JPH0353731Y2 - - Google Patents

Description

[Detailed explanation of the invention] 3-1 Industrial application field This invention provides a daytimer on the frame on which the compressor is mounted, and operates an on-off valve such as a solenoid valve that works with the daytimer only for a predetermined period of time. By opening the compressor and releasing the compressed air generated by the compressor into the atmosphere, it is possible to easily start up the compressor without placing an excessive load on the prime mover that drives the compressor, and the on-off valve automatically opens and closes after a predetermined period of time. This relates to a small-volume sprayer that is closed to the ground and allows all of the compressed air to flow to the jet head for spraying work.

3-2 Conventional technology In conventional small-volume sprayers for spraying liquids such as chemicals or water in fields, vegetable gardens, afforestation areas, greenhouses, etc., the sprayer is installed on the machine frame or trolley on which the compressor is mounted. When it is blocked, the spraying from the nozzle is stopped by cutting off or reducing the compressed air generated by the compressor to the nozzle, but this spraying device is a manual sprayer that can adopt a two-way or three-way valve type. He was manipulative.

3-3 Problems to be solved by the invention For this reason, when spraying, the first step is to manually open the spraying pot and all of the compressed air is sent to the jet head to form atomized air for spraying, but when the spraying pot is opened, Since the prime mover for driving the compressor, for example, the electric motor, is at its rated load, if the spreading pot is opened when the compressor is started, the full load will be applied in a short time when the prime mover is started.
For this reason, the prime mover may not start due to brake activation or fuse damage, especially single-phase
There is a high risk of this happening when the power source is 100 volts, and operators are concerned about encountering unexpected accidents before starting spraying work.

In addition, moisture in the high-pressure air may condense in the air pipe that houses the pressure gauge each time it is operated, forming water droplets and accumulating, which may impair the stable and proper pressure display of the pressure gauge. As a countermeasure to this problem, it was necessary to carry out complicated water droplet removal work before starting work.

3-4 Means for solving the problem This idea was proposed in order to solve the problem in view of the problems mentioned above. In the sprayer, an on-off valve operated by the above-mentioned day timer is attached to the middle of the pipe connecting the compressor and the nozzle head, and this on-off valve is configured as a solenoid valve. By opening the on-off valve, which is an electromagnetic valve that works with In addition to reducing the load, the high-pressure air released into the atmosphere carries away and removes water that accumulates in the air pipe, and the on-off valve automatically opens after a predetermined period of time after the prime mover starts. It is blocked and stops the release of compressed air into the atmosphere, and allows the entire amount to flow to the jet head side for spraying work. The purpose of this invention is to provide a small-volume sprayer that prevents the occurrence of a situation in which it cannot be started and that enables spraying work to be performed safely at all times.

3-5 Configuration Hereinafter, one embodiment of this invention will be described with reference to FIGS. 1 to 4. One side wall W (the first A main switch 1, a voltmeter 2, a timer 3 for controlling the operating time of the prime mover M, a pressure gauge 4, an air connection port 5, an on-off valve 6 such as a solenoid valve, and a delay timer (right side wall in Figure 3) are installed on the right side wall in Figure 3.
timer) 7, and also on the side opposite to the side wall W (second
A storage tank T equipped with a stirring electric motor 8, a rotating shaft r, and a rotary blade b is housed and placed in the space s on the right side in the figure, and the liquid sending pipe 9 inserted into the storage tank T is The upper end is communicated with a nozzle N in a jet head J, which will be described later. A wind cylinder 11 with a handle h is mounted on a horizontal frame plate 10 fixed above the center of the underframe F.
A blower 13 is rotatably attached to an electric motor 12 provided inside the wind cylinder 11, and a nozzle N is installed at the edge of the outlet of the blower 13 to form a jet head having a substantially horizontal conical cross section. The jet head J and the compressor C are connected by an air supply pipe 15 with a jet head connecting piece 14 interposed in the middle. Therefore, the pressure gauge 4 and the on-off valve 6 are interposed in the branch pipe 16 branching from the air supply pipe 15, and the on-off valve 6 is operated for a predetermined period of time (usually 5 to 10 minutes) when the main switch 1 is turned on.
It is possible to automatically switch from an open state to a closed state by a delay timer 7 which is activated after a period of time (about 10 seconds) has elapsed. In the figure, 17 is the wheel, 18 is the handle, d is the outlet for driving the blower 13, e is the outlet for the stirring motor 8, i is the orifice, and P is the compressor C.
υ is the liquid in the storage tank T.

3-6 Function/Effect Since this invention has the above-described configuration, the main switch 1 is turned on (ON) to start the prime mover M and drive the compressor C during the spraying work.
However, at this time, the delay timer 7 does not operate for a predetermined period of time (approximately 5 to 10 seconds as described above), so the on-off valve 6 is in an open state, and the compressed air generated by the compressor C is transferred to the on-off valve 6. Since only a small amount of compressed air flows toward the jet head J, liquids v such as chemicals and water are not sprayed. Therefore, since the load of the compressor C is only slightly applied to the prime mover M by releasing the compressed air into the atmosphere, the prime mover M can be easily started, and there is no risk of tripping the breaker or damaging the fuse.
Further, even if the voltage of the power supply drops, the prime mover M can be started.

Then, when a predetermined period of time has elapsed after turning on the main switch 1, the delay timer 7 is activated and the open/close valve 6 is automatically closed, so that the entire amount of compressed air from the compressor C is passed through the air pipe 15. The liquid is sent to the nozzle J side, and mixed with the water-like liquid v sucked from the storage tank T into the nozzle J at the tip of the nozzle N, forming a mist, which is sprayed toward a predetermined object (not shown). The spraying operation is stopped at the end of the operating time of the prime mover M set by the timer 3.

As described above, by attaching the on-off valve 6, which automatically operates from open to closed after a predetermined period of time has elapsed due to the operation of the delay timer 7, to a part of the pipe line communicating with the compressor C, the compressor The prime mover M for driving C is extremely easy to start, and can be started even when the voltage of the power supply drops, making it extremely convenient and safe for users to use, and furthermore, a pressure gauge 4 is installed. Moisture in the high-pressure air condenses and water droplets accumulate in the branch pipe 16 each time it is operated, but
According to the present invention, when starting spraying, compressed air is always released from the on-off valve 6, and at this time, water droplets in the branch pipe 16 are also removed, and water droplets in the branch pipe 16 are also removed. This has the advantage that malfunction of the pressure gauge 4 due to the presence of water in the branch pipe 16 can be avoided, and that it can be handled properly by any person.

[Brief explanation of the drawing]

The drawings are an example of this invention, and Fig. 1 is a piping diagram of the main parts, Fig. 2 is an overall perspective view of the proposed product, Fig. 3 is a front view with the jet head removed, and Fig. 4 is a diagram of the piping. 3
It is a - line arrow view of a figure. C... Compressor, J... Jet head, M... Prime mover for driving the compressor, N... Nozzle, 6... Open/close valve, 7...
...Delay timer, 15...Air pipe, 16...
Branch pipe.

Claims (1)

[Claims for Utility Model Registration] (1) In a small-volume sprayer equipped with a compressor, a jet head, and a delay timer for controlling the flow of compressed air, in the middle of a pipe connecting the compressor and the jet head,
A small amount sprayer equipped with an on-off valve operated by the above-mentioned day timer. (2) The small amount sprayer according to claim 1, wherein the opening/closing valve is configured as a solenoid valve, and is automatically closed after a predetermined period of time has elapsed using a day timer.