Abstract: A dual back suction type range hood includes a wind collecting case. An upper half part and a lower half part of a front surface of the wind collecting case have at least one horizontally extending elongated first air-extracting port and at least one horizontally extending elongated second air-extracting port, respectively. The first air-extracting port is parallel to the second air-extracting port, and the two are in communication with at least one air-extracting device. When the air-extracting device draws air, the total air flow passing through the second air-extracting port is greater than the total air flow passing through the first air-extracting port at a same time. As such, after the second air-extracting port draws most of airborne grease and fumes, the first air-extracting port extracts a very small amount of airborne grease and fumes flowing upwards, thus achieving complete fume exhaustion.

Abstract: A soot-exhausting device is provided with a left and a right upright plate. A front end of the left upright plate is bended and extended to form a first upright plate and a left deflection plate. The upper part of the free end of the left deflection plate is bended rightwardly to form a left top plate. A front end of the right upright plate is bended and extended to form a second upright plate and a right deflection plate. The upper part of the free end of the right deflection plate is bended leftwardly to form a right top plate. The bottom of the air-extraction hood is provided with a left and a right air blow groove that are respectively in elongate shape and parallel to top side of the left and the right top plate and located at the rear end of each top side.

Abstract: An exhaust device comprises an air-extraction hood and a left upright plate and a right upright plate that are respectively placed below two lateral sides of the air-extraction hood, where a first guiding part is provided at the front end of the right lateral surface of the left upright plate and a left top plate is provided between the first guiding plate and an air-extraction slot; a second guiding part is provided at the front end of the left lateral surface of the right upright plate and a right top plate is provided between the second guiding plate and the air-extraction slot; and the right top plate and the left top plate are symmetrically arranged at two sides of the bottom of the air-extraction hood. The leakage of pollutants can be prevented by means of the cooperation of the air-extraction slot and an air-blowing slot.

Abstract: The present invention provides an intelligent air curtain fume hood, which includes cabinet, inclined air curtain module, intelligent window control module and processing module. Feature of the present invention is that the inclined air curtain module is the use of inclined air flow field distribution generated during the operation of shelter in the work space, and with variable air volume theory in order to reduce the gas leaking chance to further achieve security and energy saving effect.

Abstract: A soot-exhausting device is provided with a left and a right upright plate. A front end of the left upright plate is bended and extended to form a first upright plate and a left deflection plate. The upper part of the free end of the left deflection plate is bended rightwardly to form a left top plate. A front end of the right upright plate is bended and extended to form a second upright plate and a right deflection plate. The upper part of the free end of the right deflection plate is bended leftwardly to form a right top plate. The bottom of the air-extraction hood is provided with a left and a right air blow groove that are respectively in elongate shape and parallel to top side of the left and the right top plate and located at the rear end of each top side.

Abstract: A reverse oblique air curtain exhaust cabinet comprises a cabinet that has a bottom plate and an elongate air blow slot is provided in front of the bottom plate. Through the elongate air blow slot, air is blown upward at an oblique angle toward the rear plate of the cabinet. An air-extraction hood is provided in a space defined above the bottom plate in a way of being vertically movable relative to the cabinet. The air-extraction hood has an elongate air-extraction part that is parallel to the elongate air blow slot in a way that the elongate air-extraction part is above and spaced from the elongate air blow slot toward the rear plate of the cabinet. Thereby, an oblique air curtain that flows upward is formed to remove the pollutants between the oblique air curtain and rear plate and left and right lateral plates in a more energy-saving way.

Abstract: An exhaust device having deflection plates comprises a cabinet that is provided with a space therein. An opening is formed in front of the cabinet. The air-extraction hood located at the top of the cabinet is provided at the bottom thereof with an elongate air-extraction slot facing downwards and parallel to the rear plate. A left deflection plate is vertically located in the space in a manner of being relatively oblique to the left lateral plate while a right deflection plate is vertically located in the space in a manner of being relatively oblique to the right lateral plate. Thereby, the air drawn towards the elongate air-extraction slot can flow into the cabinet via the left and the right deflection plates so as to prevent the leakage of pollutants from the opening in front of the cabinet.

Abstract: A range hood capable of resisting draft is provided above a counter on the top of which an air-generation device is located. The range hood comprises an air-extraction hood that has a bottom provided with an elongate air-extraction slot for drawing air upwards. Besides, an air blow groove is provided in front of the elongate air-extraction slot for blowing air downwards. A long left upright plate and a long right upright plate are respectively provided below the left and right lateral surfaces of the air-extraction hood. Thereby, when the elongate air-extraction slot draws in air, an oblique airflow is formed. Besides, the long left and right upright plates are able to hinder the draft coming from lateral sides, so as to protect the oblique airflow structure. Consequently, an intact upwards-flowing airflow is formed to exhaust soot and harmful gases.

