Radiator
By introducing an extension into the outlet pipe to adjust the flow of cooling water, the flow of each flat hose in the radiator is uniformized, and the problems of reducing heat exchange performance and increasing thermal stress caused by uneven cooling water flow are solved. Improves the performance and durability of the radiator.
Patent Information
- Application Number
- CN202410833098.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-06-30
- Filing Date
- 2024-06-26
- Publication Date
- 2024-12-31
AI Technical Summary
In existing radiators, uneven flow rate of cooling water leads to a decrease in heat exchange performance and an increase in thermal stress generated by flat hoses, affecting the performance and durability of the radiator.
In the design of the outlet pipe, the extension is introduced so that it extends from one side of the outlet box to the innermost center position of the flat hose to the range from the opening end of the second nearest flat hose to form an internal flow adjustment mechanism , avoid concentrated flow and achieve uniform flow in each flat hose.
Through flow uniformization, the thermal stress generated by the flat hose is reduced, and the performance and durability of the radiator are improved.
Smart Images
Figure CN119223040A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a radiator. Background Art
[0002] In order to cool the engine of construction machinery or industrial machinery, a radiator (heat exchanger) is provided in a cooling circuit. In the prior art, the following radiator is known as the radiator, which comprises: a core portion, in which a plurality of rows of flat hoses are arranged in the width direction; and an inlet box and an outlet box, which are arranged at both ends of the core portion in a manner of connecting the two ends of the flat hoses, and the radiator is configured such that an inlet pipe for allowing cooling water in the cooling circuit to flow into the radiator is connected to one side of the row direction of the flat hoses in the inlet box, and an outlet pipe for allowing cooling water to flow out of the radiator is connected to one side of the row direction of the flat hoses in the outlet box on the same side as the inlet pipe.
[0003] Usually, a thermostat is provided in the cooling circuit to control the opening and closing of the flow of cooling water from the engine to the radiator. However, when the engine is started in a low-temperature environment, the opening and closing of the thermostat is repeated in a short period of time, and each time the thermostat opens, the cooling water heated by the engine flows into the low-temperature radiator, thereby generating thermal stress in the flat hose.
[0004] Therefore, in the related art, in order to improve the durability against the thermal stress, a technique of providing a reinforcing member on the flat hose has been proposed (for example, refer to Patent Document 1). [Prior art literature] [Patent Document]
[0005] Patent Document 1: Japanese Patent Publication No. 2019-45134 Summary of the invention [Technical problem to be solved by the invention]
[0006] In the above-mentioned type of radiator in which the inlet pipe and the outlet pipe are arranged on one side of the row direction of the flat hoses in the inlet box and the outlet box, the distance from the opening of the flat hose to the opening of the inlet pipe or the outlet pipe differs according to the row of the flat hoses. Therefore, the flow rate of the cooling water flowing in the flat hoses differs according to the position of the row of the flat hoses. In particular, the flow rate of the cooling water in the flat hoses arranged at a position close to the inlet pipe or the outlet pipe increases, so the flow rate difference of the cooling water increases between the flat hoses.
[0007] Thus, when the flow difference between the flat hoses is increased, the heat exchange performance of the radiator is reduced or the thermal stress generated by the flat hose is increased. However, in the technology described in the above-mentioned patent document 1, it is difficult to completely solve such problems, which may affect the performance or durability of the radiator.
[0008] The present invention is made to solve the above-mentioned technical problems, and its object is to provide a radiator which can reduce the thermal stress generated in the flat hoses by achieving uniformity of the flow rate in each flat hose, thereby improving durability and improving performance. [Technical solutions for solving technical problems]
[0009] In order to achieve the above-mentioned purpose, the radiator (1) of the present invention comprises: a core (5) on which a plurality of rows of flat hoses (2) are arranged along the depth direction; an inlet box (7) and an outlet box (8), which are arranged at both ends of the core (5) in a manner that the two ends of the flat hoses (2) are connected; an inlet pipe (10) connected to a side surface (9) in the depth direction of the inlet box (7); and an outlet pipe (12) connected to a side surface (11) in the depth direction of the outlet box (8) on the same side surface as the inlet pipe (10), characterized in that the outlet pipe (12) having an extension portion (15) extending from the one side surface (11) of the outlet box (8) toward the other side surface (14) of the outlet box (8) facing the one side surface (11) of the outlet box (8), the extension portion (15) being located at a position overlapping with an imaginary extension portion of the flat hose (2) that is closest to the one side surface (11) and being located within a range other than the position overlapping with the imaginary extension portion of the flat hose (2) that is closest to the other side surface (14).
