JP2003121008A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance thermal efficiency and prevent the formation of moisture condensation. SOLUTION: A first guide plate 4a formed by cutting a fin 4 so that the fin rises at both right and left sides toward upper hot water supply pipes 6 and a second guide plate 4b between upper hot water supply pipes 6 are provided thereby to improve the heat absorption of upper hot water supply pipes 6 for enhanced thermal efficiency and to prevent the formation of moisture condensation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a heat exchanger for heating hot water.

[0002]

2. Description of the Related Art A conventional water heater uses gas or gasified kerosene as a fuel, burns a burner with gas mixed with air, and is provided with a drum forming a combustion chamber above the burner. The combustion gas heated by the burner flows along the drum, and the heat retained therein is absorbed by the fins 11 of the heat exchanger to heat the water supplied through the hot water supply pipes 12 and 13 from the hot water supply inlet to the hot water supply outlet. More hot water. On the other hand, the combustion gas that is not absorbed by the fins 11 is exhausted from the exhaust port of the water heater as an exhaust gas at a high temperature.

[0003]

However, in the heat exchanger of the above-mentioned conventional structure, the lower hot water supply pipe 12 and the upper hot water supply pipe 13 through which the combustion exhaust gas flows are arranged in a zigzag manner, but these pipes are arranged. Since the gap between them is large, the exhaust gas passes through it at a high temperature and is discharged.Therefore, there is a problem that the thermal efficiency decreases, and when the hot water supply amount is large and the set hot water temperature is low, dew condensation occurs on the hot water supply pipe. There were challenges.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a plurality of hot water supply pipes communicating with a water supply circuit in the horizontal direction and a plurality of vertical fins penetrating through the fins. A first guide plate is cut and raised from the fins from both sides toward the hot water supply pipe in the upper stage, and a second V-shaped guide plate is formed between the hot water supply pipes in the upper stage.

According to the above invention, the combustion exhaust gas flowing between the lower hot water supply pipe and the upper hot water supply pipe passes along the first guide plate without passing as it is, and the surface of the lower hot water supply pipe and the upper hot water supply pipe surface. Because it flows along
More heat can be supplied to the hot water supply pipe. Moreover, since the hot water supply pipe conducts heat to the upper surface of the pipe where dew condensation is most likely to occur due to the second guide plate, the occurrence of dew condensation can be suppressed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a plurality of hot water supply pipes connected to a water supply circuit are arranged in a horizontal direction and in a plurality of vertical directions, and the fins are cut and raised from both sides of the fin toward the upper hot water supply pipe. In addition to forming the first guide plate, a V-shaped second guide plate is formed between the upper hot water supply pipes.

Further, as another embodiment, in addition to the above structure, a third guide plate formed by cutting and raising a cylindrical or elliptic cylinder is provided between the upper and lower hot water supply pipes. Then, the heat absorption efficiency of the hot water supply pipe is improved to prevent the occurrence of dew condensation.

[0008]

Embodiments of the heat exchanger of the water heater according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a schematic configuration diagram of a water heater as Embodiment 1 of the present invention. The water heater uses gas or gasified kerosene as fuel, and a burner 1 in which a mixed gas mixed with air burns is arranged below a drum 2 forming a combustion chamber. The combustion exhaust gas heated by the burner 1 rises along the drum 2, absorbs heat in the fins 4 of the heat exchanger 3, and heats the water supplied from the water supply inlet 8 and flowing in the hot water supply pipes 5, 6. Then, the heated water is supplied from a faucet or the like through a hot water supply pipe connected to a hot water supply outlet 9 of the water heater.

FIG. 2 shows the relationship between the hot water supply pipe and the fan in the heat exchanger of the first embodiment.

As is apparent from FIG. 2, hot water supply pipes 5 and 6
Is formed by being inserted through a plurality of identical fins, arranged in two steps above and below, and brazed together. Between the upper hot water supply pipes 6, a V-shaped guide plate 4b is erected on the upper ends of the fins 4, and the lower hot water supply pipe 5 and the upper hot water supply pipe 6 are provided.
On both sides of the space, diagonal guide plates 4a are raised toward the lower part of the upper stage pipe 6, and combustion exhaust gas from below is flowed along the lower side of the upper stage hot water supply pipe 6. is there.

