JP2001299665A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher that can spread dishwater evenly inside a tub even if the tub is a thin type. SOLUTION: A dishwater injecting member 9 has a nozzle base 91 arranged in an embedded relation to the bottom of the tub 2, two rotary nozzles 92 and 93 juxtaposed on the nozzle base 91, and a screw nozzle 94 interposed between the two rotary nozzles 92 and 93. The screw nozzle 94 is for spreading dishwater especially to an inaccessible portion to injection water from the rotary nozzles 92 and 93, and is formed outside the rotation regions of the rotary nozzles 92 and 93 in the bottom view of the tub 2 from the side of a basket storing part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes.

[0002]

2. Description of the Related Art For example, a general dishwasher for home use has a washing chamber having a substantially square shape in plan view. An arm having a length substantially equal to one side of the cleaning chamber in a plan view is rotatably provided at the bottom of the cleaning chamber, and the cleaning water is sprayed from a plurality of nozzles arranged on the upper surface of the arm. Has become. Used dirty dishes to be washed are set above the arm in the washing room, and a fountain flow from the arm (nozzle) is sprayed on the set dishes. . In addition, the arm is rotated by the reaction force of the fountain flow at this time, thereby,
The fountain stream is evenly sprayed on the dishes set in the washing room, and the dirt attached to the dishes is thoroughly removed.

[0003]

By the way, in the above-mentioned conventional dishwasher, the outer shape of the dishwasher is formed in a substantially square shape in plan view corresponding to the shape of the washing room. For this reason, the conventional dishwasher requires a relatively large installation space, and cannot be installed in a narrow space such as a side of a sink of a sink. Therefore, in order to enable the dishwasher to be installed in a space beside the sink, for example, the outer shape of the washing room is shortened in the front-rear direction, which is the direction in which the car is put in and out in a plan view, and in the left-right direction orthogonal to the direction. The idea was to form it into a long rectangular thin shape. However, if the cleaning chamber is formed to be thin, the arm disposed at the bottom of the cleaning chamber must be formed shorter than the short side of the cleaning chamber in plan view. A new problem of uneven washing of dishes has arisen because it is difficult to spread them evenly throughout the room.

[0004] The present invention has been made under the above-mentioned background, and an object of the present invention is to allow washing water to uniformly reach dishes set in a washing room even in a thin washing room. It is to provide a dishwasher that can.

[0005]

According to the first aspect of the present invention, there is provided a dishwasher for washing dishes by spraying washing water, wherein the dishes to be washed are arranged. A washing chamber having a tableware accommodating section for washing, a nozzle base which is disposed facing the washing chamber, and has a flow passage therein through which washing water flows, and is rotatably provided on the nozzle base, A plurality of rotating nozzles for injecting the washing water supplied through the flow passage in the nozzle base toward the tableware accommodating portion, and provided between the plurality of rotating nozzles, A dishwasher, comprising: a fixed nozzle for injecting washing water supplied through the flow passage toward the dish storage unit.

According to the present invention, a plurality of rotary nozzles are provided, and a fixed nozzle is provided between the plurality of rotary nozzles. Thereby, the washing chamber is formed in a thin shape having a substantially rectangular outer shape in plan view (Claim 5), and even if the rotary nozzle is formed to be short corresponding to the thin washing chamber, tableware is stored. A sufficient amount of washing water can be distributed to almost the entire area. Therefore, the washing water can be sprayed evenly on the tableware stored in the tableware storage section, and the tableware can be washed evenly and satisfactorily.

[0007] As described in claim 2, the fixed nozzle is preferably disposed at a position avoiding each rotation area of the plurality of rotation nozzles when viewed from the tableware accommodating portion. . In this case, the washing water sprayed from the fixed nozzle can be prevented from hitting the rotating rotary nozzle, and the washing water from the fixed nozzle can be satisfactorily sprayed on the tableware stored in the tableware storage unit. Further, as described in claim 3, the fixed nozzle has a rotating shaft portion rotatably arranged around a predetermined rotating axis and a blade arranged around the rotating shaft portion. Preferably, the nozzle is configured to rotate around the rotation axis by the washing water supplied through the flow passage in the nozzle base, and spray the washing water in multiple directions by this rotation. In this case, since the washing water injected from the fixed nozzle is injected in multiple directions, it reaches a wide range including a portion where the injection water from the rotating nozzle hardly reaches. Therefore, the tableware stored in the tableware storage section can be washed more evenly.

