JP2007064596A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To configure an efficient and rational refrigeration cycle that increases the storage volume of the lowest storage compartment and increases the efficiency of storage by mounting a compressor above. <P>SOLUTION: The refrigerator has the compressor mounted at the back of the ceiling of the highest storage compartment, which is a dead space unreachable even by tiptoeing, so that the refrigeration cycle is configured to increase the storage volume of the lowest storage compartment, increase the efficiency of storage, promote heat radiation from the compressor positioned in the ceiling, which is relatively open, and streamline and rationalize heat radiation from a radiating pipe as a condenser. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a refrigerator in which a compressor is placed behind the top surface.

  In recent years, refrigerators have become more energy-saving from the viewpoint of protecting the global environment, and are required to be small and can be used in large quantities, so to speak, space-saving, large capacity, and improved usability and storage.

  In the prior art, in order to realize a refrigerator that can be placed small and large, a pipe that serves as a condenser is arranged inside the heat insulation box, thereby effectively utilizing the space that does not affect the storage volume ( For example, see Patent Document 1).

  As shown in FIGS. 13 and 14, the refrigerator main body 1 is composed of an outer box 2, an inner box 3, a foam heat insulating material 4 filled between them, and a machine room 8 at the bottom of the main body 1. The compressor 9 and the blower 10 that dissipates heat generated from the compressor 9 are disposed in the machine room 8, and the rear surface of the machine room 8 is covered with the cover 15.

  In addition, a cooler chamber 5 is provided on the back of the inner box 3, a cooler 6 that generates cool air in the cooler chamber 5, and a blower 7 that forcibly circulates the generated cool air are disposed, and the discharge of the compressor 9 A high-pressure side pipe constructed by connecting serially a heat-dissipating pipe 11 that also serves as a condenser and a capillary tube is connected between the inlet side of the cooler 6 and the inlet side of the cooler 6. A low-pressure side pipe constituted by connecting in series a suction pipe to which the capillary tube is attached is connected between the two. The heat radiating pipe 11 also serving as the condenser is embedded in the foam heat insulating material 4 on the back of the refrigerator body 1.

  FIG. 15 illustrates the refrigeration cycle. The compressor 9, the heat radiating pipe 11, the capillary tube 12, and the cooler 6 are sequentially connected by a suction pipe 13 to form an annular closed circuit.

In the above configuration, the refrigerant that has passed through the cooler 6 is compressed by the compressor 9 and becomes a high-temperature, high-pressure gaseous refrigerant. This gaseous refrigerant dissipates heat through the heat radiating pipe 11 and becomes a medium-temperature, high-pressure liquid refrigerant. Subsequently, the liquid refrigerant is depressurized by the capillary tube 12 and then evaporated while passing through the cooler 6 to become a low-temperature and low-pressure refrigerant gas, thereby forming a heat exchange function in each compartment. Thereafter, the refrigerant is sucked into the compressor 9 again in a gas state, thereby completing the refrigeration cycle.
JP 2002-364975 A

  However, in the above conventional configuration, since the machine room for storing the compressor is located behind the bottom surface of the refrigerator main body, the storage volume of the lowermost storage room is small, and the storage space that cannot be reached by the uppermost storage room As a result, the storage was not necessarily good.

  The present invention solves the above-described conventional problems, and places a compressor behind the top surface of the uppermost storage chamber, which is an invalid space that does not reach even if it is stretched back, and stores the lowermost storage chamber. Increased volume and storage capacity, and also promoted heat dissipation of the compressor located on the top, which is relatively easy to open, and formed a refrigeration cycle that can efficiently and rationally dissipate heat from the heat dissipation pipe as a condenser. The object is to provide a refrigerator.

  A heat insulating box, a recessed portion formed one step lower than the top surface behind the top surface of the heat insulating box, a compressor, a condenser and an evaporator provided in the heat insulating box, and pipes connecting the respective In the refrigerator having a refrigeration cycle in which a series of refrigerant flow paths are formed in order, the compressor is housed in the recess, and the piping is disposed at least on the front surface and the back surface of the heat insulating box.

  The refrigerator of the present invention has a compressor installed behind the top surface of the uppermost storage room, which is an invalid space that does not reach even if it is stretched back, and increases the storage capacity of the lowermost storage room, improving the storage capacity. Thus, it is possible to form a refrigeration cycle that can promote heat dissipation of the compressor located on the top surface that is relatively easy to open, and can efficiently and rationally dissipate heat from the refrigerant pipe as a condenser.

