KR102685609B1 - Portable ulv spraying device - Google Patents

Abstract

The present invention relates to a portable chemical spray device. In particular, the fan motor 30 sucks air into the inner space of the main air chamber 20 and creates ultrafine particles through the air passage 43 of the two fluid nozzles 40. ) and at the same time injected into the upper space of the chemical solution tank 10 through the air injection pipe 50 to pressurize the chemical solution in the chemical solution tank 10, so that the chemical solution is injected into the chemical solution supply pipe 80 and the inner chemical spray nozzle 45. ) and are discharged to the ultrafine particle generation unit 42, collide with the air discharged from the ultrafine particle generation unit 42, and are pulverized into ultrafine particles and sprayed through the discharge port 44.

Description

Portable ultra-fine particle chemical spray device {PORTABLE ULV SPRAYING DEVICE}

The present invention relates to a portable nebulizer, and particularly to a device for spraying a chemical solution stored in a chemical solution reservoir into ultra-fine particles (ultra low volume).

There is a known portable chemical spray device that atomizes the chemical liquid stored in a chemical liquid storage container and sprays it in a space subject to quarantine or disinfection while being carried and moved for quarantine or disinfection. In the case of quarantine or sterilization by spraying chemicals from such a chemical spray device, in order to increase the quarantine effect, it is necessary to ensure that the chemical sprayed from the chemical spray device is sprayed uniformly over a wider area, and for this purpose, the spray from the chemical spray device is necessary. It is necessary to reduce the particles to ultra-fine particles (ultra low volume) of less than several tens of micrometers.

In this way, if you spray a chemical solution in the form of ultra-fine particles on a target, a small amount can be sprayed uniformly over a wide area, and the chemical solution can be attached only to the target that needs to be sprayed, increasing the chemical spraying efficiency, and the chemical solution can be sprayed on unnecessary areas. Spraying and contamination problems can be prevented.

Meanwhile, conventional chemical spray devices are disclosed in the patent documents below.

KR 10-2292847B KR 10-1844488B The chemical spray device of Patent Document 1 is designed to pump the chemical liquid in the chemical tank 300 to the spray nozzle 600 using a pump 500. When a pump is used in this way, the overall weight of the spray device becomes heavy, making it inconvenient to handle, and there is a disadvantage in that space is required to install the pump inside the spray device case, thereby unnecessarily increasing the volume of the device. In particular, since the pump is corroded by the chemical liquid and breaks down, there is an inconvenience in maintenance such as repairing or replacing the pump. In addition, the chemical spray device of Patent Document 2 is designed to pump the chemical liquid in the liquid case (referring to 'chemical liquid reservoir'. 5) to the spray nozzle 600 using the pump 5, and the spray nozzle through which the chemical liquid is sprayed. (2) It is provided with an airflow guide device (4) composed of a plurality of guide blades (41) and a spiral channel (21) around it. Accordingly, the chemical spray device of Patent Document 2 has the disadvantages described above because it uses the pump 5 like Patent Document 1, and in particular, it is provided with an airflow guide device 4 provided around the spray nozzle 2. Therefore, the flow of the sprayed mixed gas of chemical liquid and air is interrupted by the air flow guide device 4 and the flow rate is lowered, making it difficult to ultrafine the chemical liquid, which has the disadvantage of low chemical spray effect.

Accordingly, the present invention was designed to solve the problems of the prior art described above, and its purpose is to provide a portable ultra-fine chemical spray device that can spray a chemical solution into ultra-fine particles without using a separate power device such as a pump.

Another object of the present invention is to provide a portable ultra-fine chemical spray device that can finely control the spray amount of ultra-fine chemical particles.

