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JP7499080B2 - Dishwasher - Google Patents
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JP7499080B2 - Dishwasher - Google Patents

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JP7499080B2
JP7499080B2 JP2020105223A JP2020105223A JP7499080B2 JP 7499080 B2 JP7499080 B2 JP 7499080B2 JP 2020105223 A JP2020105223 A JP 2020105223A JP 2020105223 A JP2020105223 A JP 2020105223A JP 7499080 B2 JP7499080 B2 JP 7499080B2
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lower nozzle
nozzle
washing
axis direction
cleaning
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JP2021194451A (en
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龍成 大橋
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Rinnai Corp
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Rinnai Corp
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4278—Nozzles
    • A47L15/428—Rotary nozzles
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/50—Racks ; Baskets
    • A47L15/502—Cutlery baskets

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)

Description

本発明は、食器類を支持する食器かごが収納された洗浄槽と、洗浄槽内に設けられた洗浄ノズルと、洗浄槽内の洗浄水を洗浄ノズルに供給する洗浄ポンプとを備える食器洗浄機に関する。 The present invention relates to a dishwasher that includes a washing tub that contains a dish basket for supporting dishes, a washing nozzle provided in the washing tub, and a washing pump that supplies washing water from the washing tub to the washing nozzle.

従来、この種の食器洗浄機において、洗浄ノズルとして、洗浄槽の下部で水平方向にのび、長手方向中央部で鉛直軸線回りに旋回自在な下ノズルと、下ノズルの長手方向中央部に立設された上方にのびる上ノズルとを有するものを用いるものが知られている（例えば、特許文献１参照）。 Conventionally, in this type of dishwasher, a washing nozzle is known that has a lower nozzle that extends horizontally below the washing tub and can rotate around a vertical axis at the longitudinal center, and an upper nozzle that is erected at the longitudinal center of the lower nozzle and extends upward (see, for example, Patent Document 1).

ところで、洗浄槽の形状が平面視でほぼ長方形である場合、この長方形の長辺に平行な方向をＸ軸方向、短辺に平行な方向をＹ軸方向として、下ノズルの長手方向がＸ軸方向に沿う旋回位置における下ノズルの長手方向端部とこれに対向する洗浄槽の壁面（洗浄槽のＸ軸方向各側の壁面）との間の距離が、下ノズルの長手方向がＹ軸方向に沿う旋回位置における下ノズルの長手方向端部とこれに対向する洗浄槽の壁面（洗浄槽のＹ軸方向各側の壁面）との間の距離よりも長くなる。従って、洗浄槽のＸ軸方向各側の壁面近傍に置かれた食器類の洗浄能力が低下してしまう。 When the shape of the washing tank is approximately rectangular in plan view, the direction parallel to the long side of the rectangle is the X-axis direction, and the direction parallel to the short side is the Y-axis direction, the distance between the longitudinal end of the lower nozzle at a pivot position where the longitudinal direction of the lower nozzle is along the X-axis direction and the opposing wall surface of the washing tank (the wall surfaces on either side of the washing tank in the X-axis direction) is longer than the distance between the longitudinal end of the lower nozzle at a pivot position where the longitudinal direction of the lower nozzle is along the Y-axis direction and the opposing wall surface of the washing tank (the wall surfaces on either side of the washing tank in the Y-axis direction). This results in a decrease in the washing ability of dishes placed near the walls on either side of the X-axis direction of the washing tank.

特開２０１９－６３３３４号公報JP 2019-63334 A

本発明は、以上の点に鑑み、洗浄槽内の特定箇所に置かれた食器類の洗浄能力を向上できるようにした食器洗浄機を提供することをその課題としている。 In view of the above, the present invention aims to provide a dishwasher that can improve the washing performance of dishes placed in a specific location in the washing tub.

