Washing machine

Abstract

To provide a washer capable of efficiently converting a water flow generated in a flow path formed at a nozzle into rotational force without wasting water as much as possible.SOLUTION: A dishwasher 100 comprises a body part 30 or 40 in which washing injection holes 31 or 41, a washing flow path 32 or 42, rinsing injection holes 33 or 43 and a rinsing flow path 34 or 44 are integrally formed. The washing flow path includes a first inflow part 32a or 42a passing through a rotation center and extending in a first direction D1 along a radial direction, and a first curved part 32b or 42b extending from the first inflow part so as to curve convexly forward in the rotational direction. The rinsing flow path includes a second inflow part 34a or 44a passing the rotation center and extending in a second direction D2 so as to cross the first direction along the radial direction, and a second curved part 34b or 44b extending from the second inflow part so as to curve convexly forward in the rotational direction and along the first curved part.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a cleaning machine for cleaning objects to be cleaned such as tableware.

Background Art

[0002] There is known a cleaning machine (dishwasher) that performs cleaning by spraying the cleaning water stored in a cleaning tank onto tableware housed in a cleaning chamber, and performs rinsing by spraying the rinsing water stored in a rinsing tank onto the tableware. In such a cleaning machine, a nozzle having injection holes for injecting water is rotatably provided in the cleaning chamber. As such a nozzle, Patent Document 1 discloses a nozzle (rotating blade) in which a flow path for water supplied from a cleaning tank during cleaning and a cleaning injection hole for injecting the water, and a flow path for water supplied from a rinsing tank during rinsing and a rinsing injection hole for injecting the water are integrally formed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the case of a nozzle in which the cleaning injection hole and the rinsing injection hole are integrated, the size and weight increase, and the rotational force of the nozzle tends to be insufficient. For this reason, in the nozzle described in Patent Document 1, injection holes for injecting water for supplementing the rotational force are provided separately from the cleaning injection hole and the rinsing injection hole. However, the water injected from such injection holes does not contribute to the efficiency of cleaning and rinsing of the tableware, so the water is wasted.

[0005] Therefore, an object of the present invention is to provide a cleaning machine that can efficiently convert the flow of water generated in the flow path formed in the nozzle into rotational force without wasting water as much as possible.

Means for Solving the Problem

[0006] The washing machine of the present invention is a washing machine provided in a washing chamber for accommodating an object to be washed, and includes a nozzle that sprays water into the washing chamber while rotating in one direction. The nozzle has a main body portion that extends from a base end portion, which is the center of rotation of the rotation axis of the nozzle, to a tip end portion along the radial direction, and the tip end portion side is curved backward in the rotation direction of the nozzle. The main body portion integrally forms a washing injection hole for injecting washing water, a washing flow path that extends from the center of rotation to the washing injection hole and through which the washing water flows, a rinsing injection hole for injecting rinsing water, and a rinsing flow path that extends from the center of rotation to the rinsing injection hole and through which the rinsing water flows. The washing flow path has a first inflow portion that passes through the center of rotation and extends in a first direction along the radial direction, and a first curved portion that extends from the first inflow portion so as to be convex forward in the rotation direction. The rinsing flow path has a second inflow portion that passes through the center of rotation and extends in a second direction intersecting the first direction along the radial direction, and a second curved portion that extends from the second inflow portion so as to be convex forward in the rotation direction and along the first curved portion.

[0007] In the washing flow path of the washing machine having this configuration, since the water flowing into the first inflow portion acts on the first curved portion that is convex forward in the rotation direction, the flow of water generated in the washing flow path can be efficiently converted into the rotational force of the nozzle. Also, in the washing flow path of this configuration, since the water flowing into the second inflow portion acts on the second curved portion that is convex forward in the rotation direction, the flow of water generated in the rinsing flow path can be efficiently converted into the rotational force of the nozzle. As a result, the flow of water generated in the flow path formed in the nozzle can be efficiently converted into rotational force without wasting water as much as possible.

[0008] In the washing machine of the present invention, the washing flow path and the rinsing flow path may extend from the base end portion to the tip end portion without curving so as to be convex backward in the rotation direction. In this configuration, it is possible to prevent the attenuation of the rotational force caused by the water flowing into the first inflow portion (or the second inflow portion) acting on the portion that is convex backward in the rotation direction.

[0009] The washing machine of the present invention further includes a detaching mechanism for detaching the main body from a support provided in the washing chamber. When a direction that passes through the center of rotation and intersects both the first direction and the second direction along the radial direction is defined as the third direction, the detaching mechanism has a pair of knob portions arranged to face each other in the third direction, and the main body can be detachably provided from the support by pressing both of the pair of knob portions in a direction approaching each other along the third direction. In this configuration, since the knob portions are provided so as to face the third direction that intersects both the first direction and the second direction, the size of the knob portions can be increased.

[0010] In the washing machine of the present invention, when a direction that is orthogonal to the third direction and passes through the center of rotation and along the radial direction is defined as the fourth direction, one of the first direction and the second direction may be a direction between the third direction and the fourth direction in the rotational direction, and the other of the first direction and the second direction may be a direction between the fourth direction and the third direction in the rotational direction. In this configuration, the extending directions of the first inflow portion and the second inflow portion can be appropriately made different, so that these two flow paths can be easily formed without interference.

[0011] In the washing machine of the present invention, the first direction, the second direction, and the third direction may be shifted by approximately 60° each in the rotational direction. In this configuration, while ensuring the washing flow path and the rinsing flow path, a space for installing the knob portions can be obtained. Therefore, even if the distance between the knob portions in the third direction is shortened, the size in the width direction of the knob portions can be increased. As a result, the knob portions can be made easy for an operator to grip.

[0012] In the washing machine of the present invention, when the main body is viewed in plan, the rinsing flow path and the washing flow path are arranged in the order of the rinsing flow path and the washing flow path around the rotational direction with the third direction as a reference, and the degree of bending of the first bending portion may be larger than the degree of bending of the second bending portion. In this configuration, particularly, the bending in the washing flow path, that is, the bending from the first inflow portion to the first bending portion can be increased, so that the action of the water flowing into the first inflow portion on the first bending portion becomes larger. As a result, the flow of water generated in the flow path formed in the nozzle can be converted into rotational force more efficiently.

[0013] In the dishwasher of the present invention, the outer shape of both end portions in the third direction passing through the rotation center in the main body portion is formed in a concave shape toward the rotation center, and the knob portion may protrude in the third direction from the concave outer shape. With this configuration, the distance between the pair of knob portions can be shortened, so that the attachment / detachment operation can be performed with one hand.

