JP4029748B2 - Cooling transfer device for Stirling refrigerator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling heat transfer device for a Stirling refrigerator, and more specifically, Stirling in which cold heat obtained from a cooling portion of a Stirling refrigerator is transferred to a predetermined cooling site by a heat transfer means including a working fluid. The present invention relates to a cold heat transfer device for a refrigerator.
[0002]
[Prior art]
Conventionally, for example, in vending machines, it is common to cool products using a refrigeration cycle. The refrigeration cycle includes an evaporator, a compressor, an expander, and a condenser. In such a refrigeration cycle, a fluorocarbon refrigerant has been used.
[0003]
However, if the fluorocarbon refrigerant is released into the atmosphere, the ozone layer may be destroyed. For this reason, the use of CFC-based refrigerants is in a global trend from the viewpoint of environmental protection.
[0004]
In such a background, in recent years, Stirling refrigerators have attracted attention. A Stirling refrigerator is a self-cooling type refrigerator that does not have an external compressor or condenser. By compressing and expanding the internal working gas using a reciprocating compressor, It generates a hot part. Here, helium gas or the like is used as the working gas, and since no chlorofluorocarbon gas is used, the Stirling refrigerator is friendly to the global environment. It is also well known that Stirling refrigerators are small and have high energy efficiency.
[0005]
[Problems to be solved by the invention]
By the way, the Stirling refrigerator is limited to a portion with a small area of the cold heat part. Therefore, when a Stirling refrigerator is used, it is required to efficiently transfer the cold heat obtained from the cold heat section to a predetermined cooling site that needs to be cooled.
[0006]
In view of the above circumstances, an object of the present invention is to provide a cold heat transfer device for a Stirling refrigerator that can efficiently transfer cold heat obtained from a cold heat portion of the Stirling refrigerator to a predetermined cooling site.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, a cold heat transfer device for a Stirling refrigerator according to claim 1 of the present invention comprises:Placed horizontallyStirling refrigeratorCylindricalIn the cold heat transfer device of a Stirling refrigerator, in which cold heat obtained from the cold heat portion is transferred to a predetermined cooling site by heat transfer means having a working fluid, the heat transfer means is thermally connected to the cold heat portion. A condensing part, an evaporation part disposed in the cooling part, a liquid channel for moving the working fluid condensed in the condensing part to the evaporation part, and a working fluid vaporized in the evaporation part A steam flow path for moving to the condensing unitBeforeCirculating working fluid while changing phaseThe condensing part covers the periphery of the cooling part, and the steam flow path is branched in the middle so that the working fluid can move by the gravity inside the condensing part. While connecting to the top end side and the base end side of the upper part, by branching the liquid channel in the middle and connecting to the front end side and the base end side of the lower part of the condensation unit, The working fluid from the vapor flow path is caused to flow from both the proximal end side, and the working fluid that has become the condensed liquid flows from both the distal end side and the proximal end side of the lower portion of the condensing unit to the liquid flow path. MadeIt is characterized by that.
[0008]
  Moreover, the cold heat transfer device of the Stirling refrigerator of claim 2 of the present invention isIn the cold heat transfer device of a Stirling refrigerator, wherein the cold heat obtained from the cold heat part of the Stirling refrigerator is transferred to a predetermined cooling site by a plurality of heat transfer means provided with a working fluid, the plurality of heat transfer means, A condensing unit thermally connected to the cooling unit, an evaporating unit disposed in the cooling part, a liquid flow path for moving the working fluid condensed in the condensing unit to the evaporating unit, and the evaporation A steam flow path for moving the working fluid vaporized in the section to the condensing section and circulating the working fluid while changing the phase, and the condensing section constituting each heat transfer means is the cooling section In the case where any one of the cooling parts where the respective heat transfer means transfer cold heat does not require cooling, the heat transfer means corresponding to the cooling part. The condensing part of the Characterized in that is spaced apart from the heat unit.
[0009]
  Moreover, the cold heat transfer device of the Stirling refrigerator of claim 3 of the present invention isIn the cold heat transfer device of a Stirling refrigerator, wherein the cold heat obtained from the cold heat part of the Stirling refrigerator is transferred to a predetermined cooling site by a plurality of heat transfer means provided with a working fluid, the plurality of heat transfer means, A condensing unit thermally connected to the cooling unit, an evaporating unit disposed in the cooling part, a liquid flow path for moving the working fluid condensed in the condensing unit to the evaporating unit, and the evaporation A steam flow path for moving the working fluid vaporized in the section to the condensing section and circulating the working fluid while changing the phase, and the condensing section constituting each heat transfer means is the cooling section Are connected in a separable manner, and each condensing part is thermally connected to the cooling part, depending on the necessity of cooling of the cooling part to which each heat transfer means transfers cold, or A for separating Characterized by comprising a Chueta.
[0010]
  Moreover, the cold heat transfer device of the Stirling refrigerator of claim 4 of the present invention isIn any 1 item | term of Claims 1-3, The heat-transfer block was interposed between the said condensation part and the said cooling-heat part, It is characterized by the above-mentioned..
