Control device of alternating-current emergency fan lamp

Abstract

The utility model discloses a control device of an alternating current emergency fan lamp and a lamp, the control device comprises a control circuit and an MCU, and the control circuit comprises a detection and charge-discharge circuit, an energy storage element and a direct release switch. The lamp has an alternating current mode and an emergency mode, in the alternating current mode, the function and operation of the lamp are kept consistent with those of an existing fan lamp, meanwhile, the lithium battery can be charged, and in the emergency mode, it is ensured that the lamp can provide the lighting function and the fan function in the power failure state.

Description

Technical Field

[0001] The utility model relates to a control device for LED emergency lighting, specifically, to a control device for an LED AC emergency fan lamp, and an AC emergency fan lamp including the control device. Background Art

[0002] As a new generation of lighting source, LEDs have been widely used. In recent years, a special type of LED lamp that combines a fan and lighting has become popular in the market. This type of fan lamp is currently widely used at home and abroad, especially in tropical countries and regions.

[0003] Figure 1 The control system of the fan lamp with the largest production volume in the prior art is shown. In this fan lamp, a 9V or 12V DC brushless motor is used, and the cost is relatively low. As Figure 1 shown, when the switch 101 is closed, the control system is connected to the AC power grid; when the switch 101 is opened, the control system is disconnected from the AC power grid. The rectifier bridge 102 rectifies the alternating current into direct current.

[0004] The control core of this system is the single-chip microcomputer MCU 140. It outputs a dimming signal DIM to the main light source driving circuit 150 to achieve stepless adjustment of the brightness and color temperature of the light source 106; moreover, the MCU 140 also outputs a signal FAN, and through the NMOS transistor 105, it realizes speed regulation and timing control of the fan motor 130. The infrared remote control is a standard accessory of this lamp. The infrared receiver 160 receives the infrared signal from the remote control and generates an output signal IRIN to the MCU 140. After decoding the IRIN signal, the MCU 140 executes corresponding controls, such as turning on the light, turning off the light, stepless dimming, stepless color adjustment, turning on the fan, turning off the fan, etc.

[0005] The DC / DC constant voltage circuit 110 provides a stable 9V or 12V voltage for the fan motor 130 and supplies power to the MCU 140 through the 5V voltage stabilizing circuit 120. The resistors 103 and 104 cooperate with the rectifier bridge 102 to detect the state of the switch 101. When the switch 101 is closed, a periodic voltage signal of 50 / 60Hz will appear at the ACS node; when the switch 101 is open, the voltage at the ACS node is zero. Based on the information of the voltage at the ACS node, the MCU 140 can determine the operation of the switch 101 and then execute the corresponding program. For example, the program can be executed as follows: when the switch 101 is initially closed, the MCU 140 turns on the main light source 106 and turns off the fan motor 130; when the switch 101 is open and then closed within 5 seconds, the MCU 140 turns off the main light source 106 and starts the fan motor 130; when the switch 101 is open again and then closed within 5 seconds, the MCU 140 turns on the main light source 106 and starts the fan motor 130 at the same time; when the switch 101 is open and then closed within 5 seconds, it loops from the beginning. This fan lamp can be finely controlled through an infrared remote control, such as stepless dimming / color mixing, motor speed regulation, timing, etc.; it can also achieve the most basic operations, such as turning on or off the main light source 106 and starting or stopping the fan motor 130, by closing and opening the switch 101.

[0006] However, the above-mentioned fan lamp as Figure 1 shown cannot be used in the power outage state. The reality is that currently there is no lamp in the market that can simultaneously meet the lighting and fan requirements during the power grid outage period. Summary of the Invention

[0007] The purpose of the present invention is to invent a control device for an AC emergency fan lamp to meet the lighting and fan requirements both during the normal power supply period of the power grid and during the power outage period, aiming at the above-mentioned defects of the fan lamp in the prior art.

[0008] According to the first aspect of the present invention, there is provided a control device for an AC emergency fan lamp, the lamp having an LED main light source, a fan motor, and an LED emergency light source. The control device includes a control circuit and an MCU. The control circuit includes a detection and charge-discharge circuit, an energy storage element, and a direct switch. Among them, the detection and charge-discharge circuit is connected to the AC power grid through a control switch, and generates an emergency mode start signal when it detects a power outage of the power grid and the control switch is closed and the energy storage element has sufficient power; the direct switch is connected between the output node (CV) of the DC voltage source and the energy storage element, and is closed under the control of the emergency mode start signal, so that the energy storage element discharges to the LED emergency light source and the fan motor through the output node (CV) of the DC voltage source; the MCU generates a dimming signal for the LED emergency light source and a speed regulation signal for the fan motor based on the emergency mode start signal.

