JP2006046759A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator never causing amplification of vibration or noise by firmly supporting a Stirling freezer without distortion at the time of mounting. <P>SOLUTION: This refrigerator 1 comprises a main body formed of a heat-insulating casing 10. A machine chamber 40 is formed on the back part of the casing 10, and the Stirling freezer 50 is stored therein. Part of the weight of the Stirling freezer 50 is supported by a heat insulating material 12 of the casing 10. Reinforcing members 16 raised from a base part 15 of the casing 10 are provided on the rear angle parts of the left and right side walls of the casing 10, and a beam 17 supporting the machine chamber 40 from under is provided between the left and right reinforcing members 16. The machine chamber 40 is formed in a rectangular parallelepiped opened at the casing back side by continuously providing an upper wall, a front wall, a bottom wall and left and right sidewalls, and a reinforcing member 42 is provided between front angle parts of the bottom wall so as to extend in the lateral direction thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a refrigerator that cools the inside of a refrigerator with a Stirling refrigerator. “Refrigerator” is a concept that refers to all devices that lower the temperature of an enclosed space called “inside” for the preservation of food and other items. Products such as “refrigerator”, “freezer”, and “refrigerator” It doesn't matter the name.

  Specific chlorofluorocarbons (CFC: chlorofluorocarbon) and alternative chlorofluorocarbons (HCFC: hydrochlorofluorocarbon, HFC: hydrofluorocarbon) are used as refrigerants in the refrigeration cycle of the refrigerator. Among these refrigerants, CFCs and HCFCs are subject to international regulations for their production and use because they are, to some extent, lead to the destruction of the ozone layer. Another problem is that HFCs that do not destroy the ozone layer also have a significant contribution to global warming.

Therefore, Stirling refrigerators that do not use ozone-depleting substances as a refrigerant are in the spotlight. The Stirling refrigerator uses an inert gas such as helium as the refrigerant, and the piston and displacer are operated by external power to repeatedly compress and expand the refrigerant, thereby increasing the temperature of the high temperature part (warm head) and the low temperature part (cold head). ). Then, heat is radiated to the surrounding environment at the high temperature part, and heat is absorbed from the inside at the low temperature part. An example of a refrigerator using a Stirling refrigerator can be seen in Patent Document 1. Patent Document 2 describes a refrigerator provided with a plurality of Stirling refrigerators.
JP-A-3-36468 (page 3-5, FIG. 1) JP 2000-130875 A (page 3-5, FIG. 1-10)

  Neither Patent Documents 1 and 2 disclose a structure that can be linked to industrial mass production in terms of how a Stirling refrigerator is attached to a heat-insulating housing that constitutes a refrigerator main body. It merely shows the concept of placing a Stirling refrigerator in the wall of a heat insulating housing.

  The present invention has been made in view of the above points, and is a structure that can be industrially mass-produced in a refrigerator that cools the interior by a Stirling refrigerator, and the Stirling refrigerator is firmly supported, An object is to provide a refrigerator in which vibration and noise are not amplified.

  In order to solve the above problems, in the present invention, the refrigerator is configured as follows.

  (1) In a refrigerator that cools the interior with a Stirling refrigerator, a machine room that houses the Stirling refrigerator is formed on the back surface of the heat insulating casing constituting the refrigerator body, and a part of the weight of the Stirling refrigerator Is supported by the heat insulating material of the heat insulating casing.

  According to this configuration, since the machine room is formed on the back surface portion of the heat insulating casing and the Stirling refrigerator is accommodated therein, it is easy to incorporate the Stirling refrigerator in the heat insulating casing on the mass production line. In addition, since a part of the weight of the Stirling refrigerator is supported by the heat insulating material of the heat insulating housing, the weight burden applied to the members constituting the machine room is reduced accordingly, and the machine room constituent members are distorted. This can prevent unauthorized installation. And since a heat insulating material absorbs the vibration and sound which a Stirling refrigerator emits, it is suppressed that a vibration and a sound are amplified and transmitted outside a refrigerator.