[0011]
  Moreover, the cold heat transfer device of the Stirling refrigerator of claim 5 of the present invention is the above-mentioned5. The fins according to claim 1, wherein a plurality of fins are arranged in parallel in a direction from the front end side to the base end side of the condensing unit, and the working fluid is interposed between the fins. The flow path is formed and the surface of the fin is uneven..
[0012]
  Further, the cold transfer device of the Stirling refrigerator of claim 6 of the present invention is6. The heat transfer device according to claim 1, wherein the heat transfer device includes a plurality of the heat transfer devices, and the condensing unit constituting each heat transfer device is thermally connected in a manner separable from the cold heat device. To.
[0013]
  Further, the cold heat transfer device of the Stirling refrigerator of claim 7 of the present invention is the above claim.2An actuator for thermally connecting or separating the condensing part of each heat transfer means with respect to the cold heat part according to the necessity of cooling of the cooling part where each heat transfer means transfers cold heat. It is characterized by having.
[0014]
Moreover, in the cooling heat transfer device for a Stirling refrigerator according to claim 8 of the present invention, in any one of claims 1 to 7, the condensing unit includes an upper condensing unit and a lower condensing unit that are separable from each other. The vapor channel and the liquid channel are connected to each of the upper condensing unit and the lower condensing unit so that the working fluid can be moved by gravity.
[0015]
According to a ninth aspect of the present invention, there is provided a cooling heat transfer device for a Stirling refrigerator according to the eighth aspect, wherein the first condensing unit has a first wall on the side in contact with the cooling unit, and the first wall. A cold heat transfer means for transferring cold heat obtained from the cold heat portion to the second wall between the second wall and the second wall facing the wall of the lower condenser portion, wherein at least the Stirling refrigerator Is in operation, it has a volume large enough to allow a gap to exist between the third wall on the side in contact with the cooling part and the condensed working fluid.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION Exemplary embodiments of a cooling / transferring device for a Stirling refrigerator according to the present invention will be described below in detail with reference to the accompanying drawings.
[0017]
<Embodiment 1>
FIG. 1 is an explanatory view showing a cold heat transfer device of a Stirling refrigerator according to Embodiment 1 of the present invention, and a part thereof is shown in cross section. FIG. 2 is an explanatory diagram simply showing the cold heat transfer device of the Stirling refrigerator in FIG. 1 and 2, the Stirling refrigerator 1 is applied to a vending machine 2. This Stirling refrigerator 1 is horizontally placed on the lower part 2a of the vending machine 2, and has a low temperature cooling unit 3 and a high temperature high temperature unit 4 generated by operation. Both the cold heat part 3 and the high heat part 4 have a cylindrical shape.
[0018]
The cold transfer device (hereinafter also simply referred to as “cold transfer device”) 10 of the Stirling refrigerator 1 includes a heat pipe 11 that is a heat transfer means. The heat pipe 11 has a working fluid sealed therein, and includes a condensing unit 20, an evaporating unit 30, a liquid channel 40, and a vapor channel 50. Here, as the working fluid, for example, an antifreeze refrigerant that is a gas at normal temperature, such as carbon dioxide, and does not freeze with the cold heat from the cold heat unit 3 of the Stirling refrigerator 1 is used.
[0019]
The condensing unit 20 is thermally connected to the cooling unit 3 of the Stirling refrigerator 1. More specifically, the condensing unit 20 has a cylindrical shape having a diameter larger than that of the cooling unit 3 of the Stirling refrigerator 1, and a working fluid channel (not shown) is formed therein. is there. The condensing unit 20 is thermally connected to the cooling unit 3 with the heat transfer block 61 interposed. In the condensing unit 20, the working fluid is condensed by the cold heat obtained from the cold heat unit 3. The heat transfer block 61 is formed of a material having a high thermal conductivity such as a metal such as copper, and cools heat from the tip surface 3a and the side peripheral surface 3b of the cooling unit 3 to the condensing unit 20. To communicate.
[0020]
The evaporating unit 30 is disposed at a predetermined cooling site in the vending machine 2, for example, a lower part of a storage for storing products. More specifically, the evaporating unit 30 has a working fluid channel 31 formed therein, and a heat exchange fin 32 provided outside thereof. In the evaporation unit 30, the working fluid flowing through the flow path 31 is vaporized by heat obtained from the outside air via the heat exchange fins 32. In other words, the surrounding area of the evaporation unit 30 is cooled by the heat fluid being removed by vaporization of the working fluid. Then, as shown in FIG. 2, the object to be cooled is cooled by sending the cool air cooled using the fan F to the object to be cooled.
[0021]
The liquid channel 40 is a channel that connects the condensing unit 20 and the evaporation unit 30. The liquid flow path 40 is for moving the working fluid condensed in the condensing unit 20 from the condensing unit 20 to the evaporating unit 30. The vapor channel 50 is a channel that connects the condensing unit 20 and the evaporation unit 30 separately from the liquid channel 40. The vapor channel 50 is for moving the working fluid vaporized in the evaporation unit 30 from the evaporation unit 30 to the condensation unit 20. The arrangement relationship between the liquid channel 40 and the vapor channel 50 is such that the vapor channel 50 is positioned above the liquid channel 40. This is because the density of the working fluid passing through the vapor channel 50 is smaller than the density of the working fluid passing through the liquid channel 40. Therefore, as shown in FIGS. 3A and 3B, the vapor channel 50 is connected to the top end side of the upper part of the condensing unit 20 via a header (not shown), while the liquid channel 50 40 is connected to the lower end side of the condensing unit 20 via a header (not shown). Thereby, the working fluid can flow through the flow path inside the condensing unit 20 due to its gravity.
