JP6190914B1 - Electric equipment with refrigerant flow path - Google Patents

Electric equipment with refrigerant flow path Download PDF

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JP6190914B1
JP6190914B1 JP2016076299A JP2016076299A JP6190914B1 JP 6190914 B1 JP6190914 B1 JP 6190914B1 JP 2016076299 A JP2016076299 A JP 2016076299A JP 2016076299 A JP2016076299 A JP 2016076299A JP 6190914 B1 JP6190914 B1 JP 6190914B1
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省吾 三木
省吾 三木
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Mitsubishi Electric Corp
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Abstract

【課題】比熱容量の小さい空気を冷媒とする電気機器において、同一平面上を一方方向に冷媒が流れることで空気の顕熱上昇が生じ、吸気口から排気口に向けて冷却能力に分布が生じることで部品レイアウトに制約が発生する課題に対し、冷却性能の均一化、部品レイアウト自由度向上、冷媒流路の圧力損失低減が可能な冷媒流路付き電気機器を提供する。【解決手段】冷媒流路付き電気機器において、電気部品などの発熱体が取り付けられた第１の冷却面に対し、仕切り板により冷媒入口側と冷媒出口側に分離された冷媒流路が第１の冷却面と同一方向に積み重なる構成をもち、冷媒入口側と冷媒出口側の接続部に設置されたファンによって冷媒流れを折り返し、第１の冷却面から冷媒入口側及び冷媒出口側の冷媒流路を遮るように冷却フィンを設置することで、第１の冷却面の冷却性能の分布を抑制する。【選択図】 図２In an electrical device that uses air with a small specific heat capacity as a refrigerant, the flow of the refrigerant in one direction on the same plane causes an increase in sensible heat of the air, and distribution of cooling capacity occurs from the inlet to the outlet. Thus, there is provided an electric device with a refrigerant flow path capable of equalizing cooling performance, improving the degree of freedom of component layout, and reducing the pressure loss of the refrigerant flow path, in response to the problem that the component layout is restricted. In an electric device with a refrigerant flow path, a refrigerant flow path separated into a refrigerant inlet side and a refrigerant outlet side by a partition plate with respect to a first cooling surface to which a heating element such as an electrical component is attached is first. The refrigerant flow is folded back by a fan installed in the connection portion on the refrigerant inlet side and the refrigerant outlet side, and stacked from the first cooling surface to the refrigerant inlet side and the refrigerant outlet side. By installing the cooling fins so as to block the cooling, the distribution of the cooling performance of the first cooling surface is suppressed. [Selection] Figure 2

Description

本発明は、電気部品で発生する熱を冷却するための冷却器及びファンを有する電気機器の冷却構造に関するものである。   The present invention relates to a cooling structure for an electric device having a cooler and a fan for cooling heat generated in the electric component.

電気機器において、電気部品などの発熱体を冷却する場合、その多くが冷却器に取り付けられ、ポンプと液体冷媒を用いて冷却される。これら冷却専用のポンプを含む液体冷媒流路は、機器の搭載レイアウトを制限するため、一部製品では、ファンなどを用いた専用液体冷媒流路を持たない空冷式冷却器が必要とされている。   In an electric device, when a heating element such as an electric component is cooled, most of the heating element is attached to a cooler and is cooled using a pump and a liquid refrigerant. Since the liquid refrigerant flow path including these cooling-dedicated pumps limits the mounting layout of the equipment, some products require an air-cooled cooler that does not have a dedicated liquid refrigerant flow path using a fan or the like. .

従来、例えば発熱性部品とその周辺の部品が実装された基板の上部に、発熱性部品と熱的に接続されたヒートスプレッダを備え、基板とヒートスプレッダで形成された冷媒流路、または、ヒートスプレッダ内に形成された冷媒流路にファンが設置された冷却構造がある。この構造は吸気口から排気口に向けて、同一平面上を一方方向に冷媒が流れる冷媒流路構成である（例えば特許文献１参照）。   Conventionally, for example, a heat spreader that is thermally connected to a heat generating component is provided on the top of a substrate on which a heat generating component and its peripheral components are mounted, and the refrigerant flow path formed by the substrate and the heat spreader or the heat spreader is provided. There is a cooling structure in which a fan is installed in the formed refrigerant flow path. This structure is a refrigerant flow path configuration in which the refrigerant flows in one direction on the same plane from the intake port to the exhaust port (see, for example, Patent Document 1).

特許第４７３５５２８号公報Japanese Patent No. 4735528

特許文献１のように、同一平面上を一方方向に冷媒が流れる冷却器では、空気の顕熱上昇により、吸気口から排気口に向けて空気温度が上昇することで冷却能力が低下し、冷却能力に分布が生じるために部品レイアウトに制約が発生するという課題がある。これは、水あるいは不凍液などの液体冷媒に比べて比熱容量の小さい空気を冷媒とする空冷式冷却器で特に顕著となる。   As in Patent Document 1, in a cooler in which refrigerant flows in one direction on the same plane, the cooling capacity decreases due to the increase in air temperature from the intake port toward the exhaust port due to the increase in sensible heat of the air. There is a problem that the component layout is restricted due to the distribution of the capability. This is particularly noticeable in an air-cooled cooler that uses air having a smaller specific heat capacity as compared to liquid refrigerants such as water or antifreeze.

そこで、本発明は、気体冷媒を用いたファン内装空冷式冷却器をもつ電気機器において、冷却性能の均一化、搭載電気部品のレイアウト自由度向上、冷媒流路の圧力損失低減、および電気機器の小型化を目的としている。   Therefore, the present invention provides an electric device having a fan-internal air-cooled cooler using a gaseous refrigerant, uniform cooling performance, improved layout flexibility of mounted electric components, reduced pressure loss in the refrigerant flow path, and electric device It is aimed at miniaturization.

