JP2005172307A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To maximize the effect of reduction of heat absorbing quantity by a vacuum heat insulating material while sufficiently securing the heat radiating performance of a condenser, with respect to a refrigerator provided with the condenser and the vacuum heat insulating material in an urethane heat insulating material between an outer casing and an inner casing. <P>SOLUTION: This refrigerator comprises the outer casing 202 forming an outer wall, the inner casing 204 forming an inside inner wall, and a heat insulating casing 206 composed of the heat insulating material 204 foamed and packed between the outer casing 202 and the inner casing 203, and the vacuum heat insulating material 205 buried in the heat insulating material 204, the hollow plate-shaped condenser 220 defining an internal flow channel 221 is formed on a part or the whole of the outer casing 202, and the heat radiating performance can be improved as a heat insulating area of the condenser 220 is increased and a heat transfer passage to the outside air is shortened. Further as the vacuum heat insulating material 205 is installed inside of the condenser 220, the intrusion of the heat into the inside from the outside air and the condenser 220 can be inhibited. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a refrigerator composed of a heat insulating box formed by foaming and filling a heat insulating material between an outer box and an inner box.

  In recent years, as the demand for increasing the capacity of a refrigerator and reducing the installation space increases, a vacuum heat insulating material is provided in the refrigerator heat insulating wall to improve heat insulating performance (see, for example, Patent Document 1).

  Hereinafter, the conventional refrigerator will be described with reference to the drawings.

  FIG. 16 is a partially cutaway perspective view of a conventional refrigerator. FIG. 17: shows EE 'sectional drawing in FIG. 16 of a refrigerator. As shown in FIGS. 16 and 17, the conventional refrigerator 1 is foamed between the outer box 2 that forms the outer wall of the refrigerator 1, the inner box 3 that forms the inner wall of the refrigerator, and the outer box 2 and the inner box 3. A heat insulating box 6 comprising a filled urethane heat insulating material 4, a vacuum heat insulating material 5 disposed in the urethane heat insulating material 4, and a refrigerator cooling device (not shown) disposed in the urethane heat insulating material 4 of the heat insulating box 6. The heat insulating box 6 is composed of a condenser 20 and is divided into upper and lower parts by a first partition wall 6a and a second partition wall 6b, and a refrigerator compartment 6c, a freezer compartment 6d, and a vegetable compartment 6e are formed respectively.

  The vacuum heat insulating material 5 is composed of a jacket bag made of a film having a multilayer laminate structure that prevents gas permeation, and a core material made of fine powder such as silica and pearlite or inorganic fibers, and after the core material is sealed in the jacket The gas (air) in the jacket bag is evacuated, vacuumed and sealed with a heat seal. Since the heat conductivity of the vacuum heat insulating material 5 is 0.008 to 0.0025 W / m · K, and the heat insulating performance is very excellent, a heat insulating box is provided if it is mounted around the freezer compartment 6d where particularly low temperature is required. Even if the wall thickness of the body 6 is reduced, the amount of heat entering the interior can be effectively reduced. In general, the vacuum heat insulating material 5 is fixed to the inner surface side of the outer box 2 having a relatively larger number of flat surfaces than the inner box 3 having a larger curved surface.

  The condenser 20 disposed in the urethane heat insulating material 4 is generally constituted by a copper tube, and is attached to the inner surface side of the outer box 2 by an aluminum tape 28 or the like. For this reason, in order to condense the high-temperature and high-pressure gas conveyed from the compressor (not shown), it is necessary to ground the outer casing 2 and the condenser 20 to ensure a heat radiation area, and the condenser 20 that has become hot. It is necessary to isolate the condenser 20 (copper tube) from the refrigerator 1 as much as possible in order to reduce the amount of heat entering the interior from the refrigerator. Furthermore, in order to prevent the surface of the refrigerator 1 from being deposited, the heat of the condenser 20 must be effectively transferred to the outer box 2 so that the surface temperature of the outer box 2 does not decrease as much as the ambient temperature outside the refrigerator. Is mentioned.

  As described above, since both the vacuum heat insulating material 5 and the condenser 20 are arranged on the inner surface side of the outer box 2, the condenser 20 is arranged around the vacuum heat insulating material 5 so as not to disturb the mutual arrangement positions as shown in FIG. The structure is taken.

