JP2006153359A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the impairing of heat insulating performance caused by dew condensation on a suction pipe and humidity absorption to a heat insulating material in a refrigerator where a compressor is mounted on a top face. <P>SOLUTION: This refrigerator comprises a freezing cycle formed by circularly connecting the compressor 16 mounted in a recessed portion 10 at a rear part of the top face of a heat insulating housing 1, a condenser 17, a capillary 32, an evaporator 20 and the suction pipe 33, and the suction pipe 33 is buried in a heat insulating body 24 in a state that its one side is projected from a lower portion of the recessed portion 10, and it is mounted to exchange the heat with the capillary 32, thus the movement of heat occurs by heat exchange between a refrigerant flowing in the capillary 32 of a comparatively high temperature and the suction pipe 33, the dew condensation on a surface of the suction pipe 33 can be prevented, the dew condensation water is transferred to the pipe and intruded into the heat insulating body 24, and the impairing of heat insulating performance caused by absorption of moisture can be prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 more energy-saving from the viewpoint of protecting the global environment, and to be improved in usability and storage.

  In the conventional refrigerator of this type, for the purpose of increasing the storage capacity of the storage room arranged at the bottom, a recessed part that is recessed so that the back of the uppermost part of the storage room of the heat insulation box is lowered. The method of taking and providing the component apparatus of a refrigerating cycle in the recessed part was taken (for example, refer patent document 1).

  FIG. 6 shows a configuration of a conventional refrigerator described in Patent Document 1. As shown in FIG.

  As shown in FIG. 6, 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. . 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 by a roller (not shown) 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 recessed so that the uppermost back part of the refrigerator compartment 2 is lowered. The left and right sides of the recessed portion 10 are closed by the left and right walls of the heat insulating box 1 and open upward and to the back. The opened portion of the recessed portion 10 includes an upper plate 13 and a back plate 14 that is substantially perpendicular to the upper plate 13. It is covered with the recessed part cover 15 which consists of these. In addition, the dent 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 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 19 for heat dissipation.

  The evaporator 20 which is a component device of the refrigeration cycle is disposed with a cooling fan 21 at the back of the freezer compartment 3, 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 above-described conventional configuration, the compressor is disposed in the recessed portion that opens to the top surface. Therefore, when the piping connecting the compressor and the evaporator protrudes from below the recessed portion, The pipe condensation caused by the low-temperature and low-pressure refrigerant returning from the evaporator is transmitted through the pipe by gravity and moves into the heat insulator. The heat insulator has a problem that the heat insulation performance is lowered by absorbing moisture, and the performance may be deteriorated. Measures such as tight sealing at the outlet from the heat insulator as a measure to prevent this pipe dew condensation are costly, and in the long term, pinholes occur in the seal due to vibration of the pipe and hardening of the seal member. Or reliability deteriorates due to deterioration of the sealing member itself.

  Furthermore, since the exit portion of the heat insulator serving as a fixed portion of the pipe becomes a fixed end of vibration generated from the compressor, it becomes a portion where a large amount of stress is generated, and it is difficult to ensure the seal reliability. In particular, when the compressor is disposed on the top surface, the vibration of the compressor may be greatly transmitted, and it becomes more difficult to ensure the sealing performance of the pipe fixing portion.

  The present invention solves the above-described conventional problems, and provides a highly reliable refrigerator that prevents condensation of a compressor connection pipe, prevents moisture absorption to a heat insulator, and prevents performance deterioration of the heat insulation box. With the goal.

  In order to solve the above-described conventional problems, the refrigerator of the present invention includes a heat insulating box composed of an inner box, an outer box, and a foam-filled heat insulating body, and a dent at the rear of the top surface provided in the heat insulating box. And a compressor disposed in the recess, and a refrigeration cycle in which the compressor, the condenser, the capillary, the evaporator, and the suction pipe are connected in an annular shape, and the suction pipe is connected to the heat insulator. One end protrudes into the inner box and is connected to the evaporator, and the other end protrudes from below the recess and is connected to the compressor, and is embedded in the heat insulator of the suction pipe. A heat exchanging portion in which the suction pipe and the capillary are arranged so as to be capable of exchanging heat is provided in the buried portion.

