JP2021041049A - Dish washer and flow passage switching module - Google Patents

Abstract

To perform washing and draining with one pump, to surely perform switching of a flow passage during washing and during draining, and to avoid complication of piping for washing and piping for draining.SOLUTION: A dish washer 100 includes a flow passage switching module 1 and a washing tank 102. The flow passage switching module 1 includes: a housing 2 including a washing liquid storage part 15; a pump 3 for feeding a washing liquid to the washing liquid storage part 15; a flow passage switching part 16 for draining for opening/closing a drain port 18 provided at the washing liquid storage part 15; a flow passage switching part 17 for feeding being provided at a connection portion between the washing liquid storage part 15 and a plurality of flow passages 105A, 105B, 105C, 105D, and for switching the connection state between the washing liquid storage part 15 and the plurality of flow passages 105A, 105B, 105C, 105D; and a drive part 50 for driving the flow passage switching part 17 for feeding. The flow passage switching part 16 for draining is driven by an operation of the flow passage switching part 17 for feeding and opens/closes the drain port 18.SELECTED DRAWING: Figure 8

Description

The present invention relates to a dishwasher and a flow path switching module that switches the flow path of the washing water of the dishwasher.

Patent Documents 1 and 2 disclose a dishwasher including a pump. In the dishwasher (dishwasher / dryer) of Patent Document 1, a water storage tank is arranged below the washing tank. During the washing operation for washing dishes, the pump is rotated in the normal direction to send the hot water for washing stored in the water storage unit to the nozzle of the washing tank, and in the drainage operation, the pump is reversed to drain the water. The pump is provided with a normal rotation discharge port connected to the washing tank and a reverse rotation discharge port connected to the drain side flow path, and swings between the normal rotation discharge port and the reverse rotation discharge port. The expression valve is placed. When the rotation direction of the pump is switched, the direction of the water flow changes and the valve rotates, switching between a state in which the valve closes the discharge port during normal rotation and a state in which the discharge port is closed during reverse rotation.

The dishwasher (dishwasher) of Patent Document 2 includes a washing pump and a drainage pump. When the cleaning pump is driven, the water in the cleaning water tank located at the bottom of the cleaning tank is sent out to the cleaning tank. When the drainage pump is driven, the water in the wash water tank is drained. Between the washing water pump and the washing tank, a washing switching device that switches the flow path of the washing water to a plurality of flow paths at the time of washing is arranged. The cleaning switching device includes a rotating plate (switching valve) arranged so as to close the opening of the case partitioned by the partition wall, and by rotating the rotating plate, the flow path to which the cleaning water is supplied is switched. As a result, cleaning is performed by switching the nozzles that discharge the cleaning liquid in the cleaning tank.

Japanese Unexamined Patent Publication No. 2013-9706 Japanese Unexamined Patent Publication No. 2006-320441

In Patent Document 2, separate pumps are used for cleaning and draining, but in Patent Document 1, cleaning and draining can be performed by a common pump, so that the number of pumps can be reduced. However, in Patent Document 1, since the valve is rotated by the water flow that hits the swing-type valve, there is a possibility that the valve cannot be opened and closed reliably. Therefore, there is a possibility that the washing water may leak to the flow path on the side where the washing water does not flow.

Since the cleaning switching device of Patent Document 2 switches the flow path of the cleaning water by rotating the rotary plate (switching valve) having a hole with a motor, the flow path can be reliably switched. However, the cleaning switching device of Patent Document 2 does not switch between drainage and cleaning. Further, when switching between drainage and cleaning is performed by a device for rotating a rotating plate having a hole as in Patent Document 2, it is necessary to extend the drainage pipe and the cleaning pipe from the same direction toward the rotating plate. Therefore, there is a problem that the arrangement of the pipes is greatly restricted and the pipes are complicated.

In view of the above problems, the subject of the present invention is that cleaning and drainage are performed by one pump, the flow path during cleaning and drainage is reliably switched, and the piping for cleaning and drainage are used. The purpose is to avoid complication of piping.

In order to solve the above problems, the flow path switching module of the present invention opens and closes a housing provided with a cleaning liquid accommodating portion, a pump for feeding the cleaning liquid to the cleaning liquid accommodating portion, and a drain port provided in the cleaning liquid accommodating portion. A delivery flow path switching unit provided at a connection portion between the drainage flow path switching unit and the cleaning liquid accommodating unit and the plurality of flow paths, and switching the connection state between the cleaning liquid accommodating unit and the plurality of flow paths, and the above. It has a drive unit for driving the delivery flow path switching unit, and the drainage flow path switching unit is driven by the operation of the delivery flow path switching unit to open and close the drain port.

