Spraying equipment

Abstract

The utility model provides spraying equipment, which comprises a spraying device, a spraying device, a gas spraying device and a gas spraying device, the spraying device is provided with a liquid spraying opening, the spraying device is internally provided with a liquid channel and a gas channel, and the liquid channel and the gas channel are both communicated to the liquid spraying opening; the liquid supply device is connected with the liquid channel through a communicating pipe, the liquid supply device comprises a liquid storage cavity and an air inlet cavity, the liquid storage cavity is used for storing liquid to be sprayed, the air inlet cavity is located in the middle of the liquid storage cavity, the top of the air inlet cavity is communicated with external atmosphere, and the air inlet cavity is provided with an air hole communicated with the liquid storage cavity; and the gas supply device is connected into the gas channel. According to the device, liquid such as alcohol can be conveyed and sprayed in a negative pressure mode, and the safety of the device is improved.

Description

Technical Field

[0001] This application relates to the field of liquid spraying technology, and more particularly to a spraying device. Background Technology

[0002] In industrial production processes, alcohol is often used to wipe and clean stains such as residual adhesive. Specifically, alcohol is sprayed onto a wiping tool (e.g., a sponge) using a spraying device, and then the stain is wiped clean using the alcohol-soaked tool. However, in existing technologies, alcohol is delivered and sprayed under high pressure, which makes it prone to leakage, compression ignition, or electrical short circuits, potentially leading to fires and posing a safety risk. Utility Model Content

[0003] This application provides a spraying device that allows liquids such as alcohol to be transported and sprayed under negative pressure, thereby improving the safety of the device.

[0004] This application provides a spraying device, which includes:

[0005] A spraying device is provided with a spray nozzle, and the interior of the spraying device is provided with a liquid channel and a gas channel, both of which are connected to the spray nozzle;

[0006] A liquid supply device is connected to the liquid channel via a connecting pipe. The liquid supply device includes a liquid storage chamber and an air inlet chamber. The liquid storage chamber is used to store the liquid to be sprayed. The air inlet chamber is located in the middle of the liquid storage chamber. The top of the air inlet chamber is connected to the outside atmosphere. The air inlet chamber is provided with an air hole that connects to the liquid storage chamber.

[0007] A gas supply device is connected to the gas channel.

[0008] Optionally, at least at the injection port, the gas channel is a closed annular structure surrounding the liquid channel;

[0009] The gas channel is provided with multiple gas delivery branches at a position away from the liquid injection port. Each gas delivery branch is arranged in a straight line and parallel to each other. The gas supply device is connected to the gas channel through the gas delivery branches.

[0010] Optionally, at least one side of the liquid spray nozzle is provided with an air jet nozzle, the air jet nozzle and the liquid spray nozzle are separated from each other, and the air supply device is connected to the air jet nozzle.

[0011] Optionally, the jet nozzle gradually tilts towards the liquid injection port in a direction from the inside out.

[0012] Optionally, the spraying device is provided with a first interface and a second interface;

[0013] The first interface is interconnected with the liquid channel, and the liquid supply device is connected to the first interface through the connecting pipe;

[0014] The second interface is connected to the gas channel and the jet nozzle, and the gas supply device is connected to the second interface.

[0015] Optionally, the spraying apparatus includes:

[0016] A spray cap, one end of which is provided with the liquid spray nozzle and the air spray nozzle;

[0017] The core body is located inside the spray cap, facing the spray nozzle. The liquid channel is located in the core body, and the gas channel is sandwiched between the core body and the spray cap.

[0018] The core is provided with a first sealing part, which is sealed to the inner wall of the spray cap. The gas passage is located on the side of the first sealing part near the liquid spray port, and the air jet is connected to the side of the first sealing part away from the liquid spray port.

[0019] Optionally, the spraying device further includes a connecting seat, which is connected to the end of the spray cap away from the spray nozzle, and the core is fixed between the spray cap and the connecting seat. The connecting seat is provided with a first interface and a second interface.

