JP2008116126A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems that a recessed groove can secure its reliability only with the linear shape when the recessed groove is formed on a vacuum heat insulating material to dispose a radiation pipe on a housing side face, and the vacuum heat insulating material can not be attached to a folded position of the radiation pipe as a freezing compartment exists there, and a wall thickness of the freezing compartment must be increased, in the refrigerator provided with the freezing compartment having large temperature difference from the outside of refrigerator, on its upper or lower part, which causes reduction of inside capacity, increase of power consumption, and dew condensation as a refrigerator surface has a temperature lower than a dew-point temperature of the outside air. <P>SOLUTION: The radiation pipe 113 is turned back at a refrigerating temperature zone, and the vacuum heat insulating material 112 is attached to a freezing temperature zone, thus the intrusion of heat to the freezing temperature zone of large temperature difference from the outside air, can be reduced, the power consumption can be reduced, and the inside capacity can be increased as a cross-sectional wall of the refrigerator can be thinned. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、断熱箱体に真空断熱材を配設した冷蔵庫に関するものである。   The present invention relates to a refrigerator in which a vacuum heat insulating material is disposed in a heat insulating box.

近年、冷蔵庫の大容量化及び設置スペース縮小の需要が高まるにつれて、冷蔵庫断熱壁を薄肉化する、さらには、真空断熱材を配置挿入させ、断熱性能の向上を図っている冷蔵庫や、省エネのため放熱パイプの配設構造を変えて凝縮能力を向上し、冷凍サイクルの能力向上を図った冷蔵庫が発売されている（例えば、特許文献１、２参照）。   In recent years, as the demand for larger refrigerators and reduced installation space has increased, refrigerator insulation walls have become thinner, and vacuum insulation has been placed and inserted to improve insulation performance, and for energy savings. Refrigerators have been put on the market in which the heat dissipating pipe arrangement structure is changed to improve the condensing capacity and improve the refrigeration cycle capacity (for example, see Patent Documents 1 and 2).

以下、図面を参照にしながら上記従来の冷蔵庫を説明する。   Hereinafter, the conventional refrigerator will be described with reference to the drawings.

図８、図９には、特許文献１に記載されている冷蔵庫の正面図と側面断面図を示す。図８、図９において、１は冷蔵庫本体、２は冷蔵温度（＋５℃程）に維持される冷蔵室、５は野菜などの乾燥を嫌う食品を収納するための野菜室とし、６は凍結温度（−２０℃程）に冷却される上段冷凍室と下段冷凍室である。冷凍室の奥部は底壁１９が階段状に立ち上がる形状とされており、この底壁１９の後部外側には機械室１７が形成されている。この機械室１７内には冷却システムを構成する圧縮機１５と、蒸発皿（図示せず）及びコンデンサ（図示せず）が設置される。   In FIG. 8, FIG. 9, the front view and side sectional drawing of the refrigerator described in patent document 1 are shown. 8 and 9, 1 is a refrigerator body, 2 is a refrigeration room maintained at a refrigeration temperature (about + 5 ° C.), 5 is a vegetable room for storing foods such as vegetables that are not to be dried, and 6 is a freezing temperature. They are an upper freezer compartment and a lower freezer compartment cooled to about -20 ° C. The bottom of the freezer compartment is shaped so that the bottom wall 19 rises in a stepped manner, and a machine room 17 is formed outside the rear part of the bottom wall 19. In the machine room 17, a compressor 15 constituting a cooling system, an evaporating dish (not shown), and a condenser (not shown) are installed.

冷蔵庫本体１の側面には、真空断熱材１２が貼り付けてあり、真空断熱材１９は、ガスの透過を阻止する多層ラミネート構造のフィルムから成る外被袋、シリカ・パーライト等の微粉末もしくは無機繊維等からなる芯材により構成され、芯材を外被に封入した後、外被袋内のガス（空気）を排気し、真空状にしてヒートシールにより密封している。   A vacuum heat insulating material 12 is affixed to the side surface of the refrigerator main body 1, and the vacuum heat insulating material 19 is a jacket bag made of a film having a multi-layer laminate structure that blocks gas permeation, fine powder such as silica / pearlite, or inorganic powder. It is composed of a core material made of fiber or the like, and after the core material is sealed in the jacket, the gas (air) in the jacket bag is evacuated, vacuumed and sealed by heat sealing.

この真空断熱材１９の熱伝導率は、０．００８から０．０００５Ｗ／ｍ・Ｋと断熱性能が非常に優れているため、冷蔵庫本体１の壁厚を薄くしても、庫内に侵入してくる熱量を有効的に削減することが可能となる。通常、真空断熱材１９の形状は正方形あるいは長方形の板状体であるが、機械室１７部分の冷蔵庫本体１の形状に近似させることで、機械室１７の形状に関わらず断熱したい部分に効果的に貼り付けることができるようになるので、総じて断熱箱体の壁厚を薄くして冷蔵庫の設置スペースをより一層縮小し、さらに庫内容量を拡大し、また、冷却システムの消費電力の一層の削減を図ることが可能である。   The heat conductivity of the vacuum heat insulating material 19 is 0.008 to 0.0005 W / m · K, which is very excellent in heat insulation performance. It becomes possible to effectively reduce the amount of heat coming. Normally, the shape of the vacuum heat insulating material 19 is a square or rectangular plate, but by approximating the shape of the refrigerator main body 1 in the machine room 17 part, it is effective for the part to be insulated regardless of the shape of the machine room 17. As a whole, the wall thickness of the heat insulation box is reduced to further reduce the installation space of the refrigerator, further increase the internal capacity, and further increase the power consumption of the cooling system. Reduction is possible.

