Electrically controlled jetting liquid supply device

Abstract

The present application relates to the technical field of liquid injection, and particularly relates to an electrically-controlled liquid injection device, which comprises a shell, a liquid guide device, a control valve and an electric controller, the shell is provided with a connecting cavity for mounting a liquid storage bottle under pressure, the bottom of the connecting cavity is provided with a plug-in seat, and the plug-in seat is provided with an injection channel; the liquid guide device is arranged on the shell, and the liquid guide device comprises a liquid guide inlet and at least one liquid guide outlet; the control valve is arranged in the shell, the liquid inlet of the control valve is communicated with the injection channel, and the liquid outlet of the control valve is communicated with the liquid guide inlet; and the electric controller is arranged on the shell, and the electric controller can drive the valve core of the control valve to perform telescopic movement, so as to open and close the control valve. Automation and accurate control of the injection process can be realized, the injection start-stop response is faster, the injection time and injection amount are easier to control, and the labor intensity of the operator is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid injection, in particular to an electrically controlled liquid injection device. BACKGROUND

[0002] Common liquid injection devices usually use a manual trigger structure or a mechanical valve to control the liquid injection from a liquid bottle under pressure, for example, by pressing a liquid injection head, a trigger type spray gun or a mechanical button to open or close the injection channel. Although such a structure can realize liquid injection, it generally has problems such as dependence on manual operation for opening and closing, lag in response to injection start and stop, difficulty in accurately controlling the injection amount and injection time, high labor intensity for long-term continuous use, and inconvenience for use in space-limited occasions. SUMMARY

[0003] The purpose of the present application is to provide an electrically controlled liquid injection device with rapid opening and closing response and stable injection.

[0004] The purpose of the present application is achieved as follows:

[0005] An electrically controlled liquid injection device, comprising a housing, a liquid guide device, a control valve, an electric controller and a spray head, the housing is provided with a connection cavity for mounting a liquid bottle under pressure, the bottom of the connection cavity is provided with a plug-in seat, the plug-in seat is provided with an injection channel; the liquid guide device is arranged on the housing, and the liquid guide device comprises a liquid guide inlet and at least one liquid guide outlet;

[0006] The control valve is arranged in the housing, the liquid inlet of the control valve is communicated with the injection channel, and the liquid outlet of the control valve is communicated with the liquid guide inlet; the electric controller is arranged on the housing, and the electric controller can drive the valve core of the control valve to extend and retract to open and close the control valve;

[0007] The spray head is arranged at the liquid guide outlet, the spray head comprises a spray head cavity and a spray panel arranged at the outlet of the spray head cavity, the inlet of the spray head cavity is communicated with the liquid guide outlet, and the spray head cavity is provided with a flow guide rib for generating tangential rotation of the liquid; the back surface of the spray panel is spaced apart by a throttling hole, and the surface of the spray panel is spaced apart by a spray hole, the diameter of the spray hole is smaller than the diameter of the throttling hole, the inlet of the throttling hole is communicated with the spray head cavity, the outlet of the throttling hole is communicated with the inlet of the corresponding spray hole, and the outlet of the spray hole faces the outside.

[0008] By setting the connecting cavity for mounting the pressure liquid storage bottle and the plug-in seat with the injection channel on the shell, and connecting the inlet and outlet of the control valve with the injection channel and the liquid guide inlet respectively, and driving the valve core to make extension and retraction movement by the electric controller to open and close the control valve, the pressurized liquid in the liquid storage bottle can be stably delivered to the liquid guide device through the injection channel under the electric control, the opening and stopping of the injection are realized, compared with the traditional manual pressing or mechanical valve type liquid supply structure, the automation and accurate control of the injection process can be realized, the response of the injection opening and stopping is faster, the injection time and injection amount are easier to control, and the labor intensity of the operator is reduced.

[0009] The spray head cavity outlet is provided with a spray panel, a throttle hole is formed on the back surface of the spray panel, a spray hole is formed on the surface, the diameter of the spray hole is smaller than the diameter of the throttle hole, and a flow guide rib for generating tangential rotation of liquid is arranged in the spray head cavity, so that the liquid entering the spray head cavity forms a rotating flow under the action of the tangential flow guide rib, and pressure drop and rectification are realized through the throttle hole and the spray hole, so that a spray mode with uniform distribution and good atomization effect is obtained at the nozzle outlet.

[0010] The purpose of the present application can also be solved by the following technical measures:

[0011] Further, the control valve comprises a valve shell, a valve core, a spring, a first sealing ring and a second sealing ring, the valve shell is sequentially provided with a first channel and a second channel, the first channel is located above the second channel, the outlet of the first channel is communicated with the inlet of the second channel, and the diameter of the first channel is larger than that of the second channel, and a stepped transition part is formed at the connection between the first channel and the second channel;

[0012] The top of the valve shell corresponding to the first channel is provided with a first port, the first port is communicated with the injection channel, the side wall of the valve shell corresponding to the second channel is provided with a second port, the second port is communicated with the liquid guide inlet, and the bottom wall of the valve shell corresponding to the second channel is provided with a third port;

[0013] The diameter of the valve core is smaller than that of the second channel, and an outer ring is arranged at a position close to the head of the valve core, the diameter of the outer ring is smaller than that of the first channel and larger than that of the second channel;

[0014] The outer diameter of the first sealing ring is the same as that of the outer ring, the first sealing ring is sleeved on the valve core, and the upper end surface thereof abuts against the bottom surface of the outer ring;

[0015] The tail part of the valve core extends into the second channel, the second sealing ring is sleeved on the tail part of the valve core at a position below the second port, the second sealing ring seals the gap between the second channel and the tail part of the valve core, the tail end of the valve core extends out of the third port to form a control part, and the second sealing ring prevents liquid from leaking outward along the third port;

[0016] The spring is arranged in the valve housing and sleeved on the head of the valve core, one end of the spring abuts against the inner wall of the valve housing, and the other end of the spring abuts against the outer ring, and the spring provides a reset force to the valve core in the direction of the second passage.

