JPH0634199A - Heat exchanger for bath boiler with hot-water supplier - Google Patents

Abstract

PURPOSE:To prevent the breakage and/or leakage of water of hot-water supplying heat exchanging coils, which are generated due to the thermal expansion of heat exchanging coils for bath, in a bath boiler with hot-water supplier, which is equipped with hot-water supplying heat exchanging coils and heat exchanging coils for bath, which are welded in parallel by fusion and are attached to the same fin. CONSTITUTION:A heat exchanger 10 is constituted of hot-water supplying coils 1, welded in parallel to heat exchanging coils 2 in parallel to each other by fusion and whose thickness is thicker than the same of the coils 2, and fins 4, to which the coils 1, 2 are attached. When the hot-water supplying heat exchanging coils 1 are heated under a condition that no water is existing in the heat exchanging coils 2 for bath, the hot-water supplying heat exchanging coils 1 absorb the thermal expansion of the heat exchanging coils 2 for bath due to high temperature rise thereof since the thickness of the coils 1 is increased as described above.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A conventional heat exchanger for a fryer with a water heater will be described with reference to FIG.

In the conventional bath with a water heater, the heat exchange coil 11 for hot water supply and the heat exchange coil 12 for bath are arranged in parallel to each other by the brazing material 13.
In the hot water heater having the heat exchanger 15 fused and welded in the same fin 14, the hot water supply heat exchange coil 1
1 and the heat exchange coil 12 for the bath had the same plate thickness.

[0004] Heat exchange coils for hot water supply and bath are integrated to heat only the heat exchange coil 11 for hot water supply, the heat exchange coil 12 for bath, or the two heat exchange coils 11, 12 at the same time. And then used.

[0005]

When the bath water is drained and emptied after the device is used, the hot water supply heat exchange coil 11 is full and the bath heat exchange coil 12 is empty. When the hot water supply operation for heating the hot water supply heat exchange coil 11 is performed, the waterless bath heat exchange coil 12 has a temperature of about 200 ° C.
The heat-exchange coil 11 for hot water supply was heated and expanded to pull out the heat-exchange coil 11 for hot-water supply, and as a result, the heat-exchange coil 11 for hot-water supply was broken to cause water leakage.

An object of the present invention is to solve the above-mentioned problems and to provide a heat exchanger for a fryer with a water heater, which prevents breakage of the heat exchange coil for hot water supply.

[0007]

In order to achieve the above-mentioned object, the present invention provides a heat exchanger for a bathrobe with a water heater, including a heat exchange coil for hot water supply and a heat exchange coil for bath that are fusion-welded in parallel with each other. In the same fin, and the plate thickness of the material of the heat exchange coil for hot water supply is thicker than that of the heat exchange coil for bath.

[0008]

With the above-described structure, the present invention prevents thermal expansion of the bath heat exchange coil that occurs when only hot water supply operation is performed when the bath water is empty and there is no water in the bath heat exchange coil. The thickened heat exchange coil for hot water supply follows to prevent damage to the heat exchange coil for hot water supply.

[0009]

1 is a cross-sectional view showing an embodiment of a heat exchanger for a fryer with a water heater according to the present invention, showing a cross section taken along the line AA 'in FIG. Reference numeral 1 is a hot water supply heat exchange coil in which the material is thicker than the bath heat exchange coil, and 2 is a bath heat exchange coil. 3 is a hot water supply heat exchange coil 1 and a bath heat exchange coil 2
It is a brazing material that fuses and welds the fins 4 together. The drum 5 is arranged on the open side of the side surfaces of the plurality of heat transfer plates 4 in order to prevent gas leakage of the heating exhaust gas. Normally, when the bath is not used, that is, when there is no bath water, the heat exchange coil 1 for hot water supply is full,
The bath heat exchange coil 2 is not filled with water. At this time, if only the hot water supply operation is performed, the water in the hot water supply heat exchange coil 1 flows and the temperature of the hot water supply heat exchange coil 1 does not rise above a certain temperature because of the water, but the inside of the bath heat exchange coil 2 is empty. Therefore, the temperature rises to about 200 ° C. Therefore, the bath heat exchange coil 2 having a temperature higher than that of the hot water supply heat exchange coil 1 tries to stretch the hot water supply heat exchange coil 1 by thermal expansion. However, since the heat exchange coil 1 for hot water supply has a large plate thickness of the material, the heat exchange coil 1 follows the elongation, is not damaged, and does not leak. On the other hand, since the hot water supply heat exchange coil 1 is full of water during the bath operation, the temperature of the hot water supply heat exchange coil 1 rises only up to about 90 ° C., the temperature difference is small and the force for stretching the bath heat exchange coil 2 becomes weak. The heat exchange coil 2 for the bath does not break. As a result, even if the bath heat exchange coil 2 and the hot water supply heat exchange coil 1 are integrally fused, the heat exchanger does not leak due to damage.

[0010]

EFFECTS OF THE INVENTION As is apparent from the above-described embodiments, the present invention provides a bath heat exchange coil which is generated when a hot water supply operation is performed by making the hot water supply heat exchange coil thicker than the bath heat exchange coil. Since the thermal expansion is followed by the hot water supply heat exchange coil having a thick material, the thermal expansion damage of the hot water supply heat exchange coil can be prevented.

On the other hand, even if the material of the heat exchange coil for hot water supply is thickened, the temperature of the heat exchange coil for hot water supply rises only up to about 90 ° C. because the heat exchange coil for hot water supply is full of water during the bath operation. Since the temperature difference is small and the force for stretching the heat exchange coil for the bath is weak, and the heat exchange coil for the bath does not break, it is possible to obtain a heat exchanger with a water heater with a water heater having improved durability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a heat exchanger for a bathrobe with a water heater of the present invention.

FIG. 2 is a perspective view of the heat exchanger of the water heater of the same embodiment.

FIG. 3 is a sectional view of a conventional heat exchanger.

[Explanation of symbols]

 1 Heat exchange coil for hot water supply 2 Heat exchange coil for bath 4 Fin 10 Heat exchanger

Claims (1)

[Claims] 1. A hot water supply heat exchange coil and a bath heat exchange coil fused in parallel to each other are provided in the same fin, and the material thickness of the hot water supply heat exchange coil is equal to that of the bath heat exchange coil. A flat-bed heat exchanger with a water heater thicker than the plate thickness.