KR20180107697A - Pump and Dishwasher comprising the Same - Google Patents

Abstract

The present invention relates to a pump for transferring washing water and generating steam, and a dishwasher having the same. The dishwasher according to an embodiment of the present invention comprises: a cylindrical housing; a washing water inlet pipe connected to the housing for introducing the washing water; a washing water outlet pipe connected to the housing to discharge the washing water; an impeller disposed in the housing and flowing the washing water introduced into the washing water inlet pipe into the washing water outlet pipe; a heater coupled to the housing to generate the steam by heating the washing water in the housing; a steam discharge pipe through which the steam generated by the heater is discharged; and a selector valve connected to the steam discharge pipe to block discharge of the washing water and allow the discharge of the steam. Therefore, the discharge of the washing water through the steam discharge pipe can be blocked.

Description

[0001] The present invention relates to a pump and a dishwasher including the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pump and a dishwasher including the same, and more particularly to a pump for transferring washing water and generating steam, and a dishwasher including the same.

A dishwasher is a household appliance that removes foreign matter remaining in a tableware by spraying washing water on the tableware. The dishwasher includes a tub for providing a washing space, a rack for accommodating the dishware, a spraying arm for spraying the washing water into the rack, a sump for storing the washing water, and a pump for supplying washing water stored in the sump to the spraying stone .

On the other hand, the dishwasher performs cleaning or sterilization of the tableware by washing the tableware using heated washing water (hot water) or supplying steam to the tableware. Conventional dishwashers generally generate hot water or steam by heating washing water stored in the sump through a heater provided inside the sump. In this case, since the heater must be exposed to the inside of the sump to contact the washing water, the water level inside the sump must be controlled so that the heater is not exposed to prevent the heater from overheating. In addition, since heat transfer is possible only when the heater is in contact with the washing water, foreign matter adheres to the surface of the heater to lower the heat exchange efficiency, and the surface of the heater is corroded and durability is deteriorated.

To overcome these disadvantages, a dishwasher has recently been developed that installs a heater on a pump. In this case, the heater in the pump heats the wash water to generate hot water or steam. However, there has been a problem that the washing water flows out through the flow path for discharging the steam and the pump performance is lowered.

A problem to be solved by the present invention is a pump and a dishwasher which can generate steam but do not deteriorate the performance of the pump.

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

In order to accomplish the above object, according to an embodiment of the present invention, there is provided a dishwasher including: a cylindrical housing; a washing and discharging inlet connected to the housing for receiving washing water; a washing water outlet pipe connected to the housing, An impeller which is disposed inside the housing and flows out of the washing water inflow pipe to the washing water outlet pipe; a heater coupled to the housing and heating the washing water in the housing to generate steam; steam generated by the heater, And a selector valve connected to the discharge pipe and the steam discharge pipe to block the discharge of the wash water and allow the steam to be discharged, thereby preventing the discharge of the wash water through the steam discharge pipe.

The selector valve is closed upon entry of the wash water and may be opened upon entry of steam.

The selector valve may be positioned such that the inlet is lower than the outlet.

The selector valve may include a valve body having a flow path formed therein, a valve seat disposed on an outlet side of the valve body, and a valve ball disposed inside the valve body and contacting the valve seat to close the flow path of the valve body have.

The valve body may have a tubular shape and the tube direction may be inclined upward.

The valve body may be formed with a plurality of valve ribs protruding radially inside the inlet side to seat the valve balls.

The plurality of valve ribs may be disposed apart from each other in the circumferential direction of the valve body.

It is preferable that the diameter of the valve ball is larger than the separation distance of the plurality of valve ribs and smaller than the inner diameter of the valve body.

Sectional area based on the spacing distance of the plurality of valve ribs is preferably smaller than the sectional area of the valve body minus the sectional area of the valve ball.

The selector valve includes a tubular outlet portion projecting horizontally at an upper portion of one side surface of the valve body and a tubular outlet portion projecting horizontally at a lower portion of the other side surface of the valve body. And the like.

The selector valve includes a tubular outlet portion projecting horizontally from one side of the valve body and a tubular outlet portion projecting horizontally from the other side of the other side of the valve body. And may further include an inflow section.

The valve seat may be formed with a slit in the longitudinal direction on the inner circumferential surface on the inlet side.

