Light emitting device, outdoor lighting device, and optical warning device

Abstract

The application provides a light emitting device, an outdoor lighting device and an optical alarm device, which comprise a resonant tube, a thermoacoustic compressor and a light emitting body. The thermoacoustic compressor is arranged at one end of the resonant tube, and the light emitting body is arranged at the other end of the resonant tube. The thermoacoustic compressor can make the gas at the position where the thermoacoustic compressor is arranged of the resonant tube vibrate, so as to generate sound waves, the sound waves propagate along the axial direction of the resonant tube, when the sound waves propagate to the position of the light emitting body, the light emitting body is driven to vibrate, and the light emitting body emits light when the light emitting body vibrates, because the light emitting body uses a mechanoluminescent material. The light emitting device provided by the application converts heat energy into mechanical energy in the form of sound waves through the thermoacoustic effect, and then drives the mechanoluminescent material to vibrate, and the mechanoluminescent material converts the mechanical energy into light through the mechanoluminescent effect. Because the light emitting device provided by the application has almost no moving parts, the light emitting device has the advantages of simple structure, high reliability and long service life.

Description

Technical Field

[0001] This invention relates to the field of thermo-optical conversion device technology, and more particularly to a light-emitting device, outdoor lighting equipment, and optical alarm device. Background Technology

[0002] Currently, most light-emitting devices rely on electrical energy, which is generated by driving generators using hydropower, thermal energy, or wind power. Whether it's hydropower, thermal energy, or wind power, all require driving generators to generate electricity, which in turn powers the light-emitting device to emit light.

[0003] However, generators have a large number of moving parts and a complex structure. In addition, wear and tear during operation can cause generators to malfunction frequently, which in turn reduces the reliability of light-emitting devices that use electrical energy to drive light. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] Therefore, the present invention provides a light-emitting device, comprising:

[0006] resonant tube;

[0007] A thermoacoustic compressor is disposed inside the resonant tube. The thermoacoustic compressor is used to convert thermal energy into mechanical energy in the form of sound waves, and the sound waves can propagate along the axial direction of the resonant tube.

[0008] A light-emitting body is disposed inside the resonant tube and on one side of the thermoacoustic compressor. The light-emitting body is a mechanoluminescent material and can vibrate and emit light under the drive of the sound waves.

[0009] According to the light-emitting device provided by the present invention, the thermoacoustic compressor includes a first heat exchanger, a regenerator and a second heat exchanger, wherein the first heat exchanger, the regenerator and the second heat exchanger are arranged sequentially along the axial direction of the resonant tube, and the heat exchange temperature of the first heat exchanger is higher than that of the second heat exchanger.

[0010] According to the light-emitting device provided by the present invention, the first heat exchanger includes:

[0011] A first heat exchanger is disposed inside the resonant tube. The first heat exchanger includes a first inner cavity and a first outer cavity. The first outer cavity connects the two ends of the first heat exchanger along the axial direction of the resonant tube.

[0012] A hot fluid conduit is connected to the first inner cavity and is used to introduce and exit hot fluid into the first inner cavity.

[0013] According to the light-emitting device provided by the present invention, a flow control valve is provided on the hot fluid pipeline.

[0014] According to the light-emitting device provided by the present invention, the second heat exchanger includes:

[0015] The second heat exchanger is disposed inside the resonant tube. The second heat exchanger includes a second inner cavity and a second outer cavity. The second outer cavity connects the two ends of the second heat exchanger along the axial direction of the resonant tube.

[0016] A cold fluid conduit is connected to the second inner cavity, and the cold fluid conduit is used to introduce and exit cold fluid into the second inner cavity.

[0017] According to the light-emitting device provided by the present invention, the regenerator is a parallel flow channel structure, a porous foam structure, or a stacked wire mesh structure.

[0018] According to the light-emitting device provided by the present invention, the position of the light-emitting body in the resonant tube is made of transparent material.

[0019] According to the light-emitting device provided by the present invention, the material of the light-emitting body is an organic mechanoluminescent material or an inorganic mechanoluminescent material.

[0020] The present invention also provides an outdoor lighting device, including the light-emitting device as described above.