3 (X), (Y), and (Z) are perspective views of various forms of the first guide plate, and 4a is a cut-raised U-shape of FIG. 3 (X). 1 guide plate, 4a ', 4
The first guide plate of a ″ is in the case where the cut and raised state is an elliptic cylinder and a flat plate, respectively.
(Y) and (Z) are perspective views of the second guide plate provided on the upper end portion of the fin 4, and 4b, 4b ', and 4b sequentially shown in FIGS. 4 (X), (Y), and (Z). In each form, the V-shape has a common shape. In the case of 4b, the longitudinal side of the hot water supply pipe is closed, and in the case of 4b ', it is in the open state, and further 4b "is the V-shape of V-shape. The cut-and-raised portion is formed so as to decrease downward.

(Second Embodiment) FIG. 5 is a plan view of a heat exchanger fin in the second embodiment.

The description of the same components as in the first embodiment will be omitted, and only the differences will be described.

In the second embodiment, in addition to the structure of the first embodiment described above, a third guide plate 4c is further provided in the lower portion between the upper hot water supply pipes 6, and as the third guide plate. As shown in FIGS. 6 (X) and (Y), the shape shown by 4c in FIG. 6 (X) is a cut and raised shape is a cylinder, and the shape shown by 4c 'in FIG. 6 (Y) is The cut and raised shape is an elliptic cylinder.

As a result, the combustion exhaust gas is further fed to the pipe 6
The heat absorption efficiency is increased because it flows along with. The combustion exhaust gas further flows along the upper pipe 6. Further, 4a and 4b are the same as those in the first embodiment. FIG. 6 is a perspective view of the guide plate 4c, and 4c 'shows the shape of another embodiment.

[0017]

As is apparent from the above description, according to the heat exchanger of the present invention, the first guide plate cut and raised from both sides of the fin toward the upper hot water supply pipe is formed, and V-shaped second between the upper hot water supply pipes
By forming the guide plate 4b and the third cylindrical guide plate that is cut and raised between the upper and lower hot water supply pipes, the heat exchange rate can be improved by an extremely simple means. Further, it is possible to completely prevent dew condensation that occurs when the amount of water is large and the temperature of the hot water is low.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a plan view of fins of the heat exchanger.

FIG. 3 (X) The first guide plate of the fin of the heat exchanger is U
(Y) A perspective view of a shape formed by cutting and raising a letter-shape (Y) A perspective view of a shape in which the first guide plate is formed of an elliptic cylinder (Z) A first guide plate is formed by cutting and raising a flat plate shape Perspective view of the broken form

FIG. 4 (X) is a perspective view of the second guide plate of the heat exchanger in a V shape and the central part is closed. (Y) The central part of the second guide plate is open. (Z) Perspective view of a V-shaped form. A perspective view of the second guide plate in which the central portion of the second guide plate is cut and raised, and the lower part of the V-shape is made smaller.

FIG. 5 is a plan view of fins of the heat exchanger according to the second embodiment of the present invention.

FIG. 6 (X) is a perspective view in which the third guide plate of the same heat exchanger is cylindrical, and (Y) is a perspective view in which the third guide plate is elliptical.

FIG. 7 is a block diagram of a conventional heat exchanger.

[Explanation of symbols]

3 heat exchanger Four fins 4a, 4a ', 4a "First guide plate 4b, 4b ', 4b "second guide plate 4c, 4c 'Third guide plate 5 Lower hot water supply pipe 6 Upper hot water supply pipe

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoichi Kimura             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Yoshimitsu Fujiwara             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 3L036 AA06                 3L103 AA35 AA50 BB43 CC02 CC27                       DD08 DD33 DD68

Claims (2)

[Claims] 1. A heat exchanger in which a plurality of hot water supply pipes communicating with a water supply circuit are arranged in a horizontal direction and a plurality of stages in a vertical direction, and a plurality of fins are penetrated to form a heat exchanger from both sides of the fins. A heat exchanger provided with a first guide plate formed by cutting and raising in an oblique direction toward the upper pipe, and a second guide plate formed in a V shape between the upper hot water supply pipes. 2. A heat exchanger in which a plurality of hot water supply pipes communicating with a water supply circuit are arranged in a horizontal direction and a plurality of stages in a vertical direction, and the heat exchanger is formed by penetrating a plurality of fins. A first guide plate formed by cutting and raising in a diagonal direction toward the pipe, a second guide plate formed in a V shape between the upper-stage hot water supply pipe, and a cylindrical or elliptic pipe cut-and-raised between the upper and lower hot water supply pipes. And a third guide plate formed by the heat exchanger.