JP4625794B2 - refrigerator - Google Patents
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- JP4625794B2 JP4625794B2 JP2006249029A JP2006249029A JP4625794B2 JP 4625794 B2 JP4625794 B2 JP 4625794B2 JP 2006249029 A JP2006249029 A JP 2006249029A JP 2006249029 A JP2006249029 A JP 2006249029A JP 4625794 B2 JP4625794 B2 JP 4625794B2
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Description
本発明は、冷凍貯蔵空間および冷蔵貯蔵空間を有し、これらをそれぞれ専用に冷却する冷却器と冷気循環ファンとを設けた冷蔵庫に関する。 The present invention relates to a refrigerator having a refrigerated storage space and a refrigerated storage space and provided with a cooler and a cold air circulation fan for cooling them exclusively.
近年の冷蔵庫は、例えば、本発明の出願人による出願である特願２００５−２３２６４３号に記載されているように、冷蔵室を最上部に配置し、その下部に製氷室と温度切替室とを併置し、さらにその下部に冷蔵室と同様の冷蔵貯蔵空間であり野菜類を収納する野菜室を設け、最下方に冷凍室を配置するタイプが多くなっており、本体中央部から下方に位置させた野菜室の背部には、冷蔵貯蔵空間を冷却する冷蔵用冷却器と冷凍貯蔵空間を冷却する冷凍用冷却器とを奥行き方向に対して前後に重なり合わせて配設することで、有効貯蔵容積の増大をはかっている。 In recent refrigerators, for example, as described in Japanese Patent Application No. 2005-232643 filed by the applicant of the present invention, a refrigerator compartment is arranged at the top, and an ice making room and a temperature switching room are provided at the bottom. There are many types in which a vegetable storage room for storing vegetables is provided in the lower part of the storage room, which is similar to the refrigeration room. On the back of the vegetable room, an effective storage volume is provided by overlapping a refrigeration cooler that cools the refrigerated storage space and a refrigeration cooler that cools the frozen storage space in the depth direction. Is increasing.
これら冷蔵用および冷凍用冷却器を交互に冷却する冷凍冷蔵の各冷却運転をおこなうことによって、冷蔵用および冷凍用冷却器には霜が付着するため、これを除霜する必要があり、冷凍用冷却器については、冷凍運転時間を積算することにより、所定の累積時間毎に除霜ヒータへの通電による除霜をおこない、冷蔵用冷却器の除霜は、冷蔵側冷却運転が終了して冷蔵用冷却器への冷媒供給を停止させた際に、冷蔵用のファンを回転して氷点以上の冷蔵室内空気を冷蔵用冷却器に導入し循環させることにより、冷蔵用冷却器に付着している霜を融解するようにしている。 By performing each cooling operation of refrigeration and refrigeration that alternately cools these refrigeration and refrigeration coolers, frost adheres to the refrigeration and refrigeration coolers. For the cooler, defrosting is performed by energizing the defrosting heater every predetermined cumulative time by accumulating the refrigeration operation time, and the defrosting of the refrigeration cooler is performed after the refrigeration side cooling operation is completed. When the supply of refrigerant to the refrigeration cooler is stopped, the refrigeration fan rotates to introduce the refrigeration room air above the freezing point into the refrigeration cooler and circulate it, thereby adhering to the refrigeration cooler. I try to thaw the frost.
しかしながら、冷凍用および冷蔵用冷却器を前後方向に重なり合うように近接させて配置させた構成では、前記のように冷蔵側の冷却運転終了時にファンにより冷蔵室内空気を循環しても、このときには冷凍側の冷却運転が開始されていることから、断熱板を介在させていても、冷蔵用冷却器がより低温の冷凍用冷却器によって冷却されてしまいその除霜が不完全な状態で終了する場合が生じ、除霜が未完了のまま冷蔵用の冷却運転に移行し継続すると、冷蔵用冷却器に付着した霜によって冷却力が阻害されるのみならず、残氷が成長して冷蔵貯蔵空間への冷却性能自体に重大な支障を生じることになる。 However, in the configuration in which the refrigeration and refrigeration coolers are arranged close to each other so as to overlap in the front-rear direction, the refrigeration room air is circulated by the fan at the end of the cooling operation on the refrigeration side as described above. When the cooling operation on the side is started, even if a heat insulating plate is interposed, the refrigeration cooler is cooled by a cooler for lower temperature and the defrosting is finished in an incomplete state If defrosting has not been completed and the system is shifted to the refrigeration cooling operation and continues, the frost adhering to the refrigeration cooler not only impedes the cooling power, but the remaining ice grows into the refrigerated storage space. The cooling performance itself will be seriously hindered.
