JP2006336946A - Stirling cooling box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a Stirling cooling box capable of preventing dew condensation and freezing of food based upon supercooling of a refrigeration chamber, and capable of preventing dew condensation caused by a temperature difference between a cold air supply passage and the refrigeration chamber. <P>SOLUTION: The Stirling cooling box 1A is provided with a generated cold air supply passage 12 supplying the cold air generated by passing air through a Stirling refrigerating machine to the refrigeration chamber 5, and a circulation cold air supply passage 14 leading the cold air in the refrigeration chamber 5 to a refrigeration chamber 5 exterior, and supplying it again to the refrigeration chamber 5 without passing through the Stirling refrigerating machine. In the generated cold air supply passage 12, one part is extended along the refrigeration chamber 5, and it has a generated cold air blowout opening 12c facing the refrigeration chamber 5. The circulation cold air supply passage 14 is positioned between the generated cold air supply passage 12 and the refrigeration chamber 5, and it has a circulation cold air blowout opening 14c facing the refrigeration chamber 5. The refrigeration chamber 5 has in its interior, a mixing area for mixing the cold air blown out from the generated cold air blowout opening 12c, and the cold air blown out from the circulation cold air blowout opening 14c. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a Stirling refrigerator equipped with a Stirling refrigerator as a cold heat source.

  In recent years, adverse effects of CFCs on the global environment have been pointed out, and Sterling refrigerators equipped with Stirling refrigerators are attracting attention as refrigerators that do not use CFCs. This Stirling refrigerator cools the refrigerator compartment, freezer compartment, etc. in the refrigerator using the cold heat generated in the cold head of the Stirling refrigerator, and the cold air generated by the Stirling refrigerator is refrigerated by a blower fan or the like. Supplied to the room or freezer. Examples of the Stirling refrigerator having such a configuration include those disclosed in Japanese Patent Laid-Open No. 2002-62021 (Patent Document 1) and those disclosed in Japanese Patent Laid-Open No. 2004-37055 (Patent Document 2).

  On the other hand, as a conventional compressor-type refrigerator, for example, those disclosed in Japanese Patent Laid-Open No. 2001-108351 (Patent Document 3), those disclosed in Japanese Patent Laid-Open No. 2001-221554 (Patent Document 4), or The thing etc. which are disclosed by Kaihei 10-339550 gazette (patent document 5) are known. In the refrigerators disclosed in these Patent Documents 3 to 5, the inside of a cooling room represented by a refrigeration room, a vegetable room, etc. (excluding a freezing room for freezing stored food and an ice making room for making ice). The cold air is once taken out of the cooling chamber, and the taken cold air is mixed with the cold air generated in the cold heat source without passing through the cold heat source, and the mixed cold air is supplied to the cooling chamber. Yes. Thereby, overcooling in a cooling room represented by a refrigerator room or a vegetable room is prevented, and prevention of dew condensation on the wall surface of the cooling room and unintentional freezing of stored foods caused by this overcooling is achieved.

  FIG. 10 is a front view showing the structure of the cold air supply path and the flow of the cold air in the conventional refrigerator disclosed in Patent Document 3. FIG. 11 is a partial cross-sectional view in the vicinity of a blower fan for taking out cold air installed in the conventional refrigerator shown in FIG. In the conventional refrigerator disclosed in Patent Document 3, the cold air in the refrigerating room is once taken out of the refrigerating room, and the taken out cold air is mixed with the cold air generated in the cold heat source without passing through the cold heat source. And it is the structure which supplies the cold air after the mixing to a refrigerator compartment.

  As shown in FIG. 10, the refrigerator 1 </ b> F has a protruding portion 10 on the rear back surface 5 b of the refrigerator compartment 5 formed inside the outer box 2, and the protruding portion 10 has a cooling heat source inside. A cold air supply path 12 is provided for supplying the cold air generated by the communication to the refrigerator compartment 5. The cold air supply passage 12 is branched into a central passage 12a and a pair of side passages 12b by a pair of ribs 11a provided so as to extend in the vertical direction, and each of the side passages 12b is formed on a side surface of the ridge portion 10. The center passage 12a includes a cold air outlet 12d provided on the top surface of the ridge portion 10, including the provided cold air outlet 12c. A blower fan 16 is provided at the lower end of the central passage 12a, and a fan cover 18 desired for the refrigerator compartment 5 is attached to the front face of the blower fan 16. The fan cover 18 is provided with a plurality of openings 18 a so that the space in the refrigerator compartment 5 communicates with the central passage 12 a of the cold air supply passage 12 provided in the protrusion 10.