[0020] The first interface is interconnected with the liquid channel, and the liquid supply device is connected to the first interface;

[0021] The second interface is connected to the gas channel and the jet nozzle, and the gas supply device is connected to the second interface.

[0022] Optionally, the air holes are disposed on the side wall of the air inlet chamber and near the bottom of the liquid storage chamber, and there are multiple air holes, each of which is evenly distributed around the circumference of the air inlet chamber.

[0023] Optionally, the air inlet chamber extends to the bottom of the liquid storage chamber, the bottom of the liquid storage chamber is provided with a liquid inlet groove extending to the air inlet chamber, the bottom of the air inlet chamber is provided with a liquid outlet, and the two ends of the connecting pipe are respectively connected to the liquid outlet and the spraying device.

[0024] Optionally, the spraying equipment has a first state in which the liquid channel is horizontal, the spraying equipment is ready, and the lowest point of the vent is at the same height as the lowest point of the liquid channel.

[0025] The technical solution provided in this application can achieve the following beneficial effects:

[0026] The spraying equipment provided in this application includes a spraying device, a liquid supply device, and a gas supply device. The spraying device has a spray nozzle and internal liquid and gas channels, both of which are connected to the spray nozzle. The liquid supply device is connected to the liquid channel via a connecting pipe, and the gas supply device is connected to the gas channel. The gas supply device provides the power for liquid spraying. That is, utilizing the principle of fluid pressure, compressed air is used to generate negative pressure within the spraying device, achieving negative pressure liquid extraction and atomization. Therefore, normal spraying can be achieved simply by turning on the gas supply device, thus simplifying the operation of the spraying equipment. Furthermore, the negative pressure delivery method reduces the pressure of liquid delivery, reducing the risk of leakage during liquid delivery. In addition, this application does not require the use of high-pressure or electric pumps (e.g., peristaltic pumps, screw pumps, gear pumps, etc.) for liquid delivery, enabling circuit isolation during liquid delivery, avoiding accidents such as liquid combustion caused by circuit failure, improving the safety of the spraying equipment, and achieving energy saving and consumption reduction.

[0027] The liquid supply device includes a liquid storage chamber and an air inlet chamber. The liquid storage chamber is used to store the liquid to be sprayed. The air inlet chamber is located in the middle of the liquid storage chamber. The bottom of the air inlet chamber is connected to the liquid storage chamber, and the top of the air inlet chamber is connected to the outside atmosphere to reduce the gas pressure of the liquid storage and prevent accidents such as compression ignition caused by high-pressure liquid storage. In addition, the liquid supply device is connected to the outside atmosphere only through the air inlet chamber, which can reduce the contact area between the liquid to be sprayed and the outside atmosphere, thereby reducing the loss of the liquid to be sprayed, such as evaporation or oxidation. The air inlet chamber is provided with an air hole that connects to the liquid storage chamber, allowing the outside atmosphere to pass through the air hole and enter the liquid storage chamber in the form of bubbles, avoiding the generation of negative pressure in the liquid storage chamber, and allowing the liquid in the liquid storage chamber to continuously flow to the air inlet chamber under the action of gravity.

[0028] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0029] Figure 1 A schematic diagram of the spraying equipment provided in the embodiments of this application;

[0030] Figure 2 A simplified structural diagram of the spraying apparatus provided in the embodiments of this application;

[0031] Figure 3 A longitudinal cross-sectional view of the liquid supply device provided in the embodiments of this application;

[0032] Figure 4 A cross-sectional view of the liquid supply device provided in the embodiments of this application along the transverse direction;

[0033] Figure 5 This is a cross-sectional structural diagram of the spraying apparatus provided in an embodiment of this application.