The portable ultrafine particle chemical spray device of the present invention to achieve the above object,

a chemical solution tank for storing the chemical solution;

a main air chamber having an internal space, an air intake port on the rear side wall, and an opening on the front side wall;

a fan motor that draws external air into the interior space through the air intake port of the main air chamber and forcibly blows it toward the opening;

It has an inner space whose inner diameter gradually decreases from the inlet to the discharge port, and is coupled to the opening of the main air chamber so as to communicate with the inner space of the main air chamber, so that air sucked into the inner space by the fan motor is passed through the discharge port. an outer air injection nozzle that guides discharge to the outside, and an outer air injection nozzle, which is arranged coaxially along the central axis in the inner space of the tip of the outer air injection nozzle, and is provided with a chemical liquid passage in the central axis direction, and has an outer peripheral surface and the outer air injection nozzle. A two-fluid nozzle consisting of an inner chemical spray nozzle forming an air passage whose cross-sectional area gradually decreases toward the discharge port between the inner walls of the tip of the nozzle;

An air injection pipe that introduces a portion of the air sucked into the inner space of the main air chamber by the fan motor into the upper space of the chemical tank in order to apply pressure to the chemical liquid in the chemical tank, and an air injection pipe provided in the air injection pipe and When the internal pressure of the main air chamber is above a certain pressure, the air injection pipe is opened to introduce air from the main air chamber into the upper space of the chemical tank, and the air injected into the upper space of the chemical tank is the main air. An air injection device consisting of a check valve that blocks backflow into the internal space of the chamber;

a relief valve that controls the pressure of the internal space of the chemical tank to prevent it from exceeding a certain pressure; and

One end is disposed to be immersed in the chemical liquid of the chemical liquid tank, and the other end is connected to the inlet of the inner chemical liquid spray nozzle, and the chemical liquid supply pipe guides the chemical liquid in the chemical liquid tank to be supplied to the inner chemical liquid spray nozzle. .

The present invention is characterized in that it further includes a flow rate control valve that finely adjusts the flow rate of the chemical liquid supplied through the chemical liquid supply pipe toward the inner chemical spray nozzle of the two-fluid nozzle.

The flow control valve is a needle valve that moves the spool screwed to the valve body forward/backward by rotating the handle clockwise or counterclockwise to change the opening cross-sectional area of the hole provided in the valve seat to control the flow rate of the chemical liquid. It consists of

In the two-fluid nozzle, the tip of the outer air spray nozzle extends a predetermined length further outward in the central axis direction than the tip of the inner chemical spray nozzle, so that the chemical liquid discharged from the inner chemical spray nozzle flows into the air reservoir of the outer air spray nozzle. It is characterized in that it forms an ultrafine particle generating unit that generates ultrafine particles by hitting the air flow accelerated through the furnace.

The air injection pipe is characterized by being provided with at least one orifice that reduces the passing flow rate.

The check valve opens the flow path when the internal pressure of the main air chamber is 3 KPa or more, and the relief valve opens the flow path when the internal pressure of the chemical tank is 3 KPa or more, maintaining the internal pressure of the chemical tank at 3 KPa. It is characterized by being

A nozzle hole having a diameter of 0.7 mm to 1.8 mm is provided at the tip of the inner chemical spray nozzle according to the specifications of the fan motor, and the ultrafine particle generating portion is formed to have a length between 6 mm and 10 mm, and the internal pressure in the ultrafine particle generating portion is is characterized in that the pressure is relatively lower than the internal pressure of the chemical tank.

The orifice of the air injection pipe is characterized in that it has a diameter of 0.5 mm to 2.0 mm.

According to the portable ultrafine chemical spray device of the present invention, the chemical solution can be ultrafine simply by adjusting the air pressure and the chemical discharge flow rate without using a separate power device such as a separate pump, and the chemical solution can be sprayed by applying a two-fluid nozzle. The effectiveness of quarantine or disinfection can be increased by ultra-fine spraying.

Figure 1 is an assembled cross-sectional view showing the overall configuration of the ultrafine particle chemical spray device of the present invention.
Figure 2 is an enlarged detailed view of the two-fluid nozzle of Figure 1.
Figure 3 is a detailed view of the air injection pipe that supplies air in the chemical tank and the check valve installed in the air injection pipe in the present invention.
Figure 4 is a partially enlarged detailed view of the relief valve that maintains the pressure in the chemical tank constant in the present invention.
Figure 5 is a cross-sectional view of a needle valve as an example of a flow control valve installed in a chemical liquid supply pipe.
Figure 6 (a) is a photograph showing a state of spraying a chemical solution with the two-fluid nozzle of the ultrafine particle chemical spray device of the present invention in a horizontal state, and (b) is a state of chemical spraying of a chemical spray device according to the prior art. This is a photo showing .

