JP2007327733A - Showcase - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a showcase preferable from a viewpoint of environmental protection, and cooling commodities by efficiently transporting cold heat generated from a Stirling refrigerating machine to a commodity housing box. <P>SOLUTION: This showcase 1 is provided with: the commodity housing box 13 arranged in a case body 10; and the Stirling refrigerating machine 20 used as a cooling source for commodities housed in the commodity housing box 13. The showcase is also provided with: a condensation heat exchanger 31 condensing a refrigerant flowing through a passage by cold heat generated from a low-temperature part 21 of the Stirling refrigerating machine 20; an evaporation heat exchanger 32 cooling the commodities in the commodity housing box 13 by evaporating the refrigerant flowing through an evaporation passage 32a arranged in a form winding around the commodity housing box 13; and a cold heat transport means 30 having a liquid line 33 delivering the refrigerant from the condensation heat exchanger 32 to the evaporation heat exchanger 32, and a liquid line 34 returning the refrigerant from the evaporation heat exchanger 32 to the condensation heat exchanger 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a showcase, and more particularly to an improvement in a showcase that sells products such as ice cream.

  Conventionally, showcases for selling products such as ice cream are known. Such a showcase includes a commodity storage box disposed inside a housing having an opening on the upper surface, and a sliding door type glass door for opening and closing the opening. The product storage box is a box made of a heat transfer material such as a metal material and having an upper surface opened. A heat insulating material is laid around the product storage box. A cooling pipe is attached to the peripheral surface of the commodity storage box. This cooling pipe constitutes a refrigeration circuit with a compressor, a condenser and the like disposed in the casing.

  In such a showcase, when the product stored in the product storage box is cooled by the operation of the refrigeration circuit and the glass door is opened and the opening is opened, the product is stored in the product storage box through the opening. The product can be taken out (see, for example, Patent Document 1 and Patent Document 2).

JP-A-5-045046 JP-A-8-303927

  By the way, in the showcase as described above, since the chlorofluorocarbon refrigerant is used in the refrigeration circuit for cooling the merchandise stored in the merchandise storage box, if the chlorofluorocarbon refrigerant is released into the atmosphere, There is a possibility of destroying the layer, which is not preferable from the viewpoint of environmental protection.

  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, condenser, etc., and compresses and expands internal gas using a reciprocating compressor, generating cold in the low-temperature part and increasing the temperature. It generates high-temperature exhaust heat at the part. Here, a natural refrigerant such as helium gas is used as the internal 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.

  However, since the Stirling refrigerator uses the refrigeration effect due to compression and expansion of the internal gas, the structure of the compression / expansion space is limited, and the area of the low temperature portion is limited to a small portion. Therefore, when a Stirling refrigerator is used, a technique for efficiently transporting the cold heat generated in the low temperature part to a predetermined cooling site that needs to be cooled is required.

  In view of the above circumstances, the present invention provides a showcase that is preferable from the viewpoint of environmental protection and that can efficiently cool the product by transporting the cold generated in the low temperature part of the Stirling refrigerator to the product storage box efficiently. For the purpose.

  In order to achieve the above object, a showcase according to claim 1 of the present invention is disposed inside a housing having an opening on an upper surface thereof, and includes a product storage box for storing products, A Stirling refrigerator that is disposed inside and serves as a cooling source for the product stored in the product storage box, and a door body that opens and closes the opening, and the door is opened to open the opening. When the product is opened, the showcase in which the product stored in the product storage box can be taken out through the opening has a flow path thermally connected to the low temperature portion of the Stirling refrigerator. A condenser heat exchanger that condenses the working fluid that flows through the flow path by the cold generated in the low-temperature portion, and a flow path that is arranged in a manner to wind the commodity storage box, and flows through the flow path The working fluid evaporates and is stored in the product storage box. An evaporative heat exchanger for cooling the product, a delivery flow path for delivering the working fluid condensed in the condensation heat exchanger to the evaporating heat exchanger, and the working fluid evaporated in the evaporative heat exchanger A return flow path for returning to the heat exchanger, and provided with a cold transport means for transporting the cold generated in the low temperature part of the Stirling refrigerator to the commodity storage box by circulating the working fluid. It is characterized by.

  A showcase according to claim 2 of the present invention is characterized in that, in claim 1 described above, the Stirling refrigerator is arranged vertically.

  A showcase according to claim 3 of the present invention has a flow channel thermally connected to the high temperature portion of the Stirling refrigerator in claim 1 or 2 described above, and flows through the flow channel. A working heat fluid that receives high-temperature exhaust heat generated in the high-temperature part in the working fluid, and a working fluid that flows in a flow path provided in the interior are disposed at a position separated from the Stirling refrigerator by a predetermined distance. An air heat exchanger for exchanging heat with the ambient air, a delivery flow path for sending the working fluid that has received high-temperature exhaust heat by the heat dissipation heat exchanger to the air heat exchanger, and the air heat exchanger A return flow path for returning the working fluid exchanged with air to the radiating heat exchanger, and circulating the working fluid to the outside of the high-temperature exhaust heat generated in the high-temperature part of the Stirling refrigerator High temperature exhaust heat transport Characterized by comprising a means.

  The showcase according to claim 4 of the present invention is the showcase according to claim 3 described above, wherein the high-temperature exhaust heat transport means fully closes part of the high-temperature exhaust heat generated in the high-temperature part of the Stirling refrigerator. It transports to the said door body and heats this door body, It is characterized by the above-mentioned.

  Moreover, the showcase which concerns on Claim 5 of this invention is a mode in which the said evaporative heat exchanger winds around the area | region where goods storage boxes differ separately in any one of Claims 1-4 mentioned above. A plurality of disposed flow paths, the working fluid flowing through each flow path evaporates to cool the product stored in the product storage box, and the delivery flow path is provided in the middle The working fluid condensed by the condensing heat exchanger is branched at a branch point and sent to each of the flow paths, and the return flow path is a confluence provided in the middle of the evaporative heat exchange. The working fluid evaporated in each flow path constituting the vessel is joined and returned to the condensation heat exchanger.

  A showcase according to a sixth aspect of the present invention is the showcase according to any one of the first to fourth aspects, wherein the evaporative heat exchanger includes a plurality of commodity storage boxes disposed inside the casing. A plurality of flow paths arranged in a separately wound manner, and the working fluid flowing through each flow path evaporates to cool the products stored in each product storage box, The path is a branch point provided in the middle, and the working fluid condensed in the condensation heat exchanger is branched and sent to each of the flow paths, and the return flow path is a confluence provided in the middle In this respect, the working fluid evaporated in each flow path constituting the evaporating heat exchanger is merged and returned to the condensing heat exchanger.

  A showcase according to a seventh aspect of the present invention is the showcase according to the fifth or sixth aspect, wherein the condensing heat exchanger is provided at a location downstream of the branch point in the delivery channel. A valve means for allowing or restricting the movement of the condensed working fluid is provided.

  A showcase according to an eighth aspect of the present invention is the showcase according to any one of the fifth to seventh aspects, wherein the return flow path has the heat of evaporation at a location upstream from the junction. A valve means for allowing or restricting the movement of the working fluid evaporated by the exchanger is provided.

  A showcase according to a ninth aspect of the present invention is the showcase according to any one of the first to fourth aspects, wherein the cold heat transport means has a flow channel thermally connected to the delivery flow channel. A first heat exchanger that exchanges heat between the working fluid that flows through the flow path and the working fluid that passes through the delivery flow path, and a commodity storage box around which the flow path constituting the evaporating heat exchanger is wound. A second heat exchanger that has a flow path wound around a region different from the region, the working fluid flowing through the flow path evaporates, and cools the product stored in the product storage box; and the first heat exchange A delivery line for delivering the working fluid heat-exchanged in the heat exchanger to the second heat exchanger, and a return line for returning the working fluid evaporated in the second heat exchanger to the first heat exchanger The working fluid is circulated between them.

  A showcase according to a tenth aspect of the present invention is the showcase according to any one of the first to fourth aspects, wherein the cold heat transport means has a flow channel thermally connected to the delivery flow channel. A first heat exchanger for exchanging heat between the working fluid flowing through the flow path and the working fluid passing through the delivery flow path, and a commodity storage box around which the flow path constituting the evaporating heat exchanger is wound Has a flow path for winding a separate product storage box, the second heat exchanger for cooling the product stored in the product storage box by evaporating the working fluid flowing through the flow path, and the first heat A delivery line for delivering the working fluid heat-exchanged in the exchanger to the second heat exchanger, and a feedback line for returning the working fluid evaporated in the second heat exchanger to the first heat exchanger. The working fluid is circulated between them.

  A showcase according to an eleventh aspect of the present invention is the showcase according to the ninth or tenth aspect, wherein the delivery flow path has a location downstream of a heat exchange location with the first heat exchanger. And a valve means for allowing or restricting movement of the working fluid condensed by the condensation heat exchanger, and allowing movement of the working fluid heat-exchanged by the first heat exchanger to the delivery line. Alternatively, a valve means for regulating is provided.

  A showcase according to a twelfth aspect of the present invention, in any one of the ninth to eleventh aspects, allows the return fluid to move the working fluid evaporated in the evaporative heat exchanger, Alternatively, valve means for regulating is provided, and valve means for allowing or regulating the movement of the working fluid evaporated in the second heat exchanger is provided in the return line.

  According to the present invention, the heat transport means has a flow path thermally connected to the low temperature part of the Stirling refrigerator, and the condensation heat exchange condenses the working fluid flowing through the flow path by the cold generated in the low temperature part. And an evaporative heat exchanger that has a flow path arranged in a manner of winding the product storage box, and evaporates the working fluid flowing through the flow path to cool the product stored in the product storage box, It has a delivery flow path for sending the working fluid condensed in the condensation heat exchanger to the evaporation heat exchanger, and a return flow path for returning the working fluid evaporated in the evaporation heat exchanger to the condensation heat exchanger Since the working fluid is circulated between the condensing heat exchanger, the delivery channel, the evaporating heat exchanger, and the return channel, the cold generated in the low temperature part of the Stirling refrigerator is transported to the product storage box, so the Stirling refrigerator To the product storage box Can be a temperature difference between the feed has been cold to very low, yet without using a chlorofluorocarbon-based refrigerant. Therefore, it is preferable from the viewpoint of environmental protection, and further, the product can be cooled by efficiently transporting the cold heat generated in the low temperature part of the Stirling refrigerator to the product storage box.

  Hereinafter, preferred embodiments of a showcase according to the present invention will be described in detail with reference to the accompanying drawings.

<Embodiment 1>
FIG. 1 and FIG. 2 each show a showcase in Embodiment 1 of the present invention in a simplified manner, FIG. 1 is a front view, and FIG. 2 is a sectional side view. The showcase 1 illustrated in FIGS. 1 and 2 is for selling a product such as ice cream, and includes a case main body 10.

  The case main body 10 is a housing having an opening 11 on the upper surface, and includes a glass door (door body) 12 for opening and closing the opening 11, and a product storage box 13 and a Stirling refrigerator inside. 20, a cold heat transport means 30 and a high temperature exhaust heat transport means 40 are provided.

  The glass door 12 is, for example, a sliding door type. When the glass door 12 is opened, the opening 11 is opened. When the glass door 12 is closed and fully closed, the opening 11 is closed. Is. Around such a glass door 12, a frame body 12a made of a heat transfer material such as a metal material is provided.

  The product storage box 13 is made of a heat transfer material such as a metal material, for example, and is a box having an upper surface opened. The product storage box 13 is disposed in the lower area of the opening 11 inside the case main body 10 and is for storing products. A heat insulating material 14 such as a heat insulating board is laid around the product storage box 13. Thereby, the goods storage box 13 is arrange | positioned by the inside of the case main body 10 with the heat insulated aspect.

  The Stirling refrigerator 20 is placed horizontally on the rear side of the opening 11 inside the case body 10 and above the commodity storage box 13. As shown in FIG. 3, the Stirling refrigerator 20 includes a cylindrical low temperature portion 21 that generates cold heat when operated, and a cylindrical high temperature portion 22 that generates high temperature exhaust heat.

  The cold heat transport means 30 transports the cold heat generated in the low temperature part 21 of the Stirling refrigerator 20 to the commodity storage box 13. As shown in FIG. 3, this cold heat transport means 30 is a heat pipe in which a cooling refrigerant (working fluid) is enclosed, and a condensing heat exchanger 31 and an evaporating heat exchanger 32 are connected to a liquid line. (Transmission channel) 33 and gas line (return channel) 34 are separately connected. Here, as the cooling refrigerant, for example, a gas (such as carbon dioxide) that is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 21 of the Stirling refrigerator 20 (an antifreeze refrigerant) is used.

  The condensing heat exchanger 31 is disposed in such a manner as to cover the side peripheral surface of the low temperature part 21 of the Stirling refrigerator 20. More specifically, the condensation heat exchanger 31 has a cylindrical shape whose diameter is larger than that of the low temperature portion 21 of the Stirling refrigerator 20, and a flow path (not shown) through which the cooling refrigerant passes. ) Is formed. The condensing heat exchanger 31 is thermally connected to the low temperature portion 21, and the cooling refrigerant in the flow path is condensed by the cold heat from the low temperature portion 21.

