A handheld electrostatic sprayer

Abstract

The invention relates to an electrostatic spray device and discloses a handheld electrostatic sprayer, comprising a handheld shell, a liquid storage unit, a micro-diaphragm pump, a spray module, a high-voltage module and a power module. The liquid storage unit is connected to the handheld shell, the micro-diaphragm pump, the spray module, the high-voltage module and the power module are arranged in the handheld shell, the water inlet interface of the micro-diaphragm pump is connected to the liquid storage unit, and the water outlet interface is connected to the spray module. A charged electrode is arranged in the spray module, the charged electrode is connected to the high-voltage module, the micro-diaphragm pump and the high-voltage module are both connected to the power module, and the high-voltage module can control the output of the high-voltage module according to the position state of the micro-diaphragm pump, so as to output a high-voltage electric field when the water inlet interface and the water outlet interface are in a disconnected state, and prevent the high voltage from being transmitted to the liquid storage unit and the handheld part to cause electric shock risk while charging the spray droplets.

Description

Technical Field

[0001] The invention relates to electrostatic spray equipment, in particular to a handheld electrostatic sprayer. Background Art

[0002] Electrostatic spray is a method of charging the sprayed droplets through a high-voltage electrostatic generator. Since the sprayed droplets carry a high-voltage charge, a strong electrostatic field is formed between the droplets and the spray target. When the droplets approach the spray target under the action of the spray force, the droplets are more attracted to the spray target under the action of the electrostatic force, and can wrap around and attach to the side and back of the spray target, reaching the entire surface of the spray target in different directions, increasing the deposition of the droplets on the target object and reducing the deposition in non-target areas, effectively improving the utilization rate of the droplets and the uniformity of the distribution of the droplets on the entire surface of the spray target.

[0003] Electrostatic spray equipment is a device that can form droplets of liquid raw materials and spray them out, and make the droplets carry high-voltage static electricity. Electrostatic spray equipment usually drives liquid raw materials to form droplets through high-pressure air, or drives liquid raw materials through spray nozzles at high speed to form droplets; by placing the high-voltage electrode of the high-voltage electrostatic generator in the liquid raw material, or making the liquid raw material or droplets pass through the metal guide tube connected to the high-voltage electrode of the high-voltage electrostatic generator, the droplets carry high voltage electricity, so that the electrostatic spray of liquid raw materials can be conveniently carried out. It has the advantages of easy use, good spray effect, and high work efficiency. It has been widely used in the fields of material spraying, pesticide spraying, and medical disinfection. Especially in the field of medical disinfection, since the sprayed charged droplets can be attached to the surface of the target object in all directions and without dead angles under the action of electrostatic adsorption, the disinfection effect is greatly improved. Electrostatic spray equipment, especially handheld electrostatic sprayers, has been widely used in recent years, which has brought great convenience to medical disinfection work.

[0004] There are two main modes of handheld electrostatic sprayers commonly used for disinfection: one is to connect the high-voltage electrode of the high-voltage electrostatic generator to the water tank to charge the disinfection liquid in the water tank, so that the sprayed liquid droplets carry high-voltage static electricity; the other is to connect the high-voltage electrode of the high-voltage electrostatic generator to the water outlet of the spray nozzle, and discharge the electricity to the droplets at the water outlet through the high-voltage electrode, so that the sprayed liquid droplets carry high-voltage static electricity. Both methods will cause the disinfection liquid to carry high-voltage static electricity, and disinfection work is usually carried out in a very humid environment. High-voltage static electricity can easily be transmitted to the hands of disinfection personnel through the wet handheld electrostatic sprayer, causing electrical stimulation to the disinfection personnel and even causing safety risks. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a handheld electrostatic sprayer which can reduce the risk of leakage of high-voltage static electricity while performing electrostatic spraying.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a handheld electrostatic sprayer, including a handheld shell, a liquid storage unit, a micro diaphragm pump, a spray module, a high-voltage module and a power module, wherein the liquid storage unit is connected to the handheld shell, and the micro diaphragm pump, the spray module, the high-voltage module and the power module are arranged in the shell, the water inlet interface of the micro diaphragm pump is connected to the liquid storage unit, and the water outlet interface is connected to the spray module, a charged electrode is arranged in the spray module, and the charged electrode is connected to the high-voltage module, the micro diaphragm pump and the high-voltage module are both connected to the power module, and the high-voltage module can control the output of the high-voltage module according to the position state of the micro diaphragm pump, so as to output a high-voltage electric field when the water inlet interface and the water outlet interface are in a disconnected state.

[0007] Preferably, the micro diaphragm pump includes a pump motor, a diaphragm module, a one-way valve module and a water pipe interface module, a deflection rod is arranged on the output shaft of the pump motor, the diaphragm module includes a suction cup bracket and a plurality of diaphragm suction cups, a deflection rod interface is arranged in the middle of the suction cup bracket, and is connected to the deflection rod through the deflection rod interface, and a plurality of diaphragm suction cups are arranged around the suction cup bracket. The one-way valve module includes an inlet cavity, an outlet cavity, an inlet one-way valve and an outlet one-way valve, the inlet one-way valve includes an inlet valve port and an inlet valve plate, and the outlet one-way valve includes a The water inlet valve port and the water outlet valve plate are included, the water inlet valve port is connected with the inlet cavity, the water inlet valve plate is arranged on the outlet side of the water inlet valve port, the water outlet valve port is connected with the outlet cavity, the water outlet valve plate is arranged on the outlet side of the water outlet valve port, the water inlet interface and the water outlet interface are arranged on the water pipe interface module, and the water inlet interface is connected with the inlet cavity, the water outlet interface is connected with the outlet cavity, the diaphragm suction cup is arranged relative to the one-way valve module, so that the water inlet valve port and the water outlet valve port are located within the coverage range of the diaphragm suction cup.

[0008] Preferably, a magnetic element is provided on the output shaft of the pump motor, and a magnetic induction element is provided on the periphery of the magnetic element so that the position state of the pump motor can be detected by the magnetic induction element, and the magnetic induction element is electrically connected to the high-voltage module.

[0009] Further preferably, the magnetic element is a magnetic ring with an eccentric magnetic field, and the magnetic sensing element is a Hall sensor arranged at different positions on the periphery of the magnetic ring.

[0010] Preferably, the diaphragm suction cup, the water inlet one-way valve and the water outlet one-way valve are all provided with a high-resistance insulating film.

[0011] Preferably, the spray module includes a liquid flow channel and a spray unit, the charged electrode is arranged in the liquid flow channel, the spray unit includes at least one spray nozzle, one end of the liquid flow channel is connected to the water outlet interface, and the other end is connected to the spray nozzle, and the charged electrode is electrically connected to the high-voltage module.

[0012] Further preferably, the charged electrodes are a plurality of electrode strips arranged on the side walls of the liquid flow channel and extending axially along the liquid flow channel, and the plurality of electrode strips are evenly distributed in the radial direction of the side walls of the liquid flow channel.

[0013] Preferably, the charged electrode is a conductive electrode tube disposed in the liquid flow channel, and the tube wall of the conductive electrode tube is closely attached to the side wall of the liquid flow channel.

[0014] Preferably, the handheld housing comprises a gripping portion and a nozzle mounting opening, the gripping portion is provided with a grounding electrode, and the spray unit is detachably connected to the nozzle mounting opening and the liquid flow channel.

[0015] Further preferably, a liquid storage unit mounting interface is provided on the handheld housing, and the liquid storage unit is detachably mounted on the handheld housing through the liquid storage unit mounting interface.

[0016] Through the above technical scheme, the handheld electrostatic sprayer of the present invention arranges the charged electrode in the spray module, so that the high-voltage electric field generated by the high-voltage module is applied to the droplet area, and while charging the disinfectant solution, the charged electrode is located away from the liquid storage unit, which is conducive to the electrical isolation of the liquid storage unit; the use of the micro-diaphragm pump can form a periodic partition between the water inlet interface and the water outlet interface, thereby forming a periodic partition between the water path of the spray module and the liquid storage unit, which is conducive to the electrical isolation between the spray module and the liquid storage unit; the high-voltage module outputs the high-voltage electric field according to the position state of the micro-diaphragm pump, which can generate a high-voltage electric field when the water path between the spray module and the liquid storage unit is in a reliable isolation state, and stop the high-voltage electric field output when the water path between the spray module and the liquid storage unit is in a conversion state between connection and isolation, thereby forming electrical isolation between the spray module and the liquid storage module. On the one hand, the high-voltage electric pulses generated by the high-voltage module can be released in a concentrated manner, effectively increasing the strength of the electrostatic field and the amount of charge carried by the droplets, making the distribution of the droplets more uniform; on the one hand, it can prevent the risk of high-voltage electricity being transmitted to the liquid storage unit and causing the handheld shell to be charged; on the other hand, it can release the high-voltage electric pulses generated by the high-voltage module in a concentrated manner, effectively increasing the strength of the high-voltage electric field and the amount of charge carried by the droplets, making the distribution of the droplets and their attachment to the spray target more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is a schematic diagram of the external structure of an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the internal structure of a handheld housing according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of a micro diaphragm pump according to an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of the pump motor structure of an embodiment of the present invention;