According to the present invention, the delivery flow path switching unit is driven by the drive unit, and the drainage flow path switching unit is driven by the operation of the delivery flow path switching unit. In addition, drainage and cleaning liquid are supplied by a common pump. Therefore, the number of drive units and pumps can be reduced. Further, since both the delivery flow path switching unit and the drainage flow path switching unit are driven by the driving force of the driving unit, the drain port can be reliably opened and closed, and the flow path can be reliably switched. Therefore, it is possible to reduce the leakage of unintended washing water. Further, since the delivery flow path switching part and the drainage flow path switching part can be provided at different positions, it is necessary to connect the drainage flow path and the flow path to which the washing water is supplied to the cleaning liquid accommodating part from the same direction. There is no. Therefore, since there are few restrictions on the connection position and connection direction of the pipe with respect to the housing, it is possible to avoid complication of the pipe.

In the present invention, the delivery flow path switching portion is a fixing member provided with a plurality of delivery holes for connecting the cleaning liquid accommodating portion and the plurality of flow paths, and the fixing member from the inside of the cleaning liquid accommodating portion to the fixing member. It is preferable that an overlapping rotating member is provided, and the connection state between the through hole provided in the rotating member and the plurality of delivery holes is switched according to the rotation position of the rotating member. In this way, the flow path can be switched by a simple structure. In addition, it is easy to change the positions and numbers of the delivery holes and the through holes. Therefore, the degree of freedom in changing the position and number of flow paths can be increased.

In the present invention, it is preferable that the drainage flow path switching portion includes a valve member that opens and closes the drainage port, and the rotating member includes a cam portion that drives the valve member. In this way, the connection state of the flow path and the open / closed state of the valve member can be linked with each other with a simple structure.

In the present invention, the driving unit rotates the rotating member in one direction, and the cam unit causes the valve member to open and close once while the rotating member rotates once. Is preferable. In this way, all operation modes (plurality of cleaning modes and drainage modes) can be realized without switching the rotation direction of the rotating member, so that the drive unit can be easily controlled.

In the present invention, the cleaning liquid accommodating portion includes an inflow port connected to the pump and an inclined flow path provided between the inflow port and the delivery flow path switching unit, and the inclined flow path is provided. Is provided with an inclined surface that rises as it moves away from the inflow port, and the drainage port is preferably arranged between the inflow port and the inclined flow path. In this way, since the drain port is arranged near the inflow port, the inflowing cleaning liquid can be drained smoothly. Further, when the drain port is closed, the cleaning liquid flows upward along the inclined surface. Therefore, even when the delivery flow path switching unit is arranged at the upper end of the cleaning liquid storage unit, the cleaning water can be smoothly sent to the delivery flow path switching unit.

In the present invention, a cleaning liquid filtering unit for accommodating a cleaning liquid before being supplied to the pump is provided, and the cleaning liquid filtering unit passes through a recess formed in the housing, a filter arranged in the recess, and the filter. It is preferable to provide an outlet for delivering the cleaning liquid to the pump. In this way, foreign matter in the cleaning liquid can be removed before the cleaning liquid is supplied to the cleaning liquid storage portion. Therefore, it is possible to prevent the operation of the drainage flow path switching portion and the delivery flow path switching portion from being hindered by foreign matter.

Next, the dishwasher of the present invention has the above-mentioned flow path switching module and a washing tank, and is characterized in that a washing liquid is supplied to the washing tank from the plurality of flow paths.

According to the present invention, the delivery flow path switching unit is driven by the drive unit, and the drainage flow path switching unit is driven by the operation of the delivery flow path switching unit. In addition, drainage and cleaning liquid are supplied by a common pump. Therefore, the number of drive units and pumps can be reduced. Further, since both the delivery flow path switching unit and the drainage flow path switching unit are driven by the driving force of the driving unit, the drain port can be reliably opened and closed, and the flow path can be reliably switched. Therefore, it is possible to reduce the leakage of unintended washing water. Further, since the delivery flow path switching part and the drainage flow path switching part can be provided at different positions, it is necessary to connect the drainage flow path and the flow path to which the washing water is supplied to the cleaning liquid accommodating part from the same direction. There is no. Therefore, since there are few restrictions on the connection position and connection direction of the pipe with respect to the housing, it is possible to avoid complication of the pipe.

It is a schematic block diagram which shows the main part of the dishwasher provided with the flow path switching module which concerns on embodiment of this invention. It is a side view and bottom view of the flow path switching module which concerns on embodiment of this invention. It is a cross-sectional perspective view which shows the internal structure of the flow path switching module of FIG. It is a perspective view which looked at the flow path switching part and the cleaning liquid filtration part which removed the fixing member from obliquely above. It is a perspective view which looked at the flow path switching part and the cleaning liquid filtration part which removed the fixing member and the rotating member from obliquely above. It is a perspective view which looked at the flow path switching part and the cleaning liquid filtration part which removed the fixing member and the rotating member from the direction different from FIG. It is a perspective view which looked at the rotating member and a valve member from diagonally below. It is explanatory drawing of the opening operation of a valve member and the rotation position of a rotating member. It is explanatory drawing of the closing operation of a valve member and the rotation position of a rotating member.

