CN202209775U - Congealed high-efficient gas water heater - Google Patents

Abstract

The utility model discloses a condensing high-efficiency gas water heater, which comprises a water tank, a burner arranged on the lower side of the water tank, a smoke exhaust hood arranged outside the water tank and having a smoke exhaust gap with the water tank, longitudinally penetrating through the The heat exchange smoke pipe of the water tank and the insulation layer and shell covering the outside of the smoke exhaust hood. The smoke exhaust hood has an exhaust port that communicates with the atmosphere. There are at least two heat exchange smoke pipes, and they are located at One end of the bottom of the water tank avoids the position of the burner. The utility model fundamentally solves the problems of corrosion of the burner by condensed water, worsened combustion conditions caused by condensed water, reduced flame temperature and energy, and improves thermal efficiency.

Description

Condensing High Efficiency Gas Water Heater

technical field

The utility model relates to the technical field of gas water heaters, in particular to a condensing high-efficiency gas water heater.

Background technique

With the continuous development of science and technology and the improvement of people's living standards, the demand for hot water in people's daily life has greatly increased. Water heaters and gas water heaters are widely used by people, especially gas volume water heaters have gradually entered thousands of households. .

When an ordinary gas water heater is working, it will emit a large amount of flue gas with a temperature as high as 180°C. Ordinary water heaters cannot use this part of the heat and it is wasted in vain. The heat transfer makes the fuselage obviously hot, and it is impossible to stay on the fuselage when touched by hand. The key to condensing technology lies in the high-efficiency condensing heat exchanger. The cold water inlet pipe of the water heater is close to the condensing heat exchanger. When the discharged high-temperature flue gas passes through the condensing heat exchanger, most of the heat is absorbed by the condensing heat exchanger. Preheating the cold water in the water inlet pipe is equivalent to preheating the cold water before the ordinary gas water heater. It is worth noting that the heat used to preheat the cold water is not obtained by burning gas, but by using the smoke that cannot be recovered The heat in the air, so as to achieve the effect of energy saving and environmental protection, so that the temperature of the exhausted flue gas is only about 60 ℃, and when it is transferred to the fuselage, the temperature has dropped. Can stay on the fuselage completely.

However, because the condensing water heater needs to use the latent heat in the flue gas, it will inevitably reduce the exhaust gas temperature, thereby generating condensed water, and the acid gas in the flue gas will dissolve in the condensed water to form acidic condensed water. Therefore, condensing gas water heaters using indirect heat exchange have two technical problems different from ordinary water heaters: one is the generation and discharge of acidic condensed water; the other is the corrosion of the surface of the heat exchanger by acidic condensed water.

During the heating process of existing condensing water heaters, the condensed water generated by the heat exchange pipe inevitably drips/flows downward along the inner wall of the heat exchange pipe, and the heat exchange pipe is usually installed above the burner, and the high temperature flue gas passes upward through the water tank A heat exchange pipe on the central vertical central axis absorbs the heat exchange and then discharges it. The corrosive condensed water will drip onto the burner and the combustion flame. The condensed water has a corrosive effect on the burner, which will eventually lead to poor combustion conditions, lower flame temperature, and then reduce thermal efficiency.

Therefore, how to avoid the corrosion of the burner by the corrosive condensed water and improve the heat exchange efficiency has become an important technical problem to be solved urgently by those skilled in the art.

Utility model content

In view of this, the purpose of the utility model is to provide a condensing high-efficiency gas water heater, which can avoid the corrosion of the burner by the condensed water with corrosive effect, and improve the heat exchange efficiency.

In order to achieve the above object, the utility model provides the following technical solutions:

A condensing high-efficiency gas-fired water heater, comprising a water tank, a burner arranged on the lower side of the water tank, a smoke exhaust hood arranged outside the water tank and having a smoke exhaust gap with the water tank, and a heat exchange smoke hood that runs through the water tank longitudinally. pipe, and the insulation layer and shell covering the outside of the fume exhaust hood, the fume exhaust hood has an exhaust port connected to the atmosphere, and there are at least two heat exchange pipes, which are located at the bottom of the water tank One end avoids the position of the burner.

Preferably, in the above-mentioned condensing high-efficiency gas water heater, the exhaust hood specifically includes:

a shunt cover at the top, a shunt cavity is formed between the shunt cover and the top of the water tank;

A condensing hood located on the lower side of the shunting hood and connected to the shunting hood, a condensing chamber is formed between the condensing hood and the side wall of the water tank, and the condensing chamber communicates with the shunting chamber.