この発明に係る冷媒流路付き電気機器は、
電気部品が取り付けられた第１の冷却面をもつ筐体と、
前記筐体に取付けられ、前記筐体とともに、前記電気部品を冷却する冷媒を流す冷媒流路を形成する流路カバーと、
前記冷媒流路内に設けられ、前記冷媒流路を、冷媒入口を有する入口側冷媒流路と冷媒出口を有する出口側冷媒流路に分割する仕切り板と、
前記入口側冷媒流路及び前記出口側冷媒流路の接続部に設置されるとともに、前記仕切り板により、吸気口側が前記入口側冷媒流路に、排気口側が出口側冷媒流路に分離されたファンと、
前記第１の冷却面に立設され、前記入口側冷媒流路および前記出口側冷媒流路を貫通して設置された冷却フィンと、
を備え、
前記冷却フィンの少なくとも一部が、前記入口側冷媒流路および前記出口側冷媒流路の両方を遮るように設置され、
前記仕切り板を前記冷媒流路の一部に限定して設けることにより、
前記入口側冷媒流路と前記出口側冷媒流路が、前記第１の冷却面に対し、同一方向に積み重なるように分割された部分と、積み重ならずに前記入口側冷媒流路または前記出口側冷媒流路のみが接するようにされている部分とで構成されていることを特徴とするものである。 The electrical equipment with a refrigerant flow path according to the present invention is
A housing having a first cooling surface to which electrical components are attached;
A flow path cover that is attached to the casing and forms a refrigerant flow path for flowing a refrigerant that cools the electrical component together with the casing;
A partition plate provided in the refrigerant channel, and dividing the refrigerant channel into an inlet side refrigerant channel having a refrigerant inlet and an outlet side refrigerant channel having a refrigerant outlet;
The inlet side is provided in the connecting portion of the refrigerant passage and the outlet side refrigerant passage Rutotomoni, by the partition plate, the air inlet side the inlet side refrigerant passage, the exhaust port side is separated into the outlet side refrigerant passage With fans,
Cooling fins erected on the first cooling surface and installed through the inlet-side refrigerant channel and the outlet-side refrigerant channel ;
Equipped with a,
At least part of the previous SL cooling fins, is provided to intercept both said inlet-side refrigerant flow path and the outlet side refrigerant passage,
By limiting the partition plate to a part of the refrigerant flow path,
The inlet side refrigerant flow path and the outlet side refrigerant flow path are divided so as to be stacked in the same direction with respect to the first cooling surface, and the inlet side refrigerant flow path or the outlet without being stacked. It is comprised by the part by which only the side refrigerant | coolant flow path contacts .

この発明によれば、冷媒出入口付近に設置された冷却フィンに、冷媒入口から取り込んだ低温冷媒が、冷却フィンの冷媒入口側に露出した部分に流れ、冷媒出口付近の発熱体より受熱し顕熱上昇した高温冷媒が、冷却フィンの冷媒出口側に露出した部分に流れることで、冷却フィン全体としては、低温側冷媒と高温側冷媒の中間温度の冷媒が流れた場合と同等の温度となる。また、冷媒入口側と冷媒出口側の接続部付近に設置された冷却フィンは、冷媒入口から上記接続部、すなわち中間地点まで、発熱体により顕熱上昇した冷媒が冷却フィンの冷媒入口側に露出した部分に流れ、ファンを通して折り返し、そのまま冷却フィンの冷媒出口側に露出した部分に流れるため、冷媒入口温度から冷媒出口温度の中間温度の冷媒が流れ、冷媒出入口付近の冷却フィンと同等の温度となる。これらの関係は、冷却フィンが設置された各場所で同様であり、冷却フィンが設置された第１の冷却面での
冷却性能の均一性を確保でき、部品レイアウト自由度が向上することで電気機器の小型化が可能である。また、仕切り板の形状のみで冷媒流路の形状を変更でき、この変更に伴い冷却フィンに流れる冷媒の温度、流速が変化することにより、冷媒流れ方向に沿って、第１の冷却面を、均一な冷却性能を有する部分と、冷却性能に分布を持たせた部分とに分割することができ、搭載する電気部品の発熱量に大きく差がある場合でも、レイアウトが可能となる。
According to the present invention, the low-temperature refrigerant taken from the refrigerant inlet flows into the cooling fins installed near the refrigerant inlet / outlet through the portion exposed to the refrigerant inlet side of the cooling fins, receives heat from the heating element near the refrigerant outlet, and sensible heat The rising high-temperature refrigerant flows to the portion exposed to the refrigerant outlet side of the cooling fin, so that the cooling fin as a whole has a temperature equivalent to that when the intermediate temperature refrigerant between the low-temperature side refrigerant and the high-temperature side refrigerant flows. In addition, the cooling fins installed near the connection between the refrigerant inlet side and the refrigerant outlet side are exposed to the refrigerant inlet side of the cooling fin from the refrigerant inlet to the connection part, i.e., the intermediate point. The refrigerant flows from the refrigerant inlet temperature to the part exposed at the refrigerant outlet side of the cooling fin, and the refrigerant flows at an intermediate temperature from the refrigerant inlet temperature to the refrigerant outlet temperature. Become. These relationships are the same at each location where the cooling fins are installed. The uniformity of the cooling performance on the first cooling surface where the cooling fins are installed can be ensured, and the degree of freedom in component layout improves. Equipment can be downsized. In addition, the shape of the refrigerant flow path can be changed only by the shape of the partition plate, and the temperature and flow velocity of the refrigerant flowing through the cooling fins change with this change, so that the first cooling surface is changed along the refrigerant flow direction, It can be divided into a portion having a uniform cooling performance and a portion having a distribution in the cooling performance, and a layout is possible even when there is a large difference in the amount of heat generated by the mounted electrical components.

さらに、冷媒流れ方向の折り返しにファンを使用することで、折り返し部の圧力損失が低減し、ファンの小型化あるいは冷却性能向上も可能である。   Furthermore, by using the fan for folding in the refrigerant flow direction, the pressure loss at the folded portion is reduced, and the fan can be downsized or the cooling performance can be improved.

