JP4179212B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator in which a compressor is loaded on 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.

  Conventional refrigerators of this type are provided with a recess that is recessed so that the rear back of the uppermost storage chamber of the heat insulation box is lowered for the purpose of increasing the storage capacity of the storage chamber disposed at the bottom. A method of storing the components of the refrigeration cycle in the recess has been taken (see, for example, Patent Document 1).

  FIG. 7 shows a configuration of a conventional refrigerator described in Patent Document 1. As shown in FIG.

  As shown in FIG. 7, the heat insulating box 1 includes 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. . In addition, the freezer compartment 3 and the vegetable compartment 4 located in the lower part from the center of the heat insulation box 1 are 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 usability. Is provided. A plurality of storage shelves 8 are provided inside the refrigerator compartment 2, and a storage container 9 having an open top surface is attached to the freezer compartment 3 and the vegetable compartment 4. The storage container 9 is supported on a rail (not shown) in the front-rear direction so as to be movable in the front-rear direction by a roller.

  The recessed part 10 provided in the heat insulation box 1 is a place where the top back part over the outer box upper surface 11 and the outer box back surface 12 is depressed so that the uppermost back 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 that is substantially perpendicular to the upper plate 13. The concave cover 15 is covered. 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 that are components of the refrigeration cycle are disposed so as to be accommodated in the recess 10 together with the machine room fan 18, and are covered with the recess cover 15. Further, the upper plate 13 and the back plate 14 of the recess cover 15 are provided with a plurality of ventilation holes for heat dissipation.

  Moreover, 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 2, and the vegetable compartment 4 which is the lowest storage compartment is deeply configured.

Thereby, compared with what 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 can be enlarged and comprised deeply.
JP 2001-99552 A

  However, in the conventional configuration described above, since there is a recess for storing the compressor, the back of the top surface in the refrigerator compartment protrudes, obstructing the refreshing feeling of the refrigerator compartment and giving a narrow impression.

  In addition, refrigerator control boards are becoming more complex and larger with energy saving and higher functionality. The size of control boards such as capacitors and heat dissipation fins for control circuits of inverter compressors used for energy saving and noise reduction, as well as power transformers, is increasing. A very large space is required.

  Furthermore, not only the size of the compressor and condenser, but also the piping vibration and assembly such as the connection piping, the arrangement of refrigeration cycle components such as dryers and flow control valves, and securing the straight line length of the piping welds A very large space is required if a configuration that takes into account workability is taken.

  A very large space is required to store these control boards and pipes in the recesses. For this reason, the size of the inside of the back of the top surface becomes large, and the problem of poor storage due to the unevenness inside the storage becomes a problem.

  The present invention solves the above-described conventional problems. In addition to increasing the inner volume and depth of the lowermost storage room, the present invention reduces the overall size of the refrigerator without significantly increasing the overall height of the refrigerator. Then, it aims at providing the refrigerator which aims at the improvement of a storage property and a refreshing feeling efficiently.

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes a first top surface portion formed of a heat insulating wall, and the first top surface portion on the back side of the refrigerator main body behind the first top surface portion. A heat insulating box provided at a lower position and having a second top surface portion formed of a heat insulating wall, and a compressor disposed in an upper space portion of the second top surface portion, and the second A recess is formed immediately below the top surface of the control panel, and the control board is accommodated in the recess.

  Accordingly, a space for storing the control board is provided separately, so that the depth of the back of the top surface of the interior can be reduced, and a narrow impression due to a step in the rear direction in the interior of the storage compartment can be reduced.

  The refrigerator of the present invention can ensure sufficient inner volume and depth of the lowermost storage chamber, and can reduce the amount of protrusion at the back of the interior top surface.

  Moreover, the effective arrangement | positioning using the place which reduces the level | step difference of the back direction in a store | warehouse | chamber as a storage place of a control board can be performed.

