Atomization spraying device and atomization spraying method

Abstract

The invention discloses an atomizing spraying device and an atomizing spraying method, and belongs to the technical field of atomizing spraying. According to the atomization spraying device, a heating pipe is installed in a shell, the heating pipe is communicated with a spraying head, the heating pipe comprises a wide-diameter pipe and a coil pipe, the wide-diameter pipe is of a straight pipe structure, and the inner diameter of the wide-diameter pipe is not smaller than two times of the inner diameter of the coil pipe; the wide-diameter pipe is sleeved with the coil pipe, the tail end of the wide-diameter pipe is close to the combustion mechanism, and a liquid inlet in the tail end of the wide-diameter pipe is communicated with a liquid outlet of the coil pipe. The distance between the tail end of the wide-diameter pipe and the end face of the combustion mechanism is not smaller than 15 mm, and a fuel injection area is formed. According to the scheme, the coil pipe with the small pipe diameter is combined with the straight pipe with the large pipe diameter, on the basis that atomization is achieved, scaling and blocking of the pipeline are delayed, and the better using effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of steam sprayers, and more specifically to an atomizing spray device and an atomizing spray method, which are used for heating liquid to form steam and achieving an atomizing effect after spraying. Background Art

[0002] Steam sprayer is a small atomizing spray device that uses the heat energy generated by fuel combustion to heat the liquid in the coil, turning the liquid into high-temperature and high-pressure gas, which is atomized when it is sprayed out of the nozzle. It can be used in the fields of spraying pesticides and steam cleaning.

[0003] When using a steam sprayer, the liquid medium used is mostly water, or some agents that facilitate volatilization are added to the water to form an auxiliary agent, the main component of which is still water. For steam sprayers, water is mostly obtained from ordinary water sources, such as tap water, well water, and river water, which contain a large amount of impurities. After high-temperature heating, substances such as calcium and magnesium ions in the steam will precipitate and adhere to the surface of the pipe, thereby forming scale and clogging the pipe.

[0004] For example, a steam sprayer solution disclosed in patent ZL2023231766242 has a structure as follows Figure 1 As shown, there is a coil in the combustion chamber, the head end of which is connected to the external auxiliary agent pipe. After being surrounded by the coil, the tail end passes through the inside of the coil to form a straight pipe section and is connected to the nozzle at the outlet. In the field of sprayers, the diameter of the coil is generally around 3mm. If it is too large, it will affect its heat absorption effect, but this kind of pipeline is easy to be blocked.

[0005] In other fields, such as some steam generators and boilers, large-diameter coils can be used. Partial blockage will not affect the overall use, and the cleaning frequency is low. However, for steam sprayers, if the pipe diameter is increased, the overall volume will become larger, greatly increasing the requirements for the liquid supply pump and not conducive to handheld operation. More importantly, in order to ensure the atomization effect, the flame intensity must be increased, which will lead to a large amount of fuel consumption for the sprayer on the one hand, and on the other hand, the shell surface temperature of the steam sprayer will be higher, which will cause greater safety hazards when used in agriculture; it is also impossible to operate it by hand.

[0006] Based on the current situation, in order to extend the service life of the steam sprayer, it is necessary to regularly use chemical reagents to clean the pipeline and eliminate the scale inside the pipeline. Therefore, how to avoid the blockage of the steam sprayer pipeline is still a problem currently faced. Summary of the invention

[0007] 1. Technical problem to be solved by the invention The purpose of the present invention is to overcome the problem of easy clogging of coils in the prior art, and to provide an atomizing spray device and an atomizing spray method. This solution combines a coil with a smaller diameter with a straight pipe with a larger diameter, and on the basis of achieving atomization, delays the scaling and clogging of the pipeline, and has a better use effect.

[0008] 2. Technical solution In order to achieve the above object, the technical solution provided by the present invention is: The invention discloses an atomizing spray device, comprising: a combustion mechanism for providing flame for burning fuel, a shell, a heating tube and a nozzle, wherein the rear end of the shell is closed and connected with the combustion mechanism, and the front end of the shell is provided with a smoke exhaust channel, and the flame generated by the combustion mechanism burns in the shell.

[0009] The heating tube is arranged in the shell, including a wide-diameter tube and a coil; wherein the coil is a spiral structure, and extends spirally along the axial direction of the shell; the wide-diameter tube is sleeved in the coil in the form of a straight tube, and the liquid inlet at its tail end is connected with the liquid outlet of the coil; the inner diameter of the wide-diameter tube is not less than 2 times the inner diameter of the coil; the distance between the tail end of the wide-diameter tube and the end face of the combustion mechanism is not less than 15mm, forming a fuel injection area; the nozzle is connected to the head end of the wide-diameter tube, and the high-pressure medium is sprayed out by the nozzle to form atomized particles.

[0010] Furthermore, the inner diameter of the coil is 3.8-6.8 mm, and the inner diameter of the wide-diameter tube is 2.5-4.8 times the inner diameter of the coil.

[0011] Furthermore, the inner diameter of the wide-diameter tube is 14-22 mm.

