Light-emitting device, outdoor lighting equipment and optical alarm equipment

Abstract

The invention provides a light-emitting device, outdoor lighting equipment and optical alarm equipment. The light-emitting device comprises a resonance tube, a thermoacoustic compressor and a light-emitting body. The thermoacoustic compressor is arranged at one end of the resonance tube, and the luminous body is arranged at the other end of the resonance tube. According to the thermoacoustic compressor, gas at the position, where the thermoacoustic compressor is arranged, of the resonance tube can oscillate, so that sound waves are generated, the sound waves are transmitted in the axial direction of the resonance tube, when the sound waves are transmitted to the position of the light emitting body, the light emitting body is driven to vibrate, and due to the fact that the light emitting body is made of mechanoluminescent materials, the light emitting body can emit light when vibrating. According to the light-emitting device provided by the invention, heat energy is converted into mechanical energy in a sound wave form by utilizing a thermo-acoustic effect to be transmitted, then the electroluminescent material is driven to vibrate, and the mechanoluminescent material converts the mechanical energy into light by utilizing a mechanoluminescent effect. The light-emitting device provided by the invention is almost free of moving parts, so that the light-emitting device has the advantages of simple structure, high reliability and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal-light conversion devices, and in particular to a light-emitting device, outdoor lighting equipment and optical alarm equipment. Background Art

[0002] At present, most light-emitting devices rely on electric energy to drive them, and electric energy is mostly generated by driving generators using hydraulic, thermal, wind, etc. Whether it is hydraulic, thermal or wind energy, it needs to drive the generator to move, thereby generating electric energy, and finally driving the light-emitting device to emit light.

[0003] However, the generator is provided with a large number of moving parts and has a complex structure. In addition, due to wear and tear during movement, the generator often fails, which in turn reduces the reliability of the light-emitting device that uses electrical energy to drive the 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] To this end, the present invention provides a light emitting device, comprising:

[0006] Resonance tube;

[0007] A thermoacoustic compressor, the thermoacoustic compressor being arranged in the resonance tube, the thermoacoustic compressor being used for converting thermal energy into mechanical energy in the form of sound waves, and the sound waves being able to propagate along the axial direction of the resonance tube;

[0008] The light-emitting body is arranged in the resonance 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 wave.

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

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

[0011] A first heat exchanger, the first heat exchanger is disposed in the resonance tube, the first heat exchanger comprises a first inner cavity and a first outer cavity, the first outer cavity communicates with two ends of the first heat exchanger along the axial direction of the resonance tube;

[0012] A thermal fluid pipeline is connected to the first inner cavity, and is used to introduce and export thermal fluid into and out of the first inner cavity.

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

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

[0015] a second heat exchanger, the second heat exchanger being disposed in the resonance tube, the second heat exchanger comprising a second inner cavity and a second outer cavity, the second outer cavity being connected to two ends of the second heat exchanger along the axial direction of the resonance tube;

[0016] A cold fluid pipeline is connected to the second inner cavity, and is used to introduce and export cold fluid into and out of the second inner cavity.

[0017] According to the light-emitting device provided by the present invention, the heat 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 where the light-emitting body is arranged in the resonance 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 myoluminescent material or an inorganic myoluminescent material.

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

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

[0022] The light-emitting device provided by the present invention includes a resonance tube, a thermoacoustic compressor and a light-emitting body. The thermoacoustic compressor and the light-emitting body are both arranged in the resonance tube, and the thermoacoustic compressor and the light-emitting body are arranged along the axial direction of the resonance tube. The thermoacoustic compressor can cause the gas at the position where the thermoacoustic compressor is arranged in the resonance tube to oscillate, thereby generating sound waves. The sound waves propagate along the axial direction of the resonance tube. When the sound waves propagate to the position of the light-emitting body, they drive the light-emitting body to vibrate. Since the light-emitting body uses a mesoluminescent material, the light-emitting body will emit light when it is vibrated by force. The light-emitting device provided by the present invention utilizes the thermoacoustic effect to convert thermal energy into mechanical energy in the form of sound waves for propagation, thereby driving the mesoluminescent material to vibrate. The mesoluminescent material utilizes the mesoluminescent effect to convert mechanical energy into light. Since the light-emitting device provided by the present invention has almost no moving parts, it has the advantages of simple structure, high reliability and long service life.

