CN1156946A - Electronic Light/Temperature Control for Floor Standing Halogen Lamps - Google Patents

Abstract

An electronic light/temperature control device for a halogen-in-place lamp includes a conventional circuit and an inventive circuit. The latter includes a DC power supply section, an electronic switching section, a light control section and a temperature control section. The action point of the light control part/temperature control part can be adjusted/reset by the user. The control of the lamp is performed automatically or manually by means of the detected information. Once the temperature of the lamp reaches a predetermined operating point, the lamp is automatically extinguished and can be turned on again manually or automatically. The lamp is automatically extinguished when any selected reference reaches a preselected brightness level, and automatically restored once the brightness level is less than a predetermined value.

Description

Electronic Light/Temperature Control for Floor Standing Halogen Lamps

The invention relates to an automatic/manual electronic control for floor lamps according to the ambient light and temperature rise of the lamp.

At present, floor-mounted halogen lamps with electronic dimmers are widely used. The basic component of this dimmer is a triac. As a result, many different control circuits have been created to match the triac. The simplest one is the common phase cut control circuit, which consists of a potentiometer, a capacitor and a trigger diode. This type of control circuit has been disclosed in Chinese patent CN94213163.0.

Now the safety standards of many countries have been raised to a very high level. Safety standards in European and North American countries have been revised to the highest level. In addition, higher power floor-mounted halogen lamps will increase the cost of electricity consumed. Thus, the entire circuit, including the triac, potentiometer, capacitor and trigger diode, has been considered a "basic circuit" and for economical and commercial reasons an additional "control circuit" must be added to control the "basic circuit". circuit".

Accordingly, many control circuits for controlling conventional triac dimmers have been disclosed. One of these is US Patent No. 4,751,433, which uses photovoltaic cells so that the luminous energy emitted from the lamp is inversely proportional to the luminous intensity of the surrounding space. Since the critical point (action point) of the control device is set by the manufacturer, the user cannot reset/adjust the device. Another published document is US Pat. No. 4,658,129, which uses a photodetector unit to send out an output voltage in response to the intensity of light. This output voltage is applied to a capacitor to operate a silicon controlled rectifier (SCR), enabling automatic lamp on/off control. However, none of these devices can pass the safety test of the temperature rise caused by the floor halogen lamp itself. This safety test is to cover the lampshade opening with two layers of gauze, and the lamp will work continuously for seven hours without fire accidents. Therefore, the above two US patents have the same disadvantages.

Simply put, if one room has light colored furniture built in with a white ceiling, and another room has dark colored furniture built in with a green ceiling, use two Floor-mounted halogen lamps are placed in the two rooms respectively, and the ambient brightness produced by them is completely different. Since the "action point" is set by the manufacturer, the user cannot make adjustments by himself. The above-mentioned automatic control device for floor-mounted halogen lamps will operate at inappropriate times in both cases.

The applicant's two prior Chinese patent applications, the invention titles of which are: <protective cover for floor-mounted halogen lamp> and <fire-resistant floor-mounted halogen lamp>, as the prior art of the present invention, have disclosed the grid on the lampshade opening How the guard is positioned and how the thermal switch/element is placed on the reflector of a floor mounted halogen lamp with a grid guard.

The object of the present invention is to improve all the above-mentioned prior art to a more perfect level, to provide a floor-mounted halogen lamp with a control device, which can be adjusted according to a predetermined ambient brightness and a predetermined temperature rise of the lamp. The base halogen lamp is controlled automatically and manually. Therefore, the base halogen lamp can be adjusted/set to any predetermined operating point by the user, and then the base halogen lamp will automatically operate at this operating point.

To achieve this object, the present invention has a device comprising two main circuits, one typical of a conventional dimmer and the other an inventive circuit for controlling the conventional dimmer according to the user's intention, The inventive circuit includes:

(1) DC power supply part, which includes:

Rectifier diode (D1), used for half-wave rectification of alternating current,

Resistor (R1) for stepping down the voltage;

A filter capacitor (C1), used to filter the rectified current,

Zener diode (Z1), used to provide a stable 6V DC voltage to the entire inventive circuit;

(2) Electronic switch part, including:

Integrated circuit IC (U1D), used as an inverter for two transistors (Q1/Q2),

Two transistors (Q1/Q2) to control the on/off of the triac,

Light-emitting diodes (LEDs) to indicate overruns in the light control section and/or temperature control section;

(3) Light control part, including:

A photoresistor (CdS) for detecting a selected ambient brightness (so-called reference brightness),

Integrated circuit IC (U1A) for the output signal voltage of the luminance detected by the photoresistor (CdS),

Potentiometer (R2) for adjusting/resetting the action point of the light control section by the user;

(4) Temperature control part, including:

Thermistor (R5), which detects the temperature rise of the lamp,

Two integrated circuits IC (U1C/U1D) are used to invert the signal level from the thermistor (R5), while the integrated circuit IC (U1A) that controls the light control part,

Potentiometer (R4) for the user to adjust/reset the operating point of the temperature control section.

