JP2016142479A

JP2016142479A - Hot water storage type water heater

Info

Publication number: JP2016142479A
Application number: JP2015019523A
Authority: JP
Inventors: 広貴志賀; Hiroki Shiga; 佐々木　勝; Masaru Sasaki; 勝佐々木; 快佐藤; Kai Sato
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 2015-02-03
Filing date: 2015-02-03
Publication date: 2016-08-08
Anticipated expiration: 2035-02-03
Also published as: JP6387309B2

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of sufficiently assuring heat insulation capacity while workability at the time of fixing heat insulation material is being assured.SOLUTION: There is provided a vacuum heat insulation material 50 that is divided into substantially circular arc-shaped two vacuum heat insulation material pieces 51, 52 to cover an outer periphery of a can body 2 and there is provided a foamed heat insulation material 60 divided into substantially circular arc-shaped two vacuum heat insulation material pieces 55, 56 to cover an outer periphery part of the vacuum heat insulation material 50. Two vacuum heat insulation material pieces 51, 52 are arranged to form overlapping parts OP1, OP2 where both peripheral ends are overlapped to each other in a radial direction. Then, a peripheral position of each of the two overlapping parts OP1, OP2 is coincided with peripheral positions of the abutting portions S1, S2 where the two foamed heat insulation material pieces 55, 56 are abutted to each other in a peripheral direction, thereby a sufficient heat insulation performance can be assured while the workability at the time of fixing the heat insulation material is being assured.SELECTED DRAWING: Figure 4

Description

この発明は、給湯用の湯水を貯湯する缶体の外周部に断熱材を設けた貯湯式給湯機に関するものである。 The present invention relates to a hot water storage type hot water heater in which a heat insulating material is provided on an outer peripheral portion of a can body for storing hot water for hot water supply.

従来よりこの種の貯湯式給湯機においては、特許文献１に記載のように、略円筒形の缶体（貯湯タンク）の径方向外周部に真空断熱材を設け、その真空断熱材のさらに径方向外周部に発泡断熱材（外周部断熱材）を設けたものがあった。 Conventionally, in this type of hot water storage type hot water heater, as described in Patent Document 1, a vacuum heat insulating material is provided in the radially outer peripheral portion of a substantially cylindrical can (hot water storage tank), and the diameter of the vacuum heat insulating material is further increased. There existed what provided the foam heat insulating material (outer peripheral part heat insulating material) in the direction outer peripheral part.

特開２０１３−２４４６４号公報JP 2013-24464 A

ところでこの従来のものでは、前記真空断熱材についても前記発泡断熱材についても、前記略円筒形の缶体の周方向全周を覆うような、横断面略円環形状となっている。ここで、取り付け時の作業性を向上するために、缶体の外周部に取り付けられる真空断熱材を、横断面略円弧状の２つの真空断熱材片に分割する構造が考えられる。同様に、真空断熱材の外周部に取り付けられる発泡断熱材も、取り付け時の作業性を向上するために、横断面略円弧状の２つの発泡断熱材片に分割する構造が考えられる。 By the way, in this conventional one, both the vacuum heat insulating material and the foam heat insulating material have a substantially circular shape in cross section so as to cover the entire circumference of the substantially cylindrical can body. Here, in order to improve the workability at the time of attachment, the structure which divides | segments the vacuum heat insulating material attached to the outer peripheral part of a can body into two vacuum heat insulating material pieces of a cross-section substantially circular arc shape can be considered. Similarly, the foam heat insulating material attached to the outer peripheral portion of the vacuum heat insulating material can be divided into two foam heat insulating material pieces having a substantially arc-shaped cross section in order to improve workability during attachment.

しかし、真空断熱材及び発泡断熱材を単純に前記のような２分割構造とした場合、構造上、２つの断熱材片どうし周方向に互いに突き合わされる突き合わせ部が生じ、そのままでは、真空断熱材片どうしの前記突き合わせ部及び発泡断熱材片どうしの前記突き合わせ部を介し缶体の熱が放熱することで、保温性能が低下するという問題があった。 However, when the vacuum heat insulating material and the foam heat insulating material are simply made into the two-part structure as described above, due to the structure, a butt portion that is abutted with each other in the circumferential direction is generated between the two heat insulating material pieces. There was a problem that the heat retention performance deteriorated because the heat of the can body radiated through the abutting portions of the pieces and the abutting portions of the foamed heat insulating pieces.

上記問題を解決するために、本発明の請求項１では、加熱手段で加熱された湯水を内部に貯湯する、略円筒形の缶体と、前記缶体の径方向外周部を覆うように設けられ、横断面略円弧状の２つの真空断熱材片に分割された真空断熱材と、前記真空断熱材の径方向外周部を覆うように設けられ、横断面略円弧状の２つの発泡断熱材片に分割された発泡断熱材とを有する貯湯式給湯機において、前記２つの真空断熱材片を、周方向両端部どうしが互いに径方向に重なる２つのオーバーラップ部を形成するように配置し、前記２つのオーバーラップ部それぞれの周方向位置を、前記２つの発泡断熱材片が互いに周方向に突き合わされる突き合わせ部の周方向位置と一致させたものである。 In order to solve the above-mentioned problem, in claim 1 of the present invention, a substantially cylindrical can body for storing hot water heated by a heating means and a radially outer peripheral portion of the can body are provided. A vacuum heat insulating material divided into two vacuum heat insulating material pieces having a substantially arc-shaped cross section, and two foam heat insulating materials provided so as to cover a radially outer peripheral portion of the vacuum heat insulating material. In the hot water storage type hot water heater having a foam heat insulating material divided into pieces, the two vacuum heat insulating material pieces are arranged so as to form two overlapping portions in which circumferential end portions overlap each other in the radial direction, The circumferential position of each of the two overlapping portions is made to coincide with the circumferential position of the butted portion where the two foamed heat insulating material pieces are butted against each other in the circumferential direction.

また、請求項２では、前記２つの真空断熱材片は、前記缶体の前面側に配置される第１断熱材片と、前記缶体の背面側に配置される第２断熱材片とを含み、前記２つのオーバーラップ部のうち一方のオーバーラップ部では、前記第１断熱材片が第２断熱材片の径方向外側において径方向に重なり、前記２つのオーバーラップ部のうち他方のオーバーラップ部では、前記第２断熱材片が第１断熱材片の径方向外側において径方向に重なるものである。 Further, in claim 2, the two vacuum heat insulating material pieces include a first heat insulating material piece arranged on the front surface side of the can body and a second heat insulating material piece arranged on the back surface side of the can body. The first heat insulating material piece overlaps in the radial direction outside the second heat insulating material piece in one of the two overlap portions, and the other of the two overlap portions overlaps. In the wrap portion, the second heat insulating material piece overlaps in the radial direction on the radially outer side of the first heat insulating material piece.

また、請求項３では、前記第１断熱材片及び前記第２断熱材片は、それぞれ、略真空状態の内部に所定の芯材が充填された袋部と、前記袋部の外周側に位置する耳部とを備えており、かつ、前記第１断熱材片及び前記第２断熱材片は、いずれの前記オーバーラップ部においても、前記耳部が前記袋部の径方向外側に折りたたまれつつ、互いに径方向に重なっているものである。 Moreover, in Claim 3, the said 1st heat insulating material piece and the said 2nd heat insulating material piece are respectively located in the bag part by which the predetermined | prescribed core material was filled inside the substantially vacuum state, and the outer peripheral side of the said bag part. And the first heat insulating piece and the second heat insulating piece are being folded outwardly in the radial direction of the bag portion in any of the overlap portions. , Which overlap each other in the radial direction.

また、請求項４では、前記２つの発泡断熱材片のそれぞれは、前記第１断熱材片及び前記第２断熱材片のうち、各オーバーラップ部において径方向外側に位置する断熱材片の、横断面略直線状に延びる周方向端部を収納する、収納部を備えるものである。 Further, in claim 4, each of the two foamed heat insulating material pieces is a heat insulating material piece located radially outward in each overlap portion of the first heat insulating material piece and the second heat insulating material piece. A storage section is provided for storing a circumferential end that extends substantially linearly in cross section.

また、請求項５では、前記収納部は、各発泡断熱材片の径方向内周面に、横断面略矩形形状で備えられているものである。 Moreover, in Claim 5, the said accommodating part is provided with the cross-sectional substantially rectangular shape in the radial direction internal peripheral surface of each foam heat insulating material piece.

また、請求項６では、前記２つの発泡断熱材片のそれぞれは、前記第１断熱材片及び前記第２断熱材片のうち、各オーバーラップ部において径方向外側に位置する断熱材片が当該オーバーラップ部外で径方向内側へ戻るように曲折する曲折部に倣う、曲面部を備えるものである。 Further, in claim 6, each of the two foamed heat insulating material pieces is a heat insulating material piece positioned radially outward in each overlap portion of the first heat insulating material piece and the second heat insulating material piece. It is provided with a curved surface portion that follows a bent portion that is bent so as to return to the inside in the radial direction outside the overlap portion.