[0022]
As described above, such a heat pipe 11 is provided with the liquid flow path 40 and the vapor flow path 50 separately, and is called a loop thermosiphon heat pipe.
[0023]
The cold transfer device 10 having the above-described configuration transfers cold heat obtained from the cold heat unit 3 of the Stirling refrigerator 1 to a predetermined cooling site in the vending machine 2 by the heat pipe 11 as follows.
[0024]
As a premise of such cold heat transfer, it is necessary to operate the Stirling refrigerator 1. When the Stirling refrigerator 1 is operated, the Stirling refrigerator 1 generates a low temperature cold heat part 3 and a high temperature high heat part 4.
[0025]
In the condensing unit 20 that is thermally connected to the cooling unit 3 of the Stirling refrigerator 1, the working fluid (gas state) that is steam is rapidly cooled and condensed by the cooling heat obtained from the cooling unit 3. Thereby, the working fluid becomes a condensate (liquid state). Then, since the density of the working fluid that has become the condensate becomes larger than that in the case of steam, the working fluid flows downward due to the gravity. Then, the working fluid that is the condensate moves to the evaporation unit 30 through the liquid channel 40.
[0026]
In the evaporating unit 30 disposed at a predetermined cooling site, the working fluid (liquid state) which is a condensate is vaporized by heat obtained from the outside air via the heat exchange fins 32 and is vaporized (gas state). become. In other words, the outside air in the peripheral region of the evaporation unit 30 is cooled by removing heat from the working fluid being vaporized. As a result, by sending the outside air cooled using the fan F to the storage or the like, the product in the storage can be cooled. That is, the cooling heat obtained from the cooling unit 3 of the Stirling refrigerator 1 is transferred to a predetermined cooling site (lower part of the storage).
[0027]
On the other hand, the working fluid that has become a vapor flows upward because its density is smaller than that of the condensate. Then, the working fluid that is steam moves to the condensing unit 20 through the steam channel 50. The working fluid thus moved to the condensing unit 20 is condensed again and repeats the above phase change.
[0028]
In this way, the cooling fluid obtained from the cooling unit 3 of the Stirling refrigerator 1 is circulated through the condensing unit 20, the liquid channel 40, the evaporation unit 30, and the vapor channel 50 while changing the working fluid phase. It can be transferred to a predetermined cooling site.
[0029]
According to the cold transfer device 10 as described above, the heat pipe 11 circulates between the condensing unit 20, the liquid channel 40, the evaporation unit 30, and the vapor channel 50 while changing the phase of the working fluid, thereby performing the Stirling refrigeration. Since the cold energy obtained from the cold heat part 3 of the machine 1 is transferred, the temperature difference between the cold heat obtained from the cold heat part 3 and the transferred cold heat can be made extremely low. Therefore, the cold heat obtained from the cold heat unit 3 can be efficiently transferred to a predetermined cooling site. In addition, since the liquid flow path 40 and the vapor flow path 50 are provided separately, the working fluid condensed by the condensing unit 20 and the working fluid vaporized by the evaporation unit 30 do not collide and are stable. It is possible to transfer the cold energy obtained from the cold heat unit 3. Further, since the working fluid is circulated based on the difference in gravity in various states of the working fluid, no driving means for circulating the working fluid is required, and the cost required for the heat pipe 11 is high. Don't be.
[0030]
Moreover, according to the cold transfer apparatus 10, since the cooling unit 3 of the Stirling refrigerator 1 and the condensing unit 20 of the heat pipe 11 are thermally connected through the heat transfer block 61, the heat transfer unit Due to the presence of the block 61, the surface area of the cooling unit 3, that is, the heat transfer area can be increased. Thereby, in the condensation part 20, the thermal resistance at the time of condensation of a working fluid can be reduced, and the heat exchange rate in this condensation part 20 can be made high.
[0031]
As mentioned above, although Embodiment 1 of this invention was described, this invention is not limited to this, A various change can be performed. Hereinafter, various modifications of the first embodiment of the present invention will be described.
[0032]
4 and 5 show a modification of the heat pipe according to Embodiment 1 of the present invention, both (a) being a sectional side view, and (b) being an XX of (a). It is line sectional drawing.
[0033]
In FIG. 4, the condensing unit 20 has a cylindrical shape as described above, and is thermally connected to the cooling unit 3 of the Stirling refrigerator 1 with a heat transfer block (not shown) interposed therebetween. It is. A working fluid channel (not shown) is formed inside the condensing unit 20. At the upper part of the condensing unit 20, a steam flow path 50 is connected via a header 62 to the distal end side (the right side in FIG. 4A) and the proximal end side (the left side in FIG. 4A). It is. More specifically, the working fluid from the vapor channel 50 flows into the upper part of the condensing unit 20 from both the front end side and the base end side. This steam flow path 50 is branched in the middle.
