Dishwasher

Abstract

To provide a dishwasher efficiently supplying washing water flowing through a prescribed flow passage and rinsing water flowing through other flow passages to a jetting nozzle which jets the washing water and the rinsing water to an object to be washed.SOLUTION: A dishwasher includes: a washing tank storing an object to be washed; a jetting nozzle jetting washing water in the washing tank and rinsing water supplied from the outside of the washing tank to the object to be washed; and a support part supporting the jetting nozzle. The jetting nozzle is provided with: a rinsing water pipe part forming a rinsing water passage through which the rinsing water flows; and a washing water pipe part located at the outer peripheral side of the rinsing water pipe part and forming a washing water passage to the rinsing water pipe. The washing water pipe part is provided with an abutting part abutting to the support part. A gap is formed between the rinsing water pipe part and the support part of the jetting nozzle. An abutting part and the gap are provided so as to face the washing water flow passage. The abutting part is provided on a further downstream side than the gap in the washing water flow passage.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to dishwashers. [Background technology]

[0002] Patent Document 1 discloses a dishwasher that prevents washing water from mixing with rinsing water to ensure high rinsing efficiency. In the dishwasher of Patent Document 1, the rinse water supply port that supplies rinse water to the rinse nozzle is formed on the outside of the washing nozzle, thereby separating the rinse water flow path from the rinse water flow path. By separating them in this way, even if the nozzle is damaged, the rinse water can be prevented from entering the rinse nozzle, ensuring high rinsing efficiency. Furthermore, by forming a recess in the washing nozzle and storing the rinse nozzle in this recess, the nozzle height can be minimized, ensuring sufficient distance between the stored tableware and the nozzle. This allows rinse water to be sprayed evenly onto the tableware, ensuring even higher rinsing efficiency. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-009011 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a dishwasher in which washing water flowing through a specified flow path and rinsing water flowing through another flow path are efficiently supplied to a spray nozzle that sprays the washing water and rinsing water toward items to be washed. [Means for solving the problem]

[0005] The dishwasher of the present disclosure comprises a washing tub that contains items to be washed, a spray nozzle that sprays washing water from inside the washing tub and rinse water supplied from outside the washing tub toward the items to be washed, and a support part that supports the spray nozzle, and the spray nozzle is provided with a rinse water pipe part that forms a rinse water flow path through which rinse water flows, and a wash water pipe part that is located on the outer periphery of the rinse water pipe part and forms a wash water flow path between the rinse water pipe part and the spray nozzle, the wash water pipe part of the spray nozzle is provided with an abutment part that abuts against the support part, a gap is formed between the rinse water pipe part of the spray nozzle and the support part, the abutment part and the gap are arranged facing the wash water flow path, and the abutment part is arranged downstream of the gap in the wash water flow path. [Effects of the Invention]

[0006] According to the present invention, cleaning water flowing through a predetermined flow path and rinsing water flowing through another flow path are efficiently supplied to a spray nozzle that sprays the cleaning water and rinsing water toward an object to be cleaned. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing the structure of a dishwasher according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a perspective view showing a spray nozzle and a bearing of a dishwasher according to an embodiment of the present disclosure. [Figure 3] FIG. 1 is an exploded perspective view of a spray nozzle and a bearing of a dishwasher according to an embodiment of the present disclosure. [Figure 4] FIG. 1 is an exploded perspective view of a spray nozzle and a bearing of a dishwasher according to an embodiment of the present disclosure. [Figure 5] 3 is a cross-sectional view of the dishwasher according to the embodiment of the present disclosure taken along plane V in FIG. 2 . [Figure 6] 6 is a cross-sectional view of the dishwasher taken along plane VI of FIG. 2 according to an embodiment of the present disclosure; [Figure 7] Enlarged view of the area indicated by VII in Figure 6 [Figure 8] 3 is a cross-sectional view of a plane V in FIG. 2 according to a modification of the present disclosure; DETAILED DESCRIPTION OF THE INVENTION

[0008] (Findings that formed the basis of this disclosure) At the time the inventors came up with the idea for this disclosure, there was a technology in which, in a dishwasher equipped with a washing tank in which items to be washed, such as dishes, are stored and a spray nozzle that sprays washing water from inside the washing tank toward the items to be washed, a flow path through which washing water flows was provided in a support part that supports the spray nozzle.