  The evaporative heat exchanger 32 is provided on the outer surface of the product storage box 13, and more specifically, has an evaporation path (flow path) 32 a provided in a manner of winding the product storage box 13. It is. The evaporation path 32a is for passage of the cooling refrigerant. In such an evaporative heat exchanger 32, as will be described in detail later, the cooling refrigerant passing through the evaporation path 32a evaporates due to the heat stored in the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13. Become steam. In other words, the products and the like stored in the product storage box 13 are cooled because heat is taken away as the cooling refrigerant evaporates. Moreover, since the evaporative heat exchanger 32 is provided on the outer surface of the commodity storage box 13, it is disposed below the reference height of the low temperature part 21 of the Stirling refrigerator 20.

  The liquid line 33 is a pipe line that connects the condensation heat exchanger 31 and the evaporation heat exchanger 32. The liquid line 33 is for sending the cooling refrigerant condensed in the condensation heat exchanger 31 from the condensation heat exchanger 31 to the evaporating heat exchanger 32.

  The gas line 34 is a pipe line that connects the condensation heat exchanger 31 and the evaporation heat exchanger 32 separately from the liquid line 33. The gas line 34 is for returning the cooling refrigerant evaporated in the evaporation heat exchanger 32 from the evaporation heat exchanger 32 to the condensation heat exchanger 31. Here, the gas line 34 is disposed above the liquid line 33. This is because the density of the cooling refrigerant passing through the gas line 34 is smaller than the density of the cooling refrigerant passing through the liquid line 33.

  In such a cold heat transport means 30, the cold heat from the low temperature part 21 of the Stirling refrigerator 20 is transported to the commodity storage box 13 as follows. The cooling refrigerant (gaseous refrigerant) passing through the flow path of the condensation heat exchanger 31 is cooled and condensed by the cold heat generated from the low temperature part 21, liquefies, and moves downward by the gravity. Thereafter, the cooling refrigerant moves to the evaporation heat exchanger 32 through the liquid line 33. In the evaporative heat exchanger 32, the cooling refrigerant evaporates by the heat of the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13 while passing through the evaporation path 32 a. That is, the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13 are cooled because heat is taken away, so that the cold generated in the low temperature part 21 of the Stirling refrigerator 20 is reduced to the product. It is transported to the storage box 13. By the way, the cooling refrigerant evaporated in the evaporating heat exchanger 32 reaches the condensing heat exchanger 31 through the gas line 34, is condensed again when passing through the flow path, and repeats the above-described cycle. As a result, the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13 are cooled to a desired cooling temperature (for example, −20 ° C. or the like).

  The cold heat transport means 30 is a loop-type thermostat in which a cooling refrigerant circulates between the condensation heat exchanger 31 and the evaporative heat exchanger 32 through a separately provided liquid line 33 and gas line 34. This is called a siphon heat pipe.

  The high-temperature exhaust heat transport means 40 transports high-temperature exhaust heat generated in the high-temperature part 22 of the Stirling refrigerator 20 to the outside, and includes a first heat radiation system pipe 40a and a second heat radiation system pipe 40b. It is. As shown in FIG. 3, the first heat radiating system pipe 40a is a heat pipe in which a heat radiating refrigerant (working fluid) is enclosed, and the first heat radiating heat exchanger 41 and the air heat exchanger 42 are connected to each other. The first line (delivery flow path) 43 and the second line (return flow path) 44 are separately connected. Here, for example, carbon dioxide, water, or the like is used as the heat radiation refrigerant. In the first embodiment, the heat radiation refrigerant will be described as carbon dioxide.

  The 1st heat radiation heat exchanger 41 is arrange | positioned in the aspect which covers the side surrounding surface of the high temperature part 22 of the Stirling refrigerator 20. More specifically, the first heat radiation heat exchanger 41 has a cylindrical shape whose diameter is larger than that of the high temperature portion 22 of the Stirling refrigerator 20, and a flow path through which the heat radiation refrigerant passes (see FIG. (Not shown). The first heat radiating heat exchanger 41 is thermally connected to the high temperature portion 22, and the heat radiating refrigerant in the flow path evaporates due to the high temperature exhaust heat from the high temperature portion 22, or the outside air temperature such as summertime is increased. When it exceeds 31 ° C., it becomes a supercritical state.

  The air heat exchanger 42 is disposed at a position separated from the Stirling refrigerator 20 by a predetermined distance. The air heat exchanger 42 has a meandering heat radiation path (flow path) 42a. The heat radiation path 42a is for passage of the heat radiation refrigerant. In such an air heat exchanger 42, when the heat radiation refrigerant passes through the heat radiation path 42a, the high-temperature exhaust heat received by the first heat radiation heat exchanger 41 is radiated to the ambient air. Thereby, ambient air is heated by high temperature exhaust heat. In addition, the air heat exchanger 42 is disposed above the reference height of the high temperature part 22 of the Stirling refrigerator 20. A discharge fan (not shown) is provided at a predetermined location around the air heat exchanger 42. The discharge blower fan is for discharging the air heated by the air heat exchanger 42 to the outside.

  The first line 43 is a pipe line connecting the first heat radiation heat exchanger 41 and the air heat exchanger 42. The first line 43 is for moving the heat-dissipating refrigerant that has received the high-temperature exhaust heat in the first heat-dissipating heat exchanger 41 to the air heat exchanger 42.

  The second line 44 is a pipe line that connects the first heat radiation heat exchanger 41 and the air heat exchanger 42 separately from the first line 43. The second line 44 is for moving the heat radiation refrigerant radiated by the air heat exchanger 42 to the first heat radiation heat exchanger 41. Here, the second line 44 is disposed below the first line 43. This is because the density of the heat dissipating refrigerant passing through the second line 44 is greater than the density of the heat dissipating refrigerant passing through the first line 43.

  In such a first heat radiation system pipe 40a, the high-temperature exhaust heat from the high-temperature part 22 of the Stirling refrigerator 20 is released to the outside as follows. The heat-dissipating refrigerant passing through the flow path of the first heat-dissipating heat exchanger 41 receives the high-temperature exhaust heat generated in the high-temperature portion 22 and moves upward, and then moves to the air heat exchanger 42 through the first line 43. . In the air heat exchanger 42, the heat radiation refrigerant radiates high-temperature exhaust heat to the ambient air of the air heat exchanger 42 while passing through the heat radiation path 42a. That is, the ambient air around the air heat exchanger 42 is heated. The heated air is sent to the outside by driving the discharge fan. By the way, the heat-dissipating refrigerant radiated by the air heat exchanger 42 reaches the first heat-dissipating heat exchanger 41 through the second line 44, and then receives high-temperature exhaust heat again when passing through the flow path. Repeat such a cycle. Here, when the outside air temperature in summer or the like exceeds 31 ° C., carbon dioxide, which is a heat-dissipating refrigerant, circulates in a supercritical state.

  The first heat radiation system pipe 40a is configured such that a heat radiation refrigerant circulates between the first heat radiation heat exchanger 41 and the air heat exchanger 42 through a first line 43 and a second line 44 provided separately. It is called a loop type thermosiphon heat pipe.

  As shown in FIG. 3, the second heat radiating system pipe 40 b is a heat pipe in which a heat radiating refrigerant (working fluid) is enclosed, and the second heat radiating heat exchanger 45 and the heater 46 are The third line 47 and the fourth line 48 are separately connected. Here, for example, carbon dioxide, water, or the like is used as the heat dissipation refrigerant. In the first embodiment, the heat dissipation refrigerant will be described as carbon dioxide.

  The second radiant heat exchanger 45 is disposed in a manner covering the outer peripheral surface of the first radiant heat exchanger 41. More specifically, the second radiant heat exchanger 45 has a cylindrical shape whose diameter is larger than that of the first radiant heat exchanger 41, and a flow path (not shown) through which the radiant refrigerant passes. ) Is formed. The second heat radiating heat exchanger 45 is thermally connected to the high temperature part 22 through the first heat exchanger, and the heat radiating refrigerant in the flow path evaporates due to the high temperature exhaust heat from the high temperature part 22. Or it becomes a supercritical state.

  The heater 46 is made of a heat transfer material, and has a flow path (not shown) through which the heat-dissipating refrigerant passes. The warmer 46 is a pair of left and right disposed at the side edge portion of the opening 11 of the case body 10. If it demonstrates in detail, when the glass door 12 is in a fully-closed state, ie, when the opening part 11 is closed, the warmer 46 will contact with a part of the frame 12a of the glass door 12. Arranged. In such a heater 46, when the heat-dissipating refrigerant passes through the flow path, the high-temperature exhaust heat received by the second heat-dissipating heat exchanger 45 is dissipated to the surroundings. Therefore, when the glass door 12 is in the fully closed state, the heater 46 comes into contact with a part of the frame 12a of the glass door 12, but as described above, the heater 46 and the frame Since the body 12a is composed of a heat transfer material, the glass door 12 is heated as a result of the high-temperature exhaust heat being transferred to the frame body 12a. Further, the heater 46 is disposed above the reference height of the high temperature part 22 of the Stirling refrigerator 20.

  The third line 47 is a pipe line connecting the second radiant heat exchanger 45 and the heater 46. This third line 47 is for moving the heat-dissipating refrigerant that has received the high-temperature exhaust heat by the second heat-dissipating heat exchanger 45 to each heater 46, and is branched in the middle to each heater 46. It is extended toward.

  The fourth line 48 is a pipe line that connects the second radiant heat exchanger 45 and the heater 46 separately from the third line 47. The fourth line 48 is for moving the heat radiating refrigerant radiated by the heater 46 to the second heat radiating heat exchanger 45. Here, the fourth line 48 is disposed below the third line 47. This is because the density of the heat dissipating refrigerant passing through the fourth line 48 is larger than the density of the heat dissipating refrigerant passing through the third line 47.

  In such 2nd thermal radiation system piping 40b, the high temperature exhaust heat from the high temperature part 22 of the Stirling refrigerator 20 is conveyed to the side edge part of the opening part 11 as follows. The high-temperature exhaust heat generated in the high-temperature portion 22 is received by the heat-dissipating refrigerant passing through the flow path of the second heat-dissipating heat exchanger 45 through the first heat-dissipating heat exchanger 41, and then moved upward. It moves to the heater 46 through 47. In the warmer 46, the heat-dissipating refrigerant radiates high-temperature exhaust heat around the warmer 46 while passing through the flow path. Here, when the glass door 12 is in a fully closed state, that is, when the opening 11 is closed, the heating unit comes into contact with a part of the frame 12a of the glass door 12, and the frame The high temperature exhaust heat is transferred to 12a. Thereby, the glass door 12 is heated. By the way, the heat-dissipating refrigerant radiated by the heater 46 reaches the second heat-dissipating heat exchanger 45 through the fourth line 48, and then receives high-temperature exhaust heat again when passing through the flow path, as described above. Repeat the cycle. Here, when the outside air temperature in summer or the like exceeds 31 ° C., carbon dioxide, which is a heat-dissipating refrigerant, circulates in a supercritical state.

  The second heat radiating system pipe 40b circulates the heat radiating refrigerant between the second heat radiating heat exchanger 45 and the heater 46 through the third line 47 and the fourth line 48 which are separately provided. Yes, it is called a loop-type thermosiphon heat pipe.

  In the showcase 1 as described above, the cold heat transport means 30 has a flow channel thermally connected to the low temperature part 21 of the Stirling refrigerator 20 and flows through the flow channel by the cold generated in the low temperature part 21. A condensing heat exchanger 31 for condensing the cooling refrigerant and an evaporating path 32a arranged in such a manner that the merchandise containing box 13 is wound, and the cooling refrigerant flowing through the evaporating path 32a evaporates and the merchandise containing box 13, evaporating heat exchanger 32 that cools the product accommodated in product 13, liquid line 33 for moving cooling refrigerant condensed in condensing heat exchanger 31 to evaporating heat exchanger 32, and evaporating in evaporating heat exchanger 32. And a gas line 34 for moving the cooled cooling refrigerant to the condensation heat exchanger 31, and the cooling refrigerant is circulated between the condensation heat exchanger 31, the liquid line 33, the evaporating heat exchanger 32, and the gas line 34. By letting Since the cold generated in the low temperature part 21 of the Stirling refrigerator 20 is transported to the product storage box 13, the temperature difference between the cold generated in the low temperature part 21 of the Stirling refrigerator 20 and the cold transported to the product storage box 13 is calculated. It can be made extremely low and does not use a fluorocarbon refrigerant. Therefore, it is preferable from the viewpoint of environmental protection, and the cold generated in the low temperature portion 21 of the Stirling refrigerator 20 can be efficiently transported to the commodity storage box 13 to cool the commodity.

  Further, according to the showcase 1, the high-temperature exhaust heat transport means 40 circulates the heat radiation refrigerant between the first heat radiation heat exchanger 41, the first line 43, the air heat exchanger 42, and the second line 44. As a result, the high-temperature exhaust heat generated in the high-temperature portion 22 of the Stirling refrigerator 20 is transported to the outside, so that there is no possibility that the high-temperature exhaust heat stays inside the case body 10 and the operation efficiency of the Stirling refrigerator 20 is improved Can be achieved.

