Washing machine

Abstract

To provide a washer that can restrain washing water from flowing into a rinsing tank while restraining an increase in cost.SOLUTION: A tableware washer 100 comprises: a first rinsing pipe 77 of which one end part is connected to a rinsing pump 7, and for supplying rinsing water from the other end part; and a second rinsing pipe 78 for supplying the rinsing water to a rinsing injection hole 33 from one end part, and supplying the rinsing water to a rinsing injection hole 43 from the other end part. The second rinsing pipe 78 comprises an extending portion extending in a vertical direction. The other end part of the first rinsing pipe 77 is connected to a side part of the second rinsing pipe 78 in the extending portion of the second rinsing pipe 78.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a washing machine.

Background Art

[0002] Patent Document 1 discloses a washing machine including a washing tank that stores washing water for washing an object to be washed and heating the washing water to a predetermined temperature, a washing injection hole (washing nozzle) that injects the washing water into a washing chamber, a washing pump that injects the washing water stored in the washing tank into the washing chamber from the washing injection hole, a rinsing tank that stores rinsing water for rinsing the object to be washed and heating the rinsing water to a predetermined temperature, a rinsing injection hole (rinsing nozzle) that injects the rinsing water into the washing chamber, a rinsing pump that injects the rinsing water stored in the rinsing tank into the washing chamber from the rinsing injection hole, and a rinsing pipe that connects the rinsing injection hole and the rinsing pump.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a washing machine, in the washing step of injecting washing water from a washing injection hole, there is a risk that the washing water may flow into a rinsing pipe from a gap in the rotation axis of a rinsing injection hole or a nozzle. The washing water that has flowed into the rinsing pipe may flow backward through the rinsing pipe and into the rinsing tank. Since the washing water is dirtier than the rinsing water, if the washing water flows into the rinsing tank, the rinsing water will become dirty. In this case, since the dirty rinsing water is sprayed in the rinsing step, the dirt on the object to be washed cannot be effectively removed. Therefore, by providing a check valve in the rinsing pipe, backflow can be prevented. However, providing a check valve increases the cost.

[0005] Therefore, an object of the present invention is to provide a washing machine that can suppress an increase in cost while suppressing the inflow of washing water into the rinsing tank.

Means for Solving the Problems

[0006] The washing machine according to the present invention is a washing machine that washes an object to be washed accommodated in a washing chamber, and includes a washing tank that stores washing water for washing the object to be washed, a washing injection hole that injects washing water into the washing chamber, a washing pump that injects the washing water stored in the washing tank into the washing chamber from the washing injection hole, a rinsing injection hole that injects rinsing water for rinsing the object to be washed in the washing chamber, a rinsing pump that injects the rinsing water from the rinsing injection hole into the washing chamber, and a rinsing pipe that connects the rinsing injection hole and the rinsing pump. The rinsing injection hole has a first rinsing injection hole that injects rinsing water into the washing chamber from above the washing chamber and a second rinsing injection hole that injects rinsing water into the washing chamber from below the washing chamber. The rinsing pipe has a first rinsing pipe whose one end is connected to the rinsing pump and supplies rinsing water from the other end, and a second rinsing pipe that supplies rinsing water from one end to the first rinsing injection hole and supplies rinsing water from the other end to the second rinsing injection hole. The second rinsing pipe has an extending portion that extends in the vertical direction, and the other end of the first rinsing pipe is connected to the side portion of the second rinsing pipe at the extending portion of the second rinsing pipe.

[0007] In the washing machine according to the present invention, the other end of the first rinsing pipe is connected to the side portion of the second rinsing pipe at the extending portion of the second rinsing pipe. In this configuration, when washing water flows in from one end side of the second rinsing pipe, the washing water flows to the other end side at the extending portion. Also, when washing water flows in from the other end side of the second rinsing pipe, it is possible to suppress the washing water from reaching the connection portion between the first rinsing pipe and the second rinsing pipe. Therefore, even when washing water flows into the second rinsing pipe, it is possible to suppress the rinsing water from flowing from the second rinsing pipe into the first rinsing pipe. Thus, it is possible to suppress the inflow of washing water into the rinsing tank without providing a backflow prevention valve. Therefore, it is possible to suppress an increase in cost while suppressing the inflow of washing water into the rinsing tank.

