JPH078436A - Tableware washing machine - Google Patents

Abstract

PURPOSE:To provide the tableware washing machine whose washing efficiency is high, and also, in which a washable tableware-containing area is enlarged. CONSTITUTION:A washing means for injecting washing water consists of a first arm nozzle 5 for communicating with a washing pump 3, and a second and a third arm nozzles 6, 7 which allow the rotary axis center to be eccentric by a prescribed distance against this first arm nozzle 5, and also, rotate roughly horizontally. In such a state, a second arm nozzle 6 rotates on a first arm nozzle 5 by the own injection reaction force, and a third arm nozzle 7 is interlocked and rotated at a rotational speed of a prescribed ratio to a first arm nozzle 5 by an interlocking mechanism.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing by spraying washing water, and more particularly to improving the washing efficiency.

[0002]

2. Description of the Related Art A conventional dishwasher will be described below with reference to FIG.

The dishes are stored in the dish basket 32 of the washing tank 31, and detergent is added to start the operation. When the operation is started, first, a water supply process of supplying a predetermined amount of cleaning water to the cleaning tank 31 is executed. Subsequently, a main washing step is performed in which the washing water pressurized by the washing pump 33 and heated by the heater 34 is jetted from the washing nozzle 35 together with the detergent. The cleaning water is sprayed vertically or obliquely upward from the spray holes 36 of the cleaning nozzle 35, and the cleaning nozzle 35 is rotated substantially horizontally by this spray reaction force. Therefore, most of the washing water is jetted while being inclined in the direction opposite to the rotation direction of the washing nozzle 35 and collides with the dishes. Collision force of this wash water
The dishes are washed by the action of detergent and heat. After the main washing step for a predetermined time, the next step is a draining step for discharging the wash water containing the stains washed off from the dishes and the like to the outside of the machine. Subsequently, a water supply process for newly supplying wash water, and detergents and residual dishes (dirt adhering to dishes is also referred to as residual dishes)
The rinsing step of spraying washing water from the washing nozzle 5 for rinsing dirty dishes and the draining step are repeated four times in succession to complete the washing step. 3
Reference numeral 7 is a control device that controls the operation of the cleaning pump 33, the heater 34, and the like.

[0004]

In the conventional dishwasher having the above-mentioned structure, the injection path of the washing water from the washing nozzle 35 is constant as shown in FIG. That is, the cleaning water is repeatedly sprayed only on the tableware set at a specific position. That is, in a tableware storage area (hereinafter referred to as a cleaning area) configured by a tableware basket, a cleaning area having a high cleaning effect in which cleaning water directly collides with the tableware and a cleaning area having a low cleaning effect indirect collision. Exists. The reason for this is that the cleaning nozzle 35 used is a single arm nozzle that rotates substantially horizontally.

Therefore, in order to obtain a predetermined cleaning power in the entire cleaning area, it is necessary to enhance the cleaning power in the cleaning area having a low cleaning effect, that is, the secondary water flow must be sufficiently secured, and therefore, the injection is performed. The injection pressure and flow rate from the holes 36 must be increased. Hereinafter, the energy calculated from the injection pressure and the flow rate of the wash water will be referred to as the wash water power.

For the above reasons, the conventional structure is
The required washing water power of the washing nozzle 35 is excessive. In other words, the cleaning efficiency of the cleaning nozzle 35 is low due to the low uniform cleaning property of the cleaning nozzle 35, and as a result, the cleaning pump 33 needs to have a large pressurizing and discharging capacity. So with this,
The operation noise of the cleaning pump 33 and the cleaning tank 3 for a large amount of cleaning water
The first problem is that the noise of collision with No. 1 or the noise of its dropping becomes loud and the cleaning noise is high.

