JPH0739747U - Dishwasher - Google Patents

Abstract

(57) [Summary] [Purpose] In a dishwasher, uneven washing of dishes due to the difference in water pressure between the main washing nozzles that inject the washing liquid toward the dishes from above and below, or above the dishes during the main washing process. To prevent floating and damage to the dishes. [Structure] A connecting member 2 having an annular shape and having a shaft 20a extending upward along the axis at the upper end of the conduit 8b.
0 is fixed via the branch B to the conduit 8c, and the connecting member 2
A passage 21 having an annular cross section is provided between the inner peripheral surface of 0 and the outer peripheral surface of the shaft 20a. The main cleaning nozzle 6 a is provided at the upper end of the connecting member 20 via the flow path 21 and the conduit 8
The shaft 20 is rotatably supported about the shaft 20a via a bearing 22 so as to be connected to the upper end of the shaft 20b.
Further, an annular collar 25 is attached to the cap 23
It is removably attached underneath. Therefore, the flow path 2
The cross-sectional area of the 1 along the horizontal direction is reduced by an amount corresponding to the cross-sectional area of the collar 25 along the horizontal direction due to the mounting of the collar 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dishwasher for washing dishes by spraying a washing liquid onto the dishes, and more particularly to an improvement of the dishwasher for controlling the spraying pressure of the washing liquid.

[0002]

[Prior art]

 FIG. 2 shows an example of a conventional dishwasher. Reference numeral 1 is a box-shaped main body, and a basket-shaped rack 4 for accommodating dishes 3 can be installed in the cleaning chamber 2 provided in the central portion of the main body 1, and below the cleaning chamber 2. It is referred to as a cleaning tank 5 that stores the cleaning liquid L. Further, reference numerals 6 and 6a are main cleaning nozzles respectively installed in the cleaning chamber 2 so as to sandwich the rack 4 from above and below, and reference numeral 7 is a main cleaning pump.

Here, the main cleaning pump 7 is connected to the cleaning tank 5 via a pipe line 8a, and the main cleaning nozzle 6a installed below the rack 4 and the main cleaning pump 7 are connected via a pipe line 8b. It is connected. Further, a branch B extending laterally is formed below the connecting portion C between the main cleaning nozzle 6a and the main cleaning pump 7, and the main cleaning nozzle 6 installed above the rack 4 moves upward from this branch B. It is connected to the main cleaning pump 7 via a pipe line 8c extending from

On the other hand, reference numerals 9 and 10 denote water heaters and boosters that sequentially heat raw water such as tap water to obtain high-temperature hot water (rinsing liquid), and reference numerals 11 and 11a sandwich the rack 4 from above and below. A rinsing nozzle and a rinsing pump, respectively, are installed in the cleaning chamber 2. Further, reference numeral 13 is a conduit for supplying the rinse liquid supplied from the water heater 9 via the booster 10 to the rinse nozzles 11 and 11a via the rinse pump 12.

Reference numeral 14 is a detergent pump for pumping the detergent W in the detergent tank 15, and reference numeral 16 is a hose for supplying the pumped detergent W to the cleaning tank 5. Further, reference numeral 17 is a drain pipe for discharging the excess cleaning liquid L and maintaining the water level of the cleaning tank 5 constant, and its upper end 17a is opened on the same plane as the proper water level in the cleaning tank 5.

To wash the dishes 3, the rack 4 containing the dirty dishes 3 is placed in the washing chamber 2, the washing chamber 2 is closed, and a switch (not shown) is operated. Then, the cleaning liquid L having a predetermined temperature, which is a mixture of warm water and the detergent W at a predetermined ratio, is stored in the cleaning tank 5. When a predetermined amount of the cleaning liquid L is stored in the cleaning tank 5, the main cleaning pump 7 operates, and the cleaning liquid L in the cleaning tank 5 is sprayed from the main cleaning nozzle 6a to the tableware 3 via the pipelines 8a and 8b. At the same time, it is sprayed from the main washing nozzle 6 toward the tableware 3 via the branch B and the pipe 8c. This is the main cleaning process.

When the main cleaning process is performed for a certain period of time, the operation of the main cleaning pump 7 is stopped and the rinsing pump 12 is operated so that the rinsing liquid stored in the booster 10 is rinsed through the pipe line 13. It is jetted from 11a toward the tableware 3. This is the rinsing process.

