1587 results about "Liquid temperature" patented technology

A method and apparatus for pressure infusion and temperature control of infused liquids includes a receptacle for receiving a liquid-filled bag containing intravenous solution or other liquid and an inflatable pressure device. The inflatable pressure device is disposed within a pressure device bag and is positioned proximate the liquid-filled bag in the receptacle. The inflatable pressure device expands within the pressure device bag upon inflation and exerts pressure on the liquid-filled bag. A heating element may be disposed on the inflatable pressure device bag to heat the liquid-filled bag to a desired temperature. The liquid may alternatively be maintained at a desired temperature, while flowing to a patient via a heating assembly disposed along a tube. The heating assembly includes a sleeve having a slot for receiving the tube and a plurality of individually controlled heaters. An infrared sensing device is mounted proximate a drip chamber to ascertain a drip count, while a temperature sensor is disposed within a holder that is positioned toward the entry site on a patient. A heat controller controls the heaters based on a drip count, while a safety controller disables heater operation in response to liquid temperature exceeding the desired temperature. Thus, the safety controller and heat controller, in combination, control the heating assembly heaters based on liquid temperature and flow rate, respectively. Alternatively, the liquid-filled bag may be heated to a desired temperature whereby the heating assembly includes a single heater controlled by a controller to maintain the liquid at the desired temperature during infusion of the liquid into a patient.

A system for controlling temperature control elements used to alter temperatures of a liquid comprises a temperature sensor, a first temperature control element, a second temperature control element, and logic. The temperature sensor is configured to sense temperatures of the liquid, and the first and second temperature control elements are each configured to alter a temperature of the liquid. The logic is configured to selectively control, based on the sensed temperatures, activation states of the first and second temperature control elements such that a total activation time associated with the first temperature control element is substantially equal to a total activation time associated with the second temperature control element.

A liquid supply apparatus includes: a plurality of heat exchange devices which are respectively provided in a plurality of supply paths for supplying liquids to a plurality of liquid ejection heads respectively, are supplied with a liquid medium adjusted to a predetermined temperature from a liquid temperature adjusting device, and conduct heat exchange between the liquids flowing in the plurality of supply paths and the liquid medium supplied from the liquid temperature adjusting device; a plurality of flow rate adjusting devices which are respectively provided correspondingly to the plurality of heat exchange devices and adjust a flow rate of the liquid medium supplied to each of the plurality of heat exchange devices from the liquid temperature adjusting device; and a controller which controls each of the plurality of flow rate adjusting devices to individually change the flow rate of the liquid medium supplied from the liquid temperature adjusting device to the plurality of heat exchange devices.

A startup control algorithm for a multiple compressor liquid chiller system is provided wherein the maximum number of compressors to be started to satisfy system load conditions is provided. The control algorithm designates all of the compressors of the multiple compressor system for starting and reduces the number to be started in response to the satisfaction of several predetermined criteria. The predetermined criteria are related to the leaving chilled liquid temperature, the shutdown time for the chiller system and the last operating time period for the chiller system.

A device according to present invention embodiments measures the temperature of fluid within an IV line at selected locations. The device may be in the form of a fitting including a projection in fluid communication with a fluid channel to receive a temperature sensor. A thermally conductive receptacle may be disposed in the projection to receive the temperature sensor and partially extends into the fluid channel for contact with the fluid. The temperature sensor may be coupled to a temperature display device and / or controller to display the measured temperature and / or control a thermal element to regulate fluid temperature. The fitting may further include a looped configuration and / or a control valve that controls the flow of fluid through the fluid channel. In addition, the device may further be connected to, or be in the form of, a needle hub to measure fluid temperature proximate the entry site on a patient.