Further, as is clear from the rotation locus of the injection holes 36 on the cleaning nozzle 35 shown in FIG. 9, the cleaning region where a single arm nozzle can exert its original cleaning power is substantially circular. Therefore, when the cleaning tank 31 has a rectangular shape, there is a second problem that the cleaning power is insufficient at the four corners. In these four corners, not only the dishes and bowls, but especially the openings such as glasses, teacups, and baby bottles have small openings, and there is a problem with the washing performance of cylindrical dishes that are difficult to spray washing water on the inner surface. It was

Therefore, as a solution to the first problem, the inventors have already provided a second arm nozzle for performing a planetary motion on the first arm nozzle and provided an auxiliary injection hole in the first arm nozzle. It proposes a dishwasher having a washing nozzle with the provided configuration, a dishwasher having a rotatable water channel in a washing tank, and a plurality of washing nozzles on the water channel. These proposals show that the cleaning efficiency can be improved by the uniform cleaning property of the cleaning nozzle, and the cleaning pump can be downsized and the cleaning noise can be reduced. With these products, it is possible to significantly reduce the injection pressure and the flow rate from the injection holes by improving the cleaning efficiency, but the insufficient cleaning power at the four corners is the same problem as the conventional one.

In order to solve the second problem of insufficient cleaning performance at the four corners, the inventors have already provided a second cleaning nozzle that works in conjunction with the first cleaning nozzle, and the movement trajectory of the injection hole is cleaned. A dishwasher with a cleaning nozzle that always passes through the diagonal of the tank to clean the four corners, and a rectangular cleaning tank and a second arm nozzle, and the movement trajectory of the injection holes provided at both ends must be We propose a dishwasher that passes through the four corners of the washing tank. These proposals show that the cleaning power is improved by complementing the rotation trajectory of the cleaning nozzle to the four corners of the cleaning tank. However, when viewed from the entire cleaning area, there is a problem that the cleaning area having a high cleaning effect and the cleaning area having a low cleaning effect are present as in the conventional case, and the uniform cleaning property as a whole is low.

The present invention solves the above problems, and a first object of the present invention is to provide a dishwasher having a high washing efficiency and an enlarged washable dish storage area. .

A second object of the present invention is to provide a dishwasher which improves the washing performance especially in the vicinity of the outer peripheral portion of the dish basket and at the same time improves the rotation reliability of the arm nozzle.

A third object of the present invention is to provide a dishwasher having a high cleaning efficiency and a high reliability of rotation of the cleaning nozzle.

[0013]

The first means of the present invention for achieving the first object is to provide a washing tank, a dish basket for storing dishes, a washing pump for pressurizing the washing water, and a washing water. And a cleaning means for injecting the first arm nozzle, which is rotatably supported by a nozzle bearing communicating with a cleaning pump, and a rotation axis of the first arm nozzle is eccentric by a predetermined distance. A dishwasher having a horizontally rotating second arm nozzle and a third arm nozzle, and an interlocking mechanism for interlockingly rotating the third arm nozzle with the first arm nozzle at a rotation speed of a predetermined ratio. It is what

A second means of the present invention for achieving the second object is a washing tank, a tableware basket for storing tableware,
A cleaning pump for pressurizing the cleaning water; and a cleaning means for injecting the cleaning water. The cleaning means includes a first arm nozzle axially supported by a nozzle bearing communicating with the cleaning pump, and the first arm nozzle. The second arm nozzle and the third arm nozzle that decenter the rotation axis by a predetermined distance and rotate substantially horizontally, and the third arm nozzle rotate in conjunction with the first arm nozzle at a predetermined rotation speed. And a dishwasher in which at least one injection hole of the first arm nozzle is located outside the rotation axis of the second arm nozzle or the third arm nozzle. To do.

A third means of the present invention for achieving the third object is that in addition to the constitution of the first means or the second means of the present invention, the first arm nozzle is bent vertically. ,
The dishwasher is one in which the injection holes of the first, second and third arm nozzles are formed on substantially the same plane.

[0016]

According to the first means of the present invention, the injection locus of the second arm nozzle is randomized, and at the same time, the third arm nozzle acts so as to extend the rotating region of the cleaning nozzle to the four corners of the cleaning tank. It is a thing. Therefore, the uniform cleaning property in the cleaning area is improved, the cleaning efficiency is improved, and the tableware storage area can be expanded.

