57results about How to "Enhanced natural convection" patented technology

A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual fuel selection control valve, and / or temperature shut off control system may be incorporated into the dual fuel vent free heater.

An LED lamp with a flow guide structure guides external air to dissipate heat from the LED lamp includes a lamp base, a heat dissipating body, a heat dissipating plate and an LED module installed in the lamp base, and heat dissipating holes formed on the lamp base. The heat dissipating body includes heat dissipating fins, and a heat dissipating passage defined between any two fins and disposed corresponding to the heat dissipating hole. The LED module is in a thermal contact with the heat dissipating plate. The heat dissipating plate is attached onto the heat dissipating fins and includes openings. A flow guide plate is formed at a lateral edge of each opening and extended from the heat dissipating plate for guiding external air into the heat dissipating passage and out from the heat dissipating hole to expedite a natural convection in the lamp and prevent a thermal aggregation.

The invention discloses a loop heat pipe condenser, consisting of an evaporation chamber, a heat pipe and a sealed hollow condensation cavity, wherein the condensation cavity and the evaporation chamber are both provided with a working fluid inlet and a working fluid outlet; the working fluid outlet of the evaporation chamber is communicated with the working fluid inlet of the condensation cavity; the working fluid outlet of the condensation cavity is communicated with the working fluid inlet of the evaporation chamber through another pipe; the surface of the condensation cavity is provided with a plurality of fins. The heat pipes of the prior loop heat pipe devices directly extend through the fins; therefore, the condensation effect is not good; especially in case of heat dissipation through natural convection, the cooling effect is very poor. On the basis of the prior loop heat pipe devices, the invention is provided with a condensation cavity, and the evaporation chamber is connected with the condensation cavity through a pipeline; and then fins are arranged on the surface of the condensation cavity, thereby increasing the condensation area of the working fluid; at the same time, the loop structure of the condensation cavity effectively increases the effects of natural convection.

An LED lamp with a flow guide structure guides external air to dissipate heat from the LED lamp includes a lamp base, a heat dissipating body, a heat dissipating plate and an LED module installed in the lamp base, and heat dissipating holes formed on the lamp base. The heat dissipating body includes heat dissipating fins, and a heat dissipating passage defined between any two fins and disposed corresponding to the heat dissipating hole. The LED module is in a thermal contact with the heat dissipating plate. The heat dissipating plate is attached onto the heat dissipating fins and includes openings. A flow guide plate is formed at a lateral edge of each opening and extended from the heat dissipating plate for guiding external air into the heat dissipating passage and out from the heat dissipating hole to expedite a natural convection in the lamp and prevent a thermal aggregation.

The invention discloses a frost-free refrigerating system for a cold storage warehouse, which can remove frost in time in the use process to save energy, ensure uniform temperature field in the warehouse and achieve convenient use. The frost-free refrigerating system comprises an evaporator consisting of a plurality of groups of fin heat exchangers arranged at intervals and connected with each other in parallel, a water receiving tray arranged below each group of the fin heat exchangers, a telescopic water baffle connected with the water receiving tray and capable of wrapping the lower part of the fin heat exchanger when unfolded, a telescopic drive mechanism connected with the telescopic water baffle, a refrigerating system controller connected with the telescopic drive mechanism, and a water outlet on the lower end of the water receiving tray. The plurality of groups of fin heat exchangers can be operated flexibly by dividing into the plurality of groups, thus ensuring uniform temperature field in the warehouse. The refrigerating system is very convenient in processing the thawed frost water, and has the advantages of simple and convenient defrost operation, timely defrosting, improved refrigeration efficiency and energy saving.

The invention discloses a water-air radiant panel evaporative cooling air conditioning system provided with a cold beam and used for a data center. The system comprises an evaporative cooling high temperature cold water unit arranged outdoors and the passive cold beam arranged in a ceiling space of the data center. A return air inlet is formed in the wall, close to a ceiling, of the data center. The evaporative cooling high temperature cold water unit is connected with the passive cold beam through a water pipe set and an air pipe. The water-air radiant panel evaporative cooling air conditioning system provided with the cold beam and used for the data center overcomes the defects existing in the prior art, can be applied to reality more effectively, can reduce energy consumption of a draught fan, saves space occupied by the air pipe, and has the advantages of being comfortable, low in noise and easy to maintain and saving energy.

