JPS644449Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an electric sprayer for spraying chemical solutions on trees, etc. The water tank and the chemical solution tank are provided separately, and the water in the water tank is pumped into the spray rod using a pump. The negative pressure generated when the chemical liquid is supplied to the tank causes the chemical liquid in the chemical liquid tank to be sucked into the water supply channel downstream of the bypass section.

(Conventional technology) Conventional electric sprayers used for gardening etc.
A mixture of water and the chemical solution, in which the desired chemical solution is dissolved in water, is stored in a tank, and this mixed solution is fed to a spray rod using a pump, and then sprayed from the spray rod to spray on flowers, trees, etc. There is.

(Problem that the invention aims to solve) For this reason, when the mixed liquid is used up, it is necessary to dissolve the medicinal liquid in water again to prepare the mixed liquid, and when the mixed liquid is left over, the remaining mixed liquid must be prepared. had to be thrown away or kept out of harm's way. In addition, there are various kinds of chemical liquids such as insecticidal liquids and drug spreading liquids, so the desired chemical liquid must be dissolved in water each time depending on the purpose of spraying, and when different types of chemical liquids are mixed, the chemical liquid Because there is a risk that the drug's efficacy may decrease due to chemical changes, the tank should be cleaned after each spraying operation.
It was necessary to ensure that no used chemical solution remained in the tank. In this way, this type of conventional electric sprayer dissolves the chemical solution in water in advance to prepare a mixed solution.
Since this mixed liquid was stored in a tank, there were various problems in use as described above, and for this reason, there was a tendency for it not to be used sufficiently in homes and the like.

Therefore, an object of the present invention is to provide an electric sprayer that can spray a chemical solution while easily mixing the chemical solution with water.

(Means for Solving the Problems) For this purpose, the present invention includes a motor 7, a pump 8 driven by the motor 7, and a spray rod 25 connected to the pump 8. In the electric sprayer 1, a bypass section 30 is provided in the water supply channel between the water tank 25 and the water tank 2, and the water tank 2 A chemical liquid tank 16 is provided separately from the chemical liquid tank 16, and a liquid sending pipe 33 extending from the chemical liquid tank 16 is connected to a water supply channel downstream of the reflux part 30b of the bypass part 30.

(Function) In the above configuration, when the pump 8 is driven to eject the water in the water tank 2 from the spray rod 25, the chemical solution in the chemical tank 16 is sucked into the water supply channel by the negative pressure of the water supply channel and mixed with the water. It is ejected from the spray rod 25. Furthermore, when the spray from the spray rod 25 is stopped while the pump 8 is still driven, the water flows back to the water tank 2 through the bypass section 30. In this case, the liquid sending pipe 33 of the chemical solution tank is Since it is connected to the downstream side of the reflux section 30b, the chemical solution is not sucked up.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 shows an electric sprayer according to the present invention, and Fig. 2 shows a cross section of the main parts.
It consists of a box-shaped water tank 2 and a cover case 3 detachably attached to the water tank 2. 4 is a base plate arranged on the water tank 2;
Pedestals 5 and 6 are fixed on this base plate 4,
A motor 7 and a pump 8 driven by the motor 7 are installed on each of the pedestals 5 and 6, respectively. Reference numeral 9 denotes a grip portion formed at the top of the cover case 3. Reference numeral 10 denotes a power supply cord, one end of which extends outside the cover case 3, an outlet 11 attached to the tip, and a switch 1 provided on one side of the upper surface of the grip portion 9 at the other end.
It is connected to the motor 7 via 2.

Reference numeral 13 denotes a suction pipe installed vertically at the bottom of the pump 8. The suction pipe 13 passes through an opening 14 formed in the base plate 4, and its lower end hangs down to just above the bottom surface of the water tank 2. It sucks up the water a stored inside.

Reference numeral 16 denotes a chemical liquid tank made of a synthetic resin container, which is removably installed in a recess 17 formed in the base plate 4 near the pump 8, and the chemical liquid B is stored inside the tank. There is. 33 is a flexible liquid sending pipe, one end of which is connected to the chemical liquid tank 16.
It is charged deep to the bottom of the tank. A water supply hose 23 extends outside the cover case 3, and a spray rod 25 is connected to its tip. 25a is a nozzle at the tip of the spray rod 25, and 25b is an operation button.