  The invention according to claim 1 is a heat insulating box, a recessed portion formed one step lower than the top surface behind the top surface of the heat insulating box, a compressor, a condenser, and evaporation provided in the heat insulating box. And a refrigerator having a refrigeration cycle in which a series of refrigerant passages are formed by sequentially providing a container and a pipe connecting the respective containers, and storing the compressor in the recess, and the pipe is at least a front surface and a rear surface of the heat insulation box Therefore, it is possible to efficiently promote heat dissipation and further increase the efficiency of the refrigeration cycle. In addition, the actual installation situation of the refrigerator is often installed without gaps on the back, and the back of the refrigerator may reduce air convection and lower the surface temperature. The temperature can be raised and condensation can be prevented.

  The invention according to claim 2 is a heat insulating box, a recessed portion formed one step lower than the top surface behind the top surface of the heat insulating box, a compressor, a condenser, and evaporation provided in the heat insulating box. And a refrigerator having a refrigeration cycle in which a series of refrigerant passages are formed by sequentially providing a container and a pipe connecting the respective containers, and storing the compressor in the recess, and the pipe is at least a front surface and a rear surface of the heat insulation box The route through which the refrigerant flows passes from the back surface to the front surface, and further passes through the back surface, and can efficiently promote heat dissipation and increase the efficiency of the refrigeration cycle. Also, by installing a high-temperature refrigerant pipe immediately after coming out of the compressor on the back side, the refrigerant will be relatively cold when it flows through the front pipe that is easy to touch, and the pipe temperature at the easy-to-touch position will be lowered. it can.

  The invention according to claim 3 is a heat insulating box, a recess configured to be one step lower than the top surface behind the top surface of the heat insulating box, a compressor and an evaporator provided in the heat insulating box, and the In a refrigerator having a refrigeration cycle in which a series of refrigerant flow paths are formed by sequentially providing a condenser and pipes connecting the condensers in the lower part of the heat insulation box, the compressor is housed in the recess, and the pipes are at least insulated. Arranged on the front and back of the box, the path through which the refrigerant flows passes through the condenser from the back, then passes through the front, and then passes through the back, further promoting heat dissipation and increasing the efficiency of the refrigeration cycle. be able to. Even if the load on the refrigeration cycle is increased in summer or when the number of doors is increased or decreased by increasing the capacity of the radiator, it can be handled relatively easily.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the welded portion of each pipe is configured near the lower portion of the heat insulating box, and efficiency when the refrigerator is assembled. And improve serviceability.

  The invention according to a fifth aspect is the invention according to any one of the first to third aspects, wherein the welded portion of each pipe is formed near the upper portion of the heat insulating box. By concentrating the welding of all the pipes on the top, the efficiency when assembling the refrigerator can be increased.

  The invention according to claim 6 is the invention according to any one of claims 1 to 3, wherein the pipe installed on the back surface is integrated with the back plate constituting the outer box by using a heat radiation promoting means. In the configuration, it is possible to efficiently promote heat dissipation and increase the efficiency of the refrigeration cycle. Moreover, by forming integrally with a backplate, even when the heat insulating material of a refrigerator main body is foamed, a fixed heat radiation amount can be ensured without variation.

  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)
1 is a front view of a refrigerator according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a refrigerant piping configuration diagram of the refrigerator according to the embodiment. 4 is a position configuration diagram of a high-pressure pipe of the refrigerator in the same embodiment, FIG. 5 is a front view of a recessed portion of the heat insulating box in the same embodiment, and FIG. 6 is a recessed portion of the heat insulating box in the same embodiment. FIG. 7 is an exploded bottom view of the heat insulation box in the same embodiment, FIG. 8 is a rear view of the heat insulation box in the same embodiment, and FIG. 9 is a view in the same embodiment. The recessed part block diagram of a heat insulation box is shown.

  1 to 9, the refrigerator main body 30 includes a heat insulating box 31 divided into a plurality of heat insulating sections and a door provided in each heat insulating section. 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 chambers, and has a structure of a refrigeration chamber 40, an ice making chamber 41, a switching chamber 42, a vegetable chamber 43, and a freezing chamber 44 from above, and a plurality of compartments dividing each storage chamber. A partition wall 45 is provided, and 45a, 45b, 45c, and 45d are provided from the top. For example, the partition wall 45 d is a thermally insulated wall and partitions the vegetable compartment 43 and the freezing compartment 44. A front opening of each heat insulating section is partitioned by each partition wall and a front edge portion 101 of the heat insulating box 31, and a heat insulating door is provided in each front opening via a gasket (not shown). From the top, the refrigerator door 40a, the ice making door 41a, the switching chamber door 42a, the vegetable compartment door 43a, and the freezer compartment door 44a.