また、請求項７では、前記曲面部は、各発泡断熱材片の径方向内周面に、横断面略円弧形状で備えられているものである。 Moreover, in Claim 7, the said curved surface part is provided in the radial direction inner peripheral surface of each foam heat insulating material piece by the cross-section substantially circular arc shape.

また、請求項８では、前記２つの発泡断熱材片のそれぞれは、前記オーバーラップ部の径方向外側で、前記突き合わせ部において互いに係合する係合段付き部を、周方向両端部に備えるものである。 Further, according to claim 8, each of the two foamed heat insulating material pieces includes an engagement stepped portion that engages with each other at the abutting portion at the both ends in the circumferential direction on the radially outer side of the overlap portion. It is.

また、請求項９では、前記２つの真空断熱材片による前記オーバーラップ部の周方向寸法を、前記突き合わせ部の周方向寸法より大きくしたものである。 Moreover, in Claim 9, the circumferential direction dimension of the said overlap part by said two vacuum heat insulating material pieces is made larger than the circumferential direction dimension of the said abutting part.

この発明の請求項１によれば、内部に湯水を貯湯するのに用いられる略円筒形の缶体の径方向外周部に保温用の真空断熱材が設けられ、その真空断熱材のさらに径方向外周部に発泡断熱材が設けられる。このとき、缶体への取り付け時の作業性を向上するために、真空断熱材は横断面略円弧状の２つの真空断熱材片に分割された構造となっている。この結果、そのままでは、真空断熱材片どうしの突き合わせ部から缶体の熱が放熱することで、保温性能が低下するおそれがある。 According to Claim 1 of this invention, the vacuum heat insulating material for heat insulation is provided in the radial direction outer peripheral part of the substantially cylindrical can used for storing hot water inside, and the radial direction of the vacuum heat insulating material further A foam heat insulating material is provided on the outer peripheral portion. At this time, in order to improve workability at the time of attachment to the can body, the vacuum heat insulating material has a structure divided into two vacuum heat insulating material pieces having a substantially circular cross section. As a result, as it is, the heat retaining performance may be deteriorated due to the heat of the can body radiating from the abutting portion between the vacuum heat insulating pieces.

そこで、請求項１によれば、前記２つの真空断熱材片を缶体の外周部に配置する際、周方向両端部どうしを互いに径方向に重ねるようにしてオーバーラップ部を形成する。これにより、真空断熱材片どうしの間に隙間がなくなるので、上記放熱を防止することができる。 Therefore, according to the first aspect, when the two vacuum heat insulating material pieces are arranged on the outer peripheral portion of the can body, the overlap portion is formed such that the two circumferential end portions overlap each other in the radial direction. Thereby, since there is no gap between the vacuum heat insulating material pieces, the heat dissipation can be prevented.

一方、前記真空断熱材と同様、取り付け時の作業性を向上するために、発泡断熱材も横断面略円弧状の２つの発泡断熱材片に分割された構造となっている。このとき、前記のようにオーバーラップ部では真空断熱材片が径方向に二重に重なって十分な断熱性能を果たすようになっている。そして、前記２つの発泡断熱材片を真空断熱材の外周部に配置する際、それらが突き合わされる突き合わせ部の周方向位置を、前記オーバーラップ部の周方向位置と一致させる（言い替えれば、真空断熱材片のオーバーラップ部の径方向外側に、発泡断熱材片の突き合わせ部を設ける）。このようにして、既に真空断熱材によって十分な保温性能が確保されている部位に発泡断熱材片の突き合わせ部を配置することで、缶体から外部へ向かう放熱量を減少させ、給湯機全体として十分な保温性能を確保することができる。以上の結果、請求項１によれば、断熱材の取り付け時の作業性を確保しつつ、十分な保温性能を確保することができる。 On the other hand, in the same manner as the vacuum heat insulating material, the foamed heat insulating material is divided into two foamed heat insulating material pieces having a substantially arc-shaped cross section in order to improve workability at the time of attachment. At this time, as described above, in the overlap portion, the vacuum heat insulating material pieces are doubled in the radial direction so that sufficient heat insulating performance is achieved. And when arrange | positioning the said 2 foam insulation material pieces in the outer peripheral part of a vacuum heat insulating material, the circumferential direction position of the butting | matching part by which they are abutted is made to correspond with the circumferential direction position of the said overlap part (in other words, vacuum A butt portion of the foam heat insulating material piece is provided on the radially outer side of the overlap portion of the heat insulating material piece). In this way, by disposing the butted part of the foam insulation material at the part where sufficient heat insulation performance has already been secured by the vacuum insulation material, the amount of heat released from the can body to the outside is reduced, and the entire water heater Sufficient heat retention performance can be ensured. As a result, according to the first aspect, it is possible to ensure sufficient heat retaining performance while ensuring workability when the heat insulating material is attached.

また、請求項２によれば、真空断熱材の２つの断熱材片について、一方のオーバーラップ部では内側に第２断熱材片、外側に第１断熱材片の重なり状態とし、他方のオーバーラップ部では内側に第１断熱材片、外側に第２断熱材片の重なり状態とする。この結果、第１断熱材片及び第２断熱材片に対し、缶体の熱を内側で一次的に遮熱する機能とその外側で二次的に遮熱する機能とを両オーバーラップ部においてそれぞれ均等に振り分け、分担することができる。 Further, according to claim 2, with respect to the two heat insulating material pieces of the vacuum heat insulating material, in one overlap portion, the second heat insulating material piece is overlapped inside and the first heat insulating material piece is overlapped outside, and the other overlap is formed. In the portion, the first heat insulating material piece is placed on the inner side, and the second heat insulating material piece is placed on the outer side. As a result, with respect to the first heat insulating material piece and the second heat insulating material piece, the function of primarily blocking the heat of the can body on the inner side and the function of secondarily blocking the heat on the outer side in both overlap portions. Each can be equally distributed and shared.

また、請求項３によれば、袋部のほかに耳部を備える真空断熱材片が用いられる場合であっても、確実にオーバーラップ部を構築することができる。また、各断熱材片において、耳部を袋部の径方向外側に折りたたんで配置することにより、さらに確実にオーバーラップ部における遮熱効果を得ることができる。 Moreover, according to Claim 3, even if it is a case where the vacuum heat insulating material piece provided with an ear | edge part other than a bag part is used, an overlap part can be constructed | assembled reliably. Moreover, in each heat insulating material piece, the thermal insulation effect in an overlap part can be more reliably acquired by folding and arrange | positioning an ear | edge part on the radial direction outer side of a bag part.

また、請求項４によれば、各オーバーラップ部において径方向外側に位置する断熱材片の周方向端部を、収納部によって収納し、確実に位置決めしつつ保持することができる。 According to the fourth aspect of the present invention, the circumferential end of the heat insulating material piece positioned radially outward in each overlap portion can be stored by the storage portion and held while being reliably positioned.

また、請求項５によれば、横断面略直線状に延びる周方向端部を、横断面略矩形形状の収納部によって、確実にフィットさせつつ安定的に保持することができる。 According to the fifth aspect of the present invention, the circumferential end extending in a substantially linear cross section can be stably held while being securely fitted by the storage section having a substantially rectangular cross section.

また、請求項６によれば、各オーバーラップ部において径方向外側に位置しオーバーラップ部外で径方向内側へと戻る、断熱材片の曲折部を、曲面部によって確実に位置決めしつつ保持することができる。 According to the sixth aspect of the present invention, the bent portion of the heat insulating material piece that is located radially outward at each overlap portion and returns to the radially inner side outside the overlap portion is held while being reliably positioned by the curved surface portion. be able to.

また、請求項７によれば、曲折しながら径方向内側へと戻る曲折部を、横断面略円弧形状の曲面部によって、確実にフィットさせつつ安定的に保持することができる。 According to the seventh aspect of the present invention, the bent portion that returns to the inner side in the radial direction while being bent can be stably held while being securely fitted by the curved portion having a substantially circular cross section.

また、請求項８によれば、各発泡断熱材片の周方向両端部に設けられた係合段付き部を互いに係合させることで、２つの発泡断熱材片を真空断熱材の径方向外周部に組み付けるときの組み付け性を向上することができる。また、段付き形状とすることで、突き合わせ部を介した放熱に対する遮熱効果もある。 Further, according to claim 8, by engaging the engaging stepped portions provided at both ends in the circumferential direction of each foam heat insulating material piece, the two foam heat insulating material pieces are arranged in the radial outer periphery of the vacuum heat insulating material. The assembling property when assembling to the part can be improved. Moreover, by setting it as a stepped shape, there is also a heat shielding effect against heat dissipation through the butted portion.

