摘要:
An electrodeless discharge lamp has a magnetic core 3, an induction coil 5, and a fixation member 7. The fixation member 7 has an elongation portion 7b extending in a direction along an axial line of the magnetic core 3, a holding portion 7c for holding the magnetic core 3 positioned closer to the magnetic core 3 than the elongation portion 7b, and hook portions 7d and 7e to which a winding wire 7 is hooked so as to be inflected. The hook portions 7d and 7e positioned away from a boundary between the holding portion 7c and magnetic core 3 toward the elongation portion 7b by a distance between once and twice of a diameter of the winding wire.
摘要:
A discharge lamp operating apparatus or a compact self-ballasted fluorescent lamp includes: an AC/DC conversion unit 5 for converting an alternating voltage phase-controlled by a dimmer 2 into a direct current voltage; a DC/AC conversion unit 6 for converting an output from the AC/DC conversion unit 5 into a high frequency voltage and applying the high frequency voltage to a discharge lamp, whereby the discharge lamp is intermittently operated; and a dimming control unit 7 which generates a dimming instruction signal for driving the DC/AC conversion unit 6 so that the discharge lamp performs an intermittent operation and outputs the dimming instruction signal to the DC/AC conversion unit via a photocoupler 9, and synchronizes the timings of turn-ON and turn OFF of the phase-controlled voltage with the timings of turn-ON and turn OFF of an operation of the DC/AC conversion unit 6, respectively.
摘要:
The invention provides a self-ballasted fluorescent lamp provided with a function for operating normally when the self-ballasted fluorescent lamp is inadvertently connected to a lighting fixture provided with a light bulb dimmer if the dimmer is at the maximum level, and with a function for reliably stopping operation of the ballast circuit if the dimmer is in a dimmed state and thereby latch the lamp in an unlit state and protect the ballast circuit. Even if the self-ballasted fluorescent lamp is connected to a power source via a light bulb dimmer, when a current detected by a current detection circuit exceeds a predetermined current value, a stop circuit stops operation of an inverter circuit and latches it in that stopped state in order to maintain the self-ballasted fluorescent lamp in an unlit state.
摘要:
A ballast for a discharge lamp includes a fluorescent lamp, an AC/DC conversion portion, a dimming control portion, and a DC/AC conversion portion. The AC/DC conversion portion converts a phase-controlled input AC voltage to a DC voltage. The dimming control portion calculates a dimming control signal from the input AC voltage. The DC/AC conversion portion converts the DC voltage from the AC/DC conversion portion to a high frequency AC voltage to be applied to the fluorescent lamp and lights and dims the lamp in response to the dimming control signal. The DC/AC conversion portion has a first operation mode for maintaining the lighting of the fluorescent lamp and for lighting and dimming the same and a second operation mode for supplying the fluorescent lamp with a voltage lower than the starting voltage of the lamp in its non-operating state. The conducting period of the phase-controlled AC voltage can be detected even in the non-operating state of the fluorescent lamp so as to restart the lamp.
摘要:
Provided is a heat medium heating unit comprising a plurality of flat heat exchange tubes, PTC heaters incorporated between flat tube portions, a heat exchanger pressing member that presses from one side the flat tubes and the PTC heaters against the inner surface of a casing, and a control board that is disposed above the heat exchanger pressing member and that controls the PTC heaters. A terminal extending upwards from an electrode plate directly connects to a terminal supports of the control board. On an inner surface of the casing, since a positioning means that engages with the terminal to position the terminal and the plate, the thermal contact resistance between the flat heat exchanger tubes and the PTC heaters is reduced.
摘要:
Provided are a layered heat exchanger that can prevent deterioration of sealing property due to deformation of sealing portions of inlet and outlet header sections when a PTC heater is sandwiched between flat heat exchanger tubes, and is pressed to be brought into close contact with the flat heat exchanger tubes, and a heat medium heating apparatus and a vehicle air-conditioning apparatus using the layered heat exchanger.
摘要:
A damper is provided to suppress the abnormal noise or air noise at the small opening of the damper. The damper includes a wall surface which forms an air flow passage, a stationary portion which extends from the wall surface to the center of a flow passage, and a rotating portion rotatably disposed in the flow passage, having one end in contact with a portion of the stationary portion at a downstream side of an air flow through the flow passage. A curved wall portion as a convex curved surface protruding to the center of the flow passage is formed on a position of the wall surface on which the air flow passing between the one end and the stationary portion impinges.
摘要:
A plurality of display electrode pairs are divided into two display electrode pair groups I and II. One field is divided into M (M is an integer of 2 or more) sub-fields SFL (L=1 to M) each including a wall voltage adjusting period, an address period, and a sustain period. Based on a sustain period T1 of a K-th sub-field SFK and a wall voltage adjusting period T2 positioned between the sustain period T1 and the address period of a (K+1)-th sub-field, if T1>T2, a first driving method in which the sustain period T1 and the wall voltage adjusting period T2 are set for each of the display electrode pair groups I and II is used in the sub-field SFK, and if T1
摘要:
A dielectric barrier discharge lamp lighting apparatus includes a plurality of dielectric barrier discharge lamps each of which includes an internal electrode sealed at one end, an external electrode arranged outside of a discharge space of the dielectric barrier discharge lamps, and a ballast circuit for applying a high voltage at high frequency between the internal electrode and the external electrode to operate the plurality of dielectric barrier discharge lamps. The plurality of lamps are arranged in parallel, and arranged so that the position of the internal electrode of each dielectric barrier discharge lamp is at different side in the adjacent dielectric barrier discharge lamps, and at the same sides in every other dielectric barrier discharge lamp. The ballast circuit applies voltages at high frequency with difference in phase to adjacent dielectric barrier discharge lamps.
摘要:
An electrodeless discharge lamp is disclosed that comprises a bulb with a substance for electric discharge sealed therein, the bulb having a reentrant portion protruding inwardly along a Z-axis direction; an induction coil arranged in the reentrant portion, the induction coil having a magnetic core and a winding wound around the magnetic core; and a drive circuit for supplying the induction coil with a power from 50 kHz to 1 MHz. The bulb has an outer diameter from 65 mm to 75 mm in a direction orthogonal to the Z-axis direction, and the magnetic core has a length L in the Z-axis direction that is 1.05 times or more a length L′ of the winding in the Z-axis direction, the length L being set to 41 mm or less.