JP2017015313A - Thermal acoustic cooling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a melting amount of snow stored in a snow chamber.SOLUTION: This invention utilizes a thermal acoustic cooling machine 1 in which there are provided a first stuck 3A held by a first high temperature side heat exchanger 4 and a first low temperature side heat exchanger 5 and a second stuck 3B held by a second high temperature side heat exchanger 6 and a second low temperature side heat exchanger 7 installed inside a loop pipe 2, a standing wave and a progressive wave caused by self excitation under heating of the first high temperature side heat exchanger 4 are generated and the second low temperature side heat exchanger 7 is cooled. The first high temperature side heat exchanger 4 is heated by solar heat and a snow chamber 31 is cooled by the second low temperature side heat exchanger 7, so that when the first high temperature side heat exchanger 4 is heated by the solar heat, the snow chamber 31 is cooled by the second low temperature side heat exchanger 7. In this case, the higher the solar heat for heating the first high temperature heat exchanger 4, the higher the cooling power, the cooling power is also increased as the sun shines strong and a melting amount of snow is high and this is suitable for utilization at the snow chamber 31.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a thermoacoustic cooling device for cooling a snow chamber.

  In recent years, there has been an increasing interest in using energy that has not been used so far. For example, in heavy snow areas, winter snow is stored and used for cooling in summer (for example, Patent Document 1). There is also an increasing demand for low-temperature storage of vegetables, rice and liquor using winter snow.

  And the subject in the case of using for cooling is that introduction cost is expensive. The construction cost of the snow room occupies half, and the other half is the air duct and the blower. Also, in order to use the snow stored at the end of March as a cooling / heating source from the end of July to the beginning of September, it is necessary to store a large amount in anticipation of the amount of snow that can be melted.

  By the way, as a thermoacoustic apparatus that can cool an object using a thermoacoustic effect, a first stack sandwiched between a first high temperature side heat exchanger and a first low temperature side heat exchanger, And a second stack sandwiched between the second high temperature side heat exchanger and the second low temperature side heat exchanger, and the self-excited standing wave by heating the first high temperature side heat exchanger And a traveling wave is generated, and the second low temperature side heat exchanger is cooled by the standing wave and the traveling wave, and / or the standing wave and the traveling wave are cooled by cooling the first low temperature side heat exchanger. There is known a thermoacoustic apparatus (for example, Patent Document 2) in which the second high temperature side heat exchanger is heated by the standing wave and the traveling wave, but is not widely used in general.

JP 2006-64321 A JP-A-2005-274101

  The problem to be solved is to provide a thermoacoustic cooling device for a snow room that can reduce the amount of snow stored in the snow room.

  The invention of claim 1 includes a first stack sandwiched between a first high temperature side heat exchanger and a first low temperature side heat exchanger, a second high temperature side heat exchanger, and a second low temperature side inside the loop pipe. A second stack sandwiched between the heat exchangers, and by generating the standing wave and traveling wave by self-excitation by heating the first high-temperature side heat exchanger, the standing wave and traveling wave Using a thermoacoustic cooler in which the second low temperature side heat exchanger is cooled by waves, heating the first high temperature side heat exchanger by solar heat, and cooling the snow chamber by the second low temperature side heat exchanger It is characterized by.

  The invention of claim 2 is characterized by comprising heat collecting means for collecting the solar heat and heat transport means for transporting the heat collected by the heat collecting means to the first high temperature side heat exchanger.

  The invention of claim 3 is characterized in that the heat collecting means evaporates a heating medium by the solar heat and transports the evaporated heating medium to the first high temperature side heat exchanger by the heat transporting means.

  The invention of claim 4 is characterized in that the first high temperature side heat exchanger is provided with a plurality of passages through which the evaporated heating medium passes inside the loop pipe.

  According to the configuration of the first aspect, when the first high temperature side heat exchanger is heated by solar heat, the snow chamber is cooled by the second low temperature side heat exchanger. In this case, the greater the solar heat that heats the first high-temperature side heat exchanger, the higher the cooling capacity. Therefore, the higher the sunlight and the greater the amount of snow that can be melted, the higher the cooling capacity, which is suitable for use in a snow room. Since the amount of snow that can be melted can be reduced in this way, the amount of stored snow can be reduced, and the size of the snow compartment can be reduced, so that the introduction cost can be reduced by reducing the construction cost.

