JP2007057193A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress protrusion of an uppermost shelf far side, and to increase internal volume and depth of a lowermost shelf by mounting a compressor in an upper side, and to improve a service life of the compressor. <P>SOLUTION: In the refrigerator, the compressor 52 is mounted in a top face rear of a storage chamber of an uppermost shelf being a wasteful space unreachable even by stretching, and an efficient and rational heat exhaust air duct of a machine chamber 51 is composed for the purpose of lowering temperatures of a sliding part and a resin component 56 in an interior of the compressor 52 to improve service life of the compressor, and reducing electric energy consumption by reduction of a penetration heating value from the machine chamber 51 into a refrigerator interior, by providing a heat dissipation fan 53 such that air is blown onto the compressor 52 to carry out heat dissipation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigerator having a compressor disposed behind the top surface.

  In recent years, refrigerators are required to be further energy-saving from the viewpoint of protecting the global environment, and to be improved in usability and storage.

  A conventional refrigerator of this type is generally configured such that a machine room is formed in the rear rear region of the storage room disposed at the lowermost part, and a compressor for a refrigeration cycle is accommodated in the machine room. In such a configuration, the storage space of the lowermost storage chamber is invaded in the machine room and the storage volume is reduced, and the space shape of the storage space is also stored in a complicated shape excluding the protruding part of the machine room. It was not good.

  For the purpose of solving the problems related to the conventional storage properties, as described in Patent Document 1, a recessed portion is provided so that the back of the uppermost storage chamber of the heat insulation box is lowered. A refrigerator in which a high-pressure component such as a compressor of a refrigeration cycle is housed in the recess has been proposed.

  9 and 10 show a schematic cross-sectional view and a schematic perspective view of a conventional refrigerator described in Patent Document 1. FIG.

  As shown in FIGS. 9 and 10, the heat insulating box 1 has a refrigerator compartment 2, a freezer compartment 3, and a vegetable compartment 4 in order from the top, and a refrigerator compartment rotary door 5 is provided at the front opening of the refrigerator compartment 2. ing. In addition, the freezer compartment 3 and the vegetable compartment 4 located in the lower part from the center of the heat insulating box 1 are provided with a drawer type freezer compartment drawer door 6 and a vegetable compartment drawer door 7 that can be easily taken out in consideration of storability and convenience. Is provided. A plurality of storage shelves 8 are provided in the refrigerator compartment 2, and storage containers 9 a and 9 b having an open top shape are attached to the freezer compartment 3 and the vegetable compartment 4. The storage containers 9a and 9b are supported on a rail (not shown) in the front-rear direction so as to be movable in the front-rear direction of the roller.

  The recessed part 10 provided in the heat insulation box is a place where the top rear part over the outer box upper surface 11 and the outer box rear surface 12 is recessed so that the uppermost rear part of the refrigerator compartment 2 is lowered. The left and right sides of the recess 10 are closed by the left and right walls of the heat insulating box 1 and open upward and to the back. The open portion of the recess 10 includes an upper plate 13 and a back plate 14 substantially perpendicular to the upper plate 13. It is covered with the recessed part cover 15 which consists of. The recess cover 15 is detachably fixed to the heat insulating box 1 with screws or the like.

  The compressor 16 and the condenser 17, which are components of the refrigeration cycle, are arranged so as to be accommodated in the recess 10 together with the machine room fan 18, and are covered with a recess cover 15 including an upper plate 13 and a back plate 14. The upper plate 13 and the back plate 14 are provided with ventilation holes 19, and the air sucked from the upper plate 13 is exhausted from the back plate 14 after exchanging heat with the condenser 17.

  The evaporator 20 which is a component of the refrigeration cycle is disposed with a cooling fan 21 at the back of the freezer compartment 3 which is the middle stage of the heat insulation box 1, and the vegetable compartment 4 which is the lowermost storage room has a depth. Deeply structured.

Thereby, compared with the refrigerator which accommodates the compressor 16 and the condenser 17 in the back lower part of the heat insulation box 1, the internal volume of the vegetable compartment 4 which is the lowest storage compartment can be comprised deeply, and it can comprise. The space shape does not become a complicated shape due to the ineffective space such as the compressor 16, and the storage property can be improved, and the compressor 16 and the condenser 17 stored in the recess 10 of the heat insulating box 1 are radiated by the machine room fan 18. In addition, the efficiency of the refrigeration cycle can be improved.
JP 2001-99552 A

  However, in the above-described conventional configuration, the condenser 17 is cooled by the machine room fan 18, and the heat radiated by the compressor 16 accommodated in the recess 10 is exhausted to the outside, thereby reducing the temperature to some extent. However, since the arrangement of the machine room fan 18 with respect to the compressor 16 has not been devised, that is, the machine room fan 18 is arranged so as to radiate heat mainly from the condenser 17. The amount of air circulation for radiating 16 is small. Further, since the suction section and the discharge section of the machine room fan 18 are not sealed, the machine room fan 18 again sucks the air radiated by the compressor 16 and the condenser 17, and the heat radiated from the compressor 16 and the condenser 17. Cannot be performed efficiently, leading to a temperature rise.