As shown in FIG. 11, in the refrigerator 1 </ b> F, by the operation of the blower fan 16, the cold air in the refrigerator compartment 5 is supplied to the central passage 12 a through the opening 18 a provided in the fan cover 18, It is produced by passing to the source and then mixed with the produced cold air passing through the cold air supply passage 12. The mixed cool air is blown out from the cool air outlet 12d to the refrigerating chamber 5 through the central passage 12a provided in the protrusion 10. Thereby, the supercooling in the refrigerator compartment 5 is prevented, and the dew condensation on the wall surface of the refrigerator compartment 5 which arises with this supercooling and the unintentional freezing of the stored food are prevented.
JP 2002-62021 A JP 2004-37055 A JP 2001-108351 A JP 2001-221554 A JP-A-10-339550

  The above-mentioned Stirling refrigerator is a cold heat source that generates cryogenic heat of about −40 ° C., and its refrigerating capacity is very high as compared with a conventional compressor type refrigerator. Therefore, when the cold air supply structure as shown in FIGS. 10 and 11 is applied to a Stirling refrigerator having a Stirling refrigerator as a cold heat source as it is, it is expected that overcooling in the cooling chamber can be prevented to some extent. Because the mixed cool air is not immediately heated to the same temperature as the cool air temperature in the cooling chamber, cooling occurs due to the temperature difference between the cool air after mixing passing through the cool air supply path and the cool air in the cooling chamber. Particularly noticeable condensation will occur on the rear back of the room. As a result, the condensed water adhering to the rear rear surface flows down through the back wall, and the condensed water that has flowed down accumulates on the bottom plate of the cooling chamber, and as a result, the air in the cooling chamber dries and adversely affects the freshness of the food. Will be given.

  Therefore, the present invention has been made to solve the above-described problems, and can prevent the formation of condensation and freezing of food based on the overcooling of the cooling chamber, and is caused by the temperature difference between the cold air supply path and the cooling chamber. An object of the present invention is to provide a Stirling refrigerator capable of preventing the occurrence of condensation.

  The refrigerator according to the present invention is a Stirling refrigerator equipped with a Stirling refrigerator, and a generated cold air supply path for supplying cold air generated by passing through the Stirling refrigerator to the cooling chamber, and cold air in the cooling chamber Is provided outside the cooling chamber, and is provided with a circulating cold air supply passage for supplying the cooling chamber again without passing through the Stirling refrigerator. The generated cold air supply passage extends at least partially along the cooling chamber, and has a generated cold air outlet provided on a wall surface defining the cooling chamber. The circulating cold air supply path extends between the generated cold air supply path and the cooling chamber so as to be parallel to the generated cold air supply path, and has a circulating cold air outlet provided on a wall surface defining the cooling chamber. Have. And the said cooling chamber has the mixing area | region which mixes the cold air blown off from the said production | generation cold air blower outlet, and the cold air blown off from the said circulating cold air blower outlet in the inside.

  With this configuration, the circulating cold air supply path provided between the generated cold air supply path and the cooling chamber functions as a heat insulating layer, so that the cryogenic generated cold air passing through the generated cold air supply path It becomes difficult for cold heat to be transmitted to the back wall that defines the cooling chamber, and it is possible to effectively prevent the occurrence of condensation on the back and rear surfaces of the cooling chamber. Therefore, drying in the cooling chamber can be prevented, and the food can be stored in a good state for a long time without impairing the freshness. In addition, the cryogenic generated cool air that passes through the generated cool air supply path is heated by the circulating cold air that passes through the circulating cool air supply path through the partition wall that partitions the generated cool air supply path and the circulating cool air supply path, Since these cold airs are positively mixed in the mixing area provided in the cooling chamber, it is possible to prevent overcooling in the cooling chamber and to prevent condensation on the wall surface of the cooling chamber and unintentional freezing of stored food. .

  In the Stirling cooler according to the present invention, it is preferable that a protrusion that protrudes toward the cooling chamber is provided on the rear rear surface of the cooling chamber that defines the cooling chamber. In addition, it is preferable that the generated cold air supply path and the circulating cold air supply path are provided inside the protrusion. And it is preferable that the said production | generation cold air blower outlet and the said circulating cold air blower outlet are provided in the side surface of the said rib part so that the side surface of the said cooling chamber which prescribes | regulates the said cooling chamber may be faced.

  By configuring in this way, the generated cold air blown out from the generated cold air outlet and the circulating cold air blown out from the circulating cold air outlet are mixed at the rear side of the cooling chamber, so the stored food is Low-temperature generated cold air is not directly blown toward the center of the cooling chamber, which is the area where it is mainly placed, and the appropriately warmed cold air after mixing can be blown onto the stored food. Unintentional freezing can be surely prevented.