また、請求項９によれば、２つの発泡断熱材片の突き合わせ部の周方向寸法（言い替えれば外部に露出する開口寸法）よりも、２つの真空断熱材片どうしのオーバーラップ寸法を大きくすることで、オーバーラップ部において高い断熱性能を確実に得ることができる。 Further, according to claim 9, the overlap dimension between the two vacuum heat insulating material pieces is made larger than the circumferential dimension of the butted portion of the two foam heat insulating material pieces (in other words, the opening size exposed to the outside). Thus, high heat insulation performance can be reliably obtained in the overlap portion.

本発明の一実施形態の貯湯式給湯機の全体概略構成図1 is an overall schematic configuration diagram of a hot water storage type water heater according to an embodiment of the present invention. 缶体及びその周囲構造の詳細を表す分解斜視図Exploded perspective view showing details of can and surrounding structure 図２中の矢印ＩＩＩ方向からの矢視図に相当する模式側面図Schematic side view corresponding to the arrow view from the direction of arrow III in FIG. 缶体の径方向外側における、真空断熱材片及び発泡断熱材片の配置状態を表す、図３中のＩＶ−ＩＶ断面による横断面図The cross-sectional view by the IV-IV cross section in FIG. 3 showing the arrangement | positioning state of the vacuum heat insulating material piece and a foam heat insulating material piece in the radial direction outer side of a can body 真空断熱材及び発泡断熱材を単純に２分割した比較例を表す横断面図Cross-sectional view showing a comparative example in which vacuum insulation material and foam insulation material are simply divided into two parts 発泡断熱材片が係合段付き部を備える変形例における、オーバーラップ部の拡大横断面図The expanded cross-sectional view of the overlap part in the modification in which the foamed heat insulating material piece includes the engagement stepped part. 真空断熱材片が袋部及び耳部を備える変形例における、真空断熱材片の外観を表す側面図、及び、図７（ａ）中のＶＩＩｂ−ＶＩＩｂ断面による横断面図The side view showing the external appearance of the vacuum heat insulating material piece in the modified example in which the vacuum heat insulating material piece includes the bag part and the ear part, and the cross-sectional view by the VIIb-VIIb cross section in FIG. 図７に示す変形例における、オーバーラップ部の拡大横断面図The expanded cross-sectional view of the overlap part in the modification shown in FIG.

次に、本発明の一実施の形態を図１〜図５に基づいて説明する。 Next, an embodiment of the present invention will be described with reference to FIGS.

本実施形態の貯湯式給湯機を備えた貯湯式給湯装置の全体概略構成を図１に示す。図１において、この貯湯式給湯装置１００は、時間帯別契約電力の電力単価が安価な深夜時間帯に湯水を沸き上げて貯湯しこの貯湯した湯水を給湯に用いるもので、湯水を貯湯する缶体２（貯湯タンク）を備えた貯湯タンクユニット１と、缶体２内の湯水を加熱する加熱手段としてのヒートポンプユニット３と、台所や洗面所等にそれぞれ設けられた給湯栓４と、例えば給湯栓４の近傍に設けられた給湯リモコン５と、浴槽６と、を有する。 An overall schematic configuration of a hot water storage type hot water supply apparatus including the hot water storage type hot water supply apparatus of the present embodiment is shown in FIG. In FIG. 1, this hot water storage type hot water supply apparatus 100 is a device for boiling hot water and storing hot water in the midnight hours when the unit price of contracted electric power by time zone is low, and using the hot water stored in the hot water for hot water supply. A hot water storage tank unit 1 provided with a body 2 (hot water storage tank), a heat pump unit 3 as a heating means for heating hot water in the can body 2, a hot water tap 4 provided in a kitchen, a washroom, etc., for example, hot water supply A hot water supply remote controller 5 provided in the vicinity of the stopper 4 and a bathtub 6 are provided.

前記貯湯タンクユニット１は、筐体となる外装ケース（図示省略）の内部に設置される前記缶体２と、缶体２の上部に接続された出湯管１２と、缶体２の下部に接続された給水管１３と、出湯管１２からの高温水と給水管１３から分岐されたバイパス管１４からの低温水とを混合するミキシング弁１５と、ミキシング弁１５の下流に接続された給湯管１６と、給湯管１６から分岐され浴槽６に接続された湯張り管２０と、湯張り管２０の開閉を行う湯張り弁２１と、出湯管１２から分岐するよう接続されて缶体２の過圧を逃す過圧逃し弁２３と、給湯管１６に設けられた給湯温度センサ１７と、給湯管１６に設けられた給湯流量センサ１８と、給水管１３に設けられた給水圧を減圧する減圧弁２４と、給水管１３に設けられた給水温度センサ１９と、湯張り管２０を流れる流量を積算する湯張り流量センサ２２と、マイクロコンピュータを備えてこの貯湯タンクユニット１の各種機器の制御を行う給湯制御部２５とを有する。 The hot water storage tank unit 1 is connected to the can body 2 installed inside an exterior case (not shown) serving as a housing, a hot water pipe 12 connected to the upper portion of the can body 2, and a lower portion of the can body 2. The mixing water supply pipe 13, the mixing valve 15 for mixing the high temperature water from the hot water supply pipe 12 and the low temperature water from the bypass pipe 14 branched from the water supply pipe 13, and the hot water supply pipe 16 connected downstream of the mixing valve 15. A hot water filling pipe 20 branched from the hot water supply pipe 16 and connected to the bathtub 6, a hot water filling valve 21 for opening and closing the hot water filling pipe 20, and an overpressure of the can body 2 connected to branch from the hot water discharge pipe 12. An overpressure relief valve 23 for releasing water, a hot water supply temperature sensor 17 provided in the hot water supply pipe 16, a hot water supply flow rate sensor 18 provided in the hot water supply pipe 16, and a pressure reducing valve 24 for reducing the supply water pressure provided in the water supply pipe 13. And a water supply temperature sensor provided in the water supply pipe 13 With 9, a hot water filling flow sensor 22 integrates the flow rate through the water filling pipe 20, and a hot water supply control unit 25 for controlling the various devices in the hot water storage tank unit 1 includes a microcomputer.

前記缶体２には、上下方向に沿って複数個のサーミスタ２９が配置されている。これらのサーミスタ２９が検出する温度情報によって、缶体２内にどれだけの熱量が残っているかが検知され、さらに缶体２内の上下方向の温度分布が検知される。 In the can body 2, a plurality of thermistors 29 are arranged along the vertical direction. Based on the temperature information detected by these thermistors 29, it is detected how much heat is left in the can body 2, and further the temperature distribution in the vertical direction in the can body 2 is detected.

前記缶体２と前記ヒートポンプユニット３とは、湯水を循環させるヒーポン往き管２６及びヒーポン戻り管２７からなる加熱循環回路２８により接続されている。前記ヒートポンプユニット３は、ヒートポンプ回路３４と、ヒーポン循環ポンプ３６と、それらの駆動を制御するヒーポン制御部３９とを備えている。前記ヒートポンプ回路３４は、二酸化炭素冷媒を圧縮する圧縮機３０と、凝縮器としての冷媒−水熱交換器３１と、電子膨張弁３２と、強制空冷式の蒸発器３３とで構成されている。前記加熱循環回路２８の冷媒−水熱交換器３１入口側には、冷媒−水熱交換器３１に流入する湯水の温度を検出する熱交入口温度センサ３７が設けられ、加熱循環回路２８の冷媒−水熱交換器３１出口側には、冷媒−水熱交換器３１から流出する湯水の温度を検出する熱交出口温度センサ３８が設けられている。 The can body 2 and the heat pump unit 3 are connected to each other by a heating circulation circuit 28 including a heat pump forward pipe 26 and a heat pump return pipe 27 for circulating hot water. The heat pump unit 3 includes a heat pump circuit 34, a heat pump circulation pump 36, and a heat pump control unit 39 that controls driving of the heat pump circuit 34. The heat pump circuit 34 includes a compressor 30 that compresses carbon dioxide refrigerant, a refrigerant-water heat exchanger 31 as a condenser, an electronic expansion valve 32, and a forced air-cooled evaporator 33. A heat entrance temperature sensor 37 for detecting the temperature of hot water flowing into the refrigerant-water heat exchanger 31 is provided on the inlet side of the refrigerant-water heat exchanger 31 of the heating circuit 28. On the outlet side of the water heat exchanger 31, a heat exchange outlet temperature sensor 38 that detects the temperature of hot water flowing out from the refrigerant-water heat exchanger 31 is provided.