  (2) In a refrigerator that cools the interior with a Stirling refrigerator, a machine room that houses the Stirling refrigerator is provided on the back surface of the heat insulating casing that constitutes the main body of the refrigerator. A reinforcing member that rises from the base portion of the heat insulating casing is provided at the corner, and a beam that supports the machine room from below is provided between the left and right reinforcing members.

  According to this configuration, the strength of the heat insulating casing is improved, and the machine room is also supported to withstand the weight of the Stirling refrigerator.

  (3) In the refrigerator having the above-described configuration, the machine room forms a rectangular parallelepiped in which the top wall, the front wall, the bottom wall, and the left and right side walls are connected to each other and the back side of the heat insulating housing is open. A reinforcing member extending in the left-right direction is provided at the corner.

  According to this configuration, the front corner of the bottom wall of the machine room, that is, the corner at the back when viewed from the opening on the back side is reinforced (the reinforcing member also serves as a screw-tightening tap plate), and the Stirling refrigerator is attached. By screwing the indication base to the reinforcing member, a heavy Stirling refrigerator can be firmly supported.

  (4) In a refrigerator that cools the interior with a Stirling refrigerator, a machine room that houses the Stirling refrigerator is provided on the back surface of the heat insulating casing that constitutes the main body of the refrigerator. A reinforcing member that rises from the base portion of the heat insulating housing is provided at the corner, and a beam that supports the machine room from below is provided between the left and right reinforcing members. The machine room includes an upper surface wall, a front side wall, and a bottom surface. It is assumed that a rectangular parallelepiped having a wall and left and right side walls connected to each other and having an opening on the back side of the heat insulating casing is formed, and the front corner portion of the bottom wall is reinforced by the beam.

  According to this configuration, the strength of the heat insulating casing is improved, and the machine room is also supported to withstand the weight of the Stirling refrigerator. Also, the beam that supports the machine room from the bottom also plays the role of reinforcing the front corner of the bottom wall of the machine room (and the role of the screw-tightening tap plate), so the Stirling refrigerator was installed near the front of the machine room This can be supported firmly, and the cost can be reduced by integrating the beam and the reinforcing member.

  (5) A cooler that cools the interior with a Stirling refrigerator, and a machine room for housing the Stirling refrigerator is provided on the back surface of the heat insulating casing that constitutes the main body of the refrigerator. An air cooling duct configured to discharge heat generated by the Stirling refrigerator is integrally formed.

  According to this configuration, the entire configuration is simplified and the cost can be reduced by integrally molding the air cooling duct using the machine room as a resin molded part. And by integral molding, the seam between the air cooling duct and the machine room can be eliminated, and air leakage from this point can be prevented.

  According to the present invention, the operation of incorporating a heavy Stirling refrigerator into a heat insulating casing can be performed on a mass production line. In addition, the mounting strength of the Stirling refrigerator can be ensured, and the refrigerator can sufficiently withstand vibration and dropping during transportation. In addition, it is possible to suppress vibrations and sounds generated by the Stirling refrigerator.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 is a vertical sectional view of the refrigerator, FIG. 2 is a schematic configuration diagram of the cooling cycle, FIG. 3 is an explanatory diagram of how the secondary refrigerant flows, FIG. 4 is a rear perspective view of the refrigerator, and FIG. FIG. 6 is a perspective view of a Stirling refrigerator, FIG. 7 is a perspective view of a machine room, FIG. 8 is a partially enlarged sectional view, and FIG. 9 is a perspective view of a modified beam.

  The refrigerator 1 is for food preservation, and the heat insulating housing 10 constitutes the main body. The interior of the heat insulating housing 10 is partitioned into two upper and lower stages by a horizontal partition wall 11, and the upper stage is set as a refrigerator compartment 20 and a thawing room 25, and the lower stage is set as a freezer compartment 30. The front (left side in FIG. 1) of the refrigerator compartment 20, the thawing compartment 25, and the freezer compartment 30 is an opening for taking in and out food, and the heat insulating doors 21 and 31 are closed.