[0014] In the dishwasher of the present invention, the cleaning injection holes may be provided on the front side in the rotation direction of the cleaning flow path and may be arranged in a plurality along the extending direction of the cleaning flow path. With this configuration, the cleaning water remaining in the cleaning flow path after the rinsing step can be reduced. As a result, it is possible to reduce the dripping of the water remaining in the cleaning flow path from the cleaning injection holes after the rinsing step. Note that the water discharged from the cleaning injection holes during the rinsing step is washed away by the water sprayed from the rinsing injection holes even if it adheres to the object to be cleaned.

Effect of the Invention

[0015] According to the present invention, it is possible to efficiently convert the water flow generated in the flow path formed in the nozzle into rotational force without wasting water as much as possible.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, a dishwasher (cleaning machine) 100 according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same reference numerals are assigned to the same elements, and redundant descriptions are omitted. For convenience of explanation, in FIG. 1, the front-rear direction, the left-right direction, and the up-down direction are set respectively.

[0018] As shown in FIG. 1, the dishwasher 100 according to an embodiment is an under-counter type cleaning machine in which a door portion 15 is provided on the front surface of a cleaning chamber 1B. As shown in FIGS. 1 and 2, the dishwasher 100 includes a cleaning machine main body portion 1, a door portion 15, a cleaning tank 20, an upper nozzle 3, a lower nozzle 4, a cleaning pump 5, a rinsing tank 6, a rinsing pump 7, a detergent supply pump 8, a rinse aid supply pump 9, and a controller 10.

[0019] The cleaning machine main body portion 1 is formed including a frame (not shown), a stainless steel exterior panel 11, and an interior panel (wall portion) 2. The exterior panel 11 has a pair of side panel portions 11A, 11A forming side surfaces in the left-right direction, an upper panel 11B, an upper front panel 11C, a lower front panel 11D, and a rear panel 11E. At least the lower front panel 11D is provided so as to be easily detachable from the frame. Legs 12 are attached to the four corners of the lower portion of the cleaning machine main body portion 1. An operation portion 13 for operating various operations of the dishwasher 100 is provided on the upper front panel 11C.

[0020] The operation unit 13 is a part for performing input operations of the operation mode and various settings. The operation unit 13 of this embodiment is composed of a liquid crystal screen and a strengthened glass (electrostatic switch) covering the liquid crystal screen. An operator can perform various operations by touching the strengthened glass covering the liquid crystal screen. Note that the operation unit 13 may be composed of various buttons or a touch panel, or may be composed of a remote controller, an operation terminal, etc. separate from the dishwasher main body 1.

[0021] In the lower region of the dishwasher main body 1, a machine room 1A for accommodating a washing pump 5, a rinsing tank 6, a rinsing pump 7, a detergent supply pump 8, and a rinse aid supply pump 9 is formed. In the upper region of the dishwasher main body 1, a washing chamber 1B for accommodating a rack on which tableware (objects to be washed) D etc. are set is formed. The washing chamber 1B is a space above the washing tank 20 and is composed of an interior panel 2. The interior panel 2 mainly has a pair of side panels 2A, 2A, an upper panel 2B, and a rear panel (not shown). Rack rails 23 for supporting the rack are formed on the inner surfaces of the pair of side panels 2A, 2A. An opening 1C for taking in and out a rack on which tableware D etc. are set is formed in the dishwasher main body 1. The rack rails 23 may be integrally formed with the side panels 2A, 2A by extrusion processing, or may be formed by attaching other members to the inner surfaces of the side panels 2A, 2A.

[0022] The door part 15 is arranged outside the opening 1C. The door part 15 is provided so as to be able to open and close the opening 1C. When the door part 15 is opened, the washing chamber 1B is opened to the outside of the dishwasher main body 1. The door part 15 is rotatably provided with a shaft extending in the left - right direction at the lower end of the door part 15 as a rotation axis. An operator can open the washing chamber 1B by tilting forward a handle 15A provided at the upper end of the door part 15.

[0023] The cleaning tank 20 is provided below the cleaning chamber 1B. The cleaning tank 20 stores the cleaning water used for cleaning tableware D and the like accommodated in the cleaning chamber 1B. The cleaning water is the water sprayed into the cleaning chamber 1B in the cleaning process. The cleaning tank 20 is provided with a cleaning water detection unit 24, a cleaning water heater 25A, and a cleaning water temperature sensor 25B.

[0024] The cleaning water detection unit 24 detects the water level of the cleaning water stored in the cleaning tank 20. The cleaning water detection unit 24 is, for example, a switch that turns ON when the water level in the cleaning tank 20 exceeds the fixed water level H1 and turns OFF when it is below the fixed water level H1. The detection result by the cleaning water detection unit 24 is acquired by the controller 10. When the cleaning pump 5, which will be described in detail later, sucks in air during operation, so-called air biting occurs and the cleaning water cannot be sprayed from the upper nozzle 3 and the lower nozzle 4. In one embodiment, when the cleaning water detection unit 24 turns OFF during operation, the operation of the cleaning pump 5 is stopped to prevent the cleaning pump 5 from sucking in air.

[0025] The cleaning water heater 25A heats the cleaning water stored in the cleaning tank 20 in order to improve the sterilization ability and the cleaning ability. The cleaning water temperature sensor 25B detects the temperature of the cleaning water stored in the cleaning tank 20. The detection result by the cleaning water temperature sensor 25B is acquired by the controller 10. The ON / OFF of the cleaning water heater 25A is controlled by the controller 10. For example, the cleaning water heater 25A is controlled by the controller 10 so as to maintain the cleaning water at a predetermined temperature based on the water temperature detected by the cleaning water temperature sensor 25B.

[0026] A circular through-hole 20b is formed in the bottom 20a of the cleaning tank 20. The through-hole 20b is a circular plate-like member in which a plurality of long holes penetrating in the thickness direction are formed, and is covered by a pump guard 26 that prevents foreign matter from entering. The through-hole 20b is connected to the cleaning pump 5 via a connection part 50. The connection part 50 is formed with a first connection hole 50a connected to the through-hole 20b, a drain hole 50b connected to a drain pipe 28 that discharges water to the outside of the cleaning machine main body part 1, and a second connection hole 50c connected to the cleaning pump 5. Note that the connection part 50 may be integrally formed with the cleaning pump 5 as a part of the casing constituting the cleaning pump 5, or may be provided separately from the cleaning pump 5 as a member connecting the cleaning tank 20 and the cleaning pump 5.

