JPH0525172U - Heat exchanger fin - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to improve the heat efficiency of heat exchangers used in water heaters, bathtubs, and the like, and to make the heat exchangers compact. [Structure] By providing a V-shaped cut-and- raised portion 11 located between the upper-stage side water pipes along the upper edge of the fin 10,
The upper water pipe 23 has a fin shape with an increased amount of electric heat .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fin of a heat exchanger used for a water heater, a bath kettle, and the like.

[0002]

[Prior Art]

 In recent years, water heaters, bath kettles, and the like have become more compact, and in particular, there has been a demand for compact heat exchangers used therein.

However, when the heat exchanger is made compact, the clearance between the fins and the fins cannot be set very small due to problems such as fin clogging, and the standards such as thermal efficiency and exhaust temperature are JIS. Since it is specified in the standard, if the size of the fins is decided, the number of fins is decided and the size of the heat exchanger is almost decided in order to secure the predetermined hot water discharge capacity. .

[0004]

[Problems to be solved by the device]

 FIG. 3 shows the relationship between the fins and the water pipes in the conventional heat exchanger. A plurality of water pipes 2 are vertically installed in the vertical direction of the fin 1 so as to vertically penetrate the surface of the fin 1. In the heat exchanger configured as described above, as shown in FIG. 4, the fins 1 that have absorbed the heat of the combustion gas have a heat flow indicated by the arrow in the figure, and the water pipe 2a in the upper stage has almost the high temperature. The combustion gas does not rotate, but only passes between the upper water pipes 2a.

Therefore, the amount of heat transferred from the combustion gas to the upper water pipe 2a is small, the heat efficiency of the heat exchanger is low, and the exhaust gas temperature is high. Therefore, it has been pointed out that it is necessary to set a large number of fins in order to secure a predetermined thermal efficiency and exhaust gas temperature, which leads to an increase in the size of equipment and an increase in cost.

The present invention has been made in view of the above circumstances, and the present invention improves the heat efficiency of a single fin so that the heat efficiency can satisfy the standard heat efficiency and the exhaust gas temperature with a compact structure. It is intended to provide fins for exchangers.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a fin of a heat exchanger, which comprises a plurality of water pipes vertically arranged in multiple stages, absorbs heat of combustion gas, and transfers the heat to the water pipes. A V-shaped notch is provided on the upper edge of the fin so as to be located between the upper water pipes.

[0008]

[Action]

 As is clear from the above configuration, by installing the V-shaped notch on the upper edge of the fin and between the upper water pipes, the combustion gas flows to the wake side of the upper water pipe, and the upper water pipe The amount of heat transferred to

[0009]

【Example】

 Hereinafter, embodiments of the fins of the heat exchanger according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a front view of a fin according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing the action of the fin of a heat exchanger according to the present invention. In FIG. 1, the fin 12 has a plurality of water pipes 20 arranged in multiple stages in the vertical direction so as to vertically penetrate the surface of the fin 10. In the present embodiment, the plurality of water pipes 20 are provided with three lower water pipes 21, two middle water pipes 22 and three upper water pipes 23.

By the way, the feature of the present invention is that the shape of the fin 10 is modified so that the upper water pipe 23 can effectively conduct heat from the fin 10. That is, the V-shaped notch 11 is provided at the upper edge of the fin 10 so as to be located between the upper water tubes 23.

The cutout 11 has a rounded lower end 11 a, and the depth of the cutout (denoted by reference numeral d in the drawing) is the same as or equal to the distance between the fins 10. It is better to set it below this.

Therefore, as shown in FIG. 2, the combustion gas flows as shown by the arrow in FIG. 2 and also wraps around to the wake side of the upper stage water pipe 23 to significantly increase the amount of heat transfer in the upper stage water pipe 23. Is possible.

[0013]

[Effect of the device]

 As described above, the fin of the heat exchanger according to the present invention can improve the thermal efficiency of the fin itself and lower the exhaust temperature by increasing the thermal conductivity of the upper water pipe.

Therefore, the number of fins of the heat exchanger can be reduced in order to secure the predetermined thermal efficiency and exhaust temperature, and the heat exchanger can be made compact.

[Submission date] March 5, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fin of a heat exchanger used for a water heater, a bath kettle, and the like.

[0002]

[Prior Art]

 In recent years, water heaters, bath kettles, and the like have become more compact, and in particular, there has been a demand for the heat exchangers used therein to be more compact.

However, when advancing the compact heat exchanger, the problem of fin clogging can not be set interval is too small with full fin and the fin, also the thermal efficiency, the standards, such as exhaust temperature JIS Since it is specified in the standard, if the size of the fins is decided, the number of fins is decided and the size of the heat exchanger is almost decided in order to secure the predetermined hot water discharge capacity. .