[0009] However, the inventors discovered a problem with conventional dishwashers in that there was a risk of cleaning water leaking outside the flow path from the connection point between the spray nozzle and the support part, and in order to solve this problem, they came up with the subject matter of the present disclosure. Therefore, the present disclosure provides a dishwasher that can prevent wash water from leaking from a flow path through which the wash water flows.

[0010] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0011] (Embodiment 1) Embodiment 1 will be described below using Figures 1 to 7. In the description, directions such as front, back, left, right, and up and down are the same as those relative to the humidity-control dishwasher when installed and used, unless otherwise specified. Also, the symbol LH shown in each figure indicates the left side of the dishwasher 1 when installed and used, the symbol FR indicates the front of the dishwasher 1, and the symbol UP indicates the top of the dishwasher 1. In the installed state of the dishwasher 1, the up and down direction coincides with the vertical direction, and the front, back, left, and right directions coincide with the horizontal direction. [1-1.Configuration] [1-1-1. Dishwasher configuration]

[0012] Fig. 1 is a diagram showing the structure of a dishwasher 1 according to an embodiment of the present disclosure. Fig. 1 shows a schematic diagram of the internal structure of the dishwasher 1 when viewed from the front. 1, dishwasher 1 is an under-counter commercial dishwasher, and includes a housing 2 with an opening on the front. A door (not shown) that covers the opening is provided on the front of dishwasher 1 and can be opened and closed freely.

[0013] In the internal space of the housing 2, a flush water tank 10 that functions as a "wash tank" is provided on the upper side. A storage space S capable of storing tableware, which is an example of an "item to be washed," is provided on the upper side of the flush water tank 10. Below the storage space S in the flush water tank 10, a storage section 12 is provided in which wash water W1 for washing the tableware is stored.

[0014] Inside the housing 2, below the wash water tank 10, a wash water pump 20 and a rinse water pump 22 are arranged, which function as a pressurizing section. The flush water pump 20 is connected to the reservoir 12 via the water supply pipe 4, and after sucking in the flush water W1 stored in the reservoir 12, pressurizes it and sends it out again into the flush water tank 10, thereby performing pressurized circulation of the flush water W1. A rinse water tank 24 is connected to the rinse water pump 22 via a connection pipe 5. A water supply pipe 6 that communicates with the outside of the housing 2 is connected to the rinse water tank 24, and rinse water W2 is supplied from the outside via the water supply pipe 6. The rinse water pump 22 pressurizes the rinse water W2 stored in the rinse water tank 24 and sends it into the cleaning water tank 10.

[0015] A through-hole 9 is provided in the bottom of the flush water tank 10, and a bearing 26 is inserted into the through-hole. A spray nozzle 28 is attached to the bearing 26. The spray nozzle 28 is arranged inside the flush water tank 10. A washing water pump 20 is connected to the bearing 26 via a washing water pipe 7 , and a rinsing water pump 22 is connected to the bearing 26 via a rinsing water pipe 8 . The bearing 26 corresponds to the "support portion" of the present disclosure.

[0016] Fig. 2 is a perspective view showing the injection nozzle 28 and the bearing 26. Fig. 3 is an exploded perspective view of the injection nozzle 28 and the bearing 26 viewed from above. Fig. 4 is an exploded perspective view of the injection nozzle 28 and the bearing 26 viewed from below. 2 to 4, the bearing 26 is provided with a tubular first flush water pipe section 30 that extends in the vertical direction. The flush water piping 7 is connected to the lower end of the first flush water pipe section 30. Cleansing water that is pumped out by the cleansing water pump 20 via the cleansing water piping 7 flows through the first flush water pipe section 30. For this reason, the inside of the first flush water pipe section 30 functions as a cleansing water flow path P1, which is a flow path through which the cleansing water W1 flows.

