CN216667983U - A high-efficiency heating boiler - Google Patents

Abstract

The utility model relates to a high-efficiency heating boiler, comprising a burner, a gas-gas heat exchanger and a gas-liquid heat exchanger; Mixing cavity, furnace hearth, and furnace bottom; the gas-air heat exchanger is provided with an exhaust air intake cavity, an exhaust air intake port, an air-air heat exchange cavity, a high-efficiency air-to-air heat exchange unit, an exhaust air outlet, and an exhaust air outlet. Cavity, waste gas passage, waste gas outlet, gas-to-air heat exchange inlet, gas-to-air heat exchange inlet cavity, gas-to-air heat exchange outlet, gas-to-air heat exchange outlet cavity, and exhaust overflow; the gas-liquid heat exchanger Equipped with a liquid inlet, a gas-liquid heat exchange chamber, and a liquid outlet; the boiler can effectively and accurately control the ratio of fuel and air; the flame ignites quickly during the heating process, and the fuel can be completely burned. The high-efficiency heating boiler provided by the utility model uses a high-efficiency heat exchange unit, which can heat two mediums of gas and liquid at the same time, and has the characteristics of high thermal efficiency, fast temperature rise, less exhaust pollution and the like.

Description

A high-efficiency heating boiler

technical field

The utility model belongs to the technical field of heating boilers, in particular to a high-efficiency heating boiler.

Background technique

A heating boiler is a device that mixes air and fuel in an appropriate proportion for combustion, and heats gas or gas through the generated heat energy. There are many types of heating boilers, but the combustion method of the existing boiler products is to directly infiltrate the fuel on the fine metal grid, and the initial ignition is ignited by the high thermal resistance wire to ignite the surface fuel. After local combustion, the flame spreads around with the incoming fresh air. Circle the metal mesh to form a hearth flame. This kind of combustion method ignites slowly, and the mixing is uneven, a large amount of black smoke is formed in the early stage of combustion, and the fuel economy is poor. In addition, the existing heating boilers often only heat one medium, and the combustion chamber and the heat exchange unit have simple structures, low heat exchange efficiency, and slow heating of the medium.

Utility model content

The purpose of the utility model is to provide a high-efficiency heating boiler, which can effectively and accurately control the ratio of fuel and air; during the heating process, the flame is ignited quickly, and the fuel can be completely burned. The high-efficiency heating boiler provided by the utility model uses a high-efficiency heat exchange unit, which can heat two mediums of gas and liquid at the same time, and has the characteristics of high thermal efficiency, fast temperature rise, less exhaust pollution and the like.

The high-efficiency heating boiler provided by the utility model comprises a burner, a gas-gas heat exchanger and a gas-liquid heat exchanger;

The burner is provided with a nozzle, a glow plug, a burner air inlet, a vent hole, a spiral channel, a premixing cavity, a furnace chamber, and a furnace bottom; the nozzle is connected to an external oil pump for spraying oil mist; the electric heating The plug is used to ignite the fuel mist; the air inlet of the burner is connected to an external combustion fan for gas injection; the premixing chamber is used for the mixing of the oil mist and the gas; the furnace chamber is used for the combustion of the fuel;

Wherein, the air inlet of the burner is connected to one end of the ventilation hole, and the other end is connected to the spiral channel; the spiral channel is connected to the premixing chamber through the channel; the premixing chamber is connected to the furnace chamber; the furnace chamber is connected to the furnace bottom , the furnace bottom is communicated with the gas-gas heat exchanger;

Wherein, the burner is provided with a vent hole and a spiral channel; in practical application, the fresh air can be quickly dispersed through the vent hole and the spiral channel and then enter the premixing chamber, but the gas and the oil mist are fully mixed.