  Next, each storage chamber of the heat insulation box 31 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 storing the compressor 52 projects upward from the storage chamber, and a plurality of shelves 70 for organizing and storing food and the like are provided. Inside the refrigerator compartment door 40a, a plastic bottle or the like is provided. A plurality of pockets 71 for storing beverages are provided. A storage case 72 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. to generate and store ice. The inside of the refrigerator is provided with an ice making mechanism 73 having an ice making tray for generating ice, and is configured to accommodate an ice storage container 74 for storing the produced ice and to be pulled out by a rail (not shown) or the like. Yes.
The switching chamber 42 is set to, for example, a refrigerated chamber set at about 3 ° C, a chilled chamber set at about 1 ° C, a partial chamber set at about -1 ° C to about -3 ° C, and about -7 ° C. It is used by switching as a soft freezer, a freezer set at about -18 ° C.

  The vegetable room 43 is generally set to 2 ° C. to 7 ° C., which is the same as or slightly higher than the temperature of the refrigerated room 40, and the freshness of the leafy 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 75 that can organize and store food such as vegetables, and can be pulled out to the front with a rail (not shown).

  The freezer compartment 44 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 76 that can organize and store foods, and is configured to be pulled out by a rail (not shown) or the like.

  A cooling chamber 80 is provided on the back of the vegetable compartment 43 and the freezing compartment 44, and the cooling compartment 80 partitions the vegetable compartment 43 and the freezing compartment 44 by a partition wall 45e having heat insulation properties. The vegetable compartment 43 and the freezer compartment 44 are partitioned by a partition wall 45d having heat insulation properties.

  The cooling chamber 80 is provided with an evaporator 83 for exchanging heat in the cabinet to convert it into cold air, and a cooling fan 84 for sending the cold air to each storage chamber, and is attached to the evaporator 83 during cooling. A defrosting device 85 configured with a heater or the like for defrosting the frost is provided. The evaporating dish 86 for storing defrosted water is configured to be disposed on the bottom surface of the heat insulating box 31.

  Such a refrigerator is provided with a refrigeration cycle as shown in FIG. 3, and is configured such that the refrigerant sealed in the compressor 52 circulates in the refrigeration cycle. Hereinafter, the refrigeration cycle will be described.

  The refrigeration cycle is entirely composed of a sealed space, a compressor 52 that compresses the enclosed refrigerant and sends high-temperature and high-pressure refrigerant to the refrigeration cycle, a condenser 91 that dissipates the refrigerant and condenses and liquefies it to medium temperature and high pressure, and a liquefied refrigerant. A decompression device 110 that decompresses, an evaporator 83 that evaporates the refrigerant to generate cold, and the like are connected to each other by a refrigerant pipe 94.

  Here, the compressor 52 is placed in a concave portion 50 in which the back side is recessed in a stepped shape that is one step lower on the top surface portion of the heat insulating box 31. The recess 50 is surrounded by left and right walls formed by the outer box 33, and is configured to open above and behind the heat insulating box 31, and the opening is covered with a cover 95. Further, a flow in which a heat dissipating fan 96 for circulating air in the space of the recess 50 is placed side by side with a predetermined distance from the compressor 52 and air is applied to the compressor 52. It is arranged so as to circulate and promote heat dissipation.

  The condenser 91 is arranged in front of the bottom of the heat insulating box 31 and an evaporating dish 86 for storing defrosted water is arranged in the rear. Both the condenser 91 and the evaporating dish 86 are small in size and highly efficient in order to improve the internal volume of the refrigerator main body 30. A typical condenser 91 is a spall fin tube system, which is fixed to the bottom surface of the heat insulating box 31 together with the condenser duct 99 and radiates heat from the condenser 91 or evaporates water stored in the evaporating dish 86. A fan 98 is installed to promote the above. Further, the condenser 91 may constitute an immersion pipe 97 as a heat source for raising the temperature of water in the evaporating dish 86 by partially passing through the inside of the evaporating dish 86 in addition to the heat dissipation of the refrigerant. it can.

  As described above, the evaporator 83 is arranged so as to straddle the rear of the lowermost freezer compartment 44 and the vegetable compartment 43 above it, and a typical one is a fin and tube type, which is more than the compressor 52. It will be placed in a low position. Further, the condenser 91 may not be required as long as sufficient heat dissipation in the refrigerant pipe 94 can be ensured. In this case, the volumetric efficiency of the refrigerator can be further increased.

  Next, the refrigerant pipe 94 for connecting the compressor 52, the condenser 91, the evaporator 83, and the like described above will be described.

  As the refrigerant pipe 94, a copper pipe that is easy to process and inexpensive is often used as a typical one, and an iron pipe, an aluminum pipe, or the like may be used as other means.