[0017] A tubular first rinse water pipe 32 is provided in the bearing 26. The first rinse water pipe 32 extends in a direction intersecting the extension direction of the first flush water pipe 30, and penetrates the first flush water pipe 30 at a lower part of the side surface of the first flush water pipe 30. After penetrating the first flush water pipe 30, the penetrated first rinse water pipe 32 extends to approximately the center of the first flush water pipe 30 in a plan view, and then bends and extends upward. Therefore, the first rinse water pipe 32 is formed in a substantially L-shape when viewed from the front side of the housing 2. The upper end of the first rinse water pipe 32 extends higher than the upper end of the first flush water pipe 30. In the following description, the portion of the first rinsing water pipe section 32 that extends intersecting with the first cleaning water pipe section 30 is referred to as the horizontal flow path wall section 37, and the portion that is bent from the horizontal flow path wall section 37 and extends upward is referred to as the vertical flow path wall section 39. The vertical flow path wall section 39 corresponds to the "flow path wall section" in this disclosure.

[0018] In the first rinsing water pipe section 32, the rinsing water pipe 8 is connected to an end section 33 extending horizontally from the side surface of the first cleaning water pipe section 30. Rinse water W2 pumped out by the rinse water pump 22 via the rinse water piping 8 flows through the first rinse water pipe section 32. Therefore, the inside of the first rinse water pipe section 32 functions as a rinse water flow path P2.

[0019] The injection nozzle 28 has an elongated shape that extends horizontally while being supported by the bearing 26. The injection nozzle 28 is supported by the bearing 26 from below at approximately the center in the longitudinal direction. 4, a tubular second cleaning water pipe section 40 is provided in the center of the injection nozzle 28. The second cleaning water pipe section 40 protrudes downward from the lower surface of the injection nozzle 28. A tubular second rinse water pipe 42 is provided inside the second cleaning water pipe 40. The inside of the second rinse water pipe 42 is a tubular portion that functions as the rinse water flow path P2. The lower end of the second rinse water pipe 42 protrudes downward further than the lower end of the second cleaning water pipe 40.

[0020] When the spray nozzle 28 is attached to the bearing 26, the first rinse water pipe section 32 is inserted into the second rinse water pipe section 42. The lower end of the second cleaning water pipe section 40 and the upper end of the first cleaning water pipe section 30 abut against each other. As a result, the cleansing water W1 flows into the second cleansing water pipe section 40 via the first cleansing water pipe section 30. Therefore, the inside of the second cleansing water pipe section 40 functions as a cleansing water flow path P1, which is a flow path through which the cleansing water W1 flows. Rinse water W2 flows through the second rinse water pipe section 42 via the first rinse water pipe section 32. Therefore, the inside of the second rinse water pipe section 42 functions as a rinse water flow path P2.

[0021] A claw-shaped engaging portion 49 is provided on the underside of the injection nozzle 28 , and the engaging portion 49 engages with the outer surface of the first cleaning water pipe portion 30 . As a result, the injection nozzle 28 is rotatably supported by the bearing 26 .

[0022] 2 and 3, a plurality of openings, that is, washing nozzle ports 46 and a rinsing nozzle port 48, are provided on the upper surface of the spray nozzle 28. From the washing nozzle port 46, the washing water W1 flowing through the second washing water pipe section 40 is sprayed toward the washing water tank 10. From the rinsing nozzle port 48, the rinsing water W2 flowing through the second rinsing water pipe section 42 is sprayed toward the washing water tank 10.

[0023] Fig. 5 is a cross-sectional view taken along plane V in Fig. 2 as viewed from the left. Plane V intersects with the longitudinal direction of the spray nozzle 28 and passes through the vertical flow path wall 39 of the first rinsing water pipe section 32. Fig. 6 is a cross-sectional view taken along plane VI in Fig. 2 as viewed from the front. Plane VI passes through the horizontal flow path wall 37 and the vertical flow path wall 39. As shown in FIGS. 5 and 6, an internal space R is provided inside the injection nozzle .

