JP2516401Y2 - Heat exchange core of heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a heat exchange core of a laminated heat exchanger formed by stacking dish plates.

(Prior Art) A heat exchange core of a laminated heat exchanger is, for example, Shoukai 62-4558.
That is what is described as a heat exchange element in JP-A-5. A plurality of layered cavities formed by stacking dish-shaped plates with raised flanges on the periphery are divided into two sets of alternate layers, and a fluid inflow passage that penetrates the other set of vacant chambers, a fluid An outflow passage is provided to allow the first and second fluids to flow in alternate layers. In this example, as disclosed in FIG. 3 or FIG. 4 of the above publication, four openings are provided on the same circumference of the bottom wall of the plate, and a flange is raised in two openings facing each other. 90
The fluid inflow passage and the fluid outflow passage are formed by shifting and overlapping. As in this example, generally, the fluid inflow path and the outflow path are cylindrical hollow portions having the same diameter and communicating the respective layers of the vacant chamber.

(Problems to be Solved by the Invention) In the conventional heat exchange core as described above, the first and second heat exchange cores are provided.
The fluid channels have almost the same shape and the same volume, but 2
There is a case where it is desired to particularly reduce the pressure loss (fluid resistance) of only one of the seed fluids. For example, in an oil cooler for an internal combustion engine, when the oil is the first fluid and the cooling water is the second fluid, it is often the case that it is desired to reduce the pressure loss of the oil in the oil cooler as much as possible. Such pressure loss occurs in the flat first fluid chamber and the first inflow passage or the first outflow passage in the heat exchange core, but if the flatness of the first fluid chamber is reduced, the heat exchange surface (bottom wall of the plate ) Between them will increase the efficiency of heat exchange, and the oil cooler will become stronger. Therefore, it is advisable to expand the inflow passage and the outflow passage of the first fluid, but if the whole of these is expanded, the heat exchange surface is reduced by that amount, and the heat exchange rate is significantly reduced, which is not preferable.

(Means for Solving the Problems) In the heat exchange core of the present invention, the laminated empty chambers formed in the plate group in which the dish-shaped plates are superposed are alternately set as the first fluid chamber and the second fluid chamber, respectively. The first inflow passage,
The first outflow passage and the second inflow passage / the second outflow passage are communicated with each other, and the plurality of first fluid chambers in the upper layer portion or the lower layer portion of the plate group are communicated with the first bypass passage, and the upper and lower ends of the plate group are connected to the upper end. A plate and a lower end plate are provided, an opening that faces the first inflow passage, the second inflow passage, and the second outflow passage is provided in the lower end plate, and an opening that faces the first outflow passage is provided in the upper end plate, and The heat exchange core is provided with an opening that faces the first bypass passage in either the upper or lower end plate. The selection of whether the position where the first bypass flow path is provided is on the inflow side or the outflow side of the heat exchange core and the number of layers that allow the first fluid chamber to communicate with each other in the first bypass flow path are designed and determined according to the required specifications.

(Operation) In general, the heat exchange core of the heat exchanger receives the first fluid from the opening of the lower end plate into the first inflow passage, sequentially inflows into the first fluid chambers in parallel, and sequentially in the first outflow passage. The first fluid is collected and allowed to flow out from the opening of the upper end plate provided facing the upper end of the first outflow passage. The second fluid is received from the opening of the lower end plate into the second inflow passage and sequentially flows in parallel into the respective second fluid chambers, is sequentially collected in the second outflow passage, and is provided so as to face the lower end of the second outflow passage. Through the opening in the bottom plate.
In this case, the upstream portion of the first inflow passage or the downstream portion of the first outflow passage is a passage before or after the fluid is dispersed in each fluid chamber, and the flow rate in this portion is large. Since the heat exchange core of the present invention is provided with the bypass passage for the first fluid in any of the portions where the flow rate is large, a part of the large flow rate is shared and the heat exchange core flows out from the opening of the end plate facing the bypass. As a result, the resistance of the portion having the largest fluid resistance and the largest fluid resistance is reduced.

