JP2002327991A - Evaporation heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporation heat exchanger which exerts its function without incurring abnormal superheating due to no-water heating even when a movable body, such as a motor vehicle, is inclined or accelerated/decellerated. SOLUTION: The heat exchanger has such a structure that a header exit hole 41 is rendered to be a small diameter exit hole which serves as a fixed throttling for increasing passage pressure loss. Thus the inner pressure of a header 33 is kept at a high level so that the inside of the header is constantly filled with supplied liquid fuel 46. Alternatively, the heat exchanger may be constructed such that; the inside of the header is partitioned by partitioning plate-into a plurality of sections; a liquid fuel supply pipe, in which a pipe exit hole is provided to each of the sections, is disposed at an upper part of the sections; and the pipe exit hole is rendered to be a small diameter hole that serves as a fixed throttling so as to increase passage pressure loss. Thus the inner pressure of the liquid fuel supply pipe is kept at a high level so as to be constantly filled with the supplied liquid fuel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporization heat exchanger, and is useful, for example, when applied to a vaporization heat exchanger of a fuel reforming system in a fuel cell power generation system mounted on a moving body such as a vehicle.

[0002]

2. Description of the Related Art In a fuel cell power generation system, a fuel gas and an oxidizing gas are supplied to a fuel cell body such as a cell stack to generate power by an electrochemical reaction. In this case, a hydrogen-rich gas obtained by reforming a liquid fuel such as methanol is used as the fuel gas. For this reason, the fuel cell power generation system is also equipped with fuel reforming system equipment.

In a fuel reforming system, first, liquid fuel such as methanol stored in a fuel tank is supplied to a vaporizing heat exchanger by an injector (pump), where the fuel is vaporized and overheated. Subsequently, the fuel vaporized by the vaporization heat exchanger is sent to the reformer, where it is reformed into a hydrogen-rich reformed gas (hydrogen-rich gas) using a reforming catalyst. Then, this hydrogen-rich gas is purified by a purifier, and then supplied to the fuel cell body as a fuel gas. As described above, in the fuel reforming system equipment, the liquid fuel is vaporized in the vaporization heat exchanger before reforming in the reformer, and the configuration of the vaporization heat exchanger has conventionally been as shown in FIGS. It has a configuration. FIG. 7 is a cross-sectional view of a conventional vaporizing heat exchanger, and FIG. 8 is a view as viewed in the direction of arrow A in FIG.

As shown in these figures, a vaporizing heat exchanger 1
Is provided with a header 3 on one end side (upper side) of the heat exchange core portion 2. A header 4 is provided at the other end (lower side) of the heat exchange core 2.
Is provided. A large number of vaporization channels 5 are provided in parallel on the low-temperature side of the heat exchange core unit 2, and a number of high-temperature fluid channels 6 are provided in parallel on the high-temperature side of the heat exchange core unit 2 as heating units. I have. Fins 7 are provided in each high-temperature fluid flow path 6 in a zigzag shape. The high temperature fluid channels 6 and the vaporizing channels 5 are alternately arranged, and each vaporizing channel 5 is located between the adjacent high temperature fluid channels 6. Each vaporization channel 6 has an arrow 23
While the liquid fuel 16 flows from the top to the bottom of the heat exchange core portion 2 by gravity as shown by the arrow,
As shown in the figure, a high-temperature fluid (for example, a combustion gas obtained by burning hydrogen) flows in the depth direction of the heat exchange core portion 2.

[0005] An inlet pipe 8 is connected to the upper surface 9 of the upper header 3, and a header outlet hole 11 is formed in the lower surface 10 of the header 3 for each vaporizing flow path 5. The header outlet hole 11 is provided in the heat exchange core portion 2 for each vaporization flow path 5 so that the flow of the liquid fuel is not biased to one location in the vaporization flow path 5.
(For example, two) in the depth direction (the direction of the arrow 21). On the other hand, an inlet hole 13 is formed in the upper surface 12 of the lower header 4 for each vaporization flow path 5, and an outlet pipe 15 is connected to the lower surface 14 of the header 4.