  As a result, when the temperature of the suction pipe decreases due to the low-temperature and low-pressure refrigerant returning from the evaporator, heat exchange occurs due to heat exchange with the refrigerant flowing through the relatively high-temperature capillary, the temperature of the suction pipe rises, and the suction pipe is When the temperature falls below the saturation temperature, moisture in the air condenses on the surface of the suction pipe. However, surface condensation can be prevented because the suction pipe temperature can be kept above the ambient temperature by heat exchange with the capillary that is relatively hot. Therefore, it is possible to prevent surface condensation from being transferred to the heat insulating body through the pipe due to its own weight, and thus it is possible to prevent a decrease in heat insulating performance due to moisture absorption of the heat insulating body.

  The refrigerator of the present invention eliminates the storage space in the upper and lower part that is difficult to use without reducing the internal volume of the refrigerator, and prevents the condensation of the suction pipe while increasing the storage amount of the easy-to-use lower drawer storage room Thus, it is possible to provide a highly reliable refrigerator that does not deteriorate performance due to moisture absorption of the heat insulator.

  The invention according to claim 1 is a heat insulating box composed of an inner box, an outer box, and a foam-filled heat insulator, a recessed portion at the rear of the top surface provided in the heat insulating box, and the recessed portion. A compressor, a compressor, a condenser, a capillary, an evaporator, and a refrigeration cycle formed by annularly connecting a suction pipe, wherein the suction pipe is embedded in the heat insulator and has one end at the end It protrudes into the inner box and is connected to the evaporator, and the other end protrudes from below the recess and is connected to the compressor, and in the portion embedded in the heat insulator of the suction pipe A heat exchanging portion is provided in which the suction pipe and the capillary are arranged so as to be capable of exchanging heat.

  As a result, when the temperature of the suction pipe is lowered by the low-temperature and low-pressure refrigerant returning from the evaporator, heat is transferred by exchanging heat with the refrigerant flowing through the relatively high-temperature capillary, and the temperature of the suction pipe rises.

  When the suction pipe becomes below the saturation temperature, moisture in the air condenses on the surface of the suction pipe. Since the suction pipe temperature can be secured above the ambient temperature by heat exchange with the relatively high temperature capillary, surface condensation is prevented, and it is possible to prevent the pipe from being transferred by its own weight and moving into the insulation body. Prevents deterioration of heat insulation performance due to moisture absorption.

  In the invention according to claim 2, in the invention according to claim 1, since the heat exchanging portion between the suction pipe and the capillary is extended to the portion protruding into the recess portion of the suction pipe, sudden load fluctuations, etc. Heat exchange with relatively hot capillaries to the outside of the heat insulator even when the temperature of the suction pipe is temporarily reduced by the It can penetrate into the inner part of the heat insulator by its own weight and prevent heat insulation performance.

  In addition, heat exchange with the suction pipe is possible from a location relatively close to the capillary inlet, and the heat exchange distance can also be made relatively long, so that the amount of heat transfer from the suction pipe to the capillary increases, and the refrigeration effect The energy-saving effect by increase of can be expected.

  The invention according to claim 3 is the invention according to claim 2, wherein a heat storage member attached so as to be capable of exchanging heat with the capillary is provided in the heat exchanging portion protruding from the recess portion of the suction pipe. A uniform heat exchange amount can be ensured by relieving temperature fluctuation and storing a certain amount of heat. Therefore, even if the temperature of the suction pipe temporarily drops due to load fluctuations, the temperature of the suction pipe near the outlet of the insulator is not lowered, and the condensed water in the pipe penetrates into the inner part of the insulator due to gravity and deteriorates the heat insulation performance. To prevent it.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, a fan is provided in the recessed portion, and an air passage is formed in the internal space of the recessed portion, and the machine room air passage is provided. Since the suction pipe is arranged inside, the re-evaporation of the condensed water is promoted by forced convection even if the temperature of the suction pipe decreases and temporary condensation occurs. Furthermore, forced convection of air that has become hot through relatively high-temperature refrigeration cycle components such as a compressor and a condenser further promotes re-evaporation and has a great effect.

