JP2005147018A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a radiator fan and a radiator from interfering with each other. <P>SOLUTION: An air blower stay 4a is arranged between an air blower 3 (radiator fan 3a) and the radiator 2, and an annular interference prevention ring 4b is provided at a portion of the air blower stay 4a corresponding to a tip side of blades 3d. Accordingly, even if the blades 3d are bent to the radiator 2 side, direct interference (collision) of the blades 3d with the radiator 2 can be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat exchanger including a heat exchanger and a blower for blowing air to the heat exchanger, and is effective when applied to a vehicle cooling device such as a vehicle radiator device.

  In recent years, in order to expand the interior of a vehicle while suppressing an increase in the size of the vehicle, each device mounted in the vehicle engine room has come close to the radiator and a blower (radiator fan) that blows cooling air to the radiator. The interval is getting smaller.

  By the way, the radiator fan is generally an axial fan that blows air in the direction of the rotation axis by rotating a plurality of radially provided blades. For example, the radiator fan is downstream of the radiator air flow. When the radiator fan and the radiator are submerged in the state where the radiator fan is submerged, excessive pressure is applied to the blade, the blade may bend toward the radiator, and the blade may collide with the radiator.

  Also, when the radiator fan rotates, it rotates between the air blowing direction of the blade surface (hereinafter referred to as the pressure surface) and the opposite surface (negative pressure surface). Since a pressure difference that fluctuates periodically is generated due to the number, the shape of the blade, and the like, an excitation force accompanying the pressure difference acts on the blade.

  Definitions of terms such as suction surface, pressure surface, and leading edge are in accordance with fluid engineering (Tokyo University Press).

  For this reason, when the natural frequency of the blade and the period of the excitation force due to the pressure difference coincide, the blade resonates greatly, and the blade may collide with the core portion of the radiator.

  When the blade collides with the core portion of the radiator, the blade is stuck in the radiator tube, the radiator tube is damaged, the radiator fan is locked, and the motor that drives the radiator fan (axial fan) There is a risk of burning.

Therefore, conventionally, the projection length when projecting the portion from the closest part of the blade suction surface closest to the core surface of the radiator core to the front edge of the blade on the core surface is longer than the dimension between the tubes. Thus, even if the blade collides with the radiator, the tip end side of the blade is prevented from being stuck into the tube (for example, see Patent Document 1).
JP 2002-250229 A

  However, the invention described in Patent Document 1 is not an invention that prevents the blade from colliding with the radiator, although it is possible to prevent the radiator fan from locking due to the tip of the blade being stuck into the tube. Cannot interfere with the radiator.

  In view of the above points, the present invention firstly provides a novel heat exchange device different from the conventional one, and secondly, prevents the fan of the blower and the heat exchanger from interfering with each other. For the purpose.

  In order to achieve the above object, according to the present invention, in the invention according to claim 1, the heat exchanger (2), the fan (3a) composed of a plurality of blades (3d), and the fan (3a) are rotated. A heat exchanger (3b) having a motor (3b) and a fan (3) for blowing heat exchange air to the heat exchanger (2), a fan stay (4a) for supporting the fan (3), It is arranged between the fan (3a) and the heat exchanger (2).

  Thereby, even if the blade (3d) is bent toward the heat exchanger (2), it can be prevented that the blade (3d) and the radiator 2 directly interfere (collision).

  In the invention described in claim 2, the blower (3) is arranged on the downstream side of the air flow from the heat exchanger (2).

  In the invention according to claim 3, the fan (3a) is an axial fan (3a) in which a plurality of blades (3d) are arranged radially at the rotation center, and further, a fan (3 The 3) side is fixed to the motor (3b).

  In the invention according to claim 4, the blower stay (4a) is constituted by a plurality of beam-like members extending substantially radially from the motor (3b), and further, the blade (3d) of the blower stay (4a). An annular interference prevention ring (4b) for preventing the blade (3d) from directly interfering with the heat exchanger (2) is provided at a portion corresponding to the tip end side of.

  Thereby, even if it is a site | part in which the fan stay (4a) is not arrange | positioned, it can prevent reliably that a braid | blade (3d) interferes (collides) directly with a heat exchanger (2).

