JP2600919Y2 - washing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for washing an object to be washed, such as tableware or medical or laboratory equipment.

[0002]

2. Description of the Related Art As one type of washing machine, spray nozzles are arranged at the upper and lower parts of a washing chamber having a tank at the bottom, and the washing liquid in the tank is supplied to each of the spray nozzles through a conduit by a washing liquid circulation pump. What is supplied is disclosed, for example, in JP-A-61-280837.

[0003]

However, in the above-mentioned conventional washing machine, no consideration is given to the shape (configuration) of the conduit, and an ordinary conduit (a conduit having a circular cross section) is employed. For this reason, in order to secure a predetermined amount of flow rate, a conduit having a predetermined diameter must be adopted, a relatively large piping space is required, and this is one of the factors that increase the overall height of the washing machine. .

[0004] The present invention has been made to address the above-described problem, and has a structure in which a piping space for a conduit arranged along an upper wall or a lower wall of a washing chamber is narrowed in a vertical direction.
The purpose is to lower the overall height of the washing machine.

[0005]

In order to achieve the above-mentioned object, according to the present invention, the conduit at a portion disposed along at least one of the upper wall and the lower wall of the washing box is provided.
It had a flat shape that was thinner in the vertical direction than the injection nozzle .

[0006]

[Action and effects of the proposed For this reason, in the present invention, injection
The pipe space required for arranging the conduits can be narrowed in the vertical direction while securing the required flow rate for the injection nozzles in relation to the injection nozzles , thereby reducing the overall height of the washing machine. In addition, the size of the washing machine can be reduced, and the installability of the washing machine can be improved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a household dishwasher according to the present invention. In the dishwasher, a washing box 20 and a washing liquid circulation pump 30 are provided inside an exterior 10.
Is provided. The washing cabinet 20 is formed by joining stainless steel plates (it may be made of resin and may be divided into upper and lower parts), and a dish storage rack 40 is provided inside.
And a pair of upper and lower rotary spray nozzles 3 for cleaning (including rinsing) the dishes 41 stored in the rack 40 with a spray water flow.
1, 32 are provided. In addition, an opening 21 is provided on the front surface of the washing box 20 for inserting and removing the rack 40 with the tableware 41. Note that the opening 21 is opened and closed by a door 11 that is pivotally attached to the cleaning cabinet 20 at a lower end and opened forward.

The spray nozzles 31 and 32 are rotatably mounted on the upper wall 22 and the lower wall 23 of the cleaning chamber 20, respectively, and rotate while being rotated by the pressure of the cleaning liquid supplied through the conduit P from the pump 30. Is sprayed toward tableware 41 in the rack 40. The cleaning solution is
At the beginning of the cleaning process, a predetermined amount is supplied through a supply device (not shown) and is stored in a tank 24 provided at the bottom of the cleaning chamber 20. At the end of the cleaning process, a discharging device (shown in FIG. (Omitted), the water is discharged outside the dishwasher, and when the water level exceeds a specified water level (water level at the time of the cleaning process), the water is discharged outside from the overflow discharge pipe 25 provided on the lower wall 23. It is supposed to be. The cleaning liquid may be supplied by being heated outside of the dishwasher by a heated water heater (not shown) or may be heated by a heater (not shown) in the tank 24.

In this embodiment, as shown in FIGS. 1 and 2, a conduit P for guiding the cleaning liquid from the pump 30 to each of the injection nozzles 31 and 32 is provided.
A pipe P1 connected to the discharge port 30a of the cleaning chamber 20 and disposed along the lower wall 23 of the cleaning chamber 20, a pipe P2 connecting the upper front end of the pipe P1 to the lower injection nozzle 32, and a pipe P1
A conduit P3 connected to the upper part of the rear end and extending upward, a conduit P4 connected to the upper end of the conduit P3 and arranged along the upper wall 22 of the washing box 20, and a lower part of the front end of the conduit P4 and an upper part thereof P5 (having the same configuration as the conduit P2, and the injection nozzle is rotatably mounted on the conduit P5 and is prevented by the clip 39).
The flow rate supplied to the upper injection nozzle 31 is set to be smaller than the flow rate supplied to the lower injection nozzle 32 by a predetermined amount. This embodiment
In the state of the conduit P, the present invention is applied to the conduit P1 and the conduit P4.
It has been implemented.

As shown in FIGS. 2, 3 and 4, the conduit P1 is formed by an upper plate member and a lower plate member into a thin flat shape in the vertical direction.
, A first outlet P1b connected to the conduit P2, and a second outlet P1c connected to the lower end of the conduit P3. The conduit P1 is connected to each injection nozzle 3
It is formed to be extremely thin in the vertical direction as compared with 1, 32
You.

On the other hand, as shown in FIG. 5 to FIG. 7, the conduit P4 is formed in a vertically thin flat shape by the upper plate member and the lower plate member, and is connected to the upper end of the conduit P3. Inlet P4a and outlet P connected to the upper end of conduit P5
4b, the upper end portion of the inflow port P4a has an inclined shape (funnel shape) as shown in detail in FIG. 7, and the upper end portion of the outflow port P4b is slightly upward (to the inside of the pipe). )
It has a protruding shape. The conduit P4 is the same as the conduit P1.
In the vertical direction as compared with each of the injection nozzles 31 and 32
It is formed very thin.

In the embodiment constructed as described above, the conduits P1 and P4 of the portions arranged along the upper wall 22 and the lower wall 23 of the washing chamber 20 are formed in a thin flat shape in the vertical direction. The piping space required for arranging the conduits P1 and P4 can be reduced in the vertical direction while ensuring a high flow rate, whereby the overall height of the dishwasher can be reduced, and the small size of the dishwasher can be reduced. Therefore, it is possible to improve the installation property of the dishwasher.