The invention according to claim 1 is provided at a position lower than the first top surface portion on the back side of the refrigerator main body behind the first top surface portion formed of the heat insulating wall and the first top surface portion, A heat insulating box having a second top surface portion formed of a heat insulating wall, and a compressor disposed in an upper space portion of the second top surface portion, and is recessed immediately below the second top surface portion. The recess includes a control board stored therein, a pipe space is provided on either side of the control board stored in the recess, and at least a part of the refrigerant pipe is disposed in the pipe space. As a result, the uppermost storage chamber can be reduced in depth at the top of the top surface, and the step in the rear direction of the storage chamber can be reduced. Moreover, piping space is provided in either the right or left of the control board accommodated in the hollow part of the heat insulation box back, and refrigerant | coolant piping is arrange | positioned in the said piping space. As a result, the connecting pipe is configured with a margin and sufficient elastic portion, the upper space of the second space portion can be reduced, and the step in the back direction can be reduced with respect to the depth of the interior top surface of the chamber. In particular, the pipe fixing part of the compressor and the pipe fixing part of the heat insulation box can be arranged at a distance, so that pipe vibration can be reduced and pipe breakage due to vibration during transportation or transportation of the compressor can be prevented. Can do. Furthermore, by storing the refrigerant piping including the dryer, the flow path control valve, and the like, which are the cooling system components, in the piping space, the piping configuration in the space above the reduced second top surface is facilitated.

  Moreover, the shelf position at the uppermost stage in the cabinet can be arranged at an appropriate height in accordance with the protruding steps, and a neat design with no unevenness is possible.

  In addition, it goes without saying that the inner volume and depth of the lower storage chamber are expanded.

  In addition to the refrigerator according to claim 1, the invention according to claim 2 is a shape in which the recess portion on the back surface of the heat insulating box is inclined so that the upper recess margin is large and the lower recess margin is small. The control board to be housed has a structure in which the mounting components with the height are gathered upward and matched to the shape of the indented part, so that even if the inner back of the uppermost storage chamber is tilted from the lower side to the upper side, it is uniform. The heat insulation wall thickness can be ensured. As a result, it is possible to reduce the depth of the upper warehouse, which is difficult to use, and to increase the depth of the warehouse as the lower level, and to reduce the level difference in the warehouse with respect to the back of the top surface of the warehouse.

  Moreover, in addition to the refrigerator of Claim 1 or 2, the invention of Claim 3 provided the air path space inside the right-and-left warehouse of the hollow part back surface of a heat insulation box, By the air path in a warehouse By arranging the space and the storage space for the control board and piping outside the cabinet in parallel, the inner volume is secured without creating an invalid space with uniform insulation wall thickness, and the back of the cabinet is flat with no irregularities Can be configured.

(Embodiment 1)
FIG. 1 shows a schematic cross-sectional view of the refrigerator according to Embodiment 1 of the present invention, and FIG. 2 shows a schematic rear view. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  In FIG. 1 and FIG. 2, the heat insulation box 1 comprised by heat insulating materials, such as hard foam urethane, is divided into the several heat insulation division, for example, the refrigerator compartment 2, drawer type vegetables from the top. The chamber 4 and the freezing chamber 3 are configured. Each heat insulation section is provided with a heat insulation door via a gasket 22. The refrigerator door 5, the vegetable compartment drawer door 7, and the freezer compartment drawer door 6 from above.

  The refrigerating compartment rotary door 5 is provided with a door pocket 23 as a storage space, and a plurality of storage shelves 8 are provided in the warehouse. A storage case 24 that can be pulled out is provided at the bottom of the refrigerator compartment 2.

  The refrigerator compartment 2 is normally set at 1 to 5 ° C. with the lower limit of the temperature at which it is not frozen for refrigerated storage. Further, the storage case 24 is set at a relatively low temperature, for example, −3 to 1 ° C. for improving the freshness of meat fish and the like. The vegetable room 4 is often set to a temperature setting of 2 ° C. to 7 ° C., which is the same as or slightly higher than that of the refrigerator room 2. It is possible to maintain the freshness of leafy vegetables for a longer period as the temperature drops.

