JP2008116161A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems on reduction of inner capacity, increase of power consumption and increase of costs in a refrigerator which secures its reliability by increasing a wall thickness of a heat insulating material such as polystyrene foam, and distributing electric power to a heater for preventing dew condensation and frosting, as temperature difference between a surface of a heat insulating partition for partitioning a cooler of a refrigerator and the inside of the refrigerator, and a room where the refrigerator is installed is great, and dew condensation and frosting are found by being cooled by the cooler and the cold air discharged from the cooler. <P>SOLUTION: A heat insulating material obtained by integrally foaming the heat insulating material such as polystyrene foam and a vacuum heat insulating material 127 is used as the heat insulating material of the heat insulating partitioning portion for partitioning the inside of the refrigerator and a cooling compartment 109 disposed at a section inside of the refrigerator and receiving the cooler 107. As heat conduction from the cooler 107 to the inside of the refrigerator can be remarkably reduced, and heat absorption and an energization ratio of the heater for preventing dew condensation and frosting can be lowered by heat insulating effect of the vacuum heat insulating material 127, power consumption can be reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a refrigerator using a vacuum heat insulating material.

  In recent years, as the demand for large-capacity refrigerators increases, refrigerators that improve volumetric efficiency by reducing the ineffective space and refrigerators with various layouts from the viewpoint of usability have been released (for example, see Patent Document 1).

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

  10 and 11 show a front view and a side sectional view of the refrigerator described in Patent Document 1. FIG. 10 and 11, 1 is a refrigerator main body, 2 is a refrigeration room maintained at a refrigeration temperature (about + 5 ° C.), 3 is provided under the refrigeration room, and refrigeration, vegetables, chilled, etc. A switching room that can be switched to a temperature zone, and an ice making room 4 and 5 provided in parallel with the switching room 3 under the refrigeration room 2 are vegetable rooms for storing foods such as vegetables that are not to be dried, and 6 is frozen. It is a freezing room cooled to a temperature (about −20 ° C.). The bottom of the freezer compartment has a shape in which the bottom wall 23 rises upward, and a machine room 19 is formed outside the rear portion of the bottom wall 23.

  In the machine room 19, a compressor 17 constituting a cooling system, an evaporating dish (not shown), a heat radiating fan (not shown), and a condenser (not shown) are installed. Reference numeral 9 denotes a cooling chamber disposed on the back side of the vegetable room, in which a cooler 7 and a cool air blower fan 8 for circulating the cool air cooled by the cooler 7 are accommodated.

  Reference numeral 10 denotes a first partition that divides the refrigerator main body 1 into upper and lower parts and partitions the refrigerator compartment 2, and 11 denotes a second partition that partitions the cooling chamber 9 on the lower rear side of the refrigerator 1 partitioned by the first partition part 10. A partition part, 21 is a fan grill that forms the front surface of the second partition part 11, and 20 is a rear surface of the second partition part 11, and each air return air passage for sending cold air from the cold air fan to each room is provided. An air guide 22 to be formed is a molded heat insulating material provided between the fan grill 21 and the air guide 20. Reference numeral 12 denotes a third partition that divides the lower front of the refrigerator 1 divided by the first partition up and down to separate the switching chamber 3 and the ice making chamber 4 from the vegetable compartment, and 13 denotes the vegetable compartment 5 and the cooling compartment 9. And a fourth partition 14 that partitions the freezer compartment 6, and 14 is a front edge partition that constitutes the front edge of the refrigerator body 1 that partitions the freezer compartment 6 and the vegetable compartment 5.

