JP6500803B2 - Hot water storage type hot water heater - Google Patents

Hot water storage type hot water heater Download PDF

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JP6500803B2
JP6500803B2 JP2016031042A JP2016031042A JP6500803B2 JP 6500803 B2 JP6500803 B2 JP 6500803B2 JP 2016031042 A JP2016031042 A JP 2016031042A JP 2016031042 A JP2016031042 A JP 2016031042A JP 6500803 B2 JP6500803 B2 JP 6500803B2
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heat insulating
insulating material
hot water
water storage
storage tank
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JP2017150681A (en
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悠介 佐藤
悠介 佐藤
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Mitsubishi Electric Corp
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Description

本発明は、貯湯式給湯機に関する。   TECHNICAL FIELD The present invention relates to a hot water storage type water heater.

貯湯タンクとこれを覆う断熱材とを備える貯湯式給湯機が広く用いられている（例えば、特許文献１参照）。特許文献２に開示された貯湯式給湯機は、以下のように構成されている。貯湯タンクの胴部を覆う胴部成形断熱材と、貯湯タンクの鏡板を覆う鏡板成形断熱材と、真空断熱材とを備える。鏡板成形断熱材は、胴部成形断熱材の外面に対して段差のない外面を有する。真空断熱材は、胴部成形断熱材と鏡板成形断熱材との境界部を覆う。   DESCRIPTION OF RELATED ART The hot water storage type hot-water heater provided with a hot water storage tank and the heat insulating material which covers this is used widely (for example, refer patent document 1). The hot water storage type water heater disclosed in Patent Document 2 is configured as follows. It comprises a body forming insulation covering the body of the hot water storage tank, a panel forming insulation covering the end plate of the hot water storage tank, and a vacuum insulation. The endplate-formed heat insulating material has an outer surface that is not stepped with respect to the outer surface of the body-formed heat insulating material. The vacuum heat insulating material covers the boundary between the body forming heat insulating material and the end plate forming heat insulating material.

特開２０１４−２１９１１０号公報JP 2014-219110 A 特開２０１５−１７５５３０号公報JP, 2015-175530, A

真空断熱材は、極めて低い熱伝導率を有するので、薄くても断熱性が高い。しかしながら、発泡プラスチックなどで任意の形状に成形できる成形断熱材に比べて、真空断熱材は、貯湯タンクに取り付ける作業が容易ではない。特許文献２に開示された貯湯式給湯機では、真空断熱材を厚さ方向の両側から成形断熱材で挟むことで真空断熱材を位置決めしている。   Vacuum insulators have very low thermal conductivity, so they are highly thermally insulating even if thin. However, the vacuum heat insulating material is not easy to attach to the hot water storage tank, as compared with a molded heat insulating material that can be formed into an arbitrary shape using foamed plastic or the like. In the hot water storage type water heater disclosed in Patent Document 2, the vacuum heat insulating material is positioned by sandwiching the vacuum heat insulating material from both sides in the thickness direction with the formed heat insulating material.

貯湯タンクの設置スペースを省スペースにすることが求められるため、貯湯タンクを覆う断熱材の厚さにも制限がある。成形断熱材で真空断熱材を位置決めする構成において、真空断熱材と重なる部分の成形断熱材の厚さを、真空断熱材の厚さの分だけ、薄くする場合がある。そのような場合に、薄くなったことで成形断熱材の強度が低下し、その部分が割れたりしやすい。   Since it is required to save space for the hot water storage tank, the thickness of the heat insulating material covering the hot water storage tank is also limited. In the configuration in which the vacuum heat insulating material is positioned by the formed heat insulating material, the thickness of the formed heat insulating material in the portion overlapping the vacuum heat insulating material may be reduced by the thickness of the vacuum heat insulating material. In such a case, the reduced thickness reduces the strength of the molded heat insulating material, and the portion thereof is likely to be broken.

本発明は、上述のような課題を解決するためになされたもので、断熱材の割れを確実に防止しつつ、複数の断熱材を省スペースに配置できる貯湯式給湯機を提供することを目的とする。   The present invention has been made to solve the problems as described above, and it is an object of the present invention to provide a hot water storage type hot water heater capable of arranging a plurality of heat insulating materials in a space saving while surely preventing the cracks of the heat insulating materials. I assume.

本発明に係る貯湯式給湯機は、外周面に凹部を有する貯湯タンクと、貯湯タンクを覆う第一断熱材と、第一断熱材の熱伝導率より高い熱伝導率を有し、第一断熱材より厚い第二断熱材と、を備え、第二断熱材は、第一断熱材が覆わない領域にて貯湯タンクを覆う本体部分と、凹部に挿入する挿入部と、第一断熱材の端部を位置決めする位置決め部と、を備え、貯湯タンクの軸方向の位置に関して、位置決め部は、少なくとも部分的に、挿入部と重なる位置にあるものである。   A hot water storage type water heater according to the present invention has a hot water storage tank having a recess on an outer peripheral surface, a first heat insulating material covering the hot water storage tank, and a thermal conductivity higher than the thermal conductivity of the first heat insulating material. The second heat insulating material is provided with a second heat insulating material thicker than the material, and the second heat insulating material is a main body portion covering the hot water storage tank in a region not covered by the first heat insulating material, an insertion portion inserted into the recess, and an end of the first heat insulating material A positioning portion for positioning the portion, wherein the positioning portion is at least partially in a position overlapping the insertion portion with respect to the axial position of the hot water storage tank.

本発明の貯湯式給湯機によれば、断熱材の割れを確実に防止しつつ、複数の断熱材を省スペースに配置することが可能となる。   According to the hot water storage type hot water supply machine of the present invention, it becomes possible to arrange a plurality of heat insulating materials in a space saving while surely preventing the cracks of the heat insulating materials.

実施の形態１の貯湯式給湯機の外観を示す斜視図である。FIG. 1 is a perspective view showing an appearance of a hot water storage type hot water supply apparatus of a first embodiment. 図１中のＡ−Ａ断面図（縦断面図）である。It is AA sectional drawing (longitudinal sectional view) in FIG. 貯湯タンク、第一断熱材、及び第二断熱材の部分的な断面図である。It is a partial sectional view of a hot water storage tank, the 1st heat insulating material, and the 2nd heat insulating material. 第一断熱材及び第二断熱材の部分的な断面図である。It is a partial sectional view of the 1st heat insulation material and the 2nd heat insulation material.

以下、図面を参照して実施の形態について説明する。各図において共通する要素には、同一の符号を付して、重複する説明を簡略化または省略する。   Hereinafter, embodiments will be described with reference to the drawings. Elements common to the respective drawings are denoted by the same reference numerals, and overlapping descriptions will be simplified or omitted.

