JPH0621687B2 - Exhaust hood of gas water heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to an exhaust hood for a gas water heater.

[Conventional technology]

For example, in a small household gas water heater that has been generally used in the past, as shown in FIG. 12, an upper portion of an exhaust port opened on the upper surface of a vessel outer shell A ″ composed of a back cover and a front cover. In addition, a shallow dish-shaped exhaust guide 4 ″ is provided with a certain space between the exhaust guide 4 ″ and the exhaust port, and the exhaust flow from the heat exchanger is mainly guided forward. Therefore,
The wind from the front directly enters the exhaust opening to suppress the exhaust gas.Especially when the window is used in summer, when the window is used, the incomplete combustion preventive device operates due to the exhaust gas suppression due to the effect of the wind. The exhaust guide 4 ″ is exposed at the upper part of the outer shell A ″ of the body, so it is impossible to give the exhaust guide 4 ″ and the outer shell A ″ of one body a sense of unity. Therefore, it was lacking in novelty in terms of design.

Therefore, as illustrated in FIGS. 9 to 11, the front cover wall 2'at the front end of the upper end of the front cover 1'and the heat exchanger 3 '.
The exhaust hood formed by the exhaust guide 4'covering the upper surface of the is built into the upper part of the body so that it cannot be seen from the field of view. Applicant filed earlier (Utility Model Registration Application No. 146815, 1986, September 25, 1986)
Date application).

[Problems to be Solved by the Invention]

In the invention according to the above-mentioned prior application, since the high temperature exhaust gas is mainly discharged straight forward and obliquely upward, the horizontal discharge angle range α ₀ ′ and the vertical discharge angle range θ 0
_{If the} gas water heater is installed close to, for example, a hanging cabinet or ceiling provided at the top of a kitchen sink or the like, the exhaust heat may heat the hanging cabinet or ceiling. It was

In view of this problem, the present invention has an exhaust hood formed by a front cover wall at the front upper end of the front cover and an exhaust guide covering the upper surface of the heat exchanger, which is built in the upper part of the body so as not to be seen from the view. In the gas water heater, the discharge angle range of the exhaust gas flow from the exhaust hood is expanded to quickly disperse the high temperature exhaust gas flow, thereby quickly lowering the exhaust gas temperature by mixing with the cold air and improving safety. The purpose is to provide an exhaust hood.

[Means for Solving the Problems]

The exhaust hood of the gas water heater according to the present invention includes a front cover wall 2 formed at a front upper portion of a front cover 1 of the gas water heater.
In a gas water heater in which a built-in exhaust hood is constituted by an exhaust guide 4 provided to cover the upper surface of the heat exchanger 3,
The first specific invention is that the front cover wall 2 of the exhaust hood is formed by directly bulging arcuate walls 2a and 2b directly above the dual burners 5 and the like, and the arcuate walls 2a and 2b are formed. Corresponding to each burner 5a, 5b such as two gas burners 5 and the like, each exhaust burner 5a, 5b is provided with exhaust openings 2e, 2f directed obliquely forward and upward to expand the discharge angle range α ₁ in the left-right direction of the exhaust flow c. The second aspect of the present invention is such that the front cover wall 2 of the exhaust hood is formed by directly bulging arcuate walls 2a and 2b directly above the dual burner 5 and the like, and the arcuate wall 2a is formed. , 2b for each burner such as two gas burners 5
Corresponding to 5a and 5b, the respective front burners 5a and 5b are provided with exhaust openings 2e and 2f directed obliquely upward and frontward to expand the discharge angle range α ₁ in the left-right direction of the exhaust flow c, and the exhaust guide 4 changes the exhaust flow c This is a solution to the above-mentioned problems by adopting technical means in which the emission angle range θ ₁ in the vertical direction is also expanded.

