A high-efficiency heating stove

By introducing exhaust pressure control and heating mechanism into the warm air furnace, and using sensors to monitor the furnace status, the problems of low combustion efficiency and poor safety of traditional warm air furnaces are solved, achieving efficient combustion and safe heating.

CN224434688UActive Publication Date: 2026-06-30YANTAI SHANGMEILIJIA ENERGY SAVING TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YANTAI SHANGMEILIJIA ENERGY SAVING TECH CO LTD
Filing Date
2025-07-09
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional hot air furnaces have low combustion efficiency and serious energy waste. Their unreasonable structural design leads to significant heat loss, making them unable to meet the needs of energy conservation, environmental protection, and efficient heating. Furthermore, they lack effective internal pressure control and real-time monitoring, which affects combustion efficiency and safety.

Method used

A heating furnace with an exhaust and pressure control mechanism and a heating mechanism was designed. Temperature and pressure sensors are used to monitor the furnace status in real time. An exhaust valve and filter are provided to ensure safety. A fixed frame stabilizes the combustion chamber. The heating mechanism heats the gas through heat exchange tubes to generate warm air, thereby improving the heat utilization rate.

Benefits of technology

It has improved combustion efficiency, reduced safety hazards, reduced environmental pollution, extended equipment life, improved heat utilization and equipment reliability, and met the needs of efficient heating.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224434688U_ABST
    Figure CN224434688U_ABST
Patent Text Reader

Abstract

This utility model relates to the field of warm air furnace technology and discloses a warm air furnace with high combustion efficiency. The warm air furnace includes a combustion furnace body, on which a combustion mechanism, an exhaust and pressure control mechanism, and a warm air mechanism are provided. The exhaust and pressure control mechanism monitors the state inside the furnace through temperature and pressure sensors, maintains stable pressure through an exhaust valve and an exhaust pipe, and filters the exhaust through a filter screen. In the combustion mechanism, a fixed frame supports the combustion chamber, and the chip discharge port and waste chip collection box are easy to clean. All components are coated with a high-temperature resistant coating. The warm air mechanism uses the heat of combustion to heat the gas in the heat exchange tube to achieve warm air discharge. The heating placement frame has expandable functions. Compared with the prior art, this warm air furnace can effectively improve the overall combustion efficiency, reduce energy waste and pollutant generation through the coordinated work of multiple mechanisms, and improve the heat utilization rate. It has the advantages of reasonable structure, energy saving and environmental protection, and strong practicality.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of heating furnace technology, specifically a heating furnace with high combustion efficiency. Background Technology

[0002] In the industrial and residential heating sectors, traditional blast furnaces generally suffer from low combustion efficiency and significant energy waste. Incomplete combustion not only leads to insufficient fuel utilization but also generates a large amount of pollutants. Furthermore, the traditional furnace structure is poorly designed, resulting in significant heat loss and low heat conversion efficiency, failing to meet the dual demands of energy conservation, environmental protection, and efficient heating. Therefore, there is an urgent need to optimize the combustion mechanism and structure of blast furnaces.

[0003] The existing equipment may not effectively control the pressure inside the furnace, resulting in large fluctuations in the gas pressure inside the furnace during combustion. This affects the mixing ratio of fuel and air, leading to incomplete combustion and reduced combustion efficiency. Without temperature and pressure sensors to monitor the internal state of the furnace in real time, the combustion conditions cannot be adjusted in time, which may cause the combustion process to deviate from the optimal state and the fuel not being fully utilized. Utility Model Content

[0004] The purpose of this invention is to provide a hot air furnace with high combustion efficiency to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-efficiency hot air stove includes a combustion furnace body, a combustion mechanism provided on the surface of the combustion furnace body, an exhaust pressure control mechanism provided on the surface of the combustion furnace body, and a hot air mechanism provided on the surface of the combustion furnace body.

[0007] The exhaust and pressure control mechanism includes a detachable housing, which is installed on the top of both the left and right ends of the combustion furnace body. A temperature sensor and a pressure sensor are installed inside the detachable housing. A heat insulation plate is installed at the inner end of the detachable housing. A discharge valve is installed on the top of the back of the combustion furnace body, and an exhaust pipe is installed on the surface of the discharge valve. A filter screen is installed inside the exhaust pipe. During operation of the hot air furnace, the temperature and pressure sensors continuously monitor the internal state of the combustion furnace body, real-time monitoring the temperature and pressure. When the temperature or pressure exceeds a safety threshold, a signal is promptly issued to allow for appropriate measures to be taken to ensure safe operation of the equipment. After operation, harmful gases and high temperatures are discharged from the combustion furnace body through the discharge valve and exhaust pipe, maintaining stable internal pressure and preventing safety accidents caused by excessive pressure. This also provides a good combustion environment, improving combustion efficiency. The filter screen inside the exhaust pipe filters the discharged gas, preventing the discharge of solid particles and other impurities generated during combustion, reducing environmental pollution, and preventing impurities from clogging the exhaust pipe, ensuring unobstructed exhaust system operation.

[0008] Preferably, the temperature sensor is located at the top left end of the combustion furnace body, the air pressure sensor is located at the top right end of the combustion furnace body, and the filter screen is installed at the end of the exhaust pipe near the inner end of the combustion furnace body.

[0009] Preferably, the combustion mechanism includes a fixed frame, which is fixedly connected to the bottom of the combustion furnace body. A combustion chamber is inserted into the top of the fixed frame, and a chip discharge port is provided at the bottom of the combustion chamber. A bottom frame is fixedly connected to the bottom of the combustion furnace body, and a waste collection box is inserted into the bottom frame. The fixed frame provides stable support for the combustion chamber, ensuring that it will not shake or shift during combustion, thereby ensuring combustion stability and improving combustion efficiency. Dust and debris generated during combustion are discharged through the chip discharge port, and waste is collected in the waste collection box inside the bottom frame for easy centralized cleaning. Timely discharge of waste prevents the accumulation of waste from affecting combustion, ensuring complete combustion. The entire mechanism is coated with a high-temperature resistant coating, enabling it to withstand the high temperatures during combustion, making it less prone to damage, extending the service life of each component, and improving the reliability of the equipment.

[0010] Preferably, the surface of the fixing frame, the bottom of the combustion box, and the bottom of the combustion furnace are all provided with chip discharge ports, and all of the same size are provided.

[0011] Preferably, the surfaces of the fixing frame, combustion box, bottom frame and waste collection box are all coated with a high-temperature resistant coating, and the pore size of the filter screen is smaller than the minimum particle size of the combustible material in the combustion box.

[0012] Preferably, the heating mechanism includes a through-hole located at the top of the combustion chamber. A filter plate is installed inside the through-hole. A top frame is fixedly connected to the top of the combustion chamber. A top mounting box is installed inside the top frame. Mounting seats are fixedly connected to the left and right ends of the top of the top frame. A back box is installed on the back of the top mounting box. Mounting blocks are fixedly connected to the front ends of the left and right ends of the back box. A mounting plate is fixedly connected inside the back box. A fan is installed inside the mounting plate. Mounting openings are provided on both the front and back of the top mounting box. Heat exchange tubes are installed inside the mounting openings. A heating element is fixedly connected to the top of the top mounting box. The heated placement frame allows heat generated during combustion to be distributed into the top fixed box through a through-hole. At this time, a fan operates, blowing air through the heat exchange pipes. The heat heats the gas inside the heat exchange pipes, thus achieving the discharge of warm air. This design improves heat utilization efficiency, enabling the rapid generation of a large amount of warm air to meet usage needs. The various components are fixed using mounting brackets and blocks. This installation method ensures a firm connection between the components of the heating mechanism, resulting in a stable structure. It also facilitates installation and disassembly, making equipment maintenance and repair convenient. The heated placement frame on top can be used to place items that need to be heated, further expanding the functionality of the equipment and improving its practicality.

[0013] Preferably, the top fixing box is installed inside the top frame via a mounting base, and the back box is installed on the back of the top fixing box via a mounting block.

[0014] Preferably, the heat exchange tube is welded inside the mounting port, and the fan corresponds to the heat exchange tube.

[0015] Preferably, a side handle is fixedly connected to the bottom of both the left and right ends of the combustion furnace body, and an anti-scalding pad is installed on the surface of the side handle. A base is fixedly connected to the bottom of both the left and right ends of the combustion furnace body.

[0016] Preferably, a furnace door is installed on the front of the combustion furnace body, and an observation window is fixedly connected to the front of the furnace door. The furnace door is connected to the combustion furnace body by a hinge.

[0017] Compared with the prior art, this utility model provides a hot air furnace with high combustion efficiency, which has the following beneficial effects:

[0018] 1. This high-efficiency heating furnace is equipped with an exhaust and pressure control mechanism. During operation, temperature and pressure sensors continuously monitor the internal state of the furnace, tracking the temperature and pressure in real time. If the temperature or pressure exceeds a safety threshold, a signal is promptly issued to allow for appropriate measures to ensure safe operation. After operation, harmful gases and high temperatures are discharged from the furnace via the exhaust valve and exhaust pipe, maintaining stable internal pressure and preventing accidents caused by excessive pressure. This also provides a favorable environment for combustion, improving efficiency. The filter inside the exhaust pipe filters the exhaust gas, preventing solid particles and other impurities from being discharged, reducing environmental pollution and preventing blockage of the exhaust pipe, ensuring a smooth exhaust system.

[0019] 2. This high-efficiency warm air furnace is equipped with a combustion mechanism. A fixed frame is securely connected inside the furnace body, providing stable support for the combustion chamber and ensuring it does not shake or shift during combustion. This guarantees combustion stability and improves combustion efficiency. Dust and debris generated during combustion are discharged through the debris discharge port, and the waste debris is collected in a waste debris collection box inside the bottom frame for easy cleaning. Timely discharge of waste debris prevents its accumulation from affecting combustion, ensuring complete combustion. The entire mechanism is coated with a high-temperature resistant coating, enabling it to withstand the high temperatures during combustion, reducing damage, extending the service life of each component, and improving the reliability of the equipment.

[0020] 3. This high-efficiency heating furnace is equipped with a heating mechanism. The heat generated by combustion is distributed into the top fixed box through the through-hole. At this time, the fan works and blows air through the heat exchange tubes. The heat heats the gas inside the heat exchange tubes, thereby realizing the discharge of warm air. This design improves the utilization rate of heat and can quickly generate a large amount of warm air to meet the usage needs. The various components are fixed by mounting brackets and mounting blocks. This installation method makes the various components of the heating mechanism firmly connected and the structure stable. It also facilitates installation and disassembly, making the equipment easy to maintain and repair. The heating placement frame on the top can be used to place items that need to be heated, further expanding the function of the equipment and improving its practicality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the exhaust and pressure control mechanism of this utility model.

[0025] Figure 4 This is a schematic diagram of the filter plate structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the air fan structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the heating mechanism of this utility model;

[0028] Figure 7 This is a schematic diagram of the discharge valve structure of this utility model.

[0029] In the diagram: 1. Combustion furnace body; 2. Side handle; 3. Anti-scalding pad; 4. Base; 5. Furnace door; 6. Observation window; 7. Combustion mechanism; 71. Fixing frame; 72. Combustion box body; 73. Chip discharge port; 74. Bottom frame; 75. Waste collection box; 8. Exhaust and pressure control mechanism; 81. Detachable box body; 82. Temperature sensor; 83. Pressure sensor; 84. Heat insulation plate; 85. Discharge valve; 86. Exhaust pipe; 87. Filter screen; 9. Warm air mechanism; 91. Through port; 92. Filter plate; 93. Top frame; 94. Top fixing box; 95. Mounting base; 96. Back box body; 97. Mounting block; 98. Mounting plate; 99. Fan; 901. Mounting port; 902. Heat exchange tube; 903. Heating placement frame. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] This utility model provides the following technical solution:

[0033] Example 1

[0034] Please see Figure 1-7 A high-efficiency hot air furnace includes a combustion furnace body 1, a combustion mechanism 7 provided on the surface of the combustion furnace body 1, an exhaust pressure control mechanism 8 provided on the surface of the combustion furnace body 1, and a hot air mechanism 9 provided on the surface of the combustion furnace body 1.

[0035] The exhaust and pressure control mechanism 8 includes a detachable housing 81, which is installed on the top of both the left and right ends of the combustion furnace body 1. A temperature sensor 82 and a pressure sensor 83 are installed inside the detachable housing 81. A heat insulation plate 84 is installed inside the inner end of the detachable housing 81. A discharge valve 85 is installed on the top of the back of the combustion furnace body 1, and an exhaust pipe 86 is installed on the surface of the discharge valve 85. A filter screen 87 is installed inside the exhaust pipe 86. During the operation of the hot air furnace, the temperature sensor 82 and the pressure sensor 83 continuously monitor the internal state of the combustion furnace body 1, and monitor the temperature and pressure inside the combustion furnace body 1 in real time. When the temperature or air pressure exceeds the safety threshold, a signal can be sent in time so that corresponding measures can be taken to ensure the safe operation of the equipment. After the work is completed, the harmful gases and high temperature inside the combustion furnace body 1 can be discharged through the discharge valve 85 and the exhaust pipe 86 to maintain the stable pressure inside the furnace and avoid safety accidents caused by excessive pressure. At the same time, it provides a good environment for combustion, which is conducive to improving combustion efficiency. The filter screen 87 inside the exhaust pipe 86 can filter the discharged gas, prevent the discharge of impurities such as solid particles generated during the combustion process, reduce environmental pollution, and also prevent impurities from clogging the exhaust pipe 86, ensuring the smooth flow of the exhaust system.

[0036] Temperature sensor 82 is located at the top left end of combustion furnace body 1, air pressure sensor 83 is located at the top right end of combustion furnace body 1, and filter screen 87 is installed at the end of exhaust pipe 86 near the inner end of combustion furnace body 1.

[0037] Example 2

[0038] Please see Figure 1-7Based on Embodiment 1, the combustion mechanism 7 further includes a fixed frame 71, which is fixedly connected to the bottom of the combustion furnace body 1. A combustion box 72 is inserted into the top of the fixed frame 71, and a chip discharge port 73 is provided at the bottom of the combustion box 72. A bottom frame 74 is fixedly connected to the bottom of the combustion furnace body 1, and a waste collection box 75 is inserted into the bottom frame 74. The fixed frame 71 provides stable support for the combustion box 72, ensuring that the combustion box 72 will not shake or shift during combustion, thereby ensuring combustion stability and improving combustion efficiency. Dust and debris generated during combustion are discharged through the chip discharge port 73, and the waste is collected in the waste collection box 75 inside the bottom frame 74 for easy centralized cleaning. Timely discharge of waste avoids the impact of waste accumulation on combustion, ensuring complete combustion. The entire mechanism is coated with a high-temperature resistant coating, enabling it to withstand the high temperatures during combustion, making it less prone to damage, extending the service life of each component, and improving the reliability of the equipment.

[0039] Chip discharge ports 73 are provided on the surface of the fixed frame 71, the bottom of the inside of the combustion box 72, and the bottom of the inside of the combustion furnace 1, and all of the same size are provided.

[0040] The surfaces of the mounting frame 71, combustion chamber 72, bottom frame 74 and waste collection box 75 are all coated with a high-temperature resistant coating, and the pore size of the filter screen is smaller than the minimum particle size of the combustible material inside the combustion chamber 72.