(Embodiment 1)
FIG. 1 shows a schematic sectional view of a refrigerator in Embodiment 1 of the present invention, FIG. 2 shows a schematic development view of a heat insulating box of the refrigerator, and FIG. A schematic diagram is shown. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  1 to 3, a heat insulating box 1 is a heat insulating body 24 that foams and fills a space formed by an inner box 22 in which a resin body such as ABS is vacuum-formed and an outer box 23 using a metal material such as a pre-coated steel plate. It is equipped with a heat insulating wall. As the heat insulator 24, for example, a hard urethane foam, a phenol foam, a styrene foam, or the like is used. Use of hydrocarbon-based cyclopentane as the foaming material is better from the viewpoint of preventing global warming.

  The heat insulation box 1 is divided into a plurality of heat insulation sections, and has a structure in which the upper part is a revolving door type and the lower part is a drawer type. From the top, there are a refrigerator compartment 2, a drawer-type vegetable compartment 4, and a drawer-type freezer compartment 3. Each heat insulation section is provided with a heat insulation door via a gasket 25. The refrigerator door 5, the vegetable compartment drawer door 7, and the freezer compartment drawer door 6 from above.

  The refrigerator compartment revolving door 5 is provided with a door pocket 26 as a storage space, and a plurality of storage shelves 8 are provided in the warehouse. A storage case 27 is provided at the bottom of the refrigerator compartment 2.

  Further, the outer box 23 of the heat insulation box 1 is a machine that forms a shell 28 in which the back of the top surface is cut and a U-bent steel plate is bent, a bottom panel 29, a back panel 30, and a recess 10 in which the back of the top surface is recessed. The chamber panel 31 is assembled to ensure sealing performance. The machine room panel 31 is formed by drawing a steel plate, and the corner portion has an R shape in order to improve workability. The R shape secures a flow path at the branching or joining portion of the heat insulating body 24 to be foam-filled to improve fluidity, and can prevent generation of voids due to insufficient filling.

  In addition, the machine room panel 31 has a deepest arrangement part of the compressor 16 and has a narrowed shape toward the left and right ends. Sex is improved.

  Further, the machine room panel 31 is provided with a plurality of air vent holes (not shown) on each surface, and can prevent the generation and deformation of voids due to residual air without impairing the appearance and the inside view.

  Since the machine room panel 31 is drawn, it is advantageous in terms of man-hours because it requires less sealing parts for foam filling, and if a similar shape is formed by sheet metal processing, the cost of the drawing die is low. In addition, it is possible to increase the finish and dimensional accuracy without wrinkling.

  Further, the inner box 22 is slightly smaller than the outer box 23, and the back portion of the inner box 22 is recessed inward. By incorporating the inner box 22 in the outer box 23, a heat insulator is provided between the outer box 23 and the inner box 22. A space in which 24 is foam-filled is formed in the heat insulating box 1. Accordingly, the right and left parts of the machine room panel 31 are also filled with the heat insulating body 24 to form a heat insulating wall.

  The refrigeration cycle includes a compressor 16 disposed in the recess 10, a condenser 17 provided on the top surface of the shell 28, a capillary 32 that is a decompressor, a dryer (not shown) that removes moisture, The evaporator 20 provided with the cooling fan 21 arranged in the vicinity on the back of the vegetable compartment 4 and the freezer compartment 3 and the suction pipe 33 are connected in an annular shape.

  The condenser 17 has a thin copper pipe and is covered with a top duct cover 34. The top duct cover 34 is provided with a suction opening 35 on the front and side walls, and a discharge opening 36 on the back. A machine room fan 18 is provided in the recess 10 in the vicinity of the compressor 16, and a discharge opening 36 of the top duct cover 34 is provided on the opposite side of the machine room fan 18 located in the vicinity of the compressor 16. .