The main cleaning process and the rinsing process are repeated at regular intervals using a method such as timer control, and as a result, the dishes 3 are automatically cleaned. The cleaning liquid L and the rinsing liquid both flow into the cleaning tank 5, and the surplus liquid flows out from the upper end 17a of the drain pipe 17. Further, the cleaning liquid L is discharged from the cleaning tank 5 immediately after the end of the main cleaning process, but the rinse liquid that has flowed into the cleaning tank 5 during the rinsing process is continuously stored in the cleaning tank 5 and the detergent pump 14 operates to clean the detergent. W is supplied and used as the cleaning liquid L for the next main cleaning process.

[0009]

[Problems to be solved by the device]

 By the way, generally, in the main cleaning process, the cleaning power peculiar to the cleaning liquid L sprayed from the main cleaning nozzles 6, 6a to the dishes 3 chemically decomposes the dirt adhering to the surface of the dishes 3, and The dishes 3 are washed by jetting them at high pressure from the washing nozzles 6 and 6a to physically remove the dirt from the surface of the dishes 3.

However, in order to spray the cleaning liquid L in the cleaning tank 5 from the main cleaning nozzles 6 and 6a, normally, the cleaning liquid L pumped up by the main cleaning pump 7 is replaced by the main cleaning nozzles 6 and 6a installed above. In particular, in the main cleaning nozzle 6 installed above the rack 4, the water pressure of the cleaning liquid L to be sprayed is relatively likely to decrease. Therefore, not only the water pressure of the cleaning liquid L sprayed between the main cleaning nozzle 6a installed below the rack 4 is different and the dishes 3 are not sufficiently washed, but also the dishes 3 may be washed depending on the weight of the dishes 3. Due to the relatively high pressure of the cleaning liquid L ejected from the nozzle 6a, the dishes 3 vibrate and collide with each other during the main washing process, or in extreme cases, the dishes 3 float up and are damaged. I was afraid.

In particular, as in the dishwasher shown in the figure, the main cleaning nozzle 6a and the main cleaning pump 7 are directly connected to each other via a conduit 8b, and the main cleaning nozzle 6 is formed below the connecting portion C. In the case where the branched branch B is connected to the main cleaning pump 7 via the conduit 8c, the cleaning liquid L discharged from the main cleaning pump 7 is first pushed out from the connecting portion C to the main cleaning nozzle 6a side, and As a result, since the excess cleaning liquid L which cannot be completely ejected from the main cleaning nozzle 6a is ejected from the main cleaning nozzle 6 through the branch B and the pipe 8c, the above tendency becomes more remarkable.

Therefore, a method of placing a lid-shaped member on the tableware 3 housed in the rack 4 and preventing the tableware 3 from rising from the rack 4 during the main washing process by the weight of this member is also devised. Has been done. However, in this method, there is a problem in that this member becomes an obstacle, and in particular, it becomes difficult for the cleaning liquid L sprayed from the main cleaning nozzle 6 to uniformly hit the tableware 3. The present invention has been made in view of the above circumstances, and particularly aims to provide a dishwasher in which the cleaning liquid L can be sprayed from the main cleaning nozzles 6 and 6a at a uniform pressure.

[0013]

Means for Solving the Problems A dishwasher according to the present invention comprises a main washing nozzle for injecting a washing liquid from above and below toward a dish placed in a washing chamber, and a rinse for injecting a rinsing liquid toward the dish. In a dishwasher having a nozzle, in particular, a pipe line for supplying the washing liquid to the main washing nozzle is connected from below to a main washing nozzle for injecting the washing liquid toward the dishes from below, and the main washing nozzle is A flow path blocking member that reduces the cross-sectional area of the flow path of the cleaning liquid formed in the connecting portion is detachably fitted to the connecting portion with the pipe. .

[0014]

[Action]

 In the dishwasher of the present invention, in particular, at the connecting portion between the main washing nozzle for injecting the washing liquid from below toward the dishes and the pipe line for supplying the washing liquid to the main washing nozzle, the washing liquid formed at this connecting portion. A flow path blocking member that reduces the cross-sectional area of the flow path is detachably fitted. Therefore, the amount of the cleaning liquid flowing into the main cleaning nozzle via the connecting portion and the water pressure of the cleaning liquid sprayed from the main cleaning nozzle are relatively decreased accordingly.