Another form of electronic light/temperature control device of the present invention also includes a conventional electronic dimmer circuit and an additional inventive electronic circuit comprising:

(1) DC power supply part, which includes:

Rectifier diode (D1), used for half-wave rectification of alternating current,

Resistor (R1), used to drop the voltage,

A filter capacitor (C1), used to filter the rectified current,

A zener diode (Z1) for providing a stable 6 volt DC voltage to the entire inventive electronic circuit;

(2) Electronic switch part, including:

Integrated circuit IC (U1B), used as an inverter for two transistors (Q5/Q6),

Two transistors (Q5/Q6) for controlling on/off of the triac 4010;

(3) Light control part, including:

Photoresistor (CdS) for detecting selected ambient brightness,

Integrated circuit IC (U1A) for the output signal voltage of the luminance detected by the photoresistor (CdS),

Potentiometer (R2) for adjusting/resetting the operating point of the light control section by the user,

Light-emitting diode (LED1), used to display the overrun of the light control part;

(4) Temperature control part, including:

Transistor (Q1'), used to detect the temperature rise of the lamp,

Two integrated circuits IC (U1C/U1D) for inverting the signal level from the transistor (Q1'), while the integrated circuit IC (U1B) for controlling the electronic switching part,

Potentiometer (R4) for user to adjust/reset the operating point of the temperature control section,

Light-emitting diode (LED2), used to display the overrun of the temperature control section.

Fig. 1 is a three-dimensional schematic diagram of an existing floor-mounted halogen lamp;

Fig. 2 is the circuit diagram of an embodiment of the present invention;

Figure 3 is a schematic view of the appearance of an embodiment of the present invention;

FIG. 4 is a partial cross-sectional schematic diagram of a photodetection system according to an embodiment of the present invention;

Fig. 5 is a partial cross-sectional schematic diagram of a temperature detection system according to an embodiment of the present invention;

Figure 6 is a front view of the control board of one embodiment of the present invention; and

Fig. 7 is a circuit diagram of another embodiment of the present invention.

The present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a three-dimensional schematic diagram of a conventional floor-mounted halogen lamp, in which the floor-mounted halogen lamp has all the above-mentioned functions of the prior art. The lamp thus consists of a properly positioned grille guard G, a thermal sensor TS mounted on the reflector RF, a light sensor PS mounted on the pole ST and a pole mounted Turn off the potentiometer PM of the switch. The power of the lamp tube L mounted on the lamp holder LH among the figures is 300 watts, and a semi-cylindrical glass cover CG is placed on it.

A comparison table is used below to illustrate the difference between the present invention and the above-mentioned prior art. As can be seen from the table, even if the functions of the prior art are combined, the purpose of the present invention cannot be reached.

Comparison Chart Function prior art lamp this invention temperature control *A few of them have have Temperature Control Recovery Mode Automatic (with unnecessary on/off cycling) Manual (no unnecessary on/off cycling) action point regulation none have light control *A few of them have have light control adjustment none have Comply with safety requirements *A few of them can able *The applicant's previous lamp

Fig. 2 is a circuit diagram of an embodiment of the present invention, and the right part of the figure is a typical circuit of the prior art. Therefore, bulb L (300 watts/120 volts), filter (L1 and C3), triac 4010, trigger diode DB3, capacitor C2 (0.068 microfarads/250 volts), and potentiometer R8 (250K ) are all components of the prior art, and will not be described in detail here. If the switch SW2 in this figure is turned to the manual position M, the figure on the right becomes a traditional dimmer circuit diagram, and the light-emitting diode LED of the invented circuit is not included, but the LED can still display to the user of the light The situation detected by the light control part and the temperature control part, that is, the LED lights up when the user's set value is exceeded.