As a result, the refrigerator compartment, the vegetable compartment 5, and the freezer compartment 6 are arranged in easy-to-use positions, and a refrigerator with improved usability is realized. The vegetable room 5 which is frequently used is arranged at a position where it is easy to take out without crouching, and the usability is improved. In particular, the freshness of vegetables must be monitored at all times, given that freshness quickly deteriorates.
JP 2002-13864 A

  However, in the above-described conventional configuration, the surface of the second partition is condensed or dewed due to the temperature difference between the inside of the front chamber of the second partition and the cooling chamber that forms the air passage through which the cool air discharged from the cooler passes. Had the problem of frost formation. In particular, when the front surface of the second partition is highly humid, such as a vegetable room, condensation or frost formation on the surface of the second partition is obvious. It was necessary to enlarge or to attach a heater to the surface of the second partition. If necessary, by increasing the energization rate of the attached heater, it is necessary to evaporate moisture due to condensation and frost adhering to the surface, or to ensure that the surface temperature of the partition is always above the dew point temperature. there were. For this reason, it has been insufficient for the recent demand for increasing the capacity of the refrigerator, reducing the installation space, and the need for energy saving. This is because, in order to increase the capacity of the refrigerator, it is effective to reduce the thickness of the refrigerator heat insulation wall and to eliminate the invalid space. Therefore, the increase in the endothermic load is minimized by using a high-performance heat insulating material such as a vacuum heat insulating material. Increasing the heat insulating wall thickness of the second partition portion leads to a decrease in the internal capacity. On the contrary, if the internal capacity is maintained, the air passage area to each room must be reduced. In this case, there is a problem that the cooling capacity may be lowered. In addition, in order to prevent dew condensation and frost formation due to heating by increasing the heater energization rate, in addition to the increase in power consumption due to heater energization, the operating rate of the compressor increases as the heat load to the cabinet, and the power consumption Had the problem of becoming higher.

  Moreover, when the front surface is a vegetable room, the vegetables accommodated in the back portion due to the heat effect of the heater have a problem that the temperature is partially increased and the deterioration of the vegetables is promoted.

  In addition, when the front is a vegetable room, there are often no door switches for the vegetable room, and the operation of the cold air fan is not controlled by opening and closing the vegetable room, so even if the vegetable room is opened, the wind noise of the fan can be heard. The problem was that the noise was very worrisome.

  The present invention solves the above-mentioned problem, and provides a refrigerator with a large internal capacity, a high energy-saving performance, and an excellent quietness because it can improve the heat insulation of the partition with the cooling chamber. With the goal.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is a heat insulating material such as expanded polystyrene as a heat insulating material for a heat insulating partition that partitions the inside of the storage and the cooling chamber that stores the cooler. A material obtained by integrally foaming a material and a vacuum heat insulating material is used.

  As a result, the heat conduction from the cooler to the inside of the cabinet can be suppressed due to the influence of the vacuum heat insulating material having better heat conductivity than the heat insulating material such as expanded polystyrene, and the heat absorption amount and the heater energization rate can be lowered. , Can reduce power consumption.

  The refrigerator of the present invention can reduce the heat absorption amount of the room in front of the cooling chamber by using a heat insulating material in which the vacuum heat insulating material is integrally foamed as the heat insulating material in the heat insulating partition part that partitions the cooling chamber and the inside of the refrigerator, and cool air blow Since fan noise can be prevented, energy saving and noise reduction can be achieved with a large capacity.

  The refrigerator according to claim 1 is provided with an interior, a cooling chamber that is disposed in a part of the interior and that stores a cooler, and an insulating partition that partitions the interior and the cooling chamber. The heat insulating material of the part is obtained by integrally foaming a heat insulating material such as expanded polystyrene and a vacuum heat insulating material.

  In this way, by mixing vacuum heat insulating material with better heat conductivity than heat insulating material such as polystyrene foam, heat conduction into the chamber can be suppressed, heat absorption amount and heater energization rate can be reduced, power consumption Since the amount can be reduced and the rigidity of the heat insulating partition unit can be increased, the yield due to cracking or the like can be improved.

  The refrigerator of Claim 2 arrange | positions the arrangement | positioning of the vacuum heat insulating material in a heat insulation partition part near the cooler side.

