A hand-held high-pressure sprayer

Abstract

The utility model provides a handheld high pressure spraying machine is provided with start -stop valve in front of high pressure outlet of handheld high pressure spraying machine, and the valve needle is controlled to bear valve seat body export through the spring of specific elasticity, can offset spring elasticity and push valve needle to open valve seat body export after pressure reaches predetermined value, can realize specific pressure automatic opening start -stop valve and begin to spray work, need not manual control, convenient to use, and spring is independently arranged in rear cavity and does not contact high pressure material, can effectively solve the accumulation of material on spring and the problem of poor material performance caused by long -term high pressure material of spring, in addition, the planetary gear set transmission mechanism commonly used is designed into reduction bull gear in the aspect of spraying machine body, and the inertia is big, and the swing is small when the reduction bull gear rotates at high speed, and the torque output is more efficient and stable, reduces energy consumption, and the noise is low and the failure rate is low, and maintenance is more convenient, and it is more favorable to popularization and use.

Description

Technical Field

[0001] This utility model relates to the field of spraying equipment technology, and in particular to a handheld high-pressure sprayer. Background Technology

[0002] Large-scale construction projects typically utilize specialized spraying equipment. However, this equipment is inconvenient to move, lacks flexibility, and presents high operational difficulties. Furthermore, it is unsuitable for specific working conditions, such as confined spaces, high-altitude environments, wall repairs, and small work surfaces. To address this issue, various handheld sprayers have emerged. However, existing handheld sprayers require mechanical one-way valves to open the nozzles or mechanical triggers to control springs to open valves. This is inconvenient, and the springs, subjected to prolonged pressure within the material, can degrade material properties and cause valve leaks. Additionally, current handheld sprayers generally use planetary gear sets / multi-stage gear drives between the power mechanism and the pressure pump. These numerous, small gears are prone to vibration and noise at high speeds, resulting in torque loss and making repairs extremely difficult after malfunctions. Therefore, further improvements to the sprayer's structure are necessary. Utility Model Content

[0003] In view of this, the present invention provides a handheld high-pressure sprayer, which addresses the problems of the existing technology by designing a high-pressure start-stop valve and a large reduction gear transmission, thereby solving the existing technical problems.

[0004] The objective of this utility model is achieved through the following technical solution: A handheld high-pressure sprayer includes a sprayer body and a nozzle disposed at the front end of the sprayer body. The nozzle is connected to the high-pressure outlet of the sprayer body via a start / stop valve. The start / stop valve includes a start / stop valve cavity. The cavity is divided into a front cavity and a rear cavity by a partition plate with a central hole. A valve seat is sealed and fixedly disposed on the inner side of the front end of the front cavity. The front side of the valve seat is closed, and a discharge port is disposed at the center of the front side. A valve needle is movably disposed inside the discharge port within the front cavity. The valve needle includes a valve body at its front end and a valve stem disposed on the rear side of the valve body. A sealing seat and a cylindrical seal are fixedly disposed on the front side of the partition plate. An O-ring is disposed around the outer ring of the cylindrical seal. The sealing seat presses against the cylindrical seal and seals the front of the partition plate. On the side, the sealing seat and the center of the cylindrical seal are both provided with a center hole that is in a straight line with the center hole of the partition plate. The valve stem on the rear side of the valve needle is tightly fitted and can move through the center holes of the sealing seat, the cylindrical seal, and the partition plate in sequence, and then extend into the rear cavity and the rear end is fixedly connected to the support seat. The support seat is movably fitted and is provided in the rear cavity, and a boss is provided on the rear side of the support seat. A spring seat is sealed and fixedly provided on the inner side of the rear end of the rear cavity. A boss is provided on the front side of the spring seat. A spring is provided between the boss and the boss. The front end of the spring is sleeved on the outside of the boss and abuts against the support seat. The rear end of the spring is sleeved on the outside of the boss and abuts against the spring seat. At least one channel is provided on the side wall of the rear cavity of the start / stop valve cavity to communicate with the front cavity. The valve stem on the rear side of the valve needle is pushed forward by the spring force, and the valve body at the front end of the valve needle abuts against the discharge port at the center of the front side of the sealing valve seat. The front end of the front cavity is sealed and connected to the nozzle, and the rear end of the rear cavity is sealed and connected to the high pressure outlet of the spraying machine body. The high pressure outlet of the spraying machine body is connected to the front cavity through a channel.

