JP7698558B2 - Cleaning machine - Google Patents

Description

The present invention relates to a cleaning machine.

Patent Document 1 discloses a washer that includes a washing tank that washes an object to be washed and stores washing water heated to a predetermined temperature, a washing injection hole (washing nozzle) that sprays washing water into a washing chamber, a washing pump that sprays the washing water stored in the washing tank from the washing injection hole into the washing chamber, a rinsing tank that rinses the object to be washed and stores rinsing water heated to a predetermined temperature, a rinsing injection hole (rinsing nozzle) that sprays rinsing water into the washing chamber, a rinsing pump that sprays the rinsing water stored in the rinsing tank from the rinsing injection hole into the washing chamber, and a rinsing pipe that connects the rinsing injection hole and the rinsing pump.

JP 2005-34374 A

In a cleaning machine, during the cleaning process in which cleaning water is sprayed from the cleaning injection hole, there is a risk that cleaning water may flow into the rinsing pipe through the rinsing injection hole or through gaps in the nozzle's rotating shaft. The cleaning water that flows into the rinsing pipe may flow back through the rinsing pipe and into the rinsing tank. Since the cleaning water is dirtier than the rinsing water, when the cleaning water flows into the rinsing tank, the rinsing water becomes dirty. In this case, dirty rinsing water is sprayed during the rinsing process, and dirt on the objects being washed cannot be effectively removed. Therefore, backflow can be prevented by providing a backflow prevention valve in the rinsing pipe. However, providing a backflow prevention valve increases costs.

The object of the present invention is to provide a washer that can prevent washing water from flowing into the rinsing tank while suppressing increases in costs.

The cleaning machine according to the present invention is a cleaning machine for cleaning objects stored in a cleaning chamber, and is provided with a cleaning tank for storing cleaning water for cleaning the objects, a cleaning jet hole for spraying cleaning water into the cleaning chamber, a cleaning pump for spraying the cleaning water stored in the cleaning tank from the cleaning jet hole into the cleaning chamber, a rinsing jet hole for spraying rinsing water for rinsing the objects to be cleaned into the cleaning chamber, a rinsing pump for spraying the rinsing water from the rinsing jet hole into the cleaning chamber, and a rinsing pipe connecting the rinsing jet hole and the rinsing pump, and the rinsing jet hole is for spraying the rinsing water from the upper side of the cleaning chamber into the cleaning chamber. and a second rinsing jet hole that injects rinsing water into the cleaning chamber from the lower side of the cleaning chamber. The rinsing pipe has a first rinsing pipe connected to a rinsing pump at one end and supplying rinsing water from the other end, and a second rinsing pipe that supplies rinsing water from one end to the first rinsing jet hole and from the other end to the second rinsing jet hole. The second rinsing pipe has an extension portion that extends in the vertical direction, and the other end of the first rinsing pipe is connected to the side of the second rinsing pipe at the extension portion of the second rinsing pipe.

In the washer according to the present invention, the other end of the first rinsing pipe is connected to the side of the second rinsing pipe at the extension of the second rinsing pipe. In this configuration, when cleaning water flows in from one end of the second rinsing pipe, the cleaning water flows to the other end in the extension. Also, when cleaning water flows in from the other end of the second rinsing pipe, the cleaning water can be prevented from reaching the connection between the first rinsing pipe and the second rinsing pipe. Therefore, even if cleaning water flows into the second rinsing pipe, the rinsing water can be prevented from flowing from the second rinsing pipe into the first rinsing pipe. In this way, the cleaning water can be prevented from flowing into the rinsing tank without providing a backflow prevention valve. Therefore, the cleaning water can be prevented from flowing into the rinsing tank while preventing an increase in costs.

In the washer according to the present invention, the first rinsing pipe has an extension portion that extends in the vertical direction, the other end of the first rinsing pipe is located on the upper end side of the extension portion of the first rinsing pipe, and the connection portion between the first rinsing pipe and the second rinsing pipe may be located below the position of the highest water level of the rinsing water flowing through the extension portion of the first rinsing pipe. With this configuration, it is possible to further prevent the washing water from flowing from the second rinsing pipe into the first rinsing pipe. Therefore, it is possible to more reliably prevent the washing water from flowing into the rinsing tank.

