CN111801542B

CN111801542B - Heat radiator

Info

Publication number: CN111801542B
Application number: CN201980016826.8A
Authority: CN
Inventors: 竹中聪
Original assignee: Isuzu Motors Ltd
Current assignee: Isuzu Motors Ltd
Priority date: 2018-03-07
Filing date: 2019-03-06
Publication date: 2022-11-08
Anticipated expiration: 2039-03-06
Also published as: CN111801542A; PH12020551370A1; WO2019172293A1; JP2019158158A

Abstract

The invention provides a radiator capable of improving cooling performance and inhibiting corrosion. A radiator (100) is provided with a plurality of tubes (1) arranged in parallel and a pair of cases (4, 5) connected to both ends of the plurality of tubes (1), and is divided into a downstream layer (5 b) and an upstream layer (5 a) by a partition member (8) provided inside the case (5). The partition member (8) is formed with through holes (9) as bubble flow paths through which bubbles flow from the downstream layer (5 b) to the upstream layer (5 a).

Description

Heat radiator

Technical Field

The present invention relates to a heat sink.

Background

Conventionally, as a radiator (heat exchanger) mounted on a vehicle, there is known a radiator in which a partition member is provided in one of two cases connected to both ends of a plurality of tubes, and a coolant is made to flow in a meandering manner (for example, see patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2012-97915.

Disclosure of Invention

Problems to be solved by the invention

However, in the conventional radiator described above, bubbles may accumulate in the vicinity of the partition member, which may cause a reduction in cooling performance of the radiator or corrosion of a predetermined member (for example, the partition member and the inner wall of the case).

The invention aims to provide a radiator capable of improving cooling performance and inhibiting corrosion.

Means for solving the problems

A radiator according to an aspect of the present invention includes a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the plurality of tubes, and at least one of the pair of cases has an interior divided into a downstream layer and an upstream layer by a partition member provided in the interior.

Effects of the invention

According to the present invention, the cooling performance can be improved and corrosion can be suppressed.

Drawings

Fig. 1 is a perspective view showing an example of the structure of a heat sink according to an embodiment of the present invention.

Fig. 2A is an enlarged view schematically showing the vicinity of a through hole in a modification of the present invention.

Fig. 2B is an enlarged view schematically showing the vicinity of a through hole in a modification of the present invention.

Fig. 3 is a front view showing an example of the structure of a heat sink according to a modification of the present invention.

Fig. 4 is a front view showing an example of the structure of a heat sink according to a modification of the present invention.

Fig. 5 is a front view showing an example of the structure of a heat sink according to a modification of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the drawings.

A heat sink 100 according to an embodiment of the present invention will be described with reference to fig. 1. Fig. 1 is a perspective view showing an example of the structure of a heat sink 100.

The radiator 100 is a cross-flow radiator mounted on a vehicle, and cools a coolant (an example of a heat transfer medium) that absorbs heat from an internal combustion engine (or an electronic component) by exchanging heat between the air and the coolant.

As shown in fig. 1, the radiator 100 includes a plurality of tubes 1, a plurality of fins 2, a first case 4, and a second case 5.

A plurality of tubes 1 and a plurality of fins 2 are alternately stacked. This laminated portion is referred to as a core.

The tubes 1 are flat tubes through which the coolant flows, and are arranged in parallel.

The first casing 4 is connected to one ends of the plurality of tubes 1, and the second casing 5 is connected to the other ends of the plurality of tubes 1.

The second case 5 is provided with an inlet pipe 6 and an outlet pipe 7, the inlet pipe 6 being for example for flowing coolant that has absorbed heat from the internal combustion engine into the radiator 100, and the outlet pipe 7 being for flowing the cooled coolant out of the radiator 100. Note that the positions where the inlet pipe 6 and the outlet pipe 7 are provided are not limited to the positions shown in fig. 1.

The inlet pipe 6 is connected to a reservoir tank (not shown) to which the coolant overflowing from the radiator 100 due to thermal expansion is delivered when the temperature of the radiator 100 increases.

Further, a flat plate-like partition member 8 is provided inside the second casing 5. The inside of the second casing 5 is divided into the upstream floor 5a and the downstream floor 5b by the partition member 8.

The partition member 8 is provided with a through hole 9 (as an example of an air bubble flow path) for communicating the upstream layer 5a and the downstream layer 5b. The through-holes 9 function as flow paths for allowing the air bubbles (air) retained in the downstream layer 5b to flow from the downstream layer 5b to the upstream layer 5a. The retention of bubbles will be described later.

Note that the formation position of the through hole 9 is not limited to the position shown in fig. 1. Further, a plurality of through holes 9 may be formed.

Next, the flow of the coolant in the radiator 100 configured as described above will be described.

