JP5112267B2 - Heat storage material storage container - Google Patents

Heat storage material storage container Download PDF

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Publication number
JP5112267B2
JP5112267B2 JP2008300397A JP2008300397A JP5112267B2 JP 5112267 B2 JP5112267 B2 JP 5112267B2 JP 2008300397 A JP2008300397 A JP 2008300397A JP 2008300397 A JP2008300397 A JP 2008300397A JP 5112267 B2 JP5112267 B2 JP 5112267B2
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storage material
heat storage
container
heat
adsorbent
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JP2010127127A (en
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寛史 杉浦
昌光 早川
篤彦 杉田
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Aisan Industry Co Ltd
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Aisan Industry Co Ltd
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Description

本発明は、蒸発燃料用の吸着材が充填されるキャニスタ内に設置される構成で、前記吸着材から熱を奪い、あるいは前記吸着材に対して熱を供給可能な蓄熱材を収納する密閉式の蓄熱材収納容器に関する。   The present invention is a structure installed in a canister filled with an adsorbent for evaporative fuel, and encloses a heat storage material capable of depriving heat from the adsorbent or supplying heat to the adsorbent. It relates to a heat storage material storage container.

これに関する従来の蓄熱材収納容器が特許文献１に記載されている。
蓄熱材は、吸着材から熱を奪い、あるいは前記吸着材に対して熱を供給することでキャニスタ内の温度変化を抑制する部材であり、図５に示す密閉式の蓄熱材収納容器１００に収納されている。そして、その蓄熱材収納容器１００が吸着材Ｃと共にキャニスタ１０２内に収納されている。
前記蓄熱材収納容器１００は、容器本体部と、その容器本体部の開口を塞ぐ栓部材とを備えており、前記栓部材が前記蓄熱材の沸点よりも低い融点の材料で形成されている。このため、車両火災時等の熱により蓄熱材が気化することで蓄熱材収納容器１００の内部圧力が上昇しても、前記栓部材が溶けることで容器本体部の開口が開放され、蓄熱材収納容器１００の破裂を防止できる。 A conventional heat storage material storage container in this regard is described in Patent Document 1.
The heat storage material is a member that deprives heat from the adsorbent or suppresses temperature change in the canister by supplying heat to the adsorbent, and is stored in the sealed heat storage material storage container 100 shown in FIG. Has been. The heat storage material storage container 100 is stored in the canister 102 together with the adsorbent C.
The heat storage material storage container 100 includes a container main body and a plug member that closes the opening of the container main body, and the plug member is formed of a material having a melting point lower than the boiling point of the heat storage material. For this reason, even if the internal pressure of the heat storage material storage container 100 rises due to vaporization of the heat storage material due to heat at the time of a vehicle fire or the like, the opening of the container main body is opened by melting the plug member, and the heat storage material storage The rupture of the container 100 can be prevented.

特開２００８−３８６８８号JP 2008-38688 A

しかし、蓄熱材収納容器１００は、容器本体部と、その容器本体部の開口を塞ぐ栓部材とから構成されているため、容器本体部の開口と栓部材間をシールする部材が必要となり、構造が複雑化してコスト高となる。
また、栓部材と容器本体部の開口との接合部分の強度が低くなり、蓄熱材収納容器１００の耐久性が低下する。 However, since the heat storage material storage container 100 is composed of a container main body and a plug member that closes the opening of the container main body, a member that seals between the opening of the container main body and the plug member is required. Becomes complicated and expensive.
Moreover, the strength of the joint portion between the plug member and the opening of the container main body portion is lowered, and the durability of the heat storage material storage container 100 is lowered.

本発明は、上記問題点を解決するためになされたものであり、本発明の技術的課題は、蓄熱材収納容器の破裂防止対策を低コストで行えるようにするとともに、破裂防止対策に起因して蓄熱材収納容器の耐久性が低下しないようにすることである。   The present invention has been made to solve the above-described problems, and the technical problem of the present invention is that it is possible to take measures for preventing the heat storage material storage container from bursting at low cost, and to originate from measures for preventing bursting. This is to prevent the durability of the heat storage material storage container from decreasing.

