inside of the washing pump housing 62 into a lower chamber C1 and an upper chamber C2. The lower chamber C1 is where negative pressure is generated by the rotation of the impeller 80, and the upper chamber C2 is where positive pressure is generated by the rotation of the impeller 80.

The lower chamber C1 is connected to the sump 40 through the washing water inlet pipe 86. The upper chamber C2 is connected to the switching valve 59 through the washing water outlet pipe 110 and the washing water supply pipe 100. The steam discharge pipe 82 formed at one side of the washing water discharge pipe 110 may be connected to the steam nozzle 32 through the steam supply pipe 88.

The washing pump 60 is a pump lower portion 60a through which the washing water is introduced by the rotation of the impeller 80 based on the partition 66, and an upper portion of the pump 60b through which the washing water is discharged by the rotation of the impeller 80. Can be distinguished.

The lower chamber C1 is formed inside the pump lower portion 60a, and the upper chamber C2 is formed inside the pump upper portion 60b. The washing water inflow pipe 86 and the heater 70 are disposed in the pump lower portion 60a. The washing water outlet pipe 110 and the steam discharge pipe 82 is disposed in the pump upper portion (60b). The housing cover 64 is disposed on the pump upper portion 60b. The impeller 80 is disposed in the washing pump housing 62 and the washing motor 78 is disposed above the washing pump housing 62.

The partition 66 has a partition hole 66a for communicating the lower chamber C1 and the upper chamber C2. The upper side surface of the partition 66 may be formed in a vortex, and the washing water introduced into the upper chamber C2 through the partition hole 66a from the lower chamber C1 may be guided to the washing water outlet pipe 110. . A lower side of the partition 66 may be formed with a guider (not shown) protruding downward. The guider of the partition 66 may guide the washing water introduced into the lower chamber C1 through the washing water inlet pipe 86 to the partition hole 66a. The guider of the partition 66 allows the washing water in the lower chamber C1 to be evenly heated by the heater 70.

The impeller 80 may rotate by the washing motor 78 to flow washing water or steam in the washing pump housing 62 to discharge to the outside. The impeller 80 is rotatably disposed in the upper chamber C2. The impeller 80 may transfer the washing water or steam introduced from the lower chamber C1 to the upper chamber C2 through the partition hole 66a to the washing water outlet pipe 110 or the steam discharge pipe 82.

The washing water inlet pipe 86 is connected to the lower chamber C1 side of the washing pump housing 62. The washing water inlet pipe 86 is connected to the collecting pipe 54 so that the washing water of the sump 40 may be introduced into the lower chamber C1. The washing water inlet pipe 86 is arranged to protrude from the lower surface of the circumference of the washing pump housing 62.

The washing water outlet pipe 110 is connected to the upper chamber C2 side of the washing pump housing 62. The washing water outlet pipe 110 may be connected to the washing water supply pipe 100 so that the washing water of the upper chamber C2 may flow into the washing water supply pipe 100. The washing water outlet pipe 110 is disposed to protrude outward from the upper circumferential surface of the washing pump housing 62.

The steam discharge pipe 82 is connected to the upper chamber C2 side of the cleaning pump housing 62. The steam discharge pipe 82 may be disposed at various positions of the cleaning pump housing 62 so as to connect the upper chamber C2 of the cleaning pump housing 62 and the steam supply pipe 88. In this embodiment, the steam discharge pipe 82 is disposed in the wash water discharge pipe (110). The steam discharge pipe 82 according to the present embodiment is disposed to be inclined in the pipe direction so that the steam discharge direction is inclined upward. The steam discharge direction of the steam discharge pipe 82 may be formed perpendicular to the washing water discharge direction of the wash water discharge pipe (110).

The steam discharge pipe 82 discharges steam or high temperature wash water generated in the washing pump housing 62 by the heater 70 to the steam supply pipe 88. The steam supply pipe 88 is connected to the upper chamber C2 through the steam discharge pipe 82.