上記課題を解決するために、本発明は、食器類を支持する食器かごが収納された洗浄槽と、洗浄槽内に設けられた洗浄ノズルと、洗浄槽内の洗浄水を洗浄ノズルに供給する洗浄ポンプとを備える食器洗浄機であって、洗浄ノズルは、洗浄槽の下部で水平方向にのび、長手方向中央部で鉛直軸線回りに旋回自在な下ノズルと、下ノズルの長手方向中央部に立設された上方にのびる上下動不能な上ノズルとを有し、洗浄槽の形状が平面視でほぼ長方形であるものにおいて、洗浄ポンプから供給される洗浄水の下ノズルと上ノズルとへの分配比率を下ノズルの旋回位置に応じて可変する分配手段を備え、洗浄槽の平面視の形状である長方形の長辺に平行な方向をＸ軸方向、短辺に平行な方向をＹ軸方向として、分配手段は、下ノズルの長手方向がＸ軸方向に沿う旋回位置では、下ノズルの長手方向がＹ軸方向に沿う旋回位置よりも、下ノズルからの洗浄水の噴射量が多くなるように構成されることを特徴とする。 In order to solve the above problems, the present invention provides a dishwasher comprising a washing tub in which a dish basket for supporting dishes is stored, a washing nozzle provided in the washing tub, and a washing pump which supplies washing water from the washing tub to the washing nozzle, wherein the washing nozzle comprises a lower nozzle which extends horizontally at the bottom of the washing tub and which can be freely swiveled around a vertical axis at the longitudinal centre, and an upper nozzle which is erected at the longitudinal centre of the lower nozzle and extends upward and cannot be moved up and down , the washing tub having an approximately rectangular shape in a plan view, the washing tub is provided with a distribution means which varies the distribution ratio of washing water supplied from the washing pump to the lower nozzle and the upper nozzle depending on the pivot position of the lower nozzle , the direction parallel to the long side of the rectangular shape of the washing tub in a plan view being the X-axis direction, and the direction parallel to the short side being the Y-axis direction, and the distribution means is configured so that when the lower nozzle is in a pivot position where its longitudinal direction is along the X-axis direction, the amount of washing water sprayed from the lower nozzle is greater than when the lower nozzle is in a pivot position where its longitudinal direction is along the Y-axis direction .

本発明によれば、分配手段を、上記の如く下ノズルの長手方向がＸ軸方向に沿う旋回位置では、下ノズルの長手方向がＹ軸方向に沿う旋回位置よりも、下ノズルからの洗浄水の噴射量が多くなるように構成するため、洗浄能力が不足し勝ちな洗浄槽のＸ軸方向各側の壁面近傍に置かれた食器類の洗浄能力を向上させることができる。 According to the present invention, the distribution means is configured so that, as described above , when the lower nozzle is in a pivoted position where its longitudinal direction is along the X-axis direction, the amount of cleaning water sprayed from the lower nozzle is greater than when the lower nozzle is in a pivoted position where its longitudinal direction is along the Y-axis direction. This improves the cleaning ability of tableware placed near the walls on either side of the X-axis direction of the washing tank, which tends to have insufficient cleaning ability.

尚、分配手段の構造を簡素化するには、分配手段を以下の如く構成すればよい。即ち、洗浄槽の底部に、下ノズルの底板部の長手方向中央部に設けられた上方に凹入するソケット部に下方から挿入される、洗浄ポンプに接続される中空のジョイント部材を設け、ジョイント部材の上端に、ソケット部の上端に開設した上ノズル用連通口を介して洗浄水を上ノズルに分配する上ノズル用分配口を開設すると共に、ジョイント部材の周面に、下ノズルの長手方向を向くソケット部の周面部分に開設した下ノズル用連通口を介して洗浄水を下ノズルに分配する下ノズル用分配口を開設して、ジョイント部材で分配手段を構成する。そして、下ノズルの長手方向がＸ軸方向に沿う旋回位置では、下ノズルの長手方向がＹ軸方向に沿う旋回位置よりも、下ノズルからの洗浄水の噴射量が多くなるように、ジョイント部材の周方向位置によって下ノズル用分配口の開口面積を異ならせればよい。 To simplify the structure of the distribution means, the distribution means may be constructed as follows. That is, a hollow joint member connected to a washing pump is provided at the bottom of the washing tank and inserted from below into a socket portion recessed upwardly provided in the longitudinal center of the bottom plate portion of the lower nozzle, and an upper nozzle distribution port is opened at the upper end of the joint member to distribute washing water to the upper nozzle through an upper nozzle communication port opened at the upper end of the socket portion, and a lower nozzle distribution port is opened on the circumferential surface of the joint member to distribute washing water to the lower nozzle through a lower nozzle communication port opened in the circumferential surface portion of the socket portion facing the longitudinal direction of the lower nozzle, thereby forming a distribution means with the joint member. Then, the opening area of the lower nozzle distribution port may be made different depending on the circumferential position of the joint member so that the amount of washing water sprayed from the lower nozzle is greater at a rotation position where the longitudinal direction of the lower nozzle is along the X-axis direction than at a rotation position where the longitudinal direction of the lower nozzle is along the Y-axis direction.