The invention relates to a rapid cooling vacuum cup based on a heat absorption solution. The rapid cooling vacuum cup based on the heat absorption solution is characterized by sequentially comprising an inner cup wall, a heat absorption solution layer, a middle cup wall, a heat insulation layer and an outer cup wall from inside to outside. The rapid cooling vacuum cup can cool high-temperature hot water and keep an appropriate drinking temperature for a long time as required; the heat absorption solution contains water, a preservative, an emulsifying agent and a food-stage dying agent, and absorbs heat of high-temperature hot water, so that high-temperature hot water is cooled rapidly to reach the appropriate drinking temperature; the heat insulation layer can prevent heat loss and keep the appropriate drinking temperature for a long time. The rapid cooling vacuum cup based on the heat absorption solution, which is provided by the invention, is simple in structure, is obvious in cooling velocity, and can be widely applied to the field of daily supplies of water cups and the like.

The invention provides a lamp housing, comprising a top plate and a side wall. The top plate is provided with a first edge, a second edge, a first group of top plate heat dissipation holes and a second group of top plate heat dissipation holes, wherein the first edge and the second edge are arranged correspondingly; each top plate heat dissipation hole has equivalent width and is in a strip type;the mutual spacing of the first group of top plate heat dissipation holes is twice of the width of the top plate heat dissipation holes; the mutual spacing of the second group of top plate heat dissipation holes is twice of the width of the top plate heat dissipation holes; the first group of top plate heat dissipation holes are arranged in parallel toward the center from the position which is 20to 24 times of the hole width distant from the first edge; the second group of top plate heat dissipation holes are arranged in parallel toward the center from the position which is 14 to 18 times ofthe hole width distant from the second edge; and the side wall is provided with side wall heat dissipation holes. In the lamp housing of the invention, top plate heat dissipation holes are opened on the top plate, thus being beneficial to natural convection of the air in the lamp housing, improving the heat dissipation efficiency of the lamp housing, and further reducing the temperature in the lamp housing.

A photonic apparatus made from a stretchable and flexible material is provided. The apparatus may be a garment is especially suitable for wearing around, for example, the torso of a person. The garment provides a wearer with light therapy within a specific wavelength range, which replicates the beneficial natural light of the sun therein providing health benefits which may include treatment of various medical conditions. The garment may take the form of a blanket, wrap, belt, cape, vest, hood, cap, headband, shirt or the like. The light source may include light emitting diodes (LEDs), optical fibers or solid state light emitting chips, which may be contained in a removable light transmitting pouch within the interior of the apparatus, so that the light may be powered by an internal power source to provide freedom of movement during treatment. In an embodiment, the light source is housed within the pouch wherein the pouch itself may be removed from the interior of the apparatus to be charged and replaced in the apparatus for wireless treatment use.

The invention discloses an LED heat radiation module, comprising of an LED light source module driven by an LED driver, and a heat radiation body connected with the LED light source module. The LED light source module is arranged in the center of the heat radiation body, and the heat radiation body consists of annular fins connected by a plurality of ribs. The LED light source module is connected on the ribs of the heat radiation body, the heat of the LED light source module is conducted to the annular fins through the ribs, and the heat of the annular fins is dissipated to the outside by the natural convection of air from bottom to top. Gaps are arranged between the annular fins of the heat radiation module, and the heat of the LED light source module can also be conducted to the annular fins on each layer through heat conduction grooves and heat conduction tubes, therefore the structure can greatly enhance the heat radiation effect of LED pendent lamp with the LED heat radiation module, meanwhile the structure of the heat radiation module has reduced weight and less production cost compared with the similar fin heat radiation structure, dust are rarely accumulated on the heat radiation fins arranged vertical the ground, and the heat radiation effect is enduring and efficient.

Provided is a power conversion device capable of preventing the occurrence of heat pockets by activating natural convection between mounted substrates. A power conversion device (1) is provided with a semiconductor power module (11) having one surface joined to a cooling body (3), and a plurality of mounted substrates (22, 23) laminated on the other surface of said semiconductor power module via an air layer and having mounted thereon circuit components including a heating circuit component (28) for driving said semiconductor power module. Said plurality of mounted substrates is tilted with respect to a flat surface orthogonal to the direction of gravity.

