Continuous spray coater and method thereof

Abstract

The application discloses a continuous spraying machine and a method thereof, which is used for continuously spraying material liquid, and helps to improve spraying quality and spraying efficiency. The continuous spraying machine comprises a machine body, a plunger pump and an energy storage device. The energy storage device is correspondingly arranged at a liquid outlet of the plunger pump, and the energy storage device has an energy storage state and an energy release state. When the plunger pump is in the positive pressure working state, the plunger pump is used for pressurizing the material liquid in the pump to flow out through the liquid outlet, and the energy storage device is in the energy storage state and is used for accumulating part of the pressurized material liquid to spray another part of the pressurized material liquid. When the plunger pump is in the negative pressure working state, the plunger pump is used for negative pressure suction of the material liquid through a liquid inlet of the plunger pump, and the energy storage device is in the energy release state and is used for releasing the accumulated material liquid to spray the released material liquid.

Description

Technical Field

[0001] This invention relates to the field of electric technology, and in particular to a continuous spraying machine and method thereof. Background Technology

[0002] In existing technologies, the spraying of liquid coatings or latex paints typically uses compressed air spraying instead of traditional roller or brush coating processes. However, this method suffers from poor coating quality and low efficiency because the compressed air contains impurities such as water and oil. Currently, high-pressure airless sprayers are available on the market. These typically use a storage bottle to supply liquid to a plunger pump, which pressurizes the paint and then sprays it through very fine nozzles on the sprayer, creating a fan-shaped mist. However, while this airless spraying machine solves the problems of gas spraying machines, it is limited by the working principle of the plunger pump. The plunger pump switches back and forth between positive and negative pressure working states. When the plunger pump is in negative pressure working state, the inlet of the plunger pump is opened to draw liquid under negative pressure, but the outlet of the plunger pump is blocked and cannot continue to discharge liquid. In other words, no liquid will be sprayed out when the plunger pump is in negative pressure working state, which makes this spraying machine only able to spray intermittently, resulting in poor spraying quality.

[0003] Currently, to improve coating quality, existing airless sprayers typically employ multi-cylinder plunger pumps or multiple plunger pumps, utilizing staggered pressurization processes within different cylinders of the same plunger pump or different plunger pumps to achieve time-sharing spraying. However, this approach not only requires a more complex structure and increases manufacturing costs, but also necessitates that different pressurization processes be spaced out to avoid interference between different cylinders of the same plunger pump or different plunger pumps. The only way to shorten the spraying interval is to increase the number of cylinders or plunger pumps, which does not truly achieve continuous spraying. In particular, as the number of cylinders or plunger pumps increases, manufacturing and operating costs will increase significantly, and control will become more difficult. Summary of the Invention

[0004] One advantage of this invention is that it provides a continuous spraying machine and method that can continuously spray paint liquid, which helps to improve spraying quality and increase spraying efficiency.

[0005] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the invention, the continuous spraying machine can achieve continuous spraying of liquid material using an energy storage device with only one plunger pump, so as to improve the uniformity of liquid material spraying.

[0006] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the present invention, the energy storage device of the continuous spraying machine can achieve continuous spraying using only hollow elastic tubes such as polyurethane tubes or expansion tubes, which is simple in structure and low in cost.

[0007] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof. In one embodiment of the present invention, the continuous spraying machine can achieve continuous spraying without changing the original structural frame, only requiring the additional configuration of the energy storage device, which helps to significantly reduce the modification cost of the spraying machine.

[0008] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the invention, the continuous spraying machine can use a liquid storage bag to supply liquid so as to perform negative pressure liquid suction and reduce power loss.

[0009] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the present invention, the continuous spraying machine can utilize the liquid storage bag to achieve airless liquid supply, thereby avoiding air mixing into the liquid and helping to improve the spraying quality.

[0010] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the present invention, the soft bag of the liquid storage bag in the continuous spraying machine can be deflated as the liquid inside the bag is drawn out by negative pressure, so as to avoid air mixing into the liquid and help to achieve uniform spraying of the liquid.

[0011] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof. In one embodiment of the present invention, the continuous spraying machine can automatically squeeze the soft bag of the liquid storage bag by using external atmospheric pressure during the spraying process, so that the liquid adhering to the inner wall of the bag gathers near the liquid supply port of the liquid storage bag, which facilitates full utilization of the liquid and avoids waste of resources.

[0012] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the present invention, the continuous spraying machine can widen the spraying angle to a certain extent, which facilitates high-quality spraying of various surfaces such as walls, ceilings or base plates, without worrying about the spraying quality being affected by intermittent spraying.

[0013] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the invention, the continuous spraying machine can fully draw liquid from the liquid storage bag without using a suction tube, which helps to simplify the structure and reduce costs.

[0014] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the present invention, the continuous spraying machine can utilize the weight of the liquid material to assist in the liquid supply, so that the plunger pump only needs a small suction force to complete the material suction, which helps to reduce power consumption.

[0015] Another advantage of the present invention is that it provides a continuous spraying machine and method thereof, wherein, in one embodiment of the invention, the continuous spraying machine does not require a liquid storage bag to support the machine body or balance the center of gravity, which helps to make it stand stably by means of the handle whether or not a liquid storage bag is present.

[0016] Another advantage of this invention is that it provides a continuous spraying machine and method, wherein, to achieve the aforementioned advantages, complex structures or designs are not required. Therefore, this invention successfully and effectively provides a solution that not only offers a simple continuous spraying machine and method, but also increases the practicality and reliability of said continuous spraying machine and method.

[0017] To achieve at least one of the above advantages or other advantages and objectives, the present invention provides a continuous spraying machine for spraying paint liquid, wherein the continuous spraying machine comprises:

[0018] Organism;

[0019] A plunger pump, wherein the plunger pump is disposed within the machine body, and the plunger pump is controlled to reciprocate between a negative pressure operating state and a positive pressure operating state; and

[0020] An energy storage device is provided, wherein the energy storage device is correspondingly disposed at the outlet of the plunger pump, and the energy storage device has an energy storage state and an energy release state. When the plunger pump is in the positive pressure operating state, the plunger pump pressurizes the liquid inside the pump to flow out through the outlet, and the energy storage device is in the energy storage state to accumulate a portion of the pressurized liquid for ejecting the other portion of the pressurized liquid. When the plunger pump is in the negative pressure operating state, the plunger pump draws in the liquid through the negative pressure inlet of the plunger pump, and the energy storage device is in the energy release state to release the accumulated liquid for ejecting the released liquid.

[0021] According to one embodiment of this application, the energy storage state and the energy release state of the energy storage device correspond one-to-one with the positive pressure working state and the negative pressure working state of the plunger pump, and are switched synchronously.

[0022] According to one embodiment of this application, the energy storage device has a variable volume energy storage chamber, and the energy storage chamber is connected to the liquid outlet of the plunger pump. When the energy storage device is in the energy storage state, the volume of the energy storage chamber increases from small to large to accumulate the liquid, and when the energy storage device is in the energy release state, the volume of the energy storage chamber decreases from large to small to release the accumulated liquid.

[0023] According to one embodiment of this application, the energy storage device includes a hollow elastic tube, wherein the hollow elastic tube is disposed in the body, and one end of the hollow elastic tube is connected to the liquid outlet of the plunger pump, so as to form a variable volume energy storage cavity at the liquid outlet of the plunger pump through the tube wall of the hollow elastic tube.

