JPH06335663A - Overflow type washing device - Google Patents

Abstract

PURPOSE:To provide an overflow type washing device enabling to effectively feed a washing liquid on the whole surface of an object to be washed and enabling to efficiently utilize the washing liquid. CONSTITUTION:This device is provided with a liquid delivery port 11 being in a slit shape with a trumpet form which is wider in the upper part and narrower in the lower part, on a bottom of a washing tank 14, whose upper edge is a fluid delivery port 11a and lower edge is a fluid inflow port 11b, and in which the fluid delivery port 11b is opened at the bottom of the washing tank 14, and which has a loop pipe line 11c in the vicinity of the fluid inflow port 11a in the lower edge, and the flow direction of the washing liquid flowing into the washing tank 14 is periodically changed without utilizing driving power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stores an object to be cleaned in a cleaning tank, continuously or intermittently supplies the cleaning liquid from the bottom of the cleaning tank, and overflows the cleaning liquid from the upper part of the cleaning tank.
The present invention relates to an overflow type cleaning device for cleaning the object to be cleaned.

[0002]

2. Description of the Related Art Conventionally, an overflow type cleaning apparatus of this type supplies a cleaning liquid substantially uniformly from a large number of holes provided on the bottom surface of the cleaning tank, and overflows the cleaning liquid from an overflow mechanism at the upper end of the cleaning tank to wash the cleaning tank. The object to be cleaned contained therein is cleaned.

[0003]

However, in the above-mentioned conventional overflow type cleaning apparatus, since the state of the flow of the cleaning liquid in the cleaning tank is constant, a portion which is always a shadow or a stagnation occurs, and the object to be cleaned is There has been a problem that the cleaning liquid cannot be satisfactorily supplied over the entire area. Further, in many cases, the flow rate to a portion requiring a larger amount of flow resistance that requires cleaning becomes relatively very small, and if a constant flow rate of the cleaning liquid is to be secured in that portion, a large amount of cleaning liquid is required as a whole. There was also the problem that it would be done.

The present invention has been made in view of the above-mentioned problems, and provides an overflow type cleaning device which eliminates the above-mentioned problems, can effectively supply the cleaning liquid to the entire surface of the object to be cleaned, and can efficiently use the cleaning liquid. The purpose is to

[0005]

In order to solve the above problems, the present invention is provided with a cleaning tank 14, and at the bottom of the cleaning tank 14, at least one cleaning liquid supply section for supplying a cleaning solution is provided. In the overflow type cleaning apparatus, in which the cleaning liquid is supplied from the above to the cleaning tank 14, the cleaning liquid is overflowed from the upper portion of the cleaning tank 14, and the object 12 to be cleaned contained in the cleaning tank is cleaned, As shown in FIGS. 1 and 2, the fluid discharge port 11 is characterized in that the flow direction of the cleaning liquid flowing into the cleaning tank 14 is periodically changed without using power.

The fluid outlet 11 is a trumpet-shaped slit having a wide upper portion and a narrower lower portion, and has a fluid outlet 11a at the upper end and a fluid inlet 11b at the lower end, and the fluid outlet 11a is the cleaning tank 14. Is opened at the bottom of the above, and a loop conduit 11c is provided in the vicinity of the fluid inlet 11b at the lower end.

Further, the loop conduit 11c has a structure as shown in FIG.
As shown in FIG. 2, the orifice 18 or the valve 1 capable of adjusting the flow rate or the transmission speed of the fluid flowing through the loop conduit 11c.
It is characterized by having a structure provided with 9.

Further, there are two or more fluid outlets,
The loop conduit 11c is characterized by being connected to each other by a connecting pipe as shown in FIG.

[0009]

According to the present invention, by adopting the above structure, the flow direction of the cleaning liquid in the cleaning tank 14 is changed,
The flow velocity distribution of the cleaning liquid in the cleaning tank 14 fluctuates, and the shadow or stagnation of the flow also moves with the change in the flow direction. Therefore, the cleaning object 12 stored in the cleaning tank 14
It is not possible to provide a place where the supply of the cleaning liquid is extremely small on the surface of the object to be cleaned 12 without moving the.