Accordingly, in this vaporizing heat exchanger 1, the arrow 2
2, into the upper header 3 through the inlet pipe 8,
Liquid fuel such as methanol stored in a fuel tank (not shown) is supplied at a predetermined flow rate by an injector.
The header 3 is composed of one room, and the liquid surface 16a of the liquid fuel 16 supplied into the header 3 is maintained at a certain height. In other words, the header structure of the downflow type heat exchanger that uses the head by gravity to allow the low-temperature side liquid to flow to the heat exchange core has conventionally been used to reduce the variation in the liquid flow rate in the stationary state. In order to keep the liquid level constant, the inside of the header is generally constituted by one room without providing any partition or the like.

[0007] The liquid fuel 16 supplied to the header 3 is distributed from the header outlet hole 11 to each of the vaporization channels 6 of the heat exchange core 2, and at the same time, to each of the high-temperature fluid channels 5 of the heat exchange core 2. A high-temperature fluid supplied from a high-temperature fluid supply device (not shown) flows.

For this reason, the liquid fuel 16 distributed to each vaporization flow path 6 is heated (by exchanging heat with a high-temperature fluid) while flowing through each vaporization flow path 6 by gravity, and is superheated.
The fuel vaporized in each vaporization flow path 5 flows into the lower header 4 from the header inlet hole 13 and is sent to a reformer (not shown) via the outlet pipe 15.

[0009]

However, when the above-mentioned conventional vaporizing heat exchanger 1 is used as a vaporizing heat exchanger of a fuel reforming system facility in a fuel cell power generation system mounted on a vehicle, as shown in FIG. The liquid level 16a of the liquid fuel 16 in the header 3 may be greatly inclined when the vehicle is inclined with the vehicle (for example, when the vehicle stops on a slope) or when the vehicle accelerates or decelerates as shown in FIG. When the liquid level 16a is greatly inclined, the liquid fuel 16 is not supplied to some of the vaporization flow paths 5 as shown by the crosses in FIGS. 2 abnormally overheats.

[0010] Accordingly, in view of the above circumstances, the present invention does not cause abnormal overheating due to emptying even when a moving body such as a vehicle is tilted or accelerated or decelerated, and can exhibit a function as a vaporizing heat exchanger. The task is to provide

[0011]

Means for Solving the Problems A first method for solving the above problems is described below.
The vaporization heat exchanger of the invention includes a header at one end of a heat exchange core portion having a plurality of vaporization flow paths provided in parallel, and the liquid supplied to the header is supplied to the heat exchange core through a header outlet hole. A vaporization heat exchanger for mounting on a moving body, which is configured to be distributed to each vaporization flow path of the unit and to be heated while flowing in each vaporization flow path and vaporized, wherein each vaporization flow of the heat exchange core unit is The header outlet hole provided for each path is a small-diameter outlet hole serving as a fixed throttle that increases the passage pressure loss so that the internal pressure of the header is kept high and the inside of the header is always filled with the liquid supplied to the header. The liquid inside the header is supplied from each small-diameter header outlet hole to each vaporization flow path of the heat exchange core.

Further, the vaporization heat exchanger of the second invention has a header on one end side of a heat exchange core portion having a plurality of vaporization flow paths provided in parallel, and the liquid supplied to the header is A vaporization heat exchanger for mounting on a moving body, configured to distribute from the header outlet hole to each vaporization flow path of the heat exchange core part, heat while flowing in each vaporization flow path, and vaporize, the header. A liquid supply pipe is provided at the top of the small room, with the interior divided by a partition plate and divided into multiple small rooms, and a pipe outlet hole for supplying liquid to each small room of the header is provided for each small room. In addition, by making the pipe outlet hole a small-diameter outlet hole that becomes a fixed throttle that increases the passage pressure loss, the internal pressure of the liquid supply pipe is kept high and the liquid inside the liquid supply pipe is supplied to the liquid supply pipe. And always fill with Characterized by being configured to supply a liquid inside the pipe from the pipe outlet holes of small diameter to the header of each cubicle.