[0027] An overflow pipe 27 extending in the vertical direction is provided in the cleaning tank 20. The overflow pipe 27 allows water exceeding a predetermined water level in the cleaning tank 20 to flow in from its upper end and drain to the outside of the cleaning tank 20, and defines the water level of the cleaning water stored in the cleaning tank 20. The lower end of the overflow pipe 27 is detachably inserted into a drain hole 50b formed in the connection part 50 through a burring-processed pump guard 26 that covers the through-hole 20b. When the lower end of the overflow pipe 27 is removed from the drain hole 50b, the cleaning water stored in the cleaning tank 20 can be discharged through the through-hole 20b and the drain hole 50b.

[0028] The upper nozzle 3 is provided above the cleaning chamber 1B. The upper nozzle 3 is rotatably provided on an upper support portion 21A provided above the cleaning chamber 1B. The upper nozzle 3 has a main body portion 30 that extends from a base end portion, which is the center of rotation of the rotation axis of the upper nozzle 3, along the radial direction to a tip end portion. The main body portion 30 is integrally formed with a cleaning injection hole 31 for injecting the cleaning water stored in the cleaning tank 20, a cleaning flow path 32 that extends from the center of rotation to the cleaning injection hole 31 and through which the cleaning water flows, a rinsing injection hole 33 for injecting the rinsing water stored in the rinsing tank 6, and a rinsing flow path 34 that extends from the center of rotation to the rinsing injection hole 33 and through which the rinsing water flows. The upper nozzle 3 rotates when the flow of the cleaning water generated in the cleaning flow path 32 or the flow of the rinsing water generated in the rinsing flow path 34 is converted into a rotational force. An upper cleaning pipe 58 for supplying the cleaning water to the cleaning flow path 32 and an upper rinsing pipe 78 for supplying the rinsing water to the rinsing flow path 34 are connected to the upper nozzle 3.

[0029] The lower nozzle 4 is provided below the cleaning chamber 1B. The lower nozzle 4 is rotatably provided on a lower support portion 21B provided below the cleaning chamber 1B. The lower nozzle 4 has a main body portion 40 that extends from a base end portion, which is the center of rotation of the rotation axis of the lower nozzle 4, along the radial direction to a tip end portion. The main body portion 40 is integrally formed with a cleaning injection hole 41 for injecting the cleaning water stored in the cleaning tank 20, a cleaning flow path 42 that extends from the center of rotation to the cleaning injection hole 41 and through which the cleaning water flows, a rinsing injection hole 43 for injecting the rinsing water stored in the rinsing tank 6, and a rinsing flow path 44 that extends from the center of rotation to the rinsing injection hole 43 and through which the rinsing water flows. The lower nozzle 4 rotates when the flow of the cleaning water generated in the cleaning flow path 42 or the flow of the rinsing water generated in the rinsing flow path 44 is converted into a rotational force. A lower cleaning pipe 59 for supplying the cleaning water to the cleaning flow path 42 and a lower rinsing pipe 79 for supplying the rinsing water to the rinsing flow path 44 are connected to the lower nozzle 4.

[0030] The tableware D arranged on the tableware rack is sprayed with washing water by the upper nozzle 3 and the lower nozzle 4 in the washing process, and rinsing water is sprayed by the upper nozzle 3 and the lower nozzle 4 in the rinsing process.

[0031] The washing pump 5 is arranged in the machine room 1A. The washing pump 5 sends out the washing water stored in the washing tank 20 to the washing chamber 1B that houses the tableware D and the like. The washing pump 5 takes in the washing water in the washing tank 20 through the connection part 50 and sends out the washing water to the upper nozzle 3 and the lower nozzle 4. An upper washing pipe 58 is connected to the first discharge port of the washing pump 5. The upper washing pipe 58 is connected to the upper nozzle 3. A lower washing pipe 59 is connected to the second discharge port of the washing pump 5. The lower washing pipe 59 is connected to the lower nozzle 4.

[0032] The rinsing tank 6 is arranged in the machine room 1A. The rinsing tank 6 stores the rinsing water used for rinsing the tableware D and the like. The rinsing water is the water sprayed into the washing chamber 1B in the initial hot water supply process and the rinsing process. Water is supplied to the rinsing tank 6 from an external water source through the water supply pipe 60. A strainer 60A is provided in the water supply pipe 60. A valve 60B is provided on the downstream side of the strainer 60A in the water supply pipe 60.

[0033] The rinsing tank 6 is provided with a rinsing water detection unit 62, an overflow unit 63, a rinsing water heater 64A, and a rinsing water temperature sensor 64B.

[0034] The rinsing water detection unit 62 is a switch that detects that the water stored in the rinsing tank 6 is at the fixed water level H2. The detection result of the rinsing water detection unit 62 is acquired by the controller 10. The valve 60B is controlled by the controller 10. For example, the controller 10 opens and closes the valve in conjunction with the detection of the fixed water level H2 by the rinsing water detection unit 62, and controls the valve 60B so as to keep the water level of the rinsing water stored in the rinsing tank 6 constant.

[0035] The overflow section 63 discharges the water that has exceeded the full water level in the rinsing tank 6. The rinsing tank 6 is a sealed tank and, for example, exceeds the full water level when the valve 60B malfunctions and closes. The rinsing water heater 64A heats the rinsing water stored in the rinsing tank 6 in order to improve the sterilization ability and the rinsing ability. The rinsing water temperature sensor 64B detects the temperature of the rinsing water. The detection result by the rinsing water temperature sensor 64B is acquired by the controller 10. The ON / OFF of the rinsing water heater 64A is controlled by the controller 10. For example, the rinsing water heater 64A is controlled by the controller 10 so as to maintain the rinsing water at a predetermined temperature based on the water temperature detected by the rinsing water temperature sensor 64B.

[0036] The rinsing pump 7 sends out the rinsing water stored in the rinsing tank 6 to the cleaning chamber 1B that houses the tableware D and the like. The rinsing pump 7 takes in the rinsing water in the rinsing tank 6 and sends out the rinsing water to the upper nozzle 3 and the lower nozzle 4. The upper rinsing pipe 78 and the lower rinsing pipe 79 are connected to the discharge port of the rinsing pump 7 via the rinsing pipe 77. The upper rinsing pipe 78 is connected to the upper nozzle 3. The lower rinsing pipe 79 is connected to the lower nozzle 4.

[0037] The detergent supply pump 8 is arranged in the machine room 1A. The detergent supply pump 8 supplies the detergent stored in the detergent tank 8A to the cleaning chamber 1B via the pipe 8B. The detergent discharged into the cleaning chamber 1B flows into the cleaning tank 20 and mixes with the cleaning water. The rinse agent supply pump 9 is arranged in the machine room 1A. The rinse agent supply pump 9 supplies the rinse agent stored in the rinse agent tank 9A to the rinsing pipe 77 via the pipe 9B. The rinse agent supplied to the rinsing pipe 77 mixes with the rinsing water and is supplied to the cleaning chamber 1B via the upper nozzle 3 and the lower nozzle 4.

