JP2007064590A - refrigerator - Google Patents

Abstract

An object of the present invention is to mount a compressor on the upper side, increase the storage capacity of the lowermost storage chamber and improve the storage capacity, and configure an efficient and rational refrigeration cycle.
A recessed portion 50 formed one step lower than the top surface behind the top surface of the heat insulating box body 31, and a compressor 52, a condenser 91, and an evaporator 83 provided in the heat insulating box body are connected to each other. In a refrigerator including a refrigeration cycle in which a series of refrigerant flow paths are formed by piping, the compressor 52 is housed in the recess 50, and the condenser 91 is disposed at least near the recess and the bottom surface of the heat insulation box. Yes, increase the storage capacity of the lowermost storage room, improve the storage capacity, promote the heat dissipation of the compressor located on the top surface that is relatively easy to open, and form a refrigeration cycle that can improve the heat dissipation of the condenser Can do.
[Selection] Figure 4

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. 10 and 11, the refrigerator main body 1 is composed of an outer box 2, an inner box 3, a foam heat insulating material 4 filled between the two, and a machine room 8 is provided 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 radiating pipe 11 that also serves as a condenser and a capillary tube 12 is connected between the side and the inlet of the cooler 6, and the outlet of the cooler 6 and the suction of the compressor 9 are connected. A low-pressure side pipe constituted by connecting a suction pipe 13 provided with a capillary tube 12 in series is connected to the side. 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. 12 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. In addition, the compressor installed behind the bottom face has a problem that when there is almost no gap with the back wall that is normally installed, the heat exhausted by the compressor cannot be performed well, and the heat is easily trapped. It was. In addition, since a heat dissipating pipe as a condenser is arranged on the back side of the refrigerator main body, it is generally installed on the wall on the back side without any gap when installing a refrigerator, so heat dissipation is hindered. Then, there was a problem that heat entered the inside of the warehouse.

  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 cannot be reached even when stretched back, and places a condenser and a compressor. Of the compressor located on the top surface that is relatively easy to open, increasing the storage capacity of the lowermost storage room, increasing the storage capacity, and in the recessed space behind the top surface and the bottom space of the refrigerator body An object of the present invention is to provide a refrigerator in which a refrigeration cycle capable of efficiently radiating heat and efficiently radiating heat from a condenser is formed.

  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 condenser is disposed at least near the recess and the bottom surface of the heat insulation box. It is.

  The refrigerator of the present invention increases the storage capacity of the lowermost storage chamber, improves the storage capacity, promotes heat dissipation of the compressor located on the top surface that is relatively easy to open, and efficiently arranges the condenser. It is possible to form a refrigeration cycle that can efficiently dissipate heat from the refrigerant pipe.

  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 flow paths are formed by pipes connecting them, and the compressor is housed in the recess, and the condenser is at least in the recess and in the heat insulation box. A compressor is placed behind the top of the uppermost storage room, which is an invalid space that cannot be reached even if it is stretched back, and is placed in the bottom space. Placed in the space and the bottom space of the refrigerator body, increasing the storage capacity of the lowermost storage room, improving the storage capacity, and promoting the heat dissipation of the compressor and condenser located on the top surface that is relatively easy to open , A refrigeration cycle that can heat the condenser well It can be formed. Further, by dividing the condenser into upper and lower parts, the components of the storage space in which the condenser is arranged are reduced and the air path is simplified, so that it is possible to promote the heat radiation capacity by increasing the air volume.

  In addition, the storage space of the recess can be made compact by dispersing the condenser, and the bottom space can be effectively utilized as the storage space of the condenser, resulting in an increase in the storage volume of the storage chamber, In particular, it is possible to simplify the shape of the lowermost storage chamber and improve the storage performance.