[0010] The radiator (1) of the present invention may be such that, in the core portion (5) where more than four rows of flat hoses (2) are arranged in the depth direction, the top end (15a) of the extension portion (15) is located within a range (L2) from the central position in the depth direction of the flat hose (2) closest to the one side surface (11) of the outlet box (8) to the opening end on the other side surface (14) of the flat hose (2) which is the third closest to the one side surface (11) of the outlet box (8).
[0011] The radiator (1) of the present invention may be such that, in the core portion (5) in which three rows of flat hoses (2) are arranged along the depth direction, the top end (15a) of the extension portion (15) is located within a range (L2) from the central position in the depth direction of the flat hose (2) closest to the one side surface (11) of the outlet box (8) to the opening end on the other side surface (14) of the flat hose (2) which is second closest to the one side surface (11) of the outlet box (8).
[0012] In the radiator (1) involved in the above-mentioned present invention, the top end (15a) of the extension portion (15) can be located within a range (L1) from the central position in the depth direction of the flat hose (2) closest to the one side surface (11) of the outlet box (8) to the central position in the depth direction of the flat hose (2) second closest to the other side surface (14) of the outlet box (8).
[0013] In the above-mentioned radiator (1) according to the present invention, an opening (16) may be formed on the side of the extension portion (15) opposite to the flat hose (2). [Effects of the invention]
[0014] According to the present invention, by making the flow rate in each flat hose uniform, various effects can be achieved, such as reducing the thermal stress generated in the flat hose, improving the durability, and improving the performance of the radiator. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a front view showing a heat sink according to an embodiment of the present invention. Figure 2 It is a side view showing a heat sink according to an embodiment of the present invention. Figure 3 yes Figure 1 AA section view. Figure 4 It is a cross-sectional view showing an internal flow rate adjustment mechanism of a radiator according to an embodiment of the present invention. [Explanation of Reference Numerals] 1: Radiator; 2: Flat hose; 5: Core; 7: Inlet box; 8: Outlet box; 9: One side (of the inlet box); 10: Inlet pipe; 11: One side (of the outlet box); 12: Outlet pipe; 14: The other side (of the outlet box); 15: Extension (internal flow regulating mechanism); 15a: Top end; 16: Opening; L1: The range from the central position in the depth direction of the flat hose closest to one side of the outlet box to the central position in the depth direction of the flat hose that is second closest to the other side of the outlet box; L2: The range from the central position in the depth direction of the flat hose that is closest to one side of the outlet box to the opening end on the other side of the flat hose that is third closest to one side of the outlet box. DETAILED DESCRIPTION
[0016] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a front view showing a heat sink according to an embodiment of the present invention, Figure 2 is a side view showing a heat sink according to an embodiment of the present invention, Figure 3yes Figure 1 AA section view, Figure 4 It is a cross-sectional view showing an internal flow rate adjustment mechanism of a radiator according to an embodiment of the present invention.
[0017] In addition, Fr, Rr, L, R, U, and D shown in each of the drawings represent front, rear, left, right, top, and bottom, respectively. Terms representing directions or positions are used in this specification, but these terms are used for convenience of explanation and do not limit the technical scope of the present invention.
[0018] like Figure 1 and Figure 2 As clearly shown, a radiator (heat exchanger) 1 according to an embodiment of the present invention includes a core 5 having a plurality of flat hoses 2 , a plurality of fins 3 , and a pair of upper and lower header plates 4 .
[0019] In the core 5, four hose rows 6A, 6B, 6C, and 6D are arranged along the depth direction, which is the front-rear direction. The hose rows are formed by arranging a plurality of flat hoses 2 in the left-right width direction with heat sinks 3 interposed therebetween (see FIG. Figure 4 ). The flat hose 2 is formed into a cylindrical shape having a substantially elliptical cross-section that is elongated in the front-to-back direction. A plurality of flat hoses 2 and a plurality of heat sinks 3 are alternately arranged in the left-right width direction in a posture extending in the up-down direction. A plurality of hose insertion holes (not shown) are provided on each tube collector plate 4, and the edges of each hose insertion hole are subjected to a punching process. The upper and lower ends of each flat hose 2 are inserted into the hose insertion holes of a pair of tube collector plates 4. Here, in this specification and claims, it is defined as: "width direction" refers to Figure 1 The left and right directions in the “depth direction” refer to Figure 2 to Figure 4 The front-to-back direction.
[0020] like Figure 1 and Figure 2 As shown, at the upper and lower ends of the core 5, an inlet box 7 and an outlet box 8 are provided via a header plate 4, and hose rows 6A, 6B, 6C, and 6D (see Figure 4 ) share an inlet box 7 and an outlet box 8. When viewed from the front of a side surface 9 in the depth direction (the rear side surface in the figure), an inlet pipe 10 is connected to the left side of the inlet box 7. The inlet pipe 10 has a cylindrical shape and protrudes forward from a side surface 9 of the inlet box 7.
