Abstract: A gas mixer includes at least one outlet pipe and a base having an inlet portion and a mixing portion. The inlet portion has an air inlet, at least one gas inlet, and an air path. The air path communicates with the air inlet and the at least one gas inlet, and has an exit. The mixing portion has a mixing chamber communicating with the exit. The outlet pipe is engaged with the mixing portion of the base, and extends into the mixing chamber. The exit of the air path corresponds to a body of the outlet pipe. Therefore, air and gas can be effectively premixed and outputted to a burner, whereby to accurately control the air-fuel ratio to enhance the combustion efficiency of the burner.

Abstract: A heat gun includes a head portion. The head portion defines a flow passage having an inlet end at one end and an outlet end at another opposite end, and includes an inlet portion, an outlet portion and a flow guiding portion disposed between the inlet and outlet ends. The outlet portion is formed with two long sides and two short sides. The flow guiding portion is disposed between the inlet and outlet portions. The flow passage includes two flow guiding protrusions disposed at the flow guiding portion. The two flow guiding protrusions are disposed oppositely and extend oppositely along the long sides.

Abstract: A gas-burning appliance includes a combustor and a flow guide device engaged with the combustor. The combustor has a gas outlet. The flow guide device includes a separator and two stop plates. The separator has an opening. Each of the stop plates is located at the opening, and a top edge thereof is higher than a top surface of the separator. The combustor is located below the separator with the gas outlet corresponding to a space between the stop plates. The flow guide device has at least one first air inlet, which is located below the separator, and communicates with the space between the stop plates. A gas fireplace includes a firebox, a translucent shield, and the gas-burning appliance. A separator divides the firebox into an air chamber, which receives the combustor, and a combustion chamber. Whereby, the visibility of flame and the combustion efficiency could be improved.

Abstract: A wick configured from a single metallic meshed wick material continuously includes a spiral section with a shape including at least one loop, a folded section with a shape including a fold, a first length extending away from the spiral section to the fold and along a first imaginary plane and a second length extending from the fold to the spiral section and along a second imaginary plane, and a wrapped section with a shape including at least one contour conforming shapes of the spiral and folded sections.

Abstract: A burning device includes a body and an air amplifier mounted in the body. The air amplifier includes a fuel channel between an inlet and an outlet of the air amplifier. The fuel channel includes an intermediate section between an inlet section and an outlet section. A width of the inlet section gradually decreases from the inlet towards the intermediate section. A width of the outlet section gradually increases from the intermediate section towards the outlet. A width of the intermediate section is smaller than the width of the inlet section and the width of the outlet section. The air amplifier includes a plurality of side channels. Each side channel extends along an extending axis not intersecting with a longitudinal axis of the fuel gas channel and includes an inner end intercommunicating with the fuel channel and an outer end intercommunicating with an outer periphery of the air amplifier.

Abstract: A liquid crystal composition includes a nematic liquid crystal, and a compound of Formula (I) where R is an alkyl, aryl, aralkyl or heteroaryl having 6 to 30 carbon atoms, wherein the compound accounts for 0.3 to 0.6% of the liquid crystal composition. Further, a sensing device includes a substrate, a frame, an alignment film, the liquid crystal composition as described above, and two polarizers. The frame is connected to the substrate and forms an accommodation space having an opening, and the alignment film and the liquid crystal composition are both located inside the accommodation space. One of the polarizers is arranged in correspondence with the opening such that a channel exists between the polarizer and the frame, the other polarizer is located at a lateral side of the substrate, and the polarization directions of the two polarizers intersect with each other.

Abstract: A heat gun includes a head portion. The head portion defining a flow passage having an inlet end at one end and an outlet end at another opposite end, and including an inlet portion, an outlet portion and a flow guiding portion disposed between the inlet and outlet ends. The outlet portion is formed with two long sides and two short sides. The flow guiding portion is disposed between the inlet and outlet portions. The flow passage includes two flow guiding protrusions disposed at the flow guiding portion. The two flow guiding protrusions are disposed oppositely and extend oppositely along the long sides.

Abstract: A heat gun includes a head portion defining a flow passage and including a windshield disposed at an outlet end of the flow passage. The windshield includes a first partition and a shield. The first partition has opposing first and second sides. The first side aligns a first phantom line. The shield includes a first, second, and third through hole. The first through hole is located on a right side of the first phantom line. The second through hole is located on a left side of the first phantom line. The third hole includes a portion located on the right side of the first phantom line and a portion located on the left side of the first phantom line.

Abstract: A metallic wick includes at least one mesh member having first and second ends disposed opposite to each other, first and second surfaces respectively extended from the first end to the second end thereof and arranged opposite to each other, a plurality of meshes penetrating the first and second surfaces between the first and second ends thereof; and a transport channel extending from the first end to the second end thereof and drawing fuel by capillary action.

Abstract: A burner includes a base and a combustion tray, wherein the base has an inlet pipe and two horn-shaped tubes. The horn-shaped tubes are connected to opposite sides of the inlet pipe, wherein each of the horn-shaped tubes respectively has a first section. A length of the first sections is no less than an inner diameter of the inlet pipe at where the horn-shaped tubes are connected to. The combustion tray is engaged with the base, and communicates with the horn-shaped tubes. Whereby, gas and air could be fully mixed while flowing through each of the first sections. The symmetrical horn-shaped tubes could direct the airflow to the combustion tray, where the airflow could be outputted from flame vents of the combustion tray, whereby to generate more even flame, and to enhance the heating efficiency.