The gas-to-air heat exchanger is provided with an exhaust air intake cavity, an exhaust air intake port, an air-to-air heat exchange cavity, a high-efficiency air-to-air heat exchange unit, an exhaust air outlet, an exhaust air outlet cavity, an exhaust gas channel, and an exhaust gas outlet. Air port, air-to-air heat exchange air inlet, air-to-air heat exchange air inlet cavity, air-to-air heat exchange air outlet, air-to-air heat exchange air outlet cavity, exhaust overflow port;

Wherein, the exhaust air inlet cavity is provided with an exhaust air inlet on the inner wall of the air-air heat exchanger, which is connected with the air-air heat exchange cavity; a high-efficiency air-to-air heat exchange unit is arranged in the air-air heat exchange cavity; The exhaust gas outlet cavity is provided with an exhaust gas outlet, and the exhaust gas outlet cavity is connected with the inner channel of the high-efficiency gas-air heat exchange unit; the other end of the exhaust gas outlet cavity is connected with an exhaust gas channel, and the exhaust gas channel is provided with an exhaust gas outlet;

The gas-liquid heat exchanger is provided with a liquid inlet, a gas-liquid heat exchange chamber, and a liquid outlet;

Wherein, the liquid inlet is connected with the external liquid circulation pump, and the liquid outlet is connected with the external liquid circulation heat absorption device through pipelines; the liquid inlet and the liquid outlet are respectively communicated with the gas-liquid heat exchange chamber through channels ; The gas-liquid heat exchange cavity covers the second half of the furnace bottom.

Wherein, the gas-liquid heat exchange chamber is covered in the second half of the furnace, close to the bottom of the furnace; the covering position does not exceed 2/3 of the furnace height; and, in the covering part, the two have a certain amount Clearance for exhaust discharge.

Wherein, the ventilation holes are preferably waist-shaped ventilation holes; the ventilation volume can be further increased.

The utility model further proposes that the burner is provided with a flame stabilization disk, and the flame stabilization disk is located behind the glow plug and fixed in the furnace chamber.

Wherein, the burner is provided with a nozzle, a glow plug and a flame stabilization plate, which can further ensure sufficient and stable combustion of the fuel.

The nozzle is connected to the external oil pipe and the oil pump; the glow plug is connected to the external wiring harness and the controller; the air inlet of the burner is connected to the external combustion fan; The fuel is sucked in and high pressure is generated, and the oil mist is sprayed through the fine holes at the front end of the nozzle 4. The oil mist contacts the high-temperature glow plug and starts to catch fire; the combustion fan connected to the air inlet of the burner starts to work, and air is introduced; Under the dispersion of the channel, an oil-gas mixture is formed with the oil mist in the premixing chamber; and then the furnace chamber with the flame stabilization plate is set up for stable and efficient combustion.

The high-efficiency heating boiler provided by the utility model adopts the way of igniting the high-pressure injection fuel oil, the vent hole and the air intake of the spiral channel to support the combustion by the glow plug. The furnace bottom with fins transfers heat quickly to the gas-liquid heat exchange cavity with spiral fins and has high efficiency.

The utility model further proposes that the inner cavity of the furnace bottom is provided with fins, and the fins and the outer wall of the furnace hearth form a high-temperature exhaust channel;

Preferably, the fins are circumferentially cast or welded on the inner wall of the furnace bottom.

The utility model further proposes that the inner wall of the gas-liquid heat exchange cavity is provided with spiral fins. The spiral fins form a spiral gas-liquid heat exchange cavity with the inner wall of the gas-liquid heat exchanger and the outer wall of the furnace bottom. The liquid enters the liquid inlet channel from the liquid inlet, and then enters the liquid outlet after spiralling around the gas-liquid heat exchange cavity for many times. channel, and then flow out from the liquid outlet.

The utility model further proposes that the high-efficiency gas-air heat exchange unit is a folded cylindrical structure folded into an isosceles triangle. The high-efficiency gas-gas heat exchange unit is folded to form the heat exchange area of the inner channel and the outer channel, which is an isosceles triangle, and the two side walls of the isosceles triangle are heat exchange boundaries; the inner channel is communicated with high-temperature exhaust gas, and the outer channel is connected to The heat exchange gas is communicated.

Preferably, the high-efficiency gas-gas heat exchange unit is provided with an inner channel and an outer channel, the inner channel communicates with the high-temperature exhaust gas, and the outer channel communicates with the heat exchange gas.