[0005] Furthermore, a sealing gasket and a valve seat are sequentially fixed on the inner outer ring of the discharge port, and the valve body at the front end of the valve needle abuts against the valve seat to seal the discharge port.

[0006] Furthermore, a boss three is provided on the front side of the sealing seat, and a spring two is provided between the boss three and the valve body. The spring two is sleeved on the outside of the valve stem and its front end abuts against the valve body, and the rear end of the spring two is sleeved on the outside of the boss three and abuts against the sealing seat.

[0007] Furthermore, a cup-shaped seal is recessed inward on the rear end face of the sealing seat, and a hole is provided in the center of the cup-shaped seal to fit through the valve stem.

[0008] Furthermore, the spraying machine body is a handheld dual-plunger spraying machine.

[0009] Furthermore, the handheld dual-plunger sprayer includes a housing, which includes a lower cover and an upper cover fixed to the lower cover. A component receiving cavity is formed between the upper and lower covers for installing various components of the sprayer. A battery is located at the lower rear side of the housing, and a liquid bottle is located at the lower front side of the housing. A motor is fixedly mounted on the rear section of the component receiving cavity of the housing via a bracket. A push-button switch is located below the motor. The motor is electrically connected to the push-button switch via a wire, and the push-button switch is electrically connected to the battery via a wire. A large reduction gear is rotatably mounted at the front end of the bracket, meshing with a power gear on the motor output shaft. Two staggered gears are located on the upper and lower sides of the large reduction gear. The eccentric shafts, which are staggered front and rear, are connected by a connecting rod and equipped with plungers. The front section of the housing component is fixedly provided with a double-hole pumping chamber. The double-hole pumping chamber is provided with an upper chamber hole and a lower chamber hole. The upper and lower chamber holes are respectively sealed and inserted with corresponding upper and lower plungers. The lower side of the lower chamber hole is connected to the liquid bottle through a lower one-way valve that opens into the lower chamber hole. The front end of the lower chamber hole is connected to the upper chamber hole through a connecting passage. The lower end of the connecting passage located in the lower chamber hole is closed by a spring valve needle. The front end of the upper chamber hole is the high-pressure outlet of the spraying machine body, and its inner side is fixedly and sealed to the outer side of the rear end of the start-stop valve chamber, and is connected to the front chamber through a channel.

[0010] Furthermore, the battery is detachably mounted on the lower rear side of the housing, and a power contact is provided on the lower rear side of the housing. A battery contact is provided on the upper side of the battery, and the battery is electrically connected to the power contact through the battery contact. The push-button switch is electrically connected to the power contact through a wire.

[0011] Furthermore, the push-button switch includes a button that can be slidably disposed on the inner side of the rear end of the housing, and a touch switch that is fixedly disposed on the rear side of the button and contacts the button for press control. The two ends of the touch switch are electrically connected to the motor and the battery respectively through wires.

