CN216563303U

CN216563303U - Cooling liquid box

Info

Publication number: CN216563303U
Application number: CN202122393138.0U
Authority: CN
Inventors: 郑安忻; 山口优贵; 驹泽晴辉
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor China Investment Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-05-17
Anticipated expiration: 2031-09-30

Abstract

The problem of the present invention is to provide a coolant tank capable of suppressing a reduction in cooling efficiency and generation of noise. In order to solve the above problem, a coolant tank 1 is provided that is connected to a cooling circuit of an in-vehicle device mounted on a vehicle, and includes: an inlet 31 for allowing the coolant to flow into the coolant tank 1; an outlet 32 for discharging the coolant to the outside of the coolant tank 1; and one or more protrusions 10 formed on the inner surface of the coolant tank 1, and arranged at a position where at least a part thereof overlaps an extension line L1 of the central axis of the inlet 31 in a plan sectional view.

Description

Cooling liquid box

Technical Field

The utility model relates to a cooling liquid tank.

Background

Conventionally, a coolant tank called an expansion tank is known, which is connected to a cooling circuit of an in-vehicle device mounted on a vehicle (see, for example, patent document 1). The coolant tank has various functions of filling the cooling circuit of the in-vehicle device, adjusting the pressure in the cooling circuit, and separating gas from liquid.

[ Prior art documents ]

(patent document)

Patent document 1: japanese laid-open patent publication No. 2015-86767

SUMMERY OF THE UTILITY MODEL

[ problem to be solved by the utility model ]

However, in recent years, in order to cope with the progress of rapid charging technology accompanied by the increase in the capacity of a battery mounted on an electric vehicle and the increase in the amount of heat generation and the required cooling amount due to the increase in the demand for output, it is necessary to increase the flow rate of the cooling liquid. However, when the flow rate of the coolant increases, the amount of gas involved in the coolant increases, and the cooling efficiency decreases. When the flow rate of the coolant increases, the flow velocity near the liquid surface in the coolant tank increases, and noise is generated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a coolant tank capable of suppressing a decrease in cooling efficiency and generation of noise.

[ means for solving problems ]

(1) The present invention provides a coolant tank (for example, the following coolant tank 1) connected to a cooling circuit of an in-vehicle device mounted on a vehicle, the coolant tank including: an inlet (e.g., an inlet 31 described below) for flowing the coolant into the coolant tank; an outlet port (e.g., an outlet port 32 described below) for discharging the coolant to the outside of the coolant tank; and at least one protrusion (for example, a protrusion 10 described below) formed on an inner surface of the coolant tank and disposed at a position overlapping an extension of a central axis of the inlet (for example, an extension L1 of the central axis of the inlet described below) in a plan sectional view.

According to the coolant tank of (1), the flow of the coolant introduced from the inlet port into the coolant tank can be dispersed by providing at least one protrusion on the inner surface of the coolant tank at a position overlapping with an extension of the central axis of the inlet port in a plan sectional view. As a result, according to the coolant tank of (1), the flow velocity of the coolant in the coolant tank can be made uniform, and the flow velocity near the liquid surface can be reduced, and as a result, the amount of entrainment of gas into the coolant can be reduced, and a reduction in cooling efficiency and the generation of noise can be suppressed.

(2) In the coolant tank of (1), the plurality of projections may be formed on a bottom surface (e.g., a bottom surface 33 described below) of the coolant tank, and a length in a horizontal direction orthogonal to a central axis of the inlet (e.g., a length W1 in a horizontal direction L2 of the first projection 11 described below) of a projection (e.g., a first projection 11 described below) closest to the inlet, among the plurality of projections formed on the bottom surface of the coolant tank, may be smaller than a diameter of the inlet (e.g., a diameter D of the inlet described below).

In the coolant tank of (2), a plurality of projections are formed on a bottom surface of the coolant tank, and a length in a horizontal direction orthogonal to a central axis of the inlet port of a projection closest to the inlet port among the projections is set to be smaller than a diameter of the inlet port. Thus, according to the coolant tank (2), since the flow rate of the coolant introduced into the coolant tank from the inlet port can be ensured and the flow of the coolant can be dispersed, the reduction in cooling efficiency and the generation of noise can be more reliably suppressed.