本発明の実施形態の食器洗浄機の切断側面図。1 is a cutaway side view of a dishwasher according to an embodiment of the present invention. 図１のＩＩ－ＩＩ線で切断した切断平面図。FIG. 2 is a cross-sectional plan view taken along line II-II in FIG. 実施形態の食器洗浄機に設けられた下ノズルとジョイント部材の分離状態の斜視図。4 is a perspective view of a lower nozzle and a joint member provided in the dishwasher of the embodiment in a separated state. FIG.

図１に示す本発明の実施形態の食器洗浄機は、システムキッチンに組み込んで設置されるビルトイン式のものであり、前面が開放されたハウジング１内に前方に引出し自在に収納される洗浄槽２を備えている。洗浄槽２内には、食器類を支持する食器かご３が収納されると共に、食器かご３に向けて洗浄水を噴射する洗浄ノズル４が設けられている。尚、洗浄槽２の前面には、ハウジング１の前面を閉塞する前蓋２１が取付けられている。また、ハウジング１内の上部には、洗浄槽２の開放された上面を閉塞するシール蓋１１が設けられている。 The dishwasher according to an embodiment of the present invention shown in Figure 1 is a built-in type that is installed in a system kitchen, and has a washing tub 2 that is stored in a housing 1 with an open front so that it can be freely pulled out forward. A dish basket 3 that supports dishes is stored in the washing tub 2, and a washing nozzle 4 that sprays washing water toward the dish basket 3 is provided. A front cover 21 that closes the front of the housing 1 is attached to the front of the washing tub 2. A seal cover 11 that closes the open top surface of the washing tub 2 is provided at the top inside the housing 1.

洗浄槽２の底部には、残菜フィルタ２２を介して洗浄槽２内に連通する洗浄水の溜り部２３が設けられている。洗浄槽２の底部下側には、溜り部２３に連通する洗浄ポンプ５が設置されている。そして、洗浄ポンプ５を正転させたとき、洗浄槽２内の洗浄水が溜り部２３と洗浄ポンプ５とを介して洗浄ノズル４に供給され、洗浄ポンプ５を逆転させたとき、洗浄水が洗浄槽２から排水されるようにしている。 At the bottom of the washing tank 2, there is a washing water reservoir 23 that is connected to the inside of the washing tank 2 via a food residue filter 22. A washing pump 5 that is connected to the reservoir 23 is installed below the bottom of the washing tank 2. When the washing pump 5 is rotated forward, the washing water in the washing tank 2 is supplied to the washing nozzle 4 via the reservoir 23 and the washing pump 5, and when the washing pump 5 is rotated reversely, the washing water is drained from the washing tank 2.

洗浄ノズル４は、洗浄槽２の下部で水平方向にのび、長手方向中央部で鉛直軸線回りに旋回自在な下ノズル４１と、下ノズル４１の長手方向中央部に立設された上方にのびる上下動不能な上ノズル４２とを有している。下ノズル４１は、これに形成した複数のノズル孔４１１から洗浄水を噴射する。また、下ノズル４１の長手方向の各端部近傍に形成した、回転接線方向を向くノズル孔４１２からの洗浄水の噴射反力により、下ノズル４１が図２で時計回り方向に旋回する。上ノズル４２は、その上部に形成した複数のノズル孔４２１から洗浄水を噴射する。 The cleaning nozzle 4 has a lower nozzle 41 that extends horizontally below the cleaning tank 2 and is rotatable about a vertical axis at the longitudinal center, and an upper nozzle 42 that is erected at the longitudinal center of the lower nozzle 41 and extends upward, but is immovable up and down . The lower nozzle 41 sprays cleaning water from a plurality of nozzle holes 411 formed therein. The lower nozzle 41 rotates clockwise in Fig. 2 due to the reaction force of the spray of cleaning water from nozzle holes 412 that are formed near each longitudinal end of the lower nozzle 41 and face the tangent direction of rotation. The upper nozzle 42 sprays cleaning water from a plurality of nozzle holes 421 formed at its upper portion.