Preferably, in the above-mentioned condensing high-efficiency gas water heater, the exhaust hood further includes a return hood arranged at the lower part of the insulation layer, a return cavity is formed between the return cover and the condensation cover, and the return cavity is respectively connected to the The exhaust port communicates with the condensation chamber.

Preferably, in the above-mentioned condensing high-efficiency gas water heater, the shunt cover has a protrusion extending toward the heat exchange smoke pipe.

Preferably, in the above-mentioned condensing high-efficiency gas water heater, the heat exchange smoke pipes are evenly arranged around the burner.

Preferably, in the above-mentioned condensing high-efficiency gas water heater, there are three heat exchange smoke tubes.

It can be seen from the above technical solutions that the condensing high-efficiency gas water heater provided by the utility model changes the position distribution of the heat exchange pipes, cancels the central smoke pipe on the vertical central axis of the water tank, and adds two or more heat exchange pipes. The position distribution of the hot smoke pipe is required to avoid the position of the burner. The condensed water produced by the heat exchange pipe in the heating process of the condensing high-efficiency gas water heater inevitably drips/flows downward along the inner wall of the heat exchange pipe. The utility model changes the position of the heat exchange pipe to bypass the burner and combustion flame, ensuring that condensate no longer drips onto the burner and combustion flame. It fundamentally solves the corrosion of the burner by condensed water, the deterioration of combustion conditions caused by condensed water, the reduction of flame temperature and energy, and improves the thermal efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of a condensing high-efficiency gas water heater provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a condensing high-efficiency gas water heater provided by another embodiment of the present invention.

Detailed ways

The utility model discloses a condensing high-efficiency gas water heater, which can avoid the corrosion of the burner by the condensed water with corrosive effect, and improve the heat exchange efficiency.

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Figure 1 and Figure 2, Figure 1 is a schematic structural diagram of a condensing high-efficiency gas water heater provided by an embodiment of the utility model; Figure 2 is a schematic structural diagram of a condensing high-efficiency gas water heater provided by another embodiment of the utility model.

The condensing high-efficiency gas water heater provided by the embodiment of the utility model includes a water tank 8 , a burner 6 , a smoke exhaust hood, a heat exchange pipe 9 , an insulating layer 10 and a casing 11 . Wherein, the water tank 8 is used to hold cold water, and the burner 6 is arranged on the lower side of the water tank 8 for heating the cold water in the water tank 8 . The smoke exhaust hood is arranged on the outside of the water tank 8 and has a smoke exhaust gap with the water tank 8, and the smoke exhausted by the heat exchange smoke pipe 9 is discharged through the smoke exhaust gap. The heat exchange smoke pipe 9 runs through the water tank 8 longitudinally, and the two ends pass through the top and the bottom of the water tank 8 respectively. The insulation layer 10 and the shell 11 are covered on the outside of the exhaust hood. The exhaust hood has an exhaust port 4 communicating with the atmosphere, and there are at least two heat exchange pipes 9, and one end of the smoke exhaust pipe at the bottom of the water tank 8 avoids the burner 6 positions.

The diameter of the distribution position of the heat exchange pipes 9 should be appropriate. The distribution diameter of multiple heat exchange pipes 9 is less than or equal to the diameter of the burner in the center of the water tank. Condensed water will affect the burner 6. The distribution of multiple heat exchange pipes 9 If the position diameter is too large, the heat transfer effect will be reduced.

The condensing high-efficiency gas water heater provided by the utility model changes the position distribution of the heat exchange smoke pipe 9, cancels the central smoke pipe on the vertical central axis of the water tank, and adds two or more heat exchange smoke pipes 9, and its position distribution It is required to avoid the position of the burner 6 . The condensed water produced by the heat exchange pipe 9 during the heating process of the condensing high-efficiency gas water heater inevitably drips/flows downward along the inner wall of the heat exchange pipe 9. The utility model changes the position of the heat exchange pipe 9 to avoid burning The burner 6 and the combustion flame ensure that the condensed water can no longer drip onto the burner 6 and the combustion flame. The utility model fundamentally solves the problems of corrosion of the burner 6 by the condensed water, deterioration of the combustion condition caused by the condensed water, reduction of the flame temperature and energy, and improves the thermal efficiency.