  The invention according to claim 2 is the invention according to claim 1, wherein a fan for cooling the compressor is disposed in the recess, and the condenser disposed in the recess is disposed on the windward side of the compressor. Therefore, it is possible to promote the heat radiation of the condenser disposed in the recess at the same time with a fan for cooling the compressor. In addition, by placing the condenser arranged in the concave portion on the windward side of the compressor, the condenser arranged in the concave portion can perform heat exchange with fresher outside air and further efficiently dissipate heat. Can be done.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the condenser arranged in the concave portion is composed only of piping, the compressor, and an outer box that constitutes the heat insulation box. It connects pipes configured between inner boxes, can be used as pipes connecting piping configured between the outer box and inner box constituting the compressor and the heat insulation box, and the compressor Since the high-temperature refrigerant discharged from the heat can be dissipated before reaching the piping formed between the outer box and the inner box constituting the heat insulation box, the temperature rise of the outer box surface constituting the heat insulation box It is possible to suppress heat intrusion from the inner box.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the condenser disposed near the bottom surface is substantially flat and radiates heat by the fan. Since the storage space of the condenser disposed in the space can be made compact, the storage capacity of the storage chamber is increased. Further, heat dissipation of the condenser disposed near the bottom surface is promoted, and more efficient heat dissipation can be performed.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the pipe extends at least until the refrigerant discharged from the compressor reaches the condenser disposed in the recess. The first refrigerant pipe to be connected, and the second refrigerant pipe to connect the condenser arranged in the recess and the condenser arranged in the vicinity of the bottom surface, the high-temperature refrigerant discharged from the compressor Precooling can be performed with a condenser disposed in the recess through the first refrigerant pipe. In addition, the refrigerant discharged from the condenser disposed in the concave portion can be radiated by the condenser disposed near the bottom surface through the second refrigerant pipe, so that more efficient heat radiation can be performed.

  The invention according to claim 6 is the invention according to claim 5, wherein the second refrigerant pipe connecting the condenser arranged in the recess and the condenser arranged in the vicinity of the bottom surface of the heat insulating box is provided. It is arranged on the side or back, and can be used as a pipe connecting the condenser arranged in the recess and the condenser arranged near the bottom, and promotes heat dissipation by conducting heat to the outer box Can do.

  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 line AA of FIG. 1, and FIG. 3 is a refrigerant piping configuration diagram of the refrigerator according to the same embodiment. 4 is a position configuration diagram of the high-pressure piping of the refrigerator in the embodiment, FIG. 5 is a configuration diagram of the refrigerant piping of the refrigerator in the embodiment, and FIG. 6 is an insulation box body of the refrigerator in the embodiment. FIG. 7 is a front view of the recessed portion of the heat insulating box body of the refrigerator in the same embodiment, FIG. 8 is a rear view of the heat insulating box body of the refrigerator in the same embodiment, and FIG. The recessed part block diagram of the heat insulation box of the refrigerator in embodiment 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. in order 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.

  In the cooling chamber 80, an evaporator 83 for exchanging heat in the air to convert it into cold air, and a cooling fan 84 for sending the cold air to each storage chamber are located above.

  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 configured by a condenser 91 a disposed side by side with the compressor 52 in the recess 50 and a condenser 91 b disposed in the space of the bottom surface of the heat insulating box 31. The upper condenser 91 a disposed in the recess 50 is constituted by a pipe, and heat radiation is promoted by the heat radiation fan 96 in the same manner as the compressor 52, and is disposed on the windward side of the compressor 52. The lower condenser 91b employs a small and highly efficient one that suppresses the height in order to improve the internal volume of the refrigerator body 30. Further, the lower condenser 91b is typically a spiral fin tube system, which is fixed to the bottom surface of the heat insulating box 31 together with the condenser duct 99, and has a fan 98 for promoting the heat radiation of the lower condenser 91b. It is installed.

  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.

  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 side 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, a third refrigerant pipe 94 c, and a fourth refrigerant pipe 94 d. It is configured. First, the first refrigerant pipe 94a located in the recess 50 is for sending the refrigerant discharged from the compressor 52 in the recess 50 to the upper condenser 91a disposed in the recess 50, and the discharge pipe of the compressor 52 and This is a pipe for connecting the upper condenser 91a.

  Next, the second refrigerant pipe 94b located on the left side is for sending the refrigerant discharged from the upper condenser 91a arranged in the recess 50 to the lower condenser 91b arranged in the vicinity of the bottom surface of the heat insulating box 31. Yes, it is a pipe that connects the lower condenser 91b that passes through the side surface from the top surface of the heat insulation box 31 and is disposed in the bottom space of the heat insulation box 31. Moreover, it is located between the outer box 33 and the inner box 32 of the heat insulation box 31, and is disposed so as to contact the outer box 33, and a part of the heat dissipation is good like the heat dissipation promoting member 100 such as an aluminum tape. The member is fixed so as to be attached to 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 third refrigerant pipe 94c located on the front surface is a pipe for further radiating the refrigerant radiated by the lower condenser 91b. The third refrigerant pipe 94c 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 edge portion 101 communicating with the edge portion 101, the edge portion 101 is laid over substantially the entire circumference, 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 third refrigerant pipe 94c 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 101 described above. The third refrigerant pipe 94c is bent at the height of the partition wall and is bent on the partition wall side so as to pass almost the entire width in front of the partition wall, and a U-bend portion is provided near the front side on the left side of the edge 101. 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 edge portion 101 and the third refrigerant pipe 94c that arranges the partition walls are configured so that the front opening of the heat insulating box 31 is arranged with a single stroke. become.