本発明の実施の形態１に係る冷媒流路付き電気機器を示す斜視図である。It is a perspective view which shows the electric equipment with a refrigerant | coolant flow path which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る冷媒流路付き電気機器を示す図１のΙ-Ι断面図である。FIG. 2 is a cross-sectional view taken along the line Ι in FIG. 1 illustrating the electric device with a refrigerant flow path according to the first embodiment of the present invention. 本発明の実施の形態１に係る冷媒流路付き電気機器を示す図１のΙΙ-ΙΙ断面図である。FIG. 2 is a cross-sectional view taken along the line ΙΙ in FIG. 1 illustrating the electric device with a refrigerant flow path according to the first embodiment of the present invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の冷媒流路の変形例１を示す図１のΙ-Ι断面図である。FIG. 6 is a cross-sectional view taken along line IV-IV in FIG. 1 showing Modification 1 of the refrigerant flow path of the electric device with a refrigerant flow path according to Embodiment 1 of the present invention. 本発明の実施の形態２に係る冷媒流路付き電気機器の冷媒流路の変形例２を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along line IV-IV in FIG. 1 showing Modification 2 of the refrigerant flow path of the electric device with the refrigerant flow path according to the second embodiment of the present invention. 本発明の実施の形態２に係る冷媒流路付き電気機器の冷媒流路の変形例３を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along line IV-IV in FIG. 1 showing Modification 3 of the refrigerant flow path of the electric device with the refrigerant flow path according to the second embodiment of the present invention. 本発明の実施の形態２に係る冷媒流路付き電気機器の冷媒流路の変形例４を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along line IV-IV in FIG. 1 showing Modification 4 of the refrigerant flow path of the electric device with the refrigerant flow path according to the second embodiment of the present invention. 本発明の実施の形態２に係る冷媒流路付き電気機器の冷媒流路の変形例５を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along line IV-IV in FIG. 1 showing Modification 5 of the refrigerant flow path of the electric device with the refrigerant flow path according to the second embodiment of the present invention. 本発明の実施の形態２に係る冷媒流路付き電気機器の冷媒流路の変形例６を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along the line ΙΙ- FIG. 1 showing a sixth modification of the refrigerant flow path of the electric device with the refrigerant flow path according to the second embodiment of the present invention. 本発明の実施の形態３に係る冷媒流路付き電気機器の冷媒流路の変形例７を示す図１のΙ-Ι断面図である。FIG. 9 is a cross-sectional view taken along the line Ι- FIG. 1 showing Modification 7 of the refrigerant flow path of the electric device with the refrigerant flow path according to the third embodiment of the present invention. 本発明の実施の形態４に係る冷媒流路付き電気機器の冷媒流路の変形例８を示す図１のΙΙ-ΙΙ断面図である。FIG. 10 is a cross-sectional view taken along the line ΙΙ- FIG. 1 showing Modification 8 of the refrigerant flow path of the electric device with the refrigerant flow path according to the fourth embodiment of the present invention. 本発明の実施の形態５に係る冷媒流路付き電気機器の冷媒流路の変形例９を示す図１のΙ-Ι断面図である。FIG. 10 is a cross-sectional view taken along line IV-IV in FIG. 1 showing Modification 9 of the refrigerant flow path of the electric device with the refrigerant flow path according to the fifth embodiment of the present invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の冷媒流路の変形例１０を示す図１のΙΙ-ΙΙ断面図である。FIG. 9 is a cross-sectional view taken along the line ΙΙ- FIG. 1 showing Modification 10 of the refrigerant flow path of the electric device with the refrigerant flow path according to the first embodiment of the present invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の冷媒流路の変形例１１を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along line IV-IV in FIG. 1 showing Modification 11 of the refrigerant flow path of the electric device with a refrigerant flow path according to Embodiment 1 of the present invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の冷却フィンの変形例１を示す図１の流路カバーを除いた図である。It is the figure except the flow path cover of FIG. 1 which shows the modification 1 of the cooling fin of the electric equipment with a refrigerant flow path which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の冷却フィンの変形例２を示す図１の流路カバーを除いた図である。It is the figure except the flow path cover of FIG. 1 which shows the modification 2 of the cooling fin of the electric equipment with a refrigerant flow path which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の冷却フィンの変形例３を示す図１の流路カバーを除いた図である。It is the figure except the flow path cover of FIG. 1 which shows the modification 3 of the cooling fin of the electric equipment with a refrigerant flow path which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の冷却フィンの変形例４を示す図１の流路カバーを除いた図である。It is the figure except the flow path cover of FIG. 1 which shows the modification 4 of the cooling fin of the electric equipment with a refrigerant flow path which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の仕切り板構造の変形例１を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along the line ΙΙ- FIG. 1 showing a first modification of the partition plate structure of the electric device with a refrigerant flow path according to the first embodiment of the present invention. 本発明の実施の形態１に係る冷媒流路付き電気機器の仕切り板構造の変形例２を示す図１のΙΙ-ΙΙ断面図である。FIG. 6 is a cross-sectional view taken along the line ΙΙ- FIG. 1 showing a second modification of the partition plate structure of the electric device with a refrigerant channel according to the first embodiment of the present invention.

実施の形態１．
図１は、本発明の実施の形態１に係わる冷媒流路付電気機器を示すもので、図２、３はそれぞれ、図１の互いに異なる指定された線に沿って切断したときの断面図である。具体的には、図２は図１のΙ-Ι断面図、図３は図１のΙΙ-ΙΙ断面図である。なお、本発明で用いられる冷媒は気体冷媒である。 Embodiment 1 FIG.
1 shows an electrical apparatus with a refrigerant flow path according to Embodiment 1 of the present invention, and FIGS. 2 and 3 are cross-sectional views taken along different designated lines in FIG. 1, respectively. is there. Specifically, FIG. 2 is a cross-sectional view taken along the line Ι- FIG. 1, and FIG. 3 is a cross-sectional view taken along the line ΙΙ-- FIG. The refrigerant used in the present invention is a gas refrigerant.

