Liquid chemical sprayer

Abstract

The present invention relates to a liquid chemical sprayer comprising: a nozzle cap which is rotatably mounted and installed at a rotation guide of a body; a nozzle head in which a male screw portion and the female screw portion formed at the nozzle cap are screwed and coupled, a nozzle is formed at the front end of a nozzle channel formed to extend forward over a predetermined length, and a guide plate is formed to protrude for assembly to a guide rail formed at a neck that can move forward and backward; a cylindrical valve body in which a non-return valve is installed and a piston for the selective opening and closing of a nozzle channel is formed to protrude forward of the latter;a valve housing formed in a cylindrical structure, fixedly installed at the rear of the nozzle head and forming a valve seat at an internal portion in which the valve body is stably installed; and a motor housing arranged opposite and assembled with the rear of the valve housing so that the rear of the latter is held in a fixed position, in which an air blower module is installed. Fig. 4;

Description

Title of the invention: Liquid chemical sprayer

[0001] The present invention relates to a liquid chemical sprayer and more particularly to a liquid chemical sprayer whereby an amount, ejection direction or the like of liquid chemical can not only be easily adjusted but also, when the ejection of the chemical is paused or terminated, which enables rapid and clean blocking of the dispensed liquid chemical.

[0002] Discussion of Related Art

[0003] A sprayer for ejecting or spraying liquid chemicals such as insecticides, fungicides and disinfectants into the air can be classified in a wide variety of ways depending on the use, the method of ejection and the like.

[0004] The sprayer disclosed in Patent Publication No. 10-1692347 of the Patent Office of the Republic of Korea (sprayer and spray control apparatus) and No. 10-2215252 (air pressure sprayer having heterogeneous valves) was designed so that the liquid chemical is pumped and sprayed by the atmospheric pressure difference generated inside a nozzle while air pressurized by an air blowing fan installed on an inner side of a housing passes through a nozzle cap whose cross-sectional area is rapidly reduced.

[0005] The sprayer according to Korean Patent Publication No. 10-1692347 was designed so that a user can rotate a nozzle cap provided at the front of a housing, so that a spraying amount and direction can be adjusted and the sprayer according to No. 10-2215252 was developed so that when a user rotates a nozzle cap toward a determined location, a flow path is blocked and the spraying of the liquid chemical can be blocked.

[0006] As described above, the applicant has made an effort to develop a sprayer that a user can use easily and conveniently. From this point of view, the applicant intends to develop an improved spraying technology that is convenient to use and has excellent mechanical properties.

[0007] Related Art Document

[0008] Patent document

[0009] (Patent Document 0001) Korean Patent Publication No. 10-1692347 (03.01.2017)

[0010] (Patent Document 0002) Korean Patent Publication No. 10-2215252 (15.02.2021)

[0011] Summary of Disclosure

[0012] Technical problem

[0013] In order to solve the problems described above, one aspect of the present invention provides a liquid chemical sprayer whereby an amount, ejection direction or the like of a liquid chemical can not only be adjusted easily but also, when the ejection of the liquid chemical is paused or terminated, enables the liquid chemical to be blocked quickly and neatly.

[0014] Technical solution

[0015] A liquid chemical sprayer according to one embodiment of the present invention may comprise, in order to achieve the above objective: in a sprayer provided with a liquid chemical tank, on one side of the rear, while a neck having a reduced cross-sectional area is formed at the front of a main body toward the front and is configured to spray the liquid chemical in a chemical tank by inducing an air pressure difference in an inner side of the neck by means of air applied from an air blowing module consisting of an electric motor and an air blowing fan, a nozzle cap having a cylindrical structure, in which an inner cross-sectional area is reduced toward the front and a minimum diameter portion is formed on an inner side of the front,and wherein a female screwing part is formed at a predetermined portion having the same inner diameter, and assembled with an annular rotation guide formed at the neck to form an annular projection at an outer side of a rear end portion capable of being rotated in place relative to the neck; a nozzle head, in which a male screwing part, corresponding to the female screwing part formed at the nozzle cap, is formed, a nozzle is formed at a front end of a nozzle pipeline formed so as to extend a predetermined length forward, and a guide plate is formed, which is projected to be assembled with a guide rail formed at the neck, operable forward and backward relative to the neck; a valve body having a cylindrical shape,wherein a liquid chemical supply pipe is connected at a rear end and a check valve is installed therein, wherein a piston, for selectively opening and closing the nozzle pipeline, is formed at the front thereof; a valve housing formed in a cylindrical structure fixedly installed at the rear of the nozzle head and forming a valve seat at an inner portion in , in which the valve body is stably installed; and a motor housing opposite and assembled with the rear of the valve housing so that the rear of the valve body is kept in a fixed state, in which the air blowing module is installed.

