JP5717436B2 - Evaporator with cool storage function - Google Patents
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- JP5717436B2 JP5717436B2 JP2010287770A JP2010287770A JP5717436B2 JP 5717436 B2 JP5717436 B2 JP 5717436B2 JP 2010287770 A JP2010287770 A JP 2010287770A JP 2010287770 A JP2010287770 A JP 2010287770A JP 5717436 B2 JP5717436 B2 JP 5717436B2
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- 239000011232 storage material Substances 0.000 claims description 156
- 239000003507 refrigerant Substances 0.000 claims description 88
- 239000000463 material Substances 0.000 claims description 32
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 claims description 25
- 238000009423 ventilation Methods 0.000 claims description 20
- 230000003247 decreasing effect Effects 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 description 41
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 40
- 238000005219 brazing Methods 0.000 description 12
- 239000007791 liquid phase Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- BGHCVCJVXZWKCC-UHFFFAOYSA-N tetradecane Chemical compound CCCCCCCCCCCCCC BGHCVCJVXZWKCC-UHFFFAOYSA-N 0.000 description 6
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- YCOZIPAWZNQLMR-UHFFFAOYSA-N pentadecane Chemical compound CCCCCCCCCCCCCCC YCOZIPAWZNQLMR-UHFFFAOYSA-N 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Air-Conditioning For Vehicles (AREA)
Description
この発明は、停車時に圧縮機の駆動源であるエンジンを一時的に停止させる車両のカーエアコンに用いられる蓄冷機能付きエバポレータに関する。 The present invention relates to an evaporator with a cold storage function used in a car air conditioner of a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.
この明細書および特許請求の範囲において、図１の上下を上下といい、風下側から風上側を見た際の左右、すなわち図１の左右を左右というものとする。 In this specification and claims, the top and bottom in FIG. 1 are referred to as top and bottom, and the left and right when viewing the windward side from the leeward side, that is, the left and right in FIG .
近年、環境保護や自動車の燃費向上などを目的として、信号待ちなどの停車時にエンジンを自動的に停止させる自動車が提案されている。 In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.
しかしながら、通常のカーエアコンにおいては、エンジンを停止させると、エンジンを駆動源とする圧縮機が停止するので、エバポレータに冷媒が供給されなくなり、冷房能力が急激に低下するという問題がある。 However, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that there is a problem that the refrigerant is not supplied to the evaporator and the cooling capacity is rapidly reduced.
そこで、このような問題を解決するために、エバポレータに蓄冷機能を付与し、エンジンが停止して圧縮機が停止した際に、エバポレータに蓄えられた冷熱を放冷して車室内を冷却することが考えられている。 Therefore, in order to solve such problems, the evaporator is provided with a cold storage function, and when the engine stops and the compressor stops, the cold stored in the evaporator is discharged to cool the vehicle interior. Is considered.
この種の蓄冷機能付きエバポレータとして、上下方向に間隔をおいて配置された１対のタンクと、両タンク間に、幅方向を通風方向に向けるとともにタンクの長さ方向に間隔をおいて配置され、かつ両端部がそれぞれ両タンクに通じさせられた複数の扁平状冷媒流通管と、上下方向にのびるとともに冷媒流通管に熱的に接触させられた複数の蓄冷材容器とを備えており、各蓄冷材容器が、１つの密閉された空間を有するとともに、当該空間内に潜熱蓄冷材が封入されており、蓄冷材容器内の蓄冷材が、冷媒流通管内を流れる冷媒の有する冷熱により冷却されるようになされている蓄冷機能付きエバポレータが提案されている（特許文献１参照）。 As an evaporator with this kind of cold storage function, a pair of tanks arranged at intervals in the vertical direction, and between the two tanks, the width direction is directed in the direction of ventilation and the tanks are arranged at intervals in the length direction. And a plurality of flat refrigerant flow pipes whose both ends are respectively communicated with both tanks, and a plurality of cold storage material containers that extend in the vertical direction and are in thermal contact with the refrigerant flow pipes, The regenerator container has one sealed space, and the latent heat regenerator material is enclosed in the space, and the regenerator material in the regenerator container is cooled by the cold heat of the refrigerant flowing in the refrigerant distribution pipe. An evaporator with a cold storage function that has been configured as described above has been proposed (see Patent Document 1).
特許文献１記載の蓄冷機能付きエバポレータによれば、圧縮機が作動している通常の冷房時には、冷媒流通管内を流れる冷媒の有する冷熱が、蓄冷材容器内の蓄冷材に伝わって蓄冷材に蓄えられ、圧縮機が停止した際には、蓄冷材容器内の蓄冷材に蓄えられた冷熱が、蓄冷材容器が熱的に接触させられた冷媒流通管を通って通風間隙に配置されたフィンに伝えられ、フィンから当該通風間隙を流れる空気に放冷されるようになっている。
According to the evaporator with the cold storage function described in
ところで、この種の蓄冷機能付きエバポレータの蓄冷材容器内に封入される蓄冷材としては、融点が５〜１０℃に調整されたパラフィン系の潜熱蓄熱材を用いるのが一般的である。たとえば特許文献１に記載された蓄冷機能付きエバポレータにおいても、蓄冷材容器内に封入される蓄冷材としては、融点が６℃であるテトラデカンが用いられている。
By the way, as a cool storage material enclosed in the cool storage material container of this kind of evaporator with a cool storage function, it is common to use the paraffin-type latent heat storage material in which melting | fusing point was adjusted to 5-10 degreeC. For example, also in the evaporator with a cool storage function described in
また、蓄冷材容器の強度は、通常の使用環境温度範囲、たとえば−４０〜９０℃の範囲内においては、液相状態の蓄冷材が密度変化するとともに、蓄冷材容器内に残存している空気が熱膨張することにより内圧が上昇したとしても、破損しないような強度に設計されている。しかしながら、周囲の温度が通常の使用環境温度範囲よりも高温になると、液相状態の蓄冷材の密度変化および蓄冷材容器内に残存している空気の熱膨張が顕著になり、蓄冷材容器における１つの密閉された空間の内容積に対する封入された蓄冷材の体積の比率である蓄冷材充填率によっては、蓄冷材容器が内圧により破損するおそれがある。 In addition, the strength of the cold storage material container is such that the liquid phase state of the cold storage material changes in density and the air remaining in the cold storage material container within a normal operating environment temperature range, for example, a range of −40 to 90 ° C. Even if the internal pressure increases due to thermal expansion, the strength is designed so as not to break. However, when the ambient temperature is higher than the normal operating environment temperature range, the density change of the cold storage material in the liquid phase and the thermal expansion of the air remaining in the cold storage container become noticeable. Depending on the cold storage material filling rate, which is the ratio of the volume of the enclosed cold storage material to the internal volume of one sealed space, the cold storage material container may be damaged by internal pressure.
したがって、安全性を考慮して、蓄冷材充填率を低くする必要があるが、この場合、蓄冷材容器の上側部分に蓄冷材の存在しない部分が生じることになる。したがって、蓄冷材容器の上側部分では冷熱を蓄えることができず、圧縮機が停止した際に、通風間隙における蓄冷材容器の上側部分に相当する部分を流れる空気の温度が速く上昇し、蓄冷機能付きエバポレータを通過する空気の温度である吐気温が大きくばらつくという問題がある。 Therefore, in consideration of safety, it is necessary to lower the cold storage material filling rate, but in this case, a portion where the cold storage material does not exist is generated in the upper portion of the cold storage material container. Therefore, the upper part of the cool storage material container cannot store cold heat, and when the compressor stops, the temperature of the air flowing through the part corresponding to the upper part of the cool storage material container in the ventilation gap quickly rises, and the cool storage function There is a problem that the temperature of air passing through the attached evaporator varies greatly.
この発明の目的は、上記問題を解決し、放冷時の吐気温のばらつきを抑制しうる蓄冷機能付きエバポレータを提供することにある。 The objective of this invention is providing the evaporator with a cool storage function which can solve the said problem and can suppress the dispersion | variation in the discharge temperature at the time of standing_to_cool.
本発明は、上記目的を達成するために以下の態様からなる。 In order to achieve the above object, the present invention comprises the following aspects.