The valve ball is preferably made of alumina.

The selector valve may be disposed above the steam discharge pipe.

The motor further includes a motor for rotating the impeller, and the selector valve may be disposed above the motor.

According to an aspect of the present invention, there is provided a dishwasher including a tub receiving a dishware, a spray gun for spraying washing water into the tub, a steam nozzle for discharging steam into the tub, A pump for supplying wash water stored in the sump to the spray sand, generating steam to supply steam to the steam nozzle, and a selector valve disposed between the pump and the steam nozzle to block the discharge of the wash water and allow discharge of the steam. have.

The selector valve may be closed by the wash water flow pressure upon entering the wash water from the pump.

The selector valve may be coupled to the sump.

And a supply pipe connecting the sump and the pump, and the selector valve may be disposed above the supply pipe.

The selector valve may be disposed below the steam nozzle.

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

According to the pump of the present invention and the dishwasher including the same, one or more of the following effects can be obtained.

First, there is an advantage in that the discharge of washing water through the steam discharge pipe is prevented by applying a valve that allows discharge of steam to the steam discharge pipe and blocks the discharge of the washing water.

Second, the valve is operated by the flow pressure of the washing water, so that the structure is simple and no separate control is required.

Third, there is an advantage that the steam performance is not deteriorated by optimizing the structure and arrangement of the valve.

Fourth, there is an advantage that steam cross-sectional area inside the valve is secured and steam can pass smoothly.

Fifth, there is an advantage that it is possible to prevent the blocking of the washing water due to the decrease in the flow pressure of the washing water from being released due to the close contact between the valve ball and the valve seat inside the valve.

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

1 is a schematic cross-sectional view of a dishwasher according to an embodiment of the present invention.
2 is an exploded perspective view of a pump according to an embodiment of the present invention.
3 is a schematic cross-sectional view of a pump according to an embodiment of the present invention.
4 is an exploded perspective view of a selector valve of a dishwasher according to an embodiment of the present invention.
5 is a view illustrating an operation of a selector valve of a dishwasher according to an embodiment of the present invention.
6 is a perspective view of a valve seat of a selector valve of a dishwasher according to an embodiment of the present invention.
7 is a sectional view of a valve seat of a selector valve of a dishwasher according to an embodiment of the present invention.
8 is a partial perspective view of a dishwasher according to an embodiment of the present invention.
9 is a sectional view of a selector valve of a dishwasher according to another embodiment of the present invention.
10 is a sectional view of a selector valve of a dishwasher according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining a pump and a dishwasher including the same according to embodiments of the present invention.

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

The dishwasher 100 according to an embodiment of the present invention includes a cabinet 1 forming an outer appearance, a tub 11 provided in the cabinet 1 to receive a dishware, A steam supply section 6 for discharging steam into the tub 11; a sump 13 for storing wash water; and a water supply section for supplying wash water stored in the sump 13 to the plurality of minute sandstone members 3, And a pump 8 for supplying steam to the steam generators 3 and 5 to generate steam and supply the steam to the steam supplier 6.

In the tub 11, a plurality of racks 191 and 193 for storing dishes are provided. The plurality of racks 191 and 193 may include an upper rack 191 provided in an upper region of the tub 11 and a lower rack 193 provided in a lower region of the tub 11. [

The tub (11) is opened and closed by a door (16) provided on one side of the cabinet (1). The user can take out the plurality of racks 191 and 193 from the tub 11 after opening the door 16. [

The plurality of spraying arms 3 and 5 may include an upper arm 3 for spraying washing water to the upper rack 191 and a lower arm 5 for spraying washing water to the lower rack 193. The washing water sprayed from the plurality of spray guns (3, 5) is collected into the sump (13).

The sump 13 is provided under the tub 11 to store wash water. A sump cover (15) is disposed above the sump (13). The sump cover 15 is provided with a recovery hole 151 so that the washing water in the tub 11 can pass therethrough and flow into the sump 13. [

The sump 13 is connected to an external water supply source through a water supply pipe 135. The water supply pipe 135 is opened and closed by a water supply valve 136. The wash water stored in the sump 13 is discharged to the outside of the cabinet 1 through the drain pipe 137 and the drain pump 139.