[0017] By arranging the first passage and the second passage in the valve housing and forming a stepped transition part at the connection part of the two passages, and cooperating with the valve core with the outer ring, the first sealing ring sleeved on the valve core, the second sealing ring arranged at the tail of the valve core, and the spring providing the reset force to the valve core, the control valve can realize reliable axial guidance and staged sealing when bearing the pressurized liquid, the first sealing ring and the stepped transition part form the main sealing of the second passage inlet, the second sealing ring prevents the liquid from leaking from the third port, and the spring ensures that the valve core is automatically reset to close the valve when there is no driving, thereby improving the sealing reliability and service life of the valve body under the high-pressure injection working condition and ensuring the safety and stability of the injection liquid supply process.

[0018] Further, the first sealing ring is a double-layer concentric ring structure in the radial direction, the first sealing ring comprises a support layer close to the outer ring and an elastic sealing layer close to the stepped transition part, and the hardness of the support layer is greater than the hardness of the elastic sealing layer.

[0019] The inner diameter of the first sealing ring and the outer diameter of the valve core are in interference fit, so that the first sealing ring moves axially as a whole with the valve core and does not rotate or slip relative to each other.

[0020] The upper end surface of the support layer and the bottom surface of the outer ring are fixedly connected by bonding or hot melting, and the lower end surface of the elastic sealing layer forms an annular planar sealing surface.

[0021] When the valve core is in the initial position, the annular planar sealing surface of the elastic sealing layer abuts against the planar surface of the stepped transition part in a surface contact manner and continuously contacts the planar surface in the circumferential direction, thereby forming full circumferential sealing of the inlet of the second passage to block the pressurized liquid from the injection passage, when the valve core moves upward under the action of the external force on the control part, the elastic sealing layer is elastically compressed and rebounds, so that the first sealing ring rapidly transitions from the full circumferential surface sealing state to the open state within the axial stroke, thereby realizing rapid opening and closing of the injection liquid flow.

[0022] By designing the first sealing ring as a double-layer concentric ring structure in the radial direction, the first sealing ring is composed of the support layer with higher hardness and the elastic sealing layer with lower hardness, and the first sealing ring is in interference fit with the valve core and is fixed with the outer ring by bonding or hot melting, so that the sealing ring can move axially as a whole with the valve core without slipping, and when the valve core is in the initial position, the annular planar sealing surface of the elastic sealing layer forms full circumferential surface contact sealing with the planar surface of the stepped transition part.

[0023] When the valve core is driven to move upward, the elastic sealing layer is elastically compressed and rebounded, and the sealing ring can quickly transition from full-circle sealing state to open state within a short axial stroke, thereby realizing rapid opening and closing of the jet flow, reducing the requirement of electric drive stroke, and being beneficial to improving the response speed and control accuracy of the jetting device.

[0024] Further, the elastic sealing layer is formed with an annular sealing lip protruding from the step-shaped transition portion on the side close to the outer diameter, and is formed with an annular pressure relief groove on the side close to the inner diameter.

[0025] When the valve core is in the initial position, the annular sealing lip is pressed against the flat surface of the step-shaped transition portion in a line contact or narrow surface contact manner, and the annular pressure relief groove is in communication with the inner cavity of the second channel, for buffering pressure fluctuation between the first channel and the second channel.

[0026] When the valve core is driven to move upward by the control portion under the action of external force, the annular sealing lip is separated from the step-shaped transition portion under the action of liquid pressure and elastic deformation of the annular sealing lip, so that the first channel and the second channel are quickly communicated.

[0027] When the jet liquid supply device stops working and the valve core is restored to the initial position under the action of the spring, the annular sealing lip rebounds to the side of the second channel under the action of elastic recovery, forming a micro-negative pressure area in the second channel towards the direction of the valve core, so that the residual liquid near the liquid inlet side generates backflow.

[0028] By forming the annular sealing lip protruding from the step-shaped transition portion on the outer diameter side of the cross section of the elastic sealing layer, and setting the annular pressure relief groove in communication with the inner cavity of the second channel on the inner diameter side, the annular sealing lip is pressed against the step flat surface in a line contact or narrow surface contact manner in the initial closed state, realizing high sealing specific pressure and small opening resistance, and the pressure relief groove can buffer the pressure fluctuation between the first channel and the second channel; when the valve core is moved upward, the sealing lip is quickly separated from the step under the action of liquid pressure and its own elasticity, so that the channels are quickly communicated; during the closing process of the valve core, the sealing lip rebounds and forms a micro-negative pressure area in the second channel towards the direction of the valve core, which produces backflow of the residual liquid near the liquid inlet side, thereby effectively reducing the dripping and liquid hanging phenomenon after jetting.

[0029] Further, a hose is further included, one end of the hose is in communication with the second port, and the other end of the hose is in communication with the liquid inlet, and the hose includes a hose inner layer, a hose intermediate layer and a hose outer layer.

