Temperature difference generation device, and power generation device using temperature difference generation device

Abstract

To provide a novel and improved device capable of efficiently utilizing energy.SOLUTION: A device includes: at least two radiation sources 110, 120 that are spaced and diffuse infrared radiation; one or more reflecting units 130-133, 140, 142 arranged to reflect infrared radiation from the radiation sources 110, 120. The radiation sources 110, 120 and the reflecting units 130-133, 140, 142 are placed in a vacuum space 150. The infrared radiation diffused by the radiation sources 110, 120 is reflected back and forth by the reflecting units 130-133, 140, 142, thereby changing temperatures of at least two of the radiation sources 110, 120. With this configuration, a temperature difference can be generated between at least two radiation sources, and can be used to realize efficient utilization of energy, e.g., power generation.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a temperature difference generating device and a power generating device using the temperature difference generating device. [Background technology]

[0002] Conventionally, a system for recovering energy derived from motion such as vibration, impact, and wave motion is disclosed in JP 2008-506064 A (Patent Document 1). The energy recovery device disclosed in the document aims to improve energy recovery efficiency, and the device includes a part fixed to a support or liquid and a mobile part in a suspended state. The fixed part has a smaller mass than the mobile part. In particular, the mobile part includes a case for the device.

[0003] According to such an energy recovery device, it is possible to improve the energy recovery efficiency as compared with the background art disclosed in Patent Document 1. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-138601 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the energy recovery efficiency is still low even when the energy recovery device of Patent Document 1 is used. There is a strong demand for a device that is not necessarily an improvement over conventional technology, but is capable of effectively utilizing energy from a completely new perspective.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved device that is capable of making effective use of energy. [Means for solving the problem]

[0007] In order to solve the above problems, according to a first aspect of the present invention, there is provided a temperature difference generating device comprising at least two radiation sources arranged at a distance from each other and diffusing electromagnetic waves, and one or more reflecting sections arranged to reflect the electromagnetic waves from the radiation sources, wherein the radiation sources and the reflecting sections are arranged in a vacuum space, and the electromagnetic waves diffused from the radiation sources are reflected by the reflecting sections and travel back and forth, thereby changing the temperature of the at least two radiation sources.

[0008] According to this configuration, a temperature difference can be generated between at least two radiation sources. This temperature difference can be used to effectively utilize energy. For example, electricity can be generated.

[0009] Various applications of the present invention are possible. For example, the reflecting section may include a forward reflecting section that reflects the electromagnetic wave emitted from one of the radiation sources to another radiation source, and a return reflecting section that returns the electromagnetic wave emitted from the radiation source to the same radiation source. With this configuration, the temperature difference that can be generated in the radiation source can be easily changed by simply changing the configuration of the radiation source and the reflecting section.

[0010] In addition, the following specific configurations may also be adopted. Note that the reference characters in parentheses are merely examples that correspond to the embodiments of the invention described below, and the present invention is not limited thereto.

[0011] The radiation source may include a first radiation source and a second radiation source (110, 120), the outgoing reflection unit may include a first outgoing reflection unit (130, 131) that reflects the electromagnetic wave radiated from the first radiation source to the second radiation source and reflects the electromagnetic wave radiated from the second radiation source to the first radiation source, and the return reflection unit may include a first return reflection unit (132, 133) that returns the electromagnetic wave radiated from the first radiation source to the first radiation source, and a second return reflection unit (140, 142) that returns the electromagnetic wave radiated from the second radiation source to the second radiation source.

[0012] The radiation source may include a first radiation source and a second radiation source (210, 220), the outgoing reflection unit may include a first outgoing reflection unit (230) that reflects the electromagnetic wave radiated from the first radiation source to the second radiation source, and a second outgoing reflection unit (240) that reflects the electromagnetic wave radiated from the second radiation source to the first radiation source, and the return reflection unit may include a first return reflection unit (230) that returns the electromagnetic wave radiated from the first radiation source to the first radiation source, and a second return reflection unit (240) that returns the electromagnetic wave radiated from the second radiation source to the second radiation source.

[0013] The radiation source may include a first radiation source and two second radiation sources (310, 320-1, 320-2), the outgoing reflection unit may include a first outgoing reflection unit (330) that reflects the electromagnetic wave radiated from the first radiation source to the second radiation source, and two second outgoing reflection units (340-1, 340-2) that reflect the electromagnetic waves radiated from the two second radiation sources to the first radiation source, respectively, and the return reflection unit may include a first return reflection unit (330) that returns the electromagnetic wave radiated from the first radiation source to the first radiation source, and two second return reflection units (340-1, 340-2) that return the electromagnetic waves radiated from the two second radiation sources to their respective second radiation sources.

