Abstract:
A water purification apparatus includes a main body having an accommodation chamber inside and a plate on a top side thereof, a lid pivotally mounted on the main body and closable on the main body, a holder mounted with the plate of main body and defining with the plate of the main body a distance, a top cover pivotally mounted with the holder and having a retaining portion, an inlet and an outlet opposite to the inlet, and a housing having a jamming portion detachably engageable with the retaining portion of the top cover, a first water filler hole in communication with the inlet of the top cover and a second water filler hole in communication with the outlet of the top cover. The water purification apparatus has the advantages of being convenient to exchange a filter.
Abstract:
A water purification apparatus includes a main body having an accommodation chamber inside and a plate on a top side thereof, a lid pivotally mounted on the main body and closable on the main body, a holder mounted with the plate of main body and defining with the plate of the main body a distance, a top cover pivotally mounted with the holder and having a retaining portion, an inlet and an outlet opposite to the inlet, and a housing having a jamming portion detachably engageable with the retaining portion of the top cover, a first water filler hole in communication with the inlet of the top cover and a second water filler hole in communication with the outlet of the top cover. The water purification apparatus has the advantages of being convenient to exchange a filter.
Abstract:
A control device for a water source filtering system includes a water filtering system made up of a first cartridge of sediment pre-filter, a second cartridge of activated carbon filter to remove toxic chemicals, a third cartridge of refined pre-filter, a fourth cartridge of multi-layer reverse osmosis membrane, and a fifth cartridge of activated carbon post filter for sequential filtration of water source wherein the water filtering system works in cooperation with a control device quipped with a control panel having a series of indicator lights sequentially arranged at one side thereon to be respectively matched with the first-through-fifth cartridges thereby. The control panel thereof also has a display screen disposed at the upper section of the other side thereof, a pair of good and poor water quality indicator lights disposed at the middle section of the other side thereof, and a pair of setting and resetting/increasing keys disposed at the lower section of the other side thereof. Therefore, the control device can accurately record the replacement date of each cartridge from the first to the fifth and precisely send out light or alarm signals for speedy and correct replacement of the expired cartridges thereof, effectively reminding a user to regularly replace the worn-out cartridges so that, over long time of use, the water filtering system thereof can still efficiently filter the contaminants in water source and provide pure drinking water thereby.
Abstract:
An error assessment method for a test stimulus signal of an analog to digital converter is disclosed. The method provides random uniform-distribution test signals for an analog to digital converter (ADC), derives the piecewise linearity relationship between the input signals and the output signals of the ADC and thus develops an error assessment method for a test stimulus signal of the ADC. The method is able to reduce the computational complexity but still accurate and effective, and thereby provides correct information of the test stimulus signals for testing the ADC to improve its correctness.
Abstract:
The present invention relates to a novel styrene-anhydride copolymer containing amido group, which comprises the following repeating units (I) and (II): wherein R represents a residue of (meth)acrylate monomer containing hydroxyl group; R1 and R2 are the same or different and each represents a C1-6 alkyl group, or R1 and R2 are taken together with the nitrogen atom to which they attach to form a 5- to 6-member heterocyclic group containing nitrogen. The present invention also relates to process for producing the above copolymer and to the use of the copolymer as a photo resist in an alkaline soluble development of an irradiative reaction and as a solder resistant photo resist in printed circuit boards.