Further, as shown in FIG. 18, there is a structure in which a groove 30 is formed in a side surface portion on the outer box side of the vacuum heat insulating material 5 and a condenser 20 (copper pipe) is brought into contact with the groove 30. (For example, see Patent Document 2)
Further, as shown in FIG. 19, there is a method in which the vacuum heat insulating material 5 is arranged at a middle position between the outer box 2 and the inner box 3 using a fixing component 50. (For example, see Patent Document 3)
Japanese Patent Laid-Open No. 9-269177 Japanese Utility Model Publication No.61-21285 Japanese Patent Laid-Open No. 03-233285

  However, in order to save energy in the refrigerator, when the covering area of the vacuum heat insulating material 5 is increased in order to further reduce the amount of heat entering from the outside to the inside of the refrigerator, in the conventional method, the arrangement of the condenser 20 is the vacuum heat insulating material. Therefore, the length of the copper tube that is the condenser 20 is limited. Further, although the condenser 20 is bonded to the outer box 2 and the aluminum tape 28, the contact area is smaller than the line contact between the tube and the plate. The copper tube is fixed by temporarily fixing the copper tube with the aluminum tape 28 and then filling and fixing with urethane foam. However, the condenser 20 ( In some cases, the urethane heat insulating material 4 wraps around between the copper pipe) and the outer box 2 to reduce the contact area. Therefore, the heat radiation area required for condensing the refrigerant is also limited, the condensation temperature is not sufficiently lowered, and the condensation capacity is not increased. Therefore, the compression ratio is maintained high throughout the entire refrigeration cycle, the axial power of the compressor is high and the volumetric efficiency is low, and the COP of the refrigeration cycle is not improved.

  Further, as a conventional solution, as shown in FIG. 18, the vacuum heat insulating material 5 is thinned in order to reduce the material cost of the vacuum heat insulating material 5 or to improve the performance, or the cooling system (not shown) is increased. In order to increase the length of the copper tube that is the condenser 20 for the purpose of lowering the condensing temperature for efficiency, it is necessary to form many grooves 30 of the vacuum heat insulating material 5, but the inside of the vacuum heat insulating material 5 is in a vacuum state. For this reason, it is difficult to form a plurality of grooves 30 because there is a possibility that the grooves 30 are easily damaged by external stress. And, regarding the forming of the groove 30 in the vacuum heat insulating material 5, the cost for forming the groove by introducing a press machine is required. Furthermore, in the process of attaching the vacuum heat insulating material 5, the number of man-hours for aligning the groove 30 and the condenser (copper pipe) 20 is increased, and there is a problem that the production cost including the attachment efficiency increases.

  Further, as a conventional solution, there has been a method in which the vacuum heat insulating material 5 is arranged at an intermediate position between the outer box 2 and the inner box 3 using a fixing component 50 as shown in FIG. However, when the performance of the urethane heat insulating material 4 is improved and the wall thickness of the heat insulating box 6 is reduced, when the urethane heat insulating material 4 is foam-filled, the vacuum heat insulating material 5 and the fixing part 50 are made of the urethane heat insulating material 4. There was a problem that the flow was hindered and a urethane unfilled portion (void) was generated between the vacuum heat insulating material 5 and the outer box 2 or the inner box 3.

  The present invention overcomes the conventional technical problems, and can easily assemble and place a refrigerator without processing such as forming a groove in a vacuum heat insulating material, and increase the heat dissipation capacity of the condenser. It is another object of the present invention to provide a refrigerator having a structure capable of maximizing the effect of reducing the amount of heat absorbed by increasing the coverage of the vacuum heat insulating material on the refrigerator.

  In order to solve the above-mentioned problems, a refrigerator according to the present invention comprises a heat insulating box comprising an outer box that forms an outer wall, an inner box that forms a warehouse inner wall, and a heat insulating material that is foam-filled between the outer box and the inner box. The outer box is provided with a hollow plate-shaped condenser forming an internal flow path in a part or the whole of the outer box, and the heat dissipation area of the condenser is conventionally Compared to this, the heat transfer path to the outside air is shortened, so that the condensing action in the condenser is promoted, and the heat dissipation capability of the condenser can be improved.

  The refrigerator of the present invention includes an outer box that forms an outer wall, an inner box that forms an inner wall, a heat insulating material that is foam-filled between the outer box and the inner box, and a vacuum heat insulating material that is buried in the heat insulating material. A heat insulating box made of a material, and the outer box is formed by forming a hollow plate-shaped condenser forming an internal flow path in a part or the whole of the outer box, and the heat dissipation area of the condenser As compared with the prior art, the heat transfer path to the outside air is shortened, so that the condensing action is promoted and the heat dissipation capability can be improved. Moreover, since the vacuum heat insulating material is arrange | positioned inside the store | warehouse | chamber of a condenser, the penetration | invasion heat | fever from outside air and a condenser can be suppressed.

  According to the refrigerator of this invention, there exists an effect which can improve the thermal radiation capability of a condenser.

  Moreover, there exists an effect which can suppress the heat | fever amount of penetration | invasion from the condenser and atmospheric gas outside a store | warehouse | chamber inside.