In the washer according to the present invention, the connection between the first rinsing pipe and the second rinsing pipe may be located above the second rinsing jet hole. With this configuration, even if cleaning water flows in from the other end of the second rinsing pipe, the cleaning water can be prevented from reaching the connection between the first rinsing pipe and the second rinsing pipe. Therefore, the flow of rinsing water from the second rinsing pipe into the first rinsing pipe can be more reliably prevented.

This invention makes it possible to prevent washing water from flowing into the rinsing tank while minimizing increases in costs.

FIG. 1 is a perspective view of a dishwasher according to one embodiment. FIG. 2 is a diagram showing a schematic configuration of the dishwasher. FIG. 3 is a side view of the dishwasher. FIG. 4 is a front view of the dishwasher. FIG. 5 is a diagram showing a first rinsing pipe and a second rinsing pipe. FIG. 6 is a diagram showing a connection portion of the first rinsing pipe and the second rinsing pipe.

The following describes a dishwasher (washing machine) 100 according to one embodiment with reference to the drawings. In the description of the drawings, the same elements are given the same reference numerals, and duplicate descriptions are omitted. For ease of description, the front-rear direction (first direction), left-right direction (second direction), and up-down direction are respectively defined in FIG. 1.

As shown in FIG. 1, the dishwasher 100 according to one embodiment is an under-counter type dishwasher with a door section 15 provided on the front of the washing chamber 1B. As shown in FIGS. 1 and 2, the dishwasher 100 includes a main body section 1, a door section 15, a washing tank 20, an upper nozzle 3, a lower nozzle 4, a washing pump 5, a rinsing tank 6, a rinsing pump 7, a detergent supply pump 8, a rinse agent supply pump 9, and a controller 10.

The main body 1 is formed including a frame (not shown), a stainless steel exterior panel 11, and an interior panel 2. The exterior panel 11 has a pair of side panels 11A, 11A forming the left and right sides, 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 part of the main body 1. The upper front panel 11C is provided with an operating unit 13 for operating various operations of the dishwasher 100.

The operation unit 13 is a section where the operation of inputting the operation mode and various settings is performed. In this embodiment, the operation unit 13 is composed of an LCD screen and reinforced glass (electrostatic switch) that covers it. The operator can perform various operations by touching the reinforced glass that covers the LCD screen. The operation unit 13 may be composed of various buttons and a touch panel, or may be composed of a remote control, operation terminal, etc. that is separate from the main body unit 1.

In the lower region of the main body 1, a machine room 1A is formed to accommodate a washing tank 20, a washing pump 5, a rinsing tank 6, a rinsing pump 7, a detergent supply pump 8, and a rinse agent supply pump 9. The machine room 1A forms a space extending in the front-rear and left-right directions when viewed vertically. In the upper region of the main body 1, a washing chamber 1B is formed to accommodate a rack on which tableware (items to be washed) D and the like are set. The washing chamber 1B is a space above the washing tank 20 and is constituted by 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). A rack rail 23 that supports the rack is formed on the inner surface of the pair of side panels 2A, 2A. The main body 1 is formed with an opening 1C through which a rack on which tableware D and the like are set is inserted and removed from the washing chamber 1B. The rack rail 23 may be formed integrally 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.

The door section 15 is disposed outside the opening 1C. The door section 15 is provided so as to be capable of opening and closing the opening 1C, and when the door section 15 is opened, the cleaning chamber 1B is opened to the outside of the main body section 1. The door section 15 is provided so as to be rotatable about an axis extending in the left-right direction at the lower end of the door section 15 as the axis of rotation. The operator can open the cleaning chamber 1B by pushing the handle 15A provided at the upper end of the door section 15 forward.