[0024] According to one embodiment of this application, the wall thickness of the hollow elastic tube is designed to decrease as the pressure of the liquid in the energy storage cavity increases and increase as the pressure of the liquid in the energy storage cavity decreases.

[0025] According to one embodiment of this application, the hollow elastic tube is a polyurethane tube.

[0026] According to one embodiment of this application, the inner diameter of the hollow elastic tube is configured to increase as the pressure of the liquid in the energy storage cavity increases, and decrease as the pressure of the liquid in the energy storage cavity decreases.

[0027] According to one embodiment of this application, the hollow elastic tube is an expansion tube.

[0028] According to one embodiment of this application, the energy storage device includes an energy storage cavity disposed in the substrate, a movable member disposed movably in the energy storage cavity, and an elastic element for applying an elastic force to the movable member, wherein the movable member divides the space within the energy storage cavity into mutually isolated subspaces, thereby defining the energy storage cavity through a subspace within the energy storage cavity that communicates with the outlet of the plunger pump.

[0029] According to one embodiment of this application, the continuous spraying machine further includes a liquid storage container, wherein the liquid storage container is connected to the inlet of the plunger pump for storing the liquid material, such that the plunger pump draws the liquid material from the liquid storage container under negative pressure when in the negative pressure working state.

[0030] According to one embodiment of this application, the liquid storage container is a liquid storage bag or a storage bottle.

[0031] According to one embodiment of this application, the liquid storage container is detachably installed on the machine body, and the liquid supply interface of the liquid storage container is directly connected to the liquid inlet of the plunger pump.

[0032] According to one embodiment of this application, the liquid storage container is located above the plunger pump.

[0033] According to one embodiment of this application, the continuous spraying machine further includes a liquid delivery pipe, wherein one end of the liquid delivery pipe is connected to the liquid supply port of the liquid storage container, and the other end of the liquid delivery pipe is connected to the liquid inlet of the plunger pump.

[0034] According to one embodiment of this application, the body includes a housing, a handle extending downward from the housing, and a switch assembly disposed on the handle, wherein the plunger pump is disposed within the housing, and the liquid storage bag is mounted on the housing, wherein the power supply device is disposed on the handle, and the switch assembly is controllably connected to the plunger pump for manually controlling the opening and closing of the plunger pump.

[0035] According to one embodiment of this application, the machine body further includes a power supply device, wherein the power supply device is disposed on the handle and is electrically connected to the plunger pump for supplying power to the plunger pump, thereby causing the plunger pump to switch back and forth between the negative pressure operating state and the positive pressure operating state.

[0036] According to one embodiment of this application, the body further includes a nozzle assembly, wherein the nozzle assembly is correspondingly disposed at the liquid outlet of the plunger pump, and the energy storage device is located between the liquid outlet of the plunger pump and the nozzle assembly.

[0037] According to one embodiment of this application, the body further includes a pressure relief assembly, wherein the pressure relief assembly includes a pressure relief valve disposed at the pressure relief port of the plunger pump and a pressure relief channel for connecting the reflux interface of the liquid storage container and the pressure relief port of the plunger pump, wherein the pressure relief valve of the pressure relief assembly is used to open or block the pressure relief port of the plunger pump.

[0038] According to one embodiment of this application, the plunger pump includes a motor disposed on the machine body, a pump body having the inlet and the outlet, a plunger rod movably disposed on the pump body, and a transmission mechanism tractably connected to the motor and the plunger rod.

[0039] According to one embodiment of this application, the plunger pump further includes a lubricating sleeve disposed between the pump body and the plunger rod, wherein the lubricating sleeve has an inner annular oil reservoir and an end face oil reservoir surrounding the surface of the plunger rod.

[0040] According to another aspect of this application, this application further provides a continuous spraying method, comprising the steps of:

[0041] Start the plunger pump of the continuous spraying machine to switch back and forth between negative pressure and positive pressure operating states;

[0042] When the plunger pump is in the positive pressure operating state, a portion of the pressurized liquid is stored in the energy storage device to spray out the remaining portion of the pressurized liquid; and

[0043] When the plunger pump is in the negative pressure working state, the stored liquid is released through the energy storage device to spray out the released liquid.

[0044] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings.

[0045] These and other objects, features and advantages of the present invention will be fully realized through the following detailed description, drawings and claims. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of a continuous spraying machine according to an embodiment of the present invention.

[0047] Figure 2 A cross-sectional schematic diagram of the continuous spraying machine according to the above embodiment of the present invention is shown.

[0048] Figure 3 A schematic diagram of the state of the energy storage device in the continuous spraying machine according to the above embodiment of the present invention is shown.

[0049] Figure 4 A schematic diagram is shown of the plunger pump operating under negative pressure in the continuous spraying machine according to the above embodiment of the present invention.

[0050] Figure 5 A schematic diagram is shown of the plunger pump operating under positive pressure in the continuous spraying machine according to the above embodiment of the present invention.

[0051] Figure 6 An exploded schematic diagram of the continuous spraying machine according to the above embodiment of the present invention is shown.

[0052] Figure 7 A bottom view schematic diagram of the liquid storage bag in the continuous spraying machine according to the above embodiment of the present invention is shown.

[0053] Figure 8 A partial cross-sectional schematic diagram of the liquid storage bag according to the above embodiment of the present invention is shown.

[0054] Figure 9 A schematic diagram showing the state of the liquid storage bag in the continuous spraying machine according to the above embodiment of the present invention is shown.

[0055] Figure 10 A partially enlarged schematic diagram of the plunger pump according to the above embodiment of the present invention is shown.

[0056] Figure 11 A schematic diagram of the structure of the lubrication sleeve in the plunger pump according to the above embodiment of the present invention is shown.

[0057] Figure 12 A schematic diagram showing the state of the pressure relief assembly in the continuous spraying machine according to the above embodiment of the present invention is shown.

[0058] Figure 13 A first modified embodiment of the continuous spraying machine according to the above-described embodiment of the present invention is shown.

[0059] Figure 14 A second modified embodiment of the continuous spraying machine according to the above-described embodiment of the present invention is shown.

[0060] Figure 15 A third modified embodiment of the continuous spraying machine according to the above-described embodiments of the present invention is shown.

[0061] Figure 16 This is a schematic flowchart of a continuous spraying method according to an embodiment of the present invention. Detailed Implementation

[0062] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0063] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0064] In this invention, the term "a" in the claims and specification should be understood as "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. Unless explicitly indicated in the disclosure of this invention that the number of the element is only one, the term "a" should not be construed as unique or single, and the term "a" should not be construed as a limitation on the quantity.

[0065] In the description of this invention, it should be understood that terms such as "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, terms such as "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through a medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Application Overview

[0068] As described in the background section, in the prior art, the spraying of liquid coatings or latex paints typically uses compressed air spraying instead of traditional roller or brush coating processes. However, this method of spraying results in spots or bubbles on the sprayed surface due to impurities such as water and oil contained in the compressed air, leading to poor spraying quality and low spraying efficiency. Currently, high-pressure airless sprayers have appeared on the market. These typically use a storage bottle to supply liquid to a plunger pump, which pressurizes the paint and then sprays it out through very fine nozzles on the sprayer, forming a fan-shaped mist. However, while this type of airless sprayer solves the problems of gas sprayers, it is limited by the working principle of the plunger pump. The plunger pump switches between positive and negative pressure operating states. When the plunger pump is in negative pressure mode, the inlet is open for negative pressure liquid intake, but the outlet is blocked, preventing further liquid discharge. In other words, no liquid is sprayed out when the plunger pump is in negative pressure mode, resulting in intermittent spraying and poor coating quality. Therefore, to solve this technical problem, this application provides a continuous sprayer and method that can continuously spray paint, helping to improve coating quality and increase spraying efficiency.

