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.

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 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 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 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 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 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.

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 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.