  As shown in FIG. 4, the refrigerant pipe 94 is disposed on the back surface and the front surface of the heat insulating box 31, and includes a first refrigerant pipe 94 a, a second refrigerant pipe 94 b, and a third refrigerant pipe 94 c. First, the first refrigerant pipe 94a located on the left side of the back is for sending the refrigerant discharged from the compressor 52 of the recess 50 to the condenser 91, and passes through the side surface from the top surface of the heat insulating box 31 and condenses. This is a pipe for connecting the vessel 91. Further, the heat insulating box 31 is positioned between the outer box 33 and the inner box 32 so as to be in contact with the outer box 33, and a part thereof is a member having good thermal conductivity, such as the heat radiation promoting means 100 such as aluminum tape. It is being fixed so that it may affix on the outer box 33. After that, it is configured to be in contact with the outer box 33 by filling with a foam heat insulating material 34.

  Next, the second refrigerant pipe 94b located on the front surface is a pipe for further dissipating the refrigerant radiated by the condenser 91. The second refrigerant pipe 94b is formed by bending the front end of the side surface at the front opening of the heat insulating box 31 and forming the side surface. Along the communicating edge portion 101, it is laid over substantially the entire circumference of the edge portion 101, and is positioned on the inner box 32 side of the edge portion 101 so as to be in contact with the front opening side. There is also a method of directly injecting and fixing a resin having good thermal conductivity in order to make it closely contact with the edge portion 101. The second refrigerant pipe 94b is also configured on the front surface of a plurality of partition walls that divide the heat insulating box 31 into a plurality of storage chambers having different temperature zones, and in this case, is disposed on the right side of the edge portion 101 described above. The second refrigerant pipe 94b is bent at the height of the partition wall and is bent on the partition wall side so as to pass through almost the entire width in front of the partition wall. It arrange | positions so that it may reciprocate up and down in front of a wall, and it may arrange | position so that it may return to the right side of the edge part 101. FIG. As described above, the other partition walls are configured in the same manner as described above, so that the second refrigerant pipe 94b in which the edge portion 101 and the partition wall are disposed is configured so that the front opening of the heat insulating box 31 is arranged with a single stroke. become.

  On the other hand, the third refrigerant pipe 94c located on the right side of the back surface passes the refrigerant condensed and liquefied by the condenser 91 and the second refrigerant pipe 94b from the right side surface of the heat insulating box 31 to the top surface side of the recess 50 again. It is for returning, and is configured to be affixed to the inner surface of the outer box 33 by means of heat radiation promotion means 100 such as aluminum tape, like the first refrigerant pipe 94a described above. Here, it is desirable to attach the first refrigerant pipe 94a and the third refrigerant pipe 94c to the rear side of the outer box 33 as much as possible. This is because the heat insulating wall on the side surface of the normal heat insulating box 31 has a draft angle such as a jig, and the wall thickness on the rear side is increased, so that heat penetration into the storage chamber is reduced.

  The decompression device 110 is for depressurizing and sending the high-pressure refrigerant that has been condensed and liquefied by heat dissipation to the evaporator 83, and between the back plate 35 of the heat insulation box 31 and the back of the inner box 32. Also, it is arranged and configured so as to be covered with the foam heat insulating material 34 so as not to come into contact. The decompression device 110 generally uses a small tube diameter, and a refrigerator often uses about 0.5 mm to 1 mm (tube inner diameter). In addition, the pressure may be reduced using a refrigerant flow rate control valve or an expansion valve that can freely control the flow rate of the refrigerant. Further, before reaching the decompression device 110, a dryer provided with a filter (not shown) for preventing dust and metal powder in the refrigerant pipe 94 from returning to the compressor 52, a suction member (not shown) for adsorbing moisture in the system, and the like. 111 is provided in the refrigeration system and is arranged around the heat radiating fan 96 which is housed in the recess 50 and is on the windward side of the compressor 52.

  The suction pipe 112 is for returning the refrigerant vaporized by the evaporator 83 to the compressor 52, and is arranged between the back plate 35 of the heat insulating box 31 and the back of the inner box 32, It is configured to be covered with the foam heat insulating material 34 so as not to contact either the back surface of the inner box 32.

  Further, the discharge pipe 113 connects the compressor 52 and the first refrigerant pipe 94a in the recess 50, and the discharge pipe 113 is usually arranged with the shortest distance in a straight line. In order to reduce the high-temperature and high-pressure refrigerant compressed in step 1 to a predetermined temperature without directly entering the first refrigerant pipe 94a, a temperature reduction means 114 is provided which takes a predetermined length by, for example, spirally winding. At the same time, it is arranged on the windward side of the compressor 52.