実施の形態１に係る冷媒流路付き電気機器は、筐体１の第１の冷却面９に設置された電気部品２と、電気部品２を筐体１の内部に内装するために取り付ける部品カバー３と、筐体１に設置され、筐体１とともに囲んだ領域に、電気部品２を冷却する冷媒を流す冷媒流路を形成する流路カバー４と、冷媒流路を、電気部品２が取り付けられた筐体１の第１の冷却面９に対して同一方向に積み重なるように分割する仕切り板５と、仕切り板５により分割された冷媒入口６ａを持つ入口側冷媒流路６と冷媒出口７ａを持つ出口側冷媒流路７の接続部に設置されたファン８と、第１の冷却面９に立設され、入口側冷媒流路６及び出口側冷媒流路７を貫通して設置される冷却フィン１０とで構成される。   The electrical apparatus with a refrigerant flow path according to the first embodiment includes an electrical component 2 installed on the first cooling surface 9 of the housing 1 and a component cover that is attached to mount the electrical component 2 inside the housing 1. 3 and a flow path cover 4 that forms a refrigerant flow path for flowing a refrigerant that cools the electrical component 2 in a region that is installed in the housing 1 and enclosed with the housing 1, and the refrigerant flow path is attached to the electrical component 2. The partition plate 5 that is divided so as to be stacked in the same direction with respect to the first cooling surface 9 of the casing 1 that is formed, the inlet-side refrigerant flow path 6 having the refrigerant inlet 6a divided by the partition plate 5, and the refrigerant outlet 7a The fan 8 installed at the connection portion of the outlet side refrigerant flow path 7 having the above and the first cooling surface 9 is installed and penetrates the inlet side refrigerant flow path 6 and the outlet side refrigerant flow path 7. The cooling fin 10 is used.

電気部品２は、たとえば基板、ダイオードチップ、パワーモジュール、リアクトル、トランス、フィルター回路、バスバー、コネクタ、ハーネスなどにより構成される。   The electrical component 2 includes, for example, a substrate, a diode chip, a power module, a reactor, a transformer, a filter circuit, a bus bar, a connector, a harness, and the like.

冷媒流路には、電気部品２を効率よく冷却するための冷却フィン１０が、入口側冷媒流路６と出口側冷媒流路７を、冷媒の流れる主方向に沿って、各流路を分割し遮るように設置されている。なお、図２中の矢印Ａは、冷媒の流れ方向を示す。冷却フィン１０は、図３に示すように、第１の冷却面９より流路カバー４までのサイズを有することが望ましいが、圧力損失の調整、あるいは一部の第１の冷却面９の冷却能力に分布を持たせるなどの目的のために、図１３、１４に示すように、種々のサイズを取りえる。   A cooling fin 10 for efficiently cooling the electrical component 2 is divided into the refrigerant flow path, dividing the inlet-side refrigerant flow path 6 and the outlet-side refrigerant flow path 7 along the main direction in which the refrigerant flows. It is installed so as to block it. Note that an arrow A in FIG. 2 indicates the flow direction of the refrigerant. As shown in FIG. 3, the cooling fin 10 preferably has a size from the first cooling surface 9 to the flow path cover 4, but adjustment of pressure loss or cooling of a part of the first cooling surface 9 is performed. As shown in FIGS. 13 and 14, various sizes can be used for the purpose of providing a distribution of capabilities.

ファン８は、形体により取り付け位置が異なるが、ファン８の吸気口、ファン８の排気口が、筐体１、あるいは冷却フィン１０によって塞がれないように設置されている。また、筐体１、仕切り板５、流路カバー４などにより、ファン８の吸気口は、入口側冷媒流路６側に、ファン８の排気口は、出口側冷媒流路７側に分離して設けられている。なお、ファン８は、筐体１、流路カバー４、仕切り板５の何れかにねじ止めなどにより固定される。   Although the mounting position of the fan 8 differs depending on the shape, the fan 8 is installed so that the intake port of the fan 8 and the exhaust port of the fan 8 are not blocked by the casing 1 or the cooling fins 10. Further, the housing 1, the partition plate 5, the flow path cover 4, and the like separate the intake port of the fan 8 on the inlet side refrigerant flow path 6 side and the exhaust port of the fan 8 on the outlet side refrigerant flow path 7 side. Is provided. The fan 8 is fixed to any one of the housing 1, the flow path cover 4, and the partition plate 5 by screwing or the like.

仕切り板５は、筐体１と別体で作られることが望ましいが、筐体１、冷却フィン１０などと一体成型で作られていてもよい。筐体１と仕切り板５が別体で作られる場合、仕切り板５には、冷却フィン１０を貫通させるための穴、および冷却フィン１０に仕切り板５をはめ込むことで仕切り板５を挟むように構成される入口側冷媒流路６、出口側冷媒流路７が形成される。また、この仕切り板５は、ねじ止め、カシメなどの種々の方法により筐体１に固定される。なお、仕切り板５は流路カバー４と一体成型で作られていてもよい。   The partition plate 5 is preferably made separately from the housing 1, but may be made by integral molding with the housing 1, the cooling fins 10, and the like. When the housing 1 and the partition plate 5 are made separately, the partition plate 5 is sandwiched between the holes for penetrating the cooling fins 10 and the partition plates 5 fitted into the cooling fins 10. An inlet side refrigerant flow path 6 and an outlet side refrigerant flow path 7 are formed. Further, the partition plate 5 is fixed to the housing 1 by various methods such as screwing and caulking. The partition plate 5 may be made by integral molding with the flow path cover 4.

筐体１は、冷却フィン１０と一体成型するために、ダイカストなどの金型鋳造法で成型されることが望ましいが、筐体１と冷却フィン１０を別体で成型した後、ねじ、ボルト、溶接、ろう付けなど、種々の方法により固定されてもよい。   The casing 1 is preferably molded by a die casting method such as die casting in order to be integrally molded with the cooling fin 10, but after the casing 1 and the cooling fin 10 are molded separately, screws, bolts, It may be fixed by various methods such as welding and brazing.