実施の形態１．
図１は、実施の形態１の貯湯式給湯機の外観を示す斜視図である。図２は、図１中のＡ−Ａ断面図（縦断面図）である。図１に示すように、実施の形態１の貯湯式給湯機１は、略直方体形の箱状を呈する筐体１０を備える。筐体１０の底部には、複数の脚１１が接続される。貯湯式給湯機１は、これらの脚１１により、地面または台座に対して固定される。 Embodiment 1
FIG. 1 is a perspective view showing the appearance of the hot water storage type hot water supply apparatus according to the first embodiment. FIG. 2 is a cross-sectional view (longitudinal cross-sectional view) taken along line A-A in FIG. As shown in FIG. 1, the hot water storage type hot water supply device 1 according to the first embodiment includes a casing 10 having a substantially rectangular parallelepiped box shape. A plurality of legs 11 are connected to the bottom of the housing 10. The hot water storage type water heater 1 is fixed to the ground or a pedestal by these legs 11.

図２に示すように、筐体１０内には、貯湯タンク２が収容されている。貯湯タンク２は、例えばステンレス鋼のような金属材料で作られていてもよい。貯湯タンク２は、上鏡板２ａ、胴部２ｂ、及び下鏡板２ｃを備える。胴部２ｂの形状は、円筒状を呈する。上鏡板２ａは、胴部２ｂの上端を塞ぐ。上鏡板２ａの形状は、半球状、または逆さまにした椀状を呈する。上鏡板２ａと胴部２ｂとの間は、例えば溶接により接合されている。下鏡板２ｃは、胴部２ｂの下端を塞ぐ。下鏡板２ｃの形状は、半球状または椀状を呈する。下鏡板２ｃと胴部２ｂとの間は、例えば溶接により接合されている。   As shown in FIG. 2, the hot water storage tank 2 is accommodated in the housing 10. The hot water storage tank 2 may be made of a metal material such as stainless steel, for example. The hot water storage tank 2 includes an upper mirror plate 2a, a body 2b, and a lower mirror plate 2c. The shape of the body 2b is cylindrical. The upper mirror plate 2a closes the upper end of the body 2b. The shape of the upper mirror plate 2a is hemispherical or in the shape of a bowl upside down. The upper mirror plate 2a and the body 2b are joined, for example, by welding. The lower mirror plate 2c closes the lower end of the body 2b. The shape of the lower mirror plate 2c is hemispherical or bowl-like. The lower mirror plate 2c and the body 2b are joined, for example, by welding.

貯湯式給湯機１が使用されるときには、貯湯タンク２内は満水状態に維持される。貯湯タンク２内は、上側が高温の湯になり、下側が低温の水になる。上層の湯と、下層の水とは、比重差により、混じり合うことなく維持される。   When the hot water storage type water heater 1 is used, the inside of the hot water storage tank 2 is maintained in a full water state. In the hot water storage tank 2, the upper side is hot water and the lower side is cold water. The upper layer hot water and the lower layer water are maintained without mixing due to the difference in specific gravity.

貯湯タンク２の胴部２ｂには、補強部２ｄ，２ｅが形成されている。補強部２ｄ，２ｅを形成したことで、胴部２ｂの剛性を高くできる。補強部２ｄは、補強部２ｅより上側にある。補強部２ｄは、貯湯タンク２の高さ方向の中央より上側にある。補強部２ｅは、貯湯タンク２の高さ方向の中央より下側にある。補強部２ｄの形状と、補強部２ｅの形状とは、同じまたは類似である。補強部２ｄ，２ｅの各々は、貯湯タンク２の内方に凸な形状である。補強部２ｄ，２ｅの各々は、貯湯タンク２を外側から見た際に凹状である。補強部２ｄ，２ｅの各々は、例えばビード加工によって形成されてもよい。補強部２ｄ，２ｅの各々は、胴部２ｂの全周に渡って環状に形成されてもよい。または、補強部２ｄ，２ｅの各々は、胴部２ｂの周方向に沿って複数の箇所に分かれて形成されてもよいし、胴部２ｂの周方向の一箇所に形成されてもよい。   Reinforcing portions 2 d and 2 e are formed on the body 2 b of the hot water storage tank 2. By forming the reinforcing portions 2d and 2e, the rigidity of the body 2b can be increased. The reinforcing portion 2d is located above the reinforcing portion 2e. The reinforcing portion 2 d is above the center of the hot water storage tank 2 in the height direction. The reinforcing portion 2 e is located below the center of the hot water storage tank 2 in the height direction. The shape of the reinforcing portion 2d and the shape of the reinforcing portion 2e are the same or similar. Each of the reinforcing portions 2 d and 2 e has a shape convex inward of the hot water storage tank 2. Each of the reinforcing portions 2d and 2e is concave when the hot water storage tank 2 is viewed from the outside. Each of reinforcements 2d and 2e may be formed by bead processing, for example. Each of the reinforcing portions 2d and 2e may be formed annularly over the entire circumference of the body portion 2b. Alternatively, each of the reinforcing portions 2d and 2e may be divided into a plurality of locations along the circumferential direction of the body 2b, or may be formed at one location in the circumferential direction of the body 2b.

通常は、貯湯タンク２の内部は、水源の水圧が作用することで、正圧になっている。しかしながら、例えば水源の断水などの何らかの異常が生じた場合に、貯湯タンク２の内部が負圧になることがある。本実施の形態であれば、貯湯タンク２の胴部２ｂが補強部２ｄ，２ｅを備えたことで、貯湯タンク２の内部が負圧になった場合であっても、貯湯タンク２が座屈変形したりすることを確実に防止できる。   Normally, inside of the hot water storage tank 2 is positive pressure by the action of the water pressure of the water source. However, the inside of the hot water storage tank 2 may be under negative pressure, for example, when some trouble such as water supply failure occurs. In the present embodiment, the trunk portion 2b of the hot water storage tank 2 is provided with the reinforcing portions 2d and 2e, whereby the hot water storage tank 2 is buckled even when the pressure inside the hot water storage tank 2 becomes negative. It is possible to reliably prevent deformation.

貯湯式給湯機１は、貯湯タンク２の水を加熱して湯にする加熱装置を備える。この加熱装置は、いかなる構成のものでもよい。例えば、ヒートポンプ式加熱装置でもよいし、貯湯タンク２内に設置される電気ヒータでもよい。貯湯タンク２を収納する筐体１０の外に加熱装置が備えられてもよい。加熱装置は、本発明の特徴部分ではないため、本明細書では図示及び詳細な説明を省略する。また、筐体１０内には、配管、バルブ、ポンプ、熱交換器などの機器が備えられていてもよいが、本明細書では、これらの機器についても図示及び詳細な説明を省略する。   The hot water storage type hot water supply device 1 includes a heating device that heats the water of the hot water storage tank 2 to make it hot water. The heating device may be of any configuration. For example, a heat pump type heating device may be used, or an electric heater installed in the hot water storage tank 2 may be used. A heating device may be provided outside the housing 10 for storing the hot water storage tank 2. The heating device is not a feature of the present invention, and thus the illustration and the detailed description will be omitted herein. Moreover, although apparatuses, such as piping, a valve, a pump, a heat exchanger, may be provided in the housing | casing 10, illustration and detailed description are abbreviate | omitted also about these apparatuses in this specification.

