US20220003225A1 - Fast inflating air pump - Google Patents

Fast inflating air pump Download PDF

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Publication number
US20220003225A1
US20220003225A1 US17/447,837 US202117447837A US2022003225A1 US 20220003225 A1 US20220003225 A1 US 20220003225A1 US 202117447837 A US202117447837 A US 202117447837A US 2022003225 A1 US2022003225 A1 US 2022003225A1
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United States
Prior art keywords
inflating
air pump
piston
field effect
fast
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Pending
Application number
US17/447,837
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English (en)
Inventor
Jinhua Chen
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Individual
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Individual
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Publication of US20220003225A1 publication Critical patent/US20220003225A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1066—Valve plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B25/00—Multi-stage pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0022—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity

Definitions

  • the present disclosure relates to an air pump, and more particularly to a fast electric inflating air pump.
  • the inflating air pump works by an electric motor.
  • the working principle is that the motor pimps air into objects that need to be inflated, such as tires, boat cushions, etc., which can realize the effect of inflation automatically.
  • the inflating pump uses a single inflating method, that is, it is driven by a motor to inflate the object to be inflated.
  • a single inflating method that is, it is driven by a motor to inflate the object to be inflated.
  • the single inflation method leads to the defects of low inflation efficiency and long inflation time.
  • air leakage occurs, which makes the working efficiency of the inflator pump even lower.
  • the present disclosure is designed to provide a fast electric inflating air pump to solve the problem of low inflation efficiency.
  • the controller instructs the blower to operate until an air pressure value reaches a predetermined threshold, and the controller instructs the blower to stop working. At this moment, the controller instructs the motor to drive the piston to move back and forth in the inflating tube to achieve inflation, until the air pressure value increases to another predetermined threshold, then the controller instructs the motor to stop operating.
  • the inlet tube includes an inlet port which is exposed on the outside of the housing for communicating with external air, and another port is communicated with the communicating pipe.
  • the inflating tube includes a small-diameter section and a large-diameter section extending from the small-diameter section, the inflation port is formed in the small-diameter section.
  • a diameter of the large-diameter section is larger than that of the small-diameter section.
  • the piston is movably placed in the large-diameter section, and on condition that the controller instructs the motor to drive the piston to move, the piston linearly moves back and forth in the large-diameter section.
  • a frame connected with an inflating tube is arranged in the housing, and the gear plate is supported by the frame.
  • the gear plate has an external teeth provided on the outer periphery of the gear plate.
  • the motor has a shaft with a transmission gear, the gear plate meshes with the transmission gear of the motor.
  • the blower is arranged in the inlet tube.
  • the controller is provided with a controlling circuit for controlling the operation of the air pump, including a power supply, a power switch, a controlling unit and two selecting switches.
  • Each of the two selecting switches has an input terminal connected with the power supply, an output terminal connected with the air pump, a ground terminal, and a controlling terminal connected with the controlling unit.
  • the selecting switch includes a connecting terminal connected to the air pump, and the connecting terminal of the selecting switch is selectively connected to the input terminal or the ground terminal of the selecting switch according to an selecting signal from the controlling unit.
  • an output terminal of a first selecting switch is connected with the input terminal or the ground terminal of the selecting switch, and an output terminal of a second selecting switch is connected with the ground terminal or the input terminal of the selecting switch correspondingly.
  • the field effect transistor is defined as an N-channel field effect transistor or a P-channel field effect transistor.
  • the controller includes a flip-flop and two triodes.