  In the Stirling cooler according to the present invention, it is preferable that the ridge portion has a partition plate extending from the side end of the top surface toward the side surface of the cooling chamber. It is preferable that the mixing region is formed between the partition plate and the rear back surface of the cooling chamber.

  With this configuration, the storage area of the stored food and the mixed area of the generated cold air and the circulating cold air can be reliably separated by the partition plate in the cooling chamber, so the stored food is not intended more reliably. Freezing can be prevented.

  In the Stirling refrigerator according to the present invention, it is preferable that the partition plate has a function as a wind direction plate for cold air blown out from the circulating cold air outlet.

  By comprising in this way, since it becomes possible to guide the flow direction of the circulating cold air blown out from the circulating cold air outlet in a desired direction, the generated cold air and the circulating cold air outlet that are blown out from the generated cold air outlet It is possible to promote the mixing with the circulating cold air blown out of the cooling chamber, and it is possible to more reliably prevent the cooling chamber from being overcooled.

  In the Stirling cooler according to the present invention, it is preferable that a wind direction changing unit for changing a flow direction of the cold air blown out from the generated cold air outlet is provided on the rear rear surface of the cooling chamber. In this case, it is preferable that the wind direction changing portion is covered with the partition plate when the cooling chamber is viewed from the front.

  By configuring in this way, the wind direction changing portion is hidden by the partition plate, so that the appearance on the rear rear surface of the cooling chamber is not impaired even when the wind direction changing portion is provided on the rear rear surface of the cooling chamber.

  According to the present invention, in the Stirling refrigerator, it is possible to prevent the formation of condensation due to the overcooling of the cooling chamber and the freezing of the food, and it is also possible to prevent the occurrence of condensation due to the temperature difference between the cold air supply path and the cooling chamber. The food can be stored in a good condition for a long time without impairing the freshness.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, embodiment shown below illustrates the case where this invention is applied to what is called a Stirling refrigerator-freezer provided with a refrigerator compartment and a freezer compartment as a cooling chamber.

(Embodiment 1)
1 is a schematic front view of a Stirling cooler according to Embodiment 1 of the present invention, and FIG. 2 is a schematic longitudinal sectional view of the Stirling cooler along the line II-II shown in FIG. FIG. 3 is a front view showing the structure of the cold air supply path provided at the rear of the refrigerator compartment of the Stirling refrigerator shown in FIGS. 1 and 2 and the flow of the cold air, and FIG. 4 is taken along the line IV-IV shown in FIG. FIG. FIG. 5 is an enlarged cross-sectional view of the vicinity of the cold air outlet of the Stirling cooler shown in FIG. 4 and shows the flow of the cold air.

  First, the schematic structure of the Stirling cooler in the present embodiment will be described with reference to FIGS. 1 and 2. As shown in FIG. 1 and FIG. 2, the Stirling cooler 1A in the present embodiment includes an outer box 2 having a rectangular parallelepiped shape at the front opening, and inside the outer box 2 is a cooling chamber. A freezer compartment 3 and a refrigerator compartment 5 are provided. The heat insulation doors 6 and 7 are attached to the front surfaces of the freezer compartment 3 and the refrigerator compartment 5 so as to be able to be opened and closed so as to close the front opening of the outer box 2 described above. In the Stirling refrigerator 1 </ b> A according to the present embodiment, a container 3 a that is slidable in the freezer compartment 3 is provided in consideration of the convenience of housing the food to be stored. A free container 5a1 and a storage shelf 5a2 on which food to be stored can be placed are provided.

  Various ducts including the generated cool air supply path 12 are provided in the rear portion of the outer box 2, that is, in the space behind the freezer compartment 3 and the refrigerator compartment 5. Further, a Stirling refrigerator 100 as a cooling heat source is disposed in a predetermined region of the rear portion of the outer box 2.

  The Stirling refrigerator 100 has a worm head that generates high-temperature heat and a cold head that generates cryogenic heat. A high temperature side evaporator 102 connected to a high temperature side condenser (not shown) is attached to the worm head, and the heat is transferred to the outside by the secondary refrigerant sealed in the high temperature side condenser and the high temperature side evaporator 102. Heat is dissipated. On the other hand, the cold head is provided with a low-temperature side condenser 104 connected to the low-temperature side evaporator 110, and the cold heat is reduced by the secondary refrigerant enclosed in the low-temperature side evaporator 110 and the low-temperature side condenser 104. Heat is transferred to the air in the cold air generation unit 9 provided so as to surround the evaporator 110. The cold air generating unit 9 corresponds to one of the various ducts described above.