これを防止するため、従来は、図５に示すように、冷凍用冷却器と断熱板（57）を介して設けた冷蔵用冷却器（53）の野菜室（48）側の冷蔵室から冷蔵用冷却器（53）への戻り冷気通路（66）側にヒーター（63）を設けて冷蔵用冷却器（53）の冷却運転終了とともにヒーター（63）に通電し、ヒーター加熱によって冷蔵用冷却器（53）の除霜を完了させるようにしていたが、冷蔵用冷却器（53）の前方にヒーター（63）を配置すると、その分、前カバー（58）と野菜容器（65）との間に形成される戻り冷気通路（66）の間隔（Ａ′）が狭くなることから圧力損失が増大して風量が低下し、冷却性能に悪影響をおよぼす問題があった。 In order to prevent this, conventionally, as shown in FIG. 5, refrigeration from the refrigerator compartment on the vegetable compartment (48) side of the refrigerator refrigerator (53) provided via the refrigerator for cooling and the heat insulating plate (57). The heater (63) is installed on the cold air passage (66) side to the cooler for cooling (53) and the heater (63) is energized at the end of the cooling operation of the refrigerator for cooling (53). The defrosting of (53) was completed, but when the heater (63) was placed in front of the refrigeration cooler (53), the space between the front cover (58) and the vegetable container (65) Since the interval (A ′) between the return cold air passages (66) formed in the above is narrowed, the pressure loss is increased, the air volume is lowered, and the cooling performance is adversely affected.
本発明は上記の事情を考慮してなされたものであり、冷蔵用および冷凍用冷却器を、貯蔵空間の背部に前後方向に重なり合うように配置することで貯蔵空間のトータル容積を増大させるとともに、冷蔵用冷却器の除霜を効率的に、且つ迅速におこない、さらに戻り冷気通路のスペースを確保して圧力損失を招くことなく円滑な冷気循環を補償することができる冷蔵庫を提供することを目的とするものである。 The present invention has been made in consideration of the above circumstances, and by increasing the total volume of the storage space by arranging the refrigeration and refrigeration coolers to overlap the back of the storage space in the front-rear direction, An object of the present invention is to provide a refrigerator capable of efficiently and quickly defrosting a refrigerator for refrigeration and further ensuring a space for a return cold air passage to compensate for a smooth cold air circulation without causing a pressure loss. It is what.
上記課題を解決するために本発明は、冷蔵貯蔵空間および冷凍貯蔵空間をそれぞれ専用に冷却する冷蔵用および冷凍用冷却器と、各冷却空間に冷気を循環する冷蔵用および冷凍用ファンとを設けた冷蔵庫において、冷蔵貯蔵空間における引き出し式野菜室の背部には、冷蔵用冷却器を前方にして、前記冷蔵用および冷凍用冷却器を断熱体を介して少なくともその一部が前後方向に重なり合うように近接させて配置し、前記断熱体の冷蔵用冷却器側に、冷蔵用冷却器部分を加熱する除霜ヒーターを配設してなり、さらに前記冷蔵用冷却器の前面を、合成樹脂製の保護シートと前カバーとがエアシール材を介して積層されて両者間に空気層が形成されているカバー体で覆い、このカバー体と野菜室内に設置した野菜容器の背壁との間に冷蔵用ファンからの冷気循環路を形成してなることを特徴とするものである。
In order to solve the above problems, the present invention is provided with a refrigeration and refrigeration cooler for cooling the refrigeration storage space and the refrigeration storage space, respectively, and a refrigeration and refrigeration fan for circulating cold air in each cooling space. In the refrigerator, in the back of the drawer-type vegetable room in the refrigerated storage space , the refrigeration cooler is forward, and the refrigeration and freezing coolers are overlapped in the front-rear direction through a heat insulator. The defrost heater for heating the refrigeration cooler part is disposed on the refrigeration cooler side of the heat insulator , and the front surface of the refrigeration cooler is made of a synthetic resin. Covering with a cover body in which a protective sheet and a front cover are laminated via an air sealant and an air layer is formed between them, for refrigeration between this cover body and the back wall of the vegetable container installed in the vegetable compartment Fah That by forming a cool air circulation path from it is characterized in.
