5159results about How to "Prevent inflow" patented technology

An inhalation nebulizer includes an aerosol generator that has a diaphragm vibrated by a vibration generator. The inhalation nebulizer includes a liquid storage container that is in fluid contact with the diaphragm. A liquid contained in the storage container is atomized into a mixing chamber through openings in the diaphragm and can subsequently be inhaled by a patient.

A maximum value selection unit (50) receives battery voltage values (Vb1, Vb2) and outputs the maximum value thereof to a lower limit value limiting unit (54). A maximum value selection unit (52) receives required voltage values (Vm1*, Vm2*) and outputs the maximum value thereof to the lower limit value limiting unit (54). The lower limit value limiting unit (54) outputs a voltage reference value (Vh*) by limiting the value so as not to fall below an output value of the maximum value selection unit (50). Switching commands (PWC1, PWC2) are generated based on a control computation using a combination of a voltage feedback control element and a voltage feedforward element, and a control computation using a combination of a current feedback control element and a voltage feedforward element, respectively.

The invention discloses a water spray-resistant electronic cigarette which comprises an atomizer and a battery pack which are detachably connected with each other. The atomizer comprises a shell and an atomizing device; a liquid storage cavity and a liquid absorption cavity are formed in the atomizer; a smoke tube and an air intake duct are arranged in the shell; an air inlet cavity is formed in the atomizing device and communicated with the air intake duct; an overhead liquid guide strip is arranged in an atomizing chamber; a heating wire is wound on the middle section of the liquid guide strip; two ends of the liquid guide strip stretch into the liquid absorption cavity for absorption and conduct tobacco juice to the heating wire for heating and atomizing; first positive and negative electrodes isolated from the air inlet cavity are arranged at the bottom of the atomizing device and are respectively pressed against second positive and negative electrodes in a socket of the battery pack so as to be electrically connected. The water spray-resistant electronic cigarette disclosed by the invention has the beneficial effects that water spray in the smoke can be condensed and collected in the water inlet cavity when the smoke flows backwards, the water spray is prevented from flowing into the socket of the battery pack through the air inlet duct and a gap between the first positive and negative electrodes, and the conditions that short circuit between the electrodes is caused and the water spray enters the battery pack to corrode the circuit are avoided, so that failure of the electronic cigarette is avoided.

Drilling fluid additives are designed to increase the density of drilling fluids while minimizing the increase in the resistance to flow of the drilling fluid. In particular, barite particles are added to the drilling fluid as a weight material where the barite particles include at least 85% by weight particles less than 75 microns and greater than 6 microns in equivalent spherical diameter.