The washing water stored in the sump 13 is supplied to the plurality of spraying arms 3 and 5 through the pump 8 and the washing water supplying portion 7. [ The washing water supply unit 7 includes a main connection pipe 77 connected to the pump 8, an upper connection pipe 71 connecting the main connection pipe 77 and the upper arm 3, a main connection pipe 77, And a lower connection pipe (73) connecting the lower arm (5).

The upper connection pipe 71 and the lower connection pipe 73 are branched from the main connection pipe 77 and the upper connection pipe 71 and / A switching valve 75 for controlling the opening and closing of the lower connecting pipe 73 is provided.

The sump 13 is connected to the pump 8 and the supply pipe 131. The supply pipe 131 guides the wash water in the sump 13 to the pump 8.

The steam supply unit (6) discharges the steam into the tub (11). The steam discharged from the steam supply unit 6 rises and acts on the dishes stored in the racks 191 and 193. The steam supply unit 6 includes a steam nozzle 61 disposed in the tub 11 or the door 16 to discharge steam into the tub 11 and a steam supply pipe 61 connecting the steam nozzle 61 and the pump 8, (63).

The pump 8 transfers the wash water stored in the sump 13 to the wash water supply section 7. The pump 8 can heat the washing water conveyed to the washing water supply part 7. [ The pump 8 sucks the washing water stored in the sump 13 and supplies the washing water to the plurality of spraying arms 3 and 5 through the washing water supply unit 7.

The pump 8 generates steam and supplies it to the steam supply unit 6. [ The pump 8 generates steam by heating the washing water stored in the pump 8 without transferring the washing water. The steam generated in the pump 8 is discharged into the tub 11 through the steam supply part 6. [

The pump 8 will be described in detail with reference to FIG. 2 and the following figures.

FIG. 2 is an exploded perspective view of a pump according to an embodiment of the present invention, and FIG. 3 is a schematic cross-sectional view of a pump according to an embodiment of the present invention.

The pump 8 according to an embodiment of the present invention includes a cylindrical housing 82 fixed to the inside of the cabinet 1, a washing and infusing inlet 841 connected to the housing 82 to receive wash water, A washing water outlet pipe 849 connected to the housing 82 for discharging wash water and an impeller 85 for discharging wash water introduced into the washing water inflow inlet pipe 841 into the washing water outlet pipe 849 disposed inside the housing 82 A heater 81 connected to the housing 82 to generate steam by heating the washing water in the housing 82 and a heater 81 disposed in the washing water outlet tube 849 for discharging steam generated by the heater 81 And a selector valve (83) connected to the steam discharge pipe (845) to block the discharge of the wash water and to allow the discharge of steam.

The housing 82 is formed in a cylindrical shape with its top and bottom open. A housing cover 823 is coupled to the upper end of the housing 82, and a heater 81 is coupled to the lower end. The housing cover 823 covers the upper portion of the housing 82 and the housing cover 823 is provided with a motor 87 for generating a rotational force to rotate the impeller 85.

A partition wall 84 is disposed inside the housing 82. The partition 84 divides the internal space of the housing 82 into upper and lower portions. The partition wall 84 forms the negative pressure chamber C1 and the positive pressure chamber C2 inside the housing 82. [ The negative pressure chamber C1 is a place where negative pressure is generated by the rotation of the impeller 85 and the positive pressure chamber C2 is a place where positive pressure is generated by the rotation of the impeller 85. The negative pressure chamber C1 is connected to the sump 13 through the supply pipe 131 and the cleaning inflow inlet 841. The positive pressure chamber C2 is connected to the plurality of spraying arms 3 and 5 through the washing water outlet pipe 849 and the washing water supplying portion 7.

The partition wall 84 is formed with a communication hole 86 for communicating the negative pressure chamber C1 and the positive pressure chamber C2. The side of the partition wall 84 on the side of the positive pressure chamber C2 is formed as a volute.

The impeller 85 is rotated by the motor 87 to discharge the water in the housing 82 to the outside. The impeller 85 is rotatably disposed in the positive pressure chamber C2. The impeller 85 transfers the washing water introduced into the positive pressure chamber C2 from the negative pressure chamber C1 through the communication hole 86 to the washing water outlet pipe 849. [

The heater 81 is connected to the lower end of the housing 82 to form a bottom surface of the housing 82. The heater 81 heats the washing water flowing inside the housing 82 when the impeller 85 rotates. The heater 81 generates steam by heating the washing water in the housing 82 when the impeller 85 stops.