[0021] Figure 5 Schematic diagram of the forward (a) and rearward (b) structures of a diaphragm module according to an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the forward (a) and backward (b) structures of a one-way valve module according to an embodiment of the present invention;

[0023] Figure 7 1 is a schematic diagram of the forward (a) and rearward (b) structures of a water pipe interface module according to an embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of the structure of a spray module according to an embodiment of the present invention;

[0025] Fig. 9 It is a schematic diagram of the corresponding relationship between the diaphragm suction cup pressure and the pulsed electrostatic field according to an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1 Handheld housing 11 Grip

[0028] 111 Ground electrode 12 Nozzle installation port

[0029] 2 Liquid storage unit 21 Liquid storage unit bracket

[0030] 3 Micro diaphragm pump 301 water inlet interface

[0031] 302 Water outlet interface 31 Pump motor

[0032] 311 deflection rod 312 magnetic induction element

[0033] 32 Diaphragm module 321 Suction cup bracket

[0034] 3211 Deflection rod interface 322 Diaphragm suction cup

[0035] 33 Check valve module 331 Inlet cavity

[0036] 332 Outlet cavity 333 Inlet check valve

[0037] 3331 Water inlet valve port 3332 Water inlet valve plate

[0038] 334 Water outlet check valve 3341 Water outlet valve port

[0039] 3342 Water outlet valve 34 Water pipe interface module

[0040] 4 Spray module 41 Charged electrode

[0041] 42 Liquid flow channel 43 Spray unit

[0042] 431 Spray Nozzle 5 High Pressure Module

[0043] 6 Power Module DETAILED DESCRIPTION

[0044] In the present invention, unless otherwise stated, the directions or positional relationships indicated by the directional words such as "front" and "rear" are based on the directions or positional relationships of the handheld electrostatic sprayer of the present invention when it is actually used. Among them, the direction indicated by the directional word "front" is the direction away from the user. The description of the directions or positional relationships of the components in the present invention is consistent with the installation directions in actual use.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0047] An embodiment of the handheld electrostatic sprayer of the present invention is as follows Figure 1 and Figure 2As shown, it includes a handheld housing 1, a liquid storage unit 2, a micro diaphragm pump 3, a spray module 4, a high-voltage module 5 and a power module 6. The handheld housing 1 can be made of a polymer material such as plastic, and can be set to various shapes that are convenient for the operator to hold, such as a pistol shape, so that the user can conveniently hold the handheld housing 1 by hand to perform electrostatic spray disinfection operations. The liquid storage unit 2 can be various containers that can store water containing a certain concentration of disinfectant. The liquid storage unit 2 is connected to the handheld housing 1. Specifically, the liquid storage unit 2 can be installed on the handheld housing 1, and can also be connected to the handheld housing 1 through a water pipe. When using a liquid storage unit installed on the handheld housing 1, the liquid storage unit 2 can use various suitable shapes installed on the handheld housing 1, such as round, square, clip-shaped, etc.

[0048] The micro-diaphragm pump 3, the spray module 4, the high-voltage module 5 and the power module 6 are all installed in the handheld housing 1, wherein the micro-diaphragm pump 3 is an embolic pump that isolates the pumped liquid from the driving embolism through a diaphragm, and is provided with a water inlet interface 301 and a water outlet interface 302. When the micro-diaphragm pump 3 is working, the disinfectant is sucked from the water inlet interface 301 through the periodic reciprocating motion of the diaphragm and the cooperation of the one-way valve, and is transported out through the water outlet interface 302. During the operation of the micro-diaphragm pump 3, the one-way valve is continuously opened and closed with the movement of the diaphragm, ensuring the one-way flow of the disinfectant from the water inlet interface 301 to the water outlet interface 302, and also making the liquid path between the water inlet interface 301 and the water outlet interface 302 in an alternately isolated state.

[0049] The water inlet interface 301 is connected to the liquid storage unit 2 so that the configured disinfectant can be sucked from the liquid storage unit 2 for spray disinfection. The water outlet interface 302 is connected to the spray module 4 so that the disinfectant can be transported to the spray module 4 to form disinfectant droplets, thereby improving the spraying range and uniformity of the disinfectant. The spray module 4 can be any device that can form a liquid into tiny liquid droplets and spray them over a large range. A charged electrode 41 is provided in the spray module 4. When the disinfectant enters the spray module 4, it can contact the charged electrode 41. The charged electrode 41 can charge the disinfectant under the action of a high-voltage electric field, so that the disinfectant droplets sprayed by the spray module 4 carry an electrostatic charge. Disinfectant droplets with static charge can form repulsive force with each other, making the spraying range of disinfectant droplets wider. When disinfectant droplets with static charge approach the disinfection target, electrostatic attraction can be generated between the disinfectant droplets and the target, so that the disinfectant droplets can be more adsorbed on the spray target. Some droplets can also surround and attach to the sides and back of the spray target, thereby improving the utilization rate of the disinfectant and the disinfection effect of the target.

