JP2009195741A - Dish washer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve low noise and water saving without any increase in cost and size of the whole device by selectively injecting water from a plurality of washing nozzles using one washing pump in a dish washer configured to wash dishes by injecting water from the plurality of washing nozzles. <P>SOLUTION: This dish washer includes a selector valve 17 disposed in the step of a channel connecting the washing pump and the plurality of washing nozzles, wherein the selector valve 17 includes an inlet 19 for introducing water pressurized by the washing pump, a plurality of outlets 20 for delivering the introduced water to the plurality of washing nozzles, a water flow part 18 connecting the inlet 19 and the outlets 20, and a closing member 21 for sequentially closing the outlets 20 while intermittently rotating in the water flow part 18, the closing member 21 reciprocates between the inlet 19 and the outlets 20, cam mechanisms 22 and 23 ar provided to rotate in a predetermined degree arc in one direction interlocking with the reciprocating motion, and the reciprocating motion is caused by interaction of water power of water pressurized by the washing pump and external force opposite to the water power. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dishwasher that cleans dishes by spraying water pressurized by a washing pump from a plurality of washing nozzles.

  Conventionally, this type of dishwasher has been configured as shown in FIGS. Hereinafter, the configuration will be described.

  As shown in FIGS. 9 and 10, the water supply path 1 supplies tap water to the dishwasher main body 2, and the water supply is controlled by the water supply valve 3. The washing tank 4 is provided inside the dishwasher main body 2, and a water storage part 5 for storing the supplied water is provided inside the washing tank 4, and a water level sensor 6 communicating with the water storage part 5 is provided.

  The water stored in the water storage unit 5 is heated by a hot water heater 7 provided in the water storage unit 5 and pressurized by a cleaning pump 8 and sprayed from a plurality of cleaning nozzles 9 toward the tableware in the tableware basket 10. And I try to wash the dishes. The drain pump 11 discharges the water in the cleaning tank 4.

  The dishwasher main body 2 is provided with a front door 12 that can be opened and closed so that the tableware basket 10 can be taken in and out. The leftover filter 13 captures leftovers attached to the tableware.

  The operation in the above configuration will be described. When the tableware is placed in the tableware basket 10 and accommodated in the washing tub 4 and the operation is started, the water supply valve 3 is opened and water is supplied to the washing tub 4 through the water supply path 1. The supplied water is stored in the water storage section 5 of the cleaning tank 4, and when a predetermined water level is detected by the water level sensor 6, the water supply valve 3 is closed to end the water supply, and the cleaning pump 8 is driven.

  As a result, the water stored in the water storage section 5 is heated by the hot water heater 7 and pressurized by the cleaning pump 8 and sprayed from the cleaning nozzle 9 toward the tableware in the tableware basket 10 to wash the tableware. When the cleaning is finished, the water in the cleaning tank 4 is discharged by the drain pump 11.

  In addition, as another conventional example, the basic configuration is the same as the conventional example described above, and a number of cleaning pumps corresponding to each cleaning nozzle are provided, and water is selectively injected from the cleaning nozzles, thereby reducing the operating time. There is a configuration that enables noise reduction and water saving (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 5-176875 (page 2-3, FIGS. 1 and 7)

  However, in such a conventional configuration, since water is simultaneously ejected from the plurality of cleaning nozzles 9, the noise is large and a large amount of water in the cleaning tank 4 is required.

  In addition, a configuration in which the number of cleaning pumps corresponding to each cleaning nozzle is provided and water is selectively ejected from the cleaning nozzle can reduce noise and save water, but providing multiple cleaning pumps is costly At the same time, there was a problem that the entire device was enlarged.

  The present invention solves the above-mentioned problem, and enables water to be selectively injected from a plurality of cleaning nozzles with a single cleaning pump, realizing low noise and water saving without increasing costs and increasing the size of the entire device. The purpose is to do.