  For this reason, the compressor 16 is operated at a high temperature, and a sliding part such as a piston for compressing the refrigerant and a rise in the temperature of the refrigerating machine oil for lubricating the sliding part cause abnormal wear of the sliding part due to the trigger. In addition, the compressor 16 has a problem of promoting a reduction in service life. Further, the high-pressure refrigerant cannot efficiently dissipate heat in the condenser 17, and there is a problem of slow cooling in the refrigerator due to insufficient cooling capacity.

  Further, since the ventilation hole 19 is provided in the upper plate 13 of the concave cover 15, the ventilation hole 19 is closed when an object is placed in the vicinity thereof. In many cases, the mounted object is discolored due to the upper plate 13 becoming hot.

  Further, since the compressor 16 and the condenser 17 are installed in the recess 10, the space required for the recess 10 is increased, and in addition, the temperature of the recess 10 is increased so that heat conduction to the refrigerator compartment 2 is suppressed. Increasing the wall thickness of the body 1 deteriorates the storability of the upper periphery of the refrigerator compartment 2, and gives the user a feeling of pressure when the door is opened and also deteriorates the design.

  The present invention solves the above-mentioned conventional problems, and arranges a compressor and a condenser behind the top surface of the uppermost storage chamber, which is an invalid space that cannot be reached even if it is stretched back. By installing a machine room fan to dissipate heat, the temperature of the sliding part inside the compressor and the cover top plate is efficiently reduced, improving the life of the compressor and safety by reducing the temperature of the refrigerator casing It aims at providing the refrigerator which secured.

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes a heat insulating box, a compressor, a condenser, and an evaporator provided in the heat insulating box in order to form a series of refrigerant flow paths. In a refrigerator having a refrigeration cycle and a fan for cooling the compressor, a recessed portion lowered by one step is provided at a rear portion of the top surface of the heat insulation box, and at least the compressor, the fan, and the condenser are recessed. It is arranged in the compartment.

  Thereby, forced convection air generated by the operation of the fan flows around the compressor, and the compressor is cooled from the outer shell, so that an efficient and rational air path can be configured.

  The refrigerator of the present invention can improve the life of the compressor by reducing the temperature rise of the compressor and suppressing the wear of the sliding part and the deterioration of the refrigeration oil.

  Further, the coefficient of performance of the refrigerating capacity due to the temperature reduction of the compressor is improved, and the heat transfer into the refrigerator can be suppressed by the temperature reduction of the machine room, so that the power consumption can also be reduced.

  In addition, by devising the storage position of the functional parts that create the ineffective space, the food storage space at a location that can be reached can be expanded, so that it is possible to provide a user-friendly refrigerator.

  The invention according to claim 1 is provided with a heat insulation box and a machine room formed by denting the rear portion of the top surface of the heat insulation box inside the container, and at least a compressor, a fan, and a condenser are accommodated, By arranging the position from the left and right ends of the machine room with the compressor, the fan, and the condenser, forced convection air generated by the operation of the fan flows around the compressor, To reduce the temperature of sliding parts such as pistons, which are compression elements of compressors, and refrigeration oil, to suppress abnormal wear of sliding parts and thermal decomposition of refrigeration oil, and to improve the life of the compressor The condenser, which is a high-pressure device for the refrigeration cycle, can also be used for forced cooling due to the forced ventilation effect of the fan, and the high-pressure device can be unitized to form a more compact and rational machine room assembly. .

  Further, the compressor is removed from the rear of the lowermost storage chamber, and the compressor can be stored in the back of the uppermost storage chamber. While accommodating functional parts, the internal volume and depth of the lower storage chamber can be expanded.

