JP3687294B2 - Fin pipe turbulence generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fin pipe turbulent flow forming apparatus in which a baffle plate in which a plurality of cut-and-raised portions are formed is mounted in a space inside a fin pipe such as a fin pipe constituting a part of a heat exchanger of a water heater.
[0002]
[Prior art]
FIG. 10 shows an example (conventional example 1) of a fin pipe turbulent flow forming device that constitutes a part of a heat exchanger of a conventional water heater, in which (A) is a left side view and (B) is a partially sectional front view. FIG. FIG. 11 is a cross-sectional view showing a state in which the turbulent flow forming device shown in FIG.
The turbulent flow forming apparatus shown in FIG. 10 and FIG. 11 is designed to prevent the boiling noise caused by local boiling of hot water in the fin pipe 12 of the heat exchanger and increase the thermal efficiency. Thus, a spring-like turbulent coil 11 and a twisted plate 10 in which a copper plate is twisted are inserted.
The assembly state of the twisted plate 10 and the turbulent coil 11 in the turbulent flow forming apparatus of the conventional example 1 will be described with reference to FIG. 10. A slit 10a is formed at the longitudinal end of the twisted plate 10, and the slit 10a. The torsion plate 10 is fixed by caulking to the end of the turbulent coil 11, and thereby the rotation of the torsion plate 10 is prevented.
FIG. 12 shows another example (conventional example 2) of a conventional fin pipe turbulent flow forming device. In this case, the diameter of the end portion 10b of the twisted plate 10 is related to the turbulent coil 11, The dimension W of the end portion 10b of the torsion plate 10 is accurately managed so as to have a tight fit.
Furthermore, FIG. 13 shows still another example (conventional example 3) of the conventional fin pipe turbulent flow forming apparatus. In this case, the turbulent coil which is indispensable in the conventional examples 1 and 2 is used. As shown in the figure, the baffle plate 13 has a plurality of cut-and-raised portions that are cut and raised to rise at an angle of 90 degrees with respect to the water flow direction. 14 was formed, and the baffle plate 13 was mounted so as to fit in the space of the fin pipe, thereby reducing the number of parts.
[0003]
[Problems to be solved by the invention]
However, in the case of the above-described conventional examples 1 and 2, two types of parts, the torsion plate 10 and the turbulent coil 11, are indispensable as constituent parts, and there is a disadvantage that it takes man-hours and costs in manufacturing.
In particular, in the case of the conventional example 1 shown in FIGS. 10 and 11, there is a problem that rotational vibration is generated in the torsion plate 10 when the hot water heater is used because the backlash of the caulking portion is large, which causes deformation wear on the torsion plate 10. As a result of the occurrence of S, there is a disadvantage that a part 10c of the outer peripheral portion of the twisted plate 10 repeatedly contacts the inner wall surface of the fin pipe 12 and the contact portion is scraped off.
In the case of the conventional example 2 shown in FIG. 12, the dimension W of the end 10b of the torsion plate 10 needs to be strictly controlled so as to be an interference fit. For example, using a rolled strip material or the like There is a problem that the desired twisted plate 10 cannot be obtained simply and at low cost.
Further, in the case of the conventional example 3 shown in FIG. 13, although the reduction of the number of parts has been achieved, the water flow is stagnant at the rear side of the cut and raised portion 14 in the cut and raised shape of the baffle plate 13 of the same example. Not only can this cause local boiling, but the cut-and-raised portion 14 is raised at an angle of 90 degrees with respect to the direction of the water flow. There was an inconvenience of becoming larger.
[0004]
Therefore, the present invention eliminates the problems of the conventional fin pipe turbulent flow forming apparatus, uses a roll-wrapped strip material, cuts it to an appropriate length, and sets a predetermined angle with respect to the water flow direction. It is possible to eliminate the cause of local boiling by efficiently making the flowing water flow turbulent by providing multiple cut-and-raised parts that can moderately reduce the resistance of the water flow. It is an object of the present invention to provide a fin pipe turbulent flow forming device that can reduce the man-hours and costs.