  Furthermore, according to the showcase 1, when the high-temperature exhaust heat transport means 40 is disposed at the side edge portion of the opening 11 of the case body 10 and the glass door 12 is in the fully closed state, the glass door 12 is provided. Since part of the high-temperature exhaust heat generated in the high-temperature part 22 of the Stirling refrigerator 20 is transported to the heater 46 that contacts a part of the frame 12a, the glass door 12 in the fully closed state is heated, Thereby, it can suppress that dew condensation arises in the glass door 12. FIG. Therefore, it is possible to visually recognize the product stored in the product storage box 13 from the outside through the glass door 12.

  The preferred embodiment 1 of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made. For example, in the first embodiment described above, the Stirling refrigerator 20 is placed horizontally, but in the present invention, the Stirling refrigerator 20 is placed vertically as shown in FIGS. 4 and 5. It may be the one placed. In this way, when the Stirling refrigerator 20 is placed vertically, the installation space of the Stirling refrigerator 20 can be reduced, the entire showcase can be downsized, and the product storage box 13 Can be made relatively large.

  Although Embodiment 1 mentioned above demonstrated the case where the high temperature exhaust heat was conveyed to the frame 12a of the glass door 12 using the 2nd thermal radiation system piping 40b, and this glass door 12 was heated, this invention. Then, the high-temperature part of the Stirling refrigerator and the frame of the glass door are thermally connected via a heat transfer wire, and the high-temperature exhaust heat is transported to the frame of the glass door using the heat transfer wire. The door may be heated. According to such a configuration, the glass door can be heated with a very simple configuration.

  The glass door may be a double glass door with an air insulation layer inside. According to such a structure, it can suppress that dew condensation arises in a glass door more reliably.

  Moreover, although Embodiment 1 mentioned above demonstrated the case where the high temperature exhaust heat was conveyed to the frame 12a, and the glass door 12 was heated, in this invention, a high temperature is used for this hot wire using a glass door containing a hot wire. You may make it transport waste heat. Such a configuration can also suppress the occurrence of condensation on the glass door.

  Furthermore, in the first embodiment described above, the evaporative heat exchanger 32 has a configuration in which the single evaporating path 32a winds around the commodity storage box 13. However, in the present invention, the liquid line branches and a plurality of evaporating heat exchangers 32a are evaporated. An evaporative heat exchanger having a configuration in which the path winds around the commodity storage box may be used.

  In the present invention, it is preferable to start the Stirling refrigerator 20 while gradually increasing the voltage applied to the Stirling refrigerator 20. By starting in this way, it is possible to earn time for the cooling refrigerant staying in the evaporation path 32a to return to the condensation heat exchanger 31 when the operation of the Stirling refrigerator 20 is stopped. Can be improved.

<Embodiment 2>
FIG. 6 is a cross-sectional side view schematically showing the showcase according to Embodiment 2 of the present invention. The showcase 2 illustrated here is for selling products such as ice cream, and includes a case body 100. In addition, the same code | symbol is attached | subjected and demonstrated to what has the same structure as the showcase 1 in Embodiment 1 mentioned above.

  The case body 100 is a housing having an opening 11 on the upper surface, and includes a glass door (door body) 12 for opening and closing the opening 11, and a product storage box 13 and a Stirling refrigerator inside. 20, a cold heat transport means 300 and a high temperature exhaust heat transport means 400 are provided.

  The glass door 12 is, for example, a sliding door type. When the glass door 12 is opened, the opening 11 is opened. When the glass door 12 is closed and fully closed, the opening 11 is closed. Is.

  The product storage box 13 is made of a heat transfer material such as a metal material, for example, and is a box having an upper surface opened. The product storage box 13 is disposed in the lower part of the opening 11 inside the case main body 100, and is for storing products. A heat insulating material 14 such as a heat insulating board is laid around the product storage box 13. Thereby, the goods storage box 13 is arrange | positioned inside the case main body 100 in the heat insulated aspect.

  The Stirling refrigerator 20 is placed sideways on the rear side of the opening 11 inside the case body 100 and above the product storage box 13. As shown in FIG. 7, the Stirling refrigerator 20 includes a cylindrical low temperature portion 21 that generates cold heat when driven and a cylindrical high temperature portion 22 that generates high temperature exhaust heat.

  The cold heat transport means 300 transports the cold heat generated in the low temperature part 21 of the Stirling refrigerator 20 to the commodity storage box 13. As shown in FIG. 7, this cold heat transport means 300 is a heat pipe, in which a cooling refrigerant (working fluid) is enclosed, and the condensing heat exchanger 31 and the evaporating heat exchanger 320 are connected to a liquid line. (Transmission channel) 330 and gas line (return channel) 340 are separately connected. Here, as the cooling refrigerant, for example, a gas (such as carbon dioxide) that is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 21 of the Stirling refrigerator 20 (an antifreeze refrigerant) is used.

  The condensing heat exchanger 31 is disposed in such a manner as to cover the side peripheral surface of the low temperature part 21 of the Stirling refrigerator 20. More specifically, the condensation heat exchanger 31 has a cylindrical shape whose diameter is larger than that of the low temperature portion 21 of the Stirling refrigerator 20, and a flow path (not shown) through which the cooling refrigerant passes. ) Is formed. The condensing heat exchanger 31 is thermally connected to the low temperature portion 21, and the cooling refrigerant in the flow path is condensed by the cold heat from the low temperature portion 21.

  The evaporative heat exchanger 320 is provided on the outer surface of the product storage box 13, and more specifically, a plurality of the heat exchangers 320 are provided in such a manner that different regions of the product storage box 13 are wound separately from above to below. It has two evaporation paths (flow paths) 320a and 320b (in the illustrated example). Specifically, one evaporation path 320a is provided in such a manner that the upper area of the product storage box 13 is wound from above to below, and the other evaporation path 320b has the lower area of the product storage box 13 from above. It is provided in such a manner that it is wound downward. Each of the evaporation paths 320a and 320b is for the cooling refrigerant to pass from the upper side to the lower side. In such an evaporative heat exchanger 320, as will be described in detail later, the cooling refrigerant that passes through the evaporation paths 320a and 320b by heat obtained from the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13 is provided. Evaporates to vapor. In other words, the products and the like stored in the product storage box 13 are cooled because heat is taken away as the cooling refrigerant evaporates. Moreover, since the evaporative heat exchanger 320 is provided on the outer surface of the commodity storage box 13, it is disposed below the reference height of the low temperature part 21 of the Stirling refrigerator 20.

  The liquid line 330 is a pipe line connecting the condensation heat exchanger 31 and the evaporation heat exchanger 320. The liquid line 330 is for sending the cooling refrigerant condensed in the condensation heat exchanger 31 from the condensation heat exchanger 31 to the evaporation heat exchanger 320. More specifically, the liquid line 330 branches the cooling refrigerant condensed by the condensation heat exchanger 31 at a branch point 330a provided in the middle, and sends it to the evaporation paths 320a and 320b of the evaporation heat exchanger 320. Is for.

  The gas line 340 is a pipe line that connects the condensation heat exchanger 31 and the evaporation heat exchanger 320 separately from the liquid line 330. The gas line 340 is for returning the cooling refrigerant evaporated in the evaporating heat exchanger 320 from the evaporating heat exchanger 320 to the condensing heat exchanger 31. More specifically, the gas line 340 joins the cooling refrigerant evaporated in each of the evaporation paths 320a and 320b of the evaporation heat exchanger 320 and returns to the condensation heat exchanger 31 at a confluence 340a provided in the middle. Is for.

  In such a cold heat transport means 300, the cold heat from the low temperature part 21 of the Stirling refrigerator 20 is transported to the commodity storage box 13 as follows. The cooling refrigerant (gaseous refrigerant) passing through the flow path of the condensation heat exchanger 31 is cooled and condensed by the cold heat generated from the low temperature part 21, liquefies, and moves downward by the gravity. Thereafter, the cooling refrigerant passes through the liquid line 330, branches at the branch point 330a, and moves to the respective evaporation paths 320a and 320b of the evaporation heat exchanger 320. In the evaporative heat exchanger 320, the cooling refrigerant passes through the respective evaporation paths 320 a and 320 b from the upper side to the lower side, and heats the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13. Evaporates. That is, the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13 are cooled because heat is taken away, so that the cold generated in the low temperature part 21 of the Stirling refrigerator 20 is reduced to the product. It is transported to the storage box 13. By the way, the cooling refrigerant evaporated in the evaporative heat exchanger 320 is merged at the confluence 340a of the gas line 340 to reach the condensation heat exchanger 31, where it is condensed again when passing through the flow path. repeat. As a result, the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13 are cooled to a desired cooling temperature (for example, −20 ° C. or the like).

  In this cold heat transport means 300, a cooling refrigerant circulates between the condensation heat exchanger 31 and the evaporative heat exchanger 320 through a separately provided liquid line 330 and gas line 340. This is called a siphon heat pipe.

  The high-temperature exhaust heat transporting means 400 transports high-temperature exhaust heat generated in the high-temperature part 22 of the Stirling refrigerator 20 to the outside. As shown in FIG. The heat radiation heat exchanger 410 and the air heat exchanger 42 are separately connected by the first line 43 and the second line 44. Here, for example, carbon dioxide, water, or the like is used as the heat radiation refrigerant. In the second embodiment, the heat radiation refrigerant will be described as carbon dioxide.

  The radiant heat exchanger 410 is arranged in such a manner as to cover the side peripheral surface of the high temperature part 22 of the Stirling refrigerator 20. More specifically, the heat radiation heat exchanger 410 has a cylindrical shape whose diameter is larger than that of the high temperature portion 22 of the Stirling refrigerator 20, and a flow path (not shown) through which the heat radiation refrigerant passes. ) Is formed. The heat radiating heat exchanger 410 is thermally connected to the high temperature portion 22, and the heat radiating refrigerant in the flow path evaporates due to the high temperature exhaust heat from the high temperature portion 22, or the outdoor temperature in summer or the like is 31 ° C. If it exceeds, it becomes a supercritical state.

  The air heat exchanger 42 is disposed at a position separated from the Stirling refrigerator 20 by a predetermined distance. This air heat exchanger 42 has a meandering heat radiation path 42a. The heat radiation path 42a is for passage of the heat radiation refrigerant. In such an air heat exchanger 42, the high-temperature exhaust heat received by the heat dissipation heat exchanger 410 is radiated to the surrounding air when the heat dissipation refrigerant passes through the heat dissipation path 42a. Thereby, ambient air is heated by high temperature exhaust heat. In addition, the air heat exchanger 42 is disposed above the reference height of the high temperature part 22 of the Stirling refrigerator 20. A discharge fan (not shown) is provided at a predetermined location around the air heat exchanger 42. The discharge blower fan is for discharging the air heated by the air heat exchanger 42 to the outside.

  The first line 43 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42. The first line 43 is for moving the heat-dissipating refrigerant that has received the high-temperature exhaust heat in the heat-dissipating heat exchanger 410 to the air heat exchanger 42.

  The second line 44 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42 separately from the first line 43. The second line 44 is for moving the heat-dissipating refrigerant radiated by the air heat exchanger 42 to the heat-radiating heat exchanger 410.

  In such a high temperature exhaust heat transport means 400, the high temperature exhaust heat from the high temperature part 22 of the Stirling refrigerator 20 is released to the outside as follows. The heat-dissipating refrigerant passing through the flow path of the heat-dissipating heat exchanger 410 receives the high-temperature exhaust heat generated in the high-temperature portion 22 and moves upward, and then moves to the air heat exchanger 42 through the first line 43. In the air heat exchanger 42, the heat radiation refrigerant radiates high-temperature exhaust heat to the ambient air of the air heat exchanger 42 while passing through the heat radiation path 42a. That is, the ambient air around the air heat exchanger 42 is heated. The heated air is sent to the outside by driving the discharge fan. By the way, the heat-dissipating refrigerant radiated by the air heat exchanger 42 reaches the heat-dissipating heat exchanger 410 through the second line 44, and then receives high-temperature exhaust heat again when passing through the flow path. Repeat cycle. Here, when the outside air temperature in summer or the like exceeds 31 ° C., carbon dioxide, which is a heat-dissipating refrigerant, circulates in a supercritical state.

  In the high-temperature exhaust heat transport means 400, the heat radiation refrigerant circulates between the heat radiation heat exchanger 410 and the air heat exchanger 42 through the first line 43 and the second line 44 provided separately. This is called a loop type thermosiphon heat pipe.

  In the showcase 2 as described above, the cold heat transport means 300 has a flow channel thermally connected to the low temperature part 21 of the Stirling refrigerator 20 and flows through the flow path by the cold generated in the low temperature part 21. A condensing heat exchanger 31 for condensing the cooling refrigerant, and a plurality of evaporation paths 320a and 320b that are separately wound around different regions of the product storage box 13, each of the evaporation paths 320a, The evaporative heat exchanger 320 that cools the product stored in the product storage box 13 by evaporating the cooling refrigerant flowing through 320 b and the cooling refrigerant condensed in the condensation heat exchanger 31 are branched to the evaporative heat exchanger 320. A liquid line 330 for moving, and a gas line 340 for merging the cooling refrigerant evaporated in the evaporative heat exchanger 320 and moving it to the condensation heat exchanger 31, and condensing the cooling refrigerant. By circulating between the heat exchanger 31, the liquid line 330, the evaporating heat exchanger 320, and the gas line 340, the cold heat generated in the low temperature portion 21 of the Stirling refrigerator 20 is transported to the commodity storage box 13, so the Stirling refrigerator The temperature difference between the cold heat generated in the low temperature portion 21 of 20 and the cold heat transported to the commodity storage box 13 can be made extremely low, and no chlorofluorocarbon refrigerant is used. Therefore, it is preferable from the viewpoint of environmental protection, and the cold generated in the low temperature portion 21 of the Stirling refrigerator 20 can be efficiently transported to the commodity storage box 13 to cool the commodity.

