JP2542895B2 - Generator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a generator, and more particularly to a direct-fired generator (hereinafter, simply referred to as a generator) used in an absorption refrigerator.

(B) Conventional technology As a conventional technology of a generator used in an absorption refrigerator, as shown in Japanese Patent Laid-Open No. 59-49495, a plurality of solution tubes are arranged in a flue in a grid pattern for combustion gas. Alternatively, there is one in which the combustion gas from the burner and the absorbing liquid are heat-exchanged by arranging them in a staggered pattern.

(C) Problems to be Solved by the Invention In the above-mentioned generator, when liquid fuel is used, unburned matter of this liquid fuel is apt to adhere to the solution pipe, and thermal efficiency is lowered by the adhesion of the unburned matter. It is necessary to remove unburned materials. In the case of the generator in which the solution tubes are arranged in a grid pattern, a brush or the like can be inserted, so that the unburned substances of the fuel can be easily removed.

However, in the generator in which the solution pipes are arranged in a grid pattern, it is easy to remove the unburned material of the fuel, but it flows between the solution pipes and does not exchange heat with the solution pipes. There was a problem that the thermal efficiency deteriorated due to the exhausted combustion gas.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a generator having a structure capable of easily removing unburned materials of fuel in a flue and having high thermal efficiency. .

(D) Means for Solving the Problems The present invention has a structure for heating the absorbing liquid by providing a flue passage through which the combustion gas from the burner passes in the absorbing liquid in order to solve the above-mentioned problems of the prior art. In a generator of an absorption refrigerator, a partition plate for dividing the inside of the flue into a plurality of combustion gas flow paths or a plate surface-treated to release radiant heat is provided in the flue, and a baffle is attached to this plate. It is a thing.

(E) Operation In the generator of the present invention, the temperature of the partition plate or the plate processed so as to release radiant heat rises due to the heat of the combustion gas during use, and the plate absorbs heat Radiant heat is emitted to the inner wall surface of the road. The release of the radiant heat promotes the heat exchange in the generator. Further, since the flow path of the combustion gas is disturbed by the baffle attached to the plate, the heat exchange amount to the heat absorbing surface is increased.

(F) Embodiment FIG. 1 is a cutaway perspective view of an essential part showing an embodiment of a generator for an absorption refrigerator according to the present invention.

In FIG. 1, (1) is a body of a generator, a combustion chamber (2) is formed in the body, and the combustion chamber (2) is formed.
A burner (not shown) is mounted on the body barrel (1) so as to face the front. (3) communicates with the downstream side of the combustion chamber (2), and
A flue whose cross section is formed by a vertically elongated elliptical tube above it, and multiple flues are lined up horizontally. The absorbing liquid in the generator is heated by the heat of the combustion gas passing through the inside of the flue (3), and the space between the flue (3) and the flue (3) and the flue (3)
Flows between the body and the body (1). (4) is a smoke chamber communicating with the flue (3), and the smoke chamber is provided with a chimney (5). And, in the space surrounded by the inner wall of the vessel (1), the outer wall of the combustion chamber (2) and the outer wall of the flue (3), a liquid phase part of the absorbing liquid [lithium bromide aqueous solution] [hereinafter referred to as a solution storage part] And a vapor phase portion of the refrigerant vapor (water vapor) separated from the absorbing liquid.

In addition, (6) is a cradle for the body barrel (1), (7) is a steam chamber formed in the upper part of the body barrel (1), (8) is a smoke chamber so as to face the flue (3) ( 4) A lid formed on the outer wall, which is detachably attached to the smoke chamber with bolts (9). (10) is a handle attached to the lid (8).

FIG. 2 is an explanatory view of a radiant heat emission plate. This plate (11) is made of stainless steel having heat resistance, and the surface thereof is coated with an application agent (for example, a ceramic coating) that facilitates emission of radiant heat. Has been done. And the plate (1
1) is detachably installed in the flue (3). (1
2) (13) (14) (15) are the baffles attached to this plate (11), the upper baffle on the flue upstream side, the lower baffle on the flue upstream side, and the flue downstream side, respectively. The upper baffle and the lower baffle on the downstream side of the flue are shown. Baffle (1
4) (15) is smaller in area than the baffles (12) (13) on the upstream side of the flue, and the baffles (13) (15) on the lower side of the flue are the baffles (12) on the upper side of the flue. (14) The area is smaller than that of (14). Various methods such as providing a notch or making a hole can be considered as a method of forming the baffle area small.