前記給湯リモコン５には、給湯設定温度を設定する給湯温度設定スイッチ４０と、ふろ設定温度を設定するふろ温度設定スイッチ４２と、前記ふろ設定温度の湯を湯張り量設定スイッチ４１で設定された湯張り量だけ浴槽６へ湯張りして所定時間保温させるふろ自動スイッチ４３と、適宜の表示を行う表示部４５と、マイクロコンピュータを備え前記給湯制御部２５と通信を行うリモコン制御部（図示せず）と、を備えている。 The hot water supply remote controller 5 is set with a hot water supply temperature setting switch 40 for setting a hot water supply set temperature, a bath temperature setting switch 42 for setting a bath set temperature, and hot water at the bath set temperature by a hot water filling amount setting switch 41. A bath automatic switch 43 that fills the bathtub 6 by the amount of hot water and keeps it warm for a predetermined time, a display unit 45 that displays an appropriate display, and a remote control unit that includes a microcomputer and communicates with the hot water supply control unit 25 (not shown). And).

次に、図２及び図３を用いて、前記缶体２及びその周囲構造の詳細について説明する。なお、図示の煩雑を避けるために、缶体２に接続される各種配管及び前記外装ケース等は省略している。また、以下の説明において、上下方向、前後方向、左右方向は、図２等の各図中に適宜示す矢印方向に対応している。この図２において、缶体２は全体が略円筒形に形成された金属製の中空缶であり、その周囲に、缶体２の径方向外周部をほぼ全周にわたって覆う真空断熱材５０と、この真空断熱材５０を含めた缶体２全体を覆う発泡断熱材６０と、発泡断熱材６０で覆われた缶体２を上部に載置するベース部５７と、が設けられている。 Next, the details of the can 2 and the surrounding structure will be described with reference to FIGS. In addition, in order to avoid the complexity of illustration, the various pipes connected to the can 2 and the outer case are omitted. Moreover, in the following description, the up-down direction, the front-rear direction, and the left-right direction correspond to the arrow directions appropriately shown in each drawing such as FIG. In FIG. 2, the can body 2 is a metal hollow can that is formed in a substantially cylindrical shape as a whole, and a vacuum heat insulating material 50 covering the outer periphery in the radial direction of the can body 2 over substantially the entire periphery thereof, A foam heat insulating material 60 that covers the entire can body 2 including the vacuum heat insulating material 50 and a base portion 57 on which the can body 2 covered with the foam heat insulating material 60 is placed are provided.

真空断熱材５０は、前方側（言い換えれば前記缶体２の前面側）に位置する真空断熱材片５１（第１断熱材片）と、後方側（言い換えれば前記缶体２の背面側）に位置する真空断熱材片５２（第２断熱材片）とに２分割された構造となっている。各真空断熱材片５１，５２は、例えばアルミフィルムの袋体の内部にグラスウールを芯材として充填させた上でほぼ真空状態とした構造体であり、例えば平板状形状の断熱材母材をロール加工されることによって全体が概ね略半円筒形（横断面略円弧状）に形成されている。そして、図示する例では、前方側真空断熱材片５１及び後方側真空断熱材片５２は、缶体２の径方向外側表面に対して、それぞれ対向する略１８０°の範囲（詳細には１８０°よりも若干大きい角度。後述の図５４等参照）を覆っている。また、各真空断熱材片５１，５２は、例えばポリプロピレンフィルムからなるテープ等、適宜の固定具によって缶体２に固定されている（煩雑防止のために図示省略）。 The vacuum heat insulating material 50 has a vacuum heat insulating material piece 51 (first heat insulating material piece) located on the front side (in other words, the front surface side of the can body 2) and a rear side (in other words, the back surface side of the can body 2). It has a structure that is divided into two vacuum heat insulating material pieces 52 (second heat insulating material pieces). Each of the vacuum heat insulating material pieces 51 and 52 is a structure in which, for example, an aluminum film bag body is filled with glass wool as a core material and is almost in a vacuum state. For example, a flat heat insulating base material is rolled. By being processed, the whole is formed in a substantially semi-cylindrical shape (substantially arcuate in cross section). In the illustrated example, the front-side vacuum heat insulating material piece 51 and the rear-side vacuum heat insulating material piece 52 are in a substantially 180 ° range (specifically, 180 ° in detail) facing the radially outer surface of the can body 2. A slightly larger angle (see FIG. 54 and the like described later). Moreover, each vacuum heat insulating material piece 51 and 52 is being fixed to the can 2 with suitable fixing tools, such as a tape which consists of polypropylene films, for example (illustration omitted for the sake of a complication prevention).

発泡断熱材片６０は、前記缶体２の上面を覆うよう略半球形に形成された上部発泡断熱材片５３と、前記缶体２の下面を覆うよう略半球形に形成された下部発泡断熱材片５４と、前記缶体２の径方向外側表面に対してそれぞれ対向する１８０°の範囲（詳細には１８０°よりも若干小さい角度。後述の図５４等参照）で覆うよう略半円筒形（横断面略円弧状）に形成された前方側発泡断熱材片５５及び後方側真空断熱材片５６とに、４分割された構造となっている。各発泡断熱材片５３〜５６は、機械的な剛性を有する材料（例えば耐熱性発泡ポリスチレン）からなる成形品である。なお、図中では、前記下部発泡断熱材片５４は前記ベース部５７と一体に設けられているものである。また、前記前方側・後方側発泡断熱材片５５，５６の内径は、（後述のオーバーラップ部ＯＰ１，ＯＰ２を除き）缶体２の外周表面を覆った前記真空断熱材片５１，５２の外径と略同じとなるように設定されており、前記前方側・後方側発泡断熱材片５５，５６は、前記真空断熱材片５１，５２の径方向外周部を（後述の突き合わせ部Ｓ１，Ｓ２を除き）ほぼ全周にわたって覆う。 The foam heat insulating material piece 60 includes an upper foam heat insulating material piece 53 formed in a substantially hemispherical shape so as to cover the upper surface of the can body 2 and a lower foam heat insulating material formed in a substantially hemispherical shape so as to cover the lower surface of the can body 2. A substantially semi-cylindrical shape so as to cover the material piece 54 and a range of 180 ° facing the radially outer surface of the can body 2 (specifically, an angle slightly smaller than 180 °; see FIG. 54 and the like described later). The front side foam insulation material piece 55 and the rear side vacuum insulation material piece 56 formed in a (circular cross-section substantially arc shape) are divided into four parts. Each of the foam heat insulating material pieces 53 to 56 is a molded product made of a material having mechanical rigidity (for example, heat resistant foamed polystyrene). In the drawing, the lower foam heat insulating material piece 54 is provided integrally with the base portion 57. Further, the inner diameters of the front and rear foam insulation pieces 55 and 56 are outside the vacuum insulation pieces 51 and 52 covering the outer peripheral surface of the can body 2 (except for the overlap portions OP1 and OP2 described later). The front and rear foam insulation pieces 55, 56 are set to be radially outer peripheral portions of the vacuum insulation pieces 51, 52 (butting portions S1, S2 described later). (Excluding) Cover almost the entire circumference.

以上の基本構成を備える貯湯式給湯装置１００における、前記前方側発泡断熱材片５５、前記後方側発泡断熱材片５６、前記前方側真空断熱材片５１、及び前記後方側真空断熱材片５２の配置構造詳細について、図４を用いて説明する。なお、図４においては、図示の煩雑防止のために、缶体２は外形のみを想像線で略示している（後述の図５も同様）。 In the hot water storage type hot water supply apparatus 100 having the above basic configuration, the front side foam heat insulating material piece 55, the rear side foam heat insulating material piece 56, the front side vacuum heat insulating material piece 51, and the rear side vacuum heat insulating material piece 52 are provided. Details of the arrangement structure will be described with reference to FIG. In FIG. 4, only the outer shape of the can body 2 is schematically indicated by an imaginary line in order to prevent the illustrated trouble (the same applies to FIG. 5 described later).

図４に示すように、前記前方側真空断熱材片５１及び前記後方側真空断熱材片５２は、周方向両端部どうしが互いに径方向に重なる、図示右側に位置するオーバーラップ部ＯＰ１及び図示左側に位置するオーバーラップ部ＯＰ２を形成するように、配置されている。 As shown in FIG. 4, the front-side vacuum heat insulating material piece 51 and the rear-side vacuum heat insulating material piece 52 are overlapped with each other in the radial direction at both ends in the circumferential direction. It is arranged so as to form an overlap portion OP2 located at the position.