As an outlet for periodically changing the flow direction of the fluid, a trumpet-shaped slit is provided and a loop conduit 11c is provided in the vicinity of the fluid inlet 11b at the lower end, as shown in FIG. 5 (a). When the main jet flow is biased to the right side of the fluid discharge port 11 due to the Coanda effect, the pressure at the right side port 11c-2 of the loop line 11c becomes equal to that of the loop line 11c.
Is lower than the pressure of the left side outlet 11c-1, so that a part of the fluid in the fluid outlet 11 flows into the left side outlet 11c-1 of the loop conduit 11c along the left side wall of the outlet 11 and the loop conduit 11c-1. Through the right side opening 11c-2 and push the main jet flow to the left. When the main jet flow is pushed to the left side, the Coanda effect is generated between the main jet flow and the left side wall, and the main jet flows to the left side as shown in FIG. 5B. As a result, the same phenomenon as above occurs on the left side, and the main jet flow is biased to the right side again. The phenomenon as described above is repeated, and the flow direction of the fluid flowing out from the fluid discharge port 11 oscillates left and right.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a schematic structure of an overflow type cleaning device of the present invention, FIG. 1 is a front sectional view, FIG. 2 is a side sectional view, and FIG. In the figure, 14 is a cleaning tank, and a plurality of fluid discharge ports 11 are provided at the bottom of the cleaning tank 14. The fluid discharge port 11 is a trumpet-shaped slit having a wide upper portion and a narrow lower portion, and has a fluid discharge outlet 11a at the upper end and a fluid inlet 1 at the lower end.
It is 1b. The fluid discharge port 11a is opened at the bottom of the cleaning tank 14, and a loop-shaped conduit 11c is provided near the fluid inlet 11b at the lower end. The fluid inlet 11b is connected to a cleaning liquid supply pipe 17 that supplies a cleaning liquid.

In the overflow type cleaning device having the above-mentioned structure, the cleaning object carrier 13 containing the cleaning object 12 is placed in the cleaning tank 14, and the cleaning liquid supply pipe 1 is placed in the cleaning tank 14.
By supplying the fluid cleaning liquid from 7 through the fluid discharge port 11, the cleaning liquid fills the cleaning tank 14 and overflows from the overflow mechanism 15 at the upper end thereof.
When this cleaning liquid flows into the cleaning tank 14 from the fluid outlet 11, the flow becomes a flow that oscillates left and right inside the trumpet-shaped fluid outlet 11.

The fluid discharge port 11 is provided in accordance with the number and intervals of the objects to be cleaned 12 so that the fluid discharge port 11a at the upper end thereof is located directly below the object to be cleaned 12 of the object to be cleaned 13. The position guide 16 holds the position of the cleaning target carrier 13 in the cleaning tank 14, and defines the positional relationship between the cleaning liquid supply port and the cleaning target. Further, the bottom portion of the cleaning tank 14 is formed in conformity with the shape of the object carrier 13 to be cleaned, is formed in conformity with the shape of the object carrier 13 to be cleaned, and also serves as a holding mechanism for the carrier, and the cleaning liquid flows around. Without being able to use it effectively.

FIGS. 5A and 5B are views for explaining the flow of the fluid in the fluid outlet 11 as described above. As shown in FIG. 5A, when the main jet M is biased to the right side of the fluid outlet 11 by the Coanda effect,
Since the pressure of the right side port 11c-2 of the loop line 11c is lower than the pressure of the left side port 11c-1 of the loop line 11c, a part of the fluid in the fluid discharge port 11 is along the left side wall of the fluid discharge port 11. It flows into the left side opening 11c-1 of the loop conduit 11c. Then, through the loop conduit 11c, the right side port 11
It flows out from c-2 and pushes the main jet M to the left.

When the main jet M is pushed to the left, a Coanda effect is generated between the main jet M and the left wall, and the main jet M is biased to the left as shown in FIG. 5B. This causes a similar phenomenon to the above on the left side, that is, since the pressure of the left side port 11c-1 of the loop line 11c is lower than the pressure of the right side port 11c-2 of the loop line 11c, the fluid of the fluid discharge port 11 A part is along the right side wall of the fluid discharge port 11 and the right side port 1 of the loop conduit 11c.
It flows into 1c-2. Then, it flows out from the left side opening 11c-1 through the loop conduit 11c and pushes the main jet M to the right,
The main jet again leans to the left. The phenomenon as described above is repeated, and the flow direction of the fluid flowing out from the fluid discharge port 11 oscillates left and right.

If an orifice 18 or a valve 19 is provided in the middle of the loop conduit 11c as shown in FIGS. 6 and 7 and the flow rate of the cleaning liquid passing through the loop conduit 11c is controlled, the Coanda effect is controlled. Thus, the oscillation cycle in the flow direction can be controlled. In addition, by adjusting the length of the loop conduit 11c, it is possible to control the pressure transmission speed and control the oscillation cycle in the flow direction.

The overflow type cleaning device is shown in FIGS.
In the case where the cleaning liquid is constantly flowing from the bottom opening of the object to be cleaned 13 instead of the structure as shown in FIG. Since the object to be cleaned 13 is in the shadow of the object 13 to be cleaned, the size of the object to be cleaned 12 is always small. Further, since it is an overflow type, the flow velocity of the central portion is always small near the surface of the cleaning liquid in the cleaning tank 14, and the cleaning liquid easily stays near the surface center, so that the contaminants desorbed from the object to be cleaned also stay. May reattach when the item to be cleaned is pulled up.