[0009] According to a second aspect, a control device for an AC emergency fan lamp is provided. The lamp has an LED main light source, a fan motor, and an LED emergency light source. The control device includes a control circuit and an MCU. The control circuit includes a detection and charge-discharge integrated circuit, an energy storage element, and a charge-discharge switch. Among them, the detection and charge-discharge integrated circuit is connected to the AC power grid through a control switch. When it detects a power outage in the power grid and the control switch is closed, and at the same time the energy storage element has sufficient power, it generates an emergency mode start signal. The charge-discharge switch is connected between the output node (CV) of the DC voltage source and the energy storage element, and closes under the control of the emergency mode start signal, so that the energy storage element discharges to the LED emergency light source and the fan motor through the output node (CV) of the DC voltage source. The MCU generates a dimming signal for the LED emergency light source and a speed regulation signal for the fan motor based on the emergency mode start signal.

[0010] According to a third aspect, an AC emergency fan lamp is provided, which is characterized by including the control device described in the first or second aspect above, an LED main light source, a fan motor, and an LED emergency light source. The control device has an AC mode and an emergency mode.

[0011] According to the present invention, the AC emergency fan lamp has two modes: an AC mode and an emergency mode. In the AC mode, its functions and operations are the same as those of the Figure 1 shown fan lamp, and at the same time, the lithium battery can be charged. In the emergency mode, the lamp ensures that basic lighting and fan functions can be provided even in a power outage state. The present invention can effectively improve the working and living conditions of the people and has practical value in reality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To better understand the present invention, the present invention will be further described below with reference to embodiments and the accompanying drawings. In the drawings:

[0013] Figure 1 shows the control system of the fan lamp with the largest production proportion in the prior art;

[0014] Figure 2 is the circuit structure diagram of the AC emergency fan lamp according to an embodiment of the present invention:

[0015] Figure 3 is Figure 2 an example of the control circuit 210 in

[0016] Figure 4 is Figure 3 an example of the detection and charge-discharge circuit 220 in

[0017] Figure 5 isFigure 4 An example of the charging equalization and undervoltage protection circuit;

[0018] Figure 6 For Figure 2 Another example of the control circuit 210 in

[0019] Figure 7 For Figure 6 An example of the detection and charge / discharge integrated circuit 310 in

[0020] Figure 8 For Figure 2 Another example of the control circuit 210 in Detailed implementation manner

[0021] The inventor considered that the AC emergency fan lamp of the present utility model preferably adopts two working modes, namely, the AC mode and the emergency mode. In the two working modes, the operation methods and effects of the lamp remote control and the switch need to be the same, which requires the hardware and software of the remote control and the MCU to be kept as unchanged as possible. In addition, the lamp can be provided with an emergency light source; however, the space is limited and only one fan motor can be installed.

[0022] In the emergency mode, taking a 9V motor as an example, how to provide a DC voltage close to 9V for the 9V motor is a difficult problem. Here, the inventor faces two choices. One choice is to use a single series of 4.2V lithium batteries, and in the emergency mode, boost the voltage to 9V through a high-efficiency boost circuit. The other choice is to use two 4.2V lithium batteries in series, and the fully charged voltage is 8.4V (very close to 9V), and there is no need for a boost circuit and it can directly supply power to the 9V motor. The first choice has two difficulties. One is that it is difficult to charge in the AC mode. Since the voltage of the 4.2V battery is far from the working voltage of the motor, which is 9V, a high-efficiency buck circuit is required to step down the voltage to about 5V to charge the battery. The other is that it is very difficult to boost the 4.2V voltage to 9V with high efficiency, and the efficiency is difficult to exceed 80%. In this way, a high-efficiency buck circuit is required for charging, and a boost circuit is required for discharging, and it is also difficult to achieve high boost efficiency. Therefore, the first choice is obviously not the preferred one. Considering the second choice again, no buck circuit is required for charging and it can be directly charged; no boost circuit is required for discharging and it can be directly discharged, and both the charging and discharging efficiencies are very high, which is a good choice. The difficulty of the second choice is that two lithium batteries in series need a balancing circuit, but this is not a problem that is difficult to solve, and both the circuit complexity and the cost are acceptable.