1)上下方向にのびるとともに幅方向が通風方向を向き、かつ通風方向に間隔をおいて配置された２つの扁平状冷媒流通管からなる複数の管組が左右方向に間隔をおいて並列状に配置され、隣り合う管組どうしの間に間隙が形成され、全間隙のうちの一部の複数の間隙に蓄冷材が封入された扁平状蓄冷材容器が配置され、残りの間隙にアウターフィンが配置され、蓄冷材容器が、上下方向にのびるとともに幅方向が通風方向を向いた扁平状であり、蓄冷材容器内の蓄冷材が、冷媒流通管内を流れる冷媒の有する冷熱により冷却されるようになされている蓄冷機能付きエバポレータにおいて、
蓄冷材容器の下側でかつ通風方向に隣り合う２つの冷媒流通管間の隙間の中間部よりも風上側の部分のみに、蓄冷材容器の左右両側壁を部分的に内方に変形させることにより形成され、かつ蓄冷材容器の内容積を減少させる内容積減少部が設けられており、内容積減少部の左右両側面が風上側冷媒流通管から離隔している蓄冷機能付きエバポレータ。
1) A plurality of pipe sets composed of two flat refrigerant flow pipes extending in the vertical direction and having the width direction facing the ventilation direction and spaced apart in the ventilation direction are arranged in parallel in the left-right direction. A flat regenerator container in which a regenerator material is sealed in a plurality of gaps in a part of all the gaps, and outer fins are provided in the remaining gaps. The cool storage material container is arranged in a flat shape extending in the vertical direction and the width direction facing the ventilation direction, so that the cool storage material in the cool storage material container is cooled by the cold heat of the refrigerant flowing in the refrigerant circulation pipe. In an evaporator with a cold storage function,
The left and right side walls of the cool storage material container are partially deformed inwardly only in the portion on the windward side of the intermediate portion of the gap between the two refrigerant flow pipes adjacent to each other below the cool storage material container in the ventilation direction. The evaporator with a cool storage function is provided, and is provided with an internal volume reduction portion that reduces the internal volume of the cold storage material container , and the left and right side surfaces of the internal volume reduction portion are separated from the windward refrigerant circulation pipe .
2)蓄冷材容器の内容積減少部が、使用環境温度を超えた高温にさらされた際に、内圧の上昇により膨らむようになされている上記1)記載の蓄冷機能付きエバポレータ。 2) The evaporator with a cold storage function according to 1), wherein the internal volume decreasing portion of the cold storage material container is expanded by an increase in internal pressure when exposed to a high temperature exceeding the operating environment temperature.
3)蓄冷材容器内にインナーフィンが配置されるとともに、蓄冷材容器の左右両側壁にろう付されており、内容積減少部が設けられている箇所において、インナーフィンが座屈するように変形している上記1)または2)記載の蓄冷機能付きエバポレータ。 3) Inner fins are placed in the regenerator container and brazed to the left and right side walls of the regenerator container, and the inner fin is deformed so that it buckles at the location where the inner volume reduction part is provided. The evaporator with a cold storage function described in 1) or 2) above.
4)蓄冷材容器の内容積減少部よりも風下側の部分で、かつ風下側冷媒流通管に接している部分が、その全高にわたって風下側冷媒流通管に接合されている上記1)〜3)のうちのいずれかに記載の蓄冷機能付きエバポレータ。 4) The above-mentioned 1) to 3) , wherein the portion on the leeward side of the internal volume decreasing portion of the cold storage material container and the portion in contact with the leeward refrigerant circulation pipe is joined to the leeward refrigerant circulation pipe over its entire height. An evaporator with a cold storage function according to any one of the above.
上記1)〜4)の蓄冷機能付きエバポレータによれば、蓄冷材容器の下側でかつ通風方向に隣り合う２つの冷媒流通管間の隙間の中間部よりも風上側の部分のみに、蓄冷材容器の左右両側壁を部分的に内方に変形させることにより形成され、かつ蓄冷材容器の内容積を減少させる内容積減少部が設けられており、内容積減少部の左右両側面が風上側冷媒流通管から離隔しているので、蓄冷材容器の内容積が、内容積減少部が設けられていない場合に比べて小さくなる。その結果、蓄冷材容器内への蓄冷材の封入量を、内容積減少部が設けられていないと仮定した場合の適切な蓄冷材充填率（たとえば７０〜９０％）を得るための量としたとしても、蓄冷材は蓄冷材容器の上端近傍まで存在することになる。したがって、蓄冷材容器の上端近傍においても冷熱を蓄えることができ、圧縮機が停止した際に、隣り合う管組どうしの間隙における蓄冷材容器の上端近傍に相当する部分を流れる空気の温度上昇を抑制し、蓄冷機能付きエバポレータを通過する空気の温度ある吐気温のばらつきを抑制することができる。 According to the evaporator with a cool storage function of the above 1) to 4), the cool storage material is provided only on the windward side of the intermediate portion of the gap between the two refrigerant circulation pipes below the cool storage material container and adjacent to the ventilation direction. the left and right side walls of the container is formed by deforming partly inwardly and internal volume reduction portion that reduces the internal volume of the cold storage container is provided with left and right side surfaces of the inner volume decreasing portion windward Since it is separated from the refrigerant circulation pipe, the internal volume of the cold storage material container is smaller than that in the case where the internal volume reducing portion is not provided. As a result, the amount of the regenerator material enclosed in the regenerator material container is set to an amount for obtaining an appropriate regenerator material filling rate (for example, 70 to 90%) when it is assumed that the internal volume reduction portion is not provided. Even so, the regenerator material exists up to the vicinity of the upper end of the regenerator material container . Therefore, cold heat can be stored near the upper end of the cool storage material container , and when the compressor stops, the temperature rise of the air flowing through the portion corresponding to the vicinity of the upper end of the cool storage material container in the gap between adjacent pipe assemblies is increased. It is possible to suppress the variation of the temperature of the air passing through the evaporator with the cold storage function and the variation in the discharge temperature.
また、上記1)〜4)の蓄冷機能付きエバポレータにおいても、蓄冷材容器の強度は、通常の使用環境温度範囲、たとえば−４０〜９０℃の範囲内においては、液相状態の蓄冷材が密度変化するとともに、蓄冷材容器内に残存している空気が熱膨張することにより内圧が上昇したとしても、破損しないような強度に設計されている。そして、通常の使用環境温度範囲よりも高温、たとえば１００℃にさらされた場合には、液相状態の蓄冷材の密度変化および蓄冷材容器内に残存している空気の熱膨張が顕著になって蓄冷材容器の内圧が異常に上昇するが、この場合、蓄冷材容器の内容積減少部が膨らむように変形し、蓄冷材容器の内圧上昇による破損が防止される。しかも、内容積減少部の強度は他の部分よりも低下しているので、さらに高温にさらされた場合には、内容積減少部において蓄冷材容器が破損して蓄冷材が洩れることになるが、蓄冷材の洩れる箇所が決まっているので、洩れた蓄冷材に対策を比較的簡単に講じることができる。 Also, in the evaporator with the cold storage function of 1) to 4) above, the strength of the cold storage material container has a density of the cold storage material in the liquid phase in the normal use environment temperature range, for example, in the range of -40 to 90 ° C. It is designed to have such strength that it will not break even if the internal pressure rises due to thermal expansion of the air remaining in the cool storage material container . When exposed to a temperature higher than the normal operating environment temperature range, for example, 100 ° C., the density change of the cold storage material in the liquid phase and the thermal expansion of the air remaining in the cold storage material container become significant. the internal pressure of the cold storage container is abnormally elevated Te, but in this case, is deformed so as to expand the internal volume reduction of the cold storage container, breakage due to internal pressure rise of the cold storage container is prevented. In addition, since the strength of the inner volume reducing portion is lower than that of the other portions, when exposed to a higher temperature, the cold storage material container is damaged in the inner volume reducing portion and the cold storage material leaks. Since the location where the cold storage material leaks is determined, measures can be taken relatively easily for the leaked cold storage material.
上記1)〜4)の蓄冷機能付きエバポレータによれば、放冷時に、吐気温を、上下方向に関して一層均一化することができる。すなわち、蓄冷時には凝縮水が発生し、当該凝縮水は冷やされて冷熱を蓄えた状態で下方に流れるが、放冷時には冷やされた凝縮水に蓄えられた冷熱が隣り合う管組どうしの間隙を流れる空気に伝えられる。したがって、蓄冷材容器内に貯められた蓄冷材の量が上下方向に均一である場合、蓄冷材および凝縮水から隣り合う管組どうしの間隙の下側を流れる空気に伝えられる冷熱の量は、蓄冷材から隣り合う管組どうしの間隙の上側を流れる空気に伝えられる冷熱の量よりも多くなり、隣り合う管組どうしの間隙を流れる空気の温度が下側と上側とでは不均一になる。しかしながら、内容積減少部が、蓄冷材容器の下部に設けられていると、蓄冷材容器内の下側部分に貯められる蓄冷材の量が、上側部分に貯められる蓄冷材の量よりも少なくなり、蓄冷材に蓄えられる冷熱量が、上側部分が下側部分に比べて多くなる。その結果、蓄冷材および凝縮水から隣り合う管組どうしの間隙の下側を流れる空気に伝えられる冷熱の量と、蓄冷材から隣り合う管組どうしの間隙の上側を流れる空気に伝えられる冷熱の量とが均一化され、隣り合う管組どうしの間隙を流れる空気の温度も下側と上側とで均一になる。According to the evaporator with a cold storage function of the above 1) to 4), the temperature of the discharged air can be made more uniform in the vertical direction at the time of cooling. That is, condensate is generated during cold storage, and the condensate cools and flows downward in a state of storing cold heat. It is conveyed to the flowing air. Therefore, when the amount of the regenerator material stored in the regenerator material container is uniform in the vertical direction, the amount of cold heat transmitted from the regenerator material and condensed water to the air flowing under the gap between adjacent pipe assemblies is The amount of cold heat transferred from the cold storage material to the air flowing above the gap between adjacent tube sets becomes larger, and the temperature of the air flowing through the gap between adjacent tube sets becomes non-uniform between the lower side and the upper side. However, if the internal volume reduction part is provided in the lower part of the cool storage material container, the amount of the cool storage material stored in the lower part of the cool storage material container is smaller than the amount of the cool storage material stored in the upper part. The amount of cold heat stored in the cold storage material is larger in the upper part than in the lower part. As a result, the amount of cold transferred from the regenerator and condensed water to the air flowing below the gap between adjacent pipe assemblies and the amount of cold transferred from the regenerator to the air flowing above the gap between adjacent pipe sets. The amount of air is made uniform, and the temperature of the air flowing through the gap between adjacent tube sets is also made uniform between the lower side and the upper side.