[0012] The beneficial effects of this utility model are as follows: This invention features a start / stop valve installed before the high-pressure outlet of a handheld high-pressure sprayer. The valve contains a front chamber and a rear chamber. A valve needle, propelled by a spring isolated in the rear chamber, moves within the front chamber. The front chamber is independently connected to the high-pressure outlet via a channel, preventing the high-pressure liquid from passing through the rear chamber. A spring with specific elasticity controls the valve needle to press against the valve seat outlet. When the pressure reaches a predetermined value, the spring force is counteracted, pushing the valve needle to open the valve seat outlet. This allows for automatic start / stop valve activation at specific pressures, initiating spraying without manual control, making it convenient to use. Furthermore, the spring's independent placement within the rear chamber prevents contact with the high-pressure material, effectively preventing material buildup on the spring and addressing the issue of material degradation caused by prolonged contact with the high-pressure material. In addition, regarding the body of the spraying machine, the commonly used planetary gear transmission mechanism is designed as a large reduction gear. The large reduction gear has large inertia and small oscillation when rotating at high speed, resulting in more efficient and stable torque output, reduced energy consumption, low noise and low failure rate, and more convenient maintenance, which is more conducive to its widespread use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the handheld high-pressure sprayer in this utility model; Figure 2 This is a schematic diagram showing the disassembled start / stop valve in this utility model; Figure 3 This is a schematic diagram of the axial cross-section of the start-stop valve in this utility model; Figure 4 This is a schematic diagram of the axial cross-section of the start-stop valve in this utility model when it is open; Figure 5 This is a schematic diagram showing the disassembled handheld high-pressure sprayer of this utility model.

[0014] The annotations in the attached figures are explained as follows: Spray painting machine body 10, outer shell 11, lower cover 111, upper cover 112, battery 12, liquid bottle 13, bracket 14, motor 15, power gear 151, push button switch 16, button 161, touch switch 162, reduction gear 17, eccentric shaft 171, connecting rod 18, plunger 19, double-hole pumping chamber 110, upper chamber hole 1101, lower chamber hole 1102, lower one-way valve 1103, connecting passage 1104, spring valve needle 1105, nozzle 20, start Stop valve 30, start / stop valve cavity 31, front cavity 311, rear cavity 312, channel 313, partition plate 32, valve seat body 33, discharge port 331, sealing gasket 3311, valve seat 3312, valve needle 34, valve body 341, valve stem 342, sealing seat 35, boss three 351, cup seal 352, column seal 36, O-ring 361, support seat 37, boss one 371, spring seat 38, boss two 381, spring one 39, spring two 310. Detailed Implementation

[0015] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0016] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0017] In order to achieve automatic start and stop, improve valve life, reduce noise of the spraying machine body, and improve torque output efficiency, the specific contents of this utility model are as follows.

[0018] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of this utility model is a handheld high-pressure sprayer, including a sprayer body 10 and a nozzle 20 disposed at the front end of the sprayer body 10. Importantly, the nozzle 20 is connected to the high-pressure outlet of the spraying machine body 10 via the start-stop valve 30. The start-stop valve 30 includes a start-stop valve cavity 31. The inner cavity of the start-stop valve cavity 31 is divided into a front cavity 311 and a rear cavity 312 by a partition plate 32 with a central hole. A valve seat 33 is sealed and fixedly installed on the inner side of the front end of the front cavity 311. The front side of the valve seat 33 is closed, and a discharge port 331 is provided at the center of the front side. The inner side of the discharge port 331 is located inside the front cavity 311. A valve needle 34 is movably mounted, comprising a valve body 341 at its front end and a valve stem 342 located at the rear of the valve body 341. A sealing seat 35 and a cylindrical seal 36 are fixedly mounted on the front side of the partition plate 32. An O-ring 361 is provided on the outer ring of the cylindrical seal 36 for sealing the side. The sealing seat 35 presses against the cylindrical seal 36 to seal the front side of the partition plate 32. Both the sealing seat 35 and the cylindrical seal 36 have a center hole that is aligned with the center hole of the partition plate 32. The valve stem 342 on the rear side of the valve needle 34 is tightly fitted and can move through the hole in the center of the sealing seat 35, the cylindrical seal 36, and the partition plate 32 in sequence before extending into the rear cavity 312 and its rear end is fixedly connected to the support seat 37. The support seat 37 is movably fitted and tightly disposed in the rear cavity 312 and has a boss 371 on its rear side. A spring seat 38 is sealed and fixedly disposed on the inner side of the rear end of the rear cavity 312. A boss 381 is disposed on the front side of the spring seat 38. The boss 371 and the boss 381 are connected to the spring seat 312. A spring 39 is provided between the two platforms 381. The front end of the spring 39 is sleeved on the outside of the boss 371 and abuts against the support seat 37. The rear end of the spring 39 is sleeved on the outside of the boss 381 and abuts against the spring seat 38. At least one channel 313 is provided on the side wall of the rear cavity 312 of the start-stop valve cavity 31, which is connected to the front cavity 311. Here, four channels 313 are generally evenly distributed on the side wall to connect to the front cavity 311, so as to ensure a certain flow rate and uniform force. The valve stem 342 on the rear side of the valve needle 34 is pushed forward by the elastic force of the spring 39, and the valve body 341 at the front end of the valve needle 34 abuts against the discharge port 331 at the center of the front side of the sealing valve seat 33. The front outer side of the front cavity 311 is sealed inside and connected to the nozzle 20, and the rear outer side of the rear cavity 312 is sealed inside the high pressure outlet of the spraying machine body 10. The high pressure outlet of the spraying machine body 10 is connected to the front cavity 311 through the channel 313.