上記した課題は、各請求項の発明によって解決される。
請求項１の発明は、蒸発燃料用の吸着材が充填されるキャニスタ内に設置される構成で、前記吸着材から熱を奪い、あるいは前記吸着材に対して熱を供給可能な蓄熱材を収納する密閉式の蓄熱材収納容器であって、前記蓄熱材の収納空間を構成する空間形成壁部と、その空間形成壁部を全周に亘って囲むよう形成された合わせ部とを備える複数の金属製の容器構成部材からなり、前記各々の容器構成部材の合わせ部が相互に合わされた状態で、それらの合わせ部が接合線に沿ってレーザ溶接される構成であり、前記接合線は前記容器構成部材の空間形成壁部を全周に亘って囲むように枠状に設定されて、一部の接合線が前記枠状に設定された接合線の内側に入り込んでおり、前記容器構成部材により形成された前記蓄熱材の収納空間が内圧上昇により前記枠状の接合線に沿ってレーザ溶接された部位まで膨らむように変形することで、前記一部の接合線に沿ってレーザ溶接された部位が前記蓄熱材の収納空間内に突出し、これにより前記一部の接合線に沿ってレーザ溶接された部位に応力が集中し、その応力集中部に亀裂が生じるように構成されている。 The above-described problems are solved by the inventions of the claims.
The invention of claim 1 is configured to be installed in a canister filled with an adsorbent for evaporative fuel, and stores a heat storage material capable of depriving heat from the adsorbent or supplying heat to the adsorbent. A sealed heat storage material storage container that includes a space forming wall portion that forms a storage space for the heat storage material, and a plurality of mating portions that are formed so as to surround the space forming wall portion over the entire circumference. The container is made of a metal container, and in a state where the mating portions of the respective container components are mated with each other, the mating portions are laser welded along a joining line, and the joining line is the container It is set in a frame shape so as to surround the space forming wall portion of the component member over the entire circumference, and a part of the joint line enters the inside of the joint line set in the frame shape, and the container component member It formed the heat storage material of the storage space on the internal pressure Projecting said frame-shaped along the welding line by deforming so as to expand to the site that has been laser welded portion is laser welded along the welding line of the part of the storage space of the heat storage material by which Thus , the stress is concentrated on the laser welded portion along the part of the joining line, and the stress concentration portion is cracked.

本発明によると、蓄熱材の収納空間を構成する容器構成部材には、その容器構成部材が内圧上昇により膨らむように変形するときに、応力が集中し、亀裂が生じるように構成された応力集中部が一部分に設けられている。このため、例えば、車両火災等で蓄熱材収納容器内の蓄熱材が気化することで内圧が上昇した場合に、前記応力集中部に応力が集中して亀裂が生じ、その亀裂から蓄熱材収納容器内の圧力が逃がされる。これにより、蓄熱材収納容器の破裂を防止できる。即ち、蓄熱材収納容器の一部に応力集中部を設けるだけで破裂防止を図れるため、破裂防止対策用に別部材が必要なくなり、破裂防止対策を低コストで行えるようになる。
また、応力集中部は、蓄熱材収納容器が内圧上昇により膨らむように変形するときに応力が集中すれば良く、他の部分よりも強度を低く構成する必要がない。さらに、通常の使用状態では前記応力集中部に応力が集中することはない。このため、前記応力集中部を設けることで蓄熱材収納容器の耐久性が低下することはない。
さらに、溶接部分を一部追加するだけで応力集中部を形成できるため、応力集中部を低コストで形成できるようになる。 According to the present invention, the stress concentration that is configured such that stress is concentrated on the container constituent member constituting the storage space for the heat storage material when the container constituent member is deformed so as to swell due to an increase in internal pressure, and a crack is generated. The part is provided in a part. For this reason, for example, when the internal pressure rises due to the vaporization of the heat storage material in the heat storage material storage container due to a vehicle fire or the like, the stress concentrates on the stress concentration portion to cause a crack, and the heat storage material storage container is generated from the crack. The pressure inside is relieved. Thereby, rupture of the heat storage material storage container can be prevented. That is, since it is possible to prevent bursting by simply providing a stress concentration part in a part of the heat storage material storage container, no separate member is required for the burst prevention measure, and the burst prevention measure can be performed at low cost.
Further, the stress concentration portion only needs to concentrate stress when the heat storage material storage container is deformed so as to swell due to an increase in internal pressure, and does not need to be configured to have lower strength than the other portions. Furthermore, stress does not concentrate on the stress concentration portion in a normal use state. For this reason, the durability of the heat storage material storage container is not lowered by providing the stress concentration portion.
Furthermore, since the stress concentration portion can be formed only by adding a part of the welded portion, the stress concentration portion can be formed at low cost.

請求項２の発明によると、容器構成部材の合わせ部には一部分に窪み部が形成されて、接合線の一部が前記窪み部と重なる位置に設定されており、前記窪み部の位置の溶接部位が応力集中部となることを特徴とする。
According to the invention of claim 2 , a recess is formed in a part of the mating portion of the container constituent member, and a part of the joining line is set at a position overlapping the recess, and welding at the position of the recess is performed. The site is a stress concentration part.

本発明によると、蓄熱材収納容器の破裂防止対策を低コストで行えるとともに、破裂防止対策に起因して蓄熱材収納容器の耐久性が低下することがない。   According to the present invention, measures for preventing the heat storage material storage container from bursting can be performed at low cost, and the durability of the heat storage material storage container does not deteriorate due to the countermeasures for preventing bursting.

（実施形態１）
以下、図１から図４に基づいて本発明の実施形態１に係る蓄熱材収納容器の説明を行う。本実施形態に係る蓄熱材収納容器は、蓄熱材を収納した状態で自動車の蒸発燃料処理装置におけるキャニスタ内に設置される密閉容器である。ここで、図１は本発明の実施形態１に係る蓄熱材収納容器を備えるキャニスタの平断面図である。図２は蓄熱材収納容器の平面図（Ａ図）、Ａ図のＢ部拡大図（Ｂ図）、図３は、図２（Ｂ）のIII-III矢視断面図である。また、図４は変更例に係る蓄熱材収納容器の部分拡大図である。 (Embodiment 1)
Hereinafter, the heat storage material storage container according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 4. The heat storage material storage container according to the present embodiment is a sealed container installed in a canister in an evaporative fuel processing apparatus of an automobile in a state in which the heat storage material is stored. Here, FIG. 1 is a plan sectional view of a canister provided with a heat storage material storage container according to Embodiment 1 of the present invention. 2 is a plan view of the heat storage material storage container (FIG. A), an enlarged view of part B of FIG. A (FIG. B), and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. Moreover, FIG. 4 is the elements on larger scale of the thermal storage material storage container which concerns on the example of a change.