Hereinafter, embodiments of a dishwasher and a flow path switching module to which the present invention is applied will be described with reference to the drawings.

(Dishwasher)
FIG. 1 is a schematic configuration diagram showing a main part of a dishwasher 100 provided with a flow path switching module 1 according to an embodiment of the present invention. The dishwasher 100 includes an outer case 101 and a washing tank 102 arranged inside the outer case 101. Inside the washing tank 102, a basket-shaped rack 104 on which various tableware 103 is placed is arranged. Below the cleaning tank 102, a flow path switching module 1 for supplying and draining the cleaning liquid is arranged. The cleaning liquid is supplied from the flow path 105 connecting the flow path switching module 1 and the cleaning tank 102 to a nozzle (not shown) provided in the cleaning tank 102, and is ejected from the nozzle to wash the tableware 103.

When washing the dishes 103, the dishwasher 100 operates in a washing mode in which the washing liquid is supplied from the flow path switching module 1 to the washing tank 102. Further, after the washing of the tableware 103 is completed, the mode is switched to the drainage mode in which the cleaning liquid is drained from the flow path switching module 1. When the flow path switching module 1 enters the cleaning mode, the flow path switching module 1 switches to a state of supplying the cleaning liquid to the flow path 105 connected to the cleaning tank 102. Further, in the drainage mode, the state is switched to the state where the cleaning liquid is drained to the outside.

In the dishwasher of this embodiment, nozzles are arranged at a plurality of positions in the washing tank 102. The flow path 105 connecting the flow path switching module 1 and the cleaning tank 102 includes a plurality of flow paths as described later, and each flow path is connected to nozzles at different positions from each other. The washing mode of the dishwasher 100 includes a plurality of washing modes in which some or all of the nozzles for ejecting washing water are different from each other. Therefore, the flow path switching module 1 can switch the flow path to which the cleaning liquid is supplied, as will be described later.

(Flow path switching module)
FIG. 2A is a side view of the flow path switching module 1 according to the embodiment of the present invention, and FIG. 2B is a bottom view of the flow path switching module 1 according to the embodiment of the present invention. In the present specification, XYZ are directions orthogonal to each other. The Z direction is the vertical direction, Z1 is upward, and Z2 is downward. Further, one side in the X direction is X1, the other side is X2, one side in the Y direction is Y1, and the other side is Y2. The flow path switching module 1 includes a housing 2 arranged in Z2 below the cleaning tank 102, a pump 3 arranged outside the housing 2, and a geared motor 4. The geared motor 4 is fixed to the bottom of the housing 2. A first flow path 5, a second flow path 6, and a third flow path 7 are connected to the housing 2. The first flow path 5 and the second flow path 6 connect the housing 2 and the pump 3. Further, the third flow path 7 is a drainage flow path for draining the cleaning liquid to the outside.

FIG. 3 is a cross-sectional perspective view showing the internal structure of the flow path switching module 1 of FIG. 2, and is a perspective view of the flow path switching unit 8 and the cleaning liquid filtration unit 9 viewed from diagonally above. As shown in FIG. 3, inside the housing 2, the flow path switching unit 8 and the cleaning liquid filtration unit 9 are arranged side by side in the X direction. The first flow path 5 is connected to the cleaning liquid filtration unit 9, extends from the cleaning liquid filtration unit 9 in the Y1 direction, bends in the X1 direction, and is connected to the pump 3. The second flow path 6 is connected to the flow path switching unit 8, extends from the flow path switching unit 8 in the Y1 direction, and is connected to the pump 3. The flow path switching module 1 sends the cleaning liquid that has flowed into the cleaning liquid filtration unit 9 from a flow path (not shown) to the flow path switching unit 8 by the pump 3.

The cleaning liquid filtration unit 9 includes a recess 10 formed in the housing 2 and a filter 11 arranged in the recess 10. Foreign matter is removed from the cleaning liquid that has flowed into the recess 10 when it passes through the filter 11. When the pump 3 is driven, the cleaning liquid in the recess 10 is sucked into the first flow path 5 from the outlet 12 (see FIG. 6) formed on the inner surface of the recess 10. As shown in FIG. 2, the housing 2 includes a first projecting portion 13 projecting toward the Z2 side and a second projecting portion 14 adjacent to the first projecting portion 13 on the X1 side, and the recess 10 is a first. It is formed inside the protrusion 13. The first flow path 5 is connected to the side surface of the first protrusion 13, and the second flow path 6 is connected to the side surface of the second protrusion 14.