[0012] Furthermore, at the tail end of the coil, a radial distance between the coil and the shell is no more than 8 mm.

[0013] Furthermore, at the rear end of the coil, the spacing between the spiral ring surrounded by the coil and the wide-diameter pipe is not less than 4 mm, forming a flame channel for guiding the flame.

[0014] Furthermore, the pipes at least on one side of the rear end of the coil are closely arranged; the length of the interval where the coil is closely arranged is L, and the length L is not less than 1 / 3 of the length of the coil.

[0015] Furthermore, the nozzle is detachably mounted on the head end of the wide-diameter pipe, the end of the shell has a flame cover plate, and the wide-diameter pipe penetrates the flame cover plate, so that the nozzle can be connected to the wide-diameter pipe from the outside of the flame cover plate.

[0016] Furthermore, the tail end of the wide-diameter pipe adopts an interface pipe structure, and the inner diameter of the interface pipe is smaller than the inner diameter of the wide-diameter pipe, so that the wide-diameter pipe is connected to the nozzle through a smaller interface.

[0017] Furthermore, the interface pipe has an internal thread, and the depth of the thread in the axial direction is not less than 4 mm.

[0018] Furthermore, the head end of the coil passes through the flame cover plate, and the flame cover plate is removed, so that the wide-diameter tube and the coil can be taken out at the same time.

[0019] Furthermore, the nozzle includes a connector and a nozzle, the connector is connected to the wide-diameter pipe in a threaded manner; the nozzle has a variable diameter structure to change the flow rate of the medium to achieve atomization.

[0020] Furthermore, the nozzle is provided with a medicine nozzle, which intersects with the nozzle channel so that the medicine and the steam medium can be mixed.

[0021] Furthermore, the combustion mechanism is coaxially arranged with the shell, and an oil injection port is arranged on the end surface of the combustion mechanism facing the shell. In cross-sectional projection, the oil injection port is located in the spiral ring of the coil.

[0022] Furthermore, a fan is provided on a side of the combustion mechanism facing away from the shell, and the fan, the combustion mechanism and the shell are located on the same center line.

[0023] An atomizing spraying method of the present invention adopts an atomizing spraying device for atomization. The atomizing spraying device is configured to have a combustion mechanism, a shell and a nozzle. A heating tube is installed in the shell, and the heating tube is connected to the nozzle. The combustion mechanism sprays flame into the shell to heat the heating tube.

[0024] The heating tube is configured to include a wide-diameter tube and a coil. The tail end of the wide-diameter tube is close to the combustion mechanism, and the liquid inlet at the tail end of the wide-diameter tube is connected to the liquid outlet of the coil. The liquid medium is first quickly heated in the coil and then enters the wide-diameter tube for further heating and vaporization.

[0025] The inner diameter of the wide-diameter tube is not less than twice the inner diameter of the coil. The inner cavity of the wide-diameter tube forms a larger volume space, so that there is a large pressure difference between the liquid inlet and the inner cavity of the coil, and the pressure in the inner cavity is greater than the external air pressure, so that the liquid medium is atomized when sprayed out from the nozzle.

[0026] Furthermore, an annular flame channel is arranged between the spiral ring of the coil and the wide-diameter tube; the inner diameter of the coil is 4.0-6.8 mm, and the inner diameter of the wide-diameter tube is 2.5-4.5 times the inner diameter of the coil, so that the wide-diameter tube forms an expansion and pressure reduction space relative to the coil.

[0027] Furthermore, the nozzle can be detachably connected to the wide-diameter pipe in a threaded manner.

[0028] Furthermore, a flame cover plate is provided at the head end of the shell, the wide-diameter pipe is fixedly connected to the flame cover plate, and an interface pipe is formed outside the flame cover plate. The interface pipe is provided with a threaded connection port smaller than the inner diameter of the wide-diameter pipe for connecting the nozzle.

[0029] 3. Beneficial effects Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The atomizing spray device of the present invention changes the traditional single-tube heating method to double-tube heating. The larger inner cavity of the wide-diameter tube provides space for liquid vaporization, thereby effectively releasing the high pressure formed in the narrow space, and then a larger pressure difference can be formed at both ends of the coil, accelerating the flow rate of the liquid in the coil, and the crystals precipitated in the coil can be continuously washed into the inner cavity of the wide-diameter tube, and many precipitated particles can be sprayed out from the nozzle. Therefore, the blockage in the coil can be well alleviated. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the existing coil; Figure 2 A schematic diagram of an embodiment of an atomizing spray device; Figure 3 A schematic diagram of an implementation of a heating tube; Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of the middle heating tube; Figure 5 The schematic diagram of the coil is a closely arranged pipe with equal diameter; Figure 6 This is a schematic diagram of a combination implementation method of a wide-diameter pipe using two-end pipes; Figure 7 A schematic diagram of a connection implementation method between a nozzle and a wide-diameter pipe; Figure 8 It is a schematic diagram of another connection implementation method of the nozzle and the wide-diameter pipe; Fig. 9 A schematic diagram of an implementation of a nozzle in a spray head.