  The invention of the refrigerator according to claim 1 comprises: an outer box that forms an outer wall; an inner box that forms an inner wall of a warehouse; and a heat insulating box body that includes a foam-filled heat insulating material between the outer box and the inner box. The outer box is provided with a condenser having a hollow plate shape forming an internal flow path in a part or the whole of the outer box, and the heat dissipation area of the condenser is smaller than that of the conventional case. Since the heat transfer path to the outside air is increased and the heat transfer path to the outside air is shortened, the condensing action in the condenser is promoted, and the heat dissipation ability of the condenser can be improved.

  The invention according to claim 2 includes an outer box that forms an outer wall, an inner box that forms an inner wall of a warehouse, a heat insulating material that is foam-filled between the outer box and the inner box, and a vacuum that is buried in the heat insulating material. A heat insulating box made of a heat insulating material, and the outer box is formed by forming a hollow plate-shaped condenser forming an internal flow path in a part or the whole of the outer box. Since the area is increased compared to the conventional case and the heat transfer path to the outside air is shortened, the condensing action is promoted and the heat radiation capability can be improved. Moreover, since the vacuum heat insulating material is arrange | positioned inside the store | warehouse | chamber of a condenser, the penetration | invasion heat | fever from outside air and a condenser can be suppressed.

  The invention according to claim 3 is the invention according to claim 2, wherein the condenser is provided together with a vacuum heat insulating material on a part or the whole of the refrigerator rear portion, and the condenser is concentrated on the refrigerator rear surface. Therefore, no condenser is arranged in the other outer box. Therefore, the amount of heat entering the cabinet is reduced by the embedded vacuum heat insulating material. Moreover, since the condenser and the vacuum heat insulating material on the back of the refrigerator are grounded between the flat portions, they can be integrally bonded in advance before assembling the refrigerator, and the number of work steps during assembly can be reduced.

  The invention according to claim 4 is the invention according to claim 2, wherein the condenser is provided together with a vacuum heat insulating material on a part or the whole of the side surface of the refrigerator, and when installing the refrigerator in the kitchen, Since the gap on the side surface is larger than that on the back surface, natural convection of the outside air is easily promoted, and as a result, the heat radiation amount is increased. In addition, since the condenser is concentrated on the side of the refrigerator, no condenser is arranged in the other outer box. Therefore, the amount of heat entering the cabinet is suppressed by the vacuum heat insulating material to be embedded. Moreover, since the condenser and the vacuum heat insulating material on the side surface of the refrigerator have a structure in which the flat portions are grounded to each other, and can be integrally bonded and formed in advance before assembling the refrigerator, it is possible to reduce the man-hours for assembling.

  The invention according to claim 5 is the invention according to claim 3 or 4, wherein the internal flow path of the condenser is provided at least partially around the periphery of the refrigerator compartment. The temperature difference between the inside and the outside of the refrigerator is smaller than that in the freezer compartment, and the amount of heat entering from the outside of the refrigerator into the interior is smaller than the amount of heat entering the freezer compartment. Therefore, the total intrusion heat from the outside to the inside can be reduced.

  The invention described in claim 6 is the invention described in claim 3 or 4, wherein the internal portion that is provided in the periphery of the refrigerator compartment with respect to the internal flow channel volume of the condenser that is provided in the periphery of the freezer compartment. Since the volume of the flow path is large and the condenser is disposed over the entire rear surface or side surface of the refrigerator, the condensation area is ensured and the heat radiation capability is sufficiently obtained. Moreover, since the temperature difference between the inside and outside of the refrigerator compartment is smaller than that of the freezer compartment, the amount of heat entering from the outside of the refrigerator into the inside of the refrigerator can be made smaller than the amount of heat entering the freezer compartment.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein a part or the whole of the outer surface shape of the condenser is a convex part, and the refrigerator is installed. At this time, since the convex portion contacts the kitchen wall, a sufficient gap is generated between the condenser and the kitchen wall. As a result, the retention of air in the external space is reduced and the increase in the outside air temperature is suppressed, so that the amount of heat transfer from the condenser to the outside air is ensured.

  The invention according to an eighth aspect is the invention according to any one of the second to seventh aspects, wherein a condenser is additionally provided in a refrigerant pipe from the compressor to the condenser, By adding, the temperature of a refrigerant | coolant falls. Since it flows into the flow path of the condenser in this state, high-temperature deterioration of the vacuum heat insulating material provided together with the condenser can be prevented in advance.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein a heat radiation paint is applied to the surface of the condenser, and the heat passage rate from the condenser to the outside air is high. It has the effect of improving and increasing the heat dissipation capability.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein the surface of the condenser is raised, and the boundary layer thickness on the condenser surface is larger than the conventional one. Since it becomes thinner, the heat transfer rate increases and the temperature difference between the refrigerant flowing through the condenser internal flow path and the outside air increases, resulting in an increase in the amount of heat transfer.