[0023] Furthermore, in the outdoor lighting equipment and optical alarm equipment provided by the present invention, since both are provided with the light-emitting device as described above, they have the same advantages as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

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

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

[0028] Reference numerals:

[0029] 100: resonance tube; 200: thermoacoustic compressor; 211: first heat exchanger; 212: hot fluid pipeline; 213: flow control valve; 221: second heat exchanger; 222: cold fluid pipeline; 230: regenerator; 300: luminous body. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0031] Combine the following Figure 1-Figure 3 The lighting device, outdoor lighting equipment and optical warning device of the present invention are described.

[0032] An embodiment of the present invention provides a light-emitting device, including a resonance tube 100, a thermoacoustic compressor 200, and a light-emitting body 300. The thermoacoustic compressor 200 and the light-emitting body 300 are both arranged in the resonance tube 100, and both are arranged along the axial direction of the resonance tube 100. The thermoacoustic compressor 200 is used to convert thermal energy into sound waves, and the sound waves propagate in the resonance tube 100 along the axial direction of the resonance tube 100. The resonance tube 100 is used to ensure the phase of the sound field, and the sound waves are used to drive the light-emitting body 300 to vibrate and emit light, thereby realizing the conversion of heat, sound, and light.

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

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

[0035] In the related technology, lighting equipment mostly relies on electric energy to drive, usually using 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 drives the lighting equipment through electricity to emit light.

[0036] This type of thermal-electric-optical lighting method requires the use of a linear or rotary motor to generate electricity. On the one hand, the generator has many moving parts, its structure is highly complex, and it is not easy 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 will not work for medium or low-quality heat sources.

[0037] In the light-emitting device provided by the present invention, the thermoacoustic compressor 200 has no moving parts, and therefore has the advantages of simple structure, high reliability, long life, etc. In addition, the thermoacoustic compressor 200 has good adaptability to the temperature of the heat source and can work in a wide temperature range. It can work not only under high-temperature heat sources, but also under medium and low-quality heat sources.

[0038] In view of the deficiencies of the prior art, the present invention provides a light-emitting device, which works based on the thermoacoustic effect and the mechanoluminescent effect to achieve the conversion of heat, sound and light. Specifically, the thermoacoustic effect is used to achieve the conversion of thermal energy into mechanical energy in the form of sound waves, and the mechanical energy acts on the mechanoluminescent material to achieve the conversion of mechanical energy into light energy. Compared with traditional lighting forms, the outstanding feature of the present invention is that there is no need for a generator to convert the mechanical energy converted from thermal energy into electrical energy, and then the electrical energy drives the lighting device to emit light, but directly uses the mechanical energy converted from thermal energy into the form of 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 , and the first heat exchanger, the regenerator 230 and the second heat exchanger are arranged in the resonance tube 100 along the axial direction of the resonance tube 100 .

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

[0041] When hot fluid flows through the first heat exchanger, the first heat exchanger exchanges heat with the gas flowing through the first heat exchanger in the resonance tube 100, and when cold fluid flows through the second heat exchanger, the second heat exchanger exchanges heat with the gas flowing through the second heat exchanger in the resonance tube 100. As a result, the areas at both ends of the regenerator 230 form a high temperature zone and a low temperature zone, and then the gas in the regenerator 230 will establish a temperature gradient. When the temperature gradient exceeds the oscillation critical value, the gas working medium in the resonance tube 100 will oscillate, and the sound waves generated by the oscillation will propagate along the axial direction of the resonance tube 100. When the sound waves propagate to the light emitter 300, the sound waves will drive the light emitter 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 arranged at the left end of the resonance tube 100, and are arranged sequentially from left to right. Of course, the first heat exchanger, the regenerator 230 and the second heat exchanger can also be arranged at other positions of the resonance tube 100, and can also be arranged sequentially from right to left, that is, the embodiment of the present application does not limit the setting position and arrangement direction of the first heat exchanger, the regenerator 230 and the second heat exchanger in the resonance tube 100.