The heater 70 is connected to the bottom of the washing pump housing 62 to form the bottom surface of the washing pump housing 62. The heater 70 may heat the washing water flowing in the washing pump housing 62 to generate a high temperature washhouse or steam. When the heater 70 of the heater 70 heats the washing water inside the washing pump housing 62, the impeller 80 may rotate or stop. The heater 70 is disposed below the washing water inlet pipe 86. The heater 70 is disposed below the partition wall 66. A part of the heater 70 is disposed inside the washing pump housing 62.

Check valve 56 according to the present embodiment is disposed in the wash water inlet pipe (86). Check valve 56 is the upper end is coupled to the upper end of the wash water inlet pipe (86). The check valve 56 may open when the impeller 80 rotates and may close when the impeller 80 does not rotate. The check valve 56 may be opened upon operation of the washing motor 78 and closed when the washing motor 78 is stopped. The check valve 56 is closed when steam is generated in the heater 70 so that steam generated in the washing pump housing 62 does not flow out to the sump 40 through the lower chamber C1 and the washing water inlet pipe 86. .

The check valve 56 may be formed such that the washing water flows from the washing pump 60 to the sump 40 during the operation of the drain pump 52. The check valve 56 may be formed so that the lower part of the washing water inlet pipe 86 is opened when the check valve 56 is closed. The check valve 56 is formed to block 50% to 90% of the cross-sectional area of the wash water inlet pipe 86 when closed, and is preferably formed to block 70% of the cross-sectional area of the wash water inlet pipe 86.

The check valve 56 may be closed so that the washing water and steam do not flow from the washing pump 60 to the sump 40 when steam of the heater 70 is generated. However, the check valve 56 may be opened by the flow pressure of the washing water when the impeller 80 rotates when the steam of the heater 70 is generated.

When the drain pump 52 and the washing motor 78 are stopped (not operated), the check valve 56 stores the washing water in the washing pump housing 62.

Heater 70 according to an embodiment of the present invention, the heater cover 72 to form the bottom surface of the washing pump housing 62, and is bonded to the lower side of the heater cover 72 to heat the heater cover 72. The heater plate 74 may include a heater plate 76 bonded to the lower side of the heater cover 72 to transfer the heat generated by the heat generator 74 to the heater cover 72. Unlike the present embodiment, the heater plate 76 may be disposed below the heater.

The heater 70 according to the present embodiment supplies a power to the heating element 74 and adjusts the temperature of the heater 70 (not shown), and a wire electrically connecting the heating element 74 and the thermostat ( Not shown) and a heater shield (not shown) covering a portion of the heater plate 76 from the lower side may be further included.

The dishwasher 10 according to the present embodiment is disposed in the steam supply pipe 88 connecting the steam nozzle 32 and the washing pump 60 and the steam supply pipe 88, and outflow of the washing water exceeding the first set pressure. And a selector valve 90 to allow discharge of the washing water or steam below the second set pressure.

<Washing water and steam flow passage>

The washing water flowing in the dishwasher according to the present embodiment flows the sump 40 and the tub 16 and may wash the washing object. In addition, the wash water stored in the sump 40 may be supplied from an external water source through the water supply assembly, and may be discharged to the outside through the drainage assembly.

The washing water stored in the sump 40 may flow into the tub 16 by rotating the impeller 80 of the washing motor 78 of the washing pump 60. That is, by the operation of the washing motor 78, the washing water in the sump 40 is introduced into the washing pump 60, and is pumped from the washing pump 60 to the switching valve 59, a plurality of injection nozzles (20) At least one of 22, 24 may also flow.

The washing water stored in the sump 40 is introduced into the washing pump housing 62 through the washing water inlet pipe 86 formed in the washing pump housing 62 of the washing pump 60. In addition, it may flow to the switching valve 59 outside the washing pump housing 62 through the washing water outlet pipe 110 formed in the washing pump housing 62.

The sump 40 and the washing pump 60 are connected through the collecting pipe 54, and the washing pump 60 and the switching valve 59 are connected through the washing water supply pipe 100. The switching valve 59 may be connected to the plurality of injection nozzles 20, 22, and 24 through the respective connecting pipes 20a, 22a, and 24a, and the switching valve 59 may be flushed by the washing pump 60. Is supplied to at least one injection nozzle.