[0021] Apart from Figure 1 and Figure 2 In addition, Figure 3 and Figure 4As shown, when viewed from the front of one side surface 11 in the depth direction (the rear side surface in the figure), an outlet pipe 12 is connected to the right side of the outlet box 8. The outlet pipe 12 has an outer portion 13 and an extension portion 15. The outer portion 13 is cylindrical and protrudes forward from one side surface 11 of the outlet box 8. The extension portion 15 extends from the outer portion 13 to another side surface 14 (the front side surface in the figure) facing the one side surface 11 of the outlet box 8 inside the outlet box 8. The extension portion 15 acts as an internal flow regulating mechanism with a flow guiding function.
[0022] like Figure 4 As shown clearly, the extension 15 of the outlet pipe 12 is preferably formed so that its top end 15a is located within a range L1 from the center position in the depth direction of the flat hose 2 of the hose row 6A closest to the one side 11 (the rear side in the figure) of the outlet box 8 to the center position in the depth direction of the flat hose 2 of the hose row 6C second closest to the other side 14 (the front side in the figure). As a result, it is possible to avoid the flow concentration in the flat hose 2 first and second closest to the other side 14, and to suppress the flow of cooling water from increasing in the flat hose 2 arranged at a position close to the outlet pipe 12, thereby suppressing the flow difference of cooling water from increasing between the flat hoses 2.
[0023] Preferably, an opening 16 is formed at the lower portion of the extension portion 15 on the opposite side to the flat hose 2. The opening 16 is formed from the top end 15a side of the extension portion 15 ( Figure 3 and Figure 4 The opening 16 may be formed as a semicircular notch when viewed from the rear of the extension 15a. In addition, although not particularly shown in the figure, the opening 16 may be formed as a fan-shaped notch when viewed from the top 15a side, or may be formed by a plurality of through holes without forming a notch. In addition, the extension 15 may have a cylindrical shape without forming the opening 16 on its lower side.
[0024] like Figure 1 and Figure 2 As shown, in the radiator 1 having the above structure, the high-temperature cooling water heated by the engine is driven by a circulation pump (not shown) provided in the cooling circuit, and flows from the inlet pipe 10 through the inlet tank 7 into each hose array 6A, 6B, 6C, 6D (see Figure 4 ) in each flat hose 2. On the outer surface side of the flat hose 2, cooling air is circulated in the front-rear direction by a fan (not shown), and heat exchange is performed between the cooling air and the cooling water in the flat hose 2. Thereafter, the cooling water cooled by the heat exchange flows out from the outlet pipe 12 through the outlet box 8 and returns to the engine circulation.
[0025] Thus, when the cooling water flows through the flat hose 2 of the core 5 of the radiator 1, the first to third hose rows 6A to 6C (see FIG. Figure 4 ) and the flat hose 2 on the outlet pipe 12 side is arranged in a manner overlapping with the extension 15 in a plan view, so that the flow resistance of the cooling water flowing from these flat hoses 2 into the outlet box 8 becomes larger. As a result, the flow of the cooling water can be changed in a manner to avoid the flow of the cooling water being concentrated in these flat hoses 2 arranged near the outlet pipe 12, so that the flow of the cooling water in each flat hose 2 can be uniformed. Therefore, the thermal stress generated by the flat hose 2 near the outlet pipe 12 can be reduced, and the performance and durability of the radiator 1 can be improved.
[0026] In addition, in the cooling circuit in which the circulation pump is arranged on the upstream side of the radiator 1, the cooling water near the outlet pipe 12 flowing from the flat hose 2 into the outlet box 8 is pushed toward the extension 15, thereby increasing the flow resistance of the cooling water, thereby further improving the effect of the present invention described above. In this case, by reducing the gap between the lower end of the flat hose 2 and the upper end of the extension 15 of the outlet pipe 12, the effect of the present invention described above can be further improved.
[0027] Furthermore, in the cooling circuit in which the circulation pump is arranged at the downstream side of the radiator 1, the cooling water flowing from the flat hose 2 to the vicinity of the outlet pipe 12 of the outlet box 8 is guided to bypass the extension 15 and introduced into the outlet pipe 12. Therefore, it is not easily affected by the size of the gap between the lower end of the flat hose 2 and the upper end of the extension 15 of the outlet pipe 12, thereby increasing the degree of freedom in design of the protrusion amount of the flat hose 2 relative to the outlet box 8 or the arrangement of the extension 15 of the outlet pipe 12.