[0024] In the bearing 26, a receiving portion 34 is provided at the upper end of the first cleaning water pipe section 30. The receiving portion 34 is formed with a diameter dimension longer than the lower portion of the first cleaning water pipe section 30, and a sliding surface 35 facing upward is provided at the lower end of the receiving portion 34. The sliding surface 35 is provided over the entire circumferential direction of the receiving portion 34. When the injection nozzle 28 is attached to the bearing 26, the abutment portion 44, which is the lower end portion of the second cleaning water pipe portion 40, abuts against the sliding surface 35 of the receiving portion 34 from above.

[0025] In the bearing 26, as described above, the first rinsing water pipe section 32 includes the vertical flow path wall section 39. In the vertical flow path wall section 39, the diameter dimension from the bent point to the midpoint is formed longer than the diameter dimension from the midpoint to the upper end. In the following description, in the vertical flow path wall portion 39, the portion with the longer diameter dimension is referred to as the large diameter portion 36, and the portion with the shorter diameter dimension is referred to as the small diameter portion 38. The outer diameter dimension of the small diameter portion 38 is formed smaller than the inner diameter dimension of the second rinsing water pipe portion 42, and the outer diameter dimension of the large diameter portion 36 is formed larger than the outer diameter dimension of the second rinsing water pipe portion 42.

[0026] When the spray nozzle 28 is attached to the bearing 26, the small diameter portion 38 enters the interior of the second rinse water pipe 42. As a result, the rinse water W2 pumped out by the rinse water pump 22 flows through the first rinse water pipe 32 and then through the second rinse water pipe 42. Therefore, the interior of the second rinse water pipe 42 functions as a rinse water flow path P2.

[0027] When the spray nozzle is attached to the bearing , the small diameter portion enters the inside of the second rinsing water pipe portion , and the second cleaning water pipe portion 40 enters the inside of the receiving portion . When the second rinse water pipe section 40 is inserted into the receiving section 34, the abutment section 44 abuts against the sliding surface 35. In this case, the lower end of the second rinse water pipe section 42 and the upper end of the large diameter section 36 are disposed with a gap G1 between them. The gap G1 is located below the sliding surface 35.

[0028] When the spray nozzle 28 is attached to the bearing 26, the cleaning water flow path P1 is separated from the rinsing water flow path P2 by the second rinsing water pipe section 42, the large diameter section 36, and the small diameter section 38. A gap G1 extending horizontally is provided between the second rinsing water pipe section 42 and the large diameter section 36, and a gap G2 extending vertically is provided between the second rinsing water pipe section 42 and the small diameter section 38.

[0029] In this way, gaps G1 and G2 are provided between the second rinse water pipe section 42 and the large diameter section 36 and the small diameter section 38, forming a labyrinth structure. This increases the flow path length of the gaps G1 and G2 that connect the rinse water flow path P1 and the rinse water flow path P2, increasing the flow path resistance. Therefore, in the dishwasher 1, the wash water W1 is prevented from flowing into the rinse water flow path P2. It should be noted that the second rinsing water pipe section 42 and the small diameter section 38 may be in contact with each other at least in part, provided that the spray nozzle 28 is rotatable.

[0030] The inner surface of the first flushing water pipe section 30 is formed in a tapered shape with a diameter that decreases from the lower end toward the position facing the gap G1. In other words, the distance L1 between the inner surface of the first flushing water pipe section 30 and the lower part of the large diameter section 36 is formed to be longer than the distance L2 between a location of the large diameter section 36 adjacent to the gap G1 and the inner surface of the first flushing water pipe section 30 facing that location.

[0031] This makes it possible to suppress pressure loss in the wash water flow path P1, suppress an increase in static pressure near the gap G1, and increase the flow rate near the gap G1 in the dishwasher 1. As a result, the dishwasher 1 prevents the wash water W1 from flowing into the gap G1.