[0034] Figure label:

[0035] 1-Spraying device;

[0036] 1a - Injection nozzle;

[0037] 1b - Liquid channel;

[0038] 1c - Gas channel;

[0039] 1d - Jet nozzle;

[0040] 1e - First Interface;

[0041] 1f - Second Interface;

[0042] 10-Spray cap;

[0043] 100 - First paragraph;

[0044] 102 - Second paragraph;

[0045] 12-Core;

[0046] 120 - First sealing part;

[0047] 122 - Second sealing part;

[0048] 124 - Third sealing part;

[0049] 126 - First through hole;

[0050] 128 - Second through hole;

[0051] 14-Connector;

[0052] 16-Adjusting rod;

[0053] 2-Liquid supply device;

[0054] 20 - Liquid reservoir;

[0055] 22 - Intake chamber;

[0056] 220 - Stomata;

[0057] 24-liquid outlet;

[0058] 26 - Air intake;

[0059] 28 - Liquid level sensor;

[0060] 29 - Liquid inlet tank;

[0061] 3-Gas supply device;

[0062] 4-Connecting tube.

[0063] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0065] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0066] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0067] like Figures 1-4As shown in the figure, this application embodiment provides a spraying device, which includes a spraying device 1, a liquid supply device 2, and a gas supply device 3. The spraying device 1 is provided with a spray nozzle 1a, and the interior of the spraying device 1 is provided with a liquid channel 1b and a gas channel 1c, both of which are connected to the spray nozzle 1a. The liquid supply device 2 is connected to the liquid channel 1b and is used to input the spraying liquid, such as alcohol, into the spraying device 1. The gas supply device 3 is connected to the gas channel 1c and is used to input the gas, such as compressed air, into the spraying device 1. The gas supply device 3 provides the power for liquid spraying, that is, using the principle of fluid pressure, a negative pressure is generated in the spraying device 1 by compressed air to achieve the functions of negative pressure liquid extraction and atomization. Therefore, as long as the gas supply device 3 is turned on, normal spraying can be achieved, thereby simplifying the use and operation of the spraying equipment. In addition, the negative pressure delivery method reduces the pressure of liquid delivery, which can reduce the risk of leakage during liquid delivery. Furthermore, this application eliminates the need for power components such as high-pressure or electric pumps (e.g., peristaltic pumps, screw pumps, gear pumps, etc.) to transport liquids, enabling circuit isolation during liquid transport, preventing accidents such as liquid combustion caused by circuit failures, improving the safety of the spraying equipment, and achieving energy saving and consumption reduction.

[0068] Specifically, when the spraying equipment is needed for spraying, simply turn on the air supply device 3 to input compressed air into the gas channel 1c. The compressed air passes through the gas channel 1c and forms a high-speed gas at the spray nozzle 1a, creating a negative pressure at the spray nozzle 1a. Through the negative pressure adsorption, the liquid in the liquid supply device 2 is drawn into the liquid channel 1b, achieving negative pressure liquid extraction. After passing through the liquid channel 1b, the liquid mixes with the high-speed gas at the spray nozzle 1a to form a liquid spray, achieving liquid atomization.

[0069] Furthermore, the liquid supply device 2 is connected to the liquid channel 1b via the connecting pipe 4, forming a communicating vessel between the liquid supply device 2 and the liquid channel 1b. Under the influence of gravity, the liquid in the communicating vessel maintains a level surface due to pressure balance. Therefore, when the liquid in the liquid channel 1b decreases due to ejection, the liquid in the liquid supply device 2 can continuously flow to the liquid channel 1b, achieving constant pressure automatic liquid supply. A liquid level sensor 28 can be installed in the liquid supply device 2 to detect the liquid level height, preventing insufficient liquid in the liquid supply device 2 from affecting the normal spraying of the spraying equipment.