また、食器かご３として、洗浄槽２の下部に、下ノズル４１の上方に位置させて配置された、大皿、小皿、中鉢、椀等の比較的大型の食器Ｗ１を支持する下かご３１と、洗浄槽２の上部であって、上ノズル４２の後方に隣接した部分に配置された、コップや湯飲みに代表される有底の筒状食器Ｗ２を支持する上かご３２とが設けられている。下かご３１の中央部には、これに載置する食器Ｗ１が上ノズル４２に干渉することを防止できるように、上ノズル４２を囲うノズルガード枠３１１が立設されている。 The dish basket 3 includes a lower basket 31 that is positioned above the lower nozzle 41 at the bottom of the washing tub 2 and supports relatively large dishes W1 such as large plates, small plates, bowls, and bowls, and an upper basket 32 that is positioned at the top of the washing tub 2 and adjacent to the rear of the upper nozzle 42 and supports cylindrical dishes W2 with a bottom, such as cups and teacups. A nozzle guard frame 311 that surrounds the upper nozzle 42 is erected in the center of the lower basket 31 to prevent the dishes W1 placed therein from interfering with the upper nozzle 42.

図２を参照して、洗浄槽２の形状は、平面視でほぼ長方形である。ここで、この長方形の長辺に平行な方向をＸ軸方向（本実施形態では前後方向）、短辺に平行な方向をＹ軸方向（本実施形態では横方向）として、下ノズル４１の長手方向がＸ軸方向に沿う旋回位置（以下、Ｘ軸方向旋回位置と記す）における下ノズル４１の長手方向端部とこれに対向する洗浄槽２のＸ軸方向各側の壁面との間の距離が、下ノズル４１の長手方向がＹ軸方向に沿う旋回位置（以下、Ｙ軸方向旋回位置と記す）における下ノズル４１の長手方向端部とこれに対向する洗浄槽２のＹ軸方向各側の壁面との間の距離よりも長くなる。従って、洗浄槽２のＸ軸方向各側の壁面近傍に置かれた食器類の洗浄能力が不足し勝ちになる。 Referring to FIG. 2, the shape of the washing tank 2 is approximately rectangular in plan view. Here, the direction parallel to the long side of this rectangle is the X-axis direction (front-rear direction in this embodiment), and the direction parallel to the short side is the Y-axis direction (horizontal direction in this embodiment). The distance between the longitudinal end of the lower nozzle 41 at the rotation position where the longitudinal direction of the lower nozzle 41 is along the X-axis direction (hereinafter referred to as the X-axis rotation position) and the opposing wall surface on each side in the X-axis direction of the washing tank 2 is longer than the distance between the longitudinal end of the lower nozzle 41 at the rotation position where the longitudinal direction of the lower nozzle 41 is along the Y-axis direction (hereinafter referred to as the Y-axis rotation position) and the opposing wall surface on each side in the Y-axis direction of the washing tank 2. Therefore, the washing ability of dishes placed near the wall surface on each side in the X-axis direction of the washing tank 2 tends to be insufficient.

そこで、本実施形態では、洗浄ポンプ５から供給される洗浄水の下ノズル４１と上ノズル４２とへの分配比率を下ノズル４１の旋回位置に応じて可変する分配手段６を設けている。そして、分配手段６を、下ノズル４１のＸ軸方向旋回位置では、下ノズル４１のＹ軸方向旋回位置よりも、下ノズル４１からの洗浄水の噴射量（下ノズル４１の複数のノズル孔４１１，４１２からの洗浄水の合計噴射量）が多くなるように構成している。これによれば、洗浄能力が不足し勝ちな洗浄槽２のＸ軸方向各側の壁面近傍に置かれた食器類の洗浄能力を向上させることができる。 Therefore, in this embodiment, a distribution means 6 is provided that changes the distribution ratio of the washing water supplied from the washing pump 5 to the lower nozzle 41 and the upper nozzle 42 according to the rotational position of the lower nozzle 41. The distribution means 6 is configured so that the amount of washing water sprayed from the lower nozzle 41 (the total amount of washing water sprayed from the multiple nozzle holes 411, 412 of the lower nozzle 41) is greater at the rotational position of the lower nozzle 41 in the X-axis direction than at the rotational position of the lower nozzle 41 in the Y-axis direction. This makes it possible to improve the washing ability of tableware placed near the wall surfaces on each side of the X-axis direction of the washing tub 2, which tends to have insufficient washing ability.