  In order to achieve the above object, the present invention has a switching valve in the middle of a water channel connecting a cleaning pump and a plurality of cleaning nozzles, and the switching valve has an inlet for introducing water pressurized by the cleaning pump, Multiple outlets that lead out the water to multiple cleaning nozzles, a water passage that connects the inlets to the outlets, and a reciprocating motion between the inlets and the outlets in the water passages to intermittently close the outlets while rotating intermittently. And a first and second cam mechanism for rotating the closing member in one direction by a predetermined angle in conjunction with the reciprocating motion of the closing member. The closing member is provided with a disk having a notch and a flat part, and the sliding surface inclined on the upper surface is on the same circumference. To form the first cam mechanism and add it with the washing pump. When the closing member rises due to the hydropower of the generated water, the sliding surface rises while sliding with a part of the outlet, and when the sliding surface slides completely, the flat end of the closing member opens the outlet. When the closing member is closed in a watertight manner, the closing member is lowered while performing a rotational motion by the second cam mechanism.

  As a result, the switching valve can be operated without providing a new drive source, and water can be selectively injected from a plurality of cleaning nozzles with a single cleaning pump, increasing costs and increasing the size of the entire device. Without reducing noise and water. A plurality of outlets can be watertightly closed by the disk of the closing member.

  As described above, according to the present invention, the closing member is reciprocated by intermittent operation of the pump, and the reciprocating motion is rotated by a predetermined angle by the cam mechanism provided on the closing member. By providing a valve, water can be selectively injected from a plurality of cleaning nozzles with a single cleaning pump, and noise reduction and water saving can be realized without increasing costs and increasing the size of the entire device. . Further, the plurality of outlets can be water-tightly closed by the disk of the closing member.

Sectional drawing of the switching valve of the dishwasher of one Example of this invention Cross section of the dishwasher Side sectional view of the dishwasher (A) Side view of the closing member of the switching valve of the dishwasher (b) Upper perspective view of the closing member of the switching valve of the dishwasher (c) Lower perspective view of the closing member of the switching valve of the dishwasher (A) AA line sectional view of the dishwasher (b) BB line sectional view of the dishwasher (c) CC line sectional view of the dishwasher (d) The dishwasher DD sectional view The top view of the state which the closing member and opening surface of the dishwasher contact | abutted The perspective view of the sliding surface which comprises the cam mechanism of the same dishwasher (A) Upper perspective view of the closing member to which the weight member of the dishwasher is fixed (b) Lower perspective view of the closing member to which the weight member of the dishwasher is fixed Cross-sectional view of a conventional dishwasher Side sectional view of a conventional dishwasher

The invention according to claim 1 of the present invention has a switching valve in the middle of a water channel connecting a cleaning pump and a plurality of cleaning nozzles, and the switching valve is an inlet for introducing water pressurized by the cleaning pump. And a plurality of outlets for leading the introduced water to a plurality of cleaning nozzles, a water passing part connecting the inlets and the outlets, and a reciprocating motion between the inlets and the outlets in the water passing part. A closing member that sequentially closes the outlet while rotating, and first and second cam mechanisms that rotate the closing member in a direction by a predetermined angle in conjunction with the reciprocating motion of the closing member, The closing member is generated by alternately acting a hydraulic force of water pressurized by the washing pump and an external force in the opposite direction to the hydraulic force, and the closing member includes a disk having the notch and a flat portion. Equipped with the same sliding surface on the top The first cam mechanism is formed on the circumference, and when the closing member is raised by the hydraulic force of water pressurized by the washing pump, the sliding surface slides with a part of the outlet. When the sliding surface is fully slid, the flat end of the closing member closes the outlet in a watertight manner, and when the closing member is lowered, the closing member is rotated by the second cam mechanism. It moves down while exercising, and by using a cleaning pump as the drive source of the switching valve, the switching valve can be operated without newly providing a driving source, and a plurality of cleaning nozzles can be operated with one cleaning pump. Thus, water can be selectively ejected, and low noise and water saving can be achieved without increasing costs and increasing the size of the entire device. Further, the plurality of outlets can be water-tightly closed by the disk of the closing member.

  According to a second aspect of the present invention, in the first aspect of the present invention, the external force opposite to the hydraulic force of the water pressurized by the washing pump is mainly gravity, and the switching valve is provided as a washing pump. Can be operated only by the hydropower generated by the earth and the gravity of the earth, and a switching valve with a very low running cost can be realized without requiring any new driving source.