[0014] The radiation source may also include a first radiation source and a second radiation source (410, 420), a first back-reflection unit (430) that returns the electromagnetic wave radiated from the first radiation source to the first radiation source, a second back-reflection unit (440) that returns the electromagnetic wave radiated from the second radiation source to the second radiation source, and a lens (450) arranged between the first back-reflection unit and the second back-reflection unit, so that the electromagnetic wave radiated from the first radiation source is sent to the second radiation source via the lens, and the electromagnetic wave radiated from the second radiation source is sent to the first radiation source via the lens.

[0015] The system may also include four radiation sources (510) arranged at equal intervals in the circumferential direction, and send reflection sections and return reflection sections (534, 532) arranged around each of the radiation sources, with connecting sections (536) connecting adjacent send reflection sections.

[0016] In addition, according to a second aspect of the present invention, there is provided a power generation device comprising the temperature difference generating device according to the first aspect of the present invention and a power generation unit that generates power using the temperature difference between at least two of the radiation sources.

[0017] According to this configuration, it is possible to effectively utilize energy by utilizing the temperature difference obtained by the temperature difference generating device. Effect of the Invention

[0018] According to the present invention, it is possible to provide a temperature difference generating device that enables effective use of energy and a power generation device using the temperature difference generating device. Other effects of the present invention will be described in the description of the embodiment of the invention below. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view showing a configuration of a temperature difference generating device 100 according to a first embodiment. [Diagram 2] FIG. 2 is a diagram showing the coming and going of infrared rays in the temperature difference generating device 100. [Diagram 3]FIG. 2 is a perspective view showing a configuration of a temperature difference generating device 200 according to a second embodiment. [Figure 4] FIG. 2 is a schematic diagram of a temperature difference generating device 200. [Diagram 5] 1A and 1B are diagrams for explaining the operation of the temperature generating device 200, in which (a) shows a state in which an electromagnetic wave is sent, and (b) shows a state in which the electromagnetic wave is returned. [Figure 6] FIG. 11 is a perspective view showing a configuration of a temperature difference generating device 300 according to a third embodiment. [Figure 7] FIG. 3 is a schematic diagram of a temperature difference generating device 300. [Figure 8] FIG. 11 is a schematic diagram of a temperature difference generating device 400 according to a fourth embodiment. [Figure 9] FIG. 13 is a schematic diagram of a temperature difference generating device 500 according to a fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant description will be omitted.

[0021] (First embodiment) A first embodiment of the present invention will be described. First, the overall configuration of a temperature difference generating device according to this embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a perspective view showing the configuration of a temperature difference generating device 100 of this embodiment. Fig. 2 is a schematic diagram for explaining the configuration of the temperature difference generating device 100.

[0022] As shown in Fig. 1, the temperature difference generating device 100 includes a first radiation source 110 and a second radiation source 120, which are two radiation sources that are spaced apart from each other and that diffuse electromagnetic waves, and six reflecting sections, namely, a first reflecting section 130, a second reflecting section 131, a first return reflecting section 132, a second return reflecting section 133, a third return reflecting section 140, and a fourth return reflecting section 142, that are arranged to reflect electromagnetic waves from the first radiation source 110 and the second radiation source 120. A space 150 surrounded by the first reflecting section 130, the second reflecting section 131, the second return reflecting section 133, and the third return reflecting section 140 is vacuum. An island-shaped member to which the first return reflecting section 132 and the fourth return reflecting section 142 are attached, and the first radiation source 110 and the second radiation source 120 are installed therein.

[0023] The electromagnetic waves diffused from the first radiation source 110 and the second radiation source 120 travel back and forth when reflected by the first reflecting section 130 and the second reflecting section 131, and travel back and forth when reflected by the first back-reflecting section 132, the second back-reflecting section 133, the third back-reflecting section 140, and the fourth back-reflecting section 142, thereby changing the temperatures of the first radiation source 110 and the second radiation source 120. Each component will be described below.

[0024] (First Radiation Source 110 and Second Radiation Source 120) The first radiation source 110 and the second radiation source 120 diffuse electromagnetic waves (infrared rays). The first radiation source 110 and the second radiation source 120 are arranged apart in a vacuum space 150 as shown in Fig. 1. The temperature difference generating device 100 is configured in the vacuum space 150 which is sealed and evacuated. The bottom and top surfaces of the vacuum space 150 are configured with parallel flat mirrors, and the side surfaces are configured with a first reflecting section 130, a second reflecting section 131, a second back-reflecting section 133, and a third back-reflecting section 140 which are concave curved mirrors.

[0025] As shown in FIG. 2, the first radiation source 110 and the second radiation source 120 are disposed at the foci of the locus of the ellipse constituting the first reflecting section 130. The first radiation source 110 and the second radiation source 120 have a long cylindrical shape and are installed upright across the bottom surface 152 and the top surface 154 of the vacuum space 150. The first radiation source 110 and the second radiation source 120 can be arbitrarily designed, such as a hollow object with a circumference of 10 cm (diameter of about 3.2 cm) and a length of 10 m, the inside of which is filled with water, or a solid black body. The contact parts of the first radiation source 110 and the second radiation source 120 with other parts are heat-shielded, and the effects of thermal conduction and convection of the first radiation source 110 and the second radiation source 120 are eliminated.