筐体１０の内面と、貯湯タンク２の外面との間には、第一断熱材３、第二断熱材４、第三断熱材５、及び第四断熱材６が備えられている。貯湯タンク２は、これらの断熱材により覆われている。なお、筐体１０の壁の厚さは、これらの断熱材の厚さに比べて薄いため、図２では、便宜上、筐体１０の壁の厚さを無視して直線で表している。   A first heat insulator 3, a second heat insulator 4, a third heat insulator 5, and a fourth heat insulator 6 are provided between the inner surface of the housing 10 and the outer surface of the hot water storage tank 2. The hot water storage tank 2 is covered by these heat insulating materials. In addition, since the thickness of the wall of the housing | casing 10 is thin compared with the thickness of these heat insulating materials, in FIG. 2, the thickness of the wall of the housing | casing 10 is disregarded and it represents with a straight line for convenience.

第一断熱材３は、シート状または薄板状である。本実施の形態における第一断熱材３は、真空断熱材である。すなわち、第一断熱材３は、例えば発泡体、粉体、繊維体等をシート状に加工した芯材またはコア材を、ガスバリア性フィルムからなる外皮材で袋状に包み、内部を真空に近い減圧状態とし、ガスバリア性フィルムの外周部を熱溶着して密封した構成を有する。ガスバリア性フィルムとしては、例えば、プラスチックフィルム、プラスチック金属ラミネートフィルム等が用いられる。このような第一断熱材３は、極めて低い熱伝導率を有する。このため、第一断熱材３は、他の断熱材に比べて厚さが薄くても、優れた断熱性を有する。   The first heat insulating material 3 is in the form of a sheet or a thin plate. The first heat insulating material 3 in the present embodiment is a vacuum heat insulating material. That is, in the first heat insulating material 3, for example, a core material or a core material obtained by processing a foam, a powder, a fiber or the like into a sheet is wrapped in a bag shape with an outer covering made of a gas barrier film, and the inside is close to vacuum. The outer peripheral portion of the gas barrier film is heat-welded and sealed in a reduced pressure state. As the gas barrier film, for example, a plastic film, a plastic metal laminate film or the like is used. Such first heat insulating material 3 has extremely low thermal conductivity. For this reason, the first heat insulating material 3 has excellent heat insulating properties even if the thickness is smaller than other heat insulating materials.

第一断熱材３は、貯湯タンク２の胴部２ｂの外周を少なくとも部分的に覆う。第一断熱材３は、胴部２ｂの外周面に並行して、円筒面状に湾曲していてもよい。１枚の第一断熱材３が、胴部２ｂの全周を覆ってもよい。または、２枚の第一断熱材３が、胴部２ｂを半周ずつ覆ってもよい。または、３枚以上の第一断熱材３を組み合わせて、胴部２ｂを覆ってもよい。   The first heat insulating material 3 at least partially covers the outer periphery of the body 2 b of the hot water storage tank 2. The first heat insulating material 3 may be curved in a cylindrical surface shape in parallel with the outer peripheral surface of the body 2 b. One sheet of the first heat insulating material 3 may cover the entire circumference of the body 2 b. Alternatively, two first heat insulating materials 3 may cover the body portion 2 b by half. Alternatively, three or more first heat insulating materials 3 may be combined to cover the body 2 b.

本実施の形態であれば、優れた断熱性を有する真空断熱材で第一断熱材３を構成したことで、貯湯タンク２の保温性能を向上できる。また、貯湯タンク２のうちで直径が最も大きくなる胴部２ｂを他の断熱材に比べて薄い第一断熱材３で覆うことで、省スペースにでき、筐体１０の小型化が図れる。   According to the present embodiment, the heat insulating performance of the hot water storage tank 2 can be improved by configuring the first heat insulating material 3 with a vacuum heat insulating material having excellent heat insulating properties. Further, by covering the trunk portion 2b having the largest diameter in the hot water storage tank 2 with the first heat insulating material 3 thinner than the other heat insulating materials, space saving can be achieved, and downsizing of the housing 10 can be achieved.

一般に、真空断熱材は、外皮材に孔があくことなどで内部の減圧状態が失われると、断熱性が大きく低下する。貯湯タンク２内に貯留される高温の湯の熱で、貯湯タンク２の外面は高温になる。真空断熱材が貯湯タンク２の外面に直接触れていると、高温のために真空断熱材の外皮材が熱劣化しやすくなる。   In general, the heat insulating property of the vacuum heat insulating material is greatly reduced when the internal pressure is lost due to the formation of a hole in the skin material or the like. The outer surface of the hot water storage tank 2 becomes hot due to the heat of the hot water stored in the hot water storage tank 2. When the vacuum heat insulating material is in direct contact with the outer surface of the hot water storage tank 2, the outer surface of the vacuum heat insulating material is easily thermally deteriorated due to the high temperature.

本実施の形態では、第一断熱材３は、貯湯タンク２の外周面すなわち胴部２ｂの外周面に対して、非接触である。すなわち、第一断熱材３は、貯湯タンク２に接触していない。このような構成により、以下の効果が得られる。第一断熱材３すなわち真空断熱材の外皮材の熱劣化を抑制できる。そのため、当該外皮材に孔があくことを確実に抑制でき、第一断熱材３すなわち真空断熱材の内部の減圧状態が失われることを確実に抑制できる。   In the present embodiment, the first heat insulating material 3 is not in contact with the outer peripheral surface of the hot water storage tank 2, that is, the outer peripheral surface of the body 2b. That is, the first heat insulating material 3 is not in contact with the hot water storage tank 2. By such a configuration, the following effects can be obtained. Thermal degradation of the first heat insulating material 3, that is, the skin of the vacuum heat insulating material can be suppressed. Therefore, it can suppress reliably that a hole is formed in the said outer covering material, and it can suppress reliably that the pressure reduction state inside the 1st heat insulating material 3, ie, a vacuum heat insulating material, is lose | eliminated.

第一断熱材３は、貯湯タンク２の胴部２ｂの外周面に対向する内周面３ａを有する。貯湯タンク２の胴部２ｂの外周面と、第一断熱材３の内周面３ａとの間には、空間７が形成されている。   The first heat insulating material 3 has an inner circumferential surface 3 a facing the outer circumferential surface of the body 2 b of the hot water storage tank 2. A space 7 is formed between the outer peripheral surface of the body 2 b of the hot water storage tank 2 and the inner peripheral surface 3 a of the first heat insulating material 3.

本実施の形態における第二断熱材４、第三断熱材５、及び第四断熱材６の各々は、成形断熱材である。第二断熱材４、第三断熱材５、及び第四断熱材６の各々は、発泡プラスチックで成形されたものでもよい。当該発泡プラスチックは、発泡ポリスチレンでもよい。第二断熱材４、第三断熱材５、及び第四断熱材６の各々は、発泡ポリスチレン以上の断熱性能を有する材料で作られてもよい。   Each of the second heat insulating material 4, the third heat insulating material 5, and the fourth heat insulating material 6 in the present embodiment is a molded heat insulating material. Each of the 2nd heat insulating material 4, the 3rd heat insulating material 5, and the 4th heat insulating material 6 may be shape | molded by foam plastic. The foamed plastic may be expanded polystyrene. Each of the 2nd heat insulating material 4, the 3rd heat insulating material 5, and the 4th heat insulating material 6 may be made with the material which has the heat insulation performance more than foaming polystyrene.