  The invention according to claim 3 is the invention according to claim 2, wherein the weight member has a shape that corrects the center of gravity of the closing member to substantially the center, and stabilizes the movement of the closing member when it is lowered. Thus, the stability and reliability of the operation of the switching valve can be further improved.

  The invention according to claim 4 is the invention according to claim 2, wherein the closing member is made of a resin molding material including a metal weight member and reliably prevents the weight member from falling off. Thus, the weight member can be reliably prevented from rusting, and the weight member can be prevented from adhering foreign substances such as food contained in the water being washed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the thing of the same structure as a prior art example attaches | subjects the same code, and abbreviate | omits description.

  As shown in FIGS. 2 and 3, the washing tub 4 is provided inside the dishwasher main body 2, and the water storage section 5 for storing the supplied water is provided inside the washing tub 4. The water reservoir 5 is provided with a hot water heater 7 to heat the water stored in the water reservoir 5.

  Inside the cleaning tank 4, a cleaning nozzle 14 is provided on the left side, a cleaning nozzle 15 is provided on the right side, a cleaning nozzle 16 is provided on the back side, and a switching valve 17 is provided between the cleaning nozzles 14-16 and the cleaning pump 8. In addition, the water pressurized by the cleaning pump 8 is sequentially switched so as to pass through any one or two of the cleaning nozzles 14 to 16.

  The switching valve 17 is configured as shown in FIG. 1, and the water flow section 18 leads the inlet 19 for introducing water pressurized by the washing pump 8 and the introduced water to the washing nozzles 14 to 16, respectively. The outlets 20a to 20d (see FIG. 5 for details) are connected. A closing member 21 that reciprocates between the inlet 19 and the outlets 20a to 20d and sequentially closes the outlets 20a to 20d while rotating intermittently is provided inside the water flow portion 18. In conjunction with the reciprocating motion of the closing member 21, the closing member 21 is provided with first and second cam mechanisms 22 and 23 that act to rotate a predetermined angle in one direction.

  The closing member 21 is configured as shown in FIGS. 4A to 4C and mainly includes a disk 26 having a notch 24 and a flat portion 25. The sliding surfaces 27 a and 27 b are provided on the upper surface of the disk 26 and constitute the first cam mechanism 22. The sliding surfaces 27 a and 27 b have an inclination and are connected on the same circumference with the approximate center of the disk 26 as an axis. The sliding surface 28 constitutes the second cam mechanism 23 on the lower surface of the disk 26, has an inclination, and continues on the same circumference with the approximate center of the disk 26 as an axis. The guide hole 29 is provided substantially at the center of the disk 26.

  5 shows a cross section indicated in FIG. 1, FIG. 5 (a) is a cross section taken along line AA in FIG. 1, FIG. 5 (b) is a cross section taken along line BB in FIG. 1, and FIG. Is a cross section taken along the line CC of FIG. 1, and FIG. 5D is a cross section taken along the line DD of FIG.

  As shown in FIG. 5A, the outlet for leading water to the washing nozzles 14 to 16 is composed of four outlets 20a to 20d. The outlet 20a leads the water to the washing nozzle 14 on the left side, and the outlet 20c is on the right side. Water is led out to the washing nozzle 15, the outlet 20 d leads water to the washing nozzle 16 on the back side, and the outlet 20 b leads water to both the washing nozzles 14 and 15.

  The outlets 20a to 20d have an opening surface 30 on the same flat surface, and face the flat portion 25 on the closing member 21, and the hole diameter D1 of the opening surface 30 is set smaller than the outer diameter D2 of the flat portion 25. is doing. When the closing member 21 reciprocates between the inlet 19 and the outlets 20a to 20d, the flat portion 25 comes into contact with the opening surface 30 in a watertight manner, and the outlets 20a to 20a coincide with the positions of the notches 24 on the closing member 21. Any one of 20d becomes an outlet for deriving water to the cleaning nozzle, and the remaining three outlets 20a to 20d are blocked.

