4642 results about "Cooling chamber" patented technology

A catheter includes a cryoablation tip with an electrically-driven ablation assembly for heating tissue. The cryoablation tip may be implemented with a cooling chamber through which a controllably injected coolant circulates to lower the tip temperature, and having an RF electrode at its distal end. The RF electrode may be operated to warm cryogenically-cooled tissue, or the coolant may be controlled to conductively cool the tissue in coordination with an RF treatment regimen, allowing greater versatility of operation and enhancing the lesion size, speed or placement of multi-lesion treatment or single lesion re-treatment cycles. In one embodiment a microwave energy source operates at a frequency to extend beyond the thermal conduction depth, or to penetrate the cryogenic ice ball and be absorbed in tissue beyond an ice boundary, thus extending the depth and / or width of a single treatment locus. In another embodiment, the cooling and the application of RF energy are both controlled to position the ablation region away from the surface contacted by the electrode, for example to leave surface tissue unharmed while ablating at depth or to provide an ablation band of greater uniformity with increasing depth. The driver or RF energy source may supply microwave energy at a frequency effective to penetrate the ice ball which develops on a cryocatheter, and different frequencies may be selected for preferential absorption in a layer of defined thickness at depth in the nearby tissue. The catheter may operate between 70 and minus 70 degrees Celsius for different tissue applications, such as angioplasty, cardiac ablation and tissue remodeling, and may preset the temperature of the tip or adjacent tissue, and otherwise overlay or delay the two different profiles to tailor the shape or position where ablation occurs or to speed up a treatment cycle.

Discloses herein are ablative catheters and methods of use. The catheters can include a cooling chamber for circulating cooling fluid within the catheter tip to reduce hot spots within the catheter tip and / or to reduce the formation of coagulum. A proximal cooling chamber can be positioned proximally to a thermal mass for cooling a proximal portion of the catheter. In addition, or alternatively, a distal cooling chamber can be positioned for cooling a distal portion of the catheter tip. The cooling fluid can flow the ablative catheter in an open, closed, or open and closed loop.

A grow light having an exterior shell with an air inlet and a hot air exhaust outlet, and a specular interior insertable into the shell. The sides of the specular insert are spaced apart from the walls of the shell so as to form a double-walled housing having air cooling chambers and vents which facilitate the movement and exhaust of air heated by high intensity light bulbs.

An air conditioning unit is provided for a parked truck / boat to cool the sleeping cabin. The cabin air conditioner having a cooling unit comprising a cooling chamber with at least one insulated wall having on opposite sides there of a heat sink and a cooling block having there between thermoelectric chip(s) or a high efficient D.C. compressor or cold storage phase change material. The air conditioning unit also comprises an air intake conduit, a cool air conduit, an exhaust conduit and means of supplying power to the cooling unit. A method for cooling the. sleeping cabin through the use of the air conditioning unit disclosed in the invention is also provided.

Cooling devices are provided to reduce a person's temperature by evaporative, convective, and / or conductive cooling. One such device maximizes evaporative cooling by aiding the flow of air to the person and the removal of vapor-laden air from the person. An upper sheet and a base sheet are adhered to define numerous elongated, parallel, inflatable cooling chambers separated by flat connecting membranes. Ventilating cross-members interconnect the cooling chambers. Air enters the chambers through an inlet, exits the chambers toward the person through air permeable regions of the base sheet. Air heated by the person's body exits the device upward through evaporation openings in the connecting membranes. The foregoing device, or different variations thereof, may be modified for use in conductive cooling by adding an absorbent sheet beneath the base sheet, or substituting the absorbent sheet for the base sheet itself This device directs air upon the wetted absorbent sheet to cool this layer, and thereby conductively cool the patient's skin in thermal contact with the absorbent sheet. As one example, this device may be configured in serpentine shape, with multiple winding segments. The device may include body-contour slits extending inward from the perimeter, permitting the device to conform to a person's legs and outstretched arms. Cooling devices may also include optional features to enhance thermal contact between the absorbent sheet and the person's skin, and / or to prevent water runoff from the cooling field.

