Optimized liquid droplet spray device for an inhaler suitable for respiratory therapies

A method of dispensing an inhalable atomized liquid with a liquid droplet spray device comprising:

• a housing formed of a superposition of a first substrate and a second substrate;
• a space within the housing and enclosed by said first and second substrates for containing the liquid substance;
• a supply device connected to supply said liquid substance to said space;
• a vibrating device disposed to apply a frequency of vibration to said liquid substance thereby generating said liquid droplet spray;
• and
• an outlet arrangement disposed to eject said liquid droplet spray when said liquid substance undergoes said vibration, said outlet arrangement comprising at least one cavity arranged in one of said substrates and forming part of said space of said housing;
• wherein said outlet is located in said first substrate and said vibrating device is arranged on said second substrate, said outlet arrangement further comprising one or more output nozzles and at least one output channel connecting said cavity to said output nozzles;
• said method comprising the steps of:
• (a) supplying said liquid substance to said space;
• (b) creating a standing wave pattern within said space, such that said nozzles are superposed on vibration mode peaks of said standing wave pattern;
• and
• (c) applying a frequency of vibration to said liquid substance sufficient to generate said liquid droplet spray, and eject said spray from said output nozzle.

A method of generating an atomized spray for inhalation comprising the steps of:

• providing a space having one or more output nozzles;
• supplying liquid to said space at a low pressure;
• creating a standing wave pattern within said space, such that the output nozzles are superposed on vibration mode peaks of said standing wave pattern;
• and
• applying a frequency of vibration to said liquid sufficient to generate said atomized spray and eject said spray through the output nozzle.