30 is a bypass section connected between the outflow pipe 24 of the pump 8 and the water supply hose 23,
When the spray from the spray rod 25 is stopped, the water a sent by the pump 8 is bypassed and returned to the water tank 2. This bypass section 30 is
The front and back ends of the outflow pipe 24 and the water supply hose 23
A horizontal pipe 30a connected to the horizontal pipe 30a, a reflux section 30b consisting of a vertical pipe installed above the horizontal pipe 30a,
Reflux pipe 30 connected to the side of this reflux part 30b
It consists of c. Horizontal pipe 30a and reflux section 30
A valve hole 30d is formed in the connecting portion b, and a valve body 30e is attached to the valve hole 30d. 30
f is a cap screwed onto the upper end of the reflux part 30b, and a coil spring 30g is interposed between the inner surface of the cap 30f and the valve body 30e;
The valve body 30e is urged downward toward the valve seat 30h by the spring force of the spring 30g. Reference numeral 31 denotes a bypass pipe, one end of which is connected to the reflux pipe 30c, and the other end of which passes through an opening 32 formed in the base plate 4 and hangs down into the water tank 2. The chemical tank 16 is installed in the recess 17 on the base plate 4, and the tip of the liquid sending pipe 33 made of a needle-like tube is connected to the horizontal tube through a small hole 34 made in the reduced portion 301a of the horizontal tube 30a. A small amount is inserted into 30a. The formation position of the small hole 34, that is, the insertion position of the tip of the liquid sending pipe 34 is located at the reflux section 30.
It is downstream of the valve hole 30d of the chemical solution b, and is designed to prevent the mixed liquid of the chemical solution b from flowing into the reflux part 30b and flowing back to the water tank 2. Reference numeral 35 denotes a mesh installed at the rear end of the water supply hose 23, and is provided for stirring and mixing water a and chemical solution b.

In the above configuration, when the pump 8 is driven, the water a in the water tank 2 is sucked up by the pump 8 and flows to the spray rod 25 through the horizontal pipe 30a and the liquid supply hose 23. Due to the generated negative pressure, the chemical solution b in the chemical solution tank 16 is sucked into the horizontal pipe 30a through the chemical solution pipe 33, and the water a and the chemical solution B are sent to the spray rod 25 while being mixed, and are ejected from the nozzle 25a at the tip of the spray rod 25. . Spraying of the mixed liquid can be done by releasing the pressure on the operation button 25b of the spray rod 25 as appropriate.
This is done while occasionally stopping the spouting of the mixed liquid from the horizontal pipe 30a.
The internal water pressure inside increases, and the internal water pressure causes the valve body 30e to
rises against the spring force of the coil spring 30g, and the valve hole 30d opens. Then, the water a sent from the pump 8 is bypassed to the reflux part 30b side,
The water is further refluxed into the water tank 2 through the reflux pipe 30c and the bypass pipe 31. During such a bypass, water a does not flow to the water supply hose 23 side, so the chemical solution b in the chemical solution tank 16 is not sucked into the horizontal pipe 30a, but naturally flows to the bypass pipe 31 side and flows into the water tank 2. There's nothing to do.

(Effects of the invention) As explained above, according to the present invention, there is no need to mix water and chemicals in advance or to clean the chemical tank after spraying, unlike in the conventional method. The chemical solution can be sprayed very easily without running out of the mixed solution or leaving it in excess. Also, the chemical tank 16
The liquid sending pipe 33 is connected to the reflux section 3 of the bypass section 30.
Since it is connected to the downstream side of 0b, when the spray from the spray rod 25 is stopped and the water sucked up from the water tank 2 is returned to the water tank 2 from the bypass part 30, the chemical solution in the chemical solution tank 16 is is sucked up and mixed with water, and does not flow into the water tank 2.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a perspective view of the electric sprayer, and FIG. 2 is a sectional view of the main part. 1... Electric sprayer, 2... Water tank, 7... Motor, 8... Pump, 16... Chemical solution tank, 25
... Spray rod, 30... Bypass section, 30b... Reflux section, 33... Liquid sending pipe, a... Water, b... Chemical solution.

Claims (1)

[Scope of utility model registration request] A motor 7, a pump 8 driven by the motor 7, and a spray rod 25 connected to the pump 8.
A bypass section 30 is provided in the water supply channel between the pump 8 and the spray rod 25 to allow water sucked up from the water tank 2 by the pump 8 to flow back to the water tank 2 when the spray rod 25 stops spraying. In the electric sprayer 1, a chemical liquid tank 16 is provided separately from the water tank 2, and a liquid sending pipe 33 extending from the chemical liquid tank 16 is connected to a water supply channel downstream of the reflux part 30b of the bypass part 30. An electric sprayer that is characterized by: