JP2013135177A - Cooling structure of electrical box - Google Patents

Cooling structure of electrical box Download PDF

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JP2013135177A
JP2013135177A JP2011286381A JP2011286381A JP2013135177A JP 2013135177 A JP2013135177 A JP 2013135177A JP 2011286381 A JP2011286381 A JP 2011286381A JP 2011286381 A JP2011286381 A JP 2011286381A JP 2013135177 A JP2013135177 A JP 2013135177A
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cooling plate
refrigerant
cooling
electrical box
cooling structure
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Yoshinari Nagatomi
吉成 永富
Kenichiro Yano
謙一郎 矢野
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a cooling structure of an electrical box which efficiently cools a heating element.SOLUTION: A cooling structure of an electrical box 18 includes: a cooling plate 19 which is provided at the outer side of an electric box 18 housing a power element 50, is thermally connected with the power element 50, and cools the power element 50; and a coolant pipe 24 supplying a coolant from a coolant circuit 3 where the coolant circulates to the cooling plate 19. In the cooling structure of the electrical box, the cooling plate 19 includes inclination surface parts 19C, 19C which incline from a substantially center part to both side edge parts. Straight pipe parts 24A, 24A of the coolant pipe 24 are respectively disposed at the inclination surface parts 19C, 19C. The power element 50 is disposed in a region 55 corresponding to a space between the straight pipe parts 24A, 24A.

Description

本発明は、発熱体を収納した電装箱の冷却構造に関する。   The present invention relates to a cooling structure for an electrical box containing a heating element.

一般に、発熱体を収納した電装箱の外側に設けられ、前記発熱体と熱的に接続されて当該発熱体を冷却する冷却板と、冷媒が循環する冷媒回路から前記冷却板に冷媒を供給する冷媒配管とを備えた電装箱の冷却構造が知られている（例えば、特許文献１参照）。
この種の冷却構造では、空冷のヒートシンクを備えたものと比べて、電装箱の設置場所の制限が少ないことに加え、冷却板のサイズダウンを実現できるという利点がある。 In general, a cooling plate is provided outside an electrical box containing a heating element and is thermally connected to the heating element to cool the heating element, and a refrigerant is supplied to the cooling plate from a refrigerant circuit in which the refrigerant circulates. A cooling structure for an electrical box having a refrigerant pipe is known (for example, see Patent Document 1).
This type of cooling structure has the advantage that the size of the cooling plate can be reduced, in addition to less restrictions on the installation location of the electrical equipment box, compared to a structure equipped with an air-cooled heat sink.

特開平０５−１８７７２４号公報Japanese Patent Laid-Open No. 05-187724

ところで、発熱体の発熱量は増加する傾向にあるため、より効率良く発熱体を冷却することが要望されている。
本発明は、上述した事情に鑑みてなされたものであり、発熱体を効率良く冷却することができる電装箱の冷却構造を提供することを目的とする。 By the way, since the emitted-heat amount of a heat generating body tends to increase, cooling a heat generating body more efficiently is desired.
This invention is made | formed in view of the situation mentioned above, and it aims at providing the cooling structure of the electrical equipment box which can cool a heat generating body efficiently.

上記目的を達成するために、本発明は、発熱体を収納した電装箱の外側に設けられ、前記発熱体と熱的に接続されて当該発熱体を冷却する冷却板と、冷媒が循環する冷媒回路から前記冷却板に冷媒を供給する冷媒配管とを備えた電装箱の冷却構造において、前記冷却板は、略中央部から両側縁部に向けて傾斜する傾斜面を備え、これら傾斜面に前記冷媒配管をそれぞれ配置し、これら冷媒配管の間に対応する領域に前記発熱体を配置したことを特徴とする。   In order to achieve the above object, the present invention provides a cooling plate that is provided outside an electrical box containing a heating element, is thermally connected to the heating element and cools the heating element, and a refrigerant in which the refrigerant circulates. In the cooling structure of the electrical box provided with a refrigerant pipe for supplying a refrigerant from the circuit to the cooling plate, the cooling plate includes inclined surfaces that are inclined from a substantially central portion toward both side edges, and the inclined surfaces are provided with the inclined surfaces. Each of the refrigerant pipes is arranged, and the heating element is arranged in a corresponding region between the refrigerant pipes.

この構成において、前記冷却板は、前記傾斜面に前記冷媒配管が嵌る溝部を設けても良い。また、前記冷媒配管を前記傾斜面に配置した状態で固定する固定具を備えても良い。また、前記電装箱は、前記冷却板と対向する位置に開口部を備え、この開口部を通じて当該電装箱内に露出する前記冷却板の面に前記発熱体を取り付けても良い。
更に、上述した固定具の代わりに断面形状が略丸形の冷媒配管を一部潰して、その断面形状を少し扁平形状として、その冷媒配管を冷却板の傾斜面に形成した溝部（凹部）に嵌合させて、固定具を用いずに冷媒配管を冷却板に固定するようにしても良い。
また、発熱体と冷却板との間には、熱伝導性を良好とするパテや塗装を施し、発熱体からの放熱を冷却板へ確実に伝えるようにしても良い。 In this configuration, the cooling plate may be provided with a groove portion into which the refrigerant pipe fits on the inclined surface. Moreover, you may provide the fixing tool which fixes the said refrigerant | coolant piping in the state arrange | positioned on the said inclined surface. The electrical box may include an opening at a position facing the cooling plate, and the heating element may be attached to the surface of the cooling plate exposed through the opening to the electrical box.
Further, instead of the fixture described above, a refrigerant pipe having a substantially round cross-sectional shape is partially crushed, the cross-sectional shape is made slightly flat, and the groove (recess) formed on the inclined surface of the cooling plate has the refrigerant pipe. The refrigerant pipe may be fixed to the cooling plate without using a fixture.
In addition, a putty or a coating with good thermal conductivity may be provided between the heating element and the cooling plate so that the heat radiation from the heating element is reliably transmitted to the cooling plate.

本発明によれば、前記冷却板は、略中央部から両側縁部に向けて傾斜する傾斜面を備え、これら傾斜面に前記冷媒配管をそれぞれ配置し、これら冷媒配管の間に対応する領域に前記発熱体を配置したため、発熱体の配置領域における冷却板が肉厚に形成されて熱容量を高めることができる。さらに、発熱体の配置領域を挟むように冷媒配管が配置され、各冷媒配管に冷媒が流通されることにより、当該領域に配置される発熱体からの発熱を効率良く冷却することができ、ひいては、冷却板の小型化を図ることができる。   According to the present invention, the cooling plate includes inclined surfaces that are inclined from the substantially central portion toward both side edge portions, the refrigerant pipes are arranged on the inclined surfaces, respectively, and the corresponding regions between the refrigerant pipes are provided. Since the heating element is arranged, the cooling plate in the arrangement area of the heating element is formed thick so that the heat capacity can be increased. Further, the refrigerant pipes are arranged so as to sandwich the heating element arrangement region, and the refrigerant flows through each refrigerant pipe, whereby the heat generated from the heating element arranged in the region can be efficiently cooled, and thus The cooling plate can be downsized.

本発明の一実施形態にかかる電装箱の冷却構造を備えた空気調和装置の冷媒回路図である。It is a refrigerant circuit diagram of the air conditioning apparatus provided with the cooling structure of the electrical equipment box concerning one Embodiment of this invention. 電装箱の冷却構造を示す外観斜視図である。It is an external appearance perspective view which shows the cooling structure of an electrical equipment box. 冷却構造の分解側断面図である。It is a decomposition side sectional view of a cooling structure. 冷却板に配置されたパワー素子と冷媒配管との配置関係を示す平面図である。It is a top view which shows the arrangement | positioning relationship between the power element arrange | positioned at the cooling plate, and refrigerant | coolant piping.

以下、図面を参照して本発明の実施形態について説明する。
図１は、本実施形態にかかる電装箱の冷却構造を備えた空気調和装置の冷媒回路図である。空気調和装置１００は、図１に示すように、被調和室の外に設置される室外ユニット１と、被調和室内に設置される室内ユニット２とを備えた分離型のヒートポンプ式空気調和装置である。空気調和装置１００は、室外ユニット１と室内ユニット２とを接続する閉回路状に接続された冷媒回路３を備え、この冷媒回路３に冷媒を循環することにより、被調和室を空調（冷房及び暖房）する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a refrigerant circuit diagram of an air conditioner including a cooling structure for an electrical box according to the present embodiment. As shown in FIG. 1, the air conditioner 100 is a separate heat pump type air conditioner that includes an outdoor unit 1 installed outside a room to be conditioned and an indoor unit 2 installed inside a room to be conditioned. is there. The air conditioner 100 includes a refrigerant circuit 3 connected in a closed circuit shape that connects the outdoor unit 1 and the indoor unit 2, and circulates the refrigerant in the refrigerant circuit 3, thereby air-conditioning (cooling and cooling) the conditioned room. Heat).

室外ユニット１は、圧縮機１１と、この圧縮機１１の吸込側に接続されたアキュムレータ１２と、圧縮機１１の吐出側に順次接続されたオイルセパレータ１３、四方弁１４、室外熱交換器１５、及び、レシーバタンク１６とを備える。また、室外ユニット１には、室外熱交換器１５へ向かって送風する室外ファン１７と、空気調和装置１００全体の動作を制御する制御基板（不図示）が収容された電装箱１８とが配設される。この電装箱１８には、制御基板に配置される発熱体としてのパワー素子５０（図３）と熱的に接続された冷却板１９が取り付けられている。
室内ユニット２は、レシーバタンク１６に接続される電動膨張弁２１と、この電動膨張弁２１と四方弁１４との間に接続される室内熱交換器２２と、この室内熱交換器２２へ向かって送風する室内ファン２３とを備える。 The outdoor unit 1 includes a compressor 11, an accumulator 12 connected to the suction side of the compressor 11, an oil separator 13, a four-way valve 14, an outdoor heat exchanger 15 sequentially connected to the discharge side of the compressor 11, And a receiver tank 16. The outdoor unit 1 includes an outdoor fan 17 that blows air toward the outdoor heat exchanger 15 and an electrical box 18 that houses a control board (not shown) that controls the operation of the entire air conditioner 100. Is done. A cooling plate 19 that is thermally connected to a power element 50 (FIG. 3) as a heating element disposed on the control board is attached to the electrical box 18.
The indoor unit 2 has an electric expansion valve 21 connected to the receiver tank 16, an indoor heat exchanger 22 connected between the electric expansion valve 21 and the four-way valve 14, and toward the indoor heat exchanger 22. And an indoor fan 23 for blowing air.