＜蒸発燃料処理装置の概要について＞
本実施形態に係る蓄熱材収納容器４０，５０について説明する前に蒸発燃料処理装置の概要について説明する。
蒸発燃料処理装置は、自動車の燃料タンク（図示省略）内で発生した蒸発燃料が大気に漏れ出るのを防止する装置である。蒸発燃料処理装置は、図１に示すキャニスタ２０と、前記キャニスタ２０と前記燃料タンクとを連通させる蒸発燃料通路（図示省略）と、前記キャニスタ２０とエンジンの吸気通路とを連通させるパージ通路（図示省略）等から構成されている。
キャニスタ２０は、内部が複数に仕切られた容器本体部２１と、その容器本体部２１の開口（図１において下端側）を塞ぐ蓋部２２とを備えている。容器本体部２１の内部は、仕切り壁２１ｗによって主室２４と副室２５とに仕切られており、その副室２５が通気性のバッファープレート２３により第１副室２５ａと第２副室２５ｂとに仕切られている。
容器本体部２１には、蓋部２２と反対側の底壁部にタンクポート２４１とパージポート２４２、及び大気ポート２５１が並んで形成されており、前記タンクポート２４１、パージポート２４２が通気性の多孔板２４ｘを介して主室２４と連通している。また、前記大気ポート２５１が第１副室２５ａと連通している。 <About the Evaporative Fuel Treatment System>
Before describing the heat storage material storage containers 40 and 50 according to the present embodiment, an outline of the evaporated fuel processing apparatus will be described.
The evaporative fuel processing apparatus is an apparatus that prevents evaporative fuel generated in a fuel tank (not shown) of an automobile from leaking into the atmosphere. The evaporative fuel processing apparatus includes a canister 20 shown in FIG. 1, an evaporative fuel passage (not shown) that connects the canister 20 and the fuel tank, and a purge passage (not shown) that connects the canister 20 and an intake passage of the engine. (Omitted).
The canister 20 includes a container main body 21 that is partitioned into a plurality of interiors, and a lid 22 that closes an opening (the lower end side in FIG. 1) of the container main body 21. The inside of the container main body 21 is partitioned into a main chamber 24 and a sub chamber 25 by a partition wall 21w, and the sub chamber 25 is divided into a first sub chamber 25a and a second sub chamber 25b by a breathable buffer plate 23. It is divided into.
The container body 21 is formed with a tank port 241, a purge port 242 and an atmospheric port 251 side by side on the bottom wall portion opposite to the lid portion 22. The tank port 241 and the purge port 242 are air permeable. The main chamber 24 communicates with the perforated plate 24x. The atmospheric port 251 communicates with the first sub chamber 25a.

容器本体部２１の主室２４には、後記する蓄熱材Ｔを内蔵する第１蓄熱材収納容器４０が収納されており、その第１蓄熱材収納容器４０と主室２４の内壁面間の空間に蒸発燃料を吸着する吸着材Ｃが充填されている。そして、前記容器本体部２１の主室２４の開口２４ｈが通気性の内蓋板２７によって塞がれている。
ここで、吸着材Ｃは、蒸発燃料を吸着するとともに、空気パージされることで吸着した蒸発燃料を離脱可能な活性炭等により構成されている。また、蓄熱材Ｔは、凝固、あるいは溶融する際の潜熱を利用して吸着材Ｃの温度変化（キャニスタ２０内の温度変化）を抑制する部材であり、本実施形態では、例えば、融点が18℃のヘキサデカン（Ｃ16Ｈ34）等が使用される。
容器本体部２１の第２副室２５ｂには、蓄熱材Ｔを内蔵する第２蓄熱材収納容器５０が取付けられており、第２蓄熱材収納容器５０と第２副室２５ｂの内壁面との間の空間に吸着材Ｃが充填されている。そして、第２副室２５ｂの開口２５ｈが通気性の内蓋板２９によって塞がれている。
前記第２副室２５ｂを塞ぐ内蓋板２９、及び前記主室２４を塞ぐ内蓋板２７と前記蓋部２２とにより構成される空間２６は、主室２４と第２副室２５ｂとを連通させる拡散空間２６として機能する。 A first heat storage material storage container 40 containing a heat storage material T, which will be described later, is stored in the main chamber 24 of the container body 21, and a space between the first heat storage material storage container 40 and the inner wall surface of the main chamber 24. Is filled with an adsorbent C that adsorbs evaporated fuel. The opening 24 h of the main chamber 24 of the container main body 21 is closed by a breathable inner lid plate 27.
Here, the adsorbent C is made of activated carbon or the like capable of adsorbing the evaporated fuel and detaching the adsorbed evaporated fuel by being purged with air. Further, the heat storage material T is a member that suppresses the temperature change of the adsorbent C (temperature change in the canister 20) by using latent heat at the time of solidification or melting. In this embodiment, for example, the melting point is 18 ℃ hexadecane (C 16 H 34) or the like is used.
A second heat storage material storage container 50 containing a heat storage material T is attached to the second sub chamber 25b of the container body 21. The second heat storage material storage container 50 and the inner wall surface of the second sub chamber 25b are connected to each other. The adsorbent C is filled in the space between. The opening 25h of the second sub chamber 25b is closed by a breathable inner lid plate 29.
The inner lid plate 29 that closes the second sub chamber 25b, and the space 26 that is formed by the inner lid plate 27 that closes the main chamber 24 and the lid portion 22 communicates the main chamber 24 and the second sub chamber 25b. It functions as the diffusion space 26 to be made.

