1459results about How to "Electric shock prevention" patented technology

The invention provides an electric water heater. The electric water heater comprises a controller, an electric heating device and a water tank. The electric heating device is arranged in the water tank. The electric heating device comprises a left pipe box, a right pipe box and floating pipe coils. The floating pipe coils communicate with the left pipe box and the right pipe box to form sealed circulation of heating fluid. The left pipe box, the right pipe box and the floating pipe coils are filled with the heating fluid. One or more floating pipe coils are arranged. Each floating pipe coil comprises multiple arc-shaped pipe bundles. The center lines of the multiple pipe bundles are arcs of concentric circles. The end portions of the adjacent pipe bundles communicate so that the end portions of the pipe bundles can form free ends of the pipe bundles. The concentric circles are circles with the center of the left pipe box as the circle centers. The pipe diameter of the left pipe box is larger than the pipe diameter of the right pipe box. A first electric heater is arranged in the left pipe box. A second electric heater is arranged in the right pipe box. The first electric heater and the second electric heater are in data connection with the controller. The controller determines the ratio of the heating power of the first electric heater to the heating power of the second electric heater according to the pipe diameter of the left pipe box and the pipe diameter of the right pipe box. According to the electric water heater, automatic distribution of the heating power is achieved through the controller, energy is saved, and intellectualization of the water heater is improved.

The invention discloses a safe light emitting diode (LED) lighting tube, comprising a radiating shell, a lampshade, end covers, a circuit board, an LED bulb, two groups of contact pins and a driving part. The end covers are positioned at two ends of the radiating shell and the lampshade, the circuit board is fixedly connected with the radiating shell, the LED bulb is positioned on the circuit board, the two groups of contact pins are arranged on the two end covers, the driving part is respectively connected with the circuit board, and a protective switch is respectively arranged on a circuit between the driving part and the two groups of contact pins. By adopting the structure, whether a user inserts the contact pins into the high-voltage end of a lampholder or not, the commercial power supply is electrically connected with the driving part only if the two groups of contact pins are all installed in the lampholder and then the protective switch is started, therefore, potential danger existing in the installation process can be thoroughly eliminated.

The invention provides an overheat detecting electric water heater which comprises a controller, an electric heating device and a water box, wherein the electric heating device is arranged in the water box; an electric heater comprises a left tube box, a right tube box and a heat exchange tube for communicating the left tube box with the right tube box; the electric heater is arranged in the left tube box and/or the right tube box; the heat exchange tube, the left tube box and the right tube box form a heating fluid closed cycle; a pressure sensor is also arranged on the electric heating device, and is used for detecting pressure in the electric heating device; the electric heating device and the pressure sensor are connected with the controller in a data manner; the controller judges whether a temperature is overheated or not according to the detected pressure to automatically control the running of the electric water heater; the controller is connected with a cloud server; the cloud server is connected with a water heater client, wherein the controller transmits measured pressure data to the cloud server, and afterwards, transmits the measured pressure data to the client through the cloud server; the client is a mobile phone; an APP program is installed in the mobile phone; a user can obtain the pressure data through the client. The intelligent overheat detecting electric water heater can intelligently detect the overheat of a heating device of a water heater, moreover, carries out intelligent control, and improves safety.

RF energy for skin conditioning with a non-ablative electrode is applied with a handpiece incorporating means to prevent electrical shock to the patient when the energized electrode surface makes or breaks contact with the skin. In a preferred embodiment, switch means are incorporated in the handpiece and configured such that the active electrode surface is not energized until it is in actual contact with the patient's skin, and remains energized only while the active electrode surface remains in contact with the patient's skin, so that no voltage is present on the electrode, when an air gap whose dielectric breakdown can cause an electrical shock to the patient arises, immediately before or immediately after skin contact during a skin conditioning procedure. In another preferred embodiment, the electrode to skin impedance change as the electrode touches the skin is used to activate a switch that transfers RF to the electrode.