[0026] (First reflecting portion 130 and second reflecting portion 131) The first reflecting portion 130 and the second reflecting portion 131 reflect electromagnetic waves from the first radiation source 110 and the second radiation source 120. As shown in FIG. 2, the first reflecting portion 130 and the second reflecting portion 131 are arranged symmetrically with respect to a line connecting the first radiation source 110 and the second radiation source 120. The first reflecting portion 130 and the second reflecting portion 131 are arc-shaped curved mirrors formed by a part of an ellipse, and have a concave cross section. The first reflecting portion 130 and the second reflecting portion 131 are formed in an area connecting the intersection point c and the intersection point d. The first reflecting portion 130 and the second reflecting portion 131 form part of a wall of a side surface of the vacuum space 150.

[0027] (First return reflector 132) The first back-reflection section 132 returns the electromagnetic waves diffused from the first radiation source 110 to the first radiation source 110. As shown in FIG. 2 , the first back-reflection section 132 is configured in an arc shape of 73 degrees, which is an angle formed by the intersection points c, c of the ellipse constituting the first reflection section 130 and the perfect circle constituting the third back-reflection section 140 and a straight line connecting the first radiation source 110 and the first radiation source 110.

[0028] (Second return reflector 133) The second back-reflector 133 returns the electromagnetic waves diffused from the first radiation source 110 to the first radiation source 110. As shown in Fig. 2, the second back-reflector 133 has an arc shape formed by a part of a perfect circle having a radius of the first radiation source 110 and an intersection point d between a straight line connecting both ends of the first back-reflector 132 and the second radiation source 120 and the first reflection section 130. The second back-reflector 133 is an arc in a range connecting the intersection points d, d. The second back-reflector 133 is configured at an angle of approximately 81 degrees.

[0029] (Third return reflector 140) The third back-reflection section 140 returns the electromagnetic waves diffused from the second radiation source 120 to the second radiation source 120. As shown in FIG. 2, the third back-reflection section 140 is disposed so as to surround the periphery of the second radiation source 120. The third back-reflection section 140 has an arc shape formed by a part of a perfect circle, and is formed in a range connecting intersections c and c. The third back-reflection section 140, together with the first reflection section 130, the second reflection section 131, and the second back-reflection section 133, constitutes a wall section of the vacuum space 150. The third back-reflection section 140 is formed at an angle of approximately 286 degrees.

[0030] (Fourth return reflector 142) 2, the fourth back-reflector 142 is configured with the same curvature as the third back-reflector 140 at a perfect circular position that connects the intersection points e, e of the straight line connecting both ends of the first back-reflector 132 and the second radiation source 120 with the third back-reflector 140. The fourth back-reflector 142 is configured in a range of about 10 degrees.

[0031] As shown in FIG. 2, the first back-reflection portion 132 and the fourth back-reflection portion 142 are end faces of island-shaped members each having both ends connected by a straight line.

[0032] The vacuum space 150 can be made of any material that can reflect electromagnetic waves. The first reflecting section 130, the first back-reflecting section 132, the second back-reflecting section 133, the third back-reflecting section 140, and the fourth back-reflecting section 142 are configured so that their curvatures do not change in the entire vertical direction. The first reflecting section 130, the first back-reflecting section 132, the second back-reflecting section 133, the third back-reflecting section 140, and the fourth back-reflecting section 142 can also be concave mirrors.

[0033] The first reflecting section 130, the second reflecting section 131, the first back-reflecting section 132, the second back-reflecting section 133, the third back-reflecting section 140 and the fourth back-reflecting section 142 cause electromagnetic waves diffused from the first radiation source 110 and the second radiation source 120 to travel back and forth or return between them, thereby generating a temperature difference between the first radiation source 110 and the second radiation source 120. The principle of how the temperature difference is generated will be described further below.

[0034] The above describes the configuration of the temperature difference generating device 100. Hereinafter, the operation of the temperature difference generating device 100 will be described with reference to FIG.

[0035] The first radiation source 110 and the second radiation source 120 radiate electromagnetic waves unless the temperature is absolute zero. The electromagnetic waves diverging from the first radiation source 110 and the second radiation source 120 are reflected by a concave mirror with an elliptical cross section and converged to the other radiation source. The electromagnetic waves travel between the first radiation source 110 and the second radiation source 120 via the first reflecting section 130 and the second reflecting section 131. Since the angle of the first reflecting section 130 as viewed from the second radiation source 120 is 32 degrees and the angle as viewed from the first radiation source 110 is 103 degrees, the temperature of the second radiation source 120 rises and the temperature of the first radiation source 110 falls. Since the temperatures of the first radiation source 110 and the second radiation source 120 change, the amount of heat emitted also changes.

[0036] The change in the amount of heat emitted by first radiation source 110 and second radiation source 120 will be described below with reference to a specific example.