[0023] Considering that only one motor can be used, the present utility model adopts a "direct charging and direct discharging" circuit architecture. Referring to Figure 2 , Figure 2 is the circuit structure diagram of the AC emergency fan lamp according to an embodiment of the present utility model. As Figure 2As shown, the emergency fan light fixture has an LED main light source 106, a fan motor 130, and an LED emergency light source 201. Here, the fan motor 130 takes a 9V motor as an example; because of the application of two lithium batteries in series, multiple 6V LED lamp beads can be correspondingly selected in parallel for the emergency light source 201, and a current-limiting resistor 202 is used to adjust the working current of the emergency light source 201.

[0024] It can be seen that Figure 1 each circuit module of the fan light fixture is basically completely retained in Figure 2 . Compared with Figure 1 , in addition to adding the above-mentioned LED emergency light source 201, Figure 2 a control circuit 210 and peripheral components are also added. Figure 2 In, the control circuit 210 and the MCU 240 constitute the control device of the emergency fan light fixture, and this control device has an AC mode and an emergency mode. The output signal EMON of the control circuit 210 is sent to the MCU 240. If the output signal EMON is at a high level, and this signal is an emergency mode start signal, it indicates that the control device is in the emergency discharge mode.

[0025] For different states of the AC power grid and the control switch 101, the control device makes the following judgments. 1) If the control switch 101 is in the off state, the output signal EMON of the control circuit 210 is at a low level, and the light fixture is in the off state: 2) If the control switch 101 is in the on state and the AC power grid is supplying power normally, the output signal EMON of the control circuit 21O is at a low level, and this signal is an emergency mode off signal. At this time, the control device is in the AC mode, and the DC voltage source output node CV provides a charging current for the energy storage element inside the control circuit 210: 3) If the control switch 101 is in the on state and the AC power grid is powered off at the same time, the output signal EMON of the control circuit 210 is at a high level, and at this time the control device is in the emergency discharge mode.

[0026] In addition, as Figure 2 shown, when the signal EMON is at a low level, the NMOS transistor 204 is in the off state. At this time, regardless of the state of the dimming signal DIM output by the MCU 240, the emergency light source 201 will not turn on. Only when both the signal EMON and the dimming signal DIM are at a high level, both the NMOS transistor 204 and the NMOS transistor 203 are closed, and the emergency light source 201 will turn on. This means that the emergency light source 201 is turned on under the logical AND control of the emergency mode start signal and the dimming signal DIM.

[0027] Figure 3 For Figure 2 is an example of the control circuit 210 in. As Figure 3As shown, the control circuit 210 includes a detection and charge / discharge circuit 220, energy storage elements, and a direct amplification switch. The energy storage elements are two lithium batteries 221 and 222 connected in series. The direct amplification switch is connected between the output node CV of the DC voltage source and the lithium battery 221, and includes a PMOS transistor 225 and a PMOS transistor 223 with their sources connected, a pull-up resistor 224, and a discharge NMOS transistor 226. Among them, the drain of the PMOS transistor 225 is connected to the node CV; the drain of the PMOS transistor 223 is connected to the positive electrode of the lithium battery 221; one end of the pull-up resistor 224 is connected to the sources of the PMOS transistors 225 and 223, and the other end is commonly connected to the drain of the discharge NMOS transistor 226 with the gates of the PMOS transistors 225 and 223; the source of the discharge NMOS transistor 226 and the negative electrode of the lithium battery 222 are commonly connected to the reference ground GND, and the gate is connected to the emergency mode on / off signal EMON.

[0028] Referring to Figure 2 and Figure 3 , the detection and charge / discharge circuit 220 is connected to the AC power grid through the control switch 101. When it is detected that the power grid is in a power outage state, the control switch 101 is closed, and at the same time the lithium batteries 221 and 222 are fully charged, a high-level EMON signal is generated. Under other conditions, the EMON signal is at a low level.

