Dishwasher

Abstract

The present invention provides a tableware washing machine, which includes: a washing tank (2) capable of accommodating a tableware basket (3), a washing nozzle (4) provided in the washing tank (2), and a washing pump (5) for supplying washing water to the washing nozzle (4). The washing nozzle (4) has: a lower nozzle (41) that extends horizontally along the lower part of the washing tank (2) and can freely rotate around a vertical axis at the central part in the long side direction, and an upper nozzle (42) that is erected at the central part in the long side direction of the lower nozzle (41) and extends upward. The tableware washing machine includes: a distribution mechanism (6) 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 rotation position of the lower nozzle (41). Thereby, the washing ability of tableware placed at a specific part in the washing tank (2) can be improved.

Description

Technical Field

[0001] The present invention relates to a dishwashing machine, which includes a washing tank for accommodating a dish basket that supports dishes, a washing nozzle provided in the washing tank, and a washing pump for supplying washing water in the washing tank to the washing nozzle. Background Art

[0002] Conventionally, it has been well known that in such a dishwashing machine, as the washing nozzle, a nozzle having a lower nozzle and an upper nozzle that is erected at the central portion in the longitudinal direction of the lower nozzle and extends upward is used. The lower nozzle extends horizontally at the lower part of the washing tank and can freely rotate about a vertical axis at the central portion in the longitudinal direction (for example, refer to Patent Document 1).

[0003] However, when the shape of the washing tank is almost rectangular in a top view, when the direction parallel to the long side of the rectangle is taken as the X-axis direction and the direction parallel to the short side is taken as the Y-axis direction, the distance between the end portion in the longitudinal direction of the lower nozzle at the rotational position where the longitudinal direction of the lower nozzle is along the X-axis direction and the wall surface of the washing tank facing the end portion in the longitudinal direction (the wall surfaces on each side in the X-axis direction of the washing tank) is greater than the distance between the end portion in the longitudinal direction of the lower nozzle at the rotational position where the longitudinal direction of the lower nozzle is along the Y-axis direction and the wall surface of the washing tank facing the end portion in the longitudinal direction (the wall surfaces on each side in the Y-axis direction of the washing tank). Therefore, the washing ability of the dishes placed near the wall surfaces on each side in the X-axis direction of the washing tank is reduced.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2019-63334 Summary of the Invention

[0007] Therefore, in view of the above problems, an object of the present invention is to provide a dishwashing machine capable of improving the washing ability of dishes placed at specific positions in the washing tank.

[0008] To solve the above problems, the dishwashing machine of the present invention includes a washing tank for accommodating a dish basket that supports dishes, a washing nozzle provided in the washing tank, and a washing pump for supplying washing water in the washing tank to the washing nozzle. The washing nozzle has a lower nozzle that extends horizontally at the lower part of the washing tank and can freely rotate about a vertical axis at the central portion in the longitudinal direction, and an upper nozzle that is erected at the central portion in the longitudinal direction of the lower nozzle and extends upward. The feature lies in that it includes a distribution mechanism that changes the distribution ratio of the washing water supplied from the washing pump to the lower nozzle and the upper nozzle according to the rotational position of the lower nozzle.

[0009] According to the present invention, the distribution ratio of the cleaning water to the lower nozzle and the upper nozzle changes according to the rotational position of the lower nozzle, and the injection amount of the cleaning water from the lower nozzle at a specific rotational position of the lower nozzle is larger than that at other rotational positions. Therefore, the cleaning ability of tableware placed at a specific part in the cleaning tank corresponding to the specific rotational position of the lower nozzle can be improved.

[0010] For example, when the shape of the cleaning tank is substantially rectangular in plan view, when the direction parallel to the long side of the rectangle is taken as the X-axis direction and the direction parallel to the short side is taken as the Y-axis direction, if the distribution mechanism is configured such that the injection amount of the cleaning water from the lower nozzle at the rotational position along the X-axis direction in the long side direction of the lower nozzle is larger than the injection amount at the rotational position along the Y-axis direction in the long side direction of the lower nozzle, the cleaning ability of tableware placed near the wall surfaces on both sides in the X-axis direction of the cleaning tank where the cleaning ability is often insufficient can be improved.