＜第１蓄熱材収納容器４０、第２蓄熱材収納容器５０について＞
前記蓄熱材Ｔを収納する第１蓄熱材収納容器４０、第２蓄熱材収納容器５０は、図２（Ａ）（Ｂ）、及び図３に示すように、皿状の上側パネル４２と、断面略台形をした皿状の下側パネル４４とが接合されることにより構成される。ここで、第１蓄熱材収納容器４０と第２蓄熱材収納容器５０とは構成が等しいため、代表して第１蓄熱材収納容器４０の説明をすることで第２蓄熱材収納容器５０の説明は省略する。
第１蓄熱材収納容器４０の上側パネル４２、下側パネル４４は、長方形の皿状をしたパネル本体部４２１，４４１と、そのパネル本体部４２１，４４１を全周に亘って囲むように設けられたフランジ部４２２，４４２とから構成されている。そして、上側パネル４２のフランジ部４２２と下側パネル４４のフランジ部４４２とが合わせられ、両フランジ部４２２，４４２が接合されることで蓄熱材Ｔの収納空間Ｓを備える密閉式の第１蓄熱材収納容器４０が構成される。ここで、上側パネル４２、下側パネル４４の素材としては、例えば、約0.6mm のステンレス板等が使用される。
即ち、前記上側パネル４２、下側パネル４４が本発明の壁部及び容器構成部材に相当し、上側パネル４２、下側パネル４４のパネル本体部４２１，４４１が本発明の空間形成壁部に相当する。また、上側パネル４２、下側パネル４４のフランジ部４２２，４４２が本発明の合わせ部に相当する。 <About the 1st heat storage material storage container 40 and the 2nd heat storage material storage container 50>
The first heat storage material storage container 40 and the second heat storage material storage container 50 for storing the heat storage material T are, as shown in FIGS. 2 (A), (B), and FIG. It is configured by joining a substantially trapezoidal dish-shaped lower panel 44. Here, since the 1st heat storage material storage container 40 and the 2nd heat storage material storage container 50 have the same structure, description of the 2nd heat storage material storage container 50 is demonstrated by describing the 1st heat storage material storage container 40 on behalf. Is omitted.
The upper panel 42 and the lower panel 44 of the first heat storage material storage container 40 are provided so as to surround the panel body parts 421 and 441 having a rectangular dish shape and the panel body parts 421 and 441 over the entire circumference. And flange portions 422 and 442. And the flange part 422 of the upper side panel 42 and the flange part 442 of the lower side panel 44 are match | combined, and both the flange parts 422 and 442 are joined, and the sealing type 1st heat storage provided with the storage space S of the thermal storage material T is carried out. A material storage container 40 is configured. Here, as a material of the upper panel 42 and the lower panel 44, for example, a stainless plate of about 0.6 mm is used.
That is, the upper panel 42 and the lower panel 44 correspond to the wall portion and the container constituting member of the present invention, and the panel main body portions 421 and 441 of the upper panel 42 and the lower panel 44 correspond to the space forming wall portion of the present invention. To do. The flange portions 422 and 442 of the upper panel 42 and the lower panel 44 correspond to the mating portions of the present invention.

上側パネル４２のフランジ部４２２には、図２（Ａ）（Ｂ）に示すように、長手方向における左端縁中央位置に平面角形の窪み部４５が形成されている。窪み部４５は、図３に示すように、フランジ部４２２の裏面側（接合面側）に凹凸が生じないように、そのフランジ部４２２の表面側に所定の深さ寸法で形成されている。即ち、フランジ部４２２の窪み部４５の肉厚寸法は、そのフランジ部４２２の他の部分の肉厚寸法よりも窪み部４５の深さ寸法分だけ小さく設定されている。ここで、前記窪み部４５は、例えば、プレス成形されるため、他の部分より薄肉であっても強度は他の部分と比較してさほど低下していない。   As shown in FIGS. 2 (A) and 2 (B), the flange portion 422 of the upper panel 42 is formed with a flat rectangular recess 45 at the center position of the left edge in the longitudinal direction. As shown in FIG. 3, the recess 45 is formed with a predetermined depth dimension on the front surface side of the flange portion 422 so that unevenness does not occur on the back surface side (joint surface side) of the flange portion 422. That is, the thickness of the recess 45 of the flange 422 is set smaller than the thickness of the other portion of the flange 422 by the depth of the recess 45. Here, since the said recessed part 45 is press-molded, for example, even if it is thinner than another part, intensity | strength is not falling so much compared with another part.