  In particular, according to the showcase 2 in the second embodiment, the plurality of evaporation paths 320a and 320b constituting the evaporation heat exchanger 320 are separately wound around different regions (upper and lower regions) of the product storage box 13. Since it is arranged in a rotating manner, heat can be exchanged with the cooling refrigerant that passes through the evaporation paths 320a and 320b in each region. Can be cooled, and the inside of the product storage box 13 can be set to a different temperature zone for each region. Therefore, it becomes possible to cope with cooling of various products.

  Further, according to the showcase 2, the cooling refrigerant passes through the respective evaporation paths 320a and 320b of the evaporating heat exchanger 320 from the upper side to the lower side. The upper part of the region is passed first, and as a result, the upper region of the commodity storage box 13 having the largest amount of intrusion heat due to the influence of the opening 11 and the like can be cooled well. Further, during the operation of the Stirling refrigerator 20 (when a certain time has elapsed since the start of the Stirling refrigerator 20), each of the commodity storage boxes 13 in which the cooling refrigerant passing through the respective evaporation paths 320a and 320b has the largest amount of intrusion heat. After exchanging heat in the upper part of the region, heat exchange is performed in the lower part of each region of the product storage box 13, so that the cooling refrigerant can be relatively easily vaporized in the evaporation paths 320 a and 320 b. Can be circulated well.

  Furthermore, according to the showcase 2, the high-temperature exhaust heat transporting means 400 circulates the heat radiation refrigerant between the heat radiation heat exchanger 410, the first line 43, the air heat exchanger 42, and the second line 44. Since the high-temperature exhaust heat generated in the high-temperature portion 22 of the Stirling refrigerator 20 is transported to the outside, there is no possibility that the high-temperature exhaust heat stays inside the case body 100, and the operation efficiency of the Stirling refrigerator 20 is improved. be able to.

<Embodiment 3>
FIG. 8 and FIG. 9 show the showcase in Embodiment 3 of the present invention in a simplified manner, FIG. 8 is a front view, and FIG. 9 is a cross-sectional side view. The showcase 3 illustrated here is for selling products such as ice cream, and includes a case main body 101. In addition, the same code | symbol is attached | subjected and demonstrated to what has the same structure as the showcase 1 in Embodiment 1 mentioned above.

  The case main body 101 is a housing having an opening 11 on the upper surface, and includes a glass door (door body) 12 for opening and closing the opening 11, and product storage boxes 13 a and 13 b and Stirling inside. A refrigerator 20, a cold heat transport means 301 and a high temperature exhaust heat transport means 400 are provided.

  The glass door 12 is, for example, a sliding door type. When the glass door 12 is opened, the opening 11 is opened. When the glass door 12 is closed and fully closed, the opening 11 is closed. Is.

  The product storage boxes 13a and 13b are made of a heat transfer material such as a metal material, for example, and are box bodies whose upper surfaces are open. Here, a plurality (two in the illustrated example) of product storage boxes 13a and 13b are provided. These merchandise storage boxes 13a and 13b are both arranged in a side-by-side manner in the lower region of the opening 11 inside the case main body 101, and are for storing merchandise. A heat insulating material 14 such as a heat insulating board is laid around each of the product storage boxes 13a and 13b. Thereby, each goods storage box 13a, 13b is arrange | positioned inside the case main body 101 in the heat insulated aspect.

  The Stirling refrigerator 20 is placed horizontally in the rear region of the opening 11 inside the case body 101 and above the product storage boxes 13a and 13b. As shown in FIG. 10, the Stirling refrigerator 20 includes a cylindrical low-temperature part 21 that generates cold heat when driven and a cylindrical high-temperature part 22 that generates high-temperature exhaust heat.

  The cold heat transport means 301 transports the cold heat generated in the low temperature part 21 of the Stirling refrigerator 20 to the product storage boxes 13a and 13b. As shown in FIG. 10, this cold heat transport means 301 is a heat pipe in which a cooling refrigerant (working fluid) is enclosed, and the condensing heat exchanger 31 and the evaporating heat exchanger 321 are connected to a liquid line. (Supply channel) 331 and gas line (return channel) 341 are separately connected. Here, as the cooling refrigerant, for example, a gas (such as carbon dioxide) that is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 21 of the Stirling refrigerator 20 (an antifreeze refrigerant) is used.

  The condensing heat exchanger 31 is disposed in such a manner as to cover the side peripheral surface of the low temperature part 21 of the Stirling refrigerator 20. More specifically, the condensation heat exchanger 31 has a cylindrical shape whose diameter is larger than that of the low temperature portion 21 of the Stirling refrigerator 20, and a flow path (not shown) through which the cooling refrigerant passes. ) Is formed. The condensing heat exchanger 31 is thermally connected to the low temperature portion 21, and the cooling refrigerant in the flow path is condensed by the cold heat from the low temperature portion 21.

  The evaporative heat exchanger 321 is provided on the outer surface of the product storage boxes 13a and 13b. More specifically, the plurality of product storage boxes 13a and 13b are provided in such a manner that the product storage boxes 13a and 13b are wound from above to below. It has two evaporation paths (flow paths) 321a and 321b (in the illustrated example). Specifically, one evaporation path 321a is provided in such a manner that one product storage box 13a is wound downward from above, and the other evaporation path 321b has the other product storage box 13b downward from above. It is provided in such a manner that it is wound toward. Each of the evaporation paths 321a and 321b is for passage of the cooling refrigerant from the upper side to the lower side. In such an evaporative heat exchanger 321, the details will be described later, but the evaporating paths 321 a and 321 b are passed by the heat obtained from the products stored in the product storage boxes 13 a and 13 b and the internal atmosphere of the product storage boxes 13 a and 13 b. The cooling refrigerant evaporates to vapor. In other words, the products and the like stored in the product storage boxes 13a and 13b are cooled because heat is taken away as the cooling refrigerant evaporates. Moreover, since the evaporative heat exchanger 321 is provided on the outer surface of the commodity storage boxes 13 a and 13 b, it is disposed below the reference height of the low temperature part 21 of the Stirling refrigerator 20.

  The liquid line 331 is a pipe line that connects the condensation heat exchanger 31 and the evaporating heat exchanger 321. The liquid line 331 is for sending the cooling refrigerant condensed in the condensation heat exchanger 31 from the condensation heat exchanger 31 to the evaporating heat exchanger 321. More specifically, the liquid line 331 branches the cooling refrigerant condensed in the condensation heat exchanger 31 at a branch point 331a provided in the middle and sends it to the respective evaporation paths 321a and 321b of the evaporation heat exchanger 321. Is for.

  In each liquid line 331, electromagnetic valves 331b and 331c are provided at locations downstream of the branch point 331a. The electromagnetic valves 331b and 331c are individually opened and closed when a command is given from a control unit (not shown). More specifically, the electromagnetic valves 331b and 331c allow the cooling refrigerant condensed by the condensation heat exchanger 31 to move when the solenoid valves 331b and 331c are opened, while the condensation heat exchanger 31 when the solenoid valves 331b and 331c are closed. This is for restricting the movement of the cooling refrigerant condensed in (1).

  The gas line 341 is a pipe line that connects the condensation heat exchanger 31 and the evaporation heat exchanger 321 separately from the liquid line 331. The gas line 341 is for returning the cooling refrigerant evaporated in the evaporating heat exchanger 321 from the evaporating heat exchanger 321 to the condensing heat exchanger 31. More specifically, the gas line 341 joins the cooling refrigerant evaporated in each of the evaporation paths 321a and 321b of the evaporation heat exchanger 321 and returns to the condensation heat exchanger 31 at a confluence 341a provided in the middle. Is for.

  The cold heat transporting means 301 is configured such that a cooling refrigerant circulates between the condensation heat exchanger 31 and the evaporating heat exchanger 321 through a liquid line 331 and a gas line 341 provided separately, and a loop-type thermostat. This is called a siphon heat pipe.

  The high-temperature exhaust heat transport means 400 is for transporting high-temperature exhaust heat generated in the high-temperature part 22 of the Stirling refrigerator 20 to the outside. As shown in FIG. The heat radiation heat exchanger 410 and the air heat exchanger 42 are separately connected by the first line 43 and the second line 44. Here, for example, carbon dioxide, water, or the like is used as the heat radiation refrigerant. In the third embodiment, the heat radiation refrigerant will be described as carbon dioxide.

  The radiant heat exchanger 410 is arranged in such a manner as to cover the side peripheral surface of the high temperature part 22 of the Stirling refrigerator 20. More specifically, the heat radiation heat exchanger 410 has a cylindrical shape whose diameter is larger than that of the high temperature portion 22 of the Stirling refrigerator 20, and a flow path (not shown) through which the heat radiation refrigerant passes. ) Is formed. The heat radiating heat exchanger 410 is thermally connected to the high temperature portion 22, and the heat radiating refrigerant in the flow path evaporates due to the high temperature exhaust heat from the high temperature portion 22, or the outdoor temperature in summer or the like is 31 ° C. If it exceeds, it becomes a supercritical state.

  The air heat exchanger 42 is disposed at a position separated from the Stirling refrigerator 20 by a predetermined distance. This air heat exchanger 42 has a meandering heat radiation path 42a. The heat radiation path 42a is for passage of the heat radiation refrigerant. In such an air heat exchanger 42, the high-temperature exhaust heat received by the heat dissipation heat exchanger 410 is radiated to the surrounding air when the heat dissipation refrigerant passes through the heat dissipation path 42a. Thereby, ambient air is heated by high temperature exhaust heat. In addition, the air heat exchanger 42 is disposed above the reference height of the high temperature part 22 of the Stirling refrigerator 20. A discharge fan (not shown) is provided at a predetermined location around the air heat exchanger 42. The discharge blower fan is for discharging the air heated by the air heat exchanger 42 to the outside.

  The first line 43 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42. The first line 43 is for moving the heat-dissipating refrigerant that has received the high-temperature exhaust heat in the heat-dissipating heat exchanger 410 to the air heat exchanger 42.

  The second line 44 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42 separately from the first line 43. The second line 44 is for moving the heat-dissipating refrigerant radiated by the air heat exchanger 42 to the heat-radiating heat exchanger 410.

  In such a high temperature exhaust heat transport means 400, the high temperature exhaust heat from the high temperature part 22 of the Stirling refrigerator 20 is released to the outside as follows. The heat-dissipating refrigerant passing through the flow path of the heat-dissipating heat exchanger 410 receives the high-temperature exhaust heat generated in the high-temperature portion 22 and moves upward, and then moves to the air heat exchanger 42 through the first line 43. In the air heat exchanger 42, the heat radiation refrigerant radiates high-temperature exhaust heat to the ambient air of the air heat exchanger 42 while passing through the heat radiation path 42a. That is, the ambient air around the air heat exchanger 42 is heated. The heated air is sent to the outside by driving the discharge fan. By the way, the heat-dissipating refrigerant radiated by the air heat exchanger 42 reaches the heat-dissipating heat exchanger 410 through the second line 44, and then receives high-temperature exhaust heat again when passing through the flow path. Repeat cycle. Here, when the outside air temperature in summer or the like exceeds 31 ° C., carbon dioxide, which is a refrigerant for heat dissipation, circulates in a supercritical state.

  In the high-temperature exhaust heat transport means 400, the heat radiation refrigerant circulates between the heat radiation heat exchanger 410 and the air heat exchanger 42 through the first line 43 and the second line 44 provided separately. This is called a loop type thermosiphon heat pipe.

  In the showcase 3 as described above, the cold heat from the low temperature part 21 of the Stirling refrigerator 20 is transported to the commodity storage boxes 13a and 13b through the cold heat transport means 301 as follows. Here, the solenoid valves 331b and 331c are both opened to allow the cooling refrigerant to move.

  The cooling refrigerant (gaseous refrigerant) passing through the flow path of the condensation heat exchanger 31 is cooled and condensed by the cold heat generated from the low temperature part 21, liquefies, and moves downward by the gravity. Thereafter, the cooling refrigerant passes through the liquid line 331, branches at the branch point 331a, and moves to the respective evaporation paths 321a and 321b of the evaporation heat exchanger 321. In this evaporative heat exchanger 321, the cooling refrigerant passes through the respective evaporation paths 321 a and 321 b from the upper side to the lower side, while the products stored in the product storage boxes 13 a and 13 b and the product storage boxes 13 a and 13 b. Evaporates due to the heat of the internal atmosphere. In other words, the products stored in the product storage boxes 13a and 13b and the internal atmosphere of the product storage boxes 13a and 13b are cooled due to heat being removed, and thus are generated in the low temperature portion 21 of the Stirling refrigerator 20. The cooled heat is transported to the product storage boxes 13a and 13b. By the way, the cooling refrigerant evaporated in the evaporating heat exchanger 321 is merged at the confluence 341a of the gas line 341 to reach the condensing heat exchanger 31, where it is condensed again when passing through the flow path. repeat. Thereby, the product accommodated in the product storage boxes 13a and 13b and the internal atmosphere of the product storage boxes 13a and 13b are cooled to a desired cooling temperature (for example, −20 ° C. or the like).