The washing tank 20 is provided below the washing chamber 1B. The washing tank 20 stores washing water used to wash tableware D and the like stored in the washing chamber 1B. The washing water is water sprayed into the washing chamber 1B during the washing process. The washing tank 20 is composed of a water receiving section 21 and a storage section 22. The water receiving section 21 separates the machine chamber 1A from the washing chamber 1B, and is a section that receives and guides to the storage section 22 the water that is sprayed from the upper nozzle 3 and the lower nozzle 4 and falls after washing or rinsing the tableware D. The water receiving section 21 is composed of a bottom section 21A (see FIG. 4) and a side section 21B (see FIG. 4). The storage section 22 is a section that stores the washing water supplied to the upper nozzle 3 and the lower nozzle 4 by the washing pump 5. The storage section 22 is composed of a bottom section 22A and a side section 22B.

The storage section 22 of the cleaning tank 20 is provided with a cleaning water detection section 24, a cleaning water heater 25A, and a cleaning water temperature sensor 25B.

The cleaning water detection unit 24 detects the level of cleaning water stored in the cleaning tank 20. The cleaning water detection unit 24 is, for example, a switch that is ON when the water level in the cleaning tank 20 exceeds the constant water level H1 and is OFF when the water level is equal to or lower than the constant water level H1. The detection result by the cleaning water detection unit 24 is acquired by the controller 10. If the cleaning pump 5, which will be described in detail later, sucks in air while it is running, so-called air entrapment occurs and cleaning water cannot be sprayed from the upper nozzle 3 and the lower nozzle 4. In one embodiment, the cleaning pump 5 is stopped from sucking in air when the cleaning water detection unit 24 turns OFF during operation, thereby preventing the cleaning pump 5 from sucking in air.

The cleaning water heater 25A heats the cleaning water stored in the cleaning tank 20 to a predetermined temperature to improve sterilization and cleaning capabilities. 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.

A circular through hole 20b is formed in the bottom 22A of the storage section 22 of the cleaning tank 20. The through hole 20b is a circular plate-shaped member with multiple long holes formed through it in the thickness direction, and is covered by a pump guard 26 that prevents the intrusion of foreign matter. 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 main body 1, and a second connection hole 50c connected to the cleaning pump 5. The connection part 50 may be integrally formed with the cleaning pump 5 as a part of the casing that constitutes the cleaning pump 5, or may be provided separately from the cleaning pump 5 as a member that connects the cleaning tank 20 and the cleaning pump 5.

The cleaning tank 20 is provided with an overflow pipe 27 that extends vertically. The overflow pipe 27 allows water that exceeds a predetermined water level in the cleaning tank 20 to flow in from its upper end and drain it to the outside of the cleaning tank 20, thereby determining the water level of the cleaning water stored in the cleaning tank 20. The lower end of the overflow pipe 27 passes through a burred pump guard 26 that covers the through hole 20b and is detachably inserted into a drain hole 50b formed in the connection part 50. By removing the lower end of the overflow pipe 27 from the drain hole 50b, the cleaning water stored in the cleaning tank 20 can be discharged via the through hole 20b and the drain hole 50b.

The upper nozzle 3 is provided above the cleaning chamber 1B. The upper nozzle 3 is rotatably provided on the upper support part 16 provided above the cleaning chamber 1B. The upper nozzle 3 has a main body part 30 extending from the base end, which is the rotation center of the rotation axis of the upper nozzle 3, to the tip end along the radial direction. The main body part 30 is integrally formed with a cleaning injection hole 31 for injecting cleaning water stored in the cleaning tank 20, a cleaning flow path 32 extending from the rotation center to the cleaning injection hole 31 and through which the cleaning water flows, a rinsing injection hole (first rinsing injection hole) 33 for injecting rinsing water stored in the rinsing tank 6, and a rinsing flow path 34 extending from the rotation center to the rinsing injection hole 33 and through which the rinsing water flows. The upper nozzle 3 rotates by converting the flow of cleaning water generated in the cleaning flow path 32 or the flow of rinsing water generated in the rinsing flow path 34 into a rotational force. The upper nozzle 3 is connected to an upper cleaning pipe 58 that supplies cleaning water to the cleaning flow path 32 and an upper rinsing pipe 78A that supplies rinsing water to the rinsing flow path 34.

