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Liquid ejection apparatus and liquid ejection method

A liquid spray device and liquid technology, which can be applied to other medical devices, printing, inhalers, etc., can solve problems such as waste of liquid, and achieve the effect of reducing liquid loss

Inactive Publication Date: 2012-02-01
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In addition, another problem was found that the liquid injection device of the pressurized system wastes a certain amount of liquid when ejecting droplets
This is because, during the pressurization period, the liquid overflows from the ejection port, so it cannot be avoided according to the principle of the pressurization system

Method used

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  • Liquid ejection apparatus and liquid ejection method
  • Liquid ejection apparatus and liquid ejection method
  • Liquid ejection apparatus and liquid ejection method

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Experimental program
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Embodiment Construction

[0031] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] Figure 1A with1B The main part of the liquid ejecting device according to the first embodiment is shown. The liquid ejecting apparatus has: an ejection port 1; a heater 2 serving as a liquid removing unit for controlling the timing of ejecting liquid droplets from the ejection port 1; a liquid chamber wall 4 constituting a liquid chamber 3 for containing liquid; And the orifice plate 5, which forms the upper wall of the liquid chamber 3.

[0033] The size of the ejection port 1 formed in the orifice plate 5 is set so as to form liquid droplets of a desired size. In the ejection head of the pressurizing system, the diameter of the liquid droplet formed by ejection is about twice the diameter of the ejection port. In the application of the inhaler, the diameter of the liquid droplet is required to be 10 to 1 μm, so the diameter of the eje...

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PUM

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Abstract

The present invention relates to a liquid ejection apparatus comprising a liquid chamber (3) for accommodating a liquid to be supplied from a liquid tank, an ejection port (1) for ejecting droplets of the liquid by applying a pressure to the liquid in the liquid chamber, a pressure application unit for applying the pressure to the liquid in the liquid chamber a liquid-holding structure (7) for holding the liquid on the atmosphere side of the ejection port so as to cover the ejection port with the liquid; and a liquid-removing unit (2) for removing the liquid held on the atmosphere side of the ejection port. The liquid-removing unit controls a timing of ejecting the droplets from the ejection port.

Description

technical field [0001] The present invention relates to a liquid spraying device and liquid spraying method for converting a liquid preparation or the like into minute liquid droplets and spraying the liquid droplets. Background technique [0002] As a method of administering medicine to a patient, the medicine that has been dispersed in a solution (medicine liquid) is converted into minute liquid droplets and the patient inhales the minute liquid droplets using an inhaler. Such droplets need to reach the alveoli in particular in order to deliver the drug to the blood vessels. In order for such droplets to reach the alveoli, the diameter of the droplets must be at most 10 μm, preferably about 3 μm. On the other hand, patients need to inhale a large number of liquid droplets in order to get the desired drug effect. Therefore, an inhaler is required to generate a large number of small liquid droplets to be ejected for delivery of medicinal liquid to blood vessels by inhalati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/03A61M15/00
CPCA61M11/006A61M11/041B41J2/03A61M2205/8206A61M11/007A61M11/00A61M2205/3331A61M15/025A61M11/042A61M11/02A61M2205/103
Inventor 福本能之
Owner CANON KK