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fluid pump

A fluid pump and fluid technology, applied in pumps, pump control, flow control, etc., can solve the problems of increasing the complexity and cost of microfluidic equipment

Active Publication Date: 2019-08-27
FUNAI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process requires multiple digital inputs that must be updated every ignition cycle
While this level of control may be necessary for printing applications, it adds complexity and cost to these microfluidic devices, and for at least these reasons it is not optimal for all applications

Method used

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Examples

Experimental program
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Embodiment Construction

[0020] Referring now to the accompanying drawings, it is shown figure 1 , figure 1 is a schematic diagram representing a microfluidic pump 100 according to an embodiment of the present disclosure. The pump 100 generally includes a fluid 102 and a fluid supply 104 for storing and supplying the fluid. A fluid supply 104 supplies fluid 102 to an ignition chamber 106 . The ignition chamber 106 includes a nozzle 108 and an ignition mechanism 110 . The ignition mechanism 110 is configured to inject the fluid 102 out of the ignition chamber 106 through a nozzle during the ignition sequence. One example of ignition mechanism 110 is a heater array used in inkjet printing applications. Typically, approximately the same volume of fluid is injected during each firing sequence. Thus, the flow rate of the pump 100 varies according to how often these injections occur without changing the amount of fluid injected during each firing sequence.

[0021] refer to figure 2 , the basic igni...

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PUM

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Abstract

A microfluidic pump (100) having an ignition mechanism (110) for ejecting fluid out of an ignition chamber (106) during an ignition sequence comprising an ignition step followed by a wait step. The power circuit (112) activates and deactivates the ignition mechanism (110) in response to a control signal that controls the timing of each step and is provided by a logic circuit (114). The control signal controls the ignition step and is dependent on a predetermined fixed frequency signal provided by a first oscillator (116). The control signal controls the waiting step and is dependent on a variable frequency signal provided by a second oscillator (118). The first input provides a variable input signal to a second oscillator (118). A second oscillator (118) varies a variable frequency signal in response to a variable input signal. The logic circuit (114) also varies the control signal based on the variable frequency signal to vary the length of the waiting step.

Description

technical field [0001] The present invention relates to the field of microfluidic pumps. More specifically, the present invention relates to a microfluidic pump that dispenses fluid based on the flow rate of a variable analog input. Background technique [0002] Microfluidic devices are used to manipulate and precisely dispense defined microscopic volumes of liquids within microscale structures. For example, a laboratory-based titration system may include a microfluidic pump programmed to dispense a fixed volume of reagent onto a well plate. In this case, the amount of liquid to be dispensed and the time required for the dispense may be fixed to define the fluid flow of the system. [0003] Microfluidic pumps can also be used to dispense respiratory medications to patients. In this case, the way the patient uses the pump appears as a non-constant external variable. The amount of drug to be administered to a patient at any given time may not be constant, and for this reas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06A24F47/00B81B3/00A24F40/10A24F40/48A24F40/50
CPCB41J2/175F04B43/043B41J2/17596F04B19/006F04B49/065A24F40/10A24F40/50A24F40/48G05D7/0676F04D33/00
Inventor J·G·艾德伦
Owner FUNAI ELECTRIC CO LTD