  Thereby, since the wall thickness of a heat insulating material can be made thin, the capacity | capacitance in a warehouse can be enlarged. In addition, since the surface of the vacuum heat insulating material is a metal foil such as aluminum with high thermal conductivity, the heat of the heater can be transferred to the upper part of the cooler through the surface of the vacuum heat insulating material at the time of defrosting. The defrosting time can be shortened.

  In the refrigerator according to claim 3, the arrangement of the vacuum heat insulating material in the heat insulating partition is arranged close to the inside of the cabinet.

  Thereby, since the wall thickness of a heat insulating material can be made thin, the capacity | capacitance in a warehouse can be enlarged. Many of the coolers use the fin-and-tube method, but by placing them inside the cabinet, it is possible to prevent the surface of the vacuum insulation material from being damaged by fins on the surface of the cooler. Can be secured.

  In the refrigerator according to claim 4, the arrangement of the vacuum heat insulating material in the heat insulating partition is covered with the heat insulating material.

  Thereby, since the rigidity of a heat insulating material can be raised, the improvement of the yield by the crack etc. at the time of attachment of a heat insulation partition component can be aimed at. In addition, since heat wraparound from the jacket material around the vacuum heat insulating material can be eliminated, heat intrusion into the cabinet can be reduced, and the heater energization rate can be reduced. Can be lowered.

  The refrigerator according to claim 5 has a metal foil jacket material on the surface of the vacuum heat insulating material in the heat insulating partition. As a result, the gas barrier property can be improved, so that the deterioration of the vacuum heat insulating material over time can be suppressed, and the heat insulating performance can be secured over a long period of time.

  The refrigerator according to claim 6 is a vacuum heat insulating material that covers a plurality of core materials with a laminate film having gas barrier properties as a vacuum heat insulating material in a heat insulating partition portion and is vacuum-sealed in a plurality of independent spaces on the same plane. Since the vacuum heat insulating material can be formed even in a complicated shape, the coverage of the vacuum heat insulating material can be increased in the heat insulating partition portion, the energization rate of the heater can be decreased, and the power consumption can be decreased.

  Since the refrigerator according to claim 7 can improve the gas barrier property by configuring the structure of the outer cover material of the vacuum heat insulating material to have at least a vapor deposition layer and a polyacrylic acid resin layer adjacent to the vapor deposition layer, The deterioration over time of the heat insulating material is suppressed, and the heat insulating performance can be secured over a long period of time.

  The refrigerator according to claim 8 has a configuration in which a heat insulating partition part integrally foamed with a vacuum heat insulating material is divided into cooling rooms that span at least two rooms. Thereby, the cold heat from the cooler can be reduced by the vacuum heat insulating material arranged in the upper limit direction and having a creepage distance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a perspective view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view of the refrigerator according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of a vacuum heat insulating material used for the heat insulating material according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view of the heat insulating material according to Embodiment 1 of the present invention. FIG. 5 is an integrated foaming process diagram of the vacuum heat insulating material and the expanded polystyrene according to Embodiment 1 of the present invention. FIG. 6 is a horizontal integrated foaming process diagram of the vacuum heat insulating material and the expanded polystyrene according to Embodiment 1 of the present invention.

  As shown in FIGS. 1 to 4, the refrigerator main body 101 includes a metal (for example, iron plate) outer box 115, a hard resin (for example, ABS) inner box 116, an outer box 115, and an inner box 116 that are opened forward. A heat insulating box made of urethane heat insulating material 124 filled with foam between the refrigerator compartment 102 provided in the upper part of the main body and the refrigerator compartment provided below the refrigerator compartment, such as refrigerator, vegetables, chilled, etc. A switching chamber 103 that can be switched to a temperature zone, an ice making chamber 104 that is provided in parallel to the switching chamber 103 under the refrigeration chamber 102, a freezing chamber 106 that is provided in the lower part of the main body, and a switching chamber 103 that is installed in parallel. And a vegetable room 105 provided between the ice making room 104 and the freezing room 106. The switching chamber 103, the ice making chamber 104, the vegetable chamber 105, and the freezing chamber 106 can be opened and closed freely by a drawer door (not shown), and the front of the refrigerator compartment 102 can be opened and closed by a door opening door (not shown), for example. Freely blocked.