すなわち、前方側真空断熱材片５１は、周方向一方側（図示右側の前記オーバーラップ部ＯＰ１側）の末端部が径方向外側に湾曲した形状となっており、その末端部近傍において横断面略直線状に延びる端部５１ａ（周方向端部）と、前記端部５１ａの周方向他方側（前記オーバーラップ部ＯＰ２側）に連設され前記オーバーラップ部ＯＰ１外で径方向内側へ戻るように曲折する曲折部５１ｂと、を備えている。なお、前記前方側真空断熱材片５１のうち端部５１ａ及び曲折部５１ｂ以外の部分は、略円環形状の中間部５１ｄとなっている。同様に、後方側真空断熱材片５２も、周方向一方側（図示左側の前記オーバーラップ部ＯＰ２側）の末端部が径方向外側に湾曲した形状となっており、その末端部近傍において横断面略直線状に延びる端部５２ａ（周方向端部）と、前記端部５２ａの周方向他方側（前記オーバーラップ部ＯＰ１側）に連設され前記オーバーラップ部ＯＰ２外で径方向内側へ戻るように曲折する曲折部５２ｂと、を備えている。なお、前記後方側真空断熱材片５２のうち端部５２ａ及び曲折部５２ｂ以外の部分は、略円環形状の中間部５２ｄとなっている。 That is, the front-side vacuum heat insulating material piece 51 has a shape in which a distal end portion on one side in the circumferential direction (the overlapped portion OP1 side on the right side in the drawing) is curved radially outward, and has a substantially transverse cross section in the vicinity of the distal end portion. A linearly extending end 51a (circumferential end) and the other end of the end 51a in the circumferential direction (on the overlap part OP2 side) are connected to the outside in the radial direction outside the overlap part OP1. A bent portion 51b that bends. In addition, parts other than the edge part 51a and the bending part 51b among the said front side vacuum heat insulating material pieces 51 become the substantially annular | circular shaped intermediate part 51d. Similarly, the rear-side vacuum heat insulating material piece 52 also has a shape in which the end portion on one side in the circumferential direction (the overlap portion OP2 side on the left side in the drawing) is curved radially outward, and has a transverse cross section in the vicinity of the end portion. An end 52a (circumferential end) extending substantially linearly and the other end in the circumferential direction (the overlap portion OP1 side) of the end 52a are connected to the outside in the radial direction outside the overlap portion OP2. And a bent portion 52b that is bent. In addition, the part other than the edge part 52a and the bending part 52b among the said back side vacuum heat insulating material pieces 52 becomes the substantially annular | circular shaped intermediate part 52d.

前記オーバーラップ部ＯＰ１においては、前記前方側真空断熱材片５１の前記端部５１ａが、前記後方側真空断熱材片５２の周方向他方側の端部５２ｃの、径方向外側に重なっている。同様に、前記オーバーラップ部ＯＰ２においては、前記後方側真空断熱材片５２の前記端部５２ａが、前記前方側真空断熱材片５１の周方向他方側の端部５１ｃの、径方向外側に重なっている。 In the overlap portion OP <b> 1, the end portion 51 a of the front-side vacuum heat insulating material piece 51 overlaps the radially outer side end portion 52 c of the rear-side vacuum heat insulating material piece 52. Similarly, in the overlap part OP <b> 2, the end 52 a of the rear vacuum heat insulating material piece 52 overlaps the radially outer end 51 c of the front side vacuum heat insulating material piece 51. ing.

また、前記前方側発泡断熱材片５５及び前記後方側発泡断熱材片５６は、周方向両端部どうしが互いに突き合わされる２つの突き合わせ部（図示右側の突き合わせ部Ｓ１及び図示左側の突き合わせ部Ｓ２）を形成するように、配置される。 Further, the front side foam insulation material piece 55 and the rear side foam insulation material piece 56 have two abutting parts (abutting part S1 on the right side and abutting part S2 on the left side in the figure) where both ends in the circumferential direction abut each other. Are arranged to form

すなわち、前方側発泡断熱材片５５の周方向一方側（図示右側の前記オーバーラップ部ＯＰ１側）の端部５５ｄと、前記後方側発泡断熱材片５６の周方向他方側の（図示右側の前記オーバーラップ部ＯＰ１側）の端部５６ｄとの間に、前記突き合わせ部Ｓ１が形成され、この突き合わせ部Ｓ１の周方向位置は、前記オーバーラップ部ＯＰ１の周方向位置と一致している。このとき、前記後方側発泡断熱材片５６の前記端部５６ｅの近傍の内周面には、前記オーバーラップ部ＯＰ１において径方向外側に位置している前記前方側真空断熱材片５１の前記端部５１ａを収納する、横断面略矩形形状の収納部５６ａが備えられている。また、前記前方側発泡断熱材片５５の前記端部５５ｄの近傍の内周面には、前記前方側真空断熱材片５１の前記曲折部５１ｂに倣う曲面部５５ｂが、横断面略円弧形状で備えられている。 That is, one end 55d of the front side foam insulation material piece 55 in the circumferential direction (the overlap part OP1 side on the right side in the figure) and the other side in the circumferential direction of the rear side foam insulation material piece 56 (the right side in the figure above). The butted portion S1 is formed between the end portion 56d on the overlap portion OP1 side, and the circumferential position of the butted portion S1 coincides with the circumferential position of the overlap portion OP1. At this time, the end of the front side vacuum heat insulating material piece 51 located on the radially outer side in the overlap portion OP1 is formed on the inner peripheral surface in the vicinity of the end portion 56e of the rear side foam heat insulating material piece 56. An accommodating portion 56a having a substantially rectangular cross section is provided for accommodating the portion 51a. Further, on the inner peripheral surface in the vicinity of the end portion 55d of the front side foam heat insulating material piece 55, a curved surface portion 55b following the bent portion 51b of the front side vacuum heat insulating material piece 51 has a substantially circular arc cross section. Is provided.

また、前方側発泡断熱材片５５の周方向他方側（図示左側の前記オーバーラップ部ＯＰ２側）の端部５５ｅと、前記後方側発泡断熱材片５６の周方向他方側の（図示左側の前記オーバーラップ部ＯＰ２側）の端部５６ｄとの間に、前記突き合わせ部Ｓ２が形成され、この突き合わせ部Ｓ２の周方向位置は、前記オーバーラップ部Ｓ２の周方向位置と一致している。このとき、前記前方側発泡断熱材片５５の前記端部５５ｅの近傍の内周面には、前記オーバーラップ部ＯＰ２において径方向外側に位置している前記後方側真空断熱材片５２の前記端部５２ａを収納する、横断面略矩形形状の収納部５５ａが備えられている。また、前記後方側発泡断熱材片５６の前記端部５６ｄの近傍の内周面には、前記後方側真空断熱材片５２の前記曲折部５２ｂに倣う曲面部５６ｂが、横断面略円弧形状で備えられている。 In addition, the end 55e on the other circumferential side of the front side foam insulation material piece 55 (on the left side in the overlap portion OP2 side in the figure) and the other circumferential side of the rear side foam insulation material piece 56 (on the left side in the figure on the left side). The abutting portion S2 is formed between the end portion 56d on the overlapping portion OP2 side, and the circumferential position of the abutting portion S2 coincides with the circumferential position of the overlapping portion S2. At this time, the end of the back side vacuum heat insulating material piece 52 located on the radially outer side in the overlap portion OP2 is formed on the inner peripheral surface in the vicinity of the end portion 55e of the front side foam heat insulating material piece 55. An accommodating portion 55a having a substantially rectangular cross section is provided for accommodating the portion 52a. Further, on the inner peripheral surface in the vicinity of the end portion 56d of the rear side foam heat insulating material piece 56, a curved surface portion 56b following the bent portion 52b of the rear side vacuum heat insulating material piece 52 has a substantially circular arc cross section. Is provided.

なお、前記のようなオーバーラップ部ＯＰ１，ＯＰ２の構成において、オーバーラップ部ＯＰ１，ＯＰ２それぞれの周方向寸法である長さＬは、前記突き合わせ部Ｓ１，Ｓ２の周方向寸法である間隙Ｍよりも大きくなっている。なお、構造の明確化のために、図４及びその他の各図においては、突き合わせ部Ｓ１，Ｓ２の広がりを大きく誇張して図示しているが、実際は、これら突き合わせ部Ｓ１，Ｓ２は、発泡断熱材を前記前方側発泡断熱材片５５及び前記後方側発泡断熱材片５６の２分割構造とする必要性からやむなく生じるものであって、比較的小さいものである（すなわち前記間隙Ｍの大きさは比較的小さい）。但し、オーバーラップ部ＯＰ１，ＯＰ２における真空断熱材片５１，５２の重なりにより十二分な断熱性能を確保できる場合には、前記突き合わせ部Ｓ１，Ｓ２の広がりを比較的大きくとる（前記間隙Ｍを比較的大きくする）ようにしてもよい。 In the configuration of the overlap portions OP1 and OP2 as described above, the length L that is the circumferential dimension of each of the overlap portions OP1 and OP2 is larger than the gap M that is the circumferential dimension of the butted portions S1 and S2. It is getting bigger. For clarity of the structure, in FIG. 4 and other figures, the spread of the butted portions S1 and S2 is greatly exaggerated. However, in reality, these butted portions S1 and S2 are foam insulation. The material is inevitably generated from the necessity of a two-part structure of the front foam insulation material piece 55 and the rear foam insulation material piece 56, and is relatively small (that is, the size of the gap M is Relatively small). However, when sufficient heat insulation performance can be ensured by the overlap of the vacuum heat insulating material pieces 51 and 52 in the overlap portions OP1 and OP2, the butt portions S1 and S2 are made relatively wide (the gap M is set to be larger). May be relatively large).