  The cold air generation unit 9 communicates with the generated cold air supply path 12, and communicates with the freezer compartment 3 and the refrigerator compartment 5 via the generated cold air supply path 12. A cold air inlet 3 c is provided behind the lower end of the freezer compartment 3, and the cold air inlet 3 c communicates with the cold air generator 9. On the other hand, a cool air suction port 8a is provided at the rear of the lower end of the refrigerator compartment 5, and this cool air suction port 8a is connected to the cool air generation unit 9 via the cool air recovery path 8 which is one of the various ducts described above. Communicate.

  As described above, in the Stirling cooler 1 </ b> A according to the present embodiment, the cold air cooled to the cryogenic temperature by passing through the low temperature side evaporator 110 of the Stirling refrigerator 100 in the cold air generating unit 9 is again passed through the freezer compartment 3. The freezing chamber side cold air circulation path returned to the cold air generation unit 9 and the cold air cooled to the cryogenic temperature by passing through the low temperature side evaporator 110 of the Stirling refrigerator 100 in the cold air generation unit 9 again through the refrigerating chamber 5. Two cold air circulation paths including the cold room circulation air path returned to the cold air generation unit 9 are provided in the cabinet. As a result, the cold air circulates in the two cold air circulation paths so that the freezer compartment 3 and the refrigerator compartment 5 are maintained at a predetermined temperature, and the food stored in the freezer compartment 3 and the refrigerator compartment 5 Each will be stored frozen and refrigerated. In addition, the ventilation fan 26 etc. as a ventilation means installed in the production | generation cold air supply path 12 are utilized for the circulation of the cold air in the above-mentioned cold air circulation path.

  Next, with reference to FIG. 1 thru | or FIG. 5, the specific structure of the cool air supply path provided in the rear part of the refrigerator compartment which is the characteristic part of the Stirling refrigerator in this Embodiment is demonstrated in detail. As shown in FIGS. 1 to 5, a ridge portion 10 extending in the vertical direction is provided on the rear back surface 5 b of the refrigerator compartment 5. The protruding portion 10 is constituted by a generated cold air supply path forming member 11 and a circulating cold air supply path forming member 13. The generated cold air supply path forming member 11 is attached to the rear back surface 5 b of the refrigerator compartment 5, and the circulating cold air supply path forming member 13 is arranged so as to cover the generated cold air supply path forming member 11. Installed on.

  As shown in FIGS. 2, 4, and 5, a gap having a predetermined shape and size is provided in the vertical direction between the generated cold air supply path forming member 11 and the rear back surface 5 b of the refrigerator compartment 5. The upper portion of the generated cold air supply path 12 is formed by this gap. The upper part of the generated cold air supply path 12 is a supply path for the generated cold air for supplying the cryogenic cold air generated by communicating with the Stirling refrigerator 100 to the refrigerator compartment 5. On the other hand, a gap having a predetermined shape and size is provided between the circulating cold air supply path forming member 13 and the generated cold air supply path forming member 11 in the vertical direction, and the circulating cold air supply path 14 is formed by this gap. Is formed. The circulation cold air supply path 14 is a cold air circulation path that is distinguished from the above-described two cold air circulation paths (the freezer compartment side cold air circulation path and the refrigerator compartment side cold air circulation path). This is a circulating cold air supply path for taking out the cold air from the refrigerating chamber 5 and supplying it to the refrigerating chamber 5 again without passing through the Stirling refrigerator 100.

  As shown in FIGS. 3, 4, and 5, the generated cold air supply path forming member 11 is provided with a pair of ribs 11 a extending in the vertical direction, and the pair of ribs 11 a serves as an upper portion of the generated cold air supply path 12. Is divided into a central passage 12a and a pair of side passages 12b. The lower end of the central passage 12a is connected to the generated cold air supply passage 12 where the above-described blower fan 26 is installed, and the upper end thereof is connected to the pair of side passages 12b. Generated cold air outlets 12c are provided on both side surfaces of the ridge portion 10 so as to face the side surface 5c of the refrigerator compartment 5, and the pair of side passages 12b described above are provided via these generated cold air outlets 12c. The refrigerator compartment 5 communicates.

