Patent ID: 8850884
Filing Date: 2014-10-07
Classification: G01F,H01M,Y02E

Abstract:
1. A liquid tank comprising: a liquid container section storing liquid; and a detector detecting volume of the liquid stored in the liquid container section, the detector including: a first board having, on a front face thereof, a pair of detection electrodes for detecting a stray capacitance, the pair of detection electrodes directly or indirectly contacting with the liquid inside the liquid container section; a second board having a shielding electrode and arranged on a back face side of the first board; and a liquid pump drawing up the liquid stored inside the liquid container section, wherein the detector includes, on a back side of the first and second boards, a printed board with a volume measurement circuit mounted thereon, the printed board being configured to measure the stray capacitance between the pair of detection electrodes, and wherein the volume measurement circuit includes