The washing water injected into the tub 16 through the injection nozzle may be introduced into the sump 40 through a hole formed in the bottom 16b of the tub 16.

Steam flowing in the dishwasher according to this embodiment is generated in the washing pump (60). By operating the heater 70, the washing water present in the washing pump housing 62 of the washing pump 60 may be generated as steam. In this case, it is preferable to minimize the flow of the washing water inside the washing pump (60). Therefore, it is preferable to stop the operation of the washing motor 78, or to rotate the impeller 80 at a set rotation speed or less.

Steam generated in the washing pump 60 may flow to the steam discharge pipe 82 formed on one side of the washing water discharge pipe (110).

Steam generated in the washing pump 60 may flow through the sump 40 through the washing water inlet pipe (86). However, the washing water inlet pipe 86 according to the present embodiment is disposed under the circumferential surface of the housing, and the washing water outlet pipe 110 is disposed above the circumferential surface of the housing, and the steam generated by the washing pump 60 is Most of the water can be discharged to the discharge pipe (110).

Steam generated in the washing pump 60 may be supplied to the plurality of injection nozzles through the washing water outlet pipe (110). Since the steam discharge pipe 82 is disposed at one side of the washing water discharge pipe 110, steam may be discharged to each of the injection nozzles, and the switching valve 59 is disposed at the top of the washing chamber 16a so as to minimize this. It can be connected to the injection nozzle (24). In the case of the flow path tube 24c connected to the top spray nozzle 24, the flow path is long and the cross section of the flow path is narrow, so that the flow path resistance is larger than that of the other flow path tubes 24a and 24b. Steam generated in may flow to the steam discharge pipe (82).

The steam discharge pipe 82 may be connected to the steam nozzle 32 through the steam supply pipe 88. In the steam supply pipe 88 according to the present embodiment, a selector valve 90 may be disposed to block the flow of the washing water above the set pressure and to allow the discharge of the washing water or steam below the set pressure.

The selector valve 90 according to the present embodiment may be opened and closed based on the rotation speed of the impeller 80 rotating by the washing motor 78. That is, the selector valve 90 may be closed when the impeller 80 rotates above the set rotation speed, and the selector valve 90 may be opened when the impeller 80 rotates below the set rotation speed. Therefore, even when the washing motor 78 is not operated, the selector valve 90 remains open.

The selector valve 90 according to the present embodiment may be opened or closed depending on the position of the valve ball 98 therein. That is, the selector valve 90 according to the present embodiment is disposed lower than the outlet through which the steam or wash water is discharged, and the valve ball 98 moves up and down inside the selector valve 90. The steam supply pipe 88 may be opened and closed.

The selector valve 90 according to the present exemplary embodiment includes a valve body 92 having a valve flow path 92a formed therein, a valve body 92 disposed inside the valve body 92, moving inside the valve flow path 92a, and closing the valve flow path. And a plurality of valve ribs 99 protruding radially from the inner surface of the valve body 92 so that the valve ball 98 is seated inside the inlet side. The valve rib 99 is formed at the lower end of the valve flow path 92a so that steam or washing water may flow into the valve flow path 92a even when the valve ball 98 is seated.

That is, when the washing water of more than the set pressure flows into the valve body 92, the valve ball 98 is disposed on the upper end of the valve flow path 92a, thereby closing the valve flow path 92a. In addition, when the washing water of less than the set pressure flows into the valve body 92, the valve ball 98 is seated in the valve rib 99, or disposed between the upper end and the lower end of the valve flow path (92a), the valve flow path Do not close the 92a.

Therefore, when the impeller 80 rotates above the set rotation speed, the selector valve 90 is closed, and the washing water pumped from the washing pump 60 is supplied to the plurality of injection nozzles 20, 22, 24. In addition, when the impeller 80 rotates below the set rotation speed, the selector valve 90 is opened, and the steam generated in the washing pump 60 may be supplied to the steam nozzle 32.