空気調和装置１００では、四方弁１４を切り換えることにより冷媒回路３を流れる冷媒の流れを切り換えて冷房運転と暖房運転とを切り換えるよう構成されている。冷房運転時には図中に示す実線矢印の方向に冷媒が流れ、暖房運転時には破線矢印の方向に冷媒が流れる。
すなわち、冷房運転時には、四方弁１４が実線の位置に切り替えられ、圧縮機１１から吐出された高圧の冷媒がオイルセパレータ１３、四方弁１４を経て室外熱交換器１５に達し、室外熱交換器１５において凝縮される。この室外熱交換器１５で凝縮された液冷媒は、レシーバタンク１６を経て電動膨張弁２１に送られ、この電動膨張弁２１を通過して膨張した後、室内熱交換器２２において蒸発される。この室内熱交換器２２で気化されたガス冷媒は、四方弁１４及びアキュムレータ１２を経た後に圧縮機１１の吸込側に戻る。
一方、暖房運転時には、四方弁１４が破線の位置に切り替えられ、圧縮機１１から吐出された高圧の冷媒がオイルセパレータ１３、四方弁１４を経て室内熱交換器２２に送られ、この室内熱交換器２２において凝縮される。この室内熱交換器２２で凝縮された液冷媒は、電動膨張弁２１に送られ、この電動膨張弁２１を通過して膨張した後、レシーバタンク１６を経て室外熱交換器１５において蒸発される。この室外熱交換器１５で気化されたガス冷媒は、四方弁１４及びアキュムレータ１２を経た後に圧縮機１１の吸込側に戻る。 The air conditioner 100 is configured to switch between the cooling operation and the heating operation by switching the flow of the refrigerant flowing through the refrigerant circuit 3 by switching the four-way valve 14. During the cooling operation, the refrigerant flows in the direction of the solid line arrow shown in the figure, and during the heating operation, the refrigerant flows in the direction of the broken line arrow.
That is, during the cooling operation, the four-way valve 14 is switched to the solid line position, and the high-pressure refrigerant discharged from the compressor 11 reaches the outdoor heat exchanger 15 via the oil separator 13 and the four-way valve 14, and the outdoor heat exchanger 15. Condensed in The liquid refrigerant condensed in the outdoor heat exchanger 15 is sent to the electric expansion valve 21 through the receiver tank 16, expands through the electric expansion valve 21, and is evaporated in the indoor heat exchanger 22. The gas refrigerant evaporated in the indoor heat exchanger 22 returns to the suction side of the compressor 11 after passing through the four-way valve 14 and the accumulator 12.
On the other hand, during the heating operation, the four-way valve 14 is switched to the position indicated by the broken line, and the high-pressure refrigerant discharged from the compressor 11 is sent to the indoor heat exchanger 22 through the oil separator 13 and the four-way valve 14, and this indoor heat exchange is performed. It is condensed in the vessel 22. The liquid refrigerant condensed in the indoor heat exchanger 22 is sent to the electric expansion valve 21, passes through the electric expansion valve 21, expands, and then evaporates in the outdoor heat exchanger 15 through the receiver tank 16. The gas refrigerant evaporated in the outdoor heat exchanger 15 returns to the suction side of the compressor 11 after passing through the four-way valve 14 and the accumulator 12.

上述のように、室外熱交換器１５と室内熱交換器２２とを接続する冷媒配管２４には、室外熱交換器１５または室内熱交換器２２で凝縮された液冷媒が流れる。この液冷媒は５０〜６０℃程度に冷却されており、室外熱交換器１５とレシーバタンク１６との間の冷媒配管２４には上記パワー素子５０を冷却するための冷却板１９が接合されている。   As described above, the liquid refrigerant condensed in the outdoor heat exchanger 15 or the indoor heat exchanger 22 flows through the refrigerant pipe 24 that connects the outdoor heat exchanger 15 and the indoor heat exchanger 22. The liquid refrigerant is cooled to about 50 to 60 ° C., and a cooling plate 19 for cooling the power element 50 is joined to the refrigerant pipe 24 between the outdoor heat exchanger 15 and the receiver tank 16. .

次に、電装箱の冷却構造について説明する。
図２は、電装箱の冷却構造を示す外観斜視図であり、図３は、冷却構造の分解側断面図である。
電装箱１８は、図２に示すように、底板３０の正面を除いた周縁から上方に延びる側板３１，３２及び背板３３と、これら側板３１，３２及び背板３３の上縁部に配置される天板３４とを備え、正面側が開口して構成されている。
背板３３には、図３に示すように、背板３３を貫通する開口部３３Ａが形成され、この開口部３３Ａに対向する背板３３の外面には、冷却板１９がねじ４０によって固定されている。背板３３と冷却板１９との間には、防水シール（不図示）が介在されており、電装箱１８に雨水がかかった場合であっても、この雨水が開口部３３Ａを通じて電装箱１８内に侵入することを防止している。 Next, the cooling structure of the electrical box will be described.
FIG. 2 is an external perspective view showing a cooling structure of the electrical box, and FIG. 3 is an exploded side sectional view of the cooling structure.
As shown in FIG. 2, the electrical box 18 is disposed on the side plates 31 and 32 and the back plate 33 extending upward from the peripheral edge except the front surface of the bottom plate 30, and on the upper edges of the side plates 31 and 32 and the back plate 33. The top plate 34 is provided, and the front side is open.
As shown in FIG. 3, the back plate 33 is formed with an opening 33A penetrating the back plate 33, and the cooling plate 19 is fixed to the outer surface of the back plate 33 facing the opening 33A by screws 40. ing. A waterproof seal (not shown) is interposed between the back plate 33 and the cooling plate 19, and even when rainwater is splashed on the electrical equipment box 18, the rainwater can enter the electrical equipment box 18 through the opening 33 </ b> A. To prevent intrusion.