A flow path 105 for supplying the cleaning liquid to the nozzle in the cleaning tank 102 is connected to the flow path switching unit 8. In this embodiment, the flow path 105 includes four flow paths 105A, 105B, 105C, and 105D. The flow path switching unit 8 includes four delivery holes 8A, 8B, 8C, 8D to which these four flow paths 105A, 105B, 105C, and 105D are connected. In the cleaning mode, the flow path switching module 1 sends the cleaning liquid from the flow path switching unit 8 to the flow path 105. At this time, the flow path switching unit 8 sends the cleaning liquid to one or two of the four flow paths 105A, 105B, 105C, and 105D. The flow path switching unit 8 can switch the flow path for delivering the cleaning liquid. On the other hand, in the drainage mode, the cleaning liquid is drained from the flow path switching unit 8 to the outside via the third flow path 7 (see FIG. 2B).

(Flow path switching part)
FIG. 4 is a perspective view of the flow path switching unit 8 and the cleaning liquid filtration unit 9 from which the fixing member 40 has been removed, as viewed from diagonally above. FIG. 5 shows a flow path switching portion 8 from which the fixing member 40 and the rotating member 30 have been removed.
It is a perspective view which looked at the cleaning liquid filtration part 9 from diagonally above. FIG. 6 is a perspective view of the flow path switching unit 8 and the cleaning liquid filtration unit 9 from which the fixing member 40 and the rotating member 30 are removed from a direction different from that of FIG. R1 shown in FIG. 4 is one side in the circumferential direction, and R2 is the other side in the circumferential direction. The flow path switching unit 8 switches the flow path by rotating the rotating member 30 in the R1 direction or the R2 direction.

The flow path switching unit 8 includes a cleaning liquid accommodating unit 15 (see FIGS. 5 and 6) formed in the housing 2, a drainage flow path switching unit 16 provided inside the cleaning liquid accommodating unit 15, and a cleaning liquid accommodating unit 15. A delivery flow path switching unit 17 provided at the upper end of the housing is provided. As shown in FIGS. 5 and 6, the cleaning liquid accommodating portion 15 is a recess recessed toward the Z2 side, and is formed inside the second protruding portion 14 of the housing 2. As shown in FIG. 5, a drain port 18 opens on the inner surface of the cleaning liquid accommodating portion 15. Since the drainage port 18 communicates with the third flow path 7 (see FIG. 2B), which is a drainage flow path, the cleaning liquid in the cleaning liquid accommodating portion 15 is discharged to the outside from the drainage port 18.

The drainage flow path switching unit 16 includes a valve member 20 that opens and closes the drainage port 18, and an urging member 21 that urges the valve member 20 toward the drainage port 18. The valve member 20 is oscillatingly held around one end arranged on the inner peripheral surface of the cleaning liquid accommodating portion 15. The valve member 20 is placed between the closed position 20A (see FIGS. 8A and 9C) that closes the drainage port 18 and the open position 20B (see FIGS. 5 and 6) that opens the drainage port 18. It can swing. As will be described later, the opening / closing operation of the valve member 20 is performed based on the operation of the delivery flow path switching unit 17.

As shown in FIGS. 5 and 6, a circular opening 150 that opens in the Z1 direction is formed at the upper end of the cleaning liquid storage portion 15. Further, a recess 151 recessed in the Z2 direction is formed inside the opening 150. The concave portion 151 includes a first concave portion 153 formed on the X1 side of the convex portion 152 arranged at the center of the cleaning liquid accommodating portion 15 in the radial direction, and a second concave portion 154 formed on the X2 side of the convex portion 152. There is. The first recess 153 and the second recess 154 are connected on the Y2 side of the convex portion 152, but when the valve member 20 moves to the open position 20B, the valve member 20 separates the first recess 153 and the second recess 154. Will be done. In the present embodiment, the bottom surface of the second recess 154 is a spiral inclined surface 155 that rises in the circumferential direction toward the direction away from the first recess 153. Therefore, the second recess 154 forms an inclined flow path extending spirally.