[0031] Explanation of the symbols in the schematic diagram: 11. Combustion mechanism; 12. Fan; 2. Shell; 3. Heating tube; 31. Wide-diameter tube; 311. Inner cavity; 312. Cover plate; 313. Interface tube; 32. Coil; 321. Auxiliary agent tube; 4. nozzle; 41. connector; 42. nozzle; 43. medicine nozzle; 5. Handle. DETAILED DESCRIPTION

[0032] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0033] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0034] Combination Figure 2 This embodiment provides an atomizing spray device, including a combustion mechanism 11, a shell 2 and a nozzle 4. The combustion mechanism 11 is used to burn fuel and provide flames. The rear end of the shell 2 is closed and connected to the combustion mechanism 11. The front end of the shell 2 is provided with a smoke exhaust channel. The flame generated by the combustion mechanism 11 burns in the shell 2 to provide the heat required for atomization. The smoke after combustion is discharged from the smoke exhaust channel.

[0035] A heating tube 3 is arranged in the shell 2, which includes a wide-diameter tube 31 and a coil 32; wherein the coil 32 is a spiral structure, and spirally extends along the axial direction of the shell 2. The wide-diameter tube 31 is sleeved in the coil 32 in the form of a straight tube, and the liquid inlet at its tail end is connected to the liquid outlet of the coil 32; the inner diameter of the wide-diameter tube 31 is not less than twice the inner diameter of the coil 32; the distance between the tail end of the wide-diameter tube 31 and the end face of the combustion mechanism 11 is not less than 15 mm, forming a fuel injection area.

[0036] The heating tube 3 is connected to the nozzle 4, and the heated liquid medium is transported to the nozzle 4 for spraying. The combustion mechanism 11 here is generally a fuel mechanism, and air is supplied to the combustion mechanism 11 through the fan 12, and the fan 12 can be located at the side or coaxially arranged with the combustion mechanism 11. The ignited flame burns in the shell 2 to heat the heating tube 3. The liquid medium is first quickly heated in the coil 32, and then enters the wide-diameter tube 31 for vaporization, and then sprayed out through the small-diameter nozzle 4 to form an atomization effect.

[0037] For the liquid medium inlet pipeline, pumping pipeline and air supply structure, etc., reference can be made to the existing steam sprayer structure.

[0038] Combination Figure 3In one embodiment shown, the coil 32 is a spiral structure formed by a pipe wrapped around in circles, and it extends in a spiral along the axial direction of the shell 2. The wide-diameter pipe 31 is a straight pipe structure, which is sleeved in the coil 32, and its tail end is close to the combustion mechanism 11. The liquid inlet at the tail end of the wide-diameter pipe 31 is connected to the liquid outlet of the coil 32. The wide-diameter pipe 31 is a straight pipe structure relative to the spiral form of the coil 32. The wide-diameter pipe 31 is a straight pipe structure as a whole, and its surface is not required to be the same size. There can be local changes. For example, the wide-diameter pipe 31 can be a pipe structure including two ends with different diameters, and the two sections of the pipe are coaxially arranged.

[0039] Combination Figure 4 , which shows Figure 3 Schematic diagram of the cross-sectional structure. In the specific implementation, the inner diameter of the wide-diameter tube 31 is not less than twice the inner diameter of the coil 32. For example, the existing coil 32 with an inner diameter of about 3mm is used, and the inner diameter of the coil 32 is selected to be 3.5mm. The inner diameter of the wide-diameter tube 31 can be 12mm or 15mm. In some embodiments, the coil 32 can be larger in size, such as about 6mm, so as to reduce the thermal efficiency. The inner diameter of the wide-diameter tube 31 is about 20mm, so as to avoid clogging.

[0040] In some embodiments, the inner diameter of the coiled tube 32 is 3.8-6.8 mm, for example, 5 mm, 6 mm. Under the same flame intensity, the use of a larger inner diameter tube will inevitably reduce its heating efficiency relative to an inner diameter tube of about 3 mm, thereby delaying the vaporization time of the liquid medium, so that it can be matched with the wide diameter tube 31.

[0041] Furthermore, in some embodiments, the inner diameter of the coil 32 is 3.8-6.8 mm, and at the same time, the inner diameter of the wide-diameter tube 31 is 2.5-4.8 times the inner diameter of the coil 32, for example, the inner diameter of the wide-diameter tube 31 is 10-25 mm.

[0042] In some embodiments, the inner diameter of the wide-diameter tube 31 can be limited to 14-22 mm, such as 16 mm or 18 mm, and can be controlled within 4 times the inner diameter of the coil 32. The thickness of the wide-diameter tube 31 is generally within 0.8-1.8 mm, and can be considered to be within this range unless otherwise specified.

[0043] With this solution, the larger inner cavity of the wide-diameter tube 31 provides space for liquid vaporization, thereby effectively releasing the high pressure formed in the narrow space, and then forming a greater pressure difference at both ends of the coil 32, accelerating the flow rate of the liquid in the coil 32, and the crystals precipitated in the coil 32 can be continuously washed and brought into the inner cavity 311 of the wide-diameter tube 31, and some fine particles can be sprayed out from the nozzle 4. Therefore, the blockage in the coil 32 can be well alleviated.

