Abstract:
A cooling device for electron tubes, exploiting the vaporization of a liquid contained in sealed tanks, surrounding the tube anode. The vaporization of the liquid is controlled by a valve associated with the tanks. The blowoff pressure of this valve is equal to the vaporization pressure at the selected temperature of operation.
Abstract:
An LED illuminating device includes a housing defining a sealed boiling room, an optical module and an adiabatic member. The boiling room has a lower room and annular room surrounding the lower room. A wick structure is received in and attached to an inner side of the housing. Working fluid is received in the boiling room and saturated in a bottom portion of the wick structure located at a bottom of the lower room. The optical module is provided with a plurality of LEDs attached to the housing at a position under the bottom portion of the wick structure. The adiabatic member is received in the boiling room and attached to a middle portion of the wick structure at a top of the lower room for avoiding thermal and flow interactions between liquid in the middle portion of the wick structure and vapor in the lower room.
Abstract:
An isothermal heating device comprises an annular tubular body providing a heating chamber for objects. Between the inner wall and the outer wall of this tubular body there is provided a plurality of separate ducts which are situated in a ring-shape about the heating chamber and which extend parallel to the tubular body axis. These ducts contain an evaporable heat transport medium and are in communication with each other preferably at one end of the tubular body. Such interconnection is in turn connected with a gas buffer reservoir containing an inert control gas.
Abstract:
In order to make it possible, using air in particular, to cool certain high power tubes the collector of which has dimensions too small to permit of such cooling itself, the invention provides for the association with the collector, cooled by evaporation of liquid, of a large-area element delimiting a closed volume partially occupied by the liquid mass in question, the cooling of said element being responsible for producing condensation of the vapour resulting from said evaporation, and the regeneration of the liquid mass.
Abstract:
A radial heat pipe has a plurality of radial struts covered with capillary lining which extend from an outer cylindrical heat output wall to an inner cylindrical heat input wall to assist in returning a working fluid from the heat output wall to the heat input wall. A deformable metallic lining is attached to the outside of the cylindrical heat input wall to provide a close fit with and a good thermal path from a heat source member to the heat input wall. The heat pipe also has a tube extending down its central axis which permits force to be applied to the heat source member to separate the heat source member from the heat pipe.
Abstract:
In a glass-making method and a tool involved in carrying out the method, the tool is subjected to heating. The invention provides for controlling the temperature of the tool by providing the latter with at least one internal chamber and accommodating therein a vaporizable volatile heat-exchange medium which is evaporable in the chamber in one region thereof as a result of the heating of the tool, moves to another cooler region where it becomes condensed, and is returned to the one region by capillary means accommodated in the chamber.
Abstract:
An LED lamp including a glass lampshell and a stem assembly with one end inserted into the glass lampshell. The stem assembly comprises a glass trumpet tube with one end sealed within the glass lampshell to form a cavity within the glass lampshell and within the cavity a supporting component connected to the glass trumpet tube and supporting an LED emitter. The stem assembly further comprises a wire encompassed within the glass trumpet tube. The wire has one end extending outside of the cavity and the other end electrically connected to the LED emitter.
Abstract:
The disclosure concerns X-ray tubes. To obtain greater temperature stability of an X-ray tube, a substance is placed in the circulation space of the cooling fluid of the tube. The latent heat of fusion of this substance is used so that it melts during the examination stage in absorbing heat, and gets solidified during the resting stage. The disclosure is applicable to X-ray tubes.
Abstract:
A linear beam tube has multiple heat pipes formed integrally in the cavity wall between the beam collector and external air cooling fins. The heat pipes use sintered copper pellets on the walls of the pipes as wicks to facilitate the return flow of liquid condensed at the fins. Circumferential channels connect the heat pipes at each end to reduce vapor lock effects. Vapor surface area enhancement rods are used at the heat source to increase the transfer rates of heat into the fluid.
Abstract:
A heating device, comprising a tubular body whose inner wall bounds a heating chamber for objects. Between the inner wall and the outer wall of this body a plurality of ducts is provided which are situated in a ring-shape about the heating chamber and which extend parallel to the tube axis. These ducts are separated from each other by rigid partitions. Each duct contains evaporable heat transport medium.