本発明によれば、貯蔵空間の容積効率を増大するとともに、前後併置による冷凍用冷却器から冷蔵用冷却器への熱的影響を抑制して、その除霜作用を円滑に、且つ確実におこなうことができ、さらに冷蔵用冷却器の前方における冷気通路スペースを確保して円滑な冷気循環をおこなうことができる。 According to the present invention, the volumetric efficiency of the storage space is increased, and the thermal influence from the front-rear refrigeration cooler to the refrigeration cooler is suppressed to smoothly and reliably perform the defrosting action. In addition, it is possible to ensure a cool air passage space in front of the refrigeration cooler and perform smooth cool air circulation.
以下、図面に基づき本発明の１実施形態について説明する。図１は冷蔵庫の縦断面図、図２はその正面図であり、外箱（２）と内箱（３）、およびこれら内外箱間の空間部に充填された断熱材（４）からなる断熱箱体で形成された冷蔵庫本体（１）の内部を貯蔵空間として最上部に冷蔵室（５）、その下方に比較的小容積の自動製氷機を備えた製氷室（６）と温度切替室（７）を併設し、これらの下方には野菜室（８）、さらに最下方には冷凍室（９）をそれぞれ独立して配置している。前記各貯蔵室間は断熱仕切壁（10）で区分されており、各貯蔵室の前面開口には各々専用の扉を設けて開閉自在に閉塞している。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a refrigerator, and FIG. 2 is a front view thereof. The heat insulation is composed of an outer box (2) and an inner box (3), and a heat insulating material (4) filled in a space between the inner and outer boxes. The refrigerator main body (1) formed of a box is used as a storage space, with the refrigerator compartment (5) at the top and an ice making chamber (6) with a relatively small-volume automatic ice maker below it and a temperature switching chamber ( 7), a vegetable room (8) is arranged below them, and a freezer room (9) is arranged below them. Each of the storage chambers is divided by a heat insulating partition wall (10), and a dedicated door is provided at the front opening of each storage chamber so as to be freely opened and closed.
前記冷蔵室（５）は、最も収納容積が大きく使用頻度も高いため、前面開口部の両側に設けたヒンジで観音開き式の扉を枢支することで開口部を回動自在に閉塞しており、下部に配置した冷蔵室（５）以外の前記製氷室（６）および温度切替室（７）、野菜室（８）、冷凍室（９）などの貯蔵室は、冷蔵室に比べ収納容積が小さいこと、およびその設置高さ位置による使い勝手面から、扉に固着した支持枠に保持した容器を室内壁面に設けたレール部材で前後に摺動させ、開扉動作とともに室外に引き出して容器の上面開口から食品を収納し取り出する引き出し扉方式としている。 Since the refrigerator compartment (5) has the largest storage capacity and is frequently used, the opening is pivotally closed by pivotally supporting a double door with hinges provided on both sides of the front opening. The storage rooms such as the ice making room (6) and the temperature switching room (7), the vegetable room (8), and the freezing room (9) other than the refrigerating room (5) arranged in the lower part of the storage room are smaller than the refrigerating room. Due to its small size and ease of use due to its installation height position, the container held on the support frame fixed to the door is slid back and forth with the rail member provided on the indoor wall surface, and is pulled out to the outside together with the opening operation, and the upper surface of the container The drawer door system is used to store and take out food from the opening.
図１の要部拡大図である図３にも示すように、本体中央部から下方に位置させた野菜室（８）の背部には、冷蔵室（５）や野菜室（８）の冷蔵貯蔵空間（11）を冷却する冷蔵用冷却器（13）と、前記製氷室（６）や温度切替室（７）、冷凍室（９）などの冷凍貯蔵空間（12）を冷却する冷凍用冷却器（14）とを、奥行き方向に対して前後に重なり合わせて設けるとともに左右にわずかにずらして配設している。 As shown in FIG. 3, which is an enlarged view of the main part of FIG. 1, the refrigerator compartment (5) and the vegetable compartment (8) are refrigerated and stored in the back of the vegetable compartment (8) located below the center of the main body. A refrigeration cooler (13) that cools the space (11), and a refrigeration cooler that cools the frozen storage space (12) such as the ice making chamber (6), the temperature switching chamber (7), the freezing chamber (9), etc. (14) is provided so as to overlap in the front-rear direction with respect to the depth direction and is slightly shifted left and right.
