257results about "Ohmic-resistance heating circuits" patented technology

An electrically heated smoking system includes a shell and a replaceable mouthpiece. The shell includes an electric power supply and electric circuitry. The mouthpiece includes a liquid storage portion and a capillary wick having a first end and a second end. The first end of the wick extends into the liquid storage portion for contact with liquid therein. The mouthpiece also includes a heating element for heating the second end of the capillary wick, an air outlet, and an aerosol forming chamber between the second end of the capillary wick and the air outlet. When the shell and mouthpiece are engaged or connected, the heating element is in electrical connection with the power supply via the circuitry, and a flowpath for air is defined from at least one air inlet to the air outlet via the aerosol forming chamber. In use, liquid is transferred from the liquid storage portion towards the heating element by capillary action in the wick. Liquid at the second end of the capillary wick is vaporized by the heating element. The supersaturated vapor created, is mixed and carried in the air flow from the at least one air inlet to the aerosol forming chamber. In the aerosol forming chamber, the vapor condenses to form an aerosol, which is carried towards the air outlet.

The heater is capable of improving heat generation uniformity in a sheet feeding area while suppressing the temperature rise of a non-sheet feeding portion. Each of heat generation lines includes a plurality of heat blocks in which a plurality of heat generating resistors are electrically connected in parallel between two conductive members. The heat generation lines are arranged in a lateral direction of the substrate, and the heat blocks are arranged so that the end of the heat block in the heat generation line of a first row does not overlap with the end of the heat block in the heat generation line of a second row in a longitudinal direction of a heater.

The present specification relates to a heating element in which a heating value for each region is controlled or a heating element in which the heating value for each region is controlled and which is inconspicuous, and a method for manufacturing the same.

A portable work apparatus has a combustion engine for driving a work tool. An air/fuel mixture is supplied to the engine via a carburetor which is provided with an electrical heating element for heating to a given temperature. The heating element is connected to a switch via which electrical energy, which is provided by a generator driven by the engine, is supplied. When a given temperature is exceeded, the switch interrupts the energy supply. To achieve an exact temperature control, the ohmic resistance value of the heating element is stored in a memory in dependence on the temperature. The current flowing through the heating element and the voltage drop at the heating element are measured and the instantaneous resistance of the heating element is calculated therefrom. This calculated value is compared to the value stored in the memory to open or close the switch in dependence on the comparison.

There is provided a heater (101) for heating an aerosol-forming substrate. The heater comprises a plurality of elongate heating elements (107) arranged in an elongate array. The elongate array has a support end with a first dimension, a heating end with a second dimension and a middle portion with a third dimension. The array is arranged to heat the substrate to form an aerosol. The third dimension is greater than the first dimension and greater than the second dimension. There is also provided an electrically heated aerosol generating system including such a heater.

A voltage source converter based DC deicer and its control method are provided. The voltage source converter based DC deicer includes a connecting reactor, a modular multilevel voltage source converter based on a full H-bridge submodule, smoothing reactors, deicing disconnectors, a deicing bus, and a deicing AC line. The AC side of the modular multilevel voltage source converter is connected to an AC side bus through the connecting reactor, an isolation disconnector and a breaker. The DC side of the modular multilevel voltage source converter is connected to the deicing AC line through the smoothing reactors, the deicing disconnectors, and the deicing bus.

An aerosol generating apparatus comprises: a power source; a load configured to have a resistance value that varies according to a temperature and generate an aerosol by atomizing an aerosol source or heating a flavor source when supplied with power from the power source; a sensor configured to include a resistor connected in series to the load and output a measurement value that is a current value of a current flowing through the resistor or a voltage value of a voltage applied to the resistor; and a control unit configured to control power supply from the power source to the load and receive output from the sensor, wherein the resistor has a resistance value that is set such that responsiveness of a change in the measurement value to a change in a temperature of the resistance value belongs to a prescribed range.

The invention discloses an electronic atomization device comprising a smoke tube, a heating body assembly, an inductive switch and a reset piece. The smoke tube is used for inserting a cigarette; theheating body assembly can move in the smoke tube to turn on the inductive switch and enable a battery to supply power to the heating body assembly, and the reset piece is used for applying reset forceto the heating body assembly. According to the electronic atomization device, the inductive switch used for detecting cigarette insertion is arranged in the electronic atomization device so as to control the heating body assembly to heat, automatic detection of cigarette insertion can be achieved, the phenomenon that the heating body assembly is subjected to dry burning is avoided, and the intelligent degree of the electronic atomization device can be improved. Besides, the reset force applied to the heating body assembly by the reset piece can reset the heating body assembly after the heating body assembly emits heat, so that continuous heating of the heating body assembly can be realized only by one-time triggering, and the situation that the cigarette stops being heated due to accidental disconnection of the inductive switch in the heating process is avoided.