[0070] Furthermore, the liquid supply device 2 includes a liquid storage chamber 20 and an air inlet chamber 22. The liquid storage chamber 20 is used to store the liquid to be sprayed. The air inlet chamber 22 is located in the middle of the liquid storage chamber 20. The bottom of the air inlet chamber 22 is connected to the liquid storage chamber 20, and the top of the air inlet chamber 22 is connected to the outside atmosphere. For example, an air inlet 26 can be provided at the top of the air inlet chamber 22 to reduce the air pressure of the liquid storage and prevent accidents such as compression ignition caused by high-pressure liquid storage. In addition, the liquid supply device 2 is connected to the outside atmosphere only through the air inlet chamber 22, which can reduce the contact area between the liquid to be sprayed and the outside atmosphere, thereby reducing the loss of the liquid to be sprayed, such as evaporation or oxidation. The air inlet chamber 22 is provided with an air hole 220 that connects to the liquid storage chamber 20, so that the outside atmosphere can pass through the air hole 220 and enter the liquid storage chamber 20 in the form of bubbles, avoiding the generation of negative pressure in the liquid storage chamber 20, and allowing the liquid in the liquid storage chamber 20 to continuously flow to the air inlet chamber 22 under the action of gravity.

[0071] The flow of liquid and the rapid rise of bubbles are necessarily caused by liquid pressure. Since liquid pressure is the product of pressure and area, and the pressure inside the communicating vessel remains constant, the cross-section of the communicating tube 4 can be appropriately increased. For example, the cross-section of the communicating tube 4 can be increased from... Replace with This increases the driving force of liquid flow. It should be noted that the cross-section of the air inlet chamber 22 should be larger than the cross-section of the connecting pipe 4 to minimize the level difference between the controlled liquid level and the regulating liquid level, achieving precise liquid replenishment. A detailed analysis follows:

[0072] refer to Figure 1 Point A at the top of the air inlet 22 and point B at the liquid spray nozzle 1a are under the same atmospheric pressure. When there is no liquid in the spraying device 1, point E at the end of the connecting pipe 4 closest to the spraying device 1 is also under the same atmospheric pressure. Therefore, the pressures at points A, B, and E are equal. According to Pascal's theorem P = F / S (where P is pressure, F is force, and S is the area of ​​force application), we know that F... A / S A =F E / S E To achieve precise fluid replacement, it is necessary to ensure F A >F E Therefore, S needs to be satisfied. A >S E .

[0073] Furthermore, the air vent 220 is located on the side wall of the air inlet chamber 22 to prevent the air inlet chamber 22 itself from exerting a downward force on the bubbling. This ensures that the bubbling is only subjected to the upward buoyancy of the liquid and the downward pressure of the liquid. Moreover, the buoyancy of the liquid on the bubbling is always greater than the pressure of the liquid on the bubbling. Therefore, it can be guaranteed that the air entering through the small hole will always cause bubbling, and the bubbling will always rise to the surface, ultimately eliminating the bubble error and ensuring the accuracy of the liquid level.

[0074] Furthermore, the number of vents 220 is multiple to increase the rate at which gas enters the liquid storage chamber 20 and to better control the liquid level accuracy. Each vent 220 is evenly distributed around the circumference of the air inlet chamber 22 to create a uniform gas flow around the air inlet chamber 22 and the liquid storage chamber 20, thereby reducing liquid surface fluctuations.

[0075] Furthermore, the vent 220 is located near the bottom of the liquid storage chamber 20 to reduce the amount of liquid below the height of the vent 220 in the liquid storage chamber 20, improve the effective utilization rate of the liquid in the liquid storage chamber 20, and avoid excessive liquid that cannot flow out remaining in the liquid storage chamber 20.