  • a bases of the two triodes are respectively connected to the two output terminals of the flip-flop, a collector of the two triodes are respectively connected to the controlling terminals of the two selecting switches, and a emitter of the two triodes connected with the ground respectively.
  • the flip-flop outputs a high and a low-level signal to make one of the two triodes turn on, and the other turns off.
  • the controller instructs the blower to restart the rapid inflation, until the inflation pressure reaches a predetermined threshold, then stops the blower, and synchronously instructs the motor to drive the piston to move back and forth to inflate to achieve high pressure inflation.
  • the inflation pressure reaches a predetermined threshold, so that the low pressure and high pressure are sequentially converted to inflate, and the effect of fast inflation can be achieved.
  • FIG. 1 is an isometric view of an inflating air pump in accordance with an exemplary embodiment of the present disclosure, with a part of a housing thereof being removed away.
  • FIG. 6 is a cross-sectional view of an inflating tube of the inflating air pump in FIG. 1 .
  • FIG. 8 is a topological structure diagram of the controlling circuit of the inflating air pump in FIG. 7 .
  • the fast inflating air pump comprises a housing 100 having an upper shell 1012 and a lower shell 1011 , a controller 800 , a blower 501 , a motor 400 , an inlet tube 203 and an inflating tube are arranged in the housing 100 .
  • the inflating tube includes an inflating port 102 which is exposed on the outside of the housing 100 to communicate with external air.
  • a piston is at least partially received in the inflation tube.
  • the piston includes a head end 700 , a tail end 702 and a piston rod 701 between the head end 700 and the tail end 702 .
  • a communicating pipe 300 is arranged between the inflating tube and the inlet tube 203 , and a one-way valve 500 is arranged in the communicating pipe 300 .
  • the one-way valve 500 unidirectionally circulates air from the communicating pipe 300 to the inflating pipe.
  • the blower 501 in the inlet tube 203 drives the air to be discharged through the inflating port 102 of the inflating tube.
  • the controller 800 instructs the blower 501 to work until an air pressure value reaches a predetermined threshold, and the controller 800 instructs the blower 501 to stop working. At this moment, the controller 800 instructs the motor 400 to drive the piston to move back and forth in the inflating tube to achieve inflation, until the air pressure value increases to another predetermined threshold, then the controller 800 instructs the motor 400 to stop operating.
  • the controller 800 first instructs the blower 501 to rotate to inflate a target object, such as a tire, until an internal air pressure of the inflating air pump reaches a predetermined threshold, and then instructs the blower 501 to stop working.
  • the motor 400 is immediately started to drive the piston to slide back and forth to inflate into the inflating tube to achieve inflation under a relatively high pressure state until the air pressure of the inflating pump reaches another predetermined threshold.
  • the internal air pressure of the inflating air pump is increased from a low air pressure to a relatively high air pressure to achieve the effect of rapid inflation.
  • the upper shell 1011 and the lower shell 1012 enclose a housing 100 with a cavity.
  • the housing 100 may also be enclosed by other components, and is not limited to the enclosed manner of the upper shell 1011 and the lower shell 1012 in the present disclosure.
  • the inlet tube 203 includes an inlet port 101 which is exposed on the outside of the housing 100 for communicating with external air, and another port is communicated with the inflating tube via the communicating pipe 300 .
  • the inflating tube includes a small-diameter section 201 and a large-diameter section 202 extending from the small-diameter section 201 , the inflation port 102 is formed in the small-diameter section 201 .
  • the terms “large diameter” and “small diameter” here are relative sizes and do not have the concept of actual size.
  • a diameter of the large-diameter section 202 is larger than that of the small-diameter section 201 .
  • the piston is movably placed in the large-diameter section 202 , and on condition that the controller 800 instructs the motor 400 to drive the piston to move, the piston linearly moves back and forth in the large-diameter section 202 .
  • the annular wall has an inner wall 713 extending from the two bridges 712 , an outer wall 714 extending from the inner wall 713 for sliding contact with the inflating tube, and a groove 715 provided between the inner wall 713 and the outer wall 714 .