[0030] The inner layer of the hose is a layer of corrosion-resistant elastic material, and the inner wall of the inner layer of the hose is provided with a plurality of annular ribs in a circumferential direction at intervals, the pitch of the annular ribs on the side close to the second port is small, forming a first throttling damping section, and the pitch of the annular ribs on the side away from the second port and close to the liquid guide inlet gradually increases, forming a second throttling damping section;

[0031] The intermediate layer of the hose is a woven reinforcing layer, which is wrapped around the outer periphery of the inner layer of the hose, for improving the pressure resistance and bending resistance of the hose, and the outer layer of the hose is a wear-resistant sheath layer, which is wrapped around the outer periphery of the intermediate layer of the hose.

[0032] By arranging the hose between the second port of the control valve and the liquid guide inlet, and making the pitch of the annular ribs on the side close to the second port small to form a first throttling damping section, and making the pitch of the annular ribs on the side away from the second port and close to the liquid guide inlet gradually increase to form a second throttling damping section, and cooperating with the outer woven reinforcing layer and wear-resistant sheath layer, on the one hand, a multi-stage throttling damping channel from strong to weak is formed in the hose, which effectively suppresses the upstream pressure fluctuation, avoids the instantaneous impact of the injection flow, and improves the injection stability; on the other hand, the overall pressure resistance and bending resistance of the hose are improved, preventing the hose from deforming or bursting under high pressure and bending conditions, thereby ensuring the long-term reliable operation of the injection liquid supply system.

[0033] Further, the electric controller comprises a switch, a motor and a cam, the motor is arranged in the shell, the rotating shaft of the motor is connected with the cam, the cam is arranged corresponding to the position of the control part of the valve core, the switch is arranged outside the shell and is electrically connected with the motor, for controlling the start and stop of the motor, and the motor can drive the rotation of the cam;

[0034] When the protrusion of the cam abuts against and pushes the control part, the valve core is retracted into the valve shell, and the control valve is in an open state; when the protrusion of the cam is away from the control part, the valve core is reset under the action of the spring, and the control valve is in a closed state.

[0035] By specifically configuring the electric controller by the motor in the shell, the cam connected with the rotating shaft of the motor, and the switch outside the shell, the rotation of the motor is converted into the axial extension and retraction movement of the valve core by the cooperation of the protrusion of the cam and the control part of the valve core, the valve core is retracted into the valve shell to open the valve when the protrusion abuts against the control part, and the valve core is reset to close the valve when the protrusion is away under the action of the spring, thereby forming a motor and cam type driving mechanism with simple structure and reliable action; the operator only needs to realize the electric start and stop of the injection liquid supply device through the switch.

[0036] Further, a battery and a circuit board are further included, the battery and the circuit board are arranged in the shell, and the battery, the switch and the motor are respectively electrically connected with the circuit board;

[0037] The switch sends a start signal to the circuit board, which starts the motor and controls the motor to rotate by a predetermined angle. This causes the cam protrusion to push the control unit to retract the valve core into the valve body, or to move the cam protrusion away from the valve core, so that the valve core returns to its initial position under the action of the spring, thereby realizing the electric opening or closing of the control valve.

[0038] By adding a battery and circuit board inside the housing, and electrically connecting them to a switch and a motor respectively, the circuit board controls the motor to rotate a predetermined angle according to the start signal sent by the switch, thereby precisely controlling the working posture of the cam. This enables the valve core to achieve controllable electric reciprocating motion between retracting into the valve housing and returning to the initial position, forming an independent battery-powered control system. This structure can work stably without external power supply and is easy to carry and use.

[0039] Furthermore, it also includes a pressurized liquid storage bottle, the bottle opening of which is provided with a spray head with a spray control function, and the spray head is provided with an internal passage for liquid flow and a valve for opening and closing the internal passage.

[0040] The connecting cavity is used to accommodate and position the liquid storage bottle. The liquid storage bottle can be inserted into the connecting cavity. When the liquid storage bottle is inserted into the cavity, part of the spray head extends into the insertion seat and is pressed by the insertion seat to open the valve of the spray head, so that the internal passage of the spray head is connected to the spray channel. Under the pressure inside the liquid storage bottle, the liquid in the liquid storage bottle enters the spray channel through the internal passage of the spray head and is delivered to the control valve.

[0041] When the liquid storage bottle is inserted into place, the insertion seat presses against the spray head to open the internal valve, automatically connecting the internal passage of the liquid storage bottle with the spray channel of the device. The liquid is then delivered into the control valve using the pressure of the liquid storage bottle itself. This structure enables quick loading and unloading of the liquid storage bottle and automatic opening and closing, avoiding the risk of leakage when replacing the liquid storage bottle and ensuring a reliable connection between the pressurized liquid and the spray supply device.

[0042] Furthermore, the liquid guiding device includes a liquid guiding seat and comb teeth. The liquid guiding seat has a liquid dispensing chamber inside. The liquid guiding seat is provided with a liquid guiding inlet and at least one liquid guiding outlet. The liquid guiding inlet and the liquid guiding outlet are respectively connected to the liquid dispensing chamber. The comb teeth are spaced apart on the liquid guiding seat and located next to the corresponding liquid guiding outlet.

[0043] By setting a liquid guiding seat with a liquid separating chamber in the liquid guiding device, and connecting the liquid separating chamber with a liquid guiding inlet and at least one liquid guiding outlet respectively, and arranging comb teeth adjacent to the liquid guiding outlet on the liquid guiding seat, the device can be combed in conjunction with the comb teeth during spraying.