According to a fourth aspect of the present invention, the flow path in the nozzle base is formed to be long in a predetermined direction, and the flow path for the cleaning water is provided at a position deviated to one end side in the longitudinal direction. Is formed so as to be gradually narrowed from the washing water supply port toward the other end in the longitudinal direction of the flow passage. A dishwasher according to any of the preceding claims. According to this invention, the flow passage in the nozzle base gradually narrows toward the downstream side in the flow direction of the washing water. Accordingly, even when the cleaning water is supplied from the cleaning water supply port arranged at a biased position of the nozzle base, the flow rate of the cleaning water flowing in the flow passage can be made substantially uniform, and The flow rates of the washing water flowing into the plurality of rotary nozzles from the path can be made substantially the same. as a result,
Flow rate (water pressure) of washing water ejected from multiple rotating nozzles
Can be made substantially the same, and the tableware stored in the tableware storage portion can be washed evenly.

The number of the rotary nozzles may be two or three or more. When two rotating nozzles are provided, the fixed nozzle is preferably provided between the two rotating nozzles, and when three or more rotating nozzles are provided, the rotating nozzle is For example, it may be provided between two rotating nozzles adjacent to each other, or only one may be provided between two rotating nozzles among the three or more rotating nozzles.

[0010] The invention according to claim 6 is provided with a washing room capable of accommodating tableware to be washed, and provided in the washing room.
Two rotating nozzles for injecting washing water toward the tableware accommodated in the washing chamber, and arranged to face the washing chamber, and for rotatably holding the two rotating nozzles. A nozzle base, and inside the nozzle base, a flow passage through which the cleaning water to be supplied to the two rotary nozzles flows is formed long along the arrangement direction, and the flow passage is Wash water is supplied from a wash water supply port arranged at a position deviated to one end side in the longitudinal direction, and goes from the wash water supply port to the other end in the longitudinal direction of the flow passage. The dishwasher is characterized in that the dishwasher is formed so as to gradually become narrower.

According to the present invention, substantially the same effects as those described in relation to the fourth aspect can be obtained. In other words, even if the cleaning water is supplied from the cleaning water supply port arranged at a biased position of the nozzle base, the flow rate (water pressure) of the cleaning water ejected from the two rotary nozzles should be substantially the same. The tableware stored in the washing room can be washed evenly.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a sectional view showing a configuration of a dishwasher according to one embodiment of the present invention. The dishwasher has a cabinet 1 forming an outer shape, and a glass G is provided inside the cabinet 1.
A washing room 2 for washing dishes such as dishes and dishes T is defined. Tableware such as a glass G and a dish T are arranged in a dedicated basket 3, and the whole basket 3 is stored in a basket storage section (tableware storage section) 21 set at an upper part in the washing room 2. ing. For example, the glass G is the basket body 3
Shelf support member 3 extending upward along one side of 1
2 and is arranged on a glass placing shelf 33 provided to extend above the car body 31.

The width of the washing room 2 in the front-rear direction (left-right direction parallel to the sheet of FIG. 1) when the dishwasher is viewed from the front is larger than the width in the left-right direction (direction perpendicular to the sheet of FIG. 1). It is formed short. The front surface of the washing room 2 is slightly inclined so that the upper portion is behind the lower portion, and almost the entire basket from the lower central portion to the upper edge of the front surface has a basket 3.
The opening 22 for taking in and out is formed. The upper door 4 and the lower door 5 are provided in relation to the opening 22 of the cleaning chamber 2.
Can be opened and closed. That is,
The upper door 4 and the lower door 5 are rotatably attached to rotating shafts 41 and 51 provided on the front side of the upper end edge and the lower end edge of the opening 22, respectively, and are substantially parallel to the front surface of the cleaning chamber 2. The opening 22 can be closed in an adjacent state in a plane. Then, from that state, the opening 22 can be opened by flipping the upper door 4 upward and pulling down the lower door 5. At this time, the lower door 5 is in a state where the inner surface 52 is substantially along the horizontal plane. Therefore, at this time, a part of the car 3 is placed on the inner surface 52 of the lower door 5 facing upward.
The tableware can be put in and out of the basket 3 in this state. On the other hand, the upper door 4
A state in which the cleaning chamber 2 is slightly tilted backward from the vertical plane including the rotation shaft 41 (for example, a state substantially along the front surface of the cleaning chamber 2). Thereby, the upper door 4 does not become an obstacle when the basket 3 is moved in and out of the washing room 2 and the tableware is moved in and out of the basket 3, and the upper door 4 is undesirably lowered by a hand or the like. Can be suppressed.