上記1)〜4)の蓄冷機能付きエバポレータによれば、内容積減少部が、蓄冷材容器の風上側に設けられているので、蓄冷材容器に当たる空気の温度が比較的高くなっている風上側部分に存在する蓄冷材の量を減らすことができる。したがって、蓄冷材容器内の蓄冷材に冷熱を蓄える蓄冷効率の低下を抑制することができる。 According to the evaporator with a cold storage function of the above 1) to 4), since the internal volume reduction part is provided on the windward side of the cold storage material container, the temperature of the air hitting the cold storage material container is relatively high The amount of the regenerator material present in the part can be reduced. Therefore, the fall of the cool storage efficiency which stores cold heat in the cool storage material in a cool storage material container can be suppressed .
上記4)の蓄冷機能付きエバポレータによれば、蓄冷材容器の内容積減少部よりも風下側の部分で、かつ風下側冷媒流通管に接している部分が、その全高にわたって風下側冷媒流通管に接合されているので、蓄冷時には、冷媒流通管内を流れる冷媒から、蓄冷材容器内の蓄冷材に効率良く冷熱が伝わって蓄冷効率の低下を抑制することができる。また、圧縮機が停止した放冷時には、蓄冷材容器内の蓄冷材に蓄えられた冷熱が隣り合う管組どうしの間隙を流れる空気に効率良く伝わって、放冷効率の低下を抑制することができる。 According to the evaporator with a cold storage function of 4) above, the portion on the leeward side of the internal volume reduced portion of the cold storage material container and the portion that is in contact with the leeward refrigerant circulation tube is connected to the leeward refrigerant circulation tube over its entire height. Since it is joined, at the time of cold storage, cold heat can be efficiently transmitted from the refrigerant flowing in the refrigerant circulation pipe to the cold storage material in the cold storage material container, and a decrease in the cold storage efficiency can be suppressed. Also, when the compressor is allowed to cool, the cool heat stored in the cool storage material in the cool storage material container is efficiently transmitted to the air flowing through the gaps between adjacent pipe assemblies , thereby suppressing a decrease in the cool efficiency. Can
以下、この発明の実施形態を、図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
以下の説明において、通風方向下流側（図１および図２に矢印Ｘで示す方向）を前、これと反対側を後というものとする。また、前方から後方を見た際の左右、すなわち図１の左右を左右というものとする。 In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 and 2) is the front, and the opposite side is the rear. Further, the left and right when viewing the rear from the front, that is, the left and right in FIG.
さらに、以下の説明において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 Furthermore, in the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
図１はこの発明による蓄冷機能付きエバポレータの全体構成を示し、図２および図３はその要部の構成を示す。 FIG. 1 shows the overall configuration of an evaporator with a cold storage function according to the present invention, and FIGS. 2 and 3 show the configuration of the main part thereof.
図１において、蓄冷機能付きエバポレータ(1)は、上下方向に間隔をおいて配置された左右方向にのびるアルミニウム製第１ヘッダタンク(2)およびアルミニウム製第２ヘッダタンク(3)と、両ヘッダタンク(2)(3)間に設けられた熱交換コア部(4)とを備えている。 In FIG. 1, an evaporator with a cold storage function (1) includes an aluminum first header tank (2) and an aluminum second header tank (3) extending in the horizontal direction and spaced apart in the vertical direction, and both headers. And a heat exchange core part (4) provided between the tanks (2) and (3).
第１ヘッダタンク(2)は、前側（通風方向下流側）に位置する冷媒入口ヘッダ部(5)と、後側（通風方向上流側）に位置しかつ冷媒入口ヘッダ部(5)に一体化された冷媒出口ヘッダ部(6)とを備えている。冷媒入口ヘッダ部(5)の右端部に冷媒入口(7)が設けられ、冷媒出口ヘッダ部(6)の右端部に冷媒出口(8)が設けられている。第２ヘッダタンク(3)は、前側に位置する第１中間ヘッダ部(9)と、後側に位置しかつ第１中間ヘッダ部(9)に一体化された第２中間ヘッダ部(11)とを備えている。第２ヘッダタンク(3)の第１中間ヘッダ部(9)内と第２中間ヘッダ部(11)内とは、両中間ヘッダ部(9)(11)の右端部に跨って接合され、かつ内部が通路となった連通部材(12)を介して通じさせられている。 The first header tank (2) is integrated with the refrigerant inlet header (5) located on the front side (downstream in the ventilation direction) and the refrigerant inlet header (5) located on the rear side (upstream in the ventilation direction). And a refrigerant outlet header portion (6). A refrigerant inlet (7) is provided at the right end of the refrigerant inlet header (5), and a refrigerant outlet (8) is provided at the right end of the refrigerant outlet header (6). The second header tank (3) includes a first intermediate header portion (9) located on the front side and a second intermediate header portion (11) located on the rear side and integrated with the first intermediate header portion (9). And. The first intermediate header portion (9) and the second intermediate header portion (11) of the second header tank (3) are joined across the right end portions of the intermediate header portions (9) and (11), and The inside is communicated via a communication member (12) that forms a passage.
図１および図２に示すように、熱交換コア部(4)には、上下方向にのびるとともに幅方向が通風方向（前後方向）を向いた複数のアルミニウム押出形材製扁平状冷媒流通管(13)が、左右方向に間隔をおいて並列状に配置されている。すなわち、前後方向に間隔をおいて配置された複数、ここでは２つの冷媒流通管(13)からなる複数の組(14)が左右方向に間隔をおいて配置されており、前後の冷媒流通管(13)よりなる組(14)の隣り合うものどうしの間に間隙(15)が形成されている。前側の冷媒流通管(13)の上端部は冷媒入口ヘッダ部(5)に接続されるとともに、同下端部は第１中間ヘッダ部(9)に接続されている。また、後側の冷媒流通管(13)の上端部は冷媒出口ヘッダ部(6)に接続されるとともに、同下端部は第２中間ヘッダ部(11)に接続されている。 As shown in FIG. 1 and FIG. 2, the heat exchange core (4) has a plurality of extruded aluminum flat refrigerant flow pipes that extend in the vertical direction and whose width direction faces the ventilation direction (front-rear direction). 13) are arranged in parallel at intervals in the left-right direction. That is, a plurality of sets (14) composed of a plurality of refrigerant distribution pipes (13) arranged at intervals in the front-rear direction, here two refrigerant distribution pipes (13), are arranged at intervals in the left-right direction. A gap (15) is formed between adjacent ones of the group (14) consisting of (13). The upper end of the front refrigerant flow pipe (13) is connected to the refrigerant inlet header (5), and the lower end is connected to the first intermediate header (9). The upper end of the rear refrigerant flow pipe (13) is connected to the refrigerant outlet header (6), and the lower end is connected to the second intermediate header (11).