  • the central part 711 of the damper 710 blocks a plurality of holes 704 of the head end 700 so that air can only flow into the inflating tube.
  • two notches 708 are provided on the upper flange 705 for matching the two bridges 712 .
  • the two bridges 712 are respectively arranged in the two notches 708 to improve the firmness of the damper 710 .
  • An air chamber is formed by the valve plate 601 , an head end 700 with the damper 710 and a part of the large-diameter section 202 of the inflating tube.
  • the head end 700 slides along a direction gradually approaching the valve plate 601 , and the air in the air chamber can only flow into the small-diameter section 201 through the holes of the valve plate 601 .
  • the holes of the valve plate 601 is blocked by the rubber sheet 603 , and air enters the air chamber through the holes of the head end 700 for balancing air pressure.
  • the rotation speed of the motor 400 may reach 10,000 revolutions per minute.
  • the piston quickly presses the air in the air chamber into the inflating tube for obtaining high air pressure. This enhances the inflation efficiency of the inflating air pump and can meet higher pressure inflation requirements with the assistance of the blower.
  • the head end 700 of the piston is received in the large-diameter section 202 , and the piston rod 701 is at least partially exposed outside the he large-diameter section 202 .
  • the tail end 702 has a ring 402 and a hole provided in the central area of the ring 402 .
  • the motor drives the piston by a transmission assembly.
  • the transmission assembly includes a gear plate 410 driven by the motor 400 , an eccentric wheel 403 , a rotating shaft 411 located in the center of the gear plate 410 and connected to the eccentric wheel 403 , and a transmission rod 405 located on the eccentric wheel.
  • the transmission rod 405 is sleeved in the ring 402 of the tail end of the piston.
  • the motor drives the gear plate 410 to rotate, and the gear plate 410 drives the piston to linearly slide back and forth in the inflating tube via the eccentric wheel 403 .
  • the transmission rod 405 is sleeved in the ring 402 of the tail end of the piston.
  • An outer diameter of the transmission rod 405 is smaller than an inner diameter of the ring 402 so that the transmission rod 405 has a rotation area so as to reduce the influence on the displacement of the piston's movement path.
  • the transmission rod 405 pushes and pulls the piston to make linear sliding.
  • a frame 401 is arranged in the housing 100 for supporting the transmission assembly.
  • the gear plate 410 is supported by the frame.
  • the communicating pipe 300 includes a first pipe section connected with the inflating tube and a second pipe section connected with the inlet tube 203 , and the first pipe section is connected to the second pipe section.
  • the one-way valve 500 may be arranged in the first pipe section or the second pipe section, depending on actual needs.
  • the tail end of the piston has a hole provided in the central area of the tail end, and the transmission rod is at least partially sleeved in the hole.
  • the two power supply units may be one same power supply unit 31
  • the two power supply protection units are one same power supply protection unit 34 .
  • the controller 800 includes a controlling circuit for controlling the operating state of the air pump.
  • the controlling circuit includes a power supply 31 , a controlling unit 32 , two selecting switches 331 and 332 , a power protection unit 34 , and an inflation speed controlling unit 35 and a power switch 36 .
  • the power supply 31 is used to provide working power for each unit.
  • the power supply 31 may convert the live wire voltage in the power grid into the working voltage required by each circuit after step-down rectification and filtering, or it may be a DC voltage source such as a 6-volt power source.
  • Each of the two selecting switches 331 and 332 has an input terminal connected with the power supply, an output terminal connected with the air pump, a ground terminal, and a controlling terminal connected with the controlling unit 32 .
  • the selecting switch includes a connecting terminal connected to the air pump, and the connecting terminal of the selecting switch is selectively connected to the input terminal or the ground terminal of the selecting switch according to an selecting signal from the controlling unit 32 .
  • the controlling unit 32 is configured to output a selecting signal to the selecting switches 331 and 332 , so that the output terminals of the selecting switches 331 and 332 are selectively connected to the input terminal or connected or disconnected to the ground terminal.
  • a power protection unit 34 is arranged between the power supply 31 and the air pump to protect the power supply 31 .
  • the power supply protection unit 34 is directly connected between the power supply 31 and the air pump.