以上のように構成した本実施形態では、略円筒形の缶体２の径方向外周部に真空断熱材５０が設けられる。このとき、真空断熱材５０を前記２つの真空断熱材片（前方側真空断熱材片５１及び後方側真空断熱材片５２）への分割構造とすることで、缶体２への取り付け時の作業性を向上することができる。また、前記真空断熱材５０のさらに径方向外周部には発泡断熱材６０が設けられる。このとき、発泡断熱材６０のうち前記径方向外周部の部分を、前記２つの発泡断熱材片（前方側発泡断熱材片５５及び後方側発泡断熱材片５６）への分割構造とすることで、前記同様、真空断熱材５０の外周部へ取り付ける時の作業性を向上することができる。 In the present embodiment configured as described above, the vacuum heat insulating material 50 is provided on the radially outer peripheral portion of the substantially cylindrical can body 2. At this time, the vacuum heat insulating material 50 is divided into the two vacuum heat insulating material pieces (the front-side vacuum heat-insulating material piece 51 and the rear-side vacuum heat-insulating material piece 52), so that the work at the time of attachment to the can body 2 is performed. Can be improved. Further, a foam heat insulating material 60 is provided on the radially outer peripheral portion of the vacuum heat insulating material 50. At this time, the part of the said radial direction outer peripheral part among the foam heat insulating materials 60 is made into the division structure to the said two foam heat insulating material pieces (The front side foam heat insulating material piece 55 and the back side foam heat insulating material piece 56). Like the above, workability | operativity at the time of attaching to the outer peripheral part of the vacuum heat insulating material 50 can be improved.

しかしながら、前記のように真空断熱材５０や発泡断熱材６０を単純に２分割構造とした場合には、図４に対応する図５に示す比較例のように、そのままでは、真空断熱材片５１，５２どうしの突き合わせ部及び発泡断熱材片５５，５６どうしの突き合わせ部から缶体の熱が放熱し（矢印ア，イ参照）、保温性能が低下するおそれがある。 However, when the vacuum heat insulating material 50 and the foam heat insulating material 60 are simply divided into two as described above, the vacuum heat insulating material piece 51 is left as it is, as in the comparative example shown in FIG. 5 corresponding to FIG. , 52 and the thermal insulation of the foam heat insulating material pieces 55, 56 are radiated from the butted portions (see arrows a and b), and the heat retaining performance may be deteriorated.

そこで、本実施形態では、２分割構造の前記前方側真空断熱材片５１及び前記後方側真空断熱材片５２を缶体２の外周部に配置する際、それらの周方向両端部どうしを互いに径方向に重ねるようにして前記オーバーラップ部ＯＰ１，ＯＰ２を形成する。これにより、真空断熱材片５１，５２どうしの間に隙間がなくなるので、上記放熱を防止することができる。 Therefore, in this embodiment, when the front-side vacuum heat insulating material piece 51 and the rear-side vacuum heat insulating material piece 52 having a two-part structure are disposed on the outer peripheral portion of the can body 2, the both ends in the circumferential direction thereof are mutually diametered. The overlap portions OP1 and OP2 are formed so as to overlap in the direction. Thereby, since there is no gap between the vacuum heat insulating material pieces 51 and 52, the heat dissipation can be prevented.

一方、本実施形態では、前記真空断熱材５０と同様、取り付け時の作業性を向上するために、発泡断熱材６０も２つの発泡断熱材片（前方側発泡断熱材片５５及び後方側発泡断熱材片５６）に分割されている。このとき、前記のようにオーバーラップ部ＯＰ１，ＯＰ２では真空断熱材片５１，５２が径方向に二重に重なって十分な断熱性能を果たすようになっている。そこで、本実施形態では、前記２つの発泡断熱材片５５，５６を真空断熱材片５１，５２の外周部に配置する際、それらが周方向に突き合わされる突き合わせ部Ｓ１，Ｓ２の周方向位置を、前記オーバーラップ部Ｓ１，Ｓ２の周方向位置とそれぞれ一致させる（言い替えれば、真空断熱材片５１，５２のオーバーラップ部ＯＰ１，ＯＰ２の径方向外側に、発泡断熱材片５５，５６の突き合わせ部Ｓ１，Ｓ２を設ける）。このようにして、既に真空断熱材片５１，５２によって十分な保温性能が確保されている部位に発泡断熱材片５５，５６の突き合わせ部Ｓ１，Ｓ２を配置することで、缶体２から外部へ向かう放熱量を減少させ、給湯機全体として十分な保温性能を確保することができる。以上の結果、本実施形態によれば、断熱材５０，６０の取り付け時の作業性を確保しつつ、十分な保温性能を確保することができるものである。 On the other hand, in the present embodiment, as with the vacuum heat insulating material 50, in order to improve workability at the time of attachment, the foam heat insulating material 60 is also divided into two foam heat insulating material pieces (the front side foam heat insulating material piece 55 and the rear side foam heat insulating material). It is divided into material pieces 56). At this time, as described above, in the overlap portions OP1 and OP2, the vacuum heat insulating material pieces 51 and 52 are doubled in the radial direction so that sufficient heat insulating performance is achieved. So, in this embodiment, when arrange | positioning the said 2 foam insulation material pieces 55 and 56 in the outer peripheral part of the vacuum heat insulation material pieces 51 and 52, the circumferential direction position of butt | matching part S1, S2 with which they are butt | matched by the circumferential direction Are matched with the circumferential positions of the overlap portions S1 and S2 (in other words, the butt of the foam heat insulating material pieces 55 and 56 is arranged on the radially outer side of the overlap portions OP1 and OP2 of the vacuum heat insulating material pieces 51 and 52. Parts S1 and S2 are provided). In this way, by disposing the butted portions S1 and S2 of the foam heat insulating material pieces 55 and 56 in a portion where sufficient heat insulation performance is already secured by the vacuum heat insulating material pieces 51 and 52, the can body 2 is moved to the outside. It is possible to reduce the amount of heat radiated, and to ensure sufficient heat insulation performance as the whole water heater. As a result of the above, according to the present embodiment, sufficient heat retaining performance can be ensured while ensuring workability when the heat insulating materials 50 and 60 are attached.

また、本実施形態では特に、オーバーラップ部ＯＰ１では内側に後方側真空断熱材片５２、外側に前方側真空断熱材片５１の重なり状態とし、オーバーラップ部ＯＰ２では前方側真空断熱材片５１、外側に後方側真空断熱材片５２の重なり状態とする。この結果、前方側真空断熱材片５１及び後方側真空断熱材片５２に対し、缶体２の熱を内側で一次的に遮熱する機能とその外側で二次的に遮熱する機能とを両オーバーラップ部ＯＰ１，ＯＰ２においてそれぞれ均等に振り分け、分担することができるものである。 Further, in this embodiment, in particular, the overlap part OP1 has a rear side vacuum heat insulating material piece 52 on the inside and a front side vacuum heat insulating material piece 51 on the outside, and the overlap part OP2 has a front side vacuum heat insulating material piece 51, It is set as the overlapping state of the back side vacuum heat insulating material piece 52 outside. As a result, with respect to the front-side vacuum heat insulating material piece 51 and the rear-side vacuum heat insulating material piece 52, a function of primarily shielding the heat of the can body 2 on the inside and a function of shielding heat on the outside of the can body 2 are provided. The two overlapping portions OP1 and OP2 can be equally distributed and shared.

また、本実施形態では特に、前方側発泡断熱材片５５及び後方側真空断熱材片５２が、収納部５５ａ，５６ａをそれぞれ備える。これにより、各オーバーラップ部ＯＰ１，ＯＰにおいて径方向外側にそれぞれ位置する真空断熱材片５２，５１の端部５２ａ，５１ａを、収納部５６ａ，５５ａによって収納し、確実に位置決めしつつ保持できるものである。 In the present embodiment, in particular, the front-side foam heat insulating material piece 55 and the rear-side vacuum heat insulating material piece 52 each include the storage portions 55a and 56a. Thereby, the end portions 52a and 51a of the vacuum heat insulating material pieces 52 and 51 respectively positioned on the radially outer side in the overlap portions OP1 and OP can be stored by the storage portions 56a and 55a, and can be held while being reliably positioned. It is.

