摘要:
A thermal mass flow controller includes a sensor assembly, a valve assembly, and mass flow controller housing. A thermal ground limits the conductive thermal path between the mass flow controller housing and the sensor assembly and, due to the limited cross-section of the thermal ground, substantially eliminates externally imposed thermal gradients within the sensor assembly. The controller also includes a thermally dissipative element that conducts thermal energy along a path from the valve assembly away from the sensor assembly.
摘要:
The present invention provides a high-performance mass flow controller which is compact and lightweight, which has a flow path having a simple structure and which does not have dead space in which a fluid is likely to stagnate and cause the problem of contamination. A cylindrical valve conduit having a hollow structure, a yoke and a sensor conduit are connected in tandem. A fluid inlet portion is connected to an end of the valve conduit and a fluid outlet portion is connected to an end of the sensor conduit. A solenoid valve is provided on a side of the fluid inlet portion and a thermal mass flowmeter is provided on a side of the fluid outlet portion. In the valve conduit, a cylindrical plunger providing a movable portion of the solenoid valve and a valve portion of which a degree of opening is adjusted by moving the plunger are provided on a side of the fluid inlet portion. A bypass for generating a laminar flow is disposed in the sensor conduit so as to effect one-way flow of a fluid.
摘要:
A thermal mass flow controller includes a sensor assembly and mass flow controller housing. A thermal ground limits the conductive thermal path between the mass flow controller housing and the sensor assembly and, due to the limited cross-section of the thermal ground, substantially eliminates externally imposed thermal gradients within the sensor assembly.
摘要:
The present invention provides an ink jet printer head having a pressure chamber to jet ink by deformation of a piezoelectric member provided in the pressure chamber. The piezoelectric member has an electrode for applying electricity to the piezoelectric member. The present invention provides an insulation layer on the electrode formed by vapor deposition method, which has high adhesion and throwing power. Thus, a plurality of electrodes can be covered by the insulation layer even though these electrodes are not provided on the same plane. Accordingly, the ink jet printer head can be used for a long time in steady without deterioration of the piezoelectric member and the ink in case of using conductive ink like water ink.
摘要:
There is provided a flow rate sensor comprising: a pair of heating resistors operable to heat a sensor tube; a temperature sensor operable to control respective temperatures of the heating resistors; and a case operable to hold the heating resistors and the temperature sensor. The flow rate sensor is adapted to detect a flow rate of a fluid flowing in the sensor tube based on variations of voltages applied to the heating resistors, wherein the variations occur according to the flow rate of the fluid. The flow rate sensor further comprises a voltage applying device operable to arbitrarily set an increase in temperature of each of the heating resistors. The sensor tube has opposite ends thereof thermally connected to the case. The temperature sensor is positioned to be equidistant from the opposite ends of the sensor.
摘要:
When a control section 8 of a mobile communication device detects a voltage drop of a battery during wireless data communication through packet transmission, the control section temporarily stops transmission in the state where reception is maintained. The mobile communication device receives power from a data terminal connected to the mobile communication device through a modem card. When an exchange of batteries is ended and a battery voltage is recovered, transmission is resumed. Transmission data during a period when the transmission is stopped, is stored in a RAM in the modem card.
摘要:
An actuator utilizing the pressure of a gas is used to operate a diaphragm-operated control valve. An operating force generated by the actuator is varied by feeding and discharging a gas such as N2 through a narrow metallic tube. This is conducted by remote control, by means of electromagnetic valves provided in an environment at room temperature. The state of the control valve is monitored by a flow rate sensor which detects an actual flow rate of a fluid being controlled. Based on a signal representative of the detected actual flow rate, the electromagnetic valves for the actuator are controlled so that the fluid always flows at a desired flow rate. The gas such as N2 is heated by a heat exchanger in a high-temperature atmosphere in the vicinity of the actuator, to thereby prevent cooling of the fluid being controlled.
摘要:
A combustion promotion auxiliary device can increase the fuel consumption rate by improving the fuel combustion efficiency for a variety of internal combustion engines including those for automobiles and motorbikes, and can prevent air pollution. The combustion promotion auxiliary device includes a combustion promotion auxiliary container which can be mounted to a fuel pipe for an internal combustion engine and a combustion promotion medium consisting of soft porous ancient marine humus housed in the combustion promotion auxiliary container.