As shown in FIG. 6, the cleaning liquid accommodating portion 15 includes an inflow port 19 formed on the inner surface of the first recess 153 on the Y1 side. Further, as shown in FIG. 5, the drainage port 18 is formed on the inner surface of the first recess 153 at a position facing the inflow port 19. The inflow port 19 is connected to the pump 3 via the second flow path 6. Therefore, the cleaning liquid flows from the inflow port 19 into the first recess 153 of the cleaning liquid accommodating portion 15. As shown in FIGS. 5 and 6, when the valve member 20 moves to the open position 20B, the drain port 18 is opened and the first recess 153 and the second recess 154 are partitioned by the valve member 20. Therefore, the washing water that has flowed from the inflow port 19 into the first recess 153 is discharged from the drain port 18 without flowing into the second recess 154. On the other hand, when the valve member 20 moves to the closed position 20A (see FIGS. 8A and 9C), the first recess 153 and the second recess 154 communicate with each other to block the drain port 18, so that the flow flows. The washing water that has flowed into the first recess 153 from the inlet 19 flows into the second recess 154 and flows around the convex portion 152 in the circumferential direction.

The delivery flow path switching unit 17 is a mechanism for switching the connection state between the plurality of flow paths 105A, 105B, 105C, 105D and the cleaning liquid accommodating unit 15. The delivery flow path switching portion 17 overlaps the disc-shaped rotating member 30 (see FIG. 4) arranged in the circular opening 150 provided at the upper end of the cleaning liquid accommodating portion 15 from the Z1 side. A substantially rectangular plate-shaped fixing member 40 (see FIG. 3) and a driving unit 50 for rotating the rotating member 30 are provided. The fixing member 40 has four corners screwed to the boss portion 41 provided in the housing 2. The drive unit 50 includes a geared motor 4 (see FIG. 2B) fixed to the bottom of the second protruding portion 14 of the housing 2, and a drive shaft 51 that transmits the rotation of the geared motor 4 to the rotating member 30. The geared motor 4 includes a motor and a reduction mechanism (not shown), and reduces the rotation of the motor and transmits it to the drive shaft 51. The motor is a stepping motor. As shown in FIGS. 5 and 6, the drive shaft 51 is arranged at the center of the opening 150. The rotating member 30 is connected to the end of the drive shaft 51 in the Z1 direction and rotates integrally with the drive shaft 51.

The rotating member 30 is provided with through holes 31A and 31B at two locations, and the fixing member 40 overlapping the rotating member 30 from the Z1 side is provided with delivery holes 8A, 8B, 8C and 8D at four locations. The through holes 31A and 31 and the delivery holes 8A, 8B, 8C and 8D have the same shape, and the distances in the radial direction from the rotation center of the rotating member 30 are formed at the same position. Therefore, while the rotating member 30 makes one rotation, the through holes 31A and 31B and the delivery holes 8A, 8B, 8C and 8D are overlapped once, respectively. Since the flow path connected to the flow path hole overlapping the through holes 31A and 31B communicates with the cleaning liquid accommodating portion 15, the cleaning liquid is supplied.

The delivery flow path switching unit 17 passes through all the overlapping states of the through holes 31A and 31B and the delivery holes 8A, 8B, 8C and 8D while the rotating member 30 makes one rotation, and the cleaning liquid storage units 15 and 4 It goes through all the connection states with the flow paths 105A, 105B, 105C, and 105D of the book. As shown in FIGS. 3 and 4, in the present embodiment, the circumferential spacing of the through holes 31A and 31B is the circumferential spacing of the sending holes 8A and 8B and the circumferential spacing of the sending holes 8C and 8D. Match. Therefore, in the present embodiment, it is possible to supply the cleaning liquid in a part or all of the following first to sixth cleaning modes. For example, when the rotating member 30 is rotated in the R1 direction shown in FIG. 4, the cleaning mode is switched in the order of the first cleaning mode to the sixth cleaning mode.
-First cleaning mode: Supply the cleaning liquid to the flow path 105A-Second cleaning mode: Supply the cleaning liquid to the flow paths 105A and 105B at the same time-Third cleaning mode: Supply the cleaning liquid to the flow path 105B-Fourth cleaning mode : Supply the cleaning liquid to the flow path 105C ・ Fifth cleaning mode: Supply the cleaning liquid to the flow paths 105C and 105D at the same time ・ Sixth cleaning mode: Supply the cleaning liquid to the flow path 105D

FIG. 7 is a perspective view of the rotating member 30 and the valve member 20 as viewed from diagonally below. The flow path switching unit 8 switches between the cleaning mode and the drainage mode by driving the valve member 20 of the drainage flow path switching unit 16 by the rotational operation of the rotating member 30 provided in the delivery flow path switching unit 17. Do. As shown in FIG. 7, the rotating member 30 includes a disk portion 32 in which the through holes 31A and 31B are formed, a shaft portion 33 protruding from the center of the disk portion 32 toward the Z2 side, and an outer circumference of the disk portion 32. A cam portion 34 protruding from the portion toward the Z2 side is provided. In the rotating member 30, the tip of the shaft portion 33 is fitted into the fitting recess 156 provided at the tip of the convex portion 152 arranged at the center of the cleaning liquid accommodating portion 15, and the through hole 35 penetrating the shaft portion 33. The tip portion of the drive shaft 51 is inserted into the drive shaft 51.