  • the inflation speed controlling unit 35 controls the inflation speed of the air pump by controlling the time for the current to flow through the air pump. Therefore, the inflation speed controlling unit 35 is provided at a position capable of turning on or off the current path of the air pump.
  • the inflation speed controlling unit 35 is arranged between the ground terminals and the ground terminals of the selecting switches 331 and 332 , or arranged between the power supply unit 31 and the input terminals of the selecting switches 331 and 332 , or arranged between the air pump and the two selecting switches 331 and 332 .
  • the power switch 36 is used to control the on-off of the air pump controlling circuit and the power source, and is equivalent to the main power switch.
  • the power supply 31 includes a power, a first resistor R 1 , a second resistor R 2 , a switch K 1 , and a voltage stabilizing module.
  • the controlling unit 32 includes a D-type flip-flop, a first transistor Q 1 , a second transistor Q 2 , a third resistor R 3 , a fourth resistor R 4 , a fifth resistor R 5 , and a sixth resistor R 6 .
  • the selecting switches 331 and 332 include a first P-channel depletion type field effect transistor, which is defined as a first field effect transistor T 1 , and a second P-channel depletion type field effect transistor which is referred to as a fourth field effect transistor T 4 , a first N-channel depletion type field effect transistor which is defined as a second field effect transistor T 2 , and a second N-channel depletion type field effect transistor which is defined as third field effect transistor T 3 .
  • the first field effect transistor T 1 and the second field effect transistor T 2 constitute a first selecting switch 331 .
  • the third field effect transistor T 3 and the fourth field effect transistor T 4 constitute a second selecting switch 332 .
  • the power protection unit 34 includes a first diode D 1 , a second diode D 2 , a third diode D 3 , a fourth diode D 4 , and a first capacitor C 1 .
  • the inflation speed controlling unit 35 includes a seventh resistor R 7 , an eighth resistor R 8 , a second capacitor C 2 , and a fifth field effect transistor T 5 .
  • the power switch 36 includes a ninth resistor R 9 and a sixth field effect transistor T 6 .
  • the connection relationship of the electronic components in the power supply 31 , the controlling unit 32 , the selecting switches 331 and 332 , the power protection unit 34 , the inflation speed controlling unit 35 , and the power switch 36 may be described below.
  • the power supply 31 is a +6V power, and may also be another DC power supply greater than +6V.
  • the power source is connected to the input terminal Vin of the voltage stabilizing module after passing through the first resistor R 1 .
  • the opposite end of the second resistor R 2 and the switch K 1 and the opposite end of the switch K 1 and the second resistor R 2 are respectively connected to the input terminal Vin and the output terminal Vout of the voltage stabilizing module. That is, the second resistor R 2 and the switch K 1 are connected in series and connected in parallel with the voltage stabilizing module.
  • the second resistor R 2 is a short-circuit resistor.
  • the switch K 1 When the voltage of the power supply is greater than the voltage required by the air pump, the switch K 1 is turned off, and the voltage from the power supply is reduced by the voltage regulator module to provide voltage for the air pump and other electronic components that need to be powered.
  • the switch K 1 When the voltage of the power supply 31 is equal to the voltage required by the air pump, the switch K 1 is turned on, and the voltage from the power supply can directly provide voltage to the air pump and other electronic components that need to be powered via the second resistor R 2 .
  • This means of directly supplying power by the second resistor R 2 can reduce the loss of electric energy by the voltage stabilizing module, thereby improving the efficiency of the power supply.
  • the voltage stabilizing module in this embodiment may use the voltage stabiliser 1117-3.3V of AMS Company.
  • the drains of the first FET T 1 and the second FET T 2 are connected as the output terminal of the first selecting switch 331 , which is connected to the first terminal 1 of the air pump.
  • the drains of the third field effect transistor T 3 and the fourth field effect transistor T 4 are connected as the output end of the second selecting switch 332 , which is connected to the second terminal 2 of the air pump.
  • the sources of the first field effect transistor T 1 and the fourth field effect transistor T 4 are respectively used as the input terminals of the first selecting switch 331 and the second selecting switch 332 , which are connected to the output terminal Vout of the voltage stabilizing module.