[Operation] In the first specific invention having the above-mentioned configuration, the arc-shaped wall 2a, which is directly above the burners 5a, 5b of the two gas burners 5 etc. commonly used in the gas water heater, 2b are formed in a bulge in twos, and exhaust openings 2e, 2f are provided for each of the burners 5a, 5b to widen the discharge angle range α of the exhaust flow c in the left-right direction, and a tip formed of one front cover wall 2 '. Since the desired exhaust flow is made significantly larger than the discharge range α ₀ ′ in the left-right direction, the high temperature combustion exhaust from the dual burner 5 passes through the heat exchanger 3 and then the exhaust opening 2e by the walls 2a and 2b having an arc shape. , 2f is emitted diagonally upward and forward. Therefore, the exhaust resistance is eliminated, and since the opening area is wide, the discharge angle range α ₁ of the high temperature exhaust flow in the forward and obliquely upward direction is widened to the left and right, and since the exhaust flow is dispersed, it is quickly mixed with the cool air. Cooling.

In the second aspect of the invention, the arc-shaped walls 2a and 2b are bulged and formed directly above the burners 5a and 5b of the two gas burners 5 and the like to form the burners 5a and 5b separately. Since the exhaust openings 2e and 2f are provided to expand the discharge angle range α ₁ of the exhaust flow c in the left-right direction, and the exhaust guide plate 4 also expands the discharge angle range θ ₁ of the exhaust flow c in the vertical direction, The emission angle range α ₁ and θ ₁ of the high temperature exhaust gas flow spreads horizontally and vertically,
Since the dispersion of the exhaust gas flow is expanded, it is quickly mixed with cool air to be cooled, and early cooling of the hot exhaust gas flow is possible.

〔Example〕

An embodiment of an exhaust hood of a gas water heater according to the present invention will be described below with reference to the drawings.

Embodiment 1 In FIGS. 1 to 3, reference numeral 1 denotes a front cover of a gas water heater, each functional part of the gas water heater, for example, a heat exchanger 3, an inner shell 7, a double gas burner 5, a blinking light. The front cover 1 and the back cover 6 are provided so that they can be freely attached to and detached from the back cover 6 on which the operation section B and the like are installed.
And form the outer shell A of the body. Reference numeral 2 denotes a forwardly inclined front cover wall integrally formed on the front surface of the upper end of the front cover 1. In the first embodiment, the front cover wall 2 is provided directly above the burners 5a and 5b of the two gas burners 5. Two arcuate walls 2
a and 2b are continuously inclined forward to form two bulges, and the arc-shaped walls 2a and 2b are formed into two burners 5a,
Exhaust openings 2e and 2f are provided for each burner 5a and 5b corresponding to 5b, and the discharge angle range α ₁ in the left-right direction of the exhaust flow is expanded and enlarged. Since the high-temperature combustion exhaust gas is emitted and diffused from the two exhaust openings 2e and 2f without any obstacle, the emission angle range α ₁ spreads to the left and right, and the exhaust flow is dispersed, so that it is quickly mixed with the cool air and cooled immediately.

A heat exchanger 3 of a gas water heater is provided on the upper portion of the inner case 7. 4 is an exhaust guide covering the upper surface of the heat exchanger 3,
In the first embodiment, the base end is fixed to the back part of the heat exchanger 3, and the guide plate 4a is provided obliquely on the upper surface of the heat exchanger 3 so as to project upward. In the figure, 9 is a push button type operation knob of the blinking operation section B, 10 is a slide type capacity adjustment knob, 11 is a tap for hot water, and 14 is a gas nozzle.

Further, exhaust ports 13 and 13 are provided between the side end of the exhaust guide 4 and the side surface of the upper surface opening 12 of the body shell A so that a part of the exhaust flow is discharged upward from the exhaust ports 13 and 13. I am doing it.

In addition, the case where the exhaust opening by the front cover wall 2 is one and
Comparing the case of two exhaust openings, Figs. 4 and 5
As illustrated in the figure, in the case of one, the exhaust flow c is slightly narrowed at the exhaust opening 2e, so the discharge angle range α ₀ becomes narrower, but in the case of two, the exhaust opening for each burner 5a, 5b is reduced.
Since it has 2e and 2f, and its opening area is wide and exhaust resistance does not occur, the exhaust flow c is straightly discharged and diffused, and its discharge angle range α ₁ is widened and its dispersion is improved. 4 and 5, a and b are combustion flames of the dual gas burner 5.