  On the other hand, the fourth refrigerant pipe 94d located on the right side passes the refrigerant condensed and liquefied by the lower condenser 91b and the third refrigerant pipe 94c from the right side of the heat insulating box 31 to the top side of the recess 50. It is for returning again, and is configured to be affixed to the inner surface of the outer box 33 by a heat radiation promoting member 100 such as an aluminum tape, like the second refrigerant pipe 94b described above. Here, it is desirable to attach the second refrigerant pipe 94b and the fourth refrigerant pipe 94d 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.

  As shown in FIG. 5, the refrigerant pipe 94 as described above is usually a second refrigerant pipe 94 b and a fourth refrigerant pipe located on the side surface of a metal material such as a pre-coated steel plate forming the outer box 33 in a flat plate state. 94d is installed at a predetermined position, and a heat radiation promoting member 100 such as an aluminum tape is pasted and fixed at a necessary position. Thereafter, the outer box 33 is fixed together with the second refrigerant pipe 94b and the fourth refrigerant pipe 94d. A method is adopted in which the top and side surfaces of the outer box 33 are formed by folding along a folding line. In addition, there is also a method in which the third refrigerant pipe 94c located on the front surface is bent and configured in the same manner as described above.

  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.

  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 that is the lowermost storage chamber. The evaporator 83 and the cooling fan 84 are disposed 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 shorten the depth dimension. By doing so, the thickness of the cooling chamber 80 can be reduced to reduce the ineffective space that does not contribute as the internal volume, the storage capacity of the vegetable room 43 and the freezing room 44 can be increased, and the storage performance can be improved. Moreover, since the recessed part 50 of the back | upper surface of the heat insulation box 31 was difficult for the user to reach, so to speak, it was a space close to an invalid space, so positioning the compressor 52 at that location would greatly increase the internal volume of the refrigerator body 30. It can be used well. Furthermore, since the vegetable compartment 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, the lower condenser 91b is disposed on the bottom surface of the refrigerator body 30, and the upper condenser 91a composed of piping, and only the heat dissipating fan for cooling the compressor 52 and the upper condenser 91a are disposed in the recess 50. While accelerating heat dissipation, the volume of the recess 50 and the exhaust heat air passage can be formed small, and the protrusion 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 passes through the first refrigerant pipe 94a arranged in the concave portion 50, and near the upper condenser 91a and the second refrigerant pipe 94b arranged in the concave portion 50 and the bottom surface. Heat is dissipated in the lower condenser 91b and the third refrigerant pipe 94c disposed to be condensed and liquefied into a medium-temperature and high-pressure refrigerant, and is decompressed by the decompression device 92 via the fourth refrigerant pipe 94d to become a low-temperature and low-pressure liquid refrigerant. It reaches the evaporator 83.

  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) or the like. Cooling is performed so as to maintain the predetermined temperature set. The refrigerant exiting the evaporator 83 is sucked into the compressor 52 through the suction pipe 112.

  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.

  Further, in the present embodiment, the pipe of the upper condenser 91a disposed in the recess 50 is formed in a spiral shape and provided on the suction side of the heat dissipation fan 96, so that the outside air is always drawn while the heat dissipation fan 96 is in operation. 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 pre-cooled before entering the second refrigerant pipe 94b in the heat insulating box 31. Can do. As a result, even if the user touches the top or side 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, the temperature is low, A refrigerator that can be used with confidence without discoloration or corrosion can be provided. 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. Furthermore, since the pipe of the upper condenser 91a is formed in a spiral shape, vibration propagation to the heat insulating box 31 can be prevented by shifting the resonance point of the upper condenser 91a from the rotational frequency of the compressor 52. It becomes.

  Next, the lower condenser 91b disposed in the bottom space of the heat insulating box 31 is originally disposed in the bottom space of the heat insulating box 31 which can be said to be an invalid space for the storage room, so that a new installation space is provided. The heat radiation capability can be improved by exchanging heat with the outside air using the fan 98. Therefore, the arrangement of the lower condenser 91b does not bite into the freezer compartment 44 that is the lowermost storage room, and the freezer compartment 44 can be kept in a simple shape to improve the storage capacity.