[0044] That is to say, this solution changes the existing scale cleaning method. The existing technology uses chemical reagents for cleaning when the steam sprayer is not working; while this solution reduces the possibility of scale deposition when the steam sprayer is working, thereby achieving self-dissolution of scale.

[0045] Based on this structure, in one embodiment, the nozzle 4 can be directly welded to the wide-diameter pipe 31 as an integral structure. In the wide-diameter pipe 31, due to the large diameter of the pipe, the presence of some scale does not affect the operation of the device. When there is a lot of scale, a faster flow rate will flush out some of the scale and spray it out.

[0046] Regarding the position structure of the wide-diameter tube 31, it is required that the distance between the tail end of the wide-diameter tube 31 and the end face of the combustion mechanism 11 is not less than 15 mm, so as to form a fuel injection zone and guide the flame. The distance can be controlled within the range of 15 to 45 mm, such as 20 mm, 28 mm, and 35 mm. During operation, the liquid medium is initially heated in the coil 32, and after entering the wide-diameter tube 31, a large amount of liquid is vaporized after further heating, and then sprayed to the outside through the nozzle 4 to form an atomization effect. At the tail end position, the liquid outlet of the coil 11 can be connected to the end face of the wide-diameter tube 31. More preferably, the liquid outlet of the coil 11 is connected to the tail end side wall of the wide-diameter tube 31, so as to facilitate leaving the injection zone.

[0047] In the existing coil structure, the small diameter of the tube will not affect the combustion of the flame. In the present embodiment, the wide-diameter tube 31 has a large diameter, which will block the fuel injected by the combustion mechanism 11. If the distance to the end face of the combustion mechanism 11 is close, a large amount of injected fuel will directly hit the end face of the wide-diameter tube 31, forming oil droplets concentrated at the tail end, reducing the completeness of the combustion. In addition, the flame will be injected radially, causing the surface temperature of the shell to rise and become inoperable. By forming a certain distance, the impact on the fuel injection is reduced, allowing the flame to burn in the spiral ring, thereby increasing the heat intensity.

[0048] In some embodiments, at the tail end of the coil 32, the radial spacing between the coil 32 and the shell 2 is no more than 8 mm. In order to improve the thermal efficiency of the existing coil, the flame needs to surround the pipe of the coil 32, so there will be a larger radial spacing between the coil 32 and the shell 2 for the flame to circulate. In this embodiment, it is hoped that the flame heats the wide-diameter pipe 31 as much as possible while reducing the thermal efficiency of the coil 32. Therefore, the radial spacing between the coil 32 and the shell 2 is controlled to be no more than 8 mm, and can be further limited to within 5 mm, so that the flame can burn and circulate in the spiral ring as much as possible.

[0049] An annular flame channel is formed between the spiral ring surrounded by the coil 32 and the wide-diameter tube 31, and the radial dimension of the flame channel is not less than 4 mm, so as to ensure sufficient flame to heat the wide-diameter tube 31. The radial dimension of the flame channel can be preferably controlled to be 6-14 mm.

[0050] For the flame channel, at least the coil 32 is closely arranged between the pipes on one side of the head end, for guiding the flame into the flame channel. At the head end, a large amount of flame is guided into the flame channel, and due to the closely arranged pipes in the coil 32, the flame will spray and burn in the flame channel, thereby increasing the heating intensity of the wide-diameter pipe 31 and vaporizing the liquid inside it.

[0051] The so-called "close arrangement" does not require that there is no gap between the pipes, and adjacent pipes can fit together. Due to factors such as deformation during processing, there may be some gaps between the pipes. For example, a gap of less than 2mm still falls within the scope of "close arrangement". The "head end" and "tail end" referred to in the patent are used to indicate the direction and cannot be narrowly defined as referring to a specific end face.

[0052] In traditional solutions, such as patent 202322476199.2, in order to increase the utilization rate of waste heat, a tightly arranged coil is used instead of the shell to heat the liquid in advance. In fact, this structure only plays a role in cooling the outside and cannot improve thermal efficiency.

[0053] Because for this steam atomizer structure, due to the limitation of the external shell, the combustion space is limited, and the wind provided by the fan is mainly sprayed outward from the middle of the coil. Conventional thinking believes that the temperature outside the flame is higher because the outer flame of the flame is in contact with the air and burns most fully. In the shell, since the fan supply air is sprayed from the middle of the shell, the inner flame temperature is actually the highest, so a coil with a spiral ring radial size of about 25mm is used to vaporize the liquid inside. The straight pipe is mainly for easy disassembly, so that the liquid inlet and outlet of the coil are at the same end and can be directly taken out. The pressure formed in the straight pipe is higher, which is easy to form fouling and blockage.

[0054] When the improved wide-diameter tube 31 is used, it is necessary to heat the liquid mainly in the coil 32 as much as possible, and then a large amount of liquid is vaporized in the wide-diameter tube 31. In order to achieve this goal, firstly, the coil 32 adopts a pipe with an inner diameter of 3.8~6.8mm, which reduces the heating efficiency compared to the pipe of 3~3.5mm. Secondly, because the coil 32 is closely arranged between the pipes on the tail end side, the flame is gathered in the flame channel, and the wide-diameter tube 31 is heated intensively, more heat can be absorbed and utilized, and a large amount of liquid can be vaporized in the inner cavity 311 of the wide-diameter tube 31.