[0044] Further, the injection hole is gradually tapered from the inlet end to the outlet end along the injection direction to form a tapered section, the outlet of the tapered section is provided with a cylindrical micro-hole section, the length to diameter ratio of the micro-hole section is 2-6, and the outer surface of the injection panel at the outlet of each injection hole is provided with a rounded transition edge; in the working state, the liquid is accelerated through the tapered section and forms a high-speed turbulent flow in the micro-hole section, and when the liquid is ejected from the injection hole, a fine jet or mist injection is formed, and the attachment of the liquid on the injection panel is reduced by the rounded transition edge at the end of the injection, thereby reducing the dripping.

[0045] By designing the injection hole as a tapered section gradually tapered from the inlet end to the outlet end along the injection direction, and providing a cylindrical micro-hole section with a length to diameter ratio of 2-6 at the outlet of the tapered section, and forming a rounded transition edge on the outer surface of the injection panel at the outlet of each injection hole, the liquid is accelerated in the tapered section, forms a high-speed turbulent flow in the micro-hole section and is stably guided, and when the liquid is ejected from the injection hole, a fine jet or mist injection is formed, the atomization quality and coverage uniformity of the injection beam are improved; at the end of the injection, the rounded transition edge reduces the attachment of the liquid on the surface of the injection panel and the tendency of wall hanging, thereby significantly reducing the dripping phenomenon, improving the closing cleanliness of the nozzle and the use experience.

[0046] The beneficial effects of the present application are as follows:

[0047] The present application, by providing a connection cavity for mounting a pressure liquid storage bottle, a plug-in seat and a spray channel communicating with the control valve in the shell, and using an electric controller to drive the valve core to extend and retract to open and close the control valve, realizes the electric spray control from the liquid storage bottle to the liquid guide device through the spray channel. Compared with the traditional manual pressing or mechanical valve structure, the automatic start and stop of the spraying process is realized, the spraying response is fast, the repeatability is good, and the manual operation intensity is obviously reduced.

[0048] The present application, by providing a connection cavity for mounting a pressure liquid storage bottle, a plug-in seat and a spray channel communicating with the control valve in the shell, and using an electric controller to drive the valve core to extend and retract to open and close the control valve, realizes the electric spray control from the liquid storage bottle to the liquid guide device through the spray channel. Compared with the traditional manual pressing or mechanical valve structure, the automatic start and stop of the spraying process is realized, the spraying response is fast, the repeatability is good, and the manual operation intensity is obviously reduced.

[0049] The present application, by providing a connection cavity for mounting a pressure liquid storage bottle, a plug-in seat and a spray channel communicating with the control valve in the shell, and using an electric controller to drive the valve core to extend and retract to open and close the control valve, realizes the electric spray control from the liquid storage bottle to the liquid guide device through the spray channel. Compared with the traditional manual pressing or mechanical valve structure, the automatic start and stop of the spraying process is realized, the spraying response is fast, the repeatability is good, and the manual operation intensity is obviously reduced.

[0050] The present application, the spray head forms tangential rotating flow by means of the flow guide rib, and obtains fine spray flow or mist spray with small particle size and uniform distribution by the throttle hole on the back surface, the spray hole on the front surface and the spray hole structure composed of the shrinkage cone section and the cylindrical micro-hole section when spraying, and the round corner transition edge at the outlet of the spray panel can also reduce liquid adhesion and dripping, significantly improving the atomization quality and use effect of the spraying device. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 Schematic diagram of the electrically controlled spray liquid supply device (stop spraying state).

[0052] Figure 2 Cross-sectional view of the electrically controlled spray liquid supply device (stop spraying state).

[0053] Figure 3 Another angle cross-sectional view of the electrically controlled spray liquid supply device (stop spraying state).

[0054] Figure 4 Cross-sectional view of the disassembled state of the liquid storage bottle and the shell (stop spraying state).

[0055] Figure 5 Schematic diagram of the disassembled state of the liquid storage bottle and the shell (stop spraying state).

[0056] Figure 6 Another angle schematic diagram of the disassembled state of the liquid storage bottle and the shell (stop spraying state).

[0057] Figure 7 Schematic diagram of the electrically controlled spray liquid supply device (except shell, stop spraying state).

[0058] Figure 8 Cross-sectional view of the electrically controlled spray liquid supply device (continuous spraying state).

[0059] Figure 9 Another angle cross-sectional view of the electrically controlled spray liquid supply device (continuous spraying state).

[0060] Figure 10 Schematic diagram of the electrically controlled spray liquid supply device (except shell, continuous spraying state).

[0061] Figure 11 Figure 2 Enlarged view of part A.

[0062] Figure 12 Cross-sectional view of the first sealing ring.

[0063] Figure 13 Figure 8 Enlarged view of part B.

[0064] ​​Figure 14 is a schematic view of the spray head.

[0065] Figure 15 is a sectional view of the local hose. DETAILED DESCRIPTION

[0066] The application will be further described below in conjunction with the drawings and embodiments:

[0067] Embodiments, in conjunction with Figures 1 to 15 As shown in the drawings, an electrically controlled liquid injection device comprises a housing 1, a liquid guide 2, a control valve 3 and an electric controller 4, the housing 1 is provided with a connecting cavity 11 for mounting a liquid storage bottle under pressure, the bottom of the connecting cavity 11 is provided with a plug-in seat 12, the plug-in seat 12 is provided with an injection channel 121;

[0068] The liquid guide 2 is arranged on the housing 1, and the liquid guide 2 comprises a liquid guide inlet 21 and at least one liquid guide outlet 22;

[0069] The control valve 3 is arranged in the housing 1, the liquid inlet of the control valve 3 is in communication with the injection channel 121, and the liquid outlet of the control valve 3 is in communication with the liquid guide inlet 21;

[0070] The electric controller 4 is arranged on the housing 1, and the electric controller 4 can drive the valve core of the control valve 3 to extend and retract, so as to open and close the control valve 3, thereby electrically controlling the injection and stop of the liquid delivered from the liquid storage bottle to the liquid guide 2 through the injection channel 121.