The lower nozzle 4 is provided below the cleaning chamber 1B. The lower nozzle 4 is rotatably provided on the lower support part 17 provided below the cleaning chamber 1B. The lower nozzle 4 has a main body part 40 extending from the base end, which is the rotation center of the rotation axis of the lower nozzle 4, to the tip end along the radial direction. The main body part 40 is integrally formed with a cleaning injection hole 41 for injecting cleaning water stored in the cleaning tank 20, a cleaning flow path 42 extending from the rotation center to the cleaning injection hole 41 and through which the cleaning water flows, a rinsing injection hole (second rinsing injection hole) 43 for injecting rinsing water stored in the rinsing tank 6, and a rinsing flow path 44 extending from the rotation center to the rinsing injection hole 43 and through which the rinsing water flows. The lower nozzle 4 rotates by converting the flow of cleaning water generated in the cleaning flow path 42 or the flow of rinsing water generated in the rinsing flow path 44 into a rotational force. The lower nozzle 4 is connected to a lower cleaning pipe 59 that supplies cleaning water to the cleaning flow path 42 and a lower rinsing pipe 78B that supplies rinsing water to the rinsing flow path 44.

During the washing process, washing water is sprayed onto the dishes D arranged on the dish rack by the upper nozzle 3 and the lower nozzle 4, and during the rinsing process, rinsing water is sprayed onto the dishes D by the upper nozzle 3 and the lower nozzle 4.

The washing pump 5 is arranged in the machine room 1A. In the machine room 1A, the washing pump 5 is arranged on the right side of the storage section 22 of the washing tank 20 and on the rear side in the front-rear direction. The washing pump 5 is arranged between the storage section 22 and the rinsing tank 6 in the left-right direction. The washing pump 5 sends out the washing water stored in the washing tank 20 to the washing chamber 1B that contains tableware D and the like. The washing pump 5 takes in the washing water from the washing tank 20 and sends out the washing water to the upper nozzle 3 and the lower nozzle 4. The first supply section 51A of the washing pump 5 is connected to the upper washing pipe 58. The upper washing pipe 58 is connected to the upper nozzle 3. The second supply section 51B of the washing pump 5 is connected to the lower washing pipe 59. The lower washing pipe 59 is connected to the lower nozzle 4.

The rinsing tank 6 is disposed in the machine room 1A. In the machine room 1A, the rinsing tank 6 is disposed to the right of the storage section 22 (rinsing pump 5) of the washing tank 20 and at the rear in the front-to-rear direction. The rinsing tank 6 is disposed in line with the rinsing pump 7 in the front-to-rear direction. The rinsing tank 6 stores rinsing water used for rinsing tableware D and the like. The rinsing water is 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 via a water supply pipe 60. A strainer 60A is provided in the water supply pipe 60. A valve 60B is provided downstream of the strainer 60A in the water supply pipe 60.

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

The rinsing water detection unit 62 is a switch that detects that the water stored in the rinsing tank 6 is at a constant 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 controls the valve 60B to open and close in conjunction with the detection of the constant water level H2 by the rinsing water detection unit 62, and to maintain a constant water level of the rinsing water stored in the rinsing tank 6.

The overflow section 63 discharges water that exceeds the full water level in the rinsing tank 6. The rinsing tank 6 is a sealed tank, and exceeds the full water level, for example, when the valve 60B has a closing abnormality. The rinsing water heater 64A heats the rinsing water stored in the rinsing tank 6 to a predetermined temperature to improve the sterilization and rinsing capabilities. 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 to maintain the rinsing water at a predetermined temperature based on the water temperature detected by the rinsing water temperature sensor 64B.