(Example) FIGS. 1 to 3 show a heat exchange core of the present invention. The heat exchange core 1 is formed by stacking plates 2, 3, and 4 to form a plate group 5, and an upper end plate 6 is fixed to the upper end and a lower end plate 7 is fixed to the lower end. An oil inflow chamber is provided below the heat exchange core 1.
An annular cover 8 which is divided into 8a, a water inflow chamber 8b, and a water outflow chamber 8c is provided, and an annular oil outflow chamber 9 having an outflow hole 9a is provided in an upper portion to form a heat exchanger 10. Heat exchanger
Reference numeral 10 is used as an oil cooler for an internal combustion engine, and the first fluid is oil and the second fluid is water.

The plate group 5 is formed by alternately stacking the lower layer portion of the plate 2 and the upper layer portion of the plate 3 and the plate 4. As shown in FIGS. 4 and 5, the plate 2 has a flange 13 at the outer peripheral edge of a circular bottom wall 12 having a central opening 11 and a flange 14 at the outer peripheral edge of the central opening 11 so as to be concentric with the central opening. On the circumference of 90
Four openings 15 are provided at a pitch, and a flange 16 is raised in two of the openings 15 facing each other. As shown in FIGS. 6 and 7, the plate 3 is the plate 2 provided with four small openings 17 on another concentric circle at 90 ° pitch. Further, the plate 4 has a flange 18 raised on the periphery of the small opening 17 of the plate 3 as shown in FIGS. The plates 2, 3, 4 are plates 2, 2 ... 2, 2, 3, 4, 3, 4,
In the order of…, they are overlapped by shifting by 90 ° in the circumferential direction. In this way, a layered empty space 19 is formed between the plates, and two flanges 16 alternately connect the empty spaces 19, and the inflow passages 2 shown in FIG.
0, the first outflow passage 21 and the second inflow passage 22 shown in FIG.
The second outflow passage 23 is formed. Thus, the vacant chamber 19 is divided into a first fluid chamber 19a and a second fluid chamber 19b. Plate group 5
The upper layer part is plate 3, plate 4 on plate 2
As shown in FIG. 3, the small openings 17 of the plate 3 and the plate 4 and the flange of the plate 4 are alternately stacked.
A first bypass passage 24 is formed at 18, and the first fluid chamber 19a in the upper layer portion communicates with the first bypass passage 24.

The lower end plate 7 has a first inlet 25, a second inlet 26 and a second outlet 26.
27 are provided at positions facing the first inflow passage 20, the second inflow passage 22, and the second outflow passage 23, respectively, and communicate with the oil inflow chamber 8a, the water inflow chamber 8a, and the water outflow chamber 8c of the cover 8, respectively.
The oil inflow chamber 8a receives oil from the engine side, and the water inflow chamber 8b and the water outflow chamber 8c are designed so that cooling water can flow in and out through the pipes 8e and 8f.

The upper end plate 6 is provided with a first outflow port 28 at a position facing the first outflow passage 21, and a bypass port 29 is provided at a position facing two of the four first bypass passages 24. The first outflow port 28 and the bypass port 29 communicate with the inside of the oil outflow chamber 9.

The heat exchanger 10 has a cover 8 attached to an engine block (not shown), an oil filter (not shown) is placed on the oil outflow chamber 9, and a hollow bolt (not shown) penetrating the central opening 11 is used. The heat exchanger 10 is sandwiched between and the oil filter is mounted by tightening it on the engine block. The hollow portion of the hollow bolt serves as a return path for the oil that exits the heat exchanger 10 and passes through the oil filter to the engine. Further, the heat exchanger using the heat exchange core of the present invention may be one in which the outlet of the oil outflow chamber communicates directly with the hollow portion of the hollow bolt and the oil filter is not overlapped on the upper portion. The heat exchanger has a cover having an inflow chamber and a water outflow chamber attached to the upper surface of the heat exchange core 1,
The cooling water may be allowed to flow in and out from the upper surface of the heat exchange core 1.