  Further, since the base side of the blade (3d) has a smaller amount of bending than the tip side, the blade (3d) is hardly bent and the base side of the blade (3d) hardly interferes with the heat exchanger (2).

  Therefore, as in the present invention, if the interference prevention ring (4b) is provided only at the portion corresponding to the tip side of the blade (3d), the interference prevention ring (4b) can effectively effectively block the air passage. Interference between the blade (3d) and the heat exchanger (2) can be prevented in advance.

  The invention according to claim 5 is characterized in that the fan (3a) side of the interference prevention ring (4b) protrudes to the fan (3a) side from the blower stay (4a).

  This can further prevent the blade 3d from directly interfering (collision) with the heat exchanger (2).

  Incidentally, the reference numerals in parentheses of each means described above are an example showing the correspondence with the specific means described in the embodiments described later.

  In the present embodiment, the heat exchanger apparatus according to the present invention is applied to a vehicle radiator apparatus, and FIG. 1 is a view showing the characteristics of the heat exchanger apparatus according to the present embodiment, that is, the vehicle radiator apparatus 1. FIG. 2 is a view of the vehicle radiator device 1 as viewed from the downstream side of the cooling air flow.

  In FIG. 1, a radiator 2 exchanges heat between cooling water and air for cooling an internal combustion engine (engine) that forms a driving source for driving, or an electric motor for driving and an inverter circuit that supplies a driving current to the electric motor. It is a radiator that dissipates waste heat collected by cooling water into the air.

  The radiator 2 includes a radiator core composed of a plurality of flat tubes through which cooling water flows, fins that are joined to the outer surface of the tubes to promote heat exchange between air and cooling water, and longitudinal ends of the tubes. It has a header tank that extends in a direction perpendicular to the longitudinal direction of the tube and communicates with a plurality of tubes.

  Incidentally, in this embodiment, the longitudinal direction of the tube is made to coincide with the vertical direction, and the longitudinal direction of the header tank is made to coincide with the horizontal direction, but the present invention is not limited to this, and the longitudinal direction of the tube It goes without saying that the direction may coincide with the horizontal direction and the longitudinal direction of the header tank may coincide with the vertical direction.

  Further, a blower 3 for blowing cooling air to the radiator 2 is disposed on the upstream side of the cooling air flow of the radiator 2, and this blower 3 is an axial fan 3a and an electric motor that rotationally drives the axial fan 3a. The motor 3b and the like.

  Here, the axial fan 3a is composed of a boss portion 3c fixed to the rotating shaft of the motor 3b, that is, a plurality of blades 3d extending radially from the center of rotation, and is defined by JIS B 0132 number 1012. As shown, it is a fan through which gas (air) passes in the axial direction.

  Incidentally, the axial fan 3a according to the present embodiment is one in which the boss portion 3c and the blade 3d are integrally formed of resin. However, the present embodiment is not limited to this, and for example, presses a metal plate. You may form and integrally mold.

  The fan shroud 4 is a covering member that forms a pipe (duct) -like air passage from the blower 3 (axial fan 3 a) to the radiator 2 so as to cover the outer peripheral side of the blower 3, and the inner wall of the fan shroud 4 Are provided with a plurality of blower stays 4a forming beam members for holding (supporting) the blower 3 in the fan shroud 4.

  The blower stay 4a has one end fixed to the motor 3b and extending radially, and the other end fixed to the inner wall of the fan shroud 4, and the motor 3b is interposed between the axial fan 3a and the radiator 2. The blower 3 is supported so as to be positioned. For this reason, in this embodiment, the air blower stay 4a is located between the air blower 3, that is, between the axial fan 3a and the radiator 2.

  An annular interference prevention ring 4b is provided at a portion of the blower stay 4a corresponding to the tip side of the blade 3d, and the axial fan 3a side of the interference prevention ring 4b extends over the entire circumference. It protrudes to the axial fan 3a side from the blower stay 4a.

  In the present embodiment, the fan shroud 4, the blower stay 4a, and the interference prevention ring 4b are integrally formed of resin, but the present embodiment is not limited to this.