冷却板１９は、平面視で外郭が水平方向に長い略長方形状に形成され、例えば、アルミニウム等の熱伝導性の高い材質で形成された厚みのある板材である。上記開口部３３Ａに対向する冷却板１９の面１９Ａには、圧縮機１１や室外ファン１７を動作させるインテリジェントパワーモジュール(Intelligent Power Module)５１，５１及び、各インテリジェントパワーモジュール５１，５１への電流を整流するダイオード５２等のパワー素子５０が、ねじ４１によって、直接固定されている。これらパワー素子５０は、開口部３３Ａを通じて、電装箱１８内に露出し、当該電装箱１８内に収容される制御基板に接続される。
この構成によれば、熱伝導性の高い金属で形成された冷却板１９にパワー素子５０が直接固定されるため、これら冷却板１９とパワー素子５０との間の熱抵抗を抑えることができ、冷却板１９での冷却効率を向上させることができる。 The cooling plate 19 is a thick plate member that is formed in a substantially rectangular shape whose outer shape is long in the horizontal direction in plan view, and is made of a material having high thermal conductivity such as aluminum. On the surface 19A of the cooling plate 19 facing the opening 33A, currents to the intelligent power modules 51 and 51 for operating the compressor 11 and the outdoor fan 17 and the intelligent power modules 51 and 51 are supplied. A power element 50 such as a diode 52 to be rectified is directly fixed by a screw 41. These power elements 50 are exposed in the electrical box 18 through the opening 33 </ b> A and connected to a control board accommodated in the electrical box 18.
According to this configuration, since the power element 50 is directly fixed to the cooling plate 19 formed of a metal having high thermal conductivity, the thermal resistance between the cooling plate 19 and the power element 50 can be suppressed, The cooling efficiency at the cooling plate 19 can be improved.

外部に露出する冷却板１９の外側の面は、図３に示すように、断面視で略中央部が突出した山型に形成されており、略中央部に水平方向に延びる平面部１９Ｂと、この平面部１９Ｂから上方及び下方の側縁部に向かってそれぞれ傾斜する傾斜面部１９Ｃ，１９Ｃとを備える。
これら傾斜面部１９Ｃ，１９Ｃには、それぞれ長手方向に延びる一対の溝部４２，４２が設けられている。各溝部４２，４２は断面が半円弧状であり、これら溝部４２，４２には冷媒配管２４が嵌めこまれる。
本実施形態では、冷媒配管２４は、略平行に延びる一対の直管部２４Ａ，２４Ａと、これら直管部２４Ａ，２４Ａの一端同士を接続する略Ｕ字形状の曲管部２４Ｂとを備え、当該直管部２４Ａ，２４Ａが各溝部４２，４２に嵌めこまれる。 As shown in FIG. 3, the outer surface of the cooling plate 19 exposed to the outside is formed in a mountain shape with a substantially central portion protruding in a cross-sectional view, and a flat surface portion 19 </ b> B extending in the horizontal direction at the substantially central portion Inclined surface portions 19C and 19C that are inclined from the flat surface portion 19B toward the upper and lower side edge portions, respectively.
The inclined surface portions 19C and 19C are provided with a pair of groove portions 42 and 42 extending in the longitudinal direction, respectively. Each of the grooves 42 and 42 has a semicircular cross section, and the refrigerant pipe 24 is fitted into the grooves 42 and 42.
In the present embodiment, the refrigerant pipe 24 includes a pair of straight pipe portions 24A and 24A that extend substantially in parallel, and a substantially U-shaped bent pipe portion 24B that connects one ends of the straight pipe portions 24A and 24A. The straight pipe portions 24A and 24A are fitted into the groove portions 42 and 42, respectively.

ところで、近年、パワー素子５０の発熱量は増加する傾向にあり、冷媒を用いて冷却する構成であっても、より効率良く冷却するレイアウトが要望されている。
このため、本実施形態では、上述したように、冷却板１９が略中央部から両側縁部に向けて傾斜する傾斜面部１９Ｃ，１９Ｃを備え、これら傾斜面部１９Ｃ，１９Ｃに冷媒配管２４の直管部２４Ａ，２４Ａをそれぞれ配置している。さらに、インテリジェントパワーモジュール５１，５１及びダイオード５２等のパワー素子５０は、図４に示すように、開口部３３Ａに対向する冷却板１９の面１９Ａにおける冷媒配管２４の直管部２４Ａ，２４Ａ間に対応する領域５５に配置されている。 By the way, in recent years, the amount of heat generated by the power element 50 tends to increase, and there is a demand for a layout that allows more efficient cooling even when the cooling is performed using a refrigerant.
Therefore, in this embodiment, as described above, the cooling plate 19 includes the inclined surface portions 19C and 19C that are inclined from the substantially central portion toward both side edge portions, and the straight pipes of the refrigerant pipes 24 are provided on these inclined surface portions 19C and 19C. The parts 24A and 24A are respectively arranged. Further, as shown in FIG. 4, the power elements 50 such as the intelligent power modules 51 and 51 and the diode 52 are disposed between the straight pipe portions 24A and 24A of the refrigerant pipe 24 on the surface 19A of the cooling plate 19 facing the opening 33A. It is arranged in the corresponding area 55.