  The invention according to claim 11 is the invention according to any one of claims 1 to 10, wherein the internal flow path of the condenser is configured such that the refrigerant once reaches the upper part of the refrigerator and flows downward of the refrigerator. In the upper part of the refrigerator, the high temperature air exchanged with the condenser is greatly separated from the refrigerator, so that the air temperature is kept relatively low. Further, below the refrigerator, the outside air is not affected by the heat from the periphery thereof, and the high temperature air due to heat exchange always moves to the upper side of the refrigerator, so that the low temperature is always maintained. Therefore, the total heat exchange amount increases.

  The invention according to claim 12 is the invention according to any one of claims 1 to 11, wherein the internal flow path of the condenser is configured by a plurality of paths, and the flow path of the refrigerant Reduce loss.

  A thirteenth aspect of the present invention is the invention according to any one of the first to twelfth aspects of the present invention, wherein the condenser material is an aluminum alloy aluminum such as 1050, 1100, 5154, 5254, 5083, 5086 in JIS designation. It is formed from one of the alloys, and can prevent breakage of the condenser, leakage of the refrigerant, and the like against the high pressure of the working refrigerant in the condenser.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. Further, the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is an external inclination view of the refrigerator according to the embodiment, FIG. 2 is an exploded view of the outer box constituting the heat insulation box of the refrigerator according to the embodiment, and FIG. 3 is an air passage configuration diagram of the refrigerator according to the embodiment. 4 is a refrigeration cycle diagram of the refrigerator according to the embodiment, FIG. 5 is a front view of the refrigerator according to the embodiment as viewed from the inside of the back plate in FIG. 2, and FIG. 6 is a diagram of the refrigerator according to the embodiment. It is AA 'principal part sectional drawing in FIG.

  The refrigerator 101 according to the first embodiment includes a heat insulating box made of a steel plate outer box 102 that opens forward, a hard resin inner box 103, and a urethane heat insulating material 104 that is foam-filled between the outer box 102 and the inner box 103. 106, the refrigerating room 106c and the freezing room 106d separated by the internal partition wall 106a, the refrigerating room door 106f, the freezing room door 106g, the gasket 107 for sealing the heat insulating box 106, and the temperature of the refrigerating room 106c are detected. Refrigerating room sensor 108, freezing room sensor 109 for detecting the temperature of freezing room 106d, refrigerating room damper 110 for adjusting the cooling air to the refrigerating room, and cooling disposed on the back of freezing room 106d constituting the refrigerating cycle of the refrigerator. 111, a compressor 112 disposed in a machine room (not shown) below the back of the refrigerator 101, and a capillary tube 11 serving as a decompressor 3, and a blower fan 114 that sends cool air to each room and a condenser 120.

  2 and 5, the outer box 102 is composed of a back plate 102a, a side plate 102b, a top plate 102c, and a bottom plate 102d. The condenser 120 of this embodiment is a roll bond type heat exchanger, and the back plate The entire 102a is shared.

  When the refrigerant that has flowed out of the compressor 112 flows into the condenser 120, the refrigerant flows through the internal flow path 121 of the condenser 120 once above the back plate 102 a, and then the entire back plate 102 a toward the bottom of the back plate 102 a. It is configured to flow to the area.

  The roll bond is generally used for an evaporator, a panel heat exchanger, a solar heat collecting plate, etc. As a manufacturing method, a flow in which a refrigerant flows by screen printing on an aluminum plate having a cleaned surface. Print anti-bonding agent on the road. Next, another clean aluminum plate is stacked and rolled under high pressure to form a single piece. Thereafter, high-pressure gas is sealed in the pressure-bonding prevention portion, and the flow passage portion is expanded to form a hollow portion. The thickness of the hollow plate shape in which the internal flow path 121 is formed is preferably about 2 mm to 6 mm.

  Further, as a material for the back plate 102a which is the condenser 120, an aluminum alloy having a purity of 99% or more such as 1050 or 1100 is generally used in view of good properties such as workability and corrosion resistance. Alternatively, aluminum alloy such as 5154, 5254, 5083, 5086, etc., to which the strength is increased by adding magnesium may be used as the back plate 102a which is the condenser 120.

  The operation of the refrigerator of the present embodiment configured as described above will be described below with reference to FIGS.

