JP2008170032A - Condenser, cooling system and refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling system capable of improving efficiency in heat transport. <P>SOLUTION: In this cooling system 100 comprising a cooling means composed of a low-temperature head 112 of a Stirling refrigerating machine 110 and the like, a condenser 131 thermally connected with the cooling means and condensing a refrigerant circulated therein, and an evaporator 132 connected with the condenser 131 for evaporating the refrigerant, and transporting the cold of the cooling means by allowing the refrigerant flowing out from the condenser 131 to flow down and circulate by gravity force, the condenser 131 comprises a gas inflow portion 131G in which a gas refrigerant flows, a liquid outflow portion 131L from which the condensed liquid refrigerant flows out, a transverse flow channel 131b constituted by horizontally disposing a plurality of narrow tubes arranged in the longitudinal direction for communicating between the gas inflow portion 131G and the liquid outflow portion 131L, and a longitudinal flow channel 131c for communicating the narrow tubes across the transverse flow channel 131b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a condenser that condenses refrigerant by the cold heat of a cooling means. The present invention also relates to a cooling system for transporting the cold heat of the cooling means by a refrigerant and a refrigerator using the same.

  In order to cool the object to be cooled at a position away from the cooling means that is maintained at a low temperature, a cooling system that transports the cold heat of the cooling means using a refrigerant is known. This cooling system includes a condenser that is thermally connected to the cooling means and condenses the refrigerant, and an evaporator that evaporates the refrigerant and cools the object to be cooled.

  Patent Document 1 discloses a refrigerator including a Stirling refrigerator that operates a Stirling cycle. This refrigerator constitutes a cooling system using the low temperature part of the Stirling refrigerator as a cooling means, and a condenser composed of a spiral pipe is fitted into the low temperature part of the Stirling refrigerator. As a result, the gas refrigerant flowing into the condenser is cooled and condensed while flowing through the pipe, and the liquid refrigerant is sent to the evaporator and evaporated. The air flowing through the refrigerator exchanges heat with the evaporator to generate cold air. The gas refrigerant evaporated in the evaporator returns to the condenser, and the cold heat of the cooling means is transported by heat.

  Since the condenser has a small contact area with the cooling means, the heat exchange efficiency is low, and the heat transfer efficiency of the cooling system is deteriorated.

  In order to solve this problem, Patent Document 2 discloses a condenser in which a plurality of thin tubes are arranged in parallel. The condenser is formed in an annular shape and is fitted on a columnar cooling means. In the condenser, a plurality of thin tubes are arranged in parallel between the inlet portion and the outlet portion of the refrigerant. Each narrow tube can be formed with a narrow cross-sectional area because the refrigerant flowing through the inlet and outlet is divided and can increase the contact area with the cooling means. The gas refrigerant flowing in from the inlet portion flows through the narrow tube and is condensed, and the liquid refrigerant flows out from the outlet portion. The liquid refrigerant flowing out from the outlet is evaporated by the evaporator, and the gas refrigerant returns to the condenser.

Japanese Patent Laid-Open No. 2001-33139 (pages 4-5, FIG. 1) Japanese Patent Laid-Open No. 2003-130559 (pages 4 to 6, FIG. 5)

  However, according to the condenser disclosed in Patent Document 2, when the axial direction of the columnar cooling means such as the low temperature part of the Stirling refrigerator is arranged vertically, the thin tubes are arranged horizontally. When the cooling system is a thermosiphon cycle type in which the liquid refrigerant is caused to flow down by gravity, the liquid refrigerant flowing through the horizontal thin tube is difficult to flow out of the condenser. For this reason, there was a problem that the efficiency of heat transport deteriorated.

  An object of this invention is to provide the condenser which can improve the efficiency of heat transport, a cooling system, and a refrigerator using the same.

  In order to achieve the above object, the present invention provides a condenser for condensing a refrigerant that is thermally connected to a cooling means that is maintained at a low temperature and circulates in the interior thereof, a gas inflow portion into which the gas refrigerant flows, and a condensed liquid refrigerant A liquid outflow part through which the refrigerant flows out, a plurality of thin tubes through which the refrigerant flows, and a lateral flow path that connects between the gas inflow part and the liquid outflow part, and a communication between the narrow pipe across the horizontal flow path It is characterized by having a vertical flow path.

  According to this configuration, the gas refrigerant flows from the gas inflow portion into the condenser that is in thermal contact with the cooling means and receives the cold heat of the cooling means while flowing through the transverse flow path formed by the narrow tube to be condensed and liquid. Becomes a refrigerant. The liquid refrigerant in the lateral flow path is guided to the liquid outflow portion. At this time, if the condenser is arranged so that the narrow tube is horizontal, the liquid refrigerant flows down the longitudinal channel and is guided to the narrow tube below. As a result, the liquid refrigerant accumulated in the lower narrow tube is sequentially pushed out and guided to the liquid outflow portion.

  Further, according to the present invention, in the condenser having the above-described configuration, the horizontal flow channel and the vertical flow channel are provided inside a metal having good heat conduction. According to this structure, the refrigerant | coolant which distribute | circulates a horizontal flow path and a vertical flow path receives the cold of a cooling means via the metal closely_contact | adhered to a cooling means.

  In the condenser having the above-described configuration, the gas inflow portion and the liquid outflow portion are extended from the end face of the lateral flow path in a direction in which the narrow tubes are arranged, and the gas inflow portion and the liquid outflow portion are It is characterized by extending in the opposite direction from the end face of the transverse flow path. According to this configuration, the gas refrigerant flowing through the gas inflow portion changes the flow direction to a right angle and flows into the horizontal flow path, and the liquid refrigerant flowing out from the horizontal flow path changes the flow direction to a right angle and flows through the liquid flow out portion. When the condenser is arranged so that the refrigerant flows out downward from the liquid outflow portion, the gas refrigerant flows into the lateral flow path from above via the gas inflow portion.

  Further, the present invention provides the condenser having the above-described configuration, in which the plurality of thin tubes arranged in the vertical direction are horizontally arranged, and in the gas inflow portion, the thin tubes in the lower part are prevented from flowing into the lower thin tubes. The entrance of the door is shielded. According to this configuration, the liquid refrigerant that flows down the vertical flow path and accumulates in the lower narrow tube flows to the liquid refrigerant side because the gas inflow side of the lower narrow tube in which the liquid refrigerant is accumulated is shielded. The end of the capillary tube may be plugged to shield the capillary tube, or the end of the gas inflow portion may be plugged to shield the capillary tube.

  The present invention also includes a cooling means that is maintained at a low temperature, a condenser that is thermally connected to the cooling means and condenses the refrigerant that circulates inside, and an evaporator that is connected to the condenser and evaporates the refrigerant. In the cooling system in which the refrigerant flowing out of the condenser flows down due to gravity and circulates, and heat transports the cold heat of the cooling means, the condenser includes a gas inflow portion into which the gas refrigerant flows and a condensed liquid refrigerant A liquid outflow part through which the gas flows out, a plurality of thin tubes arranged in the vertical direction are horizontally arranged to communicate between the gas inflow part and the liquid outflow part, and the thin tube is crossed across the horizontal flow path. It is characterized by having a longitudinal flow channel that communicates.