[0034]
On the other hand, a liquid flow path is connected to the lower end of the condensing unit 20 on the distal end side and the proximal end side thereof. More specifically, the liquid flow path 40 is connected to the lower end of the condensing unit on the front end side and the base end side via the header 63. That is, in the lower part of the condensing unit 20, the working fluid that has become a condensate flows out from both the front end side and the base end side to the liquid flow paths 40a and 40b. These liquid flow paths 40 a and 40 b merge together to become the liquid flow path 40.
[0035]
According to such a configuration, the working fluid from the vapor channel 50 can be made to uniformly flow into the channel of the condensing unit 20 from the front end side and the base end side of the condensing unit 20. Thereby, cold heat can be reliably obtained from the entire side peripheral surface of the cold heat unit 3 of the Stirling refrigerator 1. Therefore, the heat exchange rate in the condensation unit 20 can be increased.
[0036]
In FIG. 5, the condensing unit 20 has a cylindrical shape as described above, and is thermally connected to the cooling unit 3 of the Stirling refrigerator 1 with a heat transfer block (not shown) interposed therebetween. It is. A working fluid channel (not shown) is formed inside the condensing unit 20. In the upper and lower parts of the condensing unit 20, the vapor channel 50 and the liquid channel 40 are headers so that the working fluid flows uniformly into and out of the channel of the condensing unit 20. 64 and 65 are connected.
[0037]
Even with such a configuration, the working fluid from the vapor flow path 50 can be made to uniformly flow into the flow path of the condensing unit 20, whereby the heat exchange rate in the condensing part 20 can be increased.
[0038]
In addition, the number of the steam flow paths 50 is one, but generally, the steam working fluid has a larger flow velocity than the condensate working fluid, and therefore there may be two steam flow paths. When there are two steam flow paths in this way, each steam flow path 51 is connected to the upper part of the condensing unit 20 as shown in FIGS. 3 (c), 4 (c) and 5 (c). Just do it.
[0039]
FIGS. 6-8 shows the modification of the heat-transfer block in Embodiment 1 of this invention. 6 and 7, cutting portions 66 a and 67 a are formed in the heat transfer blocks 66 and 67 that cover the front end surface 3 a of the cooling unit 3 of the Stirling refrigerator 1. Thus, by forming the cutting parts 66a and 67a, the heat capacity of the heat transfer blocks 66 and 67 themselves can be reduced. As a result, the heat exchange rate between the cooling unit 3 of the Stirling refrigerator 1 and the working fluid of the condensing unit 20 can be increased.
[0040]
In FIG. 8, the form of the heat transfer block 68 is not different from the form of the heat transfer block 61 according to the first embodiment. The condensing part 21 of the heat pipe 11 includes a cylindrical part 21a and a flat part 21b. The cylindrical portion 21a is the same as the condensing unit 20 according to the first embodiment, and has a cylindrical shape corresponding to the side peripheral surface 3b of the cooling / heating unit 3 of the Stirling refrigerator 1. The flat surface portion 21b corresponds to the front end surface 3a of the cooling / heating unit 3 of the Stirling refrigerator 1, and has a circular flat plate shape. Thus, since the condensing part 21 has the plane part 21b, cold can be effectively obtained also from the front end surface 3a of the cooling part 3 of the Stirling refrigerator 1, and the cooling part 3 and the condensation part 21 are condensed. The heat exchange rate with the working fluid of the part 21 can be increased.
[0041]
FIG. 9 shows a modification of the flow path of the condensing part in Embodiment 1 of the present invention, (a) is an enlarged cross-sectional view of the flow path of the condensing part, and (b) is (a). It is the expanded view which expand | deployed and showed simply the condensation part in. In FIG. 9, the condensing unit 22 has pin fins (convex projections) on the inner wall surface 222 on the side in contact with the heat transfer block 61, that is, on the side in contact with the cooling unit 3 of the Stirling refrigerator 1 in the working fluid flow path 221. A plurality of (like bodies) 223 are formed. Thereby, the heat-transfer area with respect to the working fluid in this condensation part 22 can be expanded. Further, although a plurality of pin fins 223 are formed, since the working fluid flow path 221 is secured, the resistance to the flow of the working fluid is not so great. Therefore, the heat exchange rate between the cooling unit 3 and the working fluid flowing through the flow path 221 of the condensing unit 22 can be increased.
[0042]
FIG. 10 shows a modified example of the flow path of the condensing unit in the first embodiment of the present invention, as in FIG. 9, and (a) is shown by vertically cutting the condensing unit at an appropriate location. It is a longitudinal cross-sectional view, (b) is a development view schematically showing the condensing part in (a). In FIG. 10, the condensing unit 23 is formed such that a plurality of fins 231 are arranged in the horizontal direction of the condensing unit 23, that is, in the direction from the front end side to the base end side of the condensing unit 23. A working fluid channel 232 is formed between the fins 231. Thereby, the heat-transfer area with respect to the working fluid in this condensation part 23 can be expanded. Therefore, the heat exchange rate between the cooling unit 3 and the working fluid flowing through the flow path 232 of the condensing unit 23 can be increased. Moreover, the condensation part 24 may make the surface of each fin 241 uneven as shown in FIG. As a result, the surface area of the fins 241 can be increased, so that the heat transfer area for the working fluid in the condensing unit 24 can be increased.