The second means of the present invention is characterized in that at least one injection hole of the first arm nozzle is located outside the rotation axis of the second arm nozzle or the third arm nozzle. The one arm nozzle acts so as to increase the propulsive force by the reaction force of the jet water. That is,
Even when foreign matter such as sand or food enters the rotary sliding part of the arm nozzle, a larger propulsive force than the frictional resistance can be obtained, and the first arm nozzle rotates stably and reliably The cleaning performance of is obtained.

A third means of the present invention is such that the first arm nozzle is bent in the vertical direction and the injection holes of the first, second and third arm nozzles are formed on substantially the same plane. With the distance between the lower surface of the tableware in the cleaning area and the spray hole being constant, the cleaning water can be surely sprayed onto the contaminated surface of the tableware from the optimum distance corresponding to the spray hole. In particular, when the radius of rotation of the first arm nozzle is extended outside the rotation area of the second arm nozzle to provide a spray hole at the tip with a spray angle capable of obtaining a propulsion force, the cleaning nozzle becomes stable. In addition to rotating by rotating, it is possible to surely spray the washing water on the inner surface of deep dishes such as bowls and deep bowls, so that high washing performance is obtained.

[0019]

【Example】

(Embodiment 1) An embodiment of the first means of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a washing tank, and 2 is a dish basket for storing dishes, which is provided in the washing tank 1. 3 is a cleaning pump for pressurizing the cleaning water, 3a is a nozzle bearing communicating with the cleaning pump 3, and 4 is a heater for heating the cleaning water. Reference numeral 5 is a first arm nozzle pivotally supported by the nozzle bearing 3a, and 6 and 7 are second arm nozzles provided on the first arm nozzle 5 with a rotational axis eccentric by a predetermined distance. It is the third arm nozzle. 8
Numerals 9 and 10 are spray holes for spraying the wash water provided on the first arm nozzle 5, the second arm nozzle 6, and the third arm nozzle 7, respectively. Further, as shown in FIG. 2, 11.12 and 13 constitute an interlocking mechanism for interlocking rotation of the third arm nozzle 7 with the first arm nozzle 5 at a rotational speed of a predetermined ratio. These are fixed gears, intermediate gears, and drive gears. As above, the cleaning pump 3 and the nozzle bearing 3a
The first arm nozzle 5, the second arm nozzle 6, the third arm nozzle 7, the fixed gear 11, the intermediate gear 12, and the drive gear 13 constitute a cleaning unit that sprays cleaning water. Reference numeral 14 is a control device that controls the cleaning pump 3, the heater 4, and the like.

The operation of this embodiment will be described below. First, it is assumed that the tableware is stored in the tableware basket 2, mounted at a predetermined position in the cleaning tank 1, and a switch (not shown) is turned on. When the switch is turned on and the operation is started, the control device 14 first executes a water supply process of supplying a predetermined amount of cleaning water to the cleaning tank 1. Then, the washing water pressurized by the washing pump 4 is used together with the detergent to wash the first arm nozzle 5 and the second arm nozzle 6.
The main washing step of spraying from the spray holes 8, 9, 10 provided in the third arm nozzle 7 is executed. After the main washing step for a predetermined time, the next step is a draining step for discharging the wash water containing the stains washed off from the dishes and the like to the outside of the machine. Continuously, the water supply process of supplying new cleaning water, the rinsing process of spraying the cleaning water from the cleaning nozzle to rinse the dishes soiled with detergent and leftover food, and the drainage process are consecutive, and these are repeated four times for cleaning. The process ends. As described above, the basic operation of the cleaning process is the same as that of the conventional configuration.

