KR100574129B1 - Dish washer - Google Patents

Abstract

In the middle of the channel connecting the washing pump and the plurality of washing nozzles, the switching valve 17 has a inlet 19 for introducing water pressurized by the washing pump and a plurality of washing the introduced water. A plurality of outlets 20 leading to the nozzle, a water passage 18 connecting the inlet 19 and the outlet 20, and the outlet 20 are sequentially closed while intermittently rotating in the water passage 18. The closing member 21 is provided. The closing member 21 reciprocates between the inlet 19 and the outlet 20. The cam mechanism 22, 23 which rotates a predetermined angle in one direction linked with this reciprocation motion is provided, and the reciprocation motion is the hydraulic power which the water which the closing member 21 pressurized with the washing | cleaning pump, and the external force which is opposite to this hydraulic power This occurs by alternating action.

Description

Dish Washer {DISH WASHER}             

1 is a cross-sectional view of the switching valve of the dishwasher of one embodiment of the present invention,

2 is a cross-sectional view of the dishwasher of one embodiment of the present invention;

3 is a side cross-sectional view of the dishwasher of one embodiment of the present invention;

Figure 4a is a side view of the closing member of the switching valve of the dishwasher of one embodiment of the present invention,

4B is an upward perspective view of the closing member of the switching valve of the dishwasher of the embodiment of the present invention;

4C is a bottom perspective view of the closing member of the switching valve of the dishwasher of one embodiment of the present invention;

5A is a cross-sectional view taken along the line A-A of the dishwasher of the embodiment of the present invention;

5B is a cross-sectional view taken along the line B-B of the dishwasher of the embodiment of the present invention;

5C is a cross-sectional view taken along the line C-C of the dishwasher of the embodiment of the present invention;

5D is a cross-sectional view taken along the line D-D of the dishwasher of the embodiment of the present invention;

6 is a plan view of a state in which the closing member and the opening surface of the dishwasher according to one embodiment of the present invention contact;

7 is a perspective view of a sliding surface constituting the cam mechanism of the dish washing machine of one embodiment of the present invention;

8A is an upward perspective view of a closing member to which a weight member of a dish washing machine of one embodiment of the present invention is fixed;

8B is a bottom perspective view of the closing member to which the weight member of the dish washing machine of the embodiment of the present invention is fixed;

9 is a cross-sectional view of a conventional dishwasher,

10 is a side cross-sectional view of a conventional dishwasher.

<Description of the code | symbol about the principal part of drawing>

2: dishwasher body 4: washing tank

5: water storage part 7: heater

14, 15, 16: cleaning nozzle 17: switching valve

21: closing member 22, 23: cap mechanism

31: central axis 35: weight member

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dish washer that performs washing of dishes by spraying water pressurized with a cleaning pump from a plurality of cleaning nozzles.

Conventionally, this kind of dishwasher is comprised as shown in FIG.9 and FIG.10. A conventional example will be described below with reference to the drawings.

The water supply path 1 supplies tap water to the dishwasher main body 2. The feed water is controlled by the feed valve 3. The washing tank 4 provided in the inside of the dishwasher main body 2 is equipped with the water storage part 5 which stores the water supplied in the inside. The water level sensor 6 is provided in communication with the reservoir 5.

The water stored in the reservoir 5 is heated by the heater 7 provided in the reservoir 5 and pressurized by the washing pump 8. Pressurized water is sprayed toward the dishes in the dish basket 10 from the washing nozzles 9 provided in plural numbers to wash the dishes. The drain pump 11 discharges the water in the washing tank 4.

The dishwasher main body 2 is equipped with the front door 12 which can be opened and closed, and is comprised so that the dish basket 10 can be taken in and out. The food waste filter 13 captures food waste that has been attached to the tableware.

The operation in the above configuration will be described. When the dishes are placed in the dish basket 10 to be accommodated in the washing tank 4 and the operation is started, the water supply valve 3 is opened and water is supplied to the washing tank 4 through the water supply path 1. The water supplied is stored in the reservoir 5 of the washing tank 4. When the water level sensor 6 detects the predetermined water level, the water supply valve 3 is closed, the water supply is finished, and the cleaning pump 8 is driven.