[0050] The high-voltage module 5 can use various existing electronic devices that can generate a high-voltage electric field. The high voltage mentioned in this application refers to a voltage with a voltage value greater than 1KV. The electrostatic output end of the high-voltage module 5 usually has two electrodes, one of which is grounded to form a zero potential, and the other electrode is connected to the charged electrode 41. The high-voltage potential generated by the high-voltage module 5 is transferred to the spray module 4, and a high-voltage electric field is generated around the charged electrode 41 to charge the disinfectant, so that the disinfectant droplets sprayed from the spray module 4 have an electrostatic charge.

[0051] The micro diaphragm pump 3 and the high-voltage module 5 are both connected to the power module 6. The micro diaphragm pump 3 works under the power of the power module 6, continuously extracts the disinfectant in the liquid storage unit 2, forms a certain pressure and transmits it to the spray module 4 to form uniform disinfectant droplets; the high-voltage module 5 converts the electric energy provided by the power module 6 into a high-voltage electric field, and transmits it to the spray module 4 so that the disinfectant droplets carry more static charge. The micro-diaphragm pump 3 is provided with a state sensing device capable of sensing the rotational position state of the micro-diaphragm pump 3. The state sensing device can be a position marking member such as a metal sheet, a magnetic sheet, etc. arranged on the diaphragm and its corresponding detection member, or it can be an encoder or a position marking disk and its marking detection member arranged on the pump motor that drives the movement of the diaphragm. The state sensing device is electrically connected to the high-voltage module 5, and can transmit the rotational position information of the micro-diaphragm pump 3 to the high-voltage module 5, and thereby control the high-voltage module 5 to work periodically according to the rotational state of the micro-diaphragm pump 3, and generate a pulsed high-voltage electric field when the liquid path between the water inlet interface 301 and the water outlet interface 302 is usually reliably isolated, and stop outputting the electrostatic field when the liquid path between the water inlet interface 301 and the water outlet interface 302 is switched between connection and isolation. In this way, the electrostatic field generated by the high-voltage module 5 can be concentrated between the micro-diaphragm pump 3 and the spray module 4, thereby improving the charge-to-mass ratio of the disinfectant droplets output by the spray module 4, improving the charging efficiency generated by the high-voltage module 5, and at the same time making the other parts of the electrostatic sprayer, especially the disinfectant in the liquid storage unit 2, uncharged, reducing the risk of electric shock to the user. The structure of the high-voltage module 5 and its control structure for generating pulsed static electricity are both conventional technologies in the relevant field and will not be described in detail in this specification.

[0052] In some embodiments of the handheld electrostatic sprayer of the present application, Figures 3 to 7 As shown, the micro diaphragm pump 3 includes a pump motor 31, a diaphragm module 32, a one-way valve module 33 and a water pipe interface module 34, and the pump motor 31, the diaphragm module 32, the one-way valve module 33 and the water pipe interface module 34 are connected in sequence.

[0053] A deflection rod 311 is provided on the output shaft of the pump motor 31 . When the pump motor 31 rotates, the end of the deflection rod 311 can be driven to perform a circular motion with the rotating shaft of the pump motor 31 as the center.

[0054] The diaphragm module 32 includes a suction cup bracket 321 and a diaphragm suction cup 322. The suction cup bracket 321 is a cross-shaped hard bracket. A deflection rod interface 3211 is provided at the center of the cross-shaped suction cup bracket 321. The end of the deflection rod 311 is installed in the deflection rod interface 3211. When the pump motor 31 rotates, the suction cup bracket 321 can be driven to swing around through the deflection rod 311. A diaphragm suction cup 322 is connected to each of the four ends of the cross-shaped suction cup bracket 321, so that the diaphragm suction cups 322 are evenly arranged around the suction cup bracket 321. When the suction cup bracket 321 swings around driven by the deflection rod 311, the diaphragm suction cups 322 around the suction cup bracket 321 can be driven to perform compression and stretching movements in sequence.