However, since the steam discharge pipe 82 is formed by being branched from the wash water discharge pipe 110, the steam generated in the washing pump 60 is supplied to the steam nozzle 32 along the steam discharge pipe 82, in addition to the wash water discharge pipe. While flowing along the 110 may be supplied to at least one of the plurality of injection nozzles (20, 22, 24).

Hereinafter, to maximize the flow of the steam generated in the washing pump 60 to the steam discharge pipe 82, to minimize the steam flowing to the washing water supply pipe 100 through the washing water outlet pipe 110 ( 110), the structure and arrangement of the steam discharge pipe 82 and the washing water supply pipe 100 will be described.

<Configuration and arrangement of flushing water outlet pipe, steam discharge pipe, and washing water supply pipe>

The steam discharge pipe 82 according to the present embodiment forms an outlet 112 at the outer circumferential surface of the wash water discharge pipe 110 and protrudes perpendicularly to the outer circumferential surface 111 of the wash water discharge pipe 110. The steam discharge pipe 82 according to the present embodiment forms an outlet 112 communicating with the outside at one side of the circumferential surface 111 of the washing water discharge pipe 110. The steam discharge pipe 82 according to the present embodiment protrudes outward from the circumferential surface 111 of the washing water discharge pipe 110 in which the discharge port 112 is formed.

The steam discharge pipe 82 is formed in a direction inclined to the upper side of the circumferential surface of the wash water discharge pipe 110. When the washing water outlet pipe 110 is divided into an upper side and an upper side under the virtual center line CL passing through the height of half of the cross section, the steam discharge pipe 82 is disposed above the washing water discharge pipe 110. . That is, the steam discharge pipe 82 is formed on the surface facing upward from the circumferential surface 111 of the washing water discharge pipe 110 in which the outlet flow path 110a is horizontally formed. That is, the steam discharge pipe 82 is formed at a position of more than half of the length formed up and down of the wash water discharge pipe (110).

In the case of steam generated in the washing pump housing 62, the specific gravity is smaller than that of the washing water, and when the washing water outlet pipe 110 moves, the steam flows upward of the outlet passage 110a. Silver may be formed on the upper side of the circumferential surface of the washing water outlet pipe (110).

Inside the washing water outlet pipe 110 according to the present embodiment, a second protrusion 114 is disposed to prevent the washing water flowing through the outlet passage 110a from flowing into the steam discharge pipe 82. The second protrusion 114 protrudes into the washing water outlet pipe 110 around the outlet 112. The second protrusion 114 is formed at an upstream side of the washing water outlet pipe 110 at the outlet 112.

The second protrusion 114 may cover the flow of the washing water flowing by the impeller 80 from the washing pump 60 to the outlet 112. In addition, the second protrusion 114 is formed to protrude inward from the upstream and downstream of the washing water outlet pipe 110, based on the first protrusion 108 and the outlet 112, which will be described below. It is possible to form an air trap to suppress the flow of steam.

The outlet flow path 110a formed in the washing water outlet pipe 110 according to the present embodiment may include an expansion part 110b in which a flow path is extended at a point where the outlet 112 is formed. The outlet flow path 110a formed in the washing water outlet pipe 110 according to the present exemplary embodiment may have a lower portion extended downward from a point where the outlet 112 is formed.

An end of the washing water outlet pipe 110 according to the present embodiment may include a fastening part 110c inserted into the washing water supply pipe 100. The fastening part 110c is inserted into the washing water supply pipe 100 to connect the washing water outlet pipe 110 and the washing water supply pipe 100. The upper portion of the fastening part 110c is inserted into the insertion groove 109 formed between the outer circumferential surface 100b of the washing water supply pipe 100 and the first protrusion 108.

The lower side of the washing water outlet pipe 110 according to the present embodiment may further include a stopper 116 for limiting the length of the washing water outlet pipe 110 is inserted into the washing water supply pipe 100. The stopper 116 according to the present embodiment protrudes outward from the circumferential surface of the wash water discharge pipe 110 at the lower side of the circumferential surface of the wash water discharge pipe 110. The stopper 116 according to the present embodiment may be formed between the expansion part 110b and the fastening part 110c of the washing water outlet pipe 110.