図１０には、特許文献２に記載されている冷蔵庫の正面から見た配管概略図を示す。図１０において、２０は冷蔵庫の背面、２１は冷蔵庫の左側面、２２は冷蔵庫の右側面であり、１３は冷蔵庫の本体に貼り付けてある放熱パイプである。１７は冷蔵庫本体の背面下部に配置され、圧縮機（図示せず）やコンデンサ（図示せず）を収納している機械室である。放熱パイプ１３は、冷蔵庫背面及び側面において連続したＵ字状に折り曲げられており、冷蔵庫本体を構成する鉄板の表面に配設して貼り付けられている。   In FIG. 10, the piping schematic seen from the front of the refrigerator described in patent document 2 is shown. In FIG. 10, 20 is the back of the refrigerator, 21 is the left side of the refrigerator, 22 is the right side of the refrigerator, and 13 is a heat radiating pipe attached to the main body of the refrigerator. Reference numeral 17 denotes a machine room which is arranged at the lower back of the refrigerator main body and houses a compressor (not shown) and a condenser (not shown). The heat radiating pipe 13 is bent into a continuous U shape on the back and side surfaces of the refrigerator, and is disposed and attached to the surface of an iron plate constituting the refrigerator body.

機械室１７より吐出された放熱パイプ１３を、背面や側面で冷蔵庫本体の上下方向で長く配設することで、放熱効果を向上することができ、冷凍サイクルの向上を図ることができるため、消費電力量の低減を行うことができる。また、十分な放熱パイプ１３の長さを確保し、機械室１７に配置してあるコンデンサ（図示せず）と同等の放熱能力を得ることでコンデンサを無くすことができコストダウンを図ることが可能である。
特開平１０−２０５９８８号公報 特開平７−１０３６３６号公報 Since the heat radiating pipe 13 discharged from the machine room 17 is disposed long in the vertical direction of the refrigerator main body on the back and side surfaces, the heat radiating effect can be improved and the refrigeration cycle can be improved. The amount of electric power can be reduced. Further, by securing a sufficient length of the heat radiating pipe 13 and obtaining a heat radiating ability equivalent to that of a capacitor (not shown) disposed in the machine room 17, the capacitor can be eliminated and the cost can be reduced. It is.
Japanese Patent Laid-Open No. 10-205988 Japanese Patent Laid-Open No. 7-103636

しかしながら、上記従来の構成では各々における効果はあるものの、近年の冷蔵庫の大容量化及び設置スペース縮小の需要や、省エネに対するニーズに対しては、不十分であった。というのも、冷蔵庫の大容量化を図るには冷蔵庫断熱壁を薄肉化することや、無効スペースを無くすことが有効である。そのため、冷蔵庫断熱壁の薄肉化には真空断熱材を挿入したり、無効スペースを無くすために機械室のコンデンサ（冷蔵庫下部に配置される）を冷蔵庫側面に貼り付けている放熱パイプで置き換える工夫がなされる。このとき、冷蔵庫本体背面及び側面に貼り付けている真空断熱材に凹状の溝を形成することで放熱パイプを配設していても貼り付けることができ断熱効果の向上と冷蔵庫断面壁の薄肉化を図ることができる。しかし、真空断熱材に形成する凹状の溝は直線形状でしか信頼性を保つことができず、冷蔵庫側面の上部や下部における放熱パイプの折り曲げ形状部には真空断熱材を貼り付けることができないという課題を有していた。そのため、冷蔵庫レイアウトにおいて、特に冷蔵庫の上部や下部に庫外との温度差の大きい冷凍室を配置する冷蔵庫のおいては真空断熱材を貼り付けることができず、壁厚を厚くしなければならないため庫内容量が小さくなるという課題を有していた。また、庫内容量確保のため壁厚を薄くすると箱体侵入熱量の増加となり、消費電力量が高くなったり、冷蔵庫表面が外気の露点温度以下となって結露するという課題を有していた。   However, although the above-described conventional configurations have the respective effects, they are insufficient for the recent demands for increasing the capacity of the refrigerator and reducing the installation space, and the needs 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, in order to reduce the thickness of the refrigerator heat insulation wall, vacuum heat insulating material can be inserted, or in order to eliminate the ineffective space, the machine room condenser (located at the bottom of the refrigerator) can be replaced with a heat radiating pipe attached to the side of the refrigerator. Made. At this time, by forming a concave groove in the vacuum heat insulating material pasted on the back and sides of the refrigerator body, it can be pasted even if a heat radiating pipe is provided, improving the heat insulation effect and thinning the refrigerator cross section wall Can be achieved. However, the concave groove formed in the vacuum heat insulating material can be kept reliable only in a linear shape, and the vacuum heat insulating material cannot be attached to the bent shape portion of the heat radiating pipe at the upper or lower side of the refrigerator side surface. Had problems. Therefore, in the refrigerator layout, especially in the refrigerator where a freezer room having a large temperature difference from the outside of the refrigerator is arranged at the upper or lower part of the refrigerator, the vacuum heat insulating material cannot be pasted, and the wall thickness must be increased. For this reason, there is a problem that the internal capacity becomes small. In addition, if the wall thickness is reduced to secure the internal capacity, the amount of heat entering the box increases, and there is a problem that the amount of power consumption increases and the surface of the refrigerator is condensed below the dew point temperature of the outside air.

本発明は、上記の課題を解決するもので、冷蔵庫断面壁を薄肉化できるため小スペースで大容量の冷蔵庫で、かつ省エネ性能の高い冷蔵庫を提供することを目的とする。   The present invention solves the above-described problems, and an object of the present invention is to provide a refrigerator having a small space and a large capacity, and having a high energy saving performance since the sectional wall of the refrigerator can be thinned.

上記従来の課題を解決するために、本発明の冷蔵庫は、複数の断熱区画で構成され、少なくとも冷蔵温度帯と冷凍温度帯からなる外箱と内箱と前記外箱と内箱間に充填される発泡断熱材とからなる箱体と、箱体の前記外箱に密着し前記外箱と密着する面に凹型溝が形成された真空断熱材と、前記外箱側面に折り返し配設され前記真空断熱材の前記凹型溝内に配置された冷凍サイクルの放熱パイプとを備えて、前記放熱パイプの折り返し部を前記冷蔵温度帯の区画となるように折り曲げ、前記冷凍温度帯の区画に前記真空断熱材を貼り付けたものである。   In order to solve the above-described conventional problems, the refrigerator of the present invention includes a plurality of heat insulating compartments, and is filled between an outer box and an inner box, and the outer box and the inner box, each having at least a refrigeration temperature zone and a freezing temperature zone. A box made of foam heat insulating material, a vacuum heat insulating material that is in close contact with the outer box of the box and has a concave groove formed on the surface that is in close contact with the outer box, and a vacuum that is folded on the side of the outer box. A refrigeration cycle heat dissipating pipe disposed in the concave groove of the heat insulating material, the folded portion of the heat dissipating pipe is bent so as to be a compartment of the refrigeration temperature zone, and the vacuum heat insulation is provided in the compartment of the refrigerating temperature zone The material is pasted.