The rinsing pump 7 is disposed in the machine room 1A. The rinsing pump 7 is disposed in the machine room 1A on the right side of the storage section 22 of the washing tank 20 and on the front side in the front-rear direction. The rinsing pump 7 is disposed in a line in the front-rear direction with respect to the rinsing tank 6. The rinsing pump 7 sends out the rinsing water stored in the rinsing tank 6 to the washing room 1B that contains the tableware D and the like. The rinsing pump 7 takes in the rinsing water from the rinsing tank 6 and sends it out to the upper nozzle 3 and the lower nozzle 4. The upper rinsing pipe (second rinsing pipe) 78A and the lower rinsing pipe (second rinsing pipe) 78B are connected to the discharge port of the rinsing pump 7 via the first rinsing pipe 77. The upper rinsing pipe 78A is connected to the upper nozzle 3. The lower rinsing pipe 78B is connected to the lower nozzle 4.

The detergent supply pump 8 is disposed 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 disposed in the machine room 1A. The rinse agent supply pump 9 supplies the rinse agent stored in the rinse agent tank 9A to the first rinsing pipe 77 via the pipe 9B. The rinse agent supplied to the first 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.

The controller 10 is disposed between the upper panel 11B of the main body 1 and the upper panel 2B that constitutes the washing chamber 1B. The controller 10 controls the overall operation of the dishwasher 100. The controller 10 is a computer system or processor implemented in an integrated circuit. The controller 10 is composed of a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), an input/output interface, etc. Various programs and data are stored in the ROM.

Next, the upper cleaning pipe 58 will be described. In this embodiment, the upper cleaning pipe 58 is made of resin. The upper cleaning pipe 58 is disposed below the bottom 22A of the storage section 22 of the cleaning tank 20, and is disposed along the cleaning tank 20 and the side panel 2A. Specifically, as described above, the cleaning pump 5 is disposed on the right side of the storage section 22 of the cleaning tank 20, and the upper cleaning pipe 58 extending from the cleaning pump 5 extends in the left-right direction below the storage section 22, rises on the left side of the machine room 1A, and extends in the up-down direction along the side 21B of the water receiving section 21, the side 22B of the storage section 22, and the side panel 2A. As shown in FIG. 3, the upper cleaning pipe 58 has a flattened shape in the portion (extending in the up-down direction) disposed along the side 21B of the water receiving section 21, the side 22B of the storage section 22, and the side panel 2A. The upper cleaning pipe 58 is fixed to the side 21B of the water receiving section 21 by a fixing bracket 58A. The fixing bracket 58A is made of metal. The fixing bracket 58A may be fixed to the side 22B of the storage section 22 and/or the side panel 2A.

Next, the first rinsing pipe 77, the upper rinsing pipe 78A, and the lower rinsing pipe 78B will be described in detail. In this embodiment, the first rinsing pipe 77, the upper rinsing pipe 78A, and the lower rinsing pipe 78B are made of resin. The upper rinsing pipe 78A and the lower rinsing pipe 78B are formed by a single second rinsing pipe 78. One end of the second rinsing pipe 78 constitutes the upper rinsing pipe 78A. The other end of the second rinsing pipe 78 constitutes the lower rinsing pipe 78B. That is, the second rinsing pipe 78 supplies rinsing water to the rinsing jet hole 33 from one end and supplies rinsing water to the rinsing jet hole 43 from the other end.

The first rinsing pipe 77 has one end connected to the rinsing pump 7 and the other end supplying rinsing water to the second rinsing pipe 78. As shown in Figures 3 and 4, the first rinsing pipe 77 has a first portion 77a connected to the rinsing pump 7, a second portion 77b connected to the first portion 77a and extending in the vertical direction, and a third portion 77c connected to the upper end of the second portion 77b, connected to the second rinsing pipe 78, and supplying rinsing water to the second rinsing pipe 78.