Hereinafter, a preferred embodiment of the portable ultrafine particle chemical spray device of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows an assembled cross-sectional view showing the overall configuration of the ultrafine particle chemical spray device of the present invention. As shown in FIG. 1, the ultrafine particle chemical spray device of the present invention includes a chemical tank 10, a main air chamber 20, a fan motor 30, two fluid nozzles 40, an air injection pipe 50, and a check. It includes a valve 61, a relief valve 70, and a chemical solution supply pipe 80.

The chemical solution tank 10 stores the chemical solution to be sprayed by injecting it through the chemical solution injection port 11, and the chemical solution injection port 11 is opened and closed with a stopper 12. Reference numeral 15 is a filter.

The main air chamber 20 has an internal space, has an air intake port 21 on the rear side wall, and has an opening 22 on the front side wall. A fan motor 30 is installed in the inner space of the main air chamber 20, and the two fluid nozzles 40 are coupled to the opening 22.

As shown in FIG. 2, the two fluid nozzles 40 include an outer air injection nozzle 41 coupled to the opening 22 of the main air chamber 20 and an internal space of the outer air injection nozzle 41. It consists of an inner chemical spray nozzle (45) arranged coaxially along the central axis direction.

The outer air injection nozzle 41 has an internal space whose inner diameter gradually decreases as it moves from the opening 22 toward the discharge port. The inner chemical liquid injection nozzle 45 is arranged coaxially along the central axis in the inner space of the tip of the outer air injection nozzle 41, and is provided with a chemical liquid passage 46 in the central axis direction, and has an outer peripheral surface and an outer surface. An air passage 43 whose cross-sectional area gradually decreases toward the discharge port is formed between the inner walls of the tip of the air injection nozzle 41.

The outer air injection nozzle 41 has an ultrafine particle generating portion 42 at its front end that extends a predetermined length further outward in the central axis direction than the front end of the inner chemical liquid injection nozzle 45.

The fan motor 30 may be of one of two types: an AC type driven by AC power and a BLDC type. The capacity of AC type fan motors is generally used in the range of 600W to 2,600W, and the wind pressure is used in the range of 9KPa to 30KPa. The wind speed varies depending on the size of the fan of the fan motor 30, and the rotation speed of the motor is within the range of 20,000 to 35,000 RPM. BLDC type fan motors are mainly used at high speeds of 40,000 to 100,000 RPM. This is because the capacity of the fan motor cannot be increased. The capacity is 24V, 200W~48V, 600W. Wind pressure of 9KPa to 20KPa is used.

According to the above configuration, when power is supplied to the fan motor 30 to drive the fan motor 30, the fan motor 30 supplies external air to the main air chamber 20 through the air intake port 21. It is sucked into the internal space and discharged toward the discharge port (44) through the air passage (43) of the second fluid nozzle (40). At this time, the flow rate of the air sucked into the internal space increases as it passes through the air passage 43, and the pressure at the discharge port 44 decreases accordingly. In this way, the pressure at the discharge port 44 becomes relatively lower than the pressure in the chemical tank (for example, 3 KPa), and the pressure difference creates the effect of sucking the chemical from the chemical solution supply pipe toward the discharge port.

Meanwhile, as shown in FIGS. 1 and 3, an air injection device 60 is provided for injecting air above a certain pressure sucked into the main air chamber 20 into the upper space of the chemical tank 10. The air injection device 60 includes an air injection pipe 50 that communicates the main air chamber 20 and the upper space of the chemical tank 10, and a check valve 61 installed in the air injection pipe 50. ). The air sucked into the inner space of the main air chamber 20 by the fan motor 30 is discharged toward the discharge port 44 and is also injected into the chemical solution tank 10 through the air injection pipe 50 to generate the chemical solution. Increase the pressure in the upper space of the tank 10.

