JP6204650B2 - Refrigerator with ice making equipment - Google Patents

Refrigerator with ice making equipment Download PDF

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JP6204650B2
JP6204650B2 JP2012238912A JP2012238912A JP6204650B2 JP 6204650 B2 JP6204650 B2 JP 6204650B2 JP 2012238912 A JP2012238912 A JP 2012238912A JP 2012238912 A JP2012238912 A JP 2012238912A JP 6204650 B2 JP6204650 B2 JP 6204650B2
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water supply
ice making
supply pipe
refrigerator
water
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JP2014088991A (en
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敏行 白水
敏行 白水
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Description

本発明は製氷装置付冷蔵庫に関する。   The present invention relates to a refrigerator with an ice making device.

冷蔵庫が備える製氷装置は、製氷室内に配置した製氷皿に給水パイプで給水し、製氷室に吹き込まれた冷気で製氷皿内の水を凍らせるという構造が一般的に採用されている。この時、給水後の給水パイプに水が残留していると、その水が凍結し、次回の給水ができなくなってしまう。そのような事態を避けるため、凍結防止用ヒータを設ける、あるいは給水パイプからの残留水排除を図るといった工夫がなされている。   An ice making device provided in a refrigerator generally employs a structure in which water is supplied to an ice tray placed in an ice making chamber with a water supply pipe, and water in the ice tray is frozen by cold air blown into the ice making chamber. At this time, if water remains in the water supply pipe after the water supply, the water freezes and the next water supply cannot be performed. In order to avoid such a situation, a contrivance has been made to provide a freezing prevention heater or to eliminate residual water from the water supply pipe.

特許文献１には凍結防止用ヒータを用いる構造例が記載されている。この構造例では給水ホースとそれに組み合わせられる凍結防止用ヒータの両方を被覆する断熱材に真空断熱材を用いることにより、凍結防止用ヒータ及びコンプレッサーの消費電力を低減することとしている。   Patent Document 1 describes a structural example using a freeze prevention heater. In this structural example, a vacuum heat insulating material is used as a heat insulating material that covers both the water supply hose and the anti-freezing heater combined therewith, thereby reducing the power consumption of the anti-freezing heater and the compressor.

特許文献２には給水パイプからの残留水排除を図る構造例が記載されている。この構造例では給水後に給水パイプに残留した水を、一定時間ポンプを逆回転させることで給水タンクに回収する。その後、ポンプを一定時間停止させ給水パイプに残留した水を給水パイプの出口部に集結させる集結動作、ポンプを一定時間正回転させる水切り動作、ポンプを一定時間逆回転させる戻し動作の３動作を一サイクルとした残留水の水切り動作を行う。   Patent Document 2 describes a structural example for removing residual water from a water supply pipe. In this structural example, the water remaining in the water supply pipe after the water supply is recovered in the water supply tank by rotating the pump reversely for a certain time. Thereafter, the pump is stopped for a certain period of time, and the three actions of collecting the water remaining in the water supply pipe at the outlet of the water supply pipe, the draining operation for rotating the pump forward for a certain period of time, and the returning operation for rotating the pump reversely for a certain period of time. Drain the residual water as a cycle.

特開２０００−１２１２１８号公報JP 2000-121218 A 特開平１１−２０１６０３号公報JP-A-11-201603

給水パイプから製氷皿に注がれる水の勢いが良すぎると、水が飛び散る。飛び散った水が給水パイプの注ぎ口の周辺に付着して凍結したりすると、注ぎ口が氷で塞がれる危険性がある。また製氷皿の外に飛び散った水が貯氷ケース内の氷に付着すると、氷同士がくっついたり、氷の外見が悪くなるなどの弊害が生じる。   If the momentum of water poured from the water supply pipe into the ice tray is too good, the water will scatter. If the scattered water adheres to the periphery of the spout of the water supply pipe and freezes, there is a risk that the spout will be clogged with ice. Further, when water splashed outside the ice tray is attached to the ice in the ice storage case, there are problems such as the ice sticking to each other or the appearance of the ice becoming worse.

