JP2005351208A - Water filling port structure of radiator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the influence of a dynamic pressure of a cooling water without increasing flow resistance of cooling water. <P>SOLUTION: Cooling water from the engine side flows in through an inlet pipe 7 and flows out to a header tank 5 of a radiator through a header tank connection pipe 9. Communication shaping of a neck filler 6 is made from the inlet pipe 7 in a perpendicular upper part, and the other end thereof is closed by a cap 8. A water filling port 12 is formed in the internal part of the neck filler 6, a baffle plate 13 is formed at a connection part between the water filling port and the inlet pipe 7 with the baffle plate 13 protruded by a given length in a manner to decrease the sectional area of the water filling port 12. The influence of flow of cooling water from the inlet pipe 7 in the direction of the water filling port 12 is relaxed by the baffle plate 13. Since the protruding direction of the baffle plate 13 is the same as the longitudinal direction of the inlet pipe 7, flow resistance of water through the inlet pipe is not increased. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a water inlet structure of a radiator.
About.

Conventionally, a biased fluid has been installed inside the radiator inlet tank to divert the flow of cooling water from the cooling water inlet pipe downward to avoid the dynamic pressure of the cooling water from acting on the pressure regulating valve. In some cases, leakage from the pressure regulating valve to the reserve tank is prevented (see, for example, Patent Document 1).
JP 11-324671 A

  However, in the above prior art, the eccentric fluid acts to increase the flow resistance against the flow of cooling water flowing from the cooling water inlet pipe, so the amount of cooling water flowing into the radiator is reduced and the cooling efficiency of the radiator is reduced. There was a problem of lowering.

  In view of the above points, an object of the present invention is to suppress the influence of the dynamic pressure of cooling water without increasing the flow resistance of the cooling water.

  In order to achieve the above object, according to the first aspect of the present invention, an inlet pipe (7) having an inlet through which cooling water from the engine is introduced at one end and extending in the horizontal direction to flow cooling water, and an inlet pipe at one end. The neck filler (6) is provided in the vertical direction so as to communicate with the neck, the overflow pipe (10) is formed in the horizontal direction, and the other end is provided with an opening for injecting cooling water, and the opening of the neck filler is blocked. A cap (8) containing a pressure regulating valve (80) and a connection pipe (9) connected to the header tank (5) of the radiator in the vertical direction at the other end of the inlet pipe, A baffle plate (13, 13a, 13b) having a predetermined length is formed at the communicating end so as to reduce the area of the water inlet in the radial direction on the inner periphery of the water inlet. And it features.

  According to this, a baffle plate having a predetermined length is formed in the horizontal connection direction, that is, the longitudinal direction of the entrance pipe, at the communication connection portion between the entrance pipe and the neck filler. Since the influence of the cooling water flow toward the water injection port is reduced, the influence of the dynamic pressure due to the cooling water flow to the cap can be reduced. At this time, the baffle plate formed in the horizontal direction does not increase the flow resistance of the cooling water flow in the horizontal direction in the inlet pipe.

  The baffle plate can be provided on the entire inner periphery of the water injection port as described in claim 2, and a part of the inner periphery of the water injection port as described in claim 3. And it is also possible to provide in the downstream side wall of the inlet pipe in the flow direction of the cooling water.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  Hereinafter, an embodiment in which a water inlet structure according to the present invention is applied to a vehicle radiator will be described with reference to the drawings. FIG. 1 is a front view of a radiator 1 provided with a water inlet structure according to the present embodiment as viewed from the downstream side (engine side) of the air flow.

  In FIG. 1, a plurality of tubes 2 are flat tubes through which engine coolant flows, and fins 3 are joined to the flat surfaces of the tubes 2 to form a wave shape and increase a heat transfer area with air. The tube 2 and the fin 3 constitute a heat exchange core portion 4.

  Further, header tanks 5 extending in a direction orthogonal to the longitudinal direction of the tube 2 and communicating with each tube 2 are provided on both ends in the longitudinal direction of the tube 2 (upper and lower in FIG. 1). The high-temperature engine coolant that has flowed from the engine (not shown) into the header tank 5 above the inlet pipe 7 is distributed and supplied to each tube 2 from the upper header tank 5 to the header tank 5 below. Then, the engine cooling water cooled after the heat exchange with the air is recovered from each tube 2 and returned to the engine.

  2 is a cross-sectional view of the inlet pipe 7, neck filler 6 and cap 8 taken along the line AA in FIG. FIG. 3 is a top view of the water injection port 12 to which the cap 8 is not attached. In the drawing, the flow direction of the cooling water in the inlet pipe 7 is indicated by arrows FL, FL1 to FL6.

  The inlet pipe 7 is formed to extend in the horizontal direction, and a pipe (not shown) is connected to the opening on one end side so that cooling water from the engine side flows. The other end side of the inlet pipe 7 is bent by approximately 90 ° in the vertical direction, and an opening communicating with the upper header tank 5 is formed. A neck filler 6 is connected to the pipe wall of the entrance pipe 7 extending in the horizontal direction.

  A cylindrical water inlet 12 having a predetermined diameter is formed in the neck filler 6. A baffle plate 13 that reduces the cross-sectional area of the water injection port 12 is formed at the connection portion between the neck filler 6 and the inlet pipe 7. As shown in FIG. 3, the baffle plate 13 has a protruding length of a predetermined length d (for example, d = 2 mm) from the inner wall of the water inlet 12 over the entire circumference. The baffle plate 13 can reduce the area of the water inlet 12 by π × d × d (square millimeter).