First, the coolant flows from the inlet pipe 6 into the upstream layer 5a of the second tank 5. Then, the coolant flows from the upstream layer 5a into each of the tubes 1 located above the partition member 8 among the plurality of tubes 1, and flows in the direction of the arrow a.

Then, the coolant flows into the first tank 4. Then, the coolant flows from the first tank 4 into each of the tubes 1 located below the position of the partition member 8 among the plurality of tubes 1, and flows in the direction of arrow B (the direction opposite to arrow a).

Then, the coolant flows into the downstream layer 5b of the second tank 5, and flows out of the radiator 100 through the outlet pipe 7.

However, the coolant flowing into the radiator 100 may contain, for example, air bubbles generated outside the radiator 100. Further, the bubbles may be accumulated in the vicinity of the partition member 8 in the downstream layer 5b.

For example, when the radiator 100 is mounted on a vehicle in a state where the longitudinal direction of the tube 1 (in other words, the direction in which the coolant flows in the tube 1) is inclined with respect to the horizontal direction, air bubbles are likely to stagnate.

For example, even when the radiator 100 is mounted on a vehicle such that the longitudinal direction of the pipe 1 is horizontal, air bubbles are likely to accumulate when the vehicle body is inclined.

The stagnation of the bubbles causes a decrease in the cooling performance of the radiator 100 and corrosion of the inner wall surface of the downstream layer 5b and the surface of the partition member 8 on the downstream layer 5b side.

Therefore, in the present embodiment, as described above, the through-hole 9 is formed in the partition member 8. Thus, the bubbles flowing into the downstream layer 5b pass through the through-holes 9 and flow into the upstream layer 5a, and then are sent out of the radiator 100 (e.g., a liquid reservoir tank) from the inlet pipe 6.

Thus, in the present embodiment, the stagnation of air bubbles in the heat sink 100 (in the downstream layer 5 b) can be suppressed. As a result, the cooling performance can be improved and corrosion can be suppressed.

The present invention is not limited to the above-described embodiments, and can be implemented by being appropriately modified within a range not departing from the gist of the present invention. Next, each modified example will be explained. In the drawings, the same components as those in fig. 1 are denoted by the same reference numerals, and the description of these components is omitted as appropriate.

[ modification 1]

In the embodiment, the case where only one partition member 8 is provided has been described as an example, but a plurality of partition members 8 may be provided.

For example, after the partition member 8 is provided in the second casing 5 as shown in fig. 1, the partition member 8 may be further provided in the first casing 4 at a position lower than the position of the partition member 8 provided in the second casing 5. In this case, it is preferable that the through hole 9 is also formed on the partition member 8 provided in the first casing 4. In this case, the outlet pipe 7 is not provided in the second casing 5, but is provided in the lower portion of the first casing 4.

[ modification 2]

In order to facilitate passage of the bubbles through the through-holes 9, a stirring device for reducing the bubbles by stirring may be provided at a position where the bubbles are likely to be retained in the downstream layer 5b. Alternatively, an antifoaming agent may be mixed into the coolant.

[ modification 3]

According to the size and number of the through holes 9 described in the embodiment, it is possible that a large amount of the coolant flows from the upstream layer 5a into the downstream layer 5b via the through holes 9, thereby causing a disturbance in the flow of the coolant in the entire heat sink 100 and affecting the cooling performance.

Therefore, a valve body that can open and close the through hole 9 may be provided to suppress disturbance of the flow of the coolant. This example will be described below with reference to fig. 2A and 2B. Fig. 2A and 2B are enlarged views schematically showing the vicinity of the through hole 9.

As shown in fig. 2A and 2B, a spherical valve element 10 is provided in the upstream layer 5a, and a funnel-shaped valve seat 8a into which the valve element 10 is fitted is formed on the surface of the partition member 8 on the upstream layer 5a side. The valve body 10 has a weight that can move upward in the figure when receiving a pressure equal to or greater than a predetermined value from the downstream layer 5b side.

Thus, when the bubbles do not stay in the vicinity of the surface of the partition member 8 on the downstream layer 5b side and the valve element 10 does not receive a pressure equal to or higher than a predetermined value from the downstream layer 5b side, the valve element 10 closes the through hole 9 as shown in fig. 2A.

Then, when the air bubbles flow into the vicinity of the surface of the partition member 8 on the downstream layer 5B side and the valve body 10 receives a pressure of a predetermined value or more from the downstream layer 5B side via the through hole 9, the valve body 10 moves upward in the figure and opens the through hole 9 as shown in fig. 2B. Thereby, the bubbles pass through the through-holes 9.

In this way, in this example, when the air bubbles do not stagnate, the through-holes 9 are closed, so disturbance of the flow of the coolant can be suppressed.