  FIG. 6 is an example showing a state in which the flat portion 25 of the closing member 21 is in contact with the opening surface 30. In this case, the outlets 20a, 20c, and 20d are closed, and only the outlet 20b is opened as an outlet. However, the water is led to both the washing nozzles 14 and 15.

  If the movement when the closing member 21 moves upward is the forward path, and the movement when moving downward is the backward path, the flat portion 25 of the blocking member 21 contacts the opening surface 30 at the end of the forward path. At the end, the flat portion 25 of the closing member 21 has a predetermined gap from the opening surface 30. When the forward path and the backward path are moved once each, the reciprocating motion is performed once. During this time, the closing member 21 is centered on the central axis 31 of the guide hole 29 by the first and second cam mechanisms 22, 23. Of the outlets 20a to 20d, it is set to rotate by an angle formed by two adjacent outlets.

  Therefore, when the closing member 21 descends from the state of FIG. 6 and moves to the end of the return path, and then the closing member 21 rises and moves to the end of the outward path, the closing member 21 is formed by an angle formed by the outlet 20b and the outlet 20c. , The outlets 20a, 20b, and 20d are blocked, only the outlet 20c is opened as an outlet, and water is led out to the right washing nozzle 15.

  The reciprocating motion of the closing member 21 is mainly performed by the hydraulic force of water pressurized by the cleaning pump 8 and the gravity acting on the closing member 21 itself. Although gravity always acts on the closing member 21, the hydraulic force generated by the cleaning pump 8 is much larger than the gravity acting on the closing member 21, so that the time when the closing member 21 is subjected to hydraulic force almost ignores the effect of gravity. be able to. Therefore, the closing member 21 reciprocates by alternately operating and stopping the cleaning pump 8.

In this way, the closing member 21 rotates a predetermined angle around the central axis 31 of the guide hole 29 while reciprocating between the inlet 19 and the outlets 20a to 20d, so that the outlets 20a to 20d are sequentially three at a time. As a result, the outlets 20a to 20d are sequentially opened. For example, when the rotation direction of the closing member 21 is the direction shown in FIG. 6, the openings are opened in the order of 20a → 20b → 20c → 20d → 20a, and accordingly, the cleaning nozzle 14 → both cleaning nozzles 14 and 15 → cleaning. Water is sequentially led out from nozzle 15 to cleaning nozzle 16 to cleaning nozzle 14. Here, it is assumed that the outlet 20b is connected to both the cleaning nozzles 14 and 15.

  Next, the first cam mechanism 22 will be described. The sliding surface 27a of the closing member 21 is in sliding contact with the rib 32 which is a part of the opening surface 30 constituting the outlets 20a to 20d, and constitutes the first cam mechanism 22 to convert linear motion into rotational motion. ing. The ribs 32 extend radially from the approximate center of the opening surface 30 at substantially equal intervals.

  The closing member 21 is set at the lowered position, that is, at the end of the return path, so that the sliding surface 27a and the rib 32 overlap each other when viewed from above, and the closing member 21 is pressurized by the cleaning pump 8. When the water rises due to the hydropower of the water, the sliding surface 27a and the rib 32 come into contact.

  Due to the hydraulic force, the closing member 21 receives a force upward even after contact, but for this reason, slipping occurs due to the inclination of the sliding surface 27a, and it rises while performing a rotational motion. When the rib 32 completely slides on the sliding surface 27a, the rib 32 comes into contact with the flat portion 25 of the closing member 21, and the rising and rotating motion of the closing member 21 are stopped simultaneously. At this time, all the plurality of ribs 32 abut against the flat portion 25 of the closing member 21 without a gap, and the outlet 20 closed by the disk 26 of the closing member 21 is watertight. In addition, if it sets so that the sliding surface 27b and the rib 32 may slidably contact, the rotation direction of the closure member 21 will be reverse.

  Next, the second cam mechanism 23 will be described. FIG. 7 is a perspective view of a sliding surface 33 that forms a pair with the sliding surface 28 of the closing member 21 and constitutes the second cam mechanism 23. The sliding surface 33 has an inclination and continues on the same circumference with the central axis 31 as an axis. A shaft 34 that fits into the guide hole 29 of the closing member 21 is provided at the center of the sliding surface 33.

