CN201421184Y - Gas fireplace - Google Patents

Abstract

The utility model relates to a gas fireplace, comprising: a shell, a circulation fan, a smoke exhaust fan, a combustion box assembly and a heat exchange tube for heating air, the heat exchange tube is connected to the combustion box assembly In addition, it also includes a return pipe for preheating air arranged in the casing, the return pipe is respectively connected with the circulation fan and the smoke exhaust fan, and the return pipe is connected with the heat exchange pipe, and the return pipe 1. A gas circulation channel is formed in the heat exchange tube; the combustion box assembly ignites the gas to generate high-temperature flue gas, heats the heat exchange tube and the recovery tube in turn, then cools down and is discharged outside by the smoke exhaust fan, and the circulation fan introduces cold air into the gas circulation channel , through the primary preheating of the recovery tube and the secondary heating of the heat exchange tube, the temperature is raised into hot air and discharged into the room. The gas fireplace of the utility model is provided with a return pipe, and the heat of the high-temperature flue gas is used to heat the air twice, thereby improving thermal efficiency and effectively saving energy.

Description

gas fireplace

technical field

The utility model relates to the field of gas fireplaces, in particular to a gas fireplace capable of heating air twice.

Background technique

In the cold winter, people often need to consume more energy for heating. At present, people often use electric heaters, water heaters, etc. for heating. More and more people are paying attention to it, but due to the small demand for gas fireplaces in the domestic market in the past, the technological development of gas fireplaces is relatively lagging behind. Therefore, how to design and improve gas fireplaces, improve thermal efficiency, and realize gas savings Use has become a common concern in the industry.

Existing gas fireplaces are installed indoors, including shells, circulation fans, heat exchange pipes, smoke exhaust fans, combustion box assemblies and gas valves located in the shells. (NG) and natural gas (LPG) are used as energy sources. The atmospheric combustion method is adopted. The air is taken from the room through the circulating fan. After heating up, it flows into the room through the circulation fan, and the combustion flue gas is discharged outside through the smoke exhaust fan. However, during the research and development process of the inventor, it was found that the flue gas discharged at this time also has relatively high heat energy. The temperature of the flue gas can reach 160 ~ 180 degrees Celsius, and the thermal efficiency achieved by gas combustion is only about 80%, so at this time the flue gas is directly discharged outside, which wastes energy and causes pollution to the ambient temperature.

Utility model content

The technical problem to be solved by the utility model is that, aiming at the above-mentioned existing gas fireplace, the air is only heated once through the heat exchange tube, the thermal efficiency is not high, and the high-temperature flue gas cannot be effectively used, and a gas fireplace is provided. The tube can realize the double heating of the air, improve the thermal efficiency, and achieve the purpose of saving energy.

The technical solution adopted by the utility model to solve the technical problem is to provide a gas fireplace, including: a shell, a circulating fan, a smoke exhaust fan, a combustion box assembly, and a heat exchange tube for heating the air , the heat exchange pipe is connected with the combustion box assembly, and also includes a return pipe for preheating air arranged in the casing, the return pipe is respectively connected with the circulation fan and the smoke exhaust fan, and, the The return pipe is connected with the heat exchange pipe, and a gas circulation channel is formed in the return pipe and the heat exchange pipe;

The combustion box assembly ignites the gas to generate high-temperature flue gas, heats the heat exchange pipe and the return pipe in turn, then cools down and is discharged outside through the smoke exhaust fan. And the secondary heating of the heat exchange tube heats up into hot air and discharges it into the room.

In the gas fireplace described in the present invention, heating fins are arranged outside the return pipe; the return pipe is a stainless steel pipe, and the heating fin is an aluminum sheet.

In the gas fireplace described in the present utility model, a cavity is provided in the housing, and the cavity is divided into an upper cavity and a lower cavity by a partition, the circulation fan is set in the lower cavity, and the heat exchange The pipe and the return pipe are arranged on one side of the upper chamber, the return pipe is connected to the bottom of the heat exchange pipe, the exhaust fan and the combustion box assembly are arranged on the other side of the upper chamber, and the exhaust fan is located in the combustion box below the component.

In the gas fireplace described in the utility model, a coil assembly for collecting flue gas condensed water is arranged between the return pipe and the exhaust fan.

In the gas fireplace described in the present utility model, the exhaust fan is provided with a flue gas outlet, and the flue gas outlet is connected with the return pipe, and the flue gas outlet is provided with a smoke exhaust pipe and passes through the smoke exhaust pipe. Connected to the outside.