[0029] When the EMON signal is at a high level, it means that the control device is in the emergency discharge state. At this time, the discharge NMOS transistor 226 will turn on to pull down the gates of the two PMOS transistors 223 and 225, that is, close the discharge direct amplification switch, and directly output the sum of the voltages of the two lithium batteries 221 and 222 to the CV (for example, 9V) node with a low impedance to discharge the emergency light source 201 and the fan motor 130.

[0030] At the same time, the high-level EMON signal is sent to an I0 pin of the MCU 240, and the MCU 240 considers that the control device is in the emergency mode. In this mode, the MCU 240 receives the control of the remote control and the control switch 101, and performs direct control of the emergency light source 201 and the fan motor 130, and the control method is the same as in the AC mode. Here, the only difference between the MCU 240 and Figure 1 the MCU 140 in Figure 2 is that the MCU 240 can recognize the emergency mode on signal and perform corresponding control. It should be noted that

[0031] When the normal power supply of the power grid is detected and the control switch 101 is closed, the detection and charge / discharge circuit 220 generates a low-level EMON signal, that is, an emergency mode off signal. At this time, the discharge NMOS transistor 226 is turned off, and the pull-up resistor 224 will pull up the gate voltages of the PMOS transistors 223 and 225, so that the direct amplification switch is in the off state. Regardless of whether the CV node voltage is 9V or 0V, it is ensured that no leakage current leaks from the two lithium batteries to the CV node. At the same time, the DC / DC constant voltage circuit 110 provides a charging current for the lithium batteries 221 and 222 through the node CV. The MCU 240 then enters the AC mode, generates a dimming signal DIM for the drive circuit 150 of the main light source 106, and generates a speed control signal FAN for the fan motor 130.

[0032] Refer to Figure 4 , Figure 4 For Figure 3 An example of the detection and charge / discharge circuit 220 in

[0033] As Figure 4 shown, the detection and charge / discharge circuit 220 also has a detection circuit 211, charge balancing and undervoltage protection circuits 216 and 215, and an AND gate 214. Among them, the detection circuit 211 is responsible for detecting the power supply and power outage conditions of the AC power grid and the closing and opening conditions of the control switch 101, and outputs a signal EM connected to the first input terminal of the AND gate 214; the charge balancing and undervoltage protection circuit 216 is connected between the positive and negative electrodes of the lithium battery 221 to provide passive charge balancing and undervoltage protection for the lithium battery 221, and outputs a signal UVP2 connected to the second input terminal of the AND gate 214; the charge balancing and undervoltage protection circuit 215 is connected between the positive and negative electrodes of the lithium battery 222 to provide passive charge balancing and undervoltage protection for the lithium battery 222, and outputs a signal UVP1 connected to the third input terminal of the AND gate 214; the output terminal of the AND gate 214 generates the above-mentioned EMON signal.

[0034] Only when the power grid is powered off and the control switch 101 is in the closed state, can the detection circuit 211 output an EM high-level signal; under other conditions, the EM signal is low level. Under normal circumstances, the output signals UVP1 and UVP2 of the charge equalization and undervoltage protection circuits 215 and 216 are both high level; as long as any lithium battery shows undervoltage, the corresponding output signal will change from high level to low level. The signals EM, UVP1, and UVP2 are jointly sent to the AND gate 214 for logical AND operation to output the EMON signal. That is to say, only when the above three signals are all high, can the EMON signal be high level. As mentioned above, the EMON high level means that the control device enters the emergency discharge mode, and the EMON low level means that the control device does not allow the lithium battery to discharge.

[0035] Generally speaking, charge equalization is divided into passive charge equalization (or called passive charge equalization) and active charge equalization (or called active charge equalization). The former has a simple circuit structure, low cost, and good reliability, but lower efficiency and a relatively small equalization current; the latter has a complex structure, high cost, and lower reliability than the former, but higher efficiency and a relatively large equalization current. This utility model is for ordinary consumer scenarios and is sensitive to cost, so a low-cost and high-reliability passive charge equalization circuit is adopted. Refer to Figure 5 , Figure 5 For Figure 4 an example of the charge equalization and undervoltage protection circuit in Figure 4 . In the AC mode, the CV constant voltage power supply charges the lithium battery. When the voltage of any lithium battery reaches 4.2V for example, the error amplifier 218 inside the circuit will turn on the PMOS transistor 219 to bypass the charging current to the battery negative electrode to avoid overcharging of the lithium battery. This bypass of the charging current is called passive charge equalization, that is, after any battery is fully charged, it does not affect the continued charging of other uncharged lithium batteries. The PMOS transistor 219 bears all the passive equalization power consumption. The above equalization circuit has two functions, one is the charge equalization function, and the other is to avoid overcharging of the lithium battery. If the voltage of the lithium battery is lower than 2.8V for example, the comparator 217 will output a low-level UVP signal, and then after Figure 4 the AND gate 214 in Figure 3 outputs the EMON signal as low, disconnect Figure 3 the discharge NMOS transistor 226 and the PMOS transistors 223 and 225 in