[0076] Furthermore, the air inlet chamber 22 extends to the bottom of the liquid storage chamber 20. The bottom of the liquid storage chamber 20 is provided with a liquid inlet groove 29 extending to the air inlet chamber 22. The bottom of the air inlet chamber 22 is provided with a liquid outlet 24. The two ends of the connecting pipe 4 are respectively connected to the liquid outlet 24 of the air inlet chamber 22 and the spraying device 1, so that the air inlet chamber 22 and the spraying device 1 are interconnected through the connecting pipe 4 to form a communicating vessel. This allows the storage and supply of liquid to proceed independently, thereby enabling better control of the liquid level accuracy and achieving precise liquid replenishment. Specifically, when the liquid to be sprayed in the liquid channel 1b is sprayed out, the liquid to be sprayed in the air inlet chamber 22 flows to the liquid channel 1b, achieving constant pressure automatic liquid supply. Furthermore, the liquid in the liquid storage chamber 20 enters the air inlet chamber 22 through the liquid inlet groove 29, replenishing the liquid in the air inlet chamber 22, thus keeping the liquid level in the air inlet chamber 22 constant and achieving continuous liquid supply.

[0077] Furthermore, the spraying equipment has a first state in which the liquid channel 1b is horizontal, the spraying equipment is ready, and the lowest point of the air hole 220 is at the same height as the lowest point of the liquid channel 1b, so that the liquid remains stationary at the lowest points of the air hole 220 and the liquid channel 1b. On the one hand, this ensures that the liquid remains stably below the position of the liquid channel 1b, preventing liquid from overflowing from the liquid channel 1b and the spray nozzle 1a; on the other hand, it minimizes the distance between the liquid and the spray nozzle 1a. As long as the air supply device 3 is turned on to generate negative pressure, the spray nozzle 1a can quickly spray atomized liquid, overcoming the problem of spray delay and improving the efficiency of liquid spraying.

[0078] like Figure 5 As shown in the above embodiments, an adjusting rod 16 can be installed inside the liquid channel 1b. The adjusting rod 16 is connected to the liquid channel 1b via a threaded or other structure. By rotating the adjusting rod 16, the user can move the adjusting rod 16 along the axial direction of the liquid channel 1b, thereby adjusting the actual area of ​​the liquid channel 1b and controlling the liquid flow rate.

[0079] Furthermore, at least at the liquid outlet 1a, the gas channel 1c is a closed annular structure surrounding the liquid channel 1b. Multiple gas delivery branches can be provided in the gas channel 1c away from the liquid outlet 1a. The gas supply device 3 connects to the gas channel 1c through these gas delivery branches, causing the high-speed gas to be ejected in an annular pattern. This increases the contact area between the liquid and the high-speed gas, and ensures uniform contact between them, resulting in more uniform atomized liquid. The gas delivery branches can be arranged in a straight line and parallel to each other to adjust the gas flow direction, reduce swirling airflow, and thus improve the liquid atomization effect.

[0080] Furthermore, at least one side of the liquid spray nozzle 1a is provided with an air jet nozzle 1d. The cross-section of the air jet nozzle 1d is much smaller than that of the liquid spray nozzle 1a. The air jet nozzle 1d is separated from the liquid spray nozzle 1a, and the air supply device 3 is connected to the air jet nozzle 1d. The high-speed gas ejected from the air jet nozzle 1d blows towards the atomized liquid ejected from the liquid spray nozzle 1a, which can adjust the spray shape so that the spray shape matches the size and shape of the area to be sprayed, thereby improving spraying efficiency and avoiding liquid waste.

[0081] Specifically, the position and number of jet nozzles 1d can be reasonably set according to the requirements of the spray shape. For example, a jet nozzle 1d can be set on each side opposite to the liquid spray nozzle 1a, thereby forming an approximately rectangular or elliptical spray shape.

[0082] Furthermore, along the direction from the inside out (i.e., the direction of gas flow within the nozzle 1d), the nozzle 1d gradually tilts towards the liquid injection port 1a. The high-speed gas ejected from the nozzle 1d can directly blow onto the atomized liquid, enabling the atomized liquid ejected from the liquid injection port 1a to complete the spray shape adjustment within a shorter distance.