(3) In the coolant tank of (1) or (2), the plurality of projections may be formed on the bottom surface of the coolant tank, and an upper end (e.g., an upper end 121 described below) of at least one projection (e.g., a second projection 12 described below) of the plurality of projections formed on the bottom surface of the coolant tank may be located below an extension of a lower end of the inlet (e.g., an extension L3 of a lower end of the inlet described below).

In the coolant tank of (3), a plurality of projections are formed on the bottom surface of the coolant tank, and the upper end of at least one of the projections is disposed below the extension line of the lower end of the inflow port. Thus, according to the coolant tank of (3), since the flow rate of the coolant introduced into the coolant tank from the inlet port can be ensured and the flow of the coolant can be dispersed more effectively, the reduction in cooling efficiency and the generation of noise can be suppressed more reliably.

(effects of the utility model)

According to the present invention, it is possible to provide a coolant tank capable of suppressing a reduction in cooling efficiency and generation of noise.

Drawings

Fig. 1 is an external view of a coolant tank according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a partially enlarged sectional perspective view of a coolant tank according to an embodiment of the present invention.

Fig. 4 is a sectional view taken along line B-B of fig. 2.

Fig. 5 is a cross-sectional view taken along line C-C of fig. 2.

Fig. 6 is a cross-sectional view taken along line D-D of fig. 2.

Fig. 7 is a plan sectional view showing the flow of the coolant in the coolant tank according to the embodiment of the present invention.

Fig. 8 is a side sectional view showing the flow of the coolant in the coolant tank according to the embodiment of the present invention.

Detailed Description

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Fig. 1 is an external view of a coolant tank according to an embodiment of the present invention. The coolant tank 1 of the present embodiment is an expansion tank and is connected to a closed cooling circuit of an in-vehicle device in an electric vehicle. The coolant tank 1 stores coolant at a specific water level, and is provided with an air chamber above the inside thereof, thereby separating gas such as steam and air in the cooling circuit from the coolant. That is, the coolant tank 1 has various functions of filling the cooling circuit, adjusting the pressure in the cooling circuit, and separating gas from liquid.

As shown in fig. 1, the coolant tank 1 includes an upper tank body 2 and a lower tank body 3. The upper tank body 2 and the lower tank body 3 are both in a bottomed box shape, and

flanges

20 and 30 are formed at the opening edges, respectively. The coolant tank 1 is formed by butt-joining the

flanges

20 and 30 of the upper tank body 2 and the lower tank body 3.

The upper tank body 2 constitutes a part of an air chamber of the coolant tank 1. The upper box main body 2 includes a pressure adjusting unit 21 at an upper portion. The pressure regulating unit 21 includes a pressure regulating valve 22 and a lid 23. When the pressure in the coolant tank 1 rises, the pressure regulating unit 21 opens the pressure regulating valve 22, thereby opening the lid 23 and releasing the gas in the coolant tank 1 to the outside. Thereby, the pressure in the cooling circuit is adjusted.

The lower tank body 3 includes an inlet 31 and an outlet 32. The bottom surface 33 of the lower box body 3 includes a recess 34 recessed downward, an inclined portion 35 inclined upward gradually from the recess 34, an inlet 31 provided in the inclined portion 35, and an outlet 32 provided in the recess 34. More specifically, the inlet 31 extends from the side in the substantially horizontal direction, is connected to the inclined portion 35, and is opened in the horizontal direction. The outlet 32 extends in the vertical direction, is connected to the recess 34 from below, and is open at the top.

The inlets 31 are connected to the upper tank of the radiator via inflow pipes, not shown, and allow the coolant to flow into the coolant tank 1. Each of the outlet ports 32 is connected to a lower tank of the radiator via an unillustrated outlet pipe, and allows the coolant to flow out from the inside of the coolant tank 1 to the outside.

Fig. 2 is a sectional view taken along line a-a of fig. 1. Fig. 3 is a partially enlarged perspective cross-sectional view of the coolant tank 1 of the present embodiment. As shown in fig. 2 and 3, a partition wall 36 is provided in the lower tank body 3 of the coolant tank 1, in an inlet chamber 37 provided with the inlet 31 and an outlet chamber 38 provided with the outlet 32, and the partition wall 36 partitions the inside of the lower tank body 3. The coolant flowing into the coolant tank 1 from the inlet 31 is temporarily stored in the inlet chamber 37. The coolant stored in the inflow chamber 37 is configured such that, after the flow rate increases and the liquid surface reaches the upper end of the partition wall 36, the coolant flows into the outflow chamber 38 and flows out from the outflow port 32 to the outside.