  The freezer compartment 3 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 top part of the heat insulation box 1 is composed of a first top surface part 25 and a second top surface part 26 provided at a position lower than the first top surface part 25 on the back side. Therefore, the interior top surface of the refrigerator compartment has a shape with the second top surface portion 26 protruding.

  Further, a recess 27 is provided on the back surface of the heat insulating box 1. The recessed portion 27 is located below the second top surface portion 26 at a position corresponding to the back surface of the refrigerator compartment 2 which is the uppermost storage chamber. A control board 28 is accommodated in the recess 27 and is covered with a board cover 29.

  The refrigeration cycle is configured by connecting a compressor 16, a condenser 17, a decompressor 30 such as a capillary, a dryer 31 for removing moisture, and an evaporator 20 in an annular shape. The condenser 17 and the evaporator 20 are subjected to forced convection heat exchange between the machine room fan 18 and the cooling fan 21.

  In particular, when a plurality of evaporators are used properly according to the compartment configuration and the temperature setting configuration, flow path control means such as an electric three-way valve is used.

  Moreover, in addition to the forced convection type, the condenser 17 is installed in a pipe for naturally dissipating heat using the surrounding steel plate of the heat insulation box and a partition between the heat insulation doors in each room to prevent drip-proof. You may combine piping for performing.

  The compressor 16 which is a component of the refrigeration cycle is provided in a machine room 33 provided in the space above the second top surface, and the condenser 17 has a thin configuration such as a wire type, a fin coil type, and a spiral fin type. It is disposed in the space above the first top surface portion 25.

  The machine room fan 18 is arranged side by side with the compressor 16 in the machine room 33, and the condenser 17 and the compressor 16 are forcibly cooled by an air path (not shown). At this time, the air path is configured so that the flow of the wind flows from the condenser 17 to the compressor 16 so that the capacity of the condenser 17 does not deteriorate due to the heat effect of the compressor 16. The dryer 31 is disposed in the machine room 33 and is preferably provided at a location where the temperature influence is low or a location where fresh air is introduced in consideration of generation of flash gas due to reheating.

  Further, a top cover 34 is provided above the first and second top surface portions 25 and 26 so as to be removable with screws or the like.

  Moreover, the evaporator 20 which is a component apparatus of a refrigerating cycle is provided in the back part of the vegetable compartment 4 located in a middle stage with the cooling fan 18. FIG. Thereby, it is possible to maximize the internal volume and depth of the freezer compartment 3 which is the lowermost storage room.

  If the middle vegetable room 4 and the lowermost freezer room 3 have the opposite configuration, it is possible to maximize the internal volume and depth of the vegetable room.

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

  First, the operation of the refrigeration cycle will be described. The refrigeration cycle is operated by a signal from the control board 28 according to the set temperature in the refrigerator, and the cooling operation is performed. First, the high-temperature and high-pressure refrigerant discharged by the operation of the compressor 16 releases heat in the condenser 17 to be condensed and liquefied, and reaches the capillary 30. After that, the capillary 30 is decompressed while exchanging heat with the suction line 35, and becomes a low-temperature and low-pressure liquid refrigerant and reaches the evaporator 20.

  By the operation of the cooling fan 21, heat is exchanged with the air in the cabinet, and the refrigerant in the evaporator 20 is evaporated. Each room is cooled by distributing low-temperature cold air using a damper (not shown). When a plurality of evaporators are used, the refrigerant is supplied to the necessary evaporators by the flow path control means. The refrigerant exiting the evaporator 20 is sucked into the compressor 16 through the suction line 35.

  When the temperature of each chamber in the low temperature chamber is sufficiently lower than the set temperature, the operation of the compressor 16 is stopped.

  By disposing the machine room 33 on the top surface of the heat insulation box 1, the compressor 16 and the condenser 17 that are repeatedly operated in this manner are placed at the top, so that the heat insulation performance is reduced due to heat accumulation. It is advantageous for energy saving.

