JPS644448Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an electric sprayer, and is equipped with a residual amount detector and an alarm element to detect the remaining amount of the chemical solution in the chemical solution tank. It detects that the chemical solution has decreased to a predetermined amount and notifies the user.

(Prior art) As an electric sprayer used for gardening, etc., there is a known electric sprayer that uses a pump to suck up the chemical solution in the chemical solution tank, sends it to the spray rod, and sprays it on flowers, trees, etc. from the nozzle at the tip of the spray rod. ing. The pumps used in this type of electric sprayer are high-pressure pumps such as gear pumps, so that the chemical solution can be sprayed as high and far as possible. ,
It is designed to feed the chemical solution towards the spray rod.

(Problem to be solved by the invention) However, when the hose that connects the sprayer body and the spray rod is extended long, the chemical liquid inside the chemical tank can be sprayed at a place far away from the sprayer body or on a tree. When the chemical solution runs out, the rotor will idle at high speed under no load until you return to the sprayer body and operate the operation button to stop the pump drive motor, which may cause the rotor to burn out. There were problems such as damage to the pump due to sticking, and air being sucked into the hose and pump, resulting in poor suction, poor pressure delivery, and pulsation during spraying. In addition, the various chemicals mixed into the chemical solution generally have a higher specific gravity than water, and therefore tend to gradually settle to the bottom of the chemical tank. There is a risk that the extremely concentrated chemical solution accumulated in the tank will be sent to the spray rod and sprayed, which may have a negative impact on flowers and trees, or that the precipitated chemical lumps will be delivered, causing the pump to malfunction or the spray rod to become clogged. It was hot.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an electric sprayer that is equipped with a means for detecting when the chemical solution in the chemical tank has decreased to a predetermined amount and notifying the user.

(Means for Solving the Problems) For this purpose, the present invention provides an electric sprayer 1 of this type with a residual amount detector 19 that detects the remaining amount of the chemical solution in the chemical solution tank 2, and a sensor that detects when the chemical solution has decreased to a predetermined amount. The remaining amount detector 19 and the manual switch 12 are connected in series.

(Operation) In the above-described configuration, when the amount of chemical in the chemical tank 2 decreases to a predetermined amount during spraying of the chemical, the remaining amount detector 19 is activated to drive the notification element 22, thereby notifying the user of the fact.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of an electric sprayer, and the electric sprayer 1 consists of a box-shaped chemical liquid tank 2 and a cover case 3 that is detachably attached to the upper part of the chemical liquid tank 2. 4 is a base plate provided on the chemical liquid tank 2, and pedestals 5 and 6 are fixedly installed in the center of the upper surface of the base plate 4, and a motor 7 and a motor 7 are respectively attached to each of the pedestals 5 and 6. A chemical liquid feeding gear pump 8 driven by is installed. Reference numeral 10 denotes a power supply cord, and an outlet 11 is attached to the tip thereof.This cord 10 is connected to the motor 7 via a manual switch 12 provided on one side of the upper surface of the cover case 3.
It is connected to the. Reference numeral 9 denotes a gripping opening opened in the upper part of the cover case 3. Reference numeral 13 denotes a liquid suction pipe installed vertically below the pump 8, and its lower end hangs down to near the bottom of the chemical tank 2. When the switch 12 is operated to drive the motor 7, the pump 8 is activated. starts operation, the chemical solution in the chemical solution tank 2 is sucked up, and is connected to this pump 8,
and a water supply hose 14 extending outside the cover case 3
The water is fed through the hose 14 to a spray rod 15 attached to the tip of the hose 14, and is ejected from a nozzle 15a at the tip of the spray rod 15. 15b is an operation button.

Reference numeral 16 denotes an annular float, which is loosely fitted into the liquid suction pipe 13 so as to be movable up and down, and an annular magnet 17 is installed along the inner peripheral surface of the float. Also, liquid suction pipe 13
A reed switch 18 is installed near the lower end of the switch. The above float 16 and this reed switch 1
Reference numeral 8 constitutes a residual amount detector 19 that detects the remaining amount of the chemical solution in the chemical solution tank 2. When the float 16 descends to the internal position of this reed switch 18 as the liquid level drops, the magnetic action of the magnet 17 is activated. This actuates the reed switch 18 (see also FIG. 2). Reference numeral 20 denotes a bulge formed at the lower end of the liquid suction pipe 13 to prevent the float 16 from coming off.