  About the refrigerator comprised as mentioned above, the effect | action is demonstrated below.

  First, the compressor 52 is placed in the concave portion 50 at the rear of the top surface of the heat insulating box 31 and is not disposed in the rear region of the freezing chamber 44 which is the lowermost storage chamber. Arranged on the back of the upper vegetable compartment 43, the evaporator 83 and the cooling fan 84 are provided approximately within the height range of the freezer compartment 44 and the vegetable compartment 43, and the evaporator 83 is extended in the height direction to reduce the depth dimension. Thus, the thickness of the cooling chamber 80 can be reduced to reduce the ineffective space that does not contribute to the internal volume, and the storage capacity of the vegetable room 43 and the freezing room 44 can be increased to improve the storage capacity. 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 43 and the freezing compartment 44 are drawer-type storage compartments, food stored in the back of the vegetable compartment container 75 and the freezing compartment container 76 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 is formed as small as possible and the protrusion of the uppermost refrigerating chamber 40 to the inner side is not minimized, the inside of the refrigerating chamber 40 is visually compressed. The feeling of feeling and obstruction will be felt.

  Therefore, it is necessary to arrange the condenser 91 of the refrigeration cycle on the bottom surface of the refrigerator main body 30 and arrange only the heat dissipating fan for cooling the compressor 52 in the recess 50 to promote heat dissipation. The volume and the exhaust heat air passage can be formed small, and the protruding margin into the refrigerator compartment 40 can be suppressed.

  In particular, in recent years, from the viewpoint of the user's usage frequency, ease of freshness management, ergonomic ease of use, etc., the refrigerator compartment 40 with the highest frequency of use is placed in the upper position where it can be opened and removed in front of the user. The vegetable room 43, where you can put in and out things and want to maintain freshness on a daily basis, is easy to use, and there is a freezer room 44 that has stock items that you don't put in and out for a long time, and you need to consider dropping during handling. However, it is a disadvantage that the storage capacity of the lowermost freezer compartment 44 cannot be secured with the layout of the machine room including the compressor 52 in this layout. According to the present embodiment, the depth of the lowermost freezer compartment 44 can be expanded in the same manner as the vegetable compartment 43, and the indoor space shape does not become complicated and is a large storage item. Convenient enough to handle the increase in the frequency of use of frozen foods due to the increase in the number of flow foods for short-term frozen storage such as lunch boxes and prepared foods in addition to stock foods for long-term frozen storage, as well as rational storage and enhanced storage. A highly functional refrigerator can be provided.

  The effects relating to the storage capacity and storage performance can be enjoyed even if the freezer compartment 44 and the vegetable compartment 43 are not drawer-type storage rooms, but the utility is even greater if they are drawer-type storage rooms. That is, by making the drawer rail lengths substantially the same, it becomes possible to match the drawer allowance of the freezer compartment 76 and the drawer allowance of the vegetable compartment container 75 almost equally, and the user can adjust the drawers of both rooms daily. There is no sense of incongruity when the storage container is pulled out and the pulling out is different, and the shape of the pulled out storage container can be aligned in a simple shape that is almost a rectangular parallelepiped. There is a feeling and it becomes high as the product quality of the refrigerator.

  Next, regarding the operation of the refrigeration cycle, the refrigeration cycle is operated by a signal from a control board (not shown) according to the temperature set in the warehouse, and the cooling operation is performed. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 52 radiates heat in the condenser 91 and the second refrigerant pipe 94b via the discharge pipe 113 and the first refrigerant pipe 94a disposed in the concave portion 50, and has a medium temperature. The liquid is condensed and liquefied into a high-pressure refrigerant, and is decompressed by the decompression device 92 via the third refrigerant pipe 94 c to reach the evaporator 83 as a low-temperature and low-pressure liquid refrigerant. The condenser 91 can be eliminated if a sufficient amount of heat is dissipated in the refrigerant pipe 94.

  By the operation of the cooling fan 84, heat is exchanged with the air in each storage chamber, the refrigerant in the evaporator 83 evaporates, and supply of low-temperature cold air is controlled by a damper device (not shown) to set each storage chamber. Cooling is performed so that the predetermined temperature can be maintained. The refrigerant exiting the evaporator 83 is sucked into the compressor 52 through the suction pipe 112.

  Here, the compressor 52 is disposed in the upper concave portion 50, the condenser 91 is disposed on the bottom surface, and a heat dissipating fan 96 and a fan 98 for dissipating the heat are provided to cool the conventional main condenser. From the serial arrangement in which the compressor is cooled with air, the air passage for radiating heat from the compressor 52 and the condenser 91 is divided into upper and lower parts, arranged in parallel, and the air passage configuration is simplified to reduce the size of the air passage. In addition, since the heat dissipation capability can be improved, the condenser 91 can be downsized and the ineffective space of the refrigerator main body 30 can be reduced.