  A blower fan 16 is provided at the lower end of the circulating cold air supply path 14, and a fan cover 18 desired for the refrigerator compartment 5 is attached to a portion of the circulating cold air supply path forming member 13 located in front of the blower fan 16. ing. The fan cover 18 is provided with a plurality of openings 18 a, whereby the space in the refrigerator compartment 5 communicates with the circulating cold air supply path 14 provided in the protrusion 10. Circulating cold air outlets 14c are provided on both side surfaces of the ridge portion 10 so as to face the side surfaces 5c of the refrigerator compartment 5, and the circulating cold air supply passage 14 and the refrigerator compartment 5 are provided via the circulating cold air outlets 14c. And communicate with each other.

  As shown in FIG. 4 and FIG. 5, the flow direction of the generated cold air blown out from the generated cold air outlet 12 c is on the rear back surface 5 b of the refrigerator compartment 5 where the generated cold air outlet 12 c is desired outside the protruding portion 10. A wind direction changing portion 13c is provided for changing. Specifically, the rear end portion of the side surface of the circulating cold air supply path forming member 13 forming the protrusion 10 is folded back so as to be substantially parallel to the rear back surface 5b of the refrigerator compartment 5, and the tip portion is further in the refrigerator compartment. As it approaches the side surface 5c of 5, it gradually protrudes so as to protrude forward.

  The characteristic configuration described above is summarized as follows. The generated cold air supply path 12 formed in the protruding portion 10 by the generated cold air supply path forming member 11 and the rear back surface 5 b of the refrigerator compartment 5 extends along the refrigerator compartment 5 and defines the refrigerator compartment 5. The generated cold air outlet 12c is provided on the wall surface. The circulating cold air supply path 14 formed in the protrusion 10 by the circulating cold air supply path forming member 13 and the generated cold air supply path forming member 11 is generated between the generated cold air supply path 12 and the refrigerator compartment 5. It has a circulating cold air outlet 14c that extends in parallel with the supply path 12 and is provided on the wall surface that defines the refrigerator compartment 5. And the production | generation cold air blower outlet 12c and the circulating cold air blower outlet 14c are provided in the both sides | surfaces of the protrusion part 10 so that the side surface 5c of the refrigerator compartment 5 which prescribes | regulates the refrigerator compartment 5 may be faced. A wind direction changing unit 13c that changes the flow direction of the generated cold air blown out from the generated cold air outlet 12c is provided on the rear rear surface of the refrigerator compartment 5.

  Next, the flow of cold air when the cold air supply path is configured as described above will be described with reference to FIGS. As shown in FIG. 3, the generated cold air cooled to a very low temperature by passing through the low temperature side evaporator 110 of the Stirling refrigerator 100 is conveyed upward in the generated cold air supply path 12 by the action of the blower fan 26. The The generated cold air that has passed through the generated cold air supply path 12 in the portion where the blower fan 26 is installed enters the ridge portion 10, rises in the central passage 12 a, and reaches the upper portion of the ridge portion 10. The generated cold air that has reached the top of the ridge 10 is diverted to the side passage 12b and descends in the side passage 12b. At this time, as shown in FIGS. 3 and 5, the generated cold air is discharged into the space in the refrigerator compartment 5 through the generated cold air outlet 12 c provided on the side surface of the protrusion 10.

  On the other hand, as shown in FIG. 3, the circulating cold air that has entered the circulating cold air supply path 14 formed in the protrusion 10 by the action of the blower fan 16 is conveyed upward in the circulating cold air supply path 14. The At this time, as shown in FIG. 3 and FIG. 5, the circulating cold air is discharged into the space in the refrigerating chamber 5 through the circulating cold air outlet 14 c provided on the side surface of the protrusion 10.

  As shown in FIGS. 3 and 5, the generated cold air blown out from the generated cold air outlet 12 c and the circulating cold air blown out from the circulating cold air outlet 14 c are mixed in a region on the side of the protrusion 10. . In FIG. 5, a region where the generated cold air and the circulating cold air are mixed is schematically shown as a mixed region A. In the present embodiment, since the air direction changing portion 13c is provided on the rear rear surface of the refrigerator compartment 5, the generated cold air blown out from the generated cold air outlet 12c is positively mixed with the circulating cold air in the mixing region A. It will be. The cold air after mixing proceeds toward the side surface 5 c of the refrigerator compartment 5 and diffuses into the refrigerator compartment 5. A part of the cold air after the diffusion is taken out from the cold air inlet 8a to the outside of the refrigerating chamber 5 and sent to the cold air generation unit 9, and the other part of the cold air after the diffusion is a blower fan. 16 is sucked into the circulating cold air supply path 14.

