JPH05118665A - Heat exchanger of combustion implement - Google Patents

Abstract

PURPOSE:To suppress or prevent thermal deterioration, oxidation deterioration of a body plate of a combustion boiler even in the case of a heat exchanger in which a plate to be heated having barring holes and air gaps continued to a lower edge of the plate to be heated are used. CONSTITUTION:Many plates 2 to be heated having barring holes 3 of a shape in which air gaps 4 are continued up to its lower edge at a position separate from a heat absorption tube passing position are arranged in a combustion boiler in a heat exchanger of a combustion implement. Thus, heat generated in the boiler is absorbed to the tube through the plates 2. Heat shut-off plates 7 for shutting OFF the holes 3 and the gaps 4 continued thereto are provided to a body plate 5 of the boiler near both ends of the arranged plates 2.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to heat exchangers for combustion appliances.

[0002]

2. Description of the Related Art As a conventional example of a heat exchanger for a combustion instrument of this kind, there is a heat exchanger described in Japanese Patent Application No. 1-61670.
This conventional heat exchanger will be described with reference to FIGS. 7, 8 and 9. FIG. 7 is a front view showing a configuration of a main part of a conventional heat exchanger shown in Japanese Utility Model Application No. 1-61670, FIG. 8 is a sectional view taken along line AA of FIG. 7, and FIG. 9 is a sectional view taken along line BB of FIG. Is. Reference numeral 1 is a heat absorbing tube, 2 is a plate to be heated, and 3 is a burring hole. In the burring hole 3, a void 4 continuous with the hole 3 continues to the lower edge of the plate to be heated. Reference numeral 5 denotes a body plate of a combustion can body of a combustion appliance. With the burring holes 3 and the gaps 4 as described above, even when the distance between the positions where the heat absorbing tubes 1 penetrate is widened, the intermediate position of the distance may be overheated. Therefore, the disadvantage that the intermediate position of the heated plate 2 is deteriorated due to heat or oxidation is prevented.

[0003]

However, in the above-mentioned conventional heat exchanger for a burning appliance, when a large number of the heated plates 2 are arranged, the burring holes 3 and the voids formed in each of the heated plates 2 are formed. As shown in FIG. 9, 4 constitutes a kind of tunnel passage, and the rising combustion heat is guided through the tunnel passage and directly hits the body plate 5 of the combustion can body. Therefore, in the conventional case, the body plate 5 is exposed to a high temperature, a large thermal stress is likely to be generated, and cracks are generated, which causes thermal and oxidative deterioration of the body plate.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and even a heat exchanger using the burring hole 3 and the heated plate 2 provided with the gap 4 continuous from the burring hole 3 to the lower edge of the heated plate. An object of the present invention is to provide a heat exchanger for a combustion instrument capable of suppressing or preventing thermal deterioration and oxidative deterioration of the body plate 5 of the combustion can body.

[0005]

In order to achieve the above object, a heat exchanger of a combustion apparatus according to the present invention is provided with a burring hole having a shape in which a void is continuous to a lower edge at a position apart from a position where a heat absorbing tube penetrates. A large number of heated plates are arranged in the combustion can,
As a result, a heat exchanger of a combustion device, wherein the heat generated in the combustion can is absorbed by the endothermic tube through the heated plate, the heat exchanger being located near both ends of the arranged heated plates, the combustion can. A first feature is that a heat shield plate that shields the burring hole and the gap continuous with the burring hole is provided between the body plate and the body plate. Further, the heat exchanger of the combustion instrument of the present invention,
A large number of heated plates provided with burring holes in the form of continuous voids up to the lower edge at positions away from the endothermic tube penetration position are arranged in the combustion can body, whereby the heat generated in the combustion can body is A heat exchanger of a combustion device adapted to be absorbed by a heat absorption tube through a heated plate, wherein only the heated plate located in the vicinity of a body plate constituting the combustion can body has no burring holes and voids. The second feature is that the plate to be heated is replaced.

[0006]

According to the first feature described above, the heat shield plates for shielding the burring holes and the voids continuous with the burring holes are provided near the both ends of the arranged heated plates and between the body plate of the combustion can body. Since they are arranged, the high temperature air flowing toward the trunk plate side through the tunnel passage formed by the continuation of the burring hole and the gap is blocked by the heat shield plate before the trunk plate. Therefore, the trunk plate is prevented from being directly exposed to high temperature, and thermal deterioration,
Oxidative deterioration is suppressed or prevented. Of course, the heated plate portion far from the position of each heat absorption tube is prevented from being overheated by the heat radiation by the bar link hole and the gap. Further, according to the second feature, only the heated plate located near the body plate constituting the combustion can body is replaced with the heated plate having no burring hole and no void, so that the burring hole and the void are continuously connected. The high-temperature air flowing to the shell plate side through the formed tunnel passage is blocked by the burring hole and the heated plate having no voids in front of the shell plate.
Therefore, as in the case of the first feature, heat deterioration and oxidative deterioration of the body plate are prevented. Excessive heating of the heated plate portion far from the endothermic tube position is prevented by heat dissipation by the burring holes and the air gaps.

[0007]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a cross-sectional view of a heat exchanger, and FIG. 2 is a longitudinal section of the heat exchanger taken along the line CC in FIG. FIG. 3 is a front view of the heat shield plate.

