JPS6396491A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat exchanging efficiency, by a method wherein a tubular bulkhead dividing the inside of a tubular body into respective inside and outside paths is provided, and thick flanges are formed on the outside surface of the bulkhead integrally with the bulkhead, while a multitude of parallel fins is provided on the flanges, and radial fins are formed on the inner surface of the bulkhead integrally respectively. CONSTITUTION:A heat exchanging area, through which air for room heating or the like flows, is increased very much by parallel fins 5, a heat transfer area can be widened effectively along the whole length of the outside path, and heat transfer or heat exchange is improved. The parallel fins 5, provided in the outside path, can be provided with higher density compared with the radial fins 6 in the inside path of the heat exchanger whereby the heat transfer area of the parallel fins 5 can be increased much more. The bulkhead 3, parallel fins 5 and the radial fins 6 are made of a metallic material such as aluminum or the like, which is prominent in heat transfer rate, therefore, the heat exchanging efficiency of the title heat exchanger is very good and the heat of combustion gas may be transferred to the air for room heating or the like with a good efficiency.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to heating devices and drying devices for vehicles equipped with internal combustion engines, vehicles such as trailers, domestic rooms, drying rooms, offices, etc. This invention relates to a heat exchanger that can be applied to, etc.

[Conventional technology]

Conventionally, indoor heating in vehicles was carried out by extracting the cooling water from the internal combustion engine through hot water piping, guiding it to a heater device, and indirectly performing heat exchange and sending hot air into the vehicle. be. In addition, a burner, that is, a combustor and a heat exchanger are installed in the intake passage of the engine, and the combustor is ignited immediately after the engine starts, the heat is used to warm the air in the heat exchanger, and the warmed air is sent into the vehicle interior. In other words, an automotive heating system that heats the room using the amount of heat generated by burning fuel in a combustor regardless of the internal combustion engine (for example, see Japanese Patent Application Laid-Open No. 60-252018).
is disclosed.

There is also a heat exchanger for heating a vehicle as disclosed in Japanese Patent Laid-Open No. 188216/1983. This vehicle heating heat exchanger will be outlined with reference to FIGS. 2 and 3.

In FIG. 2, regarding the vehicle heating heat exchanger 5o,
A heat flow passage is arranged within the heat absorption passage. The heat flow passage is constituted by a first cylinder 51 and a second cylinder 52, and the heat absorption passage is constituted by a third cylinder 53. First cylinder 51, second cylinder 52 and third cylinder 53
are placed coaxially. A combustor 55 is connected to one end of the first cylinder 51, and the combustion gas of the combustor 55 is transferred to the first cylinder 51.
sent into 1. The other end of the first cylinder 51 communicates with one end of a second cylinder 52 via a folding guide 54, and the other end of the second cylinder 52 is connected to a gas outlet 56. An air outlet 57 is formed at one end of the third cylinder 53 constituting the heat absorption passage to take in cold air, and an air outlet 59 is formed at the other end to send out warm air. Cold air C is blown into the air conditioner 57 from the blower 61, and warm air H from the air outlet 59 is sent to an air conditioner 62 installed downstream.Then, the warm air H is sent from the air conditioner 62 into the vehicle interior. Figure 3 is the second
It is a sectional view taken along line ■-■ in the figure. As shown in FIG. 3, between the first cylinder 51 and the second cylinder 52, there are heat transfer fins 58 that extend in the radial direction integrally with the second cylinder 52.
Furthermore, heat exchange fins 60 are formed between the second cylinder 52 and the third cylinder 53, and similarly extend integrally with the second cylinder 52 in the radial direction.

[Problem that the invention seeks to solve]

However, in the case of indoor heating using the cooling water of the internal combustion engine, the speed of temperature rise of the cooling water is slow, so it takes time for the heater body to send out warm air, and during that time the heating function of the heater is delayed. is almost non-existent. In other words, it takes about 10 minutes or more for gasoline engines and about 2 minutes for diesel engines until the engine warms up.
Currently, it takes more than 0 minutes. During this time, especially in cold regions or in winter, the inside of the car may be cold, and the windows of the car may become frosty.
The defroster that removes ice and the like has a problem in that it cannot function satisfactorily.