[0021] The present invention also provides an optical alarm device, including the light-emitting device as described above.

[0022] The light-emitting device provided by this invention includes a resonant tube, a thermoacoustic compressor, and a light-emitting element. Both the thermoacoustic compressor and the light-emitting element are disposed within the resonant tube, and are arranged along the axial direction of the resonant tube. The thermoacoustic compressor causes the gas at the location of the thermoacoustic compressor within the resonant tube to oscillate, thereby generating sound waves. These sound waves propagate along the axial direction of the resonant tube. When the sound waves reach the location of the light-emitting element, they drive the light-emitting element to vibrate. Since the light-emitting element uses a mechanoluminescent material, it emits light when subjected to force and vibrates. The light-emitting device provided by this invention utilizes the thermoacoustic effect to convert thermal energy into mechanical energy in the form of sound waves for propagation, thereby driving the mechanoluminescent material to vibrate. The mechanoluminescent material then converts mechanical energy into light using the mechanoluminescence effect. Because the light-emitting device provided by this invention has almost no moving parts, it has the advantages of simple structure, high reliability, and long lifespan.

[0023] Furthermore, the outdoor lighting equipment and optical alarm equipment provided by the present invention have the same advantages as described above because they are both equipped with the light-emitting device as described above. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the light-emitting device provided in an embodiment of the present invention;

[0026] Figure 2 This is a graph of gas oscillation provided in an embodiment of the present invention;

[0027] Figure 3 This is a deformation diagram of the light-emitting body provided in an embodiment of the present invention;

[0028] Figure label:

[0029] 100: Resonant tube; 200: Thermoacoustic compressor; 211: First heat exchanger; 212: Hot fluid pipe; 213: Flow control valve; 221: Second heat exchanger; 222: Cold fluid pipe; 230: Regenerator; 300: Light source. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] The following is combined Figures 1-3 The present invention describes a light-emitting device, an outdoor lighting device, and an optical alarm device.

[0032] An embodiment of the present invention provides a light-emitting device, including a resonant tube 100, a thermoacoustic compressor 200, and a light emitter 300. Both the thermoacoustic compressor 200 and the light emitter 300 are disposed within the resonant tube 100 and are arranged along the axial direction of the resonant tube 100. The thermoacoustic compressor 200 converts thermal energy into sound waves. The sound waves propagate along the axial direction of the resonant tube 100, which ensures the phase of the sound field. The sound waves drive the light emitter 300 to vibrate and emit light, thus realizing the conversion between heat, sound, and light.

[0033] Among them, the thermoacoustic compressor 200 is a heat-work conversion device based on the thermoacoustic effect, which essentially converts heat into mechanical energy in the form of sound waves for power output.

[0034] The light source 300 uses a mechanoluminescent material. When subjected to mechanical energy such as impact, the mechanoluminescent material will produce a mechanoluminescence effect, that is, it will produce light emission under the action of mechanical energy, which is essentially the conversion of mechanical energy into light energy.

[0035] In related technologies, lighting equipment mostly relies on electric power. It typically uses high-temperature heat sources such as combustion heat to heat the working fluid, which in turn drives a linear or rotary motor to generate electricity, and then uses the electricity to drive the lighting equipment to emit light.

[0036] This type of heat-electric-light lighting requires the use of linear or rotary motors to generate electricity. On the one hand, generators have many moving parts, making their structure complex and inconvenient to carry. On the other hand, the heat source used to heat the working fluid needs to be a high-temperature heat source, and it cannot work with medium- or low-quality heat sources.

[0037] The thermoacoustic compressor 200 in the light-emitting device provided by this invention has no moving parts, thus possessing advantages such as simple structure, high reliability, and long lifespan. Furthermore, the thermoacoustic compressor 200 has good temperature adaptability to heat sources, operating within a wide temperature range. It can operate not only under high-temperature heat sources but also under medium- to low-quality heat sources.