  The second cam mechanism 23 performs the same operation as the first cam mechanism 22, and the linear motion is converted into a rotational motion by the sliding surface 28 of the closing member 21 being in sliding contact with the sliding surface 33. . That is, at the position where the closing member 21 is raised, that is, at the end of the forward path, the sliding surface 28 and the sliding surface 33 are set so as to overlap each other when viewed in plan from below. 8 When it is lowered by gravity in a state where it does not receive the hydraulic power at the time of stopping, the sliding surface 28 and the sliding surface 33 come into contact with each other. Due to the gravity, the closing member 21 receives a downward force even after the contact, but for this reason, slipping occurs due to the inclination of the sliding surface 28, and the sliding member 21 descends while performing a rotational motion.

  When the sliding surface 33 completely slides on the sliding surface 28, the lowering and rotating motions of the closing member 21 are stopped simultaneously. At this time, the flat portion 25 of the closing member 21 and the outlet 20 are kept stationary while maintaining a predetermined interval. Then, when the flat member 21 next rises due to hydraulic power, the notch 24 of the closing member 21 is adjacent to an outlet other than the outlets 20a to 20d previously opened, for example, next to the outlet 20a. It coincides with the outlet 20b.

  Here, the reciprocating motion of the closing member 21 will be described in more detail. FIG. 8A is a perspective view showing a state in which the weight member 35 is fixed to the closing member 21, and FIG. 8B is a plan view thereof. A claw 36 is provided on the surface of the disk 26 constituting the closing member 21 close to the inlet 19 side of the water passage 18, and a weight member 35 made of a sheet metal material is fixed to the claw 36 to be fixed. As shown in FIG. 8B, the weight member 35 is shaped so that its center of gravity approaches the notch 24 side of the disk 26, and the center of gravity of the closing member 24 and the weight member 35 is the center. Consideration is given to the vicinity of the shaft 31.

  Among the reciprocating motions of the closing member 21, especially the movement at the time of lowering is performed by gravity, the lowering is faster as the weight of the entire closing member 21 is larger. The time required for the reciprocating motion itself can be shortened. If the thickness of the weight member 35 made of sheet metal material or a plurality of the weight members 35 are stacked, the time required for one reciprocating motion can be adjusted.

  Since the closing member 21 has the notch 24 in the disk 26, the center of gravity of the closing member 21 is separated from the central axis 31 and is biased. Since the closing member 21 reciprocates by guiding the fitting between the guide hole 29 and the shaft 34 in the water passage 18, if the center of gravity of the closing member 21 is biased, the closing member 21 remains inclined. The reciprocating motion occurs, and the sliding surface 27a and the rib 32, or the sliding surface 28 and the sliding surface 33 do not mesh well, and the first and second cam mechanisms 22 and 23 may not function normally.

  That is, if the reciprocating motion is performed while the closing member 21 is tilted, the first and second cam mechanisms 22 and 23 do not function well, the linear motion is not converted into the rotational motion, and the outlets 20a to 20d are sequentially closed. The operation as a switching valve becomes unstable. Further, if the reciprocating motion is performed while the closing member 21 is tilted, the contact between the guide hole 29 and the shaft 34 becomes non-uniform, and the wear may be remarkably promoted locally.

  Therefore, by using the weight member 35 and correcting the center of gravity of the entire closing member 21 so as to be near the central axis 31, the inclination of the closing member 21 during the reciprocating motion is reduced as much as possible. The two cam mechanisms 22 and 23 always function normally. That is, the rectilinear movement of the closing member 21 is always accurately converted into a rotational movement, and the outlets 20a to 20d are sequentially closed, and the operation as the switching valve 17 becomes extremely stable. Further, by fixing the weight member 21, the weight of the entire closing member 21 is increased, and the specific gravity with respect to water is increased, so that the effect of making it difficult to receive the resistance of water at the time of lowering occurs. Switching operation is stable.