このような構造によれば、第１の冷却面９に接続され、仕切り板５により分割された入口側冷媒流路６と出口側冷媒流路７を遮るように設置された冷却フィン１０に対し、冷却フィン１０の入口側冷媒流路６に露出した部分に、入口側冷媒すなわち低温側冷媒が流れ、冷却フィン１０の出口側冷媒流路７に露出した部分に出口側冷媒すなわち高温側冷媒が流れることで、冷却フィン１０全体が低温側冷媒と高温側冷媒の中間温度の冷媒が流れる状態と同等の影響を受け、第１の冷却面９の全面で均一な冷却性能を有することができ、第１の冷却面９上での電気部品２のレイアウト自由度が向上する。さらに、入口側冷媒流路６と出口側冷媒流路７の接続部にファン８を配置することで、冷媒入口、もしくは冷媒出口にファン８を設置する構成に対し、折り返し部の圧力損失を低減することができ、ファン８の小型、低コスト化もしくは、風量増加による冷却性能の向上が可能となる。   According to such a structure, the cooling fin 10 connected to the first cooling surface 9 and installed so as to block the inlet side refrigerant flow path 6 and the outlet side refrigerant flow path 7 divided by the partition plate 5 is used. The inlet-side refrigerant, that is, the low-temperature side refrigerant flows through the portion exposed to the inlet-side refrigerant flow path 6 of the cooling fin 10, and the outlet-side refrigerant, that is, the high-temperature side refrigerant flows through the portion exposed to the outlet-side refrigerant flow path 7 of the cooling fin 10. By flowing, the entire cooling fin 10 is affected by the same effect as a state in which a refrigerant having an intermediate temperature between the low temperature side refrigerant and the high temperature side refrigerant flows, and can have uniform cooling performance over the entire first cooling surface 9, The degree of freedom of layout of the electrical component 2 on the first cooling surface 9 is improved. Further, by disposing the fan 8 at the connection portion between the inlet side refrigerant flow path 6 and the outlet side refrigerant flow path 7, the pressure loss at the folded portion is reduced compared to the configuration in which the fan 8 is installed at the refrigerant inlet or the refrigerant outlet. Therefore, it is possible to reduce the size and cost of the fan 8 or to improve the cooling performance by increasing the air volume.

ここで、入口側冷媒流路６と出口側冷媒流路７は、図２、図４に示すように、どちらが第１の冷却面９側に配置されていてもよい。なお、図４中の矢印Ｂは、冷媒の流れ方向を示す。また、ファン８の種類などにより、入口側冷媒流路６と出口側冷媒流路７は、種々の形体を取りえる。   Here, either the inlet side refrigerant flow path 6 or the outlet side refrigerant flow path 7 may be arranged on the first cooling surface 9 side, as shown in FIGS. In addition, the arrow B in FIG. 4 shows the flow direction of a refrigerant | coolant. Further, depending on the type of the fan 8, the inlet side refrigerant flow path 6 and the outlet side refrigerant flow path 7 can take various shapes.

実施の形態２．
図５、６、７、８、９は、本発明の実施の形態２に係る冷媒流路付き電気機器を示すものである。なお、実施の形態２は、仕切り板５の形状のみが実施の形態１と異なるため、異なる部分についてのみ説明し、他の部分については説明を省略する。 Embodiment 2. FIG.
5, 6, 7, 8, and 9 show an electrical apparatus with a refrigerant flow path according to Embodiment 2 of the present invention. In the second embodiment, only the shape of the partition plate 5 is different from that of the first embodiment. Therefore, only different parts will be described, and description of the other parts will be omitted.

実施の形態２は、仕切り板５によってファン８の吸気口側が入口側冷媒流路６に、ファン８の排気口側が出口側冷媒流路７に分離されている。また、仕切り板５を冷媒流路全面ではなく部分的に限定することで、入口側冷媒流路６と出口側冷媒流路７が第１の冷却面９に対して同一方向に積み重なるように分割された部分と、積み重ならずに入口側冷媒流路６または出口側冷媒流路７のみが接するようにされている部分とで構成されている。   In the second embodiment, the partition plate 5 separates the inlet side of the fan 8 into the inlet side refrigerant flow path 6 and the exhaust port side of the fan 8 into the outlet side refrigerant flow path 7. Further, the partition plate 5 is partially limited rather than the entire surface of the refrigerant flow path, so that the inlet side refrigerant flow path 6 and the outlet side refrigerant flow path 7 are stacked in the same direction with respect to the first cooling surface 9. And a portion where only the inlet side refrigerant flow path 6 or the outlet side refrigerant flow path 7 is in contact with each other without being stacked.

このような構成によれば、筐体１、あるいは冷却フィン１０の形状を変更せずに、仕切り板５の形状のみで冷媒流路の入口側冷媒流路６の形状、あるいは出口側冷媒流路７の形状を変更できる。   According to such a configuration, without changing the shape of the casing 1 or the cooling fin 10, only the shape of the partition plate 5 is used, or the shape of the inlet-side refrigerant channel 6 of the refrigerant channel or the outlet-side refrigerant channel. 7 shape can be changed.

これらの冷媒流路形状変更に伴い、冷却フィン１０に流れる冷媒の温度、冷媒の流速が変化することで、冷媒流れ方向に沿って、第１の冷却面９を均一な冷却性能を有する第１の冷却面９と、冷却性能に分布を持たせた第１の冷却面９とに分割することができ、搭載する電気部品２の発熱量に大きく差がある場合でも、レイアウトが可能となる。   As the refrigerant flow path shape changes, the temperature of the refrigerant flowing through the cooling fin 10 and the flow velocity of the refrigerant change, so that the first cooling surface 9 has uniform cooling performance along the refrigerant flow direction. The cooling surface 9 can be divided into the first cooling surface 9 having a distribution of cooling performance, and a layout is possible even when there is a large difference in the amount of heat generated by the mounted electrical component 2.

仕切り板５の形状により、搭載される電気部品２のうち、最も発熱量の大きい部品を冷媒入口付近の第１の冷却面９に配置し、その第１の冷却面９の下部には入口側冷媒流路６のみを配置し、その他の部品が配置される第１の冷却面９下部に、入口側冷媒流路６と出口側冷媒流路７を配置する構成とすることで、発熱量が大きい一部の電気部品２が搭載される第１の冷却面９の領域のみ冷却性能を向上させ、その他の領域は均一な冷却性能を持つ第１の冷却面９に配置してもよい。   Due to the shape of the partition plate 5, among the mounted electrical components 2, the component having the largest heat generation amount is disposed on the first cooling surface 9 near the refrigerant inlet, and the lower part of the first cooling surface 9 has an inlet side. Only the refrigerant flow path 6 is disposed, and the inlet side refrigerant flow path 6 and the outlet side refrigerant flow path 7 are disposed below the first cooling surface 9 where other components are disposed. The cooling performance may be improved only in the region of the first cooling surface 9 where a large part of the electrical component 2 is mounted, and the other regions may be arranged on the first cooling surface 9 having uniform cooling performance.