  The cap 8 includes a pressurizing valve 81 that opens when the pressure in the header tank 5 becomes a predetermined value or more, a negative pressure valve 82 that opens when the pressure in the header tank 5 becomes negative, and the inside of the neck filler 6. A sealing valve 83 or the like for closing the formed water injection port 12 is provided.

  On the other hand, the neck filler 6 is formed with a ring-shaped (annular) pressurizing valve seal portion 61 that contacts the pressurizing valve 81 and a ring-shaped (annular) seal valve seal portion 62 that contacts the seal valve 83. FIG. 2 shows that the internal pressure of the header tank 5 is in a negative pressure state, the pressurization valve 81 is in a closed state, and the negative pressure valve 82 is in an open state.

  The neck filler 6 is formed so that the overflow pipe 10 and the reinforcing rib 11 protrude in the opposite direction in the horizontal direction. The overflow pipe 10 is connected to a rubber pipe so that the header tank 5 and a reservoir tank (not shown) for storing cooling water can communicate with each other. The reinforcing rib 11 is for preventing the neck filler 6 from being deformed when the cap 8 is attached to and detached from the neck filler 6.

  Next, the operation of the baffle plate 13 in this embodiment will be described. Cooling water from the engine side flows in the inlet pipe 7 as indicated by arrows FL1 to FL4 in FIG. However, a turbulent flow is generally formed in the inlet pipe 7, and the flow from the streamlines FL 1 and FL 2 in the vicinity thereof to the connection portion, ie, the water inlet 12, flows vertically upward at the connection portion with the neck filler 6. FL4 to FL6 are derived.

  These vertically upward flows FL4 to FL6 toward the water injection port 12 apply dynamic pressure to the pressure regulating valve 80 of the cap 8. Therefore, if this flow component is large, even if the pressure (static pressure) in the header tank 5 is low, the fluctuation component (dynamic pressure) may increase and exceed the set pressure of the pressurizing valve 81. This causes a problem that the amount of overflow of the cooling water increases.

  In the present embodiment, the baffle plate 13 is formed so as to protrude by a predetermined length d in the streamline direction in the inlet pipe 7, that is, in the longitudinal direction of the inlet pipe 7, so as to reduce the cross-sectional area of the water inlet 12. Therefore, the flow of the cooling water toward the water injection port 12 (vertically upward) is relaxed by the baffle plate 13, and the influence of the dynamic pressure on the pressure regulating valve 80 due to this can be reduced.

  Moreover, since the protruding direction of the baffle plate 13 is made to coincide with the longitudinal direction of the inlet pipe 7, the flow resistance of the cooling water flowing in the inlet pipe 7 toward the header tank connecting pipe 9 is not increased. Moreover, since the opening is formed in the baffle plate 13, the water injection of the cooling water is not impaired.

  FIG. 4 is a cross-sectional view showing the mold structures 101 to 106 when the inlet pipe 7 and the neck filler 6 are molded. Since the surface of the baffle plate 13 on the side of the inlet pipe 7 has the same shape as the inner wall surface of the inlet pipe 7, the mold 105 for molding the inlet pipe 7 is moved in the longitudinal direction of the inlet pipe 7, The baffle plate 13 can be molded by moving the mold 101 upward, and can be molded without requiring a complicated mold structure.

  In addition, although the example which formed the baffle plate 13 so that it might protrude over the perimeter of the inner periphery of the water injection port 12 was shown in the said embodiment, it does not need to provide not only in this but in a perimeter. That is, for example, the baffle plate 13 may be provided only in the half circumference portion.

  In this case, in consideration of the flow state of the cooling water in the inlet pipe 7, it is desirable to make a half circumference including a portion where a flow component upward in the vertical direction is more likely to occur. For example, when the cooling water flow is likely to occur vertically upward on the downstream side of the cooling water flow at the water injection port 12, a half-circular baffle plate 13a may be formed in the downstream portion as shown in FIG. . Alternatively, in the case where a cooling water flow upward in the vertical direction is likely to occur on the upstream side of the cooling water flow at the water inlet 12, a half-circular baffle plate 13 b may be formed in the upstream portion as shown in FIG. 6. .

It is the front view which looked at the radiator of an embodiment from the air flow downstream (engine side). It is AA sectional drawing in FIG. It is a top view of a water inlet part. It is sectional drawing which shows the type | mold structure at the time of shaping | molding. It is a top view which shows other embodiment. It is a top view which shows other embodiment.

Explanation of symbols

1 ... Radiator, 2 ... Tube, 3 ... Fin, 6 ... Neck filler, 7 ... Inlet pipe,
8 ... Cap, 9 ... Header tank connection pipe, 10 ... Overflow pipe,
12 ... Water inlet, 13 ... Baffle plate.

Claims (3)

An inlet pipe (7) having an inlet through which cooling water from the engine is introduced at one end and extending in the horizontal direction to flow the cooling water;
A neck filler (6) provided with a vertical direction so that one end communicates with the inlet pipe, an overflow pipe (10) formed in the horizontal direction, and an opening for injecting cooling water at the other end;
A cap (8) with a built-in pressure regulating valve (80) that closes the opening of the neck filler;
A connection pipe (9) connected to the header tank (5) of the radiator in the vertical direction at the other end of the inlet pipe;
A baffle plate (13, 13a, 13b) having a predetermined length is formed at the communicating end of the neck filler with the inlet pipe so as to reduce the area of the water inlet in the radial direction on the inner periphery of the water inlet. The water inlet structure of the radiator is characterized by The radiator water inlet structure according to claim 1, wherein the baffle plate is provided on the entire inner periphery of the water inlet. 2. The water inlet of a radiator according to claim 1, wherein the baffle plate is a part of an inner periphery of the water inlet and is provided on a downstream side wall in a flow direction of the cooling water in the inlet pipe. 3. Construction.

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