During the cleaning step, the second arm nozzle 6
2 rotates on the first arm nozzle 5 in the direction of the arrow 6a on the first arm nozzle 5 by the reaction force of its own washing water injection, and at the same time, the first arm nozzle 5 is washed in accordance with the rotation of the first arm nozzle 5 in the direction of the arrow 5a. Orbit the lower part of the area. As a result, the washing water can be uniformly sprayed from the spray holes 8 of the first arm nozzle 5 and the spray holes 9 of the second arm nozzle 6 to each part of the tableware. That is, a predetermined washing power can be obtained with a small power of washing water, stable washing performance can be obtained even with a small washing pump, and the collision noise and the dropping noise of the jet washing water against the washing tank 1 are reduced. As a result, the cleaning noise can be significantly reduced. The above is what we have already proposed.

In the present embodiment, particularly, the third arm nozzle 7
An interlocking mechanism for rotating the first arm nozzle 5 at a predetermined ratio with respect to the rotation speed of the first arm nozzle 5 is provided. That is, using the rotational force of the first arm nozzle 5 as a drive source, the intermediate gear 12 provided below the first arm nozzle rotates around the fixed gear 11. This intermediate gear 12
The drive gear 13 that rotationally drives the third arm nozzle 7 rotates in response to the rotational movement of. In this way, the third arm nozzle 7 rotates in the direction of arrow 7a. Here, in the present embodiment, the fixed gear 11 and the third arm nozzle 7 are rotated together with the first arm nozzle 5 at a rotation speed of a predetermined ratio.
The number of teeth and the module of the intermediate gear 12 and the drive gear 13 are set. As a result, the rotation area of the third arm nozzle 7 is expanded to the four corners of the cleaning tank 1. Therefore, the wash water sprayed from the two spray holes 10 provided in the third arm nozzle 7 can wash the dishes set in the four corners of the dish basket 2.

FIG. 3 shows the rotation locus of the third arm nozzle 7 and the rotation locus of its injection hole 10. That is, the rotation trajectory of the injection hole 10 is an elliptical trajectory 7c, 7d. Further, 6b is a rotation locus of the first arm nozzle 5 and the second arm nozzle 6, and the inside of the rectangular washing tank 1 can be washed almost uniformly over the entire surface by both of these washing loci.

As described above, according to this embodiment, it is possible to expand the washable dish storage area up to the four corners of the dish basket 2, and it is possible to wash dish dishes larger than those of the conventional construction. It is very easy to use. Also,
Unlike the one that has only the interlocking mechanism already proposed,
The cleaning effect is almost uniform over the entire cleaning region, and a higher cleaning effect can be obtained.

(Embodiment 2) Next, an embodiment of the second means of the present invention will be described with reference to FIG. The basic structure of the mechanical parts is the same as the structure shown in FIG. Reference numeral 15 is a first arm nozzle, 16 is a second arm nozzle, and 17 is a third arm nozzle. 18 ・ 19 ・
Reference numeral 20 is an injection hole for injecting cleaning water provided in each of the first arm nozzle 15, the second arm nozzle 6, and the third arm nozzle 7. Here, 18a is an injection hole provided in the first arm nozzle 15, and its injection direction is inclined by a predetermined angle from the vertical direction in order to obtain a stable rotational propulsive force. Further, the installation position of the injection hole 18a is outside the rotation axis of the second arm nozzle 16.

The operation of this embodiment will be described below. The basic operation relating to the cleaning process is the same as that of the first embodiment, and therefore its explanation is omitted. In this embodiment, the first arm nozzle 15 receives a large rotational propulsive force due to the reaction force of the cleaning water sprayed from the spray holes 18a. That is, from the center of rotation of the first arm nozzle 15 to the injection hole 1
The distance to 8a is longer than in the conventional case, and a large rotational propulsive force proportional to this distance can be obtained. Therefore, even when foreign matter such as sand or food is mixed in the rotary sliding portion, a rotational propulsion force larger than the frictional resistance is obtained, and the first arm nozzle 15 rotates stably. . That is, it is possible to reliably obtain a predetermined cleaning performance.

In particular, the frictional resistance of the rotary sliding portion of the second arm nozzle 16 or the third arm nozzle 17 and the rotational propulsive force of both arm nozzles stop the rotational movement of the first arm nozzle 15. From this point as well, providing the installation position of the injection hole 18a outside these rotary shaft centers has a great effect.