  According to a second aspect of the present invention, in the first aspect of the present invention, the fan is used as a boundary, and is disposed between the compressor and the condenser. The first compartment that houses the compressor and the second compartment that houses the condenser are formed with the fan interposed therebetween, and the first compartment serves as a discharge compartment, and the second compartment The section is a suction section, the condenser is arranged upstream of the forced ventilation, i.e., the suction section, and the compressor is arranged downstream, i.e., the discharge section, and the high heat of the compressor hinders the heat dissipation of the condenser. While avoiding, both the compressor and the condenser can enjoy the forced cooling effect.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the volume of the first compartment is larger than the volume of the second compartment, and the fan located in the suction compartment Since the air resistance on the suction side can be reduced, the amount of air generated by the operation of the fan can be increased, and the temperature of the compressor can be further lowered.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the condenser is configured by a precooling pipe, a part of which is directly connected to the discharge side of the compressor. Therefore, even if there is no large space, it is possible to accelerate the heat dissipation of a considerable amount of sensible heat using the forced ventilation of the fan, and the condenser piping following this precooling piping is thermally conductive to the inner surface of the outer box of the heat insulation box. In the case of being disposed, the temperature of these pipes can be reduced, and the surface temperature of the outer box can be lowered to reduce the discomfort caused by the user touching.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the flow of air in the machine room is changed from the suction section of the second section to the fan, and to the first section. Since the air passage configuration is directed to the discharge section of the other section, outside air at a low temperature is introduced from the suction port (not shown) in the suction section, and a part of the condenser to be accommodated is stored in the compressor. A compressor that cools and dissipates heat from a precooling pipe that is directly connected to the discharge side, and then air that flows from the suction side of the fan, which is the boundary, to the discharge side moves to the discharge section and directly hits the outer surface of the compressor to generate heat. Cool the heat dissipation. The air heated by heat exchange is finally discharged from a discharge port (not shown). As a result, the flow of air becomes an opposite flow while the flow of the refrigerant in the refrigeration system goes from the compressor to the condenser, which is the precooling pipe on the discharge side, and an efficient heat dissipation effect is obtained.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the radiated high-pressure refrigerant is always in contact with the outside air by disposing the dryer on the windward side of the compressor. Since the refrigerant that has been radiated and liquefied can be reheated and vaporized, there is no risk of causing a malfunction in the refrigeration cycle, it is possible to supply a stable liquid refrigerant and improve the reliability of the cooling system Can do.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the dryer is locked together with the fan, whereby the number of parts and man-hours can be reduced, and the cost is low. A refrigerator can be provided.

  Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a schematic view of a machine room of the refrigerator according to the same embodiment, and FIG. 3 is a view of a machine room of the refrigerator according to the same embodiment. FIG. 4 is an exploded view of the machine room of the refrigerator according to the embodiment, and FIG. 5 is a longitudinal sectional view of the compressor of the refrigerator according to the embodiment.

  In FIG. 1 to FIG. 4, the refrigerator main body 30 includes a heat insulating box 31 divided into a plurality of heat insulating compartments and doors provided in the respective heat insulating compartments. The heat insulating box 31 includes a heat insulating wall formed by injecting a foam heat insulating material 34 into a space formed by an inner box 32 formed by vacuum molding a resin body such as ABS and an outer box 33 using a metal material such as a pre-coated steel plate. ing. For example, rigid urethane foam, phenol foam, styrene foam, or the like is used as the foam heat insulating material 34. Use of hydrocarbon-based cyclopentane as the foaming material is better from the viewpoint of preventing global warming.

  The heat insulation box 31 forms a plurality of storage rooms, and has a refrigeration room 40, an ice making room 41, a vegetable room 42, and a freezing room 43 from the top. A heat insulating door is provided through a gasket (not shown) at the front opening of each heat insulating section. From the top, the refrigerator compartment door 40a, the ice making compartment door 41a, the vegetable compartment door 42a, and the freezer compartment door 43a. Note that the ice making chamber 41 may not be configured with the full width of the heat insulating box 31 but may form a storage chamber in which the adjacent chamber is partitioned by a partition wall (not shown).

  The heat insulation box 31 forms a recess 50 in which the rear part of the top surface is recessed in a stepped shape, and opens above and behind the heat insulation box 31. The concave portion 50 accommodates a precooling condenser 54 serving as a precooling pipe in which a compressor 52, a heat radiating fan 53, and a part of the condenser are directly connected to the discharge side of the compressor 52 as a machine chamber 51. A compressor 52, a heat radiating fan 53, and a precooling condenser 54 are arranged from the left and right ends of 51. A first section 91a that accommodates the compressor 52 with the heat radiating fan 53 interposed therebetween is defined as a discharge section 91b, and a second section 92a that accommodates the precooling condenser 54 is defined as a suction section 92b. The heat radiating fan 53 is disposed at an intermediate position between the compressor 52 and the precooling condenser 54, that is, at an intermediate position in the width direction of the machine chamber 51. The upstream side is a suction section 92b and the downstream side is a discharge section 91b. It is configured to circulate in such a flow as to hit. A condenser pipe following the precooling condenser 54 is disposed on the inner surface of the outer box 33 of the heat insulating box 31 in a heat conductive manner.

  Next, the configuration in the recess 50 will be described.