[0069] Specifically, the technical concept of this application is to creatively utilize an energy storage device to achieve continuous spraying. That is, the energy storage device in the continuous spraying machine of this application accumulates a portion of the pressurized liquid in an energy storage state when the plunger pump is in a positive pressure working state, and releases the accumulated liquid in an energy release state when the plunger pump is in a negative pressure working state. This allows the paint liquid to be sprayed when the plunger pump is in both the positive pressure working state and the negative pressure working state, thereby truly achieving the effect of continuous spraying and helping to improve the spraying quality.

[0070] Based on this, this application provides a continuous spraying machine suitable for spraying liquid coatings, comprising: a machine body; a plunger pump, wherein the plunger pump is disposed in the machine body and is controlled to reciprocate between a negative pressure operating state and a positive pressure operating state; and an energy storage device, wherein the energy storage device is correspondingly disposed at the outlet of the plunger pump, and the energy storage device has an energy storage state and an energy release state, wherein when the plunger pump is in the positive pressure operating state, the plunger pump pressurizes the liquid coating within the pump to flow out through the outlet of the plunger pump, and the energy storage device is in the energy storage state to accumulate a portion of the pressurized liquid coating to spray out another portion of the pressurized liquid coating; wherein when the plunger pump is in the negative pressure operating state, the plunger pump draws in the liquid coating through the inlet of the plunger pump under negative pressure, and the energy storage device is in the energy release state to release the accumulated liquid coating to spray out the released liquid coating.

[0071] illustrative examples

[0072] Referring to the accompanying drawings of this invention Figures 1 to 12 An embodiment of the present invention provides a continuous spraying machine 1 suitable for spraying paint liquid, wherein the continuous spraying machine 1 may include a machine body 10, a plunger pump 20, and an energy storage device 30. The plunger pump 20 is disposed on the machine body 10, and the plunger pump 20 is controlled to reciprocate between a negative pressure operating state 2001 and a positive pressure operating state 2002. The energy storage device 30 is correspondingly disposed at the outlet 202 of the plunger pump 20, and the energy storage device 30 has an energy storage state 301 and an energy release state 302. When the plunger pump 20 is in the positive pressure operating state 2002, the plunger pump 20 pressurizes the liquid in the pump so that it flows out through the outlet 202 of the plunger pump 20, and the energy storage device 30 is in the energy storage state 301 to accumulate a portion of the pressurized liquid so as to spray out another portion of the pressurized liquid. When the plunger pump 20 is in the negative pressure operating state 2001, the plunger pump 20 draws in the liquid under negative pressure through the inlet 201 of the plunger pump 20, and the energy storage device 30 is in the energy release state 2002 to release the accumulated liquid so as to spray out the released liquid.

[0073] It is worth noting that the energy storage state 301 and the energy release state 302 of the energy storage device 30 preferably correspond one-to-one with the positive pressure working state 2002 and the negative pressure working state 2001 of the plunger pump 20, and are switched synchronously. This allows the energy storage device 30 to store energy to temporarily store a portion of the pressurized liquid when the plunger pump 20 is in the positive pressure working state 2002, and to release the temporarily stored liquid when the plunger pump 20 is in the negative pressure working state 2001. Therefore, the continuous spraying machine 1 can spray paint liquid regardless of whether the plunger pump 20 is in the positive pressure working state 2002 or the negative pressure working state 2001, thereby truly achieving the effect of continuous spraying and helping to improve the spraying quality.

[0074] It is understandable that, such as Figure 4 and Figure 5 As shown, when the plunger pump 20 is in the negative pressure working state 2001, a negative pressure is formed inside the plunger pump 20, so that the material liquid is drawn in through the liquid inlet 201 of the plunger pump 20 under the action of pressure difference; while when the plunger pump 20 is in the positive pressure working state 2002, a positive pressure is formed inside the plunger pump 20, so that the material liquid drawn in by the negative pressure is pressurized, and the pressurized material liquid flows out through the liquid outlet 202 of the plunger pump 20.

[0075] Specifically, such as Figure 2 and Figure 3 As shown, according to the above embodiments of this application, the energy storage device 30 may have a variable volume energy storage chamber 300, and the energy storage chamber 300 is adapted to communicate with the liquid outlet 202 of the plunger pump 20. When the energy storage device 30 is in the energy storage state 301, the volume of the energy storage chamber 300 of the energy storage device 30 increases from small to large to accumulate a portion of the pressurized liquid flowing out from the liquid outlet 202, i.e., to accumulate hydraulic potential energy. When the energy storage device 30 is in the energy release state 302, the volume of the energy storage chamber 300 of the energy storage device 30 decreases from large to small to release the accumulated portion of liquid, i.e., to release hydraulic energy.

[0076] Preferably, the volume of the energy storage chamber 300 of the energy storage device 30 is changed by the liquid flowing out through the outlet 202 of the plunger pump 20. That is, when the plunger pump 20 is in the positive pressure working state 202 so that the pressurized liquid flows out from the outlet 202, the pressurized liquid has a high pressure to squeeze the inner wall of the energy storage chamber 300 of the energy storage device 30, so that the volume of the energy storage chamber 300 increases from small to large, which helps to buffer the liquid. The spray pressure of the liquid prevents the spray velocity of the liquid from suddenly increasing. When the plunger pump 20 is in the negative pressure working state 201, the outlet 202 of the plunger pump 20 is blocked and no pressurized liquid flows out. As the liquid is sprayed out, the volume of the energy storage chamber 300 of the energy storage device 30 decreases to release the accumulated liquid, which helps to maintain the spray pressure of the liquid and prevents the spray velocity of the liquid from suddenly decreasing, thereby enabling continuous and uniform spraying.

[0077] More specifically, such as Figure 3As shown, the energy storage device 30 may include a hollow elastic tube 31, wherein the hollow elastic tube 31 is disposed on the body 10, and one end of the hollow elastic tube 31 is connected to the liquid outlet 202 of the plunger pump 20, so that the tube wall of the hollow elastic tube 31 forms the energy storage cavity 300 with variable volume at the liquid outlet 202 of the plunger pump 20. Thus, when the plunger pump 20 is in the positive pressure working state 2002, the pressurized liquid flows out from the outlet 202 of the plunger pump 20 and enters the hollow elastic tube 31. This causes the tube wall of the hollow elastic tube 31 to undergo elastic deformation under the pressure of the liquid, thereby increasing the volume of the energy storage cavity 300. This allows a portion of the liquid flowing out from the outlet 202 to be accumulated, while the other portion of the liquid is sprayed out. When the plunger pump 20 is in the negative pressure working state 2001, the tube wall of the hollow elastic tube 31 returns to its original shape under its own elastic force, causing the volume of the energy storage cavity 300 to decrease. This allows the liquid accumulated in the energy storage cavity 300 to be released and sprayed out, thereby achieving continuous spraying of the liquid.