  Next, regarding the second refrigerant pipe 94b, the third refrigerant pipe 94c, and the fourth refrigerant pipe 94d of the present embodiment, the second refrigerant pipe 94b, the third refrigerant pipe 94c, and the fourth refrigerant pipe 94d are insulated from the heat insulating box 31. It is a place of the foam heat insulating material 34 which originally insulates the outside of the storage chamber of the heat insulating box 31 by being arranged between the outer box 33 and the inner box 32 of the inner box 32. Since the compressor 52, the condenser 91, and the evaporator 83 can be connected to each other, piping can be configured without reducing the storage volume in the warehouse.

  In addition, since the second refrigerant pipe 94b is attached to the outer box 33 via the heat radiation promoting member 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 3rd refrigerant | coolant piping 94c is attached ahead of the storage chamber side of the edge 101 of a front opening, the effect | action similar to the above-mentioned 2nd refrigerant | coolant piping 94b 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 third refrigerant pipe 94c 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.

  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, only the upper condenser 91a composed of piping and the heat dissipating fan 96 that cools the compressor 52 and the upper condenser 91a are arranged in the recess 50 at the rear of the top surface, and the bottom surface. The lower condenser 91b arranged in the vicinity is formed low on the bottom surface, the evaporator 83 is provided on the back of the freezer compartment 44 and the vegetable compartment 43, and the second refrigerant pipe 94b, the third refrigerant pipe 94c, and the fourth refrigerant pipe 94d are insulated. Since the suction pipe 112 and the decompression device 110 are installed on the back wall of the heat insulation box 31 between the inner box 32 and the outer box 33 of the box 31, it can be said that all the refrigeration cycle parts are ineffective spaces for storage. It can be said that the storage capacity can be increased and the storage performance can be improved by arranging the storage spaces at the locations. In addition, the condenser 91 is divided into an upper condenser 91a configured by piping in the recess 50 and a lower condenser 91b disposed near the bottom surface, so that the heat dissipation of the condenser is increased while increasing the storage capacity. Can be formed efficiently.

  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 line 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 Refrigerant piping configuration diagram of the refrigerator in the same embodiment The recessed part front view of the heat insulation box of the refrigerator in the embodiment Concave top view of the heat insulation box of the refrigerator in the same embodiment Rear view of the heat insulation box of the refrigerator in the same embodiment Concave part block diagram of the heat insulation box of the refrigerator in the same embodiment Side sectional view of a conventional refrigerator Rear view of a conventional refrigerator Refrigeration cycle diagram of a conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 30 Refrigerator main body 31 Heat insulation box 32 Inner box 33 Outer box 34 Foam insulation material 35 Back plate 50 Concave part 52 Compressor 80 Cooling chamber 83 Evaporator 84 Cooling fan 91 Condenser 91a Upper condenser 91b Lower condenser 94 Refrigerant piping 94a First One refrigerant pipe 94b Second refrigerant pipe 94c Third refrigerant pipe 94d Fourth refrigerant pipe 96 Radiating fan 98 Fan 110 Pressure reducing device 112 Suction pipe

Claims (6)

  A series of pipes connecting the heat insulation box, a recess formed one step lower than the top of the heat insulation box, and a compressor, a condenser, and an evaporator provided in the heat insulation box. In the refrigerator having a refrigeration cycle having a refrigerant flow path, the compressor is housed in the recess, and the condenser is disposed at least in the recess and in the space of the bottom surface of the heat insulating box. A refrigerator characterized by that.   The refrigerator according to claim 1, wherein a fan for cooling the compressor is disposed in the recess, and the condenser disposed in the recess is disposed on the windward side of the compressor.   The condenser arranged in the concave portion is constituted by only a pipe, and connects the compressor and a pipe constituted between an outer box and an inner box constituting the heat insulation box. Or the refrigerator of 2.   4. The refrigerator according to claim 1, wherein the condenser disposed in the vicinity of the bottom surface has a substantially flat shape and is radiated by a fan. 5.   The pipe includes a first refrigerant pipe that connects at least a refrigerant discharged from the compressor to a condenser disposed in the recess, a condenser disposed in the recess, and a condenser disposed near the bottom surface. The refrigerator according to any one of claims 1 to 4, wherein the refrigerator is configured by a second refrigerant pipe that connects the two.   The second refrigerant pipe that connects the condenser disposed in the recess and the condenser disposed in the space of the bottom surface of the heat insulation box is disposed on a side surface or a back surface of the heat insulation box. The refrigerator according to claim 5.

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