以下、図３も参照して、分配手段６について詳述する。洗浄槽２の底部には、下ノズル４１の底板部４１ａの長手方向中央部に設けられた上方に凹入するソケット部４１３に下方から挿入される、洗浄ポンプ５に接続される中空のジョイント部材６１が設けられている。ジョイント部材６１は、下ノズル４１をソケット部４１３を介して旋回自在に支持する軸支部材としても機能している。 The distributor 6 will be described in detail below with reference to FIG. 3. A hollow joint member 61 connected to the cleaning pump 5 is provided at the bottom of the cleaning tank 2 and is inserted from below into a socket portion 413 that is recessed upward and provided in the longitudinal center of the bottom plate portion 41a of the lower nozzle 41. The joint member 61 also functions as a pivot member that supports the lower nozzle 41 so that it can rotate freely via the socket portion 413.

ジョイント部材６１の上端には、ソケット部４１３の上端に開設した上ノズル用連通口４１３ａを介して洗浄水を上ノズル４２に分配する上ノズル用分配口６２が開設されている。また、ジョイント部材６１の周面には、下ノズル４２の長手方向を向くソケット部４１３の周面部分に開設した下ノズル用連通口４１３ｂを介して洗浄水を下ノズル４１に分配する下ノズル用分配口６３が開設されている。そして、ジョイント部材６１により分配手段６が構成されている。このようにジョイント部材６１で分配手段６を構成すれば、構造が簡素化され、コストダウンを図る上で有利である。 At the upper end of the joint member 61, an upper nozzle distribution port 62 is opened, which distributes the cleaning water to the upper nozzle 42 via an upper nozzle communication port 413a opened at the upper end of the socket portion 413. In addition, at the peripheral surface of the joint member 61, a lower nozzle distribution port 63 is opened, which distributes the cleaning water to the lower nozzle 41 via a lower nozzle communication port 413b opened in the peripheral surface portion of the socket portion 413 facing the longitudinal direction of the lower nozzle 42. The distribution means 6 is then constituted by the joint member 61. Constituting the distribution means 6 with the joint member 61 in this way simplifies the structure, which is advantageous in terms of reducing costs.

ここで、下ノズル用分配口６３は、下ノズル４１のＸ軸方向旋回位置では、下ノズル４１のＹ軸方向旋回位置よりも、下ノズル４１からの洗浄水の噴射量が多くなるように、ジョイント部材６１の周方向位置によって開口面積が異なっている。より具体的に説明すれば、下ノズル４１がＸ軸方向旋回位置から下ノズル４１の旋回方向と逆方向に若干ずれた旋回位置に存するときに下ノズル用連通口４１３ｂに正対するジョイント部材６１の周面部分に開口面積の大きな第１の下ノズル用分配口６３１を開設し、また、下ノズル４１がＹ軸方向旋回位置から下ノズル４１の旋回方向と逆方向に若干ずれた旋回位置に存するときに下ノズル用連通口４１３ｂに正対するジョイント部材６１の周面部分に開口面積の小さな第２の下ノズル用分配口６３２を開設している。 Here, the opening area of the lower nozzle distribution port 63 varies depending on the circumferential position of the joint member 61 so that the amount of washing water sprayed from the lower nozzle 41 is greater at the X-axis direction pivotal position of the lower nozzle 41 than at the Y-axis direction pivotal position of the lower nozzle 41. More specifically, a first lower nozzle distribution port 63-1 with a large opening area is opened in a peripheral surface portion of the joint member 61 directly facing the lower nozzle communication port 413b when the lower nozzle 41 is at a pivotal position slightly shifted in the opposite direction to the pivotal direction of the lower nozzle 41 from the X-axis direction pivotal position, and a second lower nozzle distribution port 63-2 with a small opening area is opened in a peripheral surface portion of the joint member 61 directly facing the lower nozzle communication port 413b when the lower nozzle 41 is at a pivotal position slightly shifted in the opposite direction to the pivotal direction of the lower nozzle 41 from the Y-axis direction pivotal position.