  The compressor 52 of the present embodiment is formed by making the concave portion 50 as small as possible, thereby suppressing forward and downward protrusion to the refrigerator compartment 40 and suppressing the height to be substantially the same as that of the uppermost shelf 70. The storage capacity can be improved without any problem in actual use without reducing the storage capacity at a reachable position, and the recess 50 is elongated in the width direction, and the heat radiating fan 96 is formed in the width direction. By configuring so that the wind flows, it is possible to form a single square cylindrical duct, and it is possible to configure an efficient and rational air path for the heat dissipation of the compressor 52.

  Next, with respect to the vicinity of the bottom surface of the condenser 91 and the heat insulation box 31, heat is dissipated by disposing the condenser 91 on the bottom surface of the heat insulation box 31, which can be said to be an invalid space for the storage room, and exchanging heat with the outside air by the fan 98. Ability can be improved. Further, by providing a dip pipe 97 through which a part of the condenser 91 is brought into contact with the water stored in the evaporating dish 86, as a heat source for raising the temperature of the water, and as a part of the condenser 91 The effect of can be obtained at the same time.

  Furthermore, by disposing the condenser 91 on the windward side and the evaporating dish 86 on the leeward side, the windward side condenser 91 always takes in outside air when the fan is operating and promotes heat dissipation, and the heat is dissipated. By allowing the dry air having a slightly high temperature to pass through the surface of the evaporating dish 86 on the leeward side, the evaporating ability can be drastically improved by a synergistic effect with increasing the water temperature by the immersion pipe 97 described above.

  Next, regarding the refrigerant pipe 94 of the present embodiment, the refrigerant pipe 94 is disposed between the outer box 33 and the inner box 32 of the heat insulating box 31 to insulate the outside of the storage box of the heat insulating box 31 originally. Since the compressor 52, the condenser 91, and the evaporator 83 can be connected to each other by using an invalid space with respect to the storage volume of the storage chamber, which is the location of the foam heat insulating material 34, the storage volume in the warehouse It is possible to configure the pipe without reducing the flow.

  In addition, since the first refrigerant pipe 94a is attached to the outer box 33 via the heat radiation promoting means 100 such as aluminum tape, the high-temperature and high-pressure refrigerant passing therethrough is efficiently conducted to the outer box 33. Since the foam heat insulating material 34 is filled, it is difficult to conduct heat, the heat conduction to the outer box 33 is further promoted, and an efficient and rational heat dissipating means can be configured. Moreover, since the 2nd refrigerant | coolant piping 94b is attached ahead of the storage chamber side of the edge 101 of a front opening, the effect | action similar to the above-mentioned 1st refrigerant | coolant piping 94a can be acquired. On the other hand, the front surface of the edge portion 101 and the partition wall 45 tends to be cooled by the heat conduction of the cold air from the storage chamber side, but the second refrigerant pipe 94b is arranged and configured on the front surface of the edge portion 101 and the partition wall 45. As a result, the surface temperature can be kept high, so that condensation and frosting can be prevented. It should be noted that by using a heat source such as a heater in places such as the partition wall 45b where it is difficult to bend or arrange the piping, the effect of preventing condensation can be configured without much change.

  Further, the first refrigerant pipe 94 a and the third refrigerant pipe 94 c that enter and exit from the recess 50 are only on the top surface side of the heat insulation box 31, so that the components constituting the recess 50 are forward from the rear of the heat insulation box 31. At the time of fitting, the refrigerant pipe 94 can be installed without being damaged or broken, and the fitting operation can be performed efficiently and simply. Further, it is possible to connect the refrigerant pipe 94 and to improve the efficiency of the welding work by arranging the welding location when connecting the compressor 52, the discharge pipe 113, the dryer 111, and the like.

  Further, in the present embodiment, the temperature reducing means 114 in which the piping of the discharge pipe 113 is spirally provided and provided on the suction side of the heat radiating fan 96, so that the outside air is always taken while the heat radiating fan 96 is operating. In addition, since the surface area of the pipe is remarkably increased in a small space, the high-temperature and high-pressure refrigerant discharged from the compressor 52 is brought to a predetermined temperature before entering the first refrigerant pipe 94a in the heat insulating box 31. Can be lowered. As a result, even when the user touches the top surface of the heat insulation box 31, there is no sense of discomfort with high temperatures such as burns, and even when the bag is placed on the top surface, the temperature is low, so the discoloration and corrosion of the bag It can provide a refrigerator that can be used without worry. Moreover, since the surface temperature of the heat insulation box 31 falls similarly, the penetration | invasion of the heat | fever into each storage chamber can be suppressed, and it leads also to the reduction of power consumption. Further, by shifting the resonance point of the discharge pipe 113 from the rotational frequency of the compressor 52 by the spiral temperature reducing means 114, it is possible to prevent vibration propagation to the heat insulating box 31.