[0015]

【Example】

 Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings. The present invention is the same as the conventional dishwasher shown in FIG. 2, except that only the structure around the connecting portion C is improved, and other parts are basically the same as the conventional dishwasher. It has the structure of. Therefore, for the other parts of the dishwasher, only the same reference numerals as those in FIG. 2 are given and their illustration is omitted, or even if they are shown, the same reference numerals as those in FIG. 2 are used. The description is omitted.

FIG. 1 is an enlarged view of the structure around the connecting portion C of the dishwasher according to the present invention. At the upper end of the conduit 8b, a connecting member 20 having an annular shape and provided with a shaft 20a extending upward along the axis is connected to a conduit 8c extending laterally (right in the figure). It is fixed via branch B. Further, between the inner peripheral surface of the connecting member 20 and the outer peripheral surface of the shaft 20a is a flow path 21 having an annular cross section.

A main cleaning nozzle 6 a is rotatably supported on the upper end of the connecting member 20 about a shaft 20 a via a bearing 22. As a result, the main cleaning nozzle 6 a is connected to a conduit 8 b via a flow path 21. It is connected to the upper end. That is, in the dishwasher of this embodiment, the connecting member 20 forms the connecting portion C between the pipe 8b and the main cleaning nozzle 6a.

Further, an annular cap 23 is fixed to the upper end portion of the shaft 20 a, and a rinse nozzle 11 a is installed at the upper end surface of the cap 23 and the upper end of the shaft 20 a protruding from the upper end surface of the cap 23. It is rotatably supported about the shaft 20a via 24. Further, the upper end portion of the bearing 24 is rotatably connected to the conduit 13 extending from above about the shaft 20a, and as a result, the rinse nozzle 11a is connected to the conduit 13 via the bearing 24.

Furthermore, in the dishwasher of this embodiment, an annular collar (flow path blocking member) 25 is detachably attached to the shaft 20 a below the cap 23. As a result, the cross-sectional area of the flow path 21 along the horizontal direction is reduced by the amount of the ring 25, which corresponds to the cross-sectional area of the collar 25 along the horizontal direction. On the other hand, the axial movement of the collar 25 is blocked by the cap 23.

Next, the main washing process of the tableware 3 in the dishwasher having the above configuration will be described below. The rinsing process and other processes required for cleaning the dishes 3 are the same as those of the conventional dishwasher described above, and thus the description thereof will be omitted.

After placing the rack 4 containing the dirty dishes 3 in the cleaning chamber 2, the cleaning chamber 2 is closed and a switch (not shown) is operated to mix warm water and the detergent W at a predetermined ratio. The cleaning liquid L having a predetermined temperature is stored in the cleaning tank 5. When a predetermined amount of the cleaning liquid L is stored in the cleaning tank 5, the main cleaning pump 7 operates and the cleaning liquid L in the cleaning tank 5 flows from the conduit 8a into the conduit 8b via the main cleaning pump 7.

The cleaning liquid L that has flowed into the pipe line 8b tends to further flow into the main cleaning nozzle 6a via the flow path 21, but as described above, by mounting the collar 25 on the shaft 20a, Since the cross-sectional area along the horizontal direction is reduced by the amount corresponding to the cross-sectional area along the horizontal direction of the collar 25, the amount of the cleaning liquid L flowing into the main cleaning nozzle 6a through the flow path 21 is transferred to the shaft 20a. The cross-sectional area of the flow passage 21 is reduced by the amount of reduction of the collar 25. Therefore, in the case of the dishwasher of the present embodiment, the pressure of the cleaning liquid L sprayed from the main cleaning nozzle 6a decreases with the mounting of the collar 25.

On the other hand, the cleaning liquid L that cannot flow into the flow path 21 flows into the pipe line 8c via the branch B and further flows into the main cleaning nozzle 6, but as described above, flows into the main cleaning nozzle 6a via the flow channel 21. Since the amount of the cleaning liquid L that flows in decreases in accordance with the reduction amount of the cross-sectional area of the flow path 21, the amount of the cleaning liquid L that flows into the main cleaning nozzle 6 via the branch B and the conduit 8c is the same as the main cleaning nozzle. The amount of the cleaning liquid L flowing into 6a is increased. Therefore, the pressure of the cleaning liquid L jetted from the main cleaning nozzle 6 also rises accordingly.