  The condition for starting the operation of the refrigerator 101 is when the temperature of the refrigerator compartment sensor 108 or the freezer compartment sensor 109 is equal to or higher than the starting temperature, and the condition for stopping the operation is that both the refrigerator compartment sensor 108 and the freezer compartment sensor 109 are operated. This is the case of the stop temperature or lower.

  First, cooling of the freezer compartment 106d will be described. The compressor 112 is activated when the freezer compartment 106d rises in temperature due to the intrusion heat from the outside air and the open / close of the freezer compartment door 106f and the freezer compartment door 106g and the freezer compartment sensor 109 reaches the starting temperature or higher. Then cooling starts. The high-temperature and high-pressure refrigerant discharged from the compressor 112 flows into the internal flow path 121 of the back plate 102a (condenser 120) of the outer box 102, and exchanges heat with the air outside the back plate 102a and the urethane heat insulating material 104. To cool and liquefy. Further, the liquefied refrigerant is depressurized by the capillary tube 113, flows into the cooler 111, and cools the interior by heat exchange with the air in the warehouse around the cooler 111. Here, the refrigerant is heated and gasified, and returns to the compressor 112. When the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor 109 becomes equal to or lower than the stop temperature, and the temperature of the refrigerator compartment sensor 108 becomes equal to or lower than the stop temperature, the operation of the compressor 112 is stopped.

  Next, cooling of the refrigerator compartment 106c will be described. Similar to the freezer compartment 106d, when the internal temperature rises and the temperature of the refrigerating compartment sensor 108 becomes equal to or higher than the starting temperature, the refrigerating compartment damper 110 is opened and the operation of the compressor 112 is started. The cool air from the cooler 111 flows into the refrigerating chamber 106c by the blower fan 114 to cool the internal air temperature, the refrigerating chamber sensor 108 temperature becomes lower than the stop temperature, and the freezer compartment sensor 109 temperature falls below the stop temperature. In this case, the operation of the compressor 112 is stopped. The refrigerator compartment damper 110 in the air path between the refrigerator compartment 106c and the cooler 111 is fully closed when the temperature of the refrigerator compartment 106c is equal to or lower than the stop temperature, and the compressor 112 is operated when the temperature of the freezer compartment 106d is equal to or higher than the stop temperature. Even if the operation is continued, freezing is prevented by preventing the temperature of the refrigerator compartment 106c from dropping below the temperature at this point.

  In the case of a copper tube that is a conventional condenser, an outer box 102 corresponding to the back plate 102a and an adhesive (not shown) are interposed between the copper tube and the air outside the cabinet. However, as shown in FIG. 2, the condenser 120 of the present embodiment shares the back plate 102a, so the heat transfer distance from the refrigerant to the outside air is shortened.

  Further, since the heat transfer area from the refrigerant in the internal flow path 121 to the back plate 102a is increased as compared with the conventional case, the heat transfer area from the back plate 102a to the outside air is also increased.

  In addition, the ambient gas outside the chamber which has exchanged heat with the refrigerant in the internal flow path 121 rises in temperature and the gas density decreases and moves upward. As a result, an air flow from the lower side to the upper side of the back plate 102a is formed. Here, as in the present embodiment, the internal flow path 121 of the condenser 120 mainly has a configuration in which the refrigerant flows from the upper side to the lower side of the back plate 102a, so that the refrigerant and the atmospheric gas are passed above the back plate 102a having a high refrigerant temperature. Heat exchange takes place. As a result, the atmospheric gas that has reached a high temperature is eliminated upward of the refrigerator, and the temperature of the atmospheric gas in the vicinity of the condenser 120 is kept low. Therefore, the temperature difference between the atmospheric gas and the refrigerant becomes sufficiently large. In addition, the atmospheric gas temperature is lower than the upper side below the back plate 102a where the refrigerant temperature is sufficiently lower than the upper side, so that the temperature difference between the atmospheric gas and the refrigerant is kept sufficiently large.

  From the above results, sufficient heat dissipation capability is ensured, the condensation temperature is lowered, and the compression ratio of the refrigeration cycle is reduced. As a result, the shaft power of the compressor 112 is reduced, and the COP of the cooling system can be finally increased by increasing the volumetric efficiency.

  The material of the back plate 102a corresponding to the condenser 120 of the present embodiment is 1050 or 1100 aluminum alloy with good workability, but even if an aluminum alloy such as 5154, 5254, 5083, 5086 is used, A similar heat dissipation effect can be obtained. This is because these alloys contain magnesium and thus have high strength and high corrosion resistance in addition to workability.

  Note that the back plate 102a corresponding to the condenser 120 of this embodiment is configured only on one side of the back surface of the refrigerator 101, but the side plate 102b, the top plate 102c, and the bottom plate 102d of the outer box 102 of the refrigerator 101 are provided with a condenser. Even if 120 is used in combination, the same effect can be obtained.