  On the other hand, when one electromagnetic valve 331b closes and restricts the movement of the cooling refrigerant, the cooling refrigerant does not pass downstream of the electromagnetic valve 331b. Therefore, heat exchange between the cooling refrigerant and the internal atmosphere of the product storage box 13a is not performed in the evaporation path 321a on the downstream side of the electromagnetic valve 331b. Therefore, when it is not necessary to cool the internal atmosphere of the one product storage box 13a due to circumstances such as the temperature of the internal atmosphere of the one product storage box 13a being extremely low, it is disposed in the product storage box 13a. The solenoid valve 331b on the upstream side of the evaporation path 321a is closed by a command from the main control unit, thereby restricting the passage of the cooling refrigerant through the evaporation path 321a.

  As described above, according to the showcase 3 in Embodiment 3 of the present invention, the cold heat transport means 301 has a flow path thermally connected to the low temperature part 21 of the Stirling refrigerator 20, and the low temperature part 21 Condensation heat exchanger 31 that condenses the cooling refrigerant flowing through the flow path by the generated cold heat and a plurality of product storage boxes 13a and 13b arranged inside case body 101 are arranged in a manner of winding separately. An evaporation heat exchanger 321 that has a plurality of evaporation paths 321a and 321b, evaporates the cooling refrigerant flowing through the respective evaporation paths 321a and 321b, and cools the products stored in the product storage boxes 13a and 13b; A liquid line 331 for branching the cooling refrigerant condensed in the exchanger 31 and moving it to the evaporating heat exchanger 321 and the cooling refrigerant evaporated in the evaporating heat exchanger 321 are merged to condense the heat exchanger 3. A low-temperature portion of the Stirling refrigerator 20 by circulating the cooling refrigerant between the condensation heat exchanger 31, the liquid line 331, the evaporation heat exchanger 321 and the gas line 341. Since the cold heat generated at 21 is transported to the product storage boxes 13a and 13b, the temperature difference between the cool heat generated at the low temperature section 21 of the Stirling refrigerator 20 and the cool heat transported to the product storage boxes 13a and 13b is extremely low. In addition, no fluorocarbon refrigerant is used. Therefore, it is preferable from the viewpoint of environmental protection, and the cold generated in the low temperature part 21 of the Stirling refrigerator 20 can be efficiently transported to the product storage boxes 13a and 13b to cool the product.

  In particular, according to the showcase 3, the plurality of evaporation paths 321a and 321b constituting the evaporative heat exchanger 321 are separately arranged in such a manner that the product storage boxes 13a and 13b are wound separately. 13a and 13b can exchange heat with the cooling refrigerant passing through the evaporation paths 321a and 321b, thereby enabling the product to be individually and freely cooled for each of the product storage boxes 13a and 13b. It becomes possible to set the inside of the boxes 13a and 13b to different temperature zones. Therefore, it becomes possible to cope with cooling of various products.

  Further, according to the showcase 3, the solenoid valves 331b and 331c can be opened and closed to restrict the movement of the cooling refrigerant, thereby finely controlling the temperatures of the product storage boxes 13a and 13b. As a result, it becomes possible to cope with cooling of various products.

  Further, according to the showcase 3, since the cooling refrigerant passes through the respective evaporation paths 321a and 321b of the evaporating heat exchanger 321 from the upper side to the lower side, the cooling refrigerant is supplied to each commodity storage box 13a, As a result, the upper region of each of the product storage boxes 13a and 13b having the largest amount of intrusion heat can be satisfactorily cooled. Further, during operation of the Stirling refrigerator 20 (when a certain period of time has elapsed since the start of the Stirling refrigerator 20), the cooling medium that passes through the respective evaporation paths 321a and 321b has the largest amount of intrusion heat. After exchanging heat in the upper region of 13b, heat exchange is performed in the lower region of each product storage box 13a, 13b, so that the cooling refrigerant can be vaporized relatively easily in the evaporation paths 321a, 321b. Can be circulated well.

  Further, according to the showcase 3, the high-temperature exhaust heat transporting means 400 circulates the heat-dissipating refrigerant between the heat-dissipating heat exchanger 410, the first line 43, the air heat exchanger 42, and the second line 44. Since the high-temperature exhaust heat generated in the high-temperature portion 22 of the Stirling refrigerator 20 is transported to the outside, there is no possibility that the high-temperature exhaust heat stays inside the case body 101, and the operation efficiency of the Stirling refrigerator 20 is improved. be able to.

  Although the third embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. For example, as shown in FIG. 11, the electromagnetic valves 331b and 331c need not be provided. Even in such a configuration, the plurality of evaporation paths 321a and 321b constituting the evaporation heat exchanger 321 are separately arranged in such a manner that the product storage boxes 13a and 13b are wound respectively. Heat can be exchanged with the cooling refrigerant passing through the evaporation paths 321a and 321b, thereby enabling the product to be individually cooled for each of the product storage boxes 13a and 13b. It becomes possible to set the inside of 13b to a different temperature zone. Therefore, it becomes possible to cope with cooling of various products.

  In addition, as shown in FIG. 12, each gas line 341 may be provided with electromagnetic valves 341b and 341c at locations upstream of the junction 341a. Even in such a configuration, the electromagnetic valves 341b and 341c can be opened and closed to restrict the movement of the cooling refrigerant, thereby enabling fine control of the temperatures of the product storage boxes 13a and 13b. As a result, it becomes possible to cope with cooling of various products.

<Embodiment 4>
FIG. 13 is a cross-sectional side view schematically showing a showcase according to Embodiment 4 of the present invention. The showcase 4 exemplified here is for selling products such as ice cream, and includes a case main body 102. In addition, the same code | symbol is attached | subjected and demonstrated to what has the same structure as the showcase 1 in Embodiment 1 mentioned above.

  The case main body 102 is a housing having an opening 11 on the upper surface, and includes a glass door (door body) 12 for opening and closing the opening 11, and a product storage box 13 and a Stirling refrigerator inside. 20, a cold heat transport means 302 and a high temperature exhaust heat transport means 400 are provided.

  The glass door 12 is, for example, a sliding door type. When the glass door 12 is opened, the opening 11 is opened. When the glass door 12 is closed and fully closed, the opening 11 is closed. Is.

  The product storage box 13 is made of a heat transfer material such as a metal material, for example, and is a box having an upper surface opened. The product storage box 13 is disposed in the lower region of the opening 11 inside the case main body 102, and is for storing products. A heat insulating material 14 such as a heat insulating board is laid around the product storage box 13. Thereby, the goods storage box 13 is arrange | positioned inside the case main body 102 in the heat insulated aspect.

  The Stirling refrigerator 20 is placed horizontally on the rear side of the opening 11 inside the case main body 102 and above the commodity storage box 13. As shown in FIG. 7, the Stirling refrigerator 20 includes a cylindrical low temperature portion 21 that generates cold heat when driven and a cylindrical high temperature portion 22 that generates high temperature exhaust heat.

  The cold heat transport means 302 is for transporting cold heat generated in the low temperature part 21 of the Stirling refrigerator 20 to the commodity storage box 13 and includes a first cold heat transport pipe 302a and a second cold heat transport pipe 302b. is there. As shown in FIG. 14, the first cold heat transport pipe 302a is a heat pipe in which a cooling refrigerant (working fluid) is enclosed, and the condensing heat exchanger 31 and the evaporating heat exchanger 322 are connected to a liquid. A line (delivery flow path) 332 and a gas line (return flow path) 342 are separately connected. Here, as the cooling refrigerant, for example, a gas (such as carbon dioxide) that is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 21 of the Stirling refrigerator 20 (an antifreeze refrigerant) is used.

  The condensing heat exchanger 31 is disposed in such a manner as to cover the side peripheral surface of the low temperature part 21 of the Stirling refrigerator 20. More specifically, the condensation heat exchanger 31 has a cylindrical shape whose diameter is larger than that of the low temperature portion 21 of the Stirling refrigerator 20, and a flow path (not shown) through which the cooling refrigerant passes. ) Is formed. The condensing heat exchanger 31 is thermally connected to the low temperature portion 21, and the cooling refrigerant in the flow path is condensed by the cold heat from the low temperature portion 21.

  The evaporative heat exchanger 322 is provided on the outer surface of the product storage box 13, and more specifically, the evaporation path (flow) provided in such a manner that the lower region of the product storage box 13 is wound from above to below. Road) 322a. This evaporation path 322a is for the cooling refrigerant to pass from the top to the bottom. In such an evaporative heat exchanger 322, as will be described in detail later, the cooling refrigerant passing through the evaporating path 322a is evaporated by heat obtained from the product stored in the product storage box 13 and the atmosphere inside the product storage box 13. Become steam. In other words, the products and the like stored in the product storage box 13 are cooled because heat is taken away as the cooling refrigerant evaporates. Moreover, since the evaporative heat exchanger 322 is provided on the outer surface of the commodity storage box 13, the evaporative heat exchanger 322 is disposed below the reference height of the low temperature part 21 of the Stirling refrigerator 20.

  The liquid line 332 is a pipe line that connects the condensation heat exchanger 31 and the evaporation heat exchanger 322. The liquid line 332 is for sending the cooling refrigerant condensed in the condensation heat exchanger 31 from the condensation heat exchanger 31 to the evaporating heat exchanger 322.

  The gas line 342 is a pipe line that connects the condensation heat exchanger 31 and the evaporating heat exchanger 322 separately from the liquid line 332. The gas line 342 is for returning the cooling refrigerant evaporated in the evaporating heat exchanger 322 from the evaporating heat exchanger 322 to the condensing heat exchanger 31.

  In such 1st cold heat transport piping 302a, the cold heat from the low temperature part 21 of the Stirling refrigerator 20 is conveyed to the goods storage box 13 as follows. The cooling refrigerant (gaseous refrigerant) passing through the flow path of the condensation heat exchanger 31 is cooled and condensed by the cold heat generated from the low temperature part 21, liquefies, and moves downward by the gravity. Thereafter, the cooling refrigerant passes through the liquid line 332 and moves to the evaporation path 322 a of the evaporation heat exchanger 322. In the evaporative heat exchanger 322, the cooling refrigerant passes through the evaporation path 322a from the upper side to the lower side, while the product stored in the lower region of the product storage box 13 and the heat of the internal atmosphere of the product storage box 13 Evaporates. That is, the product stored in the lower region of the product storage box 13 and the internal atmosphere of the product storage box 13 are cooled because heat is taken away, and thus generated in the low temperature portion 21 of the Stirling refrigerator 20. The cold heat is transported to the commodity storage box 13. By the way, the cooling refrigerant evaporated in the evaporating heat exchanger 322 reaches the condensing heat exchanger 31 through the gas line 342, is condensed again when passing through the flow path, and repeats the above-described cycle.

  The first cold transport pipe 302a is configured such that the cooling refrigerant circulates between the condensation heat exchanger 31 and the evaporative heat exchanger 322 through the separately provided liquid line 332 and gas line 342. This is called a type thermosiphon heat pipe.

  As shown in FIG. 14, the second cold heat transport pipe 302b is a heat pipe, in which a cooling refrigerant (working fluid) is enclosed, and the first heat exchanger 350 and the second heat exchanger 360 are connected to each other. The transmission line 370 and the feedback line 380 are separately connected. Here, as the cooling refrigerant, for example, a gas (such as carbon dioxide) that is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 21 of the Stirling refrigerator 20 (an antifreeze refrigerant) is used.

  The first heat exchanger 350 is provided in the middle of the liquid line 332 constituting the first cold transport pipe 302a, and has a flow path 350a that is thermally connected to the liquid line 332. The first heat exchanger 350 exchanges heat between the cooling refrigerant flowing through the flow path 350a and the cooling refrigerant passing through the liquid line 332. Thereby, the cooling refrigerant flowing through the flow path 350a receives a part of the cold generated in the low temperature part 21 of the Stirling refrigerator 20 from the cooling refrigerant passing through the liquid line 332.

  The second heat exchanger 360 is provided on the outer surface of the product storage box 13. More specifically, the second heat exchanger 360 is a region different from the region where the evaporation path 322 a of the evaporation heat exchanger 322 is wound, that is, the product storage box 13. The flow path 360a is provided in such a manner that the upper region is wound from above to below. This flow path 360a is for the cooling refrigerant to pass from the top to the bottom. In such a second heat exchanger 360, the details will be described later, but for cooling that passes through the flow path 360 a by heat obtained from the product stored in the upper region of the product storage box 13 and the internal atmosphere of the product storage box 13. The refrigerant evaporates into vapor. In other words, the products and the like stored in the product storage box 13 are cooled because heat is taken away as the cooling refrigerant evaporates.

  The delivery line 370 is a pipe line that connects the first heat exchanger 350 and the second heat exchanger 360. The delivery line 370 is for delivering the cooling refrigerant received by the first heat exchanger 350 from the first heat exchanger 350 to the second heat exchanger 360.