The invention discloses an intelligent electric-shock protection socket based on pyroelectric infrared detection, which comprises a casing and jack groups arranged on the casing, each jack group comprises a live wire jack and a zero line jack; the socket also comprises a pyroelectric infrared sensor, a detection switch, a relay output module, a control module and a power supply module; wherein, the pyroelectric infrared sensor is used for detecting the human existence information around the socket; the detection switch is used for detecting the plug insertion information of the jack groups; one end of the relay output module is connected with the control module, the other two ends thereof are respectively connected with the live wire jacks and the zero line jacks of the jack groups; the control module is used for receiving and processing the human existence and plug insertion information, when the plugs are inserted into the live wires and the zero lines of the jack groups at the same time, and no human is around the socket, the control module controls the relay output module to switch on the power supply, otherwise controls the relay output module to cut off the power supply of the jack groups; and the power supply module is connected with all modules and devices. Thereby, the invention can avoid electric shock accidents and guarantees personal safety.

A tamper-resistant electrical receptacle disclosed herein includes a cover assembly having at least one pair of apertures, a cover, and at least one slider that rests in the cover behind one pair of the apertures. The slider is held in a first position where it covers both apertures such that an object is blocked from entrance in either aperture and, thereby, blocked from accessing either receptacle terminal formed in the base assembly connected to the cover assembly. This first position is maintained until prongs are substantially inserted simultaneously into the apertures causing the slider to move into a second position where the prongs are enabled to pass through the apertures, engaging the receptacle terminals. After the prongs are removed from the receptacle terminals, the slider automatically retracts to the first position. When only one aperture is probed by an object, however, the slider remains confined in the first position.

A tamper-resistant electrical receptacle includes a cover defining a set of cover apertures; and a slider defining an aperture therein and being movable between a first position blocking the set of cover apertures and a second position not blocking the set of cover apertures, wherein when an object probes at least one and fewer than all of the set of cover apertures, the slider is constrained in the first position. When a set of prongs is inserted simultaneously through the set of cover apertures, the prongs contact a slider surface that is oriented substantially orthogonal to a longitudinal axis of the set of prongs such that the slider is urged from the first to the second position. When in the second position the slider aperture aligns with at least one of the set of cover apertures to enable the set of prongs to contact the receptacle contacts.

The present invention is generally directed to a system, device and method for removing a layer of sediment formed on the bottom of a pond. A submersible vacuum unit associated with in-line import and export sections made from at least 2 inch diameter tubing is supported by a single ski or wheel that is in contact with the pond bottom surface, with a flexible hose connected to the export and directed outside the pond for disposal or filtering of suctioned water. In certain embodiments, leaf /debris bagging mechanisms or mulching mechanisms are employed to facilitate removal of large debris from pond bottoms, while fine silt material is contained in a region and suctioned off the bottom surface.

The invention provides a steam generator. The steam generator comprises a furnace body, a water tank and a water pump, wherein electric heating devices are arranged in the furnace body, a steam outlet pipeline is arranged on the upper portion of the furnace body, and the water tank is provided with an inlet pipeline; the steam outlet pipeline is provided with a flow sensor used for measuring the steam flow generated in the unit time, and the flow sensor and the electric heating devices are in data connection with a controller; the controller is connected with a cloud server, the cloud server is connected with a client side, and the controller transmits steam flow data measured in the unit time to the cloud server and then transmits the steam flow data to the client side through the cloud server, wherein a mobile phone is adopted as the client side, an APP program is installed in the mobile phone, a user can select an automatic control working mode or a manual control working mode on the client side, and the controller controls the heating power of the electric heating devices according to the working mode selected by the customer. According to the steam generator, running of the steam generator is monitored through the mobile phone APP, and intelligent control over remote monitoring of the steam generator is achieved.

The invention discloses an active non-contact control method of a water heater. The water heater comprises a water heater body, a multi-stage heating mode controller in the water heater body, a human body infrared induction module and a human body infrared receiving module, wherein the human body infrared receiving module is arranged on the water heater body and connected with a control circuit inside the water heater body through a wireless module or a serial port; data are transmitted between the human body infrared induction module and the human body infrared receiving module through a wireless module or a serial port, and corresponding control instructions are received through the human body infrared receiving module and transmitted to the control circuit inside the water heater body, so that the temperature of the water heater can be controlled, and not only are the safety and the comfort degree of a human body during usage of the water heater improved, but also the service life of the water heater is prolonged.