  A plurality of shelf boards 22 are provided inside the refrigerator compartment 20. Adjacent to the lowermost part of the refrigerator compartment 20 is a thawing chamber 25 having a heat insulating structure. The thawing chamber 25 shares a heat insulating door 21 with the refrigerator compartment 20 and also has a unique heat insulating door 26.

  A total of four freezing containers 32a, 32b, 32c, 32d are stored in the freezer compartment 30 so as to overlap each other. The freezing containers 32a, 32b, 32c, and 32d are respectively supported on the inner surface of the freezing chamber 14 by the side edges, and can be pulled out by sliding forward.

  A machine room 40 is formed in the center of the back surface of the heat insulating housing 10, and a Stirling refrigerator 50 is accommodated therein. A method for forming the machine room 40 and a method for installing the Stirling refrigerator 50 will be described in detail later.

A part of the Stirling refrigerator 50 becomes a low temperature part 51, and a low temperature side condenser 61 is attached thereto (see FIG. 2). A low temperature side evaporator 62 is installed in the back of the freezer compartment 30. The low temperature side condenser 61 and the low temperature side evaporator 62 are connected by a secondary refrigerant pipe, and constitute a low temperature side secondary refrigerant circulation circuit 60. The secondary refrigerant circulation circuit 60 is filled with a natural refrigerant such as CO ₂ . The low temperature side condenser 61 has a shape in which the hollow ring is divided into two, and the inside of each half of the ring is a condensing chamber 61a independent of each other (see FIG. 3).

  The other part of the Stirling refrigerator 50 becomes a high temperature section 52, and a high temperature side evaporator 71 is attached thereto (see FIG. 2). A high temperature side condenser 72 is installed on the Stirling refrigerator 50. The high temperature side evaporator 71 and the high temperature side condenser 72 are connected by a secondary refrigerant pipe to constitute a high temperature side secondary refrigerant circulation circuit 70. The secondary refrigerant circulation circuit 70 is sealed with water (including an aqueous solution) or a hydrocarbon refrigerant. The high temperature side evaporator 71 is also formed by dividing the hollow ring into two, and the inside of each half of the ring is an evaporation chamber 71a independent of each other (see FIG. 3).

  The low-temperature side evaporator 62 has a structure in which a pipe made of a metal having good heat conductivity such as copper, copper alloy, or aluminum is bent zigzag, and a large number of heat absorbing fins 63 made of a metal also having good heat conductivity are attached thereto. Similarly, the high-temperature side condenser 72 has a structure in which a large number of heat absorbing fins 73 made of a metal having good heat conductivity are attached after bending a pipe made of a metal having good heat conduction such as copper, copper alloy, or aluminum.

  As shown in FIG. 3, the outgoing side secondary refrigerant piping 64 is led out from the two condensation chambers 61 a of the low temperature side condenser 61. The two outgoing side secondary refrigerant pipes 64 merge outside the low temperature side condenser 61 and are connected to the low temperature side evaporator 62 as one pipe. The return side secondary refrigerant pipe 65 returns from the low temperature side evaporator 62. This return side secondary refrigerant pipe 65 also branches before the low temperature side condenser 61 to form two pipes. One by one is connected to the condensing chamber 61a.

  Similarly, in the high-temperature side evaporator 71, the forward-side secondary refrigerant pipe 74 is led out from each of the two evaporation chambers 71 a, and these two forward-side secondary refrigerant pipes 74 join outside the high-temperature side evaporator 71. And it is connected to the high temperature side condenser 72 as one pipe. The return side secondary refrigerant pipe 75 returns from the high temperature side condenser 72, and this return side secondary refrigerant pipe 75 also branches in front of the high temperature side evaporator 71 to form two pipes. One by one is connected to the evaporation chamber 71a.