As shown in fig. 2 and 3, the coolant tank 1 includes three protrusions 10 protruding upward on the bottom surface 33 at a position at least partially overlapping with an extension L1 of the central axis of the inlet 31 in a plan sectional view. Specifically, the first protrusion 11, the second protrusion 12, and the third protrusion 13 are provided in this order from the side closer to the inlet 31.

The inflow direction of the coolant flowing in from the inlet 31 coincides with the direction of an extension L1 of the central axis of the inlet 31. Therefore, the coolant flowing in from the inlet port 31 hits three protrusions 10, which are provided on the bottom surface 33 at a position overlapping with an extension line L1 of the center axis of the inlet port 31 in a plan sectional view. As a result, as described in detail in the following paragraphs, the flow of the coolant in the coolant tank 1 can be made uniform, the flow velocity in the vicinity of the liquid surface can be reduced, and the generation of noise and the amount of gas entrainment can be reduced.

Among the plurality of projections 10 formed on the bottom surface 33 of the coolant tank 1, the first projection 11 closest to the inlet port 31 is disposed immediately below the inlet port 31 in the inflow direction of the coolant. The first protrusion 11 extends substantially parallel to the long-side wall of the coolant tank 1 (lower tank body 3) and the partition wall 36. The first protrusion 11 has an R-shape with a chamfered corner. Thereby, the coolant flowing in from the inlet 31 is smoothly dispersed when it collides with the first protrusion 11.

The second projection 12 and the third projection 13 extend substantially parallel to the short side wall of the coolant tank 1 (the lower tank body 3), and extend in a direction substantially perpendicular to the partition wall 36. The length in the extending direction is set to be longer than the third projection 13 than the second projection 12. The second projection 12 and the third projection 13 are formed in a substantially rectangular parallelepiped shape as a whole, and the bottom surface 33 side is formed in a tapered shape.

Fig. 4 is a sectional view taken along line B-B of fig. 2. As shown in fig. 4, the length W1 (also referred to as width W1) of the horizontal direction L2 perpendicular to the central axis of the inlet 31 in the first protrusion 11 closest to the inlet 31 is set smaller than the diameter D of the inlet 31. Similarly, the height H1 of the first protrusion 11 is set to be smaller than the diameter D of the inlet 31. Thus, the first protrusion 11 disperses the flow of the coolant flowing in from the inlet 31, and suppresses the flow force of the coolant reaching the liquid surface. Further, the first protrusion 11 does not excessively suppress the flow of the coolant, and the flow rate of the coolant is ensured.

Fig. 5 is a cross-sectional view taken along line C-C of fig. 2. As shown in fig. 5, the second protrusion 12 and the third protrusion 13 are both provided to stand substantially perpendicular to the plane of the recess 34 constituting the bottom surface 33. The width W2 of the second projection 12 and the width W3 of the third projection 13 are both set to be substantially the same as the width W1 of the first projection 11 described above. The height H2 of the second projection 12 is set to be lower than the height H3 of the third projection 13.

Fig. 6 is a cross-sectional view taken along line D-D of fig. 2. As shown in fig. 6, the upper end 121 of the second protrusion 12 is located below an extension L3 of the lower end of the inflow port 31. That is, the second protrusion 12 is formed such that the upper end 121 thereof is located below an extension line L3 of the lower end of the inflow port 31. Thus, the second protrusions 12 do not excessively suppress the flow of the coolant, so that the flow rate of the coolant is sufficiently ensured and the flow of the coolant is more effectively dispersed.

Next, the flow of the coolant in the coolant tank 1 of the present embodiment will be described with reference to fig. 7 and 8. Here, fig. 7 is a plan sectional view showing the flow of the coolant in the coolant tank 1 of the present embodiment. Fig. 8 is a side sectional view showing the flow of the coolant in the coolant tank 1 of the present embodiment.

As indicated by arrows in fig. 7 and 8, the coolant flowing in from the inlet 31 is first dispersed in the horizontal direction and in the vertical direction by the first protrusions 11. Then, the coolant reaching the second protrusion 12 is also dispersed horizontally and vertically. Further, the coolant reaching the third projection 13 is also dispersed horizontally and vertically.

