JPH08206052A - Dishwasher - Google Patents

Abstract

PURPOSE: To enhance the washing performance by carefully washing those dishes etc., which are contaminated hard, and performing the wash uniformly to those which are located at every internal corner of a dish cage. CONSTITUTION: As two arms 40, 41 of the first arm nozzle 37 have different heights, the height of the second arm nozzle 38 is different from that of the third arm nozzle 39; that is, the nozzle 38 is higher than the nozzle 39. Thereby the washing water spouted out of a jet 48 of the second arm nozzle 38 runs vigorously against the dishes because of short distance between the nozzle and dishes. The washing water spouted out of the jet 48 of the third arm nozzle 39 goes over a wide range of dishes uniformly because of long distance between the nozzle and dishes.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a dishwasher.

[0002]

2. Description of the Related Art Conventionally, in a dishwasher, a rotatable arm nozzle is provided on the bottom of a washing chamber, and a plurality of injection holes are formed on the upper surface of the arm nozzle so that the washing water stored at the bottom of the washing chamber can be pumped. There is a method for cleaning tableware by spraying cleaning water from the spray holes while rotating the arm nozzle and spraying the cleaning water on the tableware.

Further, in order to wash a wider area more evenly, for example, Japanese Patent Laid-Open No. 7-8436 (A47L) is used.
15/42).

In this device, a first arm nozzle is rotatably provided on the bottom surface of the cleaning chamber, and second arm nozzles and third arm nozzles are rotatably provided on the upper surfaces of the arms on both sides of the first arm nozzle. ing. Then, the cleaning water stored in the cleaning chamber is sent to the second and third arm nozzles by the pump through the first arm nozzle, and the first, second and third arms are supplied.
The cleaning water is sprayed from the spray holes of the second and third arm nozzles while rotating the arm nozzle.

[0005]

However, in the dishwasher as disclosed in JP-A-7-8436 (A47L15 / 42), the second arm nozzle and the third arm nozzle are used.
Since the arm nozzles have the same height, the pressure of the wash water that hits the dishes is the same, and the angle of the wash water that hits the dishes is also the same.

Therefore, when the distance between the tableware and the arm nozzle is shortened in order to increase the pressure of the washing water so that the tableware can be washed strongly, the cleaning range is narrowed, while the tableware is tried to be widened. If the distance between the arm nozzle and the arm nozzle is increased, the pressure applied to the washing water becomes small and the dishes cannot be washed strongly.

The present invention relates to an improvement of a dishwasher and solves such a problem.

[0008]

The dishwasher of the present invention comprises:
A washing chamber for accommodating tableware, a first arm nozzle that is rotatably supported on the bottom surface of the washing chamber in a horizontal direction, and is rotated by feeding water into the arm, and an upper surface of the arms on both sides of the first arm nozzle. A second arm nozzle and a third arm nozzle that are respectively rotatably supported in the horizontal direction and that rotate by water supply into the arm, and the second arm nozzle and the third arm nozzle that are respectively formed, and spray toward the tableware. The second arm nozzle and the third arm are provided with a hole and a pump for sending the cleaning water stored in the bottom portion of the cleaning chamber to the second arm nozzle and the third arm nozzle via the first arm nozzle. The height is different from that of the nozzle.

[0009]

When the second arm nozzle is set higher than the third arm nozzle, the cleaning water sprayed from the spray hole of the second arm nozzle hits the tableware strongly because the distance between the arm nozzle and the tableware is short. On the other hand, the cleaning water sprayed from the spray holes of the third arm nozzle spreads over a wide range of tableware because the distance between the arm nozzle and the tableware is long.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 is a dishwasher according to an embodiment of the present invention. This dishwasher is a built-in type that is installed by installing the main body in a sink.

Reference numeral 2 is a machine frame of the dishwasher 1, and 3 is a cleaning chamber provided in the machine frame 2, the front surface of which is open. Four
Is a door for opening and closing the cleaning chamber 3, the lower end of which is supported so as to open toward the front. Reference numeral 5 denotes an operation panel attached to the upper portion of the door 4, which includes an operation key group for setting various cleaning courses, a cleaning course, and a display LED group showing the degree of progress of driving.

6 is an upper basket for storing dishes, which is arranged in the upper stage of the washing chamber 3, and 7 is a lower basket for storing dishes, which is also arranged in the lower stage.

Reference numeral 8 denotes slide fittings (only one side is shown in the drawing) provided on the left and right sides of the upper basket 6 for supporting the upper basket 6. The upper basket 6 is vertically movably attached to the slide fitting 8 so as to be sandwiched from above and below by a pair of rotatable rollers 9 provided on the rear side. The slide metal fitting 8 is formed in a C-shaped cross section, and accommodates a pair of support rollers 10 provided from the left and right walls above the cleaning chamber 3 inside and is attached to these left and right walls so as to be movable back and forth. Has been. Thus, when the tableware is taken out, the slide metal fitting 8 can be pulled out forward, and the upper basket 6 can be drawn further forward with respect to the slide metal fitting 8.