第二断熱材４、第三断熱材５、及び第四断熱材６の各々の熱伝導率は、第一断熱材３すなわち真空断熱材の熱伝導率に比べて高い。しかしながら、第二断熱材４、第三断熱材５、及び第四断熱材６の各々は、第一断熱材３に比べて厚い。このため、第二断熱材４、第三断熱材５、及び第四断熱材６の各々は、十分な断熱性を有する。   The thermal conductivity of each of the second thermal insulating material 4, the third thermal insulating material 5, and the fourth thermal insulating material 6 is higher than the thermal conductivity of the first thermal insulating material 3, that is, the vacuum thermal insulating material. However, each of the second heat insulating material 4, the third heat insulating material 5, and the fourth heat insulating material 6 is thicker than the first heat insulating material 3. For this reason, each of the 2nd heat insulating material 4, the 3rd heat insulating material 5, and the 4th heat insulating material 6 has sufficient heat insulation.

第二断熱材４は、本体部分４ａ、挿入部４ｂ、及び位置決め部４ｃを備える。第二断熱材４の本体部分４ａは、第一断熱材３が覆わない領域にて貯湯タンク２を覆う。本体部分４ａは、補強部２ｅの下側の胴部２ｂの外周面を覆う。本体部分４ａは、胴部２ｂの外周面に接触または近接してもよい。   The 2nd heat insulating material 4 is provided with the main-body part 4a, the insertion part 4b, and the positioning part 4c. The main body portion 4 a of the second heat insulating material 4 covers the hot water storage tank 2 in a region not covered by the first heat insulating material 3. The main body portion 4a covers the outer peripheral surface of the lower trunk 2b of the reinforcing portion 2e. The body portion 4a may be in contact with or in proximity to the outer peripheral surface of the body 2b.

補強部２ｅは、貯湯タンク２の胴部２ｂの外周面に凹部を形成する。第二断熱材４の挿入部４ｂは、補強部２ｅが形成する凹部に挿入する。挿入部４ｂは、内周側に向かって突出する凸部である。挿入部４ｂは、胴部２ｂの外周に沿って環状に形成されてもよい。挿入部４ｂは、補強部２ｅが形成する凹部を埋める形状を有してもよい。   The reinforcing portion 2 e forms a recess on the outer peripheral surface of the body 2 b of the hot water storage tank 2. The insertion part 4b of the 2nd heat insulating material 4 is inserted in the recessed part which the reinforcement part 2e forms. The insertion part 4b is a convex part which protrudes toward the inner peripheral side. The insertion portion 4 b may be annularly formed along the outer periphery of the body 2 b. The insertion part 4b may have a shape which fills the recessed part which the reinforcement part 2e forms.

本実施の形態であれば、第二断熱材４が挿入部４ｂを備えることで、以下の効果が得られる。補強部２ｅが形成する凹部に挿入部４ｂが挿入することで、貯湯タンク２の軸方向すなわち高さ方向に関して、貯湯タンク２に対して第二断熱材４を容易かつ適正に位置決めできる。貯湯タンク２の軸方向すなわち高さ方向に関して、貯湯タンク２に対する第二断熱材４の位置ずれを確実に防止できる。   In the present embodiment, the second heat insulating material 4 includes the insertion portion 4 b, whereby the following effects can be obtained. By inserting the insertion portion 4b into the recess formed by the reinforcing portion 2e, the second heat insulating material 4 can be easily and properly positioned with respect to the hot water storage tank 2 with respect to the axial direction of the hot water storage tank 2, that is, the height direction. The positional displacement of the second heat insulating material 4 with respect to the hot water storage tank 2 can be reliably prevented with respect to the axial direction, ie, the height direction, of the hot water storage tank 2.

第二断熱材４の位置決め部４ｃは、第一断熱材３の下端部を位置決めする。位置決め部４ｃは、第一接触部４ｄ及び第二接触部４ｅを備える。第一接触部４ｄは、第一断熱材３の下端付近の内周面に接触する。第二接触部４ｅは、第一断熱材３の下端の端面に接触する。第一接触部４ｄと第一断熱材３との接触面は、貯湯タンク２の胴部２ｂの外周面よりも外周側にある。   The positioning portion 4 c of the second heat insulating material 4 positions the lower end portion of the first heat insulating material 3. Positioning part 4c is provided with the 1st contact part 4d and the 2nd contact part 4e. The first contact portion 4 d contacts the inner circumferential surface near the lower end of the first heat insulating material 3. The second contact portion 4 e contacts the end face of the lower end of the first heat insulating material 3. The contact surface between the first contact portion 4 d and the first heat insulating material 3 is on the outer peripheral side of the outer peripheral surface of the body portion 2 b of the hot water storage tank 2.

本実施の形態であれば、第二断熱材４が位置決め部４ｃを備えることで、以下の効果が得られる。第一断熱材３を取り付けるときに第一断熱材３を容易かつ適正に位置決めできる。貯湯タンク２に対する第一断熱材３の位置ずれを確実に防止できる。貯湯タンク２に第一断熱材３が直接触れることを確実に防止できる。第一接触部４ｄが第一断熱材３に接触することで、貯湯タンク２の胴部２ｂの外周面と第一断熱材３との距離を適正な距離に確実に維持できる。第二接触部４ｅが第一断熱材３に接触することで、貯湯タンク２の軸方向すなわち高さ方向に関して、第一断熱材３の位置を適正な位置に確実に保持できる。   In the present embodiment, the second heat insulating material 4 includes the positioning portion 4c, whereby the following effects can be obtained. When attaching the first heat insulating material 3, the first heat insulating material 3 can be easily and properly positioned. Positional displacement of the first heat insulating material 3 with respect to the hot water storage tank 2 can be reliably prevented. Direct contact of the first heat insulating material 3 with the hot water storage tank 2 can be reliably prevented. When the first contact portion 4 d contacts the first heat insulating material 3, the distance between the outer circumferential surface of the body 2 b of the hot water storage tank 2 and the first heat insulating material 3 can be reliably maintained at an appropriate distance. When the second contact portion 4 e contacts the first heat insulating material 3, the position of the first heat insulating material 3 can be reliably held at an appropriate position in the axial direction of the hot water storage tank 2, that is, the height direction.

第二断熱材４は、貯湯タンク２の胴部２ｂを全周に渡って覆う円筒状の形状でもよい。すなわち、一つの第二断熱材４が貯湯タンク２の胴部２ｂを全周に渡って覆ってもよい。または、貯湯タンク２の胴部２ｂを周方向において第二断熱材４が複数に分割されていてもよい。すなわち、胴部２ｂを周方向に関して部分的に覆う第二断熱材４を複数組み合わせることで胴部２ｂが覆われてもよい。例えば、胴部２ｂを半周ずつ覆う２個の第二断熱材４を組み合わせることで胴部２ｂが覆われてもよい。   The second heat insulating material 4 may have a cylindrical shape that covers the body 2 b of the hot water storage tank 2 over the entire circumference. That is, one second heat insulating material 4 may cover the body 2 b of the hot water storage tank 2 all around. Alternatively, the second heat insulating material 4 may be divided into a plurality of parts in the circumferential direction of the body 2 b of the hot water storage tank 2. That is, the body 2b may be covered by combining a plurality of second heat insulating materials 4 partially covering the body 2b in the circumferential direction. For example, the body 2b may be covered by combining two second heat insulating materials 4 that cover the body 2b half a turn.

