In systems and methods for adjusting the firmness of a mattress assembly and/or modulating the pressure in a mattress assembly, a mattress assembly includes: a two-dimensional array of bladders; at least one pump that is in fluid communication with the bladders to provide air and/or fluid to the bladders: multiple valves that are interposed between the pump and the bladders to control the flow of air and/or fluid to or from the bladders; a pressure sensor operably connected to one or more of the bladders; and a controller in communication with the pump, the valves, and the pressure sensors. The controller is configured to selectively actuate the pump and one or more of the valves, while receiving feedback from the pressure sensors, in order to adjust the firmness of the mattress assembly and/or modulate the pressure in the mattress assembly.

The present invention is a fluid distribution system comprising connected conduits (e.g., lines) wherein fluid flows, such as pipes within a building. The lines may be configured to: (i) include multiple lines that connect at intersections (some of the intersections will be identified as nodes); and (ii) incorporate node units associated with line pressure loss simulation assemblies (LLSAs). Activities of a node unit incorporating a LLSA can result in alterations in fluid pressure, such as by a loop control process to reposition balancing valves or other valves of one or more LLSAs, and/or by alteration of the speed of the system pump. These activities adjust fluid pressure to cause the system to produce a balanced and high efficiency energy transfer (e.g., heating or cooling), and do not involve or require any identification or use of any specific, fixed or absolute pressure value. They function based on an operation locus (for a node unit) and/or an operation locus range (for node unit groupings) to adjust the fluid pressure.

A medicine powder cleaning apparatus includes a pressure sensor, a positive pump, and a control module. The control module includes control unit and power supply unit. The pressure sensor detects a first pressing force to obtain a first detection value. The pressure sensor detects a first pressing force in a first tube to obtain a first detection value. The control unit is configured to obtain the first difference value, and determine whether within a reference range. The power supply unit supplies power to the positive pump when the first difference value is not within the reference range. The positive pump is configured to blow out the medicine powder in the first tube after being supplied with power by the power supply unit. A medicine powder cleaning method is also provided.

Methods and apparatus for controlling gas flow to a process chamber are disclosed herein. In some embodiments, a processing system includes a first process chamber having a first gas input; a first gas break disposed upstream of the first gas input; a first adjustable valve disposed upstream of the first gas break; and a first isolation valve disposed upstream of the first adjustable valve. The processing system may further include a second process chamber having a second gas input; a second gas break disposed upstream of the second gas input; a second adjustable valve disposed upstream of the second gas break; and a second isolation valve disposed upstream of the second adjustable valve. A shared gas source may be disposed upstream of the first isolation valve and the second isolation valve to provide one or more gases to the first process chamber and to the second process chamber.

Examples are disclosed that relate to an apparatus for controlling pressure or flow in a fluidic system. The apparatus comprises a main inlet/outlet and a uni-directional pumping device configured to pump gas from an inlet of the pumping device to an outlet of the pumping device. The apparatus further comprises a valves array and a control unit. The control unit is configured to set the valves array into at least two states. In a first state, a first gas source is fluidically connected to the inlet of the pumping device, and the outlet of the pumping device is fluidically connected to the main inlet/outlet. In a second state, the main inlet/outlet is fluidically connected to the inlet of the pumping device, and the outlet of the pumping device is fluidically connected to a second gas source.

A pressurization control system configured to regulate air pressure with a space includes an air supply source fluidly coupled to a damper, a room controller configured to provide a control signal to the damper. The room controller includes a flow controller configured to generate a flow feedback signal, and a pressure controller configured to generate a pressure feedback signal, wherein the room controller is configured to receive flow and pressure feedback signals and generate the control signal based on one or more of the received flow and pressure feedback signals.

The present disclosure provides for a control system for a flow therapy apparatus. The control system can control delivery of a fraction of delivered oxygen (FdO2) to a patient. The control system can maintain the FdO2 at a target level during a therapy session. The control system can automatically control an oxygen inlet valve in order to control the flow of oxygen to the patient.

The present disclosure relates to a method and system for automatic control of a vacuum pump. The method involves: starting the vacuum pump and obtaining system parameters; starting the motor and opening the solenoid valve; collecting the current vacuum value and motor start time; establishing a vacuum value model; comparing the current and predicted vacuum values; establishing a time parameter model; comparing the current vacuum value and time with set values; and turning off the motor and solenoid valve. This system enables remote and automatic control through solenoid valves and control circuits, saving energy, reducing labor costs, and improving efficiency.

A liquid supply system includes: a tank that stores a processing liquid; a circulation line that returns the processing liquid sent from the tank, to the tank; a pump that forms a circulation flow of the processing liquid in the circulation line; a filter provided on a downstream side of the pump in the circulation line; a back pressure valve provided on a downstream side of the filter in the circulation line; and a controller that controls each unit. When stopping an operation of the pump, the controller controls the pump and the back pressure valve such that a differential pressure between an upstream side and a downstream side of the filter becomes equal to or less than a predetermined threshold value, during a period from when a discharge pressure of the pump starts to decrease until the operation of the pump is stopped.

A coolant flow rate control method, configured to be applied to a plurality of servers and a fluid driver in fluid communication with the plurality of servers. The coolant flow rate control method includes setting a predetermined pressure difference between inlets and outlets of the plurality of servers based on power data of the plurality of servers and adjusting a duty ratio of the fluid driver for maintaining an actual pressure difference between the inlets and the outlets of the plurality of servers to match the predetermined pressure difference.