これによれば、下ノズル４１がＸ軸方向旋回位置から下ノズル４１の旋回方向と逆方向に若干ずれた旋回位置に存するときに、第１の下ノズル用分配口６３１を介して下ノズル４１に洗浄水が分配されて、下ノズル４１への洗浄水の分配比率が最も大きくなり、下ノズル４１がＹ軸方向旋回位置から下ノズル４１の旋回方向と逆方向に若干ずれた旋回位置に存するときに、第２の下ノズル用分配口６３２を介して下ノズル４１に洗浄水が分配されて、下ノズル４１への洗浄水の分配比率が最も小さくなる。尚、下ノズル４１への洗浄水の分配比率が変化してから下ノズル４１からの洗浄水の噴射量が変化するまでには多少の応答遅れがある。従って、上記の如く下ノズル４１がＸ軸方向旋回位置から下ノズル４１の旋回方向と逆方向に若干ずれた旋回位置に存するときに、下ノズル４１への洗浄水の分配比率が最大になることで、下ノズル４１がＸ軸方向旋回位置に存するときに、下ノズル４１からの洗浄水の噴射量が最大になる。 According to this, when the lower nozzle 41 is in a rotation position slightly shifted from the X-axis direction rotation position in the opposite direction to the rotation direction of the lower nozzle 41, the cleaning water is distributed to the lower nozzle 41 through the first lower nozzle distribution port 63-1 , and the distribution ratio of the cleaning water to the lower nozzle 41 is the largest, and when the lower nozzle 41 is in a rotation position slightly shifted from the Y-axis direction rotation position in the opposite direction to the rotation direction of the lower nozzle 41, the cleaning water is distributed to the lower nozzle 41 through the second lower nozzle distribution port 63-2 , and the distribution ratio of the cleaning water to the lower nozzle 41 is the smallest. Note that there is a slight response delay between a change in the distribution ratio of the cleaning water to the lower nozzle 41 and a change in the amount of cleaning water sprayed from the lower nozzle 41. Therefore, as described above, when the lower nozzle 41 is in a rotation position slightly shifted from the X-axis direction rotation position in the opposite direction to the rotation direction of the lower nozzle 41, the distribution ratio of the cleaning water to the lower nozzle 41 becomes maximum, and therefore the amount of cleaning water sprayed from the lower nozzle 41 becomes maximum when the lower nozzle 41 is in the X-axis direction rotation position.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、第１と第２の各下ノズル用分配口６３１，６３２の形状が方形であるが、４隅にアールを付けた形状や楕円形であってもよい。また、ジョイント部材６１とソケット部４１３との間の隙間を上記実施形態のものよりも大きくし、ジョイント部材６１の外面に、上ノズル用分配口６２と第１と第２の下ノズル用分配口６３１，６３２とを夫々囲うようにして、ソケット部４１３の内面に近接対向する突条を突設し、或いは、ソケット部４１３の内面に、上ノズル用連通口４１３ａと下ノズル用連通口４１３ｂとを夫々囲うようにして、ジョイント部材６１の外面に近接対向する突条を突設してもよい。これによれば、ゴマなどの細かな残菜がジョイント部材６１とソケット部４１３との間の隙間に入っても、隙間が大きいため、下ノズル４１の旋回が妨げられることはなく、且つ、ジョイント部材６１とソケット部４１３との接触箇所が突条のみになって、摩擦が少なくなり、下ノズル４１がスムーズに旋回する。更に、下ノズル４１からの洗浄水の噴射量を、下ノズル４１がＸ軸方向旋回位置に存するときにＹ軸方向旋回位置に存するときよりも多くなるようにしつつ、下ノズル４１の長手方向が洗浄槽２の平面視形状である長方形の対角方向に沿う旋回位置に存するときに最大になるようにすることも可能である。 Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the shape of each of the first and second lower nozzle distribution ports 63 1 , 63 2 is rectangular, but it may be a shape with rounded corners or an ellipse. In addition, the gap between the joint member 61 and the socket portion 413 may be made larger than that in the above embodiment, and a protrusion may be provided on the outer surface of the joint member 61 so as to surround the upper nozzle distribution port 62 and the first and second lower nozzle distribution ports 63 1 , 63 2 , respectively, and to face closely to the inner surface of the socket portion 413, or a protrusion may be provided on the inner surface of the socket portion 413 so as to surround the upper nozzle communication port 413a and the lower nozzle communication port 413b, respectively, and to face closely to the outer surface of the joint member 61. With this, even if small food scraps such as sesame seeds get into the gap between the joint member 61 and the socket portion 413, the gap is large enough not to impede the rotation of the lower nozzle 41, and the only contact point between the joint member 61 and the socket portion 413 is the protrusion, reducing friction and allowing the lower nozzle 41 to rotate smoothly. Furthermore, it is also possible to make the amount of washing water sprayed from the lower nozzle 41 greater when the lower nozzle 41 is in the X-axis direction rotation position than when it is in the Y-axis direction rotation position, and to make the amount of washing water sprayed from the lower nozzle 41 maximum when the lower nozzle 41 is in the rotation position whose longitudinal direction is along the diagonal direction of the rectangle that is the planar shape of the washing tank 2.