[0083] Furthermore, the spraying device 1 is provided with a first interface 1e and a second interface 1f. The first interface 1e is interconnected with the liquid channel 1b, and the liquid supply device 2 is connected to the first interface 1e through a connecting pipe 4, thereby achieving the connection and fixation between the liquid supply device 2 and the spraying device 1. The second interface 1f is interconnected with the gas channel 1c and the air jet 1d, and the air supply device 3 is connected to the second interface 1f, thereby achieving the connection and fixation between the air supply device 3 and the spraying device 1. Moreover, both the gas channel 1c and the air jet 1d are connected to the second interface 1f. Through one air supply device 3 and one air supply pipe, high-pressure gas can be simultaneously supplied to the gas channel 1c and the air jet 1d, thereby simplifying the overall structure of the spraying equipment.

[0084] In some embodiments, the spraying apparatus 1 includes a spray cap 10 and a core 12. One end of the spray cap 10 is provided with a liquid spraying port 1a. The core 12 is located inside the spray cap 10, facing the liquid spraying port 1a. A liquid channel 1b is disposed inside the core 12, and a gas channel 1c is sandwiched between the core 12 and the spray cap 10. That is, the annular gap between the core 12 and the spray cap 10 forms the gas channel 1c, eliminating the need for special processing to form the gas channel 1c and simplifying the manufacturing process of the spraying apparatus 1.

[0085] Furthermore, the spray cap 10 has an air jet 1d on one side of the liquid injection port 1a. That is, the air jet 1d and the liquid injection port 1a are located at the same end of the spray cap 10, and the air jet 1d and the liquid injection port 1a are spaced apart from each other. The outer periphery of the core 12 is provided with an annular first sealing part 120. The first sealing part 120 seals with the inner wall of the spray cap 10 and divides the internal space of the spray cap 10 into two segments along the axial direction, namely, a first segment 100 near the liquid injection port 1a and a second segment 102 away from the liquid injection port 1a. The cross-section of the second segment 102 is larger than that of the first segment 100. The gas channel 1c is provided on the side of the first sealing part 120 near the liquid injection port 1a. That is, the annular gap between the core 12 and the first segment 100 forms the gas channel 1c. The air jet 1d is connected to the side of the first sealing part 120 away from the liquid injection port 1a. That is, the air jet 1d is connected to the second segment 102. Therefore, the liquid injection port 1a and the air injection port 1d can be supplied with air independently within the same valve cap.

[0086] Furthermore, the spraying device 1 also includes a connecting seat 14, which is connected to the end of the spray cap 10 away from the liquid spraying port 1a. The core 12 is fixed between the spray cap 10 and the connecting seat 14. The connecting seat 14 is provided with the aforementioned first interface 1e and second interface 1f. That is, the first interface 1e is interconnected with the liquid channel 1b, and the liquid supply device 2 is connected to the first interface 1e through the connecting pipe 4; the second interface 1f is interconnected with the gas channel 1c, and the second interface 1f is interconnected with the air jet port 1d, and the air supply device 3 is connected to the second interface 1f.

[0087] Specifically, a second sealing part 122 may be provided at the end of the core 12 facing the connecting seat 14. The second sealing part 122 is in a sealing fit with the inner wall of the connecting seat 14 to prevent the liquid inside the core 12 from mixing with the high-pressure gas outside the core 12, which would affect the normal spraying of the liquid. The core 12 may be provided with an annular third sealing part 124. The third sealing part 124 is in a sealing fit with the inner wall of the connecting seat 14 to allow the high-pressure gas to flow along a predetermined path.

[0088] Furthermore, the core 12 can be provided with multiple first through holes 126. The extension direction of the first through holes 126 is consistent with the extension direction of the liquid channel 1b. The first through holes 126 connect the first interface 1e and the first segment 100 where the gas channel 1c is located. Each first through hole 126 is evenly distributed around the liquid channel 1b, thereby forming multiple gas delivery branches. Moreover, each gas delivery branch is straight and arranged in parallel with each other. Therefore, the gas flow direction can be adjusted and the rotating airflow can be reduced.