Abstract: A combustor is provided, including a pipe and a burner tray. The pipe is transverse U-shaped, including a first pipe section and a second pipe section. The first pipe section has an inlet, and the second pipe section has an outlet extending along an axial direction thereof. The second pipe section has at least one reduced section, wherein a smallest sectional area in the reduced section is smaller than sectional areas on both sides of the reduced section. The burner tray is connected to the second pipe section, provided over the outlet, and has a plurality of flame holes which communicate with the outlet. Whereby, with the reduced section, the flow including gas could be evenly delivered to the burner tray. As a result, after the gas exhausted through the flame holes is ignited, the combustion range would be evener, which enhances the combustion efficiency.

Abstract: A metallic wick includes at least one mesh member having first and second ends disposed opposite to each other, first and second surfaces respectively extended from the first end to the second end thereof and arranged opposite to each other, a plurality of meshes penetrating the first and second surfaces between the first and second ends thereof, and a transport channel extending from the first end to the second end thereof and drawing fuel by capillary action.

Abstract: A gas fireplace includes a furnace, a burner, and an air guiding device, wherein the air guiding device divides an inside of the furnace into a first chamber and a second chamber; the burner is provided in the second chamber; an air outlet of the furnace communicates with the first chamber; the air guiding device has a passageway communicating the first chamber and the second chamber, wherein a width of the passageway gradually narrows from the second chamber to the first chamber. Whereby, the hot air generated while the burner is burning gas enters the first chamber from the second chamber through the air guiding device, and then can be smoothly exhausted to outside.

Abstract: A safe gas flame device providing more visible flames includes a burner having an air inlet end and a flame exit. The combustion end is configured to include a horizontal section of a fluid transporting tube. A fluid guiding device connects to the burner and includes at least one first and at least one second supporting structures disposed on opposite sides of the fluid transporting tube, a plurality of first fluid guiding members connecting and extending transversely to the at least one first supporting structure and arranged side by side along a length of the at least one first supporting structure, and a plurality of second fluid guiding members connecting and extending transversely to the at least one second supporting structure and arranged side by side along a length of the at least one second supporting structure.

Abstract: An adjustable vortex flame device includes a control head delimiting a through hole with an opening and including a flow guiding mechanism including a plurality of vanes and a flow control head inserting in the through hole. The flow control head includes a first member and a second member detachably engaging with each other and delimiting a first chamber and a second chamber connecting to each other. The two channels extend in the first member and to an outer periphery of the flow control head and connect to the first chamber. The flow control head has two flow outlets defined at distal ends of the two channels and a flow inlet defined at a distal end of the second chamber. A hollow and transparent shield is disposed above the control head and delimits a space fluidly connecting to the through hole.

Abstract: A safe combustion device includes a housing. A wick is disposed in the housing. The wick has a top end at a first distance from a bottom surface of the housing. A guiding device is connected to the housing and includes at least one shade. The at least one shade has bottom and top sides at second and third distances from the bottom surface of the housing respectively. The second distance is shorter than the first distance. The first distance is shorter than the third distance. The at least one shade has an inner lateral side adjacent to the wick. The at least one shade and the housing include a flow passage formed therebetween.

Abstract: A roasting machine is provided, including a base, a heating device, a body, and a flow guiding device. The heating device is received inside the base to generate a hot air flow. The main body is provided on the base, and has a roasting room and a flow passageway, wherein the flow passageway communicates with the heating device. The flow guiding device includes a first diversion block and a plurality of guide vanes, wherein the first diversion block is received inside the roasting room; the guide vanes are received inside the flow passageway and under the first diversion block. Each of the guide vanes is inclined, and the guide vanes surround around an axis which passes through the center of the first diversion block. Whereby, the flow guiding device is capable of changing the flowing direction of the hot air flow to effectively stir the ingredients in the roasting room.

Abstract: A vortex flame device includes a flow guiding mechanism integrated from two half flow guiding mechanisms and with which a fuel reservoir is adapted to connect. Each half flow guiding mechanism includes a wall. The walls are engaged together in a manner movable relative to each other, and each includes a plurality of vanes mounted thereon. Two adjacent vanes include a spiral air passage formed therebetween and in communication with the channel. The two half flow guiding mechanisms selectively change to a first position including a gap between free ends thereof and a second position with the free ends thereof joined. Further, a combustion head is disposed in the channel and has at least one outlet hole that fuel of the connected fuel reservoir flows through. Further, a shield is disposed above the flow guiding mechanism.

Abstract: A gas fireplace includes a firebox, a translucent cover provided on the firebox, and a separate assembly. The separate assembly is provided in the firebox, and divides the firebox into an air chamber and a combustion chamber which corresponds to the translucent cover. An exhaust passage is formed between the separate assembly and the translucent cover, and communicates the air chamber and the combustion chamber, wherein an inner width of the exhaust passage gradually reduces from the air chamber toward the combustion chamber. During the combustion, the exhaust passage guides cold air to flow through the semi-enclosed air chamber, and to evenly blow into the translucent cover, which forms an even air curtain on a surface of a bottom portion of the translucent cover to block out the heat. Whereby, the temperature of the translucent cover and the bottom portion of the combustion chamber could be lowered.

Abstract: A gas fireplace includes a furnace, a burner, and an air guiding device, wherein the air guiding device divides an inside of the furnace into a first chamber and a second chamber; the burner is provided in the second chamber; an air outlet of the furnace communicates with the first chamber; the air guiding device has a passageway communicating the first chamber and the second chamber, wherein a width of the passageway gradually narrows from the second chamber to the first chamber. Whereby, the hot air generated while the burner is burning gas enters the first chamber from the second chamber through the air guiding device, and then can be smoothly exhausted to outside.