[0008] In the dishwasher according to the present invention, the first rinsing pipe has an extending portion extending in the vertical direction, the other end of the first rinsing pipe is located on the upper end side of the extending 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 extending portion of the first rinsing pipe. With this configuration, it is possible to further suppress the inflow of the washing water from the second rinsing pipe into the first rinsing pipe. Therefore, it is possible to more reliably suppress the inflow of the washing water into the rinsing tank.

[0009] In the dishwasher according to the present invention, the connection portion between the first rinsing pipe and the second rinsing pipe may be located above the second rinsing injection holes. With this configuration, even when the washing water flows in from the other end side of the second rinsing pipe, it is possible to suppress the washing water from reaching the connection portion between the first rinsing pipe and the second rinsing pipe. Therefore, it is possible to more reliably suppress the inflow of the rinsing water from the second rinsing pipe into the first rinsing pipe.

Advantages of the Invention

[0010] According to the present invention, it is possible to suppress the inflow of the washing water into the rinsing tank while suppressing an increase in cost.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0012] 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 given to the same elements, and redundant descriptions are omitted. For convenience of explanation, in FIG. 1, the front-rear direction (first direction), the left-right direction (second direction), and the up-down direction are set respectively.

[0013] As shown in FIG. 1, a 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 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.

[0014] The main body portion 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 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 main body portion 1. An operation portion 13 for operating various operations of the dishwasher 100 is provided on the upper front panel 11C.

[0015] The operation portion 13 is a part for performing input operations of operation modes and various settings. The operation portion 13 of the present embodiment is composed of a liquid crystal screen and a strengthened glass (electrostatic switch) covering the same. An operator can perform various operations by touching the strengthened glass covering the liquid crystal screen. Note that the operation portion 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 main body portion 1.

[0016] In the lower region of the main body 1, a machine room 1A is formed that houses 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 that extends in the front-rear direction and the left-right direction when viewed from the vertical direction. In the upper region of the main body 1, a washing chamber 1B is formed that houses a rack on which tableware (objects 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). Rack rails 23 for supporting the rack are formed on the inner surfaces of the pair of side panels 2A, 2A. An opening 1C is formed in the main body 1 for taking in and out a rack on which tableware D and the like are set into and out of the washing chamber 1B. 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.

[0017] 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 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.

[0018] 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 composed of a water receiving part 21 and a storage part 22. The water receiving part 21 partitions the machine room 1A and the cleaning chamber 1B, and is a part that guides the water sprayed from the upper nozzle 3 and the lower nozzle 4 and falling after cleaning or rinsing the tableware D to the storage part 22. The water receiving part 21 is composed of a bottom part 21A (see Fig. 4) and a side part 21B (see Fig. 4). The storage part 22 is a part that stores the cleaning water supplied to the upper nozzle 3 and the lower nozzle 4 by the cleaning pump 5. The storage part 22 is composed of a bottom part 22A and a side part 22B.

[0019] In the storage part 22 of the cleaning tank 20, a cleaning water detection part 24, a cleaning water heater 25A, and a cleaning water temperature sensor 25B are provided.

[0020] The cleaning water detection part 24 detects the water level of the cleaning water stored in the cleaning tank 20. The cleaning water detection part 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 part 24 is acquired by the controller 10. The cleaning pump 5, which will be described in detail later, will cause a so-called air bite and be unable to spray the cleaning water from the upper nozzle 3 and the lower nozzle 4 when it sucks in air during operation. In one embodiment, the operation of the cleaning pump 5 is stopped when the cleaning water detection part 24 turns OFF during operation, thereby preventing the cleaning pump 5 from sucking in air.

[0021] The washing water heater 25A heats the washing water stored in the washing tank 20 to a predetermined temperature in order to improve the sterilization ability and the washing ability. The washing water temperature sensor 25B detects the temperature of the washing water stored in the washing tank 20. The detection result by the washing water temperature sensor 25B is acquired by the controller 10. The ON / OFF of the washing water heater 25A is controlled by the controller 10. For example, the washing water heater 25A is controlled by the controller 10 so as to maintain the washing water at a predetermined temperature based on the water temperature detected by the washing water temperature sensor 25B.