  According to the configuration of the second aspect, solar heat can be collected by the heat collecting means, and the heat collected by the heat collecting means can be transported by the heat transport means to heat the first high temperature side heat exchanger.

  According to the configuration of the third aspect, the first high temperature side heat exchanger can be heated by the evaporated heating medium.

  According to the structure of Claim 4, heat exchange is efficiently performed when a heating medium passes through a some channel | path, and a 1st high temperature side heat exchanger can be heated effectively.

It is a schematic explanatory drawing of the thermoacoustic cooler which shows Example 1 of this invention. It is a schematic explanatory drawing of a thermoacoustic cooling device same as the above. It is a perspective view of the principal part of a heat exchanger same as the above. It is a perspective view of the principal part of another heat exchanger same as the above. It is explanatory drawing explaining a thermoacoustic effect same as the above.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  Hereinafter, Example 1 of the present invention will be described with reference to FIGS. The thermoacoustic cooling device includes a thermoacoustic cooler 1, and the thermoacoustic cooler 1 includes a first high temperature side heat exchanger 4 and a first low temperature inside a loop pipe 2 configured in a substantially rectangular shape as a whole. The first stack 3A sandwiched between the side heat exchangers 5 and the second stack 3B sandwiched between the second high temperature side heat exchanger 6 and the second low temperature side heat exchanger 7 are provided. The first high temperature side heat exchanger 4 on the first stack 3A side is heated to generate a self-excited standing wave and traveling wave, and the standing wave and traveling wave are propagated to the second stack 3B side. Thus, the second low temperature side heat exchanger 7 provided on the second stack 3B side is cooled.

  The loop tube 2 includes a pair of left and right straight tube portions 2A and 2A that are provided perpendicular to the ground, and upper and lower straight tube portions 2B that connect the upper and lower portions of the straight tube portions 2A and 2A. It consists of metal pipes. The material of the loop tube 2 is not limited to metal, but can be made of transparent glass, resin, or the like. When the loop tube 2 is made of material such as transparent glass or resin, The position of the stack 3A and the second stack 3B can be confirmed and the situation inside the tube can be easily observed. A working fluid such as helium having a high sound speed, a small Prandtl number, and a small specific gravity is sealed in the loop tube 2 at a predetermined pressure, and helium is sealed at, for example, 10 atm.

  In the loop pipe 2, the first stack 3 </ b> A sandwiched between the first high temperature side heat exchanger 4 and the first low temperature side heat exchanger 5, the second high temperature side heat exchanger 6, and the second A second stack 3B sandwiched between the low temperature side heat exchanger 7 is provided. The first stack 3A is disposed in the upper straight tube portion 2B, and the second stack 3B is disposed in the lower straight tube portion 2B.

  The first stack 3A and the second stack 3B are formed in a cylindrical shape so as to be in contact with the inner wall of the loop tube 2, and are made of a material having a large heat capacity such as ceramics, sintered metal, wire mesh, metal nonwoven fabric, etc. The tube 2 is configured to have a hole penetrating in the axial direction.

  The 2nd low temperature side heat exchanger 7 is comprised with a thin metal, and is provided with the through-hole for making a standing wave and a traveling wave conduct | electrically_connect inside it. Specifically, as shown in FIG. 3, the second low temperature side heat exchanger 7 is made of metal having excellent thermal conductivity, and includes a cylinder 11 and a plurality of cylinders 11 provided in the cylinder 11. These fin portions 12 are formed in parallel with the diameter of the cylinder 11, the fin portions 12, 12 are parallel to each other, and a gap 13 is formed as a through hole between adjacent fin portions 12. Is provided. A gap 13 is also provided between the inner peripheral surface of the cylinder 11 and the fin portion 12. Further, a gap 13A that is a through hole is formed in the diameter direction orthogonal to the length direction of the fin portion 12, and the fin portion 12 is divided into two. Since the gap 13A is provided to facilitate processing, the fin portion 12 may be processed so as not to provide the gap 13A to form the continuous fin portion 12.

