阅读说明：本技术 液冷式冷却器 (Liquid-cooled cooler ) 是由 新一贵 中村拓哉 田村正佳 于 2018-03-19 设计创作，主要内容包括：液冷式冷却器(1)利用配置于散热片(2b、3b)之间的分隔构件(4)形成入口集管区域(6)和出口集管区域(9)。当将制冷剂向流入口(31)的流入方向设为Y方向,将与Y方向正交的方向设为X方向时,分隔构件(4)使在Y方向上流入到入口集管区域(6)的制冷剂一边由于分隔壁(43)而使行进方向弯曲一边向入口流路(7)引导,从而使穿过了集管区域(6)的制冷剂以基本相等的流速流入入口流路(7)的整个区域,进而在X方向上以均匀的流速流入散热区域(11)的一个侧面。由此,能在发热元件(50)的设置面上得到均匀的冷却效果。(A liquid-cooled cooler (1) has an inlet header region (6) and an outlet header region (9) formed by a partition member (4) disposed between fins (2b, 3 b). When the inflow direction of the refrigerant to the inflow port (31) is a Y direction, and the direction orthogonal to the Y direction is an X direction, the partition member (4) guides the refrigerant flowing into the inlet header region (6) in the Y direction to the inlet flow path (7) while bending the direction of travel by the partition wall (43), so that the refrigerant passing through the header region (6) flows into the entire region of the inlet flow path (7) at substantially equal flow rates, and further flows into one side surface of the heat dissipation region (11) at a uniform flow rate in the X direction. This enables a uniform cooling effect to be obtained on the mounting surface of the heating element (50).)

1. A liquid-cooled chiller, comprising:

a heat sink having a first fin;

a sleeve having a second heat radiation fin and forming a cooling container together with the heat sink; and

a partition member disposed between the first and second heat radiation fins disposed to face each other in the cooling container,

the cooling container has an inlet and an outlet for a refrigerant on a pair of side wall surfaces facing each other, and has an inlet channel and an outlet channel provided in parallel with each other along the other pair of side wall surfaces facing each other,

the partition member has: a pair of plate portions that are in contact with the first and second fins, respectively; and a partition wall that connects the pair of plate portions, forms two-layer heat dissipation regions by one of the plate portions and the first fins and the other of the plate portions and the second fins, and forms an inlet header region and an outlet header region between the two-layer heat dissipation regions by the pair of plate portions and the partition wall,

The inlet header region communicating with the inflow port, the outlet header region communicating with the outflow port, and two layers of the heat dissipation regions communicating with the inlet header region via the inlet flow path and communicating with the outlet header region via the outlet flow path,

when the inflow direction of the refrigerant to the inflow port is defined as a Y direction and a direction orthogonal to the Y direction is defined as an X direction in a plane parallel to the mounting surface of the first fin, the partition member guides the refrigerant flowing into the inlet header region in the Y direction to the inlet flow path while curving in the traveling direction by the partition wall, and flows from the inlet flow path to the two-stage heat dissipation region in the X direction.

2. The liquid-cooled chiller as set forth in claim 1,

the partition wall has a linear, polygonal, or curved shape when viewed from a direction perpendicular to the surface of the plate portion.

3. The liquid-cooled chiller as set forth in claim 2,

the flow path cross-sectional area of the inlet header region decreases continuously or in stages from the inlet port side toward the outlet port side.

4. Liquid-cooled cooler according to claim 2 or 3,

a surface of the heat sink opposite to the first fin and a surface of the sleeve opposite to the second fin are provided surfaces on which a plurality of heat generating elements are arranged in the Y direction, and the partition wall is shaped such that: the flow rate of the refrigerant passing through the heat dissipation region corresponding to the installation location of the heat generating element is made larger than the flow rate of the refrigerant passing through the heat dissipation region not corresponding to the installation location.

5. Liquid cooled chiller as claimed in any one of claims 1 to 4,

the partition member includes two members having a U-shaped cross-sectional shape, by which the inlet header region and the outlet header region are separately formed.