[0055] The above areas allow heating and vaporization to be performed in different areas, and it does not exclude that part of the medium may be vaporized in the coil 32. The purpose of this solution is to vaporize most of the liquid medium in the wide-diameter tube 31, so that the pressure in this area can be reduced by utilizing the large space.

[0056] In one embodiment, the length of the interval in which the coils 32 are closely arranged is L, which is 1 / 3 of the length of the coils 32. Within the remaining length range, a gap of 3 to 5 mm or a larger gap can be formed between adjacent pipes in the coils 32. For example, within this length range, the closely arranged coils 32 can keep the flames wrapped around the outer periphery of the wide-diameter pipes 31, providing strong heating conditions for the wide-diameter pipes 31. This makes up for the problem of low heat absorption efficiency caused by the increase in the inner diameter.

[0057] In another practicable manner, the length L is 2 / 3 of the length of the coiled pipe 32, and a larger gap is formed between the remaining pipes for the flame to pass through.

[0058] In addition, the pipes of the entire coil 32 can be arranged closely, such as Figure 5 In this embodiment, the coil 32 is at a certain distance from the cover plate at the head end, thereby leaving a channel for flame combustion. The burning flame needs to discharge gas to the outside of the shell 2, and the gap between the pipes or the reserved distance can enable the flame smoke to be quickly discharged to the outside of the shell at the head end position, avoiding the formation of high pressure in the shell 2.

[0059] In some possible implementations, the spiral rings of the coil 32 are of equal diameter structure.

[0060] In other embodiments, Figure 6 As shown, the spiral ring of the coil 32 is a conical structure, and the radial dimension of the tail end is larger than the radial dimension of the head end.

[0061] As a variation of the wide-diameter tube 31 , it may be a structure consisting of two end tubes, and the inner diameters of the two end tubes are both larger than the inner diameter of the coil tube 32 .

[0062] exist Figure 6 In the embodiment, the coil 32 can adopt a relatively sparse spiral ring, and the diameter of the wide-diameter pipe 31 near the tail end is relatively small, which can better absorb heat and vaporize, and then the larger pipe at the head end is used to further increase the pressure capacity space.

[0063] In some embodiments, the end of the housing 2 has a flame cover plate, and the wide-diameter pipe 31 penetrates the flame cover plate, so that the nozzle 4 can be connected to the wide-diameter pipe 31 from the outside of the flame cover plate. Alternatively, the wide-diameter pipe 31 is welded to one side of the flame cover plate, and the nozzle 4 is welded to the other side of the flame cover plate, and a connecting hole is opened on the flame cover plate. Alternatively, the nozzle 4 penetrates the flame cover plate and is connected to the wide-diameter pipe 31.

[0064] As another embodiment of the nozzle 4, the nozzle 4 is detachably mounted on the head end of the wide-diameter tube 31, such as in the form of threads; or in the form of existing clamping by rotation, etc. When the nozzle 4 is separated from the wide-diameter tube 31, the dirt in the inner cavity 311 can be directly cleaned with an external tool.

[0065] Specifically, the nozzle 4 includes a connector 41 and a nozzle 42, and the connector 41 is connected to the wide-diameter pipe 31 in a threaded manner. Figure 7 As shown, the connector 41 adopts an external thread structure, and an internal thread is provided at the end of the wide-diameter pipe 31 to achieve the connection between the two. In another embodiment, the connector 41 can be a larger pipe mouth with an internal thread, and an external thread is provided at the end of the wide-diameter pipe 31 to achieve the connection between the two.

[0066] exist Figure 8 In the embodiment shown, the head end of the wide-diameter tube 31 has a cover plate 312 for blocking the inner cavity 311, and an interface tube 313 of the wide-diameter tube 31 is led out on the other side of the cover plate 312. The interface tube 313 is welded to the cover plate 312, and the inner diameter of the interface tube 313 is smaller than the inner diameter of the wide-diameter tube 31, so that the wide-diameter tube 31 is connected to the nozzle 4 with a smaller interface. Since high pressure will be formed inside the wide-diameter tube 31, it is difficult to seal if the threaded opening is large. It is easier to achieve sealing if an interface tube 313 with a smaller inner diameter is used, for example, the inner diameter of the interface tube 313 is 6-10 mm.

[0067] In other embodiments, the interface pipe 313 has a threaded structure for connecting the nozzle 4, thereby realizing a detachable connection between the nozzle 4 and the wide-diameter pipe 31. Furthermore, the depth of the thread of the interface pipe 313 in the axial direction is not less than 4 mm to ensure sealing.

[0068] Figure 7 and Figure 8 These are just two examples of the nozzle 4, which does not mean that it only has the connector 41 and the nozzle 42. In a specific implementation, the nozzle 4 used can be formed by a combination of different components, the connector 41 can be composed of multiple parts, and the form of the nozzle 42 can also be changed. For example, part of the structure of the nozzle 4 passes through the flame cover plate and is connected to the wide-diameter pipe 31. The connector 41 and the nozzle 42 can be an integrated structure or a split connection structure.