Reference numeral 11 denotes a roller rotatably attached to the four corners of the bottom of the lower basket 7 (only two rollers on one side are shown in the figure), and a guide rail provided from the lower wall of the cleaning chamber 3. It is mounted on 12 so that it can move back and forth.

Reference numeral 13 denotes a cross section C provided on the back surface of the door 4.
It is a character-shaped guide member, and is arranged so as to be positioned substantially on the same straight line as the guide rail 12 when the door 4 is opened. When the lower basket 7 is pulled out, the guide member 13 accommodates and guides the roller 11 therein so that the lower basket 7 does not fall down during movement.

Thus, when the tableware is taken out, the lower basket 7 is pulled out to the back surface of the opened door 4.

14 is disposed below the lower basket 7,
It is a lower nozzle for applying washing water to the tableware in the lower basket 7. A nozzle shaft 15 is erected on the bottom surface of the cleaning chamber 3 and rotatably supports the lower nozzle 14 in a horizontal direction, and also functions as a water supply pipe for supplying cleaning water to the lower nozzle 14.

Reference numeral 16 denotes a tower type upper stage nozzle connected to the lower stage nozzle 14, and the tip end thereof extends to the vicinity of the upper stage basket 6. An injection port 17 is formed at the peripheral edge of the tip. The upper nozzle 16 is
This is for applying washing water to the tableware in the upper basket 6.

Reference numeral 18 denotes a drainage tank formed in front of the bottom of the cleaning chamber 3, and reference numeral 19 denotes a filter attached to the upper surface of the drainage tank 18 for removing residual foods which have flowed down from the dishes.

Reference numeral 20 denotes a washing pump, and a casing 21 having a suction port connected to the drainage tank 18, and this casing 2
It is composed of an impeller 22 arranged inside 1 and a motor 23 for driving the impeller 22. The discharge port of the cleaning pump 20 is connected to the nozzle shaft 15 via a connection pipe 24.

Reference numeral 25 denotes a drain pump connected to the drain tank 18 for discharging the cleaning water in the cleaning chamber 3 to the outside of the machine through a drain hose 26.

Reference numeral 27 is a water level detecting device, which is used for the cleaning chamber 3
It is for detecting a predetermined water level inside. 28 is a loop-shaped sheathed heater provided at the bottom of the cleaning chamber 3,
The cleaning water and rinse water stored in the bottom of the cleaning chamber 3 are heated, and the temperature inside the cleaning chamber 3 is raised during drying to enhance the cleaning / drying effect.

Reference numeral 29 is a water supply nozzle provided above the rear portion of the cleaning chamber 3, and 30 is an electromagnetic water supply valve provided in a water supply pipe 31 connected to the water supply nozzle 29. Cleaning room 3
Water is supplied to the solenoid valve by opening and closing the electromagnetic water supply valve 30.

Similarly, 32 is an intake duct provided from above the cleaning chamber 3 to the rear thereof, and 33 is an intake fan arranged in the intake duct 32, which is an intake port (not shown) provided at the upper end of the front surface of the main body. The air taken in (1) is sent into the cleaning chamber 3 through the inlet 34 provided at the lower part of the rear wall of the cleaning chamber 3.

An exhaust duct 35 is provided above the front part of the cleaning chamber 3, and the exhaust port 3 is provided at the upper end of the front surface of the main body.
6, which is sent to the cleaning chamber 3 by the intake fan 33 and discharges the air circulating in the chamber.

FIG. 2 is an enlarged cross-sectional view of an essential part showing the structure of the lower nozzle 14, and the structure of the lower nozzle 14 will be described in detail below with reference to this drawing.

The lower nozzle 14 is composed of a first arm nozzle 37 and three arm type nozzles of a second arm nozzle 38 and a third arm nozzle 39 which are smaller than the first arm nozzle 37.

The first arm nozzle 37 is rotatably supported by the nozzle shaft 15 at its center in a horizontal direction. One arm 40 of the first arm nozzle 37 extends laterally straight and the other arm 41.
Is bent at the root so that it is lower than one arm 40. A left propulsion injection hole 42 for injecting water in the right rotation direction is provided at the tip of one arm 40 to rotate the first arm nozzle 37 counterclockwise when viewed from above. Further, the rotation shafts 43 of the second and third arm nozzles 38, 39 are formed on the upper surfaces of both arms 40, 41, and the rotation shafts 43 are used for the second and third arm nozzles 38, 39. Also serves as a water pipe to.

The nozzle shaft 15 is provided with a wash water inlet 44 to the first arm nozzle 37, and a cap 45 for preventing the first arm nozzle 37 from coming off is formed at the tip thereof. Is embedded. Further, the cap 45 is formed with an inlet 46 for washing water to the upper nozzle 16.

The second arm nozzle 38 is horizontally rotatably supported by a rotary shaft 43 on one arm 40 side of the first arm nozzle 37, and the third arm nozzle 39 is a first arm nozzle. The other arm 41 of the nozzle 37
It is supported by a rotating shaft 43 on the side so as to be rotatable in the horizontal direction.