[0013] The vaporization heat exchanger according to a third aspect of the present invention is the vaporization heat exchanger according to the second aspect of the invention, wherein a header portion provided with a partition plate and a liquid supply pipe is detachably attached to the heat exchange core portion. It is characterized by the following.

Further, the vaporizing heat exchanger according to the fourth invention is characterized in that
In the vaporization heat exchanger according to the second or third aspect, the vaporization heat exchanger is a vaporization heat exchanger of a fuel reforming system in a fuel cell power generation system mounted on a moving body, and the liquid is a liquid fuel of a fuel cell. Or water or a mixture thereof.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

<First Embodiment> FIG. 1 is a sectional view of a vaporizing heat exchanger according to a first embodiment of the present invention, and FIG. 2 is a view taken in the direction of arrow B in FIG. The vaporization heat exchanger 31 of the first embodiment shown in these figures is a vaporization heat exchanger of a fuel reforming system equipment in a fuel cell power generation system mounted on a vehicle.

As shown in FIGS. 1 and 2, the vaporizing heat exchanger 31 has a header 33 on one end side (upper side) of the heat exchange core portion 32. A header 34 is provided on the other end (lower side) of the heat exchange core 32. On the low-temperature side of the heat exchange core section 32, a number of vaporization flow paths (low-temperature side flow paths) 35 are provided in parallel, and on the high-temperature side of the heat exchange core section 32, a number of high-temperature fluid flow paths (high-temperature side Flow paths) 36 are provided in parallel. Each high-temperature fluid flow path 36 is provided with a sig-zag fin 37.

The high-temperature fluid channels 36 and the vaporizing channels 35 are alternately arranged, and each vaporizing channel 35 is located between the adjacent high-temperature fluid channels 36. Arrow 5 is shown in each vaporization passage 35.
As shown in FIG. 3, the liquid fuel 46 is heated by the heat exchange core 3 due to gravity.
2, while flowing from the top to the bottom, a high-temperature fluid (for example, a combustion gas obtained by burning hydrogen) flows through each high-temperature fluid flow path 36 in the depth direction of the heat exchange core portion 32 as shown by an arrow 51. .

On the upper surface 39 of the upper header 33, an inlet pipe 3 is provided.
8 are connected, and a header outlet hole 41 is formed in the lower surface 40 of the header 33 for each vaporization flow path 35. The header outlet holes 41 are provided in the depth direction of the heat exchange core portion 32 (in the direction of the arrow 51) for each vaporization flow path 35 so that the flow of the liquid fuel is not biased to one location in the vaporization flow path 35. (For example, two). On the other hand, the lower header 34
The header inlet hole 43 is provided on the upper surface 42 for each vaporization flow path 35.
The outlet pipe 45 is formed on the lower surface 44 of the header 34.
Is connected.

In the first embodiment, the upper header 3
The header exit hole 41 is a small-diameter exit hole serving as a fixed throttle (orifice) for increasing the passage pressure loss. Thus, the internal pressure of the header 33 is kept high, and the inside of the header 33 is always filled with the liquid fuel 46 supplied from the fuel tank to the header 33 via the inlet pipe 38 by the injector (pump). . The liquid fuel 46 in the header 33 is supplied from each of the small-diameter header outlet holes 41 to each of the vaporization channels 35 of the heat exchange core portion 32. Of course, at this time, the diameter of the header outlet hole 41, the internal pressure of the header 33, and the like are appropriately adjusted so that the liquid fuel supplied to each vaporization flow path 35 has a predetermined flow rate.