  In the Stirling cooler 1A that employs the configuration of the cold air supply path as described above, the circulating cold air supply path 14 is provided by the existence of the circulating cold air supply path 14 provided between the generated cold air supply path 12 and the refrigerator compartment 5. Since it functions as a heat insulation layer, the cold heat of the cryogenic generated cold air that passes through the generated cold air supply path 12 becomes difficult to be transmitted to the back wall that defines the refrigerator compartment 5, and the occurrence of condensation on the rear back surface 5b of the refrigerator compartment 5 is effective. Is prevented. Therefore, drying in the refrigerator compartment 5 can be prevented, and the food can be stored in a good state for a long time without impairing the freshness.

  Further, the cryogenic generated cold air passing through the generated cold air supply path 12 is circulated through the generated cold air supply path forming member 11 serving as a partition partitioning the generated cold air supply path 12 and the circulating cold air supply path 14. 14 is heated by the circulating cold air passing through the refrigerant 14, so that the extremely low-temperature generated cold air is gradually heated when passing through the generated cold air supply passage 12, and approaches the cold air temperature in the refrigerator compartment 5. . Further, the generated cold air and the circulating cold air blown into the refrigerator compartment 5 are positively mixed in the mixing region provided in the refrigerator compartment 5. For this reason, when the cold air blown into the refrigerator compartment 5 diffuses and reaches the periphery of the food stored in the refrigerator compartment, the cold air temperature is heated to a suitable temperature. Cooling can be prevented. Accordingly, it is possible to prevent condensation on the wall surface of the refrigerator compartment 5 and unintentional freezing of stored food.

  The generated cold air supply path forming member 11 described above is preferably formed of, for example, a resin member or a metal member. In the case where the generated cold air supply path forming member 11 is formed of a resin member, the heat insulating effect is more enhanced, and when the generated cold air supply path forming member 11 is formed of a metal member. The heat exchange between the generated cold air and the circulating cold air is promoted. In addition, when forming the production | generation cold-air supply path formation member 11 with a metal member, in order to prevent the corrosion by condensation, it is desirable to employ | adopt aluminum alloy and stainless steel alloy with a high rust prevention effect.

  On the other hand, it is preferable that the circulating cold air supply path forming member 13 described above is formed of a resin member. By comprising in this way, a high heat insulation effect comes to be acquired, and generation | occurrence | production of the dew condensation in the back back surface 5b of the refrigerator compartment 5 can be prevented.

(Embodiment 2)
FIG. 6 is an enlarged cross-sectional view of the vicinity of the cold air outlet of the Stirling cooler according to the second embodiment of the present invention, and is a diagram showing the flow of the cold air. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the Stirling refrigerator in the above-mentioned Embodiment 1, and the description is not repeated here.

  As shown in FIG. 6, the Stirling cooler 1B according to the second embodiment of the present invention has a configuration of a cold air supply path that is substantially the same as the Stirling cooler 1A according to the first embodiment described above. In the part 10, the structure is different in that the generated cold air supply path 12 and the circulating cold air supply path 14 are partially in communication. Specifically, openings 11b are provided at both end portions of the generated cold air supply path forming member 11, and both side passages 12b of the generated cold air supply path 12 and the circulating cold air supply path 14 are connected via the openings 11b. Communicate.

  With this configuration, in the Stirling cooler 1B according to the present embodiment, the protruding portion 10 of the side passage 12b is provided separately from the mixed region A of the generated cold air and the circulating cold air provided in the refrigerating chamber 5. A mixing region B in which the generated cold air and the circulating cold air are mixed is provided in the inner outer portion, so that the generated cold air and the circulating cold air are more reliably mixed. Therefore, it is possible to warm the generated cold air more reliably, and therefore, overcooling in the refrigerator compartment 5 can be prevented. Therefore, the occurrence of condensation on the wall surface of the refrigerator compartment 5 and the unintentional freezing of stored food can be prevented more reliably.

(Embodiment 3)
FIG. 7 is an enlarged cross-sectional view of the vicinity of the cold air outlet of the Stirling cooler according to Embodiment 3 of the present invention, and is a diagram showing the flow of the cold air. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the Stirling refrigerator in the above-mentioned Embodiment 1, and the description is not repeated here.

  As shown in FIG. 7, the Stirling cooler 1 </ b> C according to the third embodiment of the present invention has substantially the same configuration as the Stirling cooler 1 </ b> A according to the first embodiment described above. The configuration is different in the shape of the side portion. Specifically, the side end of the top surface 13a of the circulating cold air supply path forming member 13 extends toward the side surface of the refrigerator compartment 5, and a partition plate 13b is formed at the extended portion. . By this partition plate 13b, the space in the refrigerator compartment 5 is partitioned in the front-rear direction, and a mixed region A is formed between the partition plate 13b and the rear back surface 5b of the refrigerator compartment 5. Moreover, the partition plate 13b is formed so that the wind direction change part 13c provided in the rear back surface 5b of the refrigerator compartment 5 may be covered when the refrigerator compartment 5 is seen from the front.