これら冷蔵用および冷凍用冷却器（13）（14）は、それぞれ蛇行状に形成した冷媒管に矩形状のフィンを嵌着して直方体としたものであって、圧縮機（24）や、特に図示しない凝縮器や冷媒流路の切替弁、絞り装置からなる冷凍サイクルの一環として、それぞれ冷凍あるいは冷蔵貯蔵空間（11）（12）冷却用として専用に配設されたものであり、各対応貯蔵空間温度との温度差を可能な限り小さくして冷却効率を高く保持し、省電力運転をおこなうものである。 These refrigeration and refrigeration coolers (13) and (14) are rectangular parallelepipeds in which rectangular fins are fitted to meandering refrigerant tubes, and include a compressor (24) and, in particular, As part of the refrigeration cycle consisting of a condenser, a refrigerant flow path switching valve, and a throttle device (not shown), each is dedicated to cooling or refrigerated storage space (11) (12) cooling, each corresponding storage The temperature difference from the space temperature is made as small as possible to keep the cooling efficiency high, and power saving operation is performed.
そして、冷蔵用冷却器（13）は−１３℃、冷凍用冷却器（14）は−３０℃近傍の低温度に冷却されることから、発泡スチロールなどの成形体で形成された断熱体（17）を介在し、前後に近接して併置させており、さらに、図３における冷蔵用冷却器（13）部分の概略を示す図４から理解されるように、前方の冷蔵用冷却器（13）の前面、すなわち野菜室（８）側は、厚さ１ｍｍ程度の合成樹脂シートからなる保護シート（19）で覆うとともに、その前面には冷蔵用冷却器（13）の前面外形に添って非連通性のひも状のエアシール材（20）を枠状、あるいは、保護シート（19）の上下縁に沿って幅方向に亙るように２本を貼り付けて配設し、さらにその前面を合成樹脂成形体の前カバー（18）で覆っている。したがって、前記前カバー（18）と保護シート（19）を前記エアシール材（20）を介して積層した構成により、前記前カバー（18）と保護シート（19）とのわずかな間隙には空気層（21）が形成されており、これが冷蔵用冷却器（13）の前面カバー体となる。このカバー体と野菜室（８）内に設置した引き出し式の野菜容器（25）の背壁との間に、冷蔵用ファン（15）からの冷気循環路（26）が形成される。
And since the refrigeration cooler (13) is cooled to -13 ° C. and the refrigeration cooler (14) is cooled to a low temperature around −30 ° C., a heat insulator (17) formed of a molded body such as polystyrene foam. As shown in FIG. 4 showing the outline of the refrigeration cooler (13) portion in FIG. 3, the front refrigeration cooler (13) The front side, that is, the vegetable compartment (8) side is covered with a protective sheet (19) made of a synthetic resin sheet having a thickness of about 1 mm, and the front side is not connected to the front shape of the refrigeration cooler (13). A string-shaped air seal material (20) is framed, or two are attached so as to lie in the width direction along the upper and lower edges of the protective sheet (19), and the front surface is a synthetic resin molding The front cover (18) is covered. Therefore, the front cover (18) and the protective sheet (19) are laminated via the air seal material (20), so that there is an air layer in a slight gap between the front cover (18) and the protective sheet (19). (21) is formed , and this is the front cover body of the refrigeration cooler (13). A cold air circulation path (26) from the refrigeration fan (15) is formed between the cover body and the back wall of the drawer-type vegetable container (25) installed in the vegetable compartment (8).
また、冷蔵用冷却器（13）に対向する前記断熱体（17）の表面には、冷蔵用冷却器（13）の表面積に対向して陥没させた、数ｍｍ程度の深さの凹部（22）を形成しており、この凹部（22）には冷蔵用冷却器（13）に接するように、冷蔵用冷却器（13）の除霜をおこなうアルミ箔にヒーター線を溶着させて一体化した板状のＲ除霜ヒーター（23）を配設している。 Further, the surface of the heat insulator (17) facing the refrigeration cooler (13) is recessed with a depth of about several millimeters (22) which is depressed facing the surface area of the refrigeration cooler (13). In this recess (22), the heater wire was welded and integrated with the aluminum foil for defrosting the refrigeration cooler (13) so as to be in contact with the refrigeration cooler (13). A plate-shaped R defrost heater (23) is provided.