The invention discloses a shell-tube-type phase-change energy storage heat exchanger. The shell-tube-type phase-change energy storage heat exchanger comprises a heat exchanger shell cylinder, a heat source fluid inlet and a heat source fluid outlet, wherein the heat source fluid inlet and the heat source fluid outlet are formed in the two sides of the heat exchanger shell cylinder; the upper sidewall and the lower side wall of the heat exchanger shell cylinder are provided with a phase-change material filling port and a phase-change material discharging port correspondingly; and a plurality groups of heat exchange round tubes of which the two ends communicate with the heat source fluid inlet and the heat source fluid outlet correspondingly are arranged in the heat exchanger shell cylinder, and fins are evenly distributed on the outer wall of each heat exchange round tube. According to the shell-tube-type phase-change energy storage heat exchanger, by designing arrangement of the heatexchange round tubes, the heat exchanger fully adapts to the flowing and heat exchanging characteristics in the heat exchange process of a phase-change material, a temperature field and a velocity field achieve the synergistic effect, the heat exchange uniformity is improved, and the heat exchange rate is increased; furthermore, by additionally arranging the fins, the heat exchange area of the heat exchanger is effectively increased, the heat exchange coefficient is increased, and convection heat exchange is enhanced; in addition, by designing arrangement of the fins, the flow guiding effect of the fins is fully utilized, mutual disturbance among multiple tube bundles is enhanced, convergency and circulation of a liquid-phase area are promoted, the heat exchange rate is increased, and theheat exchange efficiency is improved.

The invention discloses a phase change energy storage electric bus radiation air conditioning system which comprises a phase change energy storage tank, a circulating pump, a water segregator, temperature control valves, a capillary network heat exchanger and a water collector. The circulating pump is connected to the left side of the phase change energy storage tank, and the water collector is connected to the right side of the phase change energy storage tank. In the heating period in winter, the phase change energy storage tank is filled with thermal fluid with a phase change capsule function, filling and recovering of the thermal fluid with the phase change capsule function are conducted in a bus junction station, and the stored heat of the thermal fluid with the phase change capsule function comes from a district heat supply network; and in the refrigerating period in summer, the phase change energy storage tank is filled with dynamic ice slurry, filling and recovering of the dynamic ice slurry are conducted in the bus junction station, and the dynamic ice slurry is obtained through a refrigerating system running at night. The position of an inlet of the water segregator is connected with the circulating pump, an outlet of each branch of the water segregator is connected with an inlet of the corresponding temperature control valve, an outlet of each temperature control valve is connected with an inlet of the capillary network heat exchanger, and an outlet of the capillary network heat exchanger is connected with an inlet of the water collector.

The invention provides an electrical box and an air conditioner outdoor unit. The electrical box comprises a box body, a PCB, and a radiator. The PCB and the radiator are mounted inside the box body. The electrical box further comprises power-consuming devices which generate heat. One end of every power-consuming device is mounted on the surface of the PCB; the other end of every power-consuming device contacts with the radiator. A preset gap is arranged between each two power-consuming devices on the PCB, and another preset gap is arranged between each power-consuming device and the box body; air flow passes the preset gaps to dissipate the heat. The air conditioner outdoor unit comprises the electrical box. The electrical box and the air conditioner outdoor unit have the advantages that the structural design is simple and reasonable, the preset gaps between the power-consuming devices in the box body allow flowing of air, natural convection is enhanced for the power-consuming devices, surface temperature of the power-consuming devices during operation is lowered, and reliability of the electrical box is improved.

A notch is provided on the cooling fin, and only a bent portion is provided on the periphery of the notch in the vertical direction. The glass tube heater is inserted into the notch and the bent portion is in contact with the glass tube. The heat of the tube heater defrosts the cooler in the form of radiant heat, and the cooler can be defrosted from the side of the glass tube by heat conduction from the glass tube to the cooling fins. This provides a cooler with a defrosting device capable of improving defrosting efficiency.

A combined refrigerator can be assembled individually, which is characterized in that a center shaft type module structure which is arranged in series is adopted. The refrigerator comprises a bottom freezing module, an overhead refrigerated module, a top capping, a bottom capping and a plurality of middle modules with different capacities, wherein each module has a respective storage chamber, and the bottom freezing module and the overhead refrigerated module respectively have an individually independent refrigerating system and a control system, modules are mutually connected through coaxial channels with same interfaces, and the coaxial channels are threaded through among the storage chamber of each module, the top capping and the bottom capping have connecting orifices which are engaged with the channels, and a close end is formed through arranging the top capping and the bottom capping on a module which comprises an external channel port. Users can freely select and buy according to the requirements, and can allocate and combine from the function selections to the form according to the own interests, thereby obtaining a unique refrigerator.

A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports. The gas outlet ports are in flow communication with at least one pilot flame burner. At least one fuel injector feeds fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual control valve, linkage, and / or shut off control system may be incorporated into the dual fuel vent free heater.