[ modification 4]

As the opening/closing portion for opening and closing the through hole 9, for example, a valve electrically controlled by a Control device such as an ECU (electronic Control Unit) may be provided. Specific examples thereof will be described below.

For example, it may be that the valve is controlled to repeatedly open and close the through hole 9 at prescribed time intervals.

Alternatively, for example, the valves may also be controlled to: when the volume of the bubbles of the downstream layer 5b detected by the bubble detection sensor (sensor that detects the size of bubbles in the liquid using light) is smaller than a prescribed volume, the through-hole 9 is closed; when the volume of the detected bubbles in the downstream layer 5b is equal to or greater than a predetermined volume, the through-hole 9 is opened.

Alternatively, for example, the valves may also be controlled to: closing the through hole 9 when the inclination angle of the radiator (or the vehicle body) detected by the acceleration sensor is smaller than a predetermined angle; when the detected inclination angle of the heat sink is equal to or greater than a predetermined angle, the through hole 9 is opened.

[ modification 5]

In the embodiment, the case where the bubble flow path through which bubbles flow from the downstream layer 5b to the upstream layer 5a is the through hole 9 formed in the partition member 8 has been described as an example, but the bubble flow path is not limited to this. Next, another example of the bubble flow path will be described with reference to fig. 3.

Fig. 3 is a front view of the cross-flow heat sink 101. Note that, in fig. 3, the tube 1 and the fin 2 shown in fig. 1 are not shown (the same applies to fig. 4 and 5 described later).

The radiator 101 shown in fig. 3 includes a plate-like partition member 8b and a pipe 11. The through-hole 9 shown in fig. 1 is not formed on the partition member 8 b. The pipe 11 is a pipe connecting the downstream layer 5b and the upstream layer 5a, and is provided outside the second tank 5.

In this structure, the bubbles that have flowed into the downstream layer 5b pass through the pipe 11 and flow into the upstream layer 5a.

In this example, the case where the through hole 9 is not formed in the partition member 8b has been described as an example, but the through hole 9 may be further formed in the partition member 8b after the pipe 11 is provided.

[ modification 6]

In the embodiment, the cross-flow radiator 100 is described as an example, but a longitudinal-flow radiator may be used. This example will be described below with reference to fig. 4. Fig. 4 is a front view of the longitudinal flow type heat sink 200.

In the radiator 200 shown in fig. 4, the upper second tank 12 is coupled to one end of the plurality of tubes 1, and the lower first tank 13 is coupled to the other end of the plurality of tubes 1.

The second casing 12 is provided with an inlet pipe 6 and an outlet pipe 7. The inlet pipe 6 is connected to a liquid storage tank (not shown).

The inside of the second casing 12 is divided into an upstream stage 12a and a downstream stage 12b by a plate-like partition member 8.

As an example of the bubble flow path, a through hole 9 (an example of the bubble flow path) for communicating the upstream layer 12a and the downstream layer 12b is formed in the partition member 8.

Next, the flow of the coolant in the radiator 200 configured as described above will be described.

First, the coolant flows from the inlet pipe 6 into the upstream layer 12a of the second tank 12. Then, the coolant flows from the upstream layer 12a into each of the tubes 1 located on the left side in the figure with respect to the position of the partition member 8, and flows in the direction of the arrow C.

Then, the coolant flows into the first tank 13. Then, the coolant flows from the first tank 13 into each of the tubes 1 located on the right side in the figure with respect to the position of the partition member 8, and flows in the direction of the arrow D (the direction opposite to the arrow C).

Then, the coolant flows into the downstream layer 12b of the second case 12, and flows out of the radiator 200 through the outlet pipe 7. At this time, similarly to the above-described embodiment, the bubbles that have flowed into the downstream layer 12b pass through the through holes 9 of the partition member 8 and move to the upstream layer 12a, and then move from the inlet pipe 6 to the outside of the radiator 200 (e.g., a reservoir tank).

[ modification 7]

In the embodiment, the case where the air bubbles are caused to flow from the downstream layer 5b to the upstream layer 5a in order to suppress the stagnation of the air bubbles has been described as an example, but the stagnation of the air bubbles may be suppressed by another means. Next, this specific example will be described with reference to fig. 5. Fig. 5 is a front view of the cross-flow radiator 102.

The structure shown in fig. 5 is different from the structure shown in fig. 1 in that plate-shaped

partition members

14 and 15 are provided instead of the partition member 8.

The partition member 14 has a curved shape in order to facilitate the flow of the coolant from the upstream layer 5a into the plurality of tubes 1. The partition member 15 has a curved shape in order to facilitate the flow of the coolant from the plurality of tubes 1 into the downstream layer 5b.