The heights of the second arm nozzle 38 and the third arm nozzle 39 are different because the heights of both arms 40 and 41 of the first arm nozzle 37 are different. Is the third arm nozzle 39
Is higher than. The second and third arm nozzles 38 and 39 have the same shape and can be used in common to reduce the manufacturing cost.

The second and third arm nozzles 38, 39
A right propulsion injection hole 47 for injecting water in the left rotation direction is formed at the tip of one arm so as to rotate the second and third arm nozzles 38, 39 clockwise when viewed from above. . Further, on the upper surfaces of both arms of the second and third arm nozzles 38, 39, there is formed an injection hole 48 for cleaning, which is slightly outward and upward.

The rotary shaft 43 is formed with an inlet 49 for washing water to the second and third arm nozzles 38 and 39, and the tip of the inlet 49 is used for the second and third arm nozzles. Caps 50 for preventing the 38 and 39 from coming off are fitted.

Now, the operation in the washing operation of the present dishwasher based on the above construction will be described. First, the water supply nozzle 2
Water is supplied from 9 and the cleaning water is stored at the bottom of the cleaning chamber 3. When the water level detection device 27 eventually detects a predetermined water level, the water supply ends and the cleaning pump 20 and the heater 28 operate.

The cleaning water stored in the bottom of the cleaning chamber 3 is sent to the upper nozzle 16 and the lower nozzle 14 by the operation of the cleaning pump 20 while being heated by the heater 28.

In the lower stage nozzle 14, the first arm nozzle 3
The washing water is sent to 7, and the first arm nozzle 37 rotates counterclockwise by the jetting force from the left propelling jet hole 42. Further, washing water is sent to the second and third arm nozzles 38, 39 via the first arm nozzle 37, and the second and third arm nozzles 38, 39 are moved to the right by the jet force from the right propulsion jet hole 47. While rotating, the second and third arm nozzles 38, 3
The washing water is sprayed from the spray holes 48 of 9 toward the tableware in the upper lower basket 7 to wash the tableware.

At this time, the second arm nozzle 38 is higher than the third arm nozzle 39, and the cleaning water sprayed from the spray holes 48 of the second arm nozzle 38 has a distance between the arm nozzle and the dishes. Because it is short, it hits tableware strongly. On the other hand, the cleaning water sprayed from the spray holes 48 of the third arm nozzle 39 spreads over a wide range of tableware because the distance between the arm nozzle and the tableware is long.

Therefore, by placing it within the range of the second arm nozzle 38, the washing water from the second arm nozzle 38 can surely wash the heavily soiled tableware, and
The washing water from the arm nozzle 39 can evenly wash the dishes in the corners of the lower basket 7.

On the other hand, the upper stage nozzle 16 is attached to the first arm nozzle 37, rotates counterclockwise together with the first arm nozzle 37, and wash water is directed from the jet port 17 toward the dishes in the upper stage basket 6 above. It is sprayed and the dishes are washed.

In this way, when the cleaning is completed, the water in the cleaning chamber 3 is replaced to perform rinsing, and when the rinsing is completed, drainage is performed and then drying is performed.

In drying, the intake fan 33 and the heater 28 are operated, the dry air is sent from the intake duct 32 into the cleaning chamber 3, and the tableware is dried by the dry air heated by the heater 28.

[0043]

According to the construction of the dishwasher of the present invention, the heights of the second arm nozzle and the third arm nozzle are made different,
One arm nozzle has a short distance to the dishes so that the washing water hits the dishes strongly, and the other arm nozzle has a long distance to the dishes so that the washing water spreads over a wide range of dishes. As a result, the dishwashing water can be reliably washed with the washing water from one arm nozzle,
Even the dishes in the corners of the lower basket can be evenly washed with the washing water from the other arm nozzle, and as a result, the washing performance can be improved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an outline of an entire dishwasher of an embodiment of the present invention.

FIG. 2 is likewise an enlarged cross-sectional view of a main part showing the configuration of the lower nozzle.

[Explanation of symbols]

 3 Cleaning Chamber 20 Cleaning Pump (Pump) 37 First Arm Nozzle 38 Second Arm Nozzle 39 Third Arm Nozzle 48 Injection Hole

Claims (1)

[Claims] 1. A washing chamber for accommodating dishes, a first arm nozzle rotatably supported on a bottom surface of the washing chamber in a horizontal direction and rotating by water supply into an arm, and both sides of the first arm nozzle. A second arm nozzle and a third arm nozzle, which are rotatably supported in the horizontal direction on the upper surface of the arm, respectively, and are rotated by water supply into the arm; and the second arm nozzle and the third arm nozzle, respectively. The second arm nozzle is provided with an injection hole toward the tableware and a pump for sending the cleaning water stored in the bottom of the cleaning chamber to the second arm nozzle and the third arm nozzle via the first arm nozzle. And a height of the third arm nozzle are different from each other.