The washing and feeding inlet 841 is connected to the negative pressure chamber C1 side of the housing 82. [ The wash water inflow inlet pipe 841 is connected to the supply pipe 131 and the wash water of the sump 13 flows into the negative pressure chamber C1. The rinsing infusion inlet 841 is arranged to protrude outward from the lower side wall of the housing 82. The wash-water inflow inlet 841 is arranged so that the tube direction is horizontal so that the wash water flows in the horizontal direction. A check valve 842 for opening and closing the wash water inflow inlet 841 is disposed in the wash water inflow inlet 841.

The washing water outlet pipe 849 is connected to the positive pressure chamber C2 side of the housing 82. The washing water outlet pipe 849 is connected to the connecting pipe 77 of the washing water supplying unit 7 so that the washing water of the positive pressure chamber C2 flows out to the connecting pipe 77. The washing water outlet pipe 849 is arranged to protrude outward from the upper side wall of the housing 82. The wash water outlet pipe 849 is arranged so that the pipe direction is horizontal so that the wash water flows in the horizontal direction.

The steam discharge pipe 845 connects the housing 82 and the steam supply part 6. The steam discharge pipe 845 is preferably disposed in the housing 82 or the wash water discharge pipe 849. The steam discharge pipe 845 supplies the steam generated in the housing 82 to the steam supply unit 6 by the heater 81.

The selector valve 83 is disposed between the steam discharge pipe 845 and the steam supply part 6. The selector valve 83 is opened and closed to allow the steam discharged from the steam discharge pipe 845 to flow to the steam supply unit 6 and to prevent the wash water flowing into the steam discharge pipe 845 from flowing out to the steam supply unit 6 . In the selector valve 83, the internal flow path is opened when the steam is introduced or normally (when the wash water is not introduced), and the internal flow path is closed when the wash water flows. The selector valve 83 is disposed such that the inlet is lower than the outlet. At this time, the inlet is the side on which steam or wash water flows, and the outlet is the side on which steam flows. The selector valve 83 is connected to the steam discharge pipe 845 and the valve pipe 846. The inlet of the selector valve 83 is connected to the valve tube 846 and the outlet thereof is connected to the steam supply pipe 63 of the steam supply part 6.

The selector valve 83 is disposed above the steam discharge pipe 845. The selector valve 83 is disposed on the upper side of the motor 87. The selector valve 83 is disposed below the steam nozzle 61. The selector valve 83 is disposed below the bottom of the tub 11.

FIG. 4 is an exploded perspective view of a selector valve of a dishwasher according to an embodiment of the present invention, FIG. 5 is an operational example of a selector valve of a dishwasher according to an embodiment of the present invention, FIG. FIG. 7 is a sectional view of a selector valve of a dishwasher according to an embodiment of the present invention, and FIG. 8 is a sectional view of a selector valve of a dishwasher according to an embodiment of the present invention. 1 is a perspective view of a dishwasher according to an embodiment of the present invention.

The selector valve 83 according to an embodiment of the present invention includes a valve body 831 in which a flow path is formed, a valve seat 833 disposed at the outlet 8312 side of the valve body 831, And a valve ball 832 disposed inside the body 831 and contacting the valve seat 833 to close the flow path of the valve body 831. [

In this embodiment, the valve body 831 is formed in a tubular shape having a flow path formed therein. The valve body 831 is opened at its both ends to form an inlet 8311 through which wash water or steam flows and an outlet 8312 through which steam flows. The valve body 831 is disposed such that the tube direction C is inclined upward. That is, the inlet 8311 of the valve body 831 is disposed lower than the outlet 8312.

The tube direction C of the valve body 831 has an angle (i) between the horizontal direction and an acute angle. The following experiment was carried out with respect to the angle (i) with respect to the tube direction C of the valve body 831.

