43results about How to "Reduce suffocation" patented technology

A crib safety sheet / blanket with a sheet portion having a front surface and a back surface, the back surface of the sheet portion being disposed adjacent to a mattress. A blanket is attached to the sheet portion, defining two blanket halves. Mating strips of hook and loop fastening material are attached to the two halves of the blanket, so that an infant may be placed on the blanket with the two halves of the blanket wrapped around the infant and fastened to retain the infant in a supine position. A plurality of straps extend across the bottom of the mattress, are attached to, or threaded through a spacer, and are removably secured to the side of the sheet portion with mating strips of hook and loop fastening material to retain the sheet on the mattress.

The invention relates to a synthesizing process of calcium dobesilate hydrate in pharmaceutical industry. Hydroquinone and concentrated sulfuric acid are directly sulfonated and then the sulfonated product in water solution state and calcium carbonate are neutralized to prepare the calcium dobesilate hydrate. In the synthesizing process, the operation is simplified, the industrialization cost is saved, the reaction conditions are mild, the product purity is high, the reaction end point is controllable, and the process is suitable for industrial mass production.

The invention relates to a method for early warning of infant suffocation or sudden death based on a single-stage face positioning algorithm, which belongs to the field of computer vision; it solves the current problems of preventing and alarming infant suffocation or sudden death through real-time images; its technical scheme is : Based on the Acc-Retinaface network model of the single-stage face positioning algorithm, it can predict the baby face frame, 68 face key points, and face key point occlusion information; monitor the baby face and surrounding conditions, and return the baby face image in real time. Calculate the risk value of sudden suffocation death of the current baby by the weight value of the key point of the baby's face being blocked; compare the risk value of sudden suffocation death with the set alarm threshold and risk threshold, and return the corresponding early warning signal to the terminal device. The invention recognizes the baby's face in real time and detects the occlusion of the face, and provides early warning of suffocation or sudden death of the infant, which can effectively reduce the probability of suffocation or sudden death of the infant caused by reasons such as mouth and nose occlusion, gastroesophageal reflux, and sudden infant death syndrome.

The present invention relates to a respiration guiding device which is easily installed in an air filtering mask for filtering foreign matters (such as fine dust, pathogens, viruses, and dust) contained in air, and is configured to separate an expiration path of a mask user from an inhalation path thereof, and to discharge expiration of the user to the outside, when the user wears the glasses, the exhaled air discharge path of the user is limited to the breath guide device, so that moisture contained in the exhaled air is reduced to the greatest extent so as to reduce dewing on the glasses, and the user can feel more comfortable when wearing the glasses. Pathogens, viruses or halitosis are doubly filtered in the expiration process of a user infected with or suspected to be infected with infectious diseases, so that transmission of the infectious diseases or anxiety of a third party is reduced to the maximum extent; the invention further relates to a mask system comprising the breathing guiding device.

The invention belongs to the technical field of new energy, and in particular relates to a liquefied petroleum gas with low ethanol content and a preparation method thereof. The present invention improves the combustion quality of the existing liquefied petroleum gas by uniformly adding ethanol with high oxygen content to the petroleum gas , to reduce air pollution and harm to the human body, a new type of liquefied petroleum gas with low ethanol content that is evenly mixed with ethanol and petroleum gas has been developed, and a low ethanol content has been developed by combining water bath heating evaporation with room temperature pressurized liquefaction High-efficiency preparation method of novel liquefied petroleum gas. The liquefied petroleum gas with low ethanol content has high oxygen content, high calorific value, uniform mixing of ethanol and petroleum gas, low use cost, abundant resources, high preparation efficiency, easy industrial production, uniform and complete combustion, and is environmentally friendly.

The invention discloses a horizontal and vertical air supply combined fire escape system capable of realizing a collision effect in a breathing zone and an air supply tunnel. The horizontal and vertical air supply combined fire escape system comprises static-pressure tanks, air supply pipes and smoke screens; the static-pressure tanks are arranged in the wall of the tunnel and are connected with the air supply pipes; first nozzles are arranged at lower ends of the static-pressure tanks, and second nozzles are arranged on side surfaces, which are close to the tunnel, of the static-pressure tanks; each first nozzle discharges air in the horizontal direction, and each second nozzle discharges air in the vertical downward direction; the vertical smoke screens are fixed to side walls, which are close to one side of the tunnel, of the second nozzles; lower edges of the static-pressure tanks are flush with upper edges of the smoke screens, and upper edges of the first nozzles are flush with lower edges of the second nozzles; and the air supply speed of each first nozzle is 0.3m / s, and the air supply speed of each second nozzle is 0.7m / s. The horizontal and vertical air supply combined fire escape system has the advantages that jet flows sprayed by each two corresponding nozzles are collided with each other in the breathing zone for escape personnel, so that a fire escape channel which penetrates the integral tunnel can be formed; and the tunnel excavation volume is obviously reduced, and only the static-pressure tanks need to be arranged at corners of the tunnel.

The invention discloses a collision-type respiratory zone air supply system which comprises a U-shaped smoke-blocking vertical wall, an air supply pipe and a static box. The U-shaped smoke-blocking vertical wall comprises a top plate and two side plates which are perpendicular to the top plate and which are symmetrically fixed below the top plate. The top plate and the two side plates form a semi-closed space with a downward opening. The U-shaped smoke-blocking vertical wall is fixedly suspended in a channel. The static box corresponds to the U-shaped smoke-blocking vertical wall and is disposed at the bottom of the channel. The static box is connected with the air supply pipe which is connected with a fan. The upper end of the static box is provided with a second spout and a first spout. The spouts are symmetrically disposed in relation to the U-shaped smoke-blocking vertical wall. Outgoing air from the first spout and outgoing air from the second spout form an included angle and intersect at the lower end of the U-shaped smoke-blocking vertical wall. Both the first and second spouts supply air at the speed of 0.5m / s. The collision-type respiratory zone air supply system guarantees an effective escape channel to be formed in the channel, only the static box is required to be set at a corner of the channel, and excavated volume of the channel is reduced evidently.