[0022] A circular through-hole 20b is formed at the bottom 22A of the storage part 22 of the washing 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 the intrusion of foreign matters. The through-hole 20b is connected to the washing pump 5 via the 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 part 1, and a second connection hole 50c connected to the washing pump 5. Note that the connection part 50 may be integrally formed with the washing pump 5 as a part of the casing constituting the washing pump 5, or may be provided separately from the washing pump 5 as a member that connects the washing tank 20 and the washing pump 5.

[0023] An overflow pipe 27 extending in the vertical direction is provided in the washing tank 20. The overflow pipe 27 allows water exceeding a predetermined water level in the washing tank 20 to flow in from its upper end and drain to the outside of the washing tank 20, and defines the water level of the washing water stored in the washing tank 20. The lower end of the overflow pipe 27 is detachably inserted into the drain hole 50b formed in the connection part 50 through the burring-processed pump guard 26 that covers the through-hole 20b. The overflow pipe 27 can discharge the washing water stored in the washing tank 20 through the through-hole 20b and the drain hole 50b when its lower end is removed from the drain hole 50b.

[0024] The upper nozzle 3 is provided above the cleaning chamber 1B. The upper nozzle 3 is rotatably provided on an upper support portion 16 provided above the cleaning chamber 1B. The upper nozzle 3 has a main body portion 30 extending from a base end portion, which is the center of rotation of the rotation axis of the upper nozzle 3, to a tip end portion along the radial direction. In the main body portion 30, there are provided a cleaning injection hole 31 for injecting the cleaning water stored in the cleaning tank 20, a cleaning flow path 32 extending from the center of rotation to the cleaning injection hole 31 through which the cleaning water flows, a rinsing injection hole (first rinsing injection hole) 33 for injecting the rinsing water stored in the rinsing tank 6, and a rinsing flow path 34 extending from the center of rotation to the rinsing injection hole 33 through which the rinsing water flows, which are integrally formed. 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 78A for supplying the rinsing water to the rinsing flow path 34 are connected to the upper nozzle 3.

[0025] The lower nozzle 4 is provided below the cleaning chamber 1B. The lower nozzle 4 is rotatably provided on a lower support portion 17 provided below the cleaning chamber 1B. The lower nozzle 4 has a main body portion 40 extending from a base end portion, which is the center of rotation of the rotation axis of the lower nozzle 4, to a tip end portion along the radial direction. In the main body portion 40, there are provided a cleaning injection hole 41 for injecting the cleaning water stored in the cleaning tank 20, a cleaning flow path 42 extending from the center of rotation to the cleaning injection hole 41 through which the cleaning water flows, a rinsing injection hole (second rinsing injection hole) 43 for injecting the rinsing water stored in the rinsing tank 6, and a rinsing flow path 44 extending from the center of rotation to the rinsing injection hole 43 through which the rinsing water flows, which are integrally formed. 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 78B for supplying the rinsing water to the rinsing flow path 44 are connected to the lower nozzle 4.

[0026] 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.

[0027] The washing pump 5 is arranged in the machine room 1A. The washing pump 5 is arranged in the machine room 1A on the right side of the storage part 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 part 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 houses the tableware D and the like. The washing pump 5 takes in the washing water of the washing tank 20 and sends out the washing water to the upper nozzle 3 and the lower nozzle 4. The upper washing pipe 58 is connected to the first supply part 51A of the washing pump 5. The upper washing pipe 58 is connected to the upper nozzle 3. The lower washing pipe 59 is connected to the second supply part 51B of the washing pump 5. The lower washing pipe 59 is connected to the lower nozzle 4.

[0028] The rinsing tank 6 is arranged in the machine room 1A. The rinsing tank 6 is arranged in the machine room 1A on the right side of the storage part 22 (washing pump 5) of the washing tank 20 and on the rear side in the front-rear direction. The rinsing tank 6 is arranged in a row in the front-rear direction with respect to the rinsing pump 7. 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 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.

[0029] The rinsing tank 6 is provided with a rinsing water detection part 62, an overflow part 63, a rinsing water heater 64A, and a rinsing water temperature sensor 64B.

[0030] 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 controls the valve 60B to open and close in conjunction with the detection of the fixed water level H2 by the rinsing water detection unit 62, so as to keep the water level of the rinsing water stored in the rinsing tank 6 constant.