Wherein, the high-efficiency gas-gas heat exchange unit is made by folding high-temperature and corrosion-resistant plates.

In the gas-air heat exchanger of the utility model, a high-efficiency gas-air heat exchange unit is adopted, which is made of high temperature-resistant and corrosion-resistant plates, and more fins can be folded to greatly increase the heat exchange area. The heat exchange area folded to form the inner channel and the outer channel is an isosceles triangle, and the two side walls of the isosceles triangle are heat exchange boundaries.

The utility model further proposes that the gas-gas heat exchanger is also provided with a support plate for fixing the high-efficiency gas-gas heat exchange unit.

Wherein, the structure of the support plate is completely consistent with the isosceles triangle folded shape of the high-efficiency gas-gas heat exchange unit.

The utility model further proposes that a partition plate is arranged between the exhaust gas inlet cavity and the exhaust gas outlet cavity. The high-temperature exhaust gas must first enter the exhaust gas inlet cavity, and then enter the exhaust gas outlet cavity through the inner channel of the high-efficiency gas-air heat exchange unit.

The utility model further proposes that the air-to-air heat exchange air inlet and the exhaust air inlet are located at both ends of the air-to-air heat exchanger.

In the gas-air heat exchanger, a partition plate is arranged between the exhaust gas inlet cavity and the exhaust gas outlet cavity, and the high-temperature exhaust gas must first enter the exhaust gas inlet cavity and enter through the inner channel of the high-efficiency gas-gas heat exchange unit. Exhaust out of the air cavity, increase the stroke of high temperature exhaust. Moreover, the air-to-air heat exchange inlet and the exhaust air inlet are located at both ends of the air-to-air heat exchanger.

The gas-liquid heat exchanger of the utility model is provided with spiral fins, and the spiral fins form a spiral gas-liquid heat exchange cavity with the inner wall of the gas-liquid heat exchanger and the outer wall of the furnace bottom, and the liquid enters the liquid inlet through the liquid inlet. The gas-liquid heat exchange chamber enters the liquid outlet channel after multiple spiral detours, and then flows out from the liquid outlet. The liquid flow direction is opposite to the high temperature exhaust gas flow direction, and the heat exchange thread is long and the efficiency is high.

Description of drawings

Fig. 1 is the structural representation of the high-efficiency heating boiler provided by the utility model;

Fig. 2 is the structural schematic diagram of the sectional plane 1 of the high-efficiency heating boiler provided by the utility model;

3 is a schematic structural diagram of the cross-sectional surface 2 of the high-efficiency heating boiler provided by the utility model;

4 is a schematic structural diagram of a ventilation hole provided by the utility model;

Fig. 5 is the structural representation of the spiral channel provided by the present utility model;

Fig. 6 is the structural representation of the flame stabilization disk provided by the present utility model;

Fig. 7 is the structural representation of the furnace bottom provided by the utility model;

8 is a schematic structural diagram of a high-efficiency gas-air heat exchange unit provided by the present invention;

9 is a schematic structural diagram of a gas-liquid heat exchange chamber provided by the present invention;

Figure 10 is a structural diagram of a support plate of the present invention;

In the figure: 1. Burner; 2. Gas-gas heat exchanger; 3. Gas-liquid heat exchanger; 4. Nozzle; 5. Glow plug; 6. Burner air inlet; 7. Ventilation hole; 8. Spiral channel ;9. Intake passage of burner; 10. Premixing chamber; 11. Flame stabilization plate; 12. Furnace; 13. Bottom of furnace; 14. Fins; 15. High temperature exhaust passage; , partition; 18, exhaust air inlet cavity; 19, gas-air heat exchanger inner wall; 20, exhaust air inlet; 21, gas-air heat exchange cavity; 22, high-efficiency gas-air heat exchange unit; 23, inner channel ;24, Outer channel; 25, Exhaust air outlet; 26, Exhaust air outlet; 27, Exhaust passage; 28, Exhaust air outlet; 29, Support plate; 30, End plate of air-to-air heat exchanger; 31, Exhaust Overflow channel; 32. Exhaust overflow port; 33. Air-to-air heat exchange air inlet; 34. Air-to-air heat exchange air inlet cavity; 35. Air-to-air heat exchange air outlet; 36. Air-to-air heat exchange air outlet; 37, liquid inlet; 38, liquid inlet channel; 39, liquid inlet hole; 40, spiral fin; 41, gas-liquid heat exchange chamber; 42, liquid outlet hole; 43, liquid outlet channel; 44, liquid outlet; 45. Outer wall of air-to-air heat exchanger.