[0043]
<Embodiment 2>
FIG. 12 is an explanatory diagram simply showing the cold heat transfer device of the Stirling refrigerator according to the second embodiment of the present invention. In addition, what has the same structure as the cold heat transfer apparatus 10 of the Stirling refrigerator 1 which concerns on the above-mentioned Embodiment 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. In FIG. 12, the cold heat transfer device 70 of the Stirling refrigerator 1 includes a plurality of (two) heat pipes as heat transfer means, that is, a first heat pipe 12 and a second heat pipe 13. It is prepared. The 1st heat pipe 12 and the 2nd heat pipe 13 are provided with condensation parts 25a and 25b, evaporation parts 34 and 35, liquid channel 40, and vapor channel 50, respectively.
[0044]
The condensing parts 25 a and 25 b of the first heat pipe 12 and the second heat pipe 13 are thermally connected to the cooling part 3 of the Stirling refrigerator 1. More specifically, each of the condensing parts 25a, 25b has a semi-cylindrical shape having a diameter larger than that of the cooling / heating part 3, and a working fluid channel (not shown) is formed therein. . And each condensation part 25a, 25b is thermally connected to the cooling-heat part 3 through the heat-transfer block 61. In each condensing part 25a, 25b, the working fluid is condensed by the cold heat obtained from the cold heat part 3. Further, the respective condensing parts 25a and 25b are movable by actuators 71 and 72 as shown in FIG. That is, each condensing part 25a, 25b becomes a mode which can be separated from cold part 3.
[0045]
The respective evaporation units 34 and 35 of the first heat pipe 12 and the second heat pipe 13 are arranged in a predetermined part of the vending machine, for example, in a lower part of a storage for storing a product. The functions and the like of the evaporation units 34 and 35 are the same as those of the evaporation unit 30 in the first embodiment.
[0046]
In the cold transfer device 70 of the Stirling refrigerator 1 having the above-described configuration, for example, when it is not necessary to cool the product in the container that is the cooling target of the evaporation unit 35 of the second heat pipe 13, the actuator 72 is used. The condensing unit 25b of the second heat pipe 13 is separated from the cooling unit 3 of the Stirling refrigerator 1 by driving. By doing so, even if the Stirling refrigerator 1 is operating, the second heat pipe 13 does not transfer cold heat. Thereby, the goods of the storage in which the evaporation part 35 of the 2nd heat pipe 13 is arrange | positioned are not cooled.
[0047]
On the other hand, when it is necessary to cool the goods in the storage container that is the cooling target of the evaporation units 34 and 35 of the first heat pipe 12 and the second heat pipe 13, the actuators 71 and 72 are driven to The condensing units 25 a and 25 b are thermally connected to the cooling unit 3 of the Stirling refrigerator 1. By doing so, the cold / heat obtained in the cold / hot part 3 can be transferred to each storage. As a result, the product accommodated in each storage can be cooled.
[0048]
<Embodiment 3>
FIG. 14: shows the principal part of the heat pipe which comprises the cold heat transfer apparatus of the Stirling refrigerator which concerns on Embodiment 3 of this invention, (a) is a side view, (b) is (a Is a sectional view taken along line XX in FIG. In addition, what has the same structure as the cold heat transfer apparatus 10 of the Stirling refrigerator 1 which concerns on the above-mentioned Embodiment 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. In FIG. 14, the cold heat transfer device of the Stirling refrigerator 1 includes a heat pipe 14 as heat transfer means. The heat pipe 14 includes a condensing unit 26, an evaporation unit 30, a liquid channel 40, and a vapor channel 50.
[0049]
As shown in FIG. 14, the condensing unit 26 includes an upper condensing unit 27 and a lower condensing unit 28. The upper condensing unit 27 has a semi-cylindrical shape so as to correspond to the upper peripheral surface of the cooling unit 3 of the Stirling refrigerator 1. The upper condensing unit 27 is thermally connected to the cooling unit 3 with a heat transfer block (not shown) interposed therebetween. The upper condensing unit 27 has one vapor channel 52 connected to the upper part via a header 73 and two liquid channels 41 and 42 connected to the lower part via headers 74 and 75. is there.
[0050]
The lower condensing unit 28 has a semi-cylindrical shape so as to correspond to the lower peripheral surface of the cooling unit 3 of the Stirling refrigerator 1. The lower condensing unit 28 is connected to the cooling unit 3 through a heat transfer block (not shown). The lower condensing unit 28 has two vapor channels 53 and 54 branched in the middle thereof connected via headers 76 and 77 to the upper part of the lower condensing unit 28, and one liquid channel 43 is connected to the header 78 at the lower part. Connected through. Here, although not shown, the steam flow paths 52, 53, and 54 are obtained by branching the steam flow path 50 into three on the way. Although not shown, the liquid flow paths 41, 42, and 43 connected to the upper condensing unit 27 and the lower condensing unit 28 are joined together to form the liquid flow path 40.