  According to this configuration, the cooling system is configured as a loop type thermosiphon cycle type, and the cold heat of the cooling means is transported by the refrigerant. The gas refrigerant flows into the lateral flow path through the gas inflow portion into the condenser that is in thermal contact with the cooling means. The gas refrigerant is condensed by receiving the cold heat of the cooling means while flowing through the horizontal flow path composed of horizontal thin tubes, and becomes a liquid refrigerant. The liquid refrigerant in the lateral flow path is guided to the liquid outflow portion. At this time, the liquid refrigerant flows down the longitudinal channel and is guided to the lower narrow tube, and the liquid refrigerant accumulated in the lower narrow tube is sequentially pushed out and guided to the liquid outflow portion. The liquid refrigerant flowing out from the liquid outflow part flows down by gravity, evaporates in the evaporator, and cools the object to be cooled by heat of vaporization. The refrigerant evaporated in the evaporator rises and returns to the condenser from the gas inflow portion.

  In the cooling system configured as described above, the gas inflow portion extends upward from the end surface of the horizontal flow path, and the liquid outflow portion extends downward from the end surface of the horizontal flow path.

  According to the present invention, in the cooling system configured as described above, the condenser protrudes from the cooling means and is attached to the cooling means. According to this configuration, the lower thin tube through which a large amount of liquid refrigerant circulates and the cooling means are arranged apart from each other.

  In the cooling system configured as described above, the narrow tube protruding from the cooling means is shielded on the gas inflow portion side. According to this configuration, the liquid refrigerant that flows down the vertical flow path and accumulates in the narrow tube that protrudes from the lower surface of the cooling means flows to the liquid refrigerant side because the gas inflow portion side is shielded. The end of the thin tube may be plugged to shield the thin tube, or the lower portion of the gas inflow portion may be plugged to shield the thin tube.

  Further, the present invention is characterized in that, in the cooling system having the above-described configuration, the narrow pipe disposed at the lower portion of the condenser is shielded on the gas inflow portion side. According to this configuration, the liquid refrigerant that flows down the vertical flow path and accumulates in the lower narrow tube flows to the liquid refrigerant side because the gas inflow portion side is shielded. The end of the thin tube may be plugged to shield the thin tube, or the lower portion of the gas inflow portion may be plugged to shield the thin tube.

  In the cooling system having the above-described configuration, the cooling means includes a low-temperature part of a Stirling refrigerator, and a high-temperature part is disposed above the low-temperature part, and the condenser is formed in an annular shape in contact with the low-temperature part. It is characterized by that. According to this configuration, the Stirling refrigerator is installed in a so-called vertical position, and the annular condenser in contact with the low-temperature part disposed below exchanges heat so that the cold heat in the low-temperature part is transported by the refrigerant.

  Moreover, the refrigerator of this invention is equipped with the cooling system of said each structure, and produces | generates cold by heat exchange with the said evaporator, It is characterized by the above-mentioned.

  According to the condenser of the present invention, the liquid refrigerant condensed when the horizontal flow path is disposed horizontally includes the horizontal flow path in which a plurality of thin tubes are arranged side by side and the vertical flow path that communicates the narrow tubes across the horizontal flow path. Is guided to the lower narrow tube through the longitudinal channel. Thereby, the liquid refrigerant which accumulates in the lower narrow tube is pushed out in order, and the liquid refrigerant can easily flow out from the liquid outflow portion. Therefore, the efficiency of heat transport can be improved.

  Further, according to the condenser of the present invention, since the horizontal flow path and the vertical flow path are provided inside the metal having good heat conduction, the cooling heat of the cooling means can be efficiently transmitted to the refrigerant flowing through the horizontal flow path and the vertical flow path. .

  Further, according to the condenser of the present invention, the gas inflow portion and the liquid outflow portion are extended from the end face of the transverse flow path in the direction in which the thin tubes are arranged, so that the rising liquid refrigerant flows into the condenser and flows out from the condenser. It is possible to easily realize a loop-type thermosyphon cooling system in which the lowering is caused by gravity. Further, since the gas inflow portion and the liquid outflow portion extend in opposite directions, the gas inflow portion extends upward when the condenser is arranged so that the liquid outflow portion extends downward. Therefore, the back flow of the liquid refrigerant can be prevented.

  Further, according to the condenser of the present invention, when the gas inflow portion is arranged to extend upward, the lower thin tube is shielded from the gas inflow portion side, so that the liquid refrigerant accumulated in the lower thin tube is guided in the direction of the liquid outflow portion. As a result, the liquid refrigerant can flow out more smoothly.

  Further, according to the present invention, the condenser of the loop thermosyphon cooling system includes a horizontal flow path in which a plurality of horizontal thin tubes are arranged side by side and a vertical flow path that communicates the thin tubes across the horizontal flow path. The liquid refrigerant is guided to the lower narrow tube through the longitudinal channel. Thereby, the liquid refrigerant which accumulates in the lower narrow tube is pushed out in order, and the liquid refrigerant can easily flow out from the liquid outflow portion. Therefore, the efficiency of heat transport can be improved.

  Further, according to the present invention, the condenser of the cooling system can prevent the backflow of the liquid refrigerant because the gas inflow portion extends upward from the end surface of the horizontal flow path and the liquid outflow portion extends downward from the end surface of the horizontal flow path. .

  Further, according to the present invention, since the condenser is provided so as to protrude from the cooling means, the lower thin tube through which a large amount of liquid refrigerant flows is separated from the cooling means, and the cooling heat of the cooling means is given to the upper thin tube. Therefore, cold heat is efficiently used for condensation, and the condensation efficiency of the cooling system can be improved.

  Also, according to the present invention, since the narrow tube protruding from the cooling means is shielded on the gas inflow side, the gas refrigerant is efficiently condensed by guiding the gas refrigerant to the upper part of the horizontal flow path in contact with the cooling means, and the liquid refrigerant in the lower thin tube is Guided in the direction of the liquid outflow portion, the liquid refrigerant can flow out more smoothly.

  Further, according to the present invention, since the narrow tube arranged in the lower part of the condenser is shielded on the gas inflow portion side, the liquid refrigerant accumulated in the lower thin tube is guided in the direction of the liquid outflow portion, so that the liquid refrigerant flows out more smoothly. be able to.

  Further, according to the present invention, the cooling means is composed of the low temperature part of the Stirling refrigerator, and the high temperature part is disposed above the low temperature part, so that heat released upward from the high temperature part does not interfere with the low temperature part. Can be reduced. Further, since the condenser is formed in an annular shape in contact with the low temperature part, heat exchange between the condenser and the low temperature part can be performed efficiently.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of a refrigerator according to an embodiment. The refrigerator 1 has heat insulating doors 20 and 21 arranged on the upper and lower sides thereof. The heat insulating doors 20 and 21 can be opened to the left and right with a position biased leftward with respect to the center, with hinges provided at the left and right ends of the refrigerator 1 as the center. An operation unit 25 for setting the temperature of each part in the storage chamber is provided below the heat insulating door 20.