  Further, since the control board 28 is housed in the recessed portion 27 on the back surface of the heat insulating box 1, the number of components disposed in the machine chamber 33 can be reduced, and the second top surface portion 26 can be restrained from being drawn into the interior. Furthermore, the condenser 17 is provided in the space above the first top surface portion 25, and the arrangement height of the storage components such as the compressor 16 is positioned above the first top surface portion 25. In addition, the piping components are also disposed above. Since it can be done, it is possible to suppress the protrusion to the inside of the warehouse.

  Moreover, since the control board 28 is arrange | positioned under the 2nd top | upper surface part 26 in the back surface of the refrigerator compartment 2, the level | step difference in a warehouse back surface direction can be reduced.

  In addition, since the control board 28 can be arrange | positioned in the vicinity of the compressor 16, an electrical wiring can be shortened and it is effective in cost reduction.

  In particular, when an inverter compressor is used to reduce noise and save energy, it is a problem to suppress the generation of electromagnetic noise, and noise reduction is achieved by configuring short-distance electrical wiring that is particularly prone to noise. Is possible.

  By reducing the size of the inside of the cabinet, the storage shelf 8 can be arranged in accordance with the inside of the cabinet without wastefully increasing the uppermost shelf space, which is difficult to use.

  Further, by disposing the condenser 17 in a section different from the compressor 16, it is not affected by temperature, so that the capacity of the condenser 17 can be maximized and the power consumption can be reduced. .

  Further, by sufficiently turning the pipe connected to the compressor 16 above the compressor to have an elastic part, the vibration of the compressor is absorbed by the elastic part, and the pipe vibration can be reduced.

  Further, by using a vacuum heat insulating material (not shown) for the heat insulating wall constituting the second top surface portion 26, it is possible to reduce the thickness of the wall and to further reduce the amount of protrusion into the warehouse.

(Embodiment 2)
FIG. 3 shows a schematic cross-sectional view of the refrigerator in the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  In FIG. 3, the recess 27 on the back surface of the heat insulation box 1 has an inclined shape so that the upper recess 36 is large and the lower recess 37 is small, and the control board 28 to be accommodated is a high capacitor or a power transformer. By gathering the mounted parts upward and adopting a configuration that matches the shape of the recess, it is possible to ensure a uniform heat insulation wall thickness even if the rear surface of the refrigerator compartment is tilted forward from the bottom to the top. it can. As a result, it is possible to reduce the depth of the upper chamber, which is difficult to use, and to increase the depth of the chamber as the lower level is reached. . Furthermore, the unevenness can be further reduced by providing the R surface 38 at the connecting portion on the back of the inside of the refrigerator compartment 2.

(Embodiment 3)
4 and 5 show schematic rear views of the refrigerator according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  In FIG. 4, the control board 28 is offset and disposed in the recess 27 on the back surface of the heat insulating box 1, and a piping space 39 is provided in the left-right direction. The piping space 39 is in the space above the second top surface portion 26. It communicates with the machine room 33. The suction line 35 is taken out from the lower part of the piping space 39 and connected to the compressor 16 in the machine chamber 33. A plurality of capillaries 30 connected to a plurality of evaporators (not shown) are once turned upward once and then connected to a flow control valve 40 such as an electric three-way valve. The flow path control valve 40 is connected to the dryer 31 by piping. The dryer 31 and the flow path control valve 40 are fixedly accommodated in a piping space 39 by a clamp or the like. The control board 28 is provided with a board cover 29 and hermetically sealed. The recess 27 including the piping space 39 and the machine room 33 are provided so that an integral machine room cover 41 can be removed with a screw or the like, and this cover is removed at the time of service.

  As a result, the connecting pipe is configured with a margin and sufficient elastic portion, and the number of storage parts in the machine chamber 33 can be reduced, so that the space above the second space portion can be reduced. Therefore, since the back of the top surface of the refrigerator compartment 2 can be made smaller and the back surface is closer to the front by the amount of the recessed portion 27, the step in the back direction can be reduced.