(I) 0 degrees 15 degrees 30 degrees 45 degrees Steam valve ball
location There is a lot of movement.
Open and close repeat Fine movement Located at the bottom Located at the bottom Motor minimum RPM for closure 1000 1300 1500 1900 Steam injection pressure 0.0040 0.0042 0.0040 0.0041 Steam start time 05:51 04:38 05:09 05:36

As a result of the experiment, when the angle i is 0 degrees, that is, when the tube direction C of the valve body 831 is horizontal, the inlet of the valve seat 833 at the time of steam can be closed by the valve ball 832 Which is undesirable. In addition, when the angle i is 45 degrees or more, the RPM of the motor 87 must be excessively high in order to close the inlet of the valve seat 833 by the valve ball 832, thus wasting energy. The steam start time which is the time taken for the steam to be injected into the tub 11 after the operation of the heater 81 is shortened at the angle i between 15 degrees and 30 degrees. Therefore, the angle i between the valve body 831 and the tube direction C is preferably 15 to 30 degrees.

The inlet 8311 of the valve body 831 is connected to the valve tube 846 and the outlet 8312 is connected to the steam supply pipe 63 of the steam supply unit 6. A valve seat 833 is inserted and coupled to the outlet 8312 side of the valve body 831. A valve ball 832 is accommodated in the valve body 831.

Inside the inlet side of the valve body 831, a plurality of valve ribs 8313 on which the valve ball 832 is seated is formed. Each of the plurality of valve ribs 8313 protrudes radially from the inner surface of the valve body 831. Each of the plurality of valve ribs 8313 is disposed in the longitudinal direction of the valve body 831 in the tube direction and the height direction thereof is disposed in the radial direction of the valve body 831. A plurality of valve ribs 8313 are disposed in the circumferential direction of the valve body 831. At least one upper end of the plurality of valve ribs 8313 is in contact with the valve ball 832 when no wash water flows into the interior of the valve body 831.

On the outer surface of the valve body 831, a valve coupling portion 8314 for coupling the valve body 831 to the sump 13 is formed. 8, the valve coupling portion 8314 is coupled to the sump coupling portion 132 formed in the sump 13 in a bolt (not shown). A selector valve (83) is disposed on the side surface of the sump (13). The selector valve 83 is disposed above the pump 8. It is preferable that the selector valve 83 is disposed above the main connection pipe 77. It is preferable that the selector valve 83 is disposed above the supply pipe 131.

The valve seat 833 is formed in a tubular shape and is inserted into the outlet 8312 of the valve body 831. The valve seat 833 is made of rubber or plastic of a soft material. When the washing water flows into the valve body 831, the lower end of the valve seat 833 comes into close contact with the valve ball 832. Upon entry of the wash water, the inlet of the valve seat 833 is closed by the valve ball 832.

The valve ball 832 is movably disposed inside the valve body 831. [ The valve ball 832 moves between the upper ends of the plurality of valve ribs 8313 in the valve body 831 and the inlet of the valve seat 833. The diameter D4 of the valve ball 832 is smaller than the inner diameter D1 of the portion where the valve rib 8313 and the valve seat 833 are not disposed in the valve body 831 (the inner diameter of the valve body 831) small. The diameter D4 of the valve ball 832 is larger than the inner diameter D2 of the valve seat 833. [ The diameter D4 of the valve ball 832 is larger than the separation distance D3 of the plurality of valve ribs 8313. [ The distance D3 between the plurality of valve ribs 8313 is a diameter D3 of a virtual circle connecting the free ends of the plurality of valve ribs 8313. [

When steam is generated, the valve ball 832 contacts at least one of the plurality of valve ribs 8313, so that steam can be smoothly passed through the plurality of valve ribs 8313. It is preferable that the inner diameter D1 of the valve body 831 is sufficiently larger than the diameter D4 of the valve ball 832 in order to secure the sectional area of the steam channel. Sectional area S3 based on the separation distance D3 of the plurality of valve ribs 8313 is larger than the diameter of the valve ball 832 in the sectional area S1 based on the inner diameter D1 of the valve body 831 Which is obtained by subtracting the cross-sectional area S4 based on the cross-sectional area D4. That is, it is preferable that S3 < (S1 - S4).

5 (a), when steam is introduced into the valve body 831, the valve ball 832 is brought into contact with the plurality of valve ribs 8313 due to its own weight, or a plurality of valve ribs 8313 At least one of which is in contact with the inner surface of the valve body 831. The steam flowing into the valve body 831 passes between the space between the plurality of valve ribs 8313 and the inner surface of the valve ball 832 and the valve body 831 and flows from the valve body 831 to the steam supply pipe 63 .