  Below the heat insulating door 20, heat insulating doors 24 and 22 are juxtaposed in the vertical direction, and can be opened to the left with the hinge provided at the left end of the refrigerator 1 as a center. A heat insulating door 23 is provided below the heat insulating door 21 and can be opened rightward with a hinge provided at the right end of the refrigerator 1 as a center.

  FIG. 2 is a front view showing a state in which the heat insulating doors 20 to 24 of the refrigerator 1 are omitted. The refrigerator 1 has a heat insulating box 10 that forms a main body casing. The heat insulation box 10 has an inner box made of a resin molded product inserted into an outer box made of sheet metal, and a gap between the outer box and the inner box is filled with a foam heat insulating material.

  Inside the heat insulating box 10, a plurality of storage chambers whose fronts are opened are formed by the inner box. That is, the inside of the heat insulation box 10 is partitioned up and down by the horizontal partition wall 11. The upper part of the horizontal partition wall 11 is divided into left and right by a vertical partition wall 12 to form a left refrigerator compartment 15 and a right refrigerator compartment 16. The front surfaces of the left refrigerator compartment 15 and the right refrigerator compartment 16 are opened and closed by heat insulating doors 20 and 21 (see FIG. 1), respectively.

  A lower part of the horizontal partition wall 11 is divided into left and right by a vertical partition wall 13, and a right freezer compartment 18 is formed on the right side. The left side of the vertical partition wall 13 is further divided up and down by a horizontal partition wall 14 to form a multi chamber 19 and a left freezing chamber 17. The multi-chamber 19 can be used as a refrigerator or a freezer by switching the room temperature. The front surfaces of the left freezer compartment 17, the right freezer compartment 18, and the multi compartment 19 are opened and closed by heat insulating doors 22, 23, and 24 (see FIG. 1), respectively.

  A drawer-type refrigerated food case 31 is disposed in the lower part of the left refrigeration chamber 15. The upper part of the refrigerated food case 31 is divided into three stages in the vertical direction by the shelf 30. In the lower part of the left refrigeration chamber 15, drawer-type refrigerated food cases 33 and 34 are arranged in two upper and lower stages. The upper part of the refrigerated food case 33 is divided into three stages in the vertical direction by the shelf 32. The refrigerated food cases 33 and 34 are partitioned by a partition cover 35 (see FIG. 3). Further, a water supply tank 45 for ice making is arranged on the right side of the refrigerated food case 34.

  In the left freezer compartment 17, drawer-type frozen food cases 40 a and 40 b that overlap in two upper and lower stages are arranged. In the right freezer compartment 18, drawer-type frozen food cases 41 a, 41 b, 41 c that overlap in three upper and lower stages are arranged. A multi-use food container 42 is provided in the multi-chamber 19.

  FIG. 3 shows a right side cross-sectional view of the refrigerator 1 in a cross section passing through the right refrigerator compartment 16 and the right freezer compartment 18. On the upper surface of the heat insulating box 10, an electrical box 81 that houses the control unit 80 (see FIG. 8) is disposed. An illumination panel 38 having an LED light source is provided on the upper back of the right refrigerator compartment 16 to illuminate the inside of the right refrigerator compartment 16. On the inner surface of the heat insulating door 21, a rack 36 for storing bottles, paper packs for beverages and the like is attached.

  The lowermost shelf 32a of the right refrigerator compartment 16 has a depth dimension larger than that of the upper shelf 32a, and an independent refrigerator compartment 16a is formed between the shelf 32a covering the upper surface of the refrigerator food case 34. In addition, an independent refrigerator compartment 16 b is formed below the partition cover 35. The independent refrigerator compartments 16 a and 16 b are isolated in the right refrigerator compartment 16 and maintained at a temperature different from that of the upper portion of the right refrigerator compartment 16.

  An ice making unit 43 that makes ice by supplying water from a water supply tank 45 (see FIG. 2) is disposed on the ceiling of the right freezer compartment 18. Ice produced by the ice making unit 43 is stored in an ice container 44 (see FIG. 2) disposed in the frozen food case 41a.

  A cold air duct 50 is provided on the back surface of the right freezer compartment 18. In the cold air duct 50, the low temperature side evaporator 132 maintained at low temperature by the cooling system 100 (refer FIG. 8) mentioned later is arrange | positioned. The air flowing through the cold air duct 50 exchanges heat with the low temperature evaporator 132 to generate cold air.

  A defrost heater 77 is disposed below the low temperature side evaporator 132. A funnel-shaped drain pipe 78 is disposed below the defrost heater 77, and the lower end of the drain pipe 78 opens on a drain pan 153 disposed outside the heat insulating box 10. Thereby, the low temperature side evaporator 132 is defrosted by driving of the defrost heater 77, and the drain water is dripped onto the drain pan 132 through the drain pipe 78. The drain water accumulated in the drain pan 132 is evaporated by the air from the drain evaporation fan 154 and the heat from the high-temperature pipe 152 (see FIG. 8) described later.

  In front of the cold air duct 50, a cold air duct 51 communicating with the cold air duct 50 through a freezer compartment fan 53 is provided. In the lower part of the cold air duct 50, an air inlet 52 is formed which sucks air flowing out from each storage chamber and returns it to the low temperature side evaporator 132.

  Above the cold air duct 51, a cold air duct 54 that communicates with the cold air duct 51 via the cold room discharge damper 55 is disposed. A cold room fan 56 is provided in the cold air duct 54. The cold air duct 54 is bent from the back surface of the right refrigerator compartment 16 and extends into the vertical partition wall 12 (see FIG. 2).

  The cold air duct 54 in the vertical partition wall 12 is formed in a U-shape projecting upward, and has an ascending passage 54U, a horizontal passage 54H, and a descending passage 54D. The cold air rises in the ascending passage 54U and descends in the descending passage 54D. In the ascending passage 54U, a plurality of cool air discharge ports 57 for discharging cool air to the right refrigerator compartment 16 are formed at predetermined intervals in the vertical direction. A plurality of cool air discharge ports 58 for discharging cool air to the left refrigerator compartment 15 are formed in the descending passage 54D at predetermined intervals in the vertical direction.

  A transverse cold air duct 61 branches off from the upper end of the rising passage 54U. The transverse cold air duct 61 is horizontally disposed along the corner portion at the back of the ceiling of the right refrigerator compartment 16. In the horizontal cold air duct 61, a plurality of cold air discharge ports 62 (see FIG. 6) for discharging cold air to the right refrigerator compartment 16 are formed at predetermined intervals in the horizontal direction.