The cam portion 34 is a protruding portion that protrudes from the rotating member 30 to the inside (that is, the Z2 side) of the cleaning liquid accommodating portion 15. A cam surface 36 extending in the circumferential direction is formed on the inner peripheral side surface of the cam portion 34. The cam surface 36 has a curved first cam surface 361 that goes toward the inner peripheral side from one side R1 in the circumferential direction toward the other side R2, and an arc-shaped second cam that connects to the other side R2 of the first cam surface 361. A surface 362 and a third cam surface 363 connected to the other side R2 of the second cam surface 362 are provided. The third cam surface 363 is a curved surface that goes toward the outer peripheral side from one side R1 in the circumferential direction toward the other side R2.

The valve member 20 includes a plate-shaped valve body portion 22 that opens and closes the drain port 18, and a shaft portion 23 provided at one end of the valve body portion 22, and is supported so as to be swingable around the shaft portion 23. To. The urging member 21 is a torsion coil spring attached to the shaft portion 23. The urging force of the urging member 21 acts in the direction of swinging the valve body portion 22 toward the drain port 18. The valve member 20 includes a cam pin 24 protruding from the Z1 side edge of the valve body portion 22. When the cam portion 34 provided on the rotating member 30 passes through the same circumferential position as the cam pin 24, the cam pin 24 is pressed by the cam surface 36 provided on the cam portion 34. As a result, the valve member 20 is driven in the opening direction against the urging force of the urging member 21.

(Opening operation of valve member)
FIG. 8 is an explanatory view of the opening operation of the valve member 20 and the rotation position of the rotating member 30. While the valve member 20 is in a rotational position where the cam pin 24 does not come into contact with the cam surface 36, the valve member 20 moves to the closed position 20A by the urging force of the urging member 21 and closes the drain port 18. When the rotating member 30 is rotated in one side R1 in the circumferential direction (see FIGS. 4 and 7), as shown in FIG. 8A, the end portion of the one side R1 in the circumferential direction of the first cam surface 361 becomes a valve. It comes into contact with the cam pin 24 of the member 20. At this time, since most of the delivery hole 8D of the fixing member 40 and the through hole 31A of the rotating member 30 overlap each other in the delivery flow path switching unit 17, the cleaning liquid can be supplied from the cleaning liquid storage unit 15 to the flow path 105D. is there.

When the rotating member 30 is further rotated from the state of FIG. 8A, the cam pin 24 is moved to the inner peripheral side along the first cam surface 361 as shown in FIG. 8B. As a result, the valve member 20 moves in the opening direction against the urging force of the urging member 21. At this time, at the same time, the deviation between the delivery hole 8D and the through hole 31A becomes large. As shown in FIG. 8C, when the rotating member 30 rotates to a position where the cam pin 24 reaches the end of the other side R2 in the circumferential direction of the first cam surface 361, the valve member 20 moves to the open position 20B. .. Further, at this time, the delivery hole 8D and the through hole 31A are completely displaced from each other. Therefore, the cleaning liquid is not supplied to the flow path 105D at all.

(Valve member closing operation)
FIG. 9 is an explanatory diagram of the closing operation of the valve member 20 and the rotation position of the rotating member 30. The valve member 20 is held in the open position 20B while the cam pin 24 is in contact with the second cam surface 362. As shown in FIG. 9A, the valve member 20 is still held at the open position 20B in a state where the cam pin 24 is in contact with the connection position between the second cam surface 362 and the third cam surface 363. At this time, in the delivery flow path switching portion 17, the delivery hole 8A of the fixing member 40 and the through hole 31B of the rotating member 30 slightly overlap each other.

When the rotating member 30 is further rotated from the state of FIG. 9 (a), as shown in FIG. 9 (b), the cam pin 24 is moved to the outer peripheral side along the third cam surface 363 due to the urging force of the urging member 21. The valve member 20 moves in the closing direction. At the same time, the overlap between the delivery hole 8A and the through hole 31B becomes large. As shown in FIG. 8C, when the rotating member 30 rotates to a position where the cam pin 24 reaches the end of the other side R2 in the circumferential direction of the third cam surface 363, the valve member 20 moves to the closed position 20A. .. Further, at this time, since most of the delivery hole 8A and the through hole 31B overlap each other, the cleaning liquid can be supplied from the cleaning liquid accommodating portion 15 to the flow path 105A.