The invention provides a steam generator. The steam generator comprises a boiler body, a water tank and a water pump, wherein the water tank is connected with the water pump through a first pipeline, the water pump is connected with the boiler body through a second pipeline, an electric heating device is arranged in the boiler body, the upper part of the boiler body is provided with a steam outlet pipeline, and the water tank is provided with an inlet pipeline. The steam generator is characterized in that a water level sensor is arranged in the boiler body, the water level sensor, the electric heater and the water pump are in data connection with a controller, the controller is connected with a cloud server, and the cloud server is connected with a client side; and measured water level data is transmitted to the cloud server by the controller and then transmitted to the client side through the cloud server, the client side is a mobile phone, an APP program is installed on the mobile phone, and the controller controls the power of the water pump according to users. According to the steam generator, the running of the steam generator is monitored through the APP of the mobile phone, water level detection is realized through remote monitoring, and intelligent control is realized on water level in the steam generator.

The invention provides a vapor generator. The vapor generator comprises a furnace body, a water tank and a water pump, wherein the water tank is connected with the water pump through a first pipeline,the water pump is connected with the furnace body through a second pipeline, an electric heating device is arranged in the furnace body, a vapor outlet pipeline is arranged on the upper part of the furnace body, and an inlet pipeline is arranged on the water tank; the electric heating device comprises a left channel, a right channel and floating coils, each floating coil comprises a plurality ofarc-shaped tube bundles, the center line of the plurality of arc-shaped tube bundles is a concentric arc, and the ends of adjacent tube bundles communicate with each other, so that the free ends of the tube bundles are formed on the ends of the tube bundles; and the concentric circle uses the center of the left channel as the center of the circle, and the diameters of the tube bundles are larger and larger as the distance to the center of the left channel is increased. According to the vapor generator, through the optimal arrangement, the heat exchange efficiency can be further improved, and the heating uniformity is increased. Experiments show that the heat exchange efficiency can be increased by 10% through the arrangement.

The present disclosure discloses an electric vehicle battery replacement system comprising a vehicle-mounted battery driving device and a battery conveying device outside of the vehicle. The vehicle-mounted battery driving device comprises a drive roller configured to carry a battery and connected with a drive motor. The battery conveying device outside of the vehicle comprises three conveying belts each connected to one of three conveying motors, respectively. The drive roller, a first conveying belt, and a second conveying belt are arranged successively on a same horizontal plane along a direction of conveying. The third conveying belt is located above the second conveying belt and connected with the first conveying belt via a sliding plate. One end of the sliding plate connects flexibly to a front end of the third conveying belt, and the other end of the sliding plate is placed on the first conveying belt. The battery replacement system provided in the present disclosure solves such problems as long charging time and low efficiency in public charging stations by using the current charging method of existing electric vehicles, and meets the growing demand of the increasing number of electric vehicles.

An insulated cable attachment device, made of an electrically insulating material, is connectable to a termination connector which is in turn connectable to a tap port for a cable television system. When an installer disconnects service to a subscriber's house, the signal is shut down to the tap port to which the subscriber drop cable is connected. The drop cable is disconnected from the tap port and a terminator connector is connected in its place on the tap port. The installer then installs the insulated cable attachment device onto the terminator connector before connecting the drop cable to the insulated cable attachment device, thereby preventing any difference in ground potentials between the terminal connector and the drop cable from being transmitted to the end of the drop cable near the house.

The invention provides a steam drier comprising a furnace body, a water tank and a water pump, the water tank is connected with the water pump through a first pipeline, the water pump is connected with the furnace body through a second pipeline, the interior of the furnace body is provided with an electric heater unit, the upper part of the furnace body is provided with a steam outlet pipeline, and the water tank is provided with an inlet pipeline. The steam drier is characterized in that the furnace body is inside provided with a pressure sensor used for measuring pressure in the furnace body; the pressure sensor and the electric heater unit are in data connection with a controller, and the controller automatically controls heating power of the electric heater unit according to the pressure measured by the pressure sensor. According to the invention, intelligent control of the heating power of the electric heater unit in the steam drier is achieved through pressure detection, and therefore stable pressure is maintained, the outgassing rate is guaranteed, and the intellectualization degree is improved.

A method of preventing an overload current from a power supply to a load through a ground fault circuit interrupter includes the steps of: obtaining an interrupted fault current from a hot wire to a ground wire via a first zero-phase current inductor and a fault current from a neutral wire to the ground wire via a second zero-phase current inductor; amplifying a signal of the fault current by an Op-Amp; and determining the fault current by a programmable control module, wherein when the fault current is larger than a preset threshold, the programmable control module sends a control signal to a control switch such that the control switch electrifies a second coil of a trip breaker to drive an armature at an unlocked position, so as to separate a movable terminal with a fixed terminal for electrically disconnecting the load with the power supply.

