Air heater

Abstract

The utility model provides an air heater which comprises an outer shell, an inner shell, a combustion chamber and a heat dissipation assembly, a hearth is arranged in the inner shell, the combustion chamber is arranged in the hearth, the outlet side of the hearth is connected with a chimney through the heat dissipation assembly, an outer shell air inlet, an outer shell air outlet and a hot air outlet are formed in the outer shell, and the outer shell air inlet is communicated with the outer shell air outlet. The inner shell is arranged in the outer shell, a cold air preheating gap is formed between the outer shell and the inner shell, and a heat exchange space is formed between the inner wall of the inner shell and the outer wall of the heat dissipation assembly. The air inlet temperature of the air blower can be greatly increased by preheating cold air, the heat exchange effect is improved, and the temperature of provided hot air is higher under the comparison of the same environment temperature.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange, in particular to a hot air blower. Background Art

[0002] In the prior art, hot air blowers are often used to heat certain places that need to be heated, such as heating farms. Conventional hot air blowers in the prior art include a combustion chamber and a blower, etc. The blower is used to heat the air to be heated with the hot smoke generated by the combustion chamber, thereby heating it and converting it into hot air, which is then provided to the place that needs to be heated. However, the blower air inlet of the conventional hot air blower directly absorbs cold air from the outside and then heats it, thus affecting the heating effect. Utility Model Content

[0003] The utility model provides a hot air blower to solve at least one of the above technical problems.

[0004] To solve the above problems, as one aspect of the utility model, a hot air blower is provided, comprising: an outer shell, an inner shell, a combustion chamber, a heat dissipation component and a blower, the inner shell being provided with a furnace hall, the combustion chamber being provided in the furnace hall, the outlet side of the furnace hall being connected to the chimney through the heat dissipation component, the outer shell being provided with an outer shell air inlet, an outer shell air outlet and a hot air outlet, the inner shell being provided in the outer shell and a cold air preheating gap being formed between the outer shell and the inner shell, a heat exchange space being formed between the inner wall of the inner shell and the outer wall of the heat dissipation component, the outer shell air inlet being connected to the air inlet of the blower through the cold air preheating gap, the air outlet of the blower being connected to the heat exchange space, and the heat exchange space being connected to the hot air outlet.

[0005] Preferably, a heat sink is provided in the cold air preheating gap, and the heat sink is provided on the outer wall of the inner shell.

[0006] Preferably, the cold air preheating gap is arranged around the entire outer surface of the inner shell.

[0007] Preferably, the heat dissipation assembly comprises a plurality of fin heat dissipation tubes and a smoke cabinet which are sequentially arranged in series.

[0008] Preferably, the hot air blower also includes a feeding auger pipe and a hopper, the lower end of the hopper is connected to the feed port of the feeding auger pipe, the discharge port of the feeding auger pipe extends into the combustion chamber, and an anti-backfire blower is provided on the feeding auger pipe.

[0009] Preferably, the cold air preheating gap is connected to the air inlet of the blower through a connecting pipe, and the chimney runs through the connecting pipe.

[0010] Preferably, the hot air blower further comprises an induced draft fan, and the heat dissipation assembly is connected to the chimney via the induced draft fan.

[0011] Due to the adoption of the above technical solution, the utility model can greatly increase the air inlet temperature of the blower by preheating the cold air, thereby improving the heat exchange effect and providing a higher hot air temperature when compared with the same ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is schematically shown in three dimensions. Figure 1 ;

[0013] Figure 2 The utility model is schematically shown in three dimensions. Figure 2 ;

[0014] Figure 3 A cross-sectional view of the present invention is schematically shown.

[0015] The reference numerals in the figure are: 1. outer shell; 2. inner shell; 3. combustion chamber; 4. blower; 5. chimney; 6. outer shell air inlet; 7. hot air outlet; 8. cold air preheating gap; 9. heat exchange space; 10. heat sink; 11. fin heat dissipation pipe; 12. smoke cabinet; 13. feeding auger; 14. hopper; 15. anti-backfire blower; 16. combustion chamber blower; 17. connecting pipe; 18. furnace hall; 19. outer shell air outlet; 21. induced draft fan; 22. ash taking port. DETAILED DESCRIPTION

[0016] The following is a detailed description of the embodiments of the present invention, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0017] In the prior art, the outer shell of the conventional hot air blower is insulated with high temperature resistant asbestos, and then the outer shell is sealed outside the asbestos. When the hot air blower is running and the furnace is burning, the inner shell will also be heated, and the heat will also be conducted and dissipated. This heat is not fully utilized, resulting in waste, so that when the cold air from the outside enters the hot air blower, the heating effect is not ideal.