水の飛び散りは給水パイプから製氷皿に注がれる水の勢いを削ぐことで抑制可能である。水の勢いを削ぐには給水パイプの内径を小さくするというのも有効な手段である。しかしながらこのようにすると、給水後に給水パイプ先端に水が残りやすくなり、その残留水が凍結するという新たな問題が生じる。冷蔵庫内という低温環境下では水の粘性が高くなることから表面張力による水膜が形成されやすく、問題を深刻なものにする。   Splashing of water can be suppressed by scraping the momentum of water poured from the water supply pipe to the ice tray. In order to reduce the momentum of water, reducing the inner diameter of the water supply pipe is also an effective means. However, if it does in this way, after water supply, it will become easy to remain water at the tip of a water supply pipe, and the new problem that the residual water will freeze will arise. In a low-temperature environment such as a refrigerator, the viscosity of water is high, so that a water film is easily formed due to surface tension, which makes the problem serious.

給水パイプの凍結防止のために凍結防止用ヒータを設けることとし、凍結防止用ヒータの効力を最大限に発揮させようとすれば、給水パイプをアルミニウムのような熱伝導率の高い金属で形成し、凍結防止用ヒータの容量も大きくする必要がある。それはコストアップにつながり、消費電力量の増大も避けられない。   In order to prevent the freeze of the water supply pipe, an anti-freeze heater will be provided. To maximize the effectiveness of the anti-freeze heater, the water supply pipe is made of a metal with high thermal conductivity such as aluminum. Also, it is necessary to increase the capacity of the antifreezing heater. This leads to an increase in cost, and an increase in power consumption is inevitable.

内径を小さくした給水パイプの凍結防止策としては、特許文献２に記載された構成のように、積極的に給水パイプからの残留水排除を図るというやり方もある。しかしながらこのやり方は構成や制御の複雑化につながり、コストアップ要因となる。   As a measure for preventing freezing of the water supply pipe having a small inner diameter, there is a method of actively removing residual water from the water supply pipe as in the configuration described in Patent Document 2. However, this method leads to a complicated configuration and control, and increases costs.

本発明は上記の点に鑑みなされたものであり、凍結防止用ヒータやポンプによる水切り動作に全面的に頼ることなく給水パイプ凍結の弊害を軽減できる製氷装置を提供することを目的とする。   The present invention has been made in view of the above points, and an object thereof is to provide an ice making device capable of reducing the adverse effects of water supply pipe freezing without relying entirely on the draining operation by a freeze prevention heater or pump.

上記目的を達成するために本発明は、冷蔵庫内の製氷室に配置され、当該製氷室内に吹き込まれる冷気により製氷を行う製氷皿と、前記製氷皿に給水する給水パイプを含む製氷装置を備えた製氷装置付冷蔵庫において、前記給水パイプの注ぎ口は内径がそれ以外の部分の内径よりも大である拡径部とされていることを特徴としている。   In order to achieve the above object, the present invention includes an ice making tray that is disposed in an ice making chamber in a refrigerator and that makes ice by cold air blown into the ice making chamber, and an ice making device that includes a water supply pipe for supplying water to the ice making tray. In the refrigerator with an ice making device, the spout of the water supply pipe is characterized in that it has an enlarged diameter portion whose inner diameter is larger than the inner diameter of the other portions.

上記構成の製氷装置付冷蔵庫において、前記注ぎ口の内径はそれ以外の部分の内径に比べ３０％以上大であることが好ましい。   In the refrigerator with an ice making device configured as described above, the inner diameter of the spout is preferably 30% or more larger than the inner diameter of other portions.

上記構成の製氷装置付冷蔵庫において、前記注ぎ口の先端面は水平面に対し傾斜していることが好ましい。   In the refrigerator with an ice making device configured as described above, it is preferable that a tip end surface of the spout is inclined with respect to a horizontal plane.

