Emergency lighting fixture with alarm function

Abstract

The present invention provides an emergency lighting fixture with an alarm function, belonging to the technical field of emergency lighting. The emergency lighting fixture with an alarm function includes a mounting frame, a lighting lamp, and an alarm mechanism. The lighting lamp is installed in the inner cavity of the mounting frame. The lighting lamp is divided into a front shell and a rear shell. The alarm mechanism is installed on the surface of the rear shell. The alarm mechanism includes an action box, a bimetallic strip, and a guide rod. The action box is fixedly installed on the surface of the rear shell, and a buzzer is installed on the side wall of the action box. The present invention sets an alarm mechanism. When the surface temperature of the lighting lamp is higher than 80 degrees Celsius, the bimetallic strip bends, and the copper alloy bends toward the left, causing the bimetallic strip to bend toward the copper alloy side, pushing the push plate to drive the first contact to move synchronously to the left, and the first spring is compressed. Until the first contact and the second contact are closed, the buzzer and the power supply form a complete circuit, emitting an audible alarm, realizing a fire alarm, and ensuring the normal use of the lighting lamp in an emergency situation.

Description

Technical Field

[0001] The present invention relates to the technical field of emergency lighting, and in particular to an emergency lighting fixture with an alarm function. Background Art

[0002] Emergency lighting is a type of emergency lighting equipment used in special environments. It is specially designed to provide lighting while preventing the risk of explosion caused by electrical sparks or high temperatures caused by the lamps. Special materials are usually used to effectively prevent damage caused by electrical failures, sparks, heat sources, etc. caused by the lamps themselves or the external environment. Emergency lighting can ensure that necessary lighting is provided during power outages to avoid accidents due to insufficient lighting. In addition, in special environments such as tunnels, subways, and docks, lighting can ensure that even when the power system fails, it can still provide sufficient lighting to ensure the safety of personnel.

[0003] Existing emergency lighting generally uses external monitoring devices, such as smoke sensors, to control the operation of emergency lighting, but they themselves do not have an alarm function. Once the external monitoring device fails, it will cause the emergency lighting to malfunction, and the normal use of the lighting in an emergency situation cannot be guaranteed. Summary of the Invention

[0004] In order to remedy the above deficiencies, the present invention provides an emergency lighting fixture with an alarm function that overcomes the above technical problems or at least partially solves the above problems.

[0005] The present invention is achieved in that:

[0006] The present invention provides an emergency lighting fixture with an alarm function, comprising a mounting frame, a lighting lamp, and an alarm mechanism. The lighting lamp is mounted in the inner cavity of the mounting frame. The lighting lamp is divided into a front shell and a rear shell. The front shell and the rear shell are connected by screws. The alarm mechanism is mounted on the surface of the rear shell and is used to issue a fire alarm. The alarm mechanism includes:

[0007] An action box, the action box is fixedly mounted on the surface of the rear shell, and a buzzer is installed on the side wall of the action box for sounding an alarm;

[0008] A bimetallic strip, the bimetallic strip being installed in the inner cavity of the action box, the left portion of the bimetallic strip being made of a copper alloy material, and the bimetallic strip being made of a nickel-chromium alloy material;

[0009] The guide rods are symmetrically fixedly installed in the inner cavity of the action box, and a push plate is slidably installed between the two guide rods, and the push plate is tightly attached to the side wall of the copper alloy material end of the bimetallic sheet.

[0010] In a preferred embodiment, a lampshade is installed on the surface of the lighting lamp, a plurality of heat sinks are installed between the mounting frame and the front shell, a push rod is fixedly installed on the side wall of the push plate, a first substrate is fixedly installed on one end of the push rod, a first contact is installed on the side wall of the first substrate, and the first contact is electrically connected to the buzzer.

[0011] In a preferred embodiment, a second substrate is fixedly installed in the inner cavity of the action box, a second contact is installed on the side wall of the second substrate, the second contact is electrically connected to an external power supply, and a first spring is installed between the first substrate and the second substrate to drive the push plate to be tightly attached to the side wall of the bimetallic copper alloy material.