The outflow passage 110a formed inside the washing water outlet pipe 110 may increase in cross-section size toward the downstream from a portion where the outlet 112 connected to the steam supply pipe 88 is formed. The outflow passage 110a formed in the washing water outlet pipe 110 may increase the cross-sectional area of the flow passage in a section in which the expansion portion 110b is formed.

The outflow passage 110a formed in the washing water outlet pipe 110 reduces the cross-sectional area of the flow passage in a section in which the first protrusion 108 is disposed. The outflow passage 110a formed in the washing water outlet pipe 110 may reduce the cross-sectional area of the flow passage in a section in which the fastening portion 110c is formed.

The height H1 at which the first protrusion 108 protrudes into the outflow passage 110a formed inside the wash water outlet pipe 110 has an extension 110b formed in the inside of the wash water outlet pipe 110. 110a) may be formed to be smaller than or equal to the length (H3) of the cross section extending downward. The height H1 at which the first protrusion 108 protrudes into the outflow passage 110a formed in the washing water outlet pipe 110 has a second outlet 114 formed at the washing water outlet pipe 110. It is formed larger than the height (H2) protruding from the outflow passage (110a) inside.

The wash water supply pipe 100 according to the present embodiment connects the switch valve 59 disposed on the upper side and the wash water outlet pipe 110 disposed on the side surface. The washing water supply pipe 100 has a direction in which the inlet end 101a faces and a direction in which the outlet end 101b faces.

Washing water supply pipe 100 according to the present embodiment is a vertical pipe portion 104 is connected to the horizontal pipe portion 102, the switching valve 59 is connected to the washing water outlet pipe 110, and formed perpendicular to the horizontal pipe portion 102 And a bending pipe part 106 connecting the horizontal pipe part 102 and the vertical pipe part 104. The vertical pipe portion forms a flow path in an upward direction and is fastened to the switching valve 59. The horizontal pipe part 102 forms a flow path in a direction perpendicular to the upper direction in which the vertical pipe part 104 forms a flow path, and is fastened to the washing water outlet pipe 110.

An end of the switching valve 59 may be fastened to the wash water supply pipe 100 in a manner that the switch valve 59 is inserted into the vertical pipe part 104. An end of the wash water outlet pipe 110 may be fastened to the wash water supply pipe 100 in a manner that the end of the wash water outlet pipe 110 is inserted into the horizontal pipe part 102.

The washing water outlet pipe 110 extending from the washing pump housing 62 may be formed of a plastic material having a fixed shape and being moldable by heating and / or pressing. The washing water supply pipe 100 may be formed of a rubber-like polymer material having a chain-like polymer material exhibiting rubbery elasticity at room temperature or a polymer material used as a raw material thereof.

The washing water supply pipe 100 and the washing water outlet pipe 110 may be coupled to each other by the end of the washing water supply pipe 100 surrounding the end of the washing water outlet pipe 110. When the end of the washing water supply pipe 100 is coupled to the structure surrounding the end of the washing water outlet pipe 110, a clamp (not shown) may be disposed on the outer circumference of the washing water supply pipe (100). The clamp is disposed at the outer circumference of the washing water supply pipe 100, and presses the washing water supply pipe 100 toward the washing water outlet pipe 110. The clamp strengthens the fastening force of the washing water outlet pipe 110 and the washing water supply pipe 100.

The washing water supply pipe 100 according to the present exemplary embodiment includes a first protrusion 108 protruding from the upper side to the inner side and covering the upper side of the flow path. The first protrusion 108 protrudes inward from the upper side of the flow path formed by the horizontal pipe portion 102. The first protrusion 108 may be disposed downstream of the outlet 112 of the steam outlet pipe 82 to form an air trap around the outlet 112 for steam flowing through the washing water outlet pipe 110.

The first protrusion 108 has a front surface 108a which is inclined to face the washing water flowing in the outflow passage 110a formed in the washing water outlet pipe 110, and the front surface 108a downstream from the front surface 108a. The reverse side may include a rear surface 108b that forms a slope. The front surface 108a may have a gentle inclination angle θ1 formed with an imaginary horizontal line HL formed along the upper end of the washing water outlet pipe 110 than the inclination angle θ2 formed by the rear surface 108b. Thus, the first protrusion 108 may limit the flow of steam without disturbing the flow of the washing water to the maximum.