上記構成の製氷装置付冷蔵庫において、前記給水パイプが金属製であり、その外面には前記注ぎ口を除外する形で凍結防止用ヒータが装着されていることが好ましい。   In the refrigerator with an ice making device configured as described above, it is preferable that the water supply pipe is made of metal, and a freezing prevention heater is attached to the outer surface of the water supply pipe so as to exclude the spout.

上記構成の製氷装置付冷蔵庫において、前記給水パイプが合成樹脂製であり、その外面には前記注ぎ口を包含する形で凍結防止用ヒータが装着されていることが好ましい。   In the refrigerator with an ice making device configured as described above, it is preferable that the water supply pipe is made of a synthetic resin, and an outer surface thereof is provided with a freezing prevention heater including the spout.

本発明によると、給水パイプの注ぎ口は内径がそれ以外の部分の内径よりも大である拡径部とされているため、製氷皿への給水速度が速くならず、製氷皿から水が飛び散るといった事態を避けることができる。また拡径された注ぎ口は残留水が表面張力で全面的に塞いだりしないので、残留水が凍結したとしても注ぎ口が氷で塞がれることはない。従って、凍結防止用ヒータがなくても、あるいは凍結防止用ヒータは存在するが通電不良で発熱しないという状況下でも、次回の給水を開始することができ、一旦給水が開始されれば氷は速やかに融けるから、給水不良に至ることがない。このため、凍結防止用ヒータを発熱量が小さく消費電力が少なくて済むタイプのものに置き換えたり、凍結防止用ヒータそのものを廃止するなど、低価格で省エネルギーの設計に導くことができ、製氷装置の信頼性も高めることができる。   According to the present invention, since the spout of the water supply pipe is an enlarged diameter portion whose inner diameter is larger than the inner diameter of the other portions, the water supply speed to the ice tray is not increased, and water splashes from the ice tray. Can be avoided. Moreover, since the residual water does not completely block the surface due to the surface tension, the spout is not blocked by ice even if the residual water is frozen. Therefore, even if there is no anti-freezing heater or there is a non-freezing heater but there is no heat generation due to poor energization, the next water supply can be started, and once the water supply is started, the ice quickly Since it melts into water, it does not lead to poor water supply. For this reason, the anti-freezing heater can be replaced with a type that generates less heat and consumes less power, or the anti-freezing heater itself can be abolished. Reliability can also be improved.

製氷装置付冷蔵庫の断面図である。It is sectional drawing of the refrigerator with an ice making apparatus. 本発明の一実施形態を示す給水パイプの側面図である。It is a side view of the water supply pipe which shows one Embodiment of this invention. 給水パイプを金属製とし、それに凍結防止用ヒータを装着した状態を示す側面図である。It is a side view which shows the state which made the water supply pipe metal, and attached the heater for anti-freezing to it. 給水パイプを合成樹脂製とし、それに凍結防止用ヒータを装着した状態を示す側面図である。It is a side view which shows the state which made the water supply pipe into the product made from synthetic resin, and equipped with the heater for anti-freezing to it.

図１に製氷装置付冷蔵庫の構成例を示す。図１において、左側が冷蔵庫１の正面側、右側が冷蔵庫１の背面側となる。   FIG. 1 shows a configuration example of a refrigerator with an ice making device. In FIG. 1, the left side is the front side of the refrigerator 1, and the right side is the back side of the refrigerator 1.

冷蔵庫１の筐体２の内部空間は水平な仕切壁３により上下に二分され、上方の空間が冷蔵室４、下方の空間が冷凍室５となっている。冷蔵室４の正面開口部は扉６で閉ざされ、冷凍室５の正面開口部は扉７で閉ざされる。   The internal space of the housing 2 of the refrigerator 1 is divided into two vertically by a horizontal partition wall 3, and the upper space is a refrigerator compartment 4 and the lower space is a freezer compartment 5. The front opening of the refrigerator compartment 4 is closed by the door 6, and the front opening of the freezer compartment 5 is closed by the door 7.