[0036] Figure 6 For Figure 2 another example of the control circuit 210 in Figure 7 . In this example, the detection and charge-discharge circuit 31O uses an integrated circuit, and the internal circuit structure of the detection and charge-discharge integrated circuit 310 is as shown in Figure 7 . Compared with Figure 4 ,Figure 7 An additional charge and discharge management circuit 312 is added to implement functions such as low-voltage small-current charging of the battery, constant-current charging, and over-current protection during discharge. The specific implementation circuits of these functions are relatively mature and common in the industry. Figure 6 In the example, PMOS transistors 223 and 225 and resistor 224 form a charge and discharge dual-purpose switch. This charge and discharge dual-purpose switch is not only a direct-through switch but also a direct-charging switch; that is, charging passes through here and discharge also passes through here. During emergency discharge, this charge and discharge dual-purpose switch closes under the control of a high-level EMON signal, enabling lithium batteries 221 and 222 to discharge to the emergency light source and the fan motor through the DC voltage source output node CV. During AC charging, node CV provides a charging current for lithium batteries 221 and 222 through this charge and discharge dual-purpose switch.

[0037] Figure 8 For Figure 2 Another example of the control circuit 21O. In this example, the charge and discharge dual-purpose switch adopts another connection method. The drains of two PMOS transistors 223 and 225 are connected together, and their sources are respectively connected to the positive electrode of lithium battery 221 and node CV. The working principle of this example is basically the same as that of Figure 6 the example. Figure 8 In it, the gates of the two PMOS transistors are separately connected and have independent drive circuits, and the circuit complexity is slightly higher: but it lacks Figure 6 resistor 224 in

[0038] In the examples described above, the energy storage battery is two lithium batteries connected in series, and the fan motor is a 9V motor. However, according to the principle and control method of the present utility model, the energy storage element can also adopt three lithium batteries connected in series (corresponding to setting three charging equalization circuits), and the fan motor is a 12V motor: or, the energy storage element adopts six lithium batteries connected in series (corresponding to setting six charging equalization circuits), and the fan motor is a 24V motor; or, the energy storage element adopts twelve lithium batteries connected in series (corresponding to setting twelve charging equalization circuits), and the fan motor is a 48V motor.

[0039] In order to improve the conversion efficiency of the emergency light source as much as possible, the LED emergency light source is composed of multiple 3V LED lamp beads connected in series, and the number of series connections corresponds to the working voltage of the fan motor: the number of series-connected LEDs of the emergency light source corresponding to the 12V fan motor application solution is 3, and the working voltage is about 9V; the number of series-connected LED lamp beads of the emergency light source corresponding to the 24V fan motor application solution is 6 to 7, and the working voltage is between 18V and 21V; the number of series-connected LED lamp beads of the emergency light source corresponding to the 48V fan motor application solution is 14 to 15, and the working voltage is between 42V and 45V.

[0040] Obviously, there can be many variations of the present utility model described herein, and such variations should not be considered as departing from the spirit and scope of the present utility model. Therefore, all changes that are obvious to those skilled in the art are included within the scope covered by the appended claims.

Claims

1. A control device for an AC emergency fan lamp, the lamp having an LED main light source, a fan motor and an LED emergency light source, the control device comprising a control circuit and an MCU, the control circuit comprising a detection and charging and discharging circuit, an energy storage element and a direct-release switch, wherein: The detection and charging and discharging circuit is connected to the AC power grid via a control switch, and generates an emergency mode start signal when the power grid is detected to be out of power and the control switch is closed and the energy storage element is fully charged; The direct-release switch is connected between the DC voltage source output node (CV) and the energy storage element, and is closed under the control of the emergency mode start signal, so that the energy storage element discharges to the LED emergency light source and the fan motor through the DC voltage source output node (CV): The MCU generates a dimming signal to the LED emergency light source and a speed regulation signal to the fan motor based on the emergency mode start signal.