[0019] The specific working principle is as follows: when the pressure generated by the spring force setting device reaches 50 bar, the start / stop valve 30 is opened. High-pressure material enters the front chamber 311 through the channel 313. When the pressure in the front chamber 311 increases to 30-50 bar, it pushes the valve needle 34 and the rear spring 39 of the valve needle 34 backward (the spring force setting data is consistent with the pushing pressure of the front chamber). The valve needle 34 moves backward to open the discharge port 331 to form an open state. The high-pressure material enters the nozzle 20 for spraying through the front chamber 311. The nozzle 20 forms high-pressure atomization and discharge, while changing the atomization angle and controlling the flow rate. Then, when the device is shut down, when the pressure is released from 50-30 bar, the thrust of the spring 39 in the rear chamber 312 is greater than the front pressure, pushing the valve needle 34 forward to close the gap between the valve needle 34 and the discharge port 331, forming a closed state, thus realizing automatic start / stop at a specific pressure.

[0020] The main feature of this invention is that a start / stop valve 30 is installed before the high-pressure outlet of a handheld high-pressure sprayer. The start / stop valve 30 has a front cavity 311 and a rear cavity 312 inside. A valve needle 34 is installed in the front cavity 311 and is provided with elastic force by a spring 39 that is isolated in the rear cavity 312. The front cavity 311 is independently connected to the high-pressure outlet through a channel 313. The high-pressure liquid does not pass through the rear cavity 312. The valve needle 34 is controlled by the spring 39 with a specific elastic force to press against the outlet of the valve seat 33. When the pressure reaches a predetermined value, the elastic force of the spring 39 can be offset to push the valve needle 34 to open the outlet of the valve seat 33. This can realize the automatic opening of the start / stop valve 30 at a specific pressure to start the spraying work without manual control, which is convenient to use. Moreover, the spring 39 is independently installed in the rear cavity 312 and does not come into contact with the high-pressure material. This can effectively solve the problem of material accumulation on the spring 39 and the problem of material performance deterioration caused by the spring 39 being in the high-pressure material for a long time.

[0021] Furthermore, in some embodiments, such as Figure 2 and Figure 3 As shown, in order to further improve the sealing performance of the discharge port, a sealing gasket 3311 and a valve seat 3312 are fixedly installed on the inner outer ring of the discharge port 331 in sequence. The valve body 341 at the front end of the valve needle 34 abuts against the valve seat 3312 to seal the discharge port 331. The sealing gasket 3311 and the valve seat 3312 are generally made of soft rubber material. The valve seat 3312 works in conjunction with the sealing gasket 3311 to achieve better sealing performance when the valve body 341 abuts against it.

