JPS62167529A - Tableware washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] i) Industrial application fields FIELD OF THE INVENTION The present invention relates to dishwashers.

(B) Conventional technology This kind of dishwasher has a pump installed separately from the rotary nozzle arm (for example, see Japanese Utility Model Application Publication No. 1980-80764), or an impeller with the pump casing inside the rotary nozzle arm. (for example, Utility Model No. 59-1)
45358) is known. However, the former requires a means to connect the pump and the nozzle arm, making the structure complicated, increasing manufacturing costs and reducing cleaning efficiency. The amount of cleaning water ejected from the upper portion is smaller than that from the peripheral portion, and there is a risk that there will be a difference in cleaning effectiveness between the central upper portion and the peripheral portion.

(c) Problems to be Solved by the Invention The present invention has a simple configuration that increases the pressure of the cleaning water in the nozzle arm, and sprays the cleaning water with a strong jetting force from all upper parts including the central upper part of the nozzle l. The purpose of the present invention is to provide a dishwasher that improves cleaning performance by eliminating uneven cleaning caused by the storage position of dishes by emitting water.

(d) Means for Solving the Problems The dishwasher of the present invention includes, as a washing mechanism, a pump motor provided below the washing tank so that its rotating shaft projects from the bottom of the washing tank into the washing chamber; An impeller that is fully attached to the tip of a rotating shaft, an arm support that is placed below the impeller and is taken into the cleaning tank, and an edge of the lower center opening is connected to the arm support, and an upper center opening is connected to the arm support. a nozzle arm whose edge is rotatably supported on the upper surface of the impeller and has an ejection hole; the impeller has a standing rib around its upper surface periphery; is characterized in that a hanging rib is formed that can be disposed to face the vertical rib.

(Po) Function The nozzle arm is rotatably supported directly by the impeller and the arm support, so the high-speed rotation of the impeller forces the cleaning water directly to the nozzle arm. Since the hanging ribs and the standing ribs face each other on the upper surface of the impeller, a labyrinth effect occurs between these hanging ribs and the standing ribs when the impeller rotates at high speed, preventing pressure reduction in the nozzle arm and preventing the cleaning water from decreasing. The jetting pressure from the nozzle hole is increased to powerfully wash the dishes, and the cleaning water is jetted upward in a circular shape from the gap between the center upper opening edge of the nozzle arm and the top surface of the impeller, cleaning the dishes at one side of the center of the nozzle arm. Also make sure to wash it.

(f) Example (1) is a machine frame of a dishwasher having an opening (3) that can be opened and closed with a top cover (2), and (4) is a washing chamber disposed inside the machine frame (1). This cleaning chamber (4) consists of a synthetic resin cleaning chamber peripheral wall (5) inserted into the opening 3) from above, and a stainless steel cleaning tank (6) attached to the lower part of this peripheral wall. ) and is formed from.

(7) is a cleaning mechanism to be described later, which is disposed at the bottom of the cleaning tank (6). Reference numeral (8) denotes a cleaning mechanism cover that covers the lower part of the cleaning mechanism (7), and is screwed and fixed to a mounting rib (9) extending downward from the bottom of the cleaning tank (6). (10) is a sheathed heater for heating and drying the washing water provided at the bottom of the washing tank (6), (11) is an overflow port provided on the tank wall of the washing tank (6), and (12) is the Peripheral wall (
5) is the water inlet installed.

(13) is a tableware storage rack, and tableware such as plates and cups (X
) is placed and stored, and the peripheral edge portion thereof is removably engaged with a rack engagement step (14) formed protruding from the lower end of the peripheral wall (5), thereby placing the tableware (X) into the washing chamber (4). Store it.

In the cleaning mechanism (7), (15) is a cleaning tank (6).
The pump motor is suspended and fixed by a hanging member (16) below the bottom, and its rotating shaft (17) is connected to the cleaning tank (6).
) through the through hole (18) drilled in the bottom of the cleaning chamber (4).
) protrudes within.

Further, (19) is an impeller that is attached to the tip of the rotating shaft (17), and as shown in FIG. Four blades radiate downward from (19b) (
19c)..., the upper surface of the substrate (19b) is made flat, and impeller side standing ribs (20>) are provided around the upper surface upward from the periphery.