  • the sources of the second field effect transistor T 2 and the third field effect transistor T 3 serve as the ground terminals of the first selecting switch 331 and the second selecting switch 332 , respectively, and are connected to the source of the fifth field effect transistor T 5 .
  • the gates of the first field effect transistor T 1 and the second field effect transistor T 2 are connected as the controlling terminal of the first selecting switch 331 .
  • the gates of the third field effect transistor T 3 and the fourth field effect transistor T 4 are connected as the controlling terminal of the second selecting switch 332 .
  • the base of the first transistor Q 1 is connected to the Q output terminal of the D flip-flop through the sixth resistor R 6 .
  • the collector of the first transistor Q 1 is connected to the grids of the third field effect transistor T 3 and the fourth field effect transistor T 4 .
  • the fifth resistor R 5 is connected to the output terminal Vout of the voltage stabilizing module.
  • the emitter of the first transistor Q 1 is connected to the housing of the electronic blood pressure monitor.
  • the base of the second transistor Q 2 is connected to the output terminal Q of the D flip-flop through the fourth resistor R 4 .
  • the collector of the second transistor Q 2 is connected to the gates of the first field effect transistor T 1 and the second field effect transistor T 2 .
  • the third resistor R 3 is connected to the output terminal Vout of the voltage stabilizing module, and the emitter of the second transistor Q 2 is electrically connected to the housing 100 .
  • the cathode of the first diode D 1 and the anode of the second diode D 2 are connected to the first terminal 1 of the air pump.
  • the cathode of the third diode D 3 and the anode of the fourth diode D 4 are connected to the second terminal 2 of the air pump.
  • the anodes of the first diode D 1 and the third diode D 3 are electrically connected to the housing.
  • the cathodes of the second diode D 2 and the fourth diode D 4 are connected to the output terminal Vout of the voltage stabilizing module. At the same time, it is electrically connected to the casing through the first capacitor C 1 .
  • the gate of the fifth field effect transistor T 5 is connected to the TXAO output terminal (not shown in figure) of the first microcontroller through the seventh resistor R 7 and the eighth resistor R 8 .
  • the speed controlling signal unit in the first microcontroller outputs a speed controlling signal.
  • the source of the fifth field effect transistor T 5 is connected to the source of the third field effect transistor Q 3
  • the drain of the fifth field effect transistor T 5 is connected to the source of the sixth field effect transistor T 6 .
  • One end of the second capacitor C 2 is connected to one end of the seventh resistor R 7 and the eighth resistor R 8
  • the other end of the second capacitor C 2 is connected to the source of the fifth field effect transistor T 5 .
  • the first microcontroller outputs a PWM modulation wave to the fifth FET T 5 .
  • the second capacitor C 2 removes a noise signal from the first microcontroller, and avoid affecting the on or off time of the fifth FET T 5 due to noise in the circuit, so as to better control the inflation speed of the air pump.
  • the gate of the sixth field effect transistor T 6 in the power switch 36 is connected to the PUMPC output terminal (not shown in the figure) of the first microcontroller through a ninth resistor R 9 .
  • the power controlling unit in the first microcontroller outputs a signal to turn on or off the power.
  • the source of the sixth field effect transistor T 6 is connected to the drain of the fifth field effect transistor T 5 , and the drain of the sixth field effect transistor T 6 is connected to the housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US17/447,837 2021-08-30 2021-09-16 Fast inflating air pump Pending US20220003225A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202122061944.8 2021-08-30
CN202122061944.8U CN216278329U (zh) 2021-08-30 2021-08-30 快速充气的充气泵

Publications (1)

Publication Number Publication Date
US20220003225A1 true US20220003225A1 (en) 2022-01-06

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ID=79166686

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/447,837 Pending US20220003225A1 (en) 2021-08-30 2021-09-16 Fast inflating air pump

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US (1) US20220003225A1 (zh)
CN (1) CN216278329U (zh)

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Publication number Publication date
CN216278329U (zh) 2022-04-12

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