[0078] Preferably, the wall thickness of the hollow elastic tube 31 is variable, thinning as the pressure of the liquid in the energy storage cavity 300 increases and thickening as the pressure of the liquid in the energy storage cavity 300 decreases. In other words, the volume of the energy storage cavity 300 is determined by the wall thickness of the hollow elastic tube 31. That is, when the energy storage device 30 is in the energy storage state 301, the wall thickness of the hollow elastic tube 31 decreases under the pressure of the liquid to increase the volume of the energy storage cavity 300; while when the energy storage device 30 is in the energy release state 302, the wall thickness of the hollow elastic tube 31 returns to its original state when the liquid is ejected to decrease the volume of the energy storage cavity 300.

[0079] For example, such as Figure 3 As shown, the hollow elastic tube 31 can be, but is not limited to, a polyurethane tube 311. When the plunger pump 20 is in the positive pressure working state 2002, the wall of the polyurethane tube 310 is compressed by the liquid and becomes thinner, increasing the volume of the energy storage cavity 300 to accumulate the liquid, i.e., the energy storage component 30 is in the energy storage state. And when the plunger pump 20 is in the negative pressure working state 2001, the wall of the polyurethane tube 310 thickens to return to its original shape, decreasing the volume of the energy storage cavity 300 to release the liquid, i.e., the energy storage component 30 is in the energy release state. Of course, in other examples of this application, the hollow elastic tube 31 can also be implemented as a tube of other materials, as long as the wall thickness can change under the action of the liquid, which will not be elaborated further in this application.

[0080] According to the above embodiments of this application, as Figure 1 and Figure 6 As shown, the continuous spraying machine 1 may further include a liquid storage container 40, wherein the liquid storage container 40 is connected to the liquid inlet 201 of the plunger pump 20 and is used to store the liquid, so that the plunger pump 20 draws the liquid from the liquid storage container 40 under negative pressure when the negative pressure working state 2001 is in.

[0081] Preferably, such as Figures 7 to 9 As shown, the liquid storage container 40 is implemented as a liquid storage bag 41, wherein the liquid storage bag 41 includes a soft bag body 411 for containing the liquid and a liquid supply port 412 disposed on the soft bag body 411, and the liquid supply port 412 of the liquid storage bag 41 is adapted to communicate with the liquid inlet 201 of the plunger pump 20. Thus, when the plunger pump 20 is in the negative pressure operating state 2001, a negative pressure is formed inside the plunger pump 20, so that while the liquid is negatively drawn out from the liquid storage bag 41, the soft bag body 411 of the liquid storage bag 41 will collapse due to the liquid being drawn out by the negative pressure; while when the plunger pump 20 is in the positive pressure state, a positive pressure is formed inside the plunger pump 20, so that the liquid drawn out by the negative pressure is pressurized, and the pressurized liquid flows out through the liquid outlet 202 of the plunger pump 20.

[0082] It is worth noting that, in the above example of this application, the soft bag body 411 of the liquid storage bag 41 can be made of a flexible material. This ensures that while the liquid stored in the liquid storage bag 41 is being drawn out by the plunger pump 20 under negative pressure, the soft bag body 411 of the liquid storage bag 41 will deform and deflate under the action of external atmospheric pressure. In this way, external air does not need to enter the liquid storage bag 41, and the liquid storage bag 41 can maintain the pressure balance inside and outside the bag. This not only does not hinder the plunger pump 20 from drawing out the liquid from the liquid storage bag 41 under negative pressure, but also completely prevents air from mixing into the liquid drawn out under negative pressure, thus preventing intermittent spraying.

[0083] Of course, in other examples of this application, the liquid storage container 40 can also be implemented as a conventional storage bottle, so that the continuous spraying machine 1 can still achieve continuous spraying when the liquid is supplied to the plunger pump 20 through the storage bottle. It is understood that since the sprayed liquid is usually very viscous, a large amount of liquid usually adheres to the inner wall of the existing storage bottle and cannot be sucked out and used, which will cause huge waste and is difficult to clean. Although the inner wall of the liquid storage bag 41 of this application also has liquid adhering to it, as the liquid in the bag is sucked out by negative pressure, the external atmospheric pressure acts on the outer wall of the liquid storage bag 41 to squeeze the soft bag body 411 into a deflated state. In this way, the liquid adhering to the inner wall of the liquid storage bag 41 will be squeezed by the soft bag body 411 to gather towards the liquid supply port 412, so as to make full use of the liquid and avoid waste.

[0084] Specifically, according to the above embodiments of this application, such as Figure 7 and Figure 9 As shown, the flexible bag body 411 of the liquid storage bag 41 can be, but is not limited to, formed by heat-sealing two pieces of plastic film, which has a simple manufacturing process and low manufacturing cost. Thus, when not filled with liquid, the flexible bag body 411 of the liquid storage bag 41 is sheet-like, making it easy to carry; however, when filled with liquid, the flexible bag body 411 of the liquid storage bag 41 expands to store a larger amount of liquid; subsequently, during the negative pressure extraction of liquid, the flexible bag body 411 of the liquid storage bag 41 deflates to maintain pressure balance inside and outside the bag while preventing air from entering, until the liquid is completely extracted and the bag becomes sheet-like again. It is understood that the flexible material used to prepare the flexible bag body 411 can be, but is not limited to, polymeric materials such as resin or fiber, composite materials, or other materials that can be made into films; this application will not elaborate further on this.

[0085] More specifically, such as Figure 9 As shown, the liquid storage bag 41 is disposed on the body 10, and the liquid supply port 412 of the liquid storage bag 41 is directly connected to the liquid inlet 201 of the plunger pump 20, so as to supply airless liquid to the plunger pump 20 through the liquid storage bag 41.

[0086] In one example of this application, such as Figure 6 As shown, the liquid storage bag 41 is detachably installed on the machine body 10, and the liquid supply port 42 of the liquid storage bag 41 is detachably connected to the liquid supply port 201 of the plunger pump 20, so as to facilitate the installation and removal of the liquid storage bag 41. This allows for the replacement of the liquid storage bag 41 containing different liquids as needed, and facilitates the expansion of the application scenarios of the continuous spraying machine 1, such as spraying waterproofing or paint. It is understood that the liquid storage bag 41 can be, but is not limited to, being locked onto the machine body 10.

[0087] Preferably, such as Figure 8 As shown, the liquid storage bag 41 further includes a bag opening 413 and a bag cap 414 disposed on the flexible bag body 411. The bag cap 414 is adapted to be detachably sealed to the bag opening 413, so that new liquid can be filled into the flexible bag body 411 through the bag opening 413 without disassembling the liquid storage bag 41, facilitating the reuse of the liquid storage bag 41 and saving resources. Of course, in other examples of this application, even if the liquid storage bag 41 is not detachable from the machine body 10, different liquids can still be replaced through the bag opening 413, allowing the continuous spraying machine 1 to adapt to different application scenarios. It is understood that the bag cap 414 may, but is not limited to, be screwed to the bag opening 413 of the liquid storage bag 41.