  Next, with regard to the decompression device 110 and the suction pipe 112, the decompression device 110 such as a capillary and the suction pipe 112 are usually configured such that the pipes are in contact with each other by close contact means such as solder, and the decompression device 110 having a relatively high temperature. The suction pipes 112 having a relatively low temperature exchange heat with each other. This is because the decompression device 110 can further lower the temperature to reliably liquefy the refrigerant and improve the refrigerating capacity, and the suction pipe 112 can be reliably vaporized by increasing the temperature, and the suction pressure of the compressor 52 An efficient refrigeration cycle can be configured by increasing the amount of refrigerant circulation by increasing the amount of refrigerant. Further, since it is housed in the back wall of the heat insulation box 31 and is covered and insulated by the foam heat insulating material 34, the low temperature refrigerant vaporized by the evaporator 83 is brought into contact with the suction pipe 112 passing through the pipe. There is no worry about condensation.

  For this reason as well, it is better to dispose the dryer 111 on the inlet side of the decompression device 110 in the upper recess 50. If the dryer 111 is disposed below, the decompression device 110 and the suction pipe 112 are difficult to exchange heat. Because it ends up. Further, the dryer 111 is placed on the windward side of the compressor 52 in the recess 50, so that the radiated high-pressure refrigerant can always be brought into contact with the outside air. If the dryer 111 is positioned on the leeward side of the compressor 52, the heat is radiated. While the liquefied refrigerant is heated again and vaporizes, there is a possibility that the refrigeration cycle may be malfunctioned. However, the liquefied refrigerant can be supplied to the evaporator 83 without any problem.

  As described above, the compressor 52 does not exist behind the freezer compartment 44 and is arranged behind the top surface of the heat insulating box 31, so that the storage capacity of the storage compartment does not necessarily increase and the storage performance is not improved. Depending on the arrangement of the condenser 91, the evaporator 83, and the refrigerant pipe 94, the storage capacity in each storage chamber may be greatly reduced. In the present embodiment, as described above, the condenser 91 and the evaporating dish 86 are formed low on the bottom surface, the evaporator 83 is provided on the back surface of the freezer compartment 44 and the vegetable compartment 43, and the refrigerant pipe 94 is provided on the inner box of the heat insulating box 31. Since the suction pipe 112 and the decompression device 110 are installed on the back wall of the heat insulation box 31 between the outer casing 33 and the outer box 33, all the refrigeration cycle parts are arranged in a place that can be said to be an invalid space for storage. It can be said that the storage capacity was increased and the storage performance was improved.

(Embodiment 2)
FIG. 10 is a position configuration diagram of the high-pressure pipe of the refrigerator in the second embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 10, the refrigerant pipe 94 connecting the compressor 52, the condenser 91, and the evaporator 83 constituting the refrigeration cycle is disposed between the outer box 33 and the inner box 32 constituting the heat insulating box 31, Only the back surface and the front surface of the heat insulation box 31 are used to dissipate and condense the refrigerant, connect the first refrigerant pipe 94a and the second refrigerant pipe 94b, and further connect the second refrigerant pipe 94b and the third refrigerant pipe 94c. Configured to connect.

  In the configuration as described above, a welded portion of the first refrigerant pipe 94a, the condenser 91, the second refrigerant pipe 94b, and the third refrigerant pipe 94c is provided in the lower part of the refrigerator body. Thereby, since a welding part can be concentrated on the lower part, the welding at the time of refrigerator assembly can be performed easily. In addition, serviceability can be improved when the condenser needs to be replaced in the market for some reason.

(Embodiment 3)
FIG. 11 is a position configuration diagram of the high-pressure pipe of the refrigerator in the third embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 11, the refrigerant pipe 94 that connects the compressor 52, the condenser 91, and the evaporator 83 that constitute the refrigeration cycle is disposed between the outer box 33 and the inner box 32 that constitute the heat insulating box 31, Only the back surface and the front surface of the heat insulation box 31 are used to dissipate and condense the refrigerant, connect the first refrigerant pipe 94a and the second refrigerant pipe 94b, and further connect the second refrigerant pipe 94b and the third refrigerant pipe 94c. Configured to connect.