熱交換コア部(4)における全間隙(15)のうち一部の複数の間隙(15)でかつ隣接していない間隙(15)において、密閉状の内部空間(16a)内に蓄冷材（図示略）が封入されたアルミニウム製蓄冷材容器(16)が、前後両冷媒流通管(13)に跨るように配置されており、その結果蓄冷機能付きエバポレータ(1)は、互いに独立した密閉状の内部空間(16a)を有する複数の蓄冷材容器(16)を備えていることになる。そして、各蓄冷材容器(16)が、１つの密閉された内部空間(16a)を有しかつ当該内部空間(16a)内に蓄冷材が封入された蓄冷材封入部となるとともに、当該蓄冷材封入部の全体が蓄冷材を貯める蓄冷材貯留部となっている。また、残りの間隙(15)に、両面にろう材層を有するアルミニウムブレージングシートからなるコルゲート状のアウターフィン(17)が、前後両冷媒流通管(13)に跨るように配置されて間隙(15)を形成する左右両側の組(14)を構成する前後両冷媒流通管(13)にろう付されている。すなわち、蓄冷材容器(16)が配置された間隙(15)の両側の間隙(15)にそれぞれアウターフィン(17)が配置されている。また、左右両端の冷媒流通管(13)の組(14)の外側にも両面にろう材層を有するアルミニウムブレージングシートからなるアウターフィン(17)が配置されて前後両冷媒流通管(13)にろう付され、さらに左右両端のアウターフィン(17)の外側にアルミニウム製サイドプレート(18)が配置されてアウターフィン(17)にろう付されている。 Among the total gaps (15) in the heat exchange core part (4), some of the gaps (15) and non-adjacent gaps (15) have a cold storage material (shown in the sealed internal space (16a)). The aluminum regenerator material container (16) in which the abbreviation is enclosed is placed so as to straddle the front and rear refrigerant flow pipes (13). As a result, the evaporator (1) with the regenerator function A plurality of cold storage material containers (16) having an internal space (16a) are provided. Each regenerator material container (16) has a sealed internal space (16a) and becomes a regenerator material enclosing portion in which the regenerator material is enclosed in the internal space (16a), and the regenerator material The whole enclosure part is a cold storage material storage part which stores a cold storage material. Further, the remaining gap (15), corrugated outer fins made of aluminum brazing sheet (17) is disposed so as to straddle the front and rear refrigerant flow tube (13) a gap (15 having a brazing material layer over opposite surfaces ) Is brazed to the front and rear refrigerant flow pipes (13) constituting the pair (14) on both the left and right sides. That is, the outer fins (17) are arranged in the gaps (15) on both sides of the gap (15) in which the cool storage material container (16) is arranged. In addition, outer fins (17) made of an aluminum brazing sheet having a brazing filler metal layer on both sides are also arranged outside the set (14) of the refrigerant flow pipes (13) at the left and right ends, and the front and rear refrigerant flow pipes (13) are arranged. An aluminum side plate (18) is disposed outside the outer fins (17) at both the left and right ends and brazed to the outer fins (17).
蓄冷材容器(16)は幅方向を前後方向に向けた扁平状であり、前側冷媒流通管(13)の前側縁よりも後方に位置し、かつ各組(14)の前後２つの冷媒流通管(13)にろう付された容器本体部(19)と、容器本体部(19)の前側縁部（風下側縁部）に連なるとともに前側冷媒流通管(13)の前側縁よりも前方（通風方向外側）に張り出すように設けられた外方張り出し部(21)とを備えている。蓄冷材容器(16)の容器本体部(19)の左右方向の寸法は全体に等しくなっている。蓄冷材容器(16)の外方張り出し部(21)は、上下方向の寸法が容器本体部(19)の上下方向の寸法と等しく、かつ左右方向の寸法が容器本体部(19)の左右方向の寸法よりも大きくなっており、容器本体部(19)に対して左右方向外方に膨出している。外方張り出し部(21)の左右方向の寸法は、冷媒流通管(13)の左右方向の寸法である管高さの２倍に、蓄冷材容器(16)の容器本体部(19)の左右方向の寸法を加えた高さと等しくなっている。 The cold storage material container (16) has a flat shape with the width direction directed in the front-rear direction, is located behind the front edge of the front refrigerant flow pipe (13), and has two refrigerant flow pipes in the front and rear of each set (14). (13) Brazed to the container body (19) and the front edge (leeward edge) of the container body (19) and forward of the front edge of the front refrigerant flow pipe (13) (ventilation) And an outward projecting portion (21) provided so as to project outward (outward in the direction). The horizontal dimension of the container main body (19) of the cold storage material container (16) is the same as the whole. The outwardly projecting portion (21) of the cold storage material container (16) has the vertical dimension equal to the vertical dimension of the container main body (19) and the horizontal dimension of the container main body (19) in the horizontal direction. And is bulging outward in the left-right direction with respect to the container body (19). The lateral dimension of the outward projecting part (21) is twice the pipe height, which is the lateral dimension of the refrigerant flow pipe (13), and the right and left dimensions of the container body (19) of the regenerator container (16). It is equal to the height plus the dimension in the direction.
蓄冷材容器(16)内には、容器本体部(19)の後端部から外方張り出し部(21)の前端部に至るアルミニウム製インナーフィン(22)が、上下方向のほぼ全体にわたって配置されている。インナーフィン(22)は、前後方向にのびる波頂部、前後方向にのびる波底部、および波頂部と波底部とを連結する連結部よりなるコルゲート状である。インナーフィン(22)のフィン高さは全体に等しく、蓄冷材容器(16)の容器本体部(19)の左右両側壁内面にろう付されている。 Inside the cool storage material container (16), aluminum inner fins (22) extending from the rear end of the container main body (19) to the front end of the outwardly projecting portion (21) are arranged over substantially the entire vertical direction. ing. The inner fin (22) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The fins of the inner fins (22) have the same overall height, and are brazed to the inner surfaces of the left and right side walls of the container main body (19) of the cool storage material container (16).
蓄冷材容器(16)の容器本体部(19)の下側で、かつ前後両冷媒流通管(13)間の隙間の中間部よりも風上側の部分に、蓄冷材容器(16)の左右両側壁(16b)を内方に変形させることにより形成され、かつ蓄冷材容器(16)の内容積を減少させる内容積減少部(23)が設けられている。内容積減少部(23)の左右方向の寸法は、容器本体部(19)の左右方向の寸法よりも小さくなっており、蓄冷材容器(16)の内容積は、内容積減少部(23)が設けられていないと仮定した場合に比べて小さくなっている。蓄冷材容器(16)における内容積減少部(23)によって減少させられる内容積量は、内容積減少部(23)が設けられていないと仮定した場合、すなわち容器本体部(19)の左右方向の厚みが全体に等しいと仮定した場合の蓄冷材充填率（蓄冷材容器(16)の密閉された内部空間(16a)の内容積に対する封入された蓄冷材の体積の比率）が７０〜９０％、好ましくは７０〜８０％であっても、蓄冷材が蓄冷材容器(16)の上端近傍まで存在するように決められる。 The left and right sides of the cool storage material container (16) on the lower side of the container main body (19) of the cool storage material container (16) and on the windward side of the middle part of the gap between the front and rear refrigerant flow pipes (13) An internal volume reduction part (23) is provided which is formed by deforming the wall (16b) inward and reduces the internal volume of the cold storage material container (16). The left-right dimension of the inner volume reducing part (23) is smaller than the left-right dimension of the container body part (19), and the inner volume of the cold storage container (16) is smaller than the inner volume reducing part (23). It is smaller than the case where it is assumed that is not provided. The amount of internal volume that can be reduced by the internal volume reduction part (23) in the cold storage material container (16) assumes that the internal volume reduction part (23) is not provided, that is, the left-right direction of the container body part (19) The regenerator filling rate (the ratio of the volume of the enclosed regenerator to the inner volume of the sealed internal space (16a) of the regenerator container (16)) is assumed to be 70 to 90% when the thickness of the regenerator is assumed to be equal to the whole Even if it is preferably 70 to 80%, it is determined that the cold storage material exists up to the vicinity of the upper end of the cold storage material container (16).
また、内容積減少部(23)が設けられている箇所においては、インナーフィン(22)は座屈するように変形しており、蓄冷材容器(16)における内容積減少部(23)が設けられた部分の強度が低下している。但し、蓄冷材容器(16)の強度は、通常の使用環境温度範囲、たとえば−４０〜９０℃の範囲内においては、液相状態の蓄冷材が密度変化するとともに、蓄冷材容器(16)内に残存している空気が熱膨張することにより内圧が上昇したとしても、破損しないような強度に設計されている。 Further, the inner fin (22) is deformed so as to buckle at the location where the inner volume reducing portion (23) is provided, and the inner volume reducing portion (23) in the cold storage material container (16) is provided. The strength of the part has decreased. However, the strength of the regenerator container (16) is such that the density of the regenerator material in the liquid phase changes within the normal operating environment temperature range, for example, the range of -40 to 90 ° C, and the regenerator material container (16) Even if the internal pressure rises due to thermal expansion of the remaining air, the strength is designed so as not to break.
蓄冷材容器(16)は、容器本体部(19)における内容積減少部(23)よりも前方の部分で、かつ前側の冷媒流通管(13)に接している部分が、全高にわたって冷媒流通管(13)にろう付されている。 The cool storage material container (16) is a part of the container main body part (19) that is in front of the inner volume reduction part (23) and that is in contact with the refrigerant circulation pipe (13) on the front side, and that has a refrigerant circulation pipe over the entire height. (13) is brazed.
蓄冷材容器(16)内へ充填される蓄冷材としては、凝固点が５〜１０℃程度に調整されたパラフィン系潜熱蓄冷材が用いられる。具体的には、ペンタデカン、テトラデカンなどが用いられる。蓄冷材は、蓄冷材容器(16)の上端近傍まで存在するように蓄冷材容器(16)内に封入されている。 As the regenerator material filled in the regenerator material container (16), a paraffin-based latent heat regenerator material whose freezing point is adjusted to about 5 to 10 ° C is used. Specifically, pentadecane, tetradecane, or the like is used. The cold storage material is enclosed in the cold storage material container (16) so as to exist up to the vicinity of the upper end of the cold storage material container (16).