[0012] In a preferred embodiment, an emergency mechanism is installed on the surface of the lighting lamp for emergency heat dissipation of the lighting lamp. The emergency mechanism includes a pressure box and a nozzle. The pressure box is fixedly installed on the surface of the front shell and is filled with liquid nitrogen. A nozzle is installed on the surface of the front shell. A pipe is connected between the nozzle and the pressure box. A number of spray holes are opened on the side wall of the nozzle for spraying liquid nitrogen onto the surface of the lighting lamp for emergency heat dissipation.

[0013] In a preferred solution, a push block is slidably installed in the inner cavity of the pressure box, and a sealing plate is fixedly installed on the side wall of the push block to block the conduction between the pressure box and the nozzle. A through hole is opened on the surface of the sealing plate, and a tension spring is symmetrically installed in the inner cavity of the pressure box. One end of the tension spring is fixedly connected to the push block, and the other end of the tension spring is fixedly connected to the pressure box to drive the sealing plate to move.

[0014] In a preferred embodiment, a reaction box is fixedly mounted on the surface of the action box, sodium bicarbonate is stored in the reaction box, a solvent chamber is provided in the inner cavity of the action box, the solvent chamber is filled with acetic acid solution, a first piston is slidably mounted in the solvent chamber, a second spring is installed in the solvent chamber, one end of the second spring is fixedly connected to the action box, and the other end of the second spring is fixedly connected to the first piston, for driving the first piston to move downward.

[0015] In a preferred solution, a connecting rod is fixedly mounted on the bottom of the first piston, a wedge is fixedly mounted on the bottom of the connecting rod, a driving block is fixedly mounted on the surface of the push rod, and the driving block is wedge-shaped and is used to drive the driving block to move upward.

[0016] In a preferred embodiment, a one-way valve is installed on the surface of the solvent chamber, the other end of the one-way valve is connected to the reaction box, a filter plate is installed in the inner cavity of the reaction box, one end of the reaction box is connected to a first air pipe, the surface of the pressure box is connected to a second air pipe, and a joint is installed between the first air pipe and the second air pipe.

[0017] In a preferred embodiment, an isolation mechanism is installed between the front shell and the rear shell for isolating the lighting lamp from the outside world. The isolation mechanism includes a first sealing ring and a second sealing ring. The first sealing ring and the second sealing ring are fixedly installed on the side wall of the rear shell. The surface of the front shell is provided with a first sealing groove and a second sealing groove, which are used to accommodate the first sealing ring and the second sealing ring respectively.

[0018] In a preferred embodiment, a cavity is provided in the front shell, the cavity is filled with insulating liquid, a second piston is slidably installed in the cavity for squeezing the insulating liquid, a third spring is installed in the cavity, one end of the third spring is fixedly connected to the front shell, and the other end of the third spring is fixedly connected to the second piston for driving the second piston to move toward the rear shell, a channel is provided in the inner cavity of the front shell, one end of the channel is connected to the cavity for the passage of insulating liquid, a moving block is slidably installed in the inner cavity of the front shell for controlling the conduction of the channel, one end of the moving block is wedge-shaped, a fourth spring is fixedly installed on the side wall of the moving block for driving the moving block to move toward the first sealing groove, and a through groove is provided on the surface of the moving block for the passage of insulating liquid.

[0019] The present invention provides an emergency lighting fixture with an alarm function, which has the following beneficial effects:

[0020] 1. By setting up an alarm mechanism, when the surface temperature of the lighting lamp is higher than 80 degrees Celsius, it can be determined as a thermal abnormality, and there may be an accident such as fire. The bimetallic strip will bend, and the copper alloy will bend to the left, which will cause the bimetallic strip to bend toward the copper alloy side. The push plate will drive the first contact to move synchronously to the left, and the first spring will be compressed. Until the first contact and the second contact are closed, the buzzer and the power supply form a complete circuit, and an audible alarm will be issued to realize a fire alarm, thereby ensuring the normal use of the lighting lamp in an emergency.