A refrigerator includes: a refrigerator main body having a cooling chamber; a cooling chamber door for opening and closing the cooling chamber; a shelf assembly provided within the cooling chamber such that a height thereof is adjustable; and a basket provided in any one of the refrigerator main body and the cooling chamber door such that a height thereof is adjustable. A space of the refrigerator main body or the cooling chamber door can be utilized to facilitate receiving and keeping food items.

A refrigerator is disclosed. The refrigerator includes a main body which has a cooling chamber and a freezing chamber, a storage chamber which is provided in the cooling chamber to store foodstuffs, an irradiation device which irradiates light within a visible light region correspondingly to color of the foodstuffs stored in the storage chamber, an optical deodorization module which includes an ultraviolet light irradiation device which is mounted to the storage chamber to irradiate ultraviolet light and a photocatalyst filter which receives the ultraviolet light from the ultraviolet light irradiation device and is coated with a photocatalyst agent, and a control unit which controls the irradiation device and the ultraviolet light irradiation device.

A catheter includes a cryoablation tip with an electrically-driven ablation assembly for heating tissue. The cryoablation tip may be implemented with a cooling chamber through which a controllably injected coolant circulates to lower the tip temperature, and having an RF electrode at its distal end. The RF electrode may be operated to warm cryogenically-cooled tissue, or the coolant may be controlled to conductively cool the tissue in coordination with an RF treatment regimen, allowing greater versatility of operation and enhancing the lesion size, speed or placement of multi-lesion treatment or single lesion re-treatment cycles. In one embodiment a microwave energy source operates at a frequency to extend beyond the thermal conduction depth, or to penetrate the cryogenic ice ball and be absorbed in tissue beyond an ice boundary, thus extending the depth and / or width of a single treatment locus. In another embodiment, the cooling and the application of RF energy are both controlled to position the ablation region away from the surface contacted by the electrode, for example to leave surface tissue unharmed while ablating at depth or to provide an ablation band of greater uniformity with increasing depth. The driver or RF energy source may supply microwave energy at a frequency effective to penetrate the ice ball which develops on a cryocatheter, and different frequencies may be selected for preferential absorption in a layer of defined thickness at depth in the nearby tissue. The catheter may operate between 70 and minus 70 degrees Celsius for different tissue applications, such as angioplasty, cardiac ablation and tissue remodeling, and may preset the temperature of the tip or adjacent tissue, and otherwise overlay or delay the two different profiles to tailor the shape or position where ablation occurs or to speed up a treatment cycle.

A system and method for cooling back to back electronic displays. Transparent first and second gas chambers are co-existive with the front display surfaces of the first and second electronic displays. A closed loop of isolated gas enters the first and second gas chambers and contacts the front surfaces of the electronic displays, where it may extract heat from the front display surfaces. The isolated gas is then directed into a cooling chamber where it is cooled and re-introduced into the first and second gas chambers. Fans may be used to propel the isolated gas through the cooling chamber and the first and second gas chambers. The circulating gas removes heat directly from the electronic display surfaces. The isolated gas is transparent or at least semi-transparent to ensure that the image quality of the electronic displays is minimally impacted.

The present invention provides a medical device having an catheter body defining proximal and distal portions, and a guidewire lumen at least partially disposed within and movable within the catheter body. The medical device may include an expandable element defining a proximal end and a distal end, wherein the proximal end is coupled to the distal portion of the catheter body and the distal end is coupled to the guidewire lumen. In addition, an actuator element may be coupled to the guidewire lumen for longitudinal movement thereof, and a tensioning element may further be coupled to the guidewire lumen to bias the guidewire lumen and / or the expandable element towards a particular geometric configuration.

An airfoil part includes a plurality of cooling chambers that are spaces into which the inside of the airfoil part is partitioned, from a leading edge side to a trailing edge side, by a partition wall, that extend in a vane-longitudinal-section direction, and that include division parts on inner walls of a body; insert cylinders that are disposed in the cooling chambers and that have a plurality of impingement holes; and film holes that are provided in the body. The insert cylinders include partitioning parts that extend from the leading edge side to the trailing edge side and that extend in the vane-longitudinal-section direction. The insides of the insert cylinders are partitioned into pressure-surface-side insert spaces close to a pressure surface and suction-surface-side insert spaces close to a suction surface.