[0004]

[Problems to be solved by the device]

 FIG. 3 shows the relationship between the fins and the water pipes in the conventional heat exchanger. A plurality of water pipes 2 are vertically installed in the vertical direction of the fin 1 so as to penetrate vertically through the surface of the fin 1. In the heat exchanger having the configuration of, as shown in FIG.Fins and fins Flowing between Of combustion gasThe flow is, Indicated by arrows in the figureStreamThis is the upper water pipe 2a Wake side In this case, almost no high-temperature combustion gas is circulated, and only passes between the upper water pipes 2a. ▲

Therefore, the amount of heat transferred from the combustion gas to the upper water pipe 2a is small, the heat efficiency of the heat exchanger is low, and the exhaust gas temperature is high. Therefore,
It has been pointed out that it is necessary to set a large number of fins in order to secure a predetermined thermal efficiency and exhaust gas temperature, which leads to an increase in equipment size and cost. ▲

The present invention has been made in view of such circumstances, and the present invention is to satisfy the standard thermal efficiency and exhaust gas temperature ▲ with a compact structure by increasing the thermal efficiency of the fin alone ▲. It is an object of the present invention to provide a fin of a heat exchanger capable of ▲

▲

[Means for Solving the Problems] ▲ In order to achieve the above object, the present invention comprises a plurality of water pipes arranged in a multi-stage in the vertical direction, and absorbs heat of combustion gas to generate heat in the water pipe. Oite ▲ the fins of the heat exchanger that conducts the switching force of the V-shaped upper edge of the fin
Characterized was part that is provided on ▲ to be located between the upper water pipe. ▲

▲

[Operation] As is apparent from the above configuration, by installing the V-shaped cut-and- raised portion at the upper edge of the fin and between the water pipes of the upper ▲ stage, the combustion gas wakes behind the water pipe of the upper stage. The heat transfer amount to the upper water pipe increases. ▲

▲

Embodiments Hereinafter, embodiments of the fins of the heat exchanger according to the present invention will be described in detail with reference to the accompanying drawings.
1 (a) shows an embodiment of the present invention, a front view of the fin, FIG . 1 (b) ▲ is a sectional view taken along the line AA of FIG. 1 (a) , and FIG. 2 is according to the present invention. It is explanatory drawing which shows ▲ the effect | action of the fin of a heat exchanger. 1. In FIG. 1, the fin 10 has a plurality of water pipes 20 arranged in multiple stages along the vertical direction so as to vertically penetrate the surface of the fin 10. In the present embodiment, the plurality of water pipes 20 are provided with three lower water pipes 21, two middle water pipes 22 and three upper water pipes 23.
▲

By the way, the feature of the present invention lies in the upper water pipe 23 and the fins 10 .
It is obtained by adding a twist to the fins 10 shaped as heat transfer we are performed in a closed-▲ effective from the combustion gases. That is, a V-shaped cut-and- raised portion 11 is installed at the upper edge of the fin 10 so as to be located between the upper water tubes 23. ▲

The cut- raised portion 11 has a rounded lower end 11a, and the depth of the cut- raised portion (indicated by symbol d in the figure) is between the fins 10 and 10. It is better to set the interval to the same or less than ▲. ▲

Therefore, as shown in FIG. 2, the combustion gas flows as shown by the arrow in FIG. 2 and also wraps around to the downstream side of the upper-stage side water pipe 23 to remarkably increase the amount of heat transfer in the upper-stage side water pipe 23. ▲ can be done. ▲

▲

[Effects of the Invention] ▲ As described above, the fin of the heat exchanger according to the present invention improves the heat efficiency of the heat exchanger and lowers the exhaust temperature by increasing the amount of electric heat entering the upper water pipe. And are possible. ▲

Therefore, the number of fins of the heat exchanger can be reduced in order to secure a predetermined thermal efficiency and exhaust temperature, and the heat exchanger can be made compact. ▲

[Brief description of drawings]

FIG. 1 is a plan view showing fins of a heat exchanger according to the present invention.

FIG. 2 is a schematic diagram showing a heat flow in the fin shown in FIG.

FIG. 3 is a plan view showing fins of a conventional heat exchanger.

FIG. 4 is a schematic diagram showing a heat flow in a conventional fin.

[Explanation of symbols]

 10 Fins 11 Notch 20 Water Pipe 21 Lower Side Water Pipe 22 Middle Side Water Pipe 23 Upper Stage Water Pipe

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[Procedure amendment]

[Submission date] March 5, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of device] Heat exchanger fin

[Scope of utility model registration request]

[Brief description of drawings]

FIG. 1 (a) shows a fin of a heat exchanger according to the present invention.
Positive elevational view, (b) the A-A sectional view of FIG. 1 (a).

Figure 2 is a schematic view showing the flow of combustion gas in the fin shown in FIG. 1 (a).

[3] a positive surface view showing a fin of a conventional heat exchanger.

FIG. 4 is a schematic diagram showing a flow of combustion gas in a conventional fin.

[Description of symbols] 1 Conventional fin 2 Conventional fin water pipe 2a Conventional fin upper water pipe 10 Fin 11 Cut-and- raised portion 11a Cut-raised lower end 20 Water pipe 21 Lower-stage water pipe 22 Middle-stage water pipe 23 Upper-stage water pipe

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

Claims (1)

[Scope of utility model registration request] 1. A fin of a heat exchanger comprising a plurality of water pipes arranged in multiple stages in the vertical direction, which absorbs heat of combustion gas and conducts heat to the water pipe, wherein a V-shaped fin is formed on an upper edge of the fin. A fin for a heat exchanger, characterized in that a notch is provided between the upper water pipes.