摘要:
A heat exchanger comprises at least one tube or plate pair defining a fluid flow passage which is reduced in height across a portion of its width. A turbulizer comprising a plurality of rows of convolutions is received inside the fluid flow passage in either the low pressure drop or high pressure drop orientation. The turbulizer includes convolutions of reduced height in order to at least partially fill the reduced-height portions of the fluid flow passage and thereby reduce bypass flow. In some preferred embodiments of the invention, heat exchanger tubes or plate pairs define fluid flow passages which are reduced in height along their edges, and the turbulizer is similarly reduced in height along its edges.
摘要:
A pressure sensor includes a base substrate silicon fusion bonded to a cap substrate with a chamber disposed between the base substrate and the cap substrate. Each of the base substrate and the cap substrate include silicon. The base substrate includes walls defining a cavity and a diaphragm portion positioned over the cavity, wherein the cavity is open to an environment to be sensed. The chamber is hermetically sealed from the environment.
摘要:
A heat exchanger comprises at least one tube or plate pair defining a fluid flow passage which is reduced in height across a portion of its width. A turbulizer comprising a plurality of rows of convolutions is received inside the fluid flow passage in either the low pressure drop or high pressure drop orientation. The turbulizer includes convolutions of reduced height in order to at least partially fill the reduced-height portions of the fluid flow passage and thereby reduce bypass flow. In some preferred embodiments of the invention, heat exchanger tubes or plate pairs define fluid flow passages which are reduced in height along their edges, and the turbulizer is similarly reduced in height along its edges.
摘要:
A pressure sensor includes a base substrate silicon fusion bonded to a cap substrate with a chamber disposed between the base substrate and the cap substrate. Each of the base substrate and the cap substrate include silicon. The base substrate includes walls defining a cavity and a diaphragm portion positioned over the cavity, wherein the cavity is open to an environment to be sensed. The chamber is hermetically sealed from the environment.
摘要:
A device comprising an array of sensors and a multiplicity of bus lines, each sensor being electrically connected to a respective bus line and comprising a respective multiplicity of groups of micromachined sensor cells, the sensor cell groups of a particular sensor being electrically coupled to each other via the bus line to which that sensor is connected, each sensor cell group comprising a respective multiplicity of micromachined sensor cells that are electrically interconnected to each other and not switchably disconnectable from each other, the device further comprising means for isolating any one of the sensor cell groups from its associated bus line and in response to any one of the micromachined sensor cells of that sensor cell group being short-circuited to ground. In one implementation, the isolating means comprise a multiplicity of fuses. In another implementation, the isolating means comprise a multiplicity of short circuit protection modules, each module comprising a current sensor circuit and an electrical isolation switch.
摘要:
A heat exchanger comprises at least one tube or plate pair defining a fluid flow passage which is reduced in height across a portion of its width. A turbulizer comprising a plurality of rows of convolutions is received inside the fluid flow passage in either the low pressure drop or high pressure drop orientation. The turbulizer includes convolutions of reduced height in order to at least partially fill the reduced-height portions of the fluid flow passage and thereby reduce bypass flow. In some preferred embodiments of the invention, heat exchanger tubes or plate pairs define fluid flow passages which are reduced in height along their edges, and the turbulizer is similarly reduced in height along its edges.
摘要:
A method of making a capacitive micromachined ultrasound transducer cell is provided. The method includes providing a carrier substrate, where the carrier substrate comprises glass. The step of providing the glass substrate may include forming vias in the glass substrate. Further, the method includes providing a membrane such that at least one of the carrier substrate, or the membrane comprises support posts, where the support posts are configured to define a cavity depth. The method further includes bonding the membrane to the carrier substrate by using the support posts, where the carrier substrate, the membrane and the support posts define an acoustic cavity.