In the left part of Figure 2, from above, 120 volts alternating current (AC) is input through switch SW1, down through diode D1 (1N4004), which acts as a half-wave rectifier, and then through resistor R1 (15K/2 watts) To reduce the voltage to an acceptable level, a zener diode Z1 (6.8 volts, 1/2 watt) is connected to keep the reduced voltage at 6 volts at all times. The rectified 6V DC voltage is then passed through capacitor C1 (220uF/16V) for further waveform shaping and smoothing. The combination of resistor R1 and appliance C1 is also known as a filter, shaping a smooth DC voltage for use by other parts of the circuit. The above four elements (D1, R1, Z1, C1) constitute the DC power supply part of the present invention.

In the middle part of Fig. 2, integrated circuit IC (U1B), transistors Q1 (MPSA42)/Q2 (MPSA92) and their accessories, form the electronic switch part of the present invention. U1B (4011) acts as an inverter and controls two transistors (Q1/Q2). When the two transistors are in the off state, the potentiometer R8 has the highest voltage level, which makes the triac (4010) is turned on. When the two transistors are in the conducting state, the voltage level of the potentiometer R8 is the lowest, so that the above-mentioned switching element (4010) is turned off. The light-emitting diode LED (TLR105) is connected to the output terminal of U1B so as to display the action signal from the light control part or the temperature control part in two modes of automatic (A, AUTO) and manual (M, MANUAL). Without the indication of this LED (usually set in red), manual control cannot be performed since the user does not know what temperature has been reached.

The light control part of an embodiment of the present invention includes: a photoresistor CdS, an integrated circuit IC (U1A) and a potentiometer R2 (2K). Referring to FIG. 3 and FIG. 4, the position of the photosensor PS (ie, CdS) is clearly shown. In this embodiment, the light control system of the invention functions in such a way that the light sensor is positioned facing a reference object such as another light or the sky, or facing any object illuminated by the light or the sky or the like. R2 can be adjusted by the user to any predetermined position. In normal use, because the target is dark or not bright enough, the resistance value of the photosensitive resistor CdS is large, so the input of U1A (4011) is at low level, and the output of U1A is at high level, so the electronic switch connected. When the reference object is bright enough, the resistance value of the photoresistor CdS is small, so the input of U1A is at high level, and the output of U1A is at low level, so the electronic switch is turned off. In normal use, the light sensor must be placed in such a position that only the reference brightness (object) can affect the sensor. First, to set R2, adjust it to the maximum position, then illuminate the reference object and align the light sensor with the reference object, then adjust R2 slightly until the light control part operates. If the reference object is too bright, the fine-tuning of R2 will not respond. Therefore, it is necessary to find another object as a new reference object, which is illuminated by the above reference object. Once the reference object is darkened, the light is automatically switched on.

The temperature control part of an embodiment of the present invention includes: a thermistor R5 (SDT1000), two integrated circuits IC (U1C/U1D), a potentiometer R4 (10K) and their accessories. The installation of thermal sensors (ie thermistors) has been clearly disclosed in the applicant's previous Chinese patent applications. The difference between the prior art and the present invention lies in the circuit diagram and function. In the prior art, the user cannot make reset adjustments. But in the present invention, the potentiometer R4 can be adjusted by the user to obtain different operating points, such as 130°C, 120°C or 110°C. Also, in the prior art, the 20 minute on/off cycle continues until the user turns off the light. Whereas in the present invention, when the thermal sensor detects an unsafe temperature rise in a lamp, the lamp will remain in the off state until the user (with SW1) turns the lamp back on.

When the power switch (SW1) is first turned on, the thermistor R5 is a large resistance because the entire lamp is cold. So the input of U1C (4011) is low level. So the output of U1C is high level, and the output of U1D (4011) is low level. When the temperature rises to the operating point, the resistance value of the thermistor R5 becomes smaller, and the input of U1C becomes high enough to flip. So the output of U1C becomes low level, and the output of U1D becomes high level. Such a high output level of U1D is sent to the input terminal of U1C through diode D3 (1N4004), so that U1C continues to be low output level. At the same time, the high output level of U1D is transmitted to the input terminal of U1A through diode D2 (1N4004), so that the electronic switch is turned off. Therefore, even if the temperature of the lamp becomes lower again, since the input terminal of U1C is now controlled by the high-level output of U1D instead of R5, the lamp is kept in a power-off state unless the user turns off the power switch SW1. Then turn on the power switch SW1, and start a new cycle. This new "Lockout" feature completely secures the light. Of course, if the diode D3 is canceled, the temperature control part can act like the prior art, that is, the lamp will be powered off when the temperature reaches the operating point, and the lamp will be powered on when the temperature cools to the reset point. This "lock" function is not equipped with the light control part, because there is no safety problem in this part.