[0055] The one-way valve module 33 includes an inlet chamber 331, an outlet chamber 332, a water inlet one-way valve 333 and a water outlet one-way valve 334. The inlet chamber 331 is arranged in the peripheral area of ​​the outlet chamber 332, and the two are arranged coaxially. A diaphragm partition is arranged at one end of the inlet chamber 331 and the outlet chamber 332. The inlet chamber 331 is connected to the water inlet interface 301, and the outlet chamber 332 is connected to the water outlet interface 302. The water inlet one-way valve 333 is arranged on the liquid path between the inlet chamber 331 and the diaphragm suction cup 322, and the water outlet one-way valve 334 is arranged on the liquid path between the diaphragm suction cup 322 and the outlet chamber 332.

[0056] There are four water inlet check valves 333 and four water outlet check valves 334, the water inlet check valve 333 includes a water inlet valve port 3331 and a water inlet valve plate 3332, and the water outlet check valve 334 includes a water outlet valve port 3341 and a water outlet valve plate 3342. The water inlet valve port 3331 is arranged at a position on the diaphragm partition corresponding to the inlet cavity 331, and the four water inlet valve ports 3331 are evenly distributed on the diaphragm partition and are all connected to the inlet cavity 331. The water inlet valve plate 3332 is arranged at the outlet side of the water inlet valve port 3331, that is, at the side close to the diaphragm suction cup 322. The water inlet valve plate 3332 is arranged close to the water inlet valve port 3331. When the diaphragm suction cup 322 is stretched, the disinfectant entering from the water inlet valve port 3331 can push open the water inlet valve plate 3332, so that the water inlet check valve 333 is opened, and the disinfectant enters the diaphragm suction cup 322. When the diaphragm suction cup 322 is compressed, the disinfectant pushes the water inlet valve plate 3332 to close the water inlet valve port 3331, so that the water inlet check valve 333 is closed to prevent the disinfectant from flowing back into the inlet cavity 331. The water outlet valve port 3341 is arranged at a position on the diaphragm partition corresponding to the outlet cavity 332. Four water outlet valve ports 3341 are evenly distributed on the diaphragm partition and are all connected to the outlet cavity 332. The water outlet valve plate 3342 is arranged on the outlet side of the water outlet valve port 3341, that is, on one side inside the outlet chamber 332. The water outlet valve plate 3342 is arranged close to the water outlet valve port 3341. When the diaphragm suction cup 322 is stretched, the disinfectant in the outlet chamber 332 pushes the water outlet valve plate 3342 to close the water outlet valve port 3341, so that the water outlet one-way valve 334 is closed to prevent the disinfectant in the outlet chamber 332 from flowing back. When the diaphragm suction cup 322 is compressed, the disinfectant pushes the water valve plate 3342 to open the water outlet one-way valve 334, so that the disinfectant enters the outlet chamber 332 through the water outlet valve port 3341, and the disinfectant is output from the outlet chamber 332.

[0057] When the one-way valve module 33 is installed on the diaphragm module 32, the four diaphragm suction cups 322 are respectively located at positions corresponding to an inlet one-way valve 333 and an outlet one-way valve 334, and each diaphragm suction cup 322 covers the corresponding inlet valve port 3331 and outlet valve port 3341, so that the expansion and contraction of the diaphragm suction cup 322 can push the inlet valve port 3331 and the outlet valve port 3341 to open and close, and continuously transport the disinfectant in the inlet chamber 331 to the outlet chamber 332, thereby pumping out the disinfectant. The diaphragm partition, the water inlet valve plate 3332 and the water outlet valve plate 3342 are all made of insulating materials, such as silicone, insulating rubber, etc. When the water inlet valve plate 3332 closes the water inlet valve port 3331, it can achieve electrical insulation between the inlet cavity 331 and the diaphragm suction cup 322. Similarly, when the water outlet valve plate 3342 closes the water outlet valve port 3341, it can achieve electrical insulation between the outlet cavity 332 and the diaphragm suction cup 322, thereby achieving electrical insulation between the water inlet interface 301 and the water outlet interface 302 of the disinfectant, reliably achieving electrical isolation of the spray module 4, and preventing the high-voltage electrostatic field at the spray module 4 from being transmitted to other parts such as the water storage module 2.

[0058] The water inlet interface 301 and the water outlet interface 302 are arranged on the water pipe interface module 34. When the water pipe interface module 34 is installed on the one-way valve module 33, the water inlet interface 301 is connected with the inlet chamber 331 so that the disinfectant in the liquid storage unit 2 can be sucked into the inlet chamber 331; the water outlet interface 302 is connected with the outlet chamber 332 so that the disinfectant in the outlet chamber 332 can be transported to the spray module 4.