[0016] In the liquid chemical sprayer according to one embodiment of the present invention, a flange surrounding a predetermined portion in the front of the motor housing may be formed at a predetermined portion in the rear of the valve housing, and a nesting hole corresponding to a lock protruding from a motor housing may be formed in the flange.

[0017] In the liquid chemical sprayer according to one embodiment of the present invention, a nesting projection may be formed so as to protrude at a predetermined interval on an outer circumferential surface of the valve body, and a slot corresponding to the nesting projection may be formed at a predetermined interval on the valve seat.

[0018] In the liquid chemical sprayer according to one embodiment of the present invention, the nozzle head may be formed in the form of six tops so that ribs are formed at predetermined angular intervals and the nozzle channel is located in the center and the ribs swirl in air flowing from the rear to the front.

[0019] In the liquid chemical sprayer according to one embodiment of the present invention, a pipe pocket through which the liquid chemical supply pipe is disposed may be formed on one side of an inner portion of the motor housing.

[0020] Advantageous effects

[0021] A liquid chemical sprayer according to the present invention, when a user wishes to block the ejection of the liquid chemical by turning a switch or rotating a nozzle cap in a closing direction thereof, so that spraying is paused or terminated while the chemical is being sprayed, an inlet of a nozzle pipeline is accurately and quickly blocked by a piston and the effect is therefore that rapid pausing or stopping is possible.

[0022] Furthermore, a check valve is installed on an inner portion of a valve body, when a user rotates a nozzle cap in a closing direction and the effect is therefore that a supply of liquid chemical can be not only blocked quickly but also a reverse flow of the liquid chemical can be effectively prevented.

[0023] More particularly, the liquid chemical sprayer according to the present invention is firstly ejected through a chemical discharge hole liquid made in a valve body, secondly it is ejected through a nozzle hole in a nozzle cap and then it is sprayed into a particulate state by a strong air flow passing through the inside of the nozzle cap, so the effect is that spraying in an ultra-fine particulate state can be carried out. Description of Figures

[0024] [Fig-1] is a cross-sectional view showing a portion of a sprayer to which a liquid chemical sprayer according to one embodiment of the present invention is applied.

[0025] [Fig.2] is a cross-sectional view of a main part of a sprayer of liquid chemical product according to one embodiment of the present invention.

[0026] [Fig.3] and

[0027] [Fig.4] are exploded perspective views for the description of the components main parts of a liquid chemical sprayer according to one embodiment of the present invention.

[0028] [Fig.5]

[0029] [Fig.6]

[0030] [Fig.7] and

[0031] [Fig.8] are views describing a process in which a valve body according to a embodiment of the present invention is assembled.

[0032] [Fig.9] and

[0033] [Fig. 10] are views depicting an operating state of a liquid chemical sprayer according to an embodiment of the present invention.

[0034] Detailed Description of Exemplary Embodiments

[0035] In the following, configurations of a liquid chemical sprayer according to one embodiment of the present invention will be described in detail with reference to the accompanying figures.

[0036] Reference 100 in the figures indicates a sprayer according to an embodiment of the present invention.

[0037] In a sprayer 100 according to an embodiment of the present invention, as shown in [Fig. 1], a shape of a neck 112 in which a cross-sectional area is gradually reduced is formed at the front of a main body 110 and a liquid chemical tank 120 is installed at the rear of an inner portion of the main body 100.

[0038] In the liquid chemical sprayer according to one embodiment of the present invention, a method, in which the liquid chemical stored in the liquid chemical tank 120 is pumped and ejected by a pressure difference generated outside and inside a nozzle in a process of to blow air quickly and strongly around the nozzle, is performed. As described above, an air blowing module 130, for forcibly blowing strong wind toward a circumference of the nozzle to generate a large air pressure difference, is installed at the rear of the neck 112. The air blowing module 130 may comprise an electric motor 132 and an air blowing fan 134.

[0039] The neck 112, described above, of the main body 110, is designed to have a structure in which a cross-sectional area decreases toward the front, as shown in the figure. A rotation guide 114, allowing rotation of a nozzle cap 140, to be installed later, is formed to have an annular shape on an inner side of the neck 112 and a guide rail 116, for guiding the forward and backward movements of a nozzle head 150, to be installed later, is formed. An annular assembly groove 118, formed at the rear of the guide rail 116, with a predetermined width, allows stable mounting of a valve housing 170, to be installed later, while a center thereof is maintained.