[0038] The controller 10 is disposed between the upper panel 11B in the main body 1 of the dishwasher and the upper panel 2B constituting the washing chamber 1B. The controller 10 controls all operations in the dishwasher 100. The controller 10 is a computer system or a processor implemented on an integrated circuit. The controller 10 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input / output interface, etc. Various programs or data are stored in the ROM. The controller 10 controls a washing operation that takes as one cycle the execution of a washing process of jetting washing water into the washing chamber 1B to wash the tableware D and the execution of a rinsing process of jetting rinsing water into the washing chamber 1B to rinse the tableware D.

[0039] Next, the upper nozzle 3 will be described in detail mainly with reference to FIGS. 1, 3, 5, and 6. As shown in FIGS. 1, 3, 5, and 6, the upper nozzle 3 extends from the base end portion BP, which is the center of rotation of the rotation axis R3 in the upper nozzle 3, along the radial direction to the tip end portion TP, and the tip end portion TP side is curved rearward in the rotation direction R of the upper nozzle 3, and includes a main body portion 30. The main body portion 30 includes a plurality of washing injection holes 31 for injecting the washing water stored in the washing tank 20, a washing flow path 32 that extends from the center of rotation of the rotation axis R3 to the washing injection holes 31 and through which the washing water flows, a plurality of rinsing injection holes 33 for injecting the rinsing water stored in the rinsing tank 6, and a rinsing flow path 34 that extends from the center of rotation of the rotation axis R3 to the rinsing injection holes 33 and through which the rinsing water flows, and are integrally formed.

[0040] Figs. 5 and 6 are views of a first part (upper part) 3A and a second part (lower part) 3B, which are obtained by dividing the main body 30 of the upper nozzle 3 into two along a rotating surface, as seen from the inner surface side (flow path side). The first part 3A and the second part 3B constituting the main body 30 are integrally formed of a resin material such as polypropylene. The main body 30 of the upper nozzle 3 is formed by fixing such two first parts 3A and second parts 3B by welding or the like. In the states of the first part 3A and the second part 3B shown in Figs. 5 and 6, the cleaning flow path 32 and the rinsing flow path 34, which will be described in detail below, are not formed, and there are only grooves that will become the cleaning flow path 32 and the rinsing flow path 34 when the first part 3A and the second part 3B are fixed to each other. Here, for convenience of explanation, these grooves are also referred to as the cleaning flow path 32 and the rinsing flow path 34, and the upper nozzle 3 will be described.

[0041] The cleaning flow path 32 has a first inflow portion 32a that passes through the rotation center of the rotation axis R3 and extends in a first direction D1 along the radial direction, and a first curved portion 32b that extends from the first inflow portion 32a so as to be convex forward in the rotation direction R. Cleaning water flows into the first inflow portion 32a from the upper cleaning pipe 58 via the first inflow shaft 30a. Cleaning water flows into the first curved portion 32b from the first inflow portion 32a. A series of cleaning flow paths 32 following the first inflow portion 32a to the first curved portion 32b extends so as to be convex forward in the rotation direction R from the base end portion BP to the tip end portion TP without curving so as to be convex rearward in the rotation direction R.

[0042] The rinsing flow path 34 has a second inflow portion 34a that passes through the center of rotation of the rotation axis R3 and extends in a second direction D2 that intersects the first direction D1 along the radial direction, and a second curved portion 34b that extends from the second inflow portion 34a so as to be convex forward in the rotation direction R and along the first curved portion 32b. In the present embodiment, the intersection angle between the first direction D1 and the second direction D2 is 60°, but it is not limited to this angle. Rinsing water flows into the second inflow portion 34a from the upper rinsing pipe 78 via the second inflow shaft 30b. Rinsing water flows into the second curved portion 34b from the second inflow portion 34a. The series of rinsing flow paths 34 continuing from the second inflow portion 34a to the second curved portion 34b extend so as to be convex forward in the rotation direction R from the base end portion BP to the tip end portion TP without curving so as to be convex rearward in the rotation direction R.

[0043] The upper nozzle 3 includes a detaching mechanism 37 for detaching the main body portion 30 from the upper support portion 21A provided in the cleaning chamber 1B. When the direction that intersects both the first direction D1 and the second direction D2 along the radial direction through the center of rotation of the upper nozzle 3 is defined as the third direction D3, the detaching mechanism 37 has a pair of knob portions 37a, 37a arranged to face each other in the third direction D3. In the present embodiment, the intersection angle between the first direction D1 and the second direction D2, the intersection angle between the second direction D2 and the third direction D3, and the intersection angle between the third direction D3 and the first direction D1 in the rotation direction R are each 60°. In other words, the first direction D1, the second direction D2, and the third direction D3 are shifted by 60° each in the rotation direction R. Note that each intersection angle is not limited to 60°.

[0044] The outer shape of both end portions of the main body portion 30 in the third direction D3 passing through the center of rotation of the main body portion 30 is formed in a concave shape toward the center of rotation. The pair of knob portions 37a, 37a project along the third direction D3 from the outer shape of the concave main body portion 30. The detaching mechanism 37 can detach the main body portion 30 from the upper support portion 21A by pressing both of the pair of knob portions 37a, 37a closer to each other along the third direction D3.

[0045] More specifically, as shown in FIGS. 7(A) and 7(B), the attachment / detachment mechanism 37 includes a pair of knob portions 37a, 37a, a first rail portion 37b connected to one of the knob portions 37a, a first fitting portion 37d slidably provided within the first rail portion 37b and provided to one of the knob portions 37a via a first compression spring 37f, a second rail portion 37c connected to the other knob portion 37a, a second fitting portion 37e slidably provided within the second rail portion 37c and provided to the other knob portion 37a via a second compression spring 37g, a first pressing portion 37h connected to one of the knob portions 37a, and a second pressing portion 37i connected to the other knob portion 37a.

[0046] In the attachment / detachment mechanism 37 configured as described above, when the pair of knob portions 37a, 37a are pressed along the third direction D3, as shown in FIG. 7(B), the second fitting portion 37e is pressed via the first pressing portion 37h and the first fitting portion 37d is pressed via the second pressing portion 37i. Thus, the first fitting portion 37d and the second fitting portion 37e move away from each other. As a result, the fitting between the attachment / detachment mechanism 37 and the upper support portion 21A is released, and the upper nozzle 3 (main body portion 30) can be removed from the upper support portion 21A.