  The capillary 32 and the suction pipe 33 are copper pipes having substantially the same length, and are soldered so as to be able to exchange heat, leaving the end portions. In order to ensure the length of the heat exchanging part 37, the heat exchanger 37 is meandered to be compact and arranged in the middle of the inner box 22 and the rear panel 30 so that the meandering part comes to the back of the refrigerator compartment 2. 24 embedded. One end of the capillary 32 and the suction pipe 33 protrudes from the inner box 22 and is connected to the evaporator 20, and the other end extends upward from a notch (not shown) provided in the flange of the machine room panel 31. And are connected to the condenser 17 and the compressor 16 respectively.

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

  First, the temperature setting and cooling method of each heat insulation section will be described. 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 27 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 long period of time as the temperature is lowered so as not to freeze.

  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.

  Each chamber is divided by a heat insulating wall in order to efficiently maintain different temperature settings. However, as a method of improving the heat insulating performance at a low cost, it is possible to perform foam filling together with the heat insulating body 24. Compared to the use of a heat insulating member such as polystyrene foam, the heat insulating performance can be increased by about twice, and the storage volume can be increased by thinning the partition.

  Next, the operation of the refrigeration cycle will be described. The cooling operation is started and stopped by signals from a temperature sensor (not shown) and a control board according to the set temperature in the cabinet. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 16 dissipates heat in the condenser 17 to be condensed and liquefied, and is decompressed by the capillary 32 to become a low-temperature and low-pressure liquid refrigerant and reaches the evaporator 20.

  In the condenser 17, forced convection heat radiation is performed by an air passage formed by the top duct cover 34 by the operation of the machine room fan 18. After sucking air from the suction openings 35 provided on the front and side surfaces and exchanging heat with the condenser 17, the compressor 16 is cooled and discharged from the discharge openings 36.

  At this time, the air passing through the discharge opening 36 exchanges heat with the condenser 17 and the compressor 16 and is discharged to the outside air at a relatively high temperature. In addition, for the case where the back surface is installed to be pressed tightly against the indoor wall, the discharge opening 36 is more preferably disposed with a clearance through which the discharge air passes between the back surface side wall surface.

  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 with a damper (not shown).

  The refrigerant exiting the evaporator 20 is sucked into the compressor 16 through the suction pipe 33. At this time, since the suction pipe 33 is soldered to the capillary 32 so as to be capable of exchanging heat and is embedded in the heat insulator 24, heat is transferred from the low-temperature suction pipe 33 to the high-temperature capillary 32 without escape of heat to the surroundings. Since the capillary 32 is cooled in the process of depressurizing the refrigerant, the specific enthalpy is lowered and the refrigeration effect is increased. In the suction pipe 33, the refrigerant temperature rises and can be made substantially equal to or higher than the ambient temperature at the outlet. Since the refrigerant temperature in the suction pipe 33 rises, the heat loss in the process of being sucked into the compressor 16 is small, and the efficiency is improved. The refrigeration cycle that generates the refrigeration temperature is a very low refrigerant temperature of −20 ° C. or less in the evaporator 20, so that the effect of reducing heat loss is particularly great.

  Furthermore, since the temperature of the suction pipe 33 outside the heat insulating body 24 can be almost equal to or higher than the ambient temperature, it is possible to prevent dew condensation on the pipe surface under normal operating conditions. It is possible to prevent a decrease in heat insulation performance due to movement and moisture absorption.

  In addition, since the capillary 32 is relatively hot, if it is placed in a low temperature region, heat is dissipated in addition to heat exchange with the suction pipe 33, resulting in heat loss in the refrigeration cycle and a heat load on the inside of the cabinet, reducing energy saving. However, since the capillary 32 and the suction pipe 33 are arranged on the back surface of the refrigerator compartment 2 having a high internal temperature, it is possible to ensure energy saving without greatly increasing heat loss and heat load on the internal storage. In particular, the heat exchanging portion 37 has a sufficient length and is meandered in the back of the refrigerator compartment 2 so as to be stored compactly, so that energy saving and a sufficient temperature rise of the suction pipe 33 can be obtained. Since the ascending gradient is provided and the trap is not provided, the liquid refrigerant and the refrigerating machine oil are not retained, and the performance influence such as pressure loss is not caused.

