JPH0549445U - Protective net - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a protective net capable of reliably preventing damage to a protection target regardless of the size of flying objects and having excellent durability. [Structure] The wire nets 22 and 23 are reinforced by the core material 21 formed in a honeycomb shape, and the durability is improved. Further, flying objects larger than the mesh of the wire net 22 are prevented from entering the protective net 10 by the wire net 22 and repelled forward. On the other hand, among the small flying objects that have passed through the mesh of the wire net 22, those that have entered obliquely hit the inner surface of the tubular portion 21 a of the core material 21 before reaching the heat exchanger 10. At this time, the impact of the flying object is absorbed by the core material 21 being plastically or elastically deformed by the collision of the flying object. As a result, flying objects are fins 1
2 loses kinetic energy to deform 2
Damage is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a protective net attached to a condenser of various air conditioners, a radiator for a vehicle, or the like.

[0002]

[Prior Art]

 Conventionally, a protective net is attached to the surface of a heat exchanger used as a condenser of a vehicle air conditioner to prevent damage from flying objects when the vehicle is running.

[0003]

[Problems to be solved by the device]

 However, the conventional protective net has a problem that it is poor in durability and easily damaged or distorted because it is only a wire mesh. In addition, while conventional protective nets can prevent flying objects larger than the mesh, those smaller than the mesh pass through the protective net. In this case, flying objects that go straight along the fins of the heat exchanger pass through the heat exchanger without hitting the fins, but flying objects that enter obliquely to the fins collide with the side surfaces of the fins. At that time, flying objects are accelerated at high speed by the traveling of the vehicle, and because the fins are made of thin soft metal, the impact is sufficient to deform the fins even for small flying objects. give. As a result, there was a problem that the deformation of the fins was the cause of impediment, the flow of air was obstructed, and the heat exchange rate decreased.

The present invention has been made in view of the above problems, and an object of the present invention is to reliably prevent damage to a protection target regardless of the size of a flying object and to provide durability. To provide an excellent protective net.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the protective net of the present invention comprises a plate-shaped core member formed by arranging a large number of cylindrical portions extending toward the object to be protected, and at least one surface of the core member. And a net body for covering.

[0006]

[Action]

 According to the protective net of the present invention, since the net is reinforced by the core material, the durability is improved. In terms of protection, flying objects larger than the mesh of the net are prevented from entering the side of the object to be protected by the net. On the other hand, among the small flying objects that have passed through the mesh of the mesh body, the flying objects that have entered the protection net at an angle collide with the inner surface of the tubular part of the core material before reaching the protection target, Kinetic energy is absorbed.

[0007]

【Example】

 1 and 2 show an embodiment of the present invention, in which 10 is a heat exchanger as an object to be protected, and 20 is a protective net attached to the heat exchanger 10.

The heat exchanger 10 is composed of a flat tube 11 for flowing a refrigerant, which is bent in a meandering shape, and a fin 12 for heat exchange, which is interposed between the tubes 11. Unions 13 (only one of which is shown) for connecting pipes are attached to both ends of. Further, reinforcing members 14 having a U-shaped cross section are fixed to both sides of the tube 11, and one side surface of each reinforcing member 14 is provided with a screw hole 14a for fixing the protective net 10. There is.

The protective net 10 is composed of a plate-shaped core member 21 formed in a honeycomb shape, and two front and rear metal nets 22 and 23 that cover both surfaces of the core member 21, and both sides of the front metal net 22 are attached. It is supported by a plate 24. The core member 21 has a large number of tubular portions 21a having a hexagonal cross section that extend toward the heat exchanger 10 in parallel, and each tubular portion 21a has a length in the thickness direction of the core member 21 of about 10 mm. The opening area at one end is formed to be about 10 to 100 mm ² . Further, the core material 21 is formed of a light weight metal or plastic having a proper plasticity such as aluminum. In this protective net 10, the wire nets 22 and 23 are reinforced by the core material 21 by joining the wire nets 22 and 23 and the core material 21 by an adhesive or brazing. Then, the protective net 10 is attached to the heat exchanger 10 by fixing the upper part and the lower part of each mounting plate 24 to the reinforcing member 14 of the heat exchanger 10 with the screws 25.

Next, the protective action of the protective net 10 of this embodiment will be described with reference to FIG.

First, the flying object A, which is larger than the mesh of the wire net 22, is prevented from entering the protective net 10 by the wire net 22 and is repelled forward. On the other hand, among the small flying objects B that have passed through the mesh of the wire mesh 22, those that have gone straight along the fins 12 pass behind the heat exchanger 10 without hitting the fins 12 or the side ends of the fins 12 Since it directly hits the fin 12, it does not cause fatal damage to the fin 12. Further, the flying object B that obliquely enters the front surface of the heat exchanger 10 hits the inner side surface of the tubular portion 21a of the core material 21 before reaching the heat exchanger 10. At this time, the collision of the flying object B causes the core material 21 to be plastically or elastically deformed, and the impact of the flying object B is absorbed. As a result, the flying object B loses kinetic energy enough to deform the fin 12, and damage to the fin 12 is prevented.

As described above, according to the protective net 10 of this embodiment, since the honeycomb-shaped core material 21 is interposed between the metal nets 22 and 23, the respective wire nets 22 and 23 are reinforced and the protective net 10 The durability can be significantly improved. In addition, since the core material 21 is lightweight, the weight of the protective net 10 is not increased. Further, since the flying object B that has entered the protective net 10 is made to collide with the tubular portion 21a of the core member 21 so as to absorb the impact of the flying object B, the fin 12 is surely prevented from being damaged. be able to.

3 to 5 show modified examples of the core material. That is, the core material 25 shown in FIG. 3 is formed by combining elongated plate materials in a lattice shape to form the tubular portion 25a having a square cross section. Further, the core member 27 shown in FIG. 4 is configured such that a tubular portion 27a is formed by joining pipe-shaped members each having a circular cross section in a sliced manner and connecting them in parallel. In addition, the core material 28 shown in FIG. 5 is configured such that a tubular portion 28a is formed by connecting pipe-shaped members having a rectangular cross section in a ring shape and connecting them in parallel.

The present invention can also be applied to an apparatus having various intake structures such as a vehicle radiator.

[0015]

[Effect of the device]

 As described above, according to the protective net of the present invention, not only the durability can be remarkably improved, but also the weight is not increased due to the improvement of the durability, which is extremely practical. Target. In addition, since damage to the protection target can be reliably prevented regardless of the size of the flying object, the protection of the protection target becomes more complete.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a protective net according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a protective action of a protective net.

FIG. 3 is a perspective view showing a modified example of the core material.

FIG. 4 is a perspective view showing a modification of the core material.

FIG. 5 is a perspective view showing a modified example of the core material.

[Explanation of symbols]

10 ... Heat exchanger, 20 ... Protective net, 21, 26, 27, 2
8 ... Core material, 22, 23 ... Wire mesh, 21a, 26a, 27
a, 28a ... Cylindrical part.

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped core member formed by arranging a plurality of cylindrical portions extending toward a protection target in parallel,
A protective net comprising: a net body that covers at least one surface of the core material.