[0047] On the other hand, when the pressing of the pair of knob portions 37a, 37a is released, as shown in FIG. 7(A), the first compression spring 37f and the second compression spring 37g compressed when the pair of knob portions 37a, 37a were pressed cause the first fitting portion 37d and the second fitting portion 37e to be pressed and move, and the first fitting portion 37d and the second fitting portion 37e come into contact with each other. At this time, a ring-shaped fitting portion formed by the opposing portions of the first fitting portion 37d and the second fitting portion 37e fits into a groove portion formed on the outer peripheral surface of the cylindrical upper support portion 21A (see FIG. 1). As a result, the fitting of the attachment / detachment mechanism 37 to the upper support portion 21A is restored, and the upper nozzle 3 (main body portion 30) can be fixed to the upper support portion 21A.

[0048] As shown in FIGS. 3, 5, and 6, when the main body 30 is viewed in plan view (when viewed from the direction of the rotation axis R3), the rinsing channel 34 and the cleaning channel 32 are arranged in the order of the rinsing channel 34 and the cleaning channel 32 around the rotation direction R with respect to the third direction D3. And the degree of bending of the first bending portion 32b is larger than that of the second bending portion 34b. In the present embodiment, as approaching the tip TP in the main body 30, the first bending portion 32b approaches the second bending portion 34b. Here, the degree of bending refers to the radius of curvature or the radius of curvature of the curved portion (arc-shaped portion). The smaller the radius of curvature, the larger the degree of bending, and the larger the radius of curvature, the larger the degree of bending.

[0049] In order to wash away the dirt on the tableware D, it is necessary to inject a large flow rate of cleaning water from the cleaning injection holes 31. As shown in FIG. 6, in the cleaning channel 32 of the upper nozzle 3, in order to enable the circulation of a large flow rate of cleaning water, it has a width in a direction orthogonal to the extending direction (along the circumferential direction). The cleaning injection holes 31 are provided on the front side in the rotation direction R (for example, on the front side of the center position in the width direction) in the cleaning channel 32 having such a width, and are arranged in a plurality along the extending direction of the cleaning channel 32. Further, the plurality of cleaning injection holes 31 provided in the cleaning channel 32 constituting the first bending portion 32b are arranged along the front edge in the rotation direction R of the main body 30.

[0050] A hemispherical first protrusion (protrusion) 35 protruding upward in the vertical direction (that is, from the outside to the inside of the main body 30) is formed in the cleaning channel 32. The first protrusion 35 is recessed upward when the main body 30 is viewed from below. The cleaning injection holes 31 are provided at or near the apex of the hemisphere in such a first protrusion 35. The first protrusion 35 directs the injection direction of the cleaning water from the main body 30. More specifically, the cleaning water is injected radially from such cleaning injection holes 31, and a part of the water injected from such cleaning injection holes 31 changes its direction along the inner surface of the hemisphere in the first protrusion 35, so that the water can be injected in the direction in which the tableware D is arranged. From this, the first protrusion 35 can also be regarded as a part of the cleaning injection holes 31.

[0051] In this embodiment, by forming the cleaning injection hole 31 by cutting out a part of such a first protruding portion 35 in one direction, the cleaning injection hole 31 is brought closer to the front side in the rotation direction R of the first protruding portion 35. More specifically, in the first protruding portion 35, by arranging one end portion (if the cut-out portion has a length (extends in one direction)) of the above-mentioned cut-out portion along the flow path wall surface on the front side in the rotation direction of the cleaning flow path 32, the cleaning injection hole 31 is brought closer to the front side in the rotation direction R of the cleaning flow path 32, that is, closer to the flow path wall surface of the cleaning flow path 32. Note that the degree of bringing the cleaning injection hole 31 closer to the front side in the rotation direction is appropriately adjusted so that the cleaning water guided to the front side in the rotation direction in the cleaning flow path 32 can be discharged from the cleaning injection hole 31 due to the rotation of the upper nozzle 3 during the rinsing process.

[0052] In this embodiment, the size (cut-out length) of the cut-out of the first protruding portion 35 forming the cleaning injection hole 31 is made longer as it is closer to the tip portion TP in the extending direction of the main body portion 30, and is brought closer to the flow path wall surface on the front side in the rotation direction of the cleaning flow path 32. The cleaning water remaining in the cleaning flow path 32 is guided to the tip portion TP by the rotation of the upper nozzle 3 during the rinsing process. In this embodiment, since the cut-out size of the cleaning injection hole 31 arranged closer to the tip portion TP is made longer and brought closer to the flow path wall surface on the front side in the rotation direction of the cleaning flow path 32, the cleaning water in the cleaning flow path 32 guided to the tip portion TP during the rinsing process can be effectively discharged.

[0053] Similarly, in the rinsing flow path 34, a hemispherical second protruding portion 36 protruding upward in the vertical direction (that is, from the outside to the inside of the main body portion 30) is formed. The second protruding portion 36 is provided for directing the injection direction of the rinsing water from the main body portion 30. The rinsing injection hole 33 is formed by cutting out a part of such a second protruding portion 36 in one direction.

[0054] Next, the lower nozzle 4 will be described in detail with reference to FIGS. 1 and 4 to 6. As shown in FIGS. 1 and 4 to 6, the lower nozzle 4 extends from the base end portion BP, which is the center of rotation of the rotation axis R4 in the lower nozzle 4, along the radial direction to the tip end portion TP, and the tip end portion TP side is curved backward in the rotation direction R of the lower nozzle 4. The main body portion 40 includes a plurality of cleaning injection holes 41 for injecting the cleaning water stored in the cleaning tank 20, a cleaning flow path 42 that extends from the center of rotation of the rotation axis R4 to the cleaning injection holes 41 and through which the cleaning water flows, a plurality of rinsing injection holes 43 for injecting the rinsing water stored in the rinsing tank 6, and a rinsing flow path 44 that extends from the center of rotation of the rotation axis R4 to the rinsing injection holes 43 and through which the rinsing water flows, and are integrally formed.

[0055] FIGS. 5 and 6 are views of the first part (lower part) 4A and the second part (upper part) 4B obtained by dividing the main body portion 40 of the lower nozzle 4 into two along the rotation plane, respectively, as seen from the inner surface side (flow path side). The first part 4A and the second part 4B constituting the main body portion 40 are integrally formed of a resin material such as polypropylene. The main body portion 40 of the lower nozzle 4 is formed by fixing such two first parts 4A and second parts 4B by welding or the like. In the state of the first part 4A and the second part 4B shown in FIGS. 5 and 6, the cleaning flow path 42 and the rinsing flow path 44 described in detail below are not formed, and there are only grooves that become the cleaning flow path 42 and the rinsing flow path 44 when the first part 4A and the second part 4B are fixed to each other. For this reason, for convenience of explanation, these grooves are also referred to as the cleaning flow path 42 and the rinsing flow path 44, and the lower nozzle 4 will be described.