Reference numeral 21 denotes an electric circuit board disposed on the base plate 4, and a well-known oscillation circuit is wired to this circuit board 21. A buzzer 22 as a notification element is attached to the inner surface of the side wall of the cover case 3, and a sound emitting hole 23 is provided in the side wall of the cover case 3 facing the buzzer 22. FIG. 3 shows an electric circuit for driving this buzzer 22, in which 24 is a power source, 12 is the manual switch, and 19 is the remaining amount detector, and the manual switch 12 and the remaining amount detector 19 are connected in series. It is connected to the.
Therefore, the buzzer 22 emits an alarm only when the switch 12 is in the ON state and the remaining amount detector 19 is activated.

This device has the above-mentioned configuration, and its handling operation will be explained next.

To spray the chemical solution, the spray rod 15 is held and the switch 12 is turned on. This starts the motor 7 and the pump 8, causing the chemical solution in the chemical solution tank 2 to be sucked up by the pump 8 from the lower end of the suction tube 13 and sent to the spray rod 15 through the hose 14, where it is sprayed from the nozzle 15a at the tip of the spray rod 15. While operating the spray rod 15, the chemical solution spraying from the nozzle 15a is sprayed onto trees, etc.
The liquid level in the chemical tank 2 gradually drops as the chemical is sprayed, and the float 16 also gradually drops with the drop in the liquid level.
When the reed switch 1 is lowered to the internal position of 8,
Pump 8 is activated by the magnetic action of magnet 17 built into float 16, which activates oscillator circuit 25 to apply a signal voltage to buzzer 22, which then emits an alarm sound to inform the user that the liquid in tank 2 has run out or is running low. The user then operates switch 12 to stop pump 8. In this way, with this device, when the liquid level drops to a specified level, buzzer 2 goes off.
When an alarm sound is generated from the pump 2, the operation of the pump 8 is stopped, so that the gear built in the pump 8 does not rotate idly and burn out after the chemical solution runs out, and the user can carry out the spraying work with peace of mind.

FIG. 4 shows another embodiment of the present invention, in which 26 is a liquid suction pipe installed vertically below the pump 8, the lower end of which hangs down close to the bottom of the chemical liquid tank 2. A sliding tube 27 is vertically installed on the lower surface of the base plate 4, and the float 16 is loosely fitted into the sliding tube 27 so as to be movable up and down. Further, the reed switch 18 connected to the oscillation circuit 25 is installed at the lower end of the sliding tube 27. Reference numeral 28 denotes a bulge formed at the lower end of the sliding tube 27 to prevent the float 16 from coming off. That is, in the first embodiment, since the liquid suction pipe 13 also served as a sliding pipe for the float 16, there was a weakness in that the reed switch 18 interfered with the suction of the chemical liquid into the liquid suction pipe 13. This device is provided with a sliding tube 27 in addition to the liquid suction tube 26, and the remaining amount detector 19 is provided on the sliding tube 27, which has the advantage that the drug solution can be smoothly sucked into the liquid suction tube 26. There is.

The device according to the present invention can be further modified in various designs. For example, a light emitting element may be provided as a notification element, and the light emitted by the light emitting element may notify the user of a drop in the liquid level, or it may be used as a remaining amount detection means. In addition to the liquid level detection means, for example, weight detection using a storage gauge, detection means based on the amount of light transmitted through the liquid, etc. can be used.

(Effects of the Invention) As explained above, the present invention provides this type of electric sprayer 1 with a remaining amount detector 19 for detecting the remaining amount of the chemical solution in the chemical solution tank 2 and a notification element 22,
Since the remaining amount detector 19 and the notification element 22 are connected in series, when the chemical solution in the chemical solution tank 2 decreases to a predetermined amount during spraying of the chemical solution, the user is notified of this fact. You can perform chemical spraying work with peace of mind.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a perspective view of the electric sprayer, the second figure is a partial side view,
FIG. 3 is an electrical circuit diagram, and FIG. 4 is a partial side view of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Electric sprayer, 2... Chemical solution tank, 7... Motor, 8... Chemical solution feeding pump, 12... Manual switch, 15... Spray rod, 19... Remaining amount detector, 22... Buzzer as a notification element.

Claims (1)

[Scope of utility model registration request] The electric sprayer 1 includes a chemical liquid tank 2, a chemical liquid feeding pump 8 driven by a motor 7, and a spray rod 15 connected to this pump 8. A quantity detector 19 and a notification element 22 for notifying that the chemical solution has decreased to a predetermined quantity are provided, and the remaining quantity detector 1
9 and a manual switch 12 are connected in series.