The air injection pipe 50 is provided with a check valve 61. The check valve 61 opens the flow path of the air injection pipe 50 when the air flowing into the main air chamber 20 has a certain pressure or more, for example, 3 KPa or more, and the main air chamber 20 ) is allowed to be injected into the chemical tank 10, and when the spray device stops operating, the air and chemical liquid injected into the chemical tank 10 are blocked from flowing back into the main air chamber 20.

Additionally, a relief valve 70 is installed in the chemical tank 10. As shown in FIG. 4, the relief valve 70 opens the flow path when the pressure in the upper space of the chemical tank 10 exceeds a certain pressure, preferably 3 KPa, to fill the upper space of the chemical tank 10. The air is discharged to the outside to maintain the pressure in the upper space of the chemical tank 10 at a constant pressure. Accordingly, the discharge pressure of the chemical liquid is maintained uniformly, and the injection force at the nozzle capable of ultra-fine injection is maintained constant.

As shown in detail in FIG. 4, the relief valve 70 is provided with a discharge pipe 76, and a relief valve body 71 is coupled to the outer end of the discharge pipe 76, and the relief valve body 71 An air discharge path 75 is opened, and a diaphragm 72 elastically supported by a spring 73 is provided inside the relief valve body 71, and the upper space of the chemical tank 10 is maintained at a constant pressure. If it is above, for example, above 3KPa, the diaphragm 72 receives the pressure of air and moves against the force of the spring 73 and is separated from the valve seat 74 to form an air discharge passage.

The chemical liquid supply pipe 80 is disposed so that one end is submerged in the chemical liquid tank 10, and the other end passes through the main air chamber 20 and is connected to the inlet of the inner chemical liquid spray nozzle 45.

With the above configuration, the air introduced into the internal space of the main air chamber 20 through the air intake port 21 by the operation of the fan motor 30 flows through the air passage 43 of the second fluid nozzle 40. It flows out toward the discharge port 44 and the flow rate increases as it passes through the air passage 43, and as a result, the pressure in the ultrafine particle generating section 42 becomes lower than the pressure in the upper space of the chemical tank 10. Accordingly, the chemical liquid in the chemical liquid tank 10 is pressurized by the air pressure in the upper space and is supplied into the inner chemical liquid spray nozzle 45 through the chemical liquid supply pipe 80, and is supplied to the ultrafine particle generating unit 42 through the nozzle hole 47 at the tip. ), and collides with the air discharged from the ultrafine particle generation unit 42 through the air passage 43 of the outer air injection nozzle 41 and is pulverized into ultrafine particles, forming ultrafine particles together with the air through the discharge port 44. It is sprayed through.

As shown in FIG. 6, the ultrafine particle chemical spray device of the present invention shows further improved performance in terms of chemical spray amount and spray range compared to the prior art.

Meanwhile, a chemical solution flow control valve 90 for controlling the flow rate of the chemical solution passing through the chemical solution supply pipe 80 is connected to the chemical solution supply pipe 80. As shown in FIG. 5, the flow control valve 90 moves the spool 93 screwed to the valve body 92 forward/backward by rotating the handle 91 clockwise or counterclockwise to control the valve. It consists of a needle valve that finely adjusts the flow rate of the chemical solution by varying the opening cross-sectional area of the through hole 95 provided in the seat 94.

By adjusting the amount of chemical liquid supplied to the inner chemical spray nozzle 45 using the needle valve, the amount of chemical spray of ultrafine particles can be finely adjusted.

10: Chemical tank 11: Chemical injection port
12: stopper 15: filter
20: main air chamber
21: air intake 22: opening
30: Fan motor 40: 2 fluid nozzles
41: External air injection nozzle 42: Ultrafine particle generation unit
43: air passage 44: discharge port
45: Inner chemical spray nozzle 46: Chemical liquid passage
50: air injection pipe 51: orifice
60: Air injection device 61: Check valve
70: relief valve 71: relief valve body
72: Diaphragm 73: Spring
74: valve seat
75: air discharge path 76: discharge pipe
80: Chemical supply pipe 90: Flow control valve
91: handle 92: valve body
93: Spool 94: Valve Seat
95: through hole 96: chemical through hole