  In FIG. 8, the weight member 35 is locked and fixed by the claw 36, but it is not always necessary to fix it by this method. For example, as shown in FIGS. 3 to 6, a method of fixing the weight member 35 by deforming the resin protrusion provided on the closing member 21 with heat may be used. Moreover, the method of fixing using a screw, the method of fixing with a C-shaped retaining ring or E-shaped retaining ring, the method of fixing with a split pin, etc. may be used.

  Further, as a method of increasing the weight of the closing member 21, the closing member 21 may be made of a resin molding material, and a weight member having a large specific gravity such as metal may be included in the closing member 21. In this case, there is no fear that the weight member falls off during the switching operation of the closing member 21, the weight member can be easily rusted, and a low-cost metal material can be used.

  Further, when the weight member 35 is fixed to the outside of the closing member 21, a projection such as a claw 36 is required, and there is a possibility that foreign matters such as food contained in the water being cleaned may adhere to this portion. By including 35, such adhesion does not occur.

  In order to increase the weight of the closing member 21, the closing member 21 may be made of a metal forming material. In this case, the specific gravity of the closing member 21 with respect to water becomes extremely large, and the weight increases with a small volume, so that the movement of the closing member 21 when it is lowered is further stabilized. Since the specific gravity is large, the closing member 21 can be reduced in size, which can reduce the size of the switching valve 17 and the entire device.

  In addition, as another method having the same effect as the case where the closing member 21 is formed of a metal molding material, there are a method of molding with a resin material to which a metal piece is added, a method of molding with ceramics, and the like.

  Providing the weight member 21 on the surface of the disk 26 constituting the closing member 21 on the inlet 19 side of the water passage portion 18 is effective in stabilizing the movement of the closing member 21. In order to facilitate processing, assuming that the closing member 21 is made of a resin molding material and the weight member 35 is made of a sheet metal material, it is more stable in a free-falling motion due to gravity when a heavy one is provided on the lower side. This is because it is normal to show movement.

  Moreover, it is difficult to contact the weight member 35 with the opening surfaces 30 of the outlets 20a to 20d while maintaining high water tightness, and the weight member 35 is provided on the surface of the disk 26 on the side of the inlet 19 in the water flow portion 18. Therefore, it becomes easy to realize a structure that can easily maintain water tightness.

  Although the closing member 21 is raised by hydraulic power, since the water supply capacity of the cleaning pump 8 is generally very large, the closing member 21 vigorously abuts or collides with the opening surface 30 constituting the outlets 20a to 20b. Therefore, if the weight member 35 is used in the colliding portion, the collision sound becomes louder in terms of hearing. Therefore, the weight member 21 and the opening can be formed by providing the weight member 35 on the surface of the disk 26 on the inlet 19 side of the water passage portion 18. It is possible to prevent a collision sound that is generated at the time of contact with the surface 30.

  Next, the overall operation in the above configuration will be described. When the tableware is placed in the tableware basket 10 and accommodated in the washing tub 4 and the operation is started, the water supply valve 3 is opened and water is supplied to the washing tub 4 through the water supply path 1. The supplied water is stored in the water storage unit 5 in the cleaning tank 4, and when a predetermined water level is detected by the water level sensor 6, the water supply valve 3 is closed to stop the water supply, and the cleaning pump 8 is driven.

  Thereby, the water stored in the water storage unit 5 is pressurized by the cleaning pump 8, passes through the switching valve 17, is sprayed from the cleaning nozzles 14 to 16 toward the tableware in the tableware basket 10, and returns to the water storage unit 5. Cycle through the path. At this time, the cleaning pump 8 operates intermittently. For example, the operation is repeated for 25 seconds and then 5 seconds. By the operation of the washing pump 8 performed intermittently, the closing member 21 constituting the switching valve 17 is intermittently subjected to hydraulic power so as to move up and down, that is, reciprocate together with the influence of gravity. Become.