  The return line 380 is a pipe line that connects the first heat exchanger 350 and the second heat exchanger 360 separately from the delivery line 370. The return line 380 is for returning the cooling refrigerant evaporated in the second heat exchanger 360 from the second heat exchanger 360 to the first heat exchanger 350.

  In such 2nd cold heat transport piping 302b, a part of cold heat from the low temperature part 21 of the Stirling refrigerator 20 is conveyed to the goods storage box 13 as follows. The cooling refrigerant that passes through the flow path 350a of the first heat exchanger 350 exchanges heat with the cooling refrigerant that passes through the liquid line 332, and the cooling heat obtained by condensing the cooling refrigerant in the condensation heat exchanger 31. Part of the heat is received. Thereafter, the cooling refrigerant passes through the delivery line 370 and moves to the flow path 360a of the second heat exchanger 360. In the second heat exchanger 360, the cooling refrigerant passes through the flow path 360 a from the upper side to the lower side, while the product stored in the upper region of the product storage box 13 and the internal atmosphere of the product storage box 13. Evaporates with heat. That is, the product accommodated in the upper region of the product storage box 13 and the internal atmosphere of the product storage box 13 are cooled by taking heat away, and thus generated in the low temperature portion 21 of the Stirling refrigerator 20. A part of the cold heat is transported to the commodity storage box 13. By the way, the cooling refrigerant evaporated in the second heat exchanger 360 reaches the first heat exchanger 350 through the feedback line 380, receives heat again when passing through the flow path 350a, and repeats the above-described cycle. As a result, the product stored in the product storage box 13 and the internal atmosphere of the product storage box 13 are cooled to a desired cooling temperature (for example, −20 ° C., etc.) in combination with the action of the first cold transport pipe 302a. Is done.

  In the second cold heat transport pipe 302b, the cooling refrigerant circulates between the first heat exchanger 350 and the second heat exchanger 360 through the separately provided delivery line 370 and return line 380. This is called a loop type thermosiphon heat pipe.

  The high-temperature exhaust heat transporting means 400 transports high-temperature exhaust heat generated in the high-temperature part 22 of the Stirling refrigerator 20 to the outside. As shown in FIG. The heat radiation heat exchanger 410 and the air heat exchanger 42 are separately connected by the first line 43 and the second line 44. Here, for example, carbon dioxide, water, or the like is used as the heat radiation refrigerant. In the fourth embodiment, the heat radiation refrigerant will be described as carbon dioxide.

  The radiant heat exchanger 410 is arranged in such a manner as to cover the side peripheral surface of the high temperature part 22 of the Stirling refrigerator 20. More specifically, the heat radiation heat exchanger 410 has a cylindrical shape whose diameter is larger than that of the high temperature portion 22 of the Stirling refrigerator 20, and a flow path (not shown) through which the heat radiation refrigerant passes. ) Is formed. The heat radiating heat exchanger 410 is thermally connected to the high temperature portion 22, and the heat radiating refrigerant in the flow path evaporates due to the high temperature exhaust heat from the high temperature portion 22, or the outdoor temperature in summer or the like is 31 ° C. If it exceeds, it becomes a supercritical state.

  The air heat exchanger 42 is disposed at a position separated from the Stirling refrigerator 20 by a predetermined distance. This air heat exchanger 42 has a meandering heat radiation path 42a. The heat radiation path 42a is for passage of the heat radiation refrigerant. In such an air heat exchanger 42, the high-temperature exhaust heat received by the heat dissipation heat exchanger 410 is radiated to the surrounding air when the heat dissipation refrigerant passes through the heat dissipation path 42a. Thereby, ambient air is heated by high temperature exhaust heat. In addition, the air heat exchanger 42 is disposed above the reference height of the high temperature part 22 of the Stirling refrigerator 20. A discharge fan (not shown) is provided at a predetermined location around the air heat exchanger 42. The discharge blower fan is for discharging the air heated by the air heat exchanger 42 to the outside.

  The first line 43 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42. The first line 43 is for moving the heat-dissipating refrigerant that has received the high-temperature exhaust heat in the heat-dissipating heat exchanger 410 to the air heat exchanger 42.

  The second line 44 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42 separately from the first line 43. The second line 44 is for moving the heat-dissipating refrigerant radiated by the air heat exchanger 42 to the heat-radiating heat exchanger 410.

  In such a high temperature exhaust heat transport means 400, the high temperature exhaust heat from the high temperature part 22 of the Stirling refrigerator 20 is released to the outside as follows. The heat-dissipating refrigerant passing through the flow path of the heat-dissipating heat exchanger 410 receives the high-temperature exhaust heat generated in the high-temperature portion 22 and moves upward, and then moves to the air heat exchanger 42 through the first line 43. In the air heat exchanger 42, the heat radiation refrigerant radiates high-temperature exhaust heat to the ambient air of the air heat exchanger 42 while passing through the heat radiation path 42a. That is, the ambient air around the air heat exchanger 42 is heated. The heated air is sent to the outside by driving the discharge fan. By the way, the heat-dissipating refrigerant radiated by the air heat exchanger 42 reaches the heat-dissipating heat exchanger 410 through the second line 44, and then receives high-temperature exhaust heat again when passing through the flow path. Repeat cycle. Here, when the outside air temperature in summer or the like exceeds 31 ° C., carbon dioxide, which is a heat-dissipating refrigerant, circulates in a supercritical state.

  In the high-temperature exhaust heat transport means 400, the heat radiation refrigerant circulates between the heat radiation heat exchanger 410 and the air heat exchanger 42 through the first line 43 and the second line 44 provided separately. This is called a loop type thermosiphon heat pipe.

  In the showcase 4 as described above, the first cold transport pipe 302 a (cold heat transport means 302) has a flow channel that is thermally connected to the low temperature part 21 of the Stirling refrigerator 20. Condensation heat exchanger 31 for condensing the cooling refrigerant flowing through the flow path by the generated cold heat, and evaporation path 322a arranged in a manner of winding the lower region of the product storage box 13, the evaporation path 322a The evaporative heat exchanger 322 that cools the product stored in the product storage box 13 by evaporating the flowing cooling refrigerant, and the liquid for moving the cooling refrigerant condensed in the condensation heat exchanger 31 to the evaporative heat exchanger 322 Line 332 and a gas line 342 for moving the cooling refrigerant evaporated in the evaporative heat exchanger 322 to the condensation heat exchanger 31, and the cooling refrigerant is used in the condensation heat exchanger 31, the liquid line 332, and the evaporation heat. By circulating between the exchanger 322 and the gas line 342, the cold generated in the low temperature part 21 of the Stirling refrigerator 20 is transported to the commodity storage box 13, and the second cold transport pipe 302b (cold transport means 302) is liquid. A first heat exchanger 350 having a flow path 350a thermally connected to the line 332 and exchanging heat between the cooling refrigerant flowing through the flow path 350a and the cooling refrigerant passing through the liquid line 332; A flow path 360a is provided in a manner wound around the upper region of the product storage box 13, and the cooling refrigerant flowing through the flow path 360a evaporates to cool the product stored in the product storage box 13. The second heat exchanger 360, the delivery line 370 for moving the cooling refrigerant received by the first heat exchanger 350 to the second heat exchanger 360, and the cooling refrigerant evaporated by the second heat exchanger 360. 1 And a return line 380 for moving to the exchanger 350, and the cooling refrigerant is circulated among the first heat exchanger 350, the delivery line 370, the second heat exchanger 360, and the return line 380, thereby Stirling refrigeration. Since a part of the cold generated in the low temperature part 21 of the machine 20 is transported to the product storage box 13, the temperature difference between the cold generated in the low temperature part 21 of the Stirling refrigerator 20 and the cold transported to the product storage box 13. Can be made extremely low, and a fluorocarbon refrigerant is not used. Therefore, it is preferable from the viewpoint of environmental protection, and the cold generated in the low temperature portion 21 of the Stirling refrigerator 20 can be efficiently transported to the commodity storage box 13 to cool the commodity.

  In particular, according to the showcase 4 in Embodiment 4 of the present invention, evaporation occurs in different regions (upper region and lower region) of one commodity storage box 13 through the first cold transport pipe 302a and the second cold transport pipe 302b. Heat can be exchanged with the cooling refrigerant that passes through the path 322a and the flow path 360a, thereby enabling the product to be individually and freely cooled in different regions of the single product storage box 13, and the product storage box. It becomes possible to set the inside of 13 to a different temperature zone for each region. Therefore, it becomes possible to cope with cooling of various products.

  Further, according to the showcase 4, the cooling refrigerant passes through the evaporation path 322a of the evaporation heat exchanger 322 from the upper side to the lower side, while the cooling refrigerant passes through the flow path 360a of the second heat exchanger 360. The cooling refrigerant passes through the upper part of each region of the product storage box 13 first, and as a result, the most intrusion heat amount is affected by the opening 11 and the like. The upper region of the large product storage box 13 can be cooled well. Further, during operation of the Stirling refrigerator 20 (when a certain time has elapsed since the start of the Stirling refrigerator 20), each cooling refrigerant passing through the evaporation path 322a and the flow path 360a has the largest amount of intrusion heat. After the heat exchange is performed in the upper part of each region, heat exchange is performed in the lower part of each region of the product storage box 13, so that the cooling refrigerant is relatively easy in the evaporation path 322 a and the flow path 360 a. The steam can be circulated well.

  Further, according to the showcase 4, the high temperature exhaust heat transporting means 400 circulates the heat radiation refrigerant among the heat radiation heat exchanger 410, the first line 43, the air heat exchanger 42 and the second line 44. Since the high-temperature exhaust heat generated in the high-temperature portion 22 of the Stirling refrigerator 20 is transported to the outside, there is no possibility that the high-temperature exhaust heat stays inside the case body 102, and the operation efficiency of the Stirling refrigerator 20 is improved. be able to.

<Embodiment 5>
FIGS. 15 and 16 schematically show a showcase according to Embodiment 5 of the present invention, FIG. 15 is a front view, and FIG. 16 is a cross-sectional side view. The showcase 5 illustrated here is for selling products such as ice cream, and includes a case main body 103. In addition, the same code | symbol is attached | subjected and demonstrated to what has the same structure as the showcase 1 in Embodiment 1 mentioned above.

  The case main body 103 is a housing having an opening 11 on the upper surface, and includes a glass door (door body) 12 for opening and closing the opening 11, and product storage boxes 13 a and 13 b and Stirling inside. A refrigerator 20, a cold heat transport means 303 and a high temperature exhaust heat transport means 400 are provided.

  The glass door 12 is, for example, a sliding door type. When the glass door 12 is opened, the opening 11 is opened. When the glass door 12 is closed and fully closed, the opening 11 is closed. Is.

  The product storage boxes 13a and 13b are made of a heat transfer material such as a metal material, for example, and are box bodies whose upper surfaces are open. Here, a plurality (two in the illustrated example) of product storage boxes 13a and 13b are provided. These merchandise storage boxes 13a and 13b are both arranged in a side-by-side manner in the lower area of the opening 11 inside the case main body 103, and are for storing merchandise. A heat insulating material 14 such as a heat insulating board is laid around each of the product storage boxes 13a and 13b. Thereby, each goods storage box 13a, 13b is arrange | positioned inside the case main body 103 in the heat-insulated aspect.

  The Stirling refrigerator 20 is placed horizontally in the rear region of the opening 11 inside the case main body 103 and above the product storage boxes 13a and 13b. As shown in FIG. 17, the Stirling refrigerator 20 includes a cylindrical low temperature portion 21 that generates cold heat when driven and a cylindrical high temperature portion 22 that generates high temperature exhaust heat.

  The cold heat transport means 303 is for transporting cold heat generated in the low temperature part 21 of the Stirling refrigerator 20 to the commodity storage boxes 13a and 13b, and includes a first cold heat transport pipe 303a and a second cold heat transport pipe 303b. It is. As shown in FIG. 17, the first cold heat transport pipe 303a is a heat pipe in which a cooling refrigerant (working fluid) is enclosed, and the condensing heat exchanger 31 and the evaporating heat exchanger 323 are connected to a liquid. A line (delivery flow path) 333 and a gas line (return flow path) 343 are separately connected. Here, as the cooling refrigerant, for example, a gas (such as carbon dioxide) that is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 21 of the Stirling refrigerator 20 (an antifreeze refrigerant) is used.

  The condensing heat exchanger 31 is disposed in such a manner as to cover the side peripheral surface of the low temperature part 21 of the Stirling refrigerator 20. More specifically, the condensation heat exchanger 31 has a cylindrical shape whose diameter is larger than that of the low temperature portion 21 of the Stirling refrigerator 20, and a flow path (not shown) through which the cooling refrigerant passes. ) Is formed. The condensing heat exchanger 31 is thermally connected to the low temperature portion 21, and the cooling refrigerant in the flow path is condensed by the cold heat from the low temperature portion 21.