[0005]
[Means for Solving the Problems]
To achieve the above object, the turbulent flow forming apparatus fin pipe of the present invention is a turbulent flow forming apparatus fin pipe obtained by mounting the baffle plate to the inner space of the full Inpaipu, in the longitudinal direction of the bar Tsu full plate It is inclined with respect to the water flow direction formed so as to be opposite alternately a plurality of cut-and-raised portion that has a reference plane lanced direction baffle plates of each cut-and-raised portion so as to form at predetermined intervals rise In addition, the baffle plate is formed so that both end portions thereof are wider than the central portion and an opening is formed in the vicinity of both end portions, and the baffle plate is tightly fitted to the inner wall surface of the fin pipe by the both end portions. In addition, the opening provides a resilient force when fitted into the both ends, and the water flow is unlikely to stagnate near the entrance and exit of the fin pipe. It is a feature to become as have configured.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an example of an embodiment of the present invention. FIG. 1 is a partially enlarged front view of the turbulent flow forming device, and FIG. 2 is a plan view of the same. FIG. 3 is an enlarged view showing a state seen from the direction A of FIG.
[0007]
In FIG. 1, a baffle plate 1 constituting a turbulent flow forming device is formed of, for example, a strip-like piece obtained by cutting a rolled strip material into an appropriate length, and its longitudinal direction has an angle of about 45 degrees with respect to the water flow direction. A plurality of inclined cut and raised portions 2 are formed, and each cut and raised portion 2 is formed so as to be alternately opposite to each other with the baffle plate 1 as a reference plane as shown in FIG. . The width H of the baffle plate 1 is set to such a dimension that it can be fitted into the fin pipe. Each of the raised portions 2 is bent by bending or the like so that the baffle plate 1 is alternately opposite to the L-shaped cut 1b formed by punching or the like at a position indicated by a broken line 1a. Therefore, the triangular openings 3 are simultaneously formed by the formation of the cut and raised portions 2. Needless to say, the width h in the height direction of the cut-and-raised portion 2 (the width in the height direction of the triangular opening 3) is smaller than the width H of the baffle plate 1.
The desired function of the turbulent flow forming device is achieved by fitting the baffle plate 1 having the above configuration into the fin pipe with a tight fit. This will be explained with reference to FIG. 1. When the water flow flowing through the fin pipe indicated by the symbol M hits the cut-and-raised part 2 at an angle of about 45 degrees with respect to the water flow direction on one side of the baffle plate 1 as a boundary surface, As shown by the solid line arrow m along the inclination of the raising part 2, when the other one side hits the raising part 2 at an angle of about 45 degrees with respect to the water flow direction, the inclination of the raising part 2 And flows in the outer circumferential direction as indicated by a broken-line arrow n. In this way, the water flow flowing in the fin pipe always flows outward due to the presence of the cut-and-raised portion 2 provided in the baffle plate 1, so that turbulent flow is efficiently formed and stirred, thereby suppressing local boiling. And the thermal efficiency is increased. In addition, the flow rate ratio between the can body side and the bypass side of a water heater or the like is also increased or decreased in the number of the cut-and-raised portions 2, and the bending angle of the cut-and-raised portions 2 (in this first example, as shown in FIG. The angle of the cut-and-raised portion 2 can be easily adjusted by changing the resistance depending on the setting of, for example, 105 degrees. Further, the baffle plate 1 has a simple configuration in which, for example, a rolled strip material is cut into a predetermined size, and the cut-and-raised portion 2 having the above-described configuration is provided thereon. Cost can also be reduced. A single baffle plate alone can be expected to have a sufficient effect as a turbulent flow forming device, but it goes without saying that a more effective effect can be expected by combining this with a known turbulent coil.
[0008]
Next, a second example of the embodiment of the invention will be described with reference to FIGS. 4A and 4B show a main part of the baffle plate 1, wherein FIG. 4A is a partially enlarged front view, and FIG. 4B is a partially enlarged plan view. FIG. 5 is a view of FIG. 4A viewed from the A direction. FIG. 6 is a schematic diagram for explaining the turbulent flow effect. FIG. 6A shows a case where the second example is applied, and FIG. 6B shows a case where the second example is not applied.
This second example also has the same basic configuration as the first example, but in this second example, a particularly different configuration compared to the first example is formed at the same time by forming each cut-and-raised portion 2. Apart from the triangular opening 3, the triangular opening 4 is newly formed before and after each of the cut and raised portions 2.