２…洗浄槽、３…食器かご、４…洗浄ノズル、４１…下ノズル、４１３…ソケット部、４１３ａ…上ノズル用連通口、４１３ｂ…下ノズル用連通口、４２…上ノズル、５…洗浄ポンプ、６…分配手段、６１…ジョイント部材、６２…上ノズル用分配口、６３…下ノズル用分配口。 2... washing tank, 3... dish basket, 4... washing nozzle, 41... lower nozzle, 413... socket part, 413a... communication port for upper nozzle, 413b... communication port for lower nozzle, 42... upper nozzle, 5... washing pump, 6... distribution means, 61... joint member, 62... distribution port for upper nozzle, 63... distribution port for lower nozzle.

Claims (2)

食器類を支持する食器かごが収納された洗浄槽と、洗浄槽内に設けられた洗浄ノズルと、洗浄槽内の洗浄水を洗浄ノズルに供給する洗浄ポンプとを備える食器洗浄機であって、
洗浄ノズルは、洗浄槽の下部で水平方向にのび、長手方向中央部で鉛直軸線回りに旋回自在な下ノズルと、下ノズルの長手方向中央部に立設された上方にのびる上下動不能な上ノズルとを有し、洗浄槽の形状が平面視でほぼ長方形であるものにおいて、
洗浄ポンプから供給される洗浄水の下ノズルと上ノズルとへの分配比率を下ノズルの旋回位置に応じて可変する分配手段を備え、洗浄槽の平面視の形状である長方形の長辺に平行な方向をＸ軸方向、短辺に平行な方向をＹ軸方向として、分配手段は、下ノズルの長手方向がＸ軸方向に沿う旋回位置では、下ノズルの長手方向がＹ軸方向に沿う旋回位置よりも、下ノズルからの洗浄水の噴射量が多くなるように構成されることを特徴とする食器洗浄機。 A dishwasher comprising a washing tub in which a dish basket for supporting dishes is housed, a washing nozzle provided in the washing tub, and a washing pump for supplying washing water in the washing tub to the washing nozzle,
The cleaning nozzle has a lower nozzle extending horizontally below the cleaning tank and rotatable about a vertical axis at the longitudinal center, and an upper nozzle extending upward and erected at the longitudinal center of the lower nozzle so as to be immovable up and down , and the cleaning tank has a substantially rectangular shape in a plan view ,
A dishwasher comprising a distribution means which changes the distribution ratio of cleaning water supplied from a cleaning pump to a lower nozzle and an upper nozzle depending on the rotational position of the lower nozzle , and wherein the direction parallel to the long side of the rectangular shape of the cleaning tank when viewed in a plan view is the X-axis direction and the direction parallel to the short side is the Y-axis direction, and the distribution means is configured so that the amount of cleaning water sprayed from the lower nozzle is greater in a rotational position where the longitudinal direction of the lower nozzle is along the X-axis direction than in a rotational position where the longitudinal direction of the lower nozzle is along the Y-axis direction. 食器類を支持する食器かごが収納された洗浄槽と、洗浄槽内に設けられた洗浄ノズルと、洗浄槽内の洗浄水を洗浄ノズルに供給する洗浄ポンプとを備える食器洗浄機であって、
洗浄ノズルは、洗浄槽の下部で水平方向にのび、長手方向中央部で鉛直軸線回りに旋回自在な下ノズルと、下ノズルの長手方向中央部に立設された上方にのびる上ノズルとを有し、洗浄槽の形状が平面視でほぼ長方形であるものにおいて、
洗浄ポンプから供給される洗浄水の下ノズルと上ノズルとへの分配比率を下ノズルの旋回位置に応じて可変する分配手段を備え、洗浄槽の平面視の形状である長方形の長辺に平行な方向をＸ軸方向、短辺に平行な方向をＹ軸方向として、分配手段は、下ノズルの長手方向がＸ軸方向に沿う旋回位置では、下ノズルの長手方向がＹ軸方向に沿う旋回位置よりも、下ノズルからの洗浄水の噴射量が多くなるように構成され、