[0071] Further, the control valve 3 comprises a valve shell 31, a valve core 32, a spring 33, a first sealing ring 34 and a second sealing ring 35, the valve shell 31 is sequentially provided with a first channel 311 and a second channel 312, the first channel 311 is located above the second channel 312, the outlet of the first channel 311 is in communication with the inlet of the second channel 312, and the diameter of the first channel 311 is greater than that of the second channel 312, and the connection between the first channel 311 and the second channel 312 forms a stepped transition part 313;

[0072] The valve shell 31 is provided with a first port 36 corresponding to the top of the first channel 311, the first port 36 is in communication with the injection channel 121, the valve shell 31 is provided with a second port 37 corresponding to the side wall of the second channel 312, the second port 37 is in communication with the liquid guide inlet 21, and the valve shell 31 is provided with a third port 38 corresponding to the bottom wall of the second channel 312;

[0073] The diameter of the valve core 32 is smaller than that of the second channel 312, and the valve core 32 is provided with an outer ring 321 at a position close to the head, and the diameter of the outer ring 321 is smaller than that of the first channel 311 and greater than that of the second channel 312.

[0074] The outer diameter of the first sealing ring 34 is the same as that of the outer ring 321, the first sealing ring 34 is sleeved on the valve core 32, and the upper end surface thereof abuts against the bottom surface of the outer ring 321;

[0075] The tail of the valve core 32 extends into the second channel 312, the second sealing ring 35 is sleeved on the tail of the valve core 32 at a position below the second port 37, the second sealing ring 35 seals the gap between the second channel 312 and the tail of the valve core 32, the tail end of the valve core 32 extends out of the third port 38 to form a control portion 322, and the second sealing ring 35 prevents liquid from leaking outward along the third port 38;

[0076] The spring 33 is arranged in the valve housing 31 and is sleeved on the head of the valve core 32, one end of the spring 33 abuts against the inner wall of the valve housing 31, the other end of the spring 33 abuts against the outer ring 321, and the spring 33 provides a restoring force to the valve core 32 in the direction of the second channel 312.

[0077] Further, the first sealing ring 34 has a radial double-layer concentric ring structure, the first sealing ring 34 includes a support layer 341 close to one side of the outer ring 321 and an elastic sealing layer 342 close to one side of the stepped transition portion 313, and the hardness of the support layer 341 is greater than that of the elastic sealing layer 342;

[0078] The inner diameter of the first sealing ring 34 is in interference fit with the outer diameter of the valve core 32, so that the first sealing ring 34 moves axially with the valve core 32 as a whole and does not rotate or slip relative to the valve core 32;

[0079] The upper end surface of the support layer 341 is fixedly connected to the bottom surface of the outer ring 321 in a bonding or hot melting manner, and the lower end surface of the elastic sealing layer 342 forms an annular planar sealing surface;

[0080] When the valve core 32 is in the initial position, the annular planar sealing surface abuts against the planar surface of the stepped transition portion 313 in a surface contact manner and continuously contacts the planar surface in the circumferential direction, thereby forming full circumferential sealing of the inlet of the second channel 312 to block the pressurized liquid from the jetting channel 121, when the valve core 32 moves upward under the action of external force on the control portion 322, the elastic sealing layer 342 is elastically compressed and rebounds, so that the first sealing ring 34 rapidly transitions from the full circumferential sealing state to the open state within the axial stroke, thereby realizing rapid opening and closing of the jetting liquid flow.

[0081] Further, the elastic sealing layer 342 has a cross section close to the outer diameter side, and the cross section close to the outer diameter side forms an annular sealing lip 343 protruding toward the stepped transition portion 313, and the cross section close to the inner diameter side of the elastic sealing layer 342 forms an annular pressure relief groove 344;

[0082] When the valve core 32 is in the initial position, the annular sealing lip 343 is pressed against the flat surface of the stepped transition 313 in line contact or narrow surface contact, and the annular pressure relief groove 344 is in communication with the inner cavity of the second channel 312 for buffering pressure fluctuations between the first channel 311 and the second channel 312;

[0083] When the valve core 32 is lifted by external force on the control part 322, the annular sealing lip 343 is separated from the stepped transition 313 under the action of liquid pressure and its own elastic deformation, so that the first channel 311 and the second channel 312 are quickly communicated;

[0084] When the liquid injection device stops working and the valve core 32 returns to the initial position under the action of the spring 33, the annular sealing lip 343 rebounds to the side of the second channel 312 under the action of elastic recovery, forming a micro-negative pressure area in the second channel 312 towards the valve core 32, so that the residual liquid near the liquid guide inlet 21 flows back.

[0085] Further, a hose 5 is provided, one end of the hose 5 being in communication with the second port 37, and the other end of the hose 5 being in communication with the liquid guide inlet 21, the hose 5 comprising a hose inner layer 51, a hose intermediate layer 52 and a hose outer layer 53;

[0086] The hose inner layer 51 is a layer of corrosion-resistant elastic material, and annular ribs 511 are arranged on the inner wall of the hose inner layer 51 in a circumferential direction, the pitch of the annular ribs 511 near the second port 37 being small, forming a first throttling damping section 54, and the pitch of the annular ribs 511 away from the second port 37 and near the liquid guide inlet 21 gradually increasing, forming a second throttling damping section 55;

[0087] The hose intermediate layer 52 is a woven reinforcing layer, which is wrapped around the outer periphery of the hose inner layer 51 to improve the pressure resistance and bending resistance of the hose 5, and the hose outer layer 53 is a wear-resistant sheath layer, which is wrapped around the outer periphery of the hose intermediate layer 52.