[0021] 2. By setting up an emergency mechanism, when the bimetallic strip pushes the push plate to the left, the drive block can drive the wedge block to move the first piston upward, so that the one-way valve is opened, and the acetic acid solution in the solvent chamber is injected into the reaction box. The acetic acid solution reacts with sodium bicarbonate to produce a large amount of carbon dioxide gas, which is injected into the pressure box through the first air pipe and the second air pipe. The push block is pushed to the left, so that the through hole and the pipeline between the nozzle and the pressure box are connected, and liquid nitrogen can enter the nozzle and be sprayed from the nozzle to the surface of the lamp to perform emergency heat dissipation on the lamp, ensuring emergency use of the lamp under high temperature conditions.

[0022] 3. By setting up an isolation mechanism, the first sealing ring and the second sealing ring on the side wall of the rear shell are respectively aligned with the first sealing groove and the second sealing groove on the surface of the front shell and inserted. First, the moving block is squeezed to move the moving block toward the second sealing groove, so that the through groove and the channel are connected. As the first sealing ring continues to be inserted, the second piston will be squeezed downward, thereby injecting the insulating liquid in the cavity from the channel into the space between the first sealing ring and the second sealing ring, further sealing the front shell and the rear shell, preventing the arc generated inside the lamp from igniting the combustible gas in the external air, and ensuring the safe use of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0024] Figure 1 is a front perspective view provided by an embodiment of the present invention;

[0025] Figure 2 A rear perspective view of an embodiment of the present invention;

[0026] Figure 3 A side view of an embodiment of the present invention is provided;

[0027] Figure 4 A cross-sectional view of an action box provided in accordance with an embodiment of the present invention;

[0028] Figure 5 A side cross-sectional view of an embodiment of the present invention is provided;

[0029] Figure 6 Provided for the embodiments of the present invention Figure 5 Enlarged view of point A in the middle;

[0030] Figure 7 A cross-sectional view of a pressure box provided in accordance with an embodiment of the present invention;

[0031] Figure 8 Provided for the embodiments of the present invention Figure 7 Enlarged view of point B in the middle;

[0032] Figure 9 A top cross-sectional view of an embodiment of the present invention is provided;

[0033] Figure 10 Provided for the embodiments of the present invention Figure 9 Enlarged view of point C in the middle;

[0034] Figure 11An exploded view of an embodiment of the present invention;

[0035] Figure 12 Provided for the embodiments of the present invention Figure 11 Enlarged view of point D in the middle.

[0036] In the figure: 1. mounting frame; 2. lighting lamp; 21. front shell; 22. rear shell; 3. lampshade; 4. heat sink; 5. alarm mechanism; 501. action box; 502. buzzer; 503. bimetallic strip; 504. guide rod; 505. push plate; 506. push rod; 507. first substrate; 508. first contact; 509. second substrate; 510. second contact; 511. first spring; 6. emergency mechanism; 601. pressure box; 602. nozzle; 603. push block; 604. sealing plate; 605. through hole; 606. tension spring; 607. reaction box ;608, solvent chamber;609, first piston;610, second spring;611, connecting rod;612, wedge block;613, drive block;614, one-way valve;615, filter plate;616, first air pipe;617, second air pipe;618, joint;7, isolation mechanism;701, first sealing ring;702, second sealing ring;703, first sealing groove;704, second sealing groove;705, cavity;706, second piston;707, third spring;708, channel;709, moving block;710, fourth spring;711, through groove. DETAILED DESCRIPTION

[0037] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] Reference Figures 1-12 As shown, the present invention provides a technical solution: an emergency lighting fixture with an alarm function, comprising a mounting frame 1, a lighting lamp 2 and an alarm mechanism 5, the lighting lamp 2 being mounted in the inner cavity of the mounting frame 1, the lighting lamp 2 being divided into a front shell 21 and a rear shell 22, the front shell 21 and the rear shell 22 being connected by screws, a lampshade 3 being mounted on the surface of the lighting lamp 2, a plurality of heat sinks 4 being mounted between the mounting frame 1 and the front shell 21 for dissipating heat from the lighting lamp 2, an alarm mechanism 5 being mounted on the surface of the rear shell 22 for issuing a fire alarm, the alarm mechanism 5 comprising an action box 501, a bimetallic strip 503 and a guide rod 504, the action box 501 being fixedly mounted on the surface of the rear shell 22, a buzzer 502 being mounted on the side wall of the action box 501 for issuing an alarm.