  The refrigerator compartment 102 is normally set at 1 to 5 ° C. with the temperature at which it is not frozen for refrigerated storage as the lower limit. The vegetable room 105 is often set to a temperature setting of 2 ° C. to 7 ° C., which is equal to or slightly higher than that of the refrigerator room 102. If the temperature is lowered, the freshness of leafy vegetables can be maintained for a long time. The freezer compartment 106 is normally set at −22 to −18 ° C. for frozen storage, but may be set at a low temperature of −30 to −25 ° C., for example, to improve the frozen storage state.

  The refrigerator compartment 102 and the vegetable compartment 105 are called a refrigerator temperature zone because the inside is set at a plus temperature. Moreover, since the freezer compartment 106 and the ice making compartment 104 are set at a minus temperature in the interior, they are called freezing temperature zones.

  The top surface portion of the refrigerator main body 101 is provided with a machine room 119 provided with a dent in a step shape toward the back surface of the refrigerator, and is configured by a first top surface portion and a second top surface portion. A compressor 117 disposed in the stepped recess, a dryer (not shown) for removing moisture, a condenser (not shown), a heat radiating pipe (not shown), a capillary tube 118, Then, the refrigerant is sealed in a refrigeration cycle in which the cooler 107 is sequentially connected in an annular manner, and a cooling operation is performed. In recent years, a flammable refrigerant is often used as the refrigerant for environmental protection.

  The refrigerator compartment 102, the ice making compartment 104, and the switching compartment 103 are partitioned by a first partition 110. For example, when the switching chamber 103 is only in the freezing temperature zone, the first partition 110 may be a heat insulating partition using a heat insulating material such as foamed urethane, or may be configured only in the refrigeration temperature zone. If this is the case, the internal capacity may be increased by eliminating heat insulation and making the partition as thin as possible. In this case, it cools with the cool air of a refrigerator compartment.

  The ice making chamber 104, the switching chamber 103, and the vegetable chamber 105 are partitioned by a third partition 112.

  The vegetable compartment 105 and the freezing compartment 106 are partitioned by a fourth partition 113. Since the fourth partition 113 is a part that is assembled after foaming of the refrigerator main body 101, the foamed polystyrene 126 is usually used as a heat insulating material, but hard foamed urethane may be used to improve heat insulating performance and rigidity. Furthermore, a highly heat-insulating vacuum heat insulating material may be inserted to further reduce the thickness of the partition structure.

  A cooling chamber 109 is provided on the rear surface of the refrigerator main body 101, and the cooling chamber 109 is partitioned from the vegetable compartment 105 by a second partition portion 111 having heat insulation as a partition. The heat insulating material of the second partition part is composed of a vacuum heat insulating material 127 and expanded polystyrene 126, and foams the raw material of the expanded polystyrene 126 around the vacuum heat insulating material 127, and covers the vacuum heat insulating material 127 with the expanded polystyrene 126. The vacuum heat insulating material 127 and the expanded polystyrene 126 are integrated. A partition cover 135 that is a resin component that covers a heat insulating material such as polypropylene is disposed on the inner surface of the second partition portion.

  Here, the integral foaming process of the vacuum heat insulating material 127 and the expanded polystyrene 126 will be described with reference to FIG. An acrylic or epoxy adhesive that can be bonded to the expanded polystyrene 126 is applied to the vacuum heat insulating material 127, and the raw material beads 131 of the expanded polystyrene 126 are pre-expanded. Next, a vacuum heat insulating material 127 in which pre-foamed raw material beads 131 are partially filled in an integrally foaming mold 132 and an adhesive is applied thereon is arranged, and further pre-foamed raw material beads 131 are filled thereon. To do. Thereafter, the mold 132 is closed and steam overheating is performed. When steam having a temperature of about 115 to 125 degrees Celsius enters from the inlet of the steam hole and exits from the outlet of the steam hole, the raw material beads 131 expand to produce a heat insulating material according to the mold surface.