The washing chamber 2 is supplied with washing water from a water supply facility (not shown), and a pipe, a valve, and the like (not shown) are provided below the washing chamber 2. . The cleaning water supplied into the cleaning chamber 2 is collected in a water collecting section 23 formed one step lower on the bottom of the cleaning chamber 2, and at the time of cleaning, the cleaning water collected in the water collecting section 23. Is pumped out through a water sampling pipe 7 by a washing pump 6 arranged below the washing chamber 2. The washing water pumped by the washing pump 6 is sent through a water pipe 8 to a washing water jetting member 9 arranged on the bottom surface of the washing chamber 2, and from the washing water jetting member 9 to the car housing 21. It is injected. Then, the washing water jetted from the washing water jetting member 9 collides with the tableware in the car 3 stored in the car storage section 21, and thereby the dirt attached to the tableware is cleanly removed.

FIG. 2 is a sectional view showing the bottom of the cleaning chamber 2. At the bottom of the cleaning chamber 2, a cleaning water injection member 9 is disposed substantially at the center, and a water collecting portion 23 is formed on the near side (opening 22 side) of the cleaning water injection member 9. In the water collecting part 23, a heater H for warming the washing water collected in the water collecting part 23 is arranged. In addition, water collecting part 23
A water sampling port 231 for communicating the water collecting section 23 with the water sampling pipe 7 (see FIG. 1) is formed in the bottom surface of the water sampling section 23. Although not shown, a filter for capturing dirt dropped from tableware is attached to the water sampling port 231.

FIG. 3 is a sectional view showing the structure of the cleaning water spraying member 9. Referring to FIGS. 2 and 3, cleaning water jetting member 9 includes a nozzle base 91 embedded in the bottom surface of cleaning chamber 2 and two rotating bases provided side by side on nozzle base 91. Nozzles 92 and 93 and these two
It has a screw nozzle 94 as a fixed nozzle provided between the rotating nozzles 92 and 93. The nozzle base 91 is formed using, for example, a synthetic resin, and is arranged in the left-right direction of the cleaning chamber 2 (the direction along the long side of the cleaning chamber 2).
Has a long wedge-shaped planar shape. The nozzle base 91 is formed in a lid shape with an open lower surface, and is fitted on the bottom surface of the cleaning chamber 2 in a concave portion 24 formed in a shape corresponding to the outer shape of the nozzle base 91. The space defined by the bottom surface of the concave portion 24 and the inner surface of the nozzle base 91 is a flow passage 95 through which the cleaning water to be jetted into the cleaning chamber 2 flows. Wash water sent from the water pipe 8 flows in through an inlet 25 formed near the end on the wide side of the bottom surface of the concave portion 24. On the upper surface of the nozzle base 91, arm shafts 911 and 912 are erected at predetermined positions in the longitudinal direction (the left and right direction of the cleaning chamber 2), and the arm shafts 911 and 912 are respectively provided with rotary nozzles. 92 and 93 are rotatably mounted and supported. The arm shafts 911 and 912 are formed in a substantially cylindrical shape, and the inside communicates with a flow passage 95 in the nozzle base 91.

The rotary nozzles 92 and 93 have a similar configuration. Specifically, each of the rotary nozzles 92 and 93 is formed in a hollow shape using, for example, a synthetic resin material, and has an elliptical planar shape that is long in one direction. A circular opening 96 is formed substantially at the center of the lower surface of each of the rotary nozzles 92 and 93, and an insertion tube 97 is formed so as to hang down from the periphery of the opening 96. On the lower surfaces of the rotary nozzles 92 and 93, a locking tubular portion 98 is formed so as to surround the insertion tubular portion 97. A projection 981 having a substantially triangular cross section is formed on the inner surface of the locking cylindrical portion 98. And the rotating nozzle 9
2 and 93 respectively attach the insertion cylinder 97 to the nozzle base 9.
1 into the arm shafts 911 and 912, and
Are engaged with the claw portions 913 and 914 formed on the outer peripheral surfaces of the arm shafts 911 and 912, respectively, so that the arm shafts 911 and 912 are attached so as not to come off.

