Sprinkler bulb
AssigneeMarioff Corporation Oy
InventorsMikolaj Jakub Sadek, Nazar Krutskevych, Wojciech Dominik Zimny
Life of this patent
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Abstract
The invention relates to a sprinkler bulb comprising a sealed frangible housing 110, and a circuit device 120 within the housing, wherein the circuit device comprises a capacitor 150 arranged to be used as a pressure sensor. The invention also relates to a method of measuring pressure inside a sprinkler bulb using a capacitor 150 of the circuit device 120 within a housing 110 of the bulb as a pressure sensor.
Claims15
A sprinkler bulb comprising a sealed frangible housing (110), and a circuit device (120) sealed within the housing and without external wired connections, wherein the circuit device comprises:
- a capacitor (150) within the housing (110) arranged to be used as a pressure sensor to detect pressure changes within the housing (110);
- a heating element operable to heat fluid within the housing of the sprinkler bulb, and
- a control unit configured to monitor changes in the capacitance of the capacitor and thereby use the capacitor as a pressure sensor.
A method of measuring pressure inside a sprinkler bulb comprising a sealed frangible housing (110), and a circuit device (120) sealed within the housing and without external wired connections, the method comprising using a capacitor (150) of the circuit device within the housing (110) as a pressure sensor to detect pressure changes within the housing (110);
- and
- heating fluid (130) in the housing (110), and determining that the bulb is in working order if pressure in the housing (110) reaches a predetermined threshold, and determining that the bulb is not in working order if pressure in the housing (110) does not reach the predetermined threshold.
A sprinkler bulb comprising a sealed frangible housing, and a circuit device within the housing, wherein the circuit device comprises a capacitor arranged to be used as a pressure sensor,
- wherein the capacitor is a first capacitor, wherein the circuit device comprises a wireless unit for wirelessly receiving power and/or signals from outside the housing, and wherein the wireless unit comprises a second capacitor, and
- wherein the first capacitor has a greater surface area than the second capacitor.
Dependencies are inferred from the claim text.