[0038] This invention addresses the shortcomings of existing technologies by providing a light-emitting device that operates based on the thermoacoustic effect and mechanoluminescence effect, achieving a heat-sound-light conversion. Specifically, it utilizes the thermoacoustic effect to convert thermal energy into mechanical energy in the form of sound waves. This mechanical energy then acts on the mechanoluminescent material, converting mechanical energy into light energy. Compared to traditional lighting methods, the key feature of this invention is that it eliminates the need for a generator to convert the mechanical energy converted from thermal energy into electrical energy, which then drives the lighting device. Instead, it directly utilizes the mechanical energy converted from thermal energy into sound waves to drive the mechanoluminescent material to emit light.

[0039] In one embodiment of the present invention, the thermoacoustic compressor 200 includes a first heat exchanger, a second heat exchanger, and a regenerator 230, wherein the first heat exchanger, the regenerator 230, and the second heat exchanger are arranged within the resonant tube 100 along the axial direction of the resonant tube 100.

[0040] For example, see Figure 1 The first heat exchanger, the regenerator 230, and the second heat exchanger are arranged sequentially from left to right at the left end of the resonant tube 100, and the light emitter 300 is arranged at the right end of the resonant tube 100. The temperature of the first heat exchanger is higher than that of the second heat exchanger.

[0041] When a hot fluid flows through the first heat exchanger, it exchanges heat with the gas flowing through the resonant tube 100. When a cold fluid flows through the second heat exchanger, it exchanges heat with the gas flowing through the resonant tube 100. As a result, a high-temperature zone and a low-temperature zone are formed at both ends of the regenerator 230, and a temperature gradient is established in the gas within the regenerator 230. When this temperature gradient exceeds the oscillation threshold, the working gas in the resonant tube 100 will oscillate. The sound waves generated by the oscillation will propagate along the axial direction of the resonant tube 100. When the sound waves reach the light source 300, they will drive the light source 300 to vibrate back and forth, thereby generating light energy.

[0042] In this embodiment, the first heat exchanger, the regenerator 230, and the second heat exchanger are located at the left end of the resonant tube 100 and arranged sequentially from left to right. Of course, the first heat exchanger, the regenerator 230, and the second heat exchanger can also be located at other positions in the resonant tube 100 and can also be arranged sequentially from right to left. That is, the embodiments of this application do not limit the location and arrangement direction of the first heat exchanger, the regenerator 230, and the second heat exchanger in the resonant tube 100.

[0043] See Figure 3 When the light-emitting body 300 is in the equilibrium position, i.e., states 1 and 3 in the figure, the net external force on the light-emitting body 300 is 0, and the light-emitting body 300 does not emit light. When the light-emitting body 300 deviates from the equilibrium position, i.e., states 2 and 4 in the figure, the net external force on the light-emitting body 300 is not equal to 0, and the light-emitting body 300 emits light.

[0044] The frequency of the sound wave generated by the thermoacoustic compressor 200 is determined by the speed of sound and the length of the resonant tube 100. Theoretically, the frequency range of the output sound wave can be between a few hertz and thousands of hertz. When the frequency reaches 75 hertz or higher, the human eye cannot perceive the flicker of light. When the frequency reaches 85 hertz or higher, the human eye has no flickering sensation at all.

[0045] In one embodiment of the present invention, the first heat exchanger may include a first heat exchanger 211 and a hot fluid conduit 212.

[0046] The first heat exchanger 211 can be disposed inside the resonant tube 100. The first heat exchanger 211 includes a first inner cavity and a first outer cavity.

[0047] The first inner cavity is supplied with heat fluid, and the heat fluid pipe 212 is connected to the first inner cavity. The heat fluid pipe 212 is used to introduce heat fluid into the first inner cavity and exit it from the first inner cavity, so as to achieve the effect of heat fluid flowing through the first inner cavity.

[0048] The first outer cavity is connected to the interior of the resonant tube 100, and the gas inside the resonant tube 100 can flow through the first outer cavity through the first heat exchanger 211 at both ends along the axial direction of the resonant tube 100.

[0049] In use, the hot fluid supply device can introduce hot flue gas, heat transfer oil or hot water and other hot fluids into the first inner cavity of the first heat exchanger 211 through the hot fluid pipe 212. After the hot fluid flows through the first heat exchanger 211, it is introduced into the hot fluid recovery device through the hot fluid pipe 212.