第三断熱材５は、本体部分５ａ及び位置決め部５ｂを備える。第三断熱材５の本体部分５ａは、第一断熱材３が覆わない領域にて貯湯タンク２を覆う。本体部分５ａは、貯湯タンク２の上鏡板２ａの外面を覆う。本体部分５ａは、上鏡板２ａの外面の凸面に対応した形状の凹面を有してもよい。本体部分５ａの凹面が上鏡板２ａの外面に対して接触または近接してもよい。   The 3rd heat insulating material 5 is provided with the main-body part 5a and the positioning part 5b. The main body portion 5 a of the third heat insulating material 5 covers the hot water storage tank 2 in a region not covered by the first heat insulating material 3. The main body portion 5 a covers the outer surface of the upper mirror plate 2 a of the hot water storage tank 2. The body portion 5a may have a concave surface having a shape corresponding to the convex surface of the outer surface of the upper mirror plate 2a. The concave surface of the main body portion 5a may be in contact with or in proximity to the outer surface of the upper mirror plate 2a.

第三断熱材５の位置決め部５ｂは、第一断熱材３の上端部を位置決めする。すなわち、第二断熱材４が位置決め部４ｃが位置決めする第一断熱材３の下端部と反対側の端部である上端部を第三断熱材５の位置決め部５ｂが位置決めする。位置決め部５ｂは、第一接触部５ｃ及び第二接触部５ｄを備える。第一接触部５ｃは、第一断熱材３の上端付近の内周面に接触する。第二接触部５ｄは、第一断熱材３の上端の端面に接触する。第一接触部５ｃと第一断熱材３との接触面は、貯湯タンク２の胴部２ｂの外周面よりも外周側にある。   The positioning portion 5 b of the third heat insulating material 5 positions the upper end portion of the first heat insulating material 3. That is, the positioning part 5b of the third heat insulating material 5 positions the upper end which is the end opposite to the lower end of the first heat insulating material 3 which the second heat insulating material 4 positions by the positioning part 4c. Positioning part 5b is provided with the 1st contact part 5c and the 2nd contact part 5d. The first contact portion 5 c contacts the inner circumferential surface near the upper end of the first heat insulating material 3. The second contact portion 5 d contacts the end face of the upper end of the first heat insulating material 3. The contact surface between the first contact portion 5 c and the first heat insulating material 3 is on the outer peripheral side of the outer peripheral surface of the body 2 b of the hot water storage tank 2.

本実施の形態であれば、第三断熱材５が位置決め部５ｂを備えることで、以下の効果が得られる。第一断熱材３を取り付けるときに第一断熱材３を容易かつ適正に位置決めできる。貯湯タンク２に対する第一断熱材３の位置ずれを確実に防止できる。貯湯タンク２に第一断熱材３が直接触れることを確実に防止できる。第一接触部５ｃが第一断熱材３に接触することで、貯湯タンク２の胴部２ｂの外周面と第一断熱材３との距離を適正な距離に確実に維持できる。第二接触部５ｄが第一断熱材３に接触することで、貯湯タンク２の軸方向すなわち高さ方向に関して、第一断熱材３の位置を適正な位置に確実に保持できる。   In the present embodiment, the third heat insulating material 5 includes the positioning portion 5b, whereby the following effects can be obtained. When attaching the first heat insulating material 3, the first heat insulating material 3 can be easily and properly positioned. Positional displacement of the first heat insulating material 3 with respect to the hot water storage tank 2 can be reliably prevented. Direct contact of the first heat insulating material 3 with the hot water storage tank 2 can be reliably prevented. When the first contact portion 5 c contacts the first heat insulating material 3, the distance between the outer circumferential surface of the body 2 b of the hot water storage tank 2 and the first heat insulating material 3 can be reliably maintained at an appropriate distance. When the second contact portion 5 d contacts the first heat insulating material 3, the position of the first heat insulating material 3 can be reliably held at an appropriate position in the axial direction of the hot water storage tank 2, that is, the height direction.

第四断熱材６は、貯湯タンク２の下鏡板２ｃの外面を覆う。第四断熱材６は、下鏡板２ｃの外面の凸面に対応した形状の凹面を有する。第四断熱材６の凹面が下鏡板２ｃの外面に対して接触または近接してもよい。第四断熱材６の上端面は、第二断熱材４の下端面に接触してもよい。   The fourth heat insulating material 6 covers the outer surface of the lower end plate 2 c of the hot water storage tank 2. The fourth heat insulating material 6 has a concave surface having a shape corresponding to the convex surface of the outer surface of the lower mirror plate 2c. The concave surface of the fourth heat insulating material 6 may be in contact with or in proximity to the outer surface of the lower mirror plate 2c. The upper end surface of the fourth heat insulating material 6 may be in contact with the lower end surface of the second heat insulating material 4.

本実施の形態では、貯湯タンク２の軸方向すなわち高さ方向の位置に関して、第一断熱材３の中心位置は、第二断熱材４の中心位置より上にある。貯湯タンク２内の湯水の温度は、上側ほど高い。このため、貯湯タンク２の上部寄りの部分からの放熱を抑制することが特に重要である。本実施の形態であれば、断熱性に優れた真空断熱材である第一断熱材３を、第二断熱材４より上側に配置することで、貯湯タンク２の上部寄りの部分からの放熱を十分に低減できる。   In the present embodiment, the center position of the first heat insulating material 3 is above the center position of the second heat insulating material 4 with respect to the position of the hot water storage tank 2 in the axial direction, that is, the height direction. The temperature of the hot and cold water in the hot water storage tank 2 is higher toward the upper side. For this reason, it is particularly important to suppress the heat radiation from the portion near the upper part of the hot water storage tank 2. In the present embodiment, by disposing the first heat insulating material 3 which is a vacuum heat insulating material excellent in heat insulating property above the second heat insulating material 4, heat dissipation from the portion near the upper part of the hot water storage tank 2 is achieved. It can be reduced sufficiently.

第一断熱材３の上端の位置は、貯湯タンク２の胴部２ｂと上鏡板２ａとの境界の位置と同じ高さであるか、当該境界の位置より高い位置であることが望ましい。そのようにすることで、貯湯タンク２の上部寄りの部分からの放熱をより確実に低減できる。   It is desirable that the position of the upper end of the first heat insulating material 3 be at the same height as the position of the boundary between the body portion 2b of the hot water storage tank 2 and the upper end plate 2a or higher than the position of the boundary. By doing so, the heat radiation from the portion near the top of the hot water storage tank 2 can be reduced more reliably.