(Embodiment 3) Next, an embodiment of the third means of the present invention will be described with reference to FIG. The basic structure of the mechanical parts is the same as the structure shown in FIG. 22
Is a first arm nozzle, 23 is a second arm nozzle, 2
4 is a third arm nozzle. 25, 26, and 27 are the first arm nozzle 22 and the second arm nozzle 2, respectively.
3, an injection hole for injecting cleaning water provided in the third arm nozzle 24. The first arm nozzle 22 has a shape bent in the vertical direction so that the injection holes 25, 26, and 27 of the first, second, and third arm nozzles are substantially on the same plane. Reference numeral 25a denotes an injection hole provided in the first arm nozzle 22, which is provided outside the rotation axis of the second arm nozzle 26. With the above configuration, each injection hole 25a
-The distance A from 26 and 27 to the tableware stored in the tableware basket 2 is almost the same.

The operation of this embodiment will be described below. The basic operation relating to the cleaning process is the same as that of the first embodiment, and therefore its explanation is omitted. In this embodiment, since the tableware arranged in the washing area and the injection holes 25a, 26 and 27 have the same distance, the design of the setting position of each injection hole is very easy. Further, the injection holes 25a are set to inject the cleaning water in a direction inclined by a predetermined angle from the vertical direction, and thus are effective as a drive source for the first arm nozzle 22 and the first arm nozzle 22 is stable. Can rotate. Further, the cleaning water sprayed from the spray hole 25a does not hit the second arm nozzle 23,
It is always sprayed on the tableware. Therefore, high cleaning performance can be obtained without hindering the rotation of the second arm nozzle 23.

However, when the spray hole 25a for spraying the wash water at a predetermined angle is arranged at such a position that the distance from the tableware exceeds a certain value, there is a thick bowl, soup bowl, bowl or the like. Cleaning water cannot be sprayed on the inner surface of tableware.

FIG. 6 shows a state of cleaning by the injection hole 25a. That is, when the spray hole 25a moves and passes under the tableware as the first arm nozzle 22 rotates, in the range C, when the vertical distance from the tableware basket 2 is A, the bottom of the inner surface of the tableware is It shows that the washing water is surely sprayed up to. On the other hand, FIG. 7 shows a range C in which the injection hole 18a of the above-described embodiment moves under the tableware.
6 shows that when the distance from the tableware basket 2 is B (where A <B), the number of tableware in which cleaning water is reliably sprayed to the bottom of the inner surface is smaller than that in FIG. That is, in this embodiment, the wash water can be surely jetted to the position where the washing power of all the jet holes 25a, 26 and 27 acts on the contaminated surface of the tableware, so that the washing water power is small. High cleaning performance is always obtained. At the same time, by reducing the power of the washing water and downsizing the washing pump, the collision noise of the washing water and the operating noise of the washing pump are reduced, and the noise can be reduced.

If the structure of this embodiment is adopted at the same time as the structure of the first embodiment, the rotation reliability of the first arm nozzle does not change, but all the injection holes 8 and 9 are attached to the contaminated surface of the tableware. Since it is possible to reliably inject the cleaning water to the position where the cleaning power of 10 and 10 is maximized, a higher cleaning performance can be obtained with a small power of the cleaning water.

[0033]

The first means of the present invention comprises a washing tank, a dish basket for storing dishes, a washing pump for pressurizing the washing water, and a washing means for jetting the washing water. A first arm nozzle axially supported by a nozzle bearing communicating with the cleaning pump, and a second arm nozzle and a third arm nozzle that are eccentric to each other by a predetermined distance and rotate substantially horizontally. As a configuration having an arm nozzle and an interlocking mechanism in which the third arm nozzle interlocks with the first arm nozzle at a rotation speed of a predetermined ratio, the injection locus of the second arm nozzle is randomized. As a result, the uniform cleaning property in the cleaning area is improved and the cleaning efficiency is improved.
At the same time, it is possible to provide an easy-to-use dishwasher that can expand the effective dish storage area.