5 (b), when the washing water flows into the valve body 831, the valve ball 832 is brought into close contact with the inlet of the valve seat 833 by the flow pressure or buoyancy of the washing water. When the washing water is introduced, the valve ball 832 closes the inlet of the valve seat 833 to close the flow path of the valve body 831. The washing water flowing into the valve body 831 does not flow out from the valve body 831 to the steam supply pipe 63.

The valve ball 832 is preferably made of a metal material having a specific gravity of 1 or more so that the valve ball 832 is seated on the plurality of valve ribs 8313 by its own weight and is brought into close contact with the inlet of the valve seat 833 by the flow pressure and buoyancy of the washing water. When the valve ball 832 is in close contact with the inlet of the valve seat 833 as shown in FIG. 5 (b), the washing water does not flow so that the flow pressure of the washing water is not applied, . &Lt; / RTI &gt; Therefore, it is preferable that the valve ball 832 is made of a relatively light metal so as to be brought into close contact with the inlet of the valve seat 833 by buoyancy. Since the washing water is high temperature and contains detergent and various kinds of foreign substances, the valve ball 832 is required to have strength, heat resistance and chemical resistance. In order to satisfy the above-described conditions, the valve ball 832 is preferably made of alumina.

When the valve ball 832 is in close contact with the inlet of the valve seat 833 as shown in FIG. 5 (b), the flow pressure of the washing water is not applied to prevent the valve ball 832 from being disengaged from the valve seat 833 A slit 8331 is formed in the inner peripheral surface of the valve seat 833 on the inlet side (the side in contact with the valve ball 832) in the longitudinal direction.

Referring to FIGS. 6 and 7, the slit 8331 prevents the valve ball 832 from completely blocking the inlet side of the valve seat 833. The slit 8331 is formed in the longitudinal direction on the inner peripheral surface of the valve seat 833. It is not desirable that the slit 8331 is formed from the inlet side to the outlet side of the valve seat 833 and is formed so as not to exceed a half of the length of the valve seat 833 at the inlet side of the valve seat 833. A plurality of slits 8331 can be formed, and two slits 8331 are formed in this embodiment.

9 is a sectional view of a selector valve of a dishwasher according to another embodiment of the present invention.

The selector valve 83-1 according to another embodiment of the present invention includes a valve body 831-1 formed in a substantially rectangular parallelepiped shape and a valve body 831-2 protruding in the horizontal direction from the upper portion of one side surface of the valve body 831-1 And a tubular inlet 8311-1 projecting horizontally from the bottom of the other side surface of the valve body 831-1. The inflow portion 8311-1 is supplied with wash water or steam, and the outflow portion 8312-1 is discharged with steam. The valve ball 832-1 according to another embodiment of the present invention is disposed inside the valve body 831-1. The diameter of the valve ball 832-1 is larger than the inner diameter of the inlet 8311-1. The valve seat 833-1 according to another embodiment of the present invention is inserted and coupled to the outflow portion 8312-1.

The valve ball 832-1 is disposed on the bottom surface of the valve body 831-1 when steam is introduced into the valve body 831-1. When the washing water flows into the valve body 831-1, the valve ball 832-1 is brought into close contact with the inlet of the valve seat 833-1 by the flow pressure or buoyancy of the washing water.

10 is a sectional view of a selector valve of a dishwasher according to another embodiment of the present invention.

The selector valve 83-2 according to another embodiment of the present invention includes a valve body 831-2 formed in a substantially triangular prism shape with an upper surface inclined, Like outflow portion 8312-2 protruding in the horizontal direction and a tubular inflow portion 8311-2 protruding in the horizontal direction from the lower portion of the other side of the valve body 831-2. The valve body 831-2 is formed in the form of a triangular prism whose front and rear surfaces are substantially triangular. The inflow portion 8311-2 is supplied with wash water or steam, and the outflow portion 8312-2 is discharged with steam. A valve ball 832-2 according to another embodiment of the present invention is disposed inside the valve body 831-2. The diameter of the valve ball 832-2 is larger than the inner diameter of the inlet 8311-2. The valve seat 833-2 according to another embodiment of the present invention is inserted and coupled to the outlet 8312-2. The outflow portion 8312-2 is formed such that its diameter becomes larger toward the side where the inlet side is coupled with the valve body 831-2. The valve ball 832-2 may be at least partially inserted into the inlet side of the outlet 8312-2.