In addition, automotive heating systems or engine warm-up systems that use a combustor independent of the internal combustion engine require time and effort for combustion cycles, exhaust gas processing, etc., and require complicated mechanisms, control devices, etc. There is a problem in that it is necessary.

In addition, the above-mentioned problems can be solved with the heat exchanger. A combustor separate from the engine is provided, and the liquid fuel is quickly combusted by a quick ignition system and a quick vaporization system, and the heat of combustion is extracted from the heat exchanger. This is extremely desirable since heating air can be efficiently and quickly generated and delivered into the vehicle interior, and clean heating air that is not contaminated with exhaust gas is produced, but the combustor does not ignite rapidly. There has been a demand for a heat exchanger that can rapidly perform heat exchange by matching the heat exchange function of a combustor to that of a combustor.

In order to achieve heat exchange efficiently in a heat exchanger, the shape and arrangement of the fins formed on the heat exchanger are influenced by how they are formed, and in that respect, regarding the above heat exchanger. The problem is that the fins provided for heat exchange cannot function satisfactorily, resulting in insufficient heat exchange efficiency.

The purpose of this invention is to solve the above-mentioned problems, and the purpose of this invention is to receive combustion gas instantaneously sent out from a combustor built into a heating device that can rapidly heat the room. For example, the heat of the combustion gas can be rapidly exchanged with heating air to generate warm air, which can then be sent into the vehicle for heating.Moreover, by configuring the fins in a special shape, the heat can be In addition to increasing the exchange area, it allows combustion gas generated in the combustor and air for heating to flow smoothly, improving heat exchange efficiency, and is highly durable with a simple structure and easy manufacture. The objective is to provide a heat exchanger that

[Means for solving problems]

In order to solve the above problems and achieve the above objects, the present invention is configured as follows.

That is, in the present invention, a cylindrical partition part that divides the inside of the cylindrical body into an inner passage and an outer passage is disposed within the cylindrical body, and a thick flange part is integrally formed on the outer surface of the partition part, A large number of parallel fins extending from the outer surface of the partition wall portion and the flange portion are integrally formed, and a large number of radial fins extending in the axial direction are further integrally formed on the inner surface of the partition wall portion. More specifically, regarding the heat exchanger, the parallel fins are provided at a higher density than the radial fins, and the partition wall portion, the parallel fins, and the radial fins are made of aluminum or the like having a high thermal conductivity. The parallel fins and the radial fins are arranged along the flow direction of the fluid, and the radial fins on the inside of the partition wall receive the heat of the combustion gas generated in the combustor. The present invention relates to a heat exchanger characterized in that the heat exchanger is a fin, and the fin on the outside of the partition wall is a radiation fin that radiates heat to heating air.

[Effect]

The heat exchanger according to the present invention is constructed as described above and operates as follows. That is, in this heat exchanger, a cylindrical partition part that divides the cylindrical body into an inner passage and an outer passage is disposed within the cylindrical body, and a thick flange part is integrally formed on the outer surface of the partition part. However, since a large number of parallel fins extending from the outer surface of the partition wall portion and the flange portion are integrally formed, and furthermore, a large number of radial fins extending in the axial direction are integrally formed on the inner surface of the partition wall portion. Because of the parallel fins, the heat exchange area through which heating air and the like flow can be greatly increased, and the heat transfer area can be effectively widened over the entire length of the outer passage, thereby improving heat transfer. The parallel fins installed in the outer passage can be provided at a higher density than the radial fins in the inner passage, and the heat transfer area of the parallel fins can be increased accordingly. In addition, since the partition wall portion, the parallel fins, and the radial fins are made of a metal material with excellent thermal conductivity such as aluminum, the heat exchange efficiency is extremely high, and the heat of the combustion gas is transferred to the heating air, etc. can. Furthermore, since the parallel fins and the radial fins are arranged along the fluid flow direction, the combustion gas, heating air, etc. can flow smoothly without being obstructed.