[0011] In addition, in order to simplify the structure of the distribution mechanism, the distribution mechanism may be configured as follows. That is, a hollow connecting member connected to a cleaning pump is provided at the bottom of the cleaning tank, and the connecting member is inserted from below into a receiving portion provided at the central portion in the long side direction of the bottom plate portion of the lower nozzle and recessed upward. At the upper end of the connecting member, an upper nozzle distribution port for distributing the cleaning water to the upper nozzle through an upper nozzle communication port opened at the upper end of the receiving portion is opened, and on the circumferential surface of the connecting member, a lower nozzle distribution port for distributing the cleaning water to the lower nozzle through a lower nozzle communication port opened at the circumferential surface portion of the receiving portion facing the long side direction of the lower nozzle is opened, and the connecting member constitutes the distribution mechanism. Moreover, as long as the opening area of the lower nozzle distribution port is different according to the circumferential position of the connecting member so that the injection amount of the cleaning water from the lower nozzle at the rotational position along the X-axis direction in the long side direction of the lower nozzle is larger than the injection amount at the rotational position along the Y-axis direction in the long side direction of the lower nozzle. Description of the Drawings

[0012] Figure 1 is a sectional side view of a tableware washing machine according to an embodiment of the present invention.

[0013] Figure 2 is a sectional plan view taken along line II-II in Figure 1 obtained by sectioning.

[0014] Figure 3 is a perspective view of the separated state of the lower nozzle and the connecting member provided in the tableware washing machine according to the embodiment.

[0015] Description of the Reference Numerals

[0016] 2... Cleaning tank; 3... Tableware basket; 4... Cleaning nozzle; 41... Lower nozzle; 413... Receiving part; 413a... Communication port for upper nozzle; 413b... Communication port for lower nozzle; 42... Upper nozzle; 5... Cleaning pump; 6... Distribution mechanism; 61... Connecting component; 62... Distribution port for upper nozzle; 63... Distribution port for lower nozzle. Detailed implementation mode

[0017] Figure 1 The tableware washing machine according to the embodiment of the present invention shown is an embedded tableware washing machine installed in a combined kitchen, and it includes: a cleaning tank 2 that is accommodated in a housing 1 with an open front surface in a manner that can be freely pulled forward. In the cleaning tank 2, there is accommodated: a tableware basket 3 for supporting tableware, and there is also provided: a cleaning nozzle 4 for spraying cleaning water onto the tableware basket 3. In addition, a front cover 21 for blocking the front surface of the housing 1 is installed on the front surface of the cleaning tank 2. In addition, a sealing cover 11 for blocking the open upper surface of the cleaning tank 2 is provided in the upper part of the housing 1.

[0018] At the bottom of the cleaning tank 2, there is provided: a water accumulation part 23 of cleaning water that communicates with the inside of the cleaning tank 2 via a leftover food filter 22. Below the bottom of the cleaning tank 2, there is provided: a cleaning pump 5 that communicates with the water accumulation part 23. And when the cleaning pump 5 rotates forward, the cleaning water in the cleaning tank 2 will be supplied to the cleaning nozzle 4 via the water accumulation part 23 and the cleaning pump 5, and when the cleaning pump 5 rotates in reverse, the cleaning water will be discharged from the cleaning tank 2.

[0019] The cleaning nozzle 4 has: a lower nozzle 41 that extends horizontally in the lower part of the cleaning tank 2 and can freely rotate around a vertical axis at the central part in the long side direction; and a central nozzle 42 that is erected at the central part in the long side direction of the lower nozzle 41 and extends upward. The lower nozzle 41 sprays cleaning water from a plurality of nozzle holes 411 formed in the lower nozzle 41. In addition, nozzle holes 412 are formed near each end in the long side direction of the lower nozzle 41, and due to the jet reaction force of the cleaning water from the nozzle holes 412 in the tangential direction of rotation, the lower nozzle 41 rotates Figure 2 in the clockwise direction in. The upper nozzle 42 sprays cleaning water from a plurality of nozzle holes 421 formed in its upper part.

[0020] In addition, as the tableware basket 3, a lower basket 31 and an upper basket 32 are provided. Among them, the lower basket 31 is disposed below the cleaning tank 2 and is located above the lower nozzle 41, and is used to support relatively large tableware such as large plates, small plates, medium bowls, and bowls W1. The upper basket 32 is disposed above the cleaning tank 2 and is located at a part adjacent to the rear of the upper nozzle 42, and is used to support bottomed cylindrical tableware W2 represented by cups or teacups. At the central part of the lower basket 31, a nozzle guard frame 311 surrounding the central nozzle 42 is erected so as to prevent the situation where the tableware W1 placed on the lower basket 31 interferes with the upper nozzle 42.