The invention discloses a full-automatic electric steam boiler. In a steam-water separator (82), an S-shaped fixation support (23) is used for limiting the positions of a permanent magnet (30) and a temperature-sensing magnetic body (31); and attraction and non-attraction of the temperature-sensing magnetic body (31) and the permanent magnet (30) are used for controlling opening and closing of valve core seal rings to achieve the separation of steam and water and output. The electric steam boiler is characterized in that the third valve core seal ring (17) is round and concave and is in a circular cap shape with the middle provided with a round hole (74) or a circular ring shape; the permanent magnet (30) is inserted in a suction plate (28) and magnetizes in the thickness direction; a pull rod screw (20) is radially fixed by a guide tube (26); a screw plug (5) is used for adjusting the elastic force of a spring (6); a pressure vessel (83) is made from steel tubes; a floating ball liquid level apparatus (72), the steam-water separator (82) and at least one safety valve (56) are arranged on an upper seal head (73); electric heaters (75) are arranged on a lower seal head (61); a tap water inlet tube connector (57) is arranged on one side of the lower end of a shell of the electric steam boiler for water supplementing; and the floating ball liquid level apparatus (72) is used for controlling an intermediate relay ZJ and a contactor CJ to achieve dry burning resistant protection.

The invention discloses a non-contact electronic cigarette heater and a heating control method and device of a ceramic heating element. The ceramic heating element comprises a heating body and a heating circuit, and the heating circuit is arranged on the heating body to heat air passing through a porous channel; the heating control method comprises the following steps of controlling the heating circuit to perform heating work by adopting a first working voltage when the non-contact electronic cigarette heater is started, and timing the working time of the heating circuit; detecting the workingcurrent of the heating circuit; performing voltage reduction control on the working voltage of the heating circuit according to the working time of the heating circuit and the working current of theheating circuit; and adaptively adjusting the working voltage of the heating circuit according to the change rate of the working current of the heating circuit after the voltage reduction is finished,thereby realizing an effect of heating air for cigarette smoking by controlling the working voltage of the heating circuit. The control complexity is simplified, and the better control response effect is further realized.

Disclosed is an electric heating device capable of uniformly applying an electric current to a workpiece without causing abrasion of electrodes. An electric heating device includes a pair of electrodes for applying an electric current to a workpiece, and a pair of clamps for fixing the workpiece. The electrode extends along the surface of the workpiece in a direction perpendicular to an electric current direction while maintaining a constant length in the electric current direction, and sandwiches the workpiece therein. The clamp is arranged in the vicinity of the electrode, and sandwiches a part of the workpiece other than a part to be heated therein. A pressure at which the clamp sandwiches the workpiece therein is higher than a pressure at which the electrode sandwiches the workpiece therein.

The invention relates to a heating assembly and a heating device. The heating assembly comprises a mounting base and a heating body, the heating body comprises a base body and a heating circuit, the base body is provided with a bottom surface, the heating circuit is located on the base body, the heating circuit comprises a heating part and a heating electrode electrically connected with the heating part, the heating electrode is close to the bottom surface, and the mounting base is fixedly connected with the base body; the joint of the mounting base and the base body is located on the side, close to the bottom face, of the heating electrode. The heating assembly is long in service life.

A safety circuit to disrupt power to a heating element of an appliance to be powered through a solid state switch (Tri-ac Q1), typically a triac, from an AC power source (V1) having a positive half cycle and a negative half cycle delivering power. A low resistance condition is sensed by detecting either the current through or voltage across the solid state switch during the positive half cycle and the negative half cycle of the AC power line, when the solid state AC switch is not actuated. A fault signal is generated to interrupt power to the heating element, preferably by a crowbar circuit opening a fuse, whenever the low resistance condition is detected.

The invention discloses a design method for electronic cigarettes. The electronic cigarette comprises a heating wire, a first sampling resistor and a control ship; the heating wire is used for atomizing tobacco tar to form smog; the control chip is used for controlling the current in the heating wire when the electronic cigarette starts to work according to the resistance value of the first sampling resistor; the design method comprises following steps: S11. determining the resistance value of the heating wire; S12. determining the resistance value of the first sampling resistor according to the resistance value of the heating wire; S13. electrically connecting the determined heating wire and the first sampling resistor with the control chip to design the electric cigarettes. Correspondingly, the invention also discloses a control method for electronic cigarettes and an electronic cigarette. The invention integrates the main circuit of the electronic cigarette on a control chip, expands the use range of the control chip, and greatly simplifies the design process of the electronic cigarette, is convenient for manufacturing, has high production efficiency and low production cost.