[0037] The first radiation source 110 and the second radiation source 120 are hollow objects with a circumference of 10 cm (diameter approximately 3.2 cm) and a length of 10 m, and are filled with water. In this case, the first radiation source 110 and the second radiation source 120 each have a volume of 8042 cm3 and a specific heat of 4184 J / (kg K), so 33648 J is required to change the temperature by 1 degree.

[0038] The radiation energy L of the electromagnetic waves diffused per unit time by the first radiation source 110 and the second radiation source 120 is expressed as the surface temperature T and the Stefan-Boltzmann constant σ=5.67×10 -8 Then, L = σ × (T 4 ) can be calculated as follows:

[0039] Although the electromagnetic waves from the first radiation source 110 and the second radiation source 120 are diffused in all directions, even when they are reflected by the plane mirrors on the top surface 154 and the bottom surface 152 of the vacuum space 150, the trajectory of the electromagnetic waves is represented by a straight line in FIG.

[0040] If the first radiation source 110 and the second radiation source 120 are not connected to other heat sources such as geothermal energy or the atmosphere, and the temperature of the first radiation source 110 and the second radiation source 120 is 300 K (approximately 27° C.), they emit electromagnetic waves of 459.27 W into the surrounding area.

[0041] The first radiation source 110 is surrounded by a horizontal area of ​​360 degrees by the first reflecting section 130, the second reflecting section 131, the first back-reflecting section 132, and the second back-reflecting section 133. Therefore, the infrared rays emitted by the first radiation source 110 will reach one of the reflecting sections, but the proportion of the infrared rays that reach one of the reflecting sections is determined by the angle that each reflecting section occupies in the 360 ​​degrees.

[0042] The infrared ray emitted by the first radiation source 110 is 459.27 W, so The infrared rays reaching the first reflecting portion 130, which occupies 103 degrees, 459.27×(103 / 360)=131.40225 (1) The infrared rays reaching the first return reflector 132, which occupies 73 degrees, 459.27×(73 / 360)=93.12975···(2) The infrared rays reaching the second return reflector 133, which occupies 81 degrees, 459.27×(81 / 360)=103.33575···(3) The infrared rays reaching the second reflecting part 131, which occupies 103 degrees, 459.27×(103 / 360)=131.40225···(4) become.

[0043] The second radiation source 120 is surrounded by the first reflecting section 130, the second reflecting section 131, the third back-reflecting section 140, and the fourth back-reflecting section 142 in the horizontal direction of 360 degrees. The infrared rays reaching the first reflecting portion 130, which occupies 32 degrees, 459.27×(32 / 360)=40.824···(5) The infrared rays reaching the fourth return reflector 142, which occupies 10 degrees, 459.27×(10 / 360)=12.7575···(6) The infrared rays reaching the third return reflector 140, which occupies an angle of 286 degrees, 459.27×(286 / 360)=364.8645···(7) The infrared rays reaching the second reflecting portion 131, which occupies 32 degrees, 459.27×(32 / 360)=40.824···(8) become.

[0044] The infrared rays that reach the first reflecting portion 130 and the second reflecting portion 131 are transferred to the other radiation source, and the infrared rays that reach the first to fourth back-reflecting portions 132, 133, 140, 142 return to the original radiation source. Thus, the first radiation source 110 emits 459.27 W, which is the sum of (1), (2), (3), and (4), and absorbs 278.1135 W, which is the sum of (2), (3), (5), and (8). Thus, the first radiation source 110 emits 459.27 J and absorbs 278.1135 J per second, resulting in a net loss of 181.1565 J of heat.

[0045] Meanwhile, the second radiation source 120 emits 459.27 W, which is the sum of (5), (6), (7), and (8), and absorbs 640.4265 W, which is the sum of (1), (4), (6), and (7). Thus, the second radiation source 120 emits 459.27 J and absorbs 640.4265 J per second, resulting in a net increase in heat of 181.1565 J. Over approximately 186 seconds, the temperature of the first radiation source 110 drops by 1 degree, and the temperature of the second radiation source 120 rises by 1 degree.

[0046] Here, if the temperature of the first radiation source 110 is 299 K, then 453.18 W of electromagnetic waves are diffused to the surroundings. Of the electromagnetic waves diffused by the first radiation source 110, those that hit the second back-reflector 133 and the first back-reflector 132 are reflected and return to the first radiation source 110. As seen from the first radiation source 110, the second back-reflector 133 and the first back-reflector 132 are 81 degrees and 73 degrees, respectively, so (154 / 360) returns to the first radiation source 110. At this time, the amount of heat returning to the first radiation source 110 is (154 / 360)×453.18=193.86 W.