上側パネル４２と下側パネル４４とは、内部に蓄熱材Ｔが収納された状態で、互いのフランジ部４２２，４４２等が溶接線Ｗ（二点鎖線参照）に沿ってレーザ溶接される。溶接線Ｗは、図２（Ａ）（Ｂ）に示すように、窪み部４５の外側でフランジ部４２２，４４２に沿って枠状に設定された枠状部分Ｗｋと、窪み部４５の近傍で枠状部分Ｗｋから分岐し、その窪み部４５の位置まで線状に延びる分岐部分ｗｔとから構成されている。即ち、上側パネル４２と下側パネル４４とは、互いのフランジ部４２２，４４２の位置で全周に亘ってレーザ溶接されるとともに、窪み部４５の位置もレーザ溶接される。このため、全周に亘って枠状にレーザ溶接された溶接部位Ｗｋに対して窪み部４５の溶接部位Ｗｔが蓄熱材Ｔの収納空間Ｓの方向に突出するようになる。したがって、例えば、第１蓄熱材収納容器４０の内圧が上昇して上側パネル４２、下側パネル４４が膨らむように変形すると、窪み部４５の溶接部位Ｗｔが前記収納空間Ｓ内に突出し、これにより溶接部位Ｗｔに応力が集中するようになる。ここで、窪み部４５の溶接部位Ｗｔの強度は、上側パネル４２、下側パネル４４のパネル本体部４２１，４４１が膨らむように変形し、応力が集中した状態で亀裂が生じる強度に設定されている。
即ち、窪み部４５の溶接部位Ｗｔが本発明の応力集中部に相当し、溶接線Ｗが本発明の接合線に相当する。 The upper panel 42 and the lower panel 44 are laser welded along the weld line W (see the two-dot chain line) with the heat storage material T housed therein. As shown in FIGS. 2A and 2B, the weld line W is formed in a frame-like portion Wk that is set in a frame shape along the flange portions 422 and 442 on the outside of the recess portion 45, and in the vicinity of the recess portion 45. The branch part wt branches off from the frame-like part Wk and extends linearly to the position of the recess 45. That is, the upper panel 42 and the lower panel 44 are laser welded over the entire circumference at the positions of the flange portions 422 and 442, and the position of the recess 45 is also laser welded. For this reason, the welding part Wt of the hollow part 45 protrudes in the direction of the storage space S of the heat storage material T with respect to the welding part Wk laser-welded in frame shape over the perimeter. Therefore, for example, when the internal pressure of the first heat storage material storage container 40 rises and the upper panel 42 and the lower panel 44 are deformed so as to swell, the welded portion Wt of the recess 45 protrudes into the storage space S, thereby Stress concentrates on the welded part Wt. Here, the strength of the welded portion Wt of the hollow portion 45 is set to a strength at which the panel main body portions 421 and 441 of the upper panel 42 and the lower panel 44 are deformed so as to be cracked in a state where stress is concentrated. Yes.
That is, the welding part Wt of the hollow part 45 corresponds to the stress concentration part of the present invention, and the weld line W corresponds to the joining line of the present invention.

＜蒸発燃料処理装置の動作について＞
先ず、自動車のエンジンが停止しているときの蒸発燃料処理装置の動作について説明する。
燃料タンク内で発生した蒸発燃料は、図１の白抜き矢印に示すように、蒸発燃料通路によりキャニスタ２０のタンクポート２４１から主室２４内に導かれ、主室２４内の吸着材Ｃに吸着される。そして、主室２４内の吸着材Ｃで吸着しきれなかった蒸発燃料が拡散空間２６を介して第２副室２５ｂに導かれ、第２副室２５ｂ内の吸着材Ｃによって吸着される。
前記吸着材Ｃに蒸発燃料が吸着されると、吸着材Ｃの温度が上昇して吸着効率が徐々に低下する。しかし、キャニスタ２０内には、第１蓄熱材収納容器４０、及び第２蓄熱材収納容器５０内に蓄熱材Ｔが収納されているため、キャニスタ２０内の温度が上昇して18℃を超えると、蓄熱材Ｔが溶融する際に吸着材Ｃの熱を奪い、前記吸着材Ｃの温度上昇が抑えられる。このため、吸着材Ｃの蒸発燃料の吸着効率低下を抑制できる。 <Operation of Evaporative Fuel Treatment Device>
First, the operation of the evaporated fuel processing apparatus when the automobile engine is stopped will be described.
The evaporated fuel generated in the fuel tank is guided into the main chamber 24 from the tank port 241 of the canister 20 through the evaporated fuel passage and is adsorbed by the adsorbent C in the main chamber 24 as indicated by the white arrow in FIG. Is done. Then, the evaporated fuel that could not be adsorbed by the adsorbent C in the main chamber 24 is guided to the second sub chamber 25b through the diffusion space 26 and adsorbed by the adsorbent C in the second sub chamber 25b.
When evaporated fuel is adsorbed on the adsorbent C, the temperature of the adsorbent C rises and the adsorption efficiency gradually decreases. However, since the heat storage material T is stored in the first heat storage material storage container 40 and the second heat storage material storage container 50 in the canister 20, when the temperature in the canister 20 rises and exceeds 18 ° C. When the heat storage material T melts, the heat of the adsorbent C is taken and the temperature rise of the adsorbent C is suppressed. For this reason, the adsorption efficiency fall of the fuel vapor of the adsorbent C can be suppressed.