  The recess 50 is formed by cutting out the rear side of the top surface of the outer box 33 that is the outer shell of the heat insulating box 31, and the front wall, the left and right side walls, the compressor 52 and the heat radiating fan 53 are placed in the cutout portion. The resin part 56 formed integrally with the bottom surface is formed so as to be fitted from the rear side of the heat insulating box 31. In addition, since the intensity | strength becomes weak for the recessed part 50 formed by notching, it is common to provide the reinforcement means which is not shown in the periphery. As the reinforcing means, in particular, if the inclined portion 57 is provided at the joint portion of the bottom surface and the side surface of the recess 50 to connect the bottom surface and the side surface, or the foam heat insulating material 34 is injected into both the left and right sides between the side surface and the outer box 33, the effect is obtained. large.

  The recess 50 is provided with a machine room cover 62 so as to cover the internal compressor 52 and the radiating fan 53 precooled condenser 54. The machine room cover 62 is provided with openings 63 and 64, which will be described later in detail, for allowing air to flow in and out of the machine room 51.

  The heat radiating fan 53 is inserted and fixed in the fan cover 90 via a soft cushioning member (not shown) such as polyurethane foam. The fan cover 90 has the resin component 56 substantially perpendicular to the installation bottom surface of the compressor 52. Arranged to be That is, the heat radiating fan 53 is installed below the machine room 51, and the center position of the heat radiating fan 53 is positioned lower than the center position of the compressor 52. Further, the fan cover 90, the resin component 56, and the machine room cover 62 are brought into close contact with the outer periphery of the fan cover 90 via a soft seal member 93 such as polyurethane foam.

  With such a configuration, the discharge side and the suction side of the heat radiating fan 53 are reliably sealed and partitioned, and the discharge section 91b that is the discharge side section and the suction section 92b that is the suction side section are configured in the machine chamber 51. . Here, the compressor 52 is located in the discharge section 91b.

  The opening 63 provided in the machine room cover 62 is located in the suction section 92 b in the machine room 51, and is used to suck the air around the refrigerator body 30 into the machine room 51. On the other hand, the opening 64 located in the discharge section 91 b in the machine room 51 is used for exhausting the heat radiated from the compressor 52 to the outside of the machine room 51.

  On the bottom surface of the heat insulating box 31, a condenser 100 of the refrigeration cycle is arranged in front of it, and an evaporating dish 102 for storing water defrosted by the evaporator 101 is arranged in the rear. In order to improve the internal volume of the refrigerator main body 30, both parts are small and highly efficient. A typical condenser 100 is a spall fin tube type, which is provided in a pipe affixed to the inside of the outer box 33 with good heat transfer or a partition between each heat insulating door body to prevent drip-proofing. You may combine piping for. In addition, the capability of the condenser 100 and prevention of dew condensation are more effective by installing a fan (not shown) for circulating the air at the bottom of the heat insulating box 31.

  Next, the internal configuration of the compressor 52 will be described.

  As shown in FIG. 5, the compressor 52 generally engages a mortar-shaped lower container 70 and a reverse mortar-shaped upper container 71, which are formed by deep-drawing a rolled steel plate, and welds the engagement portion around the circumference. A sealed container 72 is formed by joining, and inside the sealed container 72 is stored a refrigerant 73 and a refrigerating machine oil 74 at the bottom. A leg 75 is fixed to the lower side of the sealed container 72, and the elastic member 76 is fitted into a pin provided in the concave portion 50 of the refrigerator main body 30 through an elastic part 76 such as rubber with which the leg 75 is locked. The position is fixed. Both the electric element 77 and the compression element 78 are accommodated in a sealed container 72. The compression element 78 has a compression chamber 82 for compressing a substantially cylindrical refrigerant and discharging it into the refrigeration cycle, and is driven to rotate about a shaft 83. It is formed above the electric element 77. That is, the compression chamber 82 is located above the center of the compressor 52.

  Next, the structure of the heat insulation box 31 on the storage chamber side will be described.

  The refrigerator compartment 40 is normally set at 1 to 5 ° C. with the temperature not frozen for refrigerated storage as the lower limit. A concave portion 50 for accommodating the compressor 52 is formed in the storage chamber so as to protrude upward, and a plurality of shelves 105 for arranging and storing food and the like are provided, and a plastic bottle or the like is provided inside the refrigerator compartment door 40a. A plurality of pockets 106 for storing beverages are provided. A storage case 107 for improving the freshness of meat fish or the like is provided at the lowest level, and is set at a relatively low temperature, for example, -3 to 1 ° C.

  The ice making chamber 41 is normally set at −22 to −18 ° C. in order to generate and store ice. The inside of the refrigerator is provided with an ice making mechanism 121 having an ice tray for generating ice, is configured to accommodate an ice storage container 122 for storing the produced ice, and to be pulled out by a rail (not shown) or the like. Yes.