さらに、このように仕切り板５の形状のみで、冷媒流路の形状を変更できるため、電気機器設計後に、仕様変更などで電気部品２に係る各部品の発熱量が変更になった場合でも、筐体１を作り直すことなく、容易に冷却性能を調整することができる。ここで、冷媒流れ方向と直交する流路断面において、仕切り板面に垂直方向の冷媒流路のサイズを流路高さ、水平方向の冷媒流路のサイズを流路幅と呼ぶ（以下同様）。   Furthermore, since the shape of the refrigerant flow path can be changed only by the shape of the partition plate 5 in this way, even when the calorific value of each component related to the electrical component 2 is changed due to a specification change after the electrical equipment design, The cooling performance can be easily adjusted without recreating the housing 1. Here, in the channel cross section orthogonal to the refrigerant flow direction, the size of the refrigerant channel perpendicular to the partition plate surface is referred to as channel height, and the size of the horizontal refrigerant channel is referred to as channel width (the same applies hereinafter). .

また、図示しないが、仕切り板５は第１の冷却面９に対し、平行でなくても良い。   Although not shown, the partition plate 5 may not be parallel to the first cooling surface 9.

実施の形態３．
図１０は、本発明の実施の形態３に係る冷媒流路付き電気機器を示すものである。なお、実施の形態３の冷媒流路付き電気機器は、仕切り板５の形状のみが実施の形態１と異なるため、異なる部分についてのみ説明し、他の部分については説明を省略する。 Embodiment 3 FIG.
FIG. 10 shows an electric device with a refrigerant flow path according to the third embodiment of the present invention. In addition, since only the shape of the partition plate 5 is different from that of the first embodiment, the electric device with a refrigerant flow channel according to the third embodiment will be described only with respect to different parts, and description of the other parts will be omitted.

実施の形態３では、仕切り板５の形状により、第１の冷却面９と仕切り板５との距離と、仕切り板５と流路カバー４との距離が場所によって異なるよう構成されている。   In Embodiment 3, according to the shape of the partition plate 5, the distance between the first cooling surface 9 and the partition plate 5 and the distance between the partition plate 5 and the flow path cover 4 are different depending on the location.

このような構成によれば、筐体１、あるいは冷却フィン１０の形状を変更せずに、仕切り板５の形状のみで、冷媒流路の入口側冷媒流路６の形状、出口側冷媒流路７の形状を変更できる。これらの冷媒流路の形状変更に伴い、冷却フィン１０に流れる冷媒の流速を調整することができ、第１の冷却面９全体ではなく、部分的に冷却性能を向上させることができる。すなわち、特定領域の冷却性能を向上させることができる。   According to such a configuration, the shape of the inlet side refrigerant flow path 6 of the refrigerant flow path, the shape of the outlet side refrigerant flow path, only the shape of the partition plate 5 without changing the shape of the housing 1 or the cooling fin 10. 7 shape can be changed. Along with the change in the shape of these refrigerant flow paths, the flow rate of the refrigerant flowing through the cooling fins 10 can be adjusted, and the cooling performance can be partially improved rather than the entire first cooling surface 9. That is, the cooling performance of a specific area can be improved.

発熱量の大きい電気部品２を冷媒流れに直交する方向に沿って第１の冷却面９に搭載し、第１の冷却面９側を入口側冷媒流路６、流路カバー４側を出口側冷媒流路７とし、仕切り板５の形状によって、冷媒流れに直交する方向に沿って、出口側冷媒流路７の断面積に対して、入口側冷媒流路６の断面積を小さくすることで、入口側冷媒流路６の低温冷媒の冷媒の流速を速くすることで、冷却フィン１０との熱伝達を向上させ、出口側冷媒流路７の断面積に対して入口側冷媒流路６の断面積が小さい冷媒流路に接する第１の冷却面９の冷却能力を向上させてもよい。   The electric component 2 having a large calorific value is mounted on the first cooling surface 9 along the direction orthogonal to the refrigerant flow, the first cooling surface 9 side being the inlet side refrigerant flow path 6 and the flow path cover 4 side being the outlet side. By reducing the cross-sectional area of the inlet-side refrigerant flow path 6 relative to the cross-sectional area of the outlet-side refrigerant flow path 7 along the direction orthogonal to the refrigerant flow, depending on the shape of the partition plate 5 as the refrigerant flow path 7. By increasing the flow rate of the low-temperature refrigerant in the inlet-side refrigerant flow path 6, heat transfer with the cooling fin 10 is improved, and the inlet-side refrigerant flow path 6 has a cross-sectional area with respect to the outlet-side refrigerant flow path 7. You may improve the cooling capacity of the 1st cooling surface 9 which contact | connects a refrigerant | coolant flow path with a small cross-sectional area.

実施の形態４．
図１１は、本発明の実施の形態４に係る冷媒流路付き電気機器を示すものである。なお、実施の形態４では、冷媒流路形状が実施の形態１の場合とは異なるため、異なる部分についてのみ説明し、他の部分については説明を省略する。 Embodiment 4 FIG.
FIG. 11 shows an electric device with a refrigerant flow path according to the fourth embodiment of the present invention. In the fourth embodiment, the shape of the refrigerant flow path is different from that in the first embodiment, so only the different parts will be described and the description of the other parts will be omitted.

実施の形態４の冷媒流路付き電気機器は、第１の冷却面９と仕切り板５によって構成される冷媒流路と、仕切り板５と流路カバー４によって構成される冷媒流路の流路幅が異なる。すなわち、図１１に示すように、入口側冷媒流路６と出口側冷媒流路７が一方方向に積み重なる第１の冷却面９と、入口側冷媒流路６または出口側冷媒流路７のどちらか一方と一方方向に積み重なる第２の冷却面１１とで構成されている。   The electric device with a refrigerant flow path according to the fourth embodiment includes a refrigerant flow path configured by the first cooling surface 9 and the partition plate 5, and a flow path of the coolant flow path configured by the partition plate 5 and the flow path cover 4. The width is different. That is, as shown in FIG. 11, the first cooling surface 9 in which the inlet-side refrigerant flow path 6 and the outlet-side refrigerant flow path 7 are stacked in one direction, and either the inlet-side refrigerant flow path 6 or the outlet-side refrigerant flow path 7 These are composed of one and a second cooling surface 11 stacked in one direction.