本実施の形態では、貯湯タンク２の胴部２ｂのうちの下側の一部分は、第二断熱材４のみで覆われ、第一断熱材３で覆われていない。貯湯タンク２の下部寄りの部分には、低温の水が貯留されている時間が長い。このため、貯湯タンク２の上部に比べると、断熱性能に対する要求は低い。よって、貯湯タンク２の胴部２ｂのうちの下側の一部分が、熱伝導率の低い第一断熱材３で覆われていなくても、放熱ロスに及ぼす影響は小さい。   In the present embodiment, a lower part of the body 2 b of the hot water storage tank 2 is covered only with the second heat insulating material 4 and not covered with the first heat insulating material 3. In the portion near the lower part of the hot water storage tank 2, the time when low temperature water is stored is long. For this reason, compared with the upper part of the hot water storage tank 2, the request | requirement with respect to heat insulation performance is low. Therefore, even if the lower part of the body portion 2b of the hot water storage tank 2 is not covered with the first heat insulating material 3 having a low thermal conductivity, the influence on the heat radiation loss is small.

図３は、貯湯タンク２、第一断熱材３、及び第二断熱材４の部分的な断面図である。図３は、図２の一部を拡大した図に相当する。図３では、筐体１０の図示を省略する。図３に示すように、補強部２ｅは、縮径部２ｆ、第一テーパ部２ｇ及び第二テーパ部２ｈを備える。縮径部２ｆは、補強部２ｄ，２ｅ以外の部分の胴部２ｂに比べて小さい直径を有する円筒状を呈する。第一テーパ部２ｇは、縮径部２ｆの上に形成される。第一テーパ部２ｇは、縮径部２ｆと、補強部２ｅの上の胴部２ｂとの間をつなぐ。第一テーパ部２ｇの直径は、上に向かって連続的に拡大する。第二テーパ部２ｈは、縮径部２ｆの下に形成される。第二テーパ部２ｈは、縮径部２ｆと、補強部２ｅの下の胴部２ｂとの間をつなぐ。第二テーパ部２ｈは、下に向かって連続的に拡大する。本実施の形態の補強部２ｅであれば、各部の曲げ角度が鈍角になるので、応力集中を緩和できる。このため、金属疲労を抑制できる。   FIG. 3 is a partial cross-sectional view of the hot water storage tank 2, the first heat insulating material 3, and the second heat insulating material 4. FIG. 3 corresponds to an enlarged view of a part of FIG. In FIG. 3, illustration of the housing 10 is omitted. As shown in FIG. 3, the reinforcement part 2e is provided with the diameter reduction part 2f, the 1st taper part 2g, and the 2nd taper part 2h. The reduced diameter portion 2 f has a cylindrical shape having a smaller diameter than the body portion 2 b of the portion other than the reinforcing portions 2 d and 2 e. The first tapered portion 2g is formed on the reduced diameter portion 2f. The first tapered portion 2g connects between the reduced diameter portion 2f and the body portion 2b on the reinforcing portion 2e. The diameter of the first tapered portion 2g continuously increases upward. The second tapered portion 2h is formed below the reduced diameter portion 2f. The second tapered portion 2 h connects between the reduced diameter portion 2 f and the trunk portion 2 b below the reinforcing portion 2 e. The second tapered portion 2 h continuously expands downward. In the case of the reinforcing portion 2e of the present embodiment, the bending angle of each portion is an obtuse angle, so that stress concentration can be alleviated. For this reason, metal fatigue can be suppressed.

本実施の形態の補強部２ｅが形成する凹部の断面形状は、台形である。第二断熱材４の挿入部４ｂの断面形状は、補強部２ｅが形成する凹部の断面形状に対応している。すなわち、第二断熱材４の挿入部４ｂの断面形状は、台形である。   The cross-sectional shape of the recess formed by the reinforcing portion 2e of the present embodiment is trapezoidal. The cross-sectional shape of the insertion part 4b of the 2nd heat insulating material 4 respond | corresponds to the cross-sectional shape of the recessed part which the reinforcement part 2e forms. That is, the cross-sectional shape of the insertion part 4b of the 2nd heat insulating material 4 is trapezoid.

貯湯タンク２の軸方向すなわち高さ方向の位置に関して、第二断熱材４の位置決め部４ｃは、挿入部４ｂと重なる位置にある。貯湯タンク２の軸方向すなわち高さ方向の位置に関して、挿入部４ｂは、図３中のＢで示す範囲にある。位置決め部４ｃ全体の位置は、貯湯タンク２の軸方向すなわち高さ方向に関して、このＢの範囲に含まれている。このような構成により、本実施の形態であれば、以下の効果が得られる。位置決め部４ｃの位置において第二断熱材４の厚さが薄くなることを防止できる。例えば発泡プラスチックで第二断熱材４が作られている場合、厚さの薄い部分があると、その部分の強度が低くなり、その部分で第二断熱材４が割れやすくなる。これに対し、本実施の形態であれば、位置決め部４ｃの位置において第二断熱材４の厚さが薄くなることを防止できるので、第二断熱材４が割れやすくならないという利点がある。   With respect to the position of the hot water storage tank 2 in the axial direction, that is, the height direction, the positioning portion 4c of the second heat insulating material 4 is at a position overlapping the insertion portion 4b. With respect to the position of the hot water storage tank 2 in the axial direction, that is, in the height direction, the insertion portion 4 b is in the range indicated by B in FIG. 3. The entire position of the positioning portion 4 c is included in the range of B with respect to the axial direction, ie, the height direction, of the hot water storage tank 2. According to this configuration, according to the present embodiment, the following effects can be obtained. It can prevent that the thickness of the 2nd heat insulating material 4 becomes thin in the position of the positioning part 4c. For example, in the case where the second heat insulating material 4 is made of foamed plastic, if there is a thin portion, the strength of the portion becomes low and the second heat insulating material 4 tends to be broken at that portion. On the other hand, according to the present embodiment, since the thickness of the second heat insulating material 4 can be prevented from being reduced at the position of the positioning portion 4 c, there is an advantage that the second heat insulating material 4 is not easily broken.

貯湯タンク２の軸方向の位置に関して、位置決め部４ｃは、少なくとも部分的に、挿入部４ｂと重なる位置にあればよい。すなわち、位置決め部４ｃの一部が、貯湯タンク２の軸方向の位置に関して、挿入部４ｂと重ならなくてもよい。例えば、位置決め部４ｃの第一接触部４ｄの一部が図３中でＢの範囲より上まで延びていてもよい。そのような構成の場合でも、上記効果に類似した効果が得られる。   With respect to the position of the hot water storage tank 2 in the axial direction, the positioning portion 4c may be at least partially at a position overlapping the insertion portion 4b. That is, a part of the positioning portion 4c may not overlap with the insertion portion 4b with respect to the position of the hot water storage tank 2 in the axial direction. For example, a part of the first contact portion 4d of the positioning portion 4c may extend above the range of B in FIG. Even in the case of such a configuration, an effect similar to the above effect can be obtained.