A combustion can body having a combustion chamber 6 formed therein and a large number of heated plates 2 arranged therein is surrounded by a body plate 5. A plurality of heat absorbing tubes 1 are arranged vertically and horizontally at a constant interval in the can, and penetrate the large number of heated plates 2 arranged in the can. Each heated plate 2 is provided with a burring hole 3 at a position farthest from the penetrating position of the heat absorption tube 1, and a void 4 is continuous from the hole 3 to the lower edge of the heated plate 2. This prevents or suppresses overheating of a portion that is apt to be overheated at a position away from the heat absorption tube 1.

Reference numeral 7 denotes a heat shield plate, which is the array of heated plates 2
It is provided between the body plate 5 and both ends of the. Actually, the heat shield plate 7 is provided so as to cover a few of the heated plates 2 near both ends. The shielding plate 7 is locked to the body plate 5 at the upper edge bent portion 7a and is fitted into the heat absorbing tube 1 at the cutout portion 7b to be stable. Further, the remaining main body portion 7c overlaps with the burring hole 3 and the void 4 of the heated plate 2 when arranged together with the heated plate 2, and shields this. As a result, the flow of high-temperature air passing through the burring holes 3 and the gap 4 is blocked, and high heat is prevented from directly hitting the body plate 5. That is, heat deterioration and oxidation deterioration of the body plate 5 are prevented. In addition, it is possible to prevent variation in temperature distribution (prone to high temperature near both ends) due to easy alignment of heated plates 2 near both ends in the array of heated plates 2 (variation in alignment gap), and heat exchange efficiency. Can be improved.

4 to 6 show a second embodiment of the present invention, FIG. 4 is a front view of a heated plate, FIG. 5 is a plan view of a heated plate of the present shape 1, and FIG. 6 is an embodiment. FIG. 3 is a vertical sectional view of the heat exchanger of FIG. The heated plate 2 shown in FIG. 4 is the same as the heated plate 2 of the first embodiment described above. In this embodiment, another heated plate 8 for both ends, which has a different shape from the heated plate 2, is used. The heated plates 8 for both ends are the burring holes 3 in the heated plate 2.
Also, the lower edge is simply formed in a wavy shape without providing the void 4. In this embodiment, several sheets on both ends of the heated plate 2 arranged by the heated plates 8 for both ends are replaced. By doing so, as shown in FIG. 6, the burring holes 3 and the gaps 4 of the heated plates 2 to be arranged are arranged.
The hot air passing through can be shielded in front of the body plate 5. Therefore, it is possible to prevent thermal deterioration and oxidative deterioration of the body plate 2 without deteriorating the characteristics due to the use of the heated plate 2, that is, the above-mentioned overheating prevention property of the heated plate 2.

Numeral 9 is an exhaust pipe, and a body plate 5 is provided through a packing 10.
Is combined with. The heated plates 8 for both ends are brought into contact with the packing 10. The heated plates 8 for both ends and the packing 10 prevent heat from leaking out from the joint between the body plate 5 and the exhaust pipe 9, and prevent the reduction of thermal efficiency and achieve uniform heat distribution.

[0012]

According to the heat exchanger of the combustion apparatus according to the first aspect of the present invention, the heat exchanger of the combustion apparatus according to the first aspect of the present invention has a structure in which both the vicinity of both ends of the plate to be heated and the body plate of the combustion can body are arranged. Since the heat shield plate that shields the burring hole and the gap that is continuous with the burring hole is provided between the burring hole and the burring hole, it is possible to prevent high temperature heat from directly hitting the body plate, and to prevent heat deterioration and oxidation deterioration of the body plate. Further, it is possible to prevent uneven temperature distribution in the heat exchanger due to misalignment near both ends of the arrayed heated plates. Further, according to the heat exchanger of the combustion apparatus according to the second aspect, only the heated plate located in the vicinity of the body plate forming the combustion can body is replaced with the heated plate having no burring hole and no void. It is possible to prevent adverse effects of high temperature heat on the plate, and prevent uneven temperature distribution in the heat exchanger.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a heat exchanger according to a first embodiment.

FIG. 2 is a vertical cross-sectional view of the heat exchanger taken along the line C-C in FIG.

FIG. 3 is a front view of a heat shield plate in the first embodiment.

FIG. 4 is a front view of a heated plate according to a second embodiment.

FIG. 5 is a front view of the plate to be heated of the first type in the second embodiment.

FIG. 6 is a vertical sectional view of a heat exchanger according to a second embodiment.

FIG. 7 is a front view showing a configuration of a main part of a conventional heat exchanger.

8 is a cross-sectional view taken along the line AA of FIG.

9 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 1 Heat Absorption Tube 2 Heated Plate 3 Burring Hole 4 Void 5 Body Plate 7 Heat Shield Plate 8 Heated Plate for Both Ends

Claims (2)

[Claims] 1. A large number of heated plates having burring holes each having a continuous void up to the lower edge at a position distant from the endothermic tube penetrating position are arranged in the combustion can body. A heat exchanger of a combustion device adapted to absorb heat generated by a heat absorbing tube through the heated plate, in the vicinity of both ends of the arranged heated plates and between the body plate of the combustion can body. A heat exchanger for a combustion appliance, wherein a heat shield plate for shielding the burring hole and the void continuous with the burring hole is provided in the heat exchanger. 2. A large number of heated plates having burring holes each having a continuous void up to the lower edge are arranged in the combustion can body at a position apart from the endothermic tube penetrating position. A heat exchanger for a combustion device, wherein heat generated is absorbed by a heat absorbing tube through the heated plate, wherein only the heated plate located near a body plate forming the combustion can body is burred. A heat exchanger for a combustion appliance, which is replaced with a heated plate having no holes or voids.