[0088] More preferably, such as Figure 9 As shown, the liquid storage bag 41 is adapted to be positioned above the plunger pump 20, allowing the liquid in the storage bag 41 to flow towards the plunger pump 20 under its own weight. This helps the plunger pump 20 draw liquid out from the storage bag 41 under negative pressure, reducing the resistance to negative pressure suction and improving the liquid supply efficiency. It is understood that in other examples of this application, the liquid storage bag 41 can also be located to the side or even below the plunger pump 20, eliminating the need for a suction tube inserted into the storage bag 41 to achieve negative pressure suction by the plunger pump 20.

[0089] For example, such as Figure 9 As shown, the liquid supply port 412 of the liquid storage bag 41 is located at the lower part of the soft bag body 411, and the liquid inlet 201 of the plunger pump 20 is located at the upper part of the pump body of the plunger pump 20. Thus, when the liquid supply port 412 of the liquid storage bag 41 is connected to the liquid inlet 201 of the plunger pump 20, the liquid storage bag 41 is above the plunger pump 20, which facilitates the negative pressure suction of the plunger pump 20 by the weight of the liquid itself.

[0090] It is worth noting that in existing airless sprayers, the storage bottle is usually located below the plunger pump, and the storage bottle, in conjunction with the handle, supports the entire machine body, allowing the existing airless sprayer to stand upright. However, existing airless sprayers cannot stand upright after the storage bottle is removed. Therefore, when changing the storage bottle or adding new liquid, the existing airless sprayer must lie flat, easily contaminating the nozzles and severely affecting subsequent spraying quality. In contrast, the liquid storage bag 41 of this application is installed above the machine body 10, ensuring that the center of gravity of the machine body 10 does not shift significantly before and after the liquid storage bag 41 is removed. Therefore, the continuous sprayer 1 can stand stably using the handle of the machine body 10 before and after removing the liquid storage bag 41, preventing the nozzles of the continuous sprayer 1 from contacting the ground and becoming contaminated.

[0091] For example, such as Figure 1 and Figure 2As shown, the body 10 of the continuous spraying machine 1 may include a housing 11, a handle 12 extending downward from the housing 11, and a switch assembly 13 disposed on the handle 12. The plunger pump 20 is disposed within the housing 11, and the liquid storage bag 41 is mounted on the housing 11. The switch assembly 13 is disposed on the handle 12 and is controllably connected to the plunger pump 20 for manually controlling the opening and closing of the plunger pump 20. This allows the user to manually trigger the switch assembly 13 to control the operation of the plunger pump 20 while holding the handle 12, facilitating one-handed operation of the continuous spraying machine 1. For example, the continuous spraying machine 1 may be pistol-shaped to function as a spray gun, allowing for one-handed spraying operations.

[0092] In addition, such as Figure 2 As shown, the body 10 of the continuous spraying machine 1 further includes a power supply device 14, wherein the power supply device 14 is disposed on the handle 12, and the power supply device 14 is electrically connected to the plunger pump 20 for supplying power to the plunger pump 20, so that the plunger pump 20 switches back and forth between the negative pressure working state 2001 and the positive pressure working state 2002.

[0093] Specifically, such as Figure 2 As shown, the switching assembly 13 of the body 10 includes a main switch 131 disposed in the circuit between the plunger pump 20 and the power supply device 14, and a switch trigger 132 movably disposed on the handle 12, wherein the switch trigger 132 is actuated to trigger the opening and closing of the main switch 131, so that the circuit between the plunger pump 20 and the power supply device 14 is closed or opened, so that the plunger pump 20 starts or stops working.

[0094] For example, such as Figure 2 and Figure 6 As shown, the power supply device 14 may include, but is not limited to, a battery pack 141 mounted on the handle 12, wherein the battery pack 141 is electrically connected to the plunger pump 20 to provide power to the plunger pump 20. Of course, in other examples of this application, the power supply device 14 may be implemented as a power plug or power socket for electrically connecting to an external power source, thereby connecting the external power source and the plunger pump 20 and similarly providing power to the plunger pump 20.

[0095] Preferably, such as Figure 2 and Figure 6As shown, the battery pack 14 of the power supply device 14 is detachably mounted on the handle 12 so that when the battery pack 141 is mounted on the handle 12, the battery pack 12 can be electrically connected to the plunger pump 20, and when the battery pack 141 is removed from the handle 12, it is convenient to charge the battery pack 141 or replace it with a new battery pack.

[0096] According to the above embodiments of this application, as Figure 2 and Figure 3 As shown, the plunger pump 20 may include a motor 21 that is electrically connected to the power supply device 14, a pump body 22 having the inlet 201 and the outlet 202, a plunger rod 23 that is movably disposed within the pump body 22, and a transmission mechanism 24 that is tractably connected to the motor 21 and the plunger rod 23. Thus, when the power supply device 14 provides electrical energy to the motor 21, the motor 21 operates to drive the plunger rod 23 to reciprocate within the pump body 22 via the transmission mechanism 24. When the plunger rod 23 is driven to move backward, the plunger pump 20 is in the negative pressure operating state 2001, creating a negative pressure within the pump body 22 to draw liquid out from the storage bag 41 through the inlet 201. When the plunger rod 23 is driven to move forward, the plunger pump 20 is in the positive pressure operating state 2002, creating a positive pressure within the pump body 22 to pressurize the liquid within the pump body 22, allowing the pressurized liquid to be ejected from the outlet 202.

[0097] For example, the transmission mechanism 24 of the plunger pump 20 may include, but is not limited to, a transmission gear, wherein the transmission gear meshes with the output shaft gear of the motor 21, and the conventional gear is connected to the plunger rod 23 so that when the motor 21 is working, the transmission gear is driven to drive the plunger rod 23 to reciprocate within the pump body 22.

[0098] In addition, such as Figure 4 and Figure 5As shown, the plunger pump 20 may further include an inlet valve assembly 25 disposed at the inlet 201 and an outlet valve assembly 26 disposed at the outlet 202. When the plunger pump 20 is in the negative pressure operating state 2001, the outlet valve assembly 26 is used to block the outlet 202 to create a negative pressure environment within the pump body 22 of the plunger pump 20, and the inlet valve assembly 25 is used to open the inlet 201 to open the flow channel between the storage bag 41 and the plunger pump 20, allowing the storage bag 41 to... The liquid material in 1 is drawn out by the plunger pump 20 under negative pressure and flows into the pump body 22 from the inlet 201. When the plunger pump 20 is in the positive pressure working state 2002, the inlet valve assembly 25 is used to block the inlet 201 to form a positive pressure environment in the pump body 22 of the plunger pump 20, so that the liquid material drawn out under negative pressure is pressurized in the pump body 22, and the outlet valve assembly 26 is used to open the outlet 202, so that the pressurized liquid material is sprayed out from the outlet 202 for spraying operation.

[0099] It is understood that the inlet valve assembly 25 and the outlet valve assembly 26 of the plunger pump 20 may, but are not limited to, include a one-way valve consisting of a valve ball and a spring, wherein the inlet valve assembly 25 allows liquid to flow from outside the pump into the pump, but prevents liquid from flowing from inside the pump out of the pump; while the outlet valve assembly 26 allows liquid to flow from inside the pump out of the pump, but prevents liquid from flowing from outside the pump into the pump.