[0032] The inner surface of the first cleaning water pipe section 30 is formed in a tapered shape with a diameter that increases from the position facing the gap G1 toward the sliding surface 35 of the bearing 26. In other words, the distance L3 between the inner surface of the first cleaning water pipe section 30 near the sliding surface 35 and the second rinsing water pipe section 42 facing this location is formed to be longer than the distance L2 between a location of the large diameter section 36 adjacent to the gap G1 and the inner surface of the first cleaning water pipe section 30 facing this location.

[0033] This makes it possible in the dishwasher 1 to suppress an increase in static pressure in the wash water flow path P1 at the location facing the gap G1 compared to the location adjacent to the sliding surface 35. In other words, the static pressure in the wash water flow path P1 at the location facing the gap G1 is lower than the location adjacent to the sliding surface 35, and therefore the dishwasher 1 prevents the wash water W1 from flowing into the gap G1.

[0034] FIG. 7 is an enlarged view of the area indicated by VII in FIG. As shown in FIG. 7, the lower end of the second rinsing water pipe section 42 is formed with a thickness dimension along the radial direction of the first cleaning water pipe section 30 that does not protrude further toward the cleaning water flow path P1 than the upper end of the large diameter section 36. This prevents a portion of the wash water W1 flowing through the wash water flow path P1 from being blocked by the second rinse water pipe section 42, and prevents the wash water W1 from flowing into the gap G1. Therefore, in the dishwasher 1, pressure loss in the wash water flow path P1 is suppressed, and the wash water W1 is prevented from flowing into the gap G1.

[0035] The distance L4 between the outer surface of the lower end of the second rinsing water pipe section 42 and the inner surface of the first cleaning water pipe section 30 facing the outer surface is longer than the distance L2. This makes it possible to suppress an increase in static pressure at the location of the gap G1 in the wash water flow path P1 compared to a location downstream of the location of the gap G1 in the dishwasher 1. In other words, the static pressure at the location of the gap G1 in the wash water flow path P1 is lower than that at a location downstream of the location of the gap G1 in the wash water flow path P1, so the dishwasher 1 prevents the wash water W1 from flowing into the gap G1.

[0036] The contact portion 44 is formed with a thickness dimension that does not protrude toward the cleaning water flow path P1 beyond the vicinity of the sliding surface 35 along the radial direction of the first cleaning water pipe section 30. Furthermore, the distance L5 between the contact portion 44 and the outer surface of the second rinsing water pipe section 42 that faces the contact portion 44 across the cleaning water flow path P1 is formed to be longer than the distance L3. As a result, a portion of the wash water W1 flowing through the wash water flow path P1 is blocked by the abutment portion 44, and is prevented from flowing into the gap between the abutment portion 44 and the sliding surface 35. Therefore, in the dishwasher 1, pressure loss in the wash water flow path P1 is suppressed, while the wash water W1 is prevented from leaking into the wash water tank 10 from the gap between the bearing 26 and the spray nozzle 28. Distances L1, L2, L3, L4, and L5 correspond to the "gap dimensions" in this disclosure. The direction in which distances L1, L2, L3, L4, and L5 extend coincides with the width direction of cleaning water flow path P1.

[0037] [1-2. Operation] The operation of the dishwasher 1 configured as above will now be described. In the dishwasher 1, after the dishes held in the basket or the like are placed in the storage space S, the following washing operation is started. First, wash water pump 20 is activated, and wash water W1 stored in storage section 12 is drawn into wash water pump 20. The drawn-in wash water W is pressurized by wash water pump 20 and sent out, flowing through wash water flow path P1. Wash water W1 sent to spray nozzle 28 is sprayed out from wash nozzle port 46 of rotating spray nozzle 28 toward the entire wash water tank 10, including the dishes to be washed. After washing the dishes, wash water W1 flows back into storage section 12 and is then drawn into wash water pump 20, where it circulates in the same manner thereafter.