A microwave surgical ablation probe having an arrangement of coolant channels in fluid communication with a cooling chamber disposed within the distal end of the probe is disclosed. A hypotube having one or more longitudinal ribs extending radially inward from an inner surface thereof is coaxially disposed around a coaxial feedline. The longitudinal ribs of the hypotube engage an outer sheath of the feedline to define a fluid inflow channel to deliver coolant to the cooling chamber, and a fluid outflow channel to receive fluid from the cooling chamber. The cooling chamber may be formed from porous ceramic or porous metallic material that provides structural support to the probe while permitting coolant to circulate therethrough. The probe includes dielectric and choke members that are adapted to control the microwave radiation pattern (e.g., ablation shape), and which may provide improved coupling of the probe to tissue.

A heat exchanger includes a cooling plate having a heat collection surface for fixing against an object to be cooled, an opposed heat transfer surface which may be provided with fins, and a cooling chamber over the heat transfer surface, the cooling chamber having an inlet port and an outlet port for circulating a fluid through the cooling chamber via a flow path between the ports. A flow distributor in the flow path forms a plurality of inlet channels communicating with the inlet port, a plurality of outlet channels alternating with the inlet channels and communicating with the outlet port, and a plurality of flow surfaces which are spaced from the heat transfer surface by gaps. The inlet channels communicate with the gaps so that a fluid entering the inlet channels via the inlet port will flow through the gaps, into the outlet channels, and out of the chamber via the outlet port. The gaps are dimensioned to increase fluid velocity and promote mixing of the fluid, thereby improving heat transfer.

A method of performing an ablation procedure includes the initial step of supplying a fluid to a cooling chamber defined within an antenna assembly. The method also includes the steps of decreasing the temperature of the fluid to form a solid material and inserting the antenna assembly into tissue. The method also includes the step of supplying energy to the antenna assembly to treat tissue. Residual heat from the antenna assembly transitions the solid material back to the fluid. The method also includes the step of circulating the fluid within the antenna assembly to dissipate heat emanating from the antenna assembly.

Preferred embodiments relates to a cooling system and a method for cooling an electronic display. Embodiments include a transparent liquid cooling chamber, a reservoir tank, and a pump. The components in the system are preferably housed within the electronic display housing. The cooling chamber defines a fluid compartment that is anterior to and coextensive with the electronic display surface. Circulating coolant removes heat directly from the electronic display surface by advection. In order to view the display, the coolant fluid is transparent or at least semi-transparent. The image quality of an exemplary embodiment remains essentially unchanged, even though coolant is flowing over the visible face of the electronic display surface.

Disclosed is an apparatus and method for uniform selective cerebral hypothermia. The apparatus includes a brain-cooling probe, a head-cooling cap, a body-heating device and a control console. The brain-cooling probe cools the cerebrospinal fluid within one or more brain ventricles. The brain-cooling probe withdraws a small amount of cerebrospinal fluid from a ventricle into a cooling chamber located ex-vivo in close proximity to the head. After the cerebrospinal fluid is cooled it is then reintroduced back into the ventricle. This process is repeated in a cyclical or continuous manner. The head-cooling cap cools the cranium and therefore cools surface of the brain. The combination of ventricle cooling and cranium cooling provides for whole brain cooling while minimizing temperature gradients within the brain. The body-heating device replaces heat removed from the body by the brain-cooling probe and the head-cooling cap and provides for a temperature difference between the brain and the body where the brain is maintained a temperature lower than the temperature of the body.

An ice-cream maker comprising: a body having a rotatable paddle; a cooling chamber supported by the body for receiving an ice-cream mixture, the paddle being adapted to move through the ice-cream mixture; a sensor module for detecting a hardness measure of the ice-cream mixture; a processor module coupled to the sensor module for receiving a signal indicative of the hardness measure, the processor module being adapted to control the operation of the paddle. After the ice-cream mixture has reached a selected hardness, the processor module periodically operates paddle to churn the mixture to substantially maintain the mixture at the selected hardness. Before introduction of the mixture, the processor module can operate a cooling element to pre-cool the cooling chamber.