By adopting such a configuration, as shown in FIG. 6A, a part of the water flow (indicated by reference numeral m <b> 1) out of the water flow flowing in the fin pipe is the baffle plate 1. When it hits the cut-and-raised part 2 from one side (surface side) as follows, it flows outward along the inclined surface of this cut-and-raised part 2 and swivels into the fiffin pipe. It passes through the newly provided opening 4 before and after the cut-and-raised part 2 (indicated by reference numeral m2 in the figure) and flows to the other side (back side) and at the same time the other side (back side) of the baffle plate 1 ) (Which is indicated by reference numeral m3 in the figure) also flows through the opening 4 and flows to one side (front side). In short, the water flow does not stagnate before and after the cut-and-raised portion 2 and is surely turbulent and has a stirring effect, thereby avoiding the cause of local boiling. In addition, since the openings 4 are newly provided before and after each cut-and-raised portion 2 of the baffle plate 1, even if the baffle plate 1 is inserted from either the left or right side of the fin pipe, the effect of turbulent water flow changes. Therefore, man-hours and costs can be reduced when manufacturing a turbulent flow forming device. In this regard, if the opening 4 as described above does not exist before and after each cut-and-raised portion 2, as shown in FIG. 6B, the water flow is stagnant at the rear portion of the cut-and-raised portion 2 (in the figure). , And a vortex is generated, which may cause local boiling. A single baffle plate alone can be expected to have a sufficient effect as a turbulent flow forming device, but it goes without saying that a greater effect can be expected by combining this with a known turbulent coil.
[0009]
Next, a third example of the embodiment of the present invention will be described with reference to FIGS. FIG. 7 shows a main part of the baffle plate 1, (A) is a partially enlarged front view, and (B) is a partially enlarged plan view. FIG. 8 is a view of FIG. 7A viewed from the A direction. Further, FIG. 9 is a partial cross-sectional front view of the turbulent flow forming device in which the baffle plate 1 is mounted in the inner space of the fin pipe.
The third example also has a basic configuration in common with the first example, but the configuration that is particularly different from the first example is that the end portions 5 of the baffle plate 1 are wider than the central portion, and the baffle plate When 1 is inserted into the fin pipe and mounted, the both ends 5 can be fitted into the fin pipe.
By adopting such a configuration, it is only necessary to manage the size of the interference fit only for the both end portions 5, and thus the productivity of the baffle plate 1 is improved. Further, as shown in FIG. 9, the water flow flowing through the fin pipe 7 indicated by the symbol M in the figure is cut and raised at an angle of about 45 degrees with respect to the water flow direction on one side (surface side) with the baffle plate 1 as a reference surface. When it hits the portion 2, it flows to the outer periphery along the inclined surface of the cut-and-raised portion 2, but the central portion of the baffle plate 1 is narrower than the both end portions 5, and there is a gap K between the inner wall of the fin pipe 7. Therefore, the water flow (indicated by reference numeral m5 in the figure) that flows to the outer periphery along the inclination of the cut and raised portion 2 flows as a swirling flow from the gap K to the back side of the baffle plate 1. In this way, the water flow flowing in the fin pipe 7 always flows outwardly and flows efficiently due to the presence of the cut-and-raised portion 2 provided in the baffle plate 1, and the turbulent flow is efficiently formed. By newly providing it, it surely flows as a swirling flow toward the back side of the baffle plate 1, so that the swirling effect of the water flow becomes very high, local boiling is further suppressed, and the thermal efficiency is remarkably increased. The openings 6 formed in the vicinity of both end portions 5 are provided to give elasticity of the both end portions 5 when the both end portions 5 are tightly fitted in the fin pipe 7. However, there is an effect of making it difficult to flow in the vicinity of the entrance and exit of the fin pipe 7. Further, as in the first example, the flow rate ratio between the can body side and the bypass side of the hot water heater or the like is also the number of the cut-and-raised portions 2, the bending angle of the cut-and-raised portions 2 (the cut-raised portion with respect to the baffle plate 1 as shown in FIG. 8). The baffle plate 1 cuts the rolled strip material into a predetermined size, and a plurality of cut-and-raised portions 2 having a predetermined configuration are provided on the baffle plate 1. Since the configuration is simple, productivity is good and costs can be reduced. A single baffle plate alone can be expected to have a sufficient effect as a turbulent flow forming device, but it goes without saying that a more effective effect can be expected by combining this with a known turbulent coil.
[0010]
As described above, in all the embodiments described above, the inclination angle of the cut-and-raised portion 2 is set to approximately 45 degrees with respect to the water flow direction. However, the present invention is not limited to this. May be changed as appropriate.