The water stored in the reservoir 5 is heated by the heater 7 and pressurized by the washing pump 8. Pressurized water is sprayed from the washing nozzle 9 toward the tableware of the dish basket 10 to wash the dishes. When the washing is finished, the water in the washing tank 4 is discharged by the drain pump 11.

Further, in Japanese Patent Laid-Open No. 1993-176875, the basic configuration is the same as that of the conventional example, and low noise during operation is provided by installing washing pumps corresponding to the respective cleaning nozzles and selectively spraying water from the cleaning nozzles. A configuration is shown that allows for anger and saving water.

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

In addition, in the configuration in which the number of cleaning pumps corresponding to each cleaning nozzle is provided and water is selectively sprayed from the cleaning nozzle, noise reduction and water saving are possible, but providing a plurality of cleaning pumps leads to an increase in cost. There is a problem that the whole apparatus becomes larger.

This invention considers the said conventional subject.

The dishwasher of this invention is equipped with the washing pump, the some washing nozzle, and the switching valve arrange | positioned in the middle of the channel which connects a washing pump and some washing nozzle. The switching valve includes an inlet for introducing water pressurized by the washing pump, a plurality of outlets for introducing the introduced water to the plurality of washing nozzles, a water passage connecting the inlet and the outlet, and the plurality of outlets sequentially. It is provided with a closing member for closing. That is, it is the structure which guides the water pressurized by the washing | cleaning pump to a some washing nozzle sequentially by a switching valve.

EMBODIMENT OF THE INVENTION Hereinafter, one Example of this invention is described, referring drawings. In addition, the thing of the same structure as a conventional example attaches | subjects the same code | symbol, and abbreviate | omits description.

As shown in FIG.2 and FIG.3, the washing tank 4 is installed in the inside of the dishwasher main body 2. As shown in FIG. The washing tank 4 has a water storage part 5 for storing water supplied therein. The heater 7 provided in this water storage part 5 heats the water stored in the water storage part 5.

Inside the cleaning tank 4, a cleaning nozzle 14 is provided on the left side, a cleaning nozzle 15 on the right side, and a cleaning nozzle 16 on the back side. A switching valve 17 is provided between the cleaning nozzles 14 to 16 and the cleaning pump 8. The switching valve 17 sequentially switches the water pressurized by the washing pump 8 to pass through to any one or two of the washing nozzles 14 to 16.

The switching valve 17 is comprised as shown in FIG. The water passage portion 18 includes an inlet 19 for introducing water pressurized by the washing pump 8 and an outlet 20a to 20d for respectively introducing the introduced water to the washing nozzles 14 to 16 (in detail, FIG. 5a). Inside the water passage 18, a closing member 21 is provided which reciprocates between the inlet 19 and the outlets 20a to 20d, and closes the outlets 20a to 20d sequentially while intermittently rotating. In conjunction with the reciprocating motion of the closing member 21, cam mechanisms 22, 23 that rotate at a predetermined angle in one direction are provided in the closing member 21.

A predetermined gap is formed between the outer circumference of the closing member 21 and the inner circumference of the water passage portion 18 so that food contained in the water passing through the water passage portion 18 passes between the closing member 21 and the water passage portion 18. It is installed.

The inlet 19 opens in a direction substantially perpendicular to the reciprocating motion of the closing member 21 so that the water flow contacts the cam mechanism 23 from the transverse direction. By such a configuration, it is possible to prevent foreign substances such as food and the like from clogging or depositing on the cam mechanism 23.

4A is a side view of the closure member, FIG. 4B is an upward perspective view of the closure member, and FIG. 4C is a bottom perspective view of the closure member.

The closure member 21 consists of the disk 26 which has the notch 24 and the flat part 25. As shown in FIG. The sliding surface 27a, 27b is provided in the upper surface of the disk 26, and comprises the cam mechanism 22. As shown in FIG. The sliding surfaces 27a and 27b are inclined and are continuous on the same circumference around the center of the disk 26. In addition, the some sliding surface 28 comprises the cam mechanism 23 below the disk 26. The sliding surface 28 is inclined and continuous on the same circumference with an axis about the center of the disk 26. The guide hole 29 is provided in the substantially center of the disk 26.