[0051]
FIG. 15 shows a cross section of the upper condensing unit and the lower condensing unit, (a) is a cross section of the upper condensing unit, is a cross-sectional view taken along line AA in FIG. 14 (b), (b) is It is a section of a lower condensation part, and is a BB line sectional view in Drawing 14 (b).
[0052]
As shown in FIG. 15A, the upper condensing part 27 is provided with a plurality of upper columnar parts 273 between an inner wall (first wall) 271 and an outer wall (second wall) 272. Thus, a flow path 274 for the working fluid is formed. Here, the inner wall 271 is a wall in contact with the cooling unit 3 of the Stirling refrigerator 1 through a heat transfer block (not shown). In the upper condensing portion 27, the plurality of upper columnar portions 273 are sufficiently thick.
[0053]
As shown in FIG. 15 (b), the lower condensing portion 28 is provided with a plurality of lower columnar portions 283 between the inner wall (third wall) 281 and the outer wall 282, and the working fluid The flow path 284 is formed. In the lower condensing part 28, the thicknesses of the inner wall 281 and the outer wall 282 are smaller than the thicknesses of the inner wall 271 and the outer wall 272 constituting the upper condensing part 27. Further, the thickness of each of the lower columnar portions 283 is smaller than the thickness of the upper columnar portion 273. Therefore, each flow path 284 in the lower condensing part 28 has a larger separation distance between the inner wall 281 and the outer wall 282 than each flow path 274 in the upper condensing part 27 and has a large volume. It has become.
[0054]
FIGS. 16A and 16B are diagrams showing a mechanism of the flow of the working fluid in the flow path in FIG. 15, where FIG. 16A relates to the upper condensing unit and FIG. 16B relates to the lower condensing unit. This will be described with reference to FIG.
[0055]
According to the cooling heat transfer device of the Stirling refrigerator 1 having the above-described configuration, the thickness of the upper columnar portion 273 is sufficiently large, so that the cold heat obtained from the cooling portion 3 through the inner wall 271 is sufficiently transferred to the outer wall 272. Can communicate. Therefore, in the upper condensing unit 27, as shown in FIG. 16A, the working fluid that has been heat-exchanged with the cold heat obtained from the cold heat unit 3 to become a condensed liquid becomes an inner wall due to its gravity and surface tension. Even when the surface of 271 is covered, the working fluid is condensed because the cold heat is sufficiently transmitted to the outer wall 272 as well. From the above, the upper columnar portion 273 constitutes a cold heat transmission means for transmitting cold heat obtained from the cold heat portion 3 to the outer wall 272 that is a wall not in contact with the cold heat portion 3.
[0056]
On the other hand, in the lower condensing part 28, as shown in FIG. 16 (b), the working fluid that is heat-exchanged with the cold heat obtained from the cold heat part 3 to become a condensate is outside due to its gravity and surface tension. The surface of the wall 282 is covered. However, since the distance between the inner wall 281 and the outer wall 282 in each flow path 284 is large, there is no possibility that the condensate covering the outer wall 282 reaches the inner wall 281. That is, in the lower condensing unit 28, there is a gap between the working fluid that is in a vapor state and the inner wall 281 that is a wall in contact with the cooling unit 3. Due to the existence of such a gap, the working fluid is positively condensed on the inner wall 281 having the highest heat transfer capability, and the heat exchange rate can be increased.
[0057]
【The invention's effect】
  As described above, according to the first aspect of the present invention, the heat transfer means circulates between the condensing unit, the liquid channel, the evaporation unit, and the vapor channel while changing the phase of the working fluid, so that the Stirling refrigeration is performed. Since the cold heat obtained from the cold heat part of the machine is transferred, the temperature difference between the cold heat obtained from the cold heat part and the transferred cold heat can be made extremely low.,coldThe cold energy obtained from the hot part can be efficiently transferred to a predetermined cooling site.In addition, the working fluid from the steam channel can be uniformly introduced into the channel of the condensing unit from the front end side and the base end side of the condensing unit, thereby reliably from the entire side peripheral surface of the cooling unit of the Stirling refrigerator. Cold energy can be obtained. Therefore, the heat exchange rate in the condensing part can be increased. Further, since the vapor flow path and the liquid flow path are connected so that the working fluid can move inside the condensing part by its gravity, no driving means for circulating the working fluid is required.
[0058]
  According to the invention of claim 2,In the case where the condensing part constituting each heat transfer means is connected in a separable manner with the cold part, and any one of the cooling parts where the heat transfer means transfers the cold does not require cooling, Since the condensing part of the heat transfer means corresponding to the cooling part is separated from the cold part of the Stirling refrigerator, cold heat is not transferred to the cooling part.
[0059]
  According to the invention of claim 3,The condensing part constituting each heat transfer means is connected in a manner that can be separated from the cold part, and the actuator is connected to the condensing part of each heat transfer means according to the necessity of cooling of each cooling part. Since it is thermally connected to or separated from the cold part, it is possible to reliably transfer cold heat to cooling parts that require cooling, and to transfer cold heat to cooling parts that do not require cooling. Absent.