このような構成によれば、発熱密度の低い電気部品２を第２の冷却面１１に配置し、発熱密度の高い電気部品２を第１の冷却面９に配置することで、発熱密度の低い電気部品２が設置された第２の冷却面１１は、冷媒流れ方向に向かって冷媒の顕熱上昇の影響を受け冷却性能に分布を持つが、発熱密度の高い電気部品２が配置された第１の冷却面９は、低温冷媒と高温冷媒の双方が冷却フィン１０に流れ、かつそのどちらか一方が、流路断面積減少により冷媒流速が大きくなることで、冷却性能の向上かつ、冷却能力の分布の抑制をすることで電気部品２のレイアウト自由度が向上する。   According to such a configuration, the electric component 2 having a low heat generation density is arranged on the second cooling surface 11, and the electric component 2 having a high heat generation density is arranged on the first cooling surface 9, so that the heat generation density is low. The second cooling surface 11 on which the electric component 2 is installed has a cooling performance distribution due to the influence of the sensible heat rise of the refrigerant in the refrigerant flow direction, but the second cooling surface 11 on which the electric component 2 having a high heat generation density is arranged. 1 has a cooling surface 9 that has both a low-temperature refrigerant and a high-temperature refrigerant flowing through the cooling fins 10, and one of the cooling surfaces 9 has an increased cooling flow rate due to a reduction in the cross-sectional area of the flow path. The degree of freedom in the layout of the electrical component 2 is improved by suppressing the distribution of.

また、第１の冷却面９と第２の冷却面１１の実装面の高さの違いを利用して、高さなどのサイズが違う電気部品２をそれぞれの面に搭載することで、レイアウト自由度を向上させることも可能となる。   In addition, by using the difference in height between the mounting surfaces of the first cooling surface 9 and the second cooling surface 11, the electrical components 2 having different sizes such as height can be mounted on the respective surfaces, thereby allowing freedom in layout. It is also possible to improve the degree.

実施の形態５．
図１２は、本発明の実施の形態５に係る冷媒流路付き電気機器を示すものである。なお、実施の形態５では、電気部品２の第１の冷却面９、冷媒流路形状が実施の形態１と異なるため、異なる部分についてのみ説明し、他の部分については説明を省略する。 Embodiment 5. FIG.
FIG. 12 shows an electric device with a refrigerant flow path according to the fifth embodiment of the present invention. In the fifth embodiment, since the first cooling surface 9 and the refrigerant flow path shape of the electrical component 2 are different from those in the first embodiment, only different portions will be described, and description of other portions will be omitted.

実施の形態５は、電気部品２を実装する筐体１の第１の冷却面９に加え、冷媒流路を挟んで対向する第３の冷却面１２にも電気部品２を実装されている。   In the fifth embodiment, in addition to the first cooling surface 9 of the housing 1 on which the electrical component 2 is mounted, the electrical component 2 is also mounted on the third cooling surface 12 that faces the refrigerant flow path.

このような構成によれば、電気部品２を第１の冷却面９のみならず、第３の冷却面１２にも実装することが出来るため、高密度な実装が可能となり、電気機器の小型化などが可能となる。   According to such a configuration, since the electrical component 2 can be mounted not only on the first cooling surface 9 but also on the third cooling surface 12, high-density mounting is possible, and downsizing of the electrical equipment is possible. It becomes possible.

冷却フィンは、第１の冷却面９と第３の冷却面１２の双方に接続されていることが望ましいが、発熱密度が高い電気部品２が実装された第１の冷却面９のみに冷却フィン１０が設けられ、冷却フィン１０を必要としない発熱密度が低い電気部品２をフィンが接続されていない第３の第１の冷却面９に搭載してもよい。   The cooling fins are preferably connected to both the first cooling surface 9 and the third cooling surface 12, but only the first cooling surface 9 on which the electrical component 2 having a high heat generation density is mounted is provided. 10 may be mounted on the third first cooling surface 9 to which the fins are not connected.

以上、本発明の各実施の形態について順に説明したが、各図は、各実施の形態に係る冷媒流路付き電気機器の一例を示したものであり、本発明は、その発明の範囲内において、各実施の形態を自由に組み合わせたり、各実施の形態を適宜、変形、省略することが可能である。   As mentioned above, although each embodiment of this invention was described in order, each figure shows an example of the electric equipment with a refrigerant flow path concerning each embodiment, and this invention is within the scope of the invention. The embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

例えば、各図中の冷却フィン１０はストレートで図示したが、図１５、１６、１７、１８に示すように、ピンフィン、オフセットフィン、ウェーブフィンなどは、種々の形状をとりえる。   For example, although the cooling fin 10 in each drawing is illustrated as being straight, as shown in FIGS. 15, 16, 17, and 18, pin fins, offset fins, wave fins, and the like can take various shapes.

また、流路の入口、出口は、各図中では、同一平面で図示したが、それぞれが異なる面に配置されていてもよい。   Moreover, although the inlet and outlet of the flow path are shown in the same plane in each drawing, they may be arranged on different planes.

また、仕切り板５は、冷却フィン１０形状に対してクリアランスを設けた形状、あるいは冷却フィン１０が先端に向けて細くなる形状を持つことで、仕切り板５の位置決め機構を持つ構成、あるいは図１９、２０に示すように、冷却フィン１０が段付き形状を持つことで、仕切り板５の位置決め機構と冷却フィン１０と仕切り板５の接触面積の増加による空気抜け防止機構を兼ねる構成など、種々の形状を取りえる。   Further, the partition plate 5 has a configuration in which a clearance is provided with respect to the shape of the cooling fin 10 or a shape in which the cooling fin 10 becomes narrower toward the tip, so that the partition plate 5 has a positioning mechanism, or FIG. 20, since the cooling fin 10 has a stepped shape, various configurations such as a positioning mechanism for the partition plate 5 and an air escape prevention mechanism by increasing the contact area between the cooling fin 10 and the partition plate 5 are provided. Take shape.