5A to 5D show a cross section of the switching valve, FIG. 5A is a cross section taken along line AA of FIG. 1, FIG. 5B is a cross section taken along line BB of FIG. 1, FIG. 5C is a cross section taken along line CC of FIG. 1, and FIG. 5D is shown on FIG. 1. DD line cross section is shown.

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

The outlets 20a to 20d have an open face 30 on the same flat surface. The outlets 20a-20d oppose the flat portion 25 on the closure member 21. The hole diameter D1 of the opening surface 30 is smaller than the outer diameter D2 of the flat portion 25. When the closing member 21 reciprocates between the inlet 19 and the outlets 20a to 20d, the flat portion 25 is in watertight contact with the opening surface 30. At this time, any one of the outlets 20a to 20d coinciding with the position of the cutout 24 on the closing member 21 serves as an outlet for directing water to the cleaning nozzle, and among the remaining outlets 20a to 20d. Three are closed.

FIG. 6: is an example which shows the state which the flat part 25 of the closing member 21 contacted the opening surface 30. As shown in FIG. In this case, the outlets 20a, 20c, and 20d are closed, only the outlet 20b is opened, and water is led to both of the cleaning nozzles 14 and 15.

The movement when the closing member 21 moves upward is called a backward path, and the movement when it moves downward is called a return path. The flat portion 25 of the closing member 21 is in contact with the opening surface 30 at the end portion of the return path, but the flat portion 25 of the closing member 21 is the opening surface 30 at the termination portion of the return path. And has a predetermined gap. Between the one reciprocating motions, by the cam mechanisms 22 and 23, the closing member 21 is centered around the central axis 31 of the guide hole 29, and two neighboring outlets of the outlets 20a to 20d are provided. Is set to rotate by the angle it creates.

Therefore, from the state shown in FIG. 6, when the closing member 21 descend | falls and moves to the end part of a return path, and then the closing member 21 raises and moves to the end part of a return path | route, the exit 20b and the exit 20c The closing member 21 is rotated by the angle formed by. The outlets 20a, 20b, and 20d are closed, only the outlet 20c is opened as the outlet, and water is led to the cleaning nozzle 15 on the right side.

In addition, the reciprocating motion of the closing member 21 is mainly performed by the hydraulic power which the water pressurized by the washing | cleaning pump 8 has, and the gravity acting on the closing member 21 itself. Gravity acts on the normally closed member 21, but since the hydraulic power generated by the cleaning pump 8 is much larger than the gravity acting on the closing member 21, the gravity of the closing member 21 during the hydraulic power is reduced. Can be almost ignored. Accordingly, the closing member 21 reciprocates by alternately executing the operation and the stop of the cleaning pump 8.

In this way, the closing member 21 rotates a predetermined angle about 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 closed three at a time, and one of the outlets 20a to 20d opens sequentially. For example, when the rotation direction of the closing member 21 is a direction as shown in FIG. 6, the outlet is opened in the order of 20a → 20b → 20c → 20d → 20a, and with this, the cleaning nozzle 14 → washing Water is drawn out sequentially from the bidirectional to the nozzles 14 and 15 to the cleaning nozzle 15 to the cleaning nozzle 16 to the cleaning nozzle 14. Here, it is assumed that the outlet 20b is connected to both directions of the cleaning nozzles 14 and 15.

Next, the cam mechanism 22 is demonstrated. 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 cam mechanism 22, thereby performing linear motion. Converting to rotational motion. The rib 32 extends radially at approximately equal intervals from the approximately center of the opening surface 30.

The closing member 21 is set to be in a position where the sliding surface 27a and the rib 32 overlap with each other in the lowered position, that is, in the terminal end portion of the return path. Then, when the closing member 21 is lifted up by the hydraulic power of the water pressurized by the cleaning pump 8, the sliding surface 27a and the rib 32 contact each other.