  The 1st high temperature side heat exchanger 4, the 1st low temperature side heat exchanger 5 and the 2nd high temperature side heat exchanger 6 are comprised with a thin metal, and the through-hole for making a standing wave and a traveling wave conduct | electrically_connect inside it Is provided. Specifically, as shown in FIG. 4, the first high temperature side heat exchanger 4, the first low temperature side heat exchanger 5 and the second high temperature side heat exchanger 6 are made of metal having excellent heat conductivity. The cylindrical body 11 and a plurality of fin portions 12 provided inside the cylindrical body 11 are integrally provided, and these fin portions 12 are formed in parallel with the diameter of the cylindrical body 11, and the adjacent fin portions 12 A gap 13 serving as a through hole is provided therebetween. Further, preferably, a plurality of linear through holes 14 through which the heat medium passes are formed in all the fin portions 12, 12..., And both ends of the through holes 14 are opened on the outer peripheral surface of the cylindrical body 11, One end of the through hole 14 constitutes a heat medium inlet 14A, and the other end of the through hole 14 constitutes a heat medium outlet 14B. A plurality of through holes 14 are provided at intervals in the length direction of the cylindrical body 11 at each fin portion 12, 12. The through hole 14 is a passage.

  The first high temperature side heat exchanger 4 is heated by solar heat. On the other hand, the temperature is set to be relatively lower than that of the first high temperature side heat exchanger 4 by circulating water through the first low temperature side heat exchanger 5. Specifically, water as a cooling medium is circulated through the through hole 14. Further, water is also circulated through the second high temperature side heat exchanger 6.

  The thermoacoustic cooling device includes a heat collecting means 21 and a heat transporting means 22 in order to heat the first high temperature side heat exchanger 4 by solar heat. The heat collecting means 21 accommodates the heat collecting portion of a heat pipe, which has a heat collecting portion and a heat radiating portion for collecting the heat of the sun inside, and enclosing a working fluid, in a vacuum tube formed of a transparent body, and Water that is a heating medium is heated in the heat radiating section to generate heated steam.

  The heat transporting means 22 connects the discharge port 23 of the heat collecting means 21 and the first high temperature side heat exchanger 4 via the heating pipe 24, and the first high temperature side heat exchanger 4 and the return port of the heat collecting means. 25 is connected by a return line 26.

  The heat collecting means 21 is provided on one side in the front-rear direction below the first high-temperature side heat exchanger 4, the discharge port 23 is located above the return port 25, and the discharge port in the front-rear direction The heat collecting means 21 is arranged so that 23 is closer to the first high temperature side heat exchanger 4 than the return port 25. Further, the heating pipe line 24 is inclined in the same manner as the line connecting the discharge port 23 and the return port 25, and the inclined pipe portion 24A connected to the discharge port 23, the inclined pipe portion 24A and the first pipe A horizontal side tube portion 24B connecting the inlet 14A of the high temperature side heat exchanger 4 is provided. In the first high temperature side heat exchanger 4, the through hole 14 is disposed obliquely so that the height position of the outlet 14B is lower than the height position of the inlet 14A.

  The return pipe 26 includes a vertical pipe portion 26A provided on the other side in the front-rear direction below the first high temperature side heat exchanger 4, a lower end of the vertical pipe portion 26A, and the return port 25. And a lower pipe portion 26B in the horizontal direction. An inclined pipe part 26C connected to the outlet 14B of the first high temperature side heat exchanger 4 is provided on the upper part of the vertical pipe part 26A. Further, as shown in FIG. 2, between the end of the horizontal tube portion 24B and the plurality of inflow ports 14A, an upstream for guiding the heating medium (steam) flowing out from the horizontal tube portion 24B to the plurality of inflow ports 14A. A guide portion 27 is provided, and the upstream guide portion 27 prevents the heating medium in the horizontal tube portion 24B from flowing directly to the inclined tube portion 26C. Further, as shown in FIG. 2, a heating guide portion 28 is provided between the plurality of outlets 14B and the inclined pipe portion 26C to guide the heating medium flowing out from the outlet 14B to the inclined pipe portion 26C. .

  The snow chamber 31 is a man-made or natural structure having an internal space 32 for storing ice or snow in winter or for storing ice or snow produced by an artificial snow making machine or ice making machine. . In this example, insertion portions 33A, 33A for inserting the pair of straight tube portions 2A, 2A are provided on the upper surface 33 of the snow chamber 31, and the lower straight tube portion 2B is disposed in the snow chamber 31, and the second high temperature side. The heat exchanger 6, the second low temperature side heat exchanger 7, and the second stack 3 </ b> B are located in the snow chamber 31. The lower pipe portion 26B is fixed on the upper surface 33 which is the roof of the snow chamber 31.

