CN205655481U - A gas-fired heating water heater with high energy efficiency ratio - Google Patents

Abstract

The utility model discloses a gas heating water heater of efficiency relative altitude, including combustion chamber and waste heat recovery device, install the heat exchanger in the combustion chamber, the combustor is installed to the below of heat exchanger, the exhaust fan is installed to the top, waste heat recovery device is provided with the waste gas import, exhaust outlet, water inlet and delivery port, waste heat recovery device's delivery port and the end intercommunication of intaking of heat exchanger, waste heat recovery device's waste gas import and exhaust fan's air-out end intercommunication, waste heat recovery device can absorb the heat in the gas heating water heater waste gas, advance into the heating in the heat exchanger after preheating cold water, can effectively improve the utilization ratio of gas, improve the efficiency ratio of gas heating water heater, reduce the temperature of waste gas, energy conservation and environmental protection.

Description

A gas-fired heating water heater with high energy efficiency ratio

technical field

The utility model relates to a water heating device, in particular to a gas heating water heater with the function of secondary utilization of waste heat.

Background technique

In the prior art, the waste gas generated by the gas-fired heating water heater after passing through the heat exchanger is directly discharged. After the heat exchange by the heat exchanger, the waste gas still contains a large amount of heat, which is not fully utilized, resulting in gas heating. The energy efficiency ratio of the water heater is not high, resulting in a waste of gas resources.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides an energy-saving and environment-friendly gas heating water heater with high energy efficiency ratio.

The technical scheme that the utility model solves its technical problem adopts is:

A gas-fired heating water heater with high energy efficiency ratio, including a combustion chamber and a waste heat recovery device, a heat exchanger is installed in the combustion chamber, a burner is installed below the heat exchanger, and an exhaust fan is installed above the heat exchanger. The recovery device is provided with a waste gas inlet, a waste gas outlet, a water inlet and a water outlet. The water outlet of the waste heat recovery device is connected to the water inlet of the heat exchanger, and the waste gas inlet of the waste heat recovery device is connected to the outlet of the exhaust fan. The air end is connected.

The waste heat recovery device includes a heat exchange chamber, and a water exchange tank is arranged on the outside of the heat exchange chamber; the upper end of the heat exchange chamber communicates with the exhaust gas inlet, and the lower end communicates with the exhaust gas outlet; the lower end of the heat exchange tank communicates with the inlet The water port is connected, and the upper end is connected with the water outlet; the lower end of the heat exchange chamber is provided with a condensed water outlet.

The heat exchange chamber is constituted by a part between the front shell and the rear shell, and heat exchange fins are arranged on opposite surfaces of the front shell and the rear shell.

A front case and a rear case are installed on the outer sides of the front case and the rear case respectively, and the heat exchange tank is composed of the front case, the rear case and the closed space between the front case and the rear case.

The outer sidewalls of the front shell and the rear shell are provided with several horizontally arranged ribs, so that several horizontally arranged water flow channels are formed inside the heat exchange tank.

A back plate is installed on the outside of the rear case, and the space between the rear case and the back plate forms an exhaust gas recirculation cavity, the lower end of the exhaust gas return cavity communicates with the lower end of the heat exchange chamber, and the upper end communicates with the The exhaust gas outlet is connected.

The beneficial effects of the utility model are: the gas heating water heater of the utility model includes a waste heat recovery device, the water outlet of the waste heat recovery device is connected with the water inlet end of the heat exchanger, and the waste gas inlet of the waste heat recovery device is connected with the air outlet end of the exhaust fan. Connected, the waste heat recovery device can absorb the heat in the exhaust gas of the gas heating water heater, preheat the cold water and then enter the heat exchanger for heating, which can effectively improve the utilization rate of gas, improve the energy efficiency ratio of the gas heating water heater, and reduce the waste gas temperature, energy saving and environmental protection.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a structural schematic diagram of a waste heat recovery device;

Fig. 3 is a sectional view of the waste heat recovery device;

Fig. 4 is an exploded view of the waste heat recovery device.

detailed description

Referring to Figures 1 to 4, a gas-fired heating water heater with high energy efficiency ratio includes a combustion chamber 21 and a waste heat recovery device 19, a heat exchanger 22 is installed in the combustion chamber 21, and a heat exchanger 22 is installed under the heat exchanger 22 A burner 20 is installed, and an exhaust fan 23 with a motor is installed on the top. The waste heat recovery device 19 is provided with a waste gas inlet 3, a waste gas outlet 4, a water inlet 5, and a water outlet 6. The water outlet of the waste heat recovery device 19 passes through the pipeline. 26 communicates with the water inlet end of the heat exchanger 22, the exhaust gas inlet 3 of the waste heat recovery device 19 communicates with the air outlet end of the exhaust fan 23 through a pipe 25, and the exhaust gas outlet 4 is connected to the outdoor through an exhaust pipe 24. The water inlet is used to connect to tap water.