The closing member 21 is forced upward by hydraulic power even after contact. For this reason, a slide generate | occur | produces by the inclination of the sliding motion surface 27a, and it raises, making a rotary motion. When the rib 32 slides the sliding surface 27a, the rib 32 contacts the flat portion 25 of the closing member 21, and the lifting and rotating movement of the closing member 21 stops at the same time. At this time, all of the plurality of ribs 32 contact the flat portion 25 of the closing member 21 without a gap. In other words, the outlet 20 closed by the disc 26 of the closing member 21 is watertight. In addition, when the sliding surface 27b and the rib 32 are set to be in sliding contact, the rotation direction of the closing member 21 is reversed.

Here, when the sliding surface 27a is formed in the spiral surface which makes the central axis 31 an axis, the rib 32 will be in linear contact with the sliding surface 27a, and the sliding movement will become smooth. That is, wear can be reduced. In addition, the self-cleaning effect prevents the accumulation of contamination and the engagement of foreign matter on the surface of the sliding surface 27a, so that the movement of the closing member 21 is smooth, and the durability and reliability are improved. Is advantageous.

Here, as shown in FIG. 6, the inlet 19 for guiding water into the water passage portion 18 opens in a direction deviated from the central axis 31 so that swirl flow occurs in the water passage portion 18. have. The direction of this swirl flow coincides with the rotational direction of the closing member 21 and acts to assist the closing member 21 in rotation by the cam mechanism 22. Therefore, the reliability of the rotation of the closing member 21 is improved, and the reliability of the operation as the switching valve 17 can be improved.

Next, the cam mechanism 23 will be described. FIG. 7: is a perspective view of the sliding surface 33 which pairs with the sliding surface 28 of the closing member 21, and comprises the cam mechanism 23. As shown in FIG. The sliding surface 33 has an inclination and is connected to the same circumference with the central axis 31 as an axis. Moreover, as a guide member which stabilizes the reciprocating motion of the closing member 21, the shaft 34 which engages with the guide hole 29 of the closing member 21 is provided in the center of the sliding surface 33. As shown in FIG. The cross section of the shaft 34 has a + shape, and by forming a large gap with the inner circumferential surface of the guide hole 29, foreign matters such as food and the like contained in the water passing through become difficult to be clogged. In this manner, the operation of the switching valve 17 can be improved by the action of the guide hole 29 and the shaft 34.

The cam mechanism 23 performs the same operation as the cam mechanism 22, and the sliding motion surface 28 of the closing member 21 is in sliding contact with the sliding motion surface 33, thereby converting the linear motion into rotational motion. have. That is, it is set so that the sliding member 28 and the sliding movement surface 33 may overlap in the position where the closing member 21 is raised, ie, the terminal part of a royal path, when viewed from below. When the closing member 21 descends by gravity in a state in which the closing pump 21 is not subjected to hydraulic power at the time of stopping the cleaning pump 8, the sliding surface 28 and the sliding surface 33 contact each other. By gravity, the closing member 21 receives the force downward even after contact, but the sliding member is generated by the inclination of the sliding surface 28, and descends while performing the rotational movement.

When the sliding surface 33 slides the sliding surface 28, the lowering and the rotational movement of the closing member 21 stop at the same time. At this time, the flat portion 25 and the outlet 20 of the closing member 21 maintain a predetermined interval and stop. And when the next flat member 21 rises by receiving hydraulic power, the outlet, for example, the outlet 20a which is separate from the exit 20a-20d in which the notch 24 of the closing member 21 was opened last time, for example. The next of coincides with the exit 20b adjacent to it.

Here, when the sliding surface 28 and the sliding surface 33 are formed in the spiral surface which makes the central axis 31 the axis, the sliding surface 28 will contact with the sliding surface 33 on the same surface. do. In other words, it becomes possible to smooth the sliding motion and reduce the wear. In addition, this also has the effect that it is difficult to deposit dirt or the like on the surfaces of the sliding surface 28 and the sliding surface 33, and is advantageous in smoothly performing the movement of the closing member 21.

