CN2077588U

CN2077588U - Energy-saving switch of ceramic resistor with positive temp. coefficient

Info

Publication number: CN2077588U
Application number: CN 90203597
Authority: CN
Inventors: 罗光荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-26
Filing date: 1990-03-26
Publication date: 1991-05-22
Also published as: CN2078944U

Abstract

The utility model relates to an electricity saving switch of ceramic resistors with positive temperature coefficient (PTC), which comprises a on-off switch and two current limiting element which are connected with the on-off switch in series, wherein, the on-off switch is composed of a single-pole single-throw switch K1 and a single-pole double-throw switch K2; two stationary contacts of the K2 are respectively connected with one end of the current limiting element R1 and one end of the current limiting element R2, and the other ends of the two elements are connected together and are connected to stationary contacts of the K1; movable contacts of the K1 are connected to a phase line L of power supply; movable contacts of the K2 are connected to loads; the current limiting elements are PTC ceramic resistors. The switch is used for controlling stair lamps in a building. After the switch is pressed to light the lamps for 5 minutes to 10 minutes, the lamps can be automatically off.

Description

Energy-saving switch of ceramic resistor with positive temp. coefficient

The utility model relates to the device of electrical energy saving and current-limiting protection in the electrical technology field, particularly relates to the switch that limits loop current with positive temperature coefficient (PTC) ceramic resistor.

At present used light switch is the controlling electric device that opens and closes circuit merely, stair and to walk wide illuminating lamp therefore kept burning day and night whole night, waste electric power, unnecessary consumption bulb.

A kind of switch with overload prevention function and electrical energy saving but being to avoid above-mentioned weak point of the prior art, the purpose of this utility model is provided.

Purpose of the present invention can reach by following measure: with an on-off switch, can be wall type, see Fig. 2, two current limiting elements of connecting come control load, for example control the stair light of a residential building.As shown in Figure 1, this on-off switch is made up of single-pole single-throw switch (SPST) K1 and single-pole double-throw switch (SPDT) K2, two fixed contacts of K2 connect the end of described current limiting element R1 and R2 respectively, the other end of this two elements links together and is connected to the fixed contact of K1 again, the moving contact of K1 then is connected to phase line of power L, and the moving contact of K2 is connected to load.Used current limiting element R1 and R2 are the PTC ceramic resistors.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the schematic circuit of the utility model battery-conserving switch;

Fig. 2 is the outline drawing of described battery-conserving switch;

Fig. 3 is the internal placement and the circuit connection diagram of described battery-conserving switch.

Be described in further detail below in conjunction with a most preferred embodiment shown in the drawings: the used current limiting element of the utility model is a kind of positive temperature coefficient ceramic resistance, be called for short PTC(Positive Temperature Coefficient), Main Ingredients and Appearance is barium titanate BaTiO ₃, resistivity 10～1 during room temperature, 000 Europe centimetre, and in the time of near temperature rises to phase inversion temperature T c, resistance value sharply increases, and amplitude of variation can reach 4～9 orders of magnitude.This material worldwide is that the seventies just obtains to develop rapidly, is mainly used in aspects such as color television set demagnetization, refrigerator startup and heating element at present at home and abroad.The utility model utilizes this electron ceramic material to make thermistor and is serially connected in the loop, described on-off switch contact, as the stair light control switch, sees Fig. 1 and Fig. 3.

Stair light is always used a lot in a building, often gone to turn-off with regard to nobody with regular tap control at present and all night kept burning day and night by bright back, this not only waste electric power and also since the small hours line voltage higher, make bulb with for a long time just not burnt out, so that stair light does not often work, and brings inconvenience to the resident.Use battery-conserving switch of the present utility model as the stair light control switch, as " mains switch " K1 that closes, stair light D promptly lights, but after 5 to 10 minutes (look ambient air temperature and different), the ceramic resistor R1 or the R2 heating that are connected in the loop reach phase inversion temperature T c, resistance value increases several orders of magnitude suddenly, so lamp D has just extinguished.As the people to go up/when going downstairs, only need stir " lamp switch " K2, the current limiting element that is serially connected in the circuit is the ceramic resistor of another cold conditions with regard to changing, its resistance value is temporarily also very little, so stair light D lights heavily again, but still just extinguished in only bright 5 to 10 minutes, thereby avoided stair light to light for a long time.

Compare with prior art, energy-saving switch of ceramic resistor with positive temp. coefficient of the present utility model is used for the control of stair in the building or passageway lighting lamp, has at least conservation of power, prolongs bulb service life and makes things convenient for the advantage such as resident.

The utility model was installed in some buildings, residential area, Shenzhen Special District Binjiang residential district nearly 1 year on probation as the stair light gauge tap: conservation of power, to save bulb obvious, and dependable performance is welcome by resident and user deeply. The used PTC ceramic resistor of most preferred embodiment of the present utility model is commercially available SEG(Shenzhen electronics group) the board product.

Claims

1, a kind of positive temperature coefficient (PTC) ceramic resistor battery-conserving switch, comprise an on-off switch and two current limiting elements of connecting with it, it is characterized in that: described on-off switch is made up of single-pole single-throw switch (SPST) K1 and single-pole double-throw switch (SPDT) K2, two fixed contacts of K2 connect the end of described current limiting element R1 and R2 respectively, the other end of this two elements links together and is connected to the fixed contact of K1 again, the moving contact of K1 then is connected to phase line of power L, and the moving contact of K2 is connected to load.

2, according to the described positive temperature coefficient ceramic resistance of claim 1 battery-conserving switch, it is characterized in that: described two current limiting element R1 and R2 are positive temperature coefficient ceramic resistance.

3, according to the described positive temperature coefficient ceramic resistance of claim 1 battery-conserving switch, it is characterized in that: described on-off switch is a Wall-type switch.