冷蔵室４の内部には上下３段にわたり棚８、９、１０が配置されている。冷凍室５の内部には上下３段にわたり引出式のケースが配置されている。最上段のケースは貯氷ケース１１、その下のケースは第１の冷凍食品用ケース１２、最下段のケースは第２の冷凍食品用ケース１３である。   Inside the refrigerator compartment 4, shelves 8, 9, and 10 are arranged over three levels. Inside the freezer compartment 5, a drawer-type case is arranged over three stages. The uppermost case is an ice storage case 11, the lower case is a first frozen food case 12, and the lowermost case is a second frozen food case 13.

冷凍室５の奥には仕切壁１４で仕切られた空間があり、ここに蒸発器１５が配置されている。図示しない圧縮機で圧縮され、図示しない凝縮器で放熱した冷媒が蒸発器１５の内部で蒸発することにより、蒸発器１５の表面温度が下がり、冷蔵室４及び冷凍室５を冷却するための冷気が生成される。冷気は冷気循環ファン１６により図示しないダクトに送り込まれ、ダクトを通じて冷蔵室４及び冷凍室５に所定量ずつが吹き込まれる。これにより冷蔵室４は冷蔵温度になり、冷凍室５は冷凍温度になる。蒸発器１５の下方には蒸発器１５に付着した霜を融かすための除霜用ヒータ１７が配置されている。   There is a space partitioned by a partition wall 14 in the back of the freezer compartment 5, and an evaporator 15 is disposed here. The refrigerant compressed by a compressor (not shown) and dissipated by a condenser (not shown) evaporates inside the evaporator 15, so that the surface temperature of the evaporator 15 is lowered and cold air for cooling the refrigerator compartment 4 and the freezer compartment 5 is cooled. Is generated. The cold air is sent into a duct (not shown) by the cold air circulation fan 16, and a predetermined amount is blown into the refrigerator compartment 4 and the freezer compartment 5 through the duct. Thereby, the refrigerator compartment 4 becomes refrigeration temperature, and the freezer compartment 5 becomes refrigeration temperature. Below the evaporator 15, a defrosting heater 17 for melting frost attached to the evaporator 15 is disposed.

貯氷ケース１１と冷凍室５の天井部との間には空間が存在し、この空間が製氷室１８となる。製氷室１８は冷凍室５の天井部から垂下する仕切壁１９により冷凍室５の正面開口部から隔離されている。   A space exists between the ice storage case 11 and the ceiling portion of the freezer compartment 5, and this space becomes the ice making chamber 18. The ice making chamber 18 is isolated from the front opening of the freezer compartment 5 by a partition wall 19 that hangs down from the ceiling of the freezer compartment 5.

冷蔵庫１の製氷装置２０は、製氷室１８の内部に配置される構成要素と、仕切壁３の上に配置される構成要素を合わせて構成される。製氷室１８の内部に配置される構成要素と仕切壁３の上に配置される構成要素は次の通りである。   The ice making device 20 of the refrigerator 1 is configured by combining the components arranged inside the ice making chamber 18 and the components arranged on the partition wall 3. The components arranged inside the ice making chamber 18 and the components arranged on the partition wall 3 are as follows.

製氷室１８の内部には製氷皿２１が配置される。製氷皿２１は低温でも弾性を失わない合成樹脂により成型され、断面台形の氷を製造する製氷セルを複数個備えている。製氷皿２１の下面には製氷セルの内部の温度を監視するサーミスタ２２が取り付けられている。   An ice tray 21 is disposed inside the ice making chamber 18. The ice tray 21 is formed of a synthetic resin that does not lose its elasticity even at low temperatures, and includes a plurality of ice making cells that produce trapezoidal ice. A thermistor 22 for monitoring the temperature inside the ice making cell is attached to the lower surface of the ice tray 21.