上述のように、冷却板１９が略中央部から両側縁部に向けて傾斜する傾斜面部１９Ｃ，１９Ｃを備えるため、パワー素子５０が配置される領域５５における冷却板１９の厚みは、傾斜面部１９Ｃ，１９Ｃの側縁部に比べて肉厚となっており、当該領域５５における冷却板１９の熱容量を高めることができる。
さらに、パワー素子５０が配置される領域５５を挟むように冷媒配管２４の直管部２４Ａ，２４が配置され、各直管部２４Ａ，２４に冷媒が流通されることにより、当該領域５５に配置されるパワー素子５０が発する熱を効率良く冷却することができる。
従って、冷却板１９の小型化を図ることができ、電装箱１８における冷却板１９の配置構成の自由度が高まる。
また、本構成では、パワー素子５０が配置される領域５５における冷却板１９が肉厚に形成されることにより、図３に示すように、パワー素子５０（インテリジェントパワーモジュール５１，５１及びダイオード５２）を固定するためのねじ穴４４の深さを、冷却板１９が肉厚以下に抑えることができる。このため、このねじ穴４４が冷却板１９を貫通することを防止することができ、防水のための構成を付加する必要がなく、冷却板１９の構成の簡素化を図ることができる。 As described above, since the cooling plate 19 includes the inclined surface portions 19C and 19C that are inclined from the substantially central portion toward both side edge portions, the thickness of the cooling plate 19 in the region 55 where the power element 50 is disposed is the inclined surface portion 19C. , 19C is thicker than the side edge portion, and the heat capacity of the cooling plate 19 in the region 55 can be increased.
Further, the straight pipe portions 24A, 24 of the refrigerant pipe 24 are arranged so as to sandwich the area 55 where the power element 50 is arranged, and the refrigerant is circulated through the straight pipe parts 24A, 24, thereby being arranged in the area 55. Heat generated by the power element 50 can be efficiently cooled.
Therefore, the cooling plate 19 can be reduced in size, and the degree of freedom of the arrangement configuration of the cooling plate 19 in the electrical box 18 is increased.
Further, in this configuration, the cooling plate 19 in the region 55 where the power element 50 is disposed is formed thick, so that the power element 50 (intelligent power modules 51 and 51 and the diode 52) is formed as shown in FIG. The depth of the screw hole 44 for fixing the cooling plate 19 can be suppressed to the thickness of the cooling plate 19 or less. For this reason, it is possible to prevent the screw hole 44 from penetrating the cooling plate 19, and it is not necessary to add a waterproof structure, and the configuration of the cooling plate 19 can be simplified.

ところで、本実施形態では、冷却板１９を単一の板材で形成しているため、冷却板１９の一方の面１９Ａにパワー素子５０が取り付けられ、他方の面に冷媒配管２４が取り付けられる構成となっている。この構成では、例えば、メンテナンス等で電装箱１８を取り外す際に、冷媒配管２４が邪魔となることが想定されるため、この冷媒配管２４を冷却板１９から簡単に着脱できる構成とすることが望ましい。
本実施形態では、冷却板１９は傾斜面部１９Ｃ，１９Ｃを備え、これら傾斜面部１９Ｃ，１９Ｃの溝部４２，４２に冷媒配管２４の直管部２４Ａ，２４Ａを配置するとともに、これら直管部２４Ａ，２４Ａの一端側を曲管部２４Ｂで連結した構成となっている。
この構成によれば、曲管部２４Ｂで連結された直管部２４Ａ，２４Ａが、傾斜面部１９Ｃ，１９Ｃの溝部４２，４２を挟持することにより、簡単な構成で冷媒配管２４を冷却板１９に固定することができる。また、冷媒配管２４を取り外す際には、曲管部２４Ｂとは反対側の直管部２４Ａ，２４Ａの部位を、お互いに離間するように湾曲させることにより、簡単に溝部４２，４２から離脱させることができる。
さらに、本実施形態では、冷媒配管２４の直管部２４Ａ，２４Ａが各溝部４２，４２に嵌めこまれた状態で、当該冷媒配管２４を冷却板１９に固定するための固定部材（固定具）４３が設けられている。この固定部材４３は、冷却板１９の形状に合わせて、側面視で略中央部が突出した山型に形成されており、溝部４２，４２に対向する位置に半円弧状に屈曲部４３Ａ，４３Ａと、両端部に背板３３にねじ止めするための固定部４３Ｂ，４３Ｂとを備える。この構成によれば、輸送時の振動等で、冷媒配管２４が冷却板１９から離脱する事態を回避することができ、パワー素子５０を確実に冷却することが可能となる。 By the way, in this embodiment, since the cooling plate 19 is formed of a single plate material, the power element 50 is attached to one surface 19A of the cooling plate 19, and the refrigerant pipe 24 is attached to the other surface. It has become. In this configuration, for example, when the electrical equipment box 18 is removed for maintenance or the like, it is assumed that the refrigerant pipe 24 becomes an obstacle. Therefore, it is desirable that the refrigerant pipe 24 be easily detachable from the cooling plate 19. .
In the present embodiment, the cooling plate 19 includes inclined surface portions 19C and 19C. The straight pipe portions 24A and 24A of the refrigerant pipe 24 are disposed in the groove portions 42 and 42 of the inclined surface portions 19C and 19C, and the straight pipe portions 24A and 24A are arranged. The one end side of 24A is connected by a curved pipe portion 24B.
According to this configuration, the straight pipe portions 24A and 24A connected by the curved pipe portion 24B sandwich the groove portions 42 and 42 of the inclined surface portions 19C and 19C, so that the refrigerant pipe 24 can be connected to the cooling plate 19 with a simple configuration. Can be fixed. Further, when the refrigerant pipe 24 is removed, the straight pipe parts 24A and 24A opposite to the curved pipe part 24B are easily separated from the groove parts 42 and 42 by curving them so as to be separated from each other. be able to.
Further, in the present embodiment, a fixing member (fixing tool) for fixing the refrigerant pipe 24 to the cooling plate 19 in a state where the straight pipe parts 24A and 24A of the refrigerant pipe 24 are fitted in the grooves 42 and 42, respectively. 43 is provided. The fixing member 43 is formed in a mountain shape with a substantially central portion protruding in a side view in accordance with the shape of the cooling plate 19, and bent portions 43 </ b> A and 43 </ b> A in a semicircular arc shape at positions facing the groove portions 42 and 42. And fixing portions 43B and 43B for screwing the back plate 33 to both ends. According to this configuration, it is possible to avoid a situation in which the refrigerant pipe 24 is detached from the cooling plate 19 due to vibration during transportation, and the power element 50 can be reliably cooled.