In this embodiment, the flow rate supplied to the upper injection nozzle 31 is set to be smaller than the flow rate supplied to the lower injection nozzle 32 by a predetermined amount. The injection pressure from
The rotation speed of the injection nozzle 31 is also lower than the rotation speed of the lower injection nozzle 32. Therefore, the inside of the tank 24 and the lower wall 23
The impact force at the time of colliding with the upper surface of the cleaning liquid flowing above is weak, so that rebound is suppressed and undulation is suppressed. As a result, the cleaning solution overflow discharge pipe 2
5 is prevented, and the washing liquid is prevented from flowing out of the machine unnecessarily. The ripples do not allow air to enter the cleaning liquid in a bubble state, and can prevent a decrease in performance due to the suction of air by the pump 30. Tank 24
Floating substances such as garbage floating on the washing liquid flowing inside and on the lower wall 23 do not scatter and adhere to the tableware 41. And the like.

Further, in this embodiment, in the upper flat conduit P4, the upper end portion of the inflow port P4a has an inclined shape, and the upper end portion of the outflow port P4b has a shape protruding slightly upward. Immediately after the end of the process, the cleaning liquid in the conduit P4 is pulled down through the conduit P3, and the cleaning liquid dripped onto the dishes 41 which have been dried (either natural drying or forced drying) after cleaning. There is no problem that the tableware 41 is wet.

In the above-described embodiment, the conduit P at a portion disposed along the upper wall 22 and the lower wall 23 of the washing box 20 is used.
The present invention was carried out by simply setting the first and the fourth P4 to a flat shape. However, as shown in FIGS. When the vortex is actively formed, the rotation of the upper injection nozzle 31 can be increased by the vortex, and the cleaning effect can be enhanced. The rotation direction of the injection nozzle 31 (determined by the shape of the injection port in the injection nozzle 31)
Is counterclockwise as viewed from above, the conduit P3
Experiments have confirmed that it is best to set the rotation direction of the vortex formed in P5 counterclockwise. In addition,
The above-mentioned eddy current cuts off a part of the outlet side of the conduit P4 (or P1) as shown in FIG. 10, and also closes the outlet of the conduit P4 (or P1) as shown in FIG. The same can be obtained even if it is shifted to the side.

In the above embodiment, the flow rate supplied to the upper injection nozzle 31 is lower than that of the lower injection nozzle 32.
12 is set so as to be smaller than the flow rate supplied to the lower wall 23 to suppress the rebound of the cleaning liquid flowing on the lower wall 23 and to prevent the cleaning liquid from scattering and flowing into the overflow drain pipe 25. As shown, a portion 23a of the lower wall 23 near the overflow drain pipe 25
Is reduced by a predetermined amount from the lower wall portion 23b of the normal level to increase the amount of upward projection of the overflow drain pipe 25, and the volume increased by the same portion 23a is reduced by increasing the other portion 23c, thereby defining The washing liquid may be prevented from scattering and flowing into the overflow drain pipe 25 without changing the amount of the washing liquid contained in the washing chamber 20 at the water level.

In the above embodiment, the cleaning chamber 2
0, the conduits P1 and P4 of the portions disposed along the upper wall 22 and the lower wall 23 are formed in a thin shape in a vertical direction so as to reduce the overall height of the dishwasher. It is also possible to implement by making only P1 or P4 a thin flat shape in the vertical direction so as to lower the overall height of the dishwasher. In the above embodiment, the present invention is applied to a household dishwasher. However, the present invention is applied not only to a commercial dishwasher but also to a washing machine for washing medical and laboratory utensils. Can be implemented in the same manner or with appropriate changes.

[Brief description of the drawings]

FIG. 1 is a vertical side view of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view of the dishwasher shown in FIG.

FIG. 3 is a plan view of the lower flat conduit shown in FIG. 1;

FIG. 4 is a side view of the lower flat conduit shown in FIG. 1;

FIG. 5 is a plan view of the upper flat conduit shown in FIG. 1;

FIG. 6 is a side view of the upper flat conduit shown in FIG. 1;

FIG. 7 is an enlarged longitudinal sectional side view of the upper flat conduit shown in FIG. 1;

FIG. 8 is a view showing a modification of the flat conduit.

FIG. 9 is a view showing a modification of the flat conduit.

FIG. 10 is a view showing a modification of the flat conduit.

FIG. 11 is a view showing a modification of the flat conduit.

FIG. 12 is a partial perspective view schematically showing a relationship between a lower wall of a washing room and an overflow drain pipe.

[Explanation of symbols]

Reference Signs List 20 cleaning chamber, 22 upper wall, 23 lower wall, 24 tank, 30 cleaning liquid circulation pump, 31 32 injection nozzle, P conduit, P1, P4 flat conduit.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-90528 (JP, A) JP-A-6-328127 (JP, A) Fully open 1986-151658 (JP, U) Really open 1988 103862 (JP, U) US Patent No. 4536043 (US, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47L 15/42 B21C 37/15

Claims (1)

(57) [Scope of request for utility model registration] An injection nozzle is provided at an upper portion and a lower portion of a washing chamber having a tank at a bottom portion, and a cleaning liquid in the tank is supplied to each of the injection nozzles through a conduit by a cleaning liquid circulation pump. In the cleaning device, the conduit at a portion disposed along at least one of the upper wall and the lower wall of the cleaning chamber has a flat shape that is thinner in a vertical direction as compared with the injection nozzle. .