製氷皿２１は離氷装置２３により支持される。離氷装置２３は、製氷皿２１が固定される水平軸と、この水平軸を軸線まわりに回転させる減速機付モータにより構成される。製氷皿２１の内部で製氷が完了したことを、製氷セル内部の温度変化を通じてサーミスタ２２が検知すると、離氷装置２３が製氷皿２１を水平軸線まわりに回転させ、製氷皿２１の上下を反転させる。上下反転が終わりに近づくころ、製氷皿２１の中でも離氷装置２３のモータから遠い方の端が図示しないストッパに当たり、その一方で製氷皿２１の反対側の端はそのまま回転を続けるので、製氷皿２１がねじれ、製氷セルの内部の氷が製氷セルから分離して貯氷ケース１１に落下する。その後離氷装置２３は水平軸を逆回転させ、製氷皿２１の向きを元に戻す。   The ice tray 21 is supported by the ice removing device 23. The ice removing device 23 includes a horizontal shaft to which the ice tray 21 is fixed and a motor with a speed reducer that rotates the horizontal shaft around the axis. When the thermistor 22 detects that the ice making is completed inside the ice tray 21 through the temperature change inside the ice making cell, the ice removing device 23 rotates the ice tray 21 around the horizontal axis and reverses the top and bottom of the ice tray 21. . When the upside down is nearing the end, the end of the ice tray 21 far from the motor of the ice detaching device 23 hits a stopper (not shown), while the opposite end of the ice tray 21 continues to rotate. 21 is twisted, and the ice inside the ice making cell is separated from the ice making cell and falls into the ice storage case 11. Thereafter, the ice removing device 23 rotates the horizontal axis in the reverse direction to restore the orientation of the ice tray 21.

仕切壁３の上には給水タンク２４と給水ポンプ２５が配置される。給水タンク２４は製氷用の水を保持するものであり、冷蔵室４の底面板２６の上に載置される。給水ポンプ２５は給水タンク２４の内部の水を製氷皿２１に移すためのものであり、冷蔵室４の奥の仕切壁２７の裏側に配置されている。   A water supply tank 24 and a water supply pump 25 are disposed on the partition wall 3. The water supply tank 24 holds water for ice making and is placed on the bottom plate 26 of the refrigerator compartment 4. The water supply pump 25 is for transferring the water inside the water supply tank 24 to the ice tray 21 and is disposed on the back side of the partition wall 27 at the back of the refrigerator compartment 4.

給水タンク２４の内部の水が少なくなったときは冷蔵室４の正面開口部から給水タンク２４を引き出し、水を補充する。水を補充した給水タンク２４を冷蔵室４の奥に向けて押し込むと、ある位置に達した時点で給水タンク２４と給水ポンプ２５との接続が生じる。以後、給水ポンプ２５を運転することにより、製氷皿２１に対し給水が行われる。底面板２６の下には給水タンク２４の凍結防止ヒータ２８が配置されている。   When the water in the water supply tank 24 becomes low, the water supply tank 24 is pulled out from the front opening of the refrigerator compartment 4 and replenished with water. When the water supply tank 24 replenished with water is pushed toward the back of the refrigerator compartment 4, the water supply tank 24 and the water supply pump 25 are connected when reaching a certain position. Thereafter, the water supply pump 25 is operated to supply water to the ice tray 21. Under the bottom plate 26, an antifreezing heater 28 for the water supply tank 24 is disposed.

給水ポンプ２５が給水タンク２４から吸い上げて送り出す水は、仕切壁３を貫通する給水パイプ２９を通じて製氷皿２１に届けられる。給水パイプ２９の構造が本発明のポイントであり、以下それを本発明の第１実施形態として説明する。また給水パイプ２９に凍結防止用ヒータを組み合わせる構造を本発明の第２実施形態及び第３実施形態として説明する。   The water sucked up and sent out from the water supply tank 24 by the water supply pump 25 is delivered to the ice tray 21 through the water supply pipe 29 penetrating the partition wall 3. The structure of the water supply pipe 29 is the point of the present invention, which will be described below as the first embodiment of the present invention. A structure in which the water supply pipe 29 is combined with a freeze prevention heater will be described as a second embodiment and a third embodiment of the present invention.