これによって外気との温度差の大きい冷凍温度帯への侵入熱を低減し、消費電力量の低減を図ることができると共に、冷蔵庫断面壁を薄肉化できるため庫内容量を大きくすることができる。   As a result, heat entering the refrigeration temperature zone having a large temperature difference from the outside air can be reduced, the power consumption can be reduced, and the refrigerator sectional wall can be thinned, so that the internal capacity can be increased.

本発明の冷蔵庫は、外気との温度差の大きい冷凍温度体に真空断熱材を貼り付けることができ、大容量で省エネを図ることができる。   The refrigerator of the present invention can attach a vacuum heat insulating material to a refrigeration temperature body having a large temperature difference from the outside air, and can achieve energy saving with a large capacity.

請求項１に記載の冷蔵庫は、複数の断熱区画で構成され、少なくとも冷蔵温度帯と冷凍温度帯からなる外箱と内箱と前記外箱と内箱間に充填される発泡断熱材とからなる箱体と、箱体の前記外箱に密着し前記外箱と密着する面に凹型溝が形成された真空断熱材と、前記外箱側面に折り返し配設され前記真空断熱材の前記凹型溝内に配置された冷凍サイクルの放熱パイプとを備えて、前記放熱パイプの折り返し部を前記冷蔵温度帯の区画となるように折り曲げ、前記冷凍温度帯の区画に前記真空断熱材を貼り付けたものである。これにより、外気との温度差の大きい冷凍温度帯への侵入熱を低減し、省エネを図ることができると共に、冷蔵庫断面壁を薄肉化できるため庫内容量を大きくすることができる。   The refrigerator according to claim 1 is composed of a plurality of heat insulating compartments, and includes an outer box composed of at least a refrigeration temperature zone and a freezing temperature zone, an inner box, and a foam heat insulating material filled between the outer box and the inner box. A box body, a vacuum heat insulating material which is in close contact with the outer box of the box body and has a concave groove formed on a surface thereof which is in close contact with the outer box, and is folded and disposed on a side surface of the outer box to be inside the concave groove of the vacuum heat insulating material. A refrigeration cycle radiating pipe disposed in the refrigeration cycle, the folded portion of the radiating pipe is bent so as to be in the refrigeration temperature zone, and the vacuum heat insulating material is attached to the refrigeration temperature zone. is there. Thereby, the intrusion heat to the freezing temperature zone having a large temperature difference from the outside air can be reduced, energy saving can be achieved, and the refrigerator sectional wall can be thinned, so that the internal capacity can be increased.

請求項２に記載の冷蔵庫は、前記放熱パイプが、上下を前記冷凍温度帯で挟まれた冷蔵温度帯の区画で折り曲げられることで、外気との温度差の大きい冷凍温度帯への侵入熱を低減し、消費電力量の低減を図ることができる。   The refrigerator according to claim 2, wherein the heat radiating pipe is bent at a compartment of a refrigeration temperature zone sandwiched between the refrigeration temperature zones so that the heat entering the refrigeration temperature zone having a large temperature difference from the outside air is generated. It is possible to reduce power consumption.

請求項３に記載の冷蔵庫は、前記放熱パイプが、冷凍サイクルの冷却器を収容した冷却室の投影面を避けて配設されるものである。これにより、温度の高い冷媒が通過する放熱パイプと冷却器との熱交換を防止することができるため、放熱パイプ内での冷媒の急激な液化凝縮を防止することで冷却システムの信頼性の確保や非定常の音の発生を低減することができる。   In the refrigerator according to claim 3, the heat radiating pipe is disposed so as to avoid a projection surface of a cooling chamber containing a cooler of a refrigeration cycle. This prevents heat exchange between the heat radiating pipe through which the high-temperature refrigerant passes and the cooler, thus ensuring the reliability of the cooling system by preventing sudden liquefaction condensation of the refrigerant in the heat radiating pipe. And generation of unsteady sound can be reduced.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、この実施の形態によってこの発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

（実施の形態１）
図１は本発明の実施の形態１による冷蔵庫の斜視図である。図２は本発明の実施の形態１による冷蔵庫の側面断面図である。図３は本発明の実施の形態１による冷蔵庫の配管概略図である。図４は本発明の実施の形態１による冷蔵庫の図１のＡ−Ａ‘断面図である。 (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 schematic piping diagram of the refrigerator according to the first embodiment of the present invention. 4 is a cross-sectional view of the refrigerator according to Embodiment 1 of the present invention, taken along the line AA ′ of FIG.

図１から図３に示すように、冷蔵庫本体１０１は、前方に開口する金属製（例えば鉄板）の外箱１０９と硬質樹脂製（例えばＡＢＳ）の内箱１１０と、外箱１０９と内箱１１０の間に発泡充填されたウレタン断熱材１１１からなる断熱箱体で、この本体の上部に設けられた冷蔵室１０２と、冷蔵室の下に設けられて冷凍温度帯から冷蔵、野菜、チルド等の温度帯に切り替え可能な切替室１０３と、冷蔵室１０２の下で切替室１０３に並列に設けられた製氷室１０４と、本体下部に設けられた冷凍室１０６と、並列に設置された切替室１０３及び製氷室１０４と冷凍室１０６の間に設けられた野菜室１０５で構成されている。切替室１０３と製氷室１０４と野菜室１０５と冷凍室１０６の前面部は引き出し式の図示しない扉により開閉自由に閉塞されると共に、冷蔵室１０２の前面は、例えば観音開き式の図示しない扉により開閉自由に閉塞される。   As shown in FIGS. 1 to 3, the refrigerator main body 101 includes a metal (for example, iron plate) outer box 109 that opens forward, a hard resin (for example, ABS) inner box 110, an outer box 109, and an inner box 110. A heat insulating box made of urethane heat insulating material 111 filled with foam between the refrigerator compartment 102 provided in the upper part of the main body and the refrigerator compartment provided under the refrigerator compartment, such as refrigeration, 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.