(Main action and effect of this form)
As described above, the dishwasher 100 of the present embodiment has the flow path switching module 1 and the washing tank 102, and the flow path switching module 1 passes through a plurality of flow paths 105A, 105B, 105C, 105D. The cleaning liquid is supplied to the cleaning tank 102. The flow path switching module 1 of the present embodiment includes a housing 2 provided with a cleaning liquid accommodating portion 15, a pump 3 for feeding the cleaning liquid to the cleaning liquid accommodating portion 15, and a drainage port 18 provided in the cleaning liquid accommodating portion 15 for opening and closing the drainage port 18. The use flow path switching unit 16 is provided at the connection portion between the cleaning liquid accommodating unit 15 and the plurality of flow paths 105A, 105B, 105C, 105D, and the cleaning liquid accommodating unit 15 and the plurality of flow paths 105A, 105B, 105C, 105D are provided. It has a transmission flow path switching unit 17 for switching the connection state, and a drive unit 50 for driving the transmission flow path switching unit 17. The drainage flow path switching unit 16 is driven by the operation of the delivery flow path switching unit 17 to open and close the drainage port 18.

As described above, in the flow path switching module 1 of the present embodiment, the transmission flow path switching unit 17 is driven by the drive unit 50, and the drainage flow path switching unit 16 is driven by the operation of the transmission flow path switching unit 17. .. Further, the drainage and the cleaning liquid are supplied by a common pump 3. Therefore, the number of pumps and drive units 50 can be reduced. Further, since both the delivery flow path switching unit 17 and the drainage flow path switching unit 16 are driven by the drive unit 50, the drain port 18 can be reliably opened and closed, and the flow paths 105A, 105B, 105C can be reliably opened and closed. , 105D connection state can be switched. Therefore, it is possible to reduce the leakage of unintended washing water. Further, since the delivery flow path switching unit 17 and the drainage flow path switching unit 16 can be provided at different positions, the drainage flow path and the flow paths 105A, 105B, 105C, 105D to which the washing water is supplied can be provided. It is not necessary to connect the cleaning liquid accommodating portion 15 from the same direction. Therefore, since there are few restrictions on the connection position and connection direction of the pipe with respect to the housing 2, it is possible to avoid complication of the pipe.

In the present embodiment, the delivery flow path switching unit 17 includes a fixing member 40 provided with a plurality of delivery holes 8A to 8D for connecting the cleaning liquid storage unit 15 and the plurality of flow paths 105A, 105B, 105C, 105D. A rotating member 30 that overlaps the fixing member 40 from the inside of the cleaning liquid accommodating portion 15 is provided, and through holes 31A and 31B provided in the rotating member 30 and a plurality of sending holes 8A to each other are provided according to the rotational position of the rotating member 30. The connection state with 8D can be switched. In such a configuration, the flow path can be switched with a simple structure. Further, since the positions and numbers of the delivery holes 8A to 8D and the through holes 31A and 31B can be easily changed, the degree of freedom of changing the positions and numbers of the plurality of flow paths can be increased.

In the present embodiment, the drainage flow path switching portion 16 includes a valve member 20 that opens and closes the drainage port 18, and the rotating member 30 includes a cam portion 34 that drives the valve member 20. In this way, by interlocking the operation of the valve member 20 with the rotating member 30 by the cam portion 34, the connection state of the plurality of flow paths 105A, 105B, 105C, 105D and the open / closed state of the valve member 20 have a simple structure. Can be linked with.

In the present embodiment, the drive unit 50 rotates the rotating member 30 in one direction, and the cam unit 34 causes the valve member 20 to open and close once while the rotating member 30 rotates once. It is configured in. In this way, while the rotating member 30 makes one rotation, all the connection states of the through holes 31A and 31B provided in the rotating member 30 and the plurality of delivery holes 8A to 8D provided in the fixing member 40 are realized. Further, the drain port 18 can be opened and closed once. Therefore, all operation modes (plurality of cleaning modes and drainage modes) can be realized without switching the rotation direction of the rotating member 30, so that the drive unit 50 can be easily controlled. The present invention is not limited to the configuration in which the rotating member 30 is rotated in one direction, and the rotating member 30 may be configured to be rotated in the forward and reverse directions.

In the present embodiment, the cleaning liquid accommodating portion 15 includes an inflow port 19 connected to the pump 3, and a second recess 154 which is an inclined flow path provided between the inflow port 19 and the delivery flow path switching unit 17. It has. The inclined flow path (second recess 154) includes an inclined surface 155 that rises as it is separated from the inflow port 19 in the circumferential direction. The drainage port 18 is formed in the first recess 153, which is a flow path provided between the inflow port 19 and the inclined flow path (second recess 154). Therefore, in the state where the drain port 18 is closed, the cleaning liquid flows upward along the inclined surface 155. Therefore, even when the delivery flow path switching unit 17 is arranged at the upper end of the cleaning liquid storage unit 15, the delivery flow path switching unit The washing water can be smoothly sent to 17. Further, since the drain port 18 is arranged near the inflow port 19, the cleaning liquid flowing in from the inflow port 19 can be smoothly drained.