The insides of the rotary nozzles 92 and 93 are attached to arm shafts 911 and 912, respectively.
Nozzle base 9 through opening 96 and insertion tube 97
1 communicates with the flow passage 95. The rotating nozzle 9
A plurality of water injection ports 99 are formed on the upper surfaces of the two and 93, respectively. As a result, the washing water flowing through the flow passage 95 in the nozzle base 91 from the inflow port 25 toward the end on the narrow side passes through the insertion nozzle 97 and the opening 96 in the middle of the rotation nozzles 92 and 93. Into the rotating nozzle 9
The water is jetted from a plurality of water jets 99 on the upper surface of the second and the second 93. Then, the rotating nozzle 92 reacts with the reaction force of the washing water that is jetted at this time.
Rotates, whereby the washing water can reach a wide area of the car housing portion 21 above the washing water jetting member 9.

The washing water jetted from the two rotary nozzles 92 and 93 thus reaches a wide area of the car housing section 21, and the washing water from the rotating nozzle 92 reaches the car housing section 21. In the vicinity of the boundary between the region and the region where the cleaning water from the rotary nozzle 93 reaches, there is a possibility that the amount of the cleaning water that reaches may be smaller than other portions.
Therefore, in this embodiment, in particular, the rotating nozzles 92, 9
A screw nozzle 94 is arranged on the upper surface of the nozzle base 91 so that the washing water can reach a portion where the jetting water from 3 does not easily reach. As a result, for example, the washing water can be satisfactorily sprayed on the glass G (see FIG. 1) placed on the glass placing shelf 33 of the car 3, and the basket 3 ( Tableware in (see FIG. 1) can be washed well and evenly.

As shown in FIG. 2, when the bottom surface of the cleaning chamber 2 is viewed from the car housing 21 side, the screw nozzle 94 rotates in the rotation area of the rotation nozzles 92 and 93 (the tip of the rotation nozzles 92 and 93). Area surrounded by a circular locus drawn by
s, 93s. As a result, the washing water injected from the screw nozzle 94 can be prevented from hitting the lower surfaces of the rotating rotary nozzles 92 and 93, and the washing water from the screw nozzle 94 is satisfactorily sprayed on the tableware set in the car housing 21. be able to.

Further, in this embodiment, the planar shape of the nozzle base 91 is formed in a wedge shape,
The inner flow passage 95 gradually narrows toward the downstream side in the flow direction of the washing water. The reason for this is that the flow rate of the wash water flowing in the flow passage 95 is made substantially uniform, and the flow rates of the wash water flowing into the rotary nozzles 92 and 93 from the flow passage 95 are made substantially the same. is there. This allows
The flow rate (water pressure) of the washing water spouted from the rotary nozzles 92 and 93 can be made substantially the same, and the dishes set in the car housing portion 21 can be washed evenly.

For example, when the flow rate of the washing water injected from the rotary nozzle 92 may be larger than the flow rate of the cleaning water injected from the rotary nozzle 93, the nozzle base 91 may be used.
The planar shape of the nozzle base 91 need not be formed in a wedge shape, and the nozzle base 91 may be formed to have a substantially uniform width in plan view. Further, even when the flow rates of the cleaning water ejected from the rotary nozzles 92 and 93 are made substantially the same, for example, the inflow port 25 for inflowing the cleaning water sent from the water supply pipe 8 is connected to the nozzle base 91. When formed at the center of the bottom surface, the nozzle base 91 may be formed to have a substantially uniform width in plan view.

FIG. 4 is a sectional view showing the structure of the screw nozzle 94. The screw nozzle 94 has a cylindrical portion 942 rising from the periphery of an opening 941 formed on the upper surface of the nozzle base 91, and a central axis of the cylindrical portion 942 formed in the cylindrical portion 942 from the upper end edge of the cylindrical portion 942. Inverted truncated cone-shaped recess 9 having an inclined surface inclined downward toward the bottom and a bottom surface connecting the lower edge of the inclined surface.
43 and a cylindrical boss 9 erected in the recess 94.
44 and an impeller 100 rotatably fitted to the boss 944.