(Embodiment 2)
7 is an exploded view of the outer box constituting the heat insulation box of the refrigerator according to the second embodiment of the present invention, FIG. 8 is a transverse sectional view of the refrigerator according to the same embodiment, and FIG. 9 is a diagram of the refrigerator according to the same embodiment. FIG. 10 is an exploded view of the outer box in which the side plate according to the embodiment is also used as a condenser.

  A box cross-sectional view of a refrigerator using a condenser constituted by corrugated flat plates according to the embodiment is shown in FIGS. 7, 8, 9, and 10, 201 is a refrigerator, 202 is a steel plate outer box opened forward, 203 Is an inner box made of hard resin, 204 is a urethane heat insulating material foam filled between the outer box 202 and the inner box 203, 205 is a vacuum heat insulating material provided on the outer box 202 side of the urethane heat insulating material 204, and 206 is urethane heat insulating material. A heat insulating box body 220 composed of the material 204 and the vacuum heat insulating material 205 is a condenser.

  Here, the outer box 202 is composed of a back plate 202a, a side plate 202b, a top plate 202c, and a bottom plate 202d. The condenser 220 of the present embodiment is a roll bond heat exchanger integrated on the entire back plate 202a. Yes, the back plate 202a is shared. The refrigerant flowing out from the compressor 112 flows into the internal flow path 221 of the condenser 220 from FIG. 9, and then moves upward on the back plate 202a. Thereafter, the refrigerant flow path is divided into a plurality of parts, and in parallel, the refrigerant flows toward the lower side of the back plate 202a and is aggregated again. Furthermore, in this embodiment, the convex portion 225 is formed by embossing the flat plate portion 223 of roll bond.

  The inner surface side of the back plate 202a, which is the condenser 220, has a planar shape, and is bonded to the vacuum heat insulating material 205 with an adhesive 230 in this embodiment. Other outer boxes and vacuum insulation are also bonded. Further, the heat radiation paint 270 is applied to the entire surface of the condenser 220.

  About the refrigerator of this Embodiment comprised as mentioned above, the operation | movement is demonstrated below.

  As shown in FIG. 8, the condenser 220 of the present embodiment shares the back plate 202a, so that the heat transfer distance from the refrigerant to the outside air is shortened. Further, since the heat transfer area from the refrigerant in the internal flow path 221 to the back plate 202a is increased as compared with the conventional case, the heat transfer area from the back plate 202a to the outside air is also increased. Further, since the heat radiation paint 270 is applied to the surface of the condenser 220, the heat transfer coefficient between the condenser 220 and the air is increased, and the heat passage ratio from the refrigerant to the air is greatly improved. In addition, by forming a plurality of refrigerant flow paths, the amount of pressure drop that occurs while the refrigerant gas flows through the condenser can be reduced, so that the temperature difference between the refrigerant and the outside atmosphere gas can be increased.

  As described above, the heat dissipation area, the heat transfer rate, and the temperature difference between the refrigerant and the outside atmosphere gas respectively increase, so that the heat dissipation capability is sufficiently ensured, and the condensation temperature is finally lowered to reduce the compression ratio of the refrigeration cycle. . As a result, the shaft power of the compressor 112 is reduced, and the COP of the cooling system can be finally increased by increasing the volumetric efficiency.

  Further, since the condenser 220 is concentrated on the back plate 202a and the conventional condenser 20 installed on the inner surface of the other outer box 202 is abolished, the vacuum heat insulating material 205 is used for the entire outer box 202 including the back plate 202a. The area can be covered. Therefore, the thermal conductivity of the vacuum heat insulating material 205 can be reduced to about 0.1 to 0.2 as compared with the conventional urethane heat insulating material, the ambient gas outside the chamber, the heat passage rate from the condenser 220 into the chamber, and the amount of intrusion heat. Can be greatly reduced. As a result, the power consumption of the refrigerator can be significantly reduced by shortening the cooling operation time of the refrigerator.

  Furthermore, the back plate 202a, the side plate 202b, the top plate 202c, and the bottom plate 202d as the outer box 202 can be easily bonded to the vacuum heat insulating material 205 in each plane, and can be integrally processed before assembling the refrigerator. The number of work steps when assembling the refrigerator can be reduced.

  In addition, in this Embodiment, although the condenser 220 is shared by the roll bond heat exchanger concentrated on the whole back plate 202a of the outer box 202, as shown in FIG. 10, the side plate 202b of the outer box 202 is used. Even in the case where the roll bond heat exchanger is aggregated and arranged in a part or the whole, a heat radiation capability equal to or higher than that can be obtained, and the amount of heat entering the cabinet can be reduced. Furthermore, since the refrigerator 201 can be assembled by the integrally molded product of the vacuum heat insulating material 205 and the outer box 202, the number of assembling steps can be reduced.