[0100] It is worth noting that, such as Figure 3 and Figure 10 As shown, the plunger pump 20 may further include a lubrication sleeve 27 disposed between the pump body 22 and the plunger rod 23 for applying lubricating oil between the plunger rod 23 and the pump body 22, which helps to reduce the friction of the plunger rod 23 when it moves within the pump body 22.

[0101] Specifically, the lubricating sleeve 27 is fixed to the pump body 22 and is sleeved on the plunger rod 23 so that when the plunger rod 23 reciprocates within the pump body 22, the lubricating sleeve 27 is used to apply lubricating oil to the surface of the plunger rod 23.

[0102] More specifically, such as Figure 10 and Figure 11As shown, the lubrication sleeve 27 has an inner annular oil reservoir 271 and an end face oil reservoir 272, with the inner annular oil reservoir 271 surrounding the surface of the plunger rod 23. Thus, when the lubricating oil in the inner annular oil reservoir 271 of the lubrication sleeve 27 decreases due to application, the lubricating oil stored in the end face oil reservoir 272 of the lubrication sleeve 27 will be carried to the inner annular oil reservoir 271 during the reciprocating motion of the plunger rod 23, thereby replenishing the inner annular oil reservoir 271 with lubricating oil. It is understood that since the end face oil reservoir 272 is located on the end face of the lubrication sleeve 27 and is not obstructed by the plunger rod 23, new lubricating oil can be easily added to the end face oil reservoir 272, thereby replenishing the inner annular oil reservoir 271 through the end face oil reservoir 272.

[0103] Preferably, the volume of the end-face oil reservoir 272 is larger than the volume of the inner ring oil reservoir 271, so as to supply lubricating oil to the inner ring oil reservoir 271 for a longer period of time. In particular, the end-face oil reservoir 272 is connected to the inner ring oil reservoir 271, so that the lubricating oil stored in the end-face oil reservoir 272 can flow into the inner ring oil reservoir 271, so as to better supply lubricating oil to the inner ring oil reservoir 271.

[0104] More preferably, the lubrication sleeve 27 is made of copper to provide strong wear resistance. Of course, in other examples of this application, the lubrication sleeve 27 may also be made of other materials.

[0105] According to the above embodiments of this application, as Figure 1 and Figure 6 As shown, the body 10 of the continuous spraying machine 1 may further include a nozzle assembly 15, wherein the nozzle assembly 15 is correspondingly disposed at the liquid outlet 202 of the plunger pump 20, for dispersing the liquid flowing from the liquid outlet 202 of the plunger pump 20 into a mist for uniform spraying. It is understood that the nozzle assembly 15 may be detachably mounted to the housing 11, or the nozzle assembly 50 may be integrally formed into the housing 11, as long as it corresponds to the liquid outlet 202 of the plunger pump 20; this application will not elaborate further on this.

[0106] Specifically, the nozzle assembly 15 may include a nozzle head 151 and a nozzle valve 152, wherein the nozzle valve 152 is correspondingly mounted to the pump body 22 of the plunger pump 20 to correspond to the liquid outlet 202 of the plunger pump 20, and the nozzle head 151 is detachably mounted to the nozzle valve 152 to open or close the spraying channel of the nozzle head 151 through the nozzle valve 152.

[0107] It is worth noting that the energy storage device 30 of this application is preferably located between the liquid outlet 202 of the plunger pump 20 and the nozzle assembly 15. When the plunger pump 20 is in the positive pressure working state 2002 to pressurize the liquid and allow it to flow out from the liquid outlet 202, the energy storage device 30 will be in the energy storage state 302, so that a portion of the pressurized liquid is stored in the energy storage assembly 30 and another portion of the pressurized liquid will be ejected from the nozzle assembly 15. When the plunger pump 20 is in the negative pressure working state 2001, the energy storage device 30 is in the energy release state 301, so that the stored liquid is released and ejected from the nozzle assembly 15.

[0108] In particular, in other examples of this application, the energy storage device 30 may further include a pair of coupling mechanisms disposed at both ends of the hollow elastic tube 31, wherein the coupling mechanisms are adapted to be compatible with the liquid outlet head and nozzle of the plunger pump in an existing spraying machine, so that the hollow elastic tube 31 can be directly installed between the liquid outlet head and nozzle of the plunger pump in the existing spraying machine through the coupling mechanisms, which facilitates continuous spraying without changing the original structure of the spraying machine, helps to reduce the retrofit cost of the existing spraying machine and improve the spraying quality.

[0109] According to the above embodiments of this application, as Figure 2 and Figure 3 As shown, the body 10 of the continuous spraying machine 1 may further include a pressure relief assembly 16, wherein the pressure relief assembly 16 is used to relieve pressure on the plunger pump 20 to prevent the plunger pump 20 from maintaining high pressure when it is not working, which helps to extend the service life of the plunger pump 20.

[0110] Specifically, the pressure relief assembly 16 includes a pressure relief valve 161 disposed at the pressure relief port 203 of the plunger pump 20, for opening or blocking the pressure relief port 203 of the plunger pump 20. When the pressure relief valve 161 is controlled to block the pressure relief port 203 of the plunger pump 20, the continuous spraying machine 1 can perform spraying operations normally. When the pressure relief valve 161 is controlled to open the pressure relief port 203 of the plunger pump 20, the plunger pump 20 will be depressurized through the pressure relief port 203. Although the continuous spraying machine 1 cannot perform normal spraying operations at this time, the high pressure inside the plunger pump 20 can be released so that the plunger pump 20 can be maintained or repaired in the future. Specifically, when the pressure relief valve 161 is controlled to open the pressure relief port 203 of the plunger pump 20, even if the plunger pump 20 is still operating, the pressurized liquid will not flow out from the outlet port 202 of the plunger pump 20, but will flow out from the pressure relief port 203 of the plunger pump 20, making normal spraying impossible, but cleaning operations are still possible.

[0111] More specifically, such as Figure 6 As shown, the pressure relief assembly 16 includes a pressure relief channel 162, wherein the pressure relief channel 162 is connected to the pressure relief port 203 of the plunger pump 20 and the return port 415 of the liquid storage bag 41, so that after the pressure relief port 203 of the plunger pump 20 is opened, the liquid in the plunger pump 20 can flow back to the liquid storage bag 41 through the pressure relief channel 162 to avoid waste of liquid.

[0112] Preferably, the pressure relief channel 162 extends from the pressure relief port 203 of the plunger pump 20 to the liquid inlet valve assembly 25 of the plunger pump 20, and the return port 415 of the liquid storage bag 41 is adjacent to the liquid supply port 412 of the liquid storage bag 41. Thus, when the liquid storage bag 41 is installed on the machine body 10, the liquid supply port 412 and the return port 415 of the liquid storage bag 41 are respectively connected to the liquid inlet valve assembly 25 of the plunger pump 20 and the pressure relief channel 162 of the pressure relief assembly 16, so that the liquid supply port 412 and the return port 415 of the liquid storage bag 41 are respectively connected to the liquid inlet 201 and the pressure relief port 203 of the plunger pump 20.