Here, the reciprocating motion of the closing member 21 will also be described in detail. FIG. 8: A is a perspective view which shows the state which fixed the weight member 35 to the closing member 21, and FIG. 8B is the top view. A click 36 is provided on a surface of the disk 26 constituting the closing member 21 near the inlet 19 side of the water passage portion 18. The weight member 35 made of sheet metal material is fixed to the click 36. As shown in FIG. 8B, the shape of the weight member 35 is set close to the center of the cutout 24 side of the disk 26, and the closing member 24 and the weight member 35 are combined. The center is configured to be located near the central axis 31.

In particular, since the movement of the closing member 21 is performed by gravity, the closing member 21 descends quickly as the weight of the entire closing member 21 increases. Thereby, fall time is shortened and the time itself required for one reciprocation movement can be shortened. The time required for one reciprocating motion can be adjusted by making the weight member 35 which consists of sheet metal materials thick, or superimposing a plurality of members 35.

Since the closing member 21 has the cutout 24 in the disk 26, the center of the closing member 21 is inclined by generating a space | interval from the central axis 31. As shown in FIG. Since the closing member 21 reciprocates by the guide by the coupling of the guide hole 29 and the shaft 34 in the water passage 18, when the inclination occurs in the center of the closing member 21, The closing member 21 becomes a reciprocating motion in an inclined state. For this reason, the sliding surface 27a and the rib 32 or the sliding surface 28 and the sliding surface 33 do not mesh, and the cam mechanisms 22 and 23 may not function normally.

That is, when the reciprocating motion is performed while the closing member 21 is inclined, the cam mechanisms 22 and 23 do not function well, and the straight motion is not converted into the rotational motion. Further, the outlets 20a to 20d cannot be closed sequentially, and the operation as the switching valve becomes unstable. In addition, when the closing member 21 performs the reciprocating motion in the inclined state, the contact between the guide hole 29 and the shaft 34 becomes uneven, and wear may proceed remarkably locally.

Therefore, the inclination of the closing member 21 in the reciprocating motion is greatly reduced by correcting the center of the entire closing member 21 to be near the central axis 31 using the weight member 35. As a result, the cam mechanisms 22 and 23 always function normally. That is, the straight motion of the closing member 21 is always correctly converted to the rotational motion, thereby closing the outlets 20a to 20d sequentially, and the operation as the switching valve 17 is very stable. In addition, by fixing the weight member 21, the weight of the entire closure member 21 is increased, so that the specific gravity with respect to water is increased, thereby making it difficult to receive the resistance of the water during the fall. This also stabilizes the switching operation of the closing member 21.

In addition, although the weight member 35 is latched and fixed by the click 36 in FIG. 8A and FIG. 8B, it is not necessary to necessarily fix in this way. For example, as shown in FIGS. 3 to 6, the resin protrusions provided on the closing member 21 may be deformed by heat to fix the weight member 35. Moreover, the method of fixing using a screw, the method of fixing with a C type fixing ring, an E type fixing ring, etc., the method of fixing with a split pin, etc. may be sufficient.

In addition, as a method of increasing the weight of the closing member 21, the closing member 21 may be a resin molding material, and a large weight member having a specific gravity such as metal may be included in the closing member 21. In this case, there is no possibility that the weight member may fall off during the switching operation of the closing member 21, and the rust prevention of the weight member is also facilitated, and it becomes possible to use a low-cost metal material.

In addition, when the weight member 35 is fixed to the outside of the closing member 21, a protrusion such as the click 36 is required, and foreign matter such as food or the like contained in the water being cleaned may be attached to this portion. However, the inclusion of the weight member 35 prevents such attachment.

In addition, in order to increase the weight of the closure member 21, the closure member 21 can also be comprised from a metal molding material. In this case, the specific gravity with respect to the water of the closing member 21 becomes very large, and since weight increases by small volume, the movement at the time of the lowering of the closing member 21 becomes more stable. Since the specific gravity becomes large, the closing member 21 can be downsized, which can downsize the switching valve 17 and further downsize the entire apparatus.

Moreover, as another method which has the same effect as the case where the closure member 21 is comprised with the metal molding material, the method of shaping | molding with the resin material which added the metal piece, the method of shaping with ceramic, etc. are mentioned.