冷蔵庫本体１０１の背面には冷却室があり、冷気を生成する冷却器１０７と、冷気を各室に供給する冷気送風ファン１０８とを有し、庫内の温度検知センサー（図示せず）とダンパ等（図示せず）により庫内温度が制御されている。また、冷却器１０７下方には除霜手段（図示せず）が設置されている。また、冷却器１０７の材質は、アルミや銅が用いられる。   There is a cooling chamber on the back of the refrigerator main body 101. The refrigerator main body 101 has a cooler 107 that generates cold air and a cold air blowing fan 108 that supplies the cold air to each chamber. Etc. (not shown), the internal temperature is controlled. A defrosting means (not shown) is installed below the cooler 107. The material of the cooler 107 is aluminum or copper.

冷蔵庫本体１０１は、本体天面奥部に配置された圧縮機１１５と、コンデンサ（図示せず）と、放熱用の放熱パイプ１１３と、キャピラリーチューブ１１６と、冷却器１０７とを順次環状に接続してなる冷凍サイクルに冷媒を封入し、冷却運転を行う。前記冷媒には近年、環境保護のために可燃性冷媒を用いることが多い。   The refrigerator main body 101 is formed by sequentially connecting a compressor 115, a condenser (not shown), a heat radiating pipe 113, a capillary tube 116, and a cooler 107, which are arranged at the back of the top of the main body, in an annular shape. The refrigerant is sealed in the refrigeration cycle and the cooling operation is performed. In recent years, a flammable refrigerant is often used as the refrigerant for environmental protection.

冷蔵庫本体１０１の背面及び側面には、放熱用の放熱パイプ１１３が配設されており、一本のパイプを折り曲げることで放熱長さを確保し、外箱１０９にアルミテープ等で固定し、貼り付けられている。放熱パイプ１１３は通常、冷蔵庫本体の外箱各表面に分割されて貼り付けてあり、機械室にて各面のパイプを溶接し、接続している。   A heat radiating pipe 113 is disposed on the back and side surfaces of the refrigerator main body 101. A heat radiating length is secured by bending one pipe, and is fixed to the outer box 109 with aluminum tape or the like. It is attached. The heat radiating pipe 113 is usually divided and attached to each surface of the outer box of the refrigerator main body, and pipes on each surface are welded and connected in the machine room.

図４のように、冷蔵庫側面には配設してある放熱パイプ１１３の直線部分に真空断熱材１１２が貼り付けてある。真空断熱材１１２には放熱パイプ埋め込み用溝１１３があり、たとえばＵ字断面形状で溝幅４．２ｍｍ、溝深さ４．０ｍｍとなる。この凹部溝１３１に放熱パイプ１１３、例えばパイプ外径４．０ｍｍが勘合挿入するように、真空断熱材１１２は外箱１０９に接着剤等で固定される。   As shown in FIG. 4, the vacuum heat insulating material 112 is affixed to the linear part of the heat radiating pipe 113 provided on the side of the refrigerator. The vacuum heat insulating material 112 has a groove 113 for embedding a heat radiating pipe. For example, the U-shaped cross section has a groove width of 4.2 mm and a groove depth of 4.0 mm. The vacuum heat insulating material 112 is fixed to the outer box 109 with an adhesive or the like so that the heat radiating pipe 113, for example, a pipe outer diameter of 4.0 mm is fitted and inserted into the concave groove 131.

放熱パイプ１１３は野菜室部分の冷蔵温度帯で折り曲げられており、最下段の冷凍温度帯部分は放熱パイプ１１３を配設していないので、被覆率が大きくできる真空断熱材を貼り付けている。また、冷蔵庫背面方向には、冷却室があるため放熱パイプ１１３は冷却室前面までの配設としている。   The heat radiating pipe 113 is bent in the refrigeration temperature zone of the vegetable compartment portion, and since the heat radiating pipe 113 is not provided in the lowermost freezing temperature zone portion, a vacuum heat insulating material capable of increasing the coverage is attached. Further, since there is a cooling chamber in the rear direction of the refrigerator, the heat radiating pipe 113 is arranged up to the front surface of the cooling chamber.

冷蔵室１０２は冷蔵保存のために凍らない温度を下限に通常１〜５℃で設定されている。野菜室１０５は冷蔵室１０２と同等もしくは若干高い温度設定の２℃〜７℃とすることが多い。低温にすれば葉野菜の鮮度を長期間維持することが可能である。冷凍室１０６は冷凍保存のために通常−２２から−１８℃で設定されているが、冷凍保存状態の向上のために、たとえば−３０から−２５℃の低温で設定されることもある。   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.

冷蔵室１０２や野菜室１０５は庫内をプラス温度で設定されるので、冷蔵温度帯を呼ばれる。また、冷凍室１０６や製氷室１０４は庫内をマイナス温度で設定されるので、冷凍温度帯を呼ばれる。   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.

次に冷蔵庫の冷却について説明する。例えば冷凍室１０６が外気からの侵入熱およびドア開閉などにより、庫内温度が上昇して冷凍室センサ（図示せず）が起動温度以上になった場合に、圧縮機１１５が起動し冷却が開始される。圧縮機１１５から吐出された高温高圧の冷媒は、最終的に機械室１１７に配置されたドライヤ（図示せず）まで到達する間、特に外箱１０９に設置される放熱パイプ１１３において、外箱１０９の外側の空気や庫内のウレタン断熱材１１１との熱交換により、冷却されて液化する。   Next, cooling 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 and closing, and the freezer compartment sensor (not shown) reaches the start temperature or higher, the compressor 115 is started and cooling is started. Is done. While the high-temperature and high-pressure refrigerant discharged from the compressor 115 finally reaches the dryer (not shown) disposed in the machine chamber 117, the outer casing 109 particularly in the heat radiating pipe 113 installed in the outer casing 109. It is cooled and liquefied by heat exchange with the air outside and the urethane heat insulating material 111 in the warehouse.