  In addition, since the suction pipe 33 is disposed in the downstream portion of the air passage of the machine room fan 18, the air exchanged with the compressor 16 and the condenser 17 exchanges heat with the suction pipe, thereby further preventing condensation. is there. In particular, by arranging it near the discharge opening 36 provided in the top duct cover 34, reliable air convection is generated around the suction pipe 33, and condensation can be prevented.

  A suction opening 35 is added to the back surface of the top duct cover 34, which is the upstream side of the air passage of the machine room fan 18, and a suction pipe 33 is arranged in the vicinity thereof to prevent condensation on the suction pipe 33 due to forced convection. You can go. Thus, since the suction pipe 33 exchanges heat with fresh air, there is no possibility of overheating due to a temporary rise in the temperature of the compressor 16 or the condenser 17, which is advantageous in terms of reliability.

  In addition, in order to minimize the pulling in the interior of the recess 10, the condenser 17 is thin and disposed on the top surface. However, as a box-shaped configuration, the compressor 16 and the machine room fan 18 are provided in the recess 10. When arranged in parallel, the internal volume in the vertical direction can be further expanded. Further, if the condenser 17 has a fin tube type, a wire tube type, a spiral fin tube type, etc., and its heat radiation capacity is increased by increasing the outer surface area, it is effective in reducing the size of the condenser 17 and saving energy.

  If HC600a, which is advantageous in terms of preventing global warming, is used as the refrigerant, the specific volume of the refrigerant gas is large and the volumetric flow rate increases, so the flow rate of the heat exchange section also increases, heat transfer is promoted, and the temperature of the suction pipe 33 is increased. The effect is improved against the increase of the freezing effect due to the rise and cooling of the capillary 32.

  Further, by using a compatible mineral oil for the refrigerating machine oil, an oil film that hinders heat transfer is not formed on the wall surface of the pipe, so that heat transfer is promoted and refrigeration is achieved by increasing the temperature of the suction pipe 33 and cooling the capillary 32. The effect improves with respect to the increase in effect.

  In addition, although the condenser 17 was demonstrated with the forced air cooling type, the natural air cooling type comprised with the copper piping affixed with good heat transfer inside the outer case 23 may be sufficient, and between each room heat insulation door bodies. You may combine the copper piping for arrange | positioning to a partition and performing drip-proof prevention.

  In addition, by using a flow path control means such as an electric three-way valve, a plurality of evaporators according to the partition configuration and temperature setting configuration are selectively used, a plurality of capillaries are switched, and gas is cut while the compressor 16 is stopped. Energy savings.

  In addition, although the temperature section is divided into three sections, there is no problem if the other is replaced if the refrigerator compartment is above, and an independent ice making room, a switching room, etc. may be additionally divided.

(Embodiment 2)
FIG. 4 shows a schematic diagram of the main part of the rear piping 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. 4, the suction pipe 33 extends a heat exchanging portion 237 with the capillary 32 from the inside of the heat insulator 24 to the outside. The suction pipe 33 protrudes to the outside of the heat insulator 24 and is then bent in the lateral direction. Further, the heat exchanging portion 237 is extended to a place beyond the bent portion of the suction pipe 33. As a result, condensation due to a temperature drop at the rising portion of the suction pipe 33 is prevented, and even if condensation occurs at the tip of the heat exchanging portion 237, its own weight is dropped onto the heat insulator 24 and performance is not deteriorated.

  The capillary 32 is a pressure reducer in which the liquid refrigerant flows while reducing the pressure inside the narrow tube. The refrigerant temperature also decreases with the pressure reduction, so that the temperature is high at the pressure reducing inlet and the temperature is low at the outlet. It has become. In the vicinity of the inlet, there is a gradual pressure reduction and a temperature drop, but the pressure reduction and the temperature drop suddenly occur after passing a so-called bubbling point.

  Therefore, by performing heat exchange with the suction pipe 33 in the vicinity of the inlet portion of the capillary 32, a large temperature difference can be obtained, so that the heat exchange amount can be increased. By extending the heat exchange part 237 to the inside of the recessed part 10 outside the heat insulator 24, heat exchange at the inlet part of the capillary 32 is promoted, and the heat exchange amount can be increased. As a result, energy saving and the temperature increase of the suction pipe 33 are made possible.