[0039] Reference Figure 1-Figure 7 As shown, in a preferred embodiment, the bimetallic strip 503 is installed in the inner cavity of the action box 501, the left part of the bimetallic strip 503 is made of copper alloy material, and the bimetallic strip 503 is made of nickel-chromium alloy material. As the temperature rises, the copper alloy material with a larger expansion coefficient will expand more than the nickel-chromium alloy material with a smaller expansion coefficient, causing the bimetallic strip 503 to bend, and the copper alloy will bend to the left, causing the bimetallic strip 503 to bend toward the copper alloy side, and the guide rods 504 are symmetrically fixedly installed in the inner cavity of the action box 501, and a push plate 505 is slidably installed between the two guide rods 504, and the push plate 505 is tightly attached to the side wall of the copper alloy end of the bimetallic strip 503, and a push rod 506 is fixedly installed on the side wall of the push plate 505, and one end of the push rod 506 is fixedly installed with a first The substrate 507 has a first contact 508 mounted on its side wall. The first contact 508 is electrically connected to the buzzer 502. The lighting lamp 2 typically uses an LED as a light source, which has relatively low heat generation and emits less heat. During operation, the surface temperature is generally around 60 to 80 degrees Celsius. The nickel-chromium alloy / copper alloy bimetallic strip 503 is suitable for use in environments of 80 to 200 degrees Celsius. Therefore, when the surface temperature of the lighting lamp 2 is higher than 80 degrees Celsius, it can be determined as an abnormal heat condition, and there may be an accident such as a fire. The bimetallic strip 503 will bend, and the copper alloy will bend toward the left, causing the bimetallic strip 503 to bend toward the copper alloy side, pushing the push plate 505 to drive the first contact 508 to move synchronously to the left.

[0040] Reference Figure 1-Figure 7 As shown, in a preferred embodiment, a second substrate 509 is fixedly installed in the inner cavity of the action box 501, and a second contact 510 is installed on the side wall of the second substrate 509. The second contact 510 is electrically connected to the external power supply. A first spring 511 is installed between the first substrate 507 and the second substrate 509, which is used to drive the push plate 505 to be tightly attached to the side wall of the copper alloy material end of the bimetallic strip 503. As the push plate 505 drives the first contact 508 to continue to move to the left, the first spring 511 is compressed until the first contact 508 and the second contact 510 are closed. The buzzer 502 forms a complete circuit with the power supply, and a sound alarm is issued to realize a fire alarm, thereby ensuring the normal use of the lighting lamp 2 in an emergency situation.

[0041] In a preferred embodiment, the lighting lamp 2 usually uses LED as a light source, which has relatively low heat and emits less heat. The surface temperature during operation is generally around 60 degrees Celsius to 80 degrees Celsius, and the nickel-chromium alloy / copper alloy bimetallic strip 503 is suitable for use in an environment of 80 degrees Celsius to 200 degrees Celsius. Therefore, when the surface temperature of the lighting lamp 2 is higher than 80 degrees Celsius, it can be determined as a thermal abnormality, and there may be an accident such as a fire. The bimetallic strip 503 will bend, and the copper alloy will bend to the left, causing the bimetallic strip 503 to bend toward the copper alloy side, pushing the push plate 505 to drive the first contact 508 to move synchronously to the left, and the first spring 511 is compressed until the first contact 508 and the second contact 510 are closed. The buzzer 502 and the power supply form a complete circuit, issuing a sound alarm, realizing a fire alarm, and ensuring the normal use of the lighting lamp 2 in an emergency situation.

[0042] Reference Figures 1-8 As shown, in a preferred embodiment, an emergency mechanism 6 is installed on the surface of the lighting lamp 2 for emergency heat dissipation of the lighting lamp 2 to prevent the lighting lamp 2 from being unable to be used normally due to excessive temperature when a fire occurs. The emergency mechanism 6 includes a pressure box 601 and a nozzle 602. The pressure box 601 is fixedly installed on the surface of the front shell 21. The pressure box 601 is filled with liquid nitrogen for emergency cooling of the lighting lamp 2. A nozzle 602 is installed on the surface of the front shell 21. A pipe is connected between the nozzle 602 and the pressure box 601. A plurality of spray holes are opened on the side wall of the nozzle 602 for spraying liquid nitrogen onto the surface of the lighting lamp 2 for emergency heat dissipation.