A second means of the present invention is a washing tank, a dish basket for storing dishes, a washing pump for pressurizing washing water,
Cleaning means for injecting cleaning water, wherein the cleaning means is a first arm nozzle pivotally supported by a nozzle bearing communicating with a cleaning pump, and the rotation axis of the first arm nozzle is eccentric by a predetermined distance. And a second arm nozzle and a third arm nozzle that rotate substantially horizontally, and an interlocking mechanism that causes the third arm nozzle to interlock with the first arm nozzle at a rotation speed of a predetermined ratio, At least one injection hole of the first arm nozzle is located outside the rotation axis of the second arm nozzle or the third arm nozzle, and foreign matter such as sand and food is slidably rotated. It is possible to provide a highly reliable dishwasher in which the arm nozzle can be stably rotated even if it is mixed in the portion, and a predetermined washing performance can be reliably obtained.

Furthermore, in addition to the constitution of the first means or the second means of the present invention, the third means of the present invention is characterized in that the first arm nozzle is bent in the vertical direction, and The spray holes of the three arm nozzles are formed on almost the same plane, and the distance between the tableware in the washing area and each spray hole is the same, and the wash water is reliably contaminated from the optimum distance corresponding to the spray holes. It is possible to provide a dishwasher that can be sprayed onto the surface and can reliably spray the washing water onto the inner surface of the dish such as a bowl or a deep bowl and has excellent cleaning performance.

[Brief description of drawings]

FIG. 1 is a sectional view of a dishwasher according to an embodiment of the first means of the present invention.

FIG. 2 is a plan view showing an interlocking mechanism of arm nozzles of the dishwasher.

FIG. 3 is an explanatory view showing a cleaning area of the dishwasher.

FIG. 4 is a sectional view of the dishwasher in the embodiment of the second means of the present invention.

FIG. 5 is a sectional view of the dishwasher in the embodiment of the third means of the present invention.

FIG. 6 is an explanatory view showing the washing water spray of the dishwasher.

FIG. 7 is an explanatory view showing a washing water jet different from that in FIG. 6 in the dishwasher.

FIG. 8 is a sectional view of a conventional dishwasher.

FIG. 9 is an explanatory view showing a cleaning area of the dishwasher.

[Explanation of symbols]

1 Cleaning Tank 2 Tableware Basket 3 Cleaning Pump 4 Heater 5 First Arm Nozzle 6 Second Arm Nozzle 7 Third Arm Nozzle 8-10 ・ 18-20 ・ 18a ・ 25-27 ・ 25a
Injection hole 14 control device

Claims (3)

[Claims] 1. A washing tank and a tableware basket for storing tableware,
A cleaning pump for pressurizing the cleaning water; and a cleaning means for injecting the cleaning water. The cleaning means includes a first arm nozzle axially supported by a nozzle bearing communicating with the cleaning pump, and the first arm nozzle. The second arm nozzle and the third arm nozzle that decenter the rotation axis by a predetermined distance and rotate substantially horizontally, and the third arm nozzle rotate in conjunction with the first arm nozzle at a predetermined rotation speed. A dishwasher with an interlocking mechanism. 2. A washing tank and a tableware basket for storing tableware,
A cleaning pump for pressurizing the cleaning water; and a cleaning means for injecting the cleaning water. The cleaning means includes a first arm nozzle axially supported by a nozzle bearing communicating with the cleaning pump, and the first arm nozzle. The second arm nozzle and the third arm nozzle that decenter the rotation axis by a predetermined distance and rotate substantially horizontally, and the third arm nozzle rotate in conjunction with the first arm nozzle at a predetermined rotation speed. The dish washer having the interlocking mechanism as described above, wherein at least one injection hole of the first arm nozzle is located outside the rotation axis of the second arm nozzle or the third arm nozzle. 3. The tableware according to claim 1, wherein the first arm nozzle is bent in a vertical direction, and the injection holes of the first, second and third arm nozzles are formed on substantially the same plane. washing machine.