The structure of the impeller 100 is shown in FIG. 5 (a) is a plan view of the impeller 100, FIG. 5 (b) is a cross-sectional view of the impeller 100 taken along the line BB 'shown in FIG. 5 (a), and FIG. FIG. 6 is a sectional view of the impeller 100 taken along the line CC ′ shown in FIG. The impeller 100 is, for example, a resin molded product, and as shown in FIG. 5, a cylindrical hub 101 and a total of eight hubs formed so as to radially spread outward from the outer peripheral wall of the hub 101. The blades 102 and 103 are provided. The eight blades 102 and 103 include four large blades 102 and small blades 103 each having a different amount of outward projection. The large blade 102 and the small blade 103 are
The hubs are alternately arranged at positions shifted by about 45 degrees around the hub 101. The upper end of the large blade 102 is inclined upward toward the outside, and the upper end of the small blade 103 is inclined downward toward the outside, opposite to the large blade 102. The lower ends of the blades 102 and 103 are located slightly above the lower end of the hub 101.

On the bottom surface of the concave portion 943, water jet holes 945 are respectively formed at positions shifted by about 90 degrees around the boss 944. As shown in FIG. 3, a part of the periphery of the water ejection hole 945 is provided with a water guide wall portion 946 for determining the direction of the wash water injected from the water ejection hole 945.
Are formed so as to rise obliquely toward the inside of the water ejection hole 945. The washing water that has reached the water ejection hole 945 from the flow passage 95 in the nozzle base 91 via the opening 941 and the cylindrical portion 942 rises along the water guide wall 946, and as shown by the thick arrow in FIG. It blows up diagonally upward.

The root portion of the boss 944 bulges to the outer peripheral side to form a seat surface 947 having a step one step higher than the bottom surface of the concave portion 943. That is, when the hub 101 of the impeller 100 is inserted into the boss 944, the lower end of the hub 101 comes into contact with the seating surface 947 and the downward displacement is regulated. On the other hand, a screw 948 having a maximum outer shape of the head larger than the inner diameter of the hub 101 is screwed into a screw hole (not shown) provided substantially vertically in the center of the boss 944. Of the impeller 100 is prevented. Further, the height from the seat surface 947 to the uppermost end of the boss 944 is larger than the height of the hub 101. Therefore, the impeller 100 can move the boss 94 at any position between the seating surface 947 and the uppermost end of the boss 944.
4 can be freely rotated about the rotation axis.

The water guide walls 946 of the four water ejection holes 945
Are water guide wall portions 946 adjacent to each other in plan view.
Are formed so as to be substantially orthogonal to each other. That is, the direction of the washing water spouted from each water spouting hole 945 is 90
The jetted washing water is shifted by degrees and impinges on the blades 102 and 103 of the impeller 100 from the same direction. As a result, the impeller 100 rotates about the boss 944, and the washing water that has collided with the blades 102 and 103 scatters in multiple directions. Further, a part of the washing water ejected from the water ejection hole 945 collides with the inclined surface of the concave portion 943, and is scattered in multiple directions by the collision. Further, the other part of the washing water is jetted upward without colliding with any of the blades 102 and 103 and the inclined surface of the concave portion 943.

As described above, the washing water jetted from the screw nozzle 94 scatters upward along various routes, and reaches a wide range including a portion where the jetting water from the rotary nozzles 92 and 93 is difficult to reach. Further, the force of the cleaning water to be jetted is not uniform, and there are various strong water flows reaching a relatively small range, and weak water flows reaching a relatively wide range. Therefore, the dirt attached to the tableware can be satisfactorily removed. When the number of blades of the impeller 100 is large, the interval between adjacent blades becomes narrow, so that the amount of washing water that passes between the blades decreases, and the screw nozzle 9
The force of the washing water injected from 4 becomes relatively weak. On the other hand, if the number of blades is small, a sufficient propulsion force for rotating the impeller 100 cannot be obtained. Therefore, in this embodiment, the large blade 102 that contributes to both the diffusion of the cleaning water and the rotation of the impeller 100 and the small blade 10 that contributes to the rotation of the impeller 100 without obstructing the passage of the cleaning water.
3 are provided. Thus, a sufficient amount of washing water can be injected from the screw nozzle 94, and the impeller 100 can be rotated well.