[0056] The cleaning flow path 42 has a first inflow portion 42a that passes through the center of rotation of the rotation axis R4 and extends in the first direction D1 along the radial direction, and a first curved portion 42b that extends from the first inflow portion 42a so as to be convex forward in the rotation direction R. Cleaning water flows into the first inflow portion 42a from the lower cleaning pipe 59 via the first inflow shaft 40a. Cleaning water flows into the first curved portion 42b from the first inflow portion 42a. A series of cleaning flow paths 42 following the first inflow portion 42a to the first curved portion 42b extends from the base end portion BP to the tip end portion TP so as to be convex forward in the rotation direction R without curving so as to be convex rearward in the rotation direction R.

[0057] The rinsing flow path 44 has a second inflow portion 44a that passes through the center of rotation of the rotation axis R4 and extends in the second direction D2 that intersects the first direction D1 along the radial direction, and a second curved portion 44b that extends from the second inflow portion 44a so as to be convex forward in the rotation direction R and along the first curved portion 42b. In the present embodiment, the intersection angle between the first direction D1 and the second direction D2 is 60°, but it is not limited to this angle. Rinsing water flows into the second inflow portion 44a from the lower rinsing pipe 79 via the second inflow shaft 40b. Rinsing water flows into the second curved portion 44b from the second inflow portion 44a. A series of rinsing flow paths 44 following the second inflow portion 44a to the second curved portion 44b extends from the base end portion BP to the tip end portion TP so as to be convex forward in the rotation direction R without curving so as to be convex rearward in the rotation direction R.

[0058] The lower nozzle 4 is provided with a detaching mechanism 47 for detaching the main body 40 from the lower support portion 21B provided in the cleaning chamber 1B. When the third direction D3 is defined as the direction that intersects both the first direction D1 and the second direction D2 along the radial direction passing through the rotation center of the lower nozzle 4, the detaching mechanism 47 has a pair of knob portions 47a, 47a arranged to face the third direction D3. In the present embodiment, the intersection angle between the first direction D1 and the second direction D2, the intersection angle between the second direction D2 and the third direction D3, and the intersection angle between the third direction D3 and the first direction D1 in the rotation direction R are each 60°. In other words, the first direction D1, the second direction D2, and the third direction D3 are shifted by 60° each in the rotation direction R. Note that each intersection angle is not limited to 60°.

[0059] The outer shape of both end portions of the main body 40 in the third direction D3 passing through the rotation center of the main body 40 is formed in a concave shape toward the rotation center. Note that the configuration and operation of the detaching mechanism 47 including the pair of knob portions 47a, 47a, the first rail portion 47b connected to one knob portion 47a, the first fitting portion 47d slidably provided in the first rail portion 47b and provided to one knob portion 47a via the first compression spring 47f, the second rail portion 47c connected to the other knob portion 47a, the second fitting portion 47e slidably provided in the second rail portion 47c and provided to the other knob portion 47a via the second compression spring 47g, the first pressing portion 47h connected to one knob portion 47a, and the second pressing portion 47i connected to the other knob portion 47a are the same as the configuration and operation of the detaching mechanism 37 described above, and thus detailed description here is omitted.

[0060] As shown in FIGS. 4 to 6, when the main body 40 is viewed in plan (when viewed from the direction of the rotation axis R4), the rinsing flow path 44 and the cleaning flow path 42 are arranged in the order of the rinsing flow path 44 and the cleaning flow path 42 around the rotation direction R with the third direction D3 as a reference. And the degree of bending of the first bending portion 42b is larger than the degree of bending of the second bending portion 44b. In the present embodiment, the first bending portion 42b approaches the second bending portion 44b as approaching the tip portion TP in the main body 40.

[0061] In the washing channel 42, a hemispherical first protruding portion 45 that protrudes downward in the vertical direction (i.e., from the outside to the inside of the main body portion 40) is formed. When viewed from above the main body portion 40, the first protruding portion 45 is recessed downward. The first protruding portion 45 is provided to direct the injection direction of the washing water from the main body portion 40. The washing injection hole 41 is provided in such a first protruding portion 45. Similarly, in the rinsing channel 44, a hemispherical second protruding portion 46 that protrudes upward in the vertical direction (i.e., from the outside to the inside of the main body portion 40) is formed. The second protruding portion 46 is provided to direct the injection direction of the rinsing water from the main body portion 40. The rinsing injection hole 43 is formed by notching a part of such a second protruding portion 46 in one direction.

[0062] Next, the operation and effects of the dishwasher 100 of the above embodiment will be described. In the washing channel 32(42) of the dishwasher 100 of the above embodiment, the water flowing into the first inflow portion 32a(42a) acts on the first curved portion 32b(42b) that is convex forward in the rotation direction R. Specifically, when the washing water is pumped from the washing tank 20 to the upper nozzle 3 (lower nozzle 4) by the washing pump 5, the washing water flows into the first inflow portion 32a(42a) via the first inflow shaft 30a(40a). Then, the water flowing from the first inflow portion 32a(42a) toward the first curved portion 32b(42b) collides with the flow path wall surface on the forward side in the rotation direction of the first curved portion 32b(42b), and the direction of the flow changes and flows toward the tip portion TP. In this upper nozzle 3 (lower nozzle 4), the collision of the washing water against such a first curved portion 32b(42b) is converted into the rotational force of the main body portion 30. Thereby, the flow of water generated in the washing channel 32(42) can be efficiently converted into the rotational force of the upper nozzle 3 (lower nozzle 4).

[0063] Also, in the cleaning channel 32(42) with this configuration, the water flowing into the second inflow portion 34a(44a) acts on the second curved portion 34b(44b) that protrudes forward in the rotational direction R. Specifically, when the rinsing water is pumped from the rinsing tank 6 to the upper nozzle 3 (lower nozzle 4) by the cleaning pump 5, the rinsing water flows into the second inflow portion 34a(44a) through the second inflow shaft 30b(40b). Then, the rinsing water flowing from the second inflow portion 34a(44a) toward the second curved portion 34b(44b) collides with the channel wall surface on the front side in the rotational direction of the second curved portion 34b(44b), changing the direction of the flow, and flows toward the tip portion TP. In this upper nozzle 3 (lower nozzle 4), the collision of the rinsing water against such a second curved portion 34b(44b) is converted into the rotational force of the main body portion 40. As a result, the water flow generated in the rinsing channels 34(44) can be efficiently converted into the rotational force of the upper nozzle 3 (lower nozzle 4).