次に液化した冷媒はキャピラリーチューブ１１６で減圧されて、冷却器１０７に流入し冷却器１０７周辺の庫内空気と熱交換する。熱交換された冷気は、近傍の冷気送風ファン１０８により庫内に冷気が送風され庫内を冷却する。この後、冷媒は加熱されガス化して圧縮器１１５に戻る。庫内が冷却されて冷凍室センサ（図示せず）の温度が停止温度以下になった場合に圧縮機１１５の運転が停止する。   Next, the liquefied refrigerant is decompressed by the capillary tube 116, 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 115. 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 115 is stopped.

以上のように構成された冷蔵庫について、以下その動作、作用について説明する。   About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

本実施の形態のように、冷凍室１０５が下方に設置され、冷蔵室１０２が上方に設置された冷蔵庫のレイアウト構成が使い勝手の観点からよく用いられている。また、圧縮機を天面奥部に配設した構成の冷蔵庫も、使い勝手の観点と庫内容量向上の点から用いられる。しかしながら、この構成では、冷凍室１０６が下方に設置されているため、冷蔵庫本体側面に貼り付けている放熱パイプ１１３の折り曲げ位置は冷凍室部分になる。真空断熱材１１２の信頼性確保の理由から、放熱パイプ埋め込み用溝を直線以外の曲げ形状で作成することは困難であるため、放熱パイプの折り曲げ部近傍までしか真空断熱材を貼り付けることができなかった。そのため、外気との温度差の大きい冷凍室部分に真空断熱材を貼り付け被覆率を大きく取ることができないため、侵入熱を低減するため冷蔵庫断面壁を厚くしなければならず、庫内容量を低下させるという課題があった。そこで、冷蔵庫側面の放熱パイプ１１３の折り曲げ位置を冷蔵温度帯とすることで、本来、外気との温度差が大きく庫内への侵入熱量も大きい冷凍室１０６に真空断熱材１１２の被覆率を高くして貼り付けことができる。特に真空断熱材１１２は、従来のウレタン断熱材１１１に対し、約１０分の１程度の熱伝導率であるため、冷蔵庫内への侵入熱量が低減でき、省エネを行うことができる。また、冷蔵庫上下の放熱パイプ折り曲げ位置の間にある、直線部分に真空断熱材１１２を貼り付けることで、更に侵入熱量を低減でき、省エネを行うことができる。   As in the present embodiment, a refrigerator layout configuration in which the freezer compartment 105 is installed downward and the refrigerator compartment 102 is installed upward is often used from the viewpoint of ease of use. Moreover, the refrigerator of the structure which has arrange | positioned the compressor in the top | upper surface back part is also used from the point of a user-friendliness point and the point of the improvement of storage capacity. However, in this structure, since the freezer compartment 106 is installed below, the bending position of the heat radiating pipe 113 attached to the side surface of the refrigerator body is the freezer compartment. Because it is difficult to make the groove for embedding the heat radiating pipe in a bent shape other than a straight line for the reason of ensuring the reliability of the vacuum heat insulating material 112, the vacuum heat insulating material can be pasted only to the vicinity of the bent portion of the heat radiating pipe. There wasn't. For this reason, it is impossible to increase the coverage by attaching a vacuum heat insulating material to the freezer compartment where the temperature difference from the outside air is large. Therefore, the refrigerator cross-section wall must be thickened to reduce intrusion heat, and the internal capacity is reduced. There was a problem of lowering. Therefore, by setting the bending position of the heat radiating pipe 113 on the side of the refrigerator as a refrigeration temperature zone, the vacuum insulation material 112 has a high coverage rate in the freezer compartment 106 which originally has a large temperature difference from the outside air and a large amount of heat to enter the refrigerator. Can be pasted. In particular, since the vacuum heat insulating material 112 has a thermal conductivity of about one-tenth that of the conventional urethane heat insulating material 111, the amount of heat entering the refrigerator can be reduced and energy can be saved. Moreover, by sticking the vacuum heat insulating material 112 to the straight line portion between the radiating pipe bending positions at the top and bottom of the refrigerator, the amount of intrusion heat can be further reduced and energy can be saved.

また、最下段の冷凍室１０６に真空断熱材１１２を貼り付けるため、冷蔵庫全体の重心を低くすることができ、転倒防止を図ることができる。さらに冷凍室１０６の内箱底面の外側に真空断熱材１１２を貼り付けると更に冷凍室１０６の侵入熱の低減となり省エネを図ることができる。   Moreover, since the vacuum heat insulating material 112 is affixed to the lowermost freezer compartment 106, the center of gravity of the entire refrigerator can be lowered and fall prevention can be achieved. Furthermore, when the vacuum heat insulating material 112 is attached to the outside of the bottom of the inner box of the freezer compartment 106, the intrusion heat of the freezer compartment 106 is further reduced and energy saving can be achieved.

また、冷凍温度帯で挟まれた冷蔵温度帯で放熱パイプ１１３を折り曲げることで、冷蔵温度帯（本実施例では野菜室）の放熱パイプ１１３からの侵入熱量で庫内温度の低下を防止することができる。特に低外気においては冷蔵庫のレイアウト上、上下を冷凍温度帯に挟まれているため温度補償用のヒータ通電率が大きくなっていたが、容量および通電率を下げることでコストダウンを図ることができる。   Further, by bending the heat radiating pipe 113 in the refrigeration temperature zone sandwiched between the refrigeration temperature zones, it is possible to prevent a drop in the internal temperature due to the amount of intrusion heat from the heat radiating pipe 113 in the refrigeration temperature zone (the vegetable compartment in this embodiment). Can do. Especially in low outside air, the heater commutation rate for temperature compensation has been increased because the upper and lower sides are sandwiched between the refrigeration temperature zones due to the layout of the refrigerator, but the cost can be reduced by reducing the capacity and the energization rate. .