The waste heat recovery device 19 includes a heat exchange chamber 1, and a water exchange tank 2 is arranged outside the heat exchange chamber 1; the upper end of the heat exchange chamber 1 communicates with the exhaust gas inlet 3, and the lower end communicates with the exhaust gas outlet 4; The lower end of the heat exchange tank 2 communicates with the water inlet, and the upper end communicates with the water outlet; the lower end of the heat exchange chamber 1 is provided with a condensed water outlet 7 . The waste gas of the gas-fired hot water enters the top of the heat exchange chamber 1 from the waste gas inlet 3, and is discharged from the lower end of the heat exchange chamber 1 through the waste gas outlet 4. The cold water enters the lower end of the heat exchange tank 2 from the water inlet, and passes through the upper end of the heat exchange tank 2. The water outlet is discharged, and the water vapor in the exhaust gas is condensed and discharged from the condensed water outlet 7.

The heat exchange chamber 1 is composed of a part between the front shell 8 and the rear shell 9, and heat exchange fins 10 are arranged on the opposite surfaces of the front shell 8 and the rear shell 9, and the heat exchange fins 10 It can increase the heat exchange area and improve the heat absorption rate.

The outer sides of the front shell 8 and the rear shell 9 are respectively equipped with a front shell 11 and a rear shell 12, and the heat exchange tank 2 is composed of the front shell 8, the rear shell 9 and the front shell 11, the The airtight space between the shells 12 is formed, and the structure is simple and compact. The outer walls of the front shell 8 and the rear shell 9 are provided with a number of horizontally arranged ribs 13, so that the inside of the heat exchange tank 2 forms a number of horizontally arranged water flow channels 14, and the ribs 13 increase the heat exchange area. , slowing down the water flow velocity, which is conducive to sufficient heat exchange.

A back plate 15 is installed on the outside of the rear case 12, and the space between the rear case 12 and the back plate 15 forms an exhaust gas recirculation chamber 16, and the lower end of the exhaust gas recirculation chamber 16 is connected to the heat exchange chamber 1. The lower end communicates with the exhaust gas outlet 4, the upper end of the heat exchange chamber 1 and the heat exchange water tank 2 is provided with an upper cover 17, the lower end of the heat exchange chamber 1 is provided with a water collector 18, and the exhaust gas outlet 4, The exhaust gas inlet 3 and the water outlet are arranged on the upper cover 17, and the condensed water outlet 7 is arranged on the water collector 18, which has a simple and compact structure.

The waste heat recovery device of the utility model can absorb the heat in the exhaust gas of the gas-fired heating water heater, preheat the cold water and then enter the heat exchanger for heating, which can effectively improve the utilization rate of the gas and improve the energy efficiency ratio of the gas-fired heating water heater. Reduce the temperature of exhaust gas, energy saving and environmental protection.

Claims (6)

1. A gas-fired heating water heater with high energy efficiency ratio, comprising a combustion chamber (21), a heat exchanger (22) is installed in the combustion chamber (21), and a The burner (20) is equipped with an exhaust fan (23) above, which is characterized in that it also includes a waste heat recovery device (19), and the waste heat recovery device (19) is provided with a waste gas inlet (3), a waste gas outlet (4), an inlet The water outlet (5) and the water outlet (6), the water outlet of the waste heat recovery device (19) communicates with the water inlet of the heat exchanger (22), the waste gas inlet (3) of the waste heat recovery device (19) ) communicates with the air outlet end of the exhaust fan (23). 2. The gas heating water heater with high energy efficiency ratio according to claim 1, characterized in that the waste heat recovery device (19) includes a heat exchange chamber (1), and the outside of the heat exchange chamber (1) is provided with The heat exchange tank (2); the upper end of the heat exchange chamber (1) communicates with the exhaust gas inlet (3), and the lower end communicates with the exhaust gas outlet (4); the lower end of the heat exchange tank (2) communicates with the exhaust gas inlet (3) The water inlet is connected, and the upper end is connected with the water outlet; the lower end of the heat exchange chamber (1) is provided with a condensed water outlet (7). 3. The gas-fired heating water heater with high energy efficiency ratio according to claim 2, characterized in that the heat exchange chamber (1) is composed of a part between the front shell (8) and the rear shell (9), Heat exchanging fins (10) are arranged on opposite surfaces of the front shell (8) and the rear shell (9). 4. The gas-fired heating water heater with high energy efficiency ratio according to claim 3, characterized in that the front casing (8) and the rear casing (9) are respectively equipped with a front casing (11) and a rear casing The tank shell (12), the heat exchange tank (2) is composed of the front shell (8), the rear shell (9) and the closed space between the front shell (11) and the rear shell (12). 5. The gas-fired heating water heater with high energy efficiency ratio according to claim 4, characterized in that the outer side walls of the front shell (8) and the rear shell (9) are provided with several horizontally arranged ribs (13 ), so that a number of horizontally arranged water flow channels (14) are formed inside the heat exchange tank (2). 6. The gas heating water heater with high energy efficiency ratio according to claim 4, characterized in that a back plate (15) is installed on the outer side of the rear box shell (12), and the back box shell (12) and the back The space between the plates (15) forms a waste gas return cavity (16), the lower end of the waste gas return cavity (16) communicates with the lower end of the heat exchange chamber (1), and the upper end communicates with the waste gas outlet (4).