[0022] Furthermore, in some embodiments, such as Figure 2 and Figure 3As shown, in order to provide better preload force to the valve needle 34, a boss 351 is provided on the front side of the sealing seat 35. A spring 310 is also provided between the boss 351 and the valve body 341. The spring 310 is sleeved on the outside of the valve stem 342 and its front end abuts against the valve body 341. The rear end of the spring 310 is sleeved on the outside of the boss 351 and abuts against the sealing seat 35. The spring 310, together with the spring 39, can provide better preload force to the valve needle 34. Furthermore, when the valve needle 34 is closed, it can provide better forward force to seal the discharge port 331. Of course, the elasticity of the spring 310 and the spring 39 needs to be set according to the pressure value required for opening.

[0023] Furthermore, in some embodiments, such as Figure 2 and Figure 3 As shown, in order to further improve the sealing performance between the valve stem 342 and the central hole of the sealing seat 35, a cup-shaped seal 352 is recessed inward on the rear end face of the sealing seat 35. The center of the cup-shaped seal 352 is provided with a hole that fits tightly through the valve stem 342. The conical structure of the cup-shaped seal 352 is tightened inward. The central hole can deform to a certain extent as the valve stem 342 moves, so as to better ensure the sealing performance between the cup-shaped seal 352 and the valve stem 342.

[0024] More specifically, in some embodiments, such as Figure 5 As shown, the spraying machine body 10 is a handheld dual-plunger spraying machine. Of course, it can also be a single-plunger spraying machine. As long as it is a handheld high-pressure spraying machine on the market, it can be adapted to the start-stop valve 30 structure designed in this patent.

[0025] Furthermore, in some embodiments, such as Figure 5As shown, in order to improve the output efficiency of the spraying machine torque, ensure stable operation, reduce noise, and facilitate maintenance, the handheld dual-plunger spraying machine includes a housing 11. The housing 11 includes a lower cover 111 and an upper cover 112 fixed on the lower cover 111. The upper cover 112 and the lower cover 111 form a component receiving cavity for installing various components of the spraying machine. A battery 12 is provided at the bottom of the rear end of the housing 11, and a liquid bottle 13 is provided at the bottom of the front end of the housing 11. A motor 15 is fixedly installed at the rear section of the component receiving cavity of the housing 11 via a bracket 14. A push-button switch 16 is provided below the motor 15. The motor 15 is electrically connected to the push-button switch 16 via a wire, and the push-button switch 16 is electrically connected to the battery 12 via a wire. A large reduction gear 17 is rotatably provided at the front end of the bracket 14, which meshes with the power gear 151 on the output shaft of the motor 15. Two eccentric shafts 17 with a front-to-back misalignment are provided on the upper and lower sides of the large reduction gear 17. 1. Two eccentric shafts 171, staggered front and rear, are both poweredly connected to plungers 19 via connecting rods 18. A double-hole pumping chamber 110 is fixedly installed at the front of the housing 11's receiving cavity. The double-hole pumping chamber 110 has an upper cavity 1101 and a lower cavity 1102. Two corresponding upper and lower plungers 19 are respectively sealed and inserted into the upper cavity 1101 and lower cavity 1102. A lower opening mechanism is located on the lower side of the lower cavity 1102. The valve 1103 is connected to the liquid bottle 13. The front end of the lower cavity 1102 is connected to the upper cavity 1101 through the connecting passage 1104. The lower end of the connecting passage 1104 located in the lower cavity 1102 is closed by the spring valve needle 1105. The front end of the upper cavity 1101 is the high pressure outlet of the sprayer body 10, and its inner side is fixedly and sealed to the outer side of the rear end of the start-stop valve cavity 312. It is also connected to the front cavity 311 through the channel 313.

[0026] This design transforms the commonly used planetary gear transmission mechanism into a large reduction gear 17. The large reduction gear 17 has high inertia and low oscillation when rotating at high speed, resulting in more efficient and stable torque output, reduced energy consumption, low noise and low failure rate, and easier maintenance, making it more conducive to widespread use.