＜第１実施形態＞
給水パイプ２９は、アルミニウムのような金属、または合成樹脂で形成することができる。給水パイプ２９の形状は図２に示す通りである。すなわち上端は給水ポンプ２５に接続する短い水平部分となっている。この水平部分は仕切壁３の高さまで下がる背面側の垂直部分に続く。背面側の垂直部分は、仕切壁３の内部を正面側に向かって降下する緩やかな傾斜部に続く。傾斜部の正面側の端には、仕切壁３の内部から製氷室１８の内部に突き出す短い正面側垂直部分が続く。この正面側垂直部分の下部が製氷皿２１に水を注ぐ注ぎ口３０となる。 <First Embodiment>
The water supply pipe 29 can be formed of a metal such as aluminum or a synthetic resin. The shape of the water supply pipe 29 is as shown in FIG. That is, the upper end is a short horizontal portion connected to the water supply pump 25. This horizontal portion continues to the vertical portion on the back side that falls to the height of the partition wall 3. The vertical portion on the back side continues to a gentle slope that descends toward the front side inside the partition wall 3. A short front-side vertical portion that protrudes from the inside of the partition wall 3 to the inside of the ice making chamber 18 continues at the front side end of the inclined portion. The lower part of the front vertical part is a spout 30 for pouring water into the ice tray 21.

注ぎ口３０は軸線を垂直にした円筒形で、高さは１０〜２０ｍｍとされる。注ぎ口３０は、給水パイプ２９の中で注ぎ口３０以外の部分よりも内径が大である拡径部とされている。   The spout 30 has a cylindrical shape whose axis is vertical, and has a height of 10 to 20 mm. The spout 30 is an enlarged diameter part having a larger inner diameter than the portion other than the spout 30 in the water supply pipe 29.

給水パイプ２９の注ぎ口３０が、内径がそれ以外の部分の内径よりも大である拡径部とされているため、製氷皿２１への給水速度が速くならず、製氷皿２１から水が飛び散るといった事態を避けることができる。また拡径された注ぎ口３０は残留水が表面張力で全面的に塞いだりしないので、残留水が凍結したとしても注ぎ口３０が氷で塞がれることはない。従って、凍結防止用ヒータがなくても、あるいは凍結防止用ヒータは存在するが通電不良で発熱しないという状況下でも、次回の給水を開始することができ、一旦給水が開始されれば氷は速やかに融けるから、給水不良に至ることがない。   Since the spout 30 of the water supply pipe 29 is an enlarged diameter portion whose inner diameter is larger than the inner diameter of other portions, the water supply speed to the ice tray 21 is not increased, and water splashes from the ice tray 21. Can be avoided. Further, since the remaining water is not completely blocked by the surface tension in the expanded spout 30, even if the remaining water is frozen, the spout 30 is not blocked by ice. Therefore, even if there is no anti-freezing heater or there is a non-freezing heater but there is no heat generation due to poor energization, the next water supply can be started, and once the water supply is started, the ice quickly Since it melts into water, it does not lead to poor water supply.

注ぎ口３０の内径は、表面張力による水の膜が注ぎ口３０を全面的に覆ってしまうという事態が発生しない値に設定する。通常用いられている給水パイプの内径よりも３０％以上大である内径とすることで（例えば内径１０ｍｍのパイプを内径１３ｍｍとか内径１６ｍｍといった値に拡径することで）この値を得ることができる。   The inner diameter of the spout 30 is set to a value that does not cause a situation in which a film of water due to surface tension completely covers the spout 30. This value can be obtained by setting the inner diameter to be 30% or more larger than the inner diameter of a commonly used water supply pipe (for example, by expanding a pipe having an inner diameter of 10 mm to a value such as an inner diameter of 13 mm or an inner diameter of 16 mm). .

