JP2008006425A - Cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a miniaturized cleaning device with increased productivity by shortening liquid transferring time even with a pump of small capacity, and reduced cost, considering problems in the past cleaning device wherein a long time is needed for transferring cleaning liquid, the productivity is low due to long cleaning tact, a large capacity pump is needed for the purpose of enhancing the productivity, causing enlargement of the device and increase of cost. <P>SOLUTION: In this cleaning device, a supply liquid storing tank 1 storing cleaning liquid supplied to a cleaning tank 2 is installed in the upper part of a cleaning tank 2, and a discharge liquid storing tank 3 storing the cleaning liquid discharged from the cleaning tank 2 is installed in the lower part of the cleaning tank 2. Cleaning liquid A (13) is transferred through pipes 6, 7 by height difference, and liquid is transferred from the discharge liquid storing tank 3 to the supply liquid storing tank 1 by a small capacity pump. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention is a one-tank cleaning apparatus for wet cleaning that cleans an object to be cleaned, such as metal, resin, glass, and electronic parts, for supplying the cleaning liquid to the cleaning tank and discharging it from the cleaning tank in a short time. The present invention relates to a liquid transfer device.

Some conventional one-tank type cleaning apparatuses include a storage tank that supplies a cleaning liquid to the cleaning tank and stores a drained liquid from the cleaning tank, and performs liquid transfer using a pump.

Conventionally, water-based, hydrocarbon-based, halogen-based cleaning agents to remove dirt such as oil, flux, stripping agent, dust, etc. adhering to the surface of the object to be cleaned, such as metal, resin, glass, electronic parts, etc. A wet cleaning method using sapphire is widely adopted. There are three wet cleaning processes: immersion cleaning, rinsing and drying. There are a multi-tank cleaning apparatus that performs each process in an independent tank and a one-tank cleaning apparatus that performs all the cleaning processes in one cleaning tank. In the multi-tank type, the cleaning and transport time for one tank is a cleaning tact, so the cleaning tact is short and the productivity is high. However, a transport device for moving the basket is required, which increases the size of the device and increases the equipment cost. The conventional one tank type cleaning device does not require a basket transport device because all cleaning processes are performed in one cleaning tank, but if each process is not completed, it does not proceed to the next process and the cleaning tact is long. It was. In the immersion cleaning process, the liquid is transferred by a pump for supplying and discharging the cleaning liquid and storing it. The conventional one tank type cleaning device has one liquid storage tank, and the next process cannot be started unless the liquid transfer is completed. There are three processes for transferring the cleaning liquid: supplying, discharging and stocking the cleaning liquid. Since the conventional cleaning device supplies, discharges, and stores the cleaning liquid in one storage tank, the liquid transfer time is proportional to the pump capacity, and a pump with a large capacity is installed to shorten the liquid transfer time. There was a need. The conventional cleaning apparatus uses a small eddy current pump with a capacity of about 0.4 kW, and the flow rate is about 30 L / min. In a general cleaning tank having a capacity of 60 L, it takes 2 minutes to supply the cleaning liquid, 2 minutes to discharge, and 4 minutes to transfer the liquid. If the actual cleaning time required for the immersion cleaning, rinsing and drying cleaning steps is 4 minutes, the cleaning tact takes 8 minutes per basket. Cleaning the Nissan 100 basket requires 13 hours and 20 minutes. The time required for transferring the liquid is 6 hours and 40 minutes, which accounts for a large proportion of the cleaning work time. Therefore, in order to shorten the cleaning operation time, it is necessary to increase the capacity of the liquid transfer pump, which increases the installation space and the equipment cost due to the increase in the size of the apparatus.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to shorten the cleaning tact time by performing cleaning liquid transfer of a single tank cleaning device in a shorter time than a conventional cleaning device without using a pump having a large flow rate. It is an object of the present invention to provide a cleaning apparatus that improves productivity and reduces the size and cost of the apparatus.