The first protrusion 108 is disposed at the end of the outflow passage 110a formed in the wash water outlet pipe 110. The first protrusion 108 is formed at the point where the expansion portion 110b at which the outflow passage 110a extends downward ends.

The interval H4 from the outlet 112 to the first protrusion 108 may be smaller than half of the cross-sectional length D1 of the outlet flow path 110a formed in the washing water outlet pipe 110. The height H1 of the first protrusion 108 protruding downward from the upper end of the outlet passage 110a is greater than the length H5 of the center HC of the outlet 112 spaced apart from the inner upper end of the outlet passage 110a. It may be formed long.

An insertion groove 109 is formed between the outer circumferential surface 100b formed by the horizontal pipe portion 102 and the first protrusion 108 to insert the washing water outlet pipe 110. An end of the washing water outlet pipe 110 may be inserted into the insertion groove 109 to be coupled to the washing water supply pipe 100.

Although the above has been illustrated and described with respect to the preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the technical field to which the invention belongs without departing from the spirit of the invention 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.

10 dishwasher 12 cabinet
16: Tub 16a: Washing Room
20: lower part nozzle 22: upper part injection nozzle
24: Top spray nozzle 32: Steam nozzle
40: sump 54: water pipe
56: check valve 59: switching valve
60: cleaning pump 62: housing
64 housing cover 66 partition wall
70: heater 78: cleaning motor
82: steam discharge pipe 86: steam inlet pipe
88: steam supply pipe 90: selector valve
100: washing water supply pipe 100a: washing water supply passage
100b: outer peripheral surface 102: horizontal pipe
104: vertical pipe portion 106: banding pipe portion
108: first projection 108a: front
108b: Rear side 109: Insertion groove
110: washing water outflow pipe 110a: outflow passage
114: second projection 116: stopper

Claims (19)