[0043] Reference Figures 1-8 As shown, in a preferred embodiment, a push block 603 is slidably installed in the inner cavity of the pressure box 601, and a sealing plate 604 is fixedly installed on the side wall of the push block 603 for blocking the conduction between the pressure box 601 and the nozzle 602. A through hole 605 is provided on the surface of the sealing plate 604, and a tension spring 606 is symmetrically installed in the inner cavity of the pressure box 601. One end of the tension spring 606 is fixedly connected to the push block 603, and the other end of the tension spring 606 is fixedly connected to the pressure box 601, and is used to drive the sealing plate 604 to move. In normal working state, under the action of the tension spring 606, the push block 603 is driven to move to the right, so that the sealing plate 604 blocks the pipeline between the pressure box 601 and the nozzle 602, and liquid nitrogen cannot be sprayed out from the nozzle 602.

[0044] Reference Figures 1-8As shown, in a preferred embodiment, a reaction box 607 is fixedly installed on the surface of the action box 501, and sodium bicarbonate is stored in the reaction box 607. A solvent chamber 608 is opened in the inner cavity of the action box 501, and the solvent chamber 608 is filled with acetic acid solution. A first piston 609 is slidably installed in the solvent chamber 608, and a second spring 610 is installed in the solvent chamber 608. One end of the second spring 610 is fixedly connected to the action box 501, and the other end of the second spring 610 is fixedly connected to the first piston 609 for driving the first piston 609 to move downward. A connecting rod 611 is fixedly installed at the bottom of the first piston 609, and the bottom of the connecting rod 611 is fixed. A wedge block 612 is installed, and a driving block 613 is fixedly installed on the surface of the push rod 506. The driving block 613 is wedge-shaped and is used to drive the driving block 613 to move upward. When the surface temperature of the lighting lamp 2 is higher than 80 degrees Celsius, the bimetallic strip 503 pushes the push plate 505 to move to the left. The driving block 613 can drive the wedge block 612 to move the first piston 609 upward, so that the one-way valve 614 is conductive, and the acetic acid solution in the solvent chamber 608 is injected into the reaction box 607. The acetic acid solution reacts with sodium bicarbonate to produce a large amount of carbon dioxide gas. As the temperature rises, the reaction will be further accelerated, accelerating the production of carbon dioxide gas.

[0045] Reference Figures 1-8 As shown, in a preferred embodiment, a one-way valve 614 is installed on the surface of the solvent chamber 608, and the other end of the one-way valve 614 is connected to the reaction box 607 for injecting acetic acid solution into the sodium bicarbonate solution. A filter plate 615 is installed in the inner cavity of the reaction box 607, and one end of the reaction box 607 is connected to a first air pipe 616, and the surface of the pressure box 601 is connected to a second air pipe 617, and a joint 618 is installed between the first air pipe 616 and the second air pipe 617.

[0046] In a preferred embodiment, when the surface temperature of the lighting lamp 2 is higher than 80 degrees Celsius and is determined to be a thermal abnormality, which may lead to an accident such as a fire, the bimetallic strip 503 pushes the push plate 505 to move leftward, and the driving block 613 can drive the wedge block 612 to drive the first piston 609 to move upward, so that the one-way valve 614 is opened, and the acetic acid solution in the solvent chamber 608 is injected into the reaction box 607. The acetic acid solution reacts with sodium bicarbonate to produce a large amount of carbon dioxide gas, which is injected into the pressure box 601 through the first air pipe 616 and the second air pipe 617, pushing the push block 603 to move leftward, so that the through hole 605 and the pipeline between the nozzle 602 and the pressure box 601 are opened, and liquid nitrogen can enter the nozzle 602 and be sprayed from the nozzle to the surface of the lighting lamp 2 to perform emergency heat dissipation on the lighting lamp 2, ensuring the emergency use of the lighting lamp 2 under high temperature conditions.