なお、放熱パイプ１１３の配設において、冷蔵庫背面の冷却室とかぶらないようにすることで、温度の高い冷媒が通過する放熱パイプ１１３と冷却器１０７との熱交換を防止することができるため、放熱パイプ内での冷媒の急激な液化凝縮を防止することで冷却システムの信頼性の確保や非定常な音の発生を低減することができる。特に真空断熱材を介さない部分については効果的である。   In addition, in the arrangement of the heat radiating pipe 113, heat exchange between the heat radiating pipe 113 through which the high-temperature refrigerant passes and the cooler 107 can be prevented by preventing the heat radiating pipe 113 from hanging over the cooling chamber on the back of the refrigerator. By preventing sudden liquefaction and condensation of the refrigerant in the heat radiating pipe, it is possible to ensure the reliability of the cooling system and reduce the occurrence of unsteady sound. This is particularly effective for portions that do not involve a vacuum heat insulating material.

なお、冷蔵温度帯の冷蔵庫背面に冷却室のある冷蔵庫の場合、箱体側面に配設された放熱パイプ１１３の折り曲げ位置を冷蔵庫背面の冷却室側に向かって斜めに上げ、放熱パイプ１１３が冷却器１０７を収容した冷却室の投影面にかぶらないように避けて配設することで、冷凍温度帯と冷却室の外気との温度差が大きい部分に真空断熱材１１２を例えば台形形状に貼り付けることができるため、庫内への熱侵入を低減でき、省エネを図ることができると共に、冷蔵庫断面壁を薄肉化できるため庫内容量を大きくすることができる。   In the case of a refrigerator having a cooling chamber on the back side of the refrigerator in the refrigerated temperature zone, the folding position of the heat radiating pipe 113 disposed on the side surface of the box is raised obliquely toward the cooling chamber side on the back of the refrigerator so that the heat radiating pipe 113 is cooled. The vacuum heat insulating material 112 is affixed in a trapezoidal shape, for example, to a portion where the temperature difference between the freezing temperature zone and the outside of the cooling chamber is large, by avoiding being placed on the projection surface of the cooling chamber containing the vessel 107 Therefore, the heat intrusion into the storage can be reduced, energy saving can be achieved, and the refrigerator sectional wall can be thinned, so that the storage capacity can be increased.

なお、側面の放熱パイプ１１２において、左右の放熱パイプを一本のパイプを曲げて天面部分を通過するように作成することで部品点数とパイプの溶接箇所を削減できる。   In the side heat radiating pipe 112, the number of parts and the number of welded parts of the pipe can be reduced by forming the right and left heat radiating pipes so that one pipe is bent and passes through the top surface portion.

なお、放熱パイプ１１２の配管内側に溝を付けることで放熱面積を上げることができる。   In addition, a heat radiation area can be raised by attaching a groove inside the piping of the heat radiation pipe 112.

なお、放熱パイプ１１３の折り曲げの間隔を小さく調節することで十分な放熱能力を確保でき、外付けのコンデンサを廃止することができ、材料のコストダウンや溶接箇所の低減による工数削減の効果を図ることができる。   In addition, by adjusting the bending interval of the heat radiating pipe 113 to be small, it is possible to secure a sufficient heat radiating capability, to eliminate the external capacitor, and to achieve the effects of reducing the cost of materials and reducing the number of welding points. be able to.

（実施の形態２）
図５は本発明の実施の形態２による冷蔵庫の斜視図である。図６は本発明の実施の形態２による冷蔵庫の側面断面図である。図７は本発明の実施の形態１による冷蔵庫の配管概略図である。 (Embodiment 2)
FIG. 5 is a perspective view of a refrigerator according to Embodiment 2 of the present invention. FIG. 6 is a side sectional view of a refrigerator according to Embodiment 2 of the present invention. FIG. 7 is a schematic piping diagram of the refrigerator according to Embodiment 1 of the present invention.

なお、実施の形態１と同一構成については、同一符号を付して詳細な説明を省略する。   In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

図５から図７に示すように、冷蔵庫本体２０１と、本体上部に設けられた冷凍室２０６と、本体下部に設けられた野菜室２０５と、冷凍室２０６と野菜室２０５の間に設けられた冷蔵室２０２とを備え、野菜室２０５の前面部は引き出し式の図示しない扉により開閉自由に閉塞されると共に、冷凍室２０６と冷蔵室２０２の前面は、回転式の図示しない扉により開閉自由に閉塞される。   As shown in FIGS. 5 to 7, the refrigerator main body 201, the freezer compartment 206 provided in the upper part of the main body, the vegetable compartment 205 provided in the lower part of the main body, and provided between the freezer compartment 206 and the vegetable compartment 205. The front portion of the vegetable compartment 205 is freely opened and closed by a drawer-type door (not shown), and the freezer compartment 206 and the front face of the refrigerator compartment 202 are freely opened and closed by a rotary door (not shown). Blocked.

本体下部の野菜室２０５は同じ冷蔵温度帯の冷蔵室２０２として使われても良い。   The vegetable room 205 at the bottom of the main body may be used as the refrigerating room 202 in the same refrigerating temperature zone.

また、冷凍室２０６の背面には冷却室２１８があり、冷気を生成する冷却器２０７と、冷気を各室へ送る冷気送風ファン２０８を備え、庫内の各部屋にダンパ（図示せず）等の温度制御手段によって冷気を供給して冷却している。   In addition, there is a cooling chamber 218 on the back of the freezing chamber 206, which includes a cooler 207 that generates cool air and a cool air blower fan 208 that sends the cool air to each chamber, and a damper (not shown) or the like in each room in the warehouse. Cooling air is supplied and cooled by the temperature control means.