[0113] For example, such as Figure 2 and Figure 12As shown, the pressure relief assembly 16 may further include a pressure relief valve trigger 163 for controlling the opening and closing of the pressure relief valve 161, wherein the pressure relief valve trigger 163 is movably disposed in the housing 11, and the pressure relief valve trigger 163 can be driven to move to a first position 1601 and a second position 1602, wherein when the pressure relief valve trigger 163 is moved to the first position 1601, the pressure relief valve trigger 163 controls the pressure relief valve 161 to block the pressure relief port 203 of the plunger pump 20, so that the continuous spraying machine 1 can spray normally; and when the pressure relief valve trigger 163 is moved to the second position 1602, the pressure relief valve trigger 163 controls the pressure relief valve 161 to open the pressure relief port 203 of the plunger pump 20, so that the plunger pump 20 of the continuous spraying machine 1 can depressurize.

[0114] Preferably, such as Figure 12 As shown, the pressure relief valve trigger 163 can be further driven to move to a third position 1603, so that while controlling the pressure relief valve 161 to open the pressure relief port 203 of the plunger pump 20, the switch trigger 132 of the switch assembly 13 is activated, causing the main switch 131 to close and start the plunger pump 20, thereby realizing the cleaning process of the continuous spraying machine 1.

[0115] More preferably, the pressure relief valve trigger 163 is pivotally connected to the housing 11 near the switch assembly 13, wherein when the pressure relief valve trigger 163 is rotated to the third position 1603, the pressure relief valve trigger 163 directly actuates the switch trigger 132 to activate the plunger pump 20. Thus, when the pressure relief valve trigger 163 is in the third position 1603, the pressure relief valve 161 is controlled to open the pressure relief port 203 of the plunger pump 20, and the main switch 131 is triggered to activate the plunger pump 20, thereby initiating the cleaning process. This eliminates the need to continuously hold down the switch trigger by hand during the cleaning process, as is required with existing spray guns.

[0116] According to the above embodiments of this application, as Figure 1 and Figure 6 As shown, the body 10 of the continuous spraying machine 1 may further include a lighting device 17, wherein the lighting device 17 is disposed on the housing 11 of the body 10 for emitting illumination light to illuminate the spraying area, so that the user can observe the spraying area or the spraying effect in a dim or dark environment.

[0117] For example, such as Figure 2As shown, the lighting device 17 may include a light source 171 and a lighting switch 172 that are electrically connected to the power supply device 14. The light source 171 is mounted on the front end of the housing 11 and is used to emit illumination light along the spraying direction. The lighting switch 172 is used to turn the light source 171 on or off, allowing the user to control the light source 171 to be lit or extinguished as needed. It is understood that the light source 171 may, but is not limited to, be implemented as an LED lamp.

[0118] It is worth mentioning that, attached Figure 13 A first modified embodiment of the continuous spraying machine 1 according to the above embodiments of this application is shown, wherein the wall thickness of the hollow elastic tube 31 of the energy storage device 30 is fixed, but the inner diameter of the hollow elastic tube 31 is variable. That is, the inner diameter of the hollow elastic tube 31 increases as the pressure of the liquid material in the energy storage cavity 300 increases, and decreases as the pressure of the liquid material in the energy storage cavity 300 decreases. In other words, the volume of the energy storage cavity 300 is determined by the inner diameter of the hollow elastic tube 31. That is, when the energy storage device 30 is in the energy storage state 301, the tube wall of the hollow elastic tube 31 expands outward under the pressure of the liquid to increase the inner diameter, thereby increasing the volume of the energy storage cavity 300. When the energy storage device 30 is in the energy release state 302, the tube wall of the hollow elastic tube 31 returns to its original shape when the liquid is ejected to reduce the inner diameter, thereby reducing the volume of the energy storage cavity 300.

[0119] Specifically, the hollow elastic tube 31 is implemented as an expansion tube 312. When the plunger pump 20 is in the positive pressure working state 2002, the expansion tube 312 is squeezed by the liquid and expands, so that the volume of the energy storage chamber 300 increases to store the liquid, that is, the energy storage device 30 is in the energy storage state; and when the plunger pump 20 is in the negative pressure working state 2001, the expansion tube 312 contracts to return to its original state, so that the volume of the energy storage chamber 300 decreases to release the liquid, that is, the energy storage device 30 is in the energy release state.

[0120] For example, when pressurized liquid flows from the outlet 202 of the plunger pump 20 into the expansion tube 312, the wall of the expansion tube 312 expands outward under the pressure of the liquid, increasing the volume of the energy storage chamber 300. Conversely, when the outlet 202 of the plunger pump 20 is blocked, the wall of the expansion tube 312 contracts back to its original shape as the liquid is ejected, reducing the volume of the energy storage chamber 300. It is understood that throughout the expansion and contraction process, the wall thickness of the expansion tube 312 remains essentially constant; rather, the volume of the energy storage chamber 300 is changed by the radial deformation of the wall of the expansion tube 312.

[0121] It is worth noting that, attached Figure 14 A second modified embodiment of the continuous spraying machine 1 according to the above embodiments of this application is shown, wherein the energy storage device 30 may include an energy storage cavity 32 disposed in the machine body 10, a movable member 33 movably disposed in the energy storage cavity 32, and an elastic element 34 for applying an elastic force to the movable member 33, wherein the movable member 33 sealably divides the space within the energy storage cavity 32 to implement the divided space within the energy storage cavity 32 that communicates with the liquid outlet 202 of the plunger pump 20 as the energy storage cavity 300 with a variable volume.

[0122] Thus, when the plunger pump 20 is in the positive pressure operating state 2002, the movable member 33 moves under the pressure of the liquid, causing the elastic element 34 to deform and accumulate elastic potential energy, thereby increasing the volume of the energy storage chamber 300 to store the liquid, i.e., the energy storage device 30 is in the energy storage state; and when the plunger pump 20 is in the negative pressure operating state 2001, the movable member 33 moves back to its original position under the action of the elastic element 34, causing the volume of the energy storage chamber 300 to decrease to release the liquid, i.e., the energy storage device 30 is in the energy release state. It is understood that the elastic element 34 can be, but is not limited to, a compression spring or a tension spring. Furthermore, the movable member 33 can be, but is not limited to, a piston or a separator plate.

[0123] It is worth noting that, although the liquid storage bag 41 in the continuous spraying machine 1 described in the above embodiments is installed on the machine body 10 to be directly connected to the plunger pump 20, so that the continuous spraying machine 1 has an integrated structure, in other embodiments of this application, the liquid storage bag 41 may not be installed on the machine body 10, so that the continuous spraying machine 1 has a split structure. In this case, it is only necessary to transport the liquid in the liquid storage bag 41 to the liquid inlet 201 of the plunger pump 20 through the conveying device.

[0124] For example, Appendix Figure 15A third modified embodiment of the continuous spraying machine 1 according to the above embodiments of this application is shown, wherein the continuous spraying machine 1 further includes a liquid delivery pipe 50, wherein one end of the liquid delivery pipe 50 is connected to the liquid supply port 412 of the liquid storage bag 41, and the other end of the liquid delivery pipe 50 is connected to the liquid inlet 201 of the plunger pump 20, so that when the plunger pump 20 is in the negative pressure working state, the liquid in the liquid storage bag 41 first flows out from the liquid supply port 412 under the action of pressure difference, then flows through the liquid delivery pipe 50 to the liquid inlet 201 of the plunger pump 20, and finally flows from the liquid inlet 201 of the plunger pump 20 into the pump body 22 of the plunger pump 20. It is understood that in this modified embodiment of the present application, the liquid storage bag 41 does not need to be installed on the machine body 10, which helps to significantly reduce the user's carrying weight and reduce the user's labor load.