図３中のｔ１，ｔ２，ｔ３で示す寸法は、以下の寸法を表す。ｔ１は、第二断熱材４の本体部分４ａの厚さである。ｔ２は、第二断熱材４の挿入部４ｂの表面と位置決め部４ｃの表面との間の最小距離である。ｔ３は、位置決め部４ｃ及び挿入部４ｂにおける第二断熱材４の最大厚さである。なお、「厚さ」とは、貯湯タンク２の中心軸に対して垂直な方向の寸法をいうものとする。   The dimensions shown by t1, t2 and t3 in FIG. 3 represent the following dimensions. t1 is the thickness of the main portion 4a of the second heat insulating material 4. t2 is the minimum distance between the surface of the insertion portion 4b of the second heat insulating material 4 and the surface of the positioning portion 4c. t3 is the maximum thickness of the second heat insulating material 4 in the positioning portion 4c and the insertion portion 4b. The term “thickness” refers to a dimension in a direction perpendicular to the central axis of the hot water storage tank 2.

ｔ２は、ｔ１に等しいか、またはｔ１より大きいことが望ましい。そのような条件を満足することで、第二断熱材４が割れやすくなることをより確実に防止できる。   It is desirable that t2 be equal to or greater than t1. By satisfying such conditions, it is possible to more reliably prevent the second heat insulating material 4 from being easily broken.

ｔ３は、ｔ１に等しいか、またはｔ１より大きいことが望ましい。そのような条件を満足することで、第二断熱材４が割れやすくなることをより確実に防止できる。   It is desirable that t3 be equal to or greater than t1. By satisfying such conditions, it is possible to more reliably prevent the second heat insulating material 4 from being easily broken.

第一断熱材３は、貯湯タンク２の外周側に向く外周面３ｂを有する。第二断熱材４の本体部分４ａは、貯湯タンク２の外周側に向く外周面４ｆを有する。図３中のＤ１，Ｄ２で示す寸法は、以下の寸法を表す。Ｄ１は、第一断熱材３の外周面３ｂと、貯湯タンク２の中心軸との距離である。Ｄ２は、第二断熱材４の本体部分４ａの外周面４ｆと、貯湯タンク２の中心軸との距離である。第一断熱材３と第二断熱材４との接合箇所の少なくとも一部において、Ｄ１がＤ２に実質的に等しいか、Ｄ１がＤ２より小さいことが望ましい。そのような条件を満足することで、第一断熱材３及び第二断熱材４をより省スペースで配置でき、筐体１０の小型化が図れる。   The first heat insulating material 3 has an outer peripheral surface 3 b facing the outer peripheral side of the hot water storage tank 2. The main body portion 4 a of the second heat insulating material 4 has an outer peripheral surface 4 f facing the outer peripheral side of the hot water storage tank 2. The dimensions indicated by D1 and D2 in FIG. 3 represent the following dimensions. D <b> 1 is the distance between the outer peripheral surface 3 b of the first heat insulating material 3 and the central axis of the hot water storage tank 2. D2 is the distance between the outer peripheral surface 4f of the main portion 4a of the second heat insulating material 4 and the central axis of the hot water storage tank 2. It is desirable that D1 be substantially equal to D2 or D1 be smaller than D2 in at least a part of the joint between the first heat insulating material 3 and the second heat insulating material 4. By satisfying such conditions, the first heat insulating material 3 and the second heat insulating material 4 can be disposed in a more space-saving manner, and downsizing of the housing 10 can be achieved.

第一断熱材３の外周面３ｂ、及び第二断熱材４の本体部分４ａの外周面４ｆが、少なくとも部分的に、筐体１０の内壁に接触してもよい。そのようにすることで、第一断熱材３及び第二断熱材４をより省スペースで配置でき、筐体１０の小型化が図れる。   The outer peripheral surface 3 b of the first heat insulating material 3 and the outer peripheral surface 4 f of the main body portion 4 a of the second heat insulating material 4 may contact the inner wall of the housing 10 at least partially. By doing so, the first heat insulating material 3 and the second heat insulating material 4 can be disposed in a more space-saving manner, and the housing 10 can be miniaturized.

図４は、第一断熱材３及び第二断熱材４の部分的な断面図である。図４では、筐体１０の図示を省略する。図４に示すように、第一断熱材３は、端部から張り出すヒレ部３ｃを備える。ヒレ部３ｃは、真空断熱材の外皮材が芯材の外縁より外側の位置で溶着されることで形成されたものである。ヒレ部３ｃは、第二断熱材４の位置決め部４ｃの第二接触部４ｅに接触する。ヒレ部３ｃは、貯湯タンク２側と反対側に曲げられている。すなわち、ヒレ部３ｃは、図４中で左側に曲げられている。このような構成により、以下の効果が得られる。貯湯タンク２内の湯の熱がヒレ部３ｃに伝わることを抑制できる。ヒレ部３ｃの熱劣化を抑制できる。ヒレ部３ｃの劣化によって真空断熱材の気密性が損なわれることを確実に防止できる。   FIG. 4 is a partial cross-sectional view of the first heat insulating material 3 and the second heat insulating material 4. In FIG. 4, the casing 10 is not shown. As shown in FIG. 4, the first heat insulating material 3 includes a fin portion 3 c protruding from an end. The fins 3c are formed by welding the outer cover material of the vacuum heat insulating material at a position outside the outer edge of the core material. Fin portion 3 c contacts second contact portion 4 e of positioning portion 4 c of second heat insulating material 4. The fins 3c are bent to the side opposite to the hot water storage tank 2 side. That is, the fins 3c are bent to the left in FIG. By such a configuration, the following effects can be obtained. It can suppress that the heat of the hot water in the hot water storage tank 2 transfers to the fin part 3c. The thermal deterioration of the fins 3c can be suppressed. It is possible to reliably prevent the airtightness of the vacuum heat insulating material from being impaired due to the deterioration of the fins 3c.

図４に示すように、第一断熱材３が第二断熱材４に対して粘着テープ８によって固定されていてもよい。粘着テープ８によって第一断熱材３及び第二断熱材４を貼り合わせることで、第一断熱材３の位置ずれをより確実に防止できる。   As shown in FIG. 4, the first heat insulating material 3 may be fixed to the second heat insulating material 4 by the adhesive tape 8. By bonding the first heat insulating material 3 and the second heat insulating material 4 together with the adhesive tape 8, positional deviation of the first heat insulating material 3 can be more reliably prevented.

本実施の形態では、真空断熱材を第一断熱材３として用いる例について説明したが、第一断熱材３は、真空断熱材以外の断熱材でもよい。第一断熱材３は、第二断熱材４に比べて熱伝導率の低い断熱材であればよい。   In the present embodiment, an example in which a vacuum heat insulating material is used as the first heat insulating material 3 has been described, but the first heat insulating material 3 may be a heat insulating material other than the vacuum heat insulating material. The first heat insulating material 3 may be a heat insulating material having a thermal conductivity lower than that of the second heat insulating material 4.