冷蔵庫本体２０１の背面下部には圧縮機２１５が配置してあり、冷蔵庫本体下の凝縮器（図示せず）と、放熱用の放熱パイプ２１３と、キャピラリーチューブ２１６と、冷却器２０７とを順次環状に接続してなる冷凍サイクルに冷媒を封入し、冷却運転を行う。前記冷媒には近年、環境保護のために可燃性冷媒を用いることが多い。   A compressor 215 is disposed at the lower back of the refrigerator body 201, and a condenser (not shown) under the refrigerator body, a heat radiation pipe 213, a capillary tube 216, and a cooler 207 are sequentially annular. A refrigerant is sealed in a refrigeration cycle connected to the refrigeration cycle, and cooling operation is performed. In recent years, a flammable refrigerant is often used as the refrigerant for environmental protection.

側面に配設した放熱用の放熱パイプ２１３は、冷蔵室部分で折り曲げられており、本体上部の冷凍室部分には放熱パイプ２１３の折り返し部分が無いので、冷凍室部分に真空断熱材２１２を被覆率を上げて貼り付けることができる。さらに背面の冷却室２１８も覆うように貼り付けると、より効果的である。   The heat radiating pipe 213 disposed on the side surface is bent at the refrigerator compartment portion, and the freezer compartment portion at the upper part of the main body does not have the folded portion of the heat radiating pipe 213, so the freezer compartment portion is covered with the vacuum heat insulating material 212. Can be pasted at a higher rate. Furthermore, it is more effective if it is attached so as to cover the cooling chamber 218 on the back side.

また、冷蔵室２０２及び野菜室２０５部分に配設された放熱パイプ２１３においても直線部分に真空断熱材２１２を貼り付けることで、庫内への侵入熱量を低減でき、省エネを行うことができる。   Moreover, also in the heat radiating pipe 213 provided in the refrigerator compartment 202 and the vegetable compartment 205 part, by sticking the vacuum heat insulating material 212 to the straight part, the amount of intrusion heat into the cabinet can be reduced, and energy can be saved.

以上のように構成された冷蔵庫について、以下その動作、作用について説明する。   About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

本実施の形態のように、冷凍室２０６が本体上方に設置され、冷蔵室２０２が中央部および下方に設置された冷蔵庫のレイアウト構成は冷却効率の観点から、国内外において、よく用いられている。   As in the present embodiment, the layout configuration of the refrigerator in which the freezer compartment 206 is installed above the main body and the refrigerator compartment 202 is installed in the center and below is often used in Japan and abroad from the viewpoint of cooling efficiency. .

本実施の形態は、本体上方に冷凍室２０６を設置する冷蔵庫において、側面に配設された放熱パイプ２１３の折り曲げ位置を冷凍温度帯ではなく、冷蔵温度帯で行うことにより、外気との温度差が大きく、庫内への侵入熱量の大きい冷凍室全体に被覆率を大きく取った真空断熱材２１２を貼り付けることができ、消費電力量の低減を図ることができる。また、冷却負荷量を低減するので、運転時間自体も短くでき、コンプレッサーやファン騒音の低減を図ることができる。また、冷却中の放熱凝縮温度も低減できるため、冷蔵庫側面の表面温度も下げることができ、外気温の高い夏場等においても、やけどの心配はない。   In the present embodiment, in the refrigerator in which the freezer compartment 206 is installed above the main body, the temperature difference from the outside air is achieved by performing the bending position of the heat radiating pipe 213 disposed on the side surface in the refrigeration temperature zone instead of the refrigeration temperature zone. Therefore, the vacuum heat insulating material 212 having a large coverage can be attached to the entire freezing room having a large amount of heat entering the cabinet, and the power consumption can be reduced. Further, since the cooling load is reduced, the operation time itself can be shortened, and the compressor and fan noise can be reduced. In addition, since the heat radiation condensation temperature during cooling can be reduced, the surface temperature on the side of the refrigerator can also be lowered, and there is no risk of burns even in summer when the outside temperature is high.

なお、側面の放熱パイプ２１２において、左右の放熱パイプを一本のパイプで曲げて天面部分もしくは底面部分を通過するように作成することで部品点数とパイプの溶接箇所を削減できる。冷凍室２０６部分に放熱パイプ２１３が通過することになる場合は、放熱パイプの直線部分については、真空断熱材２１２に放熱パイプ埋め込み用溝を作ることで、冷凍室の侵入熱量を低減できる。   In the side heat radiating pipe 212, the left and right heat radiating pipes are bent with a single pipe so as to pass through the top surface portion or the bottom surface portion, thereby reducing the number of parts and the welding locations of the pipes. When the heat radiating pipe 213 passes through the freezer compartment 206, the heat intrusion into the freezer compartment can be reduced by forming a heat radiating pipe embedding groove in the vacuum heat insulating material 212 for the straight portion of the heat radiating pipe.

なお、放熱パイプ１１２の配管内側に溝を付けることで放熱面積を上げることができる。   In addition, a heat radiation area can be raised by attaching a groove inside the piping of the heat radiation pipe 112.

なお、放熱パイプ１１３の折り曲げの間隔を小さく調節することで十分な放熱能力を確保でき、外付けのコンデンサを廃止することができ、材料のコストダウンや溶接箇所の低減による工数削減の効果を図ることができる。   In addition, by adjusting the bending interval of the heat radiating pipe 113 to be small, it is possible to secure a sufficient heat radiating capability, to eliminate the external capacitor, and to achieve the effects of reducing the cost of materials and reducing the number of welding points. be able to.