  Further, the cold air duct 54 branches off from the horizontal cold air duct 59 before entering the vertical partition wall 12. The transverse cold air duct 59 is horizontally disposed along the lower surface of the lowermost shelf 32. In the horizontal cold air duct 61, a plurality of cold air discharge ports 60 (see FIG. 6) for discharging cold air into the refrigerated food case 33 of the independent refrigerator compartment 16a are formed at intervals in the horizontal direction.

  FIG. 4 is a right side cross-sectional view of the refrigerator 1 having a cross section passing through the left refrigerator compartment 15 and the left freezer compartment 19. FIG. 5 is a cross-sectional view taken along the line AA in FIG. A downlight 37 having an LED light source is provided on the ceiling surface of the left refrigerator compartment 15 to illuminate the interior of the left refrigerator compartment 15. A machine room 45 is formed behind the left refrigerator compartment 15 by a recess provided in the heat insulating box 10. In the machine room 45, a Stirling refrigerator 110 of a cooling system 100 (see FIG. 8) described later is arranged.

  A cold air duct 66 that branches from the cold air duct 51 (see FIG. 3) via the multi-chamber discharge damper 67 (see FIG. 6) is provided on the back surface of the multi-chamber 19. A multi-chamber fan 68 and a multi-chamber heater 69 are arranged in the cold air duct 66, and a cold air discharge port 70 for discharging cool air to the multi-chamber 19 is provided. A return passage 75 communicating with the intake port 52 is provided below the cold air duct 66. A multi-chamber return damper 76 is provided in the return passage 75.

  6 and 7 show a front view and a block diagram for explaining the flow of the cold air in the refrigerator 1. A through hole 74 is provided in the lower part of the vertical partition wall 12 to allow the left refrigerator compartment 15 and the independent refrigerator compartment 16b of the right refrigerator compartment 16 to communicate with each other. The cold air flowing through the left refrigerator compartment 15 flows into the independent refrigerator compartment 16b through the through hole 74. In the lower right part of the right refrigeration chamber 16, a return passage 71 is provided that opens outflow ports 72 and 73 to the independent refrigeration chambers 16a and 16b. The return passage 71 communicates with the intake port 52 (see FIG. 2), and returns the cold air flowing through the right refrigerator compartment 16 to the low temperature side evaporator 132.

  In the cold air duct 51 on the back side of the right freezer compartment 18, the aforementioned cold air ducts 54 and 66 are branched, and the cold air duct 63 is branched. The cold air duct 63 is provided with a left freezer compartment discharge damper 64, and the cold air is discharged into the left freezer compartment 17 through the cold air outlet 65 by opening and closing the left freezer compartment discharge damper 64. The cool air duct 51 is also formed with a cool air discharge port (not shown) for directly discharging cool air to the right freezer compartment 18. The cold air that has circulated in the right freezer compartment 18 returns to the low-temperature side evaporator 132 via the intake port 52.

  A passage (not shown) for guiding the cold air flowing out from the left freezer compartment 17 to the return duct 75 is formed. As a result, the cold air flowing through the left freezer compartment 17 returns to the low temperature side evaporator 132 via the intake port 52.

  When the freezer compartment fan 53 is driven, cold air generated by the low temperature side evaporator 132 is discharged to the right freezer compartment 18. As will be described in detail later, the cooling system 100 (see FIG. 8) of the present embodiment can set the cold air temperature to about −40 ° C., which is lower than that of a normal compressor type cooling system. For this reason, the right freezer compartment 18 from which the cool air blows directly from the freezer compartment fan 53 can reduce the room temperature to about −40 ° C.

  Further, an ice making fan (not shown) provided in the ice making unit 43 performs ice making by blowing this cold air on water. For this reason, ice making can be performed rapidly. The cold air flowing through the right freezer compartment 18 returns to the low temperature side evaporator 132 via the intake port 52. In addition, by suppressing the refrigerating capacity of the cooling system 100, a cold air temperature of about −18 ° C. can be obtained.

  Cold air flows into the left freezer compartment 17 via the left freezer compartment discharge damper 64. The left freezer compartment 17 can control the amount of cool air flowing in by adjusting the opening degree of the left freezer compartment discharge damper 64. For this reason, irrespective of the right freezer compartment 18, the temperature of the left freezer compartment 17 can be maintained at -18 ° C which is a normal freezing temperature. The cold air flowing through the left freezer compartment 17 returns to the low-temperature side evaporator 132 through the return passage 75.

  Cold air flows into the multi-chamber 19 through the multi-chamber discharge damper 67 and is used in a wide temperature range from a chilled temperature to a freezing temperature of −18 ° C. The temperature adjustment of the multi-chamber 19 is performed by controlling the amount of cold air flowing through the multi-chamber discharge damper 67 and the multi-chamber return damper 76. Further, if necessary, the multi-chamber heater 69 is driven to raise the temperature of the cool air, and the temperature of the multi-chamber 19 is controlled. The cold air flowing through the multi-chamber 19 returns to the low temperature side evaporator 132 through the multi-chamber return damper 76 and the return passage 75.

  Since the multi-chamber 19 is also used for thawing frozen food, the temperature difference from the right freezer compartment 18 may increase. In order to prevent the high temperature of the multi-chamber 19 from affecting the right freezer compartment 18, the vertical partition wall 13 has a particularly thick heat insulating layer between the multi-chamber 19 and the right freezer compartment 18. Further, the return passage 75 is provided independently from the right freezer compartment 18 so that air returning from the multi-chamber 19 to the intake port 52 does not enter the right freezer compartment 18.

  Cold air is fed into the left refrigerator compartment 15 and the right refrigerator compartment 16 through the cold air duct 54 by driving the refrigerator compartment fan 56. The amount of cold air is adjusted by the refrigerator discharge damper 55 so that the left refrigerator compartment 15 and the right refrigerator compartment 16 are not overcooled. The cold air flowing through the cold air duct 54 is discharged from the cold air discharge port 57 to the right refrigerator compartment 16 while ascending the ascending passage 54U. Since a plurality of the cold air discharge ports 57 are formed at a predetermined interval in the vertical direction above the independent refrigeration chamber 16a, the right refrigeration chamber 16 is uniformly cooled.

  A part of the cold air flowing through the rising passage 54U flows into the horizontal cold air duct 61 near the upper end and is discharged from the cold air discharge port 62. Since a plurality of the cold air discharge ports 62 are formed at predetermined intervals in the horizontal direction, the upper side of the independent refrigerator compartment 16a is cooled more uniformly.

  The cold air flowing into the descending passage 54D from the ascending passage 54U through the horizontal passage 54H is discharged from the cold air discharge port 58 to the left refrigerator compartment 15 while descending the descending passage 54D. Since the plurality of cold air discharge ports 58 are formed at predetermined intervals in the vertical direction, the left refrigerator compartment 15 is uniformly cooled.

  As the cold air flowing through the rising passage 54U rises, the cold air is indirectly discharged to the left refrigerator compartment 15 and the right refrigerator compartment 16. Thereby, since the temperature of the cold air is increased, the temperature of the left refrigerator compartment 15 becomes higher than the temperature of the right refrigerator compartment 16.