  The vegetable room 42 is generally set to 2 ° C. to 7 ° C., which is equal to or slightly higher than that of the refrigerated room 40, and the freshness of the leaf vegetables can be maintained for a long time as the temperature is lowered. The inside of the cabinet is configured to accommodate a vegetable compartment container 110 that can organize and store foods such as vegetables, and can be pulled out by a rail (not shown) or the like.

  The freezer compartment 43 is normally set at −22 to −18 ° C. for frozen storage, but may be set at a low temperature of −30 or −25 ° C., for example, to improve the frozen storage state. The inside of the cabinet accommodates a freezer compartment 111 that can organize and store foods, and is configured to be pulled out by a rail (not shown) or the like.

  A cooling chamber 112 is provided on the back of the vegetable compartment 42 and the freezing compartment 43, and the cooling compartment 112 partitions the vegetable compartment 42 and the freezing compartment 43 by a first partition wall 113 having heat insulating properties. The vegetable compartment 42 and the freezer compartment 43 are partitioned by a second partition wall 114 having heat insulation properties.

  In the cooling chamber 112, a vertically long evaporator 101 for exchanging heat in the air in the cabinet, a cooling fan 115 for sending cold air to each storage chamber, and a defrost for defrosting frost adhering to the evaporator 101 during cooling. The apparatus 116 and the water receiving part 117 which receives defrosted water are comprised, and defrost water is drained from the water receiving part 117 to the evaporating dish 102.

  Next, the structure of the machine room 51 and the refrigerator compartment 40 is demonstrated.

  Fig.6 (a) is the figure which looked at the upper part of the refrigerator in the same embodiment from the back, and FIG.6 (b) shows the sectional view on the AA line of FIG.6 (a) of the refrigerator in the same embodiment. Is. A machine room 51 is formed on the upper rear surface of the refrigerator compartment 40 and is partitioned from the refrigerator compartment 40 by a heat insulating wall. The machine room 51 forms a space by the above-described heat insulating wall and the machine room cover 62, and is divided into a discharge section 91b and a suction section 92b by a heat radiating fan 53. The depth of the discharge section 91 b is approximately the same size as the compressor 52, and the depth of the suction section 92 b is configured approximately the same size as the heat dissipation fan 53.

  As for the shape of the heat insulating wall at the back of the refrigerator compartment 40, a depression is formed on the suction section 92b side by the difference in depth between the discharge section 91b and the suction section 92b of the machine chamber 51. A refrigeration room air passage 126 that guides the cold air for cooling the inside of the refrigeration room 40 to the upper part is disposed in the above-described depression, and the front surface of the refrigeration room air passage 126 is covered with a refrigerator compartment decorative plate 125.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the compressor 52 is placed in the recess 50 at the rear of the top surface of the heat insulating box 31 and is not disposed in the rear region of the lowermost freezer compartment 43, and the cooling chamber 112 is placed in the freezer compartment 43 and the vegetable compartment above it. 42, the evaporator 101 and the cooling fan 115 are provided within the height range of the freezer compartment 43 and the vegetable compartment 42, and the evaporator 101 is extended in the height direction to reduce the depth dimension. By reducing the thickness of the chamber 112 and reducing the ineffective space that does not contribute to the internal volume, the storage capacity of the vegetable chamber 42 and the freezing chamber 43 can be increased and the storage performance can be improved. Moreover, since the recessed part 50 of the back | upper surface of the heat insulation box 31 was difficult for the user to reach, so to speak, it was a space close to an invalid space, so positioning the compressor 52 at that location would greatly increase the internal volume of the refrigerator body 30. It can be used well. Furthermore, since the vegetable compartment 42 and the freezer compartment 43 are drawer-type storage rooms, food stored in the back of the vegetable compartment container 110 and the freezer compartment container 111 can be easily put in and out, and the usability can be improved.

  However, if the recess 50 on the rear side of the top surface of the heat insulation box 31 is formed compactly and the protrusion margin to the inner side of the uppermost refrigerator compartment 40 is not made as small as possible, a feeling of pressure or a blockage is felt visually. It becomes a thing.

  Therefore, it is necessary to dispose the condenser 100 of the refrigeration cycle on the bottom surface of the refrigerator body 30 and to dispose only the heat dissipating fan 53 for cooling the compressor 52 in the recess 50 to promote heat dissipation. The volume and the exhaust heat air passage can be formed compactly, and the protrusion allowance to the refrigerator inner side to the refrigerator compartment 40 can be suppressed.