[0047] Of the electromagnetic waves diffused by the first radiation source 110, those that hit the first reflecting portion 130 and the second reflecting portion 131 are reflected and transferred to the second radiation source 120. As the angle of the first reflecting portion 130 reflected to the second radiation source 120 as viewed from the first radiation source 110 is 103 degrees at two points, (206 / 360) is transferred to the second radiation source 120. At this time, the amount of heat returning to the second radiation source 120 is (206 / 360)×453.18=259.31 W.

[0048] Furthermore, if the temperature of the second radiation source 120 is 301 K, then electromagnetic waves of 465.42 W are diffused to the surroundings.

[0049] Of the electromagnetic waves diffused by the second radiation source 120, those that hit the fourth back-reflector 142 and the third back-reflector 140 are reflected and return to the second radiation source 120. The angles of the fourth back-reflector 142 and the third back-reflector 140 as viewed from the second radiation source 120 are 10 degrees and 286 degrees, respectively, so (296 / 360) returns to the second radiation source 120. (296 / 360)×465.42=382.67W.

[0050] Of the electromagnetic waves diffused by second radiation source 120, the portion that hits first reflecting section 130 is reflected and transferred to first radiation source 110. As seen from second radiation source 120, first reflecting section 130 has two 32 degree angles, so (64 / 360) is transferred to first radiation source 110. (64 / 360)×465.42=82.74W.

[0051] Thus, the first radiation source 110 receives 193.86 W back from the first radiation source 110 and receives 82.74 W from the second radiation source 120. Thus, the first radiation source 110 emits 459.27 W and absorbs 276.60 W, resulting in a loss of 176.58 J of heat per second.

[0052] Meanwhile, the second radiation source 120 receives 259.31 W from the first radiation source 110 and receives 382.67 back from the second radiation source 120. Therefore, the second radiation source 120 emits 465.42 W and absorbs 642.00 W, resulting in an increase in the amount of heat of 176.58 J per second.

[0053] It takes about 191 seconds, and the temperature of the first radiation source 110 drops by 1 degree to 298 K, while the temperature of the second radiation source 120 rises by 1 degree to 302 K. This takes longer for the temperature to change by 1 degree than it did from 300 K. After that, the temperature of the first radiation source 110 continues to drop and the temperature of the second radiation source 120 continues to rise, but the rate of change becomes increasingly slow. An equilibrium state is reached when the temperature of the first radiation source 110 is 256.7 K and the temperature of the second radiation source 120 is 343.3 K, and the temperature change stops.

[0054] When the temperature change stops, 246.20 W is emitted from the first radiation source 110. Of this, (154 / 360) returns to the first radiation source 110, and (206 / 360) is transferred to the second radiation source 120. In addition, 787.55 W is emitted from the second radiation source 120, of which (296 / 360) returns to the second radiation source 120, and (64 / 360) is transferred to the first radiation source 110. At this time, the amount of heat transferred from the first radiation source 110 to the second radiation source 120 and the amount of heat transferred from the second radiation source 120 to the first radiation source 110 are both 140 W, so an equilibrium state is reached.

[0055] The temperature difference generating device 100 is used, for example, to generate electricity using the temperature difference while a temperature difference is generated between the first radiation source 110 and the second radiation source 120.

[0056] (Effects of the First Embodiment) As described above, according to this embodiment, a temperature difference can be generated between the first radiation source 110 and the second radiation source 120. This temperature difference can be used to effectively utilize energy. For example, power can be generated. There are various power generation methods using the temperature difference, such as a Stirling engine and the Seebeck effect, but the methods are not limited thereto.

[0057] In addition, by changing the configuration of the first reflecting section 130, the second reflecting section 131, the first back-reflecting section 132, the second back-reflecting section 133, the third back-reflecting section 140, and the fourth back-reflecting section 142, the temperature difference that can be generated in the radiation source can be changed.

[0058] In addition, the radiation source is composed of two radiation sources, a first radiation source 110 and a second radiation source 120, and the reflecting portion is composed of the second back-reflecting portion and the third back-reflecting portion 140 which are parts of a perfect circle, and the first reflecting portion 130 and the second reflecting portion 131 which are parts of an ellipse, so that the structure can be simplified.

[0059] Second Embodiment The second embodiment will be described with reference to Figs. 3 and 4. Fig. 3 is a perspective view showing the configuration of a temperature difference generating device 200 of the second embodiment. Fig. 4 is a schematic diagram of the temperature difference generating device 200. As shown in Fig. 3, the temperature difference generating device 200 is configured with two reflecting sections, a first reflecting section 230 and a second reflecting section 240, which are arranged so that their concave surfaces face each other. A first radiation source 210 is arranged close to the first reflecting section 230, and a second radiation source 220 is arranged close to the second reflecting section 240. A part of the first reflecting section 230 and the second reflecting section 240 act as a sending reflecting section that reflects the electromagnetic wave emitted from the first radiation source 210 to the second radiation source 220 and reflects the electromagnetic wave emitted from the second radiation source 220 to the first radiation source 210. In addition, other parts of the first reflecting section 230 and the second reflecting section 240 act as return reflecting sections that return the electromagnetic waves emitted from the first radiation source 210 to the first radiation source 210 and return the electromagnetic waves emitted from the second radiation source 220 to the second radiation source 220.