[0069] In combination with the above embodiments, in order to prevent the flame from spraying forward, a flame cover plate is connected to the head end of the shell 2, and the end of the wide-diameter pipe 31 passes through the flame cover plate. The flame cover plate is connected to the shell 2, which can be a connection in the form of a clamp or bolt. The coil 32 can be led out from the end notch of the shell 2 and connected to the external auxiliary agent box through the auxiliary agent pipe 321. The auxiliary agent pipe 321 and the coil 32 may have no obvious boundary, and may be the same connected pipe or two pipes combined together.

[0070] In a preferred embodiment, in order to facilitate fixation, the ends of the wide-diameter tube 31 and the coil tube 32 are both passed through the flame cover plate, and the wide-diameter tube 31 and the coil tube 32 can be taken out at the same time by removing the flame cover plate.

[0071] exist Figure 8 In one embodiment shown, the cover plate 312 of the inner cavity 311 may have a larger outer diameter, which is larger than the outer diameter of the wide-diameter tube 31 , so that the cover plate 312 can be used as a flame cover plate and connected to the shell 2 .

[0072] Fig. 9 Another embodiment of the nozzle 4 structure is shown, the nozzle 4 includes a connector 41 and a nozzle 42, the connector 41 is threadedly connected to the interface pipe 313 of the wide-diameter pipe 31. The nozzle 42 has a variable diameter structure to form a smaller injection port to change the flow rate of the medium to achieve atomization.

[0073] exist Fig. 9 In the embodiment, the nozzle 42 is further provided with a medicine nozzle 43, and the medicine nozzle 43 intersects with the nozzle 42 channel so that the medicine and the steam medium can be mixed.

[0074] As a specific embodiment, the provided atomizing spray device includes a fan 12, a combustion mechanism 11, a shell 2 and a nozzle 4 which are arranged in sequence, and the fan 12, the combustion mechanism 11 and the shell 2 are located on the same center line. A heating tube 3 is installed in the shell 2, and the heating tube 3 is connected to the nozzle 4. The heating tube 3 includes a wide-diameter tube 31 and a coil 32. The tail end of the wide-diameter tube 31 is close to the combustion mechanism 11, and the liquid inlet at the tail end of the wide-diameter tube 31 is connected to the liquid outlet of the coil 32. The wide-diameter tube 31 is a straight tube structure, and the coil 32 surrounds the outer circumference of the wide-diameter tube 31. At least the coil 32 is closely arranged between the pipes on the head end side, and an annular flame channel is formed between the inner wall of the coil 32 and the wide-diameter tube 31.

[0075] The inner diameter of the coil 32 is 4.5-6.5 mm, and the inner diameter of the wide-diameter tube 31 is 3-4 times the inner diameter of the coil 32, so that the wide-diameter tube 31 forms an expansion and pressure reduction space relative to the coil 32. The inner diameter of the wide-diameter tube 31 can be controlled to be 14-22 mm, the spacing between the inner wall of the spiral ring of the coil 32 and the wide-diameter tube 31 is 6-15 mm, and the spacing between the coil 32 and the inner wall of the shell 2 is 1-5 mm.

[0076] The end surface of the combustion mechanism 11 facing the housing 2 is provided with an oil injection port. In the cross-sectional projection, the oil injection port is located in the spiral ring of the coil 32. The tail end of the wide-diameter pipe 31 is 18-38 mm away from the oil injection port, so that the flame can be better guided to the flame channel. The nozzle 4 is detachably connected to the head end of the wide-diameter pipe 31, and is used to spray high-temperature and high-pressure media to form atomized particles.

[0077] The present invention provides an atomizing spraying method, which uses an atomizing spraying device for atomization. The atomizing spraying device is configured to have a combustion mechanism 11, a shell 2 and a nozzle 4. A heating tube 3 is installed in the shell 2, and the heating tube 3 is connected to the nozzle 4; the combustion mechanism 11 sprays flame into the shell 2 to heat the heating tube 3.

[0078] It is worth noting that in this embodiment, the heating tube 3 is configured to include a wide-diameter tube 31 and a coil 32. The tail end of the wide-diameter tube 31 is close to the combustion mechanism 11, and the liquid inlet at the tail end of the wide-diameter tube 31 is connected to the liquid outlet of the coil 32; the liquid medium is first quickly heated and heated in the coil 32, and then enters the wide-diameter tube 31 for further heating and vaporization. The inner diameter of the wide-diameter tube 31 is not less than twice the inner diameter of the coil 32, and the inner cavity 311 of the wide-diameter tube 31 forms a large volume space, so that the liquid inlet of the coil 32 and the inner cavity 311 have a large pressure difference, and the pressure in the inner cavity 311 is greater than the external air pressure, and the liquid medium is atomized when it is sprayed from the nozzle 4.