As shown in FIG. 4, the first portion 77a constitutes one end portion connected to the rinsing pump 7. The first portion 77a is connected to an outlet of the rinsing pump 7 facing left. The first portion 77a is located on the right side of the storage portion 22 of the cleaning tank 20 and disposed in front. The first portion 77a extends in the left-right direction. The second portion 77b is located on the right side of the storage portion 22 in the machine chamber 1A and disposed in front.

The third portion 77c constitutes the other end connected to the second rinsing pipe 78. The third portion 77c is disposed in front of the front side portion 22B of the storage portion 22, and is bent toward the rear side on the left side of the storage portion 22. As shown in FIG. 3, the third portion 77c extends in the front-rear direction along the left side portion 22B of the storage portion 22, rises near the center of the machine room 1A in the front-rear direction, and extends in the up-down direction so as to follow the side portion 21B of the water receiving portion 21 and the side panel 2A.

As shown in FIG. 4, the third section 77c is provided with an inlet 77d for rinsing agent supplied from the rinsing agent supply pump 9 in a portion located in the machine room 1A and on the front side in the front-to-rear direction (in front of the front side portion 22B of the storage section 22). A pipe 9B is connected to the inlet 77d. As shown in FIG. 6, the third section 77c is located above the constant water level H2 of the rinsing tank 6.

3 and 5, the first rinsing pipe 77 and the second rinsing pipe 78 have extending portions that extend in the same direction at a predetermined interval from each other. The extending portions of the first rinsing pipe 77 and the second rinsing pipe 78 are integrated by a connecting portion 70 that connects the first rinsing pipe 77 and the second rinsing pipe 78 and extends along the extending portions. In this embodiment, the connecting portion 70 connects the portion extending in the vertical direction in the third portion 77c of the first rinsing pipe 77 and the portion extending in the vertical direction in the second rinsing pipe 78. The connecting portion 70 is a plate-shaped member. The connecting portion 70 is provided with a fixing portion 72 that fixes the connecting portion 70 to a fixed object. In this embodiment, the fixing portion 72 fixes the connecting portion 70 to the side portion 21B of the water receiving portion 21. As shown in FIG. 5, the fixing portion 72 is provided with an insertion hole 72a through which the bolt B is inserted. As shown in FIG. 3, the fixing portion 72 is fixed to the side portion 21B by a bolt B. The fixing portion 72 may also be fixed to the side panel 2A.

The third portion 77c of the first rinsing pipe 77 is connected to the side of the second rinsing pipe 78 at the above-mentioned extended portion of the second rinsing pipe 78. With this configuration, the cleaning water supplied from the third portion 77c of the first rinsing pipe 77 branches and flows into the upper rinsing pipe 78A and the lower rinsing pipe 78B. In the third portion 77c of the first rinsing pipe 77, the end (upper end) connected to the second rinsing pipe 78 has a curved shape that is convex upward. The third portion 77c of the first rinsing pipe 77 is connected so that it faces upward when viewed from the second rinsing pipe 78.

As shown in FIG. 6, the connection portion 77e between the third portion 77c of the first rinsing pipe 77 and the second rinsing pipe 78 is located below the maximum water level H3 of the rinsing water flowing through the third portion 77c of the first rinsing pipe 77. In addition, the connection portion 77e between the third portion 77c of the first rinsing pipe 77 and the second rinsing pipe 78 is located above the rinsing injection hole 43 of the lower nozzle 4. The second rinsing pipe 78 is divided into an upper rinsing pipe 78A and a lower rinsing pipe 78B by the connection portion 77e with the first rinsing pipe 77.

As shown in FIG. 3, the lower rinsing pipe 78B extends vertically across the side panel 2A, the left side 21B of the water receiving section 21, and the left side 22B of the storage section 22, then bends at its lower end and extends longitudinally along the left side 22B of the cleaning tank 20. As shown in FIG. 4, the lower rinsing pipe 78B extends to the front of the storage section 22 and bends toward the left at the front of the storage section 22. The lower rinsing pipe 78B extends horizontally along the front side 22B of the storage section 22 and bends toward the rear at the right side of the storage section 22.

