297results about How to "Protect the safety of use" patented technology

The invention discloses an air conditioner monitoring method, device and system. The system comprises an acquisition device, a controller and a cloud server, the acquisition device is used for acquiring operational data of an air conditioner in real time, the controller is connected with the acquisition device and used for collecting the operational data and sending the operational data to the cloud server, the cloud server is connected with the controller and used for determining the operating state of the air conditioner and generating diagnosis data corresponding to the operating state of the air conditioner, wherein the diagnosis data include descriptive data of the operating state of the air conditioner. By the method, device and system, the problem that the operating state of the air conditioner using the flammable refrigerant cannot be monitored in real time in the prior art is solved, and the operating state of the air conditioner is monitored and diagnosed in real time.

The invention relates to the field of heating of small household electrical appliances and specifically relates to a pressure relief structure. The pressure relief structure comprises a kettle lid structure and a cavity, wherein a water outlet is arranged on the kettle lid structure, the kettle lid structure is buckled above the cavity, and a water outlet valve structure for opening and closing a connecting channel between the water outlet and the cavity is arranged in the kettle lid structure. The pressure relief structure is characterized in that a first pressure relief hole for exhausting steam is formed in the kettle lid structure, and an elastic covering piece is arranged on the first pressure relief hole; when the elastic covering piece is jacked up by high-pressure steam in the cavity, a gap is formed between the first pressure relief hole and the elastic covering piece, and the gap can communicate the cavity with the outer atmosphere; and when air pressure in the cavity is lower and can not jack up the elastic covering piece, the first pressure relief hole is covered, and the cavity can not be communicated with the outer atmosphere through the first pressure relief hole. The pressure relief structure has the advantages of simplicity, safety, reliability and double protection in use of a user.

The invention relates to a microwave leakage prevention device for a microwave oven. The microwave oven comprises a high-frequency microwave generator, an oven body having a cooking room and an oven door for opening and closing an entrance of the cooking room. A front plate used for limiting the appearance of the entrance is arranged at the entrance of the cooking room of the oven body. The oven door comprises a contact part which is arranged to be opposite to a corresponding part of the front plate of the oven body and can fit with the corresponding part of the front plate when the oven door is closed. The invention is characterized in that the microwave leakage prevention device comprises a boss-type microwave obstruction structure which extends along the vertical direction of a binding face of the contact part and the corresponding part of the front plate of the oven body, has the consistent appearance with the entrance of the cooking room, has a height high enough to block or reflect microwave leaking from a gap between the oven door and the oven body and is prepared from a material that microwave cannot pass through. According to the invention, the amount of leaked microwave is greatly reduced, and use security of human body is effectively guaranteed.

The invention relates to a multilayer protective low-smoke zero-halogen flame retardant fireproof control cable and a manufacture method thereof and belongs to the technical field of control cable manufacture. The technical scheme is that a fireproof mica layer (2) and a crosslinked polyethylene insulating layer (3) are sequentially arranged outside a copper conductor (1), and a polyester film wrapping belt (4), a metal shielding layer (5), an inner protective layer I (6), an inner protective layer II (7), an inner protective layer III (8), a metal armor layer (9) and an outer protective layer (10) are sequentially arranged outside the cable. The method adopts an aluminum belt embossing and double layer coextrusion mode, improves working efficiency and improves the quality of longitudinal wrapped aluminum tapes and extruded nylon. The cable adopts the 105 DEG C irradiation crosslinked polyethylene insulating layer, the temperature resisting level of the cable is improved, the mechanical performance of the cable is good, the tangent value of dielectric constant and dielectric loss angle is small, and the insulating electrical performance is excellent. Water or moist can be effectively prevented from entering the cable by adopting the embossing longitudinal wrapped aluminum tapes, simultaneously the cable has good shielding effect, the bending performance of the cable is ensured, and installation and using of the cable are facilitated.

The invention discloses an elevator access control system and method based on NFC technology, including an intelligent terminal, a card reader, an elevator control host and an elevator controller, wherein: the intelligent terminal has a built-in NFC module, and the identity information is transmitted through NFC communication Feedback to the card reader; the card reader feeds back the obtained identity information to the elevator control host; the elevator control host is used to: respond to the identity information and verify the identity in the card reading mode information, after the verification is passed, the authority of the corresponding user is confirmed, so that the corresponding elevator can be controlled by the elevator controller according to the corresponding authority. The elevator access control system of the present invention has the characteristics of safety, reliability, and convenient operation, and can effectively read the user identity information in the intelligent terminal with NFC function, which is convenient for managers to control the elevator; and only authorized users can use the elevator, strengthening The management and safety of elevator use have been improved.

The invention discloses an unmanned aerial vehicle intelligent charger. The unmanned aerial vehicle intelligent charger comprises an AC / DC unit, a DC / DC unit, a microprocessor, a balance charging module, a battery module, a battery module voltage detection unit, a USB power supply unit, a USB output charging jack, a voltage / current sensor, a keyboard, a display unit, a heat dissipation fan driving unit, a heat dissipation fan, a wifi unit, a USB interface, an isolated type communication interface chip and a thermistor sensor. Since an active balancing technology is employed, the charging efficiency and the charging speed are improved, and the service life and the safety of a lithium battery are effectively protected; the microprocessor is provided with the USB interface and supports program updating of hardware with a USB port or an SD card; the microprocessor is connected with the WIFI unit so as to realize such functions as real-time monitoring of a client through an mobile phone APP and the like; the microprocessor unit automatically adjusts and controls the size of DC / DC output signals according to the DC / DC output signals detected by the voltage and current sensor; by use of the isolated type communication interface chip, EMI (electromagnetic interference) is reduced, and the wiring length and the signal-to-noise performance of a system are greatly improved; and by use of the battery module voltage detection unit, each independent battery in the battery module can be monitored, and each battery is effectively controlled.

The invention discloses mountain region natural disaster monitoring and early warning vibration triggering type time efficiency monitoring equipment. The equipment comprises a placement external shell; the bottom of an inner cavity of the placement external shell is fixedly connected with a protection adjusting mechanism; a vibration triggering mechanism is fixedly connected to the middle positionof the top of the protection adjusting mechanism; an electromagnetic current trigger is fixedly connected to the bottom of an inner cavity of the spherical protective shell; a metal coil is arrangedon the inner surface of the inner cavity of the spherical protective shell; a permanent magnet ball is arranged at the bottom of an inner cavity of a protective inner ball; and an impact force detection plate is fixedly connected to the side, away from a limiting plate, of a supporting column. The invention relates to the technical field of natural disaster prevention. The whole structure is adjustable, effective protection is carried out based on the underground, biological damage to equipment and disposable use are avoided, the occurrence duration and width can be monitored through electromagnetic intermittent triggering so that the safety of personnel and assets can be estimated and protected more accurately, multiple different natural disasters can be monitored, and the application range can be widened.