Means for Solving the Invention

In order to solve the above-described problems, the cleaning liquid storage tank is separated into a supply tank, a storage tank, and a discharge tank, so that two tanks are configured. A supply liquid storage tank (1) for storing the cleaning liquid A (13) to be supplied to the cleaning tank (2) is installed on the upper part of the cleaning tank (2), and is connected to the valve A (10) by the pipe A (6). A drain liquid storage tank (3) for storing the cleaning liquid B (14) discharged from the cleaning tank was installed in the lower part of the cleaning tank (2), and connected to the valve B (11) and the pipe B (7). Supplying the cleaning liquid to the cleaning tank (2) and discharging it from the cleaning tank (2) using the difference in height between the supply liquid storage tank (1), the cleaning tank (2), and the discharge liquid storage tank (3) Do. For the next immersion cleaning, the cleaning liquid B (14) is transferred from the discharge liquid storage tank (3) to the supply liquid storage tank (1) by the pump (9) and stored. This invention is a washing | cleaning apparatus which consists of the above structure.

The invention's effect

The supply liquid storage tank (1) is installed at the top of the cleaning tank, the drain liquid storage tank (3) is installed at the bottom of the cleaning tank, and the cleaning liquid is transferred to the cleaning tank (2) by transferring the cleaning liquid according to the height difference. Even if power such as a pump is not used for supply and discharge, it is possible only with piping and valves, and the equipment cost can be kept low. The liquid transfer time can be shortened and the cleaning tact time can be shortened by making the pipe 40A or more larger than the conventional apparatus and applying air pressure. The supply liquid storage tank (1) needs to be stocked with the cleaning liquid for the next immersion cleaning, and the liquid is transferred from the discharge liquid storage tank (3) to the supply liquid storage tank (1) by the pump (9). Since it is only necessary to complete the liquid transfer in the time of the next process, steam cleaning and drying process, even if it takes time to transfer the liquid with a small capacity pump of about 0.4 kW with a small flow rate, the cleaning tact will not be prolonged. . Therefore, there is no need for a large-capacity pump, and a compact cleaning device with high productivity can be manufactured at low cost even with a conventional small-capacity pump.

One embodiment of the present invention is shown in FIG. Hereinafter, the present invention will be described in more detail with reference to the drawings.

FIG. 1 shows an example of a single tank type cleaning apparatus provided with a liquid storage tank. This cleaning device is composed of a supply liquid storage tank (1), a cleaning tank (2), a discharge liquid storage tank (3), a distillation tank (4), and a condensing device (5). The supply liquid storage tank (1) is installed at a position higher than the washing tank (2), joined by a pipe A (6), and a valve A (10) is installed. The drain liquid storage tank (3) is installed at a position lower than the cleaning tank (2), joined by a pipe B (7), and a valve B (11) is installed. The supply liquid storage tank (1) and the discharge liquid storage tank (3) are connected by a valve C (12) and a pump (9). The liquid circulation returns from the supply liquid storage tank (1) through the washing tank (2) and the discharge liquid storage tank (3) to the supply liquid storage tank (1). Further, this liquid circulation is repeated. The cleaning apparatus of the present invention has the above configuration.

Immersion cleaning is started by opening the valve A (10) and supplying the cleaning liquid from the supply liquid storage tank (1) to the cleaning tank (2) through the pipe A (6). Since the cleaning liquid is supplied by falling naturally with a height difference, it does not require power from a pump or the like. The pipe size is about 15A to 20A in the conventional apparatus, but the transfer time is shortened by setting it to 25A or more. At this time, by opening the air valve (8) of the supply liquid storage tank (1) and supplying air, it is pushed by the air pressure and the transfer time is further shortened.

20 L of water was put into a 25 L tank, a 40 A valve was connected, and a transfer experiment using a height difference was performed. In the case of the 40A pipe, the time for discharging 20 L of water was 17.2 seconds at atmospheric pressure, and when this was pressurized with an air pressure of 0.5 MPa, it was shortened to 8.5 seconds. This flow rate corresponds to 70 L / min at atmospheric pressure and 140 L / min by air pressurization. In the case of a 60 L cleaning tank, the liquid can be transferred in 26 seconds with a cleaning liquid having a specific gravity of 1. In the case of liquid transfer using a pump in a conventional cleaning device, the flow rate of a generally used pump having a capacity of 0.4 kW is 30 L / min at most. In the case of a cleaning tank with a capacity of 60 L, liquid transfer takes 120 seconds. Therefore, the cleaning apparatus of the present invention shortens the transfer time to 1/2 or less at atmospheric pressure and 1/4 or less by air pressurization of 0.5 MPa as compared with the conventional method.