[0031] The overflow unit 63 discharges the water that has exceeded the full water level in the rinsing tank 6. The rinsing tank 6 is a sealed tank. For example, when the valve 60B malfunctions and closes, the water level exceeds the full water level. The rinsing water heater 64A heats the rinsing water stored in the rinsing tank 6 to a predetermined temperature in order to improve the sterilization ability and 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 to maintain the rinsing water at a predetermined temperature based on the water temperature detected by the rinsing water temperature sensor 64B.

[0032] The rinsing pump 7 is arranged in the machine room 1A. The rinsing pump 7 is arranged in the machine room 1A on the right side of the storage part 22 of the cleaning tank 20 and on the front side in the front-rear direction. The rinsing pump 7 is arranged in a row with the rinsing tank 6 in the front-rear direction. The rinsing pump 7 sends out the rinsing water stored in the rinsing tank 6 to the cleaning chamber 1B that houses tableware D and the like. The rinsing pump 7 takes in the rinsing water from the rinsing tank 6 and sends out the rinsing water 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.

[0033] 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 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.

[0034] The controller 10 is arranged between the upper panel 11B in the main body 1 and the upper panel 2B constituting the cleaning chamber 1B. The controller 10 controls the overall operation of 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.

[0035] Next, the upper cleaning pipe 58 will be described. In the present embodiment, the upper cleaning pipe 58 is formed of resin. The upper cleaning pipe 58 is disposed below the bottom 22A of the storage portion 22 of the cleaning tank 20 and is arranged along the cleaning tank 20 and the side panel 2A. Specifically, as described above, the cleaning pump 5 is disposed on the right side with respect to the storage portion 22 of the cleaning tank 20. The upper cleaning pipe 58 extending from the cleaning pump 5 extends in the left-right direction below the storage portion 22, rises on the left side of the machine room 1A, and extends in the vertical direction along the side portion 21B of the water receiving portion 21, the side portion 22B of the storage portion 22, and the side panel 2A. As shown in FIG. 3, the upper cleaning pipe 58 has a flat shape in a portion (a portion extending in the vertical direction) arranged along the side portion 21B of the water receiving portion 21, the side portion 22B of the storage portion 22, and the side panel 2A. The upper cleaning pipe 58 is fixed to the side portion 21B of the water receiving portion 21 by a fixing bracket 58A. The fixing bracket 58A is formed of metal. Note that the fixing bracket 58A may be fixed to the side portion 22B of the storage portion 22 and / or the side panel 2A.

[0036] Next, the first rinsing pipe 77, the upper rinsing pipe 78A, and the lower rinsing pipe 78B will be described in detail. In the present embodiment, the first rinsing pipe 77, the upper rinsing pipe 78A, and the lower rinsing pipe 78B are formed of resin. The upper rinsing pipe 78A and the lower rinsing pipe 78B are constituted by a single second rinsing pipe 78. One end side of the second rinsing pipe 78 constitutes the upper rinsing pipe 78A. The other end side 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 injection holes 33 from one end and supplies rinsing water to the rinsing injection holes 43 from the other end.

[0037] The first rinsing pipe 77 has one end connected to the rinsing pump 7 and supplies rinsing water from the other end to the second rinsing pipe 78. As shown in FIGS. 3 and 4, the first rinsing pipe 77 includes 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.

[0038] As shown in FIG. 4, the first portion 77a constitutes one end connected to the rinsing pump 7. The first portion 77a is connected to the discharge port facing the left side in the rinsing pump 7. The first portion 77a is located on the right side and in the front side with respect to the storage portion 22 of the cleaning tank 20. The first portion 77a extends in the left - right direction. The second portion 77b is located on the right side and in the front side with respect to the storage portion 22 in the machine room 1A.

[0039] The third portion 77c constitutes the other end connected to the second rinsing pipe 78. The third portion 77c is arranged in front of the front side portion 22B of the storage portion 22 and bends rearward 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 central portion in the front - rear direction of the machine room 1A, and extends in the vertical direction along the side portion 21B of the water receiving portion 21 and the side panel 2A.