以上説明したように、本実施形態によれば、パワー素子５０を収納した電装箱１８の外側に設けられ、パワー素子５０と熱的に接続されて当該パワー素子５０を冷却する冷却板１９と、冷媒が循環する冷媒回路３から冷却板１９に冷媒を供給する冷媒配管２４とを備えた電装箱１８の冷却構造において、冷却板１９は、略中央部から両側縁部に向けて傾斜する傾斜面部１９Ｃ，１９Ｃを備え、これら傾斜面部１９Ｃ，１９Ｃに冷媒配管２４の直管部２４Ａ，２４Ａをそれぞれ配置し、これら直管部２４Ａ，２４Ａの間に対応する領域５５にパワー素子５０を配置したため、パワー素子５０が配置される領域５５における冷却板１９の厚みは、傾斜面部１９Ｃ，１９Ｃの側縁部に比べて肉厚となっており、当該領域５５における冷却板１９の熱容量を高めることができる。パワー素子５０が配置される領域５５を挟むように冷媒配管２４の直管部２４Ａ，２４が配置され、各直管部２４Ａ，２４に冷媒が流通されることにより、当該領域５５に配置されるパワー素子５０が発する熱を効率良く冷却することができる。
従って、冷却板１９の小型化を図ることができ、電装箱１８における冷却板１９の配置構成の自由度が高まる。 As described above, according to the present embodiment, the cooling plate 19 provided outside the electrical box 18 containing the power element 50 and thermally connected to the power element 50 to cool the power element 50; In the cooling structure of the electrical box 18 provided with the refrigerant pipe 24 for supplying the refrigerant to the cooling plate 19 from the refrigerant circuit 3 in which the refrigerant circulates, the cooling plate 19 is an inclined surface portion that is inclined from the substantially central portion toward both side edge portions. 19C, 19C, the straight pipe portions 24A, 24A of the refrigerant pipe 24 are disposed on the inclined surface portions 19C, 19C, respectively, and the power element 50 is disposed in the corresponding region 55 between the straight pipe portions 24A, 24A. The thickness of the cooling plate 19 in the region 55 where the power element 50 is disposed is thicker than the side edges of the inclined surface portions 19C and 19C. It is possible to increase the amount. The straight pipe portions 24A, 24 of the refrigerant pipe 24 are arranged so as to sandwich the area 55 where the power element 50 is arranged, and the refrigerant is circulated through the straight pipe parts 24A, 24, thereby being arranged in the area 55. The heat generated by the power element 50 can be efficiently cooled.
Therefore, the cooling plate 19 can be reduced in size, and the degree of freedom of the arrangement configuration of the cooling plate 19 in the electrical box 18 is increased.

また、本実施形態によれば、冷却板１９は、傾斜面部１９Ｃ，１９Ｃに冷媒配管２４の直管部２４Ａ，２４が嵌る溝部４２，４２を設けたため、簡単な構成で冷媒配管２４を冷却板１９に固定することができる。
さらに、本実施形態によれば、冷媒配管２４は、直管部２４Ａ，２４の一端側を曲管部２４Ｂで連結しているため、この一体となった直管部２４Ａ，２４が、傾斜面部１９Ｃ，１９Ｃの溝部４２，４２を挟持することにより、簡単な構成で冷媒配管２４を冷却板１９に固定することができる。 Further, according to the present embodiment, the cooling plate 19 is provided with the groove portions 42 and 42 into which the straight pipe portions 24A and 24 of the refrigerant pipe 24 are fitted on the inclined surface portions 19C and 19C. 19 can be fixed.
Further, according to the present embodiment, the refrigerant pipe 24 is connected to the one end side of the straight pipe portions 24A, 24 by the curved pipe portion 24B, so that the integrated straight pipe portions 24A, 24 are inclined surface portions. By sandwiching the groove portions 42 and 42 of 19C and 19C, the refrigerant pipe 24 can be fixed to the cooling plate 19 with a simple configuration.