また、本実施形態では特に、前記収納部５５ａ，５６ａは、各発泡断熱材片５５，５６の径方向内周面に、横断面略矩形形状で備えられている。これにより、横断面略直線状に延びる後方側真空断熱材片５２の端部５２ａや前方側真空断熱材片５１の端部５１ａを、横断面略矩形形状の前記収納部５５ａ，５６ａによって、確実にフィットさせつつ安定的に保持できるものである。 Further, in the present embodiment, in particular, the storage portions 55a and 56a are provided on the radially inner peripheral surfaces of the foam heat insulating material pieces 55 and 56 in a substantially rectangular shape in cross section. Accordingly, the end portion 52a of the rear vacuum heat insulating material piece 52 extending in a substantially straight cross section and the end portion 51a of the front vacuum heat insulating material piece 51 are reliably secured by the storage portions 55a and 56a having a substantially rectangular cross section. It can be stably held while fitting.

また、本実施形態では特に、各発泡断熱材片５５，５６は、前方側真空断熱材片５１の曲折部５１ｂ及び後方側真空断熱材片５２の曲折部５２ｂにそれぞれ倣う、曲面部５５ｂ、５６ｂを備える。これにより、各オーバーラップ部ＯＰ１，ＯＰ２において径方向外側に位置しオーバーラップ部ＯＰ１，ＯＰ２外で径方向内側へと戻る、真空断熱材片５１，５２の曲折部５１ｂ，５２ｂを、曲面部５５ｂ，５６ｂによって確実に位置決めしつつ保持できるものである。 Further, in the present embodiment, in particular, the foam heat insulating material pieces 55 and 56 are curved surface portions 55b and 56b that respectively follow the bent portion 51b of the front vacuum heat insulating material piece 51 and the bent portion 52b of the rear vacuum heat insulating material piece 52. Is provided. As a result, the bent portions 51b and 52b of the vacuum heat insulating material pieces 51 and 52 that are located radially outside the overlap portions OP1 and OP2 and return radially inside outside the overlap portions OP1 and OP2 are converted into curved surface portions 55b. , 56b can be securely positioned and held.

また、本実施形態では特に、前記曲面部５５ｂ，５６ｂは、各発泡断熱材片５５，５６の径方向内周面に、横断面略円弧形状で備えられている。これにより、曲折しながら径方向内側へと戻る曲折部５１ｂ，５２ｂを、横断面略円弧形状の曲面部５５ｂ，５６ｂによって、確実にフィットさせつつ安定的に保持できるものである。 In the present embodiment, in particular, the curved surface portions 55b and 56b are provided on the radially inner peripheral surfaces of the foam heat insulating material pieces 55 and 56 in a substantially arc shape in cross section. Accordingly, the bent portions 51b and 52b that return to the inner side in the radial direction while being bent can be stably held while being securely fitted by the curved portions 55b and 56b having a substantially circular cross section.

また、本実施形態では特に、前記真空断熱材片５１，５２による前記オーバーラップ部ＯＰ１，ＯＰ２の前記長さＬを、前記突き合わせ部Ｓ１，Ｓ２の前記間隙Ｍより大きくしている。これにより、２つの発泡断熱材片５５，５６どうしの隙間寸法（言い替えれば外部に露出する開口寸法）よりも、２つの真空断熱材片５１，５２どうしのオーバーラップ寸法が大きくなるので、オーバーラップ部ＯＰ１，ＯＰ２において高い断熱性能を確実に得ることができるものである。 In the present embodiment, in particular, the length L of the overlap portions OP1 and OP2 due to the vacuum heat insulating material pieces 51 and 52 is made larger than the gap M between the butted portions S1 and S2. As a result, the overlap dimension between the two vacuum heat insulating material pieces 51 and 52 is larger than the gap size between the two foam heat insulating material pieces 55 and 56 (in other words, the opening size exposed to the outside). High heat insulation performance can be reliably obtained in the portions OP1 and OP2.

なお、本発明は上記実施形態に限定されるものではなく、発明の要旨を変更しない範囲で種々の変更が可能である。例えば、上記図４中右側の拡大図に対応する図６に示すように、オーバーラップ部ＯＰ１の径方向外側において、前方側発泡断熱材片５５の周方向一方側（オーバーラップ部ＯＰ１側）に設けた係合段付き部５５Ａと、後方側発泡断熱材片５６の周方向他方側（オーバーラップ部ＯＰ１側）に設けた係合段付き部５６Ａとを、前記突き合わせ部Ｓ１を介しつつ互いに係合させる構造としてもよい。なお、図示を省略しているが、オーバーラップ部ＯＰ２の径方向外側においても、上記同様に、前記前方側発泡断熱材片５５の周方向他方側（オーバーラップ部ＯＰ２側）に設けた同様の係合段付き部と、後方側発泡断熱材片５６の周方向一方側（オーバーラップ部ＯＰ２側）に設けた係合段付き部とが、前記突き合わせ部Ｓ２を介しつつ互いに係合している（すなわち、前方側発泡断熱材片５５及び後方側発泡断熱材片５６は、それぞれ、周方向両端部に前記係合段付き部を備えている）。 In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not change the summary of invention. For example, as shown in FIG. 6 corresponding to the enlarged view on the right side in FIG. 4, on the outer side in the radial direction of the overlap part OP <b> 1, on the circumferential direction one side (overlap part OP <b> 1 side) of the front side foam insulation material piece 55. The provided engagement stepped portion 55A and the engagement stepped portion 56A provided on the other circumferential side (overlap portion OP1 side) of the rear foam insulation piece 56 are engaged with each other through the abutting portion S1. A structure to be combined may be used. In addition, although illustration is abbreviate | omitted, the same thing provided in the circumferential direction other side (overlap part OP2 side) of the said front side foam insulation material piece 55 similarly to the above also in the radial direction outer side of the overlap part OP2. The engaging stepped portion and the engaging stepped portion provided on one side in the circumferential direction (overlap portion OP2 side) of the rear foam insulation piece 56 are engaged with each other via the abutting portion S2. (That is, each of the front side foam insulation material piece 55 and the rear side foam insulation material piece 56 includes the engagement stepped portions at both ends in the circumferential direction).

この場合、各発泡断熱材片５５，５６の周方向両端部の前記係合段付き部５５Ａ，５６Ａ等を互いに係合させることで、２つの発泡断熱材片５５，５６を真空断熱材片５１，５２の径方向外周部に組み付けるときの組み付け性を向上することができる。また、段付き形状とすることで、突き合わせ部Ｓ１，Ｓ２の形状をクランク形状とすることができるとともに、突き合わせ部Ｓ１，Ｓ２の周方向寸法である上記間隙Ｍを小さくできるので、前記放熱に対する遮熱効果もあるものである。 In this case, by engaging the engaging stepped portions 55A, 56A and the like at both ends in the circumferential direction of the foam heat insulating pieces 55, 56, the two foam heat insulating pieces 55, 56 are connected to the vacuum heat insulating piece 51. , 52 can be improved in assembling property when assembled to the radially outer peripheral portion. Further, by adopting the stepped shape, the shape of the butted portions S1 and S2 can be changed to a crank shape, and the gap M that is the circumferential dimension of the butted portions S1 and S2 can be reduced. There is also a thermal effect.

また、例えば、真空断熱材片５１，５２として、図７（ａ）及び図７（ｂ）に示すように、略真空状態の内部に所定の芯材（例えば前記のグラスウール。但し図示省略）が充填された袋部ＢＡと、袋部ＢＡの外周側に位置する耳部Ｂｅとを備えたものが用いられる場合がある。このような場合には、図８に示すように、各オーバーラップ部ＯＰ１，ＯＰ２において、真空断熱材片５１，５２のいずれについても、前記耳部Ｂｅを前記袋部ＢＡの径方向外側に折りたたむようにしつつ、径方向に重ねればよい。 Further, for example, as the vacuum heat insulating material pieces 51 and 52, as shown in FIGS. 7 (a) and 7 (b), a predetermined core material (for example, the above-mentioned glass wool, but not shown) is provided in a substantially vacuum state. In some cases, a bag having a filled bag portion BA and an ear Be positioned on the outer peripheral side of the bag portion BA may be used. In such a case, as shown in FIG. 8, in each of the overlap portions OP1 and OP2, the ear portion Be is folded outwardly in the radial direction of the bag portion BA in both of the vacuum heat insulating material pieces 51 and 52. In this way, it is sufficient to overlap in the radial direction.