In the evaporating heat exchanger 31 having the above structure, the arrow 5
As shown at 2, liquid fuel such as methanol stored in a fuel tank (not shown) is supplied into the upper header 33 via the inlet pipe 38 at a predetermined flow rate by the injector. The liquid fuel 46 supplied to the header 33 is distributed from the header outlet hole 41 to the respective vaporization channels 35 of the heat exchange core portion 32, and at the same time, the high-temperature fluid channels 36 of the heat exchange core portion 32 The high-temperature fluid supplied from the fluid supply device flows.

For this reason, the liquid fuel 46 distributed to each vaporization flow path 35 is heated (flows heat with a high-temperature fluid) while flowing through each vaporization flow path 35 by gravity, and is vaporized and overheated. The fuel vaporized in each vaporization flow path 35 flows into the lower header 34 from the header inlet hole 43, and flows out of the outlet pipe 4
The resulting gas is sent to a reformer (not shown) via a reforming catalyst 5 and reformed into a hydrogen-rich reformed gas (hydrogen-rich gas) using a reforming catalyst. Thereafter, the hydrogen-rich gas is purified by a purifying device and supplied to a fuel cell body (not shown) (cell stack or the like) as a fuel gas. The fuel cell body generates power by an electrochemical reaction using the fuel gas and the oxidizing gas (oxygen or air) supplied from the oxidizing gas supply device.

The vaporizing heat exchanger 3 of the first embodiment
According to 1, since the inside of the header 33 is always filled with the liquid fuel 46, when the vaporization heat exchanger 31 is inclined together with the vehicle (for example, when the vehicle stops on a slope), or when the vehicle accelerates or Even when the vehicle decelerates, the liquid level of the liquid fuel 46 in the header 33 does not tilt. For this reason, the vaporization heat exchanger 31 can exhibit the function as a vaporization heat exchanger without any abnormal overheating due to burning even during tilting or acceleration / deceleration. That is, the vaporization heat exchanger 31 of the first embodiment is a vaporization heat exchanger suitable for mounting on a vehicle.

<Embodiment 2> FIG. 3 is a sectional view of a vaporizing heat exchanger according to Embodiment 2 of the present invention, and FIG.
FIG. 5 is an explanatory view showing a state when the vaporizing heat exchanger is inclined, and FIG. 6 is an explanatory view showing a state when the vaporizing heat exchanger is accelerating and decelerating. The vaporization heat exchanger 61 according to the second embodiment shown in these figures is a vaporization heat exchanger for a fuel reforming system facility in a fuel cell power generation system mounted on a vehicle.

As shown in FIGS. 3 and 4, the vaporizing heat exchanger 61 has a header 63 on one end side (upper side) of the heat exchange core portion 62. Further, a header 64 is provided on the other end side (lower side) of the heat exchange core portion 62. On the low-temperature side of the heat exchange core portion 62, a number of vaporization channels (low-temperature side channels) 65 are provided in parallel, and on the high-temperature side of the heat exchange core portion 62, a number of high-temperature fluid channels (high-temperature Flow paths) 66 are provided in parallel. Each high-temperature fluid flow path 66 is provided with a zigzag fin 67.

The high-temperature fluid flow paths 66 and the vaporization flow paths 65 are arranged alternately, and each vaporization flow path 65 is located between adjacent high-temperature fluid flow paths 66. Each vaporization channel 65 has an arrow 8
As shown by 3, the liquid fuel 76 is moved by gravity to the heat exchange core 6.
2, the high-temperature fluid (for example, a combustion gas obtained by burning hydrogen) flows in the high-temperature fluid flow path 66 in the depth direction of the heat exchange core portion 62 as indicated by an arrow 81. I have.