[0043] See also Figure 3 When the luminous body 300 is in the equilibrium position, that is, the state 1 and 3 in the figure, the total external force on the luminous body 300 is 0, and the luminous body 300 does not emit light. When the luminous body 300 deviates from the equilibrium position, that is, the state 2 and 4 in the figure, the total external force on the luminous body 300 is not equal to 0, and the luminous body 300 emits light.

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

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

[0046] The first heat exchange body 211 may be disposed in the resonance tube 100 , and the first heat exchange body 211 includes a first inner cavity and a first outer cavity.

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

[0048] The first outer cavity is communicated with the interior of the resonance tube 100 , and the gas in the resonance tube 100 can flow through the first outer cavity and pass through both ends of the first heat exchange body 211 along the axial direction of the resonance tube 100 .

[0049] When in use, the hot fluid supply device can pass 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, the hot fluid 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 resonance tube 100 through the wall between the first inner cavity and the first outer cavity, providing heat for the gas in the area corresponding to the resonance tube 100 and the first heat exchange body 211.

[0051] In one embodiment of the present invention, the second heat exchange body 221 may be disposed in the resonance tube 100 , and the second heat exchange body 221 includes a second inner cavity and a second outer cavity.

[0052] The second inner cavity is used for the flow of cold fluid, and 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 lead it out from the second inner cavity, so as to achieve the effect of the cold fluid flowing through the second inner cavity.

[0053] The second outer cavity is communicated with the interior of the resonance tube 100 , and the gas in the resonance tube 100 can flow through the second outer cavity and pass through both ends of the second heat exchange body 221 along the axial direction of the resonance tube 100 .

[0054] When in use, the cold fluid supply device can pass cold fluid 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, the cold fluid 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, the cold fluid exchanges heat with the gas in the resonance tube 100 through the wall between the second inner cavity and the second outer cavity, providing coldness for the gas in the area corresponding to the resonance tube 100 and the second heat exchange body 221 .

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

[0057] Within the elastic deformation limit of the luminous body 300, the luminous intensity of the luminous body 300 and the stress magnitude show a regular relationship, so the flow control valve 213 is set to control the flow of the thermal fluid, thereby affecting the temperature of the first heat exchanger. Since the acoustic oscillation 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 luminous body 300, thereby adjusting the luminous intensity.

[0058] In one embodiment of the present invention, the mechanoluminescent material used in the luminous body 300 can be an organic mechanoluminescent material or an inorganic mechanoluminescent material. The organic luminescent material can be selected from EuD4TEA, a complex of the rare earth metal Eu. The inorganic luminescent material can have a wide range of luminescent 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 resonance tube 100 where the light emitting body 300 is disposed may 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 criteria of enabling gas to pass through and facilitating heat exchange.

[0061] Since lighting equipment in the prior art mostly relies on electrical energy, for equipment that generates electrical energy through a generator to drive the lighting equipment to emit light, the presence of the generator makes it inconvenient to carry and is not conducive to use in places without centralized power supply, such as the wild.

[0062] In this regard, the present invention provides an outdoor lighting device, which is provided with the light-emitting device as described above. Outdoors, hot water or other hot fluids 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 in the resonance tube 100 to vibrate, and driving the light-emitting body 300 to emit light under the action of sound waves.

[0063] The outdoor lighting device provided by the present invention solves the problem that the existing lighting methods rely on generators, while the existing generators are complex in structure and not portable. The existing generators mostly use moving parts to participate in the heat-work conversion, and have complex structures and low reliability. The present invention has almost no moving parts, a simple structure, a portable device, and high reliability, and is suitable for outdoor use.

[0064] In addition, outdoor lighting equipment such as flashlights require batteries to generate light, but the battery has limited power and needs to be replaced regularly. The outdoor lighting equipment provided by the present application does not require batteries to generate light, and can continue to work as long as there is a heat source, thus solving many problems caused by the need to replace batteries in related technologies.