  This reciprocating motion is converted into rotational motion by the first and second cam mechanisms 22, 23 constituting the switching valve 17, and the closing member 21 rotates by a predetermined angle every time it reciprocates and is sent from the cleaning pump 8. The generated water is sequentially led to the outlets 20a to 20d. Thereby, water is sequentially ejected from the cleaning nozzles 14-16. For example, if the cleaning operation is performed for a total of 30 minutes, the switching valve 17 performs the switching operation 60 times when the cleaning pump 8 is operated repeatedly for 25 seconds and then for 5 seconds. Since there are a total of four outlets 20a to 20d of the switching valve 17, by setting the number of switching operations of the switching valve 17 to a multiple of 4 as in the above 60 times, the entire tableware placed in the tableware basket 10 is provided. Water can be sprayed uniformly.

  While water is circulated by the washing pump 8, it is heated by the hot water heater 7 to be heated. When the washing is finished, the water in the washing tub 4 is discharged by the drain pump 11 and the washing process is finished.

  As described above, according to this embodiment, the number of cleaning pumps remains one, and water is sequentially injected from the cleaning nozzles 14 to 16 by the switching valve 17 having a simple structure that does not require another drive source. It doesn't lead to an increase in the size of the entire device. Further, since the switching valve 17 itself does not require a special drive source and the washing pump 8 is only operated intermittently, it can be realized at low cost, and high reliability and durability can be obtained.

  Further, the noise during operation is largely attributed to the noise that the water sprayed from the cleaning nozzles 14 to 16 hits the cleaning tank 4, so the smaller the amount of water sprayed at the same time, the quieter it is. According to this, as compared with the case where jets are simultaneously ejected from all the cleaning nozzles, the amount of water jetted simultaneously can be reduced since the jets are sequentially ejected from the respective wash nozzles, and low noise can be realized.

  In addition, the water saving is water saving because the smaller the amount of circulating water can reduce the amount of water stored in the water storage section 5, but according to the present embodiment, compared with the case where the water is injected from all the washing nozzles at the same time. Since the water is sequentially ejected from each cleaning nozzle, the amount of circulating water can be reduced and water can be saved.

  In addition, according to the present embodiment, the water supply capacity of the cleaning pump 8 can be reduced by the amount of the circulated water, and the cost of the cleaning pump 8 and the size of the cleaning pump 8 can be reduced. Thereby, the whole apparatus can be reduced in size.

DESCRIPTION OF SYMBOLS 8 Washing pump 14 Washing nozzle 15 Washing nozzle 16 Washing nozzle 17 Switching valve 18 Water flow part 19 Inlet 20 Outlet 21 Closure member 22 1st cam mechanism 23 2nd cam mechanism

Claims (4)

Having a switching valve in the middle of the water channel connecting the cleaning pump and the plurality of cleaning nozzles,
The switching valve includes an inlet for introducing water pressurized by the washing pump, a plurality of outlets for leading the introduced water to a plurality of washing nozzles, a water passage portion connecting the inlet and the outlet, and the water passage A closing member that reciprocally moves between the inlet and the outlet in the section and intermittently closes the outlet while rotating intermittently, and rotates the blocking member by a predetermined angle in one direction in conjunction with the reciprocating motion of the closing member. A first cam mechanism and a second cam mechanism
The reciprocating motion is caused by the hydropower of the water pressurized by the washing pump and the external force acting in the opposite direction on the hydropower alternately.
The closing member includes a disk having the notch and a flat portion, and forms a first cam mechanism by forming a sliding surface inclined on the upper surface on the same circumference,
When the closing member rises due to the hydraulic force of water pressurized by the washing pump, the sliding surface rises while performing rotational motion by sliding with a part of the outlet, and the sliding surface When it slides, the flat end of the closing member closes the outlet in a watertight manner,
A dishwasher in which, when the closing member is lowered, the closing member is lowered while being rotated by the second cam mechanism. The dishwasher according to claim 1, wherein the external force opposite to the hydraulic force of the water pressurized by the washing pump is mainly gravity. 3. The dishwasher according to claim 2, wherein the weight member has a shape that corrects the center of gravity of the closing member to substantially the center. 3. The dishwasher according to claim 2, wherein the closing member is made of a resin molding material including a metal weight member.

Images