An inlet pipe 6 is provided on the upper surface 69 of the upper header 63.
8 are connected, and a header outlet hole 71 is formed in the lower surface 70 of the header 63 for each vaporization flow path 65. In order to prevent the flow of the liquid fuel from being biased to one location in the vaporization flow path 65, the header outlet holes 71 are provided in the depth direction of the heat exchange core portion 62 (in the direction of arrow 81) for each vaporization flow path 65. (For example, two). On the other hand, the lower header 64
A header inlet hole 73 is provided on each upper surface 72 for each vaporization passage 65.
The outlet pipe 75 is formed on the lower surface 74 of the header 64.
Is connected.

In the second embodiment, the inside of the header 63 is divided into a plurality (five in the illustrated example) of small rooms 78 by being partitioned by a partition plate 77. Also,
A liquid fuel supply pipe 85 is provided in the header 63, and an inlet pipe 68 is connected to the liquid fuel supply pipe 85. The liquid fuel supply pipes 85 are arranged above the small rooms 78, and one pipe outlet hole 86 is provided for each small room 78.

In addition, by making these pipe outlet holes 86 small-diameter outlet holes serving as fixed throttles (orifices) for increasing the passage pressure loss, the liquid fuel supply pipe 85 is formed.
Is kept high so that the inside of the liquid fuel supply pipe 85 is always filled with the liquid fuel 76 supplied from the fuel tank to the liquid fuel supply pipe 85 via the inlet pipe 68 by the injector (pump). . As a result, the liquid fuel 7 in the liquid fuel supply pipe 85
6 is connected to the header 63 through each of the small-diameter pipe outlet holes 86.
Are supplied (distributed) to each of the small rooms 78 as evenly as possible.

Of course, at this time, the diameter of the pipe outlet hole 86 and the internal pressure of the liquid fuel supply pipe 85 are appropriately adjusted so that the liquid fuel supplied to each vaporization flow path 35 has a predetermined flow rate. , The liquid fuel 76 in each small chamber 78
Is maintained at a predetermined height. The number of small rooms 78 (that is, the size of one small room) may be appropriately set according to the expected inclination and acceleration / deceleration of the vehicle.

The header 63 is fixed by bolts 87
The heat exchange core portion 62 is fixed to a mounting seat 88 via a gasket 90. Therefore, if the bolt 87 is loosened, the header 63 can be removed from the heat exchange core portion 62. That is, the header 63 including the partition plate 77 and the liquid supply pipe 85 is detachably attached to the heat exchange core portion 62. FIG. 4 shows a state in which the header 63 is removed by an alternate long and short dash line.

In the vaporizing heat exchanger 61 having the above configuration, the arrow 8
As shown by 2, a liquid fuel such as methanol stored in a fuel tank (not shown) is supplied at a predetermined flow rate to a liquid fuel supply pipe 85 in the upper header 33 via an inlet pipe 68 by an injector. Liquid fuel supply pipe 85
Is supplied to each small chamber 78 of the header 63 from the pipe outlet hole 86. The liquid fuel 76 supplied to each of the small chambers 78 of the header 33 is distributed from the header outlet hole 71 to each of the vaporization channels 65 of the heat exchange core portion 62,
At the same time, the high-temperature fluid supplied from a high-temperature fluid supply device (not shown) flows through each high-temperature fluid channel 65 of the heat exchange core portion 62.

For this reason, the liquid fuel 76 distributed to each of the vaporization channels 65 is heated while flowing through each of the vaporization channels 65 by gravity (exchanging heat with a high-temperature fluid), and is vaporized and overheated. The fuel vaporized in each vaporization flow path 65 flows into the lower header 64 from the header entrance hole 73 and exits from the outlet pipe 7.
The resulting gas is sent to a reformer (not shown) via a reforming catalyst 5 and reformed into a hydrogen-rich reformed gas (hydrogen-rich gas) using a reforming catalyst. Thereafter, the hydrogen-rich gas is purified by a purifying device and supplied to a fuel cell body (not shown) (cell stack or the like) as a fuel gas. In the fuel cell body, power is generated by an electrochemical reaction using the fuel gas and the oxidizing gas (oxygen or air) supplied from the oxidizing gas supply device.