6. Liquid-cooled cooler according to any of the claims 1 to 5,

the liquid-cooled cooler includes a partition plate that divides the interior of the cooling container into a plurality of regions adjacent in the Y direction, each of the regions having the inlet header region, the inlet flow path, the heat dissipation region, the outlet flow path, and the outlet header region,

The partition plate has an opening portion that communicates the outlet header region of a region close to the inflow port and the inlet header region of a region far from the inflow port, of the two regions adjacent to each other.

7. Liquid cooled chiller as claimed in any one of claims 1 to 6,

in the partition member, the partition wall is an elastic member having elasticity in a direction perpendicular to a surface of the plate portion, and the pair of plate portions is disposed in close contact with the first heat radiation fin and the second heat radiation fin.

8. The liquid-cooled chiller as set forth in claim 7,

a plurality of leaf springs supporting the outer peripheral portions of the plate portions are provided between the pair of plate portions.

9. Liquid cooled chiller as claimed in any one of claims 1 to 8,

in the partition member, a resin material having a lower thermal conductivity than the plate portions is joined or bonded to surfaces of the pair of plate portions that are in contact with the first heat sink and the second heat sink.

Technical Field

The present invention relates to a liquid-cooled cooler for cooling a heat generating element.

Background

The SiC chip of the power semiconductor and the like are high in cost, and reduction in chip size is indispensable. As a result, since the heat generation density increases and the temperature becomes high, a liquid-cooled cooler having higher cooling performance than a conventional air-cooled cooler is generally used.

For example, patent document 1 discloses a liquid-cooled cooler in which a flow path has a 3-layer structure, heat dissipation fins are disposed as heat dissipation regions in an upper layer and a lower layer, and an intermediate layer is used as an inlet/outlet for a refrigerant. In this conventional example, an inlet header region and an outlet header region partitioned by a partition wall are formed in the other region of the heat radiation region, and the inlet and the outlet of the coolant can be provided at any position over the entire outer surface of the inlet header region and the outlet header region, respectively.

Further, patent document 2 discloses a cooler including: a refrigerant introduction flow path in which an inlet port and an outlet port for a refrigerant are formed in the same wall surface of the water jacket, and which extends from the inlet port; a refrigerant discharge flow path arranged in parallel with the refrigerant introduction flow path and extending toward the discharge port; and a cooling flow path in which a radiator formed at a position where the refrigerant introduction flow path and the refrigerant discharge flow path communicate with each other is disposed. In this conventional example, a guide portion for guiding the refrigerant toward one side surface of the radiator is disposed in the refrigerant introduction flow path, and a drift in the flow of the refrigerant flowing into the cooling flow path in a deviated manner is eliminated.

Disclosure of Invention

Technical problem to be solved by the invention

In patent document 1, the degree of freedom in the positions where the inlet and outlet of the coolant are disposed is increased by providing the inlet header region and the outlet header region. However, the conventional liquid-cooled cooler is generally limited by the layout of the pipes, and the positions of the inflow port and the outflow port of the refrigerant are generally fixed. Therefore, as the number of the heat generating elements to be installed increases, the cooler is enlarged in the refrigerant traveling direction, thereby securing the installation surface of the heat generating elements. In this case, since the heat generating elements are arranged in the traveling direction of the refrigerant, there is a problem that the temperature of the refrigerant immediately below the heat generating element disposed on the outlet side of the flow is higher than that of the flow inlet side.

Further, the distance of the flow path in the cooler is increased as the cooler is enlarged, and the penetration distance of the fin region, which is a main cause of the pressure loss, is extended, thereby increasing the pressure loss. Further, when a flow rate adjusting header is provided beside the heat radiation region to increase the cross-sectional area of the flow path, the projected area of the cooler becomes large, which causes a problem that the cooler becomes large.

In patent document 2, since the coolant introduction flow path and the cooling flow path in which the radiator is disposed are orthogonal to each other, the penetration distance of the fin region does not extend even if the cooler is enlarged in the coolant traveling direction. However, since the refrigerant introduction flow path extends, the effect of the guide portion is weakened, and it is difficult to guide the refrigerant toward one side surface of the radiator without deviation. Further, as described in patent document 2, when the region for curving the traveling direction of the refrigerant is provided at a portion other than the heat dissipation region, the projected area of the cooler becomes large, and an increase in size cannot be avoided.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a liquid-cooled cooler capable of obtaining a uniform cooling effect on an installation surface while suppressing an increase in pressure loss and an increase in size of the device due to an increase in the installation surface of a heat generating element.