[0040] As shown in FIG. 4, in the third portion 77c, in the part located in the machine room 1A and arranged in the front side in the front - rear direction (in front of the front side portion 22B of the storage portion 22), an injection portion 77d for the rinse agent supplied from the rinse agent supply pump 9 is provided. A pipe 9B is connected to the injection portion 77d. As shown in FIG. 6, the third portion 77c is arranged above the constant water level H2 of the rinsing tank 6.

[0041] As shown in FIGS. 3 and 5, the first rinsing pipe 77 and the second rinsing pipe 78 have extending portions that extend in the same direction with a predetermined interval therebetween. 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 portion. In the present embodiment, the connecting portion 70 connects a portion that extends in the vertical direction in the third portion 77c of the first rinsing pipe 77 and a portion that extends in the vertical direction in the second rinsing pipe 78. The connecting portion 70 is a plate-like member. The connecting portion 70 is provided with a fixing portion 72 for fixing the connecting portion 70 to a fixing target. In the present 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 a bolt B is inserted. As shown in FIG. 3, the fixing portion 72 is fixed to the side portion 21B by a bolt B. Note that the fixing portion 72 may be fixed to the side panel 2A.

[0042] The third portion 77c of the first rinsing pipe 77 is connected to the side portion of the second rinsing pipe 78 in the extending portion of the second rinsing pipe 78. With this configuration, the washing 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. At the end portion (upper end portion) of the third portion 77c of the first rinsing pipe 77 that is connected to the second rinsing pipe 78, it has a curved shape that protrudes upward. The third portion 77c of the first rinsing pipe 77 is connected so as to face upward when viewed from the second rinsing pipe 78.

[0043] 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 position of the highest water level H3 of the rinsing water flowing through the third portion 77c of the first rinsing pipe 77. Further, 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 holes 43 of the lower nozzle 4. The second rinsing pipe 78 is partitioned into an upper rinsing pipe 78A and a lower rinsing pipe 78B with the connection portion 77e with the first rinsing pipe 77 as a boundary.

[0044] As shown in FIG. 3, the lower rinsing pipe 78B extends vertically along the side panel 2A, the left side portion 21B of the water receiving portion 21, and the left side portion 22B of the storage portion 22, bends at its lower end, and extends in the front-rear direction along the left side portion 22B of the cleaning tank 20. As shown in FIG. 4, the lower rinsing pipe 78B extends to the front side of the storage portion 22 and bends toward the left at the front side of the storage portion 22. The lower rinsing pipe 78B extends in the left-right direction along the front side portion 22B of the storage portion 22 and bends toward the rear at the right side of the storage portion 22.

[0045] As shown in FIGS. 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 surface constituting the cleaning chamber 1B and the wall surface constituting the cleaning tank 20. In the present embodiment, the third portion 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 (the side portion 21B of the water receiving portion 21, the 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 (the side portion 21B of the water receiving portion 21, the side portion 22B of the storage portion 22). Here, in the present embodiment, being arranged along the outer surface means being arranged at a distance from the outer surface without contacting 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 surface constituting the cleaning chamber 1B and the wall surface constituting the cleaning tank 20. Note that the first rinsing pipe 77 and the second rinsing pipe 78 may contact the above outer surface.

[0046] Next, the operation and effects of the dishwasher 100 of the present embodiment will be described. In the dishwasher 100 of the above embodiment, the third part 77c of the first rinsing pipe 77 is connected to the side part of the second rinsing pipe 78 at the extending part of the second rinsing pipe 78. In this configuration, when the 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 extending part. Further, when the washing water flows in from the lower rinsing pipe 78B side of the second rinsing pipe 78, it is possible to suppress the washing water from reaching the connection part 77e between the first rinsing pipe 77 and the second rinsing pipe 78. Therefore, even when the washing water flows into the second rinsing pipe 78, it is possible to suppress the rinsing water from flowing from the second rinsing pipe 78 into the first rinsing pipe 77. Thus, it is possible to suppress the washing water from flowing into the rinsing tank 6 without providing a backflow prevention valve. Therefore, it is possible to suppress the washing water from flowing into the rinsing tank 6 while suppressing an increase in cost.