3 and 4, at least a part of the first rinsing pipe 77 and the second rinsing pipe 78 is arranged along at least one of the wall surfaces constituting the cleaning chamber 1B and the wall surfaces constituting the cleaning tank 20. In this embodiment, the third part 77c of the first rinsing pipe 77 is arranged along the outer surface of the side panel 2A and the outer surface of the cleaning tank 20 (side portion 21B of the water receiving portion 21, side portion 22B of the storage portion 22). The second rinsing pipe 78 is arranged along the outer surface of the side panel 2A, the outer surface of the upper panel 2B, and the outer surface of the cleaning tank 20 (side portion 21B of the water receiving portion 21, side portion 22B of the storage portion 22). Here, in this embodiment, being arranged along the outer surface means that it is not in contact with the outer surface and is arranged at a distance from the outer surface. It can also be said that at least a part of the first rinsing pipe 77 and the second rinsing pipe 78 is arranged around at least one of the wall surfaces constituting the cleaning chamber 1B and the wall surfaces constituting the cleaning tank 20. The first rinsing pipe 77 and the second rinsing pipe 78 may be in contact with the outer surface.

Next, the effect of the dishwasher 100 of this embodiment will be described. In the dishwasher 100 of the above embodiment, the third portion 77c of the first rinsing pipe 77 is connected to the side of the second rinsing pipe 78 at the extension portion of the second rinsing pipe 78. In this configuration, when washing water flows in from the upper rinsing pipe 78A side of the second rinsing pipe 78, the washing water flows to the lower rinsing pipe 78B side at the extension portion. In addition, when washing water flows in from the lower rinsing pipe 78B side of the second rinsing pipe 78, it is possible to prevent the washing water from reaching the connection portion 77e between the first rinsing pipe 77 and the second rinsing pipe 78. Therefore, even if washing water flows into the second rinsing pipe 78, it is possible to prevent the washing water from flowing from the second rinsing pipe 78 to the first rinsing pipe 77. In this way, it is possible to prevent the washing water from flowing into the rinsing tank 6 without providing a backflow prevention valve. This prevents washing water from flowing into the rinsing tank 6 while minimizing costs.

In the dishwasher 100 according to this embodiment, the first rinsing pipe 77 has an extension portion that extends in the vertical direction. The other end of the third portion 77c of the first rinsing pipe 77 is located on the upper end side of the extension portion of the first rinsing pipe 77. The connection portion 77e between the first rinsing pipe 77 and the second rinsing pipe 78 is located below the position of the highest water level H3 of the rinsing water flowing through the extension portion of the first rinsing pipe 77. With this configuration, it is possible to further prevent the washing water from flowing from the second rinsing pipe 78 into the first rinsing pipe 77. Therefore, it is possible to more reliably prevent the washing water from flowing into the rinsing tank 6.

In the dishwasher 100 according to this embodiment, the connection portion 77e between the first rinsing pipe 77 and the second rinsing pipe 78 is located above the rinsing injection hole 43 of the lower nozzle 4. With this configuration, even if washing water flows in from the lower rinsing pipe 78B side of the second rinsing pipe 78, the washing water can be prevented from reaching the connection portion 77e between the first rinsing pipe 77 and the second rinsing pipe 78. Therefore, the rinsing water can be more reliably prevented from flowing from the second rinsing pipe 78 into the first rinsing pipe 77.

Although the embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention.

In the above embodiment, the upper rinsing pipe 78A and the lower rinsing pipe 78B of the second rinsing pipe 78 extend vertically in a straight line at the connection position with the third portion 77c of the first rinsing pipe 77. However, each of the upper rinsing pipe 78A and the lower rinsing pipe 78B may be inclined with respect to the vertical direction. For example, starting from the connection portion 77e, the upper rinsing pipe 78A may be inclined to the right with respect to the vertical direction, and the lower rinsing pipe 78B may be inclined to the left with respect to the vertical direction. In this configuration, the connection portion 77e of the third portion 77c of the first rinsing pipe 77 faces downward, so that water can be further prevented from flowing from the second rinsing pipe 78 into the first rinsing pipe 77.