[0064] Due to the results as described above, it is possible to efficiently convert the water flow generated in the cleaning channels 32(42) and the rinsing channels 34(44) formed in the upper nozzle 3 (lower nozzle 4) into rotational force without wasting water as much as possible.

[0065] In the dishwasher 100 of the above-described embodiment, the washing channel 32(42) and the rinsing channel 34(44) extend from the base end portion BP to the tip end portion TP without curving so as to protrude rearward in the rotation direction R. Here, if there is a curved portion in the washing channel 32(42) that protrudes rearward in the rotation direction R, the washing water flowing from the first inflow portion 32a(42a) toward the first curved portion 32b(42b) collides with the channel wall surface on the rear side in the rotation direction of the first curved portion 32b(42b), and the direction of the flow changes and it flows toward the tip end portion TP. At this time, the collision of the water is converted into a rotational force in the direction opposite to the rotation direction that is originally desired to be rotated, so the rotational force in the direction that is originally desired to be rotated is attenuated. Similarly, if there is a curved portion in the rinsing channel 34(44) that protrudes rearward in the rotation direction R, the rinsing water flowing from the second inflow portion 34a(44a) toward the second curved portion 34b(44b) collides with the channel wall surface on the rear side in the rotation direction of the second curved portion 34b(44b), and the direction of the flow changes and it flows toward the tip end portion TP. At this time, the collision of the water is converted into a rotational force in the direction opposite to the rotation direction that is originally desired to be rotated, so the rotational force in the direction that is originally desired to be rotated is attenuated. In the present embodiment, since there is no curved portion in the washing channel 32(42) and the rinsing channel 34(44) that protrudes rearward in the rotation direction R, it is possible to prevent the attenuation of the rotational force in the direction that is originally desired to be rotated as described above.

[0066] In the dishwasher 100 of the above-described embodiment, since the pair of knob portions 37a, 37a(47a, 47a) are provided so as to face each other in the third direction D3 that intersects both the first direction D1 and the second direction D2, the size of the knob portion 37a(47a) can be formed large.

[0067] In the dishwasher 100 of the above-described embodiment, the second direction D2, the first direction D1, and the third direction D3 are shifted by approximately 60° each in the rotation direction R. As a result, while securing the washing channel 32(42) and the rinsing channel 34(44), a space for installing the knob portion 37a(47a) can be obtained. Therefore, while shortening the distance between the knob portions in the third direction (opposing direction), the size in the width direction of the knob portion 37a(47a) can be increased. Thereby, the knob portion 37a(47a) that is easy for the operator to grip can be provided.

[0068] In the dishwasher 100 of the above-described embodiment, when the main body 30 (40) is viewed in plan, the washing channel 32 (42) and the rinsing channel 34 (44) are arranged in the order of the rinsing channel 34 (44) and the washing channel 32 (42) around the rotation direction R with respect to the third direction D3. The degree of bending of the first bending portion 32b (42b) is larger than the degree of bending of the second bending portion 34b (44b). As a result, in particular, the bending in the washing channel 32 (42), that is, the bending from the first inflow portion 32a (42a) to the first bending portion 32b (42b) can be increased, so that the action of the water flowing into the first inflow portion 32a (42a) on the first bending portion 32b (42b) becomes larger. Thereby, the flow of water generated in the washing channel 32 (42) formed in the upper nozzle 3 (lower nozzle 4) can be converted into rotational force more efficiently.

[0069] In the dishwasher 100 of the above-described embodiment, the outer shape of both end portions of the third direction D3 passing through the rotation center in the main body 30 (40) is formed in a concave shape toward the rotation center. That is, the knob portion 37a (47a) protrudes from the concave outer shape in the third direction D3. Thereby, the distance between the pair of knob portions 37a (47a) can be shortened, so that the attachment and detachment operation with one hand becomes possible.

[0070] In the dishwasher 100 of the above-described embodiment, the washing injection holes 31 of the upper nozzle 3 are provided on the front side in the rotation direction R of the washing channel 32 and are arranged in a plurality along the extending direction of the washing channel 32. Thereby, due to the rotation of the upper nozzle 3 during the rinsing process, the washing water remaining in the washing channel 32 moves toward the washing injection holes 31, and the washing water remaining in the washing channel 32 is discharged from the washing injection holes 31. Thereby, the washing water remaining in the washing channel 32 after the rinsing process can be reduced, and the dripping of the water remaining in the washing channel 32 from the washing injection holes 31 after the rinsing process can be reduced.

[0071] Although one embodiment has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the invention.

[0072] In the dishwasher 100 of the above embodiment, the first direction D1, which is the extending direction of the first inflow portion 32a (42a), the second direction D2, which is the extending direction of the second inflow portion 34a (44a), and the third direction D3, which is the extending direction of the knob portion 37a (47a), have been described by taking an example in which they are shifted by 60° each in the rotational direction R. However, as described above, the present invention is not limited to this. For example, when the fourth direction D4 is a direction that is orthogonal to the third direction D3 and passes through the rotation center of the upper nozzle 3 (lower nozzle 4) and extends along the radial direction, one of the first direction D1 and the second direction D2 is a direction between the third direction D3 and the fourth direction D4 in the rotational direction R, and the other of the first direction D1 and the second direction D2 is a direction between the fourth direction D4 and the third direction D3 in the rotational direction R, and the upper nozzle 3 and the lower nozzle 4 may be formed. In the configuration according to such a modification example, since the extending direction of the first inflow portion 32a (42a) and the extending direction of the second inflow portion 34a (44a) can be made appropriately different, these two first inflow portions 32a (42a) and the second inflow portion 34a (44a) can be easily formed without interference.

[0073] <Other Modification Examples> In the above embodiment, an example has been described in which the rinsing channel 34 (44) and the washing channel 32 (42) are arranged in the order of the rinsing channel 34 (44) and the washing channel 32 (42) around the rotational direction R with respect to the third direction D3. However, they may be arranged in the order of the washing channel 32 (42) and the rinsing channel 34 (44) around the rotational direction R with respect to the third direction D3.

[0074] In the above embodiment and modification example, an example has been described in which the washing channel 32 of the upper nozzle 3 has a width, and the washing injection holes 31 are provided on the front side in the rotational direction R in the washing channel 32 having such a width. However, for example, they may be provided at the center in the width direction in the washing channel 32 having such a width.