[0047] In the dishwasher 100 according to the present embodiment, the first rinsing pipe 77 has an extending part that extends in the vertical direction. The other end of the third part 77c of the first rinsing pipe 77 is located on the upper end side of the extending part of the first rinsing pipe 77. The connection part 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 extending part of the first rinsing pipe 77. In this configuration, it is possible to further suppress the washing water from flowing from the second rinsing pipe 78 into the first rinsing pipe 77. Therefore, it is possible to more reliably suppress the washing water from flowing into the rinsing tank 6.

[0048] In the dishwasher 100 according to the present embodiment, the connection part 77e between the first rinsing pipe 77 and the second rinsing pipe 78 is located above the rinsing injection holes 43 of the lower nozzle 4. In this configuration, even when the washing water flows in from the lower rinsing pipe 78B side of the second rinsing pipe 78, it is possible to suppress the washing water from reaching the connection part 77e between the first rinsing pipe 77 and the second rinsing pipe 78. Therefore, it is possible to more reliably suppress the rinsing water from flowing from the second rinsing pipe 78 into the first rinsing pipe 77.

[0049] The embodiments of the present invention have been described above. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof.

[0050] In the above embodiment, as an example, the form in which the upper rinsing pipe 78A and the lower rinsing pipe 78B of the second rinsing pipe 78 extend linearly in the vertical direction at the connection position with the third part 77c of the first rinsing pipe 77 has been described. 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 part 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, since the connection part 77e of the third part 77c of the first rinsing pipe 77 faces downward, it is possible to further suppress the inflow of water from the second rinsing pipe 78 into the first rinsing pipe 77.

[0051] In the above embodiment, as an example, the form in which the first rinsing pipe 77 and the second rinsing pipe 78 are connected by the connecting part 70 and the first rinsing pipe 77 and the second rinsing pipe 78 are fixed to the side part 21B of the water receiving part 21 by the fixing part 72 of the connecting part 70 has been described. 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, fixing brackets.

[0052] <Other Modification Examples> In the above embodiment and modification examples, the example in which the rack rail 23 is integrally formed with the side panel 2A by extrusion has been described. However, the rack rail 23 may be formed by attaching other members to the inner surface of the side panel 2A.

[0053] The above embodiment and modification examples are applicable not only to the dishwasher 100 of the type in which the door part 15 is provided on the front side of the main body part 1, but also to, for example, dishwashers of the type in which the door part opens and closes vertically.

[0054] In the above-described embodiments and modified examples, 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 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 main body 1 of the dishwasher 100 and heats the water stored in the rinsing tank by a heat source such as gas or electricity to the upper nozzle 3 and the lower nozzle 4.

[0055] The present invention may appropriately combine the above-described embodiments and other modified examples.

Explanation of Reference Numerals

[0056] 1B... washing chamber, 5... washing pump, 7... rinsing pump, 20... washing tank, 31, 41... washing injection holes, 33... rinsing injection hole (first rinsing injection hole), 43... rinsing injection hole (second rinsing injection 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... tableware (object to be washed), H3... maximum water level.

Claims

1. A washing machine for washing an object to be washed accommodated in a washing chamber, comprising: a washing tank for storing washing water for washing the object to be washed; washing injection holes for injecting the washing water into the washing chamber; a washing pump for injecting the washing water stored in the washing tank into the washing chamber through the washing injection holes; rinsing injection holes for injecting rinsing water for rinsing the object to be washed into the washing chamber; a rinsing pump for injecting the rinsing water into the washing chamber through the rinsing injection holes; a rinsing pipe connecting the rinsing injection holes and the rinsing pump, wherein the rinsing injection holes include a first rinsing injection hole for injecting the rinsing water into the washing chamber from above the washing chamber and a second rinsing injection hole for injecting the rinsing water into the washing chamber from below the washing chamber; 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 supplying the rinsing water from one end to the first rinsing injection hole and supplying the rinsing water from the other end to the second rinsing injection hole; the second rinsing pipe has an extending portion extending in the vertical direction; the other end of the first rinsing pipe is connected to a side portion of the second rinsing pipe at the extending portion of the second rinsing pipe; the first rinsing pipe has an extending portion extending in the vertical direction; the other end of the first rinsing pipe is located on the upper end side of the extending portion of the first rinsing pipe; A washing machine, wherein a connection portion between the first rinsing pipe and the second rinsing pipe is located below a position of a highest water level of the rinsing water flowing through the extending portion of the first rinsing pipe.

2. The washing 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 injection hole.

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