A tub forming a washing chamber in which a washing object is accommodated;
A plurality of spray nozzles for spraying washing water into the washing chamber;
Sump in which washing water is stored;
A steam nozzle for supplying steam to the washing chamber;
A cleaning pump housing coupled to the sump, forming an external shape, and connected to the plurality of injection nozzles or the steam nozzle;
A heater for heating the washing water present in the washing pump housing;
A washing motor for rotating an impeller for flowing the washing water present in the washing pump housing or steam generated by the heater;
A washing water outlet pipe which protrudes outward from one side of a circumferential surface of the washing pump housing and forms an outflow passage for sending washing water or steam to the plurality of injection nozzles in the washing pump housing;
A discharge port is formed at one side of the circumferential surface of the washing water discharge pipe, and is formed to protrude out of the washing water discharge pipe at the circumferential surface of the washing water discharge pipe in which the discharge port is formed, and sends steam flowing through the discharge flow path to the steam nozzle. Steam discharge pipe; And
And a first protrusion disposed above the outlet passage in a flow direction of the washing water flowing through the outlet passage and configured to guide the flowing steam to the outlet. The method of claim 1,
The first protrusion has a semi-circular shape convex upward from the upper side of the outflow passage. The method of claim 1,
The outflow passage, the dishwasher which extends downward toward the outflow passage downstream in the flow direction of the washing water in the portion where the outlet is formed The method of claim 3, wherein
The first protrusion is disposed in the upper side of the outflow channel at the point where the outflow passage is extended downward. The method of claim 3, wherein
As the diameter of the outflow passage formed inside the wash water outlet pipe moves downstream from the portion where the outlet is formed, the length of the outflow passage is larger than the height at which the first protrusion protrudes inward into the outflow oil formed inside the wash water outlet pipe. Dishwasher shaped equally. The method of claim 1,
And a distance from the outlet to the first protrusion is smaller than half of the cross-sectional length of the outflow passage formed in the wash water outlet pipe. The method of claim 1,
A switching valve disposed at an upper side of the washing water outlet pipe and configured to send washing water discharged from the washing pump to at least one of the plurality of injection nozzles;
Inlet and outlet end is formed vertically, and further comprises a washing water supply pipe for connecting the washing water outlet pipe and the switching valve,
And the first protrusion is formed at an inlet end of the washing water supply pipe connected to the washing water outlet pipe. The method of claim 1,
The steam discharge pipe is a dish washer formed in the direction inclined to the upper side of the circumferential surface of the wash water discharge pipe from the upper portion of the wash water discharge pipe. The method of claim 1,
And a height at which the first protrusion protrudes downward from an upper end of the outlet flow passage is longer than a length of a center of the discharge port spaced downward from an upper end of the outlet flow passage. The method of claim 1,
The first projection includes a front surface to form a slope to face the washing water flowing in the outflow flow path formed inside the wash water outflow pipe, and a rear surface to form a slope to the front surface downstream from the front surface,
The front side of the dishwasher is formed with an inclined angle formed with an imaginary horizontal line formed along the upper end of the washing water outflow pipe is gentler than the inclined angle formed by the rear surface. The method of claim 7, wherein
The outlet end of the washing water supply pipe connected to the switching valve is formed to be opened upwards,
The inlet end of the washing water supply pipe connected to the washing water outlet pipe has an opening perpendicular to the outlet end,
The first protrusion is a dish washing machine is formed from the inlet end to the portion where the flow path is changed vertically. The method of claim 7, wherein
The washing water supply pipe is a dish washer is formed between the outer circumferential surface and the first projection is inserted groove into which the washing water discharge pipe is inserted. The method of claim 1,
And a second protrusion protruding inwardly of the outflow channel to prevent the outflow of the wash water flowing out of the wash pump housing into the outlet. The method of claim 13,
And the second protrusion is formed in an upstream side of the outlet in an outflow passage formed in the washing water outlet pipe. The method of claim 13,
Discharge port formed in the washing water outflow pipe is disposed between the first projection and the second projection dishwasher. The method of claim 7, wherein
The washing water supply pipe,
A horizontal pipe part connected to the washing water outlet pipe;
A vertical pipe part connected to the switching valve and formed perpendicular to the horizontal pipe part; And
And a bending pipe part connecting the horizontal pipe part and the vertical pipe part,
The first protrusion is a dish washer formed in the horizontal pipe portion and the bending pipe portion. The method of claim 1,
The wash water outlet pipe is formed of a plastic material,
The washing water supply pipe, dishwasher is formed of a rubber material. The method of claim 7, wherein
The washing water supply pipe, dishwasher coupled to the washing water outflow pipe in a form surrounding the end of the washing water outflow pipe. A tub forming a washing chamber in which washing objects are accommodated;
Sump in which washing water is stored;
At least one spray nozzle for spraying the washing water stored in the sump into the washing chamber;
A washing pump that heats the washing water stored in the sump to generate steam or supplies washing water to the at least one injection nozzle;
A steam nozzle connected to the washing pump and supplying steam generated by the washing pump to the washing chamber;
A washing water supply pipe connected to the washing pump to form a washing water supply passage for supplying the washing water flowing from the washing pump to the at least one injection nozzle,
The washing pump,
A washing pump housing forming an outer shape and forming a space for temporarily storing the washing water supplied from the sump;
A heater for heating the washing water present in the washing pump housing;
An impeller to flow washing water present in the washing pump housing or steam generated by the heater;
A washing motor for rotating the impeller;
A washing water outlet pipe forming an outflow passage through which the washing water flowing by the rotation of the impeller is discharged, and protruding outward from one side of the circumferential surface of the washing pump housing;
The outlet port is formed in an upward direction from one side of the circumferential surface of the wash water outlet pipe, and is formed to protrude outward from the wash water outlet pipe from the circumferential surface of the wash water outlet pipe in which the outlet port is formed, and the steam flowing through the outlet flow path is the steam. It includes a steam discharge pipe to the nozzle,
The washing water supply pipe, the dishwasher including a first projection disposed above the washing water supply flow passage at the end coupled with the washing water discharge pipe.

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