JPH0776529B2 - Car radiator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator for an automobile, and more particularly to the shape of a water injection port. In a conventional automobile radiator, a cylindrical member is connected to a water inlet provided in an upper tank of the radiator as disclosed in Japanese Patent Laid-Open No. 55-41391. Then, a radiator cap having a negative pressure valve and a pressure valve is fitted to the cylindrical member. Further, a connection pipe communicating with the reserve tank is connected to the side wall of the cylindrical member. In this automobile radiator, when the pressure in the upper tank exceeds a predetermined value, the pressurizing valve of the radiator cap is opened, and by opening this pressurizing valve, the superheated steam in the upper tank is pressurized. And is returned to the reserve tank through the connecting pipe. However, the above-described automobile radiator has the following problems. That is, when the pressurizing valve is opened, the superheated steam in the upper tank is ejected from the circular seating surface of the pressurizing valve in all directions. The flow of this superheated steam becomes a swirl flow having all flow direction components inside the cylindrical member. However, the connecting pipe only opens at one place on one side surface of the cylindrical member, and the superheated steam swirling with any flow direction component inside the cylindrical member smoothly moves from the connecting pipe to the reserve tank. It is difficult to recirculate. As a result, the swirl flow inside the cylindrical member cannot fully escape and the pressure inside the cylindrical member rises,
Consequently, there is a problem that the set valve opening pressure of the pressurizing valve is greatly affected. In view of the above problems, in the present invention, when the pressurizing valve is opened and the superheated steam is ejected from the water injection port, the superheated steam smoothly flows from the connecting pipe to the reserve tank. The purpose is to make it flow to. Then, the following technical means were used to achieve this purpose. That is, the tubular member connected to the water inlet is composed of an inner tubular pipe and an outer tubular pipe, and a fluid passage is formed between the inner tubular pipe and the outer tubular pipe. The outer tube is provided with a connecting pipe having one end opened to the fluid passage and the other end opened to the reserve tank. Then, the lower end of the inner wall of the connecting pipe is set at a position which does not exceed the sealing end of the inner cylindrical pipe, and the lower end surface of the inner lid of the cap fitted to the outer cylindrical pipe is set to the sealing end of the inner cylindrical pipe. Was set to a position where it would not cross downward. The superheated steam and air jetted out by opening the pressurizing valve flow through the fluid passage, and the flow is rectified toward the connecting pipe. Then, after being rectified, it flows out from the connection pipe to the reserve tank. Since the lower end of the inner wall of the connecting pipe is set at a position where it does not exceed the sealing end of the inner tubular pipe upward, the steam and air flowing into the fluid passage flow into the connecting pipe as they are without rising again. Further, since the lower end surface of the inner lid of the cap is set at a position where it does not go over the sealing end of the inner tube downward, steam and air that have passed over the sealing end are not disturbed by the inner lid of the cap and enter the fluid passage. Pour in. As described above, in the automobile radiator of the present invention, the superheated steam ejected by pushing and opening the pressurizing valve is rectified by flowing through the fluid passage, and at this time, the flow direction is changed to the connecting pipe. It is unified towards the reservoir and can smoothly flow into the reserve tank through the connecting pipe.