  However, on the other hand, by placing the compressor 52 on the upper side, for example, the top plate of the system kitchen frame is positioned near the top surface of the refrigerator body 30 or the object is placed on the top surface of the refrigerator body 30 for compression. It is conceivable that the heat dissipation of the machine 52 is hindered and heat tends to stay in the recess 50. In that case, as described in the above-described conventional example, even if the heat dissipating fan 53 is provided, there is almost no effect of temperature reduction unless the air passage configuration of the machine room 51 that efficiently dissipates the compressor 52 is used.

  According to the present embodiment, the heat dissipating fan forms an air passage for circulating air near the bottom surface of the compressor 52 where the refrigerating machine oil 74 as a lubricant stays in the compression chamber 82 of the compressor 52. 53 is provided to improve the reliability of the compressor 52 by creating an efficient and rational air passage configuration of the machine room 51.

  The refrigerating machine oil 74 is described above even when the refrigerator main body 30 has a very high outside air temperature and the space between the surrounding wall and the ceiling is extremely small. As described above, the heat radiating fan 53 is arranged near the bottom surface of the concave portion 50 and promotes heat radiation around the refrigerating machine oil 74 by circulating air mainly below the compressor 52, particularly in the space between the bottom surface and the bottom surface of the concave portion 50. This makes it possible to maintain a low temperature, so that the refrigerating machine oil 74 can serve as a lubricant without being thermally decomposed, suppresses abnormal wear of the compression chamber 82, and the like, and near the bottom surface of the machine chamber 51. Since the temperature can be reduced, heat can be prevented from entering the refrigerator compartment 40 that is the uppermost storage room, and the amount of power consumption can be reduced.

  Next, regarding the air channel configuration of the machine room 51, the machine room cover 62 for covering the recess 50 provided at the rear of the top surface of the heat insulation box 31 is provided with openings 63 and 64 so that the inside and outside of the machine room 51 are covered. The air can come and go, and by the operation of the heat radiating fan 53, the outside air sucked from the opening 63 is sucked into the heat radiating fan 53 and touches the precooling condenser 54 in the suction section 92b to radiate heat. The air discharged from the suction side to the discharge side passes through the outer surface of the compressor 52 and is discharged from the opening 64 to the outside of the machine chamber 51. The heat radiating fan 53 can be operated when the compressor 52 is normally operated to promote heat dissipation.

  At this time, the precooling condenser 54 is connected to the discharge pipe side of the compressor 52 and becomes a part of the condenser leading to the main condenser 100 disposed on the inner surface of the outer box 33 and the bottom surface of the refrigerator body 1. This is a condensing pipe, and in this embodiment, the pipe has a looped shape including the purpose of suppressing vibration transmission from the compressor 52, and a high-temperature refrigerant gas discharged from the compressor 52 at this portion. Promotes heat dissipation. By incorporating the precooling condenser 54 in the forced air flow path of the heat radiating fan 53, the precooling condenser 54 is forcibly cooled in addition to the forced cooling of the compressor 52, and a machine room in which a forced cooling type high pressure unit is incorporated. The assembly can be made compact and rational.

  Further, even if there is no large space, the precooling condenser 54 can promote the heat dissipation of a considerable amount of sensible heat by using the forced ventilation action of the heat radiating fan 53, and the condenser piping following the precooling condenser 54 is a heat insulating box. In the case where it is disposed on the inner surface of the body outer box 33 in a heat conductive manner, the piping temperature can be effectively reduced, and the surface temperature of a corresponding portion of the outer box 33 can be lowered to reduce the user's etc. Discomfort caused by touching can be reduced.

  In this embodiment, the precooling condenser 54 is used. However, if the installation space permits, a condenser having a high heat exchange rate such as a finned tube heat exchanger is accommodated to cause forced cooling of the main condenser. Of course it is also possible.

  In addition, the recess 50 is integrally formed with the resin component 56 to reduce the number of components and improve work efficiency. In particular, an inclined portion 57 is provided at the joining portion of the bottom surface and the side surface of the resin component 56 to be connected. Thus, it is possible to disperse the load of the compressor 52 and the like applied to the recess 50 and improve the strength. In that case, distortion of the refrigerator main body 30 can be suppressed and the refrigerator compartment door 40a can be prevented from tilting.

  Further, the heat radiating fan 53 is simply brought into close contact with the space of the recess 50 and the machine chamber cover 62 and the seal member 93 through the fan cover 90, and the compressor 52 side is divided into a discharge section 91b and vice versa as a suction section 92b. Therefore, the heat radiating fan 53 does not suck the air that has passed through the high-temperature compressor 52 again, so that the outside air can always be sent from the precooling condenser 54 to the compressor 52 in a certain direction.

  As described above, the flow of the refrigerant in the refrigeration system is discharged from the compressor 52 by adopting a configuration in which the air flow in the machine room 51 is directed from the second section 92a to the heat radiating fan 53 and the first section 91a. As opposed to the precooling condenser 54 on the side, it becomes a counterflow, and an air passage that obtains an efficient and excellent heat dissipation effect can be provided.

