JPH058343U - Heat insulating plate structure in water heater - Google Patents

Abstract

(57) [Abstract] [Purpose] If abnormal heating due to exhaust gas leakage occurs in the combustion part of the water heater, the safety device is accelerated and the heat shield plate structure in the water heater is simplified to be attached to the main body. The purpose is to provide. [Structure] A heat insulating plate 10 made of a metal plate having excellent heat resistance is bent and formed in a box shape, and one-touch and the heat exchanger outer shell is provided on the back side of the heat exchanger outer shell 20 via a fixture 30. The rear side of the part 20 is attached in a sealed state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat-insulating plate structure that promptly activates a safety device in a water heater.

[0002]

[Prior Art]

 Conventionally, a heat shield plate installed in a hot water supply apparatus is such that a heat shield plate 3 is fixed to the exterior 1 by screws 4 on the back side of a heat exchanger 2 housed in the exterior 1, as shown in FIG. As shown in FIG. 4, a safety device such as a temperature fuse 5 for preventing abnormal heating is installed on the outer shell of the heat exchanger 2 as shown in FIG.

[0003]

[Problems to be solved by the device]

 As described above, since the heat insulating plate 3 is conventionally fixed to the surface of the exterior 1 with the screw 4, a gap (indicated by d in FIG. 4) is formed between the outer shell of the heat exchanger 2 and the heat insulating plate 3. However, if the inside of the heat exchanger 2 is abnormally heated due to exhaust gas leakage, it takes a lot of time to operate the safety devices such as the thermal fuse 5, and it is pointed out that the safety of the device is not preferable. ing.

Further, since the heat insulating plate 3 is attached to the exterior 1 via the screw 4, it takes a lot of man-hours for attachment, which is a major factor of lowering workability of attachment.

The present invention has been made in view of the above circumstances, and an object of the present invention is to accelerate the operation of a safety device in a water heater, improve the safety of the device, and prevent the heat insulating plate from operating. Another object of the present invention is to provide a heat insulating plate structure for a water heater with improved mounting workability.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a heat insulating plate structure in a water heater in which a heat insulating plate made of a metal plate having excellent heat resistance is attached to the back of a heat exchanger of the water heater, wherein the heat insulating plate is a heat exchange plate. It was bent into a box shape so as to cover the outer body part, and a fixture for holding a thermal fuse was attached to the inner surface of this heat insulating plate, and this fixture was wound around the outer circumference of the heat exchanger. The heat insulating plate is fixed to the outer shell of the heat exchanger by being fitted and fixed to the water passage pipe.

[0007]

[Action]

 As is clear from the above configuration, the heat insulating plate is bent into a box shape, and the fixture attached to the inner surface of the heat insulating plate is fitted and fixed to the water pipe of the outer shell of the heat exchanger. The outer body can be effectively sealed, and if abnormal heating such as exhaust leakage occurs, the safety device will operate promptly.

Further, the heat insulating plate can be attached to the heat exchanger side by one-touch by fitting and fixing the fixture attached to the inner surface of the water passage pipe.

[0009]

【Example】

 Hereinafter, embodiments of a heat insulating plate structure in a water heater according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing a heat shield plate structure according to the present invention, and FIG. 2 is a sectional view showing a heat shield plate according to the present invention attached to an outer shell of a heat exchanger. Referring to FIG. 1, the heat insulating plate 10 used in the present invention is formed by bending a metal plate having excellent heat resistance into a box shape, and is mounted so as to cover the rear side of the outer body 20 of the heat exchanger of the water heater. Be done.

Further, a fixture 30 is attached to the inner surface of the heat shield plate 10. The fixture 30 has a function of holding the temperature fuse 40, which is a safety device, and a function of holding the heat shield plate 10 outside the heat exchanger. It has a function of attaching to the body portion 20.

That is, the circumference of the temperature fuse 40 is wound and held by the support piece 31 extending above the fixing tool 30, and the pair of leg pieces 32 provided on the fixing tool 30 perform heat exchange by its elastic action. The heat insulating plate 10 can be easily attached to the back surface of the heat exchanger outer body portion 20 by fitting the outer peripheral surface of the water passage pipe 21 wound around the outer body portion 20 of the heat exchanger.

Therefore, in the state where the heat shield plate 10 is attached to the rear side of the heat exchanger outer shell portion 20, the heat exchanger outer shell portion 20 is sealed by the box-shaped heat shield plate 10 as shown in FIG. However, if abnormal heating occurs due to exhaust gas leakage or the like, the temperature fuse 40, which is a safety device, operates quickly, which has the advantage of increasing the safety of the device.

Further, the heat insulating plate 10 can be attached to the outer body 20 of the heat exchanger with one touch via the fixture 30, and the workability of attaching the heat insulating plate 10 is significantly improved as compared with the conventional one. There are advantages.

[0014]

[Effect of the device]

 As described above, the heat insulating plate structure in the water heater according to the present invention has a structure in which the back surface of the outer shell of the heat exchanger is sealed by a heat insulating plate formed by bending a metal plate with excellent heat resistance into a box shape. When the inside of the body is abnormally heated, the temperature fuse, which is a safety device, operates quickly and has the effect of significantly improving the safety of the equipment.

Further, the box-shaped bent heat insulating plate can be attached to the outer body of the heat exchanger with a one-touch attachment through a fixture, which is easier to install than the conventional screw fixing. It has the effect of improving rapidly.

In addition, since the outer shell of the heat exchanger is hermetically sealed by the heat insulating plate, it is not necessary to set a large number of temperature fuses which are safety devices, and the number of temperature fuses can be saved to reduce the cost. It has the effect that it can be achieved.

[Brief description of drawings]

1 shows an embodiment of a heat shield plate structure according to the present invention, and is an overall perspective view showing a heat exchanger outer body and a heat shield plate.

FIG. 2 is a vertical cross-sectional view showing a heat insulating plate according to the present invention attached to an outer shell of a heat exchanger.

FIG. 3 is an exploded perspective view showing a state before attachment of a conventional heat insulating plate.

FIG. 4 is a vertical cross-sectional view showing a mounted state of a conventional heat insulating plate.

[Explanation of symbols]

 10 Heat Shield Plate 20 Heat Exchanger Outer Body 21 Water Pipe 30 Fixture 31 Thermal Fuse Support Piece 32 Leg Piece 40 Thermal Fuse

Claims (1)

[Claims for utility model registration] [Claim 1] In a heat shield plate structure in a water heater in which a heat shield plate made of a metal plate having excellent heat resistance is attached to the back of a heat exchanger of the water heater, the heat shield plate is It is bent in a box shape so as to cover the outer body of the exchanger, and a fixture for holding a thermal fuse is attached to the inner surface of this heat insulating plate, and this fixture is wound around the outer circumference of the heat exchanger. A heat shield plate structure for a water heater, characterized in that the heat shield plate is fixed to the outer shell of the heat exchanger by being fitted and fixed to the water passage pipe.