Detailed ways

The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "horizontal", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, only for the convenience of describing the present utility model and simplifying the description, rather than indicating or It is implied that the indicated device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation on the protection scope of the present invention.

Example

A high-efficiency heating boiler is mainly composed of a burner 1, a gas-gas heat exchanger 2 and a gas-liquid heat exchanger 3, as shown in Figures 1-3;

The burner 1 is provided with a nozzle 4, a glow plug 5, a burner air inlet 6, a vent hole 7, a spiral channel 8, a premixing cavity 10, a flame stabilization plate 11, a furnace chamber 12, and a furnace bottom 13;

Wherein, the vent hole is a waist-shaped vent hole;

The air-to-air heat exchanger 2 is provided with an exhaust air intake chamber 18, an exhaust air intake port 20, an air-to-air heat exchange chamber 21, a high-efficiency air-to-air heat exchange unit 22, an exhaust air outlet 25, an exhaust air outlet chamber 26, and waste gas. Channel 27, exhaust gas outlet 28, air-to-air heat exchange inlet 33, air-to-air heat exchange inlet cavity 34, air-to-air heat exchange air outlet 36, air-to-air heat exchange air outlet cavity 35, exhaust overflow port 32, support plate 29.

The gas-liquid heat exchanger 3 is provided with a liquid inlet 37 , a liquid inlet channel 38 , a spiral fin 40 , a gas-liquid heat exchange cavity 41 , a liquid outlet channel 43 , and a liquid outlet 44 . The nozzle 4 is connected with an external oil pipe and an oil pump; the glow plug 5 is connected with an external wiring harness and a controller; the burner air inlet 6 is connected with an external combustion fan; one end of the vent hole 7 is connected with the burner air inlet 6 is connected, and one end is connected with the helical channel 8; The associated premixing chamber 10 is connected with the furnace chamber 12; the flame stabilization plate 11 is located behind the glow plug 5 and is fixed in the furnace chamber 12; the furnace chamber 12 is connected with the furnace bottom 13, and the furnace bottom 13 is connected with the exhaust gas inlet chamber 18 The exhaust air inlet chamber 18 is provided with an exhaust air inlet 20 on the inner wall 19 of the air-air heat exchanger, which is connected with the air-air heat exchange chamber 21; the air-air heat exchange chamber 21 is provided with a high-efficiency gas Air heat exchange unit 22; the high-efficiency air-to-air heat exchange unit 22 is provided with an inner channel 23 and an outer channel 24, the inner channel 23 communicates with the high-temperature exhaust gas, and the outer channel 24 communicates with the heat exchange gas; the exhaust gas outlet cavity 26 An exhaust gas outlet 25 is provided, and the exhaust gas outlet cavity 26 is connected with the inner channel 23 of the high-efficiency gas-air heat exchange unit 22; the other end of the exhaust gas outlet cavity 26 is connected with the exhaust gas channel 27, and the exhaust gas channel 27 is provided with an exhaust gas outlet 28 One end of the air-to-air heat exchange air inlet 33 is connected to the external heat exchange fan, and one end is connected to the air-to-air heat exchange air inlet cavity 34; The pipeline is connected, and one end is connected to the air-gas heat exchange outlet cavity 35; the exhaust overflow ports 32 are located at both ends of the air-air heat exchanger 2; the support plate 29 (as shown in Figure 10) is used to fix the high-efficiency gas The gas heat exchange unit 22; the liquid inlet 37 is connected with an external pipeline and a circulating pump; one end of the liquid inlet channel 38 is connected with the liquid inlet 37, and the other end is communicated with the gas-liquid heat exchange chamber 41; the gas-liquid The heat exchange cavity 41 is provided with a spiral fin 40 (as shown in FIG. 9 ); one end of the liquid outlet channel 43 is connected with the gas-liquid heat exchange cavity 41, and the other end is connected with the liquid outlet 44; the liquid outlet 44 is connected with the external liquid circulation heat absorption device through a pipeline;