[0079] The method adopted in this embodiment changes the traditional single-tube heating method to double-tube heating. That is, the traditional steam sprayer directly uses the coil for heating, and hopes that the coil can obtain greater thermal efficiency. The straight tube arranged in the middle mainly serves the purpose of facilitating disassembly. Since it is heated more, it is most likely to be blocked. In the improved scheme, the larger inner cavity 311 of the wide-diameter tube 31 provides space for the vaporization of the liquid medium, thereby effectively releasing the high pressure formed in the narrow space, and then a greater pressure difference can be formed at both ends of the coil 32, accelerating the flow rate of the liquid in the coil 32, and the crystals precipitated in the coil 32 can be continuously washed into the inner cavity 311 of the wide-diameter tube 31, and many precipitated particles can be sprayed out from the nozzle. Therefore, the blockage of the coil 32 can be well alleviated.

[0080] In this method, an annular flame channel is arranged between the spiral ring of the coil 32 and the wide-diameter tube 31; the inner diameter of the coil 32 is 4.0~6.8mm, and the inner diameter of the wide-diameter tube 31 is 2.5~4.5 times the inner diameter of the coil 32, so that the wide-diameter tube 31 forms an expanded and pressure-reduced space relative to the coil 32.

[0081] In order to facilitate the cleaning of the dirt in the wide-diameter pipe 31, the nozzle 4 can be detachably connected to the wide-diameter pipe 31 in a threaded manner. The head end of the shell 2 is provided with a flame cover plate, the wide-diameter pipe 31 is fixedly connected to the flame cover plate, and an interface pipe 313 is formed on the outside of the flame cover plate. The interface pipe 313 is provided with a threaded connection port smaller than the inner diameter of the wide-diameter pipe 31, which is used to connect the nozzle 4 During implementation, the fan 12 can be connected to the tail end or side of the combustion mechanism 11 to supply air to the combustion mechanism 11. The fuel oil is mixed with the air and blown out at the same time, injected into the shell 2, and burned in the shell 2. The liquid inlet of the coil 32 is connected to the external auxiliary agent box through the auxiliary agent pipe 321 to transport the auxiliary agent to the coil 32. The auxiliary agent is heated inside the coil 32, and a small amount of the auxiliary agent is vaporized. A large amount of liquid is heated to a high temperature when flowing to the liquid outlet of the coil 32, and enters the wide-diameter pipe 31 for further heating and vaporization, and is sprayed out from the nozzle 42 to achieve an atomization effect.

[0082] In one embodiment, the pipes of the coil 32 are closely arranged between the pipes on the head end side, so as to guide the flame to the flame channel; a gap is formed between the pipes on the tail end side of the coil 32 for the flame to pass through, and the length L of the closely arranged section is 4 / 5 of the length of the coil 32. In another embodiment, the coil 32 is an equal diameter structure, the pipes between the coils 32 are arranged at equal intervals, and the adjacent pipes are closely arranged, so as to guide the flame to the flame channel.

[0083] Compared with the prior art, this embodiment makes the pipes of some coils 32 arranged closely, and the coils 32 are mainly heated on one side; further, the diameter of the coils 32 is increased, which reduces the heat absorption efficiency of the liquid in the coils 32, so that the liquid can quickly enter the wide-diameter pipe 31 and vaporize. At the same time, the heat that can be transferred to the housing 2 is reduced, and it also has an anti-scalding effect. When operating the handle 5 outside the housing 2, it is not easy to get burned.

[0084] Furthermore, as a protective measure, an anti-scalding cover can be provided on the outside of the housing 2. The anti-scalding cover can be provided with more vents to facilitate heat dissipation and reduce the surface temperature of the housing 2.

[0085] When implementing the above method, the atomizing spray device used can be implemented using the structure provided in other embodiments, and the implementations of the various parts of the atomizing spray device can also be combined with each other, which will not be described one by one.

[0086] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. An atomizing spray device, characterized in that: include: A combustion mechanism (11) for burning fuel and providing a flame; A shell body (2), wherein the rear end of the shell body (2) is sealed and connected to the combustion mechanism (11), and a smoke exhaust passage is provided at the front end of the shell body (2), and the flame generated by the combustion mechanism (11) burns inside the shell body (2); A heating tube (3) is arranged in the shell (2), comprising a wide-diameter tube (31) and a coil (32); wherein the coil (32) is a spiral structure and extends spirally along the axial direction of the shell (2); The wide-diameter tube (31) is sleeved in the coil tube (32) in the form of a straight tube, and the liquid inlet at the rear end thereof is connected to the liquid outlet of the coil tube (32); the inner diameter of the wide-diameter tube (31) is not less than twice the inner diameter of the coil tube (32); the distance between the rear end of the wide-diameter tube (31) and the end face of the combustion mechanism (11) is not less than 15 mm, so as to form a fuel injection area; A nozzle (4) is connected to the head end of the wide-diameter pipe (31), and after the high-pressure medium is sprayed out from the nozzle (4), atomized particles are formed.

2. An atomizing spray device according to claim 1, characterized in that: The inner diameter of the coiled tube (32) is 3.8 to 6.8 mm, and the inner diameter of the wide-diameter tube (31) is 2.5 to 4.8 times the inner diameter of the coiled tube (32).