[0050] When the hot fluid flows through the first inner cavity, the hot fluid exchanges heat with the gas in the resonant tube 100 through the wall between the first inner cavity and the first outer cavity, providing heat to the gas in the region corresponding to the resonant tube 100 and the first heat exchanger 211.

[0051] In one embodiment of the present invention, the second heat exchanger 221 may be disposed inside the resonant tube 100, and the second heat exchanger 221 includes a second inner cavity and a second outer cavity.

[0052] The second inner cavity is for the flow of cold fluid. The cold fluid pipe 222 is connected to the second inner cavity. The cold fluid pipe 222 is used to introduce the cold fluid into the second inner cavity and exit it from the second inner cavity, so as to achieve the effect of cold fluid flowing through the second inner cavity.

[0053] The second outer cavity is connected to the interior of the resonant tube 100, and the gas inside the resonant tube 100 can flow through the second outer cavity through the second heat exchanger 221 at both ends along the axial direction of the resonant tube 100.

[0054] In use, the cold fluid supply device can introduce cold fluids such as cold water or cold air into the second inner cavity of the second heat exchanger 221 through the cold fluid pipe 222. After the cold fluid flows through the second heat exchanger 221, it is introduced into the cold fluid recovery device through the cold fluid pipe 222.

[0055] When the cold fluid flows through the second inner cavity, it exchanges heat with the gas in the resonant tube 100 through the wall between the second inner cavity and the second outer cavity, providing cooling for the gas in the region corresponding to the resonant tube 100 and the second heat exchanger 221.

[0056] In one embodiment of the present invention, a flow control valve 213 is also provided on the hot fluid pipe 212 to control the heat exchange of the first heat exchanger 211.

[0057] Within the elastic deformation limit of the light-emitting body 300, the luminous intensity of the light-emitting body 300 exhibits a regular relationship with the stress magnitude. Therefore, a flow control valve 213 is set to control the flow rate of the hot fluid, thereby affecting the temperature of the first heat exchanger. Since the acoustic vibration intensity is related to the temperature difference in the regenerator 230, the temperature change of the first heat exchanger will affect the force acting on the light-emitting body 300, thereby adjusting the luminous intensity.

[0058] In one embodiment of the present invention, the mechanoluminescent material used in the light emitter 300 can be an organic mechanoluminescent material or an inorganic mechanoluminescent material. Organic light-emitting materials can be EuD4TEA, a complex of the rare earth metal Eu. Inorganic light-emitting materials offer a wider range of selectable emission colors, such as CnZnOS:Mn (red light), ZnS:Mn (yellow light), and SrAl2O4:Eu (green light).

[0059] In one embodiment of the present invention, the end of the resonant tube 100 where the light emitter 300 is disposed can be made of a transparent material to facilitate light output.

[0060] In one embodiment of the present invention, the regenerator 230 may be a parallel flow channel structure, a porous foam structure, or a stacked wire mesh structure, etc. The shape and material of the regenerator 230 are selected based on the standard of allowing gas to pass through and facilitating heat exchange.

[0061] Since most lighting equipment in the current technology relies on electricity, the presence of a generator makes it inconvenient to carry and unsuitable for use in places without centralized power supply, such as in the wild.

[0062] In response, the present invention provides an outdoor lighting device equipped with a light-emitting device as described above. Outdoors, hot fluids such as hot water can be used to provide a heat source for the thermoacoustic compressor 200, and outdoor air can provide a cold source for the thermoacoustic compressor 200, thereby causing the gas inside the resonant tube 100 to vibrate and drive the light-emitting body 300 to emit light under the action of sound waves.

[0063] The outdoor lighting device provided by this invention solves the problem that existing lighting methods rely on generators, which are complex in structure and inconvenient to carry. Existing generators often use moving parts to participate in heat-work conversion, resulting in complex structures and low reliability. This invention has almost no moving parts, a simple structure, is portable, and has high reliability, making it suitable for field use.

[0064] Furthermore, outdoor lighting equipment such as flashlights requires batteries to power their illumination, but these batteries have limited capacity and need to be replaced periodically. The outdoor lighting equipment provided in this application can emit light without batteries and can operate continuously as long as there is a heat source, solving many problems associated with the need to replace batteries in related technologies.