[0088] Further, the electric controller 4 comprises a switch 41, a motor 42 and a cam 43, the motor 42 being arranged in the housing 1, the rotating shaft of the motor 42 being connected with the cam 43, the cam 43 being arranged corresponding to the position of the control part 322 of the valve core 32, the switch 41 being arranged outside the housing 1 and being electrically connected with the motor 42 for controlling the start and stop of the motor 42, and the motor 42 drives the rotation of the cam 43;

[0089] When the convex 431 of the cam 43 abuts against and pushes the control part 322, the valve core 32 is retracted into the valve shell 31, and the control valve 3 is in an open state; when the convex 431 of the cam 43 is away from the control part 322, the valve core 32 is reset under the action of the spring 33, and the control valve 3 is in a closed state.

[0090] Further, a battery and a circuit board are arranged in the shell 1, and the battery, the switch 41 and the motor 42 are electrically connected to the circuit board respectively.

[0091] The switch 41 sends a starting signal to the circuit board, the circuit board starts and controls the motor 42 to rotate by a predetermined angle, so that the convex 431 of the cam 43 pushes the control part 322 to retract the valve core 32 into the valve shell 31, or the convex 431 of the cam 43 is away from the valve core 32, so that the valve core 32 is reset to the initial position under the action of the spring 33, thereby realizing the electric opening or closing of the control valve 3.

[0092] Further, a pressure storage bottle 7 is further included, and the bottle mouth of the storage bottle 7 is provided with a liquid spraying head 71 having a spraying control function, and the liquid spraying head 71 is provided with an internal passage 72 for liquid flow and a valve piece 73 for opening and closing the internal passage 72.

[0093] The connecting cavity 11 is used for accommodating and positioning the storage bottle 7, and the storage bottle 7 can be inserted into the connecting cavity 11, and when the storage bottle 7 is inserted in place, part of the liquid spraying head 71 extends into the insertion seat 12 and is pressed by the insertion seat 12 to open the valve piece 73 of the liquid spraying head 71, so that the internal passage 72 of the liquid spraying head 71 is in communication with the spraying channel 121, so that under the pressure of the storage bottle 7, the liquid in the storage bottle 7 flows into the spraying channel 121 through the internal passage 72 of the liquid spraying head 71 and is delivered to the control valve 3.

[0094] Further, a spraying head 8 is further included, the liquid guide device 2 includes a liquid guide seat 23 and a comb tooth 24, the liquid guide seat 23 is provided with a liquid distribution cavity, the liquid guide seat 23 is provided with the liquid guide inlet 21 and at least one liquid guide outlet 22, the liquid guide inlet 21 and the liquid guide outlet 22 are in communication with the liquid distribution cavity respectively, and the comb tooth 24 is arranged on the liquid guide seat 23 and located beside the corresponding liquid guide outlet 22.

[0095] The spray head 8 is arranged at the liquid guide outlet 22, the spray head 8 comprises a spray head cavity 81 and a spray panel 9 arranged at the outlet of the spray head cavity 81, the back of the spray panel 9 is spaced apart with a throttle hole 91, the surface of the spray panel 9 is spaced apart with a spray hole 92, the aperture of the spray hole 92 is smaller than the aperture of the throttle hole 91, the inlet of the throttle hole 91 is communicated with the spray head cavity 81, the outlet of the throttle hole 91 is communicated with the inlet of the corresponding spray hole 92, and the outlet of the spray hole 92 is directed to the outside.

[0096] The spray head cavity 81 is provided with a flow guide rib 811 for generating tangential rotation of the liquid, and the inlet of the spray head cavity 81 is communicated with the liquid guide outlet 22.

[0097] Further, the spray hole 92 is gradually contracted from the inlet end to the outlet end along the spray direction to form a contraction cone section 921, the outlet of the contraction cone section 921 is provided with a cylindrical micro-hole section 922, the length to diameter ratio of the micro-hole section 922 is 2-6, and the outer surface of the spray panel 9 at the outlet of each spray hole 92 is provided with a round transition edge; in the working state, the liquid is accelerated through the contraction cone section 921 and forms high-speed turbulent flow in the micro-hole section 922, and when the liquid is sprayed from the spray hole 92, a small spray or mist spray is formed, and the round transition edge is used to reduce the adhesion of the liquid on the spray panel 9 at the end of the spray, thereby reducing dripping.

[0098] Working principle:

[0099] The pressurized liquid storage bottle 7 (which can be a commercially available pressurized liquid storage bottle) is inserted into the connecting cavity 11 of the shell 1 and pushes open the valve 73 of the liquid spraying head 71, so that the pressurized liquid in the liquid storage bottle 7 enters the spray channel 121 of the plug-in seat 12 through the internal passage 72 of the liquid spraying head 71, and is communicated with the first channel 311 of the control valve 3;

[0100] When the user presses the switch 41, the battery-powered driving motor 42 rotates, the motor 42 rotates in a predetermined angle range through the circuit board control and drives the cam 43 to rotate, the protrusion 431 of the cam 43 pushes the control part 322 at the tail end of the valve core 32, so that the valve core 32 is retracted into the valve shell 31 against the reset force of the spring 33, the first sealing ring 34 moves upward with the valve core 32 and is separated from the stepped transition part 313, the second channel 312 is opened, and the pressurized liquid is sequentially conveyed to the liquid guide device 2 through the first channel 311, the second channel 312 and the hose 5 connected with the second port 37.