The vaporizing heat exchanger 6 according to the second embodiment
According to 1, the inside of the upper header 63 is divided by a partition plate 67 into a plurality of small rooms 78, and a liquid fuel supply pipe 8 for supplying a liquid fuel 76 to these small rooms 78.
5 is always filled with the liquid fuel 76, the vaporization heat exchanger 61 is tilted together with the vehicle as shown in FIG. 5 (when the vehicle stops on a slope, or the like), or
As shown in FIG. 6, even when the vehicle accelerates or decelerates, the inclination of the liquid surface 76a of the liquid fuel 76 in each small room 78 is small (the liquid surface is inclined in each small room), and the liquid fuel supply pipe The liquid surface of the liquid fuel 76 in 85 does not tilt. For this reason, the vaporization heat exchanger 61 can exhibit the function as a vaporization heat exchanger without any abnormal overheating due to burning even during inclination or acceleration / deceleration. That is, the vaporization heat exchanger 61 of the second embodiment is a vaporization heat exchanger suitable for mounting on a vehicle.

In the second embodiment, the header 63 having the partition plate 77 and the liquid fuel supply pipe 85 is
Because it is detachably attached to the heat exchange core 62,
When adjusting the diameter of the pipe outlet hole 86 of the liquid fuel supply pipe 85, the adjustment work can be performed by removing the header 63, which is very efficient.

In addition, the vaporizing heat exchanger 6 of the second embodiment
1 is easier to drill than the vaporizing heat exchanger 31 of the first embodiment. That is, in the second embodiment, the inside of the header 63 is divided into a plurality of small chambers 78 and the liquid fuel supply pipe 85 is provided.
Since the liquid fuel 76 is supplied from the pipe outlet hole 86 to each small room 78, one pipe outlet hole 86 may be provided for each small room 78. That is, the number of pipe outlet holes 86 is relatively small. On the other hand, in the first embodiment, the header outlet hole 41 is configured as a fixed aperture having a small diameter, and the number of the header outlet holes 41 is much larger than that of the pipe outlet holes 86. Therefore, when these exit holes 46 and 86 are fixed apertures having a small diameter, the pipe exit hole 86 can be made relatively large in diameter, so that the drilling process is easy. It is necessary to make the diameter very small compared with the pipe outlet hole 86, so that drilling is relatively difficult.

Although the description has been given above of the case where the liquid fuel is vaporized, the reforming of the fuel also requires steam, and the present invention is applied to a vaporizing heat exchanger for generating the steam. Can be. That is, the present invention can be applied to a vaporizing heat exchanger for liquid fuel such as methanol or water, or a mixture thereof. Further, the present invention can be applied not only to the vaporization heat exchanger of the fuel cell power generation system but also to other vaporization heat exchangers.

[0038]

As described above in detail with the embodiments of the present invention, the vaporizing heat exchanger of the first invention has a heat exchange core portion having a plurality of vaporizing channels provided in parallel. A header is provided on one end side, and the liquid supplied to the header is distributed from the header outlet hole to each vaporization flow path of the heat exchange core portion, and heated while flowing in each vaporization flow path to be vaporized. In the vaporizing heat exchanger for mounting the moving body configured, the header outlet hole provided for each vaporization flow path of the heat exchange core portion is a small-diameter outlet hole serving as a fixed throttle that increases the passage pressure loss. By keeping the internal pressure of the header high, the inside of the header is always filled with the liquid supplied to the header, and the liquid inside the header is supplied from each small-diameter header outlet hole to each vaporization flow path of the heat exchange core part. It is characterized by having comprised so that it may perform.