Providing the weight member 21 on the surface of the disk 26 constituting the closing member 21 on the side of the inlet portion 19 in the water passage portion 18 stabilizes the movement of the closing member 21. It works. 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 sheet metal material, it is more stable in the free fall motion caused by gravity to install a larger one below. This is because it is normal to indicate an operation.

In addition, it is difficult to bring the weight member 35 into contact with the opening surface 30 of the outlets 20a to 20d while maintaining high watertightness, and the weight member 35 is inlet in the water passage portion 18 of the disc 26. By providing it on the 19) side, it becomes easy to implement the structure which is easy to maintain water tightness.

In addition, although the closing member 21 is lifted up by hydraulic power, since the water supply capacity of the washing pump 8 is generally very large, the closing member 21 is connected to the opening surface 30 constituting the outlets 20a to 20b. Strongly contact, ie collide. Therefore, when the weight member 35 is used for this colliding portion, the collision sound becomes loud in hearing. However, by providing the weight member 35 on the surface on the side of the inlet 19 in the water passage portion 18 of the disk 26, a collision sound generated when the weight member 21 is in contact with the opening surface 30 is prevented. can do.

Next, the overall operation in the above configuration will be described. When the tableware is placed in the dish basket 10, accommodated in the washing tank 4, and operation starts, the water supply valve 3 is opened. Then, water is supplied to the washing tank 4 through the water supply path 1. The water supplied is stored in the water storage part 5 in the washing tank 4, and when the water level sensor 6 detects the predetermined water level, the water supply valve 3 is closed to terminate the water supply, and the washing pump 8 is closed. Drive.

As a result, the water stored in the water storage part 5 is pressurized by the washing pump 8, passes through the switching valve 17, and is sprayed from the washing nozzles 14 to 16 toward the dishes in the dish basket 10. It circulates in the path which returns to the water part 5. At this time, the cleaning pump 8 is intermittently operated. For example, operation is repeatedly performed in a situation of 5 seconds stop after 25 seconds of operation. By the operation of the washing pump 8 which is executed intermittently, the closing member 21 constituting the switching valve 17 receives hydraulic power intermittently, so that the influence of gravity is also raised and lowered, that is, the reciprocating motion. Will be done.

This reciprocating motion is converted into rotational motion by the cam mechanisms 22 and 23 constituting the switching valve 17. The closing member 21 is rotated by a predetermined angle every time it reciprocates once, and the water conveyed from the washing pump 8 is sequentially led to the outlets 20a to 20d. As a result, water is sequentially sprayed from the cleaning nozzles 14 to 16. For example, if the cleaning operation is performed for a total of 30 minutes, when the cleaning pump 8 is set to be repeated for 5 seconds after the 25 seconds of operation, the switching valve 17 executes the switching operation 60 times. Since the total number of outlets 20a to 20d of the selector valve 17 is four, the number of times of the changeover operation of the selector valve 17 is set to a multiple of four (generally, a multiple of the number of outlets) as in the above 60 times. Thereby, water can be sprayed uniformly to the whole tableware arrange | positioned at the tableware basket 10. FIG.

The water is circulated by the washing pump 8 and heated by the heater 7 to form hot water. When washing | cleaning is complete | finished, the water in the washing | cleaning tank 4 is discharged by the drain pump 11, and a washing | cleaning stroke is complete | finished.

As described above, according to the present embodiment, since the washing pump is any one, the switching valve 17 having a simple structure sequentially executes the spraying of water from the washing nozzles 14 to 16, and thus does not lead to an increase in cost. The whole device doesn't get big either. In addition, since the switching valve 17 itself does not require a special driving source and only drives the cleaning pump 8 intermittently, it can be realized at low cost, and high reliability and durability can also be obtained.

In addition, since the noise generated during operation is a major factor due to the sound of water sprayed from the cleaning nozzles 14 to 16 contacting the cleaning tank 4, the smaller the amount of the water sprayed at the same time is quieter. According to the present invention, the spraying is sequentially performed from each washing nozzle, compared with the spraying from all washing nozzles simultaneously, so that the amount of water sprayed at the same time can be reduced, and low noise can be realized.