A system for processing semiconductor wafers, includes a plurality of front opening unified pods (FOUPs), loadlocks for receiving the plurality of wafers, a plurality of process chambers configured to perform processing steps and or measurement steps on the wafers, loadlock cooling stations for receiving the wafers from the processing chambers and a transport chamber interconnecting the loadlocks, cooling chambers and process chambers. A first multi-axis robot transfers wafers between the FOUPs, loadlocks and loadlock cooling stations, at an ambient pressure. A second multi-axis robot tranfers wafers between the loadlocks, process chambers and the loadlock cooling stations, and is adapted to operate in a transport chamber at a pressure that is different from the ambient pressure.

A cooling system and a method for cooling an electronic display. A preferred embodiment utilizes a closed loop cooling system in a constricted convection cooling setup to remove heat from the backlight of a display assembly. Cooling air can be pulled or pushed through a gap between the display (or backlight) and a rear cooling chamber. The resulting warm air can then be exhausted out of the display housing. The cooling air may be air conditioned or may be exposed to a thermoelectric device. A thermostat may be used so that cooling fans are only energized when the temperature reaches a predetermined point.

An exemplary embodiment relates to a cooling system and a method for cooling an electronic display. A preferred embodiment includes a transparent gas cooling chamber. The transparent gas cooling chamber may have a linear polarizer. The components in the system are preferably housed within the electronic display housing. The cooling chamber defines a gas compartment that is anterior to and coextensive with the electronic display surface. Fans may be used to propel the isolated gas through the cooling chamber. The circulating gas removes heat directly from the electronic display surface by convection. The isolated gas is transparent or at least semi-transparent. The image quality of an exemplary embodiment remains essentially unchanged, even though the gas is flowing through a narrow channel over the visible face of the electronic display surface.

A method and system for determining contact assessment includes the steps of positioning a catheter at a tissue treatment site, where the catheter has a proximal end portion and a distal end portion, the proximal end portion defining at least one fluid inlet port and at least one fluid outlet port, an expandable membrane defining a cooling chamber a coolant injection lumen in fluid communication with the at least one fluid inlet port and the cooling chamber, a coolant return lumen in fluid communication with the at least one fluid outlet port and the cooling chamber, the coolant injection tube, the cooling chamber, and the primary coolant return lumen defining a fluid pathway and a temperature sensor located near the coolant return lumen; measuring an internal temperature of the chamber, and modifying the position of the catheter in response to the measured temperature. The method and system can also use a measured impedance to determine contact assessment.

A closed-cycle refrigerator provides cooling to extremely low temperatures, particularly in the range of 0.5 K to 2.0 K. A 4 K pulse-tube cryocooler cold head or G-M cryocooler cold head liquefies helium in a first cooling chamber at a pressure at approximately 1 atmosphere. Liquid helium flows from the first cooling chamber, through a Joule-Thomson valve, and into a second cooling chamber under a pressure differential created by a pump. Helium vapor extracted from the second cooling chamber by the pump is routed back to the first cooling chamber to be re-condensed. This closed-cycle design provides continuous cooling below 2 K. Cryocooler cold head cold sections have no physical contact with subsequent cooling elements, such as the first and second cooling chambers to reduce vibration transfer. In some embodiments the cryocooler cold head is connected to a vacuum chamber via a vibration damping coupler to further reduce vibration transfer.

An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. In the first case, the coolant also inflates the balloon, and spent coolant is returned to the handle via a return passage extending through the body of the catheter. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. Various configurations, such as surface modification of the balloon interface, or placement of particles, coatings, or expandable meshes or coils in the balloon interface, may be employed to achieve this function.

A cooled component wall (52) with a combustion gas (36) on one side (56) and a coolant gas (48) with higher pressure on the other side (58). The wall includes a cooling chamber (60) with an impingement cooling zone (62), a convective cooling zone (64), and a film cooling zone (66). Impingement holes (70) admit and direct jets (72) of coolant against the wall, thence the coolant passes among heat transfer elements such as channels (76) and fins (78) to the film cooling zone (66) where it passes through holes in the wall that direct a film of the coolant along the combustion side of the wall. The chamber may be oriented with the impingement zone (62) downstream and the film cooling zone (66) upstream, relative to the combustion gas flow (36). This provides two passes of the coolant (84, 79) in opposite directions over the respective opposite sides of the wall (56, 58).