Therefore, according to the vaporizing heat exchanger of the first invention, since the inside of the header is always filled with the liquid,
When the vaporization heat exchanger is tilted with a moving body such as a vehicle,
Alternatively, even when the moving body accelerates or decelerates, the liquid level of the liquid in the header does not tilt. For this reason, the present evaporative heat exchanger does not have abnormal overheating due to squirting even at the time of inclination or acceleration / deceleration, and can exhibit the function as the evaporative heat exchanger.

Further, the vaporizing heat exchanger of the second invention has a header on one end side of a heat exchange core portion having a plurality of vaporizing flow paths provided in parallel, and the liquid supplied to the header is A vaporization heat exchanger for mounting on a moving body, configured to distribute from the header outlet hole to each vaporization flow path of the heat exchange core part, heat while flowing in each vaporization flow path, and vaporize, the header. A liquid supply pipe is provided at the top of the small room, with the interior divided by a partition plate and divided into multiple small rooms, and a pipe outlet hole for supplying liquid to each small room of the header is provided for each small room. In addition, by making the pipe outlet hole a small-diameter outlet hole that becomes a fixed throttle that increases the passage pressure loss, the internal pressure of the liquid supply pipe is kept high and the liquid inside the liquid supply pipe is supplied to the liquid supply pipe. And always fill with Characterized by being configured to supply a liquid inside the pipe from the pipe outlet holes of small diameter to the header of each cubicle.

Therefore, according to the vaporizing heat exchanger of the second invention, the inside of the header is divided by the partition plate into a plurality of small rooms, and the liquid supply pipe for supplying the liquid to these small rooms is provided. Since the inside is always filled with liquid, even when the vaporizing heat exchanger is tilted with a moving body such as a vehicle, or when the moving body is accelerated or decelerated, the liquid level of the liquid in each small room is inclined. Is small (the liquid level is inclined in each small room), and the liquid level of the liquid in the liquid supply pipe is not inclined. For this reason, the present evaporative heat exchanger does not have abnormal overheating due to squirting even at the time of inclination or acceleration / deceleration, and can exhibit the function as the evaporative heat exchanger.

Further, a vaporization heat exchanger according to a third aspect of the present invention is the vaporization heat exchanger according to the second aspect of the invention, wherein a header portion provided with a partition plate and a liquid supply pipe is detachably attached to the heat exchange core portion. It is characterized by the following.

Therefore, according to the vaporizing heat exchanger of the third invention, when adjusting the diameter of the pipe outlet hole of the liquid supply pipe, it is possible to remove the header portion and perform the adjusting operation, which is very efficient. It is a target.

Further, the vaporizing heat exchanger according to the fourth invention is characterized in that
In the vaporization heat exchanger according to the second or third aspect, the vaporization heat exchanger is a vaporization heat exchanger of a fuel reforming system in a fuel cell power generation system mounted on a moving body, and the liquid is a liquid fuel of a fuel cell. Or a liquid such as water or a mixture thereof.

Therefore, according to the vaporizing heat exchanger of the fourth invention, there is no abnormal overheating due to burning even during tilting or acceleration / deceleration, and the liquid fuel or water of the fuel cell, or a mixture thereof, etc. Since it can exhibit a function as a vaporization heat exchanger for vaporizing a liquid, it is suitable as a vaporization heat exchanger for fuel reforming system equipment in a fuel cell power generation system mounted on a moving body.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a vaporization heat exchanger according to Embodiment 1 of the present invention.

FIG. 2 is a view in the direction of arrow B in FIG. 1;

FIG. 3 is a sectional view of a vaporizing heat exchanger according to Embodiment 2 of the present invention.

FIG. 4 is a view taken along line CC of FIG. 3;

FIG. 5 is an explanatory diagram showing a state when the vaporizing heat exchanger is tilted.

FIG. 6 is an explanatory diagram showing a state at the time of acceleration / deceleration of the vaporization heat exchanger.

FIG. 7 is a cross-sectional view of a conventional vaporization heat exchanger.