前記洗浄槽の底部に、前記下ノズルの底板部の長手方向中央部に設けられた上方に凹入するソケット部に下方から挿入される、前記洗浄ポンプに接続される中空のジョイント部材が設けられ、ジョイント部材の上端に、ソケット部の上端に開設した上ノズル用連通口を介して洗浄水を上ノズルに分配する上ノズル用分配口が開設されると共に、ジョイント部材の周面に、下ノズルの長手方向を向くソケット部の周面部分に開設した下ノズル用連通口を介して洗浄水を下ノズルに分配する下ノズル用分配口が開設されて、ジョイント部材で前記分配手段が構成され、下ノズルの長手方向が前記Ｘ軸方向に沿う旋回位置では、下ノズルの長手方向が前記Ｙ軸方向に沿う旋回位置よりも、下ノズルからの洗浄水の噴射量が多くなるように、ジョイント部材の周方向位置によって下ノズル用分配口の開口面積が異なることを特徴とする食器洗浄機。 A dishwasher comprising a washing tub in which a dish basket for supporting dishes is housed, a washing nozzle provided in the washing tub, and a washing pump for supplying washing water in the washing tub to the washing nozzle,
The cleaning nozzle has a lower nozzle extending horizontally below the cleaning tank and rotatable about a vertical axis at the longitudinal center, and an upper nozzle extending upward and erected at the longitudinal center of the lower nozzle, and the cleaning tank has a substantially rectangular shape in a plan view,
a distribution means for varying the distribution ratio of cleaning water supplied from the cleaning pump to the lower nozzle and the upper nozzle in accordance with the rotational position of the lower nozzle, the direction parallel to the long side of the rectangular shape of the cleaning tank in a plan view being the X-axis direction and the direction parallel to the short side being the Y-axis direction, and the distribution means is configured such that the amount of cleaning water sprayed from the lower nozzle is greater at a rotational position where the longitudinal direction of the lower nozzle is along the X-axis direction than at a rotational position where the longitudinal direction of the lower nozzle is along the Y-axis direction;
a hollow joint member connected to the washing pump is provided at the bottom of the washing tank and is inserted from below into a socket portion that is recessed upward and provided in the longitudinal center of the bottom plate portion of the lower nozzle, an upper nozzle distribution port is provided at the upper end of the joint member for distributing washing water to the upper nozzle via an upper nozzle communication port provided at the upper end of the socket portion, and a lower nozzle distribution port is provided on the circumferential surface of the joint member for distributing washing water to the lower nozzle via a lower nozzle communication port provided in the circumferential surface portion of the socket portion facing the longitudinal direction of the lower nozzle, and the distribution means is constituted by the joint member, and the opening area of the lower nozzle distribution port varies depending on the circumferential position of the joint member so that the amount of washing water sprayed from the lower nozzle is greater at a rotation position where the longitudinal direction of the lower nozzle is along the X-axis direction than at a rotation position where the longitudinal direction of the lower nozzle is along the Y-axis direction.
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