Replace with the combination of plates 3 and 4 of plate group 5
Plate 33 shown in Figures 10 and 11 and plate shown in Figures 12 and 13
34 combinations may be used. The plate 33 has a flange 38 on the periphery of the small opening 17 of the plate 3 and the other flanges 13, 1.
It was raised in the opposite direction of 4, 16. Further, the plate 34 is formed by omitting the flange 18 around the small opening 17 of the plate 4. The first bypass passage 24 is formed in the same manner as in the above embodiment by alternately stacking the plates 33 and 34.

In this heat exchange core 1, the first fluid, that is, the oil is the first
The flow enters the inflow passage 20, sequentially flows in parallel into each first fluid chamber 19a, and sequentially gathers in the first outflow passage 21 to increase the flow rate. Since a part of the collected oil flows separately in the first bypass passage 24, the flow load on the downstream portion of the first outflow passage where the flow rate is large is reduced and the fluid resistance is reduced.

(Effect of the Invention) In the heat exchange core of the present invention, the bypass is provided only in the inflow part or the outflow part where the flow rate of the first fluid is large.
While suppressing the decrease in heat exchange amount due to the decrease in heat transfer area,
It is possible to effectively prevent an increase in pressure loss, and to obtain a heat exchanger having required characteristics by a simple means without causing a problem such as an increase in size.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first inflow passage and a first outflow passage of the embodiment, FIG. 2 is a sectional view showing a second inflow passage and a second outflow passage of the embodiment, and FIG. It is sectional drawing which shows 1 bypass passage. 4 is a plan view of the first plate. FIG. 5 is a cross-sectional view taken along the line AA of FIG. 6, FIG. 6 is a plan view of the second plate, FIG. 7 is a cross-sectional view taken along the line BB, and FIG. 3 is a plan view of the plate of FIG. 3, FIG. 9 is a sectional view taken along the line CC, and FIG.
FIG. 11 is a plan view of the plate of FIG.
The drawing is a plan view of the fifth plate, and FIG. 13 is a sectional view taken along line EE thereof. 2,3,4,33,34 …… Plate 5 …… Plate group, 6 …… Top plate 7 …… Bottom plate, 12 …… Bottom wall 13,14,16,18,38 …… Flange 15 …… Opening , 17 ... Small opening 19a ... First fluid chamber, 19b ... Second fluid chamber 20 ... First inflow passage, 21 ... First outflow passage 22 ... Second inflow passage, 23 ... Second outflow Passage 24 …… First bypass passage

Claims (1)

(57) [Scope of utility model registration request] 1. A first fluid chamber 19a and a second fluid chamber, each having a plurality of layered cavities formed by a plate group 5 formed by stacking dish-shaped plates having flanges on the periphery of a bottom wall. 19b, each first fluid chamber penetrating each second fluid chamber 19b
A first inflow passage 20 and a first outflow passage 21 communicating with 19a, and a second inflow passage 22 and a second outflow passage 23 penetrating each first fluid chamber 19a and communicating with each second fluid chamber 19b are provided. Further, a part of the plurality of first fluid chambers 19a in the upper layer portion or the lower layer portion of the plate group 5 is made to communicate with each other, and a first bypass passage 24 penetrating a second fluid chamber 19b between the first fluid chambers 19a is formed. The upper end plate 6 and the lower end plate 7 are provided on the upper and lower ends of the plate group 5, respectively.
Are fixed to each other, and the lower plate 7 is provided with openings facing the first inflow passage 20, the second inflow passage 22 and the second outflow passage 23,
A heat exchange core of a heat exchanger, wherein an upper end plate 6 is provided with an opening facing the first outflow passage 21, and an opening facing the first bypass passage 24 is provided in the upper end plate 6 or the lower end plate 7.