When steam is introduced into the interior of the valve body 831-2, the valve ball 832-2 is disposed on the bottom surface of the valve body 831-2. When the washing water flows into the valve body 831-2, the valve ball 832-2 is brought into close contact with the inlet of the valve seat 833-2 by the flow pressure or buoyancy of the washing water.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It should be understood that various modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.

11: TUB 13: Sump
131: supply pipe 3, 5: minute sandstone
6: steam supply part 7: wash water supply part
8: Pump 81: Heater
82: housing 823: housing cover
83: selector valve 831: valve body
832: Valve ball 833: Valve seat
84: Bulkhead 841: Washing Milking Entry
845: Steam discharge pipe 849: Wash water discharge pipe
85: impeller 87: motor

Claims (20)

housing;
A washing and feeding inlet connected to the housing to introduce wash water;
A washing water outlet pipe connected to the housing to discharge wash water;
An impeller disposed inside the housing and flowing the washing water flowing into the washing and infiltrating oil inlet into the washing water outlet pipe;
A heater coupled to the housing and heating the wash water in the housing to generate steam;
A steam discharge pipe through which steam generated by the heater is discharged; And
And a selector valve connected to the steam discharge pipe to block the discharge of wash water and to allow the discharge of steam. The method according to claim 1,
Wherein the selector valve is closed upon entry of the wash water and is opened upon entry of steam. The method according to claim 1,
The selector valve having an inlet disposed lower than the outlet. The method according to claim 1,
Wherein the selector valve comprises:
A valve body having a passage formed therein;
A valve seat disposed on an outlet side of the valve body; And
And a valve ball disposed within the valve body and contacting the valve seat to close the flow path of the valve body. 5. The method of claim 4,
Wherein the valve body is formed in a tubular shape and the tube direction is disposed obliquely upward. 6. The method of claim 5,
Wherein the valve body protrudes radially inside the inlet side to form a plurality of valve ribs on which the valve balls are seated. The method according to claim 6,
Wherein the plurality of valve ribs are disposed apart from each other in the circumferential direction of the valve body. The method according to claim 6,
Wherein the valve ball is larger in diameter than the separation distance of the plurality of valve ribs and smaller than the inner diameter of the valve body. 9. The method of claim 8,
Wherein the cross-sectional area based on the spacing distance of the plurality of valve ribs is smaller than the cross-sectional area of the valve body minus the cross-sectional area of the valve ball. 5. The method of claim 4,
Wherein the valve body is formed in a rectangular parallelepiped shape,
The selector valve may further include a tubular outlet portion projecting horizontally from an upper portion of one side surface of the valve body and a tubular inlet portion projecting horizontally from a lower side of the other side surface of the valve body. 5. The method of claim 4,
Wherein the valve body is formed in a triangular prism shape whose upper surface is inclined,
Wherein the selector valve further includes a tubular outlet portion projecting horizontally from one side of the valve body and a tubular inlet portion projecting horizontally from the other side of the valve body. 5. The method of claim 4,
Wherein the valve seat has a slit formed in the longitudinal direction on the inner circumferential surface on the inlet side. 5. The method of claim 4,
Wherein the valve ball is made of alumina. The method according to claim 1,
And the selector valve is disposed above the steam discharge pipe. The method according to claim 1,
Further comprising a motor for rotating the impeller,
And the selector valve is disposed above the motor. A tub in which the dishware is received;
A spray gun for spraying wash water into the tub;
A steam nozzle for discharging steam into the tub;
A sump in which wash water is stored;
A pump for supplying wash water stored in the sump to the spray gun to generate steam and supply the steam to the steam nozzle; And
And a selector valve disposed between the pump and the steam nozzle to shut off the flow of the washing water and allow the steam to be discharged. 17. The method of claim 16,
Wherein the selector valve is closed by the wash water flow pressure upon entering the wash water from the pump. 17. The method of claim 16,
Wherein the selector valve is coupled to the sump. 17. The method of claim 16,
Further comprising a supply pipe connecting the pump to the sump,
Wherein the selector valve is disposed above the supply pipe. 17. The method of claim 16,
Wherein the selector valve is disposed below the steam nozzle.

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