JP3918747B2 - Dishwasher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dishwasher that cleans dishes by spraying water pressurized by a washing pump from a plurality of washing nozzles.
[0002]
[Prior art]
Conventionally, this type of dishwasher has been configured as shown in FIGS. Hereinafter, the configuration will be described.
[0003]
As shown in FIGS. 8 and 9, 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.
[0004]
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.
[0005]
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.
[0006]
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.
[0007]
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.
[0008]
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).
[0009]
[Patent Document 1]
Japanese Patent Laid-Open No. 5-176875 (page 2-3, FIGS. 1 and 7)
[0010]
[Problems to be solved by the invention]
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.
[0011]
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.
[0012]
The present invention solves the above-mentioned problems, and by using a switching valve with a simple structure, it is possible to selectively inject water from a plurality of cleaning nozzles with a single cleaning pump, increasing costs and increasing the size of the entire device. The aim is to achieve low noise and water saving.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a switching valve in the middle of a water channel connecting the cleaning pump and a plurality of cleaning nozzles, the switching valve having an inlet for introducing water pressurized by the cleaning pump, A plurality of outlets for leading the introduced water to a plurality of cleaning nozzles, a water passage portion connecting the inlet and the outlet, a shaft member provided in the water passage portion, and a plurality of outlets provided in the water passage portion. A blocking member that sequentially switches , and the blocking member includes a guide hole through which the shaft member passes, an opening that is provided to face the surface on which the outlet of the switching valve is provided, and a predetermined angle in one direction around the shaft member. A rotating cam mechanism is provided on both the inlet side and the outlet side of the switching valve, and the closing member reciprocates between the inlet and outlet of the switching valve by the intermittent operation of the cleaning pump along the shaft member. One direction in conjunction with each movement of the blocking member forward and return It is obtained by adapted to the constant angular rotation.
[0014]
As a result, a switching valve can be realized with a simple configuration, and water can be selectively injected from a plurality of washing nozzles with a single washing pump, reducing noise without increasing costs and increasing the size of the entire device. Water saving can be realized.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
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. When a plurality of outlets for deriving the introduced water to the plurality of cleaning nozzles, and a water passing portion connecting said inlet and said outlet, a shaft member is provided in the water passage portion, the interior of the water passage section A closing member that sequentially switches the plurality of outlets, the closing member passing through the shaft member, an opening provided facing the surface on which the outlet of the switching valve is provided, and the shaft A cam mechanism that rotates the closing member at a predetermined angle in one direction around the member is provided on both the inlet side and the outlet side of the switching valve, and the closing member is intermittently operated by the washing pump along the shaft member. Between the inlet and the outlet of the switching valve Reciprocates, the are those configured such that the cam mechanism in conjunction with each movement of the forward and return the closure member to a predetermined angular rotation in one direction, it can be realized switching valve with a simple structure, a single wash pump in can be selectively injecting water from a plurality of cleaning nozzles, without upsizing the entire cost and equipment, it is possible to realize low noise and water saving, when the closure member is sequentially switch the outlet Since the predetermined rotation angle required for the forward and backward paths is shared, the movement distance required for the closing member to reciprocate can be shortened, and the entire switching valve can be reduced in size .
[0016]
Invention according to claim 2, in the invention described in the claim 1, the cam mechanism is made of a plurality of sliding surfaces continuing on the same circumference, in conjunction with the reciprocating motion of the closing member It can be reliably rotated by a predetermined angle in one direction.
[0017]
The invention according to claim 3 is the invention according to claim 2, wherein a plurality of sliding surfaces connected on the same circumference are formed by a spiral surface having the center formed by these sliding surfaces as an axis. In addition, the sliding of the cam surface can be smoothed, the wear can be reduced and the self-cleaning effect can prevent the accumulation of dirt and the biting of foreign matter, thereby improving the durability and reliability.
[0018]
【Example】
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 | symbol, and abbreviate | omits description.
[0019]
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.
[0020]
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.
[0021]
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, cam mechanisms 22 and 23 that act to rotate a predetermined angle in one direction are provided on the closing member 21.
[0022]
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 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 forms the cam mechanism 23 on the lower surface of the disk 26, has an inclination, and is continuous 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.
[0023]
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.
[0024]
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.
[0025]
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.
[0026]
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.
[0027]
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 return path are moved once each, the reciprocating motion is performed once. During this time, the cam mechanisms 22 and 23 cause the closing member 21 to move to the inside of the outlets 20a to 20d around the central axis 31 of the guide hole 29. , It is set to rotate by an angle formed by two adjacent outlets.
[0028]
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.
[0029]
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.
[0030]
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.
[0031]
Next, the 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 cam mechanism 22 to convert linear motion into rotational motion. The ribs 32 extend radially from the approximate center of the opening surface 30 at substantially equal intervals.
[0032]
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 with each other.
[0033]
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.
[0034]
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. Here, if the sliding surface 27a is formed of a spiral surface with the central axis 31 as an axis, the rib 32 comes into contact with the sliding surface 27a in a straight line, smoothing the sliding and reducing wear. . Further, due to the self-cleaning effect, dirt accumulation and foreign matter biting are prevented from occurring on the surface of the sliding surface 27a, so that the closing member 21 not only moves smoothly but also improves durability and reliability. It will be advantageous.
[0035]