[0060] The first radiation source 210 and the second radiation source 220 are rectangular prisms elongated in the vertical direction, as shown in Figures 3 and 4. The first radiation source 210 and the second radiation source 220 have four side surfaces, of which only one surface close to the reflecting part is made of a black body, and the remaining three surfaces have low emissivity and are insulated from the internal temperature.

[0061] The first reflecting portion 230 and the second reflecting portion 240 are arc-shaped and are formed by parts of parabolas with different curvatures. The first reflecting portion 230 has a larger curvature than the second reflecting portion 240. The first reflecting portion 230 is narrower than the second reflecting portion 240, and linear portions 232 are formed on both ends of the first reflecting portion 230, each of which extends linearly to face the second reflecting portion 240.

[0062] The ends of the two straight line portions 232 and both ends of the second reflecting portion 240 are connected by straight line wall portions 252. A vacuum space 250 is formed by the first reflecting portion 230, the second reflecting portion 240, the two wall portions 252, and the top and bottom surfaces 254 similar to those in the first embodiment. The straight line portions 232 act as return reflecting portions.

[0063] The first reflecting portion 230 is divided into a first central return-reflecting portion 230a located at the center in the width direction, and first side return-reflecting portions 230b, 230c adjacent to both sides of the first central return-reflecting portion 230a. The second reflecting portion 240 is divided into a second central return-reflecting portion 240a located at the center in the width direction, second side return-reflecting portions 240b, 240c adjacent to both sides of the second central return-reflecting portion 240a, and second end return-reflecting portions 240d, 240e extending from the second side return-reflecting portions 240b, 240c to the wall portion 252.

[0064] The width of the first central back-reflecting portion 230a and the second central back-reflecting portion 240a is the same as that of the first and second radiation sources 210 and 220. The first side feed reflecting portion 230b and the first side feed reflecting portion 230c, the second side feed reflecting portion 240b and the second end feed reflecting portion 240d are the same width. In addition, the second end back-reflecting portion 240d and the second end back-reflecting portion 240e are the same width.

[0065] The above describes the configuration of temperature difference generating device 200. Below, the operation of temperature difference generating device 200 will be described with reference to Fig. 5. Fig. 5 is a diagram for explaining the operation of temperature generating device 200, where (a) is a diagram showing a state in which electromagnetic waves are sent, and (b) is a diagram showing a state in which the electromagnetic waves return.

[0066] As shown in Fig. 5(a), the electromagnetic waves emitted from the first radiation source 210 are reflected by the first side return reflectors 230b, 230c, which become parallel rays once and are reflected by the second side return reflectors 240b, 240c to be sent to the second radiation source 220. Of the electromagnetic waves emitted from the first radiation source 210, the portion reflected by the first central return reflector 230a returns to the first radiation source 210, as shown in Fig. 5(b).

[0067] As shown in Fig. 5(a), the electromagnetic wave radiated from the second radiation source 220 is reflected by the second side return reflector 240b, once becomes parallel light, is reflected by the first side return reflector 230b, 230c, and is sent to the first radiation source 210. As shown in Fig. 5(b), the electromagnetic wave radiated from the second radiation source 220 is reflected by the second end return reflector 240d, 240e, once becomes parallel light, is reflected by the straight line portion 232, and is again reflected by the second end return reflector 240d, and returns to the second radiation source 220. Of the electromagnetic wave radiated from the second radiation source 220, the part reflected by the second central return reflector 240a returns to the second radiation source 220.

[0068] The routes along which electromagnetic waves travel between the first radiation source 210 and the second radiation source 220 include a route via the first side feed reflector 230b and the second side feed reflector 240b, and a route via the first side feed reflector 230c and the second side feed reflector 240c. That is, the first side feed reflector 230b and the second side feed reflector 240b correspond to the first reflector 130 in the first embodiment, and the first side feed reflector 230c and the second side feed reflector 240c correspond to the second reflector 131 in the first embodiment.

[0069] (Third embodiment) The third embodiment will be described with reference to Fig. 6 and Fig. 7. Fig. 6 is a perspective view showing the configuration of a temperature difference generating device 300 of the third embodiment. Fig. 7 is a schematic diagram of the temperature difference generating device 300. As shown in Figs. 6 and 7, the temperature difference generating device 300 is configured with three reflecting parts, a first reflecting part 330 and two second reflecting parts 340-1 and 340-2, which are arranged so that their concave surfaces face each other.

[0070] 6 and 7, a portion of the first reflecting portion 330 facing the first radiation source 310 acts as a return reflecting portion that returns the electromagnetic wave radiated from the first radiation source 310 to the first radiation source 310. In addition, portions of the second reflecting portions 340-1 and 340-2 facing the second radiation source 330 act as return reflecting portions that return the electromagnetic wave radiated from the second radiation source 320 to the second radiation source 320.