  Then, the first high temperature side heat exchanger 4 is heated by solar heat, and the first low temperature side heat exchanger 5 is supplied with heat at a temperature lower than that by circulating water, so that a temperature difference occurs at both ends of the first stack 3A. , Sound waves are generated from the inside of the first stack 3A toward the loop tube 2 on the first high temperature side heat exchanger 4 side. When the sound wave is applied to the second high temperature side heat exchanger 6 on the lower second stack 3B side through the loop tube 2, a temperature difference occurs between both ends of the second stack 3B, and the second low temperature side heat exchanger 7 Cold heat is generated. Since sound waves are also generated from the second low temperature side heat exchanger 7 on the first stack 3A side, the sound waves are applied to the first low temperature side heat exchanger 5 on the first stack 3A side through the loop tube 2. I have to.

  The principle of sound wave generation will be described with reference to FIG. This figure is an explanatory view enlarging one porous hole of the first stack 3A. The gas on the left side in the hole is (1) heated by solar heat and expanded to increase pressure, and (2) pressure Move to the lower right side. (3) The gas moved to the right side is cooled by the circulating water and contracted to decrease the pressure. (4) Since the pressure falls below the pressure of the outer gas, it is pushed back and moved to the left side. When the temperature difference between the first high temperature side heat exchanger 4 and the first low temperature side heat exchanger 5 is increased to some extent, the above phenomena (1) to (4) occur continuously. Sound waves are generated from the stack 3A toward the first high temperature side heat exchanger 4 side. On the contrary, when the sound wave is applied to the second high temperature side heat exchanger 6 side of the second stack 3B, the gas in the hole is forcibly contracted and expanded, and a temperature difference is generated between both ends of the second stack 3B. .

  The heat collecting means 21 collects solar heat, the water inside the heat collecting means 21 is heated to become steam, and this steam flows through the heating line 24 of the heat transport means 22 and flows through the first high temperature side heat exchanger 4. Heat rises to the inlet 14A and passes through the through hole 14, and the first high temperature side heat exchanger 4 is heated. The vapor whose temperature has decreased through the through-hole 14 is liquefied and flows down to the return pipe 26, and thus the water as the heating medium is a closed pipe comprising the heat collecting means 21, the heating pipe 24 and the return pipe 26. Circulate. In this embodiment, the heating medium is water, and the evaporated heating medium is steam. In this case, since the through hole 14 is provided obliquely so that the height position of the outlet 14B is lower than the height position of the inlet 14A, the vapor entering from the inlet 14A is liquefied in the through hole 14. Even if it becomes water, the water falls from the outlet 14B to the return conduit 26 by an oblique inclination.

  As shown in FIG. 4, a through hole 14 through which steam and water pass is penetrated in the fin portion 12. By efficiently heating the first high temperature side heat exchanger 4 with the steam passing through the through hole 14, the entire end face of the first stack 3A connected to the first high temperature side heat exchanger 4 is uniformly heated. It is possible to generate a large sound wave or a large temperature difference from the first stack 3A. Further, also in the first low temperature side heat exchanger 5 and the second high temperature side heat exchanger 6, the circulating water passes through the through-holes 14 so that heat exchange is efficiently performed. For circulating the circulating water, a pumping means (not shown) such as a pump can be used.

  As described above, the first high temperature side heat exchanger 4 is heated to generate a self-excited standing wave and traveling wave, and the second low temperature side heat exchanger 7 is cooled by the standing wave and traveling wave. be able to. Thus, by storing the snow chamber 31 with the thermoacoustic cooler 1 using solar heat, the storage amount of snow or the like can be reduced. If the second high temperature side heat exchanger 6 is arranged in the snow chamber 31 and is cooled by snow in the snow chamber 31, the second high temperature side heat exchanger 6 performs cooling with circulating water. There is no need.