  Cooling ducts 80 and 81 extending in the vertical direction along the inner wall on the back side are provided inside the heat insulating housing 10. The cooling duct 80 is located on the back side, and the cooling duct 81 is located on the near side thereof. The cooling duct 80 ends at a height up to the middle of the freezer compartment 30, but the duct 81 continues to the ceiling of the refrigerator compartment 20.

  At the lower end of the cooling duct 80, an air inlet 82 for sucking the internal air from the freezer compartment 30 is provided. A low-temperature side evaporator 62 is installed above the intake port 82, and a blower 83 that blows out air to the cooling duct 81 is further provided above the low-temperature side evaporator 62.

  Although not shown, a return duct for collecting air from the refrigerator compartment 20 and the thawing compartment 25 is also provided in the heat insulating casing 10. The return duct has a blower outlet at a position facing the low temperature side evaporator 62, and supplies the recovered air to the low temperature side evaporator 62.

  When the Stirling refrigerator 50 is operated, the low temperature part 51 becomes low temperature and the high temperature part 52 becomes high temperature. The cold heat of the low temperature part 51 is transmitted to the low temperature side evaporator 62 through the secondary refrigerant circulation circuit 60. The heat of the high temperature section 52 is transmitted to the high temperature side condenser 72 via the secondary refrigerant circulation circuit 70.

  When the blower 83 is operated here, air in the freezer compartment 30 is sucked from the inlet 82 at the lower end of the cooling duct 80 and passes through the low-temperature side evaporator 62. Further, the air in the refrigerator compartment 20 and the thawing compartment 25 is sucked into the cooling duct 80 through the return duct (not shown), and also passes through the low temperature side evaporator 62. The air passing through the low temperature side evaporator 62 is cooled and becomes cold.

  The cold air is blown into the cooling duct 81 by the blower 83, and enters the refrigerating chamber 20 through the air outlet 84 provided in the upper part of the duct 81 (the part above the horizontal partition wall 11) and the lower part of the cooling duct 81 (the horizontal partition). Each is sent into the freezer compartment 30 through the outlet 85 provided in the part below the wall 11. Cold air is fed into the thawing chamber 25 through the damper 86 shown in FIG. In this way, a predetermined amount of cold air is sent to the refrigerator compartment 20, the thawing chamber 25, and the freezer compartment 30, respectively, and the refrigerator compartment 20, the thawing compartment 25, and the freezer compartment 30 are each cooled to a predetermined temperature. A control unit (not shown) controls the operation control.

  Although the secondary refrigerant circulation circuit 70 on the high temperature side is sufficiently circulated only by natural circulation, the secondary refrigerant circulation circuit 60 on the low temperature side may not obtain the necessary circulation only by natural circulation. In such a case, a circulation pump is disposed in the secondary refrigerant circulation circuit 60 to perform forced circulation.

  Then, the formation method of the machine room 40 and the installation method of the Stirling refrigerator 50 are demonstrated.

  Initially, the structure of the heat insulation housing | casing 10 is demonstrated. As seen in FIG. 5, the heat insulating housing 10 includes an outer box 10a, an inner box 10b, and a back plate 10c. After these are assembled to form a hollow housing, the hollow portion is filled with the heat insulating material 12 (see FIG. 1). As the heat insulating material 12, for example, polyurethane foam can be used.

  FIG. 5 shows a state before the foam heat insulating material 12 is filled. In the inner box 10 b, a recess 13 is formed at an intermediate height between the refrigerator compartment 20 and the freezer compartment 30 and opens toward the back side of the heat insulating housing 10. A window 14 is formed in the back plate 10 c at a position corresponding to the recess 13. The machine room 40 is inserted into the recess 13 through the window 14.