[0071] 6 and 7, the other parts of the first reflecting portion 330 and the second reflecting portions 340-1, 340-2 act as send reflecting portions that reflect the electromagnetic waves radiated from the first radiation source 310 to the second radiation sources 320-1, 320-2 and reflect the electromagnetic waves radiated from the second radiation sources 320-1, 320-2 to the first radiation source 310. Since the two second reflecting portions 340-1, 340-2 have the same shape, they will be described as second reflecting portion 340 when there is no need to distinguish between them.

[0072] In this manner, the first radiation source 310 and the second radiation sources 320-1 and 320-2 may have the same configuration as the first radiation source 210 and the second radiation source 220 of the second embodiment, and therefore a detailed description thereof will be omitted here.

[0073] 6 and 7, the first reflecting portion 330 and the second reflecting portion 340 are arc-shaped and are formed by parts of parabolas with different curvatures. The first reflecting portion 330 has a smaller curvature than the second reflecting portion 340. The first reflecting portion 330 has a width equal to the width of the two second reflecting portions 340-1 and 340-2 arranged side by side, and constitutes one wall portion of the vacuum space 350. The two second reflecting portions 340-1 and 340-2 are arranged side by side so as to face the first reflecting portion 330, and constitute a wall portion facing the first reflecting portion 330.

[0074] The first reflecting portion 330 and the ends of the two second reflecting portions 340-1, 340-2 are connected by a linear wall portion 352. A vacuum space 350 is formed by the first reflecting portion 330, the two second reflecting portions 340-1, 340-2, the two walls 352, and the top and bottom surfaces 354 similar to those in the first embodiment.

[0075] One first radiation source 310 is arranged so as to face the concave surface of the first reflecting portion 330. Two second radiation sources 320-1, 320-2 are arranged so as to face the concave surfaces of the two second reflecting portions 340-1, 340-2, respectively. The first reflecting portion 330 reflects the electromagnetic wave from the first radiation source 110, and the two second reflecting portions 340-1, 340-2 reflect the electromagnetic wave from the second radiation sources 320-1, 320-2. At this time, the electromagnetic wave travels between the upper or lower half of the first reflecting portion 330 and one of the two second reflecting portions 340-1, 340-2.

[0076] Because the angles are different, 90 degrees for the first reflecting section 330 and 180 degrees for the second reflecting section 340, at the same temperature, twice as much electromagnetic waves will come out from the second reflecting section 340 side as those coming out from the first reflecting section 330, causing the temperature of the first radiation source 310 to rise and the temperature of the second radiation source 320 to fall.

[0077] (Fourth embodiment) The fourth embodiment will be described with reference to FIG. 8. FIG. 8 is a schematic diagram of a temperature difference generating device 400 of the fourth embodiment. As shown in FIG. 8, the temperature difference generating device 400 has a wall portion configured in an external shape in which two circles of large and small diameters overlap, and a lens 460 is provided in the overlapping portion. The first radiation source 410 is surrounded by a first back-reflection section 430 configured as a part of a large diameter circle, and the lens 460. The first back-reflection section 430 surrounds a range of 325 degrees out of the 360 ​​degrees around the first radiation source 410, and the lens 460 surrounds the remaining range of 35 degrees.

[0078] The second radiation source 420 is surrounded by a second back-reflecting section 440 formed of a part of a circle with a small diameter, and a lens 460. The second back-reflecting section 440 surrounds a range of 260 degrees out of a total of 360 degrees around the second radiation source 420, and the lens 460 surrounds the remaining range of 100 degrees.

[0079] The first back-reflecting section 430 returns the electromagnetic wave from the first radiation source 410, and the second back-reflecting section 440 returns the electromagnetic wave from the second radiation source 420. Through the lens 460, the electromagnetic waves from the first radiation source 410 and the second radiation source 420 travel back and forth.

[0080] A vacuum space 450 is formed by the first back-reflection section 430, the second back-reflection section 440, and the same top and bottom surfaces 452 as in the first embodiment. The other configurations are the same as in the first embodiment.

[0081] Fifth embodiment The fifth embodiment will be described with reference to FIG. 9. FIG. 9 is a schematic diagram of a temperature difference generating device 500 according to the fifth embodiment. As shown in FIG. 9, the temperature difference generating device 500 includes: In this configuration, four temperature difference generating devices 100 of the first embodiment are arranged at 90 degree intervals so that the positions of the second radiation sources 120 overlap. That is, the first reflecting section 530, the second reflecting section 531, the first back-reflecting section 532, the second back-reflecting section 533, and the fourth back-reflecting section 542 of this embodiment correspond to the first reflecting section 130, the second reflecting section 131, the first back-reflecting section 132, the second back-reflecting section 133, and the fourth back-reflecting section 142 of the first embodiment, and are similarly configured at four locations at 90 degree intervals. In addition, the third back-reflecting section 540 of this embodiment corresponds to a part of the arc of the third back-reflecting section 140 of the first embodiment, and has the same action.