With this structure, the flow of the coolant in the radiator 102 becomes smoother, and therefore the stagnation of air bubbles in the downstream layer 5b can be suppressed.

Although the

partition members

14 and 15 are illustrated as separate bodies in fig. 5, the

partition members

14 and 15 may be integrally formed.

In fig. 5, the case where the

partition members

14 and 15 have a curved shape is described as an example, but the shape is not limited to this. For example, the flat plate-like partition member 8 shown in fig. 1 may be disposed obliquely.

The above description has been given of the respective modifications. Note that the respective modifications may be implemented by appropriately combining them.

The present application is based on japanese patent application (japanese patent application 2018-040835), filed 3, 7.2018, the contents of which are hereby incorporated by reference.

Industrial applicability

The radiator of the present invention can be applied to a technique of dividing the inside of the case into a plurality of layers to cause fluid to flow in a meandering manner.

Description of the reference numerals

1: a tube;

2: a heat sink;

4. 13: a first case;

5. 12: a second case;

5a, 12a: an upstream layer;

5b, 12b: a downstream layer;

6: an inlet tube;

7: an outlet pipe;

8. 8b, 14, 15: a partition member;

8a: a valve seat;

9: a through hole;

10: a valve body;

11: piping;

100. 101, 102, 200: a heat sink.

Claims

1. A radiator comprising a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the tubes, the interior of at least one of the pair of cases being divided into a downstream layer and an upstream layer by a partition member provided in the interior,

has a through hole for allowing air bubbles to flow from the downstream layer to the upstream layer, and an opening/closing section for opening/closing the through hole by electrical control,

the opening and closing part is controlled to repeatedly open and close the through hole at a prescribed time interval,

the opening and closing part is a valve.

2. The heat sink of claim 1,

the through-hole is at least one through-hole formed on the partition member.

3. A radiator comprising a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the tubes, the interior of at least one of the pair of cases being divided into a downstream layer and an upstream layer by a partition member provided in the interior,

the opening/closing section is controlled to close the through hole when a volume of the bubble existing in the downstream layer is smaller than a predetermined volume; opening the through-hole when a volume of the bubble existing in the downstream layer is the prescribed volume or more,

the opening and closing part is a valve.

4. The heat sink of claim 3,

the through-hole is at least one through-hole formed on the partition member.

5. A radiator comprising a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the plurality of tubes, at least one of the pair of cases being partitioned into a downstream layer and an upstream layer by a partition member provided in the case,

the opening and closing part is controlled to close the through hole when the inclination angle of the radiator is smaller than a specified angle; opening the through hole when the inclination angle of the radiator is more than the specified angle,

the opening and closing part is a valve.

6. The heat sink of claim 5,

the through-hole is at least one through-hole formed on the partition member.

7. A radiator comprising a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the plurality of tubes, at least one of the pair of cases being partitioned into a downstream layer and an upstream layer by a partition member provided in the case,

the air bubble collecting device is provided with a pipe and an opening and closing part, wherein the pipe connects the downstream layer and the upstream layer of the box body at the outer part of the box body and allows air bubbles to flow from the downstream layer to the upstream layer, and the opening and closing part enables the pipe to be opened and closed through electric control,

the opening/closing unit is controlled to repeatedly open and close the pipe at predetermined time intervals.

8. A radiator comprising a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the tubes, the interior of at least one of the pair of cases being divided into a downstream layer and an upstream layer by a partition member provided in the interior,

the opening/closing unit is controlled to close the pipe when the volume of the bubble existing in the downstream layer is smaller than a predetermined volume; and opening the pipe when the volume of the bubble existing in the downstream layer is equal to or greater than the predetermined volume.

9. A radiator comprising a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the tubes, the interior of at least one of the pair of cases being divided into a downstream layer and an upstream layer by a partition member provided in the interior,

the opening/closing unit is controlled to close the pipe when the inclination angle of the radiator is smaller than a predetermined angle; and opening the pipe when the inclination angle of the radiator is greater than or equal to the predetermined angle.

10. A radiator comprising a plurality of tubes arranged in parallel and a pair of cases connected to both ends of the tubes, the interior of at least one of the pair of cases being divided into a downstream layer and an upstream layer by a partition member provided in the interior,

having a through hole for passing bubbles from the downstream layer to the upstream layer,

a spherical valve element that closes the through hole is provided in the upstream layer, a funnel-shaped valve seat into which the valve element is fitted is formed on the surface of the partition member on the upstream layer side, the valve element has a weight that is movable upward when a pressure equal to or greater than a predetermined value is applied from the downstream layer side,

the valve body receives a pressure of the predetermined value or more from the downstream layer through the through hole and moves upward, thereby opening the through hole.