JPH024372Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a heat exchanger, and more particularly to a heat exchanger that exchanges heat using the flame of a combustor as a heat source.

《Prior Art》 Generally, when heating an automobile, an air conditioning system uses the engine cooling water temperature as a heat source. Therefore, when the engine is started, the cooling water temperature is low, so no heating effect is performed, and the interior of the vehicle is heated. In other words, it takes a considerable amount of time for the internal combustion engine to warm up.

Therefore, in recent years, it has been proposed that the internal combustion engine burns fuel until it is warmed up and uses this as a heat source, allowing the interior of the vehicle to be quickly heated even in cold weather. .

Incidentally, in this case, a heat exchanger is required to exchange the heat of the flame generated by the combustion of fuel in the combustor with the air introduced into the passenger compartment, but this heat exchanger is usually An inner cylinder that introduces flame heat and an outer cylinder that forms an outer peripheral space of this inner cylinder are provided, and the air flowing in the space between the inner cylinder and the outer cylinder and the flame heat in the inner cylinder are A configuration is adopted in which heat exchange is performed between the two. By the way, fins are provided inside the inner cylinder and between the inner and outer cylinders to efficiently transmit the flame heat to the inner cylinder, and to efficiently transfer the flame heat transmitted to the inner cylinder to the air passing through the space. It allows for good heat exchange.

[Problems to be solved by the invention] However, when the flame from the combustor is directly introduced into the inner cylinder, there is a problem in that the fins in the inner cylinder are corroded by the high heat and the durability is significantly deteriorated. Ta.

Therefore, in the present invention, a baffle plate is provided on the flame introduction side of the inner cylinder to prevent the flame of the combustor from being directly introduced into the inner cylinder, and this baffle plate prevents the fins in the inner cylinder from becoming hot. It is an object of the present invention to provide a heat exchanger that prevents the above.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides an inner cylinder for introducing the flame of the combustor, and an outer cylinder provided with a space formed on the outer periphery of the inner cylinder. In this heat exchanger, heat exchange is performed between the fluid passing through the space and the flame heat in the inner cylinder, with the end of the inner cylinder on the flame introduction side facing in a right angle direction. The outer periphery of this bent portion is covered with a flame guide tube that penetrates the outer cylinder at right angles at appropriate intervals, and a cylindrical buttful plate is attached to the tip of the bent portion, and It is constructed by forming a flame heat introduction port on the outer periphery of the bent portion.

<<Operation>> In the heat exchanger of the present invention having the above configuration, the flame of the combustor guided by the flame guide tube is impeded by hitting the buttful plate, and is then dispersed by the btttle plate. The flame heat of the flame is indirectly introduced into the inner cylinder through the flame heat introduction port.

<<Example>> Hereinafter, an example of the present invention will be described in detail based on the drawings.

That is, FIG. 1 and FIG. 2 show a heat exchanger 10 showing an embodiment of the present invention, which includes an inner cylinder 12 into which burned flame heat is introduced, and a space S on the outer periphery of the inner cylinder 12.
The outer cylinder 14 is provided to form an outer cylinder 14.
Inside the inner cylinder 12, there is one support rod 16 on its central axis.
A first fin 18 having a smaller diameter than the inner cylinder 12 is inserted between the support rod 16 and the inner circumference of the inner cylinder 12.
A large number of second fins 20 having an open center are arranged alternately at appropriate intervals, and the flame heat introduced into the inner cylinder 12 is absorbed by the first and second fins 18,
It is designed to pass through 20 spaces in a maze-like manner.

Further, a bent end portion 22 in a right angle direction is formed on the flame heat discharge side (right side in the figure) of the inner cylinder 12, and this bent end portion 22 penetrates the side surface of the outer cylinder 14, and the end portion A flame heat exhaust port 24 is formed in the. Note that a support rod 16 is also provided inside the bent end portion 22 of the inner cylinder 12.
a, and first and second fins 18, 20 are provided so that exhausted combustion heat can be efficiently absorbed.