The resistance values of R3, R6, R7 and R9 in Fig. 2 are all 10K. Both D4 and D5 are 1N4007. Q1 is MPSA42 and Q2 is MPSA92.

Fig. 3 is a schematic diagram of the appearance of the present invention, wherein KN is a dimmer control knob with an on/off switch, that is, SW1 and R8 in Fig. 2 are combined together.

Fig. 4 is a partial cross-sectional schematic diagram of the light detection system of the present invention, wherein PH is a plastic bracket, GL is glass, and ST is a hollow light pole.

Fig. 5 is a partial cross-sectional schematic diagram of the temperature detection system of the present invention, wherein SH is a lampshade. Fig. 6 is the front view of the control panel of the present invention, wherein the English word AUTO represents automatic, MANUAL represents manual, OFF represents disconnection, and MAX represents maximum.

Fig. 7 is a circuit diagram of another embodiment of the present invention. The circuit in the figure can also be divided into two parts, the traditional dimmer circuit and the electronic circuit of the invention, like the previous embodiment, and the latter also includes a DC power supply part, an electronic switch part, a light control part and a temperature control part.

The switch SW1 in Figure 2 is combined with the potentiometer R8. SW1 controls the on-off of the power supply, and R8 adjusts the brightness of the lamp. SW2 is a dial-type two-position switch for selecting automatic mode or manual mode. In Figure 7, a double-pole three-position power switch (SW1A, SW1B) is used to select three modes: manual (M, MANUAL), disconnection (O, OFF) and automatic (A, AUTO). One position is to turn on the power, one position is to cut off the power, and the switch is separated from the dimming potentiometer.

The DC power supply part in Figure 7 is exactly the same as that in Figure 2, and it is also composed of rectifier diode D1 (IN4004), resistor R1 (15K/2 watts), capacitor C1 (220 microfarads/16 volts) and Zener diode Z1 ( 6.8 volts, 1/2 watts).

The light-emitting diode LED in Figure 2 is divided into two light-emitting diodes LED1 and LED2 in Figure 7, which respectively display the working conditions of the light control part and the temperature control part, and a transistor for amplifying current is added in the branch of each light-emitting diode Q2' (CS9014C) and Q3 (CS9014C).

The electronic switch part in Fig. 7 is the same as that in Fig. 2, mainly including an integrated circuit IC (U1B) and two transistors Q5 (MPSA42) and Q6 (MPSA92).

The light control part in Fig. 7 is similar to that in Fig. 2, mainly including a photosensitive resistor CdS, an integrated circuit IC (U1A) and a potentiometer R2' (100K).

The temperature control part in Figure 7 mainly includes two transistors Q1' (CS9015C) and Q4 (CS9014C), a potentiometer R4 (10K), a diode D2' (1N4148) and two integrated circuits IC (U1C/U1D). Among them, Q1' is connected as a diode to replace the thermistor R5 in Figure 2, Q4 is added to amplify the signal, and the diode D2' is the same as the diode D3 in Figure 2 to play a "locking" role.

Comparing the circuit in Fig. 7 with the circuit in Fig. 2, except that the thermistor R5 is replaced by the crystal Q1' and the light-emitting diode LED is replaced by the light-emitting diodes LED1 and LED2, another difference is that in Fig. D2 between the temperature control part (between the output terminal of U1D and the input terminal of U1A) has been canceled in Figure 7, so the output signal of the temperature control part U1D does not need to pass through U1A of the light control part and then be sent to the electronic switch Part of the input terminal of U1B is directly amplified by the transistor Q4 and then input to U1B. The working principles of the rest of the circuit in Figure 7 are similar to those in Figure 2, so they will not be repeated here.

The type of integrated circuit U1A, U1B, U1C and U1D in Fig. 7 is 4011, the resistance value of R3, R6, R7, R9, R11 and R14 is 10K, the resistance value of R5', R8', R10 and R12 is 100K, and the resistance value of R13 is 250K, the inductance of L1 is 0.8 millihenry, C2' and C3 are both 0.1 microfarads/250 volts, L is a bulb of 300 watts/120 volts, DB3 is a trigger diode, and 4010 is a triac element.

Although the present invention has been described in conjunction with the above specific embodiments, it will be obvious to those skilled in the art that various improvements and changes can be made, and these improvements and changes all fall within the limits of the appended claims. within the spirit and scope of the present invention.