そして、前記圧縮機（24）を駆動して冷凍サイクルを運転し、冷蔵用冷却器（13）および冷凍用冷却器（14）の近傍にそれぞれ配置されたファン（15）（16）の回転によって、高温側である冷蔵室（５）や野菜室（８）の冷蔵貯蔵空間（11）、および低温側である冷凍室（９）や製氷室（６）など冷凍貯蔵空間（12）の交互に各々を独立して所定温度に冷却制御している。 Then, the compressor (24) is driven to operate the refrigeration cycle, and the fans (15) and (16) respectively disposed in the vicinity of the refrigeration cooler (13) and the refrigeration cooler (14) are rotated. Refrigerated storage space (12) such as a refrigerated storage space (11) in the cold storage room (5) or vegetable room (8) on the high temperature side, and a freezing room (9) or ice making room (6) on the low temperature side Each of them is independently cooled to a predetermined temperature.
このとき、前述のように、冷蔵用冷却器（13）と冷凍用冷却器（14）とは、前後方向に重なり合うように近接させて配置させており、双方の間隙には断熱板（17）を介在させているが、前記断熱体（17）の厚み寸法を充分な断熱作用を得るまで厚くすることは奥行き寸法上の規制から困難であることから、冷凍側の冷却運転時には、より低温の冷凍用冷却器（14）からの熱伝導によって、冷蔵用冷却器（13）が冷却影響を受け易くなる。 At this time, as described above, the refrigeration cooler (13) and the refrigeration cooler (14) are arranged close to each other so as to overlap in the front-rear direction, and a heat insulating plate (17) is placed in the gap between them. However, since it is difficult to increase the thickness of the heat insulating body (17) until sufficient heat insulation is obtained, it is difficult to control the depth of the heat insulating body (17). The heat conduction from the refrigeration cooler (14) makes the refrigeration cooler (13) susceptible to cooling.
一方、冷凍あるいは冷蔵の各冷却運転をおこなうことによって、前記冷蔵用および冷凍用冷却器（13）（14）は、付着した霜を除霜する必要があり、冷凍用冷却器（14）については、冷凍運転時間を積算することにより、所定の累積時間毎に冷凍用冷却器（14）の外表面に配設したパイプヒーターからなるＦ除霜ヒータ（35）への通電による除霜をおこなっている。 On the other hand, by performing each cooling operation of refrigeration or refrigeration, the refrigeration and refrigeration coolers (13) and (14) need to defrost adhering frost, and for the refrigeration cooler (14), By integrating the refrigeration operation time, defrosting is performed by energizing the F defrosting heater (35) comprising a pipe heater disposed on the outer surface of the refrigeration cooler (14) every predetermined cumulative time. Yes.
冷蔵用冷却器（13）の除霜は、以下のとおりであって、冷蔵用冷却運転により、冷蔵室（５）および野菜室（８）が所定の低温度に達した際には冷蔵用冷却器（13）への冷媒供給が停止されるが、前記冷蔵用ファン（15）の運転は中程度の回転速度で所定時間継続させるものであり、この冷蔵用ファン（15）の駆動により、プラス温度の冷蔵室（５）内空気を冷蔵用冷却器（13）部に循環させて、付着した霜の融解を冷却器の表面側からおこなうものである。また、冷蔵用冷却器（13）の除霜とともに、融解した霜と熱交換して低温となり、且つ、加湿状態となった冷気を冷蔵室（５）に再び供給することで、冷蔵室内の温度上昇を抑制し、同時に室内を高湿度の雰囲気に保持する。 The defrosting of the refrigeration cooler (13) is as follows. When the refrigeration room (5) and the vegetable room (8) reach a predetermined low temperature by the refrigeration cooling operation, the refrigeration cooling is performed. Although the supply of the refrigerant to the cooler (13) is stopped, the operation of the refrigeration fan (15) is continued for a predetermined time at a medium rotational speed. The temperature inside the refrigerator compartment (5) is circulated to the refrigerator (13) for refrigeration, and the attached frost is melted from the surface side of the refrigerator. Moreover, with the defrosting of the refrigeration cooler (13), the temperature of the refrigeration chamber is re-supplied to the refrigeration chamber (5) by supplying cold air that has become a low temperature by exchanging heat with the melted frost and becoming humidified Suppresses the rise and at the same time keeps the room in a high humidity atmosphere.
