JPS6080093A - Heat exchanger - Google Patents

Abstract

PURPOSE:To permit to provided valve members, thermostat or the like, which are set in a heat exchanger, at an arbitrary position on the upper part of the heat exchanger by a method wherein fluid, gathered into the outlet path of the heat exchanger, cooling engine oil for motorcar, oil for torque converter of the like, is flowed out ot the outside of the heat exchanger through the side of an outlet path of fluid path closing the path on the way thereof. CONSTITUTION:A fluid path 11 is communicated with an inlet port path 13 as well as the outlet port path 14 and the fluid path 11a, located at the uppermost position of the main body 1 of the heat exchanger, is communicated with the outlet port path 14 but is not communicated with the inlet port path 13. When the temperature of the engine oil is low, a valve body 16 opens a communicating path 10c and the engine oil flows into a discharging path 10b from an introducing path 10a through the communicating path 10c. When the temperature of the engine oil, which flows through the discharging path 10b, becomes 100 deg.C or higher, a thermowax in a thermostat 9 expands and the valve body 16 closes the communicating path 10c. Then, the engine oil flows through respective fluid paths 11 from the inlet port path 13. The engine oil effects heat exchange with atmosphere around the main body 1 of the heat exchanger during flowing through respective fluid paths 11 and the high temperature of the engine oil becomes low temperature, thereafter, the engine oil flows into the outlet port path 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat exchanger, and is effective for use as a heat exchanger for cooling automobile engine oil, torque converter oil, etc., for example.

[Prior art]

Conventionally, as shown in Japanese Utility Model Application Publication No. 57-25258,
Pulp members, thermostats, etc. that allow fluid to flow into the heat exchanger or bypass the fluid to directly discharge the fluid without flowing into the heat exchanger are located at the upper part of the inlet passage or outlet passage. Its location was restricted to only Therefore, when attaching the heat exchanger to the vehicle body, the above-mentioned pulp member, thermostat, etc. may get in the way, and the degree of freedom in attachment is very small.

[Purpose of the invention]

In view of the above problems, the present invention makes it possible to install a means for determining whether or not to allow fluid to flow into the heat exchanger, such as a pulp member or a thermostat, at any (2) position above the heat exchanger. The purpose is to

〔Example〕

Next, an embodiment in which the present invention is used as a heat exchanger for cooling engine oil for automobiles will be described based on the drawings. 1st
The figure is a diagram showing the entire apparatus of this embodiment. In the figure, 1 is a heat exchanger main body, which consists of an upper plate 2, a lower plate 3, and fins 4, and an end plate 5 is arranged on the lowermost surface thereof. At both ends of this end plate 5 are angles 6.
7 is joined, and an angle 8 is also joined to the upper right surface of the heat exchanger main body 1. These angles 6.7.8 are used when attaching the heat exchanger main body 1 to the vehicle body, and are fixed to the vehicle body by inserting bolts into holes drilled in each angle 6.7.8. Further, a block 10 having a valve member and a thermostat 9 is installed on the upper left surface of the heat exchanger main body in the figure.

FIG. 2 is a sectional view showing the second part of FIG. 1 in detail, and a more detailed explanation will be given based on this figure. At both ends of the upper plate 20, upwardly directed convex portions 2a are formed, which are bowl-shaped protrusions, and similarly, downwardly directed convex portions 3a, which are bowl-shaped (3) protrusions, are formed on the lower plate 3.

The convex portion 2a and the convex portion 3a are joined facing each other, and a fluid passage 11 is formed between the convex portions at both ends. The pairs of upper and lower plates 3 and 4 joined in this manner are stacked one after another, and each set is joined with fins 4 interposed between each set to promote heat dissipation. The fluid passage 1
Inner fins 12 are disposed within the inner fin 1 in order to increase the flow resistance of the fluid and to improve the heat dissipation of the fluid.

Further, a through hole 2b is provided approximately at the center of the convex portions 2a, 3a.

3b is bored and the convex portions 2 are joined facing each other.
an inlet passage 13 and an outlet passage 14 (not shown in FIG. 2) are formed by a and 3a.

In this way, the fluid passage 11 communicates with the inlet passage 13 and the outlet passage 14, and the fluid passage 11a located at the top of the heat exchanger body 1 communicates with the outlet passage 14. It is blocked off from the inlet passage 13. In other words,
Each set of upper plate 3 and lower plate 4 is joined only at its outer edge, but the set of upper plate 3 and lower (4) plate 4 located at the top is joined only at the outer edge, as well as the inlet passage 13. The fluid passage 11a and the inlet passage 13 are joined at a point 14 near the inlet passage 13 between the fluid passage 11a and the outlet passage 14, and communication between the fluid passage 11a and the inlet passage 13 is cut off. The upper and lower plates 3.4, end plates 5, fins 4, and inner fins 12 are made of aluminum, and both sides of the upper and lower plates 3, 4 and end plates 5 are clad with brazing material, and each joint is made by vacuum brazing. This is done by attaching.

A block 10 made of aluminum is arranged in the upper left part of the heat exchanger main body 1 in the figure, and this block 10 is formed with an introduction passage 10a and a discharge passage 10b. One end of the introduction passage 10a is inserted into the inlet passage 13, and an introduction pipe 30 is soldered to the other open end. Furthermore, a communication hole 21 is opened in the upper plate 2 at the top, and by connecting the communication hole 21 and the first end of the discharge passage 10b, the discharge passage R10b and the fluid passage 11a located at the top are connected. are in communication.

A discharge vibrator 3 (5) is provided at the other open end of this discharge passage 10b. 1 are joined by brazing.