[0027] Furthermore, in some embodiments, such as Figure 5 As shown, for convenient charging, the battery 12 is detachably mounted on the lower rear side of the housing 11. A power contact is provided on the lower rear side of the housing 11, and a battery contact is provided on the upper side of the battery 12. The battery 12 is electrically connected to the power contact through the battery contact. The push-button switch 16 is electrically connected to the power contact through a wire. In this way, the battery 12 can be removed for charging, which is convenient for use. Multiple batteries can also be set up for replacement charging, eliminating the need to wait for charging and making it more convenient to use.

[0028] Furthermore, in some embodiments, such as Figure 5As shown, for convenient pressing and use, the button switch 16 includes a button 161 that is slidably disposed on the inner side of the rear end of the housing 11, and a touch switch 162 that is fixedly disposed on the rear side of the button 161 and contacts the button 161 for pressing and control. The two ends of the touch switch 162 are electrically connected to the motor 15 and the battery 12 respectively through wires. When in use, the user holds the lower rear end of the housing 11 and presses the button 161 with their finger to control the operation of the motor 15, which is convenient to use.

[0029] The above description is merely illustrative of the embodiments of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model without creative labor should be included within the protection scope of this utility model.

Claims

1. A hand-held high-pressure sprayer comprising a sprayer body (10), a nozzle (20) arranged at the front end of the sprayer body (10), characterized in that: The nozzle (20) is connected to the high-pressure outlet of the spraying machine body (10) via a start-stop valve (30). The start-stop valve (30) includes a start-stop valve cavity (31). The inner cavity of the start-stop valve cavity (31) is divided into a front cavity (311) and a rear cavity (312) by a partition plate (32) with a central hole. A valve seat (33) is sealed and fixedly installed on the inner side of the front end of the front cavity (311). The front side of the valve seat (33) is closed and a discharge port (331) is provided at the center of the front side. The discharge port (331) contains... A valve needle (34) is movably disposed within the front cavity (311). The valve needle (34) includes a valve body (341) at the front end and a valve stem (342) disposed on the rear side of the valve body (341). A sealing seat (35) and a cylindrical seal (36) are fixedly disposed on the front side of the partition plate (32). An O-ring (361) is disposed on the outer ring of the cylindrical seal (36). The sealing seat (35) presses against the cylindrical seal (36) to seal the front side of the partition plate (32). Both the sealing seat (35) and the cylindrical seal (36) have a center. A central hole is provided, which is aligned with the central hole of the partition plate (32). The valve stem (342) on the rear side of the valve needle (34) is tightly fitted and can move through the central hole of the sealing seat (35), the cylindrical seal (36), and the partition plate (32) in sequence before extending into the rear cavity (312). The rear end is fixedly connected to the support seat (37). The support seat (37) is movably fitted and tightly fitted in the rear cavity (312), and a boss (371) is provided on the rear side of the support seat (37). A spring is sealed and fixedly installed on the inner side of the rear end of the rear cavity (312). The spring seat (38) has a second boss (381) on its front side. A spring (39) is provided between the first boss (371) and the second boss (381). The front end of the spring (39) is sleeved on the outside of the first boss (371) and abuts against the support seat (37). The rear end of the spring (39) is sleeved on the outside of the second boss (381) and abuts against the spring seat (38). At least one channel (313) is provided on the side wall of the rear cavity (312) of the start-stop valve cavity (31) and communicates with the front cavity (311). The valve stem (342) on the rear side of the valve needle (34) is pushed forward by the elastic force of spring 1 (39), and the valve body (341) at the front end of the valve needle (34) abuts against the discharge port (331) at the center of the front side of the sealing valve seat body (33). The front cavity (311) is sealed on the outside of the nozzle (20) and communicates with it. The rear cavity (312) is sealed on the outside of the rear end of the sprayer body (10) and communicates with the front cavity (311) through the channel (313).