[0040] The nozzle cap 140 has a structure in which the cross-sectional area decreases toward the front in order to smoothly generate a pressure difference due to air blown by the operation of the air blowing module 130.

[0041] As shown in [Fig. 2], the nozzle cap 140 has a cylindrical structure in which a large diameter portion 140a and a small diameter portion 140b are distinguished by a difference in diameter and is formed between the large diameter portion 140a and the small diameter portion 140b and, at a predetermined portion, an inclined portion 140c is formed whose inner diameter gradually decreases from the large diameter portion toward the small diameter portion. A female screwing portion 142 is formed at a predetermined portion on an inner side of the large diameter portion 140a of the nozzle cap 140 and a minimum diameter portion 144 is formed on an inner side of the small diameter portion 140b.

[0042] More particularly, an annular projection 146 is formed on an end portion of the rear of the nozzle cap 140, assembled to the annular rotation guide 114 formed on the main body 110, so as to protrude outwardly, so that, when the user rotates the nozzle cap 140, rotation is possible on the spot.

[0043] The nozzle head 150 according to an embodiment of the present invention is configured to move forward or backward depending on a direction in which the nozzle cap 140 is rotated. A male screwing portion 152, corresponding to the female screwing portion 142 formed on the nozzle cap (140), is formed at the at a predetermined portion and a nozzle pipe 154, projecting along a predetermined length forward is formed on a central axis. A plurality of nozzle holes 154a are formed at predetermined intervals so that the liquid chemical passing therethrough can be ejected at the front end of the nozzle pipe 154.

[0044] Furthermore, as shown in the figures, a valve hole 156 having a relatively large diameter compared to that of the nozzle pipe 154 at the rear of the nozzle pipe 154 is formed in a predetermined portion.

[0045] Furthermore, a guide plate 158, which is located at the guide rail 116 formed on the main body 110 and guides the linear movement, is formed so as to protrude at the rear of the nozzle head 150, with a square shape. In addition, an anti-rotation protrusion 158a is formed, with a predetermined size, in the upper and lower portions of the guide plate 158.

[0046] As shown in [Fig. 3], the nozzle head 150 includes ribs 150a formed at predetermined angular intervals so that the nozzle channel 154 is disposed in the center. The ribs 150a may be shaped like spinning tops so that a swirl is induced in the air flowing from the rear to the front. It is preferable that the ribs 150a be six in number, formed at 60-degree intervals.

[0047] A valve body 160 according to one embodiment of the present invention enables the chemical to be selectively blocked or allowed to pass through the nozzle line 154. For this purpose, the valve body 160 is formed in the shape of a cylindrical cavity, and a liquid chemical discharge hole 162, through which the liquid chemical passes, is formed at predetermined intervals in the front, and at a location away from the liquid chemical discharge hole 162 by a predetermined distance, a piston 164 is formed to protrude from the front end, and a check valve 166 is installed therein.

[0048] The piston 164 described above has a conical shape, is removably attachable to a front end of the valve body 160, and is molded from a rubber-like material to match an inlet of the nozzle pipe 154 to provide a good airtight seal.

[0049] A pipe connector 160a, to which a liquid chemical supply pipe 122 can be connected, is formed at the rear of the valve body 160. Furthermore, a nesting protrusion 168 is formed, with a protruding structure at predetermined angular intervals on an outer circumferential surface of the valve body 160.

[0050] In the liquid chemical sprayer according to one embodiment of the present invention, the valve housing 170 which enables the valve body 160 mounted by fitting the front end into the valve hole 156 to be stably mounted and installed in the main body 110, is integrally coupled to the front of an engine housing 180 as shown in [Fig.3].

[0051] The valve housing 170 has a cylindrical structure having a predetermined length as shown in FIGS. 4 to 7 and a flange 142 surrounding a predetermined portion at the front of the engine housing 180 is formed at the rear thereof. A fitting hole 172a, corresponding to the latch 182a, formed so as to protrude from the engine housing 180, is formed in the flange 172.

[0052] The lock 182a described above is rotated by a predetermined angle in a state in which the nesting hole 172a is adjusted so that the valve housing 170 and the engine housing 180 are integrally coupled.

[0053] A valve seat 174, in which the valve body 160 can be stably installed, is formed in the valve housing 170 and slits 176 are formed on the valve seat 174 at predetermined angular intervals. The slit 176 is formed at a location and with a size corresponding to the nesting projection 168 of the valve body 160 so that the nesting projection 168 formed on an outer circumferential surface of the valve body 160 can be fitted.

[0054] An annular assembly projection 178, formed to correspond to the annular-shaped assembly groove 118, is formed on an inner side of the neck 112 around a central portion of the valve housing 170.