  Thus, in the embodiment, corresponding to claim 1, the first stack 3A sandwiched between the first high temperature side heat exchanger 4 and the first low temperature side heat exchanger 5 inside the loop pipe 2, A second stack 3B sandwiched between the second high temperature side heat exchanger 6 and the second low temperature side heat exchanger 7 is provided, and the first high temperature side heat exchanger 4 is heated to determine by self-excitation. Using the thermoacoustic cooler 1 that generates standing waves and traveling waves and cools the second low-temperature side heat exchanger 7 by the standing waves and traveling waves, the first high-temperature side heat exchanger 4 is heated by solar heat. Since the snow chamber 31 is cooled by the second low temperature side heat exchanger 7, when the first high temperature side heat exchanger 4 is heated by solar heat, the snow chamber 31 is cooled by the second low temperature side heat exchanger 7. In this case, the greater the solar heat that heats the first high-temperature side heat exchanger 4, the higher the cooling capacity. Therefore, the higher the sunlight and the greater the amount of snow that can be melted, the higher the cooling capacity. Suitable. Since the amount of snow that can be melted can be reduced in this way, the amount of stored snow can be reduced, and the snow chamber 31 can be made smaller, so that the introduction cost can be reduced by reducing the construction cost.

  In this way, in the embodiment, corresponding to claim 2, the heat collecting means 21 for collecting solar heat and the heat for transporting the heat collected by the heat collecting means 21 to the first high temperature side heat exchanger 4 Since the transportation means 22 is provided, solar heat can be collected by the heat collection means 21, and the heat collected by the heat collection means 21 can be transported by the heat transportation means 22 to heat the first high temperature side heat exchanger 4.

  Thus, in this embodiment, corresponding to claim 3, the heat collecting means 21 evaporates water as a heating medium by solar heat, and the evaporated heating medium is converted into the first high temperature side heat exchanger by the heat transport means 22. Therefore, the first high temperature side heat exchanger 4 can be heated by the evaporated heating medium.

  In this way, in the embodiment, corresponding to claim 4, the first high temperature side heat exchanger 4 is provided with through holes 14 as a plurality of passages through which the evaporated heating medium passes inside the loop pipe 2. Therefore, heat exchange is performed when steam as a heating medium passes through the plurality of through holes 14, and the first high temperature side heat exchanger 4 can be effectively heated.

  Further, as an effect of the embodiment, the heat collecting means 21 is arranged below the first high temperature side heat exchanger 4, the water as the heating medium is evaporated by the heat collecting means 21, and the generated steam passes through the heating pipe 24. After rising to the first high temperature side heat exchanger 4 and exchanging heat, it becomes water and flows down to the return pipe 26, so that the heating medium can be circulated without using a pump or the like.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible. For example, you may use the cylinder which has the through-hole 14 shown in FIG. 4 for a 1st low temperature side heat exchanger and a 2nd high temperature side heat exchanger. Various heat collecting means can be used, and a liquid heating medium may be passed through the through hole 14. In this case, a pressure feeding means such as a pump can be used. Moreover, the number of the fin parts 12 is not limited to an Example, For example, 20 or more may be sufficient. Further, the heating medium may be a liquid other than water. Needless to say, the snow room can be applied to either a new construction or an existing construction.

DESCRIPTION OF SYMBOLS 1 Thermoacoustic cooler 2 Loop pipe 3A 1st stack 3B 2nd stack 4 1st high temperature side heat exchanger 5 1st low temperature side heat exchanger 6 2nd high temperature side heat exchanger 7 2nd low temperature side heat exchanger
14 Through hole (passage)
21 Heat collection means
22 Heat transport means
31 Snow room

Claims (4)

Inside the loop tube, the first stack sandwiched between the first high temperature side heat exchanger and the first low temperature side heat exchanger, and the second high temperature side heat exchanger and the second low temperature side heat exchanger. A standing wave and a traveling wave generated by self-excitation by heating the first high-temperature side heat exchanger, and the second low-temperature side by the standing wave and the traveling wave. Using a thermoacoustic cooler where the heat exchanger is cooled,
The thermoacoustic cooling device, wherein the first high temperature side heat exchanger is heated by solar heat, and the snow chamber is cooled by the second low temperature side heat exchanger. The thermoacoustic cooling according to claim 1, further comprising: heat collecting means for collecting the solar heat; and heat transport means for transporting heat collected by the heat collecting means to the first high temperature side heat exchanger. apparatus. 3. The thermoacoustic cooling device according to claim 2, wherein the heat collecting means evaporates a heating medium by the solar heat and transports the evaporated heating medium to the first high temperature side heat exchanger by the heat transporting means. . The thermoacoustic cooling device according to claim 3, wherein the first high temperature side heat exchanger is provided with a plurality of passages through which the evaporated heating medium passes inside the loop pipe.

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