[0060]
  According to the invention of claim 4,Since the heat transfer block is interposed between the cooling unit of the Stirling refrigerator and the condensation, the surface area of the cooling unit, that is, the heat transfer area can be increased by the presence of the heat transfer block. Thereby, in a condensation part, the thermal resistance at the time of condensation of a working fluid can be reduced, and the heat exchange rate in this condensation part can be made high.
[0061]
  According to the invention as set forth in claim 5,Inside the condensing part, a plurality of fins are arranged in parallel in the direction from the front end side to the base end side of the condensing part, and a working fluid flow path is formed between these fins, and the surface of the fin is uneven. Therefore, the heat transfer area for the working fluid in the condensing part can be expanded, the heat exchange rate between the cooling part and the working fluid flowing through the flow path of the condensing part can be increased, and the fin By making the surface uneven, the surface area of the fins can be increased, so that the heat transfer area for the working fluid in the condensing part can be expanded.
[0062]
  According to the invention as set forth in claim 6,Since the condensing part constituting each heat transfer means is connected in a manner that can be separated from the cold part, if the predetermined cooling part does not need to be cooled, the corresponding condensing part can be separated from the cold part. it can. Thereby, cold heat is not transferred to the predetermined cooling portion.
[0063]
According to the seventh aspect of the present invention, the actuator thermally connects or separates the condensing part of each heat transfer means to the cooling part of the Stirling refrigerator depending on whether the cooling of each cooling part is necessary. Therefore, it is possible to reliably transfer cold heat to a cooling portion that requires cooling, and to transfer cold heat to a cooling portion that does not require cooling.
[0064]
According to the invention described in claim 8, the condensing part has an upper condensing part and a lower condensing part that can be separated from each other, and each of the upper condensing part and the lower condensing part is operated individually. Since the vapor flow path and the liquid flow path are connected so that the fluid can move due to the gravity, no driving means for circulating the working fluid is required.
[0065]
According to the ninth aspect of the present invention, in the upper condensing part, the cold heat transfer means transmits the cold heat obtained from the cold heat part of the Stirling refrigerator to the second wall not in contact with the cold heat part. As a result, even if the working fluid that is heat-exchanged with the cold heat obtained from the cold heat portion and becomes a condensate covers the surface of the first wall in contact with the cold heat portion due to its gravity and surface tension. The cooling fluid is sufficiently transmitted to the second wall, so that the working fluid can be cooled well. As a result, the working fluid is condensed. On the other hand, the interior of the lower condensing unit has a volume that allows a gap to exist between the third wall and the condensed working fluid, at least when the Stirling refrigerator is in operation. Therefore, the working fluid is positively condensed on the third wall having the highest cooling capacity, and the heat exchange rate can be increased.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a cold heat transfer device of a Stirling refrigerator according to a first embodiment of the present invention.
FIG. 2 is an explanatory diagram simply showing the cold heat transfer device of the Stirling refrigerator in FIG. 1;
3 is a view showing a condensing part constituting the heat pipe in FIG. 1, (a) is a sectional side view, (b) is a sectional view taken along line XX in (a), and (c) is another view. It is sectional drawing which showed the modification.
FIGS. 4A and 4B are diagrams showing a condensing unit constituting the heat pipe in Embodiment 1 of the present invention, wherein FIG. 4A is a cross-sectional side view, FIG. 4B is a cross-sectional view taken along line XX in FIG. c) is a sectional view showing another modification.
FIGS. 5A and 5B are diagrams showing a condensing unit constituting the heat pipe according to Embodiment 1 of the present invention, where FIG. 5A is a cross-sectional side view, FIG. 5B is a cross-sectional view along line XX in FIG. c) is a sectional view showing another modification.
FIG. 6 is a cross-sectional view showing a modification of the heat transfer block in the first embodiment of the present invention.
FIG. 7 is a cross-sectional view showing a modification of the heat transfer block in the first embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a modification of the heat transfer block in the first embodiment of the present invention.
9 shows a modification of the flow path of the condensing unit in Embodiment 1 of the present invention, (a) is an enlarged cross-sectional view of the flow path of the condensing unit, and (b) is (a). It is the expanded view which expand | deployed and showed simply the condensation part in.
FIG. 10 shows a modification of the flow path of the condensing unit in Embodiment 1 of the present invention, and (a) is a longitudinal sectional view showing the condensing unit cut vertically at an appropriate location. (B) is a developed view schematically showing the condensing part in (a).
FIG. 11 is a view showing another modification of the condensing unit shown in FIG.
FIG. 12 is an explanatory diagram simply showing a cold heat transfer device for a Stirling refrigerator according to a second embodiment of the present invention.
13 is an explanatory diagram showing a separable state of the condensing unit in FIG. 12;
FIG. 14 is a view showing a main part of a heat pipe constituting a cold heat transfer device of a Stirling refrigerator according to a third embodiment of the present invention.
FIGS. 15A and 15B show cross sections of an upper condensing unit and a lower condensing unit, wherein FIG. 15A is a cross-sectional view taken along line AA in FIG. 14B, and FIG. It is a BB sectional view.
16A and 16B are diagrams showing a mechanism of the flow of the working fluid in the flow path in FIG. 15, wherein FIG. 16A relates to the upper condensing unit, and FIG. 16B relates to the lower condensing unit.