[0089] Furthermore, the core 12 can be provided with multiple second through holes 128. The extension direction of the second through holes 128 is roughly the same as the extension direction of the liquid channel 1b. The second through holes 128 connect the second interface 1f and the second section 102 where the jet nozzle 1d is located, thereby delivering high-pressure gas to the jet nozzle 1d for ejection.

[0090] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A spraying device, characterized in that, include: A spraying device is provided with a spray nozzle, and the interior of the spraying device is provided with a liquid channel and a gas channel, both of which are connected to the spray nozzle; A liquid supply device is connected to the liquid channel via a connecting pipe. The liquid supply device includes a liquid storage chamber and an air inlet chamber. The liquid storage chamber is used to store the liquid to be sprayed. The air inlet chamber is located in the middle of the liquid storage chamber. The top of the air inlet chamber is connected to the outside atmosphere. The air inlet chamber is provided with an air hole that connects to the liquid storage chamber. A gas supply device is connected to the gas channel.

2. The spraying equipment according to claim 1, characterized in that, At least at the injection port, the gas channel is a closed annular structure surrounding the liquid channel; The gas channel is provided with multiple gas delivery branches at a position away from the liquid injection port. Each gas delivery branch is arranged in a straight line and parallel to each other. The gas supply device is connected to the gas channel through the gas delivery branches.

3. The spraying equipment according to claim 1, characterized in that, At least one side of the liquid spray nozzle is provided with an air jet nozzle, the air jet nozzle and the liquid spray nozzle are separated from each other, and the air supply device is connected to the air jet nozzle.

4. The spraying equipment according to claim 3, characterized in that, Along the direction from the inside out, the jet nozzle gradually tilts towards the direction of the liquid injection port.

5. The spraying equipment according to claim 3, characterized in that, The spraying device is provided with a first interface and a second interface; The first interface is interconnected with the liquid channel, and the liquid supply device is connected to the first interface through the connecting pipe; The second interface is connected to the gas channel and the jet nozzle, and the gas supply device is connected to the second interface.

6. The spraying equipment according to claim 3, characterized in that, The spraying device includes: A spray cap, one end of which is provided with the liquid spray nozzle and the air spray nozzle; The core body is located inside the spray cap, facing the spray nozzle. The liquid channel is located in the core body, and the gas channel is sandwiched between the core body and the spray cap. The core is provided with a first sealing part, which is sealed to the inner wall of the spray cap. The gas passage is located on the side of the first sealing part near the liquid spray port, and the air jet is connected to the side of the first sealing part away from the liquid spray port.

7. The spraying equipment according to claim 6, characterized in that, The spraying device further includes a connecting seat, which is connected to the end of the spray cap away from the spray nozzle. The core is fixed between the spray cap and the connecting seat. The connecting seat is provided with a first interface and a second interface. The first interface is interconnected with the liquid channel, and the liquid supply device is connected to the first interface; The second interface is connected to the gas channel and the jet nozzle, and the gas supply device is connected to the second interface.

8. The spraying equipment according to any one of claims 1-7, characterized in that, The air vents are located on the side wall of the air inlet chamber and near the bottom of the liquid storage chamber. There are multiple air vents, and each air vent is evenly distributed around the circumference of the air inlet chamber.

9. The spraying equipment according to claim 8, characterized in that, The air inlet chamber extends to the bottom of the liquid storage chamber. The bottom of the liquid storage chamber is provided with a liquid inlet groove extending to the air inlet chamber. The bottom of the air inlet chamber is provided with a liquid outlet. The two ends of the connecting pipe are respectively connected to the liquid outlet and the spraying device.

10. The spraying equipment according to claim 8, characterized in that, The spraying equipment has a first state in which the liquid channel is horizontal, the spraying equipment is ready, and the lowest point of the vent is at the same height as the lowest point of the liquid channel.

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