[0065] At present, in the field of temperature monitoring, a temperature alarm system is usually used to monitor the temperature of the equipment. When the temperature rises abnormally, the alarm system can sound an alarm. However, the existing alarm system needs to use a thermometer to detect the temperature of the equipment and 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 sounds an alarm. This type of temperature alarm system has many components, which makes its structure complex and its reliability is greatly reduced.

[0066] In this regard, the present invention provides an optical alarm device, which is provided with the light-emitting device as described above, and can introduce the heat of the equipment that needs to monitor the temperature 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 critical value for starting oscillation, the working fluid in the system will oscillate, thereby driving the light-emitting body 300 to emit light, and the light of the light-emitting body 300 can be used as an alarm signal.

[0067] The optical alarm device provided by the present invention does not require the use of a thermometer and a signal acquisition device. It only needs to use the light-emitting device as described above to emit light when the temperature is abnormal, thereby sending out an alarm signal. It has a simple structure, low cost, and greatly improved reliability.

[0068] In addition, in areas with abundant waste heat resources, such as factories and transportation, the waste heat resources can be converted into light energy for utilization through the light-emitting device provided by the present invention, which can effectively reduce the consumption of electric energy and improve the utilization rate of energy.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light emitting device, characterized in that: include: Resonance tube (100); a thermoacoustic compressor (200), the thermoacoustic compressor (200) being arranged in the resonance tube (100), the thermoacoustic compressor (200) being used to convert thermal energy into mechanical energy in the form of sound waves, and the sound waves being capable of propagating along the axial direction of the resonance tube (100); A light-emitting body (300), wherein the light-emitting body (300) is arranged in the resonance tube (100), and the light-emitting body (300) is arranged on one side of the thermoacoustic compressor (200), and the light-emitting body (300) is a mechanoluminescent material, and the light-emitting body (300) can vibrate and emit light under the drive of the sound wave.

2. The light emitting device according to claim 1, characterized in that: The thermoacoustic compressor (200) comprises a first heat exchanger, a heat regenerator (230) and a second heat exchanger, wherein the first heat exchanger, the heat regenerator (230) and the second heat exchanger are arranged in sequence along the axial direction of the resonance tube (100), and the heat exchange temperature of the first heat exchanger is higher than the heat exchange temperature of the second heat exchanger.

3. The light emitting device according to claim 2, characterized in that: The first heat exchanger comprises: A first heat exchanger (211), the first heat exchanger (211) being arranged in the resonance tube (100), the first heat exchanger (211) comprising a first inner cavity and a first outer cavity, the first outer cavity being connected to two ends of the first heat exchanger (211) along the axial direction of the resonance tube (100); A thermal fluid pipeline (212), the thermal fluid pipeline (212) is connected to the first inner cavity, and the thermal fluid pipeline (212) is used to introduce and export thermal fluid into the first inner cavity.

4. The light emitting device according to claim 3, characterized in that: The hot fluid pipeline (212) is provided with a flow control valve (213).

5. The light emitting device according to claim 2, characterized in that: The second heat exchanger comprises: A second heat exchanger (221), the second heat exchanger (221) being arranged in the resonance tube (100), the second heat exchanger (221) comprising a second inner cavity and a second outer cavity, the second outer cavity being connected to two ends of the second heat exchanger (221) along the axial direction of the resonance tube (100); A cold fluid pipeline (222), the cold fluid pipeline (222) is connected to the second inner cavity, and the cold fluid pipeline (222) is used to introduce and export cold fluid into the second inner cavity.

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

7. The light emitting device according to claim 1, characterized in that: The position of the resonance tube (100) where the light-emitting body (300) is arranged is made of transparent material.

8. The light emitting device according to claim 1, characterized in that: The material of the luminous body (300) is an organic myoluminescent material or an inorganic myoluminescent material.

9. An outdoor lighting device, characterized in that: It comprises the light emitting device as claimed in any one of claims 1 to 8.

10. An optical alarm device, characterized in that: It comprises the light emitting device as claimed in any one of claims 1 to 8.

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