[0101] The first throttling damping section 54 and the second throttling damping section 55 arranged in sequence on the inner layer 51 of the hose from the second port 37 to the liquid guide inlet 21 grade throttle and buffer the instantaneous pressure fluctuation, so that the fluid is stabilized before entering the liquid distribution chamber of the liquid guide seat 23, then the liquid enters the corresponding nozzle cavity 81 through the at least one liquid guide outlet 22, forms a tangential rotating flow under the action of the flow guide rib 811 in the nozzle cavity 81, and then enters the jet hole 92 after pressure drop through the throttling hole 91, is further accelerated in the converging cone section 921 and forms high-speed turbulent flow in the cylindrical micro-hole section 922, and when the jet hole 92 is ejected, fine spray or mist spray with small particle size and uniform distribution is formed at the outlet;

[0102] When the machine is turned off, the motor 42 drives the cam 43 to rotate to the position where the protrusion 431 is away from the control part 322 under the control of the circuit board, the valve core 32 is reset downward under the action of the spring 33, the annular flat sealing surface of the first sealing ring 34 re-closes the second channel 312 with the stepped transition part 313, and the annular sealing lip 343 of the elastic sealing layer 342 forms a micro-negative pressure area in the second channel 312 towards the valve core 32 in the recovery process, which produces back suction to the residual liquid near the liquid guide inlet 21, so that the residual liquid in the nozzle 8 is partially sucked back, and the round corner transition edge of the outer surface of the jet panel 9 reduces liquid adhesion, thereby realizing stable jetting amount, good atomization effect, effectively reducing dripping and liquid hanging phenomenon at the end of jetting, and obtaining clean and beautiful jetting effect.

[0103] As used in the present invention, the terms "first", "second", etc. do not indicate any order, quantity or importance, but are only used for differentiation. As used in the present invention, the terms "one", "a", etc. do not indicate a limitation of quantity, but indicate the existence of at least one mentioned object. As used in the present invention, the terms indicating orientation or position, such as "top", "bottom", "side", "longitudinal", "transverse", "middle", "center", "outer", "inner", "horizontal", "vertical", "left", "right", "up", "down", etc. mean reflecting relative position, not absolute position. The above-described embodiments only express several embodiments of the present invention, which are described in more detail and in more detail, but cannot be understood as limiting the scope of the present invention. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An electrically controlled jet liquid supply device, comprising a housing, a liquid guiding device, a control valve, an electric controller, and a nozzle, characterized in that: The housing is provided with a connection cavity for installing a pressurized liquid storage bottle, and the bottom of the connection cavity is provided with a plug-in seat, which is provided with a spray channel; the liquid guiding device is provided on the housing, and the liquid guiding device includes a liquid guiding inlet and at least one liquid guiding outlet; The control valve is located inside the housing, with its inlet connected to the injection channel and its outlet connected to the liquid inlet. The electric controller is located on the housing and can drive the valve core of the control valve to extend and retract to open and close the control valve. The nozzle is located at the liquid outlet. The nozzle includes a nozzle cavity and a spray panel located at the outlet of the nozzle cavity. The inlet of the nozzle cavity is connected to the liquid outlet. The nozzle cavity is provided with guide ribs that cause the liquid to rotate tangentially. The back of the spray panel is spaced apart with throttling orifices, and the surface of the spray panel is spaced apart with spray holes. The diameter of the spray holes is smaller than the diameter of the throttling orifices. The inlet of the throttling orifice is connected to the nozzle cavity, and the outlet of the throttling orifice is connected to the inlet of the corresponding spray hole. The outlet of the spray hole faces outward. The control valve includes a valve body, a valve core, a spring, a first sealing ring, and a second sealing ring. A first channel and a second channel are sequentially opened inside the valve body. The first channel is located above the second channel. The outlet of the first channel is connected to the inlet of the second channel, and the diameter of the first channel is larger than the diameter of the second channel. A stepped transition section is formed at the connection between the first channel and the second channel. The valve housing has a first port at the top corresponding to the first channel, which is connected to the injection channel. The valve housing has a second port on the side wall corresponding to the second channel, which is connected to the liquid inlet. The valve housing has a third port on the bottom wall corresponding to the second channel. The diameter of the valve core is smaller than the diameter of the second channel. The valve core has an outer ring near the head, and the diameter of the outer ring is smaller than the diameter of the first channel but larger than the diameter of the second channel. The outer diameter of the first sealing ring is the same as the outer diameter of the outer ring. The first sealing ring is fitted on the valve core, and its upper end face abuts against the bottom surface of the outer ring. The tail of the valve core extends into the second channel. The tail of the valve core is fitted with the second sealing ring at the position below the second port. The second sealing ring seals the gap between the second channel and the tail of the valve core. The tail of the valve core extends out of the third port to form a control part. The second sealing ring prevents liquid from leaking outward along the third port. The spring is disposed inside the valve housing and sleeved on the head of the valve core. One end of the spring abuts against the inner wall of the valve housing, and the other end of the spring abuts against the outer ring. The spring provides a restoring force to the valve core in the direction of the second channel. The first sealing ring has a double-layer concentric ring structure in the radial direction. The first sealing ring includes a support layer near the outer ring and an elastic sealing layer near the stepped transition portion. The hardness of the support layer is greater than the hardness of the elastic sealing layer. The inner diameter of the first sealing ring is interference-fitted with the outer diameter of the valve core, so that the first sealing ring moves axially with the valve core as a whole without relative rotation or slippage. The upper end face of the support layer is fixedly connected to the bottom surface of the outer ring by bonding or hot melting, and the lower end face of the elastic sealing layer forms an annular planar sealing surface. When the valve core is in the initial position, the annular planar sealing surface is in close contact with the plane of the stepped transition part in a face-to-face manner and is in continuous contact with it in the circumference, forming a full circumferential seal on the inlet of the second channel to block the pressurized liquid from the injection channel. When the valve core moves upward in the control part under the action of external force, the elastic sealing layer undergoes elastic compression and rebound, so that the first sealing ring quickly transitions from the full circumferential sealing state to the open state within the axial stroke. The cross-section of the elastic sealing layer forms an annular sealing lip protruding towards a stepped transition portion on the side near the outer diameter, and an annular pressure relief groove is formed on the side of the elastic sealing layer near the inner diameter. When the valve core is in the initial position, the annular sealing lip presses against the plane of the stepped transition portion in a line contact or narrow surface contact manner, and the annular pressure relief groove communicates with the inner cavity of the second channel; When the valve core moves upward in the control section under the action of external force, the annular sealing lip disengages from the stepped transition section under the action of liquid pressure and its own elastic deformation, so that the first channel and the second channel are quickly connected. When the injection supply device stops working and the valve core returns to its initial position under the action of the spring, the annular sealing lip rebounds towards the second channel side under the elastic recovery action, forming a micro negative pressure zone in the second channel towards the valve core.