[0065] Currently, in the field of temperature monitoring, temperature alarm systems are commonly used to monitor the temperature of equipment. When the temperature rises abnormally, the alarm system can sound an alarm. However, existing alarm systems require the use of a thermometer to detect the temperature of the equipment and to send the temperature signal to the alarm device through a signal acquisition device. When the temperature is abnormal, the alarm light of the alarm device will sound an alarm. This type of temperature alarm system has many components, which makes its structure complex and significantly reduces its reliability.

[0066] In response, the present invention provides an optical alarm device, which is equipped with a light-emitting device as described above. The heat of the device whose temperature needs to be monitored can be introduced into the thermoacoustic compressor 200 of the light-emitting device. When the temperature rises and the temperature gradient in the regenerator 230 of the thermoacoustic compressor 200 reaches the oscillation critical value, the working fluid in the system will oscillate, thereby driving the light-emitting body 300 to emit light. The light of the light-emitting body 300 can be used as an alarm signal.

[0067] The optical alarm device provided by this invention does not require a thermometer or signal acquisition equipment. It only needs to use the light-emitting device described above to emit light when the temperature is abnormal, thereby issuing an alarm signal. Its structure is simple, its cost is low, and its reliability is greatly improved.

[0068] Furthermore, in fields with abundant waste heat resources, such as factories and transportation, waste heat resources can be converted into light energy through the light-emitting device provided by this invention, which can effectively reduce electricity consumption and improve energy utilization.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light emitting device, characterized by, include: Resonant tube (100); A thermoacoustic compressor (200) is disposed inside the resonant tube (100). The thermoacoustic compressor (200) is used to convert thermal energy into mechanical energy in the form of sound waves, and the sound waves can propagate along the axial direction of the resonant tube (100). The light-emitting body (300) is disposed inside the resonant tube (100) and is disposed on one side of the thermoacoustic compressor (200) along the axial direction of the resonant tube (100). The light-emitting body (300) is a mechanoluminescent material and can vibrate and emit light under the drive of the sound wave.

2. The light emitting device of claim 1, wherein The thermoacoustic compressor (200) includes a first heat exchanger, a regenerator (230), and a second heat exchanger. The first heat exchanger, the regenerator (230), and the second heat exchanger are arranged sequentially along the axial direction of the resonant tube (100), and the heat exchange temperature of the first heat exchanger is higher than that of the second heat exchanger.

3. The light emitting device of claim 2, wherein The first heat exchanger includes: The first heat exchanger (211) is disposed inside the resonant tube (100). The first heat exchanger (211) includes a first inner cavity and a first outer cavity. The first outer cavity connects the two ends of the first heat exchanger (211) along the axial direction of the resonant tube (100). A hot fluid conduit (212) is connected to the first inner cavity and is used to introduce and export hot fluid into and out of the first inner cavity.

4. The light emitting device of claim 3, wherein A flow control valve (213) is installed on the hot fluid pipeline (212).

5. The light emitting device of claim 2, wherein The second heat exchanger includes: The second heat exchanger (221) is disposed inside the resonant tube (100). The second heat exchanger (221) includes a second inner cavity and a second outer cavity. The second outer cavity connects the two ends of the second heat exchanger (221) along the axial direction of the resonant tube (100). A cold fluid conduit (222) is connected to the second inner cavity and is used to introduce and export cold fluid into and out of the second inner cavity.

6. The light emitting device according to any one of claims 2 to 5, wherein The regenerator (230) has a parallel flow channel structure, a porous foam structure, or a stacked wire mesh structure.

7. The light emitting device of claim 1, wherein The resonant tube (100) is positioned with the light-emitting element (300) in a transparent material.

8. The light emitting device of claim 1, wherein The material of the light emitter (300) is an organic mechanoluminescent material or an inorganic mechanoluminescent material.

9. An outdoor lighting apparatus, characterized by Includes the light-emitting device as described in any one of claims 1 to 8.

10. An optical warning device, characterized in that Includes the light-emitting device as described in any one of claims 1 to 8.

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