Abstract: A reverse oblique air curtain exhaust cabinet comprises a cabinet that has a bottom plate and an elongate air blow slot is provided in front of the bottom plate. Through the elongate air blow slot, air is blown upward at an oblique angle toward the rear plate of the cabinet. An air-extraction hood is provided in a space defined above the bottom plate in a way of being vertically movable relative to the cabinet. The air-extraction hood has an elongate air-extraction part that is parallel to the elongate air blow slot in a way that the elongate air-extraction part is above and spaced from the elongate air blow slot toward the rear plate of the cabinet. Thereby, an oblique air curtain that flows upward is formed to remove the pollutants between the oblique air curtain and rear plate and left and right lateral plates in a more energy-saving way.

Abstract: The present invention is a push-pull ventilation hood having a push device to obtain a push air flow and a pull device to exhaust contaminant flow with an exhaust opening and the two devices properly coordinated with each other, wherein, when the push flow flows through a contaminant source, a contaminated flow of the push flow is exhausted through the exhaust opening. Based on the design process according to the present invention, a push-pull hood with the highest efficiency of push velocity can be designed and the push-pull hood can economically and effectively control the contaminant source.

Abstract: A biological safety cabinet (BSC) has an air curtain to isolate air inside and outside the BSC. A most preferable slight concave curtain of air can be obtained. With the curtain, neither contamination in the BSC leaks out nor outside contamination enters the BSC. Furthermore, no circulation is formed in the BSC by blowing the air curtain. Thus, the operator using the BSC and the product in the BSC are both well protected.

Abstract: The present invention relates to a pollutant removing device and an oblique single air curtain range hood using the device. The rear side of the range hood is adjacent to a wall and the range hood includes an air blow device and a suction device. The air blow device has an elongate air blow slot that is provided in front of a counter top and through which air is blown upward. The suction device is located above the counter top and includes an elongate suction opening that is connected with a suction machine to produce upward suction force. The elongate suction opening is parallel to the elongate air blow slot in a way that the elongate suction opening is above and spaced from the elongate air blow slot toward the wall. By means of the operation of the suction machine, an oblique air curtain that is nearly two-dimensional is formed between the elongate suction opening and the elongate air blow slot.

Abstract: A pollutant removing device includes first and second air blow devices respectively located at front and rear ends of a pollutant generation source or an oven and respectively including a first elongate air blow slot and a second elongate air blow slot so as to blow air upward. A suction device is located above a counter top to which the pollutant generation source or the oven is installed. The suction device includes at least one elongate suction opening which is connected with a suction machine. The at least one elongate suction opening is parallel to the first and the second elongate air blow slots. Two air curtains are formed between the at least one elongate suction opening and the first and second elongate air blow slots. The gas, vapor, or particulate type pollutants located between the two air curtains is sucked via the at least one elongate suction opening.

Abstract: The present invention is a fume hood capable of exhausting contaminant, having an air pipe in a sash and a suction slot corresponding to the air pipe deposed at the front rim of the bottom surface to obtain an air curtain, where contaminant is efficiently prevented from leakage and energy is saved.

Abstract: A method for removing environmental contaminants includes: blowing the environmental contaminants along a predetermined direction with a blower; and extracting the blown environmental contaminants along the predetermined direction with a ventilation device; further characterized in: the placement of a guiding side plates between the blower and the ventilation device for guiding a flow path of air flow; and operating with a low blowing force and a strong vacuum force. The present invention also provides a device for removing environmental contaminants.

Abstract: The conductive seat has parallelly arranged strip members in a bottom area of its base sealed therein with liquid, a plurality of flow channels are formed from and on the bottom of the strip members and are mutually spaced; a return area is formed between the top ends of the strip members and the lid; when the bottom of the base contacts with a heat-generating source, the liquid sealed in the base and absorbing the latent heat from the heat-generating source becomes a vapor flow flowing toward the return area to repeatedly circulate and transmit the heat, thereby the heat is rapidly and uniformly transmitted to the heat sink to further increase the effect of heat sinking.

Abstract: The present invention discloses an airflow capture booth with single-plate windbreak comprising an extracting means for extracting polluted air having an opening for air contamination extracting through and a crosswind device for simulating crosswind, the improvement comprises that said crosswind device having a single-plate windbreak perpendicular to an airflow direction of said crosswind having a specific distance to said opening of said extracting means for forming a capture zone, wherein the airflow of said capture zone is not easy to be shed and is extracted mostly by said extracting means.

Abstract: The present invention discloses an airflow capture booth with single-plate windbreak comprising an extracting means for extracting polluted air having an opening for air contamination extracting through and a crosswind device for simulating crosswind, the improvement comprises that said crosswind device having a single-plate windbreak perpendicular to an airflow direction of said crosswind having a specific distance to said opening of said extracting means for forming a capture zone, wherein the airflow of said capture zone is not easy to be shed and is extracted mostly by said extracting means.