The introduction passage 10a and the discharge passage 10b communicate with each other within the block 10 through a communication passage 10c. A thermostat 9 containing thermowax is screwed onto the block 10, and a valve body 16 is disposed on the thermostat 9 via a spring 17. This valve body 16 is normally positioned in the discharge passage 10b by the tension of the spring 17, but when the fluid flowing in the discharge passage 10b becomes high temperature (approximately 100°C in this embodiment), the thermowax in the thermostat 9 Expands and valve body 16
moves toward the communication path IQc against the tensile force of the spring 17, closing this communication path 10c.

FIG. 3 is a plan view of the portion 2 in FIG. 1, and FIG. 2 corresponds to a sectional view taken along the line AA in FIG.

Next, the operation of this embodiment will be explained.

Engine oil flowing out from a vehicle engine (not shown) flows into the block 10 through the introduction pipe 14. Immediately after the engine starts, the engine oil (6) is at a low temperature, so the valve body 16 is connected to the connecting path 10C.
The engine oil flows from the introduction passage 10a through the communication passage 10C and the exhaust passage 10b to the exhaust pipe 1.
Return to the engine from 5. At this time, the engine oil that has flowed into the introduction passage 10a may flow from the inlet passage 13 into each fluid passage ll;
Since inner fins 12 are arranged therein and the flow resistance is large, the fluid does not flow into the fluid passage 11, but flows to the discharge passage tab through the communication path 10C, which has a small flow resistance.

After that, as the engine continues to be operated, the engine temperature rises and the engine oil temperature also rises. The engine oil flowing through the exhaust passage tob is 100%
℃ or higher, the thermowax inside the thermostat 9 expands, and the valve body 16 closes the communication path 10C (second
state shown by the two-dot chain line in the figure). Then, the high temperature engine oil flowing from the introduction pipe 30 flows through the introduction passage 10a to the inlet passage 1? &13, and each (
7) Flows through the fluid passage 11. While flowing through each fluid passage 11, heat is exchanged with the atmosphere around the heat exchanger main body 1, and the high temperature engine oil becomes low temperature and flows into the outlet passage 14. The low-temperature engine oil that has flowed into the outlet passage 14 flows toward the inlet passage 13 in the fluid passage 11a located at the top, flows into the discharge passage 10b through the communication hole 21, and passes through the discharge pipe 31. Back to the engine again.

The first embodiment of the present invention has been described above, and now the second embodiment will be described.

FIG. 4 shows this embodiment, and like FIG. 2, it corresponds to a sectional view of two parts of FIG. 1. In the first embodiment, only the fluid passage 10a located at the top is cut off from the inlet passage 13, but as shown in FIG. There is. The first stage fluid passage 10a and the second stage fluid passage 10b are formed by a hole 31 formed in the lower plate 3 forming the first stage fluid passage 10a and a second stage fluid passage tab. It communicates with the hole 22 formed in the upper plate 2 having the shape (8) by joining the hole 22 thereto. The rest of the configuration is the same as that of the first embodiment, but the low temperature engine oil that has flowed into the outlet passage 14 is transferred to the first and second stage fluid passages 10a and 10.
b is connected to the inlet passage 13 (flows toward all, and is connected to the discharge passage 10 through the communication hole 21 that opens to the first stage fluid passage 10a).
flows into b. Other operations are the same as in the first embodiment.

〔Effect of the invention〕

If the heat exchanger of the present invention is used in the birch described above, the fluid collected in the outlet passage will flow out of the heat exchanger through the outlet passage side of the fluid passage closed midway through the passage. Fluid can be discharged from any part of the passage to the outside of the heat exchanger, and means for determining whether or not to allow fluid to flow into the heat exchanger can be installed at any position above the heat exchanger. Therefore, the degree of freedom in mounting the heat exchanger can be increased.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is a partial cross-sectional view (9) of the second part of FIG. 1, and FIG. The plan view of the second part of the figure and FIG. 4 show a second embodiment of the present invention, and are views corresponding to the partial cross-sectional view of the second part of FIG. 2... Upper plate, 3... Lower plate, 2a, 3a
... Bowl-shaped protrusion, 10a...Introduction passage (corresponding to the upstream point), 10b...Discharge passage (corresponding to the downstream point), 1
DESCRIPTION OF SYMBOLS 1... Fluid passage, lla... Fluid passage located at the top, 13... Inlet passage, 14... Outlet passage, 16
...valve body. Representative Patent Attorney: Takashi Okabe (10) 1. Indication of the case: 1988 Patent Application No. 188133 2. Name of the invention Heat exchanger 3. Relationship with the case of person who undergoes renovation Patent applicant 1-chome Showacho, Kariya City, Aichi Prefecture Address 1 (426) Nippondenso Co., Ltd. Representative Toda Madodai 4th generation Masato 〒448 Ai (2) 1-1-5 Showa-cho, Ichiyoku-shi Date of amendment order Sent date January 31, 1959

Claims (1)

[Claims] A fluid passage is formed by stacking an upper plate and a lower plate having bowl-shaped protrusions at both ends, and by stacking a large number of upper plates and lower plates, the passage is formed by the bowl-shaped protrusions. In the stacked heat exchanger to be formed, the passages include an inlet passage for distributing the fluid flowing into the heat exchanger and the fluid flowing through each of the fluid passages, and a collection of fluid flowing out from each of the fluid passages. and an outlet passageway for connecting the inlet passageway and the outlet passageway, at least the fluid passageway located at the uppermost part of the fluid passageway communicating the inlet passageway and the outlet passageway is closed in the middle of the passageway, and the fluid collected in the outlet passageway is The closed fluid passage flows out of the heat exchanger through the outlet passage side, and communicates a point upstream from the inlet passage with a point downstream from the outlet passage side of the closed fluid passage, and the upstream point and (1) A heat exchanger comprising: means for opening and closing communication at a downstream point.