[0021] Referring to Figure 2 , the shape of the cleaning tank 2 is almost rectangular when viewed from above. Here, when the direction parallel to the long side of the rectangle is taken as the X-axis direction (the front-rear direction in this embodiment) and the direction parallel to the short side is taken as the Y-axis direction (the lateral direction in this embodiment), the distance between the end of the long side direction of the lower nozzle 41 at the rotational position of the long side direction of the lower nozzle 41 along the X-axis direction (hereinafter referred to as the X-axis direction rotational position) and the wall surfaces on each side of the cleaning tank 2 in the X-axis direction opposite to the end of the long side direction is greater than the distance between the end of the long side direction of the lower nozzle 41 at the rotational position of the long side direction of the lower nozzle 41 along the Y-axis direction (hereinafter referred to as the Y-axis direction rotational position) and the wall surfaces on each side of the cleaning tank 2 in the Y-axis direction opposite to the end of the long side direction. Therefore, the cleaning ability of the tableware placed near the wall surfaces on each side of the cleaning tank 2 in the X-axis direction is often insufficient.

[0022] Therefore, in this embodiment, a distribution mechanism 6 is provided in which the distribution ratio of the cleaning water supplied from the cleaning pump 5 to the lower nozzle 41 and the upper nozzle 42 changes according to the rotational position of the lower nozzle 41. Moreover, the distribution mechanism 6 is configured such that the injection amount of the cleaning water from the lower nozzle 41 when injecting at the X-axis direction rotational position of the lower nozzle 41 is more than the injection amount when injecting at the Y-axis direction rotational position of the lower nozzle 41 (the total injection amount of the cleaning water from the plurality of nozzle holes 411, 412 of the lower nozzle 41). Accordingly, the cleaning ability of the tableware placed near the wall surfaces on each side of the cleaning tank 2 in the X-axis direction where the cleaning ability is often insufficient can be improved.

[0023] Next, still referring to Figure 3 , the distribution mechanism 6 will be described in detail. A hollow connecting member 61 connected to the cleaning pump 5 is provided at the bottom of the cleaning tank 2, and the connecting member 61 is inserted from below into a receiving portion 413 provided at the central portion of the long side direction of the bottom plate portion 41a of the lower nozzle 41 and recessed upward. The connecting member 61 functions as a shaft support member that can support the lower nozzle 41 rotatably by means of the receiving portion 413.

[0024] At the upper end of the connecting member 61, there is an opening provided with an upper nozzle distribution port 62 for distributing the cleaning water to the upper nozzle 42 via an upper nozzle communication port 413a opened at the upper end of the receiving portion 413. Further, on the circumferential surface of the connecting member 61, there is an opening provided with a lower nozzle distribution port 63 for distributing the cleaning water to the lower nozzle 41 via a lower nozzle communication port 413b opened at a circumferential surface portion of the receiving portion 413 in the long side direction facing the lower nozzle 42. Moreover, the distribution mechanism 6 is constituted by the connecting member 61. As long as the distribution mechanism 6 is constituted by the connecting member 61 in this way, the structure can be simplified, which is beneficial to cost reduction.

[0025] Here, the opening area of the lower nozzle distribution port 63 varies according to the circumferential position of the connecting member 61 so that the injection amount of the cleaning water from the lower nozzle 41 at the X-axis direction rotation position of the lower nozzle 41 is more than the injection amount at the Y-axis direction rotation position of the lower nozzle 41. If described in more detail, when the lower nozzle 41 is at a rotation position slightly deviated from the X-axis direction rotation position in the direction opposite to the rotation direction of the lower nozzle 41, at the circumferential surface portion of the connecting member 61 facing the lower nozzle communication port 413b, there is an opening provided with a first lower nozzle distribution port 631 having a larger opening area. Further, when the lower nozzle 41 is at a rotation position slightly deviated from the Y-axis direction rotation position in the direction opposite to the rotation direction of the lower nozzle 41, at the circumferential surface portion of the connecting member 61 facing the lower nozzle communication port 413b, there is an opening provided with a second lower nozzle distribution port 632 having a smaller opening area.

[0026] Accordingly, when the lower nozzle 41 is at a rotation position slightly deviated from the X-axis direction rotation position in the direction opposite to the rotation direction of the lower nozzle 41, the cleaning water is distributed to the lower nozzle 41 via the first lower nozzle distribution port 631, and the distribution ratio of the cleaning water distributed to the lower nozzle 41 becomes the maximum. When the lower nozzle 41 is at a rotation position slightly deviated from the Y-axis direction rotation position in the direction opposite to the rotation direction of the lower nozzle 41, the cleaning water is distributed to the lower nozzle 41 via the second lower nozzle distribution port 632, and the distribution ratio of the cleaning water distributed to the lower nozzle 41 becomes the minimum. Further, after the distribution ratio of the cleaning water distributed to the lower nozzle 41 changes, until the injection amount of the cleaning water from the lower nozzle 41 changes, the response is somewhat delayed. Therefore, as described above, when the lower nozzle 41 is at a rotation position slightly deviated from the X-axis direction rotation position in the direction opposite to the rotation direction of the lower nozzle 41, the distribution ratio of the cleaning water distributed to the lower nozzle 41 becomes the maximum. Thus, when the lower nozzle 41 is at the X-axis direction rotation position, the injection amount of the cleaning water from the lower nozzle 41 is the maximum.