  In addition, although the heat exchange part is performed by soldering, the pressure welding by coating | covering materials like a heat contraction tube may be sufficient.

(Embodiment 3)
FIG. 5 shows a schematic diagram of the main part of the rear piping 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. 5, the suction pipe 33 and the capillary 32 are disposed in the heat insulator 24 so as to be able to exchange heat by soldering or the like, and one end protrudes from the heat insulator 24 into the recess 10. Each end is connected to a condenser 17 and a compressor 16 to constitute a refrigeration cycle.

  A heat storage member 38 is wound around the portion of the suction pipe 33 and the capillary 32 that protrudes outside the heat insulator 24 so that heat can be exchanged. The heat storage member 38 only needs to have a large heat capacity such as butyl rubber. In addition, a soft material such as butyl rubber is effective for vibration isolation, and has good adhesion and is more suitable. Moreover, since it does not touch outside air if it sticks so that the welding connection part of piping may be covered, corrosion degradation etc. can be suppressed significantly.

  As a result, condensation due to a temperature drop at the rising portion of the suction pipe 33 is prevented, and even if condensation occurs at the tip of the heat exchanging portion 337, its weight is dropped on the heat insulator 24 and performance is not deteriorated.

  In addition, since the heat storage member 38 has a large heat capacity, the pipe temperature can be kept constant against a temporary temperature drop of the suction pipe 33, and the performance can be kept stable.

  Note that if the capillary 32 is configured to wind a plurality of turns around the heat storage member 38, the amount of heat transfer is further increased, and further energy saving and a rise in the temperature of the suction pipe 33 are possible.

  As described above, the refrigerator according to the present invention can provide a highly reliable refrigerator that prevents condensation of the suction pipe and does not deteriorate performance due to moisture absorption of the heat insulator, and can be applied to cooling devices other than the refrigerator.

Schematic sectional view of the refrigerator in the first embodiment of the present invention. Schematic development view of the heat insulation box of the refrigerator in Embodiment 1 of the present invention Schematic diagram of main part of rear piping of refrigerator in embodiment 1 of the present invention Schematic diagram of main part of rear piping of refrigerator in embodiment 2 of the present invention Schematic diagram of main part of rear piping of refrigerator in embodiment 3 of the present invention Schematic sectional view of a conventional refrigerator

Explanation of symbols

1 Insulation box 2 Refrigerated room (upper storage room)
3 Freezing room (lower storage room)
4 Vegetable room (lower storage room)
5 Refrigerating Room Revolving Door 6 Freezing Room Drawer Door 7 Vegetable Room Drawer Door 10 Recess 16 Compressor 17 Condenser 18 Machine Room Fan 20 Evaporator 21 Cooling Fan 22 Inner Box 23 Outer Box 24 Heat Insulator 31 Machine Room Panel 32 Capillary 33 Suction piping 34 Top duct cover 35 Suction opening 36 Discharge opening 37, 237, 337 Heat exchange section 38 Heat storage member

Claims (4)

  A heat insulating box composed of an inner box, an outer box, and a foam-filled heat insulating body, a recessed portion at the rear of the top surface provided in the heat insulating box, a compressor disposed in the recessed portion, and the compression A refrigeration cycle in which a machine, a condenser, a capillary, an evaporator, and a suction pipe are connected in an annular shape, and the suction pipe is embedded in the heat insulator and has one end protruding into the inner box and the evaporator. The other end protrudes from below the recess and is connected to the compressor, and the suction pipe and the capillary exchange heat at a portion embedded in the heat insulator of the suction pipe. A refrigerator provided with a heat exchanging portion arranged as possible.   The refrigerator according to claim 1, wherein a heat exchanging portion between the suction pipe and the capillary is extended to a portion protruding into the recess of the suction pipe.   The refrigerator according to claim 2, wherein a heat storage member attached so as to be capable of exchanging heat with the capillary is provided in a heat exchanging portion protruding in a recess portion of the suction pipe.   The refrigerator as described in any one of Claim 1 to 3 which provided the fan in the recessed part, comprised the air path in the interior space of the said recessed part, and has arrange | positioned suction | inhalation piping in the said machine room air path.

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