As a result, the superheated steam can be satisfactorily sent to the reserve tank side without increasing the pressure inside the inner cylinder pipe and the outer cylinder pipe, and the valve opening pressure of the pressurizing valve can be maintained at an appropriate value. Embodiments of the present invention will now be described with reference to the drawings. FIG. 5 is a front view showing an automobile radiator 500 of this embodiment. In the upper tank 10 molded from resin,
A cooling water inlet port 14 is formed to receive the high temperature cooling water from a vehicle running engine (not shown). The cooling water inlet 14 has an inner diameter of a certain value or more depending on the joining condition with the pipe extending from the engine. A water injection port 16 for supplying cooling water is opened on the upper surface of the upper tank 10, and a cap 200 is connected to the water injection port 16. A mounting bracket 18 is formed at the upper end of the upper tank 10, and the entire vehicle radiator 500 is fixed to the fixing portion by the mounting bracket 18. One end of a plurality of tubes 30 is connected to the upper tank 10, and a lower tank 20 made of resin is connected to the other end of the tubes 30. Corrugated fins 32 are joined between the plurality of tubes 30, respectively. Further, the lower tank 20 is provided with a cooling water outlet 21 through which the cooling water that has passed through the tube 30 from the upper tank 10 and has flowed into the lower tank 20 flows out again toward the engine. Note that 41, 42
It shows a caulking plate. A cylindrical outer cylinder tube and an inner cylinder tube having a double tube structure are connected to the water injection port 16, and a cap 200 is fitted to the outer cylinder tube. Also,
The outer pipe has a connecting pipe 111 connected to the reserve tank.
Is provided. Next, the structure of the water injection port will be described. 1 is a view showing a II cross section in FIG. 5, and FIG. 2 is a view showing a state when the cap 200 is removed from the one shown in FIG. The foot portion 11 of the upper tank 10 having a semicircular cross section is fitted into the groove portion of the core plate 43 via the O-ring 44. And this core plate 4
3 and foot 11 are crimped so that plate 4
1, the upper tank 10 and the core plate 43 are connected to each other. A plurality of tubes 30 are connected to the core plate 43 by means such as brazing. A water injection port 16 for replenishing cooling water is opened on the upper surface of the upper tank 10. This water inlet 16
One end of a cylindrical inner tube 101 having a cylindrical shape is connected around, and the inner tube 101 effectively forms a water injection port 16 inside thereof. The inner cylinder pipe 101 extends upward from the water injection port 16, and the other end forms an inner cylinder seal end 105. One end of an outer cylindrical tube 103 having a cylindrical shape is connected to the outer peripheral wall of the inner cylindrical tube 101 at a substantially intermediate position. The outer tube 103 also extends upward coaxially with the inner tube 101, and the other end forms an outer tube seal end 107. Further, the flange portion 109 is provided at the other end.
An outer lid 201 of a cap 200, which will be described later, is fitted on the flange portion 109. The inner diameter of the outer tube 103 is larger than the outer diameter of the inner tube 101 by a predetermined amount. In this embodiment, the inner tube 103 has an inner diameter of 31 mm and the inner tube 101 has an outer diameter of 24 mm.
I am trying. Therefore, the outer peripheral wall of the inner cylindrical tube 101 and the outer cylindrical tube 10
An annular passage 117 having a width of 3.5 mm is formed by the inner peripheral wall of No. 3. In addition, the Uchizu seal end 105 of the inner tubular pipe 101
The outer cylinder seal end 107 of the outer cylinder tube 103 is formed at a higher position than that. A connecting pipe 111 communicating with a reserve tank (not shown) is connected to the outer tube 103, and one end of the connecting pipe 111 is open at a position facing the annular passage 117. In the present embodiment, the opening upper edge 111a of the connecting pipe 111 is located at the same height as the seal end surface of the inner cylinder seal end 105, and the opening lower edge 111b is located below the seal end surface and is tubular. It is located slightly higher than the bottom surface of the passage 117. The cap 200 includes an outer lid 201 and an inner lid 203.
The seal packing 205 is sandwiched between and. When the outer lid 201 is fitted to the flange portion 109, the seal packing 205 abuts the outer cylinder seal end 107 to keep the seal. A pressurizing valve seal packing 209 is joined to the pressurizing valve main body 207, and the pressurizing valve seal packing 209 is in contact with the inner cylinder seal end 105. The pressurizing valve main body 207 and the pressurizing valve seal packing 209 constitute a pressurizing valve. A spring 215 is provided between the pressurizing valve body 207 and the inner lid 203.