Thus, in the coolant tank 1 of the present embodiment, the flow of the coolant flowing in is effectively dispersed, and therefore, the flow force of the coolant reaching the liquid surface S is suppressed. Conventionally, the flow of the coolant from the inlet port directly reaches the liquid surface, which causes the liquid surface to turn over, thereby generating noise, and also causes entrainment of gas, but these problems are solved in the coolant tank 1 of the present embodiment.

According to the coolant tank 1 of the present embodiment, the following effects are exhibited.

In the coolant tank 1 of the present embodiment, since the at least one protrusion 10 is provided on the inner surface of the coolant tank 1 at a position overlapping with the extension line L1 of the center axis of the inlet port 31 in a plan sectional view, the flow of the coolant introduced from the inlet port 31 into the coolant tank 1 can be dispersed. Thus, according to the coolant tank 1 of the present embodiment, the flow velocity of the coolant in the coolant tank 1 can be made uniform, and the flow velocity near the liquid surface can be reduced, and as a result, the amount of entrainment of gas into the coolant can be reduced, and a reduction in cooling efficiency and the generation of noise can be suppressed.

In the coolant tank 1 of the present embodiment, the plurality of projections 10 are formed on the bottom surface 33 of the coolant tank 1, and the length W1 of the horizontal direction L2 orthogonal to the central axis of the inlet 31 in the first projection 11 closest to the inlet 31 among the projections 10 is set to be smaller than the diameter D of the inlet 31. Thus, according to the coolant tank 1 of the present embodiment, the flow rate of the coolant introduced from the inlet port 31 into the coolant tank 1 can be ensured, and the flow of the coolant can be dispersed, so that the reduction in cooling efficiency and the generation of noise can be more reliably suppressed.

In the coolant tank 1 of the present embodiment, a plurality of projections 10 are formed on the bottom surface 33 of the coolant tank 1, and the upper end 121 of the second projection 12 of the projections 10 is disposed below the extension L3 of the lower end of the inlet 31. Thus, according to the coolant tank 1 of the present embodiment, the flow rate of the coolant introduced from the inlet port 31 into the coolant tank 1 can be ensured, and the flow of the coolant can be dispersed more effectively, so that the reduction in cooling efficiency and the generation of noise can be more reliably suppressed.

The present invention is not limited to the above-described embodiments, and modifications and improvements within a range in which the object of the present invention can be achieved are included in the present invention.

For example, in the above embodiment, the plurality of projections 10, specifically, the first projection 11, the second projection 12, and the third projection 13 are provided on the bottom surface 33 of the coolant tank 1 so as to overlap with the extension line L1 of the center axis of the inlet port 31 in a plan cross-sectional view, but the present invention is not limited thereto. These projections may be provided on the inner side surfaces of the side walls instead of the bottom surface 3 of the coolant tank 1. The number of the projections is not limited, and may be one or more.

Reference numerals

1 Cooling liquid tank

2 upper side box body

3 lower side box body

10 projection

11 first projection

12 second projection

13 third projection

20 flange

21 pressure regulating part

22 pressure regulating valve

23 cover part

20 flange

31 flow inlet

32 outflow opening

33 bottom surface

34 concave part

35 inclined part

36 partition wall

37 inflow chamber

38 outflow chamber

121 upper end

Diameter of D flow inlet

Height of H1 first projection

Height of H2 second projection

Height of H3 third projection

Extension line of central axis of inlet of L1

L2 horizontal direction perpendicular to the central axis of the inlet

Extension line of lower end of L3 inflow port

S liquid level

Length of W1 first projection in horizontal direction L2

Width of W2 second projection

Width of W3 third projection

Claims

1. A coolant tank connected to a cooling circuit of an in-vehicle device mounted on a vehicle, the coolant tank comprising:

an inlet port for allowing the coolant to flow into the coolant tank;

an outlet port through which the coolant flows out of the coolant tank; and a process for the preparation of a coating,

at least one protrusion formed on an inner surface of the coolant tank,

the protrusion is disposed at a position overlapping with an extension line of the central axis of the inlet port in a plan sectional view.

2. The coolant tank according to claim 1,

a plurality of the projections are formed on the bottom surface of the coolant tank,

the projection closest to the inlet port among the plurality of projections formed on the bottom surface of the coolant tank has a length in the horizontal direction orthogonal to the central axis of the inlet port smaller than the diameter of the inlet port.

3. The coolant tank according to claim 1,

an upper end of at least one of the plurality of projections formed on the bottom surface of the coolant tank is located below an extension of a lower end of the inflow port.

4. The coolant tank according to claim 2,