図３に示すように、蓄冷材容器(16)は、両面にろう材層を有するアルミニウムブレージングシートにプレス加工が施されることにより形成され、かつ周縁部どうしが互いにろう付された２枚の略縦長方形状アルミニウム板(24)(25)よりなる。蓄冷材容器(16)を構成する右側のアルミニウム板(24)における容器本体部(19)を形成する部分、すなわち前側部分を除いた大部分には、右方に膨出した第１膨出部(26)が設けられ、同じく外方張り出し部(21)を形成する部分、すなわち前側部分には、第１膨出部(26)の前側に連なるとともに右方に膨出し、かつ第１膨出部(26)よりも膨出高さの高い第２膨出部(27)が、上下方向の全長にわたって設けられている。蓄冷材容器(16)を構成する左側のアルミニウム板(25)は、右側アルミニウム板(24)を左右逆向きにしたものであり、同一部分には同一符号を付す。両アルミニウム板(24)(25)の第１膨出部(26)の膨出頂壁(26a)は、それぞれ内方に凹まされており、これにより膨出頂壁(26a)に凹陥部(28)が設けられている。 As shown in FIG. 3, the cold storage material container (16) is formed by pressing aluminum brazing sheets having a brazing filler metal layer on both sides, and the peripheral portions are brazed to each other. It consists of substantially vertical rectangular aluminum plates (24) and (25). The portion of the right aluminum plate (24) that constitutes the cold storage material container (16) that forms the container body (19), that is, most of the portion excluding the front portion, is bulged to the right. (26) is provided, and the portion that also forms the outward projecting portion (21), that is, the front side portion, is connected to the front side of the first bulging portion (26) and bulges to the right, and the first bulging portion A second bulge portion (27) having a bulge height higher than that of the portion (26) is provided over the entire length in the vertical direction. The left aluminum plate (25) constituting the cold storage material container (16) is the right aluminum plate (24) reversed in the left-right direction, and the same parts are denoted by the same reference numerals. The bulging top walls (26a) of the first bulging portions (26) of both the aluminum plates (24) and (25) are respectively recessed inwardly, and thereby the bulging top walls (26a) are recessed ( 28) is provided.
そして、２枚のアルミニウム板(24)(25)を、インナーフィン(22)を間に挟んで第１および第２膨出部(26)(27)の開口どうしが対向するように組み合わせ、この状態でろう付することによって蓄冷材容器(16)が形成されている。ここで、両アルミニウム板(24)(25)の第１膨出部(26)により容器本体部(19)が形成され、第２膨出部(27)により外方張り出し部(21)が形成されており、両アルミニウム板(24)(25)の凹陥部(28)により内容積減少部(23)が形成されている。なお、内容積減少部(23)は、両アルミニウム板(24)(25)をろう付した後に、両アルミニウム板(24)(25)の第１膨出部(26)の膨出頂壁(26a)をそれぞれ内方に凹ませて凹陥部(28)を設けることにより形成してもよい。 Then, the two aluminum plates (24) and (25) are combined so that the openings of the first and second bulge portions (26) and (27) face each other with the inner fin (22) interposed therebetween. The cold storage material container (16) is formed by brazing in a state. Here, the container body part (19) is formed by the first bulging part (26) of both aluminum plates (24) and (25), and the outwardly projecting part (21) is formed by the second bulging part (27). The inner volume reducing portion (23) is formed by the recessed portions (28) of the aluminum plates (24) and (25). The inner volume reducing portion (23) is formed by brazing the two aluminum plates (24) and (25), and then bulging the top wall (1) of the first bulging portion (26) of both the aluminum plates (24) and (25). 26a) may be formed by indenting inwardly and providing a recess (28).
アウターフィン(17)は、前後方向にのびる波頂部、前後方向にのびる波底部、および波頂部と波底部とを連結する連結部よりなるコルゲート状である。アウターフィン(17)は、前側冷媒流通管(13)の前側縁よりも後方に位置し、かつ各組(14)の前後の冷媒流通管(13)にろう付されたフィン本体部(31)と、フィン本体部(31)の前側縁に連なるとともに後側冷媒流通管(13)の前側縁よりも前方に張り出すように設けられた外方張り出し部(32)とを備えている。そして、蓄冷材容器(16)が配置された間隙(15)の両隣の間隙(15)に配置されたアウターフィン(17)の外方張り出し部(32)が、蓄冷材容器(16)の外方張り出し部(21)の左右両側面にろう付されている。また、隣接するアウターフィン(17)の外方張り出し部(32)間にはアルミニウム製スペーサ(33)が配置されており、外方張り出し部(32)にろう付されている。 The outer fin (17) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The outer fin (17) is located behind the front edge of the front refrigerant flow pipe (13) and is finned to the refrigerant flow pipe (13) before and after each set (14) by the fin main body (31) And an outwardly projecting portion (32) provided so as to extend forward of the front side edge of the rear refrigerant flow pipe (13) while continuing to the front side edge of the fin body portion (31). The outward projecting portion of the outer fin disposed in the gap (15) on both sides of the cold storage container (16) is arranged a gap (15) (17) (32), out of the cold storage container (16) It is brazed to the left and right side surfaces of the side projecting portion (21). An aluminum spacer (33) is disposed between the outwardly projecting portions (32) of the adjacent outer fins (17), and is brazed to the outwardly projecting portion (32).
上述した蓄冷機能付きエバポレータ(1)は、車両のエンジンを駆動源とする圧縮機、圧縮機から吐出された冷媒を冷却するコンデンサ（冷媒冷却器）、コンデンサを通過した冷媒を減圧する膨張弁（減圧器）とともに冷凍サイクルを構成し、カーエアコンとして、停車時に圧縮機の駆動源であるエンジンを一時的に停止させる車両、たとえば自動車に搭載される。そして、圧縮機が作動している場合には、圧縮機で圧縮されてコンデンサおよび膨張弁を通過した低圧の気液混相の２相冷媒が、冷媒入口(7)を通って蓄冷機能付きエバポレータ(1)の冷媒入口ヘッダ部(5)内に入り、前側の全冷媒流通管(13)を通って第１中間ヘッダ部(9)内に流入する。第１中間ヘッダ部(9)内に入った冷媒は、連通部材(12)を通って第２中間ヘッダ部(11)内に入った後、後側の全冷媒流通管(13)を通って出口ヘッダ部(6)内に流入し、冷媒出口(8)から流出する。そして、冷媒が冷媒流通管(13)内を流れる間に、間隙(15)を通過する空気と熱交換をし、冷媒は気相となって流出する。 The evaporator with a cold storage function (1) described above includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that depressurizes the refrigerant that has passed through the condenser ( A refrigeration cycle is configured together with a decompressor, and is mounted as a car air conditioner on a vehicle, such as an automobile, that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and has an evaporator with a cold storage function ( The refrigerant enters the refrigerant inlet header part (5) of 1) and flows into the first intermediate header part (9) through the front all refrigerant circulation pipe (13). The refrigerant that has entered the first intermediate header portion (9) passes through the communication member (12), enters the second intermediate header portion (11), and then passes through the rear refrigerant flow pipe (13). It flows into the outlet header (6) and flows out from the refrigerant outlet (8). And while a refrigerant | coolant flows through the inside of a refrigerant | coolant distribution pipe (13), it heat-exchanges with the air which passes a clearance gap (15), and a refrigerant | coolant flows out into a gaseous phase.
このとき、冷媒流通管(13)内を流れる冷媒の有する冷熱によって蓄冷材容器(16)の容器本体部(19)内の蓄冷材が冷却され、さらに容器本体部(19)内の冷却された蓄冷材の有する冷熱がインナーフィン(22)を介して蓄冷材容器(16)の外方張り出し部(21)内の蓄冷材に伝えられるとともに、間隙(15)を通って冷媒により冷やされた空気の有する冷熱が外方張り出し部(21)内の蓄冷材に伝えられ、その結果蓄冷材容器(16)内全体の蓄冷材に冷熱が蓄えられる。 At this time, the cold storage material in the container main body (19) of the cold storage material container (16) is cooled by the cold heat of the refrigerant flowing in the refrigerant flow pipe (13), and further the cooling in the container main body (19). The cold heat of the regenerator material is transmitted to the regenerator material in the outwardly projecting portion (21) of the regenerator material container (16) via the inner fin (22), and the air cooled by the refrigerant through the gap (15) Is transmitted to the cold storage material in the outwardly projecting portion (21), and as a result, cold heat is stored in the entire cold storage material in the cold storage material container (16).