  In the above configuration, a welded portion of the first refrigerant pipe 94a, the condenser 91, the second refrigerant pipe 94b, and the third refrigerant pipe 94c is provided in the upper part of the refrigerator main body. Thereby, since the welding part including a compressor can be concentrated on upper part, the welding at the time of refrigerator assembly can be performed easily.

(Embodiment 4)
FIG. 12 is a position configuration diagram of the high-pressure pipe of the refrigerator in the fourth embodiment of the present invention. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIG. 12, the first refrigerant pipe 94 a and the third refrigerant pipe 94 c constituting the refrigeration cycle are fixed to the back surface of the outer box 33 using a heat radiation promoting means such as aluminum tape.

  In the configuration as described above, not only the efficiency of the refrigeration cycle is improved by improving the heat dissipation efficiency, but also by forming it integrally with the back plate, it ensures a constant amount of heat dissipation even when the heat insulating material of the refrigerator main body is foamed. be able to.

  As described above, the refrigerator according to the present invention reduces the ineffective space as much as possible by storing functional parts such as a compressor in the top surface recess of the heat insulation box that is out of reach, and stores the lowermost stage. In addition to increasing the storage capacity of the room and improving the storage capacity of the entire refrigerator, the function of the refrigeration cycle, such as heat dissipation, condensation, and evaporation, can be achieved by arranging the functional components in the refrigerator where the compressor is located above and the configuration of the piping connecting them. Since it can be performed efficiently and rationally, it can be applied to other cooling devices having the same layout.

Front view of the refrigerator in Embodiment 1 of the present invention AA sectional view of FIG. Refrigerant piping configuration diagram of the refrigerator in the same embodiment Positional configuration diagram of high-pressure piping of the refrigerator in the same embodiment Concave front view of heat insulation box in the same embodiment Top view of the recessed portion of the heat insulation box in the same embodiment Bottom exploded configuration diagram of heat insulation box in the same embodiment Rear view of the heat insulation box in the same embodiment Concave part block diagram of heat insulation box in the same embodiment Positional configuration diagram of high-pressure piping in Embodiment 2 of the present invention Positional configuration diagram of high-pressure piping in Embodiment 3 of the present invention Positional configuration diagram of high-pressure piping in Embodiment 4 of the present invention Vertical sectional view of a refrigerator in the prior art Perspective view of a refrigerator in the prior art Refrigeration cycle diagram of refrigerator in the prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 31 Heat insulation box 32 Inner box 33 Outer box 34 Foam heat insulating material 35 Back plate 50 Recessed part 52 Compressor 83 Evaporator 85 Defroster 86 Evaporating dish 91 Condenser 94 Refrigerant pipe 94a First refrigerant pipe 94b Second refrigerant pipe 94c First Three refrigerant pipes 110 Pressure reducing device 112 Suction pipe 113 Discharge pipe 120 Pipe welded part 121 Heat radiation promotion device

Claims (6)

  A heat insulating box, a recessed portion formed one step lower than the top surface behind the top surface of the heat insulating box, a compressor, a condenser and an evaporator provided in the heat insulating box, and pipes connecting the respective In a refrigerator having a refrigeration cycle in which a series of refrigerant channels are formed in order, the compressor is housed in the recess, and the piping is disposed at least on the front surface and the back surface of the heat insulating box. refrigerator.   A heat insulating box, a recessed portion formed one step lower than the top surface behind the top surface of the heat insulating box, a compressor, a condenser and an evaporator provided in the heat insulating box, and pipes connecting the respective In a refrigerator having a refrigeration cycle in which a series of refrigerant flow paths are formed in order, the compressor is housed in the recess, and the pipes are disposed at least on the front surface and the rear surface of the heat insulation box, A refrigerator characterized by passing from the back to the front and further through the back.   A heat insulating box, a recess configured one step lower than the top surface behind the top surface of the heat insulating box, a compressor and an evaporator provided in the heat insulating box, and a condenser at a lower portion of the heat insulating box, In a refrigerator having a refrigeration cycle in which a series of refrigerant flow paths are formed by sequentially providing pipes that connect the pipes, the compressor is housed in the recess, and the pipes are disposed at least on the front surface and the back surface of the heat insulating box. The refrigerator is characterized in that the route through which the refrigerant flows passes through the condenser from the back, then passes through the front, and further passes through the back.   The refrigerator according to any one of claims 1 to 3, wherein a welded portion of each pipe is configured near a lower portion of the heat insulating box.   The refrigerator according to any one of claims 1 to 3, wherein a welded portion of each pipe is configured near an upper portion of the heat insulating box.   The refrigerator installed according to any one of claims 1 to 3, wherein the pipe installed on the back surface is integrally formed with a back plate constituting the outer box by using a heat radiation accelerating means.

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