142results about How to "Improve heat distribution" patented technology

A disposable anti-fog airway adapter for use with a mainstream respiratory gas analyzer which provides a measurement of a patient's inhaled and exhaled gases. The airway adapter includes windows that are constructed of a thin, low heat capacity plastic that rapidly equilibrates to the temperature of the warm moist gases in the patient breathing circuit. In addition, the inside of the windows is also coated with an anti-fog surfactant either by laminating an anti-fog film with the window plastic prior to attaching the window to the airway adapter body or by first attaching the window to the airway adapter body and then applying the surfactant to the airway adapter after the window film is bonded in place so that the surfactant coats the entire inside of the adapter. The surfactant functions to increase the critical wetting tension of the surface it covers so that water on the window spreads into a uniform thin layer which does not absorb very much infrared energy and thus does not significantly reduce the signal strength. "Instant on" operation is accomplished because no heater and the like is necessary to warm up the windows to maintain them at an elevated temperature to prevent fogging. Numerous techniques are also provided for adhering the windows to the airway adapter body so that a substantially airtight seal may be obtained.

A seal and method of manufacture is provided for sealing containers such as bottles, jars and the like. The seal (i.e., closure) is formed with a lower sheet-like structure having a non-foam, heat-distributing layer thereon. The lower structure includes a foil support layer and has a polymer layer, such as a PET layer disposed on its bottom surface. A heat-activated sealant layer is provided under the bottom surface of the PET layer to bond the seal to a container opening. The non-foam, heat-distributing layer is preferably a polyolefin film. Seals in accordance with preferred embodiments of the invention also include a top portion, which is only partially bonded (directly or indirectly) to the bottom portion, so as to leave a tab portion extending from the seal. The top portion is advantageously bonded from periphery to periphery of the bottom portion and at or slightly offset from the diameter (middle) of the bottom portion. The top portion is advantageously formed with polymer material, such as an ethylene vinyl acetate (EVA) layer, having a layer of PET bonded on the top thereof. A release strip, which can have a release layer coated on the bottom thereof, is adhered to the top or bottom structures and used to prevent the tab from adhering to the lower structure.

The invention provides a microwave heating method and apparatus for evenly heating an object, such as a person's body. The methods and apparatus involve use of microwave source (or sources) that outputs multiple microwaves that are non-correlated with each other in phase; an array of antennas that radiate substantially plane microwaves to form a pseudo uniform microwave electromagnetic field, where the microwaves are not phase-correlated, in order to eliminate non-uniform heating caused by interference. Each of the antenna array consists of multiple antenna units, each antenna unit consists of at least one microwave radiator and at least one converter that converts the spherical microwave to plane microwave. A computer based control system and a temperature monitoring subsystem can be used to adjust the output of each antenna, in order to enhance the uniform heating effect. The apparatus and method can be used to perform whole-body hyperthermia or regional hyperthermia.

The present invention relates to a method of cooling a static electronic power converter device including at least one electrical circuit including an assembly of active components and of passive components mounted in a closed radiator housing from which only the inlet and the outlet of the circuit communicate with the outside of the housing, in which the distribution of the heat energy given off by the active and passive components is made uniform throughout the inside volume of the housing, and the heat energy is transferred from the radiator housing by forced convection in substantially uniform manner over the entire inside surface of the walls of the housing by causing at least one fluid contained inside the leaktight housing to circulate in a closed circuit. The invention also provides a static electronic power converter device enabling the method to be implemented.

Provided is an electrical apparatus comprising a magnetic core, a conductive coil wound around at least a part of the core, a cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and at least one biasing element operatively associated with the core to urge the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances. Further provided is a method for making an electrical apparatus comprising disposing a conductive coil wound around at least a part of a magnetic core, disposing a cooling element between the core and the coil, the cooling element configured to receive a cooling fluid to cool the core and the coil during operation, and urging the core and the coil into engagement with the cooling element despite differential expansion or contraction of the core and the coil and manufacturing tolerances.

A cylindrical rotary valve to control or affect fluid flow in processes where the fluid temperature must be maintained within a target range, the fluid pressure is varied and/or the amount of fluid flow is controlled comprising one or more of the following elements alone or in combination: (i) the use of a temperature control core in the valve shaft, (ii) the contoured or tapered shapes or the conduits (iii) the use of the valve to create predictable pulses or waves in the fluid being controlled, (iv) a modular system of valves where the valve body is fixed and the valve shaft is replaceable with a second valve shaft of different conduit shape, (v) a rotary valve with multiple inputs or multiple outputs for either mixing or diverting of input fluids, and (vi) the use of the valve in abrasive particulate blasting and in particular dry ice blasting.