Claims (15)

1. electronic light/the temperature control equipment of a floor halogen lamp comprises the electronic circuit of a traditional electronic light modulator circuit and an additional invention it is characterized in that the electronic circuit of this invention comprises:

(1) DC power supply part, it comprises:

Rectifier diode (D1) is used for the alternating current halfwave rectifier,

Resistor (R1) is used for voltage is reduced,

Filtering capacitor (C1) is used for the current filtering after the rectification,

Zener diode (Z1), 6 volts of direct voltages that are used to provide stable are to the electronic circuit of whole invention;

(2) electronic switch part comprises:

Integrated circuit (IC) (U1B), as the inverter of two transistors (Q1/Q2),

Two transistors (Q1/Q2) are used to control the on/off of TRIAC 4010;

(3) photocontrol part comprises:

Photo resistance (CdS) is used to detect selected ambient brightness,

Integrated circuit (IC) (U1A) is used for the luminance output signal voltage by photo resistance (CdS) detection,

Potentiometer (R2) is used for regulating/reset photocontrol operating point partly by the user;

(4) temperature control part branch comprises:

Thermistor (R5) is used to detect the temperature rising of lamp,

Two integrated circuit (IC) (U1C/U1D) are used for the signal level upset from temperature-sensitive resistance (R5), and control the integrated circuit (IC) (U1A) of light-operated part,

Potentiometer (R4) is used for the user and regulates/reset the operating point that temperature control part divides.

2. device according to claim 1 is characterized in that, wherein temperature control part divides and also comprises an additional diode (D3), and it is sent to relevant integrated circuit (IC) (U1C) with control signal, so that lamp " locking " is disconnected situation.

3. device according to claim 2 is characterized in that, temperature control part can be cancelled additional diode (D3) in dividing, to obtain continuous on/off circulation as prior art.

4. device according to claim 1, it is characterized in that, it also comprises LED, be connected in series in the output of the integrated circuit (IC) (U1B) of electronic switch part, in order to show actuating signal, so that the user of lamp manually controls from the detection of photocontrol part or temperature control part branch.

5. device according to claim 1 is characterized in that, wherein photo resistance is such placement, usually towards object of reference.

6. device according to claim 1 is characterized in that, wherein photo resistance is such placement, usually towards the object that is illuminated by object of reference.

7. according to claim 5 or 6 described devices, it is characterized in that wherein this object of reference is another lamp.

8. according to claim 5 or 6 described devices, it is characterized in that wherein this object of reference is a sky.

9. according to the described device of arbitrary claim in the claim 1 to 6, it is characterized in that wherein this object of reference is any object by another lamp or sky glow.

10. electronic light/the temperature control equipment of a floor halogen lamp comprises the electronic circuit of a traditional electronic light modulator circuit and an additional invention it is characterized in that the electronic circuit of this invention comprises:

(1) DC power supply part, it comprises:

Rectifier diode (D1) is used for the alternating current halfwave rectifier,

Resistor (R1) is used for voltage is reduced,

Filtering capacitor (C1) is used for the current filtering after the rectification,

Zener diode (Z1), 6 volts of direct voltages that are used to provide stable are to the electronic circuit of whole invention;

(2) electronic switch part comprises:

Integrated circuit (IC) (U1B), as the inverter of two transistors (Q5/Q6),

Two transistors (Q5/Q6) are used to control the on/off of TRIAC 4010;

(3) photocontrol part comprises:

Photo resistance (CdS) is used to detect selected ambient brightness,

Integrated circuit (IC) (U1A) is used for the luminance output signal voltage by photo resistance (CdS) detection,

Potentiometer (R2) is used for regulating/reset photocontrol operating point partly by the user,

Light-emitting diode (LED1) is used for transfiniting of display light control section;

(4) temperature control part branch comprises:

Transistor (Q1 ') is used to detect the temperature rising of lamp,

Two integrated circuit (IC) (U1C/U1D) are used for the signal level upset from transistor (Q1 '), and the integrated circuit (IC) (U1B) of control electronic switch part,

Potentiometer (R4) is used for the user and regulates/reset the operating point that temperature control part divides,

Light-emitting diode (LED2) is used for transfiniting of displays temperature control section.

11. device according to claim 10 is characterized in that, wherein photo resistance is such placement, usually towards object of reference.

12. device according to claim 10 is characterized in that, wherein photo resistance is such placement, usually towards the object that is illuminated by object of reference.

13., it is characterized in that wherein this object of reference is another lamp according to claim 11 or 12 described devices.

14., it is characterized in that wherein this object of reference is a sky according to claim 11 or 12 described devices.

15., it is characterized in that wherein this object of reference is any object by another lamp or sky glow according to the described device of arbitrary claim in the claim 10 to 14.

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