Embodiment 2 Referring to FIGS. 6 to 8, the front cover wall 2 of the exhaust hood is shown.
Is made double, and the exhaust guide 4 is made up of three guide plates 4a, 4b,
The structure and operation other than the point 4c are the same as those of the first embodiment, and the same portions are denoted by the same reference numerals and the description thereof is omitted. The guide plate 4 according to the second embodiment includes a first guide plate 4a having a base end fixed to the back portion of the heat exchanger 3 and projecting upwardly on the upper surface of the heat exchanger 3 in an oblique shape, and the first guide plate 4a. Between the 1st guide plate 4a and the upper surface of the heat exchanger 3, the 1st guide plate 4a is provided with a 2nd guide plate 4b and a 3rd guide plate 4c whose inclination angles are different from each other. Individual ventilation gaps between
4e, 4f, 4g exist and are integrally fixed on both sides by connecting pieces 8, 8 and the exhaust guide 4 is formed in three stages with three guide plates 4a, 4b, 4c having different inclination angles, and exhaust is provided. The discharge angle range θ ₁ in the vertical direction of the flow c is expanded. Needless to say, the means for expanding the vertical discharge angle range θ ₁ of the exhaust flow c by the exhaust guide 4 is not limited to that of the second embodiment.

If the structure in which the front cover wall 2 diffuses the high temperature exhaust flow to the left and right and the exhaust guide 4 vertically diffuses as in the second embodiment, early cooling of the high temperature exhaust flow can be effectively performed. .

〔The invention's effect〕

According to the present invention, an exhaust hood formed by a front cover wall 2 at the front upper part of the front cover and an exhaust guide 4 covering the upper surface of the heat exchanger 3 is built in the upper part of the body so as not to be seen from the view. In the water heater, the exhaust gas discharge angle range from the exhaust hood is expanded to promptly disperse the high temperature exhaust flow and accelerate the decrease in exhaust temperature due to mixing with cold air. Because it is done in
Even if the gas water heater is installed close to, for example, a hanging cabinet or ceiling provided at the top of a kitchen sink, etc., it can be used safely without the risk of heating the hanging cabinet or ceiling due to exhaust heat. Is.

[Brief description of drawings]

FIG. 1 is a perspective view of the first embodiment, FIG. 2 is a vertical sectional side view, and FIG.
FIG. 6 is a partially cutaway plan view, FIGS. 4 and 5 are schematic front views showing a state of discharge of an exhaust flow from an exhaust opening by a front cover wall, FIG. 6 is a perspective view of a second embodiment, and FIG. Is a vertical side view,
FIG. 8 is a partially cutaway plan view, FIG. 9 is a perspective view of the device of the prior application, FIG. 10 is a vertical side view, FIG. 11 is a plan view, and FIG. 12 is a perspective view of a conventional example. 1 ... Front cover, 2 ... Front cover wall, 3 ... Heat exchanger, 4 ... Exhaust guide, 5 ... Dual gas burner, α ₁ ...
... emission angle range, θ ₁ ... emission angle range.

Claims (2)

[Claims] 1. A front cover (1) for a gas water heater.
Front cover wall (2) and heat exchanger (3) formed on the upper front part of the
In a gas water heater in which a built-in exhaust hood is constituted by an exhaust guide (4) provided so as to cover the upper surface of the exhaust hood, a front cover wall (2) of the exhaust hood is made to correspond to a dual gas burner (5) and the like. An exhaust hood for a gas water heater, wherein the exhaust hood of the gas water heater is formed so as to bulge in two lines and expand the discharge angle range α ₁ in the left-right direction of the exhaust flow (c). 2. A front cover (1) for a gas water heater.
Front cover wall (2) and heat exchanger (3) formed on the upper front part of the
In a gas water heater in which a built-in exhaust hood is constituted by an exhaust guide (4) provided so as to cover the upper surface of the exhaust hood, a front cover wall (2) of the exhaust hood is made to correspond to a dual gas burner (5) and the like. The bulges are formed in two lines to expand the discharge angle range α ₁ in the left-right direction of the exhaust flow (c), and also expand the discharge angle range θ ₁ in the up-down direction of the exhaust flow (c) by the exhaust guide (4). Exhaust hood of gas water heater characterized by that.