また、本実施形態によれば、冷媒板１９を傾斜面部１９Ｃ，１９Ｃに配置した状態で冷媒配管２４を固定する固定部材４３を備えるため、輸送時の振動等で、冷媒配管２４が冷却板１９から離脱する事態を回避することができ、パワー素子５０を確実に冷却することが可能となる。   Moreover, according to this embodiment, since the fixing member 43 which fixes the refrigerant | coolant piping 24 in the state which has arrange | positioned the refrigerant | coolant plate 19 to the inclined surface parts 19C and 19C is provided, the refrigerant | coolant piping 24 is the cooling plate 19 by the vibration at the time of transport. It is possible to avoid a situation where the power device 50 is detached from the power device 50, and it is possible to reliably cool the power element 50.

また、本実施形態によれば、電装箱１８は、冷却板１９と対向する位置に開口部３３Ａを備え、この開口部３３Ａを通じて当該電装箱１８内に露出する冷却板１９の面１９Ａにパワー素子５０を直接取り付けたため、冷却板１９とパワー素子５０との間の熱抵抗を抑えることができ、冷却板１９での冷却効率を向上させることができる。   Further, according to the present embodiment, the electrical box 18 has the opening 33A at a position facing the cooling plate 19, and the power element is provided on the surface 19A of the cooling plate 19 exposed in the electrical box 18 through the opening 33A. Since 50 is directly attached, the thermal resistance between the cooling plate 19 and the power element 50 can be suppressed, and the cooling efficiency at the cooling plate 19 can be improved.

以上、本発明の一実施の形態について説明したが、本発明は、これに限定されるものではない。例えば、本実施形態では、冷却板１９を電装箱１８の背板３３に取り付けた構成としているが、これに限るものではなく、他の面に配置しても良いことはもちろんである。
また、本実施形態では、発熱体として、インテリジェントパワーモジュール５１，５１及びダイオード５２を含むパワー素子５０を例示したが、これに限るものではなく、ハイブリッドＩＣ（Integrated Circuit）を配置する構成に適用しても良いことは勿論である。
また、本実施形態では、冷却板１９は、傾斜面部１９Ｃ，１９Ｃを水平方向に延びる構成としたが、これに限るものではなく、傾斜面部に冷媒配管が配置されるのであれば、当該傾斜面部が垂直方向に延びても良いことは勿論である。
また、本実施形態では、冷媒板１９を傾斜面部１９Ｃ，１９Ｃに配置した状態で冷媒配管２４を固定する固定部材４３を備える構成としているが、これに限るものではなく、例えば、断面形状が略丸形の冷媒配管２４の直管部２４Ａ，２４を一部潰して、その断面形状を少し扁平形状として、その冷媒配管２４の直管部２４Ａ，２４を冷却板１９の傾斜面部１９Ｃ，１９Ｃに形成した溝部４２，４２に嵌合させても良い。この構成によれば、直管部２４Ａ，２４を一部潰すことにより、冷媒配管２４が冷却板１９に固定されることにより、固定部材４３が不要となり、冷媒配管２４と冷却板１９との構成を簡素化することができる。
また、パワー素子５０と冷却板１９との間に、熱伝導性を良好とするパテや塗装を施し、パワー素子５０からの放熱を冷却板１９へ確実に伝えるようにしても良いこと勿論である。
また、本実施形態では、冷媒配管２４を冷媒回路３に直列に接続された構成としているが、これに限るものではなく、冷媒回路３から並列に分岐した分岐管として設けても良い。 Although one embodiment of the present invention has been described above, the present invention is not limited to this. For example, in the present embodiment, the cooling plate 19 is configured to be attached to the back plate 33 of the electrical box 18, but the present invention is not limited to this, and it is needless to say that the cooling plate 19 may be arranged on another surface.
In the present embodiment, the power element 50 including the intelligent power modules 51 and 51 and the diode 52 is exemplified as the heating element. However, the present invention is not limited to this, and the present invention is applicable to a configuration in which a hybrid IC (Integrated Circuit) is arranged. Of course, it may be.
In the present embodiment, the cooling plate 19 has a configuration in which the inclined surface portions 19C and 19C extend in the horizontal direction. However, the present invention is not limited to this, and if the refrigerant pipe is arranged on the inclined surface portion, the inclined surface portion. Of course, may extend in the vertical direction.
Moreover, in this embodiment, although it has set as the structure provided with the fixing member 43 which fixes the refrigerant | coolant piping 24 in the state which has arrange | positioned the refrigerant | coolant plate 19 in inclined surface part 19C, 19C, it is not restricted to this, For example, cross-sectional shape is substantially The straight pipe portions 24A and 24 of the round refrigerant pipe 24 are partially crushed so that the cross-sectional shape is slightly flat, and the straight pipe parts 24A and 24 of the refrigerant pipe 24 are formed on the inclined surface portions 19C and 19C of the cooling plate 19, respectively. You may make it fit in the formed groove parts 42 and 42. FIG. According to this configuration, the straight pipe portions 24 </ b> A and 24 are partially crushed to fix the refrigerant pipe 24 to the cooling plate 19, thereby eliminating the need for the fixing member 43, and the configuration of the refrigerant pipe 24 and the cooling plate 19. Can be simplified.
Of course, a putty or a coating with good thermal conductivity may be applied between the power element 50 and the cooling plate 19 so that the heat radiation from the power element 50 is reliably transmitted to the cooling plate 19. .
In the present embodiment, the refrigerant pipe 24 is connected to the refrigerant circuit 3 in series. However, the present invention is not limited to this, and the refrigerant pipe 24 may be provided as a branch pipe branched in parallel from the refrigerant circuit 3.