In the present utility model: the burner 1 is provided with a waist-shaped ventilation hole (as shown in Figure 4), and a spiral channel 8 (as shown in Figure 5), after the fresh air is dispersed through the waist-shaped ventilation hole and the spiral channel 8 into the premix chamber 10 .

In the utility model: the inner cavity of the furnace bottom 13 is provided with fins 14, and the fins 14 and the outer wall of the furnace hearth 12 form a high-temperature exhaust channel 15; the fins 14 are circumferentially cast or welded on the furnace bottom 13. on the inner wall.

In the present invention, the high-efficiency gas-air heat exchange unit 22 is made of high-temperature-resistant and corrosion-resistant plates by folding.

In the present invention: the high-efficiency gas-air heat exchange unit 22, the heat exchange area folded to form the inner channel 23 and the outer channel 24 is an isosceles triangle, and the two side walls of the isosceles triangle are heat exchange boundaries; the inner channel 23 communicates with the high temperature exhaust gas, and the outer channel 24 communicates with the heat exchange gas, as shown in FIG. 8 .

In the present utility model: a partition 17 is arranged between the exhaust gas inlet cavity 18 and the exhaust gas outlet cavity 26, and the high temperature exhaust gas must first enter the exhaust gas inlet cavity 18, and then pass through the exhaust gas inlet port 20 and the The inner channel 23 of the high-efficiency gas-to-air heat exchange unit 22 enters the exhaust gas outlet cavity 26 through the exhaust gas outlet port 25 .

In the present invention, the air-to-air heat exchange inlet 33 and the exhaust air inlet 20 are located at both ends of the air-to-air heat exchanger 2 .

In the present utility model: the gas-liquid heat exchanger 3 is provided with a spiral fin 40; the spiral fin 40 forms a spiral gas-liquid heat exchange cavity 41 with the inner wall of the gas-liquid heat exchanger 3 and the outer wall of the furnace bottom 13 The liquid enters the liquid inlet channel 38 from the liquid inlet 37 , passes through the liquid inlet hole 39 through the gas-liquid heat exchange chamber 41 for several times, and then enters the liquid outlet channel 43 from the liquid outlet hole 42 , and then flows out from the liquid outlet 44 .

The working principle of the high-efficiency heating boiler provided by the utility model is as follows: when the high-efficiency heating boiler is working, under the control of an external controller, the system firstly starts to heat the glow plug 5, and the external oil pump sucks fuel oil from the oil pipe and generates high pressure, and passes through the nozzle 4. An oil mist is sprayed out from the pores at the front end, and the oil mist contacts the glow plug 5 at a high temperature and starts to ignite.

At the same time, the combustion fan connected to the burner air inlet 6 starts to send uniform air to the premixing chamber 10 through the kidney-shaped vent hole, the spiral passage 8 and the burner air inlet passage 9, and forms an oil-gas mixture with the oil mist. Under the action of the swirl channel 47 and the straight channel 48 of the flame plate 11 (shown in FIG. 6 ), stable combustion in the furnace 12 begins. The high-temperature exhaust gas generated by the combustion enters the furnace bottom 13 through the furnace chamber 12 and begins to exchange heat through the gas-liquid heat exchanger 3 .

The external circulating liquid enters from the liquid inlet 37 through the liquid inlet channel 38 through the liquid inlet hole 39 into the spiral gas-liquid heat exchange cavity 41 formed by the spiral fins 40 and the inner wall of the gas-liquid heat exchanger 3 and the outer wall of the furnace bottom 13 . The liquid in the gas-liquid heat exchange chamber 41 exchanges heat with the high-temperature gas in the high-temperature exhaust channel 15 formed by the fins 14 and the outer wall of the furnace 12 in the furnace bottom 13 (as shown in FIG. 7 ). The liquid after heat exchange enters the external liquid circulation heat absorption device from the liquid outlet hole 42 through the liquid outlet channel 43 through the liquid outlet port to complete the gas-liquid heat exchange. The spiral flow direction of the liquid is opposite to the high temperature exhaust gas flow direction, and the heat exchange thread is long, so the heat exchange efficiency is high.