１ 貯湯式給湯機、 ２ 貯湯タンク、 ２ａ 上鏡板、 ２ｂ 胴部、 ２ｃ 下鏡板、 ２ｄ，２ｅ 補強部、 ２ｆ 縮径部、 ２ｇ 第一テーパ部、 ２ｈ 第二テーパ部、 ３ 第一断熱材、 ３ａ 内周面、 ３ｂ 外周面、 ３ｃ ヒレ部、 ４ 第二断熱材、 ４ａ 本体部分、 ４ｂ 挿入部、 ４ｃ 位置決め部、 ４ｄ 第一接触部、 ４ｅ 第二接触部、 ４ｆ 外周面、 ５ 第三断熱材、 ５ａ 本体部分、 ５ｂ 位置決め部、 ５ｃ 第一接触部、 ５ｄ 第二接触部、 ６ 第四断熱材、 ７ 空間、 ８ 粘着テープ、 １０ 筐体、 １１ 脚 1 hot water storage type water heater, 2 hot water storage tank, 2a upper mirror plate, 2b body portion, 2c lower mirror plate, 2d, 2e reinforcing portion, 2f reduced diameter portion, 2g first tapered portion, 2h second tapered portion, 3 first heat insulating material , 3a inner circumferential surface, 3b outer circumferential surface, 3c fin portion, 4 second heat insulating material, 4a main body portion, 4b insertion portion, 4c positioning portion, 4d first contact portion, 4e second contact portion, 4f outer circumferential surface, 5 fifth Three heat insulating materials, 5a body part, 5b positioning part, 5c first contact part, 5d second contact part, 6 fourth heat insulating material, 7 spaces, 8 adhesive tapes, 10 cases, 11 legs

Claims (10)

外周面に凹部を有する貯湯タンクと、
前記貯湯タンクを覆う第一断熱材と、
前記第一断熱材の熱伝導率より高い熱伝導率を有し、前記第一断熱材より厚い第二断熱材と、
を備え、
前記第二断熱材は、前記第一断熱材が覆わない領域にて前記貯湯タンクを覆う本体部分と、前記凹部に挿入する挿入部と、前記第一断熱材の端部を位置決めする位置決め部と、を備え、
前記貯湯タンクの軸方向の位置に関して、前記位置決め部は、少なくとも部分的に、前記挿入部と重なる位置にある貯湯式給湯機。 A hot water storage tank having a recess on the outer peripheral surface,
A first insulating material covering the hot water storage tank;
A second heat insulating material having a thermal conductivity higher than that of the first heat insulating material and thicker than the first heat insulating material;
Equipped with
The second heat insulating material includes a main body portion covering the hot water storage tank in a region not covered by the first heat insulating material, an insertion portion inserted into the recess, and a positioning portion positioning the end portion of the first heat insulating material , And
The hot water storage type hot water supply apparatus, wherein the positioning portion at least partially overlaps the insertion portion with respect to the axial position of the hot water storage tank. 前記第一断熱材は、前記貯湯タンクの前記外周面に対向する内周面を有し、
前記第二断熱材の前記位置決め部は、前記第一断熱材の前記内周面に接触する第一接触部と、前記第一断熱材の端面に接触する第二接触部とを備える請求項１に記載の貯湯式給湯機。 The first heat insulating material has an inner circumferential surface facing the outer circumferential surface of the hot water storage tank,
The positioning portion of the second heat insulating material includes a first contact portion in contact with the inner circumferential surface of the first heat insulating material, and a second contact portion in contact with an end surface of the first heat insulating material. The hot water storage type water heater as described in. 前記貯湯タンクの軸方向の位置に関して、前記第一断熱材の中心位置は、前記第二断熱材の中心位置より上にある請求項１または請求項２に記載の貯湯式給湯機。   The hot water storage type hot water supply apparatus according to claim 1 or 2, wherein the central position of the first heat insulating material is above the central position of the second heat insulating material with respect to the position of the hot water storage tank in the axial direction. 前記貯湯タンクの前記外周面に対して前記第一断熱材が非接触となる請求項１から請求項３のいずれか一項に記載の貯湯式給湯機。   The hot water storage type hot water supply apparatus according to any one of claims 1 to 3, wherein the first heat insulating material is not in contact with the outer peripheral surface of the hot water storage tank. 前記第二断熱材の前記挿入部の表面と前記位置決め部の表面との間の最小距離は、前記本体部分の厚さに等しいか、前記本体部分の厚さより大きい請求項１から請求項４のいずれか一項に記載の貯湯式給湯機。   The minimum distance between the surface of the insertion portion of the second heat insulating material and the surface of the positioning portion is equal to or greater than the thickness of the body portion. The hot water storage type water heater according to any one of the above. 前記挿入部及び前記位置決め部における前記第二断熱材の最大厚さは、前記本体部分の厚さに等しいか、前記本体部分の厚さより大きい請求項１から請求項５のいずれか一項に記載の貯湯式給湯機。   The maximum thickness of the said 2nd heat insulating material in the said insertion part and the said positioning part is equal to the thickness of the said main-body part, or is larger than the thickness of the said main-body part in any one of Claims 1-5 Storage hot water heater. 前記第一断熱材は、前記貯湯タンクの外周側に向く外周面を有し、
前記第二断熱材の前記本体部分は、前記貯湯タンクの外周側に向く外周面を有し、
前記第一断熱材の前記外周面と前記貯湯タンクの中心軸との距離が、前記本体部分の前記外周面と前記中心軸との距離に比べて、実質的に等しいか小さい箇所を備える請求項１から請求項６のいずれか一項に記載の貯湯式給湯機。 The first heat insulating material has an outer peripheral surface facing the outer peripheral side of the hot water storage tank,
The main body portion of the second heat insulating material has an outer peripheral surface facing the outer peripheral side of the hot water storage tank,
The distance between the outer peripheral surface of the first heat insulating material and the central axis of the hot water storage tank is substantially equal to or smaller than the distance between the outer peripheral surface of the main body portion and the central axis. The hot water storage type water heater according to any one of claims 1 to 6. 前記第一断熱材の熱伝導率より高い熱伝導率を有する第三断熱材を備え、
前記第三断熱材は、前記第一断熱材が覆わない領域にて前記貯湯タンクを覆う本体部分と、前記第一断熱材の前記端部と反対側の端部を位置決めする位置決め部とを備える請求項１から請求項７のいずれか一項に記載の貯湯式給湯機。 A third heat insulating material having a thermal conductivity higher than that of the first heat insulating material,
The third heat insulating material includes a main body portion covering the hot water storage tank in a region not covered by the first heat insulating material, and a positioning portion for positioning an end opposite to the end of the first heat insulating material. The hot water storage type hot water supply apparatus as described in any one of Claims 1-7. 前記第一断熱材は、前記端部から張り出すヒレ部を有する真空断熱材であり、
前記第二断熱材の前記位置決め部に接触する前記ヒレ部は、前記貯湯タンク側と反対側に曲げられている請求項１から請求項８のいずれか一項に記載の貯湯式給湯機。 The first heat insulating material is a vacuum heat insulating material having a fin portion protruding from the end,
The hot water storage type hot water supply apparatus according to any one of claims 1 to 8, wherein the fin portion in contact with the positioning portion of the second heat insulating material is bent to the opposite side to the hot water storage tank side. 前記第一断熱材が前記第二断熱材に対して粘着テープにより固定されている請求項１から請求項９のいずれか一項に記載の貯湯式給湯機。   The hot water storage type hot water supply apparatus according to any one of claims 1 to 9, wherein the first heat insulating material is fixed to the second heat insulating material by an adhesive tape.
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