[0059] When the pump motor 31 rotates, the pressure changes of the disinfectant in the four diaphragm suction cups 322 are as follows: Fig. 9 As shown in parts A, B, C, and D in the figure, when the pressure of the disinfectant in the diaphragm suction cup 322 is greater than zero, the water inlet check valve 333 is closed, the water outlet check valve 334 is opened, and the liquid path between the water inlet interface 301 and the water outlet interface 302 is in an insulating state; when the pressure of the disinfectant in the diaphragm suction cup 322 is less than zero, the water inlet check valve 333 is opened, the water outlet check valve 334 is closed, and the liquid path between the water inlet interface 301 and the water outlet interface 302 is also in an insulating state; and when the pressure of the disinfectant in the diaphragm suction cup 322 is converted between greater than zero and less than zero, the water inlet check valve 333 and the water outlet check valve 334 are both between the open state and the closed state. At this time, the water inlet check valve 333 and the water outlet check valve 334 are not completely closed, and the liquid path between the water inlet interface 301 and the water outlet interface 302 is also unable to form an insulating state, which easily leads to the conduction of high-voltage static electricity from the spray module 4 to the liquid storage unit 2, causing the risk of electric shock.

[0060] The high pressure module 5 generates the following according to the rotation state of the micro diaphragm pump 3: Fig. 9The pulsed electrostatic field shown in part E generates a high-voltage electrostatic field when the four water inlet one-way valves 333 and the four water outlet one-way valves 334 are in a reliably open state or a reliably closed state, and stops generating the high-voltage electrostatic field when the water inlet one-way valve 333 and the water outlet one-way valve 334 are not completely closed, thereby ensuring reliable electrical isolation between the spray module 4 and the liquid storage unit 2.

[0061] In a preferred embodiment of the handheld electrostatic sprayer of the present application, Figure 2 and Figure 3 As shown, a magnetic element is arranged on the output shaft of the pump motor 31, and the magnetic element is usually arranged at the tail end of the output shaft of the pump motor 31, that is, the end opposite to the deflection rod 311. A plurality of magnetic sensing elements 312 are arranged at the position corresponding to the magnetic element on the periphery of the pump motor 31. When the pump motor 31 rotates, it can drive the magnetic element to rotate synchronously. The magnetic sensing element 312 can detect the change of magnetic flux caused by the rotation of the magnetic element, so as to detect the rotation position state information of the pump motor 31, and thus know the deflection position of the deflection rod 311. The magnetic sensing element 312 is electrically connected to the high-voltage module 5, and can transmit the deflection position information of the deflection rod 311 detected to the high-voltage module 5, so that the high-voltage module 5 can generate a pulsed high-voltage electrostatic field according to the deflection position information of the deflection rod 311, and generate a high-voltage electrostatic field when the water inlet interface 301 and the water outlet interface 302 are reliably insulated.

[0062] As a specific embodiment of the handheld electrostatic sprayer of the present application, the magnetic element adopts a magnetic ring with an eccentric magnetic field. When the magnetic ring rotates, the magnetic field around the magnetic ring will change in strength. The magnetic sensing element 312 adopts two Hall sensors orthogonally distributed on the periphery of the magnetic ring. Through the two orthogonally distributed Hall sensors, the magnetic field changes around the magnetic ring can be better sensed, thereby accurately detecting the rotation position state of the pump motor 31.

[0063] In some embodiments of the handheld electrostatic sprayer of the present application, a high-resistance insulating film is provided on the surface of the diaphragm sucker 322, the water inlet check valve 333 and the water outlet check valve 334. The high-resistance insulating film can be formed by coating the surface of the diaphragm sucker 322, the water inlet check valve 333 and the water outlet check valve 334 with a high-resistance insulating coating DH351 with a withstand voltage and a high resistivity, or a TPV coating IMV-1040A. The high-resistance insulating film can increase the insulation between the inlet cavity 331 and the diaphragm sucker 322 when the inlet valve plate 3332 closes the inlet valve port 3331, and increase the insulation between the diaphragm sucker 322 and the outlet cavity 332 when the outlet valve plate 3342 closes the outlet valve port 3341, thereby ensuring the electrical isolation between the spray module 4 and the liquid storage unit 2, and preventing the high voltage generated by the high-voltage module 5 from being transmitted to the liquid storage unit 2 and the handheld part of the sprayer, causing electrical stimulation to the operator.

[0064] In some embodiments of the handheld electrostatic sprayer of the present application, Figure 8 As shown, the spray module 4 includes a liquid flow channel 42 and a spray unit 43. One end of the liquid flow channel 42 is connected to the water outlet interface 302, and the other end is connected to the spray unit 43. The disinfectant enters the spray unit 43 through the liquid flow channel 42. The charged electrode 41 is arranged in the liquid flow channel 42 and is electrically connected to the high-voltage module 5. When the disinfectant flows through the location of the charged electrode 41, the high-voltage electric field on the charged electrode 41 can charge the disinfectant, so that the disinfectant carries a large amount of static charge. According to the different polarities of the charged electrode 41, the disinfectant can carry a positive charge or a negative charge. The disinfectant with static charge is sprayed out through the spray unit 43 to form disinfectant droplets with static charge.