  FIG. 7 shows the structure of the machine room 40. The machine room 40 is a rectangular parallelepiped structure configured by combining sheet metal parts. As the parts, there are a side-shaped U-shaped part 40a in which a top wall, a front wall, and a bottom wall are integrally connected, and a rectangular part 40b that constitutes a left side wall and a right side wall. Two parts 40b are connected to the part 40a by spot welding to form a rectangular parallelepiped in which the back side of the heat insulating casing 10 is opened. A flange portion 41 is formed around the opening, and the machine room 40 is attached to the heat insulating casing 10 by screwing a screw (not shown) into the back plate 10c through a through hole 42 formed in the flange portion 41.

  Since the Stirling refrigerator 50 has a considerable weight, the filled foam insulation 12 supports a part of the weight of the Stirling refrigerator 50 so that the machine room 40 can withstand it.

  First, the heat insulating material 12 is pressed against at least the lower surface of the machine room 40. The heat insulating material 12 may be in direct contact with the outer surface of the machine room 40 or may be indirectly pressed through the outer shell of the heat insulating housing 10. It is assumed that the heat insulating material 12 supports a part of the weight of the Stirling refrigerator 50.

  The machine room 40 itself is also reinforced. As seen in FIG. 7, a reinforcing member 43 extending in the left-right direction is provided at the front corner of the bottom wall of the machine room 40. The reinforcing member 43 is made of angle steel and is fixed to the machine room 40 by spot welding or screwing. The reinforcing member 43 also serves as a tap plate (a plate with a hole for self-tapping) for fastening a support base (described later) to which the Stirling refrigerator 50 is attached.

  The heat insulation housing 10 itself is also reinforced. As seen in FIGS. 1 and 4, a base portion 15 configured by combining metal pipes and sheet metal is provided at the bottom of the heat insulating housing 10. A reinforcing member 16 having a shape shown in FIG. 5 is fixed to the base portion 15. The reinforcing member 16 is formed by combining two angle steel materials in an L-shape and is arranged one by one inside the left side wall and the right side wall of the outer box 10a. The reinforcing member 16 rises from the base portion 15 at the rear corners of the left and right side walls so that its corners are aligned with the corners of the side walls.

  A horizontal beam 17 is provided between the left and right reinforcing members 16. The beam 17 is also made of angle steel, and is fixed to the reinforcing member 16 at a height aligned with the lower edge of the window 14 of the back plate 10c. The beam 17 serves to support the machine room 40 inserted from the window 14 from below, and also serves as a tap plate for fastening the support base to which the Stirling refrigerator 50 is attached.

  Thus, by supporting a part of the weight of the Stirling refrigerator 50 with the heat insulating material 12 of the heat insulating housing 10, the weight burden applied to the members constituting the machine room 40 is reduced accordingly. Thereby, it can prevent that a distortion arises in the structural member of the machine room 40, and it leads to the unauthorized attachment of the Stirling refrigerator 50. And since the heat insulating material 12 absorbs the vibration and sound which Stirling refrigerator 50 emits, it is suppressed that a vibration and a sound are amplified and transmitted outside the refrigerator 1.

  Furthermore, a reinforcing member 16 that rises from the base portion 15 of the heat insulating housing 10 is provided at the rear corners of the left and right side walls of the heat insulating housing 10, and the beam 17 that supports the machine room 40 from below between the left and right reinforcing members 16. Therefore, the strength of the heat insulating casing 10 is improved and the machine room 40 is also supported so as to withstand the weight of the Stirling refrigerator 50.

  The beam 17 may be provided at the position of the front corner of the bottom wall of the machine room 40 so that the machine room 40 is supported from below and at the same time serves to reinforce the front corner. In this case, the strength of the heat insulating casing 10 and the machine room 40 is improved, and the front corners of the bottom wall of the machine room 40 are supported and reinforced from below, so that the Stirling is placed in front of the machine room 40. Even if the refrigerator 50 is installed, it can be firmly supported. In this case, the beam 17 adjacent to the window 14 of the back plate 10c may be moved, but this beam 17 is left as it is, and another new beam 17 is placed at the front corner of the bottom wall of the machine room 40. It is good also as a structure to provide.