  The evaporative heat exchanger 323 is provided on the outer surface of the product storage box 13a, and more specifically, an evaporation path (flow path) provided in such a manner that the one product storage box 13a is wound from above to below. ) 323a. The evaporation path 323a is for the cooling refrigerant to pass from the upper side to the lower side. In such an evaporative heat exchanger 323, as will be described in detail later, a cooling refrigerant that passes through the evaporating path 323a by heat obtained from the product stored in the one product storage box 13a and the internal atmosphere of the product storage box 13a. Evaporates into steam. In other words, the products and the like stored in the one product storage box 13a are cooled because heat is taken away as the cooling refrigerant evaporates. Moreover, since the evaporative heat exchanger 323 is provided on the outer surface of the commodity storage box 13 a, the evaporative heat exchanger 323 is disposed below the reference height of the low temperature part 21 of the Stirling refrigerator 20.

  The liquid line 333 is a pipe line that connects the condensation heat exchanger 31 and the evaporation heat exchanger 323. The liquid line 333 is for sending the cooling refrigerant condensed in the condensation heat exchanger 31 from the condensation heat exchanger 31 to the evaporation heat exchanger 323. In the middle of the liquid line 333, a first heat exchanger 351 is disposed as will be described later, and an electromagnetic valve 333a is provided at a location downstream of the first heat exchanger 351. The electromagnetic valve 333a is individually opened and closed when a command is given from a control unit (not shown). More specifically, when the solenoid valve 333a is opened, the solenoid valve 333a allows the cooling refrigerant condensed by the condensation heat exchanger 31 to move. On the other hand, when the solenoid valve 333a is closed, the solenoid valve 333a condenses in the condensation heat exchanger 31. This is to regulate the movement of the cooling refrigerant.

  The gas line 343 is a pipe line that connects the condensation heat exchanger 31 and the evaporation heat exchanger 323 separately from the liquid line 333. The gas line 343 is for returning the cooling refrigerant evaporated in the evaporating heat exchanger 323 from the evaporating heat exchanger 323 to the condensing heat exchanger 31.

  The first cold transport pipe 303a is configured such that the cooling refrigerant circulates between the condensing heat exchanger 31 and the evaporating heat exchanger 323 through the liquid line 333 and the gas line 343 separately provided. This is called a type thermosiphon heat pipe.

  As shown in FIG. 17, the second cold heat transport pipe 303 b is a heat pipe in which a cooling refrigerant (working fluid) is enclosed, and the first heat exchanger 351 and the second heat exchanger 361 are connected to each other. The transmission line 371 and the feedback line 381 are separately connected. Here, as the cooling refrigerant, for example, a gas (such as carbon dioxide) that is a gas at normal temperature and does not freeze with the cold heat from the low temperature portion 21 of the Stirling refrigerator 20 (an antifreeze refrigerant) is used.

  The 1st heat exchanger 351 is provided in the middle of the liquid line 333 which comprises the said 1st cold heat transport piping 303a, and has the flow path 351a thermally connected with this liquid line 333. The first heat exchanger 351 exchanges heat between the cooling refrigerant flowing through the flow path 351a and the cooling refrigerant passing through the liquid line 333. Thereby, the cooling refrigerant flowing in the flow path 351a receives a part of the cold generated in the low temperature part 21 of the Stirling refrigerator 20 from the cooling refrigerant passing through the liquid line 333.

  The second heat exchanger 361 is provided on the outer surface of the product storage box 13b. More specifically, the second heat exchanger 361 includes a flow path 361a provided in such a manner that the other product storage box 13b is wound from above to below. It has. The flow path 361a is for the cooling refrigerant to pass from the top to the bottom. In such a second heat exchanger 361, the details will be described later, but for cooling that passes through the flow path 361 a by the heat obtained from the product stored in the other product storage box 13 b and the internal atmosphere of the product storage box 13 b. The refrigerant evaporates into vapor. In other words, the products and the like stored in the other product storage box 13b are cooled because heat is taken away as the cooling refrigerant evaporates. Moreover, since the 2nd heat exchanger 361 is provided on the outer surface of the other goods storage box 13b, it will be arrange | positioned below the reference | standard height of the low-temperature part 21 of the Stirling refrigerator 20. FIG.

  The delivery line 371 is a pipe line that connects the first heat exchanger 351 and the second heat exchanger 361. The delivery line 371 is for delivering the cooling refrigerant received by the first heat exchanger 351 from the first heat exchanger 351 to the second heat exchanger 361.

  The delivery line 371 is provided with an electromagnetic valve 371a. The electromagnetic valves 371a are individually opened and closed when a command is given from a control unit (not shown). More specifically, the electromagnetic valve 371a allows the movement of the cooling refrigerant received by the first heat exchanger 351 when opened, while the first heat exchanger 351 when closed. This is for regulating the movement of the cooling refrigerant that has received the heat.

  The return line 381 is a pipe line that connects the first heat exchanger 351 and the second heat exchanger 361 separately from the delivery line 371. The return line 381 is for returning the cooling refrigerant evaporated in the second heat exchanger 361 from the second heat exchanger 361 to the first heat exchanger 351.

  In the second cold heat transport pipe 303b, the cooling refrigerant circulates between the first heat exchanger 351 and the second heat exchanger 361 through the separately provided delivery line 371 and return line 381. This is called a loop type thermosiphon heat pipe.

  The high-temperature exhaust heat transporting means 400 transports high-temperature exhaust heat generated in the high-temperature part 22 of the Stirling refrigerator 20 to the outside. As shown in FIG. The heat radiation heat exchanger 410 and the air heat exchanger 42 are separately connected by the first line 43 and the second line 44. Here, for example, carbon dioxide, water, or the like is used as the heat radiation refrigerant. In the third embodiment, the heat radiation refrigerant will be described as carbon dioxide.

  The radiant heat exchanger 410 is arranged in such a manner as to cover the side peripheral surface of the high temperature part 22 of the Stirling refrigerator 20. More specifically, the heat radiation heat exchanger 410 has a cylindrical shape whose diameter is larger than that of the high temperature portion 22 of the Stirling refrigerator 20, and a flow path (not shown) through which the heat radiation refrigerant passes. ) Is formed. The heat radiating heat exchanger 410 is thermally connected to the high temperature portion 22, and the heat radiating refrigerant in the flow path evaporates due to the high temperature exhaust heat from the high temperature portion 22, or the outdoor temperature in summer or the like is 31 ° C. If it exceeds, it becomes a supercritical state.

  The air heat exchanger 42 is disposed at a position separated from the Stirling refrigerator 20 by a predetermined distance. This air heat exchanger 42 has a meandering heat radiation path 42a. The heat radiation path 42a is for passage of the heat radiation refrigerant. In such an air heat exchanger 42, the high-temperature exhaust heat received by the heat dissipation heat exchanger 410 is radiated to the surrounding air when the heat dissipation refrigerant passes through the heat dissipation path 42a. Thereby, ambient air is heated by high temperature exhaust heat. In addition, the air heat exchanger 42 is disposed above the reference height of the high temperature part 22 of the Stirling refrigerator 20. A discharge fan (not shown) is provided at a predetermined location around the air heat exchanger 42. The discharge blower fan is for discharging the air heated by the air heat exchanger 42 to the outside.

  The first line 43 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42. The first line 43 is for moving the heat-dissipating refrigerant that has received the high-temperature exhaust heat in the heat-dissipating heat exchanger 410 to the air heat exchanger 42.

  The second line 44 is a pipe line that connects the heat radiation heat exchanger 410 and the air heat exchanger 42 separately from the first line 43. The second line 44 is for moving the heat-dissipating refrigerant radiated by the air heat exchanger 42 to the heat-radiating heat exchanger 410.

  In such a high temperature exhaust heat transport means 400, the high temperature exhaust heat from the high temperature part 22 of the Stirling refrigerator 20 is released to the outside as follows. The heat-dissipating refrigerant passing through the flow path of the heat-dissipating heat exchanger 410 receives the high-temperature exhaust heat generated in the high-temperature portion 22 and moves upward, and then moves to the air heat exchanger 42 through the first line 43. In the air heat exchanger 42, the heat radiation refrigerant radiates high-temperature exhaust heat to the ambient air of the air heat exchanger 42 while passing through the heat radiation path 42a. That is, the ambient air around the air heat exchanger 42 is heated. The heated air is sent to the outside by driving the discharge fan. By the way, the heat-dissipating refrigerant radiated by the air heat exchanger 42 reaches the heat-dissipating heat exchanger 410 through the second line 44, and then receives high-temperature exhaust heat again when passing through the flow path. Repeat cycle. Here, when the outside air temperature in summer or the like exceeds 31 ° C., carbon dioxide, which is a heat-dissipating refrigerant, circulates in a supercritical state.

  In the high-temperature exhaust heat transport means 400, the heat radiation refrigerant circulates between the heat radiation heat exchanger 410 and the air heat exchanger 42 through the first line 43 and the second line 44 provided separately. This is called a loop type thermosiphon heat pipe.

  In the showcase 5 as described above, the cold heat from the low temperature part 21 of the Stirling refrigerator 20 is transported to the commodity storage boxes 13a and 13b through the cold heat transport means 303 as follows. Here, the solenoid valve 333a provided in the liquid line 333 and the solenoid valve 371a provided in the delivery line 371 are both opened to allow the cooling refrigerant to move.

  In the first cold heat transport pipe 303a constituting the cold heat transport means 303, the cooling refrigerant (gaseous refrigerant) passing through the flow path of the condensation heat exchanger 31 is cooled and condensed by the cold heat generated from the low temperature portion 21, and is liquefied. It moves downward due to the gravity. Thereafter, the cooling refrigerant passes through the liquid line 333 and moves to the evaporation path 323 a of the evaporation heat exchanger 323. In this evaporative heat exchanger 323, the cooling refrigerant passes through the evaporating path 323a from the upper side to the lower side, while the product stored in the one product storage box 13a or the heat of the internal atmosphere of the product storage box 13a. Evaporate. That is, the product stored in the one product storage box 13a and the internal atmosphere of the product storage box 13a are cooled by taking heat away, and thus the cold heat generated in the low temperature part 21 of the Stirling refrigerator 20 is obtained. Is transported to the commodity storage box 13a. By the way, the cooling refrigerant evaporated in the evaporating heat exchanger 323 reaches the condensing heat exchanger 31 through the gas line 343, is condensed again when passing through the flow path, and repeats the above-described cycle.

  On the other hand, in the second cold heat transport pipe 303b constituting the cold heat transport means 303, the cooling refrigerant passing through the flow path 351a of the first heat exchanger 351 performs heat exchange with the cooling refrigerant passing through the liquid line 333, The cooling refrigerant receives a part of the cold obtained by condensing in the condensation heat exchanger 31. Thereafter, the cooling refrigerant passes through the delivery line 371 and moves to the flow path 361a of the second heat exchanger 361. In the second heat exchanger 361, the cooling refrigerant passes through the flow path 361a from the upper side to the lower side, while the product stored in the other product storage box 13b or the heat of the internal atmosphere of the product storage box 13b. Evaporates. That is, the product stored in the other product storage box 13b and the internal atmosphere of the product storage box 13b are cooled by heat being removed, and thereby the cold heat generated in the low temperature portion 21 of the Stirling refrigerator 20 is obtained. Is transported to the commodity storage box 13b. By the way, the cooling refrigerant evaporated in the second heat exchanger 361 reaches the first heat exchanger 351 through the feedback line 381, receives heat again when passing through the flow path 351a, and repeats the above-described cycle. As a result, the products stored in the product storage boxes 13a and 13b and the internal atmosphere of the product storage boxes 13a and 13b can be cooled to a desired cooling temperature (for example, −20 by the first cold transport pipe 303a and the second cold transport pipe 303b). ℃ etc.).

  On the other hand, when one electromagnetic valve 333a, 371a is closed to restrict the movement of the cooling refrigerant, the cooling refrigerant does not pass downstream of the electromagnetic valves 333a, 371a. Therefore, for example, when the electromagnetic valve 371a provided in the delivery line 371 is closed, the flow path 361a (second heat exchanger 361) on the downstream side of the electromagnetic valve 371a accommodates the cooling refrigerant and other commodities. Heat exchange with the internal atmosphere of the box 13b is not performed.

  Therefore, when it is not necessary to cool the internal atmosphere of the one product storage box 13a, 13b due to circumstances such as the temperature of the internal atmosphere of the one product storage box 13a, 13b being extremely low, the product storage box 13a , 13b, the solenoid valves 333a and 371a on the upstream side of the evaporation path 323a or the flow path 361a are instructed to be closed by the main controller, thereby cooling the evaporation path 323a or the flow path 361a. What is necessary is just to regulate that the refrigerant for use passes.