  The vacuum heat insulating material 127 covers the core material 130 with the two outer cover materials 128 facing each other, the inside is decompressed to a vacuum, and the periphery is sealed by heat welding. In other words, the core material 130 is provided. Is covered with two outer covering materials 128 made of a laminate film and the inside of the outer covering material 128 is sealed under reduced pressure, and is not particularly different from a general vacuum heat insulating material.

  The core material 130 is not particularly specified as an inorganic fiber such as glass wool, glass fiber, alumina fiber, silica alumina fiber, silica fiber, rock wool, or silicon carbide fiber.

  The bag shape of the jacket material 128 includes a four-side seal bag, a gusset bag, a three-side seal bag, a pillow bag, a center tape seal bag, and the like, but is not particularly specified.

  Further, in order to further improve the initial heat insulation performance and the temporal heat insulation performance of the vacuum heat insulating material 127, it is also possible to use a getter material such as a gas adsorbent or a moisture adsorbent. The adsorption mechanism may be any of physical adsorption, chemical adsorption, occlusion, and sorption, but a substance that acts as a non-evaporable getter is good.

  Moreover, you may comprise the duct of the cool air ventilated in a store | warehouse | chamber inside a 2nd partition part.

  In the cooling chamber 109, a cooler 107 that generates fin-and-tube type cool air as a representative is vertically arranged on the back surface of the vegetable chamber 105 including the rear region of the second partition 111 that is a heat insulating partition wall. It is arranged vertically. The material of the cooler 107 is aluminum or copper.

  In the vicinity of the cooler 107 (for example, the upper space), cold air that blows the cold air generated by the cooler 107 to each of the refrigerator compartment 102, the ice making chamber 104, the switching chamber 103, the freezer compartment 106, and the vegetable compartment 105 by a forced convection method. A blower fan 108 is disposed, and a radiant heater (not shown) made of a glass tube as a defrosting device for defrosting the frost adhering to the cooler 107 and the cool air blower fan 108 during cooling is disposed in a lower space of the cooler 107. Is provided. The defroster is not particularly specified, and a pipe heater in close contact with the cooler 107 may be used in addition to the radiant heater.

  Although the cool air blowing fan 108 may be directly disposed in the inner box 116, it may be disposed in the second partition part assembled after foaming to reduce the manufacturing cost by performing block processing of the parts. it can.

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

  As in this embodiment, the refrigerator layout configuration in which the freezer compartment 106 is installed below, the refrigerator compartment 102 is arranged upward, and the vegetable compartment 105 is arranged in front of the cooling chamber 109 is often used from the viewpoint of usability. It has been. Moreover, the refrigerator of the structure which has arrange | positioned the compressor 117 in the back | inner part of the top | upper surface is also used from the point of view of usability and the improvement of storage capacity.

  Next, the cooling action of the refrigerator will be described.

  For example, when the freezer compartment 106 rises in temperature due to intrusion heat from outside air and door opening / closing, and the freezer compartment sensor (not shown) reaches the start temperature or higher, the compressor 117 is started and cooling is started. Is done. While the high-temperature and high-pressure refrigerant discharged from the compressor 117 finally reaches the dryer (not shown) disposed in the machine room 119, heat is dissipated particularly in the condenser (not shown) or the outer box 115. The pipe (not shown) is cooled and liquefied by heat exchange with the air outside the outer box 115 and the urethane heat insulating material 124 in the warehouse.

  Next, the liquefied refrigerant is depressurized by the capillary tube 118, flows into the cooler 107, and exchanges heat with the internal air around the cooler 107. The cold air that has undergone heat exchange is blown into the cabinet by a nearby cool air blower fan 108 to cool the inside of the cabinet. Thereafter, the refrigerant is heated and gasified, and returns to the compressor 117. When the inside of the refrigerator is cooled and the temperature of the freezer compartment sensor (not shown) becomes equal to or lower than the stop temperature, the operation of the compressor 117 is stopped.