(Embodiment 3)
FIG. 11 is an external inclination view of the refrigerator according to the embodiment of the present invention, FIG. 12 is an exploded view of the outer box constituting the heat insulation box of the refrigerator according to Embodiment 3 of the present invention, and FIG. 11 is a cross-sectional view of the main part BB ′ in FIG. 11, FIG. 14 is an exploded view of an outer box in which a refrigerant flow path is additionally provided around the freezer compartment of the refrigerator according to the embodiment, and FIG. 15 is a refrigerator according to the embodiment. It is an outer case exploded view by which the convex-shaped refrigerator transport handle was arrange | positioned at the back plate of this.

  11, 12, 13, 14, and 15, 301 is a refrigerator, 302 is an outer box made of steel plate that opens forward, 303 is an inner box made of hard resin, and 304 is foamed between the outer box 302 and the inner box 303. Filled urethane heat insulating material, 305 is a vacuum heat insulating material embedded in the outer box 302 side of the urethane heat insulating material 304, 306 is a heat insulating box made up of the urethane heat insulating material 304 and the vacuum heat insulating material 305, 320 and 326 are condensed It is a vessel.

  Here, the outer box 302 includes a back plate 302a, a side plate 302b, a top plate 302c, and a bottom plate 302d, and the back plate 302a includes a convex flat surface 302e and an oblique flat surface 302f. The condenser 320 of the present embodiment shares the back plate 302a with a roll bond heat exchanger in which an internal flow path 321 is disposed around the refrigerating chamber on the oblique plane 302f of the back plate 302a. In addition, the refrigerant that has flowed out of the compressor 112 (not shown) first flows into the condenser 326 in the machine chamber 380, and then flows into the internal flow path 321 disposed on the oblique plane 302f of the back plate 302a. To do.

  About the refrigerator of this Embodiment comprised as mentioned above, the operation | movement is demonstrated below.

  As shown in FIG. 13, the condenser 320 of the present embodiment shares the back plate 302a, so the heat transfer distance from the refrigerant to the outside air is shortened, and the heat transfer area is also increased. Furthermore, when the refrigerator is installed, the back surface may be brought close to the kitchen wall. However, if the condenser 320 of this embodiment can sufficiently secure a gap with the kitchen wall, convective heat transfer can be promoted, The heat transfer coefficient between the condenser 320 and the air increases. As described above, sufficient heat dissipation capability is ensured, and finally the COP of the cooling system can be increased.

  12, the internal flow path 321 is disposed in the center of the back plate 302a area around the refrigerator compartment 301, so that the temperature difference between the inside and outside atmosphere temperature is about 15K, and the temperature between the freezer compartment and the atmosphere temperature is about 15K. Since heat is radiated in a region smaller than the temperature difference 40K, the amount of heat entering from the outside to the inside is reduced compared to the case where the internal flow path 321 is installed around the freezer compartment.

  From FIG. 13, the condenser 320 is concentrated on the back plate 302a, and the other condenser 320 inside the outer box 302 is abolished, so that the vacuum heat insulating material 305 can be covered over the entire area of the outer box 302 including the back plate 302a. Become. Therefore, since the thermal conductivity can be reduced to about 0.1 to 0.2 as compared with the conventional urethane heat insulating material 304, the heat passage rate and the intrusion heat amount from the atmospheric gas outside the warehouse to the inside can be reduced. Therefore, the power consumption of the refrigerator can be greatly reduced by reducing the cooling operation time of the refrigerator.

  11, 12, and 13, the refrigerant gas passes through the condenser 326 in the machine chamber 380 before flowing into the condenser 320 sharing the back plate 302a. At this time, the refrigerant exchanges heat and flows into the internal flow path 321 of the condenser 320 in a state where the temperature is lowered. Therefore, since the vacuum heat insulating material 305 provided together with the condenser 320 has a small amount of heat transfer from the condenser 320, it is possible to guarantee long-term heat insulating performance without causing deterioration or destruction of the vacuum heat insulating material.

  In the present embodiment, as shown in FIG. 14, even when the internal flow path 321 is partially provided on the side of the freezer compartment where the temperature is low, the condenser 320 and the vacuum heat insulating material 305 are provided. The same heat dissipation effect can be obtained.

  In the present embodiment, the condenser 320 is shared with the back plate 302a. However, when the other outer box 302 is partially shared as a condenser, the same heat dissipation effect can be obtained.