[0047] Reference Figures 1-12As shown, in a preferred embodiment, an isolation mechanism 7 is installed between the front shell 21 and the rear shell 22, which is used to isolate the lighting lamp 2 from the outside world and prevent the arc generated inside the lighting lamp 2 from igniting combustible gases in the external air. For example, in places such as petrochemicals and coal mines, any electrical equipment that generates electric sparks or arcs may cause explosions or fires; the isolation mechanism 7 includes a first sealing ring 701 and a second sealing ring 702, and the first sealing ring 701 and the second sealing ring 702 are fixedly installed on the side wall of the rear shell 22. A first sealing groove 703 and a second sealing groove 704 are provided on the surface of the front shell 21, which are used to accommodate the first sealing ring 701 and the second sealing ring 702, respectively. During installation, the first sealing ring 701 and the second sealing ring 702 on the side wall of the rear shell 22 are respectively aligned with the first sealing groove 703 and the second sealing groove 704 on the surface of the front shell 21 and inserted, and then fastened with bolts.

[0048] Reference Figures 1-12 As shown, in a preferred embodiment, a cavity 705 is provided in the front shell 21, and the cavity 705 is filled with insulating liquid. A second piston 706 is slidably installed in the cavity 705 for squeezing the insulating liquid. A third spring 707 is installed in the cavity 705, and one end of the third spring 707 is fixedly connected to the front shell 21, and the other end of the third spring 707 is fixedly connected to the second piston 706 for driving the second piston 706 to move toward the rear shell 22. A channel 708 is provided in the inner cavity of the front shell 21, and one end of the channel 708 is connected to the cavity 705 for the passage of insulating liquid. A moving block 709 is slidably installed in the inner cavity of the front shell 21 for controlling the conduction of the channel 708. One end of the moving block 709 is wedge-shaped, and a fourth spring 709 is fixedly installed on the side wall of the moving block 709. The spring 710 is used to drive the moving block 709 to move toward the first sealing groove 703. A through groove 711 is provided on the surface of the moving block 709 for the passage of insulating liquid. When the first sealing ring 701 is inserted into the first sealing groove 703, the moving block 709 is first squeezed to move the squeezing block 709 toward the second sealing groove 704, so that the through groove 711 is connected to the channel 708. As the first sealing ring 701 continues to be inserted, the second piston 706 will be squeezed downward, thereby injecting the insulating liquid in the cavity 705 from the channel 708 into the space between the first sealing ring 701 and the second sealing ring 702, further sealing the front shell 21 and the rear shell 22, preventing the arc generated inside the lighting lamp 2 from igniting the combustible gas in the external air, and ensuring the safe use of the lighting lamp 2.

[0049] In a preferred embodiment, during installation, the first sealing ring 701 and the second sealing ring 702 on the side wall of the rear shell 22 are respectively aligned with the first sealing groove 703 and the second sealing groove 704 on the surface of the front shell 21 and inserted. First, the moving block 709 is squeezed to move the moving block 709 toward the second sealing groove 704, so that the through groove 711 and the channel 708 are connected. As the first sealing ring 701 continues to be inserted, the second piston 706 will be squeezed downward, thereby injecting the insulating liquid in the cavity 705 from the channel 708 between the first sealing ring 701 and the second sealing ring 702, further sealing the front shell 21 and the rear shell 22, preventing the arc generated inside the lighting lamp 2 from igniting the combustible gas in the external air, and ensuring the safe use of the lighting lamp 2.

[0050] Specifically, the working principle of this emergency lighting fixture with an alarm function is as follows: during installation, the first sealing ring 701 and the second sealing ring 702 on the side wall of the rear shell 22 are respectively aligned with the first sealing groove 703 and the second sealing groove 704 on the surface of the front shell 21 and inserted. First, the moving block 709 is squeezed to move the moving block 709 toward the second sealing groove 704, so that the through groove 711 and the channel 708 are connected. As the first sealing ring 701 continues to be inserted, the second piston 706 will be squeezed downward, thereby injecting the insulating liquid in the cavity 705 from the channel 708 between the first sealing ring 701 and the second sealing ring 702, further sealing the front shell 21 and the rear shell 22, preventing the arc generated inside the lighting lamp 2 from igniting the combustible gas in the external air, and ensuring the safe use of the lighting lamp 2.