The invention discloses a sleeve phase change heat storage heat exchanger. The sleeve phase change heat storage heat exchanger comprises circular cooling fins, a vertical pipe, an upper end cover, a shell cylinder and a lower end cover. The plurality of circular cooling fins are vertically distributed at intervals and arranged on the periphery of the vertical pipe in a sleeving manner. The upper end cover is located above the circular cooling fins and fixedly connected with the upper end of the shell cylinder. The lower end cover is located below the circular cooling fins and fixedly connected with the lower end of the shell cylinder. The upper end of the vertical pipe penetrates the upper end cover and is fixedly connected with a through hole in the upper end cover. The lower end of the vertical pipe penetrates the lower end cover and is fixedly connected with a through hole of the lower end cover. According to the sleeve phase change heat storage heat exchanger, phase change materials are heated through cooling of the circular cooling fins on the periphery of the internal flow guide vertical pipe, and the sleeve phase change heat storage heat exchanger has the beneficial effects that the structure is simple, the heat exchange area is enlarged, and the overall heat storage and release efficiency is improved.

There is presented a pressure compensated subsea electrical system (5a, 5b, c, 5d, 5e). The pressure compensated subsea electrical system comprises a housing (8) filled with a dielectric liquid (12). The housing has a first housing portion (8a) and a second housing portion (8b) in pressure communication with each other. The first housing portion comprises a transformer (3), and the second housing portion comprises apower converter (4). The pressure compensated subsea electrical system comprises a pressure compensator (2) arranged to compensate pressure inside the housing. The pressure compensator is enabled to compensate pressure in both the first housing portion and the second housing portion.

A dual fuel vent free gas heater. In one implementation the heater includes a gas burner adapted to receive one of a first type of gas or of a second type of gas with a first pilot burner intended to receive the first type of gas and a second pilot burner intended to receive the second type of gas. A first temperature sensor is located adjacent the first pilot burner and a second temperature sensor is located adjacent the second pilot burner. A normally closed thermal switch is coupled to the first temperature sensor and located in the electrical flow path between a voltage source and a gas control valve actuator, the thermal switch configured to open when the temperature detected by the first temperature sensor exceeds a predetermined temperature indicative that the second type of gas is being delivered to the first pilot burner.

The invention provides a rim for a braked aircraft wheel, the rim comprising an outer circular portion (103) terminated at its ends by flanges (106a, 106b) for receiving a tire, the outer circular portion being connected by a wheel disk (105) to a hub (104) for fitting on an undercarriage axle in order to rotate about an axis of rotation coinciding with a central axis (X) of the rim, the rim beingdesigned to receive a tire on the outside of the outer circular portion and a brake on the inside, on one side of the wheel disk. According to the invention, the outer circular portion (103a) on theside of the wheel disk that is to receive a brake presents, in a plane containing the central axis of the wheel, a profile that has two slopes alpha and beta, relative to a direction parallel to the central axis on going from the wheel disk to the corresponding flange, and flaring towards the flange.

The invention discloses a solar air purification air heater. A motor and four universal wheels are installed at the bottom of the solar air purification air heater. A primary filter is arranged on theinner side of a double-layer pore plate air inlet, and an air valve is installed on the top of a static pressure box. An air heater shell layer, a first air channel and a second air channel are arranged in a concentric circle mode. An electrothermal film heating layer is arranged on the outer side of the left semicircle of the first air channel, a phase change heat storage material is arranged onthe outer side of the right semicircle of the first air channel, and a phase change heat storage material is also distributed on the inner side of the second air channel. Four circulating water pipesare evenly arranged in the phase change heat storage materials on the two portions. The air passes through the pore plate air inlet, a fan and an efficient filter in sequence so that the deep purification of the air can be achieved. The top of the solar air purification air heater is divided by an activated carbon box into two channels which include a primary purification outlet and an efficientpurification outlet, a solar absorption layer covers the outer surface of the whole device, and the intelligent control of the equipment can be achieved by a PLC. The solar air purification air heatercan effectively absorb and store the solar energy, outwards supply the warm air, remove pollutants in the air and be widely applied to indoor heating ventilation and air purification.

A light-emitting diode radiator comprises a substrate for affixing a light-emitting diode module and a plurality of cooling fins which are extended from the substrate, the cooling fins comprise first cooling fins and second cooling fins which are respectively extended from two reverse surfaces of the substrate, airflow channels are respectively formed in the various fins, and a plurality of notches which are inward extended and at least cut off part of the first cooling fins and the second cooling fins are arranged at the two sides of the substrate. Compared with the prior art, the cooling fins are formed on the two opposite surfaces of the substrate of the light-emitting diode radiator, thereby increasing the cooling area of the light-emitting diode radiator; meanwhile, a plurality of notches which are inward extended and cut off part of the cooling fins are arranged at the two sides of the substrate, the weight of the light-emitting diode radiator is reduced, and the natural convection of air in the cooling fins is enhanced, thereby upgrading the cooling efficiency of the light-emitting diode radiator under the premise of not increasing the size of the light-emitting diode radiator and the density of the cooling fins.