前記冷蔵用ファン（15）の駆動による冷蔵用冷却器（13）の除霜動作が開始されて所定時間経過したとき、あるいは、特に図示しないが、除霜終了検知のために冷蔵用冷却器（13）の上方、すなわち風の流れの下流側における冷媒パイプに取り付けた温度センサーによって冷媒パイプの温度上昇を検出したときには、前記Ｒ除霜ヒーター（23）に通電し、これを発熱させることで当接している冷蔵用冷却器（13）に直接熱を与えることで霜の融解を促進する。 When the defrosting operation of the refrigeration cooler (13) by the driving of the refrigeration fan (15) is started and a predetermined time has elapsed, or although not particularly illustrated, the refrigeration cooler ( When an increase in the temperature of the refrigerant pipe is detected by a temperature sensor attached to the refrigerant pipe above 13), that is, downstream of the wind flow, the R defrosting heater (23) is energized to generate heat. Frost melting is promoted by directly applying heat to the refrigeration cooler (13) that is in contact.
そして、前記冷蔵用冷却器（13）の除霜運転の開始と同時に、冷媒流路の冷凍側への切り替えにより圧縮機（24）の運転を継続したままで冷凍用冷却器（14）が冷却され、冷蔵用冷却器（13）がその冷却の影響を受けることになるが、冷凍用冷却器（14）側にあって当接状態にある前記Ｒ除霜ヒーター（23）が発熱することによって、冷蔵用冷却器（13）への冷凍用冷却器（14）からの冷却影響を遮断するとともに、冷蔵用冷却器（13）に付着している霜を融解し、除霜を確実におこなうものである。すなわち、冷蔵用冷却器（13）の除霜運転をおこないながら同時に、冷凍用冷却器（14）の冷却運転をおこなうものである。 At the same time as the start of the defrosting operation of the refrigeration cooler (13), the refrigeration cooler (14) is cooled while the operation of the compressor (24) is continued by switching the refrigerant flow path to the refrigeration side. The refrigeration cooler (13) is affected by the cooling, but the R defrost heater (23) in contact with the refrigeration cooler (14) generates heat. In addition to blocking the cooling effect from the refrigeration cooler (14) on the refrigeration cooler (13), the frost adhering to the refrigeration cooler (13) is melted to ensure defrosting. It is. That is, the cooling operation of the refrigeration cooler (14) is performed simultaneously with the defrosting operation of the refrigeration cooler (13).
このとき冷蔵用ファン（15）の回転は低速で回転させることで冷蔵空間内への熱影響を抑制し、前記冷蔵用冷却器（13）上部の温度センサーにより冷蔵用冷却器（13）における霜が最終まで残る部分の温度を検出するようにしている。 At this time, the refrigeration fan (15) is rotated at a low speed to suppress the influence of heat into the refrigeration space, and the frost in the refrigeration cooler (13) is controlled by the temperature sensor above the refrigeration cooler (13). Detects the temperature of the remaining part until the end.
上記除霜運転により、前記温度センサーの温度が所定のプラス温度まで上昇した場合は、冷蔵用冷却器（13）全体の霜が融解したと見做して除霜が完了したと判定し、Ｒ除霜ヒーター（23）への通電を停止し冷蔵用ファン（15）の駆動も停止する。 When the temperature of the temperature sensor rises to a predetermined plus temperature by the defrosting operation, it is determined that the defrosting is completed by assuming that the entire frost in the refrigeration cooler (13) has melted, and R Energization of the defrosting heater (23) is stopped and the driving of the refrigeration fan (15) is also stopped.