The present invention relates to a DC/DC converter (1) with primary side (11) consisting of a resonant converter, which DC/DC converter (1) comprises a first and a second transformer (T1, T2), connected in series on the primary side (11) and on the secondary side (12) of the DC/DC converter. The secondary side (12) comprises an autotransformer (Tcd) consisting of a first and a second winding (Tcda, Tcdb) connected to a common center tap (Tcdc), where the first winding (Tcda) of the autotransformer (Tcd) is connected to the secondary winding (T1b) of the first transformer (T1), forming a first output connection point (P1), the second winding (Tcdb) of the autotransformer (Tcd) is connected to the secondary winding (T2b) of the second transformer (T2), forming a second output connection point (P2), and the center tap (Tcdc) of the autotransformer (Tcd) is connected to the positive output (21) of the secondary side (12). The secondary side (12) also comprises a first and a second rectifying switching device (S1, S2), where the first rectifying switching device (S1) is connected between the first output connection point (P1) and the negative output (22) of the secondary side (12), and the second rectifying switching device (S2) is connected between the second output connection point (P2) and the negative output (22) of the secondary side (12). The present invention also relates to a DC/DC converter system comprising at least two inventive DC/DC converters (1).

An oven for heating a coating on a substrate, such as a painted vehicle body, including a first zone having radiant tubes and shields above the tubes and a second zone including side heat chambers having nozzles directing heated air onto a coated substrate and a hold zone. The radiant tubes may include a first linear portion extending through the oven and return loop beneath the substrate to conserve energy and sill ducts directing heated air against the underside of the vehicle body. The temperature is controlled by sensors contacting the radiant tubes and a proportional integral control system.

The invention relates to a rotary magnetic field generating device for welding. The rotary magnetic field generating device comprises a coil support (2). A welding gun fixing clip (7) is fixedly arranged in the center of the coil support through a welding gun fixing bracket (6); and a welding gun (1) is installed on the welding gun fixing clip (7). Two groups of coils in the same height are fixedly arranged on the coil support (2), and the two groups of coils are spaced by 90 degrees. The two groups of coils are respectively connected with an excitation power supply through a waveform positioner; the two groups of coils are adjusted and are respectively connected with a synchronous sine alternating current and a synchronous cosine alternating current. A phase difference between the sine alternating current the cosine alternating current is 90 degrees. After being electrified, a magnetic field parallel to a coil axis is generated in the middle of each group of coils; and the magnetic field also changes in sine and cosine along with the changes of the electric current. The magnitude of the magnetic field is unchanged during a circling motion along the magnetic field direction, and accordingly a welding arc is also in the circling motion along with the magnetic field. When the welding gun moves forward, the electric arc moves forward spirally to finish the welding.

A ventilation unit for use with a heating or cooling system that is decentralized and does not require large conduits is disclosed. The system includes at least one fresh air intake; a fan operatively connected to the at least one fresh air intake for drawing air from outside of a space into the fresh air intake; and at least one ventilation unit located in the room. The ventilation unit includes a conduit defining an air passage having a first and second opposite ends, a diffuser operatively connected to the fresh air intake for outputting fresh air near the second opposite end of the conduit and for drawing ambient air from the room through the first opposite end. The ventilation unit also includes a heating element located downstream from the first opposite end inside the conduit. The ambient air is entrained towards the heating element which heats the ambient air, and the heated air is ventilated into the room at the second opposite end of the conduit by the action of a chimney effect and the fresh air diffuser. The system provides for adequate ventilation through the use of small conduits due to the decentralized heating of the air.

A passive-matrix display device having a plurality of chiplets, each chiplet associated with one or more independent column electrodes located in the display area, each chiplet electrically connected to and driving a separate subset of the independent column electrodes and electrically connected to and driving a subset of the row electrodes to cause the light-emitting material in each pixel to emit light, wherein each chiplet includes a serial luminance shift register for shifting pixel luminance values corresponding to each independent column electrode from one chiplet to another and a column driver for driving each of the independent column electrodes to which it is connected with the corresponding pixel luminance values; and wherein each chiplet further includes a row driver for driving each corresponding row electrode to which it is connected and a row control shift register for controlling the row drivers.

An improved radiant gas burner unit is provided having a shallow base with long walls and shorter walls. The shallow base supports a radiant gas burner plate or plates having openings therethrough, and forming an external surface of the base for emitting high temperature gas radiation. At least three mixing tubes are provided aligned with the shorter wall, and having two open ends. The first open end is positioned within the base and the second open end is positioned adjacent corresponding openings formed through the long wall of the base. A gas supply line extends along the long wall and has gas outlets for ejecting gas across an open air gap positioned intermediate the gas outlet and the second open end of the mixing tubes. The ejected gas is mixed with air as it crosses the air gap, and is provided to the openings of the radiant gas burner plate for combustion which produces high temperature radiation on the radiant gas burner plate and external surface of the base.