In the present embodiment, the cleaning liquid filtering unit 9 for accommodating the cleaning liquid before being supplied to the pump 3 is provided, and the cleaning liquid filtering unit 9 includes a recess 10 formed in the housing 2, a filter 11 arranged in the recess 10, and a filter. Since the outlet 12 is provided to send the cleaning liquid that has passed through the cleaning liquid to the pump 3, foreign matter in the cleaning liquid can be removed before the cleaning liquid is supplied to the cleaning liquid storage unit 15. Therefore, it is possible to prevent the operation of the drainage flow path switching unit 16 and the delivery flow path switching unit 17 from being hindered by foreign matter.

1 ... Dishwasher, 1 ... Flow switching module, 2 ... Housing, 3 ... Pump, 4 ... Geared motor, 5 ... 1st flow path, 6 ... 2nd flow path, 7 ... 3rd flow path, 8 ... Flow Path switching part, 8A, 8B, 8C, 8D ... Delivery hole, 9 ... Cleaning liquid filtering part, 10 ... Recessed part, 11 ... Filter, 12 ... Outlet, 13 ... First protruding part, 14 ... Second protruding part, 15 ... Cleaning liquid accommodating part, 16 ... Drainage flow path switching part, 17 ... Delivery flow path switching part, 18 ... Drain port, 19 ... Inflow port, 20 ... Valve member, 20B ... Open position, 20A ... Closed position, 21 ... Force member, 22 ... Valve body, 23 ... Shaft, 24 ... Cam pin, 30 ... Rotating member, 31A, 31B ... Through hole, 32 ... Disc, 33 ... Shaft, 34 ... Cam, 35 ... Through hole , 36 ... cam surface, 40 ... fixing member, 41 ... boss part, 50 ... drive part, 51 ... drive shaft, 100 ... dishwasher, 101 ... exterior case, 102 ... washing tank, 103 ... tableware, 104 ... rack, 105 ... Flow path, 105A, 105B, 105C, 105D ... Flow path, 150 ... Opening, 151 ... Recessed part, 152 ... Convex part, 153 ... First concave part, 154 ... Second concave part (inclined flow path), 155 ... Inclined Surface, 156 ... Fitting recess, 361 ... 1st cam surface, 362 ... 2nd cam surface, 363 ... 3rd cam surface

Claims (7)

A housing with a cleaning solution compartment and
A pump that sends the cleaning liquid to the cleaning liquid storage unit,
A drainage flow path switching unit that opens and closes the drainage port provided in the cleaning liquid storage unit, and
A delivery flow path switching unit provided at a connection portion between the cleaning liquid accommodating portion and the plurality of flow paths and switching the connection state between the cleaning liquid accommodating portion and the plurality of flow paths.
It has a drive unit that drives the transmission flow path switching unit, and has a drive unit.
The drainage flow path switching unit is a flow path switching module characterized in that the drainage flow path switching unit is driven by the operation of the delivery flow path switching unit to open and close the drainage port. The delivery flow path switching unit is
A fixing member provided with a plurality of delivery holes for connecting the cleaning liquid accommodating portion and the plurality of flow paths.
A rotating member that overlaps the fixing member from the inside of the cleaning liquid accommodating portion is provided.
The flow path switching module according to claim 1, wherein the connection state between the through hole provided in the rotating member and the plurality of sending holes is switched according to the rotation position of the rotating member. The drainage flow path switching unit includes a valve member that opens and closes the drainage port.
The flow path switching module according to claim 2, wherein the rotating member includes a cam portion for driving the valve member. The drive unit rotates the rotating member in one direction and causes the rotating member to rotate in one direction.
The flow path switching module according to claim 3, wherein the cam portion causes the valve member to open and close once while the rotating member makes one rotation. The cleaning liquid accommodating portion
The inflow port connected to the pump and
An inclined flow path provided between the inflow port and the delivery flow path switching portion is provided.
The inclined flow path includes an inclined surface that rises as the distance from the inflow port increases.
The flow path switching module according to any one of claims 1 to 4, wherein the drain port is arranged between the inflow port and the inclined flow path. A cleaning liquid filter unit for accommodating the cleaning liquid before being supplied to the pump is provided.
A claim, wherein the cleaning liquid filtering unit includes a recess formed in the housing, a filter arranged in the recess, and an outlet for delivering the cleaning liquid that has passed through the filter to the pump. The flow path switching module according to any one of 1 to 5. The flow path switching module according to any one of claims 1 to 6 and a cleaning tank are provided.
A dishwasher characterized in that a washing liquid is supplied to the washing tank from the plurality of flow paths.

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