[0055] Furthermore, a flange seat 182, corresponding to the flange 172 of the valve housing 170, is formed so that the valve housing 170 can be faced and assembled to the front of the engine housing 180, in which the air blowing module 130 is mounted and installed inside. As shown in the figures, a lock 182a, corresponding to the nesting hole 172a, is formed so as to protrude on the flange seat 182.

[0056] When the valve housing 170 and the engine housing 180 are facing and coupled to each other in a state in which the valve body 170 is assembled to the valve housing 170 at the front of the engine housing 180, a stopper 184 is formed so that a rear end of the valve body 160 can be in close contact therewith stably. The stopper 184 has a structure to which the ribs arranged at angular intervals are connected.

[0057] Fixing devices 186, for fixing and installation, are formed on an inner portion of the main body 110, on both side surfaces of the motor housing 180.

[0058] The electric motor 132 and the air blower fan 134 are secured and mounted to the rear of an internal portion of the motor housing 180. A pipe pocket 188, for the stable arrangement of the liquid chemical supply pipe 122 is formed on one side of an inner portion of the motor housing 180.

[0059] In a state in which the above-described valve body 160 is first assembled to the valve housing 170, as shown in [Fig. 6], the valve housing 170 and the engine housing 180 are coupled to each other as shown in [Fig. 7].

[0060] Furthermore, in a state in which the nozzle cap 140 and the nozzle head 150 are coupled to each other, the valve housing 170 is assembled from a rear side of the nozzle head 150, as shown in [Fig. 8]. As described above, in a state in which the nozzle cap 140, the nozzle head 150, the valve housing 170, the valve body 160, and the motor housing 180 are sequentially coupled to form a single assembly, this single assembly is assembled to the neck 112 of the body 110, as shown in [Fig. 2].

[0061] In the following, a state in which the liquid chemical sprayer according to an embodiment of the present invention operates will be briefly described with reference to the attached FIGS. 9 and 10.

[0062] In a state in which a switch 190 of the liquid chemical sprayer according to an embodiment of the present invention is turned on, [Fig. 9] is a view showing a state in which, when a user rotates the nozzle cap 140 to a maximum forward, a front end of the nozzle pipe 154 of the nozzle head 150 and the minimum diameter portion 144, formed on an inner portion of the nozzle cap 140, are closest to each other.

[0063] When the switch 190 of the liquid chemical sprayer is turned on, the air blown by the air blowing fan 134 quickly and strongly passes through the motor housing 180, the valve housing 170, the nozzle head 150 and the nozzle cap 140 by means of the air blowing module 130. More particularly, an inner cross-sectional area of ​​the nozzle cap 140 is quickly reduced, an air pressure difference between the inside and the outside of the nozzle pipeline 154 is generated and this pressure difference is transferred to the liquid chemical tank 120 via the liquid chemical supply pipe 122, so that the liquid chemical is pumped.As described above, when the pumped liquid chemical is transferred to the valve body 160 along the liquid chemical supply pipe 122 and while the liquid chemical passes through the check valve 166 of the valve body 160 and is discharged to the liquid chemical discharge hole 162, a primary spray is performed.

[0064] At this point, because the piston 164 is in an open state spaced from an inlet of the nozzle line 154 by a predetermined distance, the liquid chemical ini initially ejected via the liquid chemical discharge hole 162 of the valve body 160 passes through the nozzle pipe 154 of the nozzle head 150 and then a secondary spray is performed via the nozzle hole 154a formed at the front end.

[0065] As described above, the liquid chemical can be ejected firstly to the nozzle line 154 via the liquid chemical discharge hole 162 of the valve body 160 and the liquid chemical which has passed through the nozzle line 154 can be ejected secondly via the nozzle hole 154a and spraying can be performed using a strong air flow through the inside of the nozzle cap 140 in a particulate state.

[0066] In a state in which the switch 190 of the liquid chemical sprayer according to an embodiment of the present invention is turned off, [Fig. 10] is a view showing a state in which, when a user rotates the nozzle cap 140 to a maximum rearward, an inlet of the nozzle pipeline 154 of the nozzle head 150 is blocked by close contact with the piston 164 disposed at a front end of the valve body 160.

[0067] As described above, when the inlet of the nozzle pipe 154 is blocked, a flow of liquid chemical flowing along the liquid chemical supply pipe 122 is quickly blocked, so that even if a pressure difference remains inside the nozzle cap 140 and the nozzle head 150, blocking of the liquid chemical ejected into the nozzle hole 154a is quickly performed.