[0051] The lighting lamp 2 usually uses LED as a light source, which has relatively low heat and emits less heat. The surface temperature during operation is generally around 60 degrees Celsius to 80 degrees Celsius, and the nickel-chromium alloy / copper alloy bimetallic strip 503 is suitable for use in an environment of 80 degrees Celsius to 200 degrees Celsius. Therefore, when the surface temperature of the lighting lamp 2 is higher than 80 degrees Celsius, it can be determined that there is a thermal abnormality, and there may be an accident such as a fire. The bimetallic strip 503 will bend, and the copper alloy will bend to the left, causing the bimetallic strip 503 to bend toward the copper alloy side, pushing the push plate 505 to drive the first contact 508 to move synchronously to the left, and the first spring 511 is compressed until the first contact 508 and the second contact 510 are closed. The buzzer 502 and the power supply form a complete circuit, issuing an audible alarm, realizing a fire alarm, and ensuring the normal use of the lighting lamp 2 in an emergency situation.

[0052] When the surface temperature of the lighting lamp 2 is higher than 80 degrees Celsius and is determined to be a thermal anomaly, which may lead to an accident such as a fire, the bimetallic strip 503 pushes the push plate 505 to move leftward. The driving block 613 can drive the wedge block 612 to drive the first piston 609 upward, so that the one-way valve 614 is opened, and the acetic acid solution in the solvent chamber 608 is injected into the reaction box 607. The acetic acid solution reacts with sodium bicarbonate to produce a large amount of carbon dioxide gas, which is injected into the pressure box 601 through the first air pipe 616 and the second air pipe 617, pushing the push block 603 to move leftward, so that the through hole 605 and the pipeline between the nozzle 602 and the pressure box 601 are opened, so that liquid nitrogen can enter the nozzle 602 and be sprayed from the nozzle to the surface of the lighting lamp 2 to perform emergency heat dissipation on the lighting lamp 2, ensuring the emergency use of the lighting lamp 2 under high temperature conditions.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An emergency lighting fixture with an alarm function, characterized in that: The invention comprises a mounting frame (1), a lighting lamp (2) and an alarm mechanism (5), wherein the lighting lamp (2) is mounted in the inner cavity of the mounting frame (1), the lighting lamp (2) is divided into two parts, a front shell (21) and a rear shell (22), the front shell (21) and the rear shell (22) being connected by screws, and the alarm mechanism (5) is mounted on the surface of the rear shell (22) for issuing a fire alarm, and the alarm mechanism (5) comprises: An action box (501), the action box (501) is fixedly mounted on the surface of the rear housing (22), and a buzzer (502) is mounted on the side wall of the action box (501) for sounding an alarm; A bimetallic strip (503), the bimetallic strip (503) being installed in the inner cavity of the action box (501), the left portion of the bimetallic strip (503) being made of a copper alloy material, and the bimetallic strip (503) being made of a nickel-chromium alloy material; Guide rods (504), the guide rods (504) are symmetrically fixedly mounted in the inner cavity of the action box (501), a push plate (505) is slidably mounted between the two guide rods (504), the push plate (505) is closely attached to the side wall of the copper alloy material end of the bimetallic strip (503), and a push rod (506) is fixedly mounted on the side wall of the push plate (505); An emergency mechanism (6) is installed on the surface of the lighting lamp (2) for emergency heat dissipation of the lighting lamp (2); the emergency mechanism (6) comprises a pressure box (601) and a nozzle (602); the pressure box (601) is fixedly installed on the surface of the front shell (21); the pressure box (601) is filled with liquid nitrogen; and the nozzle (602) is installed on the surface of the front shell (21); A reaction box (607) is fixedly mounted on the surface of the action box (501), wherein sodium bicarbonate is stored in the reaction box (607), a solvent chamber (608) is provided in the inner cavity of the action box (501), wherein the solvent chamber (608) is filled with acetic acid solution, a first piston (609) is slidably mounted in the solvent chamber (608), and a second spring (610) is mounted in the solvent chamber (608), wherein one end of the second spring (610) is fixedly connected to the action box (501), and the other end of the second spring (610) is fixedly connected to the first piston (609), and is used for driving the first piston (609) to move downward; A connecting rod (611) is fixedly mounted on the bottom of the first piston (609), a wedge block (612) is fixedly mounted on the bottom of the connecting rod (611), and a driving block (613) is fixedly mounted on the surface of the push rod (506). The driving block (613) is wedge-shaped and is used to drive the driving block (613) to move upward; A one-way valve (614) is installed on the surface of the solvent chamber (608), the other end of the one-way valve (614) is connected to the reaction box (607), a filter plate (615) is installed in the inner cavity of the reaction box (607), one end of the reaction box (607) is connected to a first air pipe (616), the surface of the pressure box (601) is connected to a second air pipe (617), and a joint (618) is installed between the first air pipe (616) and the second air pipe (617).