The invention discloses an optical engine module based on a low-heat-resistance heat dissipation technology. The optical engine module comprises an LED wafer, a circuit layer, an insulation layer and an aluminum substrate, wherein the LED wafer, the circuit layer, the insulation layer and the aluminum substrate are combined in sequence and fixedly connected. The optical engine module is characterized in that a plurality of heat dissipation holes are formed in the circuit layer; a positive electrode bonding pad and a negative electrode bonding pad are arranged on two sides of the lower end of the aluminum substrate respectively; a groove is formed in the middle of the lower end of the aluminum substrate; a copper foil layer is fixedly arranged in the groove; a flange is arranged on the copper foil layer; and a fluorescent layer formed by fluorescent powder colloids is arranged on the LED wafer. The optical engine module is simple in structure and excellent in heat conduction performance.

A cooler with a defroster having increased defrosting efficiency and a refrigerator having the cooler with the defroster. Cutouts are formed in cooling fins, bent parts are formed only at the vertical peripheral edges of the cutouts, and a glass tube heater is inserted into the cutouts. The bent parts are brought into contact with the glass tube of the glass tube heater to defrost the cooler by radiating the heat of the glass tube heater from the upper surface of the glass tube to the cooling fins and conducting it from the side surfaces of the glass tube to the cooling fins.

The invention discloses an LED bulb lamp for conducting cooling through surfaces of a lampshade and a lamp body in a combined manner. The LED bulb lamp comprises the glass lampshade, LED chips, a support, holes, bottom feet, a base, a drive circuit, the lamp body and a lamp holder. The closed lamp body is arranged above the lamp holder, the drive circuit is arranged in the lamp holder, and the base is arranged outside the lamp holder. The support is erected on the base. The LED chips are attached to the surface of the support. The glass lampshade is arranged outside the support and is arranged on the lamp body in a covering manner. The support is an eight-fan structure formed by folding sheets, the upper portion of the support is small, the lower portion of the support is large, gaps are formed in the bottom, the top is opened, and the shape similar to a hollow eight-edge column and eight-edge table combined body is formed. The lower portion of the support is bent outwards by 90 degrees and is connected to the base through heat-conducting glue or welding. The natural convection of gas inside the bulb is enhanced through the chimney effect of the support, heat is effectively transmitted to the lampshade, and the environment is cooled by sufficiently using the surface of the lampshade. The LED bulb lamp is particularly suitable for manufacturing small-power LED bulb lamps.

The invention belongs to the technical field of energy utilization and engineering thermophysics, and in particular relates to a combined dry-wet cooling tower adopting natural ventilation and combined operation mode and its application. The dry-wet combined cooling tower includes a tower body, a supporting structure, a dry cooling section, a wet cooling section and a flow distribution system; the tower body is in the form of a hyperbola, supported on the ground by a supporting structure; the dry cooling section and the wet cooling section are vertically Integrated in the same cooling tower; the dry-cooling section is located above the wet-cooling section; the dry-cooling section includes cooling triangles and dry-cooling section louvers; the wet-cooling section includes water eliminators, water distribution systems, filling areas, sumps and wet-cooling section louvers The flow distribution system includes the total inlet and outlet pipelines, the inlet and outlet pipelines of the dry cooling section, the inlet and outlet pipelines of the wet cooling section, valves and circulating pumps. The invention does not require fan power consumption, has high cooling efficiency, can provide lower water temperature out of the tower, and saves water resources.

The invention provides a coil structure for improving the zone-melting radial resistivity uniformity. The coil structure comprises a coil main body, a cooling water pipeline, a main seam, a plurality of sub seams and a plurality of transverse seams, wherein the coil main body is a flat plate coil; the upper surface of the coil main body is sunken into the inside of the coil into a centrosymmetric step structure; a coil hole is formed in the geometric center part of the coil main body; the cooling water pipeline is positioned inside a step at the outermost layer of the coil main body; the main seam is arranged on the coil main body in the radial direction and penetrates through the upper surface and the lower surface of the coil main body; the plurality of sub seams are arranged on the step surface at the innermost layer of the coil main body and penetrate through the upper surface and the lower surface of the step surface; the transverse seams are partially or all arranged on the sub seams; the transverse seams are perpendicular to the respective sub seam. The coil structure for improving the zone-melting radial resistivity uniformity has the advantage that due to the adaption of the technical scheme, the zone-melting silicon single-crystal radial resistivity uniformity can be simultaneously improved.