[Explanation of symbols]
1 Stirling refrigerator
2 Vending machines
3 Cooling section
4 high heat part
10,70 Cold transfer device
11, 12, 13, 14 Heat pipe
20, 21, 22, 23, 24, 25a, 25b Condensing part
30, 34, 35 Evaporation section
31 channel
32 Heat exchange fins
40 Liquid flow path
50 Steam flow path
61, 66, 67, 68 Heat transfer block
66a, 67a Cutting part
71, 72 Actuator
221 flow path
222,232 inner wall
223 pin fin
231 and 241 fins

Claims (9)

In the cold heat transfer device of the Stirling refrigerator, the cold heat obtained from the cylindrical cold heat portion of the Stirling refrigerator placed horizontally is transferred to a predetermined cooling site by heat transfer means equipped with a working fluid.
The heat transfer means includes a condensing unit thermally connected to the cooling unit, an evaporating unit disposed in the cooling part, and a liquid for moving the working fluid condensed in the condensing unit to the evaporating unit. flow path and is intended to circulate while the vaporized working fluid phase by varying the pre-Symbol working fluid and a vapor passage for moving to said condenser section at the evaporator section,
The condensing part is configured to cover the periphery of the cold part, and the steam flow path is branched in the middle so that the working fluid can move inside the condensing part by its gravity, and the top end side of the upper part of the condenser And connecting to the distal end side and the proximal end side of the condensing unit by branching the liquid flow path in the middle and connecting to the distal end side and the proximal end side of the condensing unit. The working fluid from the vapor channel is allowed to flow from both sides, and the working fluid that has become a condensed liquid flows from both the front end side and the base end side of the lower part of the condensing unit to the liquid channel. A heat transfer device for a Stirling refrigerator characterized by the above. In the cold transfer device of the Stirling refrigerator, the cold heat obtained from the cold part of the Stirling refrigerator is transferred to a predetermined cooling site by a plurality of heat transfer means provided with a working fluid.
The plurality of heat transfer means move the condensing unit thermally connected to the cooling unit, the evaporating unit disposed in the cooling part, and the working fluid condensed in the condensing unit to the evaporating unit. A liquid flow path and a vapor flow path for moving the working fluid vaporized in the evaporation section to the condensation section, and circulating the working fluid while changing the phase,
The condensing part constituting each heat transfer means is thermally connected in a manner separable from the cold part,
Among the cooling parts to which each of the heat transfer means transfers cold heat, when any of the cooling parts does not require cooling, the condensing part of the heat transfer means corresponding to the cooling part is separated from the cold heat part. A cooling heat transfer device for a Stirling refrigerator. In the cold transfer device of the Stirling refrigerator, the cold heat obtained from the cold part of the Stirling refrigerator is transferred to a predetermined cooling site by a plurality of heat transfer means provided with a working fluid.
The plurality of heat transfer means move the condensing unit thermally connected to the cooling unit, the evaporating unit disposed in the cooling part, and the working fluid condensed in the condensing unit to the evaporating unit. A liquid flow path and a vapor flow path for moving the working fluid vaporized in the evaporation section to the condensation section, and circulating the working fluid while changing the phase,
The condensing part constituting each heat transfer means is thermally connected in a manner separable from the cold part,
Each of the heat transfer means includes an actuator for thermally connecting or separating each condensing unit with respect to the cooling unit according to necessity of cooling of a cooling part that transfers the cooling energy. A cold transfer device for the Stirling refrigerator. The heat transfer device for a Stirling refrigerator according to any one of claims 1 to 3, wherein a heat transfer block is interposed between the condensing unit and the cold heat unit. Inside the condensing part, a plurality of fins are arranged in parallel in the direction from the front end side to the base end side of the condensing part, a working fluid flow path is formed between these fins, and the surface of the fin is 5. The cold heat transfer device for a Stirling refrigerator according to any one of claims 1 to 4, wherein the heat transfer device is uneven . 6. The heat transfer means is provided in plural, and the condensing part constituting each heat transfer means is thermally connected in a manner separable from the cold heat part. A cold heat transfer device for a Stirling refrigerator as described in 1. above. The heat transfer means includes an actuator for thermally connecting or separating the condensing part of each heat transfer means with respect to the cold heat part in accordance with the necessity of cooling of the cooling portion where the cold heat is transferred. The cold heat transfer device for a Stirling refrigerator according to claim 2 .   The condensing unit includes an upper condensing unit and a lower condensing unit that are separable from each other, and each of the upper condensing unit and the lower condensing unit is configured so that the working fluid can move individually by gravity. The cold transfer device for a Stirling refrigerator according to any one of claims 1 to 7, wherein the flow channel and the liquid flow channel are connected. Inside the upper condensing unit, the cooling heat obtained from the cooling unit is provided between the first wall in contact with the cooling unit and the second wall facing the first wall. A heat transfer means for transmitting to the wall of the
The inside of the lower condensing unit is large enough that a gap can exist between the third wall on the side in contact with the cooling unit and the condensed working fluid at least when the Stirling refrigerator is in operation. The cold heat transfer device for a Stirling refrigerator according to claim 8, wherein the heat transfer device has a specific volume.

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