2. The emergency lighting fixture with alarm function according to claim 1, characterized in that: A lampshade (3) is mounted on the surface of the lighting lamp (2); a plurality of heat sinks (4) are mounted between the mounting frame (1) and the front shell (21); a first substrate (507) is fixedly mounted on one end of the push rod (506); a first contact (508) is mounted on a side wall of the first substrate (507); and the first contact (508) is electrically connected to the buzzer (502).

3. The emergency lighting fixture with alarm function according to claim 2, characterized in that: A second substrate (509) is fixedly installed in the inner cavity of the action box (501), a second contact (510) is installed on the side wall of the second substrate (509), and the second contact (510) is electrically connected to an external power supply. A first spring (511) is installed between the first substrate (507) and the second substrate (509) for driving the push plate (505) to be tightly attached to the side wall of the copper alloy material end of the bimetallic strip (503).

4. The emergency lighting fixture with alarm function according to claim 1, characterized in that: A pipe is connected between the nozzle (602) and the pressure box (601), and a plurality of spray holes are provided on the side wall of the nozzle (602) for spraying liquid nitrogen onto the surface of the lighting lamp (2) for emergency heat dissipation.

5. The emergency lighting fixture with alarm function according to claim 4, characterized in that: A push block (603) is slidably mounted in the inner cavity of the pressure box (601), and a sealing plate (604) is fixedly mounted on the side wall of the push block (603) for blocking the conduction between the pressure box (601) and the nozzle (602). A through hole (605) is provided on the surface of the sealing plate (604), and a tension spring (606) is symmetrically mounted in the inner cavity of the pressure box (601), one end of the tension spring (606) is fixedly connected to the push block (603), and the other end of the tension spring (606) is fixedly connected to the pressure box (601), for driving the sealing plate (604) to move.

6. The emergency lighting fixture with alarm function according to claim 1, characterized in that: An isolation mechanism (7) is installed between the front shell (21) and the rear shell (22) for isolating the lighting lamp (2) from the outside world. The isolation mechanism (7) comprises a first sealing ring (701) and a second sealing ring (702). The first sealing ring (701) and the second sealing ring (702) are fixedly installed on the side wall of the rear shell (22). A first sealing groove (703) and a second sealing groove (704) are provided on the surface of the front shell (21) for accommodating the first sealing ring (701) and the second sealing ring (702), respectively.

7. The emergency lighting fixture with alarm function according to claim 6, characterized in that: The front shell (21) is provided with a cavity (705), the cavity (705) is filled with insulating liquid, a second piston (706) is slidably installed in the cavity (705) for squeezing the insulating liquid, a third spring (707) is installed in the cavity (705), one end of the third spring (707) is fixedly connected to the front shell (21), and the other end of the third spring (707) is fixedly connected to the second piston (706) for driving the second piston (706) to move toward the rear shell (22), and the inner cavity of the front shell (21) is provided with a cavity (705). A channel (708) is provided, one end of the channel (708) is connected to the cavity (705) for the passage of insulating liquid, a moving block (709) is slidably installed in the inner cavity of the front shell (21) for controlling the conduction of the channel (708), one end of the moving block (709) is wedge-shaped, a fourth spring (710) is fixedly installed on the side wall of the moving block (709) for driving the moving block (709) to move toward the first sealing groove (703), and a through groove (711) is provided on the surface of the moving block (709) for the passage of insulating liquid.

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