[0038] After a predetermined period of washing, the washing water pump 20 stops, and the washing operation ends. After this, the rinsing operation starts. During the rinsing operation, the rinsing water pump 22 operates to take in rinsing water W2 from the rinsing water tank 24. The taken-in rinsing water W2 flows through the rinsing water flow path P2. The rinsing water W2 sent to the spray nozzle 28 is sprayed from the rinsing nozzle opening 48 of the rotating spray nozzle 28 toward the tableware and the wash water tank 10. After rinsing the tableware, the rinsing water W2 flows into the storage section 12 and is stored therein.

[0039] As described above, downstream of the cleaning water flow path P1, cleaning water W1 is sprayed from the cleaning nozzle port 46, so in the cleaning water flow path P1, the static pressure is higher downstream of the abutment portion 44 and the sliding surface 35. In the dishwasher 1 of this embodiment, the point in the wash water flow path P1 where the contact portion 44 and the sliding surface 35 come into contact is located downstream of the gap G1. As a result, bearing 26 and spray nozzle 28 are connected so that gap G1 is located at a position in wash water flow path P1 where static pressure is smaller. As a result, dishwasher 1 can prevent wash water W1 from flowing into gap G1 and into rinse water flow path P2.

[0040] [1-3. Effects, etc.] As described above, in this embodiment, dishwasher 1 comprises wash water tank 10 that accommodates items to be washed, spray nozzle 28 that sprays wash water W1 inside wash water tank 10 and rinse water W2 supplied from outside wash water tank 10 toward the items to be washed, and bearing 26 that supports spray nozzle 28. Spray nozzle 28 is provided with second rinse water pipe 42 that forms rinse water flow path P2 through which rinse water W2 flows, and second rinse water pipe 40 that is located on the outer periphery of second rinse water pipe 42 and forms wash water flow path P1 with second rinse water pipe 42. Second rinse water pipe 40 of spray nozzle 28 is provided with a contact portion 44 that abuts against bearing 26, and a gap G1 is formed between second rinse water pipe 42 of spray nozzle 28 and bearing 26, with abutment 44 and gap G1 facing wash water flow path P1. The contact portion 44 is provided downstream of the gap G1 in the cleaning water flow path P1.

[0041] According to this, bearing 26 and spray nozzle 28 are connected so that gap G1 is located at a position in wash water flow path P1 where static pressure is smaller. Therefore, in dishwasher 1, wash water W1 is prevented from flowing into gap G1, and hence into rinse water flow path P2.

[0042] As in this embodiment, the contact portion 44 and the second rinse water pipe portion 42 may be formed so as not to protrude further toward the rinse water flow path P1 than the bearing 26 in the width direction of the rinse water flow path P1. As a result, a portion of the wash water W1 flowing through the wash water flow path P1 is blocked by the second rinse water pipe section 42, preventing it from flowing into the gap G1. As a result, in the dishwasher 1, the wash water W1 is prevented from flowing into the gap G1 while suppressing pressure loss in the wash water flow path P1. Furthermore, part of the wash water W1 flowing through the wash water flow path P1 is prevented from being blocked by the second rinse water pipe section 42, and the wash water W1 is prevented from flowing into the gap G1. Therefore, in the dishwasher 1, pressure loss in the wash water flow path P1 is suppressed, while the wash water W1 is prevented from flowing into the gap G1.

[0043] As in this embodiment, the distance L3 may be set to be longer than the distance L2. This makes it possible in the dishwasher 1 to suppress an increase in static pressure in the wash water flow path P1 at the location facing the gap G1 more than at the location adjacent to the sliding surface 35. Therefore, in the dishwasher 1, the wash water W1 is prevented from flowing into the gap G1.

[0044] As in this embodiment, the distance L2 may be set to be shorter than the distance L1. This makes it possible to suppress pressure loss in the wash water flow path P1, while suppressing an increase in static pressure near the gap G1 and increasing the flow rate near the gap G1 in the dishwasher 1. As a result, the dishwasher 1 prevents the wash water W1 from flowing into the gap G1.