After the immersion cleaning, the valve B (11) is opened and the cleaning liquid is transferred to the drained liquid storage tank (3) with a height difference through the pipe B (7). This transfer can also reduce the transfer time by applying air pressure.

The cleaning liquid B (14) transferred to the discharged liquid storage tank (3) needs to be transferred to be stored in the supply liquid storage tank (1) in preparation for the next immersion cleaning. Since this liquid transfer has a head, transfer by a pump (9) is required. At this point, since the liquid transfer in the cleaning tank has already been completed, the cleaning process can proceed to the next rinsing process. Since the transfer process from the discharged liquid storage tank (3) to the supply liquid storage tank (1) can proceed simultaneously with the next process, the liquid can be transferred using the time of the next process. Time is not added to the cleaning tact. Rinse and drying time in the next process requires 2 minutes or more in the case of general cleaning, so even a small capacity pump with a capacity of 0.4 kW and a flow rate of 30 L / min can transfer liquids of 60 L or more without extending the cleaning tact. Become.

When washing an object to be cleaned of 100 minutes per day with a cleaning device with a cleaning tank capacity of 60 L and a pump capacity of 0.4 kw, the conventional 1 tank cleaning device requires 4 minutes to transfer the liquid, The washing tact time is 8 minutes for one basket, and 13 hours and 20 minutes are required for 100 baskets. In the cleaning apparatus of the present invention, in the case of a 40A pipe, the liquid transfer takes about 1 minute. When the actual cleaning time is 4 minutes, the cleaning tact for one basket is 5 minutes. The washing time for 100 baskets is 8 hours and 20 minutes, which is significantly reduced by 5 hours compared with the conventional apparatus. This is further shortened by increasing the pipe diameter.

Therefore, the liquid transfer time is shortened by the cleaning apparatus of the present invention, and the productivity is improved by shortening the cleaning tact. Since it is not necessary to increase the pump capacity in order to shorten the cleaning tact, the apparatus can be reduced in size and cost.

When there are multiple cleaning liquids such as pre-cleaning agents and finishing cleaning agents, it can be configured with multiple storage tanks consisting of supply liquid storage tank, cleaning tank, and discharge liquid storage tank according to the number of cleaning liquids. is there. In that case, the piping and the valve are configured to sequentially send the cleaning liquid to the cleaning tank.

It is possible to increase the productivity by using a plurality of cleaning tanks, and supply and discharge the cleaning liquid to and from the cleaning tank by switching the valves sequentially by the configuration of the piping and valves.

In the case of multiple storage tanks and multiple cleaning tanks, the valves are switched sequentially by the combination of pipes and valves, and the supply and discharge of each cleaning liquid to each cleaning tank is repeated, resulting in a compact and highly cleanable and productive product. A cleaning device can be manufactured at low cost.

It is the flowchart which showed the washing | cleaning liquid circulation of this invention implementation.

Explanation of symbols

(1) Supply liquid storage tank, (2) Cleaning tank, (3) Drainage liquid storage tank, (4) Distillation tank, (5) Condensing device, (6) Pipe A, (7) Pipe B, (8 ) Air valve, (9) Pump, (10) Valve A, (11) Valve B, (12) Valve C, (13) Cleaning fluid A, (14) Cleaning fluid B

Claims (4)

In a cleaning apparatus for wet cleaning, a supply liquid storage tank (1) for supplying a cleaning liquid to the cleaning tank (2) is installed on the upper part of the cleaning tank (2), and the discharged liquid receives the discharged liquid from the cleaning tank (2). A cleaning device characterized in that the liquid storage tank (3) is installed in the lower part of the cleaning tank (2). 2. A cleaning apparatus according to claim 1, further comprising means for pressurizing and transferring the cleaning liquid by air pressure to supply and discharge the cleaning liquid. The cleaning apparatus according to claim 1, comprising a plurality of cleaning tanks. The cleaning apparatus according to claim 1, comprising a plurality of liquid storage tanks.

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