The invention relates to a heating body, a heating assembly and a heating device. The heating body comprises a base body, a heating circuit and a temperature measuring circuit, the base body is provided with a bottom face, the base body is provided with a heating area and an electrode arrangement area adjacent to the heating area, and compared with the heating area, the electrode arrangement areais close to the bottom face. The heating circuit is located on the base body and comprises a heating part and a heating electrode electrically connected with the heating part, the heating part is located in the heating area, and the heating electrode is located in the electrode setting area; the temperature measuring circuit is located on the base body, the temperature measuring circuit and the heating circuit are arranged in a spaced mode, the temperature measuring circuit comprises a temperature measuring part and a temperature measuring electrode electrically connected with the temperaturemeasuring part, and the heating area comprises a high-temperature area and a temperature measuring part high-temperature area. The deviation between the actual temperature of the heating body in the heating initial stage and the design temperature is small.

Power outputs in a heating control and/or regulation device are each electrically connectable to a heating element, especially a radiant heater. A power input is electrically connectable to a power supply for the heating elements and is connected a power distribution device that has an output connected to the power outputs via respective branches. A switching element in each branch or between each of the power outputs and the heating elements is controlled by a control and/or regulation unit as a function of required values. An interface receiving required values has at least one connection to a temperature measurement device that measures actual values of temperature that are supplied to the control and/or regulation unit which controls and/or regulates the switching state of the switching elements as a function of these actual values of the temperature.

A flash heater element includes a first surface having a central region and an electrical flow path disposed on the first surface. The electrical flow path includes a central portion disposed at least partially within the central region and a peripheral portion disposed peripherally outwardly from the central region. A width of the electrical flow path is greater within at least a portion of the central portion than within the peripheral portion.

The invention discloses a system and a method for controlling an output power of an electric heater. The system mainly comprises a collection unit, a duty ratio control unit and a thyristor control unit, which are electrically connected with one another in sequence. The method comprises the steps as follows: the collection unit collects an AC power cycle, an AC power voltage and an indoor temperature; the duty ratio control unit receives collected AC power cycle, AC power voltage and indoor temperature, obtains a first duty ratio value according to the AC power cycle, the AC power voltage and the indoor temperature, and obtains the duty ratio value of a thyristor control signal according to the first duty ratio value, the AC power voltage and the indoor temperature; and the thyristor control unit is used for receiving the duty ratio value of the thyristor control signal, and controlling opening and closing of a thyristor according to the duty ratio value of the thyristor control signal, so that the output power of the electric heater is controlled. The requirements of a user on indoor temperature stability and comfort are met by properly adjusting and reducing the output power of the electric heater.

A tankless water heater system (100), with a heat exchanger device (20) comprising at least one hollow chamber (21, 22, 23, 24 ) and at least one electrical heating element (52, 53, 54), and:

• • a controller device (30) with a temperature control unit (35), a tap event counter unit (32), a down-time counter unit (33) and a time delay unit (34);
  • an electrical switching element (41, 42, 43) for connecting or disconnecting one or several heating elements (52, 53, 54) to/from a power supply;
  • an outlet temperature sensor (27) linked with the temperature control unit (35);
  • a flow rate sensor (29);
• wherein:
  • the tap counter unit (32) is connected to the flow rate sensor (29) and is triggered when water flow rate exceeds a tap indication threshold {dot over (V)}₀
  • the down-time counter unit (33) is triggered and retriggered by the tap counter unit (32) and both provide a down-time event signal after any inactivity period with no water flow and records the duration of inactivity;
  • the time delay unit (34) is connected to and triggered by the tap counter unit (32) starting a delay period Δt_OFF which duration is switched from a short default delay period to a long delay period by the down-time signal provided by the down-time counter unit (33); and
  • the switching elements (41, 42, 53) are triggered by the time delay unit (34) only after the delay period has elapsed.

The heater control device controls an electric heater (12). The electric heater has a plurality of heating units (121, 122) producing heat by being energized, and radiating the heat from the pluralityof heating units. Current determination units (S103, S104, S105) in the heater control device determine whether or not a predetermined current limit value (AL1) is exceeded by a total energization current value (HAt), which is the value of the current for energizing the electric heater when the entirety of the plurality of heating units is energizable. If the total energization current value hasbeen determined to exceed the current limit value, the energization control units (S102, S106) of the heater control device execute a first heater control whereby the electric heater is energized while an object to be brought to an energization-disabled OFF state is being switched among some or the entirety of the plurality of heating units. If the total energization current value has been determined to be equal to or lower than the current limit value, the energization control unit executes a second heater control whereby the electric heater is energized while the entirety of the plurality ofheating units is enabled to be energized.