2. The hand-held high-pressure sprayer of claim 1, wherein: The inner outer ring of the discharge port (331) is fixedly provided with a sealing gasket (3311) and a valve seat (3312) in sequence. The valve body (341) at the front end of the valve needle (34) abuts against the valve seat (3312) to seal the discharge port (331).

3. The hand-held high-pressure sprayer of claim 1, wherein: The sealing seat (35) is provided with a boss three (351) on the front side. A spring two (310) is also provided between the boss three (351) and the valve body (341). The spring two (310) is sleeved on the outside of the valve stem (342) and its front end abuts against the valve body (341). The rear end of the spring two (310) is sleeved on the outside of the boss three (351) and abuts against the sealing seat (35).

4. The hand-held high-pressure sprayer of claim 1, wherein: The sealing seat (35) is recessed inward on the rear end face and a bowl-shaped seal (352) is provided. The bowl-shaped seal (352) has a hole in the center that fits tightly through the valve stem (342).

5. The hand-held high-pressure sprayer of claim 1, wherein: The spraying machine body (10) is a handheld double plunger spraying machine.

6. The hand-held high-pressure sprayer of claim 5, wherein: The handheld dual-plunger sprayer includes a housing (11), which includes a lower cover (111) and an upper cover (112) fixed to the lower cover (111). A component receiving cavity is formed between the upper cover (112) and the lower cover (111) for installing various components of the sprayer. A battery (12) is located at the bottom rear end of the housing (11), and a liquid bottle (13) is located at the bottom front end of the housing (11). A motor is fixedly mounted on the rear section of the component receiving cavity of the housing (11) via a bracket (14). 15), a push-button switch (16) is provided on the lower side of the motor (15), the motor (15) is electrically connected to the push-button switch (16) through a wire, the push-button switch (16) is electrically connected to the battery (12) through a wire, the front end of the bracket (14) is rotatably provided with a large reduction gear (17) that meshes with the power gear (151) on the output shaft of the motor (15), the large reduction gear (17) is provided with two eccentric shafts (171) that are staggered front and back on the upper and lower sides, the two eccentric shafts (171) that are staggered front and back are provided with two eccentric shafts (171) that are staggered front and back. 71) All are powered by connecting rod (18) and equipped with plungers (19). The front section of the housing (11) component is fixedly provided with a double-hole pumping chamber (110). The double-hole pumping chamber (110) is provided with an upper chamber hole (1101) and a lower chamber hole (1102) at the top and bottom. The upper chamber hole (1101) and the lower chamber hole (1102) are respectively sealed and inserted with corresponding upper and lower plungers (19). The lower side of the lower chamber hole (1102) is connected by a lower one-way valve (1103) that opens into the lower chamber hole (1102). The lower cavity (1102) is connected to the liquid bottle (13). The front end of the lower cavity (1102) is connected to the upper cavity (1101) through the connecting passage (1104). The lower end of the connecting passage (1104) located in the lower cavity (1102) is closed by the spring valve needle (1105). The front end of the upper cavity (1101) is the high pressure outlet of the sprayer body (10) and its inner side is fixedly and sealed to the outer side of the rear cavity (312) of the start-stop valve cavity (31). It is also connected to the front cavity (311) through the channel (313).

7. The hand-held high-pressure sprayer of claim 6, wherein: The battery (12) is detachably disposed at the lower rear end of the housing (11). A power contact is provided at the lower rear end of the housing (11). A battery contact is provided on the upper side of the battery (12). The battery (12) is electrically connected to the power contact through the battery contact. The push button switch (16) is electrically connected to the power contact through a wire.

8. The handheld high-pressure sprayer according to claim 6, characterized in that: The push button switch (16) includes a button (161) that can be slidably disposed on the inner side of the rear end of the housing (11), and a touch switch (162) that is fixedly disposed on the rear side of the button (161) and is in contact with the button (161) for press control. The two ends of the touch switch (162) are electrically connected to the motor (15) and the battery (12) respectively through wires.

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