さらに、各図で図示した流路カバー４は板状であるが、升状のカバーになっていてもよい。また、筐体１は、図３に示した断面において、電気部品２側の部品カバー３として升状の部品カバー３としたが、例えば筐体１の壁面を電気部品２の高さ以上とし、板状の部品カバー３を取り付けてもよい。   Furthermore, although the flow path cover 4 illustrated in each drawing is plate-shaped, it may be a bowl-shaped cover. Further, in the cross section shown in FIG. 3, the casing 1 is a bowl-shaped component cover 3 as the component cover 3 on the electric component 2 side. For example, the wall surface of the casing 1 is set to be equal to or higher than the height of the electric component 2. A plate-shaped component cover 3 may be attached.

１ 筐体、２ 電気部品、３ 部品カバー、４ 流路カバー、５ 仕切り板、６ 入口側冷媒流路、６ａ 冷媒入口、７ 出口側冷媒流路、７ａ 冷媒出口、８ ファン、９ 第１の冷却面、１０ 冷却フィン、１１ 第２の冷却面、１２ 第３の冷却面   DESCRIPTION OF SYMBOLS 1 Case, 2 Electrical components, 3 Parts cover, 4 Flow path cover, 5 Partition plate, 6 Inlet side refrigerant | coolant flow path, 6a Refrigerant inlet, 7 Outlet side refrigerant | coolant flow path, 7a Refrigerant outlet, 8 Fan, 9 1st Cooling surface, 10 Cooling fin, 11 Second cooling surface, 12 Third cooling surface

Claims (4)

電気部品が取り付けられた第１の冷却面をもつ筐体と、
前記筐体に取付けられ、前記筐体とともに、前記電気部品を冷却する冷媒を流す冷媒流路を形成する流路カバーと、
前記冷媒流路内に設けられ、前記冷媒流路を、冷媒入口を有する入口側冷媒流路と冷媒出口を有する出口側冷媒流路に分割する仕切り板と、
前記入口側冷媒流路及び前記出口側冷媒流路の接続部に設置されるとともに、前記仕切り板により、吸気口側が前記入口側冷媒流路に、排気口側が出口側冷媒流路に分離されたファンと、
前記第１の冷却面に立設され、前記入口側冷媒流路および前記出口側冷媒流路を貫通して設置された冷却フィンと、
を備え、
前記冷却フィンの少なくとも一部が、前記入口側冷媒流路および前記出口側冷媒流路の両方を遮るように設置され、
前記仕切り板を前記冷媒流路の一部に限定して設けることにより、
前記入口側冷媒流路と前記出口側冷媒流路が、前記第１の冷却面に対し、同一方向に積み重なるように分割された部分と、積み重ならずに前記入口側冷媒流路または前記出口側冷媒流路のみが接するようにされている部分とで構成されていることを特徴とする冷媒流路付き電気機器。 A housing having a first cooling surface to which electrical components are attached;
A flow path cover that is attached to the casing and forms a refrigerant flow path for flowing a refrigerant that cools the electrical component together with the casing;
A partition plate provided in the refrigerant channel, and dividing the refrigerant channel into an inlet side refrigerant channel having a refrigerant inlet and an outlet side refrigerant channel having a refrigerant outlet;
The inlet side is provided in the connecting portion of the refrigerant passage and the outlet side refrigerant passage Rutotomoni, by the partition plate, the air inlet side the inlet side refrigerant passage, the exhaust port side is separated into the outlet side refrigerant passage With fans,
Cooling fins erected on the first cooling surface and installed through the inlet-side refrigerant channel and the outlet-side refrigerant channel ;
Equipped with a,
At least part of the previous SL cooling fins, is provided to intercept both said inlet-side refrigerant flow path and the outlet side refrigerant passage,
By limiting the partition plate to a part of the refrigerant flow path,
The inlet side refrigerant flow path and the outlet side refrigerant flow path are divided so as to be stacked in the same direction with respect to the first cooling surface, and the inlet side refrigerant flow path or the outlet without being stacked. An electric device with a refrigerant flow path , characterized in that it is configured with a portion that is in contact with only the side refrigerant flow path . 前記冷媒の流れ方向と直交する前記冷媒流路の流路断面の、前記第１の冷却面に対して垂直な方向のサイズである流路高さが、前記仕切り板により、入口側冷媒流路と出口側冷媒流路で異なるように構成されていることを特徴とする請求項１に記載の冷媒流路付き電気機器。 The flow path height, which is the size in the direction perpendicular to the first cooling surface, of the cross section of the refrigerant flow path orthogonal to the flow direction of the refrigerant is determined by the partition plate so that the inlet side refrigerant flow path The electrical apparatus with a refrigerant flow path according to claim 1, wherein the electric apparatus is configured so as to be different from each other at the outlet side refrigerant flow path. 前記冷媒の流れ方向と直交する前記冷媒流路の流路断面の、前記第１の冷却面に対して垂直な方向に直交する方向のサイズである流路幅が、前記筐体により、前記入口側冷媒流路と前記出口側冷媒流路で異なるように設定され、
前記入口側冷媒流路と前記出口側冷媒流路の両方と同一方向に積み重なる前記第１の冷却面と、
前記入口側冷媒流路と前記出口側冷媒流路のうち、どちらか一方と同一方向に積み重なる第２の冷却面を持つことを特徴とする請求項１に記載の冷媒流路付き電気機器。 A flow path width that is a size in a direction orthogonal to a direction perpendicular to the first cooling surface of a cross section of the refrigerant flow path orthogonal to the flow direction of the refrigerant is determined by the housing. The side refrigerant flow path and the outlet side refrigerant flow path are set differently,
The first cooling surface stacked in the same direction as both the inlet-side refrigerant flow path and the outlet-side refrigerant flow path;
The electrical apparatus with a refrigerant flow path according to claim 1, further comprising a second cooling surface that is stacked in the same direction as one of the inlet-side refrigerant flow path and the outlet-side refrigerant flow path. 前記筐体は、前記第１の冷却面に対し前記冷媒流路を挟んで対向する第３の冷却面を有し、
前記第３の冷却面に電気部品が取り付けられていることを特徴とする請求項１から３のいずれか１項に記載の冷媒流路付き電気機器。 The housing has a third cooling surface facing the first cooling surface across the refrigerant flow path,
The electrical device with a refrigerant flow path according to any one of claims 1 to 3 , wherein an electrical component is attached to the third cooling surface.
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