The high-temperature exhaust gas after gas-liquid heat exchange enters the exhaust gas intake cavity 18 through the high-temperature exhaust hole 16 on the partition plate 17 . The partition plate 17 separates the exhaust gas inlet cavity 18 and the exhaust gas outlet cavity 26, and the exhaust gas must pass the exhaust gas in the exhaust gas inlet cavity 18 through the exhaust gas inlet 20 on the inner wall 19 of the gas-air heat exchanger, Enter the gas-air heat exchange chamber 21 to conduct gas-to-air heat exchange. The heat exchange gas enters the air-to-air heat exchange air inlet cavity 34 through the air-to-air heat exchange air inlet 33 via the external heat exchange fan. Air-to-air heat exchange The gas in the air inlet cavity 34 enters the outer channel 24 by the high-efficiency air-to-air heat exchange unit 22 and the outer wall 45 of the air-to-air heat exchanger, and the high-efficiency air-to-air heat exchange unit 22 (shown in FIG. 8 ) and the air-to-air heat exchange The high-temperature exhaust gas in the inner channel 23 formed by the inner wall 19 of the device conducts heat exchange. After heat exchange and heating in the outer channel 24, the gas enters the air-gas heat exchange outlet cavity 35 from the outer channel 24, and enters the external air circulation heat absorption device through the air-gas heat exchange outlet 36 to complete the heat exchange. The high-temperature exhaust gas in the inner passage 23 decreases in temperature after heat exchange, enters the exhaust gas outlet cavity 26 through the exhaust gas outlet 25 , and is discharged out of the machine through the exhaust gas outlet 28 through the exhaust gas passage 27 .

In order to further isolate the high temperature exhaust gas caused by brazing cracks between the two ends of the gas-air heat exchanger 2 and the two ends of the high-efficiency gas-gas heat exchange unit 22 that may be caused by high-intensity vibration damage of the boiler The end is designed with an exhaust overflow channel 31 and an exhaust overflow port 32, and the high-temperature exhaust gas overflowing due to cracking is discharged out of the machine through the overflow channel 31 and the exhaust overflow port 32. The high-temperature exhaust gas exchanges heat with the heat exchange gas through the high-efficiency gas-air heat exchange unit 22 formed by folding, and the heat exchange area is large. At both ends of the heat exchange gas and the high temperature exhaust gas flow in opposite directions, the heat exchange is fully carried out and the heat exchange efficiency is improved.

In summary, a high-efficiency heating boiler has the functions of gas-gas and gas-liquid heat exchange, and has the characteristics of large heat exchange area, long heat exchange stroke, high heat exchange efficiency and reasonable structure.

Although, the present utility model has been described in detail above with general description, specific embodiments and tests, but on the basis of the present utility model, some modifications or improvements can be made to it, which is very important to those skilled in the art. Obvious. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention belong to the scope of protection of the present invention.

Claims (11)