Next, the 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 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.
[0036]
The cam mechanism 23 performs an operation similar to that of the 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. 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.
[0037]
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.
[0038]
Here, if the sliding surface 28 and the sliding surface 33 are formed of a spiral surface having the central axis 31 as an axis, the sliding surface 28 comes into contact with the sliding surface 33 on the same plane, Smoothes out and reduces wear. This also has the effect of making it difficult for dirt and the like to accumulate on the surfaces of the sliding surface 28 and the sliding surface 33, and is advantageous in smoothly moving the closing member 21.
[0039]
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.
[0040]
Thereby, the water stored in the water storage unit 5 is pressurized by the cleaning pump 8, passes through the switching valve 17, and is sprayed from the cleaning nozzles 14 to 16 toward the tableware in the tableware basket 10, and enters the water storage unit 5. Cycle on the return path. At this time, the cleaning pump 8 operates intermittently. For example, the operation is repeated such that the operation is stopped for 5 seconds after the operation for 25 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 that it rises and falls, that is, reciprocates together with the influence of gravity. become.
[0041]
This reciprocating motion is converted into rotational motion by the cam mechanisms 22 and 23 constituting the switching valve 17, and the closing member 21 rotates by a predetermined angle every time it reciprocates, and the water sent from the cleaning pump 8 is discharged to the outlet. Derived sequentially from 20a to 20d. Thereby, water is sequentially ejected from the cleaning nozzles 14-16.
[0042]
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 20 a to 20 d of the switching valve 17, the number of switching operations of the switching valve 17 is set to a multiple of 4 as described above 60 times, so that the entire tableware arranged in the tableware basket 10 can be used. Water can be sprayed uniformly.
[0043]
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.
[0044]
As described above, according to the present embodiment, water is sequentially ejected from the plurality of cleaning nozzles 14 to 16 with the switching valve 17 having a simple structure, with only one cleaning pump. Will not grow. Further, since the switching valve 17 itself does not require a special drive source and the cleaning pump 8 is only operated intermittently, it can be realized at low cost, and high reliability and durability can be obtained.
[0045]
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.
[0046]
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.
[0047]
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.
[0048]
【The invention's effect】
As described above, according to the first aspect of the present invention, the switching valve is provided in the middle of the water channel connecting the cleaning pump and the plurality of cleaning nozzles, and the switching valve is pressurized by the cleaning pump. An inlet for introducing water, a plurality of outlets for leading the introduced water to a plurality of cleaning nozzles, a water passage portion connecting the inlet and the outlet, a shaft member provided in the water passage portion, and the interior of the water passage portion A closing member that sequentially switches a plurality of outlets. The closing member closes around the shaft member, a guide hole through which the shaft member passes, an opening provided facing the surface on which the outlet of the switching valve is provided, and A cam mechanism that rotates the member in one direction by a predetermined angle is provided on both the inlet side and the outlet side of the switching valve, and the closing member is disposed between the inlet and outlet of the switching valve along the shaft member by intermittent operation of the washing pump. The reciprocating motion makes it possible to move the closing member forward and backward with the cam mechanism. Such because configured to dynamic rotated by a predetermined angle in one direction, the closure member is reciprocated by intermittent operation of the pump, the reciprocating motion is rotated by a predetermined angle by a cam mechanism provided in the closing member, very By providing a switching valve with a simple structure, water can be selectively injected from multiple cleaning nozzles with a single cleaning pump, reducing noise and saving water without increasing costs and increasing the overall size of the equipment. In addition to being able to be realized, since the predetermined rotation angle required when the closing member sequentially switches the outlet is shared between the forward path and the return path, the moving distance required for the closing member to reciprocate can be shortened, and the switching valve The whole can be reduced in size .
[Brief description of the drawings]
FIG. 1 is a sectional view of a switching valve of a dishwasher according to an embodiment of the present invention. FIG. 2 is a sectional view of the dishwasher. FIG. 3 is a side sectional view of the dishwasher. Side view of closing member of switching valve of dishwasher (b) Top perspective view of closing member of switching valve of dishwasher (c) Bottom perspective view of closing member of switching valve of dishwasher (A) Cross-sectional view taken along line AA of the dishwasher (b) Cross-sectional view taken along line BB of the dishwasher (c) Cross-sectional view taken along line CC of the dishwasher (d) Dishwasher [Fig. 6] A cross-sectional view taken along line D-D of Fig. 6. A plan view of a state in which the closing member and the opening surface of the dishwasher are in contact with each other. 8] Cross-sectional view of a conventional dishwasher [FIG. 9] Cross-sectional view of a conventional dishwasher [Explanation of symbols]
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 Cam mechanism 23 Cam mechanism

Claims (3)

Has a switching valve in the middle of the channel connecting the washing pump and a plurality of cleaning nozzles, said switching valve includes an inlet for introducing the pressurized water by the washing pump, the introduced water to the plurality of cleaning nozzles A plurality of outlets to be led out, a water passage portion connecting the inlet and the outlet, a shaft member provided in the water passage portion, and a closing member provided in the water passage portion for sequentially switching the plurality of outlets The closing member includes a guide hole through which the shaft member passes, an opening provided to face a surface on which the outlet of the switching valve is provided, and the closing member is predetermined in one direction around the shaft member. An angularly rotating cam mechanism is provided on both the inlet side and the outlet side of the switching valve, and the closing member is located between the inlet and the outlet of the switching valve by the intermittent operation of the washing pump along the shaft member. Reciprocating, and the cam mechanism Configured dishwasher to predetermined angle in one direction in conjunction with the forward and return each movement of the serial closure member. Cam mechanism according to claim 1 dishwasher according comprising a plurality of sliding surfaces continuing on the same circumference.   3. The dishwasher according to claim 2, wherein a plurality of sliding surfaces connected on the same circumference are formed as a spiral surface with the center of these sliding surfaces as an axis.

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