Since the overflow type cleaning apparatus of this embodiment has the configuration shown in FIGS. 1 and 2, the flow direction of the cleaning liquid in the cleaning tank 14 changes periodically, so that the carrier 13 to be cleaned is cleaned. Items to be cleaned 1 that tend to be shadows
The cleaning liquid is also supplied to the peripheral portion of 2, and the supply amount of the cleaning liquid is averaged for each place on the surface of the object to be cleaned 12. Further, since the flow velocity distribution of the cleaning liquid changes, the retention part of the cleaning liquid also moves,
No stagnation occurs at specific places during cleaning. Therefore, there is no place where the supply of the cleaning liquid is specifically reduced, and the possibility of reattachment of contaminants when the object to be cleaned 12 is lifted from the cleaning tank 14 is reduced.

Further, when the loop conduit 11c is provided independently for each fluid outlet 11 as shown in FIG. 3, the pressure distribution in the loop conduit 11c of each fluid outlet 11 is not constant. The cycle in which the flow direction of the cleaning liquid in each fluid discharge port 11 changes varies, but FIG.
By connecting the loop pipes 11c to each other through the connecting pipes 20 as shown in FIG. 5, the pressure distribution in the loop pipes 11c of the respective fluid outlets 11 is synchronized, so that the flow direction of the cleaning liquid from the respective fluid outlets 11 changes. Can be synchronized with each other, and the flow velocity at a specific portion at each moment of cleaning can be increased.

The fluid outlet 11 attached to the bottom of the cleaning tank 14 is a fluid outlet 1 as shown in FIG.
1 may be a separate type in which a predetermined space p is provided between the fluid discharge port 11 and a continuous type in which no space is provided between the fluid discharge port 11 and the fluid discharge port 11 as shown in FIG. Good. Also in this case, although not shown, by connecting the loop conduit 11c and the loop conduit 11c to each other by a connecting pipe, the change in the flow direction of the cleaning liquid from each fluid outlet 11 can be synchronized.

[0021]

As described above, according to the present invention, since the flow of the cleaning liquid flowing into the cleaning tank changes its direction periodically, the following excellent effects can be obtained. (1) The cleaning liquid is effectively supplied to the entire surface of the object to be cleaned, and the cleaning effect is improved. (2) The amount of the cleaning liquid consumed regardless of the object to be cleaned is reduced.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a schematic configuration of an overflow type cleaning device of the present invention.

FIG. 2 is a side sectional view showing a schematic configuration of an overflow type cleaning device of the present invention.

FIG. 3 is an enlarged view of a loop-shaped conduit portion of the overflow type cleaning device of the present invention.

FIG. 4 is an enlarged view of another loop-shaped conduit portion of the overflow type cleaning device of the present invention.

FIG. 5 is a diagram for explaining a flow of fluid at a fluid discharge port.

FIG. 6 is a diagram showing another configuration example of a fluid discharge port.

FIG. 7 is a diagram showing another configuration example of a fluid discharge port.

FIG. 8 is a view showing an arrangement example of fluid outlets of the overflow type cleaning device of the present invention.

FIG. 9 is a view showing an arrangement example of fluid outlets of the overflow type cleaning device of the present invention.

[Explanation of symbols]

 11 Fluid Discharge Port 12 Cleaning Object 13 Cleaning Object Carrier 14 Cleaning Tank 15 Overflow Mechanism 16 Carrier Position Guide 17 Cleaning Liquid Supply Pipe 18 Orifice 19 Valve 20 Connection Pipe

Claims (4)

[Claims] 1. A cleaning tank is provided, and at least one cleaning liquid supply unit for supplying a cleaning liquid to the bottom of the cleaning tank is provided, and the cleaning liquid is supplied from the cleaning liquid supply unit into the cleaning tank to wash the cleaning liquid. In an overflow-type cleaning device that overflows from the upper part of the tank and cleans the object to be cleaned contained in the cleaning tank, the cleaning liquid supply unit changes the flow direction of the cleaning liquid flowing into the cleaning tank without using power. An overflow type cleaning device characterized in that it is a fluid discharge port that changes periodically. 2. A trumpet-shaped slit having a wide upper part and a narrower lower part, the upper end of which is a fluid discharge port,
The overflow according to claim 1, wherein the lower end is a fluid inlet, the fluid outlet is opened to the bottom of the cleaning tank, and a loop-shaped pipe line is provided in the vicinity of the lower fluid inlet. Mold cleaning device. 3. The overflow-type cleaning device according to claim 2, wherein the loop-shaped pipe has a structure capable of adjusting a flow rate or a transmission speed of a fluid flowing through the pipe. 4. The number of fluid outlets is two or more,
The overflow type cleaning device according to claim 2 or 3, wherein the loop-shaped pipes are communicated with each other.