FIG. 8 is a view in the direction of arrow A in FIG. 7;

FIG. 9 is an explanatory view showing a state when the vaporizing heat exchanger is tilted.

FIG. 10 is an explanatory diagram showing a state at the time of acceleration / deceleration of the vaporization heat exchanger.

[Explanation of symbols]

 31 vaporization heat exchanger 32 heat exchange core part 33 header 34 header 35 vaporization flow path 36 high temperature fluid flow path 37 fin 38 inlet piping 39 header upper surface 40 header lower surface 41 header outlet hole 42 header upper surface 43 header inlet hole 44 header lower surface 45 outlet Piping 46 Liquid fuel 61 Vaporization heat exchanger 62 Heat exchange core 63 Header 64 Header 65 Vaporization passage 66 High temperature fluid passage 67 Fin 68 Inlet piping 69 Header upper surface 70 Header lower surface 71 Header outlet hole 72 Header upper surface 73 Header inlet hole 74 Lower surface of header 75 Outlet piping 76 Liquid fuel 76a Liquid level 77 Partition plate 78 Small room 85 Liquid fuel supply pipe 86 Pipe outlet hole 87 Bolt 88 Mounting seat 90 Gasket

Continued on the front page (72) Inventor Tetsuya Yukawa 3000 Tana, Sagamihara-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd. (72) Inventor Takashi Eda 1-1-3 Otemachi, Chiyoda-ku, Tokyo Sumitomo Seimitsu Industry Co., Ltd. F-term (reference) 3L103 AA42 BB37 CC01 DD02 4G040 EA02 EA06 EB04 5H027 BA01

Claims (4)

[Claims] 1. A header is provided at one end of a heat exchange core portion having a plurality of vaporization channels provided in parallel, and liquid supplied to the header is supplied to each of the heat exchange core portions from a header outlet hole. A vaporizing heat exchanger for mounting on a moving body, which is configured to be distributed to the vaporizing flow paths and to be heated and vaporized while flowing in each vaporizing flow path, for each vaporizing flow path of the heat exchange core portion. Install the header exit hole
By having a small-diameter outlet hole that becomes a fixed throttle that increases the passage pressure loss, the internal pressure of the header is kept high so that the inside of the header is always filled with the liquid supplied to the header,
A vaporizing heat exchanger characterized in that the liquid inside the header is supplied from each small-diameter header outlet hole to each vaporizing flow path of the heat exchange core portion. 2. A heat exchange core portion having a plurality of vaporization channels provided in parallel, a header provided at one end of the heat exchange core portion, and a liquid supplied to the header is passed through a header outlet hole to each of the heat exchange core portions. This is a vaporizing heat exchanger for mounting on a moving body, which is configured to distribute to the vaporizing channels and heat while flowing in each vaporizing channel to vaporize. A liquid supply pipe, which is provided with a pipe outlet hole for supplying liquid to each small room of the header, is arranged at the top of each small room, and passes through the pipe outlet hole. By using a small-diameter outlet hole that becomes a fixed throttle that increases pressure loss,
The internal pressure of the liquid supply pipe is kept high so that the inside of the liquid supply pipe is always filled with the liquid supplied to the liquid supply pipe, and the liquid inside the liquid supply pipe is discharged from each small-diameter pipe outlet hole to each small chamber of the header. An evaporative heat exchanger, characterized in that it is configured to supply the heat to a heat exchanger. 3. The vaporization heat exchanger according to claim 2, wherein the header portion provided with the partition plate and the liquid supply pipe is detachably attached to the heat exchange core portion. vessel. 4. The vaporization heat exchanger according to claim 1, 2, or 3, wherein the vaporization heat exchanger is a vaporization heat exchanger of a fuel reforming system facility in a fuel cell power generation system mounted on a moving body, The liquid is a liquid fuel of a fuel cell, water, or a mixture thereof, wherein the liquid is a vaporized heat exchanger.