[0045] As in the present embodiment, bearing 26 includes a vertical flow path wall 39 that surrounds at least a portion of rinse water flow path P2 provided in bearing 26. Vertical flow path wall 39 includes a small diameter portion 38 and a large diameter portion 36 that is located upstream of small diameter portion 38 in rinse water flow path P2 and that is formed with a diameter dimension longer than small diameter portion 38 in the width direction of rinse water flow path P2. Second rinse water pipe 42 covers small diameter portion 38 from the outside and may be disposed opposite large diameter portion 36 in the flow direction of rinse water flow path P1. This increases the length of the gaps G1 and G2 that connect the wash water flow path P1 and the rinse water flow path P2, increasing the flow path resistance, which in turn prevents the wash water W1 from flowing into the rinse water flow path P2 in the dishwasher 1.

[0046] (Other embodiments) As described above, the first and second embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to these, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. Furthermore, it is also possible to combine the components described in the first and second embodiments to create new embodiments. Therefore, other embodiments will be exemplified below.

[0047] FIG. 8 is a cross-sectional view of a modified example taken along plane V in FIG. In the embodiment described above, the inner surface of the first cleaning water pipe section 30 is formed to have a tapered shape in which the diameter dimension becomes smaller from the lower end toward the position facing the gap G1. However, the present invention is not limited to this, and as shown in FIG. 8, the inner surface of the first cleaning water pipe section 30 may be formed so that the diameter dimension decreases in a stepped manner from the lower end toward the position facing the gap G1.

[0048] Furthermore, for example, in the above-described embodiment, the dishwasher is an under-counter type, but the present invention is not limited to this and may be a dishwasher of other types such as a door type or a hood type.

[0049] It should be noted that the above-described embodiments are intended to illustrate the technology of the present disclosure, and various modifications, substitutions, additions, omissions, etc. may be made within the scope of the claims or their equivalents.

[0050] (Addendum) The above description of the embodiments discloses the following techniques.

[0051] (Technology 1) A dishwasher comprising: a washing tank that accommodates items to be washed; a spray nozzle that sprays washing water from inside the washing tank and rinse water supplied from outside the washing tank toward the items to be washed; and a support part that supports the spray nozzle; the spray nozzle is provided with a rinse water pipe part that forms a rinse water flow path through which rinse water flows, and a wash water pipe part that is located on the outer periphery of the rinse water pipe part and forms a wash water flow path between the rinse water pipe part and the spray nozzle; the wash water pipe part of the spray nozzle is provided with an abutment part that abuts against the support part; a gap is formed between the rinse water pipe part of the spray nozzle and the support part; the abutment part and the gap are provided facing the wash water flow path; and the abutment part is provided downstream of the gap in the wash water flow path. According to this, the support part and the spray nozzle are connected so that the gap is positioned in the wash water flow path at a position where the static pressure is smaller, which prevents wash water from flowing into the gap and into the rinse water flow path in the dishwasher.

[0052] (Technology 2) A dishwasher according to Technology 1, wherein the contact portion and the rinse water pipe portion of the spray nozzle do not protrude further toward the wash water flow path than the support portion in the width direction of the wash water flow path. This prevents some of the wash water flowing through the wash water flow path from flowing into the gap, thereby preventing the wash water from flowing into the gap while suppressing pressure loss in the wash water flow path in the dishwasher.

[0053] (Technology 3) A dishwasher according to Technology 1 or Technology 2, in which the gap dimension of the cleaning water flow path at the point where the abutment portion faces is longer than the gap dimension of the cleaning water flow path at the point where the gap faces. This allows the dishwasher to suppress an increase in static pressure at the location of the wash water flow path facing the gap relative to the location facing the abutment portion, thereby preventing wash water from flowing into the gap.

[0054] (Technology 4) A dishwasher described in any one of Technology 1 to Technology 3, wherein the gap dimension of the cleaning water flow path at the point where the gap faces is shorter than the gap dimension of the cleaning water flow path downstream of the point where the gap faces. This allows the dishwasher to suppress pressure loss in the wash water flow path, suppress an increase in static pressure near the gap, and increase the flow rate near the gap, thereby preventing wash water from flowing into the gap.