FIG. 3 is a sectional explanatory view of the generator shown in FIG.
In FIG. 3, (16) is a fixing member for fixing the plates (11) to each other, and (17) is a mounting member for mounting the fixing member (16) on the inner wall of the smoke chamber (4). The interval (A) between the baffles (15) and (15) on the downstream side of the flue is formed more closely than the interval (B) between the baffles (13) and (13) on the upstream side of the flue.
The angle (C) formed by the baffles (12), (13), (14), (15) and (11) is about 90 °, but this angle (C)
May be changed to change the flow of the combustion gas.

In the generator having the above configuration, when using
The heat of the combustion gas flowing in the flue (3) causes the absorbing liquid to boil and separate the water vapor. Then, the absorbing liquid moves from the lower part to the upper part in the solution storing part together with the generated bubbles of water vapor, and the absorbing liquid is stirred while convection in the solution storing part.
As a result, the homogenization of the lithium bromide concentration of the absorbing liquid in the solution storage section is promoted.

Further, in the generator of the present invention, since the radiant heat release plate (11) is provided in the flue (3), the temperature of the plate (11) is increased by convective heat transfer during use of the generator. By raising and releasing radiant heat (far infrared rays when the plate (11) is coated with ceramic paint) on the heat absorbing surface (inner wall of flue), there is no radiant heat emitting plate in the conventional flue It is designed to promote heat exchange compared to the generator.

Further, since the combustion gas passing through the inside of the flue (3) flows through heat exchange with the absorbing liquid through the inner wall surface of the flue (3), the downstream side of the flue (3) is upstream of the flue (3). The temperature is higher than the side. Further, since the combustion gas having a high temperature is light, it flows through the upper side of the flue (3). If the baffle spacing is close, the flow of the combustion gas is further disturbed to increase the combustion amount (although the pressure loss is slightly increased). Further, when the baffle area is formed smaller, the flow of the combustion gas is more disturbed than in the flue portion where the baffle area is formed large, and the amount of heat exchange is increased.

In the generator of the present invention, the amount of heat exchange is increased in a portion where the temperature of the combustion gas flowing in the flue (3) is low, for example, in the lower side or the downstream side of the flue (3), and the amount of heat exchange is increased as compared with the conventional generator. It is possible to heat the absorption liquid in the solution storage portion more uniformly and to cause the entire absorption liquid to flow.

Further, in the present invention, by removing the plate (11) from the inside of the flue (3), the unburned material of the fuel adhering to the inner wall surface of the flue (3), such as carbon and sulfur, is brushed or the like. It is possible to provide a generator that can prevent a decrease in thermal efficiency over a long period of time because it can be easily removed.

(G) Effect of the Invention In the generator of the present invention, a partition plate provided in the flue or a plate surface-treated to release radiant heat during use thereof radiates radiant heat to accelerate heat transfer. The
In addition, the baffle attached to the plate disturbs the flow path of the combustion gas and increases the amount of heat exchange in the generator. In the present invention, it is possible to provide a generator with high thermal efficiency by promoting heat transfer and increasing the amount of heat exchange.

Further, when the plate is removed from the inside of the flue, unburned materials of fuel adhering to the inner wall surface of the flue can be removed by inserting a brush or the like as if the plate was inserted, so that thermal efficiency is reduced over a long period of time. It is possible to provide a generator that can be prevented.

[Brief description of drawings]

FIG. 1 is a cutaway perspective view of an essential part showing an embodiment of a generator for an absorption refrigerator according to the present invention, FIG. 2 is an explanatory view of a plate for radiant heat emission, and FIG. 3 is a sectional explanatory view in FIG. Is. (3) ...... Flue, (11) ...... Plate for radiant heat emission, (1
2), (13), (14), (15) …… Baffles, (16)…
… Fixing member, (17) …… Mounting member.

Claims (2)

(57) [Claims] 1. A generator of an absorption refrigerating machine having a structure in which a flue passage through which a combustion gas from a burner passes is provided in an absorbing liquid to heat the absorbing liquid, and the flue is divided into a plurality of combustion gas passages. The generator is characterized in that a board for use is provided in the flue and a baffle is attached to the partition board. 2. In a generator of an absorption refrigerating machine having a structure in which a flue passage through which combustion gas from a burner passes is provided in the absorbing liquid, the plate surface-treated so as to release radiant heat is smoked. A generator that is provided inside the road and has a baffle attached to this plate.