Furthermore, (21) is a mechanical seal for water-sealing the rotating shaft (17), and (22) is this mechanical seal (22).
1), a seal holder (23) is a ground 1 guide attached to the seal holder (22), and these constitute an arm support section (24). As shown in FIG. 4, the seal holder (22) has an insertion hole (22c) formed in the center of the base (22a) with a seal mounting groove (22b) around it, and a base (22a).
Around the periphery, there are three arm screw-fastened state bosses (22d).
... are erected at equal intervals of 120 degrees, and reinforcing ribs (22e) are formed between these vertical bosses (22d) and the base (22a). It is. Further, as shown in FIG. 5, the arm guide (23) has a hollow hanging cylinder (26) installed around the periphery of a disk (23a) having a water intake port (25) in the center. Furthermore, the vertical boss <226) of the seal holder <22>...
A screw hole (28b) is bored at a position corresponding to . In addition, (27> is a cutter blade for crushing leftovers that is completely attached to the lower part of the impeller (19) of the rotating shaft (17>);
(28) is a cutter receiving blade. The seal holder (22) is placed in the cleaning tank 6) so that the center of the mechanical seal (21) coincides with the center of the through hole (18).
The arm guide (23) is fixed to the bottom of the seal holder (22) via the cutter receiving blade (28).
It is integrated by being screwed and fixed to the vertical boss (226>).

In addition, (29) is a nozzle arm with a hollow inside, and the upper wall surface (29a) has a spout hole (3) that spouts cleaning water upward.
0)... is provided with rotational ejection holes (not shown) on both end faces for applying rotational force to the nozzle arm with the ejected cleaning water. The center upper wall surface <29a> of this nozzle arm (29) has a center-toward opening <31> with a diameter (A), and the lower wall surface (29b) has a center lower opening <31> with a larger diameter (B). Each has an opening (32〉),
On the edge of the central upper opening (31), a nozzle side hanging rib <33> having a smaller diameter than the impeller side standing rib (20) is provided downward, and on the edge of the central lower opening (32>) Four latching pieces (34) each having a latching claw (34a) at the lower end that can be hung from the lower end of the hollow hanging tube (26) of the arm guide (23) hang at equal intervals every 90°. are doing. In this nozzle arm (29), the edge of the central lower opening (32) is located around the hollow hanging tube (26>) of the arm guide (23), and the nozzle side hanging rib (33) of the edge of the central upper opening (31) ) is located opposite to the inside of the book 20〉 standing on the side of the impeller.
9) In the state located on the upper surface, the latching claws (34a) of the latching piece (34) are hooked to the lower end of the hollow hanging tube (26), and the impeller (19) is centered. It is rotatably supported. The nozzle side hanging rib (33
) and the impeller side standing rib (20) (C) is approximately 0.
．． By setting the gap (D) between the edge of the central lower opening (32) and the hollow hanging tube (26) to about 1 mm, the nozzle arm (29) is prevented from swinging relative to the arm support (24), and the nozzle Cleaning water is easily spouted in a circular shape from the gap between the upper central opening (31) of the arm (29) and the upper surface of the impeller (19).

(35) is an overflow lubricant that covers the overflow port (11) with a gap, and the sprayed cleaning water is directly directed to the overflow port (11).
) so that it cannot be completely discharged. This is the seventh
As shown in the figure, the screw end part (36a) of the drain pipe (36) connected to the overflow port (11) is connected to the cleaning tank (6).
Step part (37) for mounting the tightening nut (37) to be tightened and fixed to
a), the overflow log gap (35) and the engagement claw (38) on the back side.
It can be detachably attached by engaging the .

With the above configuration, the cleaning water supplied into the cleaning chamber (4) from the water inlet (12) is heated to a predetermined temperature by the sheathed heater (10), and then pumped by the high speed rotation of the impeller (19). From the water intake port (25) of the arm guide (23) on the arm support portion 24) to the nozzle arm (29)
) and is sprayed upward from the spout (30) while rotating the nozzle arm (29>) to wash the dishes (X).At this time, the central upper opening (
31) Washing water is also spouted upward in a circular shape,
Further enhances the cleaning effect. Further, the washing water that reaches a predetermined amount or more is drained from the overflow port (11), and since there is an overflow cover (35), the jetted washing water is not directly drained. When a predetermined washing time has elapsed, the pump motor (15) is stopped, the washing water is drained, and the tableware (X) is dried by energizing the sheath heater (10) for a predetermined time.