１ 室外ユニット
２ 室内ユニット
３ 冷媒回路
１１ 圧縮機
１４ 四方弁
１５ 室外熱交換器
１６ レシーバタンク
１８ 電装箱
１９ 冷却板
１９Ｃ 傾斜面部（傾斜面）
２４ 冷媒配管
２４Ａ 直管部
２４Ｂ 曲管部
３３ 背板
３３Ａ 開口部
４２ 溝部
４３ 固定部材（固定具）
４３Ａ 屈曲部
４３Ｂ 固定部
４４ ねじ穴
５０ パワー素子
５１ インテリジェントパワーモジュール
５２ ダイオード
５５ 領域（発熱体が配置される領域）
１００ 空気調和装置 DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Indoor unit 3 Refrigerant circuit 11 Compressor 14 Four-way valve 15 Outdoor heat exchanger 16 Receiver tank 18 Electrical box 19 Cooling plate 19C Inclined surface part (inclined surface)
24 Refrigerant piping 24A Straight pipe portion 24B Curved pipe portion 33 Back plate 33A Opening portion 42 Groove portion 43 Fixing member (fixing tool)
43A Bent part 43B Fixed part 44 Screw hole 50 Power element 51 Intelligent power module 52 Diode 55 area (area where heating element is arranged)
100 Air conditioner

Claims (4)

発熱体を収納した電装箱の外側に設けられ、前記発熱体と熱的に接続されて当該発熱体を冷却する冷却板と、冷媒が循環する冷媒回路から前記冷却板に冷媒を供給する冷媒配管とを備えた電装箱の冷却構造において、
前記冷却板は、略中央部から両側縁部に向けて傾斜する傾斜面を備え、これら傾斜面に前記冷媒配管をそれぞれ配置し、これら冷媒配管の間に対応する領域に前記発熱体を配置したことを特徴とする電装箱の冷却構造。 A cooling plate that is provided outside the electrical box containing the heating element and is thermally connected to the heating element to cool the heating element; and a refrigerant pipe that supplies the cooling plate to the cooling plate from a refrigerant circuit in which the refrigerant circulates In the cooling structure of the electrical box with
The cooling plate includes inclined surfaces that are inclined from the substantially central portion toward both side edge portions, the refrigerant pipes are arranged on the inclined surfaces, and the heating elements are arranged in regions corresponding to the refrigerant pipes. A cooling structure for an electrical box characterized by that. 前記冷却板は、前記傾斜面に前記冷媒配管が嵌る溝部を設けたことを特徴とする請求項１に記載の電装箱の冷却構造。   The cooling structure for an electrical box according to claim 1, wherein the cooling plate is provided with a groove portion into which the refrigerant pipe fits on the inclined surface. 前記冷媒配管を前記傾斜面に配置した状態で固定する固定具を備えたことを特徴とする請求項１または２に記載の電装箱の冷却構造。   The cooling structure for an electrical box according to claim 1 or 2, further comprising a fixture for fixing the refrigerant pipe in a state of being arranged on the inclined surface. 前記電装箱は、前記冷却板と対向する位置に開口部を備え、この開口部を通じて当該電装箱内に露出する前記冷却板の面に前記発熱体を取り付けたことを特徴とする請求項１乃至３のいずれかに記載の電装箱の冷却構造。   The said electrical equipment box is provided with the opening part in the position facing the said cooling plate, The said heat generating body was attached to the surface of the said cooling plate exposed in the said electrical equipment box through this opening part. 4. The cooling structure for an electrical box according to any one of 3 above.
JP2011286381A 2011-12-27 2011-12-27 Cooling structure of electrical box Pending JP2013135177A (en)

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WO2015074492A1 (en) * 2013-11-25 2015-05-28 唐山轨道客车有限责任公司 Power box of hybrid railway vehicle, and hybrid railway vehicle
JP2016099043A (en) * 2014-11-20 2016-05-30 三菱重工業株式会社 Cooling block and air conditioner
JP2016125734A (en) * 2014-12-26 2016-07-11 ダイキン工業株式会社 Freezer
WO2018051499A1 (en) * 2016-09-16 2018-03-22 三菱電機株式会社 Refrigeration cycle device
CN111213012A (en) * 2017-10-11 2020-05-29 日立江森自控空调有限公司 Outdoor unit and indoor unit of air conditioner

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015074492A1 (en) * 2013-11-25 2015-05-28 唐山轨道客车有限责任公司 Power box of hybrid railway vehicle, and hybrid railway vehicle
JP2016099043A (en) * 2014-11-20 2016-05-30 三菱重工業株式会社 Cooling block and air conditioner
JP2016125734A (en) * 2014-12-26 2016-07-11 ダイキン工業株式会社 Freezer
WO2018051499A1 (en) * 2016-09-16 2018-03-22 三菱電機株式会社 Refrigeration cycle device
JPWO2018051499A1 (en) * 2016-09-16 2019-06-24 三菱電機株式会社 Refrigeration cycle device
US11112130B2 (en) 2016-09-16 2021-09-07 Mitsubishi Electric Corporation Refrigeration cycle apparatus
CN111213012A (en) * 2017-10-11 2020-05-29 日立江森自控空调有限公司 Outdoor unit and indoor unit of air conditioner

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