A low emission and environmentally friendly apparatus and method is used to generate a high pressure stream of thermal vapor. The thermal vapor stream may be injected into a subterranean formation for recovery of highly viscous petroleum or used to turn a steam turbine for driving an electrical generator. In one implementation, the high pressure stream of thermal vapor is generated by burning a high temperature fuel, including any short or long chain hydrocarbon products from methane to coal, in an enclosed vessel to produce combustion gases. Various techniques may be used to improve heat distribution and lower the temperature of the combustion gases. Water may be used to quench the combustion gases and produce the superheated steam or vapor. The water may be introduced onto the combustion gases by spraying, weeping, dripping, and the like.

The invention relates to a composite pole plate of a lithium ion battery and a preparation method of the composite electrode, relating to the field of battery preparation, and in particular to the field of preparation of the lithium ion battery. The composite pole plate is characterized in that a current collector layer is arranged at the middle of the composite pole plate, a base coating layer is arranged on each of the upper surface and the lower surface of the current collector layer, an active substance layer is arranged on each of the outer surfaces of the base coating layers on the two surfaces, and a spraying layer is arranged on each of the outer surfaces of the active substance layers. By the composite pole plate, the defects such as poor safety performance and difficulty in consistency control of the lithium ion battery are overcome, and the lithium-ion composite pole plate has the advantages of simplicity in preparation, high consistency and high safety and is also applied to the lithium ion battery.

A radiative heater for substrates in a physical vapor deposition process for fabricating films of materials in a wide dynamic range of process temperatures and gas pressures includes a heat radiating member made from a high-temperature and oxidation resistant material tolerant to vacuum conditions which separates a heater volume containing heating filaments from a process volume which contains a deposition substrate heated by radiation of the walls of the heat radiating member. The heating elements extend through the body of the heat radiating member as well as in proximity to its surface to provide delivery of the heat to the substrate. The heat radiating member is shaped to form a cavity containing the substrate. The walls of the cavity envelope the substrate and radiate heat towards the substrate. Alternatively, the substrate is adhered to the flat surface of the heat radiating member.

The invention discloses an electric automobile charger. An uncontrolled rectifier and a BUCK type PFC two-stage structure are adopted in a main circuit, the charger is of a two-channel parallel structure, the power level of a convertor is improved, the heat distribution of the system is improved, the reliability of the system is improved, the service life of the system is prolonged, power factors of the system are greatly improved, and the power factors reach 0.998 in the stable status. A ZCS resonance circuit is adopted in the charger, soft switching of a switching element is achieved by controlling the matching of the communicating time of a Q1 and a Q4 and the resonant periods of a Cr and an Lr, and therefore the efficiency of the convertor is greatly improved. A switching tube Q2 and a switching tube Q3, and a switching tube Q5 and a switching tube Q6 form two bridge arms of an inverter circuit respectively, full-control type inversion is carried out by controlling communication signals of the switching tubes, and a single-phase alternating-current portable power source is provided. The requirements of the automobile charger for being small in size, light in weight and low in cost are met through the effective reuse of hardware.

The present invention describes a method of CVI densification in which particular arrangements and mixtures of undensified porous substrates and partially densified porous substrates are arranged in particular ways in order to use the thermal characteristics of the partially densified porous substrates to better distribute heat throughout a CVI furnace and thereby improve densification.

A pedestal is provided for use in combination with a support such as a susceptor sheet which has a susceptor surface supporting a food product. The pedestal is positioned above a microwave oven floor. This combination functions to trap heated vapor within an open surface defined by the oven floor and pedestal. The support sheet and a dough-containing food product assembly has a storage mode which permits the food product to be stored within a refrigerated area of a convenience store. The planar portion of the pedestal and of the support sheet include openings in selected respective areas which generally align when in use.

Horizontally arranged burners for boiler furnaces are provided where each burner includes a fuel nozzle surrounded by a secondary air outlet. The fuel nozzle and secondary air outlets may tilt in tandem with respect to an air plenum supplying inner secondary air and a fuel carrier providing fuel. Also provided are outer secondary air buckets that may independently tilt with respect to a frame connected to the air plenum. This arrangement can be installed as a retrofit in a conventional horizontal furnace system or in a newly built system. The fuel nozzle and secondary air outlet, and secondary air buckets may all tilt in unison or may all tilt independently. The tilting assists with optimizing a flame temperature profile within the furnace.