なお、前記Ｒ除霜ヒーター（23）への通電は、前記のタイミングに限らず、冷蔵用冷却運転が停止した時点からスタートし、所定時間、あるいは所定の冷蔵用冷却器（13）温度に到達した時点で通電を停止するように制御してもよく、また、着霜量に応じて通電量あるいは通電の可否を選択するようにしてもよい。 The energization of the R defrost heater (23) is not limited to the above timing, but starts when the cooling operation for refrigeration is stopped, and reaches a predetermined time or a predetermined refrigeration cooler (13) temperature. It may be controlled to stop energization at the point of time, or the energization amount or energization availability may be selected according to the amount of frost formation.
しかして、上記構成によれば、従来に比して、冷蔵用冷却器（13）は冷凍用冷却器（14）側である前記断熱体（17）の凹部（22）に配置されたＲ除霜ヒーター（23）によって直接加熱されることからヒーター熱が野菜室（８）内に奪われることなく除霜効率を向上させることができ、また、冷却影響を受けて着霜や残氷が生じ易い冷凍用冷却器（14）側にＲ除霜ヒーター（23）が位置することから、凹部（22）の存在による断熱厚さの減少があっても、より効果的に霜を融解することができるものである。 Thus, according to the above configuration, the refrigeration cooler (13) is less than the conventional R cooler (17) disposed in the recess (22) of the heat insulator (17) on the refrigeration cooler (14) side. Since it is directly heated by the frost heater (23), the defrosting efficiency can be improved without the heat of the heater being taken into the vegetable room (8), and frost formation and residual ice are generated due to the cooling effect. Since the R defrost heater (23) is located on the refrigeration cooler (14) side, the frost can be more effectively thawed even if the heat insulation thickness is reduced due to the presence of the recess (22). It can be done.
さらに、Ｒ除霜ヒーター（23）は断熱体（17）の凹部（22）内に収納されていることからその分冷却器配設スペース部分における奥行き方向の厚み寸法を縮減でき、冷蔵用冷却器（13）の野菜容器（25）側には除霜ヒーターが存在しないことから、野菜室（８）内の有効収納容積を減少させることなく冷蔵用冷却器（13）の前カバー（18）と野菜容器（25）との間隔（Ａ）を確保することができる。これにより、循環する冷気の圧力損失を小さくして、矢印に示すように、冷蔵用冷却器（13）へスムーズに冷気を戻し、冷蔵空間における冷気循環効率を向上することができる。 Further, since the R defrost heater (23) is housed in the recess (22) of the heat insulator (17), the thickness dimension in the depth direction in the space where the cooler is disposed can be reduced accordingly. Since there is no defrosting heater on the vegetable container (25) side of (13), the front cover (18) of the refrigeration cooler (13) can be used without reducing the effective storage capacity in the vegetable room (8). An interval (A) with the vegetable container (25) can be secured. As a result, the pressure loss of the circulating cold air can be reduced, and the cold air can be smoothly returned to the refrigerating cooler (13) as shown by the arrow, and the cold air circulation efficiency in the refrigerating space can be improved.
また、冷蔵用冷却器（13）の野菜容器（25）側を覆う前カバー（18）には、保護シート（19）との間に前記空気層（21）が形成されているため、空気層（21）による断熱効果によって冷蔵用冷却器（13）温度が低下してもその伝熱冷却を遮断し、野菜室（８）内が過剰に冷却されることを防止することができる。 In addition, since the air layer (21) is formed between the front cover (18) covering the vegetable container (25) side of the refrigeration cooler (13) and the protective sheet (19), the air layer Even if the temperature of the refrigeration cooler (13) decreases due to the heat insulating effect of (21), the heat transfer cooling can be cut off and the inside of the vegetable compartment (8) can be prevented from being excessively cooled.
なお、前記実施例においては、Ｒ除霜ヒーター（23）を冷蔵用冷却器（13）の断熱体（17）側の全面に亙って配設したが、上記実施例構成においては、前記冷蔵用冷却器（13）と冷蔵用ファン（15）とは、互いにそれぞれの中心から偏った位置に設置されていることから、冷却器内を通過する冷気流の流量も偏ることになって霜の付着状態も偏るため、Ｒ除霜ヒーター（23）は、冷蔵用ファン（15）から離間した側に偏倚して配置したり、冷蔵用ファン（15）から遠い部分の発熱量がより大きくなるように配設してもよい。これによって、一部に除霜残りが発生することなく冷蔵用冷却器（13）全体を均一に除霜することができ、迅速に除霜を終了させることができる。 In the embodiment, the R defrost heater (23) is disposed over the entire surface of the heat insulator (17) side of the refrigeration cooler (13). However, in the configuration of the embodiment, the refrigeration is performed. Since the cooler (13) and the refrigeration fan (15) are installed at positions deviated from the center of each other, the flow rate of the cold air flowing through the cooler is also deviated. Since the adhesion state is also biased, the R defrost heater (23) is biased and arranged on the side away from the refrigeration fan (15), or the amount of heat generated in the part far from the refrigeration fan (15) is increased. You may arrange in. As a result, the entire refrigeration cooler (13) can be defrosted uniformly without any remaining defrosting, and the defrosting can be completed quickly.