The exhaust hood disclosed in the above embodiments may specifically include a distribution hood 1 and a condensation hood 2 . Wherein, the shunt hood 1 is located on the top of the water tank 8, and a shunt chamber is formed between the shunt shroud 1 and the top of the water tank 8, and the flue gas flowing out along the top of the heat exchange pipe 9 is shunted by the shunt shroud 1, and flows down along the shunt chamber . The condensation cover 2 is located at the lower side of the distribution cover 1 and is connected with the distribution cover 1. A condensation chamber 3 is formed between the condensation cover 2 and the side wall of the water tank 8, and the condensation chamber 3 communicates with the distribution chamber. After being diverted by the shunt cover 1 , the flue gas flows downward along the condensation chamber 3 between the condensation cover 2 and the side wall of the water tank 8 until it is discharged through the exhaust port 4 .

In order to further optimize the above-mentioned technical scheme, the exhaust hood provided by the utility model can also include a return hood 5 arranged at the bottom of the insulation layer 10, and a return cavity 7 is formed between the return cover 5 and the condensation cover 2, and the return cavity 7 is connected with the exhaust gas respectively. Port 4 communicates with condensation chamber 3 . The utility model can ensure that the length of the condensing cavity 3 is long enough by setting the reflux hood 5, and improve the heat exchange efficiency. 7 flows upward until it is discharged through the exhaust port 4.

The shunt hood 1 has a protrusion extending toward the heat exchange smoke pipe 9. The heat energy and high-temperature flue gas released by the burner 6 first pass through the bottom of the water tank 8 for the first heat exchange, and then pass through the heat exchange smoke pipe 9 for the second time. Heat exchange, after the waste heat and high-temperature flue gas that has passed the secondary heat exchange are blocked by the protrusion of the shunt cover 1 at the upper port of the heat exchange pipe 9, it reverses downward through the shunt cover 1, and meets the outer wall of the water tank 8 in the condensation chamber 3 The heat exchange is carried out again, the waste heat and high-temperature flue gas are fully absorbed, and the temperature of the flue gas drops below the dew point temperature of the water vapor, and a certain amount of condensed water will be produced at this time. Condensed water will flow into the water collecting pan at the bottom along the inner and outer walls of the condensation chamber 3 .

The heat exchange smoke pipes 9 are evenly arranged around the burner 6 . In a preferred solution of the present invention, there are three heat exchange smoke pipes 9 .

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A condensing high-efficiency gas water heater, comprising a water tank (8), a burner (6) arranged on the lower side of the water tank (8), arranged on the outside of the water tank (8) and having a The smoke exhaust hood in the smoke exhaust gap, the heat exchange pipe (9) that runs through the water tank (8) longitudinally, and the insulation layer (10) and shell (11) that are coated on the outside of the smoke exhaust hood, the smoke exhaust The hood has an exhaust port (4) that communicates with the atmosphere, and it is characterized in that there are at least two heat exchange smoke pipes (9), and one end of them located at the bottom of the water tank (8) avoids the burner ( 6) The location. 2. The condensing high-efficiency gas water heater according to claim 1, wherein the exhaust hood specifically comprises: A shunt cover (1) at the top, a shunt cavity is formed between the shunt cover (1) and the top of the water tank (8); A condensation cover (2) located on the lower side of the distribution cover (1) and connected to the distribution cover (1), forming a condensation cavity between the condensation cover (2) and the side wall of the water tank (8) (3), the condensation chamber (3) communicates with the distribution chamber. 3. The condensing high-efficiency gas water heater according to claim 2, characterized in that, the exhaust hood further comprises a return hood (5) arranged at the lower part of the insulation layer (10), and the return hood (5) and A return cavity (7) is formed between the condensation covers (2), and the return cavity (7) communicates with the exhaust port (4) and the condensation cavity (3) respectively. 4. The condensing high-efficiency gas water heater according to claim 3, characterized in that, the shunt cover (1) has a protrusion extending toward the heat exchange smoke pipe (9). 5. The condensing high-efficiency gas water heater according to any one of claims 1-4, characterized in that, the heat exchange smoke pipes (9) are uniformly arranged around the burner (6). 6. The condensing high-efficiency gas water heater according to claim 5, characterized in that there are three heat exchange smoke pipes (9).

Images