[0065] The spray nozzle 431 can be selected from various existing nozzles as needed. The liquid flow channel 42 is connected to the inlet of the spray nozzle 431 to transport the disinfectant to the spray nozzle 431, and the spray nozzle 431 sprays a wide range of disinfectant droplets.

[0066] In a preferred embodiment of the handheld electrostatic sprayer of the present application, a plurality of electrode strips extending axially along the liquid flow channel 42 are provided on the side wall of the liquid flow channel 42, and the plurality of electrode strips are fixed on the side wall of the liquid flow channel 42 and evenly distributed in the radial direction of the liquid flow channel 42 to form a charged electrode 41. The charged electrode 41 formed by the plurality of electrode strips can charge the disinfectant in a larger range, thereby increasing the amount of electrostatic charge carried in the disinfectant.

[0067] In another preferred embodiment of the handheld electrostatic sprayer of the present application, the charged electrode 41 is a conductive electrode tube arranged in the liquid flow channel 42. The diameter of the conductive electrode tube is equivalent to the diameter of the liquid flow channel 42. The conductive electrode tube is fixed in the liquid flow channel 42. The tube wall of the conductive electrode tube is tightly attached to the side wall of the liquid flow channel 411 on all sides, so that the disinfectant passing through the liquid flow channel 42 flows through the conductive electrode tube. The high-intensity uniform magnetic field in the conductive electrode tube increases the amount and uniformity of static charge carried in the disinfectant.

[0068] In some embodiments of the handheld electrostatic sprayer of the present application, Figure 1 and Figure 2 As shown, the handheld housing 1 includes a grip portion 11 and a nozzle mounting opening 12. The grip portion 11 is configured to be convenient for the user to hold with one hand, and the nozzle mounting opening 12 is disposed at the front end of the sprayer, so that the spray unit 43 installed in the nozzle mounting opening 12 can spray disinfectant droplets in a direction away from the user, thereby reducing the impact of the disinfectant droplets on the user.

[0069] A grounding electrode 111 is provided on the outer wall of the holding portion 11. The grounding electrode 111 usually has a large surface area. The grounding electrode 111 is provided at the junction of the rear end face and the side face of the holding portion 11, so that the user's hand can more easily form a close contact with the grounding electrode 111, thereby utilizing the human body to form a grounding electrode for the high-voltage module 5.

[0070] The spray unit 43 is installed in the nozzle mounting opening 12 and is detachably connected to the nozzle mounting opening 12. When the spray unit 43 is installed at the nozzle mounting opening 12, the spray unit 43 is simultaneously connected to the liquid flow channel 42. When the spray unit 43 is removed from the nozzle mounting opening 12, the spray unit 43 is simultaneously separated from the liquid flow channel 42. The detachable structure of the spray unit 43 facilitates the cleaning and replacement of the spray unit 43, which is conducive to improving the service life of the handheld electrostatic sprayer of the present application.

[0071] In a preferred embodiment of the handheld electrostatic sprayer of the present application, Figure 1 and Figure 2 As shown, a liquid storage unit mounting interface is provided on the handheld housing 1, and the liquid storage unit 2 can be installed on the handheld housing 1 through the liquid storage unit mounting interface, and spray disinfection is performed using the disinfectant contained in the liquid storage unit 2; the liquid storage unit 2 can be removed from the liquid storage unit mounting interface to facilitate adding disinfectant to the liquid storage unit 2.

[0072] A liquid storage unit bracket 21 extending downward from the liquid storage unit 2 may also be provided on the handheld housing 1 . The liquid storage unit bracket 21 can support the liquid storage unit 2 from below the liquid storage unit 2 , thereby improving the position stability of the liquid storage unit 2 .

[0073] In the description of this specification, the reference terms "one embodiment", "some embodiments", "a specific implementation" mean that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. In this specification, the schematic representations do not necessarily refer to the same embodiment.