圧縮機が停止した場合には、蓄冷材容器(16)の容器本体部(19)および外方張り出し部(21)内の蓄冷材の有する冷熱が、インナーフィン(22)を介して容器本体部(19)および外方張り出し部(21)の左右両側壁に伝えられる。容器本体部(19)の左右両側壁に伝えられた冷熱は、冷媒流通管(13)を通過し、当該冷媒流通管(13)にろう付されているアウターフィン(17)のフィン本体部(31)を介して蓄冷材容器(16)が配置されている間隙(15)の両隣の間隙(15)を通過する空気に伝えられる。外方張り出し部(21)の左右両側壁に伝えられた冷熱は、外方張り出し部(21)の左右両側面にろう付されたアウターフィン(17)の外方張り出し部(32)を介して間隙(15)を通過する空気に伝えられる。したがって、エバポレータ(1)を通過した風の温度が上昇したとしても、当該風は冷却されるので、冷房能力の急激な低下が防止される。 When the compressor is stopped, the cold heat of the cold storage material in the container main body portion (19) and the outwardly projecting portion (21) of the cold storage material container (16) is transferred to the container main body portion via the inner fin (22). (19) and the left and right side walls of the outward projection (21). Cold heat transmitted to the left and right side walls of the container main body (19) passes through the refrigerant flow pipe (13), and the fin main body (17) of the outer fin (17) brazed to the refrigerant flow pipe (13) ( 31) via the cold storage container (16) is transmitted to the air passing through the gap (15) on both sides of the gap (15) being arranged. The cold heat transmitted to the left and right side walls of the outward projecting part (21) passes through the outer projecting part (32) of the outer fin (17) brazed to the left and right side surfaces of the outer projecting part (21). It is transmitted to the air passing through the gap (15). Therefore, even if the temperature of the wind that has passed through the evaporator (1) rises, the wind is cooled, so that a rapid decrease in the cooling capacity is prevented.
そして、蓄冷材容器(16)における蓄冷材が存在している部分に、蓄冷材容器(16)の左右両側壁(16b)を部分的に内方に変形させることにより形成され、かつ蓄冷材容器(16)の内容積を減少させる内容積減少部(23)が設けられているので、蓄冷材容器(16)内への蓄冷材の封入量を、内容積減少部(23)が設けられていないと仮定した場合の適切な蓄冷材充填率（たとえば７０〜９０％）を得るための量としたとしても、蓄冷材は蓄冷材容器(16)の上端近傍まで存在することになる。したがって、蓄冷材容器(16)の上端近傍においても冷熱を蓄えることができ、圧縮機が停止した際に、間隙における蓄冷材容器(16)の上端近傍に相当する部分を流れる空気の温度上昇を抑制し、蓄冷機能付きエバポレータを通過する空気の温度ある吐気温のばらつきを抑制することができる。 And in the part where the cool storage material exists in the cool storage material container (16), the left and right side walls (16b) of the cool storage material container (16) are partially deformed inward, and the cool storage material container Since the internal volume reduction part (23) for reducing the internal volume of (16) is provided, the internal volume reduction part (23) is provided for the amount of cooling storage material enclosed in the cold storage material container (16). Even if it is set as an amount for obtaining an appropriate cold storage material filling rate (for example, 70 to 90%) when it is assumed that there is no cold storage material, the cold storage material exists up to the vicinity of the upper end of the cold storage material container (16). Therefore, cold heat can be stored near the upper end of the cool storage material container (16), and when the compressor stops, the temperature rise of the air flowing through the portion corresponding to the vicinity of the upper end of the cool storage material container (16) in the gap is increased. It is possible to suppress the variation of the temperature of the air passing through the evaporator with the cold storage function and the variation in the discharge temperature.
また、周囲の温度が通常の使用環境温度範囲よりも高温、たとえば１００℃になると、液相状態の蓄冷材の密度変化および蓄冷材容器(16)内に残存している空気の熱膨張が顕著になって、蓄冷材容器(16)の内圧が異常に上昇するが、この場合、蓄冷材容器(16)の内容積減少部(23)が膨らむように変形し、蓄冷材容器(16)の内圧上昇による破損が防止される。しかも、内容積減少部(23)の強度は他の部分よりも低下しているので、周囲の温度がさらに高温になった場合には、内容積減少部(23)において蓄冷材容器(16)が破損して蓄冷材が洩れることになるが、蓄冷材の洩れる箇所が決まっているので、洩れた蓄冷材に対策を比較的簡単に講じることができる。 Further, when the ambient temperature is higher than the normal operating environment temperature range, for example, 100 ° C., the density change of the cold storage material in the liquid phase and the thermal expansion of the air remaining in the cold storage container (16) are remarkable. Thus, the internal pressure of the cool storage material container (16) rises abnormally, but in this case, the internal volume reduction part (23) of the cool storage material container (16) is deformed so as to expand, and the cool storage material container (16) Damage due to increase in internal pressure is prevented. Moreover, since the strength of the internal volume reduction part (23) is lower than the other parts, when the ambient temperature becomes even higher, the cold storage container (16) in the internal volume reduction part (23) The cool storage material leaks due to damage, but since the location where the cool storage material leaks is determined, measures can be taken relatively easily for the leaked cool storage material.
図４はこの発明による蓄冷機能付きエバポレータの他の実施形態を示す。 FIG. 4 shows another embodiment of an evaporator with a cold storage function according to the present invention.
図４において、熱交換コア部(4)における前後２つの冷媒流通管(13)からなる各組(14)の片面、ここでは左側面側に、各組(14)の２つの冷媒流通管(13)に跨るように、密閉状の内部空間(40a)内に蓄冷材（図示略）が封入されたアルミニウム製蓄冷材容器(40)が配置されており、その結果蓄冷機能付きエバポレータは、互いに独立した密閉状の内部空間(40a)を有する複数の蓄冷材容器(40)を備えていることになる。そして、各蓄冷材容器(40)が、１つの密閉された内部空間(40a)を有しかつ当該内部空間(40a)内に蓄冷材が封入された蓄冷材封入部となるとともに、当該蓄冷材封入部の全体が蓄冷材を貯める蓄冷材貯留部となっている。 In FIG. 4, two refrigerant distribution pipes (14) of each group (14) are provided on one side of each set (14) consisting of two refrigerant flow pipes (13) before and after the heat exchange core (4), here on the left side. 13) An aluminum regenerator container (40) in which a regenerator material (not shown) is enclosed is disposed in a sealed internal space (40a) so as to straddle 13). A plurality of regenerator containers (40) having independent sealed internal spaces (40a) are provided. Each regenerator material container (40) has a sealed internal space (40a) and becomes a regenerator material enclosing portion in which the regenerator material is enclosed in the internal space (40a), and the regenerator material The whole enclosure part is a cold storage material storage part which stores a cold storage material.
蓄冷材容器(40)は幅方向を前後方向に向けた扁平状であり、前側冷媒流通管(13)の前側縁よりも後方に位置し、かつ各組(14)の前後の冷媒流通管(13)にろう付された容器本体部(42)と、容器本体部(42)の前側縁に連なるとともに前側冷媒流通管(13)よりも前方に張り出すように設けられ、かつ左右方向の寸法が容器本体部(42)の左右方向の寸法よりも高くなった外方張り出し部(43)とよりなる。容器本体部(42)の左右方向の寸法は全体に等しくなっている。外方張り出し部(43)の左右方向の寸法は、冷媒流通管(13)の左右方向の寸法である管高さに、蓄冷材容器(40)の容器本体部(42)の厚み方向の寸法を加えた高さと等しくなっている。外方張り出し部(43)は、容器本体部(42)対して右方のみに膨出しており、容器本体部(42)および外方張り出し部(43)の左側面は面一である。 The cool storage material container (40) has a flat shape with the width direction directed in the front-rear direction, is located behind the front edge of the front refrigerant flow pipe (13), and the refrigerant flow pipes before and after each set (14) ( 13) brazed to the container main body (42), connected to the front edge of the container main body (42) and projecting forward from the front refrigerant flow pipe (13), and the dimensions in the left-right direction Consists of an outwardly projecting portion (43) that is higher than the horizontal dimension of the container body (42). The dimensions of the container main body (42) in the left-right direction are the same as the whole. The dimension in the left-right direction of the outward projecting part (43) is the dimension in the thickness direction of the container body part (42) of the regenerator container (40) to the pipe height that is the dimension in the left-right direction of the refrigerant flow pipe (13). It is equal to the height added. The outward projecting portion (43) bulges only to the right with respect to the container body portion (42), and the left side surfaces of the container body portion (42) and the outward projecting portion (43) are flush with each other.