〔Example〕

Hereinafter, one embodiment of the heat exchanger according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, a heat exchanger according to the invention is indicated generally by the reference numeral 1. In FIG. For this heat exchanger 1, for example, air is taken in through an air cleaner of a diesel engine or a gasoline engine, a separate air cleaner, etc., or air is taken in directly from outside or indoors from an air intake pipe (not shown) to a combustor ( (not shown) and is installed downstream of the combustor to take in the combustion gas generated in the combustor through a heat flow passage pipe. The heat exchanger 1 has a structure in which a cylindrical partition wall 3 is disposed within a cylindrical outer housing, that is, a rectangular cylinder body 2, which is cylindrical and has an octagonal shape in the figure. In other words, the cylindrical partition wall 3 that divides the inside of the rectangular cylinder 2 into an inner passage and an outer passage is disposed within the rectangular cylinder 2. A thick flange portion 4 is integrally formed on the outer surface of the partition wall portion 3 in a shape extending in the radial direction and in the opposite direction. A large number of radial fins 6 and parallel fins 5 are integrally formed on the inside of the partition wall 3 and on the outside thereof. These radial fins 6 are heat receiving fins 6 that extend in the same direction in the axial direction. Further, the parallel fins 5 are a large number of radiation fins 5 extending on the outer surface of the partition wall 3 and are integrally formed on the partition wall 3 and the flange section 4. In the figure, they extend parallel to each other in line symmetry with the partition wall portion 3 and flange portion 4 as centers. Further, the partition wall portion 3, the flange portion 4, the heat receiving fins 6, and the heat dissipating fins 5 are made of a metal material with excellent thermal conductivity such as aluminum. A heat flow passage 9 is formed in the partition wall 3 for dissipating heat to an inner passage, that is, in this case, to the heating air. Further, between the rectangular cylinder body 2 and the partition wall portion 3, there is formed an outer passage, that is, in this case, an endothermic passage 8 that absorbs heat from the combustion gas from the combustor. Therefore, the heat flow path 9
Heat-receiving fins 6 are arranged between the heat-receiving fins 6, and the combustion gas generated in the combustor flows between the heat-receiving fins 6. In addition, the heat flow passage 9
Radiation fins 5 are arranged to receive and radiate the heat of the combustion gas conducted through the heat-receiving fins 6 and the partition wall portion 3, and heating air is configured to flow between the radiation fins 5. The partition wall portion 3 is provided with an exhaust pipe (not shown) for exhausting combustion gas to the outside or to another device, for example, an intake system of an engine when mounted on a vehicle.

The rectangular cylinder body 2 and the partition wall portion 3 are arranged coaxially with each other. The rectangular tube body 2 constitutes the outer case of the heat exchanger 1, and when applied to a vehicle etc., it is equipped with a heat insulating material etc. (not shown).
covered with. Although not shown, both ends of the outer case are formed with an air intake port at one end and an air outlet port at the other end.

One end of the heat flow passage 9, that is, the partition wall 3 and the combustor (not shown)
They are electrically connected to each other through a heat flow passage pipe or the like.

Further, a combustion gas exhaust port (not shown) is formed at the other end of the heat flow passage 9. The heat receiving fins 6 and the heat dissipating fins 5 are preferably provided integrally with the partition wall 3 from the viewpoint of heat conduction. In other words, the heat receiving fins 6 are formed inside the partition wall 3 and the heat radiating fins 5 are formed on the outside of the partition wall 3. It is also possible to construct the inner and outer parts separately with the partition wall 3 in between, and then fit them together.