  With this configuration, in the Stirling cooler 1C according to the present embodiment, the circulating cold air blown from the circulating cold air outlet 14c toward the refrigerator compartment 5 proceeds along the back surface of the partition plate 13b. Therefore, the generated cold air blown from the generated cold air outlet 12c and mixed with the generated cold air whose wind direction has been changed so as to proceed obliquely forward by the air direction changing unit 13c is more reliably mixed. Accordingly, since the generated cold air can be more reliably heated, overcooling in the refrigerator compartment 5 can be surely prevented, and condensation on the wall surface of the refrigerator compartment 5 and unintentional freezing of stored food can be more reliably performed. Can be prevented. Moreover, since the wind direction change part 13c is blindfolded by the partition plate 13b, the appearance in the rear back surface 5b of the refrigerator compartment 5 is not impaired.

(Embodiment 4)
FIG. 8 is an enlarged cross-sectional view of the vicinity of the cold air outlet of the Stirling cooler according to the fourth embodiment of the present invention, and is a diagram showing the flow of the cold air. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the Stirling refrigerator in the above-mentioned Embodiment 3, and the description is not repeated here.

  As shown in FIG. 8, the Stirling cooler 1D according to the fourth embodiment of the present invention has substantially the same configuration as the Stirling cooler 1C according to the third embodiment described above, but the rear surface of the partition plate 13b. The configuration differs in shape. Specifically, a protrusion 13d is formed on the back surface of the partition plate 13b, and the air flow direction of the circulating cold air blown from the circulating cold air outlet 14c is changed obliquely rearward by the protrusion 13d. Yes.

  By configuring in this manner, in the Stirling cooler 1D according to the present embodiment, the circulating cold air blown out from the circulating cold air outlet 14c toward the refrigerating chamber 5 proceeds along the back surface of the partition plate 13b. Since the wind direction is partially changed obliquely rearward by 13d, it is more reliably mixed with the generated cold air that has been blown out from the generated cold air outlet 12c and has been changed in the wind direction so as to advance diagonally forward by the air direction changing unit 13c. Become. Accordingly, since the generated cold air can be more reliably heated, overcooling in the refrigerator compartment 5 can be surely prevented, and condensation on the wall surface of the refrigerator compartment 5 and unintentional freezing of stored food can be more reliably performed. Can be prevented.

(Embodiment 5)
FIG. 9 is an enlarged cross-sectional view of the vicinity of the cold air outlet of the Stirling cooler according to the fifth embodiment of the present invention, and shows the flow of the cold air. In addition, the same code | symbol is attached | subjected in the figure about the part similar to the Stirling refrigerator in the above-mentioned Embodiment 3, and the description is not repeated here.

  As shown in FIG. 9, the Stirling cooler 1E according to the fifth embodiment of the present invention has substantially the same configuration as the Stirling cooler 1C according to the third embodiment described above, but in the shape of the partition plate 13b. The configuration is different. Specifically, the circulating cold air supply passage forming member 13 is finished by bending so that a space is formed inside the partition plate 13b, and the circulating cold air outlet 14c is provided on the surface located on the rear side of the partition plate 13b. Is provided.

  By configuring in this way, in the Stirling cooler 1E in the present embodiment, the circulating cold air blown from the circulating cold air outlet 14c toward the refrigerator compartment 5 is blown obliquely backward. Then, the generated cold air blown out from the generated cold air outlet 12c and mixed with the generated cold air whose direction of wind has been changed so as to proceed obliquely forward by the air direction changing unit 13c is more reliably mixed. Accordingly, since the generated cold air can be more reliably heated, overcooling in the refrigerator compartment 5 can be surely prevented, and condensation on the wall surface of the refrigerator compartment 5 and unintentional freezing of stored food can be more reliably performed. Can be prevented.

  In the Stirling refrigerators 1A to 1E according to Embodiments 1 to 5 of the present invention exemplified above, the case where the generated cold air supplied to the refrigerator compartment is mixed with the circulating cold air in the refrigerator compartment is described as an example. However, the present invention is not limited to such an application example. Examples of the cooling chamber to which the configuration of the cold air supply path as in the present invention can be applied include all cooling chambers provided in the refrigerator such as a vegetable room, a chilled room, an ice making room, and a freezing room. In Stirling refrigerators, the refrigeration performance of Stirling refrigerators is extremely high, so it can be applied to freezer rooms intended for freezing stored foods and ice making rooms intended for ice making. Because it is.