[0068] Furthermore, because the check valve 166 is installed inside the valve body 160, the phenomenon of the liquid chemical flowing back to the liquid chemical tank via the liquid chemical supply pipe 122 is avoided at the same time. Therefore, when a user operates the sprayer again, spraying can be performed more quickly.

[0069] In a liquid chemical sprayer according to one embodiment of the present invention, when a user wishes to block liquid chemical ejection by turning off a switch or rotating the nozzle cap 140 in a closing direction so that spraying is paused or terminated while the liquid chemical is being ejected, an inlet of the nozzle pipe 154 is stably blocked by the piston 164 of the valve body 160 and thus enables rapid stopping.

[0070] Furthermore, because the check valve 166 is installed inside the valve body 160, when a user rotates the nozzle cap 140 in a closing direction, the advantage is not only rapid blocking but also effective prevention of backflow of the liquid chemical.

[0071] The above has been described in detail with reference to a configuration and state of operation of the liquid chemical sprayer according to one embodiment of the present invention. These embodiments are included within the technical teachings described in the claims of the present invention. Furthermore, these embodiments are described solely by way of example and should not be construed as limiting the interpretation of the claims of the present invention.

[0072] Description of the benchmarks

[0073] 100: Sprayer 110: Main body

[0074] 112: Col 120: Liquid chemical tank

[0075] 122: Liquid chemical supply pipe 130: Blowing module of air

[0076] 132: Electric motor 134: Air blowing fan

[0077] 140: Nozzle cap 142: Female screwing part

[0078] 150: Nozzle head 152: Male screwing part

[0079] 154: Nozzle pipe 156: Nozzle hole

[0080] 158: Guide plate 160: Valve body

[0081] 162: Liquid chemical discharge hole 164: Piston

[0082] 166: Non-return valve 168: Fitting projection

[0083] 170: Valve housing 172: Flange

[0084] 174: Valve seat 176: Slot

[0085] 180: Engine housing 182: Flange seat

[0086] 190: Switch

Claims

Claims

1. A liquid chemical sprayer comprising: a liquid chemical tank on one side of the rear while a neck having a cross-sectional area is formed at the front of a main body toward the front and adapted to spray a liquid chemical into a chemical tank by inducing an air pressure difference in an inner side of the neck by air applied by an air blowing module consisting of an electric motor and an air blowing fan, a nozzle cap having a cylindrical structure in which an inner cross-sectional area is reduced toward the front and a minimum diameter portion is formed on an inner side of the front, and in which a female screwing part is formed at a predetermined portion having the same inner diameter,and assembled to an annular rotation guide formed at the neck to form an annular projection at an outer side of a rear end portion rotatable in place relative to the neck;, a nozzle head in which a male screwing portion, corresponding to the female screwing portion formed at the nozzle cap, is formed, a nozzle is formed at a front end of a nozzle pipeline formed to extend a predetermined length forward, and a guide plate is formed to protrude to be assembled to a guide rail formed at the neck, capable of moving forward and backward relative to the neck; a cylindrically shaped valve body, in which a liquid chemical supply pipe is connected at a rear end and a check valve is installed inside, in which a piston for selectively opening and closing the nozzle pipeline is formed so as to protrude at the front thereof; a valve housing formed in a cylindrical structure, fixedly installed at the rear of the nozzle head and forming a valve seat at an inner portion in which the valve body is stably installed; and an engine housing arranged opposite and assembled with the rear of the valve housing so that the rear thereof is kept in a fixed state, in which the air blowing module is installed.

2. A liquid chemical sprayer according to claim 1, wherein a flange surrounding a predetermined portion at the front of the engine housing is formed at a predetermined portion at the rear of the valve housing and a fitting hole corresponding to a lock protruding from the engine housing is formed in the flange.

3.

4. A liquid chemical sprayer according to claim 2, wherein, in a state in which the lock is inserted into the nesting hole, the lock is rotated by a predetermined angle so that the valve housing and the motor housing are integrally coupled.

5. A liquid chemical sprayer according to claim 1, wherein a nesting projection is formed so as to protrude at predetermined intervals on an outer circumferential surface of the valve body and a slot, corresponding to the nesting projection, is formed at predetermined intervals on the valve seat.

6. A liquid chemical sprayer according to claim 1, wherein the nozzle head is formed in the shape of six tops so that ribs are formed at predetermined angular intervals and the nozzle channel is located in the center, and the ribs swirl in air flowing from the rear to the front.

7. A liquid chemical sprayer according to claim 1, wherein a pipe pocket through which a liquid chemical supply pipe is disposed is formed on one side of an inner portion of the motor housing.

8. A liquid chemical sprayer according to claim 1, wherein the piston has a conical shape, is made of a rubber-like material and is mounted at the front end of the valve body.

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