Are arranged, and the pressurizing valve seal packing 209 is pressed against the inner cylinder seal end 105 by the spring 215. Further, a negative pressure valve main body 211 is arranged in the pressurizing valve main body 207, and a negative pressure valve seal packing 213 is joined to the negative pressure valve main body 211. In the state shown in FIG. 1, the negative pressure valve seal packing 213 is in contact with the pressurization valve main body 207. However, when the inside of the upper tank 10 is at atmospheric pressure or lower, the negative pressure valve seal packing 213 and the negative pressure valve seal packing 213 are added. It is separated from the pressure valve main body 207, and the upper tank 10 and the upper space of the pressurization valve main body 207 are communicated with each other via a passage 217. FIG. 3 is a view showing a III-III cross section of FIG. As can be seen from this figure, one end of the connecting pipe 111 is at a position facing the tubular passage 117 and is open in the longitudinal direction of the upper tank 10. Since the cooling water inlet port 14 has an inner diameter larger than the height of the upper tank 10, the upper portion of the cooling water inlet port 14 and the inner cylindrical pipe 10 will be described.
The inside of 1 is communicated with an air vent passage 115, and the air accumulated above the cooling water inlet 14 is vented to the inside of the inner cylindrical pipe 101 from the air vent passage 115. The air vent passage 115 has a semicircular cross section, is formed in the upper portion of the upper tank 10, and the air vent passage 115 and the inside of the upper tank 10 communicate with each other. The lower end surface 203a of the inner lid 203 is located above the sealing end 105 of the inner cylindrical tube 101. A support piece 113 that supports the connecting pipe 111 is formed between the connecting pipe 111 and the upper tank 10 from the root of the connecting pipe 111 to a substantially intermediate position. FIG. 4 is a sectional view taken along line IV-IV in FIG. As can be seen from this figure, the inner tube 101 and the outer tube 1
03 has a double pipe structure, and the inner cylindrical pipe 10
An annular passage 117 is formed between 1 and the outer tube 103. Further, a connecting pipe 111 is connected at a position facing the annular passage 117. Further, the air vent passage 115 is formed at a position opposed to the connecting pipe 111 by 180 °, and the annular passage 117 has a substantially C-shaped vertical cross section. Next, the operation of this embodiment will be described.
When the pressure in the upper tank 10 rises above a predetermined value, the pressure valve seal packing 209 separates from the inner cylinder seal end 105 against the biasing force of the spring 215 in response to this pressure rise. As a result, the superheated steam in the upper tank 10 flows into the annular passage 117 through between the inner cylinder seal end 105 and the pressurizing valve seal packing 209. When the superheated steam flows into the annular passage 117, the flow direction of the superheated steam having a random flow direction is unified along the annular passage 117. That is, the superheated steam passes through the annular passage 117 as shown by the arrow F in FIG.
11 and flows out to the reserve tank through the connecting pipe 111 that opens toward the annular passage 117.
Here, it is particularly important to note that the superheated steam flows in the annular passage 117 so that the flow direction is unified toward the connecting pipe 111 and the connecting pipe 11 smoothly.
It means that it can flow from 1 to the reserve tank. Further, when the pressure in the upper tank 10 becomes equal to or lower than the atmospheric pressure, the negative pressure valve seal packing 213 is separated from the pressurizing valve main body 207, and the inside of the upper tank 10 becomes the passage 2.
The cooling water in the reserve tank communicates with the upper space of the pressurizing valve main body 207 via the connecting pipe 111 and the passage 2.
It will flow into the upper tank 10 via 17. When the cooling water is replenished from the water injection port 16, the air accumulated in the upper part of the cooling water introduction port 14 is evacuated into the inner cylindrical pipe 101 through the air bleeding passage 115. Next, a second embodiment of the present invention will be described. In the above-described first embodiment, the fluid passage is formed along substantially the entire circumference of the inner cylindrical pipe 101. That is, the fluid passage was the C-shaped annular passage 117. In this embodiment, as shown in FIG.