なお、冷蔵庫上部の冷凍温度帯のほかにも別の冷凍温度帯があり、上下を冷凍温度帯に挟まれている場合に冷蔵温度帯で放熱パイプ２１３を折り曲げることで、放熱パイプ２１３からの侵入熱量によって、上下を冷凍温度帯に挟まれている冷蔵温度帯の庫内温度の低下を防止することができる。特に低外気においては冷蔵庫のレイアウト上、上下を冷凍温度帯に挟まれていると温度補償用のヒータ通電率が大きくなってしまうが、パイプからの熱量により、温度保証用ヒータの容量および通電率を下げることでコストダウンを図ることができる。   In addition to the freezing temperature zone at the top of the refrigerator, there is another freezing temperature zone. When the upper and lower sides are sandwiched between the freezing temperature zones, the heat radiation pipe 213 is bent in the refrigeration temperature zone, so that the heat penetration pipe 213 enters. Depending on the amount of heat, it is possible to prevent a drop in the internal temperature of the refrigeration temperature zone where the upper and lower sides are sandwiched between the freezing temperature zones. Especially in low outside air, if the upper and lower sides are sandwiched between refrigeration temperatures due to the refrigerator layout, the heater energization rate for temperature compensation will increase, but the capacity and energization rate of the temperature guarantee heater will depend on the amount of heat from the pipe. Lowering the cost can reduce costs.

以上のように、本発明にかかる冷蔵庫は、放熱パイプの折り返しを冷蔵温度帯で折り曲げ、冷凍温度帯に真空断熱材を貼り付けたものである。これにより、外気との温度差の大きい冷凍温度帯への侵入熱を低減し、省エネを図ることができると共に、冷蔵庫断面壁を薄肉化できるため庫内容量を大きくすることができるので、本体側面に放熱パイプを持ち、上方または下方に冷凍温度帯の部屋を持つ冷凍機器全般にも適用できる。   As described above, in the refrigerator according to the present invention, the return of the heat radiating pipe is bent in the refrigeration temperature zone, and the vacuum heat insulating material is attached to the refrigeration temperature zone. As a result, it is possible to reduce heat entering the refrigeration temperature zone where the temperature difference from the outside air is large, to save energy, and because the refrigerator cross-section wall can be thinned, the internal capacity can be increased. It can also be applied to all refrigeration equipment that has a heat radiating pipe and has a room in the refrigeration temperature zone above or below.

本発明の実施の形態１による冷蔵庫を説明する斜視図The perspective view explaining the refrigerator by Embodiment 1 of this invention 本発明の実施の形態１による冷蔵庫を説明する側面断面図Side surface sectional drawing explaining the refrigerator by Embodiment 1 of this invention 本発明の実施の形態１による冷蔵庫を説明する配管概略図Piping schematic diagram illustrating the refrigerator according to the first embodiment of the present invention. 本発明の実施の形態１による冷蔵庫を説明する図１のＡ−Ａ‘断面図1 is a cross-sectional view taken along the line A-A 'in FIG. 本発明の実施の形態２による冷蔵庫を説明する斜視図The perspective view explaining the refrigerator by Embodiment 2 of this invention 本発明の実施の形態２による冷蔵庫を説明する側面断面図Side surface sectional drawing explaining the refrigerator by Embodiment 2 of this invention 本発明の実施の形態２による冷蔵庫を説明する配管概略図Piping schematic diagram illustrating a refrigerator according to Embodiment 2 of the present invention 従来の冷蔵庫を説明する正面図Front view explaining a conventional refrigerator 従来の冷蔵庫を説明する側面断面図Side sectional view explaining a conventional refrigerator 従来の冷蔵庫を説明する配管概略図Piping schematic diagram explaining a conventional refrigerator

符号の説明Explanation of symbols

１０１，２０１ 冷蔵庫本体
１０２，２０２ 冷蔵室
１０３ 切換室
１０４ 製氷室
１０５，２０５ 野菜室
１０６，２０６ 冷凍室
１０７，２０７ 冷却器
１０８，２０８ 冷気送風ファン
１０９ 外箱
１１０ 内箱
１１１ ウレタン断熱材
１１２，２１２ 真空断熱材
１１３，２１３ 放熱パイプ
１１４ 放熱パイプ埋め込み用溝
１１５，２１５ 圧縮機 101, 201 Refrigerator body 102, 202 Refrigerated room 103 Switching room 104 Ice making room 105, 205 Vegetable room 106, 206 Freezer room 107, 207 Cooler 108, 208 Cold air fan 109 Outer box 110 Inner box 111 Urethane insulation 112, 212 Vacuum heat insulating material 113, 213 Heat radiation pipe 114 Heat radiation pipe embedding groove 115, 215 Compressor

Claims (3)

複数の断熱区画で構成され、少なくとも冷蔵温度帯と冷凍温度帯からなる外箱と内箱と前記外箱と内箱間に充填される発泡断熱材とからなる箱体と、箱体の前記外箱に密着し前記外箱と密着する面に凹型溝が形成された真空断熱材と、前記外箱側面に折り返し配設され前記真空断熱材の前記凹型溝内に配置された冷凍サイクルの放熱パイプとを備えて、前記放熱パイプの折り返し部を前記冷蔵温度帯の区画となるように折り曲げ、前記冷凍温度帯の区画に前記真空断熱材を貼り付けたことを特徴とする冷蔵庫。   A box composed of a plurality of heat insulation compartments, and comprising an outer box composed of at least a refrigeration temperature zone and a freezing temperature zone, an inner box, and a foam heat insulating material filled between the outer box and the inner box; A vacuum heat insulating material in which a concave groove is formed on a surface that is in close contact with the box and in close contact with the outer box, and a heat radiating pipe of a refrigeration cycle that is folded back on the side of the outer box and disposed in the concave groove of the vacuum heat insulating material. The folding part of the heat radiating pipe is bent so as to be a compartment of the refrigeration temperature zone, and the vacuum heat insulating material is attached to the compartment of the freezing temperature zone. 前記放熱パイプが、上下を前記冷凍温度帯で挟まれた冷蔵温度帯の区画で折り曲げられることを特徴とする請求項１に記載の冷蔵庫。   2. The refrigerator according to claim 1, wherein the heat radiating pipe is bent at a compartment of a refrigeration temperature zone in which the upper and lower sides are sandwiched between the refrigeration temperature zones. 前記放熱パイプが、冷凍サイクルの冷却器を収容した冷却室の投影面を避けて配設されることを特徴とする請求項１または２に記載の冷蔵庫。   The refrigerator according to claim 1 or 2, wherein the heat radiating pipe is disposed so as to avoid a projection surface of a cooling chamber containing a cooler of a refrigeration cycle.