  Further, by disposing the heat radiating fan 53 on the suction section 92b side of the recess 50, the outside air having a low temperature flows also to the motor 902 portion of the heat radiating fan 53, so that the reliability of the heat radiating fan 53 itself can be improved. it can.

  Further, by configuring the volume of the suction section 92b of the recess 50 to be smaller than the volume of the discharge section 91b, the resistance of the heat radiating fan 53 on the air suction side can be reduced, and the amount of air flowing through the recess 50 can be reduced. Can be increased.

  Further, by configuring the depth of the concave portion 50 on the suction section 92b side to be substantially the same as the outer dimension of the heat radiating fan 53, a space is created on the back side of the suction section 92b at the upper back of the refrigerator compartment 40. By forming the refrigerator compartment air passage 126 in this space, the depth of the upper part of the refrigerator compartment 40 is increased, and the food storage space can be expanded.

  Further, the opening 63 is positioned in the suction section 92b, and the upper surface of the machine room cover 62 is positioned slightly higher than the top surface of the outer box 33 of the heat insulating box 31 and is provided at the stepped portion so that the temperature is always low. It becomes possible to inhale outside air. Further, the stepped portion is inclined so as to become higher from the front of the heat insulation box 31 toward the back, so that even if an object is placed on the top surface of the heat insulation box 31, the opening 63 is completely There is no blockage. The same effect can be obtained even if an opening for sucking outside air is provided on the suction section 92b side of the rear surface of the machine room cover 62.

  The opening 64 is located in the discharge section 91b and is provided on the opposite side of the heat dissipating fan 53 with respect to the compressor 52 so that heat can be exhausted through the compressor 52. By inclining toward the front side of the heat insulation box 31 toward the front side, the opening 64 can be secured without being blocked even when the back surface of the refrigerator main body 30 is closely attached to the wall.

  In addition, by providing the openings 63 and 64 also above the machine room cover 62, the back of the refrigerator is in close contact with the wall, and even in an installation environment where there is almost no space on the left and right sides, intake and exhaust air is discharged from above the machine room cover 62. It is possible to prevent the air volume from being significantly reduced.

  In the present embodiment, the gap between the lower end of the sealed container 72 constituting the compressor 52 and the bottom surface of the recess 50 is made larger than the gap between the upper end of the sealed container 72 and the upper surface of the machine chamber cover 62. The wind easily circulates under the compressor 52 and promotes the heat radiation of the refrigerating machine oil 74 and also promotes the heat radiation of the bottom surface of the recessed portion 50, so that an efficient and rational exhaust heat air passage of the machine room 51 is achieved. Can be realized. Generally, the bottom surface of the resin component 56 that forms the recess 50 in a shape along the lower container 70 of the compressor 52 is recessed to form an air passage. In this case, a part of the resin component 56 is recessed to the refrigerator compartment 40. Since the protrusion can be suppressed as much as possible, the effect on the decrease in the internal volume can be reduced, so the effect is great.

  Further, in the present embodiment, the compression element 78 in the compressor 52 is shown as being located above, but the compression element 78 is located below and the electric element 77 is located above compresses the high-pressure refrigerant. Heat generated from the compression chamber 82 such as a piston raises the temperature below the compressor 52 and at the same time tends to increase the temperature of the refrigerating machine oil 74. Therefore, the case where the compressor in which the compression element 78 is located below is adopted. However, the heat dissipation effect is increased.

  Further, if the number of revolutions of the heat radiating fan 53 can be changed as required, the compressor 52 can be heated to a high temperature or the refrigerator main body 30 can be installed in a system kitchen frame or the like. When the left and right sides are enclosed and the heat dissipation is hindered, or when the compressor 52 is a variable speed type and the rotational speed is high, the heat dissipation fan 53 is set to a high speed. By doing so, the heat dissipation capability can be increased, and on the other hand, the heat dissipation fan 53 can be stopped or set to a low rotational speed, so that the exhaust heat of the machine chamber 53 can be more efficiently discharged.

  Although it is desirable to configure the air passage of the machine room 51 so that the wind of the heat radiating fan 53 is applied to the compressor 52, the machine room is provided even if the compressor 52 is disposed in the discharge section 91b of the heat radiating fan 53. The effect of 51 as a heat exhaust air passage is not impaired.

  Further, in the present embodiment, a case where the machine room cover 62 is formed as an L-shaped part has been described. However, even if the machine room cover 62 is composed of two parts, an upper plate and a back plate, the machine room 51 is used. The effect as an exhaust heat air passage is not impaired.