  Thus, the above-described embodiments disclosed herein are illustrative in all respects and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a schematic front view of the Stirling refrigerator in Embodiment 1 of this invention. It is a schematic longitudinal cross-sectional view along the II-II line | wire shown in FIG. 1 of the Stirling refrigerator in Embodiment 1 of this invention. It is a front view which shows the structure of the cold air supply path provided in the refrigerator compartment back of the Stirling refrigerator in Embodiment 1 of this invention, and the flow of cold air. It is a schematic cross-sectional view along the IV-IV line shown in FIG. 3 of the Stirling refrigerator in Embodiment 1 of this invention. It is an expanded sectional view of the vicinity of the cold air outlet shown in FIG. 4 of the Stirling cooler in Embodiment 1 of this invention, and is a figure which shows the flow of cold air. It is an expanded sectional view near the cold air outlet of the Stirling refrigerator in Embodiment 2 of this invention, and is a figure which shows the flow of cold air. It is an expanded sectional view near the cold air outlet of the Stirling refrigerator in Embodiment 3 of this invention, and is a figure which shows the flow of cold air. It is an expanded sectional view near the cold air outlet of the Stirling refrigerator in Embodiment 4 of this invention, and is a figure which shows the flow of cold air. It is an expanded sectional view near the cold air outlet of the Stirling refrigerator in Embodiment 5 of this invention, and is a figure which shows the flow of cold air. It is a front view which shows the structure of the cold air supply path of the refrigerator in a prior art example, and the flow of cold air. It is a fragmentary sectional view of the ventilation fan vicinity for the cold air extraction installed in the refrigerator shown in FIG.

Explanation of symbols

  1A to 1E Stirling cooler, 2 outer box, 3 freezer compartment, 3a container, 3c cold air inlet, 5 refrigerator compartment, 5a1 container, 5a2 storage shelf, 5b rear back surface, 5c side surface, 6,7 heat insulating door, 8 Cold air recovery path, 8a Cold air inlet, 9 Cold air generating part, 10 ridge, 11 Generated cold air supply path forming member, 11a Rib, 11b Opening part, 12 Generated cold air supply path, 12a Central path, 12b Side path, 12c Generated cold air outlet, 13 Circulating cold air supply passage forming member, 13a Top surface, 13b Partition plate, 13c Air direction changing portion, 13d Projection portion, 14 Circulating cold air supply passage, 14c Circulating cold air outlet, 16 Blower fan, 18 Fan cover, 18a opening, 26 blower fan, 100 Stirling refrigerator, 102 high temperature side evaporator, 104 low temperature side condenser, 110 low temperature side evaporator, A B mixed region.

Claims (5)

A refrigerator equipped with a Stirling refrigerator,
A generated cold air supply path for supplying cold air generated by communicating with the Stirling refrigerator to the cooling chamber;
A cooling air supply passage for taking out the cold air in the cooling chamber out of the cooling chamber and supplying the cooling chamber again without passing through the Stirling refrigerator,
The generated cold air supply path has a generated cold air outlet provided at a wall surface extending at least partially along the cooling chamber and defining the cooling chamber;
The circulating cold air supply path has a circulating cold air outlet provided between the generated cold air supply path and the cooling chamber so as to be parallel to the generated cold air supply path and provided on a wall surface defining the cooling chamber. And
The said cooling chamber is a Stirling refrigerator which has the mixing area | region which mixes the cold which was blown off from the said production | generation cold-air outlet, and the cold which was blown off from the said circulating cold-air outlet. On the rear rear surface of the cooling chamber that defines the cooling chamber, a protrusion that protrudes toward the cooling chamber is provided,
Inside the protrusion, the generated cold air supply path and the circulating cold air supply path are provided,
2. The Stirling cooling according to claim 1, wherein the generated cold air outlet and the circulating cold air outlet are provided on a side surface of the protruding portion so as to face a side surface of the cooling chamber defining the cooling chamber. Warehouse. The protruding portion has a partition plate extending from a side end of the top surface toward a side surface of the cooling chamber,
The Stirling cooler according to claim 2, wherein the mixing region is formed between the partition plate and a rear back surface of the cooling chamber.   The Stirling cooler according to claim 3, wherein the partition plate has a function as a wind direction plate for cold air blown out from the circulating cold air outlet. A wind direction changing unit for changing a flow direction of the cold air blown from the generated cold air outlet is provided on the rear rear surface of the cooling chamber,
The Stirling cooler according to claim 3 or 4, wherein the wind direction changing unit is covered with the partition plate when the cooling chamber is viewed from the front.

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