[0082] A vacuum space 550 is formed by the four first reflecting sections 530, the second reflecting section 531, the first back-reflecting section 532, the third back-reflecting section 540, and the top and bottom surfaces 552 similar to those of the first embodiment. The first radiation sources 510 are disposed between each of the four first reflecting sections 530 and the second reflecting section 531, while the second radiation source 520 is disposed at the center. The other configurations are the same as those of the first embodiment. According to this embodiment, the number of radiation sources can be increased, and therefore the amount of power generation can be increased.

[0083] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an example. It is clear that a person skilled in the art can think of various modified or altered examples within the scope of the claims, and it is understood that such examples also naturally belong to the technical scope of the present invention.

[0084] The above-described embodiments, applications, modifications, and the like can be implemented in appropriate combinations. [Explanation of symbols]

[0085] 100~500 Temperature difference generator 110, 210, 310, 410, 510 1st radiation source 120, 220, 320, 420, 520 Second radiation source 130, 230, 330, 430, 530 1st reflection section 131, 240, 340-1, 340-2, 440, 531 2nd reflection section 132, 532 First return reflector 133, 533 Second return reflector 140, 540 3rd return reflector 142, 542 4th return reflector 150, 250, 350, 450, 550 vacuum space 152, 254, 354, 452, 552 Bottom 154 Top surface 230a First central return reflector 230b, 230c First side feed reflector 232 Straight section 240a Second central return reflector 240b, 240c Second side feed reflector 240d, 240e Second end return reflector 252, 352 wall

Claims

1. At least two radiation sources disposed at a distance from each other and configured to spread electromagnetic waves; one or more reflectors arranged to reflect electromagnetic waves from the radiation source; Equipped with the radiation source and the reflector are disposed in a vacuum space; A temperature difference generating device, characterized in that electromagnetic waves diffused from the radiation source are reflected by the reflecting portion and travel back and forth, thereby changing temperatures of at least two of the radiation sources.

2. The reflecting portion is A sending and reflecting section that reflects the electromagnetic wave radiated from one of the radiation sources to another radiation source; a return reflector that returns the electromagnetic wave emitted from the radiation source to the same radiation source; The temperature difference generating device according to claim 1 , comprising:

3. the radiation source includes a first radiation source and a second radiation source; The feed reflector is a first reflecting section that reflects the electromagnetic wave radiated from the first radiation source to the second radiation source and reflects the electromagnetic wave radiated from the second radiation source to the first radiation source; The return reflection portion is a first return reflector that returns the electromagnetic wave radiated from the first radiation source to the first radiation source; a second return reflector that returns the electromagnetic wave radiated from the second radiation source to the second radiation source; The temperature difference generating device according to claim 2 , further comprising:

4. the radiation source includes a first radiation source and a second radiation source; The feed reflector is a first reflecting section that reflects the electromagnetic wave radiated from the first radiation source to the second radiation source; a second reflecting section that reflects the electromagnetic wave radiated from the second radiation source to the first radiation source; Including, The return reflection portion is a first return reflector that returns the electromagnetic wave radiated from the first radiation source to the first radiation source; a second return reflector that returns the electromagnetic wave radiated from the second radiation source to the second radiation source; The temperature difference generating device according to claim 2 , further comprising:

5. the radiation source includes a first radiation source and two second radiation sources; The feed reflector is a first reflecting section that reflects the electromagnetic wave radiated from the first radiation source to the second radiation source; two second sending reflection units that respectively reflect the electromagnetic waves radiated from the two second radiation sources to the first radiation source; Including, The return reflection portion is a first return reflector that returns the electromagnetic wave radiated from the first radiation source to the first radiation source; Two second return reflectors that return the electromagnetic waves emitted from the two second radiation sources to the respective second radiation sources; The temperature difference generating device according to claim 2 , further comprising:

6. the radiation source includes a first radiation source and a second radiation source; a first return reflector that returns the electromagnetic wave radiated from the first radiation source to the first radiation source; a second return reflector that returns the electromagnetic wave radiated from the second radiation source to the second radiation source; A lens disposed between the first back-reflection unit and the second back-reflection unit; Including, Sending electromagnetic waves emitted from the first radiation source to the second radiation source through the lens; 2. The temperature difference generating device according to claim 1, wherein the electromagnetic waves emitted from the second radiation source are transmitted to the first radiation source via the lens.

7. Four of said radiation sources are arranged at equal intervals in a circumferential direction; a forward reflector and a return reflector disposed around each of said radiation sources; Including, 3. The temperature difference generating device according to claim 2, further comprising a connecting portion for connecting the adjacent feed reflecting portions to each other.

8. A power generating device comprising: the temperature difference generating device according to any one of claims 1 to 7; and a power generating section that generates power using the temperature difference between at least two of the radiation sources.

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