また、エンジンの運転中は、吸気通路内の負圧がパージ通路からパージポート２４２を介してキャニスタ２０の主室２４、拡散空間２６、第２副室２５ｂ及び第１副室２５ａに加わる。これにより、図１の太線矢印に示すように、大気ポート２５１からキャニスタ２０の第１副室２５ａに空気が流入し、その空気が第２副室２５ｂ、拡散空間２６、主室２４を通り、パージポート２４２、パージ通路を介して吸気通路まで流れるようになる。これにより、キャニスタ２０の吸着材Ｃに吸着されている蒸発燃料がパージされ、そのパージされた蒸発燃料が空気と共に吸気通路内に導かれる。
前記蒸発燃料がパージされて吸着材Ｃから離脱すると、前記吸着材Ｃの温度が低下して蒸発燃料の離脱効率が徐々に低下する。しかし、キャニスタ２０内の温度が低下して18℃以下になると、蓄熱材Ｔが凝固する際に熱を放出し、吸着材Ｃの温度低下を抑える。このため、吸着材Ｃの蒸発燃料の離脱効率低下を抑制することができる。 Further, during operation of the engine, negative pressure in the intake passage is applied to the main chamber 24, the diffusion space 26, the second sub chamber 25b, and the first sub chamber 25a of the canister 20 through the purge port through the purge port 242. As a result, as shown by the thick arrows in FIG. 1, air flows from the atmospheric port 251 into the first sub chamber 25a of the canister 20, and the air passes through the second sub chamber 25b, the diffusion space 26, and the main chamber 24, It flows to the intake passage through the purge port 242 and the purge passage. Thus, the evaporated fuel adsorbed on the adsorbent C of the canister 20 is purged, and the purged evaporated fuel is guided into the intake passage together with air.
When the evaporative fuel is purged and desorbed from the adsorbent C, the temperature of the adsorbent C decreases, and the evaporative fuel desorption efficiency gradually decreases. However, when the temperature in the canister 20 decreases to 18 ° C. or less, heat is released when the heat storage material T solidifies, and the temperature decrease of the adsorbent C is suppressed. For this reason, it is possible to suppress a decrease in the evaporative fuel removal efficiency of the adsorbent C.

また、例えば、車両火災時等の熱で蓄熱材Ｔが気化することで第１蓄熱材収納容器４０等の内部圧力が上昇すると、上側パネル４２、下側パネル４４が膨らむように変形する。そして、上側パネル４２、下側パネル４４が膨らむように変形することで窪み部４５の溶接部位Ｗｔが蓄熱材Ｔの収納空間Ｓ内に突出し、これにより窪み部４５の溶接部位Ｗｔに応力が集中するようになる。この結果、窪み部４５の溶接部位Ｗｔに亀裂が生じ、その亀裂から内部圧力が逃がされる。これにより、車両火災時等における第１蓄熱材収納容器４０等の破裂を防止できるようになる。   Further, for example, when the internal pressure of the first heat storage material storage container 40 or the like rises due to the heat storage material T being vaporized by heat at the time of a vehicle fire or the like, the upper panel 42 and the lower panel 44 are deformed so as to swell. And the welding part Wt of the hollow part 45 protrudes in the storage space S of the thermal storage material T by deform | transforming so that the upper panel 42 and the lower panel 44 may swell, Thereby, stress concentrates on the welding part Wt of the hollow part 45. To come. As a result, a crack is generated in the welded portion Wt of the recess 45, and the internal pressure is released from the crack. Thereby, it becomes possible to prevent the first heat storage material storage container 40 and the like from being ruptured during a vehicle fire or the like.