  In this embodiment, the refrigerator transport handle 390 is disposed on the outer plate 302 on the back plate 302a as shown in FIG. 15, so that when the refrigerator 301 is installed in the kitchen, the gap between the outer box and the kitchen wall. Can be secured, and sufficient heat dissipation capability can be obtained. Further, the same effect can be obtained by installing the refrigerator control board BOX as a convex portion of the outer box 302.

  As described above, the refrigerator according to the present invention can suppress the intrusion heat amount from the atmospheric gas outside the condenser and the inside of the box and can improve the heat radiation capacity of the condenser. It is useful as an energy-saving measure for cooling equipment using vacuum insulation.

External appearance inclination figure of the refrigerator by Embodiment 1 of this invention Outer box exploded view constituting the heat insulation box of the refrigerator of the same embodiment Air passage configuration diagram of refrigerator according to the embodiment Refrigeration cycle diagram of the refrigerator of the same embodiment The front view seen from the warehouse inner side of the backplate in FIG. 2 of the refrigerator by the same embodiment AA 'sectional view in FIG. 5 of the refrigerator according to the embodiment. Outer box exploded view constituting the heat insulation box of the refrigerator according to the second embodiment of the present invention Cross-sectional view of the refrigerator according to the embodiment The front view seen from the warehouse outside of the back board in Drawing 7 of the refrigerator by the embodiment Outer box exploded view with side plate combined with condenser according to the same embodiment Appearance inclination figure of the refrigerator by Embodiment 3 of this invention Outer box exploded view constituting the heat insulation box of the refrigerator according to the third embodiment of the present invention. BB 'principal part sectional drawing in FIG. 11 of the refrigerator by the same embodiment Appearance inclined view in which a refrigerant channel is arranged around the freezer compartment of the refrigerator according to the embodiment Outer box exploded view in which convex-shaped refrigerator transport handles are arranged on the back plate of the refrigerator according to the embodiment Partially cutaway perspective view of a conventional refrigerator EE 'sectional view in FIG. 1 of a conventional refrigerator Cross section of other conventional refrigerator insulation box Cross section of other conventional refrigerator insulation box

Explanation of symbols

101, 201, 301 Refrigerator 102, 202, 302 Outer box 102a, 202a, 302a Back plate 103, 203, 303 Inner box 104, 204, 304 Urethane insulation 106, 206, 306 Insulation box 120, 220, 320 Condenser 121, 221, 321 Internal flow path 205, 305 Vacuum heat insulating material 222 Multiple paths 225 Convex part 270 Heat radiation paint 302 e Convex part plane 326 Condenser

Claims (13)

An outer box that forms an outer wall, an inner box that forms an inner wall of the cabinet, and a heat insulating box body that is made of a foam-filled heat insulating material between the outer box and the inner box. A refrigerator comprising a formed hollow plate-shaped condenser in a part or the whole of the outer box. An outer box that forms an outer wall, an inner box that forms an inner wall of the cabinet, a heat insulating material that is foam-filled between the outer box and the inner box, and a heat insulating box that is made of a vacuum heat insulating material embedded in the heat insulating material. The refrigerator is characterized in that the outer box is formed with a condenser having a hollow plate shape forming an internal flow path in a part or the whole of the outer box. The refrigerator according to claim 2, wherein the condenser is provided together with a vacuum heat insulating material on a part or the whole of a rear surface of the refrigerator. The refrigerator according to claim 2, wherein the condenser is provided with a vacuum heat insulating material on a part or the whole of a side surface of the refrigerator. 5. The refrigerator according to claim 3, wherein the internal flow path of the condenser is provided at least partially around the periphery of the refrigerator compartment. 5. The refrigerator according to claim 3, wherein the volume of the internal flow path provided in the periphery of the refrigerator compartment is larger than the volume of the internal flow path of the condenser provided around the freezer compartment. The refrigerator as described in any one of Claim 1 to 6 from which the one part or the whole surface shape of the outer side of the said condenser becomes a convex part. The refrigerator according to any one of claims 1 to 7, wherein a condenser is disposed in a refrigerant pipe from a compressor to the condenser. The refrigerator according to any one of claims 1 to 8, wherein a heat radiation paint is applied to a surface of the condenser. The refrigerator according to any one of claims 1 to 9, wherein a surface of the condenser is raised. The refrigerator according to any one of claims 1 to 10, wherein the internal flow path of the condenser has a configuration in which the refrigerant once reaches the upper part of the refrigerator and flows downward. The refrigerator according to any one of claims 1 to 11, wherein the internal flow path of the condenser is configured by a plurality of passes. The refrigerator according to any one of claims 1 to 12, wherein a material of the condenser is formed of any one of aluminum alloys of 1050, 1100, 5154, 5254, 5083, and 5086 according to JIS name.

Images