In the gas fireplace described in the utility model, a gas valve for controlling gas output is also provided in the housing, and the gas valve is connected to the lower part of the combustion box assembly

In the gas fireplace described in the utility model, one side of the combustion box assembly is connected with the gas valve, and the other side is connected with the heat exchange pipe, and a burner and an igniter are arranged inside and externally connected to a power supply.

In the gas fireplace described in the present utility model, the middle part of the lower end of the circulation fan is provided with an air inlet for introducing cold air, and the upper end of the housing is correspondingly provided with an air outlet for sending out hot air. The upper end is connected with the return pipe, and the air inlet communicates with the air outlet through the return pipe and the heat exchange pipe.

The gas fireplace of the utility model is provided with a return pipe, the combustion flue gas enters the return pipe through the heat exchange pipe, and the heating fins on the return pipe absorb the temperature of the combustion flue gas, so that the air introduced by the circulating fan is preheated by the return pipe once. The secondary heating of the heat exchange tube is obtained, so that the flue gas is discharged at an extremely low temperature (the temperature is less than 55°C), which reduces the pollution to the ambient temperature. At the same time, by effectively using the heat of the flue gas, the thermal efficiency of the gas is improved (thermal efficiency up to 95%), can effectively save and utilize energy.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the schematic diagram of the preferred embodiment of the utility model gas fireplace;

FIG. 2 is a schematic diagram of the heat exchange tube and the recovery tube shown in FIG. 1 .

Detailed ways

As shown in Figure 1, it is a schematic diagram of a preferred embodiment of the utility model gas fireplace. The gas fireplace includes: a casing 1 , and a circulation fan 2 , a heat exchange pipe 3 , a return pipe 7 , a smoke exhaust fan 4 , a combustion box assembly 5 , and a gas valve 6 arranged in the casing 1 .

The casing 1 is provided with a cavity, and the cavity is divided into an upper cavity 13 and a lower cavity 14 by a partition 12 . The heat exchange pipe 3 and the return pipe 7 are arranged on one side of the upper cavity 13, the return pipe 7 is connected below the heat exchange pipe 3, and a gas circulation channel is formed in the return pipe 7 and the heat exchange pipe 3. The exhaust fan 4, the combustion box assembly 5, and the gas valve 6 are arranged on the other side of the upper cavity 13, and the gas valve 6 is connected to the bottom of the combustion box assembly 5 for controlling the gas output; the combustion The box assembly 5 is provided with an igniter and a burner (not shown) and is connected to an external power supply. The igniter is used to ignite gas, and the burner is used to burn gas. The other side is connected with the heat exchange tube 3. After the combustion box assembly 5 is fed with gas, the igniter ignites and burns, and the burner works. The high-temperature combustion flue gas enters the heat exchange tube 3 and enters through the heat exchange tube 3. Return pipe 7; the smoke exhaust fan 4 is located below the combustion box assembly 5 and the gas valve 6, and is used to discharge smoke, and a smoke outlet 41 is provided on it, and the smoke outlet 41 communicates with the recovery pipe 7, and The smoke outlet 41 is connected with a plastic smoke exhaust pipe and communicates with the outside through the plastic smoke exhaust pipe (not shown). The circulating fan 2 is arranged in the lower cavity 14, and the middle part of its lower end is provided with an air inlet 21 for introducing cold air, and the upper end of the housing 1 is correspondingly provided with an air outlet 22 for sending hot air. The upper end is connected with the return pipe 7 , and the air inlet 21 communicates with the air outlet 22 through the return pipe 7 and the heat exchange pipe 3 .