  The cooler 107 is the coldest part of the refrigerator because the refrigerant flowing through the refrigeration cycle evaporates in synchronization with the operation of the compressor 117. The temperature is usually about −30 ° C. to −20 ° C., although it depends on conditions. In the case of ultra freezing, it may be −30 ° C. or lower. At this time, the vegetable room 105 which is the room in front of the cooling room 109 including the cooler 107 is often set at 2 ° C to 7 ° C, and the temperature difference between the cooler 107 and the vegetable room 105 is 22 ° C to 37 ° C. It also becomes. In this case, the surface of the second partition portion 111 that partitions the cooling chamber 109 is 0.7 ° C. when the cooler 107 is −25 ° C. and the vegetable chamber 105 is 5 ° C. when the heat insulating material is composed of only the expanded polystyrene 126. (When the thickness is 30 mm). Although the vegetable compartment 105 depends on the amount of vegetables stored, the humidity of about 85% is usually maintained. Therefore, since the dew point temperature at a temperature of 5 ° C. and a humidity of 80% is 1.8 ° C., the surface of the partition portion is condensed.

  (Table 1) is a list of surface temperatures of the heat insulating material at a cooler temperature of −25 ° C. and a vegetable room temperature of 5 ° C. when the heat insulating material is foamed polystyrene 126. In the case of the said conditions from Table 1, the heat insulation thickness of the polystyrene foam 126 required in order to obtain surface temperature more than a dew point temperature is 45 mm. However, by placing a vacuum heat insulating material in foamed polystyrene and integrally foaming, the heat insulation thickness necessary to obtain a dew point temperature or higher under the same conditions is as follows: If the thickness of the vacuum heat insulating material 127 is 5 mm, the thickness of the foamed polystyrene 126 is The minimum wall thickness can be determined from the dimensions of the raw material beads 131.

  Therefore, the heat insulating material of the 2nd partition part 111 which partitions off the inside of a humid chamber like the vegetable chamber 105, and the cooling chamber 109 arrange | positioned at the back in a store | warehouse | chamber is used as heat insulating materials, such as a polystyrene foam, and a vacuum heat insulating material 127. As a result of integrally foaming, the thermal conductivity is 0.008 to 0.0005 (W / mK), which is much better than the expanded polystyrene 126 having a thermal conductivity of about 0.046 (W / mK). Under the influence of the vacuum heat insulating material 127, heat conduction to the interior can be suppressed, the heat absorption amount and the conduction rate of the dew condensation prevention heater can be reduced, the power consumption can be reduced, and the heat insulating partition Since the rigidity of the single unit can be increased, the yield due to cracking or the like can be improved. In particular, parts such as the second partition portion 111 that partition the cooling chamber 109 from the interior are large in size and weight, and the cost of a single product is high, so the poor yield directly affects the manufacturing cost.

  Moreover, when it is set as the structure which contact | connects the arrangement | positioning of the vacuum heat insulating material 127 in the expanded polystyrene 126 at an end surface like FIG. 6, the 2nd partition part 111 is changed by changing the entrance and exit of a vapor | steam in the production | generation process of the expanded polystyrene 126. Since the wall thickness of the heat insulating material can be reduced, the internal capacity can be increased by about 5 L, for example. Furthermore, since the material cost to be used can be reduced, the material cost can be reduced and the number of production steps can be reduced.

  In addition, by arranging the vacuum heat insulating material 127 in the partition portion as the front surface position of the cold air blowing fan 108, the noise transmitted through the vacuum heat insulating material 127 is composed of a single composite material having higher rigidity than foamed polystyrene. Air vibration from the fan is attenuated by the vacuum heat insulating material 127, chatter due to resonance between the cold air blowing fan 108 and the heat insulating material itself can be reduced by a mass effect, and wind noise and vibration of the cold air blowing fan 108 can be reduced by a soundproof effect.