[0041] The heating mechanism 9 includes a through-hole 91 located at the top of the combustion furnace body 1. A filter plate 92 is installed inside the through-hole 91. A top frame 93 is fixedly connected to the top of the combustion furnace body 1. A top mounting box 94 is installed inside the top frame 93. Mounting seats 95 are fixedly connected to the left and right ends of the top of the top frame 93. A back box 96 is installed on the back of the top mounting box 94. Mounting blocks 97 are fixedly connected to the front ends of the left and right ends of the back box 96. A mounting plate 98 is fixedly connected inside the back box 96. A fan 99 is installed inside the mounting plate 98. Mounting ports 901 are opened on both the front and back of the top mounting box 94. Heat exchange tubes 902 are installed inside the mounting ports 901. A heating element is fixedly connected to the top of the top mounting box 94. The heat generated by combustion is distributed into the top fixed box 94 through the through-hole 91 in the placement frame 903. At this time, the fan 99 works and blows air through the heat exchange tube 902. The heat will heat the gas inside the heat exchange tube 902, thereby realizing the discharge of warm air. This design improves the utilization rate of heat and can quickly generate a large amount of warm air to meet the needs of use. The components are fixed by the mounting base 95 and the mounting block 97. This installation method makes the components of the heating mechanism 9 firmly connected and the structure stable. It is also easy to install and disassemble, and facilitates the maintenance and repair of the equipment. The heating placement frame 903 on the top can be used to place items that need to be heated, further expanding the function of the equipment and improving its practicality.

[0042] The top fixed box 94 is installed inside the top frame 93 via the mounting base 95, and the back box 96 is installed on the back of the top fixed box 94 via the mounting block 97.

[0043] The heat exchange tube 902 is welded inside the mounting port 901, and the fan 99 corresponds to the heat exchange tube 902.

[0044] Side handles 2 are fixedly connected to the bottom of the left and right ends of the combustion furnace body 1. Anti-scalding pads 3 are installed on the surface of the side handles 2. Bases 4 are fixedly connected to the bottom of the left and right ends of the combustion furnace body 1.

[0045] A furnace door 5 is installed on the front of the combustion furnace body 1. An observation window 6 is fixedly connected to the front of the furnace door 5. The furnace door 5 is connected to the combustion furnace body 1 by a hinge.

[0046] In actual operation, when this device is used, the furnace door 5 is opened, the combustible material is placed inside the combustion chamber 72 and ignited. The fixing frame 71 is fixedly connected to the inside of the combustion furnace body 1, providing stable support for the combustion chamber 72 and ensuring that the combustion chamber 72 will not shake or shift during combustion, thereby ensuring combustion stability and improving combustion efficiency. The dust and debris generated during combustion are discharged through the chip discharge port 73, and the waste chips are collected in the waste chip collection box 75 inside the bottom frame 74 for easy centralized cleaning. The timely discharge of waste chips avoids the impact of waste chip accumulation on combustion, ensuring complete combustion. The entire mechanism is coated with a high-temperature resistant coating, which enables it to withstand the high temperatures during combustion, making it less prone to damage, extending the service life of each component, and improving the reliability of the equipment.

[0047] During the operation of the hot air furnace, the internal state of the combustion furnace body 1 is constantly monitored by temperature sensor 82 and air pressure sensor 83. The temperature and air pressure inside the combustion furnace body 1 are monitored in real time. When the temperature or air pressure exceeds the safety threshold, a signal can be sent in time so that corresponding measures can be taken to ensure the safe operation of the equipment. After the operation is completed, harmful gases and high temperatures inside the combustion furnace body 1 can be discharged through the exhaust valve 85 and exhaust pipe 86 to maintain stable pressure inside the furnace and avoid safety accidents caused by excessive pressure. At the same time, it provides a good environment for combustion, which is conducive to improving combustion efficiency. The filter screen 87 inside the exhaust pipe 86 can filter the discharged gas, prevent the discharge of impurities such as solid particles generated during the combustion process, reduce environmental pollution, and also prevent impurities from clogging the exhaust pipe 86, ensuring the smooth flow of the exhaust system.