The improvement of the utility model is that a return pipe 7 is provided, which is connected with the heat exchange pipe 3, and is used for twice heating of the cold air introduced by the circulating fan 2. Referring to Fig. 2, it is a schematic diagram of the heat exchange tube and the recovery tube in Fig. 1, the recovery tube 7 is connected to the bottom of the heat exchange tube 3, and the high-temperature combustion flue gas enters the recovery tube 7 through the heat exchange tube 3, and the recovery tube 7 The heating fins 71 absorb the temperature of the combustion flue gas. In this embodiment, the recovery pipe 7 is made of a stainless steel tube with high corrosion resistance and high temperature resistance, and a heating fin 71 is arranged on the outside thereof, and the heating fin 71 is an aluminum sheet . In addition, a coil assembly 8 is provided between the recovery pipe 7 and the smoke exhaust fan 4. In this embodiment, the coil assembly 8 is a coil plastic plate connected with a plastic exhaust pipe for condensation of smoke. collection of water. Combustion box assembly 5 ignites the gas to generate high-temperature flue gas. The high-temperature flue gas passes through the heat exchange pipe 3, and then passes through the heating fin 71 on the recovery pipe 7 to absorb heat and further cool down. The condensed water in the combustion flue gas in the smoke exhaust pipe is discharged through the plastic smoke exhaust pipe, and the condensed water in the return pipe flows into the plastic plate of the coil, and then is discharged through the plastic smoke exhaust pipe. The circulation fan 2 works to force the cold air from the circulation The air inlet 21 of the fan 2 is introduced into the gas circulation channel. After the first preheating of the recovery pipe 7 and the second heating of the heat exchange pipe 3, the temperature is raised to become hot air and flows into the room from the air outlet 22. Finally, the burned flue gas is extremely Low temperature discharge, greatly reducing heat loss. At this time, according to the test data, the temperature of the exhausted flue gas is not higher than 55°C, which reduces the pollution to the ambient temperature, and the thermal efficiency of the gas has reached 95%, which effectively saves and utilizes energy. It is worth mentioning that other parts and structures of the gas fireplace are similar to those of the prior art, and will not be repeated here.

When working, turn on the power and gas, turn on the wind pressure switch, run the smoke exhaust fan 4, turn off the wind pressure switch, pre-purify, the igniter starts to ignite, the gas valve 6 opens, the burner starts to work, and the high-temperature flue gas burned by the burner Heat the heat exchange pipe 3 and the return pipe 7, the circulation fan 2 works, introduce cold air, pass through the heat exchange pipe 3 and the return pipe 7, absorb heat, and discharge it into the room in the form of hot air, and the combustion smoke passes through the smoke exhaust fan 4 Exhausted outside, the water vapor in the combustion flue gas is discharged in the form of liquid water.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (9)

1, a kind of gas firing wall, comprise: housing (1), be located at the circulating fan (2) in the housing (1), smoke exhaust fan (4), burner box assembly (5), and the heat-exchange tube (3) that is used to add hot-air, described heat-exchange tube (3) is connected with burner box assembly (5), it is characterized in that, also comprise the answer pipe of being located in the housing (1) (7) that is used to preheat air, described answer pipe (7) is connected with circulating fan (2) and smoke exhaust fan (4) respectively, and, described answer pipe (7) is connected with heat-exchange tube (3), replys pipe (7), heat-exchange tube is formed with the gas communication passage in (3).

2, gas firing wall according to claim 1 is characterized in that, described answer pipe (7) outside is provided with heating fin (71).

3, gas firing wall according to claim 2 is characterized in that, described answer pipe (7) is a stainless steel tube, and described heating fin (71) is an aluminium flake.

4, gas firing wall according to claim 1, it is characterized in that, described housing is established cavity in (1), described cavity is divided into upper cavity (13) and lower chamber (14) by dividing plate (12), described circulating fan (2) is located in the lower chamber (14), described heat-exchange tube (3), answer pipe (7) are located at a side of upper cavity (13), reply and manage the below that (7) are connected in heat-exchange tube (3), described smoke exhaust fan (4), burner box assembly (5) are located at the opposite side of upper cavity (13), and described smoke exhaust fan (4) is positioned at the below of burner box assembly (5).

5, gas firing wall according to claim 4 is characterized in that, is provided with the coil pack (8) that is used to collect flue gas condensing water between described answer pipe (7) and the smoke exhaust fan (4).

6, gas firing wall according to claim 4 is characterized in that, also is provided with the gas valve (6) that is used to control combustion gas output in the described housing (1), and described gas valve (6) is connected in the below of burner box assembly (5).

7, gas firing wall according to claim 6 is characterized in that, a side of described burner box assembly (5) is connected with gas valve (6), and its opposite side is connected with heat-exchange tube (3), is provided with burner and igniter and external power supply in it.

8, according to claim 1 or 4 described gas firing walls, it is characterized in that, described smoke exhaust fan (4) is provided with exhanst gas outlet (41), and described exhanst gas outlet (41) is connected with answer pipe (7), and this exhanst gas outlet (41) is located to be provided with smoke exhaust pipe and passed through outside this smoke exhaust pipe communication chamber.

9, according to claim 1 or 4 described gas firing walls, it is characterized in that, the middle part, lower end of described circulating fan (2) offers the air intlet (21) that is used to introduce cold air, the upper end correspondence of described housing (1) offers the air outlet slit (22) that is used to send hot-air, the upper end of described circulating fan (2) is connected with answer pipe (7), and described air intlet (21) is connected with air outlet slit (22) by described answer pipe (7), heat-exchange tube (3).

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