  The vacuum heat insulating material 127 is disposed on the cooler 107 side, and the defrosting heat of a radiant heater or the like can be transmitted to the upper portion of the cooler at the time of defrosting by the aluminum metal that is the outer cover material of the vacuum heat insulating material 127. It is possible to reduce the power consumption by frequently performing the heater energization time.

  Further, by adhering the vacuum heat insulating material 127 to the foamed polystyrene 126 on an adhesive surface (not shown), deterioration of the expanded polystyrene 126 due to water accumulation due to condensation or the like between the vacuum heat insulating material 127 and the expanded polystyrene 126, heat insulation. The effect that the performance fall as a material and the performance fall by the penetration | invasion of the water to the vacuum heat insulating material 127 can be suppressed is acquired.

  Further, the vacuum heat insulating material 127 is a vacuum heat insulating material that covers a plurality of cores with a laminate film having a gas barrier property and is vacuum-sealed in a plurality of independent spaces on the same plane, so that the optimum vacuum heat insulating material even in a complicated shape. Since 127 can be formed, the coverage of the vacuum heat insulating material 127 can be increased in the partition portion, the energization rate of the heater can be reduced, and the power consumption can be reduced.

  Among the configurations of the jacket material 128 made of a laminate film that covers the core material 130 of the vacuum heat insulating material 127, a configuration having at least a vapor deposition layer 129 and a polyacrylic acid resin layer adjacent to the vapor deposition layer 129, Thus, since the gas barrier property of the vacuum heat insulating material 127 can be improved, the deterioration of the vacuum heat insulating material 127 over time can be suppressed, and the heat insulating performance can be secured over a long period of time. The temperature of the steam at the time of producing the expanded polystyrene is about 115 to 125 ° C., and the temperature at the time of vapor deposition of the vacuum heat insulating material 127 is about 120 to 130 ° C. By setting it as the structure which has an acid system resin layer, temperature can be made into about 140-150 degreeC.

(Embodiment 2)
FIG. 7 shows a cross-sectional view of the heat insulating material according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  In FIG. 7, the vacuum heat insulating material 227 in the 2nd partition part 211 is arrange | positioned inside the warehouse in a partition part.

  Thereby, since the wall thickness of a heat insulating material can be made thin, the capacity | capacitance in a warehouse can be enlarged. The cooler often uses a fin-and-tube method, but the outer surface of the cooler 207 is arranged by placing the outer cover material 228 of the vacuum heat insulating material 227 in close contact with the partition cover 235, that is, close to the inside of the cabinet. Since the surface of the vacuum heat insulating material 227 can be prevented from being damaged by the fins, reliability due to the tearing of the vacuum heat insulating material 227 can be secured.

  The wind noise and vibration of the cool air blowing fan 108 are once attenuated while passing through the polystyrene foam 226 in the heat insulating material, and the sound is again insulated by the vacuum heat insulating material 227.

(Embodiment 3)
FIG. 8 shows a cross-sectional view of the heat insulating material according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  In FIG. 8, the vacuum heat insulating material 327 is disposed apart from the partition cover 335 in the second partition portion, that is, the vacuum heat insulating material 327 is disposed so as to be covered with the heat insulating material.

  Thereby, since the rigidity of the second partition part 311 can be increased, it is possible to improve the yield due to cracks or the like when the parts of the second partition part 311 are attached. Moreover, since the heat wraparound from the jacket material 328 around the vacuum heat insulating material 327 can be eliminated, the heat intrusion into the vegetable compartment 305 can be reduced, and the energization rate of the heater can be reduced. The amount of power can be reduced.

  In addition, since the vacuum heat insulating material 327 is covered with the expanded polystyrene 326, the performance deterioration due to the pinhole of the vacuum heat insulating material 327 can be suppressed.

(Embodiment 4)
FIG. 9 shows a side cross-sectional view of the refrigerator in the fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the same structure as background art.