  Further, the machine room cover 62 is divided into an upper plate and a back plate, so that either one of the compressor 52 and the heat radiating fan 53 can be attached or detached when peripheral piping such as the discharge pipe 54b or the suction pipe 55 is attached or detached. A container for transporting the machine room cover 62 when supplying the machine room cover 62 to the production line of the refrigerator main body 30 by improving workability because only the parts need be removed and dividing into two parts. It is possible to increase the storage efficiency in the storage space.

(Embodiment 2)
FIG. 7 is a top view of the machine room of the heat insulating box of the refrigerator according to Embodiment 2 of the present invention. The difference from the first embodiment is that the machine room 51 is provided with a dryer 120 for removing moisture in the refrigeration system, and the dryer 120 is upwind of the compressor 52 (the wind direction is indicated by an arrow in FIG. 7). ).

  As described above, in the present embodiment, the radiated high-pressure refrigerant can always be brought into contact with the outside air of the suction section 92b, and the radiated and liquefied refrigerant is reheated and vaporized, and the gasified refrigerant is used. Since there is no possibility of hindering the circulation of the refrigerant, it is possible to supply a stable liquid refrigerant and improve the reliability of the cooling system.

(Embodiment 3)
FIG. 8 is an attachment diagram of the refrigerator dryer according to the third embodiment of the present invention. The difference from the second embodiment is that the dryer 120 is locked to the heat radiating fan 53. The heat radiating fan 53 includes a blade 901, a motor 902, and a fan cover 90 that supports them, and the fan cover 90 is integrally provided with a stopper 904 that fixes the dryer 120. The configuration is such that it is mounted parallel to the direction.

  As described above, in the present embodiment, the heat radiating fan 53 and the dryer 120 are disposed in the machine room 51, and the heat radiating fan 53 includes the wing 901, the motor 902, and the fan cover 90 that supports them. Since the stopper 904 for fixing the dryer 120 is integrally provided, the number of parts and man-hours can be reduced, and an inexpensive refrigerator can be provided. The attachment direction with respect to the stopper 904 may be attached so that the longitudinal direction of the dryer 120 is perpendicular to the bottom surface of the machine room 51. However, by configuring the connection side of the capillary tube of the dryer 120 downward, the phase state of the refrigerant flowing through the capillary tube can be stabilized in the liquid phase, so the number of parts and man-hours can be reduced, An inexpensive refrigerator can be provided and the reliability of the cooling system can be improved.

  As described above, the refrigerator according to the present invention constitutes a layout that expands the amount of storage in a convenient storage room by storing functional parts such as a compressor behind the top surface of the heat insulation box, and Since the compressor can be efficiently and rationally cooled, it can be applied to other cooling devices having a similar layout.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention Machine room schematic diagram of refrigerator in the same embodiment The perspective view of the machine room of the refrigerator in the embodiment Exploded view of the machine room of the refrigerator in the same embodiment Vertical sectional view of the compressor of the refrigerator in the same embodiment (A) The figure which looked at the upper part of the refrigerator in the same embodiment from the back (b) AA line sectional view of Drawing 6 (a) of the refrigerator in the same embodiment Machine room top view of the heat insulation box of the refrigerator in Embodiment 2 of the present invention Attachment drawing of the refrigerator dryer in Embodiment 3 of this invention Schematic sectional view of a conventional refrigerator Schematic perspective view of a conventional refrigerator

Explanation of symbols

31 Heat Insulation Box 51 Machine Room 52 Compressor 53 Heat Dissipation Fan 54 Precooling Condenser 91a First Section 91b Discharge Section 92a Second Section 92b Suction Section 120 Dryer

Claims (7)

  A heat insulation box and a machine room formed by denting the rear part of the top surface of the heat insulation box inside the storage are provided, and at least a compressor, a fan, and a condenser are accommodated in the machine room, and the position of the machine room is A refrigerator, wherein the compressor, the fan, and the condenser are arranged from the left and right ends of the refrigerator.   In the machine room, a first compartment that accommodates the compressor and a second compartment that accommodates the condenser are formed with the fan as a boundary, and the first compartment is a discharge compartment and the second compartment. The refrigerator according to claim 1, wherein the suction compartment is used.   The refrigerator according to claim 1 or 2, wherein the volume of the first compartment is larger than the volume of the second compartment.   The said condenser is comprised with piping, The refrigerator as described in any one of Claim 1 to 3 characterized by the above-mentioned.   5. The refrigerator according to claim 1, wherein the air flow in the machine room is in the order of the second compartment, the fan, and the first compartment.   The refrigerator according to any one of claims 1 to 5, wherein a dryer is disposed on the windward side of the compressor in the machine room.   The refrigerator according to any one of claims 1 to 6, wherein the dryer is locked together with the fan.

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