[0125] It is worth mentioning that, according to another aspect of this application, such as Figure 16 As shown, one embodiment of this application further provides a continuous spraying method, which may include the steps of:

[0126] S100: Start the plunger pump of the continuous spraying machine so that the plunger pump switches back and forth between negative pressure operation and positive pressure operation.

[0127] S200: When the plunger pump is in the positive pressure operating state, a portion of the pressurized liquid is stored in the energy storage device to spray out the other portion of the pressurized liquid; and

[0128] S300: When the plunger pump is in the negative pressure working state, the stored liquid is released through the energy storage device to spray out the released liquid.

[0129] It is understandable that because the energy storage device can accumulate a portion of liquid material when the plunger pump is in the positive pressure working state and release this portion of liquid material when the plunger pump is in the negative pressure working state, the continuous spraying machine can spray liquid material both in the positive pressure working state and in the negative pressure working state to achieve the effect of continuous spraying, which helps to improve the spraying quality.

[0130] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A continuous spraying machine for spraying paint liquid, characterized in that, The continuous spraying machine includes: Organism; A plunger pump, wherein the plunger pump is disposed within the machine body, and the plunger pump is controlled to reciprocate between a negative pressure operating state and a positive pressure operating state; and An energy storage device is provided, wherein the energy storage device is correspondingly disposed at the outlet of the plunger pump, and the energy storage device has an energy storage state and an energy release state. When the plunger pump is in the positive pressure operating state, the plunger pump pressurizes the liquid inside the pump to flow out through the outlet, and the energy storage device is in the energy storage state to accumulate a portion of the pressurized liquid for ejecting the other portion of the pressurized liquid. When the plunger pump is in the negative pressure operating state, the plunger pump draws in the liquid through the negative pressure inlet of the plunger pump, and the energy storage device is in the energy release state to release the accumulated liquid for ejecting the released liquid.

2. The continuous spraying machine as described in claim 1, wherein, The energy storage state and the energy release state of the energy storage device correspond one-to-one with the positive pressure working state and the negative pressure working state of the plunger pump, and are switched synchronously.

3. The continuous spraying machine as described in claim 1, wherein, The energy storage device has a variable-volume energy storage chamber, and the energy storage chamber is connected to the liquid outlet of the plunger pump. When the energy storage device is in the energy storage state, the volume of the energy storage chamber increases from small to large to accumulate the liquid, and when the energy storage device is in the energy release state, the volume of the energy storage chamber decreases from large to small to release the accumulated liquid.

4. The continuous spraying machine as described in claim 3, wherein, The energy storage device includes a hollow elastic tube, wherein the hollow elastic tube is disposed in the body and one end of the hollow elastic tube is connected to the liquid outlet of the plunger pump, so that the wall of the hollow elastic tube forms a variable volume energy storage cavity at the liquid outlet of the plunger pump.

5. The continuous spraying machine as described in claim 4, wherein, The wall thickness of the hollow elastic tube is designed to decrease as the pressure of the liquid in the energy storage cavity increases and increase as the pressure of the liquid in the energy storage cavity decreases.

6. The continuous spraying machine as described in claim 5, wherein, The hollow elastic tube is a polyurethane tube.

7. The continuous spraying machine as described in claim 4, wherein, The inner diameter of the hollow elastic tube is designed to increase as the pressure of the liquid in the energy storage cavity increases, and decrease as the pressure of the liquid in the energy storage cavity decreases.

8. The continuous spraying machine as described in claim 7, wherein, The hollow elastic tube is an expansion tube.

9. The continuous spraying machine as described in claim 3, wherein, The energy storage device includes an energy storage cavity disposed in the substrate, a movable member disposed movably in the energy storage cavity, and an elastic element for applying an elastic force to the movable member, wherein the movable member divides the space within the energy storage cavity into mutually isolated subspaces, thereby defining the energy storage cavity through a subspace within the energy storage cavity that communicates with the outlet of the plunger pump.

10. The continuous spraying machine as described in any one of claims 1 to 9, further comprising a liquid storage container, wherein the liquid storage container is in communication with the inlet of the plunger pump for storing the liquid, such that the plunger pump draws the liquid from the liquid storage container under negative pressure when in the negative pressure operating state.

11. The continuous spraying machine as described in claim 10, wherein, The liquid storage container is a liquid storage bag or a storage bottle.

12. The continuous spraying machine as described in claim 10, wherein, The liquid storage container is detachably installed on the machine body, and the liquid supply port of the liquid storage container is directly connected to the liquid inlet of the plunger pump.

13. The continuous spraying machine as described in claim 12, wherein, The liquid storage container is located above the plunger pump.

14. The continuous spraying machine of claim 10, further comprising a liquid delivery pipe, wherein one end of the liquid delivery pipe is connected to the liquid supply port of the liquid storage container, and the other end of the liquid delivery pipe is connected to the liquid inlet of the plunger pump.

15. The continuous spraying machine as described in any one of claims 1 to 9, wherein, The device includes a housing, a handle extending downward from the housing, and a switch assembly disposed on the handle, wherein the plunger pump is disposed within the housing and the liquid storage bag is mounted on the housing, wherein the power supply device is disposed on the handle, and the switch assembly is controllably connected to the plunger pump for manually controlling the opening and closing of the plunger pump.

16. The continuous spraying machine as described in claim 15, wherein, The machine body further includes a power supply device, wherein the power supply device is disposed on the handle and is electrically connected to the plunger pump for supplying power to the plunger pump, thereby causing the plunger pump to switch back and forth between the negative pressure working state and the positive pressure working state.

17. The continuous spraying machine as described in claim 15, wherein, The body further includes a nozzle assembly, wherein the nozzle assembly is correspondingly disposed at the outlet of the plunger pump, and the energy storage device is located between the outlet of the plunger pump and the nozzle assembly.

18. The continuous spraying machine as described in claim 15, wherein, The body further includes a pressure relief assembly, wherein the pressure relief assembly includes a pressure relief valve disposed at the pressure relief port of the plunger pump and a pressure relief channel for connecting the reflux interface of the liquid storage container and the pressure relief port of the plunger pump, wherein the pressure relief valve of the pressure relief assembly is used to open or block the pressure relief port of the plunger pump.

19. The continuous spraying machine as described in any one of claims 1 to 9, wherein, The plunger pump includes a motor mounted on the machine body, a pump body having the inlet and the outlet, a plunger rod movably mounted on the pump body, and a transmission mechanism tractably connected to the motor and the plunger rod.

20. The continuous spraying machine as described in claim 19, wherein, The plunger pump further includes a lubrication sleeve disposed between the pump body and the plunger rod, wherein the lubrication sleeve has an inner annular oil reservoir and an end face oil reservoir surrounding the surface of the plunger rod.

21. A continuous spraying method, characterized in that, Including the following steps: Start the plunger pump of the continuous spraying machine to switch back and forth between negative pressure and positive pressure operating states; When the plunger pump is in the positive pressure operating state, a portion of the pressurized liquid is stored in the energy storage device to spray out the remaining portion of the pressurized liquid; and When the plunger pump is in the negative pressure working state, the stored liquid is released through the energy storage device to spray out the released liquid.

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