  Next, the function and effect of the vehicle radiator device 1 according to the present embodiment will be described.

  In this embodiment, since the fan stay 4a is disposed between the fan 3 (axial fan 3a) and the radiator 2, even if the blade 3d is bent toward the radiator 2, the blade 3d and the radiator 2 are Direct interference (collision) can be prevented.

  Furthermore, in the present embodiment, since the annular interference prevention ring 4b is provided at a portion corresponding to the tip side of the blade 3d in the blower stay 4a, even if the blower stay 4a is not disposed, the blade 3d. Can be reliably prevented from interfering (collision) with the radiator 2 directly.

  Incidentally, since the base side of the blade 3d has a smaller amount of bending than the tip side, the blade 3d is hardly bent and the base side of the blade 3d hardly interferes with the radiator 2.

  Therefore, if the interference prevention ring 4b is provided only at the portion corresponding to the tip side of the blade 3d as in the present embodiment, the blade 3d and the radiator 2 can be effectively used without greatly blocking the air passage by the interference prevention ring 4b. Can be prevented in advance.

  Further, the axial fan 3a side of the interference prevention ring 4b protrudes more toward the axial fan 3a side than the blower stay 4a, so that the blade 3d directly interferes (collises) with the radiator 2. Can be prevented.

(Other embodiments)
In the above-described embodiment, the heat exchanger device according to the present invention is applied to the vehicle radiator device, but the application of the present invention is not limited to this.

  Moreover, although the air blower 3 was arrange | positioned in the above-mentioned embodiment at the air flow downstream of the radiator 2 (heat exchanger), this invention is not limited to this.

  Moreover, in the above-described embodiment, the blower 3 having an axial fan is employed, but the present invention is not limited to this.

  Further, in the above-described embodiment, the axial flow fan 3a side of the interference prevention ring 4b protrudes from the blower stay 4a toward the axial flow fan 3a over the entire circumference, but the present invention is limited to this. For example, the convex portions may be scattered every predetermined circumferential angle.

  In the above-described embodiment, an electric motor is used as the motor 3b. However, the present invention is not limited to this, and may be another motor such as a hydraulic motor.

  Further, the present invention is not limited to the above-described embodiment as long as it matches the gist of the invention described in the claims.

It is a figure showing the feature of radiator device 1 for vehicles concerning an embodiment of the present invention. It is the figure which looked at the radiator device for vehicles 1 concerning the embodiment of the present invention from the cooling air flow downstream.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Radiator apparatus for vehicles, 2 ... Radiator, 3 ... Blower, 3a ... Axial fan,
3b ... motor, 3c ... boss, 3d ... blade, 4 ... fan shroud,
4a ... Blower stay, 4b ... Interference prevention ring.

Claims (5)

A heat exchanger (2);
A blower (3) having a fan (3a) composed of a plurality of blades (3d) and a motor (3b) for rotating the fan (3a) and blowing air for heat exchange to the heat exchanger (2) In a heat exchange device comprising:
A heat exchange apparatus, wherein a fan stay (4a) supporting the fan (3) is disposed between the fan (3a) and the heat exchanger (2). The heat exchanger according to claim 1, wherein the blower (3) is arranged on the downstream side of the air flow from the heat exchanger (2). The fan (3a) is an axial fan (3a) in which the plurality of blades (3d) are arranged radially at the rotation center,
Furthermore, the said fan (3) side of the said fan stay (4a) is being fixed to the said motor (3b), The heat exchange apparatus of Claim 1 or 2 characterized by the above-mentioned. The blower stay (4a) is composed of a plurality of beam-like members extending substantially radially from the motor (3b),
Further, in the portion of the blower stay (4a) corresponding to the tip side of the blade (3d), an annular ring that prevents the blade (3d) from directly interfering with the heat exchanger (2). The heat exchange device according to claim 3, wherein an interference prevention ring (4b) is provided. The heat exchange device according to claim 4, wherein the fan (3a) side of the interference prevention ring (4b) protrudes more toward the fan (3a) than the blower stay (4a).

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