2. The control device according to claim 1, characterized in that The detection and charge-discharge circuit generates an emergency mode shutdown signal when it detects that the power grid is supplying power normally and the control switch is closed: The direct-acting switch is disconnected under the control of the emergency mode shutdown signal, and the DC voltage source output node (CV) provides charging current for the energy storage element; The MCU enters the AC mode, generates a dimming signal to the driving circuit of the LED main light source, and generates a speed regulation signal to the fan motor.

3. The control device according to claim 2, characterized in that The energy storage element adopts a first lithium battery and a second lithium battery connected in series, and the fan motor is a 9V motor.

4. The control device according to claim 3, characterized in that: The detection and charge-discharge circuit has a direct-current charging circuit composed of a diode and a current-limiting resistor, and the direct-current charging circuit is connected between an output node (CV) of a direct-current voltage source and a positive electrode of a first lithium battery.

5. The control device according to claim 4, characterized in that The detection and charge-discharge circuit also has a detection circuit, a first and a second charge equalization and undervoltage protection circuit and an AND gate, wherein: A detection circuit detects the power supply and power failure status of the power grid and the closing and opening status of the control switch, and the output end is connected to the first input end of the AND gate: The first charge equalization and undervoltage protection circuit is connected between the positive and negative electrodes of the first lithium battery to provide passive charge equalization and undervoltage protection for the first lithium battery, and the output end is connected to the second input end of the AND gate: The second charge equalization and undervoltage protection circuit is connected between the positive and negative electrodes of the second lithium battery to provide passive charge equalization and undervoltage protection for the second lithium battery, and the output end is connected to the third input end of the AND gate: The AND gate generates the emergency mode on / off signal at the output end.

6. The control device according to claim 3, characterized in that: The direct-release switch includes a first PMOS tube and a second PMOS tube connected to the source, a pull-up resistor and a discharge NMOS tube, wherein: The first PMOS tube, the drain is connected to the DC voltage source output node (CV): A second PMOS tube, the drain of which is connected to the positive electrode of the first lithium battery; The pull-up resistor has one end connected to the source of the first and second PMOS tubes, and the other end and the gate of the first and second PMOS tubes are connected to the drain of the discharge NMOS tube: The discharge NMOS tube has a source electrode and a negative electrode of the second lithium battery connected to a reference ground, and a gate electrode connected to the emergency mode on / off signal.

7. The control device according to claim 2, characterized in that: The LED emergency light source is turned on under the logic AND control of the emergency mode start signal and the dimming signal.

8. The control device according to claim 2, characterized in that: The energy storage element uses three lithium batteries connected in series, and the fan motor is a 12V motor; or the energy storage element uses six lithium batteries connected in series, and the fan motor is a 24V motor.

9. A control device for an AC emergency fan lamp, the lamp having an LED main light source, a fan motor and an LED emergency light source, the control device comprising a control circuit and an MCU, the control circuit comprising a detection and charging and discharging integrated circuit, an energy storage element and a charging and discharging dual-purpose switch, wherein: The detection and charging and discharging integrated circuit is connected to the AC power grid via a control switch. When the power grid is detected to be out of power and the control switch is closed, and the energy storage element is fully charged, an emergency mode start signal is generated: A charge-discharge dual-purpose switch is connected between the DC voltage source output node (CV) and the energy storage element, and is closed under the control of the emergency mode start signal, so that the energy storage element discharges to the LED emergency light source and the fan motor through the DC voltage source output node (CV); The MCU generates a dimming signal to the LED emergency light source and a speed regulation signal to the fan motor based on the emergency mode start signal.

10. The control device according to claim 9, characterized in that The detection and charge-discharge integrated circuit generates an emergency mode closing signal when detecting that the power grid is supplying power normally and the control switch is closed; The DC voltage source output node (CV) provides a charging current to the energy storage element through the charging and discharging dual-purpose switch: The MCU enters the AC mode, generates a dimming signal to the driving circuit of the LED main light source, and generates a speed regulation signal to the fan motor.

11. An AC emergency fan lamp, characterized in that: The invention comprises a control device as claimed in any one of claims 1 to 10, an LED main light source, a fan motor and an LED emergency light source, wherein the control device has an AC mode and an emergency mode.

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