[0018] As one aspect of the utility model, a hot air blower is provided, comprising: an outer shell 1, an inner shell 2, a combustion chamber 3, a heat dissipation component and a blower 4, the inner shell 2 is provided with a furnace hall 18, the combustion chamber 3 is provided in the furnace hall 18, the outlet side of the furnace hall 18 is connected to a chimney 5 provided on the outer shell 1 through the heat dissipation component, the outer shell 1 is provided with an outer shell air inlet 6, an outer shell air outlet 19 and a hot air outlet 7, the inner shell 2 is provided in the outer shell 1 and a cold air preheating gap 8 is formed between the outer shell 1 and the inner shell 2, a heat exchange space 9 is formed between the inner wall of the inner shell 2 and the outer wall of the heat dissipation component, the outer shell air inlet 6 is connected to the air inlet of the blower 4 through the cold air preheating gap 8, the air outlet of the blower 4 is communicated with the heat exchange space 9, the heat exchange space 9 is communicated with the hot air outlet 7, and the air outlet of the combustion chamber blower 16 is communicated with the combustion chamber 3.

[0019] Preferably, the heat dissipation assembly includes a plurality of fin heat dissipation tubes 11, a smoke cabinet 12 and a furnace 18 which are sequentially arranged in series. In the prior art, the smoke pipe of a conventional hot air blower uses a smooth iron steel pipe, which has a small total surface area for heat exchange and a low utilization rate. The smoke pipe of the utility model uses a fin heat dissipation tube 11 instead, and fins are installed on the surface layer of the smoke pipe, thereby increasing the total surface area of ​​the heat exchange tube and improving the heat transfer efficiency.

[0020] Preferably, a heat sink 10 is provided in the cold air preheating gap 8, and the heat sink 10 is provided on the outer wall of the inner shell 2. The heat sink 10 can better preheat the cold air sucked by the blower 4 and more fully utilize the heat dissipated by the outer wall of the inner shell.

[0021] Preferably, the cold air preheating gap 8 is arranged around the entire outer surface of the inner shell 2. In this way, cold air preheating gaps 8 are formed between the inner shell 2 and the outer shell 1 in six directions, namely, up, down, left, right, front, and back, to increase the preheating area and improve the preheating effect.

[0022] Preferably, the hot air blower further comprises a feeding auger pipe 13 and a hopper 14, the lower end of the hopper 14 is butted against the feeding port of the feeding auger pipe 13, the discharge port of the feeding auger pipe 13 extends into the combustion chamber 3, and an anti-flashback blower 15 is provided on the feeding auger pipe 13. The burning material is placed in the hopper 14 and fed into the combustion chamber 3 through the feeding auger pipe 13 below it for combustion. Among them, the anti-flashback blower 15 blows a certain amount of air into the feeding auger pipe 13 to play a role in anti-flashback.

[0023] Preferably, the cold air preheating gap 8 is connected to the air inlet of the blower 4 through a connecting pipe 17, and the chimney 5 runs through the connecting pipe 17. In this way, the smoke exhausted from the chimney 5 can dissipate heat to the connecting pipe 17 when passing through the connecting pipe 17, thereby further heating the air flowing from the cold air preheating gap 8 to the blower 4, so that the cold air can be preheated together with the cold air preheating gap 8.

[0024] In the prior art, the combustion chamber of the machine is integrated with the furnace, and the ash produced by the combustion is sucked through the furnace side outlet by the induced draft fan and stored in the side smoke cabinet. Therefore, the machine in the current technology has high requirements for fuel. If the fuel does not meet the requirements, the ash produced by the combustion contains many impurities (such as stone powder) or coke, and the induced draft fan is not enough to suck the ash produced by the combustion to the side smoke cabinet, thereby blocking the combustion chamber, reducing the firepower and then the machine shuts down.

