An active cooling system and method for using the active cooling system are described. The active cooling system includes a cooling element having a first side and a second side. The first side of the cooling element is distal to a heat-generating structure and in communication with a fluid. The second side of the cooling element is proximal to the heat-generating structure. The cooling element is configured to direct the fluid using a vibrational motion from the first side of the cooling element to the second side such that the fluid moves in a direction that is incident on a surface of the heat-generating structure at a substantially perpendicular angle and then is deflected to move along the surface of the heat-generating structure to extract heat from the heat-generating structure.

A pump device includes a piezoelectric pump, a piezoelectric pump, and a driving circuit. The piezoelectric pump is driven at a first frequency when singly driven. The piezoelectric pump is driven at a second frequency when singly driven. The driving circuit drives the piezoelectric pump and the piezoelectric pump at the same driving frequency.

Provided are a fluid control device capable of operating a piezoelectric pump even in a case where a low discharge pressure or a slow pressurization speed is required and a sphygmomanometer including the fluid control device. A fluid control device includes a piezoelectric pump that includes a piezoelectric element, a self-excited circuit that performs, upon application of a driving power source voltage thereto, self-excited oscillation to drive the piezoelectric element, a switch that interrupts the driving power source voltage for the self-excited circuit, and a control circuit that changes an on duty ratio of the self-excited circuit by switching between states of the switch at a predetermined switching frequency and a predetermined on duty ratio.

A pump, especially for delivering liquid fuel for a vehicle heater, includes a pump body (12) providing a pump chamber (14). The pump body (12) is made with magnetic shape memory material at least in some areas. The pump further includes a field-generating arrangement (44) for generating a magnetic field (M). The magnetic shape memory material of the pump body (12) can be brought from an initial state into a deformed state by generating a magnetic field (M) by the field-generating arrangement (44). A pump chamber volume in the deformed state differs from the pump chamber volume present in the initial state.

The technical solution relates to devices for pumping fluid media and can be used in industry, transport and the home for pumping liquids and other incompressible and compressible fluid media as well as for extracting oil from wells. The pump assembly with an electric drive consists of a housing, an electric drive armature situated inside the housing, and a displacer situated in the fore end of the housing, wherein the electric drive armature and the displacer are connected to one another. The displacer is in the form of a piston. The electric drive armature consists of the following, connected in series: an electric drive rear spacing block, an electric drive motion block capable of moving relative to the housing in the direction of a change in the length of the motion block, and an electric drive fore spacing block. Unlike the closest prior art, at least one electric drive spacing block is in the form of a magnetostrictive spacing block, and/or the electric drive motion block is in the form of a magnetostrictive motion block. The invention is intended to solve the technical problem of extending the range of existing technical equipment. The positive result of realizing the invention is that of achieving this purpose.

Micropump (10) including a support structure (14), a pump tube (16), and an actuation system (18) comprising one or more pump chamber actuators (28), the pump tube comprising a pump chamber portion (24) defining therein a pump chamber (26), an inlet portion (20) for inflow of fluid into the pump chamber, and an outlet portion (22) for outflow of fluid from the pump chamber. The inlet, outlet and pump chamber portions form part of a continuous section of tube made of a supple material. The one or more pump chamber actuators are configured to bias against the pump chamber portion to expel liquid contained in the pump chamber via the outlet portion, respectively to bias away from the pump chamber portion to allow liquid to enter the pump chamber via the inlet portion. The pump chamber portion has a cross-sectional area Ap in an expanded state that is larger than a cross-sectional area Ai of the pump tube at the inlet and outlet portions.

A driving circuit for a piezoelectrically actuated pump includes a boost converter, a control circuit and a voltage switch circuit. The boost converter outputs a constant voltage. The control circuit includes a voltage-division circuit, a comparator and a frequency adjustment circuit. The constant voltage is divided by the voltage-division circuit into a first voltage and a second voltage. The comparator compares first voltage with second voltage so as to output a positive voltage or a negative voltage. The voltage switch circuit receives and feedbacks positive voltage or negative voltage to the piezoelectric actuator load. The control circuit and the voltage switch circuit form a resonant circuit to control the piezoelectric actuator load according to the variety of minor voltage outputted form the piezoelectric actuator load. The frequency adjustment circuit detects and adjusts the variety of the minor voltage automatically so as to adjust operating frequency of the piezoelectric actuator load.

Provided is a piezoelectric driving device for a motor including: a vibrating plate which includes a fixed portion and a vibrator portion in which a piezoelectric element is provided and which is supported by the fixed portion; and a contact portion which comes into contact with a driven body and transmits motion of the vibrating plate to the driven body, in which the fixed portion, the vibrator portion, and the contact portion are provided along an X direction in this order, when seen in a Y direction, when two directions parallel to a main surface of the vibrating plate and orthogonal to each other are set as the X direction and the Y direction and a direction orthogonal to the main surface of the vibrating plate is set as a Z direction.

An active cooling system and method for using the active cooling system are described. The active cooling system includes a cooling element having a first side and a second side. The first side of the cooling element is distal to a heat-generating structure and in communication with a fluid. The second side of the cooling element is proximal to the heat-generating structure. The cooling element is configured to direct the fluid using a vibrational motion from the first side of the cooling element to the second side such that the fluid moves in a direction that is incident on a surface of the heat-generating structure at a substantially perpendicular angle and then is deflected to move along the surface of the heat-generating structure to extract heat from the heat-generating structure.

A device includes a main body and at least one actuating and sensing module. A length of the main body is 5070 mm. A width of the main body is 2530 mm. A height of the main body is 915 mm. The actuating and sensing module is disposed in the main body. The actuating and sensing module includes a carrier, at least one sensor, at least one actuating device, a driving and transmitting controller and a battery. The sensor, the actuating device, the driving and transmitting controller and the battery are disposed on the carrier. The actuating device is disposed on one side of the sensor. The actuating device includes a guiding channel. The actuating device is enabled to transport fluid to flow toward the sensor through the guiding channel so as to make the fluid measured by the sensor.