Both ends of the outer cylinder 14 are closed by closing plates 26 and 28, and an air intake port 30 is formed in one closing plate 26 (on the right side in the figure), and an air intake port 30 is formed in the closing plate 26 on the other side (on the left side in the figure). An air exhaust port 32 is formed in the. A large number of small-diameter fins 34 are attached to the outer circumference of the inner cylinder 12, and these small-diameter fins 34 are divided into three parts by three large-diameter fins 36 that fill the spaces between the inner and outer cylinders 12 and 14. Separated. The large-diameter fins 36 are formed with notches 36a such that adjacent ones are on opposite sides, and the air flowing through the space S can flow through the notches 36a.
It is designed to be passed through in a maze-like manner.

Note that 38 is a mounting bracket for mounting on the vehicle body side.

In this embodiment, the combustion heat introducing side end of the inner cylinder 12 is bent in a direction perpendicular to the cylinder axis, and an appropriate interval is provided on the outer periphery of this bent part 40, The outer cylinder 14 is covered with a flame guide cylinder 42 that passes through the outer cylinder 14 in a right angle direction, and a cap-shaped (conical) buff-full plate 44 is attached to the tip of the bent part 40. A flame heat introduction port 46 is formed in the side wall of the bent portion 40, and flame heat is introduced into the inner cylinder 12 through the flame heat introduction port 46.

A combustor (not shown) is attached to the end of the flame guide tube 42 protruding from the outer tube 14, and a flame is generated by this combustor.

With the above configuration, in the heat exchanger of this embodiment, the flame of the combustor introduced into the flame guide tube 12 hits the baffle plate 44 and is dispersed.
Then, it is enclosed from the peripheral edge of the buff-full plate 44 and guided into the inner cylinder 12 through the flame heat introduction port 46.

Therefore, the flame heat introduced into the inner cylinder 12 is
The heat after hitting the buff-full plate 44 is indirectly introduced. The flame heat introduced into the inner cylinder 12 is transferred to the wall of the inner cylinder 12 via the first fin 18 and the second fin 20 while being guided to the discharge port 24, and further, The inner cylinder 12
Heat is transferred from there to the small diameter fins 34 and large diameter fins 36 of the inner and outer cylinders 12 and 14.

On the other hand, the air introduced into the space S between the inner and outer cylinders 12 and 14 from the air intake port 30 formed in the outer cylinder 14 flows through each fin 3 between the inner and outer cylinders 12 and 14.
4 and 36, and is discharged from the air outlet 32 into the vehicle interior. Therefore, the air discharged from the air outlet 32 is warmed by the heat of the flame, and the interior of the vehicle is quickly heated without waiting for the internal combustion engine to be warmed up.

By the way, in this embodiment, since the flame of the combustor blocked by the baffle plate 44 is indirectly introduced into the inner cylinder 12 as described above, the fins 18, 20 is prevented from being directly hit by the flame of the combustor, and the fins 18, 20
corrosion is prevented and durability is significantly improved.

<<Effect of the invention>> As explained above, in the heat exchanger of the invention, when the flame heat of the combustor is introduced into the inner cylinder, after the flame of the combustor is once applied to the baffle plate, Since indirect heat is introduced, the flame of the combustor is prevented from directly hitting the fins in the inner cylinder, thereby preventing corrosion of the fins.

Therefore, by forming the baffle plate from a material with excellent heat resistance, the fins in the inner cylinder can be formed from a material with high thermal conductivity, which improves the heat exchange rate and durability. It has an excellent effect of being able to achieve the desired results.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the heat exchanger of the present invention, and FIG. 2 is a sectional view taken along the line -- in FIG. 10... Heat exchanger, 12... Inner cylinder, 14... Outer cylinder, 40... Bent part, 42... Flame guide tube, 44
...Bassful plate, 46...Flame heat introduction port,
S... Spatial part.

Claims (1)

[Scope of utility model registration request] It has an inner cylinder that introduces the flame of the combustor, and an outer cylinder that is provided with a space formed on the outer periphery of this inner cylinder, and there is a space between the fluid passing through this space and the flame heat in the inner cylinder. In a heat exchanger that now performs heat exchange, the flame introduction side end of the inner cylinder is bent in a right angle direction, and the outer circumference of this bent part is set at an appropriate interval, and the outer cylinder is bent in the right angle direction. What is claimed is: 1. A heat exchanger characterized in that the heat exchanger is covered with a flame guide tube that penetrates through the bent portion, a hat-shaped buttful plate is attached to the tip of the bent portion, and a flame heat introduction port is formed on the outer periphery of the bent portion.