[0025] For this purpose, preferably, the hot air blower further comprises an induced draft fan 21, and the heat dissipation assembly is connected to the chimney 5 via the induced draft fan 21. In the utility model, the combustion chamber 3 and the furnace 18 are two independent entities. On the one hand, the induced draft fan 21 draws the smoke out of the room through the chimney 5, and uses the suction force of the induced draft fan 21 to draw part of the ash produced by the combustion through the side outlet of the furnace 18 through the side smoke cabinet 12. On the other hand, the combustion chamber blower 16 supplies air to the combustion chamber 3 to make the fuel burn more fully, and blow the ash produced by the combustion to the furnace 18 for storage. Therefore, the ash removal capacity is effectively enhanced, and there will be no ash accumulation and blockage in the combustion chamber 3, so that the range of optional fuels is wider, and the fuel cost of the machine is effectively reduced.

[0026] In the above technical solution, the utility model forms a gap between the outer shell 1 and the inner shell 2, namely, the cold air preheating gap 8, and then a heat sink 10 is attached to the outer surface of the inner shell 2. Two outer shell air inlets 6 are provided at one end of the outer shell 1, and the outer shell air outlet 19 is connected to the air inlet of the blower 4 through a connecting pipe 17 by utilizing the suction force of the blower 4.

[0027] In this way, the outside cold air enters from the air inlet 6 of the outer shell, passes through the cold air preheating gap 8 between the outer shell and the inner shell, flows through the inner shell 2, and then leads to the air outlet 19 of the outer shell 1, and then passes through the connecting pipe 17, and enters the blower 4 through the air inlet connecting pipe of the blower 4. When the utility model is used, when the combustion chamber is burning, the entire outer surface of the inner shell 2 is also subjected to heat transfer at the same time, so that the heat receiving area during the cold air preheating is increased by the heat dissipation plate 10 arranged on the outside of the inner shell 2, so as to achieve the purpose of fully utilizing the heat generated by the combustion chamber for preheating, and improve the heat exchange efficiency or effect of the hot air finally discharged.

[0028] Due to the adoption of the above technical solution, the utility model can greatly increase the air inlet temperature of the blower 4 by preheating the cold air, thereby improving the heat exchange effect and providing a higher hot air temperature when compared with the same ambient temperature.

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hot air blower, characterized in that: include: An outer shell (1), an inner shell (2), a combustion chamber (3), a heat dissipation component and a blower (4); a furnace chamber (18) is arranged in the inner shell (2); the combustion chamber (3) is arranged in the furnace chamber (18); the outlet side of the furnace chamber (18) is connected to a chimney (5) through the heat dissipation component; the outer shell (1) is provided with an outer shell air inlet (6), an outer shell air outlet (19) and a hot air outlet (7); the inner shell (2) is arranged in the outer shell (1) and a cold air preheating gap (8) is formed between the outer shell (1) and the inner shell (2); a heat exchange space (9) is formed between the inner wall of the inner shell (2) and the outer wall of the heat dissipation component; the outer shell air inlet (6) is connected to the air inlet of the blower (4) through the cold air preheating gap (8); the air outlet of the blower (4) is connected to the heat exchange space (9); and the heat exchange space (9) is connected to the hot air outlet (7).

2. The hot air blower according to claim 1, characterized in that: A heat sink (10) is provided in the cold air preheating gap (8), and the heat sink (10) is provided on the outer wall of the inner shell (2).

3. The hot air blower according to claim 1, characterized in that: The cold air preheating gap (8) is arranged around the entire outer surface of the inner shell (2).

4. The hot air blower according to claim 1, characterized in that: The heat dissipation component comprises a plurality of fin heat dissipation tubes (11) and a smoke cabinet (12) which are sequentially arranged in series.

5. The hot air blower according to claim 1, characterized in that: The hot air blower also includes a feeding auger tube (13) and a hopper (14); the lower end of the hopper (14) is connected to the feed port of the feeding auger tube (13); the discharge port of the feeding auger tube (13) extends into the combustion chamber (3); and an anti-flashback blower (15) is provided on the feeding auger tube (13).

6. The hot air blower according to claim 1, characterized in that: The cold air preheating gap (8) is connected to the air inlet of the blower (4) via a connecting pipe (17), and the chimney (5) runs through the connecting pipe (17).

7. The hot air blower according to claim 1, characterized in that: The hot air blower further comprises an induced draft fan (21), and the heat dissipation component is connected to the chimney (5) via the induced draft fan (21).

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