＜蓄熱材収納容器４０，５０の長所について＞
本実施形態に係る蓄熱材収納容器４０，５０によると、上側パネル４２、下側パネル４４のパネル本体部４２１，４４１には、そのパネル本体部４２１，４４１が内圧上昇により膨らむように変形するときに、応力が集中し、亀裂が生じるように構成された応力集中部（窪み部４５の溶接部位Ｗｔ）が設けられている。このため、例えば、車両火災等の熱で蓄熱材収納容器４０，５０内の蓄熱材Ｔが気化し、内圧が上昇した場合に、前記応力集中部に応力が集中して亀裂が生じ、その亀裂から内部圧力が逃がされる。これにより、蓄熱材収納容器４０，５０の破裂を防止することができる。
また、応力集中部（窪み部４５の溶接部位Ｗｔ）は、前述のように、パネル本体部４２１，４４１が内圧上昇により膨らむように変形するときに応力が集中すれば良く、他の部分よりも強度を低くする必要がない。さらに、通常の使用状態では前記応力集中部に応力が集中することはない。このため、前記応力集中部を設けることで蓄熱材収納容器４０，５０の耐久性が低下することはない。
また、溶接部分を一部追加するだけで応力集中部を形成できるため、破裂防止対策用に別部材が必要なくなり、応力集中部を低コストで形成できるようになる。 <Advantages of heat storage material storage containers 40 and 50>
According to the heat storage material storage containers 40 and 50 according to the present embodiment, when the panel main body portions 421 and 441 of the upper panel 42 and the lower panel 44 are deformed so that the panel main body portions 421 and 441 swell due to an increase in internal pressure. In addition, a stress concentration portion (a welded portion Wt of the recess 45) configured to concentrate stress and generate a crack is provided. For this reason, for example, when the heat storage material T in the heat storage material storage containers 40 and 50 is vaporized by heat of a vehicle fire or the like and the internal pressure rises, stress concentrates on the stress concentration portion and a crack is generated. The internal pressure is relieved from. Thereby, rupture of the heat storage material storage containers 40 and 50 can be prevented.
Further, as described above, the stress concentration portion (the welded portion Wt of the hollow portion 45) is sufficient if the stress is concentrated when the panel main body portions 421 and 441 are deformed so as to swell due to the increase in internal pressure. There is no need to reduce the strength. Furthermore, stress does not concentrate on the stress concentration portion in a normal use state. For this reason, the durability of the heat storage material storage containers 40 and 50 is not lowered by providing the stress concentration portion.
Further, since the stress concentration portion can be formed by adding only a part of the welded portion, a separate member is not necessary for preventing bursting, and the stress concentration portion can be formed at low cost.

＜変更例＞
本発明は上記した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における変更が可能である。例えば、本実施形態では、溶接線Ｗの分岐部分Ｗｔを窪み部４５まで線状に延びるように設定する例を示した。しかし、図４（Ａ）に示すように、分岐部分Ｗｔを山形に設定し、その山の頂を窪み部４５の中央部に位置決めすることも可能である。
また、本実施形態では、窪み部４５の平面形状を角形に形成する例を示したが、図４（Ｂ）（Ｃ）に示すように、窪み部４５の平面形状を、例えば、扁平楕円形状に形成することも可能である。
また、本実施形態では、溶接線Ｗの枠状部分Ｗｋと分岐部分ｗｔとを連続させる例を示したが、図４（Ｄ）に示すように、分岐部分ｗｔを枠状部分Ｗｋから離すことも可能である。
さらに、本実施形態では、溶接線Ｗを枠状部分Ｗｋと分岐部分ｗｔとから構成する例を示したが、図４（Ｅ）に示すように、溶接線Ｗを枠状部分Ｗｋのみとし、フランジ部４２２を横断するように窪み部４５を形成することも可能である。
また、本実施形態では、蓄熱材収納容器４０，５０の材料として約0.6mmのステンレス板を使用する例を示したが、ステンレス板の代わりに鋼板等を使用することも可能である。
また、上側パネル４２、下側パネル４４の接合手段としてレーザ溶接を例示したが、レーザ溶接以外の接合手段を使用することも可能である。
さらに、上側パネル４２のフランジ部４２２に窪み部４５を形成する例を示したが、下側パネル４４のフランジ部４４２に窪み部４５を形成することも可能である。また、図２及び図４（Ａ）〜（Ｄ）においてフランジ部４２２，４４２の窪み部４５を省略することも可能である。 <Example of change>
The present invention is not limited to the above-described embodiment, and modifications can be made without departing from the gist of the present invention. For example, in this embodiment, the example which sets the branch part Wt of the welding line W so that it may extend linearly to the hollow part 45 was shown. However, as shown in FIG. 4A, it is also possible to set the branch portion Wt in a mountain shape and position the top of the mountain at the center of the recess 45.
Moreover, in this embodiment, although the example which forms the planar shape of the hollow part 45 in the square was shown, as shown to FIG. 4 (B) (C), the planar shape of the hollow part 45 is flat elliptical shape, for example It is also possible to form it.
In the present embodiment, the frame-shaped portion Wk of the weld line W and the branch portion wt are continuously shown. However, as shown in FIG. 4D, the branch portion wt is separated from the frame-shaped portion Wk. Is also possible.
Furthermore, in this embodiment, although the example which comprises the welding line W from the frame-shaped part Wk and the branch part wt was shown, as shown to FIG.4 (E), the welding line W shall be only the frame-shaped part Wk, It is also possible to form the recess 45 so as to cross the flange portion 422.
In the present embodiment, an example in which a stainless steel plate of about 0.6 mm is used as the material of the heat storage material storage containers 40 and 50 is shown, but a steel plate or the like can be used instead of the stainless steel plate.
Moreover, although laser welding was illustrated as a joining means of the upper panel 42 and the lower panel 44, joining means other than laser welding can also be used.
Furthermore, although the example which forms the hollow part 45 in the flange part 422 of the upper side panel 42 was shown, it is also possible to form the hollow part 45 in the flange part 442 of the lower side panel 44. FIG. Further, in FIG. 2 and FIGS. 4A to 4D, it is possible to omit the recess 45 of the flange portions 422 and 442.