Claims (6)

A portable ultra-fine particle chemical spray device,
a chemical tank (10) for storing the chemical liquid;
a main air chamber (20) having an internal space, an air intake port (21) on the rear side wall, and an opening (22) on the front side wall;
A fan motor 30 that sucks external air into the interior space through the air intake port 21 of the main air chamber 20 and forcibly discharges it toward the opening 22;
It has an internal space whose inner diameter gradually decreases from the opening 22 toward the discharge port 44, and is coupled to the opening 22 of the main air chamber 20 to communicate with the internal space of the main air chamber 20, An outer air blowing nozzle 41 that guides the air sucked into the inner space by the fan motor 30 to be discharged to the outside through the discharge port 44, and the tip of the outer air blowing nozzle 41 in the inner space. It is arranged coaxially along the central axis direction, and is provided with a chemical liquid passage 46 in the central axis direction, and between the outer peripheral surface and the inner wall of the tip of the outer air injection nozzle 41, the cross-sectional area gradually increases toward the discharge port 44. A two-fluid nozzle (40) consisting of an inner chemical spray nozzle (45) forming a decreasing air passage (43);
Air that introduces part of the air sucked into the inner space of the main air chamber 20 by the fan motor 30 into the upper space of the chemical solution tank 10 in order to apply pressure to the chemical solution in the chemical solution tank 10. When the internal pressure of the injection pipe 50 and the main air chamber 20 provided in the air injection pipe 50 is above a certain pressure, the flow path is opened to allow air in the main air chamber 20 to flow into the chemical tank ( An air injection device (60) consisting of a check valve (61) that introduces air into the upper space of the chemical tank (10) and blocks the air in the upper space of the chemical tank (10) from flowing back into the inner space of the main air chamber (20). );
a relief valve (70) that controls the pressure of the internal space of the chemical tank (10) to prevent it from exceeding a certain pressure;
One end is immersed in the chemical liquid of the chemical liquid tank 10, and the other end is connected to the inlet of the inner chemical liquid spray nozzle 45 to guide the chemical liquid in the chemical liquid tank 10 to the inner chemical liquid spray nozzle 45. a chemical solution supply pipe (80); and
It includes a flow rate control valve (90) that controls the flow rate of the chemical liquid supplied through the chemical liquid supply pipe (80) toward the inner chemical liquid spray nozzle (45) of the two fluid nozzles (40),
The two-fluid nozzle 40 has a tip of the outer air spray nozzle 41 extending a predetermined length further outward in the central axis direction than the tip of the inner chemical spray nozzle 45, so that the inner chemical spray nozzle 45 It is provided with an ultra-fine particle generating unit 42 that generates ultra-fine particles when the chemical liquid discharged from hits the air flow accelerated through the air passage 43 of the outer air injection nozzle 41,
The flow control valve 90 rotates the handle 91 clockwise or counterclockwise to advance/reverse the spool 93 screwed to the valve body 92, which is provided on the valve seat 94. It consists of a needle valve that adjusts the flow rate of the chemical solution by varying the opening cross-sectional area of the through hole (95),
A portable ultrafine chemical spray device, characterized in that the air injection pipe (50) is provided with at least one orifice (51) that reduces the passing flow rate. delete delete delete According to paragraph 1,
The check valve 61 opens the flow path when the internal pressure of the main air chamber 20 is 3 KPa or more, and the relief valve 70 opens the flow path when the internal pressure of the chemical tank 10 is 3 KPa or more. , A portable ultra-fine particle chemical spray device that maintains the internal pressure of the chemical tank (10) at 3KPa. According to paragraph 1,
A nozzle hole 47 having a diameter of 0.7 mm to 1.8 mm is provided at the tip of the inner chemical spray nozzle 45, and the ultrafine particle generating portion 42 is formed to have a length between 8 mm and 10 mm, and the ultrafine particle generating portion A portable ultrafine particle chemical spray device, characterized in that the internal pressure at (42) is relatively lower than the internal pressure of the chemical liquid tank (10).