  By providing the cold air ducts (54U, 54D) by effectively utilizing the internal space of the vertical partition wall 12, the depth of the left refrigerator compartment 15 and the right refrigerator compartment 16 can be expanded. Further, since the cool air is discharged from the ascending passage 54U to the right refrigerator compartment 16 and the cool air is discharged from the descending passage 54D to the left refrigerator compartment 15, a temperature difference can be easily provided between the right refrigerator compartment 16 and the left refrigerator compartment 15. it can.

  The cold air flowing through the cold air duct 54 flows into the transverse cold air duct 59 before flowing into the ascending passage 54U. The cold air that has entered the transverse cold air duct 59 is discharged from a plurality of cold air discharge ports 60 that are arranged at predetermined intervals in the horizontal direction, and uniformly cools the independent refrigerator compartment 16a. By adjusting the amount of cold air discharged from the cold air duct 59, it can be used as a chilled room or an ice greenhouse lower in temperature than the upper right refrigerator compartment 16. The amount of cold air can be adjusted by the cross-sectional area of the transverse cold air duct 59, the opening area of the cold air outlet 60, and the like. Further, a damper may be provided in the lateral cold air duct 59.

  Return air from the left refrigerator compartment 15 flows into the independent refrigerator compartment 16b through the through hole 74. Since the return air from the left refrigerator compartment 15 whose temperature is higher than that of the right refrigerator compartment 16 flows, the temperature of the independent refrigerator compartment 16b is increased. Thereby, the independent refrigerator compartment 16b can be utilized as a storage space for vegetables.

  Moreover, the partition cover 35 (refer FIG. 3) seals the upper surface opening part of the refrigerated food case 34. FIG. Thereby, the inside of the refrigerated food case 34 is prevented from evaporating moisture of the food, and becomes a more suitable space for storing vegetables. The cold air flowing through the upper part of the right refrigerator compartment 16 and the independent refrigerator compartments 16 a and 16 b returns from the outlets 72 and 73 to the low temperature side evaporator 132 through the return passage 71.

  FIG. 8 shows a configuration diagram of the cooling system 100 of the refrigerator 1. FIG. 9 is a perspective view showing the arrangement of the cooling system 100. The cooling system 100 has a Stirling refrigerator 110. The Stirling refrigerator 110 operates a reverse Stirling cycle by circulation of an internal working medium (primary refrigerant). As a result, the high temperature head 111 is held at a high temperature, and the low temperature head 112 (cooling means) is held at a low temperature.

  The Stirling refrigerator 110 is installed in a so-called vertical position in which a low-temperature head 112 is disposed below a high-temperature head 111. Thereby, since heat released upward from the high temperature head 111 does not interfere with the low temperature head 112, heat loss can be reduced.

  The cold heat generated in the low temperature head 112 is naturally circulated through the secondary refrigerant by the loop thermosyphon type low temperature side circulation circuit 130 and is transported by heat. Since the low-temperature side circulation circuit 130 is a thermosiphon type, the condensed secondary refrigerant is caused to flow down due to gravity, and a liquid refrigerant recirculation member is not required, thereby reducing costs. Further, since the air flow channel and the liquid flow channel are separated into a loop shape, the liquid flow is not returned by the air flow, and the heat transport limit can be improved. Carbon dioxide or the like is enclosed as a secondary refrigerant in the low temperature side circulation circuit 130.

  The low temperature side circulation circuit 130 includes a low temperature side condenser 131, a low temperature side evaporator 132, and a secondary refrigerant pipe 133. The low temperature side condenser 131 is thermally connected so as to transfer heat to the low temperature head 112, and condenses the secondary refrigerant by cooling the low temperature head 112.

  The low temperature side evaporator 132 has a large number of heat absorbing fins 132b mounted on a meandering pipe 132a, and is arranged in the cooling duct 50 (see FIG. 3) as described above. The low temperature side evaporator 132 exchanges heat with the air in the cooling duct 50, the secondary refrigerant evaporates, and cold air is generated. The pipe 132a and the heat-absorbing fin 132b are made of a metal material having good heat conductivity such as copper or copper alloy.

  The secondary refrigerant pipe 133 connects the low temperature side condenser 131 and the low temperature side evaporator 132, and has a liquid phase pipe 133L and a gas phase pipe 133G. In the liquid layer pipe 133L, the liquid secondary refrigerant condensed by the low temperature side condenser 131 flows down due to gravity. In the gas-phase pipe 133G, the gaseous secondary refrigerant evaporated by the low-temperature side evaporator 132 rises.

  FIG. 10 shows a perspective view of the low-temperature side condenser 131. The low temperature side condenser 131 is formed of a metal having good heat conductivity such as copper, a copper alloy, or aluminum. Thereby, the cold heat of the low-temperature head 112 can be efficiently transmitted to the refrigerant flowing through the horizontal flow path 131b and the vertical flow path 131c (both see FIG. 11) described later.

  The low temperature side condenser 131 has a hollow annular portion 131a, and the annular portion 131a is externally fitted to the low temperature head 112 and thermally connected. Thereby, heat exchange between the low temperature side condenser 131 and the low temperature head 112 can be performed efficiently. At this time, the annular portion 131 a is provided so as to protrude from the lower end of the low-temperature head 112. A gas inflow portion 131G and a liquid outflow portion 131L to which the gas phase piping 133G and the liquid layer piping 133L are connected are provided on both end faces of the annular portion 131a.

  The gas inflow portion 131G and the liquid outflow portion 131L are composed of the same piping as the secondary refrigerant piping 133. The liquid outflow portion 131L extends downward from the end of the annular portion 131a in a direction perpendicular to the circumferential direction. The gas inflow portion 131G extends upward in the direction perpendicular to the circumferential direction from the end of the annular portion 131a, and bends and extends downward. That is, the gas inflow portion 131G and the liquid outflow portion 131L extend from the end face of the annular portion 131a in a direction perpendicular to the circumferential direction (a direction in which thin tubes described later are arranged), and extend in opposite directions. Thereby, the back flow of the liquid refrigerant from the gas inflow portion 131G can be prevented.

  FIG. 11 shows a longitudinal sectional view in which the annular portion 131a of the low-temperature side condenser 131 is developed in the circumferential direction. 12 and 13 show a cross-sectional view taken along the line CC and a line BB of FIG. The gas inflow portion 131G is connected to one end surface 131d in the circumferential direction of the annular portion 131a, and the liquid outflow portion 131L is connected to the other end surface 131e.

  In the annular part 131a, a transverse flow path 131b in which a plurality of thin tubes extending in the circumferential direction are arranged in parallel is provided. The gas inflow portion 131G and the liquid outflow portion 131L communicate with each other through the horizontal flow path 131b. In addition, a vertical flow path 131c is formed in the annular portion 131a to communicate the thin tubes across the horizontal flow path 131b.