蓄冷材容器(40)内には、容器本体部(42)の後端部から外方張り出し部(43)の前端部に至るアルミニウム製インナーフィン(44)が、上下方向のほぼ全体にわたって配置されている。インナーフィン(44)は、前後方向にのびる波頂部、前後方向にのびる波底部、および波頂部と波底部とを連結する連結部よりなるコルゲート状である。インナーフィン(44)のフィン高さは全体に等しく、蓄冷材容器(40)の容器本体部(42)および外方張り出し部(43)の左側壁内面と、容器本体部(42)の右側壁内面とにろう付されている。 Inside the cool storage material container (40), aluminum inner fins (44) extending from the rear end portion of the container main body portion (42) to the front end portion of the outwardly projecting portion (43) are arranged over substantially the entire vertical direction. ing. The inner fin (44) has a corrugated shape including a wave crest extending in the front-rear direction, a wave bottom extending in the front-rear direction, and a connecting portion connecting the wave crest and the wave bottom. The fin height of the inner fin (44) is the same as the whole, the inner surface of the left side wall of the container body (42) and the outwardly projecting part (43) of the cold storage material container (40), and the right side wall of the container body (42) It is brazed to the inner surface.
蓄冷材容器(40)の容器本体部(42)の下側部分で、かつ前後両冷媒流通管(13)間の隙間の中間部よりも風上側の部分に、蓄冷材容器(40)の一方の壁、ここでは左側壁を内方に変形させることにより形成され、かつ蓄冷材容器(40)の内容積を減少させる内容積減少部(45)が設けられている。内容積減少部(45)の左右方向の寸法は、容器本体部(42)の左右方向の寸法よりも小さくなっており、蓄冷材容器(40)の内容積は、内容積減少部(45)が設けられていないと仮定した場合に比べて小さくなっている。蓄冷材容器(40)における内容積減少部(45)によって減少させられる内容積量は、内容積減少部(45)が設けられていないと仮定した場合、すなわち容器本体部(42)の左右方向の厚みが全体に等しいと仮定した場合の蓄冷材充填率（蓄冷材容器(40)の密閉された内部空間(40a)の内容積に対する封入された蓄冷材の体積の比率）が７０〜９０％、好ましくは７０〜８０％であっても、蓄冷材が蓄冷材容器(40)の上端近傍まで存在するように決められる。 One side of the regenerator container (40) is disposed on the lower part of the container main body (42) of the regenerator container (40) and on the windward side of the middle part of the gap between the front and rear refrigerant flow pipes (13). An inner volume reducing portion (45) is provided which is formed by deforming the inner wall, here the left side wall inward, and reduces the inner volume of the cool storage material container (40). The left-right dimension of the inner volume reduction part (45) is smaller than the left-right dimension of the container body part (42), and the inner volume of the cold storage container (40) is smaller than the inner volume reduction part (45). It is smaller than the case where it is assumed that is not provided. The amount of the internal volume that can be reduced by the internal volume reduction part (45) in the cold storage material container (40) is assumed that the internal volume reduction part (45) is not provided, that is, the horizontal direction of the container main body part (42). The regenerator filling rate (the ratio of the volume of the enclosed regenerator to the inner volume of the sealed internal space (40a) of the regenerator container (40)) is assumed to be 70 to 90% when the thickness of the regenerator is assumed to be equal to the whole Even if it is preferably 70 to 80%, it is determined that the cold storage material exists up to the vicinity of the upper end of the cold storage material container (40).
また、内容積減少部(45)が設けられている箇所においては、インナーフィン(44)は座屈するように変形しており、蓄冷材容器(40)における内容積減少部(45)が設けられた部分の強度が低下している。但し、蓄冷材容器(40)の強度は、通常の使用環境温度範囲、たとえば−４０〜９０℃の範囲内においては、液相状態の蓄冷材が密度変化するとともに、蓄冷材容器(40)内に残存している空気が熱膨張することにより内圧が上昇したとしても、破損しないような強度に設計されている。 Further, the inner fin (44) is deformed so as to buckle at the location where the inner volume reducing portion (45) is provided, and the inner volume reducing portion (45) in the cold storage material container (40) is provided. The strength of the part has decreased. However, the strength of the cool storage material container (40) is such that the density of the cool storage material in the liquid phase changes within the normal operating environment temperature range, for example, in the range of -40 to 90 ° C, and the cool storage material container (40) Even if the internal pressure rises due to thermal expansion of the remaining air, the strength is designed so as not to break.
蓄冷材容器(40)は、容器本体部(42)における内容積減少部(45)よりも前方の部分で、かつ前側の冷媒流通管(13)に接している部分が、全高にわたって冷媒流通管(13)にろう付されている。 The cool storage material container (40) is a part of the container main body part (42) that is in front of the inner volume reduction part (45) and that is in contact with the refrigerant circulation pipe (13) on the front side over the entire height. (13) is brazed.
蓄冷材容器(40)内へ充填される蓄冷材としては、凝固点が５〜１０℃程度に調整されたパラフィン系潜熱蓄冷材が用いられる。具体的には、ペンタデカン、テトラデカンなどが用いられる。蓄冷材は、蓄冷材容器(40)の上端近傍まで存在するように蓄冷材容器(40)内に封入されている。 As the cold storage material filled in the cold storage material container (40), a paraffin-based latent heat cold storage material having a freezing point adjusted to about 5 to 10 ° C is used. Specifically, pentadecane, tetradecane, or the like is used. The cool storage material is enclosed in the cool storage material container (40) so as to exist up to the vicinity of the upper end of the cool storage material container (40).
蓄冷材容器(40)は、両面にろう材層を有するアルミニウムブレージングシートにプレス加工が施されることにより形成され、かつ周縁部どうしが互いにろう付された２枚の略縦長方形状アルミニウム板周縁部どうしが互いにろう付された２枚の略縦長方形状アルミニウム板(46)(47)よりなる。蓄冷材容器(40)を構成する右側のアルミニウム板(46)における容器本体部(42)を形成する部分は平坦であり、同じく外方張り出し部(43)を形成する部分、すなわち前側部分には、右方に膨出した膨出部(48)が、上下方向の全長にわたって設けられている。 The cool storage material container (40) is formed by pressing aluminum brazing sheets having a brazing filler metal layer on both sides, and the peripheral edges of two substantially vertical rectangular aluminum plates whose peripheral portions are brazed to each other. It consists of two substantially vertical rectangular aluminum plates (46) and (47) whose parts are brazed together. The portion of the right aluminum plate (46) that forms the cold storage container (40) that forms the container body (42) is flat, and the portion that also forms the outwardly projecting portion (43), that is, the front portion, A bulging portion (48) bulging to the right is provided over the entire length in the vertical direction.
蓄冷材容器(40)を構成する左側のアルミニウム板(47)における容器本体部(42)を形成する部分、すなわち前側部分を除いた大部分には、左方に膨出した第１膨出部(49)が設けられ、同じく外方張り出し部(43)を形成する部分、すなわち前側部分には、第１膨出部(49)の前側に連なるとともに右方に膨出し、かつ第１膨出部(49)と膨出高さの等しい第２膨出部(51)が、上下方向の全長にわたって設けられている。左側アルミニウム板(47)の第１膨出部(49)の膨出頂壁(49a)は、内方に凹まされており、これにより膨出頂壁(49a)に凹陥部(52)が設けられている。 A portion of the left aluminum plate (47) constituting the cold storage material container (40) forming the container main body portion (42), that is, most of the portion excluding the front side portion, is swelled to the left. (49) is provided, and the portion that also forms the outwardly projecting portion (43), that is, the front side portion, is connected to the front side of the first bulging portion (49) and bulges to the right, and the first bulging portion A second bulging portion (51) having the same bulging height as the portion (49) is provided over the entire length in the vertical direction. The bulging top wall (49a) of the first bulging portion (49) of the left aluminum plate (47) is recessed inward, thereby providing a recessed portion (52) on the bulging top wall (49a). It has been.
そして、２枚のアルミニウム板(46)(47)を、インナーフィン(44)を間に挟んで左側アルミニウム板(47)の開口を右側アルミニウム板(46)の平坦な部分で塞ぐとともに、両アルミニウム板(46)(47)の膨出部(48)(51)の開口どうしが対向するように組み合わせ、この状態でろう付することによって蓄冷材容器(40)が形成されている。ここで、右側アルミニウム板(46)の平坦部と左側アルミニウム板(47)の第１膨出部(49)により容器本体部(42)が形成され、右側アルミニウム板(46)の膨出部(48)と左側アルミニウム板(47)の第２膨出部(51)により外方張り出し部(43)が形成されており、左側アルミニウム板(47)の凹陥部(52)により内容積減少部(45)が形成されている。なお、内容積減少部(45)は、両アルミニウム板(46)(47)をろう付した後に、左側アルミニウム板(47)の第１膨出部(49)の膨出頂壁(49a)を内方に凹ませて凹陥部(28)を設けることにより形成してもよい。 Then, the two aluminum plates (46), (47) are sandwiched between the inner fins (44) and the opening of the left side aluminum plate (47) is closed with the flat portion of the right side aluminum plate (46). The cold storage container (40) is formed by combining the bulging portions (48) and (51) of the plates (46) and (47) so that the openings face each other and brazing in this state. Here, the container main body portion (42) is formed by the flat portion of the right aluminum plate (46) and the first bulge portion (49) of the left aluminum plate (47), and the bulge portion of the right aluminum plate (46) ( 48) and the second bulge portion (51) of the left aluminum plate (47) form an outwardly projecting portion (43), and the concave portion (52) of the left aluminum plate (47) reduces the internal volume ( 45) is formed. The inner volume reducing portion (45) is formed by attaching the bulging top wall (49a) of the first bulging portion (49) of the left aluminum plate (47) after brazing both the aluminum plates (46, 47). It may be formed by recessing inwardly and providing a recess (28).