The heat exchanger 1 according to the present invention is constructed as described above and operates as follows. Although the specific structure of the combustor is not explained, - along with an example,
The operation of the heat exchanger 1 will be explained.

The combustor ignites and burns rapidly, and consists of a combustion tube having a vaporization chamber and a combustion chamber, and a vaporization device and an ignition glow plug are disposed within the combustion chamber. The vaporization device includes a vaporization glow plug therein, and vaporizes liquid fuel to produce vaporized fuel. The generated vaporized fuel is injected from the vaporization device into the vaporization chamber, the vaporized fuel is ignited by the ignition glow plug, and is blown out into the combustion chamber. Next, in the combustion chamber, the vaporized fuel is made homogeneous with the combustion air blown into the combustion tube, and enters a combustion state. Combustion gas generated by the combustor is blown into one end of the heat flow passage 9 in the partition wall 3 of the heat exchanger 1 through a heat flow passage pipe or the like. The combustion gas that has passed through the heat flow passage 9 is transferred to the partition wall 3
Exhaust is exhausted from an exhaust pipe (not shown) at the other end. While the combustion gas passes through the heat flow path 9, the heat of the combustion gas is taken away through the heat receiving fins 6 and the inner surface of the partition wall 3. In other words, the heat is received and conducted to the outer surface of the partition wall 3. Heat radiation fins 5 are arranged in the heat absorption passage 8 between the outer cylinder housing, that is, the rectangular cylinder body 2 and the partition wall portion 3, and the heat of the combustion gas is conducted to these radiation fins 5 and radiated to the heat absorption passage 8. .

On the other hand, heating air sent from an air intake (not shown) by a blower (not shown) or the like is passed through the heat absorption passage 8, and the heating air is turned into warm air, for example, in a vehicle, etc. It is blown out into the room. Furthermore, when applied to a vehicle, the exhaust gas released can be configured to be sent to the intake system of the engine.

As described above, the embodiments of the heat exchanger according to the present invention have been described in detail, but the invention is not necessarily limited to these details. For example, the heat exchanger 1 can be used by being mounted on a vehicle or the like. In the figure, the cylinder which is the outer cylinder housing is formed into a rectangular cylinder due to space limitations such as vehicles or from the viewpoint of installation stability, but it is not necessarily limited to such a shape. For example, it goes without saying that it can be configured in various shapes such as a cylindrical shape and an elliptical shape. Further, although the flange portion is formed in the diametrical direction passing through the center of the partition wall, the flange portion may be formed on the line connecting the inner surface of the rectangular cylinder and the outer surface of the partition wall to the outer cylinder housing. Of course, the position where the flange portion should be formed is not limited to the partition wall portion. Furthermore, an example is shown in which the radial fins on the inside of the partition wall are used as heat receiving fins that receive heat from combustion gas generated in a combustor, and the fins on the outside of the partition wall are used as heat radiating fins that radiate heat to heating air. However, for example, it can also be used as a vaporizer that vaporizes liquid fuel to generate vaporized fuel in a combustor, and in that case, the heat of the combustion gas combusted at the outer circumference of the partition wall is It may also be configured to receive heat by the fins and radiate the conducted heat from the radial fins in the partition wall to vaporize the liquid fuel sent into the partition wall. That is, the radial fins on the inside of the partition wall are used as heat radiation fins that radiate heat to the fluid flowing inside, and the fins on the outside of the partition wall are used as heat receiving fins that receive heat from the combustion gas generated in the combustor. You can also do that.

Further, the heat exchanger is shown as having a double structure in which a partition wall portion is disposed within a rectangular cylinder body, but a cylindrical body may be further disposed within the partition wall portion, for example, as shown in FIG. 2 or 3. Of course, it may be configured to have three passages.