また、上記実施形態においては、各貯蔵室のレイアウトを、最上部に冷蔵室（５）、次いで製氷室（６）と温度切替室（７）とを併置し、その下部に野菜室（８）、最下部に冷凍室（９）のように配置するとともに、野菜室（８）の背部に冷蔵用および冷凍用冷却器（13）（14）を配設したものについて説明したが、本発明の対象とする貯蔵室は野菜室に限るものではなく、冷蔵貯蔵空間を形成する貯蔵室の背部に冷蔵用および冷凍用冷却器を配設した冷蔵庫に適用できる。 Moreover, in the said embodiment, as for the layout of each storage room, the refrigerator compartment (5) is placed in the uppermost part, and then the ice making room (6) and the temperature switching room (7) are juxtaposed, and the vegetable room (8) is placed in the lower part. In addition, while the freezer compartment (9) is arranged at the bottom and the vegetable compartment (8) is provided with the refrigeration and freezer coolers (13) (14), the present invention has been described. The target storage room is not limited to the vegetable room, but can be applied to a refrigerator in which a refrigerator for refrigeration and a refrigerator for freezing is provided at the back of the storage room forming the refrigerated storage space.
１ 冷蔵庫本体
５ 冷蔵室
８ 野菜室
11 冷蔵貯蔵空間
12 冷凍貯蔵空間
13 冷蔵用冷却器
14 冷凍用冷却器
15、16 ファン
17 断熱板
18 前カバー
19 保護シート
20 エアシール材
21 空気層
22 凹部
23 Ｒ除霜ヒーター
25 野菜容器
1
11 Refrigerated storage space
12 Refrigerated storage space
13 Refrigerator
14 Refrigeration cooler
15, 16 fans
17 Insulation plate
18 Front cover
19 Protective sheet
20 Air seal material
21 Air layer
22 recess
23 R defrost heater
25 Vegetable container
Claims (3)
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| JP2006249029A JP4625794B2 (en) | 2006-09-14 | 2006-09-14 | refrigerator |
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| JP2008070042A JP2008070042A (en) | 2008-03-27 |
| JP4625794B2 true JP4625794B2 (en) | 2011-02-02 |
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| JP5393283B2 (en) * | 2009-06-18 | 2014-01-22 | 日立アプライアンス株式会社 | refrigerator |
| JP5386243B2 (en) * | 2009-06-18 | 2014-01-15 | 日立アプライアンス株式会社 | refrigerator |
| JP5215367B2 (en) * | 2010-10-04 | 2013-06-19 | 日立アプライアンス株式会社 | refrigerator |
| CN105605852B (en) * | 2014-10-31 | 2017-12-29 | 青岛海尔股份有限公司 | Refrigerator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6091173A (en) * | 1983-10-25 | 1985-05-22 | 松下冷機株式会社 | Cooling device |
| JP2002062034A (en) * | 2000-08-18 | 2002-02-28 | Toshiba Corp | Refrigerator |
| JP2003035481A (en) * | 2001-07-23 | 2003-02-07 | Hitachi Ltd | Refrigerator |
| JP2006138609A (en) * | 2004-11-15 | 2006-06-01 | Toshiba Corp | Refrigerator |
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2006
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6091173A (en) * | 1983-10-25 | 1985-05-22 | 松下冷機株式会社 | Cooling device |
| JP2002062034A (en) * | 2000-08-18 | 2002-02-28 | Toshiba Corp | Refrigerator |
| JP2003035481A (en) * | 2001-07-23 | 2003-02-07 | Hitachi Ltd | Refrigerator |
| JP2006138609A (en) * | 2004-11-15 | 2006-06-01 | Toshiba Corp | Refrigerator |
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