図２に示す通り、注ぎ口３０の先端面は水平面に対し傾斜している。このようにすることにより注ぎ口３０の面積が増大し、水膜が一層張りにくくなる。また最も低くなった部分に水滴が集まるので、残留水の水切れ性も良くなる。これらが相まって、残留水が凍結するという事象を、注ぎ口３０の箇所では回避することができる。   As shown in FIG. 2, the tip surface of the spout 30 is inclined with respect to the horizontal plane. By doing so, the area of the spout 30 is increased and the water film is more difficult to stretch. Further, since water droplets collect at the lowest part, the water drainage of the residual water is improved. Together, these can avoid the phenomenon of residual water freezing at the spout 30 location.

第１実施形態において、注ぎ口３０の内径を十分に大きくすれば、第２実施形態と第３実施形態で説明しようとしている凍結防止用ヒータを廃止することができる。これにより、低価格で省エネルギーの設計に導くことができ、製氷装置２０の信頼性も高めることができる。   In the first embodiment, if the inner diameter of the spout 30 is sufficiently large, the antifreezing heater that is to be described in the second and third embodiments can be eliminated. Thereby, it can lead to an energy-saving design at a low price, and the reliability of the ice making device 20 can be enhanced.

＜第２実施形態＞
給水パイプ２９に凍結防止用ヒータを装着する構造を、本発明の第２実施形態として図３に示す。図３の給水パイプ２９は金属製、好ましくはアルミニウム製である。給水パイプ２９に装着される凍結防止用ヒータ３１は、アルミニウム箔にコードヒータを均一に溶着したシート状のものであって、それが給水パイプ２９の外面に巻かれる。給水パイプ２９の正面側垂直部分の中で注ぎ口３０を除外した部分と、傾斜部の大部分とを、凍結防止用ヒータ３１が覆う。 Second Embodiment
A structure in which a freeze prevention heater is attached to the water supply pipe 29 is shown in FIG. The water supply pipe 29 in FIG. 3 is made of metal, preferably aluminum. The anti-freezing heater 31 attached to the water supply pipe 29 is in the form of a sheet in which a cord heater is uniformly welded to an aluminum foil, and is wound around the outer surface of the water supply pipe 29. A portion 31 excluding the spout 30 in the front side vertical portion of the water supply pipe 29 and most of the inclined portion cover the antifreeze heater 31.

給水パイプ２９を熱伝導の良い金属製とすれば、注ぎ口３０の外側にまで凍結防止用ヒータ３１を巻いておかなくても凍結防止用ヒータ３１で発生する熱が注ぎ口３０に伝わるから、注ぎ口３０の凍結を心配する必要がない。このように注ぎ口３０の外側には凍結防止用ヒータ３１を巻かないこととしたことで、給水パイプ２９を材料価格の高い金属製としたことによるコストアップを、凍結防止用ヒータ３１の材料節減によるコストダウンで相殺することができる。   If the water supply pipe 29 is made of a metal having good heat conduction, the heat generated in the antifreeze heater 31 is transmitted to the spout 30 even if the antifreeze heater 31 is not wound around the outside of the spout 30. There is no need to worry about freezing of the spout 30. As described above, the anti-freezing heater 31 is not wound around the outside of the spout 30 so that the cost of the water supply pipe 29 made of metal having a high material price can be reduced. Can be offset by cost reduction.

＜第３実施形態＞
図４に示す第３実施形態も給水パイプ２９に凍結防止用ヒータを装着したものであるが、第２実施形態と次の点が異なっている。すなわち給水パイプ２９は合成樹脂製とされる。言うまでもなく合成樹脂は熱伝導が悪いので、図３の構造では凍結防止用ヒータ３１の熱が注ぎ口３０に伝わらない。そこで第３実施形態では、凍結防止用ヒータ３１が注ぎ口３０の外側にまで延長され、凍結防止用ヒータ３１が注ぎ口３０を直接加熱するようになっている。 <Third Embodiment>
The third embodiment shown in FIG. 4 is also a water supply pipe 29 provided with a freeze prevention heater, but differs from the second embodiment in the following points. That is, the water supply pipe 29 is made of synthetic resin. Needless to say, since the heat conduction of the synthetic resin is poor, the heat of the antifreezing heater 31 is not transmitted to the spout 30 in the structure of FIG. Therefore, in the third embodiment, the antifreezing heater 31 is extended to the outside of the spout 30 and the antifreezing heater 31 directly heats the spout 30.