[0055] (Technology 5) A dishwasher described in any one of Technology 1 to Technology 4, wherein the support portion includes a flow path wall portion surrounding at least a portion of the rinse water flow path provided on the support portion, the flow path wall portion including a small diameter portion and a large diameter portion located upstream of the small diameter portion in the rinse water flow path and having a diameter dimension longer than the small diameter portion in the width direction of the rinse water flow path, and the rinse water pipe portion of the spray nozzle covers the small diameter portion from the outside and is positioned opposite the large diameter portion in the flow direction of the rinse water flow path. This increases the length of the gap connecting the wash water flow path and the rinse water flow path, increasing the flow path resistance, which in turn prevents wash water from flowing into the rinse water flow path in the dishwasher. [Industrial Applicability]

[0056] The present disclosure is applicable to dishwashers in which a spray nozzle for spraying wash water is supported by a support part provided with a flow path through which the wash water flows, and specifically to commercial dishwashers. [Explanation of symbols]

[0057] 1 dishwasher 2. Case 4, 5 Connection piping 6 Water supply pipe 7 Cleaning water piping 8 Rinse water piping 9 Through holes 10 Cleaning water tank (cleaning tank) 12 Storage section 20 Washing water pump 22 Rinse water pump 24 Rinse water tank 26 Bearing (support part) 28 Injection Nozzle 30 First cleaning water pipe section 32 First rinse water pipe section 33 End 34 Receiving part 35 sliding surface 36 Large diameter section 37 Horizontal channel wall 38 Small diameter section 39 Vertical channel wall (channel wall) 40 Second cleaning water pipe section 42 Second rinse water pipe section 44 Contact part 46 Cleaning nozzle outlet 48 Rinse nozzle opening 49 Engagement part G1 Gap G2 gap L1, L2, L3, L4, L5 distance (gap dimensions) P1 Cleaning water flow path P2 Rinse water flow path R interior space S Storage space W1 Cleaning water W2 Rinse water

Claims

1. a cleaning tank for accommodating an object to be cleaned; a spray nozzle for spraying cleaning water from inside the cleaning tank and rinsing water supplied from outside the cleaning tank toward the object to be cleaned; a support portion that supports the injection nozzle; Equipped with The injection nozzle has a rinse water pipe portion that forms a rinse water flow path through which rinse water flows; a cleaning water pipe portion that is located on the outer circumferential side of the rinsing water pipe portion and forms a cleaning water flow path between the rinsing water pipe portion and the cleaning water pipe portion, The cleaning water pipe portion of the injection nozzle is provided with an abutment portion that abuts against the support portion, A gap is formed between the rinsing water pipe portion and the support portion of the spray nozzle, the abutment portion and the gap are provided facing the cleaning water flow path, The contact portion is provided downstream of the gap in the cleaning water flow path. Dishwasher.

2. The contact portion and the rinse water pipe portion of the spray nozzle do not protrude further toward the rinse water flow path than the support portion in the width direction of the rinse water flow path.

2. The dishwasher of claim 1.

3. The gap dimension of the cleaning water flow path at the location where the abutting portion faces is The gap is formed longer than the gap dimension of the cleaning water flow path at the facing portion. The dishwasher according to claim 1 or 2.

4. The gap dimension of the cleaning water flow path at the point where the gap faces is: The gap is formed shorter than the gap dimension of the cleaning water flow path downstream of the facing portion. The dishwasher according to claim 1 or 2.

5. The support portion includes a flow path wall portion that surrounds at least a portion of the rinsing water flow path provided in the support portion, The flow path wall portion is A small diameter portion; a large diameter portion located upstream of the small diameter portion in the rinse water flow path, the large diameter portion having a diameter dimension longer than the small diameter portion in the width direction of the gap of the rinse water flow path; Equipped with The rinse water pipe portion of the spray nozzle covers the small diameter portion from the outside and is disposed opposite the large diameter portion in the flow direction of the rinse water flow path. The dishwasher according to claim 1 or 2.

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