[0048] The heat generated by combustion is distributed into the top fixed box 94 through the through-hole 91. At this time, the fan 99 works and blows air through the heat exchange tube 902. The heat will heat the gas inside the heat exchange tube 902, thereby realizing the discharge of warm air. This design improves the utilization rate of heat and can quickly generate a large amount of warm air to meet the needs of use. The components are fixed by the mounting base 95 and the mounting block 97. This installation method makes the components of the heating mechanism 9 firmly connected and the structure stable. It is also easy to install and disassemble, and facilitates the maintenance and repair of the equipment. The heating placement frame 903 on the top can be used to place items that need to be heated, further expanding the function of the equipment and improving its practicality.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A high-efficiency hot air furnace, comprising a combustion furnace body (1), characterized in that: The combustion furnace body (1) is provided with a combustion mechanism (7), an exhaust pressure control mechanism (8), and a heating mechanism (9). The exhaust pressure control mechanism (8) includes a detachable box (81), which is installed on the top of the left and right ends of the combustion furnace body (1). A temperature sensor (82) is installed inside the detachable box (81), a pressure sensor (83) is installed inside the detachable box (81), a heat insulation plate (84) is installed at the inner end of the detachable box (81), and an exhaust valve (85) is installed on the top of the back of the combustion furnace body (1). An exhaust pipe (86) is installed on the surface of the exhaust valve (85), and a filter screen (87) is installed at the inner end of the exhaust pipe (86).

2. The high-efficiency hot air furnace according to claim 1, characterized in that: The temperature sensor (82) is located at the top left end of the combustion furnace body (1), the air pressure sensor (83) is located at the top right end of the combustion furnace body (1), and the filter (87) is installed at the end of the exhaust pipe (86) near the inner end of the combustion furnace body (1).

3. A high-efficiency hot air furnace according to claim 1, characterized in that: The combustion mechanism (7) includes a fixed frame (71), which is fixedly connected to the bottom of the combustion furnace body (1). A combustion box (72) is inserted into the top of the fixed frame (71). A chip discharge port (73) is opened at the bottom of the combustion box (72). A bottom frame (74) is fixedly connected to the bottom of the combustion furnace body (1). A waste collection box (75) is inserted into the bottom frame (74).

4. A high-efficiency hot air furnace according to claim 3, characterized in that: The surface of the fixing frame (71), the bottom of the combustion box (72) and the bottom of the combustion furnace (1) are all provided with chip discharge ports (73), and the specifications and sizes are all the same.

5. A high-efficiency hot air furnace according to claim 3, characterized in that: The surfaces of the fixing frame (71), combustion box (72), bottom frame (74) and waste collection box (75) are all coated with a high-temperature resistant coating, and the pore size of the filter screen is smaller than the minimum particle size of the combustible material inside the combustion box (72).

6. A high-efficiency hot air furnace according to claim 1, characterized in that: The heating mechanism (9) includes a through-hole (91), which is located at the top of the combustion furnace body (1). A filter plate (92) is installed inside the through-hole (91). A top frame (93) is fixedly connected to the top of the combustion furnace body (1). A top fixing box (94) is provided inside the top frame (93). Mounting seats (95) are fixedly connected to the left and right ends of the top of the top frame (93). A back box (96) is installed on the back of the top fixing box (94). Mounting blocks (97) are fixedly connected to the front ends of the left and right ends of the back box (96). A mounting plate (98) is fixedly connected inside the back box (96). A fan (99) is installed inside the mounting plate (98). An installation port (901) is provided on both the front and back of the top fixing box (94). A heat exchange tube (902) is installed inside the installation port (901). A heating placement frame (903) is fixedly connected to the top of the top fixing box (94).

7. A high-efficiency hot air furnace according to claim 6, characterized in that: The top fixed box (94) is installed inside the top frame (93) via the mounting base (95), and the back box (96) is installed on the back of the top fixed box (94) via the mounting block (97).

8. A high-efficiency hot air furnace according to claim 6, characterized in that: The heat exchange tube (902) is welded inside the mounting port (901), and the fan (99) corresponds to the heat exchange tube (902).

9. A high-efficiency hot air furnace according to claim 1, characterized in that: Side handles (2) are fixedly connected to the bottom of the left and right ends of the combustion furnace body (1). Anti-scalding pads (3) are installed on the surface of the side handles (2). Bases (4) are fixedly connected to the bottom of the left and right ends of the combustion furnace body (1).

10. A high-efficiency hot air furnace according to claim 1, characterized in that: The combustion furnace body (1) is equipped with a furnace door (5) on the front side, and an observation window (6) is fixedly connected to the front side of the furnace door (5). The furnace door (5) is connected to the combustion furnace body (1) by a hinge.