  In FIG. 9, a cooling chamber 409 is provided on the back surface of the refrigerator main body 401 across the back surfaces of both the vegetable room 405 and the freezing room 406, and the cooling room 409 has a second partition portion having heat insulation as a partition. 411 separates the vegetable compartment 405 and the freezer compartment 406. The cooler 407 is also arranged vertically in the vertical direction across the back surfaces of both the vegetable room 405 and the freezing room 406.

  Thereby, the vacuum heat insulating material 427 arranged in the upper limit direction and having a creepage distance can reduce the cooling heat from the cooler 407 and the wraparound of the heat from the heater at the time of defrosting.

  As described above, in the refrigerator according to the present invention, the heat insulating material such as polystyrene foam and the vacuum heat insulating material are integrally foamed in the heat insulating material of the partition part that partitions the inside of the refrigerator and the cooling chamber arranged in the interior of the refrigerator. Things are used. As a result, the heat conduction of the cold can be suppressed, so the heat absorption amount and the conduction rate of the dew condensation prevention heater can be lowered, the power consumption can be reduced and the internal capacity can be increased. It can be applied to all refrigeration equipment with a partition.

The perspective view of the refrigerator explaining Embodiment 1 of this invention Side surface sectional drawing of the refrigerator explaining Embodiment 1 of this invention Sectional drawing of the vacuum heat insulating material used for the heat insulating material by Embodiment 1 of this invention Sectional drawing of the heat insulating material by Embodiment 1 of this invention Integrated foaming process diagram of vacuum heat insulating material and expanded polystyrene according to Embodiment 1 of the present invention Horizontal heat-insulating process diagram of vacuum heat insulating material and expanded polystyrene according to Embodiment 1 of the present invention Sectional drawing of the heat insulating material by Embodiment 2 of this invention Sectional drawing of the heat insulating material by Embodiment 3 of this invention Side surface sectional drawing of the refrigerator explaining Embodiment 4 of this invention Front view explaining a conventional refrigerator Side sectional view explaining a conventional refrigerator

Explanation of symbols

101,401 Refrigerator body 102 Refrigerated room 103 Switching room 104 Ice making room 105,305,405 Vegetable room 106,406 Freezer room 107,207,407 Cooler 108 Cold air fan 109,409 Cooling room 1111, 211, 311, 411 Two partitions 127, 227, 327, 427 Vacuum heat insulating material 128, 228, 328 Outer material 130 Core material

Claims (8)

  An interior, a cooling chamber disposed in a section of the interior and storing a cooler, and a heat insulating partition that partitions the interior and the cooling chamber, wherein the heat insulating material of the heat insulating partition is foamed polystyrene, etc. A refrigerator characterized by integrally foaming a heat insulating material and a vacuum heat insulating material.   The refrigerator according to claim 1, wherein the arrangement of the vacuum heat insulating material in the heat insulating partition is arranged close to the cooler side.   The refrigerator according to claim 1, wherein an arrangement of the vacuum heat insulating material in the heat insulating partition is arranged close to the inside of the cabinet.   The refrigerator according to claim 1, wherein the vacuum heat insulating material is disposed so as to be covered with the heat insulating material in the heat insulating partition.   The refrigerator according to any one of claims 1 to 4, wherein the vacuum heat insulating material has a metal foil covering material.   6. The vacuum heat insulating material according to claim 1, wherein the vacuum heat insulating material is a vacuum heat insulating material that covers a plurality of core members with a laminate film having gas barrier properties and is vacuum-sealed in a plurality of independent spaces on the same plane. The refrigerator according to one item.   The refrigerator according to any one of claims 1 to 6, wherein a gas barrier property is improved by a configuration of the vacuum heat insulating material such that a covering material has a polyacrylic acid resin layer.   The refrigerator according to any one of claims 1 to 7, wherein the heat-insulating partition portion is configured to partition a cooling chamber spanning at least two chambers.

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