  Instead of the beam 17, a beam 18 shown in FIG. 9 may be used. The beam 18 has two L-shaped members 18a configured by combining angle steel materials, and is arranged symmetrically, and a tap plate 18b is placed between the two L-shaped members 18a. Are fixed to each other by screwing or welding. The tap plate 18b is in a position to receive the front corner of the machine room 40. The beam 18 supports the bottom wall of the machine room 40 from below, and serves as a counterpart to reinforce the front corner and to fasten the support base of the Stirling refrigerator 50 with screws. Thereby, the strength of the heat insulating casing 10 and the machine room 40 is improved, and the front corner portion of the bottom wall of the machine room 40 is supported and reinforced from below, so that the Stirling refrigerator is located closer to the front of the machine room 40. Even if 50 is installed, this can be supported firmly.

  When the Stirling refrigerator 50 is installed in the machine room 40, the Stirling refrigerator 50 is temporarily attached to the support base 53 (see FIG. 6), and the support base 53 is fixed to the bottom surface of the machine room 40. . The support base 53 is fixed by screwing a screw (not shown) (which is a tapping screw) into a self-tapping hole formed in the reinforcing member 16 and the beam 17 (or the beam 18 when the beam 18 is used) and tightening. . The support base 53 is a sheet metal part, and supports the support legs 54 extending horizontally from four places of the Stirling refrigerator 50 via vibration absorbing rubber 55 (see FIG. 8). A bolt 56 that vertically passes through the support base 53, the vibration absorbing rubber 55, and the support leg 54 connects the three.

  As shown in FIG. 8, a bulging portion 53 a that swells upward is formed in the bolt penetration portion of the support base 53. The head of the bolt 56 is accommodated in the raised portion 53 a and does not protrude downward from the lower surface of the support base 53. Thereby, the support base 53 can be exactly fitted to the bottom surface of the machine room 40.

  The high temperature side condenser 72 is also fixed to the support base 53 via the stay 57. In FIG. 6, a blower is drawn on the high-temperature side condenser 72, but this blower is not attached to the high-temperature side condenser 72, but is disposed in an air cooling duct described later. It is.

  After the Stirling refrigerator 50 is installed, the back side opening of the machine room 40 is closed with a lid 44. The lid 44 is formed with an air vent 45 for taking in air for cooling the high temperature side condenser 72 and an opening for exposing an outlet of an air cooling duct described later.

  The high temperature side condenser 72 discharges heat into the atmosphere. In order to efficiently exhaust heat, the air cooling duct 90 is combined with the high temperature side condenser 72. The air cooling duct 90 is a sheet metal part having a rectangular cross section, and its inlet is applied to the upper surface of the high temperature side condenser 72 and its outlet is applied to the opening of the lid 44. When viewed from the side, the air cooling duct 90 extends obliquely upward from the entrance to the exit at an angle of 45 ° to the horizontal.

  The air cooling duct 90 has an outlet portion fixed to the lid 44. The other inlet portion is not fixed to the high-temperature side condenser 72 but is simply placed on it. That is, the air cooling duct 90 is “free connected” to the high temperature side condenser 72.

  The high temperature side condenser 72 vibrates together when the Stirling refrigerator 50 vibrates. A cushion material (not shown) is inserted between the periphery of the high temperature side condenser 72 and the air cooling duct 90 so that the vibration of the high temperature side condenser 72 is not transmitted to the air cooling duct 90. This cushion material also serves as a gasket for airtightly connecting the high temperature side condenser 72 and the air cooling duct 90.

  A blower 91 is inserted into the air cooling duct 90. The blower 91 has two propeller fans arranged side by side (see FIG. 10). The blower 91 can be taken in and out from the outlet side of the air cooling duct 90.

  When the blower 91 is operated, external air is sucked from the vent 45 of the lid 44. The air that has entered the machine room 40 passes through the high temperature side condenser 72 and takes away the heat released by the high temperature side condenser 72. The air deprived of heat is sucked into the air-cooling duct 90, further sucked into the blower 91, and discharged from there to the outside obliquely upward.