A novel safety protection power strip comprises a power strip shell (3). The lower part of the power strip shell (3) is connected in a buckling mode with a bottom plate (10). The outer wall of the power strip shell (3) is provided with a jack (2). A limiting block (4) is fixed to the inner wall of the power strip shell (3). Connection supporting blocks (8) are fixed to the power strip shell (3) through screws (1). The connection supporting blocks (8) are connected with a sliding block (5) through sliding rods (7). A compression spring (6) is sheathed on each sliding rod (7). Binding posts (9) are arranged on the inner wall of the bottom plate (10). The novel safety protection power strip has the advantages that improvement is made on the basis of the existing power strip structure, and a safety protection device is added; when the power strip is not in use, electric shock can be effectively prevented; when the power strip is in use, potential security problems, for example, a plug is easy to fall off, can be effectively avoided; and the slope design of the sliding block enables a plug to be easily plugged into the jack, and the power strip has good usability.

The invention relates to a self-adaptive device and method for controlling the load of a nerve and muscle stimulator, in particular to a device and a method for monitoring and outputting the electrode load of a medical nerve and muscle stimulator in real time so as to prevent the load of the nerve and muscle stimulator from being subjected to open circuit and generating a high voltage to cause electric shock to a patient or user when the nerve and muscle stimulator is in use. The device comprises an output spigot, a load sensor, an isolation outputting module, an isolation back-feeding module, a main control chip, a display unit and a sound unit. The main control chip is provided with a data processing module, a display mode generating module and a display outputting module. The isolation outputting module is connected with the data processing module arranged in the main control chip through an electronic circuit board and is also connected with the output spigot through the load sensor. The data processing module arranged in the main control chip is connected with the display outputting module through the display mode generating module. The displaying unit and the sound unit are connected with the display outputting module.

The invention relates to an electric energy meter connection terminal kit which is simple in structure, safe, reliable and capable of realizing uninterrupted-power installation and replacement of electric energy meters. According to the technical scheme for solving the technical problems, the electric energy meter connection terminal kit comprises a base, two live wire connection terminals and two neutral wire connection terminals, the live wire connection terminals and the neutral wire connection terminals are installed on the base, a live wire ingoing terminal, a live wire outgoing terminal and a neutral wire outgoing terminal are installed on the front face of the base, the live wire connection terminal corresponding to a live wire ingoing terminal of an electric energy meter is electrically connected with a supply-terminal live wire, the live wire connection terminal corresponding to a live wire outgoing terminal of the electric energy meter is electrically connected with the live wire outgoing terminal, the neutral wire connection terminal corresponding to a neutral wire ingoing terminal of the electric energy meter is connected with a neutral wire ingoing terminal, and the neutral wire connection terminal corresponding to a neutral wire outgoing terminal of the electric energy meter is electrically connected with the neutral wire outgoing terminal. A support and an upper cover are installed on the front face of the base, and the support is provided with a live wire connection copper piece and a neutral wire connection copper piece. The electric energy meter connection terminal kit is used for electric energy meter installation and replacement.

The invention relates to an intelligent plug and a socket for safe power use. The plug comprises a plug housing and insertion sheets. The plug housing is provided therein with a switch sliding plate and a moving block. A first baffle plate and a second baffle plate are capable of being inserted into the clamping grooves corresponding to the insertion sheets, the switch sliding plate and the moving block. The direction guide column of the moving block penetrates the electromagnetic coils. A first spring is fixed between the plug housing and the insertion sheets; a second spring is fixed between the push plate of the moving block and the plug housing; the plug housing is provided therein with a coil switch and a position limiting switch. For the conductive wire between the two insertion sheets, the two insertion sheets are connected in series with the electromagnetic coils, the coil switch and the position limiting switch. The socket comprises an insertion and connection cavity that matches the plug housing. The insertion and connection cavity is provided therein with a first socket clamping block that clamps with the sliding plate clamp on the switch sliding plate and a second socket clamping block that clamps with the operation port on the plug housing. According to the invention, in the plugging process, the sheets could automatically pop out and are collected so as to avoid electric shocks and igniting accidents. When plugged, the plug and the sockets are well fixed, providing safe and convenient use.