2. The electrically controlled jet liquid supply device according to claim 1, characterized in that: It also includes a hose, one end of which is connected to the second port and the other end of which is connected to the liquid inlet. The hose includes an inner layer, a middle layer and an outer layer. The inner layer of the hose is a corrosion-resistant elastic material layer. The inner wall of the inner layer of the hose is provided with several annular ribs at intervals along the circumference. The pitch of the annular ribs on the side of the inner layer of the hose closer to the second port is small, forming the first throttling damping section. The pitch of the annular ribs on the side of the inner layer of the hose further away from the second port and closer to the liquid inlet gradually increases, forming the second throttling damping section. The middle layer of the hose is a braided reinforcement layer, which covers the outer periphery of the inner layer of the hose to improve the pressure resistance and bending resistance of the hose. The outer layer of the hose is a wear-resistant sheath layer, which covers the outer periphery of the middle layer of the hose.

3. The electrically controlled jet liquid supply device according to claim 1, characterized in that: The electric controller includes a switch, a motor, and a cam. The motor is housed inside the housing, and the motor shaft is connected to the cam. The cam is positioned corresponding to the control section of the valve core. The switch is located outside the housing and electrically connected to the motor to control the start and stop of the motor. The motor can drive the cam to rotate. When the cam protrusion abuts against and pushes the control unit, causing the valve core to retract into the valve housing, the control valve is in the open state; when the cam protrusion moves away from the control unit, the valve core is reset under the action of the spring, and the control valve is in the closed state.

4. The electrically controlled jet liquid supply device according to claim 3, characterized in that: It also includes a battery and a circuit board, the battery and the circuit board being disposed inside the housing, and the battery, switch and motor being electrically connected to the circuit board respectively; The switch sends a start signal to the circuit board, which starts the motor and controls the motor to rotate by a predetermined angle. This causes the cam protrusion to push the control unit to retract the valve core into the valve body, or to move the cam protrusion away from the valve core, so that the valve core returns to its initial position under the action of the spring, thereby realizing the electric opening or closing of the control valve.

5. The electrically controlled jet liquid supply device according to any one of claims 1-4, characterized in that: It also includes a pressurized liquid storage bottle, the bottle opening of which is provided with a spray head with a spray control function, and the spray head is provided with an internal passage for liquid flow and a valve for opening and closing the internal passage. The connecting cavity is used to accommodate and position the liquid storage bottle. The liquid storage bottle can be inserted into the connecting cavity. When the liquid storage bottle is inserted into the cavity, part of the spray head extends into the insertion seat and is pressed by the insertion seat to open the valve of the spray head, so that the internal passage of the spray head is connected to the spray channel. Under the pressure inside the liquid storage bottle, the liquid in the liquid storage bottle enters the spray channel through the internal passage of the spray head and is delivered to the control valve.

6. The electrically controlled jet liquid supply device according to claim 1, characterized in that: The liquid guiding device includes a liquid guiding seat and comb teeth. The liquid guiding seat has a liquid dispensing chamber inside. The liquid guiding seat is provided with a liquid guiding inlet and at least one liquid guiding outlet. The liquid guiding inlet and the liquid guiding outlet are respectively connected to the liquid dispensing chamber. The comb teeth are spaced apart on the liquid guiding seat and located next to the corresponding liquid guiding outlet.

7. The electrically controlled jet liquid supply device according to claim 1, characterized in that: The spray hole gradually narrows from the inlet end to the outlet end along the spray direction to form a contraction cone section. The outlet of the contraction cone section is provided with a cylindrical micro-hole section. The length-to-diameter ratio of the micro-hole section is 2 to 6. The outer surface of the spray panel at the outlet of each spray hole is provided with a rounded transition edge. In operation, the liquid is accelerated through the constricting cone section and forms a high-speed turbulent flow within the micro-orifice section. When ejected from the injection hole, it forms a fine jet or mist. At the end of the injection, the rounded transition edge reduces the adhesion of the liquid to the injection panel, thereby reducing dripping.

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