  The gas refrigerant flowing in from the gas inflow portion 131G flows through the lateral flow path 131b and is condensed by the cold heat of the low temperature head 112 to become a liquid refrigerant. The liquid refrigerant in the lateral flow path 131b is guided to the liquid outflow portion 131L. At this time, the liquid refrigerant flows down the longitudinal flow path 131c and is guided to the lower narrow tube. Thereby, the liquid refrigerant accumulated in the lower narrow tube is sequentially pushed out and guided to the liquid outflow portion 131L. Therefore, the liquid refrigerant can easily flow out from the liquid outflow portion 131L, and the heat transport efficiency of the low temperature side circulation circuit 130 can be improved.

  FIG. 14 is a development view of the low-temperature side condenser 131. The lower end of the open end of the gas inflow portion 131G is plugged with a plug 131f up to the height of the lower portion of the annular portion 131a. Thereby, the gas inflow part 131G side is shielded by the narrow tube of the lower part of the horizontal flow path 131b. Therefore, the liquid refrigerant that accumulates in the lower narrow tube is guided in the direction of the liquid outflow portion 131L, and the liquid refrigerant can flow out more smoothly.

  8 and 9, the heat generated by the high-temperature head 111 is transported by heat by naturally circulating the secondary refrigerant by the loop-type thermosiphon type high-temperature side first circulation circuit 120 as in the low-temperature side circulation circuit 130. Water, hydrocarbon-based brine, or the like is enclosed as a secondary refrigerant of the high temperature side first circulation circuit 120.

  The high temperature side first circulation circuit 120 includes a high temperature side evaporator 121, a high temperature side condenser 122, and a secondary refrigerant pipe 123. The high temperature side evaporator 121 is thermally connected so as to transfer heat to the high temperature head 111, and evaporates the secondary refrigerant by the heat of the high temperature head 111. The high temperature side evaporator 121 is formed of a metal having a good thermal conductivity such as copper, copper alloy, or aluminum in a hollow ring shape, and is fitted to the outer peripheral surface of the high temperature head 111.

  The high temperature side condenser 122 is disposed above the Stirling refrigerator 110, and the high temperature side condenser 122 is provided with a number of heat absorbing fins 122b on a meandering pipe 122a. The high-temperature side condenser 122 dissipates heat to the outside air by driving the heat dissipating fan 124 and the secondary refrigerant is condensed. The pipe 122a and the heat absorbing fins 122b are made of a metal material having good heat conductivity such as copper or a copper alloy.

  The secondary refrigerant pipe 123 connects the high temperature side evaporator 121 and the high temperature side condenser 122 and has a liquid phase pipe 123L and a gas phase pipe 123G. In the liquid layer pipe 123L, the liquid secondary refrigerant condensed by the high temperature side condenser 122 flows down due to gravity. In the gas phase pipe 123G, the gaseous secondary refrigerant evaporated by the high temperature side evaporator 121 rises.

  The high temperature side first circulation circuit 120 is connected to a high temperature side second circulation circuit 150 for preventing condensation of the heat insulating box 10. The high temperature side second circulation circuit 150 is thermally connected to the gas phase refrigerant pipe 123G of the high temperature side first circulation circuit 120 via the heat exchanger 151. Tertiary refrigerant brine is sealed in the pipe 152 of the high temperature side second circulation circuit 150 in a non-depressurized state. Tertiary refrigerant brine consists of a mixture of water and antifreeze. Brine has a low viscosity by reducing the mixing ratio of antifreeze. Thereby, the circulation amount of the brine is ensured.

  In the high temperature side second circulation circuit 150, the pipe 152 has a down pipe 152 </ b> D and an up pipe 152 </ b> U led out from the heat exchanger 151. The downcomer 152D extends downward from the heat exchanger 151 and enters a drain pan 153 disposed at the bottom of the heat insulating box 10. The pipe 152 meanders in the drain pan 153 and evaporates the drain accumulated in the drain pan 153 by raising the temperature. A drain evaporation fan 154 is disposed on the side of the drain pan 153 so as to further accelerate the evaporation of the drain.

  The pipe 152 exiting the drain pan 153 passes through the inside of the heat insulating box 10. The pipe 152 passes near the surface of the heat insulating box 10 and transfers heat obtained from the high temperature side first circulation circuit 120 via the heat exchanger 151. Thereby, the dew-proof part 160 which is maintained more than a dew point and prevents dew condensation is formed in the heat insulation box 10. The dew proof part 160 is formed on each front edge of the right side wall, left side wall, ceiling wall, bottom wall, horizontal partition wall, and vertical partition wall of the heat insulation box 10.

  As shown in FIG. 9, the dew proof part 160 is configured in two systems in which the pipe 152 is branched at the branch part 155 and joined at the junction part 156. The pipe 152 joined at the junction 156 passes through the suction tank 157 and enters the piezoelectric circulation pump 158 installed at the bottom of the heat insulating box 10. The pipe 152 exiting the circulation pump 158 passes through the discharge tank 159 and then becomes the upstream pipe 152U and returns to the heat exchanger 151. Circulation pump 158 is controlled by control unit 80.

  When the Stirling refrigerator 110 is operated, the temperature of the high temperature head 111 rises and the temperature of the low temperature head 112 falls. As a result, the high-temperature secondary refrigerant flows through the high-temperature side first circulation circuit 120, dissipates heat in the high-temperature side condenser 122, and the secondary refrigerant circulates. Further, the low-temperature secondary refrigerant flows through the low-temperature side circulation circuit 130, and heat is taken away by the low-temperature side evaporator 132 so that the secondary refrigerant circulates.

  FIG. 15 is a side view showing the machine room 45. In the machine room 45, a Stirling refrigerator 110, a high temperature side evaporator 121, a high temperature side condenser 122, a secondary refrigerant pipe 123, a heat radiation fan 124, and a low temperature side condenser 131 are accommodated. After each part is accommodated in the machine room 45, the upper surface opening and the rear surface opening are closed by the ventilation grill.

  Since the heat generating part of the cooling system 100 arranged in the machine room 45 is adjacent to the left refrigerator compartment 15 which is higher in temperature than the left freezer compartment 17 and the right freezer compartment 18, the heat insulating layer can be made thin. In addition, as described above, the left refrigerator compartment 15 is maintained at a higher temperature than the right refrigerator compartment 16, so that the heat insulating layer can be made thinner.

  The Stirling refrigerator 110 is supported by a support member 140. The support member 140 is a frame having a frame shape that is a separate member from the heat insulating box 10, and is horizontally fixed to a middle height of the machine room 45. An opening (not shown) through which the Stirling refrigerator 110 and the secondary refrigerant pipe 123 of the high-temperature side first circulation circuit 120 are passed is formed inside the support member 140.

  A flange-like mounting leg 114 is integrated on the outer surface of the power unit 113 of the Stirling refrigerator 110 by welding or the like. The mounting legs 114 are formed by sheet metal pressing or die casting. The mounting legs 114 may be formed by injection molding a high-strength synthetic resin material such as MC nylon.