熱交換コア部(4)において、前後方向に並んだ２つの冷媒流通管(13)からなる各組(14)および各組(14)の２つの冷媒流通管(13)に跨って配置された蓄冷材容器(40)によって、複数の組み合わせ体(41)が構成されている。当該組み合わせ体(41)は左右方向に間隔をおいて配置されており、隣り合う組み合わせ体(41)どうしの間が通風間隙(15)となるとともに、当該通風間隙(15)にアルミニウム製アウターフィン(17)が配置されて冷媒流通管(13)および蓄冷材容器(40)にろう付されている。各組(14)の冷媒流通管(13)および蓄冷材容器(40)からなる組み合わせ体(41)の右側に位置するアウターフィン(17)のフィン本体部(31)は各組(14)の前後の冷媒流通管(13)にろう付され、同じく外方張り出し部(32)は蓄冷材容器(40)の外方張り出し部(43)にろう付されている。また、各組(14)の冷媒流通管(13)および蓄冷材容器(40)からなる組み合わせ体(41)の左側に位置するアウターフィン(17)のフィン本体部(31)は蓄冷材容器(40)の容器本体部(42)にろう付され、同じく外方張り出し部(32)は蓄冷材容器(40)の外方張り出し部(43)にろう付されている。 In the heat exchange core part (4), each pair (14) composed of two refrigerant flow pipes (13) arranged in the front-rear direction and the two refrigerant flow pipes (13) of each set (14) are arranged straddling. The cool storage material container (40) constitutes a plurality of combinations (41). The combination body (41) is arranged in the left-right direction with an interval between adjacent combination bodies (41) serving as a ventilation gap (15), and an aluminum outer fin in the ventilation gap (15). (17) is arranged and brazed to the refrigerant flow pipe (13) and the cool storage material container (40). The fin body portion (31) of the outer fin (17) located on the right side of the combination body (41) comprising the refrigerant flow pipe (13) and the cold storage container (40) of each pair (14) The outer projecting portion (32) is brazed to the outer projecting portion (43) of the cold storage material container (40). Further, the fin body portion (31) of the outer fin (17) located on the left side of the combination body (41) composed of the refrigerant flow pipe (13) and the cold storage material container (40) of each set (14) is a cold storage material container ( 40) is brazed to the container body (42), and the outwardly projecting part (32) is also brazed to the outwardly projecting part (43) of the cold storage material container (40).
上記２つの実施形態においては、各蓄冷材容器(16)(40)が、１つの密閉された内部空間(16a)(40a)を有する蓄冷材封入部となっているが、これに限定されるものではない。すなわち、全蓄冷材容器(16)(40)のうち、少なくとも一部の複数の蓄冷材容器(16)(40)の内部空間(16a)(40a)どうしが、適当な連通部を介して通じさせられ、連通部および連通部により通じさせられた複数の蓄冷材容器(16)(40)が、１つの密閉された空間を有する蓄冷材封入部となっていてもよい。 In the above two embodiments, each cold storage material container (16) (40) is a cool storage material enclosure having one sealed internal space (16a) (40a), but is not limited thereto. It is not a thing. That is, the internal spaces (16a) and (40a) of at least some of the plurality of cool storage material containers (16) and (40) communicate with each other through appropriate communication portions. The plurality of regenerator containers (16) and (40) communicated by the communication part and the communication part may be a regenerator enclosing part having one sealed space.
この発明による蓄冷機能付きエバポレータは、停車時に圧縮機の駆動源であるエンジンを一時的に停止させる車両のカーエアコンを構成する冷凍サイクルに好適に用いられる。 The evaporator with a cold storage function according to the present invention is suitably used in a refrigeration cycle constituting a car air conditioner for a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.
(1)：蓄冷機能付きエバポレータ
(13)：冷媒流通管
(15)：間隙
(16)(40)：蓄冷材容器（蓄冷材封入部）
(16a)(40a)：内部空間
(23)(45)：内容積減少部
(17)：アウターフィン
(41)：組み合わせ体
(1): Evaporator with cool storage function
(13): Refrigerant distribution pipe
(15): Gap
(16) (40): Cold storage material container (cool storage material enclosure)
(16a) (40a): Interior space
(23) (45): Internal volume decreasing part
(17): Outer fin
(41): Combination
Claims (4)
蓄冷材容器の下側でかつ通風方向に隣り合う２つの冷媒流通管間の隙間の中間部よりも風上側の部分のみに、蓄冷材容器の左右両側壁を部分的に内方に変形させることにより形成され、かつ蓄冷材容器の内容積を減少させる内容積減少部が設けられており、内容積減少部の左右両側面が風上側冷媒流通管から離隔している蓄冷機能付きエバポレータ。 A plurality of pipe sets composed of two flat refrigerant flow pipes extending in the vertical direction and having the width direction facing the ventilation direction and arranged at intervals in the ventilation direction are arranged in parallel at intervals in the left-right direction. A gap is formed between adjacent tube sets, a flat regenerator container in which the regenerator material is sealed is disposed in some of the entire gaps, and outer fins are disposed in the remaining gaps. The cool storage material container has a flat shape extending in the vertical direction and the width direction facing the ventilation direction, and the cool storage material in the cool storage material container is cooled by the cold heat of the coolant flowing in the coolant circulation pipe. In the evaporator with the cold storage function
The left and right side walls of the cool storage material container are partially deformed inwardly only in the portion on the windward side of the intermediate portion of the gap between the two refrigerant flow pipes adjacent to each other below the cool storage material container in the ventilation direction. The evaporator with a cool storage function is provided, and is provided with an internal volume reduction portion that reduces the internal volume of the cold storage material container , and the left and right side surfaces of the internal volume reduction portion are separated from the windward refrigerant circulation pipe .
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010287770A JP5717436B2 (en) | 2010-12-24 | 2010-12-24 | Evaporator with cool storage function |
| US13/214,298 US20120042687A1 (en) | 2010-08-23 | 2011-08-22 | Evaporator with cool storage function |
| CN2011203085319U CN202274681U (en) | 2010-08-23 | 2011-08-23 | Evaporator with cool storage function |
| CN201110242709.9A CN102374705B (en) | 2010-08-23 | 2011-08-23 | Evaporator with cool storage function |
| DE102011081379A DE102011081379A1 (en) | 2010-08-23 | 2011-08-23 | Evaporator with cold storage function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010287770A JP5717436B2 (en) | 2010-12-24 | 2010-12-24 | Evaporator with cool storage function |
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| Publication Number | Publication Date |
|---|---|
| JP2012137199A JP2012137199A (en) | 2012-07-19 |
| JP5717436B2 true JP5717436B2 (en) | 2015-05-13 |
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| JP2010287770A Expired - Fee Related JP5717436B2 (en) | 2010-08-23 | 2010-12-24 | Evaporator with cool storage function |
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| JP5920087B2 (en) * | 2012-07-23 | 2016-05-18 | 株式会社デンソー | Cold storage heat exchanger |
| JP5772748B2 (en) * | 2012-07-23 | 2015-09-02 | 株式会社デンソー | Evaporator |
| JP5862507B2 (en) * | 2012-08-07 | 2016-02-16 | 株式会社デンソー | Cold storage heat exchanger |
| JP6186253B2 (en) | 2012-12-17 | 2017-08-23 | 株式会社ケーヒン・サーマル・テクノロジー | Evaporator with cool storage function |
| JP6182442B2 (en) * | 2013-12-05 | 2017-08-16 | 株式会社ケーヒン・サーマル・テクノロジー | Evaporator with cool storage function |
| JP6128188B2 (en) * | 2015-11-09 | 2017-05-17 | 株式会社デンソー | Cold storage heat exchanger |
| JP6607788B2 (en) * | 2016-01-13 | 2019-11-20 | 株式会社ケーヒン・サーマル・テクノロジー | Evaporator with cool storage function |
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| JP3334386B2 (en) * | 1994-12-21 | 2002-10-15 | 株式会社デンソー | Cool storage type cooling device |
| JP5525726B2 (en) * | 2008-12-26 | 2014-06-18 | 株式会社ケーヒン・サーマル・テクノロジー | Evaporator with cool storage function |
| JP5315094B2 (en) * | 2009-03-06 | 2013-10-16 | 株式会社ケーヒン・サーマル・テクノロジー | Evaporator with cool storage function |
| JP5194241B2 (en) * | 2009-03-31 | 2013-05-08 | 株式会社ケーヒン・サーマル・テクノロジー | Evaporator with cool storage function |
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