As described above, in the dishwasher of this embodiment, the collar 25 is attached to the shaft 20a, and the cross-sectional area of the flow passage 21 along the horizontal direction is changed to the cross-sectional area of the collar 25 along the horizontal direction. By decreasing the amount by a corresponding amount, the pressure of the cleaning liquid L sprayed from the main cleaning nozzle 6a is lowered and the pressure of the cleaning liquid L sprayed from the main cleaning nozzle 6 is increased.

Therefore, simply by appropriately selecting the collar 25 having an outer diameter such that the pressure of the cleaning liquid L ejected from the main cleaning nozzle 6a and the pressure of the cleaning liquid L ejected from the main cleaning nozzle 6 match. It becomes possible to inject the cleaning liquid L from both the main cleaning nozzles 6 and 6a at a uniform pressure. As a result, there are problems such as uneven washing of the dishes 3 due to the difference in water pressure between the main washing nozzles 6 and 6a, or floating of the dishes 3 above during the main washing process, and the accompanying damage to the dishes 3. Therefore, the dishes 3 can be washed at all times stably and safely. Further, the manufacturing of the collar 25 and the like is very easy and inexpensive, and the above-mentioned functions can be added to the above-mentioned conventional dishwasher by very easy and inexpensive modification. There is also.

In the above embodiment, since the main cleaning nozzle 6a and the rinsing nozzle 11a are required to be rotatable, the connecting portion C has an annular shape and has the shaft 20a on the axis. The member 20 is provided with a flow passage 21 having an annular cross section between the inner peripheral surface of the connecting member 20 and the outer peripheral surface of the shaft 20a, and is also detachably attached to the shaft 20a as a flow passage blocking member. However, the shapes of the connecting portion C and the blocking member are not necessarily limited to the shapes of the connecting member 20 and the collar 25.

That is, in the connecting portion C and the blocking member, a flow path for the cleaning liquid L is formed in the connecting portion C, and the flow path blocking member reduces the cross-sectional area of the flow path along the horizontal direction. Moreover, as long as it is detachably fitted to the connecting portion C, any shape can be used.

[0028]

[Effect of device]

 As described above, by using the dishwasher of the present invention, uneven washing of the dishes caused by the difference in the water pressure between the main washing nozzles that inject the washing liquid from above and below toward the dishes, or the main washing process The problems such as the floating of the tableware in the inside and the accompanying damage to the tableware are prevented. As a result, it is possible to achieve an excellent effect that washing of dishes is always stable, safe and reliable.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of the structure of a dishwasher according to the present invention.

FIG. 2 is a diagram showing an example of the structure of a conventional dishwasher.

[Explanation of symbols]

 1 main body 2 washing room 3 tableware 4 rack 5 washing tank 6, 6a main washing nozzle 7 main washing pump 8a, 8b, 8c, 13 conduit 9 water heater 10 booster 11, 11a rinsing nozzle 12 rinsing pump 14 detergent pump 15 detergent Tank 16 Hose 17 Drain pipe 17a Drain pipe upper end 20 Connection member 20a Shaft 21 Flow path 22, 24 Bearing 23 Cap 25 Color B Branch C Connection part L Cleaning liquid W Detergent

Claims (3)

[Scope of utility model registration request] 1. A dishwasher having a main washing nozzle for jetting a washing liquid from above and below toward a dish placed in a washing chamber, and a rinsing nozzle for jetting a rinsing liquid toward the dish, wherein To the main cleaning nozzle for injecting the cleaning liquid from below toward the main cleaning nozzle, a pipe line for supplying the cleaning liquid to the main cleaning nozzle is connected from below, and the main cleaning nozzle and the pipe line are formed at this connection part. A dishwasher, wherein a flow path blocking member that reduces the cross-sectional area of the flow path of the cleaning liquid is detachably fitted. 2. A main cleaning nozzle for injecting a cleaning liquid from above toward the tableware is supplied with the cleaning liquid from the pipeline via a branch provided below the connecting portion of the pipeline. The dishwasher according to claim 1, wherein: 3. The shaft according to claim 1, wherein a shaft is provided on the axis of the flow path, and the flow path blocking member is an annular collar mounted on the shaft. Dishwasher.