[0028] In addition, the top end 15a of the extension 15 of the outlet pipe 12 may also be formed as follows: Figure 4 As shown, the top end 15a of the extension portion 15 of the outlet pipe 12 is located within a range L2 from the center position in the depth direction of the flat hose 2 closest to the one side surface 11 of the outlet box 8 to the open end of the other side surface 14 of the flat hose 2 which is third closest to the one side surface 11 of the outlet box. Thus, in one to three flat hoses 2 close to the one side surface 11, the flow rate is suppressed, and the flow rate in each flat hose 2 is made uniform, so that the thermal stress generated in the flat hose 2 can be reduced, the durability can be improved, and the performance of the radiator can be improved.
[0029] Moreover, the extension portion 15 of the outlet pipe 12 can be formed to be located at a position overlapping with an imaginary extension portion of the flat hose 2 of the hose row 6A closest to one side 11 among the flat hoses 2, and to be located within a range other than the position overlapping with an imaginary extension portion of the flat hose 2 of the hose row 6D closest to the other side 14.
[0030] In addition, in the description of the above-mentioned embodiment of the present invention, a radiator 1 is described in which four rows of hose rows 6A, 6B, 6C, and 6D are arranged. However, the application of the present invention is not limited to such a radiator 1. For example, it can also be applied to a radiator in which three rows of hose rows are arranged, or a radiator in which five or more rows of hose rows are arranged.
[0031] Moreover, for example, in a radiator having three rows of hoses, the top end 15a of the extension portion 15 of the outlet pipe 12 may be located within a range L2 from the center of the flat hose 2 of the hose row closest to the one side surface 11 of the outlet box 8 to the open end of the flat hose 2 of the hose row second closest to the one side surface 11 of the outlet box 8 on the other side surface 14 side. In this case, the same effect as above can be obtained.
[0032] In addition, for example, in a radiator having five or more hose rows, the top end 15a of the extension portion 15 of the outlet pipe 12 may be located within a range L2 from the center of the flat hose 2 of the hose row closest to the one side 11 of the outlet tank 8 to the open end of the flat hose 2 of the hose row closest to the one side 11 on the other side 14. In this case, the same effect as above can be obtained.
[0033] In addition, the above description of the embodiment of the present invention shows one mode of the internal flow regulating mechanism of the radiator involved in the present invention, and the technical scope of the present invention is not limited to the above embodiment. The present invention can be variously changed, replaced, and deformed within the scope of the main purpose of the technical idea, and the scope of the technical solution can include all embodiments that can be included within the scope of the technical idea.
Claims
1. A radiator (1), comprising: a core (5) on which a plurality of rows of flat hoses (2) are arranged in a depth direction; an inlet box (7) and an outlet box (8), which are arranged at both ends of the core (5) in a manner that the two ends of the flat hoses (2) are connected; an inlet pipe (10) connected to a side surface (9) in the depth direction of the inlet box (7); and an outlet pipe (12) connected to a side surface (11) in the depth direction of the outlet box (8) on the same side surface as the inlet pipe (10), characterized in that: The outlet pipe (12) has an extension portion (15) extending from the one side surface (11) of the outlet box (8) toward the other side surface (14) of the outlet box (8) facing the one side surface (11) of the outlet box (8) in the interior of the outlet box (8), the extension portion (15) being located at a position overlapping with an imaginary extension portion of the flat hose (2) that is closest to the one side surface (11) and being located within a range excluding a position overlapping with an imaginary extension portion of the flat hose (2) that is closest to the other side surface (14).
2. The heat sink (1) according to claim 1, characterized in that: In the flat hose (2) arranged in more than four rows along the depth direction in the core (5), the top end (15a) of the extension portion (15) is located within a range (L2) from the central position in the depth direction of the flat hose (2) closest to the one side surface (11) of the outlet box (8) to the opening end on the other side surface (14) of the flat hose (2) which is the third closest to the one side surface (11) of the outlet box (8).
3. The radiator (1) according to claim 1, characterized in that: In the flat hose (2) arranged in three rows along the depth direction in the core (5), the top end (15a) of the extension portion (15) is located within a range (L2) from the central position in the depth direction of the flat hose (2) closest to the one side surface (11) of the outlet box (8) to the opening end on the other side surface (14) of the flat hose (2) which is second closest to the one side surface (11) of the outlet box (8).
4. The heat sink (1) according to claim 1, characterized in that: The top end (15a) of the extension portion (15) is located within a range (L1) from the center position in the depth direction of the flat hose (2) closest to the one side surface (11) of the outlet box (8) to the center position in the depth direction of the flat hose (2) second closest to the other side surface (14) of the outlet box (8).
5. The radiator (1) according to any one of claims 1 to 4, characterized in that: An opening (16) is formed on the side of the extension portion (15) opposite to the flat hose (2).