[0011]
【The invention's effect】
The present invention consists of the above configuration, according to the turbulent flow forming apparatus fin pipe according to claim 1, a turbulent flow forming apparatus fin pipe obtained by mounting the baffle plate to the inner space of the off Inpaipu, Ba Tsu alternately inverted as a reference surface a cut and raised direction baffle plates of each cut-and-raised portion with a plurality of cut-and-raised portion which has rise is inclined with respect to the water flow direction in the longitudinal direction of the full plate formed at predetermined intervals The baffle plate is formed so that both ends are wider than the central part and an opening is formed in the vicinity of both ends, and the baffle plate fits closely to the inner wall surface of the fin pipe by the both ends. In addition, it provides a resilient force when fitted into the both ends by the opening and near the entrance / exit of the fin pipe So are configured such that the water flow is less likely to flow stagnation,
Since the size of the interference fit needs to be managed only for the both ends, the productivity of the baffle plate is improved.
In addition, when the water flow flowing through the fin pipe hits the cut-and-raised part on one side, it flows to the outer circumference along the slope of this cut-and-raised part, but the width of the central part of the baffle plate is narrower than its both ends and the fin pipe Since a gap is formed between the inner wall and the inner wall, the water flow that flows to the outer periphery along the inclination of the cut and raised portion flows as a swirling flow from the gap to the back side of the baffle plate. As described above, the water flow flowing in the fin pipe always flows outward due to the presence of the cut-and-raised portion provided in the baffle plate, so that not only the turbulent flow is efficiently formed but also the back surface of the baffle plate from the gap. Since it flows as a swirling flow to the side, local boiling is further suppressed, and the thermal efficiency is remarkably increased.
In addition, the flow rate ratio between the can body side and the bypass side of a water heater can be easily adjusted by selecting the number of cuts and raising and the bending angle of the cut and raised part with respect to the baffle plate surface, and the baffle plate is rolled. The strip material is cut into a predetermined size, and a cut-and-raised portion is provided on the strip material, so that the productivity is good and the cost can be reduced.
The openings formed in the vicinity of both ends are provided to give elasticity of both ends when the both ends are tightly fitted in the fin pipe. There is an effect to make it difficult to stay.
[Brief description of the drawings]
FIG. 1 is a partially enlarged front view of a turbulent flow forming apparatus showing a first example of an embodiment of the present invention.
FIG. 2 is a partially enlarged plan view of a turbulent flow forming apparatus showing a first example of an embodiment of the present invention.
FIG. 3 is a view of the turbulent flow forming device of FIG. 1 as viewed from the A direction.
4A and 4B show a second example of an embodiment of the present invention, in which FIG. 4A is a partially enlarged front view, and FIG. 4B is a partially enlarged plan view.
5 is a view of (A) of FIG. 4 as viewed from the direction A. FIG.
6A and 6B are schematic diagrams for explaining the turbulent flow effect according to the second example of the embodiment of the present invention, in which FIG. 6A shows a case where the second example is applied, and FIG. The case where the example of 2 is not applied is shown.
7A and 7B show a third example of an embodiment of the present invention, in which FIG. 7A is a partially enlarged front view, and FIG. 7B is a partially enlarged plan view.
FIG. 8 is a view of (A) of FIG. 7 as viewed from the A direction.
FIG. 9 is a partially enlarged cross-sectional view in which a turbulent flow forming device according to a third example of an embodiment of the present invention is mounted in a fin pipe.
FIGS. 10A and 10B show an example (conventional example 1) of a conventional fin pipe turbulent flow forming device, in which FIG. 10A is a left side view and FIG.
11 is a cross-sectional view showing a state in which the turbulent flow forming device shown in FIG. 10 is mounted in the fin pipe internal space.
FIG. 12 is a partial sectional front view showing another example (conventional example 2) of a conventional fin pipe turbulent flow forming device.
FIG. 13 is a partial perspective view showing still another example (conventional example 3) of a conventional fin pipe turbulent flow forming device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Baffle plate 2 Cut and raised part 3 Open hole 4 Open hole 5 Both ends 6 Open hole 7 Fin pipe

Claims (1)

A turbulent flow forming apparatus fin pipe obtained by mounting the baffle plate to the inner space of the fin pipe, a plurality of cut-and-raised portion a predetermined interval in the longitudinal direction of the bar Tsu full plates were rise is inclined with respect to the water flow direction with the direction cutting and bending of the cut-and-raised portion so as to form at a form such that the opposite alternately as a reference surface a baffle plate, also baffle plate is formed wider than the both end portions to the central portion An opening is formed in the vicinity of both ends, and the baffle plate is configured to be fitted into the inner wall surface of the fin pipe by the both ends, and the elastic force is provided when the opening is fitted to both ends by the opening. turbulent flow forming instrumentation fin pipe, characterized in that are configured to hardly flow stagnation water flow in the vicinity of the entrance of the fin pipe while .

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