In the above embodiment, the first rinsing pipe 77 and the second rinsing pipe 78 are connected by the connecting portion 70, and the first rinsing pipe 77 and the second rinsing pipe 78 are fixed to the side portion 21B of the water receiving portion 21 by the fixing portion 72 of the connecting portion 70. However, the fixing method of the first rinsing pipe 77 and the second rinsing pipe 78 is not limited to this. The first rinsing pipe 77 and the second rinsing pipe 78 may be fixed by, for example, a fixing bracket.

<Other Modifications>
In the above embodiment and modified examples, an example has been described in which the rack rail 23 is formed integrally with the side panel 2A by extrusion processing, but the rack rail 23 may also be formed by attaching other components to the inner surface of the side panel 2A.

The above embodiment and modified examples can be applied not only to a dishwasher 100 having a door 15 on the front side of the main body 1, but also to dishwashers having a door that opens and closes vertically, for example.

In the above embodiment and modified example, the dishwasher 100 is described as being configured such that rinsing water is supplied to the upper nozzle 3 and the lower nozzle 4 from the rinsing tank 6 built into the machine chamber 1A of the main body 1, but is not limited thereto. For example, the present invention may be applied to a dishwasher configured such that rinsing water is supplied to the upper nozzle 3 and the lower nozzle 4 from a gas booster or electric booster that is provided outside the main body 1 of the dishwasher 100 and that heats the water stored in the rinsing tank with a heating source such as gas or electricity.

The present invention may be implemented by combining the above embodiments and other modifications as appropriate.

1B...washing chamber, 5...washing pump, 7...rinsing pump, 20...washing tank, 31, 41...washing jet hole, 33...rinsing jet hole (first rinsing jet hole), 43...rinsing jet hole (second rinsing jet hole), 77...first rinsing pipe, 77e...connection part, 78...second rinsing pipe, 78A...upper rinsing pipe (second rinsing pipe), 78B...lower rinsing pipe (second rinsing pipe), 100...dishwasher (washing machine), D...dish (items to be washed), H3...maximum water level.

Claims (2)

A cleaning machine for cleaning objects contained in a cleaning chamber, comprising:
A cleaning tank for storing cleaning water for cleaning the object to be cleaned;
a cleaning injection hole for injecting the cleaning water into the cleaning chamber;
a cleaning pump that sprays the cleaning water stored in the cleaning tank from the cleaning spray hole into the cleaning chamber;
a rinsing injection hole for injecting rinsing water for rinsing the object to be cleaned into the cleaning chamber;
a rinsing pump for injecting the rinsing water from the rinsing injection hole into the cleaning chamber;
A rinsing pipe connecting the rinsing jet and the rinsing pump,
The rinsing jet holes include a first rinsing jet hole for injecting the rinsing water into the cleaning chamber from an upper side thereof, and a second rinsing jet hole for injecting the rinsing water into the cleaning chamber from a lower side thereof,
The rinsing pipe includes a first rinsing pipe having one end connected to the rinsing pump and supplying the rinsing water from the other end, and a second rinsing pipe having one end that supplies the rinsing water to the first rinsing jet hole and the other end that supplies the rinsing water to the second rinsing jet hole,
The second rinsing pipe has an extension portion extending in a vertical direction,
The other end of the first rinsing pipe is connected to a side of the second rinsing pipe at the extension portion of the second rinsing pipe ,
The first rinsing pipe has an extension portion extending in the vertical direction,
The other end of the first rinsing pipe is located on an upper end side of the extension portion of the first rinsing pipe,
A cleaning machine , wherein a connection portion between the first rinsing pipe and the second rinsing pipe is located below a maximum water level of the rinsing water flowing through the extended portion of the first rinsing pipe . 2. The cleaning machine according to claim 1 , wherein a connection portion between the first rinsing pipe and the second rinsing pipe is located above the second rinsing jet hole.

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