本発明の実施形態１に係る蓄熱材収納容器を備えるキャニスタの平断面図である。It is a plane sectional view of a canister provided with the thermal storage material storage container concerning Embodiment 1 of the present invention. 蓄熱材収納容器の平面図（Ａ図）、Ａ図のＢ部拡大図（Ｂ図）である。It is a top view (A figure) of a thermal storage material storage container, and the B section enlarged view (B figure) of A figure. 図２（Ｂ）のＩＩＩ−ＩＩＩ矢視断面図である。It is the III-III arrow sectional drawing of FIG. 2 (B). 変更例に係る蓄熱材収納容器の部分拡大図（Ａ図）（Ｂ図）（Ｃ図）（Ｄ図）（Ｅ図）である。It is the elements on larger scale (A figure) (B figure) (C figure) (D figure) (E figure) of the thermal storage material storage container which concerns on the example of a change. 従来の蓄熱材収納容器を備えるキャニスタの平断面図である。It is a plane sectional view of a canister provided with the conventional heat storage material storage container.

符号の説明Explanation of symbols

２０・・・・キャニスタ
４０・・・・第１蓄熱材収納容器
４２・・・・上側パネル（壁部、容器構成部材）
４２１・・・パネル本体部（空間形成壁部）
４２２・・・フランジ部（合わせ部）
４５・・・・窪み部
４４・・・・下側パネル（壁部、容器構成部材）
４４１・・・パネル本体部（空間形成壁部）
４４２・・・フランジ部（合わせ部）
Ｃ・・・・・吸着材
Ｓ・・・・・収納空間
Ｔ・・・・・蓄熱材
Ｗ・・・・・溶接線（接合線）
Ｗｋ・・・・枠状部分
ｗｔ・・・・分岐部分
20 .... canister 40 ... first heat storage material storage container 42 ... upper panel (wall, container component)
421 ... Panel body (space forming wall)
422 ... Flange (matching part)
45 ··· depression 44 ··· lower panel (wall, container component)
441 ... Panel body (space forming wall)
442 ... Flange (matching part)
C ... Adsorbent S ... Storage space T ... Thermal storage material W ... Welding wire (joining wire)
Wk ... Frame-like part wt ... Branching part

Claims (2)

蒸発燃料用の吸着材が充填されるキャニスタ内に設置される構成で、前記吸着材から熱を奪い、あるいは前記吸着材に対して熱を供給可能な蓄熱材を収納する密閉式の蓄熱材収納容器であって、
前記蓄熱材の収納空間を構成する空間形成壁部と、その空間形成壁部を全周に亘って囲むよう形成された合わせ部とを備える複数の金属製の容器構成部材からなり、
前記各々の容器構成部材の合わせ部が相互に合わされた状態で、それらの合わせ部が接合線に沿ってレーザ溶接される構成であり、
前記接合線は前記容器構成部材の空間形成壁部を全周に亘って囲むように枠状に設定されて、一部の接合線が前記枠状に設定された接合線の内側に入り込んでおり、
前記容器構成部材により形成された前記蓄熱材の収納空間が内圧上昇により前記枠状の接合線に沿ってレーザ溶接された部位まで膨らむように変形することで、前記一部の接合線に沿ってレーザ溶接された部位が前記蓄熱材の収納空間内に突出し、これにより前記一部の接合線に沿ってレーザ溶接された部位に応力が集中し、その応力集中部に亀裂が生じるように構成されていることを特徴とする蓄熱材収納容器。 Enclosed heat storage material that is installed in a canister filled with an adsorbent for evaporative fuel and stores heat storage material that can take heat from the adsorbent or supply heat to the adsorbent A container,
It is composed of a plurality of metal container constituent members including a space forming wall portion that constitutes the storage space for the heat storage material, and a mating portion that is formed so as to surround the space forming wall portion over the entire circumference,
In a state in which the mating portions of the respective container constituent members are mated with each other, the mating portions are laser welded along a joining line,
The joining line is set in a frame shape so as to surround the space forming wall portion of the container constituent member over the entire circumference, and a part of the joining line enters the inside of the joining line set in the frame shape. ,
The storage space for the heat storage material formed by the container constituent member is deformed so as to swell to the site where laser welding is performed along the frame-shaped joint line due to an increase in internal pressure, thereby along the part of the joint line. The laser welded portion protrudes into the storage space for the heat storage material so that stress is concentrated on the laser welded portion along the part of the joining line, and a crack is generated in the stress concentration portion. The heat storage material storage container characterized by the above-mentioned. 請求項１に記載された蓄熱材収納容器であって、
前記容器構成部材の前記合わせ部には一部分に窪み部が形成されて、前記接合線の一部が前記窪み部と重なる位置に設定されており、
前記窪み部の位置の溶接部位が前記応力集中部となることを特徴とする蓄熱材収納容器。 The heat storage material storage container according to claim 1,
A recess is formed in part in the mating portion of the container component, and a part of the joining line is set at a position overlapping the recess.
The heat storage material storage container, wherein a welded portion at the position of the recess becomes the stress concentration portion .
JP2008300397A 2008-11-26 2008-11-26 Heat storage material storage container Expired - Fee Related JP5112267B2 (en)

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