3. An atomizing spray device according to claim 2, characterized in that: The wide-diameter tube (31) has an inner diameter of 14-22 mm.

4. An atomizing spray device according to claim 2, characterized in that: At the tail end of the coil (32), the radial distance between the coil (32) and the housing (2) is no greater than 8 mm.

5. The atomizing spray device according to claim 2, characterized in that: At the rear end of the coil (32), the spacing between the spiral ring surrounded by the coil (32) and the wide-diameter tube (31) is not less than 4 mm, forming a flame channel for guiding the flame.

6. An atomizing spray device according to claim 5, characterized in that: The pipes located at least on one side of the rear end of the coil (32) are closely arranged; the length of the interval in which the coil (32) is closely arranged is L, and the length L is not less than 1 / 3 of the length of the coil (32).

7. The atomizing spray device according to claim 1, characterized in that: The nozzle (4) is detachably mounted on the head end of the wide-diameter tube (31); the end of the housing (2) has a flame cover plate; the wide-diameter tube (31) penetrates the flame cover plate, so that the nozzle (4) can be connected to the wide-diameter tube (31) from the outside of the flame cover plate.

8. An atomizing spray device according to claim 7, characterized in that: The tail end of the wide-diameter pipe (31) adopts an interface pipe (313) structure, and the inner diameter of the interface pipe (313) is smaller than the inner diameter of the wide-diameter pipe (31), so that the wide-diameter pipe (31) is connected to the nozzle (4) via a smaller interface.

9. An atomizing spray device according to claim 8, characterized in that: The interface pipe (313) has an internal thread, the depth of which in the axial direction is not less than 4 mm.

10. The atomizing spray device according to claim 7, characterized in that: The head end of the coiled tube (32) passes through the flame cover plate, and the wide-diameter tube (31) and the coiled tube (32) can be taken out simultaneously by removing the flame cover plate.

11. The atomizing spray device according to claim 1, characterized in that: The spray head (4) comprises a connector (41) and a nozzle (42); the connector (41) is connected to the wide-diameter pipe (31) in a threaded manner; and the nozzle (42) has a variable diameter structure to change the flow rate of the medium to achieve atomization.

12. An atomizing spray device according to claim 11, characterized in that: The nozzle (42) is provided with a medicine nozzle, and the medicine nozzle intersects with the nozzle (42) channel, so that the medicine and the steam medium can be mixed.

13. The atomizing spray device according to claim 1, characterized in that: The combustion mechanism (11) is coaxially arranged with the shell (2); an oil injection port is arranged on the end surface of the combustion mechanism (11) facing the shell (2); in cross-sectional projection, the oil injection port is located within the spiral ring of the coil (32).

14. An atomizing spray device according to claim 13, characterized in that: A fan (12) is provided on the side of the combustion mechanism (11) facing away from the housing (2); the fan (12), the combustion mechanism (11) and the housing (2) are located on the same center line.

15. An atomizing spraying method, characterized in that: Atomization is performed using an atomizing spray device, the atomizing spray device being configured to include a combustion mechanism (11), a shell (2) and a nozzle (4); a heating tube (3) is installed in the shell (2), and the heating tube (3) is connected to the nozzle (4); the combustion mechanism (11) sprays flame into the shell (2) to heat the heating tube (3); The heating tube (3) is configured to include a wide-diameter tube (31) and a coil tube (32); the rear end of the wide-diameter tube (31) is close to the combustion mechanism (11); the liquid inlet at the rear end of the wide-diameter tube (31) is connected to the liquid outlet of the coil tube (32); the liquid medium is first rapidly heated in the coil tube (32) and then enters the wide-diameter tube (31) to be further heated and vaporized; The wide-diameter tube (31) is configured to have an inner diameter not less than twice the inner diameter of the coil tube (32), so that the inner cavity (311) of the wide-diameter tube (31) forms a relatively large volume space, so that there is a relatively large pressure difference between the liquid inlet of the coil tube (32) and the inner cavity (311), and the pressure in the inner cavity (311) is greater than the external air pressure, so that the liquid medium is atomized when sprayed from the nozzle (4).

16. An atomizing spraying method according to claim 15, characterized in that: An annular flame channel is arranged between the spiral ring of the coil (32) and the wide-diameter tube (31); the inner diameter of the coil (32) is 4.0 to 6.8 mm, and the inner diameter of the wide-diameter tube (31) is 2.5 to 4.8 times the inner diameter of the coil (32), so that the wide-diameter tube (31) forms an expanded and pressure-reduced space relative to the coil (32).

17. The atomizing spraying method according to claim 15, characterized in that: The nozzle (4) can be detachably connected to the wide-diameter pipe (31) in a threaded manner.

18. An atomizing spraying method according to claim 17, characterized in that: A flame cover plate is provided at the head end of the shell (2), the wide-diameter tube (31) is fixedly connected to the flame cover plate, and an interface tube (313) is formed on the outside of the flame cover plate. The interface tube (313) is provided with a threaded connection port having an inner diameter smaller than that of the wide-diameter tube (31) and is used for connecting the nozzle (4).

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