  In particular, since the pipe fixing part of the compressor 16 and the pipe fixing part of the heat insulating box 1 can be arranged at a distance, pipe vibration can be reduced, and pipe breakage caused by vibration during operation of the compressor 16 or during transportation. Can be prevented.

  Further, since the straight portion can be secured in the piping space 39 as a configuration in which the welding connection portion of the suction line 35 and the capillary 30 is inserted from above in the vertical direction, assembly work and welding work are easy.

  Further, as shown in FIG. 5, the condenser 17 is provided in the machine chamber 33 configured to have a height equal to or lower than the first top surface portion 25, and the compressor 16 is offset and disposed in the machine chamber 33. . A machine room fan 18 is provided between the condenser 17 and the compressor 16. In particular, when such a top surface configuration is adopted, the space above the machine room 33 is insufficient, so that the effect of the piping space 39 is further increased.

  The same effect can be obtained even in a refrigeration cycle in which an evaporator and a capillary are connected together.

  Furthermore, if the compressor 16 is an inverter type and is operated at a low speed, the vibration of the compressor 16 becomes larger, and the effect is further increased.

  Even when a flammable refrigerant is used as the refrigerant, safety can be improved by sealing the control board 28 with the board cover 29. In addition, since the combustible refrigerant such as isobutane heavier than air is more likely to diffuse to the surroundings by natural convection even if it leaks, the safety is improved as the compressor is higher.

(Embodiment 4)
FIG. 6 shows a schematic front view of the refrigerator in the fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  In FIG. 6, the air passage space 42 is secured by providing recesses inside the left and right compartments of the recess portion 27 on the back surface of the heat insulating box 1, so that the air passage space 42 inside the warehouse and the recess portion 27 outside the compartment are arranged in parallel. By arranging in the above, the inner back surface can be ensured without making an ineffective space with a uniform heat insulation wall thickness, and the back surface inside the cabinet can be configured to be flat without unevenness. This makes it possible to realize a storage space that is clean and easy to use.

  As described above, the refrigerator of the present invention can ensure sufficient internal volume and depth of the lowermost storage room, and can reduce the amount of protrusion at the back of the top surface of the cabinet, so that it can be used for business purposes. It can also be applied to refrigerators and refrigerators such as freezers and showcases.

Schematic sectional view of the refrigerator in the first embodiment of the present invention. Schematic rear view of the refrigerator in the first embodiment of the present invention Schematic sectional view of the refrigerator in the second embodiment of the present invention. Schematic rear view of the refrigerator in the third embodiment of the present invention Schematic rear view of the refrigerator in the third embodiment of the present invention Schematic front view of the refrigerator in the fourth embodiment of the present invention Schematic sectional view of a conventional refrigerator

Explanation of symbols

1 Insulated box 2 Refrigerated room (storage room)
3 Freezing room (storage room)
4 Vegetable room (storage room)
8 Storage Shelf 16 Compressor 17 Condenser 20 Evaporator 25 First Top Surface Part 26 Second Top Surface Part 27 Recessed Part 28 Control Board 30 Capillary (Decompressor)
31 Dryer 33 Machine room 35 Suction line 36 Upper recess allowance 37 Lower recess allowance 39 Piping space 40 Flow path control valve 41 Airway space

Claims (3)

A first top surface portion formed of a heat insulating wall, and a second top formed of a heat insulating wall provided at a position lower than the first top surface portion on the back side of the refrigerator main body behind the first top surface portion. A heat insulating box having a top surface portion and a compressor disposed in an upper space portion of the second top surface portion, and forming a recess portion directly below the second top surface portion, and the recess portion Is a refrigerator in which a control board is housed, a piping space is provided on either the left or right side of the control board housed in the depression, and at least a part of the refrigerant pipe is disposed in the piping space .   2. The refrigerator according to claim 1, wherein the hollow portion has an inclined shape so that an upper hollow portion is large and a lower hollow portion is small.   The refrigerator of Claim 1 or 2 which provided the air path space in the left-right warehouse inside of the said hollow part.

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