In addition, although the amount of water circulating is smaller, the amount of water stored in the water storage part 5 can be reduced, but according to the present embodiment, the spraying is performed sequentially from each cleaning nozzle, compared to spraying simultaneously from all the cleaning nozzles. The spraying can be performed in such a way that the amount of circulating water can be reduced, resulting in saving water.

In addition, according to the present embodiment, as the amount of water circulated is reduced, the water supply capacity of the cleaning pump 8 can be reduced, thereby reducing the cost of the cleaning pump 8 and miniaturizing the cleaning pump 8. This makes it possible to miniaturize the whole apparatus.

By using the dishwasher according to the present invention, it is possible to save water and to reduce the overall size and to reduce the cost.

Claims (26)

In the dishwasher, Washing pump, A plurality of cleaning nozzles, A switching valve disposed in the middle of a channel connecting the cleaning pump and the plurality of cleaning nozzles, The changeover valve includes an inlet for introducing water pressurized by the washing pump, a plurality of outlets for introducing the introduced water to the plurality of washing nozzles, a water passage connecting the inlet and the plurality of outlets, A closure member for sequentially closing the plurality of outlets, The closure member reciprocates between the inlet and the plurality of outlets. Dishwasher. The method of claim 1, The closing member rotates intermittently in the water passage to sequentially close some of the plurality of outlets, and sequentially introduces the introduced water to the plurality of cleaning nozzles. Dishwasher. delete The method of claim 1, The reciprocating motion of the closing member is achieved by alternating action of the hydraulic power of the water pressurized by the cleaning pump and the external force in the opposite direction to the hydraulic power. Dishwasher. The method of claim 4, wherein The external force is gravity Dishwasher. The method of claim 5, wherein The weight member is configured in the closing member Dishwasher. The method of claim 6, The weight member configured in the closing member is disposed at the inlet side of the water passage. Dishwasher. The method of claim 6, The weight member corrects the center of the closure member at the center. Dishwasher. The method of claim 6, The weight member is shaped to straighten the center of the closure member in the center Dishwasher. The method of claim 6, The weight member is made of metal, The closing member is made of a resin molding containing the weight member. Dishwasher. The method of claim 1, The closure member is composed of a metal molding Dishwasher. The method of claim 1, The closing member closes some of the plurality of outlets by hydraulic power of water pressurized by the cleaning pump. Dishwasher. The method of claim 1, The closing member reciprocates between the inlet and the plurality of outlets by intermittently operating the cleaning pump. Dishwasher. The method of claim 1, The closure member includes a cam mechanism that rotates in an direction in association with the reciprocating motion and is angularly rotated between mutually neighboring outlets among the plurality of outlets. Dishwasher. The method of claim 14, The cam mechanism consists of a plurality of sliding motion surfaces continuous on the same circumference. Dishwasher. The method of claim 15, The plurality of sliding surfaces are formed in a spiral surface whose axis is the center of the sliding surfaces. Dishwasher. The method of claim 14, The cam mechanism configured in the closing member is disposed at the plurality of outlet sides Dishwasher. The method of claim 17, The cam mechanism rotates the angle in one direction in association with the movement of the reciprocating motion of the reciprocating motion Dishwasher. The method of claim 14, The cam mechanism constituted by the closure member is disposed on both the inlet side and the plurality of outlet sides. Dishwasher. The method of claim 19, The cam mechanism rotates the angularly in one direction in association with respective movements of the reciprocating motions into and out of the reciprocating motions. Dishwasher. The method of claim 14, Further comprising a guide member for guiding the reciprocating motion of the closure member Dishwasher. The method of claim 21, The guide member is composed of a hole and a shaft provided in the closing member and the water passage portion Dishwasher. The method of claim 22, The cross section of the shaft constituting the guide member is + -shaped Dishwasher. The method of claim 1, Having a gap between an outer circumference of the closure member and an inner circumference of the water passage Dishwasher. The method of claim 1, The inlet opening in a direction perpendicular to the reciprocating motion of the closure member. Dishwasher. The method of claim 1, The inlet is opened in the direction in which the swirl flow in the same direction as the rotational direction of the closure member occurs Dishwasher.

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