[0027] As described above, although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited thereto. For example, in the above embodiment, although the shapes of the first lower nozzle distribution port 631 and the second lower nozzle distribution port 632 are square, they may also be shapes with rounded corners at the four corners or oval shapes. In addition, the gap between the connecting member 61 and the receiving portion 413 may be made larger than the relevant gap in the above embodiment, and a ridge that is opposed to the inner surface of the receiving portion 413 in a manner that surrounds the upper nozzle distribution port 62, the first lower nozzle distribution port 631, and the second lower nozzle distribution port 632, respectively, may be protrudingly provided on the outer surface of the connecting member 61. Alternatively, a ridge that is opposed to the outer surface of the connecting member 61 in a manner that surrounds the upper nozzle communication port 413a and the lower nozzle communication port 413b, respectively, may be protrudingly provided on the inner surface of the receiving portion 413. Accordingly, even if fine leftovers such as sesame seeds enter the gap between the connecting member 61 and the receiving portion 413, since the gap is large, it will not hinder the rotation of the lower nozzle 41. Moreover, since only the ridges are in contact with each other between the connecting member 61 and the receiving portion 413, the friction is small, and thus the lower nozzle 41 can rotate smoothly. In addition, the amount of cleaning water ejected from the lower nozzle 41 when the lower nozzle 41 is in the X-axis direction rotation position may be made more than the amount of cleaning water ejected when the lower nozzle 41 is in the Y-axis direction rotation position, and the amount may be maximized when the lower nozzle 41 is in the rotation position where the long side direction of the lower nozzle 41 is along the diagonal direction of the rectangular shape when viewed from above the cleaning tank 2.

[0028] Alternatively, even if the shape of the cleaning tank 2 is almost square when viewed from above, when difficult-to-clean tableware is placed at a specific portion in the cleaning tank 2, the amount of cleaning water ejected from the lower nozzle 41 may be maximized when the lower nozzle 41 is in the rotation position where the cleaning water is ejected toward the specific portion.

Claims

1. A tableware washing machine, comprising: a washing tank for receiving a tableware basket that supports tableware; a washing nozzle disposed in the washing tank; and a washing pump for supplying washing water in the washing tank to the washing nozzle. The washing nozzle has: a lower nozzle that extends horizontally along the lower part of the washing tank and can freely rotate about a vertical axis at the central part in the long side direction; and an upper nozzle that is erected at the central part in the long side direction of the lower nozzle and extends upward without being able to move up and down. The shape of the washing tank is almost rectangular when viewed from above. It is characterized in that The tableware washing machine includes a distribution mechanism that changes the distribution ratio of the washing water supplied from the washing pump to the lower nozzle and the upper nozzle according to the rotational position of the lower nozzle. When the direction parallel to the long side of the rectangle, which is the shape of the washing tank when viewed from above, is defined as the X-axis direction and the direction parallel to the short side is defined as the Y-axis direction, the distribution mechanism is configured such that the ejection amount of the washing water from the lower nozzle in the rotational position along the X-axis direction in the long side direction of the lower nozzle is greater than the ejection amount in the rotational position along the Y-axis direction in the long side direction of the lower nozzle.

2. The tableware washing machine according to claim 1, characterized in that 、 A hollow connection member connected to the washing pump is provided at the bottom of the washing tank, and the connection member is inserted from below into a receiving portion provided at the center of the long side direction of the bottom plate portion of the lower nozzle and recessed upward. At the upper end of the connection member, an upper nozzle distribution port that distributes the washing water to the upper nozzle through an upper nozzle communication port opened at the upper end of the receiving portion is opened, and on the circumferential surface of the connection member, a lower nozzle distribution port that distributes the washing water to the lower nozzle through a lower nozzle communication port opened at the circumferential surface portion of the receiving portion facing the long side direction of the lower nozzle is opened. The connection member constitutes the distribution mechanism. The opening area of the lower nozzle distribution port varies according to the circumferential position of the connection member so that the ejection amount of the washing water from the lower nozzle in the rotational position along the X-axis direction in the long side direction of the lower nozzle is greater than the ejection amount in the rotational position along the Y-axis direction in the long side direction of the lower nozzle.

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