Also, since the top surface of the impeller (19) is flat, in the unlikely event that you are washing dishes, you should place the dishes and spoons on the rack (
Even if the impeller falls from 13) to the top surface of 19), they will not be damaged.

In addition, there are a nozzle-side hanging rib (33) and an impeller-side standing rib (20) at the supporting portion between the center upper opening (31) edge of the nozzle arm (29) and the upper surface of the impeller (19), so that the impeller (19) can move at high speed. A labyrinth effect occurs due to the rotation, which prevents pressure reduction in the nozzle arm (29) and maintains a large jetting force of cleaning water from the jetting hole (30).
Improves cleaning effect.

Since the gap (C) between the nozzle side hanging rib (33) and the impeller side rib (20) is larger than the gap (D) between the central lower opening (32) edge and the hollow hanging tube (26), the nozzle arm (29) rotates smoothly without any vibration, and the cleaning water is easily spouted upward in a circular shape along the edge of (31) 1:l above the center.

Furthermore, the central upper opening (31) of the nozzle arm (29)
Since the diameter (B) of the central lower opening (32) is larger than the diameter (A) of the nozzle arm (29), it is easy to attach it to the impeller (19) and the arm support (24). Furthermore, since the opening is large when removed, the inside of the nozzle arm (29) can be easily cleaned.

Further, the nozzle arm (29) has a central upper opening (31).
) edge and the latch claw (34) provided on the edge of the central lower opening (32).
a) Impeller (19) and arm guide (23)
Since the nozzle arm (29) is installed in a loose manner by sandwiching the nozzle arm (29), the nozzle arm (29) does not lift up and come off during cleaning.
The nozzle arm (29) can be easily removed by simply disengaging the nozzle arm (29).

(G) Effects of the Invention According to the present invention, cleaning water is sent directly to the nozzle arm by the rotation of the impeller, and a labyrinth effect is generated between the center upper opening edge of the nozzle arm and the upper surface of the impeller. The pressure inside the arm increases,
To efficiently wash dishes by hitting them with a strong jet force. In addition, all the dishes, including those in the upper center of the nozzle arm, can be thoroughly and reliably washed.

[Brief explanation of drawings]

The drawings all relate to embodiments of the dishwasher of the present invention, with Fig. 1 being a sectional view of the main parts of the washing mechanism, Fig. 2 being an overall sectional view, and Fig. 3 being an overall sectional view.
The figure shows the impeller, (a) is a cross-sectional view, (b) is a back view, and (b) is a view of the seal holder, (b) is a front view.
Figure 5 is a cross-sectional view, Figure 5 is a diagram of the arm guide, (a) is a front view, (b) is a cross-sectional view, Figure 6 is a rear perspective view of the main parts of the nozzle arm, and Figure 7 is a diagram of the overflow opening bone. In the figure, (a) is a cross-sectional view, (
B) is an exploded perspective view of the main parts. (7)...Cleaning mechanism, (6)...Cleaning tank, (15)
... Pump motor, (19) ... Impeller, (2
4)... Arm support part, (29)... Nozzle arm, (31)... Center upper opening, (32)... Center lower opening, (20)... Impeller side standing rib, ( 33)
...Arm side hanging rib.

Claims (2)

[Claims] (1) In a device that uses a washing mechanism to spray washing water onto dishes stored in a washing chamber in a machine frame to wash the dishes, the washing mechanism cleans the dishes so that the rotating shaft protrudes from the bottom of the washing tank into the washing chamber. a pump motor provided below the tank; an impeller mounted on the tip of the rotating shaft; an arm support section disposed below the impeller and attached to the cleaning tank; a nozzle arm whose central upper opening edge is rotatably supported on the upper surface of the impeller and has an ejection hole; A dishwasher characterized in that a lower opening edge is provided with a hanging rib arranged to face the vertical rib. (2) The dishwasher according to claim 1, wherein the gap between the hanging rib and the standing rib is larger than the gap between the central lower opening edge and the arm support.