In this case, the lid can be fixed in order to isolate the end of the partition wall from the heat absorption path through which heating air passes. By attaching the lid to the end of the partition wall, the combustion gas flow path, ie, the heat flow path, and the heated air flow path, ie, the heat absorption path, are completely cut off. Furthermore, regarding this lid body, heat receiving fins and heat dissipating fins may be integrally provided, and regarding the heat receiving fins, the heat receiving fins of the heat flow return path cylinder body may be extended;
Of course, the number of heat-receiving fins and heat-radiating fins of the lid does not necessarily have to be the same as the number of heat-receiving fins and heat-radiating fins provided in the heat flow passage and the heat absorption passage.

〔Effect of the invention〕

The heat exchanger according to the present invention is configured as described above, and has the following effects. That is, this heat exchanger is
A cylindrical partition that divides the inside of the cylinder into an inner passage and an outer passage is disposed within the cylinder, a thick flange is integrally formed on an outer surface of the partition, and a thick flange is integrally formed on the outer surface of the partition. Since a large number of parallel fins extending from the flange portion are integrally formed, and a large number of radial fins extending in the axial direction are integrally formed on the inner surface of the partition wall portion, a heat exchange area through which heating air flows can be increased. Because of the parallel fins, the heat transfer area is greatly increased due to the parallel fins, and the heat transfer area can be effectively widened over the entire length of the heat absorption passage, and heat transfer, that is, heat exchange, can be achieved extremely well and rapidly. The parallel fins installed in the heat absorption passage can be provided at a higher density than the radial fins, and the heat transfer area can be increased accordingly. Further, since the partition wall portion, the parallel fins, and the radial fins are made of a metal material with excellent thermal conductivity such as aluminum, the heat exchange efficiency is extremely high and the heat of the combustion gas can be transferred to the heating air. . Furthermore, since the parallel fins and the radial fins are arranged along the fluid flow direction, in other words, the combustion gas and the heating air are provided along the streamlines, so the combustion gas and the heating air are arranged along the flow line. The heat exchange efficiency can be improved by allowing smooth flow without impeding the flow of heat. Moreover, it has an extremely simple structure and is easy to handle.
It has various effects such as fewer breakdowns and easy maintenance.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of a heat exchanger according to the present invention, Fig. 2 is a cross-sectional view showing an example of a heat exchanger according to the prior art, and Fig. 3 is a cross-sectional view showing an example of a heat exchanger according to the prior art. FIG. t-----1 heat exchanger, 2--- Square cylinder body, 3--
-----One partition part, 4・------Flange part, 5・-
11---parallel fins, 6---11---radial fins, 8---1 heat absorption passage, 9---1111 heat flow passage. Kaya once. 3゜ ge°゛

Claims (6)

[Claims] (1) A cylindrical partition part that divides the inside of the cylindrical body into an inner passage and an outer passage is disposed within the cylindrical body, a thick flange part is integrally formed on the outer surface of the partition part, and the partition part A heat exchanger characterized in that a large number of parallel fins extending from the outer surface of the partition wall and the flange portion are integrally formed, and a large number of radial fins extending in the axial direction are further integrally formed on the inner surface of the partition wall portion. vessel. (2) The heat exchanger according to claim 1, wherein the parallel fins are provided at a higher density than the radial fins. (3) The heat exchanger according to claim 1, wherein the partition wall portion, the parallel fins, and the radial fins are made of a metal material with excellent thermal conductivity, such as aluminum. (4) The heat exchanger according to claim 1, wherein the parallel fins and the radial fins are arranged along the fluid flow direction. (5) The radial fins on the inside of the partition wall are heat receiving fins that receive heat from combustion gas generated in the combustor, and the parallel fins on the outside of the partition wall are radiation fins that radiate heat to heating air. The heat exchanger according to claim 1, characterized in that: (6) The radial fins inside the partition wall are heat radiation fins that radiate heat to the fluid flowing inside, and the parallel fins outside the partition wall are heat receiving fins that receive heat of combustion gas generated in the combustor. The heat exchanger according to claim 1, wherein the heat exchanger is a fin.