[0075] The above-described embodiments and modifications are applicable not only to the dishwasher 100 of the type in which the door portion 15 is provided on the front side of the dishwasher main body 1, but also to, for example, a dishwasher of the type in which the door portion opens and closes vertically.

[0076] In the above-described embodiments and modifications, the dishwasher 100 having a configuration in which rinsing water is supplied from the rinsing tank 6 built in the machine room 1A of the dishwasher main body 1 to the upper nozzle 3 and the lower nozzle 4 has been described as an example, but the present invention is not limited thereto. For example, it may be applied to a dishwasher having a configuration in which the rinsing water is supplied from a gas booster or an electric booster that is provided outside the dishwasher main body 1 of the dishwasher 100 and in which the water stored in the rinsing tank is heated by a heating source such as gas or electricity to the upper nozzle 3 and the lower nozzle 4.

[0077] The present invention may appropriately combine the above-described embodiments and other modifications.

Explanation of Reference Numerals

[0078] 1... Dishwasher main body, 1A... Machine room, 1B... Washing chamber, 3... Upper nozzle, 4... Lower nozzle, 5... Washing pump, 6... Rinsing tank, 7... Rinsing pump, 15... Door portion, 20... Washing tank, 30, 40... Main body portion, 31, 41... Washing injection holes, 32, 42... Washing flow paths, 32a, 42a... First inflow portions, 32b, 42b... First curved portions, 33, 43... Rinsing injection holes, 34, 44... Rinsing flow paths, 34a, 44a... Second inflow portions, 34b, 44b... Second curved portions, 35, 45... First protruding portions (protruding portions), 36, 46... Second protruding portions, 37, 47... Detaching and attaching mechanisms, 37a, 47a... Knobs, 100... Dishwasher (washing machine), BP... Base end portion, TP... Tip end portion, D... Tableware, R... Rotation direction.

Claims

1. A cleaning machine provided in a cleaning chamber for accommodating an object to be cleaned, the cleaning machine comprising a nozzle that rotates in one direction and sprays water into the cleaning chamber, wherein the nozzle, comprises a main body portion that extends from a base end portion, which is the center of rotation of the rotation axis of the nozzle, along the radial direction to a tip end portion, and the tip end portion side is curved backward in the rotation direction of the nozzle, wherein the main body portion, comprises a cleaning injection hole for injecting cleaning water, a cleaning flow path that extends from the center of rotation to the cleaning injection hole and through which the cleaning water flows, a rinsing injection hole for injecting rinsing water, and a rinsing flow path that extends from the center of rotation to the rinsing injection hole and through which the rinsing water flows, and the cleaning flow path and the rinsing flow path are integrally formed, wherein the cleaning flow path has a first inflow portion that passes through the center of rotation and extends in a first direction along the radial direction, and a first curved portion that extends from the first inflow portion and curves convexly forward in the rotation direction, wherein the rinsing flow path has a second inflow portion that passes through the center of rotation and extends in a second direction that intersects the first direction along the radial direction, and a second curved portion that extends from the second inflow portion and curves convexly forward in the rotation direction and along the first curved portion, and the cleaning flow path and the rinsing flow path extend from the base end portion to the tip end portion without curving so as to be convex backward in the rotation direction. The cleaning machine.

2. The cleaning machine further comprises a detaching and attaching mechanism for detaching and attaching the main body portion from a support portion provided in the cleaning chamber, wherein when a direction that intersects both the first direction and the second direction along the radial direction through the center of rotation is defined as a third direction, the detaching and attaching mechanism has a pair of knob portions disposed to face each other in the third direction, and the main body portion is detachably provided from the support portion by pressing both of the pair of knob portions in a direction approaching each other along the third direction. The cleaning machine according to claim 1.

3. A cleaning machine provided in a cleaning chamber for accommodating an object to be cleaned, the cleaning machine comprising a nozzle that rotates in one direction and sprays water into the cleaning chamber, wherein the nozzle, comprises a main body portion that extends from a base end portion, which is the center of rotation of the rotation axis of the nozzle, along the radial direction to a tip end portion, and the tip end portion side is curved backward in the rotation direction of the nozzle, wherein the main body portion, comprises a cleaning injection hole for injecting cleaning water, a cleaning flow path that extends from the center of rotation to the cleaning injection hole and through which the cleaning water flows, a rinsing injection hole for injecting rinsing water, A washing flow path that extends from the rotation center to the rinsing injection holes and through which the rinsing water flows is integrally formed. The washing flow path includes a first inflow portion that passes through the rotation center and extends in a first direction along the radial direction, and a first curved portion that extends from the first inflow portion and curves convexly forward in the rotation direction. The rinsing flow path includes a second inflow portion that passes through the rotation center and extends in a second direction intersecting the first direction along the radial direction, and a second curved portion that extends from the second inflow portion and curves convexly forward in the rotation direction and along the first curved portion. The washing machine further includes a detaching mechanism for detaching the main body portion from a support portion provided in the washing chamber. When a direction intersecting both the first direction and the second direction along the radial direction through the rotation center is defined as a third direction. The detaching mechanism has a pair of knob portions arranged to face each other in the third direction, and the main body portion is detachably provided from the support portion by pressing both of the pair of knob portions in a direction approaching each other along the third direction. A washing machine.

4. When a direction perpendicular to the third direction and along the radial direction through the rotation center is defined as a fourth direction. One of the first direction and the second direction is a direction between the third direction and the fourth direction in the rotation direction. The washing machine according to claim 2 or 3, wherein the other of the first direction and the second direction is a direction between the fourth direction and the third direction in the rotation direction.

5. The washing machine according to any one of claims 2 to 4, wherein the first direction, the second direction, and the third direction are shifted by approximately 60° each in the rotation direction.

6. When the main body portion is viewed in plan, the rinsing flow path and the washing flow path are arranged in the order of the rinsing flow path and the washing flow path around the rotation direction with respect to the third direction. The washing machine according to any one of claims 2 to 5, wherein the degree of curvature of the first curved portion is greater than the degree of curvature of the second curved portion.

7. The outer shape of both end portions of the third direction passing through the rotation center in the main body portion is formed concave toward the rotation center. The washing machine according to any one of claims 2 to 6, wherein the knob portion projects in the third direction from the concave outer shape.

8. The cleaning injection holes of the nozzle disposed above the cleaning chamber are provided on the front side in the rotational direction of the cleaning flow path and are arranged in a plurality along the extending direction of the cleaning flow path. The cleaning machine according to any one of claims 1 to 7.

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