  The Stirling refrigerator 110 is attached by being inserted into the opening of the support member 140 from above so that the low temperature head 112 is disposed below and the high temperature head 111 is disposed. At this time, a columnar vibration absorber 143 made of an elastic material such as rubber is provided between the support member 140 and the mounting leg 114. Thereby, the vibration of the Stirling refrigerator 110 is absorbed. The high temperature side first circulation circuit 120 is connected to the high temperature head 111 before the Stirling refrigerator 110 is attached to the support member 140.

  The high temperature side condenser 122 is supported above the Stirling refrigerator 110 by being supported by the secondary refrigerant pipe 123. A heat radiating fan 124 is connected to the lower surface of the high temperature side condenser 122 through a duct 125. The blowing direction of the heat radiating fan 124 may be a direction in which wind is blown to the high temperature side condenser 122, or may be a direction in which wind is taken in through the high temperature side condenser 122.

  Since the power unit 113 is disposed between the high temperature side evaporator 121 and the high temperature side condenser 122, a difference in height between the high temperature side evaporator 121 and the high temperature side condenser 122 can be increased. As a result, it is possible to improve the heat radiation efficiency by ensuring a level difference sufficient for natural circulation of the secondary refrigerant. Moreover, since the space between the high temperature side evaporator 121 and the high temperature side condenser 122 is used for the arrangement of the power unit 113 of the Stirling refrigerator 110, the space can be effectively used.

  In addition, a heat radiating fan 124 that forcibly air-cools the high temperature side condenser 122 is also disposed between the high temperature side evaporator 121 and the high temperature side condenser 122. Therefore, it is possible to further ensure a height difference between the high temperature side evaporator 121 and the high temperature side condenser 122.

  Further, the high temperature side condenser 122, the heat radiating fan 124, and the duct 125 are integrally attached to the Stirling refrigerator 110 by the secondary refrigerant pipe 123. For this reason, in addition to the Stirling refrigerator 110, the vibration absorber 143 also absorbs vibrations of the high-temperature side condenser 122 and the heat dissipation fan 124. Therefore, the vibration of the cooling system 100 can be further reduced.

  The low temperature side circulation circuit 130 is connected to the low temperature head 112 after the Stirling refrigerator 110 is attached to the support member 140. The low temperature side circulation circuit 130 may be connected to the low temperature head 112 when the low temperature head 112 is inserted through the opening of the support member 140.

  In addition, you may provide the heat insulating body 144 surrounding the low-temperature head 112 and the secondary refrigerant | coolant piping 133 as shown with a virtual line in the figure. The heat insulator 144 can be formed by urethane foaming inside a predetermined space. You may form the heat insulating body 144 combining several foaming urethane blocks.

  Further, when the low-temperature side evaporator 132 is biased and arranged on the side where the Stirling refrigerator 110 is disposed as viewed from the front, the secondary refrigerant pipe 133 can be easily routed. Thereby, the circulation efficiency of a secondary refrigerant improves. If the connecting portion between the secondary refrigerant pipe 133 and the low-temperature side evaporator 132 is also biased to the side where the Stirling refrigerator 110 is arranged, the secondary refrigerant pipe 133 can be more easily routed.

  The secondary refrigerant pipe 123 of the high temperature side first circulation circuit 120 extends upward from the high temperature side evaporator 121 disposed above to the high temperature side condenser 122. The secondary refrigerant pipe 133 of the low temperature side circulation circuit 130 extends downward from the low temperature side condenser 131 arranged downward to the low temperature side evaporator 132. Thereby, since it becomes a simple structure, the cooling path including the low temperature head 112 and the low temperature side circulation circuit 130 and the heat dissipation path including the high temperature head 111 and the high temperature side first circulation circuit 120 can be separated without difficulty and waste. Furthermore, piping work can be facilitated.

  According to the present embodiment, the cooling system 100 has a loop-type thermosiphon-type low-temperature side circulation circuit 130, and the low-temperature side condenser 131 of the low-temperature side circulation circuit 130 includes a horizontal flow path 131b in which a plurality of horizontal thin tubes are arranged in parallel. Since the vertical flow path 131c that communicates the narrow pipe across the horizontal flow path 131b is provided, the condensed liquid refrigerant is guided to the lower narrow pipe through the vertical flow path 131c. Thereby, the liquid refrigerant which accumulates in the lower narrow tube is pushed out in order, and the liquid refrigerant can easily flow out from the liquid outflow portion. Therefore, the efficiency of heat transport of the low temperature side circulation circuit 130 can be improved.

  Further, in the low temperature side condenser 131 of the low temperature side circulation circuit 130 of the cooling system 100, the gas inflow portion 131G extends upward from the end surface of the horizontal flow path 131b, and the liquid outflow portion 131L extends downward from the end surface of the horizontal flow path 131b. The back flow of the liquid refrigerant can be prevented.

  In addition, since the narrow pipe arranged in the lower part of the low-temperature side condenser 131 is shielded on the gas inflow portion 131G side, the liquid refrigerant accumulated in the lower narrow tube is guided in the direction of the liquid outflow portion 131L, and the liquid refrigerant flows out more smoothly. Can be made.

  Further, since the annular portion 131a is provided so as to protrude from the lower surface of the low temperature head 112, the lower thin tube through which a large amount of liquid refrigerant flows is separated from the low temperature head 112, and the cold heat of the low temperature head 112 is given to the upper thin tube. Therefore, cold heat is efficiently used for condensation, and the condensation efficiency of the low temperature side circulation circuit 130 can be improved.

  Further, since the narrow tube protruding from the lower surface of the low-temperature head 112 is shielded on the gas inflow portion 131G side, the gas refrigerant is efficiently condensed by guiding the gas refrigerant to the upper portion of the transverse flow path 131b in contact with the low-temperature head 112, and the liquid in the lower narrow tube The refrigerant is guided toward the liquid outflow portion 131L, so that the liquid refrigerant can flow out more smoothly.

  Next, the refrigerator 1 of 2nd Embodiment is demonstrated with reference to drawings. For convenience of explanation, the same reference numerals in the following drawings denote the same parts as those in the first embodiment shown in FIGS. The present embodiment is different from the first embodiment in the configuration of the low temperature side condenser 131 of the low temperature side circulation circuit 130. Other parts are the same as those in the first embodiment.

  FIG. 16 shows a perspective view of the low-temperature side condenser 131 of the present embodiment. The low temperature side condenser 131 has an annular portion 131a similar to that of the first embodiment, and is externally fitted to the low temperature head 112 and thermally connected. At this time, the annular portion 131 a is provided so as to protrude from the lower end of the low-temperature head 112.

  A gas inflow portion 131G and a liquid outflow portion 131L to which the gas phase piping 133G and the liquid layer piping 133L are connected are provided on both end faces of the annular portion 131a. The liquid outflow portion 131L extends downward from the end of the annular portion 131a in a direction perpendicular to the circumferential direction. The gas inflow portion 131G extends downward from the end of the annular portion 131a in a direction perpendicular to the circumferential direction.