The large blade 102 and the small blade 10
The shape of 3 is not limited to the shape described above. For example, the height of the large blade 102 and the small blade 103 may be made different by making the amount of outward protrusion the same. As described above, according to this embodiment, in addition to the two rotating nozzles 92 and 93,
Since the screw nozzle 94 for allowing the washing water to reach the portion where the jet water from the rotary nozzles 92 and 93 is difficult to reach is provided, it is possible to spread a sufficient amount of washing water to almost the entire area of the car housing portion 21. Can, this car storage unit 21
The washing water can be sprayed evenly on the dishes in the basket 3 (see FIG. 1) set in. Therefore, the dishes can be washed well and evenly.

Although the embodiment of the present invention has been described above, the present invention can be embodied in other forms. For example, in the above embodiment, a thin dishwasher has been described as an example, but the present invention may be applied to a dishwasher having a substantially square outer shape in plan view. In addition, various design changes can be made within the scope of the matters described in the claims.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a bottom of a cleaning chamber.

FIG. 3 is a cross-sectional view illustrating a configuration of a cleaning water injection member.

FIG. 4 is a sectional view showing a configuration of a screw nozzle.

5A is a plan view of an impeller, and FIG. 5B is a plan view of the impeller.
(C) is a cross-sectional view of the impeller along a cutting plane line CC ′ shown in (a).

[Explanation of symbols]

 2 Washing Room 9 Washing Water Injecting Member 91 Nozzle Base 92 Rotating Nozzle 93 Rotating Nozzle 94 Screw Nozzle (Fixed Nozzle) 95 Flow Path 100 Impeller 101 Hub (Rotating Shaft) 102 Blade 103 Blade G Glass (Tableware) T Plate (Tableware)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsunori Shinmura 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Yasuhisa Fukui 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. F term (reference) 3B082 BA01 BL02 BL03

Claims (6)

[Claims] 1. A dishwasher for washing dishes by spraying washing water, comprising: a washing room having a dish storage portion for arranging dishes to be washed; and a washing room facing the washing room. A nozzle base having therein a flow passage through which water flows, and a nozzle base rotatably provided on the nozzle base, for injecting washing water supplied through the flow passage in the nozzle base toward the tableware container. A plurality of rotating nozzles, and a fixed nozzle provided between the plurality of rotating nozzles, for injecting the washing water supplied through the flow passage in the nozzle base toward the tableware container. A dishwasher characterized by including: 2. The dishwasher according to claim 1, wherein the fixed nozzle is disposed at a position avoiding each rotation area of the plurality of rotation nozzles when viewed from the dish storage portion. . 3. The nozzle according to claim 1, wherein the fixed nozzle has a rotating shaft portion rotatably arranged around a predetermined rotating axis and blades provided around the rotating shaft portion. The dishwasher according to claim 1 or 2, wherein the washing water is rotated around the rotation axis by washing water supplied through a flow passage in the inside, and the washing water is jetted in multiple directions by this rotation. 4. A flow path in the nozzle base is formed to be long in a predetermined direction, so that cleaning water is supplied from a cleaning water supply port disposed at a position deviated to one end in the longitudinal direction. The dishwasher according to any one of claims 1 to 3, wherein the dishwasher is formed so as to be gradually narrowed from the washing water supply port toward the other end of the flow passage in the longitudinal direction. Machine. 5. The dishwasher according to claim 1, wherein the washing chamber is formed in a thin shape having a substantially rectangular outer shape in plan view. 6. A washing chamber capable of accommodating dishes to be washed, and two rotary nozzles provided in the washing chamber for injecting washing water toward the dishes accommodated in the washing chamber. A nozzle base arranged to face the cleaning chamber and rotatably holding the two rotary nozzles, and the inside of the nozzle base should be supplied to the two rotary nozzles A flow passage through which the wash water flows is formed to be long along the arrangement direction, and the flow passage is supplied with the wash water from a wash water supply port disposed at a position deviated to one end side in the longitudinal direction. The dishwasher is formed so as to be gradually narrowed from the washing water supply port toward the other end in the longitudinal direction of the flow passage.