1. A high-efficiency heating boiler, characterized in that, comprising a burner (1), a gas-gas heat exchanger (2) and a gas-liquid heat exchanger (3); The burner (1) is provided with a nozzle (4), a glow plug (5), a burner air inlet (6), a ventilation hole (7), a spiral channel (8), a premixing cavity (10), a furnace chamber (12), the furnace bottom (13); the nozzle (4) is connected to an external oil pump for spraying oil mist; the glow plug (5) is used for igniting the oil mist; the burner air inlet (6) An external combustion fan is connected for gas injection; the premixing chamber (10) is used for mixing oil mist and gas; the furnace chamber (12) is used for fuel combustion; Wherein, the burner air inlet (6) is connected to one end of the ventilation hole (7), and the other end is connected to the spiral channel (8); the spiral channel (8) is connected to the premixing chamber (10) through the channel ; The premixing cavity (10) is connected to the furnace chamber (12); the furnace chamber (12) is connected to the furnace bottom (13), and the furnace bottom (13) is communicated with the gas-gas heat exchanger (2); The gas-to-air heat exchanger (2) is provided with an exhaust air intake cavity (18), an exhaust air intake port (20), an air-to-air heat exchange cavity (21), a high-efficiency air-to-air heat exchange unit (22), Exhaust air outlet (25), exhaust air outlet cavity (26), exhaust gas passage (27), exhaust gas outlet (28), air-to-air heat exchange air inlet (33), air-to-air heat exchange air intake cavity (34) , an air-to-air heat exchange air outlet (36), an air-to-air heat exchange air outlet cavity (35), and an exhaust overflow port (32); Wherein, the exhaust air inlet chamber (18) is provided with an exhaust air inlet (20) on the inner wall (19) of the air-air heat exchanger, which is connected with the air-air heat exchange chamber (21); A high-efficiency gas-air heat exchange unit (22) is arranged in the thermal cavity (21); the exhaust gas outlet cavity (26) is provided with an exhaust gas outlet (25), and the exhaust gas-outlet cavity (26) exchanges heat with the high-efficiency gas and gas The inner channel (23) of the unit (22) is connected; the other end of the exhaust gas outlet cavity (26) is connected with the exhaust gas channel (27), and the exhaust gas channel (27) is provided with an exhaust gas outlet (28); The gas-liquid heat exchanger (3) is provided with a liquid inlet (37), a gas-liquid heat exchange chamber (41), and a liquid outlet (44); Wherein, the liquid inlet (37) is connected with the external liquid circulation pump, and the liquid outlet (44) is connected with the external liquid circulation heat absorption device through pipelines; the liquid inlet (37) and the liquid outlet ( 44) respectively communicate with the gas-liquid heat exchange chamber (41) through a channel; the gas-liquid heat exchange chamber (41) covers the second half of the furnace bottom (13). 2. The high-efficiency heating boiler according to claim 1, wherein the burner (1) is provided with a flame stabilization disk (11), and the flame stabilization disk (11) is located behind the glow plug (5) , which is fixed in the furnace (12). 3. The high-efficiency heating boiler according to claim 1 or 2, wherein the inner cavity of the furnace bottom (13) is provided with fins (14), and the fins (14) and the outer wall of the furnace (12) form a high temperature Exhaust passage (15). 4. The high-efficiency heating boiler according to claim 3, wherein the fins (14) are circumferentially cast or welded on the inner wall of the furnace bottom (13). 5. The high-efficiency heating boiler according to claim 1 or 2, wherein the inner wall of the gas-liquid heat exchange chamber (41) is provided with helical fins (40). 6. The high-efficiency heating boiler according to claim 1 or 2, wherein the high-efficiency gas-gas heat exchange unit (22) is a folded cylindrical structure folded into an isosceles triangle. 7. The high-efficiency heating boiler according to claim 6, wherein the high-efficiency gas-gas heat exchange unit (22) is provided with an inner channel (23) and an outer channel (24), and the inner channel (23) is connected to the high-temperature exhaust The gas is in communication, and the outer channel (24) is in communication with the heat exchange gas. 8. The high-efficiency heating boiler according to claim 1, 6 or 7, characterized in that, the high-efficiency gas-gas heat exchange unit (22) is made by folding a high-temperature-resistant and corrosion-resistant plate. 9. The high-efficiency heating boiler according to claim 1 or 2, wherein a support plate (29) is further provided on the gas-gas heat exchanger (2) for fixing the high-efficiency gas-gas heat exchange unit (22). ). 10. The high-efficiency heating boiler according to claim 1 or 2, wherein a partition plate (17) is provided between the exhaust gas inlet cavity (18) and the exhaust gas outlet cavity (26). 11. The high-efficiency heating boiler according to claim 1 or 2, wherein the air-to-air heat exchange inlet (33) and the exhaust air inlet (20) are located at both ends of the air-to-air heat exchanger (2) .

Images