凍結防止用ヒータ３１を、注ぎ口３０まで含めて給水パイプ２９を包む大きさとしたことにより、凍結防止用ヒータ３１の部品単価は上昇する。しかしながらそれは、給水パイプ２９を合成樹脂製としたことによる給水パイプ２９の部品単価低減で相殺される。   The unit price of the anti-freezing heater 31 increases because the anti-freezing heater 31 is sized to wrap the water supply pipe 29 including the spout 30. However, this is offset by a reduction in the unit price of the water supply pipe 29 due to the water supply pipe 29 being made of synthetic resin.

以上、本発明の実施形態につき説明したが、本発明の範囲はこれに限定されるものではなく、発明の主旨を逸脱しない範囲で種々の変更を加えて実施することができる。   Although the embodiments of the present invention have been described above, the scope of the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention.

本発明は製氷装置付冷蔵庫に広く利用可能である。   The present invention is widely applicable to refrigerators with ice making devices.

１ 冷蔵庫
４ 冷蔵室
５ 冷凍室
１８ 製氷室
２０ 製氷装置
２１ 製氷皿
２４ 給水タンク
２５ 給水ポンプ
２９ 給水パイプ
３０ 注ぎ口
３１ 凍結防止用ヒータ DESCRIPTION OF SYMBOLS 1 Refrigerator 4 Refrigeration room 5 Freezing room 18 Ice making room 20 Ice making apparatus 21 Ice making tray 24 Water supply tank 25 Water supply pump 29 Water supply pipe 30 Spout 31 Heat-prevention heater

Claims (4)

冷蔵庫内の製氷室に配置され、当該製氷室内に吹き込まれる冷気により製氷を行う製氷皿と、前記製氷皿に給水する給水パイプを含む製氷装置を備えた製氷装置付冷蔵庫において、
前記給水パイプが垂直に延びた垂直部分の下端に注ぎ口を有して、前記注ぎ口の内径は前記注ぎ口の上方の前記垂直部分の内径よりも拡径された拡径部とされ、
前記拡径部の内径はそれ以外の部分の内径に比べ３０％〜６０％大であることを特徴とする製氷装置付冷蔵庫。 In an ice making device equipped with an ice making device including an ice making plate that is arranged in an ice making chamber in a refrigerator and that makes ice by cold air blown into the ice making chamber, and a water supply pipe that supplies water to the ice making plate,
The water supply pipe has a pouring spout at the lower end of a vertically extending vertical portion, and the inner diameter of the pouring spout is an enlarged portion that is larger than the inner diameter of the vertical portion above the pouring spout ,
The refrigerator with an ice making device is characterized in that an inner diameter of the enlarged diameter portion is 30% to 60% larger than an inner diameter of other portions . 前記注ぎ口の先端面は水平面に対し傾斜していることを特徴とする請求項１に記載の製氷装置付冷蔵庫。 The refrigerator with an ice making device according to claim 1, wherein a tip end surface of the spout is inclined with respect to a horizontal plane. 前記給水パイプが金属製であり、その外面には前記注ぎ口を除外する形で凍結防止用ヒータが装着されていることを特徴とする請求項１または２に記載の製氷装置付冷蔵庫。 The refrigerator with an ice making device according to claim 1 or 2 , wherein the water supply pipe is made of metal, and an anti-freezing heater is attached to an outer surface of the water supply pipe so as to exclude the spout. 前記給水パイプが合成樹脂製であり、その外面には前記注ぎ口を包含する形で凍結防止用ヒータが装着されていることを特徴とする請求項１または２に記載の製氷装置付冷蔵庫。 The refrigerator with an ice making device according to claim 1 or 2 , wherein the water supply pipe is made of a synthetic resin, and a freezing prevention heater is attached to an outer surface of the water supply pipe so as to include the spout.
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