  FIG. 10 shows a second embodiment of the present invention. FIG. 10 is a perspective view of the machine room.

  In the first embodiment, the machine room 40 is made of sheet metal, but in the second embodiment, it is made of resin molded parts. The entire structure including the air cooling duct 90 is integrally formed as one part.

  By using the machine room 40 as a resin molded part in this manner, the machine room 40 can be industrially produced in large quantities and the cost can be reduced. Further, by integrally molding the air cooling duct 90 in the machine room 40, the overall configuration is simplified. Moreover, the joint between the air cooling duct 90 and the machine room 40 can be eliminated by integral molding, and air leakage from this location can be prevented.

  In order to give the machine room 40 strength sufficient to withstand the weight of the Stirling refrigerator 50, reinforcing ribs may be appropriately provided on the outer surface or the inner surface of the machine room 40. FIG. 10 shows an example in which a plurality of horizontal reinforcing ribs 46 are formed on the outer surface of the machine room 40 and bitten into the foam heat insulating material 12.

    As mentioned above, although each embodiment of the present invention was described, the scope of the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention.

    INDUSTRIAL APPLICABILITY The present invention is a household or commercial refrigerator, and can be used in general with a Stirling refrigerator as a cold heat source.

Vertical sectional view of the refrigerator according to the first embodiment of the present invention. Schematic configuration diagram of cooling cycle Illustration of how the secondary refrigerant flows Rear perspective view of the refrigerator Disassembled perspective view of thermal insulation housing components Perspective view of Stirling refrigerator Perspective view of machine room Partial enlarged sectional view Perspective view of deformed beam The perspective view of the machine room concerning a 2nd embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooling box 10 Heat insulation housing | casing 15 Base part 16 Reinforcement member 17, 18 Beam 20 Refrigeration room 30 Freezer room 40 Machine room 43 Reinforcement member 90 Air cooling duct

Claims (5)

  A refrigerator that cools the interior with a Stirling refrigerator, and forms a machine room that houses the Stirling refrigerator on the back surface of the heat-insulating housing constituting the refrigerator body, and a part of the weight of the Stirling refrigerator is A cooler supported by a heat insulating material of the heat insulating casing.   It is a refrigerator that cools the interior with a Stirling refrigerator, and a machine room for storing the Stirling refrigerator is provided on the back surface of the heat insulating casing constituting the refrigerator main body, and the rear corners of the left and right side walls of the heat insulating casing 2. The refrigerator according to claim 1, wherein a reinforcing member that rises from a base portion of the heat insulating casing is provided in the part, and a beam that supports the machine room from below is provided between the left and right reinforcing members.   The machine room is configured as a rectangular parallelepiped in which a top wall, a front wall, a bottom wall, and left and right side walls are connected to each other so that the rear side of the heat insulating housing is open, and a reinforcement that extends in the left-right direction at the front corner of the bottom wall The cooler according to claim 1, wherein a member is provided.   It is a refrigerator that cools the interior with a Stirling refrigerator, and a machine room for storing the Stirling refrigerator is provided on the back surface of the heat insulating casing constituting the refrigerator main body, and the rear corners of the left and right side walls of the heat insulating casing A reinforcing member that rises from the base portion of the heat-insulating housing is provided at the portion, and a beam that supports the machine room from below is provided between the left and right reinforcing members. The machine room includes a top wall, a front wall, and a bottom wall. The left and right side walls are connected to each other to form a rectangular parallelepiped whose rear side of the heat insulating casing is open, and the front corner of the bottom wall is reinforced by the beam. It is a refrigerator that cools the interior with a Stirling refrigerator, and a machine room for storing the Stirling refrigerator is provided on the back surface of the heat insulating housing constituting the refrigerator body, and this machine room is made of resin molded parts, And the cooling cabinet characterized by integrally molding the air-cooling duct which discharges | emits the heat | fever which the said Stirling refrigerator discharge | releases.

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