  As described above, according to the showcase 5 in Embodiment 5 of the present invention, the first cold heat transport pipe 303a (cold heat transport means 303) has a flow path that is thermally connected to the low temperature portion 21 of the Stirling refrigerator 20. And a condensing heat exchanger 31 for condensing the cooling refrigerant flowing through the flow path by the cold heat generated in the low temperature portion 21, and an evaporating path 323a arranged in such a manner as to wind one commodity storage box 13a. Then, the cooling refrigerant flowing in the evaporation path 323a evaporates and the product stored in the product storage box 13a is cooled, and the cooling heat condensed in the condensation heat exchanger 31 is exchanged for evaporation heat. A liquid line 333 for moving to the condenser 323 and a gas line 343 for moving the cooling refrigerant evaporated in the evaporating heat exchanger 323 to the condensing heat exchanger 31, and condensing the cooling refrigerant to the condensing heat exchanger 31 By circulating between the liquid line 333, the evaporating heat exchanger 323, and the gas line 343, the cold generated in the low temperature part 21 of the Stirling refrigerator 20 is transported to one commodity storage box 13a, and the second cold transport pipe 303b ( The cold heat transport means 303) has a flow path 351a thermally connected to the liquid line 333, and exchanges heat between the cooling refrigerant flowing through the flow path 351a and the cooling refrigerant passing through the liquid line 333. It has the flow path 361a arrange | positioned in the aspect which winds the 1st heat exchanger 351 and the other goods storage box 13b, and the refrigerant | coolant for cooling which flows through this flow path 361a evaporates to this goods storage box 13b. A second heat exchanger 361 for cooling the stored product, a delivery line 371 for moving the cooling refrigerant received by the first heat exchanger 351 to the second heat exchanger 361, and a second heat exchange And a return line 381 for moving the cooling refrigerant evaporated in 361 to the first heat exchanger 351, and the cooling refrigerant for the first heat exchanger 351, the delivery line 371, the second heat exchanger 361, and the feedback. Since a part of the cold generated in the low temperature part 21 of the Stirling refrigerator 20 is transported to the other commodity storage box 13b by circulating between the lines 381, the cold generated in the low temperature part 21 of the Stirling refrigerator 20; The temperature difference from the cold heat transported to the product storage boxes 13a and 13b can be made extremely low, and no fluorocarbon refrigerant is used. Therefore, it is preferable from the viewpoint of environmental protection, and the cold generated in the low temperature part 21 of the Stirling refrigerator 20 can be efficiently transported to the product storage boxes 13a and 13b to cool the product.

  In particular, according to the showcase 5 described above, the evaporation path 323a constituting the evaporation heat exchanger 323 is arranged in such a manner as to wind the one commodity storage box 13a, and the flow path 361a constituting the second heat exchanger 361 is provided. Since it arrange | positions in the aspect which rolls the other goods storage box 13b, it can be made to heat-exchange with the cooling refrigerant | coolant which passes the evaporating path 323a or the flow path 361a in the goods storage box 13a, 13b, respectively, It becomes possible to individually cool the products for each of the storage boxes 13a and 13b, and the inside of each of the product storage boxes 13a and 13b can be set to different temperature zones. Therefore, it becomes possible to cope with cooling of various products.

  Further, according to the showcase 5, the solenoid valves 333a and 371a can be opened and closed to restrict the movement of the cooling refrigerant, thereby finely controlling the temperatures of the product storage boxes 13a and 13b. As a result, it becomes possible to cope with cooling of various products.

  Further, according to the showcase 5, since the cooling refrigerant passes through the evaporation path 323a and the flow path 361a from the upper side to the lower side, the cooling refrigerant passes through the upper area of each of the product storage boxes 13a and 13b. As a result, the upper region of each of the product storage boxes 13a and 13b having the largest amount of intrusion heat due to the influence of the opening 11 or the like can be cooled satisfactorily. Further, during the operation of the Stirling refrigerator 20 (when a fixed time has elapsed since the start of the Stirling refrigerator 20), each product storage box 13a in which the cooling refrigerant passing through the evaporation path 323a and the flow path 361a has the largest amount of intrusion. , 13b and heat exchange in the lower region of each product storage box 13a, 13b after the heat exchange in the upper region, thereby making it possible to make the cooling refrigerant relatively vapor in the evaporation path 323a. It can be circulated well.

  Further, according to the showcase 5, the high-temperature exhaust heat transporting means 400 circulates the heat radiation refrigerant among the heat radiation heat exchanger 410, the first line 43, the air heat exchanger 42, and the second line 44. Since the high-temperature exhaust heat generated in the high-temperature portion 22 of the Stirling refrigerator 20 is transported to the outside, there is no possibility that the high-temperature exhaust heat stays inside the case body 103, and the operation efficiency of the Stirling refrigerator 20 is improved. be able to.

  Although the fifth embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. For example, as shown in FIG. 18, the electromagnetic valves 333a and 371a need not be provided. Even with such a configuration, the evaporation path 323a that constitutes the evaporation heat exchanger 323 is arranged in such a manner that the one commodity storage box 13a is wound, and the flow path 361a that constitutes the second heat exchanger 361 is different from the other one. Since the merchandise storage box 13b is wound around, the merchandise storage boxes 13a and 13b can exchange heat with the cooling refrigerant passing through the evaporation path 323a or the flow path 361a. Products can be individually cooled for each of 13a and 13b, and the inside of each product storage box 13a and 13b can be set to different temperature zones. Therefore, it becomes possible to cope with cooling of various products.

  Further, as shown in FIG. 19, the gas line 343 and the feedback line 381 may be provided with electromagnetic valves 343a and 381a. Even with such a configuration, the solenoid valves 343a and 381a can be opened and closed to restrict the movement of the cooling refrigerant, thereby enabling fine control of the temperatures of the product storage boxes 13a and 13b. As a result, it becomes possible to cope with cooling of various products.

  As described above, the showcase according to the present invention is useful for selling products such as ice cream.

It is the front view which showed simply the showcase in Embodiment 1 of this invention. It is the cross-sectional side view which showed simply the showcase in Embodiment 1 of this invention. It is the schematic diagram which showed typically the Stirling refrigerator, cold heat transport means, and high temperature waste heat transport means which were shown to FIG. 1 and FIG. It is the front view which showed the modification of the showcase of this invention simply. It is the cross-sectional side view which showed the modification of the showcase of this invention simply. It is the cross-sectional side view which showed simply the showcase in Embodiment 2 of this invention. It is the schematic diagram which showed typically the Stirling refrigerator, cold heat transport means, and high temperature waste heat transport means which were shown in FIG. It is the front view which showed simply the showcase in Embodiment 3 of this invention. It is the cross-sectional side view which showed simply the showcase in Embodiment 3 of this invention. It is the schematic diagram which showed typically the Stirling refrigerator, cold heat transport means, and high temperature waste heat transport means which were shown in FIG. 8 and FIG. It is the schematic diagram which showed the principal part of the modification of the showcase in Embodiment 3 of this invention typically. It is the schematic diagram which showed the principal part of the modification of the showcase in Embodiment 3 of this invention typically. It is the cross-sectional side view which showed simply the showcase in Embodiment 4 of this invention. It is the schematic diagram which showed typically the Stirling refrigerator, cold heat transport means, and high temperature waste heat transport means which were shown in FIG. It is the front view which showed simply the showcase in Embodiment 5 of this invention. It is the cross-sectional side view which showed simply the showcase in Embodiment 5 of this invention. FIG. 17 is a schematic diagram schematically showing the Stirling refrigerator, the cold heat transport means, and the high temperature exhaust heat transport means shown in FIGS. 15 and 16. It is the schematic diagram which showed the principal part of the modification of the showcase in Embodiment 5 of this invention typically. It is the schematic diagram which showed the principal part of the modification of the showcase in Embodiment 5 of this invention typically.

Explanation of symbols

1 Showcase 10 Case body (housing)
11 Opening 12 Glass door (door)
12a Frame 13 Commodity storage box 20 Stirling refrigerator 21 Low temperature part 22 High temperature part 30 Cold heat transport means 31 Condensation heat exchanger 32 Evaporation heat exchanger 32a Evaporation path 33 Liquid tine (delivery flow path)
34 Gas line (return channel)
40 High temperature exhaust heat transport means 40a First heat radiation system pipe 40b Second heat radiation system pipe 41 First heat radiation heat exchanger 42 Air heat exchanger 42a Heat radiation path 43 First line (outgoing flow path)
44 Second line (return channel)
45 Second heat exchanger 46 Heater 47 Third line 48 Fourth line

Claims (12)

A product storage box for storing products disposed in a housing having an opening on the upper surface;
A Stirling refrigerator that is disposed inside the housing and serves as a cooling source for the product stored in the product storage box;
A door body for opening and closing the opening,
In the showcase in which the product stored in the product storage box is in a state that can be taken out through the opening when the door is opened and the opening is opened,
A condensing heat exchanger having a flow path thermally connected to the low temperature section of the Stirling refrigerator, and condensing the working fluid flowing through the flow path by the cold generated in the low temperature section;
An evaporative heat exchanger having a flow path arranged in a manner to wind the commodity storage box, and evaporating the working fluid flowing through the flow path to cool the commodity stored in the commodity storage box;
A delivery flow path for delivering the working fluid condensed in the condensation heat exchanger to the evaporative heat exchanger;
A return flow path for returning the working fluid evaporated in the evaporative heat exchanger to the condensing heat exchanger, and the cold generated in the low-temperature part of the Stirling refrigerator by circulating the working fluid. A showcase comprising a cold transport means for transporting to a product storage box.   The showcase according to claim 1, wherein the Stirling refrigerator is arranged vertically. A heat-dissipating heat exchanger having a flow path thermally connected to the high-temperature section of the Stirling refrigerator, and receiving the high-temperature exhaust heat generated in the high-temperature section in the working fluid flowing through the flow path;
An air heat exchanger that is disposed at a position separated from the Stirling refrigerator by a predetermined distance, and in which a working fluid flowing through a flow path provided therein exchanges heat with ambient air;
A delivery flow path for delivering the working fluid that has received high-temperature exhaust heat in the heat dissipation heat exchanger to the air heat exchanger;
A return flow path for returning the working fluid that has exchanged heat with ambient air in the air heat exchanger to the radiating heat exchanger, and is generated in the high temperature portion of the Stirling refrigerator by circulating the working fluid. The showcase according to claim 1 or 2, further comprising high-temperature exhaust heat transport means for transporting the high-temperature exhaust heat to the outside.   The high-temperature exhaust heat transporting means transports a part of the high-temperature exhaust heat generated in the high-temperature part of the Stirling refrigerator to the door body in a fully closed state, and heats the door body. Item 4. The showcase according to item 3. The evaporative heat exchanger has a plurality of flow paths arranged in a manner in which different regions of the product storage box are separately wound, and the working fluid flowing through each flow path evaporates to form the product storage box. To cool the goods contained in the
The delivery flow path is a branch point provided in the middle, and the working fluid condensed in the condensation heat exchanger is branched and sent to each of the flow paths.
The return flow path is characterized in that the working fluid evaporated in each flow path constituting the evaporating heat exchanger is merged and returned to the condensation heat exchanger at a confluence provided in the middle. The showcase according to any one of claims 1 to 4. The evaporative heat exchanger has a plurality of flow paths arranged in such a manner that a plurality of product storage boxes arranged inside the housing are separately wound, and the working fluid flowing through each flow path is Evaporates and cools the products stored in each product storage box,
The delivery flow path is a branch point provided in the middle, and the working fluid condensed in the condensation heat exchanger is branched and sent to each of the flow paths.
The return flow path is characterized in that the working fluid evaporated in each flow path constituting the evaporating heat exchanger is merged and returned to the condensation heat exchanger at a confluence provided in the middle. The showcase according to any one of claims 1 to 4.   A valve means for permitting or restricting the movement of the working fluid condensed by the condensation heat exchanger is provided at a location downstream of the branch point in the delivery flow path. Item 7. The showcase according to item 5 or item 6.   The return flow path is provided with valve means for allowing or restricting movement of the working fluid evaporated by the evaporating heat exchanger at a location upstream of the confluence. Item 8. The showcase according to any one of Items 5 to 7. The cold transport means is
A first heat exchanger having a flow path thermally connected to the delivery flow path and exchanging heat between the working fluid flowing through the flow path and the working fluid passing through the delivery flow path;
The flow path constituting the evaporative heat exchanger has a flow path wound around an area different from the area of the product storage box wound, and the working fluid flowing through the flow path evaporates and is stored in the product storage box A second heat exchanger for cooling the finished goods,
A delivery line for delivering the working fluid heat-exchanged in the first heat exchanger to the second heat exchanger;
The working fluid evaporated in the second heat exchanger is returned to the first heat exchanger, and the working fluid is circulated between them. A showcase according to one. The cold transport means is
A first heat exchanger having a flow path thermally connected to the delivery flow path and exchanging heat between the working fluid flowing through the flow path and the working fluid passing through the delivery flow path;
There is a flow path for winding a product storage box separate from the product storage box wound by the flow path constituting the evaporative heat exchanger, and the working fluid flowing through the flow path evaporates into the product storage box. A second heat exchanger for cooling the stored goods;
A delivery line for delivering the working fluid heat-exchanged in the first heat exchanger to the second heat exchanger;
The working fluid evaporated in the second heat exchanger is returned to the first heat exchanger, and the working fluid is circulated between them. A showcase according to one. Valve means for allowing or restricting movement of the working fluid condensed by the condensation heat exchanger at a location downstream of the heat exchange location with the first heat exchanger is provided in the delivery flow path. Provided,
11. The show according to claim 9, wherein the delivery line is provided with valve means for allowing or restricting movement of the working fluid heat-exchanged by the first heat exchanger. Case. The return flow path is provided with valve means for allowing or restricting movement of the working fluid evaporated in the evaporation heat exchanger,
12. The valve according to claim 9, wherein the return line is provided with valve means for allowing or restricting movement of the working fluid evaporated in the second heat exchanger. Showcase.

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