  17 and 18 show a longitudinal sectional view of the annular portion 131a of the low temperature side condenser 131 developed in the circumferential direction and a development view of the low temperature side condenser 131. FIG. The gas inflow portion 131G is connected to one end surface 131d in the circumferential direction, and the liquid outflow portion 131L is connected to the other end surface 131e.

  In the annular part 131a, a transverse flow path 131b in which a plurality of thin tubes extending in the circumferential direction are arranged in parallel is provided. The gas inflow portion 131G and the liquid outflow portion 131L communicate with each other through the horizontal flow path 131b. In addition, a vertical flow path 131c is formed in the annular portion 131a to communicate the thin tubes across the horizontal flow path 131b.

  The narrow tube at the bottom of the horizontal flow path 131b is plugged with a plug 131f on the gas inflow portion 131G side, and the gas inflow portion 131G side is shielded. Therefore, the liquid refrigerant that accumulates in the lower narrow tube is guided in the direction of the liquid outflow portion 131L, and the liquid refrigerant can flow out more smoothly.

  According to this embodiment, the same effect as that of the first embodiment can be obtained.

  In the first and second embodiments, the cooling system 100 may use another cooling device instead of the Stirling refrigerator 110. For example, the low temperature head 112 may be replaced with the low temperature part of the Peltier element, and the high temperature head 111 may be replaced with the high temperature part of the Peltier element.

  According to this invention, it can utilize for the condenser which condenses a refrigerant | coolant with the cold of a cooling means. Moreover, according to this invention, it can utilize for the cooling system which heat-transports cold heat, such as a Stirling refrigerator, with a refrigerant | coolant, and the refrigerator for home use or business using the same.

The front view which shows the refrigerator of 1st Embodiment of this invention. The front view which shows the state which removed the heat insulation door of the refrigerator of 1st Embodiment of this invention. Side surface sectional drawing of the refrigerator of 1st Embodiment of this invention. Side surface sectional drawing of the refrigerator of 1st Embodiment of this invention. Top sectional drawing of the refrigerator of 1st Embodiment of this invention The front view explaining the flow of the cold air of the refrigerator of 1st Embodiment of this invention The block diagram explaining the flow of the cold air of the refrigerator of 1st Embodiment of this invention The block diagram which shows the cooling system of the refrigerator of 1st Embodiment of this invention. The perspective view which shows arrangement | positioning of the cooling system of the refrigerator of 1st Embodiment of this invention. The perspective view which shows the low temperature side condenser of the cooling system of the refrigerator of 1st Embodiment of this invention. Sectional drawing which shows the state which expand | deployed the annular part of the low temperature side condenser of the cooling system of the refrigerator of 1st Embodiment of this invention. CC sectional view of FIG. BB sectional view of FIG. The expanded view which shows the low temperature side condenser of the cooling system of the refrigerator of 1st Embodiment of this invention The side view which shows the machine room of the refrigerator of 1st Embodiment of this invention. The perspective view which shows the low temperature side condenser of the cooling system of the refrigerator of 2nd Embodiment of this invention. Sectional drawing which shows the state which expand | deployed the annular part of the low temperature side condenser of the cooling system of the refrigerator of 2nd Embodiment of this invention. The expanded view which shows the low temperature side condenser of the cooling system of the refrigerator of 2nd Embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 10 Heat insulation box 11, 14 Horizontal direction partition wall 12, 13 Vertical direction partition wall 15 Left refrigerator compartment 16 Right refrigerator compartment 17 Left freezer compartment 18 Right freezer compartment 19 Multi compartment 20, 21, 22, 23, 24 Thermal insulation door 45 Machine room 50, 51, 54, 63, 66 Cold air duct 54U Ascending passage 54D Lowering passage 59, 61 Lateral cold air duct 57, 58, 60, 62, 65, 70 Cold air outlet 100 Cooling system 110 Stirling refrigerator 111 High temperature Head 112 Low-temperature head 120 High-temperature side first circulation circuit 121 High-temperature-side evaporator 122 High-temperature-side condenser 123 Secondary refrigerant piping 124 Heat radiation fan 125 Duct 130 Low-temperature-side circulation circuit 131 Low-temperature-side condenser 131a Annular portion 131b Horizontal flow path 131c Longitudinal flow Road 131G Gas inflow part 131L Liquid outflow part 132 Low temperature side evaporator 33 secondary coolant piping 150 high temperature side second circulation circuit 151 heat exchanger 160 anti-condensation unit

Claims (11)

  In the condenser that condenses the refrigerant that circulates through the heat connected to the cooling means that is maintained at a low temperature, the gas inflow part into which the gas refrigerant flows, the liquid outflow part from which the condensed liquid refrigerant flows out, and the refrigerant circulates A plurality of tubules arranged side by side to provide communication between the gas inflow portion and the liquid outflow portion, and a vertical flow path to connect the tubules across the transverse flow passage. A condenser.   The condenser according to claim 1, wherein the horizontal channel and the vertical channel are provided inside a metal having good heat conduction.   The gas inflow portion and the liquid outflow portion are extended from the end surface of the transverse flow path in the direction in which the narrow tubes are arranged, and the gas inflow portion and the liquid outflow portion extend from the end surface of the horizontal flow path in opposite directions. The condenser according to claim 1 or 2.   A plurality of the thin tubes arranged in a vertical direction are horizontally arranged, and an entrance of the lower thin tube is shielded so that a gas does not flow into the lower thin tube in the gas inflow portion. Item 4. The condenser according to item 3.   A cooling means that is maintained at a low temperature; a condenser that is thermally connected to the cooling means and that condenses the refrigerant flowing through the interior; and an evaporator that is connected to the condenser and evaporates the refrigerant. In the cooling system in which the refrigerant that has flowed out flows and circulates by gravity and transports the cold heat of the cooling means by heat, the condenser includes a gas inflow portion into which the gas refrigerant flows in and a liquid outflow from which the condensed liquid refrigerant flows out A horizontal flow path in which a plurality of thin tubes arranged in a vertical direction and the gas inflow portion and the liquid outflow portion are in communication with each other, and a vertical flow path in which the thin tubes are communicated across the horizontal flow channel And a cooling system.   The cooling system according to claim 5, wherein the gas inflow portion extends upward from an end surface of the horizontal flow path, and the liquid outflow portion extends downward from an end surface of the horizontal flow path.   The cooling system according to claim 5 or 6, wherein the condenser protrudes from the cooling means and is attached to the cooling means.   The cooling system according to claim 7, wherein the gas inflow portion side of the narrow tube protruding from the cooling means is shielded.   The cooling system according to any one of claims 5 to 7, wherein the narrow pipe disposed in the lower part of the condenser is shielded on the gas inflow portion side.   The said cooling means consists of the low temperature part of a Stirling refrigerator, and while arrange | positioning the high temperature part above the said low temperature part, the said condenser was formed in the cyclic | annular form which contact | connects the said low temperature part. The cooling system according to any one of 9.   A refrigerator comprising the cooling system according to any one of claims 5 to 10, wherein cold air is generated by heat exchange with the evaporator.

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