[0074] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any appropriate manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A handheld electrostatic sprayer, characterized in that: The invention comprises a handheld housing (1), a liquid storage unit (2), a micro-diaphragm pump (3), a spray module (4), a high-voltage module (5) and a power module (6), wherein the liquid storage unit (2) is connected to the handheld housing (1), the micro-diaphragm pump (3), the spray module (4), the high-voltage module (5) and the power module (6) are arranged in the housing (1), the water inlet interface (301) of the micro-diaphragm pump (3) is connected to the liquid storage unit (2), and the water outlet interface (302) is connected to the spray module (4), a charged electrode (41) is arranged in the spray module (4), the charged electrode (41) is connected to the high-voltage module (5), the micro-diaphragm pump (3) and the high-voltage module (5) are both connected to the power module (6), and the high-voltage module (5) can control the output of the high-voltage module (5) according to the position state of the micro-diaphragm pump (3), so as to output a high-voltage electric field when the water inlet interface (301) and the water outlet interface (302) are in a disconnected state; The micro diaphragm pump (3) comprises a pump motor (31), a diaphragm module (32), a one-way valve module (33) and a water pipe interface module (34); a deflection rod (311) is arranged on the output shaft of the pump motor (31); the diaphragm module (32) comprises a suction cup bracket (321) and a plurality of diaphragm suction cups (322); a deflection rod interface (3211) is arranged in the middle of the suction cup bracket (321); and a deflection rod interface (3211) is arranged in the middle of the suction cup bracket (321). 11) is connected to the deflection rod (311), a plurality of the diaphragm suction cups (322) are arranged around the suction cup bracket (321), the one-way valve module (33) includes an inlet cavity (331), an outlet cavity (332), an inlet one-way valve (333) and an outlet one-way valve (334), the inlet one-way valve (333) includes an inlet valve port (3331) and an inlet valve plate (3332), and the outlet one-way valve (334) includes The water outlet valve port (3341) and the water outlet valve plate (3342), the water inlet valve port (3331) is connected to the inlet cavity (331), the water inlet valve plate (3332) is arranged on the outlet side of the water inlet valve port (3331), the water outlet valve port (3341) is connected to the outlet cavity (332), the water outlet valve plate (3342) is arranged on the outlet side of the water outlet valve port (3341), the water inlet interface (301) and The water outlet interface (302) is arranged on the water pipe interface module (34), and the water inlet interface (301) is connected to the inlet cavity (331), and the water outlet interface (302) is connected to the outlet cavity (332), and the diaphragm suction cup (322) and the one-way valve module (33) are arranged relative to each other, so that the water inlet valve port (3331) and the water outlet valve port (3341) are located within the coverage range of the diaphragm suction cup (322).

2. The handheld electrostatic sprayer according to claim 1, characterized in that: A magnetic element is arranged on the output shaft of the pump motor (31), and a magnetic sensing element (312) is arranged on the periphery of the magnetic element so that the position state of the pump motor (31) can be detected by the magnetic sensing element (312), and the magnetic sensing element (312) is connected to the high-voltage module (5).

3. The handheld electrostatic sprayer according to claim 2, characterized in that: The magnetic element is a magnetic ring with an eccentric magnetic field, and the magnetic induction element (312) is a Hall sensor arranged at different positions on the periphery of the magnetic ring.

4. The handheld electrostatic sprayer according to claim 1, characterized in that: The diaphragm suction cup (322), the water inlet check valve (333) and the water outlet check valve (334) are all provided with a high-resistance insulating film.

5. The handheld electrostatic sprayer according to any one of claims 1 to 4, characterized in that: The spray module (4) comprises a liquid flow channel (42) and a spray unit (43), the charged electrode (41) is arranged in the liquid flow channel (42), the spray unit (43) comprises at least one spray nozzle (431), one end of the liquid flow channel (42) is connected to the water outlet interface (302), and the other end is connected to the spray nozzle (431), and the charged electrode (41) is electrically connected to the high-voltage module (5).

6. The handheld electrostatic sprayer according to claim 5, characterized in that: The charged electrodes (41) are a plurality of electrode strips arranged on the side wall of the liquid flow channel (42) and extending axially along the liquid flow channel (42); the plurality of electrode strips are evenly distributed in the radial direction of the side wall of the liquid flow channel (42).

7. The handheld electrostatic sprayer according to claim 5, characterized in that: The charged electrode (41) is a conductive electrode tube disposed in the liquid flow channel (42), and the tube wall of the conductive electrode tube is closely attached to the side wall of the liquid flow channel (42).

8. The handheld electrostatic sprayer according to claim 5, characterized in that: The handheld housing (1) comprises a gripping portion (11) and a nozzle mounting opening (12), the gripping portion (11) being provided with a grounding electrode (111), and the spray unit (43) being detachably connected to the nozzle mounting opening (12) and the liquid flow channel (42).

9. The handheld electrostatic sprayer according to claim 8, characterized in that: The handheld housing (1) is provided with a liquid storage unit mounting interface, and the liquid storage unit (2) is detachably mounted on the handheld housing (1) via the liquid storage unit mounting interface.

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