3 is connected in the vicinity of the front end opening of the inner cylindrical pipe 101. As shown in FIGS. 7 to 10, the fluid passage formed by the inner wall of the outer tube 103 and the outer wall of the inner tube 101 is formed only in the vicinity of one open end of the connecting pipe 111. Also in this embodiment, the superheated steam in the upper tank 10 has an inner cylinder seal end 105 when the pressurizing valve is opened.
And then flows into the fluid passage 117, the flow is rectified, and smoothly flows out of the reserve tank through the connection pipe 111. The other construction and operation of this embodiment are exactly the same as those of the first embodiment described above, and the same components are designated by the same reference numerals.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a first embodiment of the present invention, which is taken along the line I- of FIG.
I sectional view. FIG. 2 is a cross-sectional view showing a state in which the cap is removed from the state shown in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 is a front view showing a vehicle radiator according to the first embodiment of the present invention. 6 is a cross-sectional view showing a second embodiment of the present invention, which is taken along line V of FIG.
Sectional drawing of I-VI. 7 is a cross-sectional view showing a state in which the cap is removed from the state shown in FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 9 is a sectional view taken along line IX-IV of FIG. FIG. 10 is a front view showing an automatic radiator of a second embodiment of the present invention. [Explanation of Codes] 10 Upper Tank 16 Water Injection Port 20 Lower Tank 30 Tube 101 Inner Tube 103 Outer Tube 105 Inner Tube Seal End 107 Outer Tube Seal End 111 Connecting Pipe 117 Fluid Passage 200 Cap 209 Sealing Packing for Pressurizing Valve

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Seiichi Kato             Nihonden, 1-1, Showa-cho, Kariya city, Aichi prefecture             Sozo Co., Ltd. (72) Inventor Satomi Muto             Nihonden, 1-1, Showa-cho, Kariya city, Aichi prefecture             Sozo Co., Ltd.              (56) Bibliography Shou 56-131068 (JP, U)               Actual Development Sho 61-37423 (JP, U)               Actual Development Sho 60-14227 (JP, U)

Claims (1)

Claims: (a) an upper tank that receives a cooling fluid from an internal combustion engine; (b) a tube whose one end is connected to the upper tank and through which the cooling fluid in the upper tank passes. c) a lower tank that is connected to the other end of the tube and receives the cooling fluid that has passed through the inside of the tube, and (d) is formed on a side surface of the upper tank, and introduces the cooling fluid into the upper tank. (E) One end opens to the inside of the upper tank, the other end opens upward, the other end constitutes a seal end, and a water injection port is formed inside the cooling water introduction port. And (d) having an inner diameter larger than the outer diameter of the inner tube, having one end connected to the outer peripheral wall of the inner tube and the other end having the seal of the inner tube. A tubular outer tube that opens upward from the end, (f) A fluid passage formed between the inner cylinder pipe and the outer cylinder pipe and having a bottom portion located below a seal end of the inner cylinder; and (g) between the cooling water introduction port and the water injection port. (H) an outer lid that engages with the other end of the outer tube, an inner lid that is inside the outer lid and is connected to the outer lid, and the inner lid A pressurizing valve main body having a seal portion at a position opposite to the inner lid and engaged, and the seal portion of the pressurizing valve main body 207 is seated on the seal end of the inner tubular pipe, and A cap that operates to open the sealed end of the inner tube when the pressure in the tank reaches a predetermined value or higher; (i) is connected to the outer tube and opens to the fluid passage;
And a connecting pipe having the other end opened toward a reserve tank for storing a cooling fluid, and (j) the lower end of the inner wall of the connecting pipe is set at a position not exceeding the sealing end of the inner tubular pipe upward. And a lower end surface of the inner lid of the cap is set at a position which does not extend downward beyond the seal end.