この変形例によれば、袋部ＢＡのほかに耳部Ｂｅを備える真空断熱材片５１，５２が用いられる場合であっても、確実に前記オーバーラップ部ＯＰ１，ＯＰ２を構築することができる。また、各真空断熱材片５１，５２において、耳部Ｂｅを袋部ＢＡの径方向外側に折りたたんで配置することにより、さらに確実にオーバーラップ部ＯＰ１，ＯＰ２における遮熱効果を得ることができるものである。 According to this modification, even when the vacuum heat insulating material pieces 51 and 52 including the ears Be in addition to the bag part BA are used, the overlap parts OP1 and OP2 can be reliably constructed. Moreover, in each vacuum heat insulating material piece 51 and 52, the ear | edge part Be can be folded and arrange | positioned at the radial direction outer side of bag part BA, and the heat-shielding effect in overlap part OP1 and OP2 can be acquired more reliably. It is.

また、上記実施形態では、加熱手段をヒートポンプユニット３で構成した場合を例にとって説明したが、これに限られない。すなわち、太陽熱、ガス、液体燃料による給湯機や、電熱ヒータによる電気温水器や、コージェネレーションシステムの廃熱回収装置等を前記加熱手段として用いても良い。 Moreover, although the said embodiment demonstrated as an example the case where a heating means was comprised with the heat pump unit 3, it is not restricted to this. That is, a hot water heater using solar heat, gas or liquid fuel, an electric water heater using an electric heater, a waste heat recovery device of a cogeneration system, or the like may be used as the heating means.

１貯湯タンクユニット（貯湯式給湯機）
２缶体
３ヒートポンプユニット（加熱手段）
５０真空断熱材
５１前方側真空断熱材片（第１断熱材片）
５２後方側真空断熱材片（第２断熱材片）
５５前方側発泡断熱材片
５５Ａ係合段付き部
５５ａ収納部
５５ｂ曲面部
５６後方側発泡断熱材片
５６Ａ係合段付き部
５６ａ収納部
５６ｂ曲面部
６０発泡断熱材
１００貯湯式給湯装置
ＢＡ袋部
Ｂｅ耳部
ＯＰ１，ＯＰ２オーバーラップ部
Ｓ１，Ｓ２突き合わせ部
1 Hot water storage tank unit (hot water storage water heater)
2 Can body 3 Heat pump unit (heating means)
50 Vacuum heat insulating material 51 Front side vacuum heat insulating material piece (first heat insulating material piece)
52 Rear vacuum insulation piece (second insulation piece)
55 Front Foaming Insulation Piece 55A Engagement Stepped Part 55a Storage Part 55b Curved Part 56 Rear Side Foaming Insulation Part 56A Engagement Stepped Part 56a Storage Part 56b Curved Part 60 Foaming Insulation Material 100 Hot Water Storage Water Supply Device BA Bag Part Be Ear part OP1, OP2 Overlap part S1, S2 Butting part

Claims

加熱手段で加熱された湯水を内部に貯湯する、略円筒形の缶体と、
前記缶体の径方向外周部を覆うように設けられ、横断面略円弧状の２つの真空断熱材片に分割された真空断熱材と、
前記真空断熱材の径方向外周部を覆うように設けられ、横断面略円弧状の２つの発泡断熱材片に分割された発泡断熱材と
を有する貯湯式給湯機において、
前記２つの真空断熱材片を、
周方向両端部どうしが互いに径方向に重なる２つのオーバーラップ部を形成するように配置し、
前記２つのオーバーラップ部それぞれの周方向位置を、前記２つの発泡断熱材片が互いに周方向に突き合わされる突き合わせ部の周方向位置と一致させた
ことを特徴とする貯湯式給湯機。 A substantially cylindrical can that stores hot water heated by a heating means;
A vacuum heat insulating material provided so as to cover a radially outer peripheral portion of the can body and divided into two vacuum heat insulating material pieces having a substantially arc-shaped cross section;
In the hot water storage type hot water heater having a foam heat insulating material divided into two foam heat insulating material pieces provided so as to cover the radially outer peripheral portion of the vacuum heat insulating material,
The two vacuum insulation pieces,
Arranged so as to form two overlapping portions in which both ends in the circumferential direction overlap each other in the radial direction,
A hot water storage type hot water supply machine characterized in that a circumferential position of each of the two overlap portions is made to coincide with a circumferential position of a butting portion where the two foamed heat insulating material pieces are butted against each other in the circumferential direction.

前記２つの真空断熱材片は、
前記缶体の前面側に配置される第１断熱材片と、
前記缶体の背面側に配置される第２断熱材片とを含み、
前記２つのオーバーラップ部のうち一方のオーバーラップ部では、前記第１断熱材片が第２断熱材片の径方向外側において径方向に重なり、
前記２つのオーバーラップ部のうち他方のオーバーラップ部では、前記第２断熱材片が第１断熱材片の径方向外側において径方向に重なる
ことを特徴とする請求項１記載の貯湯式給湯機。 The two vacuum insulation pieces are:
A first heat insulating material piece disposed on the front side of the can,
A second heat insulating material piece disposed on the back side of the can body,
In one overlap portion of the two overlap portions, the first heat insulating material piece overlaps in the radial direction on the radially outer side of the second heat insulating material piece,
2. The hot water storage type hot water heater according to claim 1, wherein in the other overlap portion of the two overlap portions, the second heat insulating material piece overlaps in a radial direction on a radially outer side of the first heat insulating material piece. .

前記第１断熱材片及び前記第２断熱材片は、それぞれ、
略真空状態の内部に所定の芯材が充填された袋部と、
前記袋部の外周側に位置する耳部と
を備えており、
かつ、
前記第１断熱材片及び前記第２断熱材片は、
いずれの前記オーバーラップ部においても、前記耳部が前記袋部の径方向外側に折りたたまれつつ、互いに径方向に重なっている
ことを特徴とする請求項２記載の貯湯式給湯機。 The first heat insulating material piece and the second heat insulating material piece are respectively
A bag portion filled with a predetermined core material in a substantially vacuum state;
An ear located on the outer peripheral side of the bag portion,
And,
The first heat insulating material piece and the second heat insulating material piece are:
3. The hot water storage type hot water heater according to claim 2, wherein, in any of the overlap portions, the ear portions are folded radially outward of the bag portion and overlap each other in the radial direction.

前記２つの発泡断熱材片のそれぞれは、
前記第１断熱材片及び前記第２断熱材片のうち、各オーバーラップ部において径方向外側に位置する断熱材片の、横断面略直線状に延びる周方向端部を収納する、収納部を備える
ことを特徴とする請求項３記載の貯湯式給湯機。 Each of the two foam insulation pieces is
A storage portion for storing a circumferential end portion extending in a substantially linear cross section of the heat insulation piece located radially outward in each overlap portion of the first heat insulation piece and the second heat insulation piece. The hot water storage type water heater according to claim 3, wherein the hot water storage type water heater is provided.

前記収納部は、
各発泡断熱材片の径方向内周面に、横断面略矩形形状で備えられている
ことを特徴とする請求項４記載の貯湯式給湯機。 The storage section is
The hot water storage type hot water heater according to claim 4, wherein each foam heat insulating material piece has a substantially rectangular shape in cross section on a radially inner peripheral surface thereof.

前記２つの発泡断熱材片のそれぞれは、
前記第１断熱材片及び前記第２断熱材片のうち、各オーバーラップ部において径方向外側に位置する断熱材片が当該オーバーラップ部外で径方向内側へ戻るように曲折する曲折部に倣う、曲面部を備える
ことを特徴とする請求項３〜請求項５の何れか１項に記載の貯湯式給湯機。 Each of the two foam insulation pieces is
Of the first heat insulating material piece and the second heat insulating material piece, the heat insulating material piece positioned radially outward in each overlap portion follows a bent portion that is bent so as to return to the radially inner side outside the overlap portion. The hot water storage type hot water supply device according to any one of claims 3 to 5, further comprising a curved surface portion.

前記曲面部は、
各発泡断熱材片の径方向内周面に、横断面略円弧形状で備えられている
ことを特徴とする請求項６記載の貯湯式給湯機。 The curved surface portion is
The hot water storage type hot water heater according to claim 6, wherein each foam heat insulating material piece is provided in a radially inner circumferential surface in a substantially arc shape in cross section.

前記２つの発泡断熱材片のそれぞれは、
前記オーバーラップ部の径方向外側で、前記突き合わせ部において互いに係合する係合段付き部を、周方向両端部に備える
ことを特徴とする請求項１〜請求項７の何れか１項に記載の貯湯式給湯機。 Each of the two foam insulation pieces is
The engagement stepped portion that engages with each other at the abutting portion is provided at both ends in the circumferential direction outside the overlap portion in the radial direction. Hot water storage water heater.

前記２つの真空断熱材片による前記オーバーラップ部の周方向寸法を、前記突き合わせ部の周方向寸法より大きくした
ことを特徴とする請求項１〜請求項８の何れか１項に記載の貯湯式給湯機。 The hot water storage system according to any one of claims 1 to 8, wherein a circumferential dimension of the overlap portion by the two vacuum heat insulating material pieces is larger than a circumferential dimension of the butted portion. Water heater.