Technical scheme for solving technical problem

The invention discloses a liquid-cooled cooler, comprising: a heat sink having a first fin; a sleeve having a second heat radiation fin and forming a cooling container together with the heat sink; and a partition member disposed between first and second fins disposed to face each other in the cooling container, the cooling container having an inlet and an outlet for a refrigerant on a pair of opposing side wall surfaces, respectively, and having an inlet channel and an outlet channel provided in parallel with each other along the other pair of opposing side wall surfaces, the partition member including: a pair of plate portions that are in contact with the first and second fins, respectively; and a partition wall that connects the pair of plate portions, forms a two-stage heat dissipation region by the one plate portion and the first fin and the other plate portion and the second fin, and forms an inlet header region and an outlet header region between the two-stage heat dissipation region by the pair of plate portions and the partition wall, the inlet header region communicating with the inlet port, the outlet header region communicating with the outlet port, and the two-stage heat dissipation region communicating with the inlet header region via the inlet flow path and communicating with the outlet header region via the outlet flow path, wherein the partition member guides the refrigerant flowing into the inlet header region in the Y direction to the inlet flow path while bending the traveling direction by the partition wall when the inflow direction of the refrigerant to the inlet flow path is set to the Y direction and the direction orthogonal to the Y direction is set to the X direction in a plane parallel to the installation surface of the first fin, flows from the inlet flow path to the two-layer heat dissipation area in the X direction.

Effects of the invention

According to the liquid-cooled cooler disclosed in the present invention, the inlet header region and the outlet header region are formed by the partition member disposed between the two heat radiation regions, and the refrigerant flowing from the inlet port into the inlet header region in the Y direction is guided to the inlet flow path while being bent in the traveling direction by the partition wall, so that the refrigerant passing through the header region can flow into the entire region of the inlet flow path at substantially equal flow rates, and further flow into the heat radiation regions at uniform flow rates in the X direction. This can provide a uniform cooling effect over the entire heat dissipation area. Further, even in the case where the cooling container is enlarged in the Y direction, since the distance of the refrigerant passing through the fins is constant, an increase in pressure loss can be suppressed. Further, since the inlet header region and the outlet header region are provided between the two heat dissipation regions, the device can be suppressed from being enlarged.

Objects, features, aspects and effects of the present invention other than those described above will become apparent from the following detailed description of the present invention with reference to the accompanying drawings.

Drawings

Fig. 1 is an exploded perspective view illustrating a structure of a liquid-cooled cooler according to a first embodiment.

Fig. 2 is a plan view showing a liquid-cooled cooler according to the first embodiment.

Fig. 3 is a sectional perspective view showing a liquid-cooled cooler according to a first embodiment.

Fig. 4 is an enlarged cross-sectional perspective view showing a part of a liquid-cooled cooler according to a first embodiment.

Fig. 5 is a diagram illustrating the flow of the refrigerant in the liquid-cooled cooler according to the first embodiment.

Fig. 6 is a perspective view showing a modification of the partition member of the liquid-cooled cooler according to the first embodiment.

Fig. 7 is a perspective view showing another modification of the partition member of the liquid-cooled cooler according to the first embodiment.

Fig. 8 is an exploded perspective view illustrating the structure of a liquid-cooled cooler according to a second embodiment.

Fig. 9 is a plan view showing a liquid-cooled cooler according to a second embodiment.

Fig. 10 is an enlarged sectional perspective view showing a part of a liquid-cooled cooler according to a second embodiment.

Fig. 11 is an exploded perspective view illustrating the structure of a liquid-cooled cooler according to a third embodiment.

Fig. 12 is a plan view showing a liquid-cooled cooler according to a third embodiment.

Fig. 13 is a sectional view showing a liquid-cooled cooler according to a third embodiment.

Fig. 14 is a sectional view showing a liquid-cooled cooler according to a fourth embodiment.

Fig. 15 is a plan view showing a liquid-cooled cooler according to a fifth embodiment.

Fig. 16 is a sectional view showing a liquid-cooled cooler according to a fifth embodiment.

Fig. 17 is a sectional view showing a liquid-cooled cooler according to a sixth embodiment.

Detailed Description