High-temperature hot blast stove with high heat dissipation efficiency

Abstract

This utility model relates to a high-efficiency heat dissipation high-temperature hot air furnace, including a furnace body and a guide fan connected to the furnace body. The furnace body is sequentially configured from the outside to the inside as an outer shell, a middle cavity, and an inner cavity, forming at least three internal spaces within the furnace body. A combustion chamber connected to the hot air space formed by the inner cavity is disposed within the hollow interior of the furnace body. A heat dissipation chamber adjacent to but not connected to the combustion chamber is also disposed within the furnace body. The heat dissipation chamber is located in the heat dissipation space formed between the outer shell and the middle cavity. The heat dissipation chamber has a first opening connected to the exhaust port of the guide fan. Several second openings are spaced apart along the circumference of the vertical upper end of the outer shell. This utility model, through layered design, forms independent heat dissipation and heat storage spaces, achieving functional zoning of "heat dissipation-heat storage-heating," which avoids melting of the outer shell due to high temperatures and reduces heat loss from the inner cavity, thereby improving thermal efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tea processing technology, and in particular to a high-temperature hot air furnace with high efficiency in heat dissipation. Background Technology

[0002] As the world's largest tea producer, my country's tea industry is a pillar industry in rural areas of southern mountainous regions. The efficiency and quality of tea processing directly affect tea farmers' income and the industry's competitiveness. In the initial processing of tea, fixation (or killing the green) is a crucial step that determines tea quality. Its core function is to destroy the enzyme activity in fresh leaves through high temperatures, while simultaneously releasing grassy odors and creating a unique aroma. Currently, the traditional fixation heating equipment widely used by tea farmers is mainly the ordinary contact-type hot air furnace. This type of equipment has the following significant technical defects in practical applications:

[0003] I. Low heating efficiency leads to extended production cycles

[0004] Traditional hot air furnaces typically employ a single-layer or simple double-layer structure, using coal, biomass pellets, or similar fuels. The radiant heat from fuel combustion is directly transferred to the tea leaves through a metal wok (contact heating). Due to outdated furnace design, the heat transfer path within the furnace is limited, and there is a lack of effective heat circulation, resulting in slow heating (usually requiring over 30 minutes to reach the 180-220℃ needed for fixing). This severely restricts the timeliness of tea processing. Especially during the peak spring tea harvesting season, inefficient fixing equipment becomes a bottleneck for increasing production capacity and may even lead to spoilage of the raw materials due to the inability to process fresh leaves in a timely manner.

[0005] II. Contact heating causes quality instability

[0006] Contact heating relies on direct heat conduction between the wok and the tea leaves. However, the temperature uniformity of different areas of the wok is difficult to control (temperature differences can reach over 30°C), easily causing localized overheating and scorching of the tea leaves or underheating (incomplete destruction of enzyme activity). This results in quality problems in the finished tea, such as cloudy liquor, mixed aromas, and uneven leaf appearance. Furthermore, traditional furnaces lack precise temperature control and heat storage buffer designs. Fluctuations in fuel combustion directly affect the furnace temperature, further exacerbating the instability of the fixation process and making it difficult to meet the demands of high-quality tea processing for refined processes such as "low-temperature slow fixation" and "high-temperature fast fixation."

[0007] To address the aforementioned issues, existing tea processing equipment, while attempting to heat and process tea leaves using traditional hot air furnaces, still relies on simple fans for air delivery and lacks a tiered airflow structure and balanced heat distribution design. This results in uneven hot air distribution within the processing area, leading to a phenomenon where the tea leaves are "overheated near the heat source and underheated further away." Furthermore, existing traditional hot air furnaces are not adapted to the heating and processing of tea leaves, and their components are not linked to a cooling system, resulting in significant heat loss. Therefore, developing a non-contact hot air processing device with efficient heat conduction, uniform temperature control, and waste heat recovery capabilities is an urgent need to improve tea processing quality and reduce energy consumption.

[0008] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this utility model, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that this utility model does not have the features of these prior art. On the contrary, this utility model has all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a high-efficiency heat dissipation high-temperature hot air furnace, comprising a furnace body and a guide fan connected to the furnace body. The furnace body is sequentially configured from the outside to the inside as an outer shell, a middle cavity, and an inner cavity, forming at least three internal spaces within the furnace body. A combustion chamber, connected to the hot air space formed by the inner cavity, is disposed within the hollow interior of the furnace body. A heat dissipation chamber, adjacent to but not connected to the combustion chamber, is also disposed within the furnace body. The heat dissipation chamber is located in the heat dissipation space formed between the outer shell and the middle cavity. The heat dissipation chamber has a first opening communicating with the exhaust port of the guide fan. Several second openings are spaced apart along the circumference of the vertical upper end of the outer shell.

[0010] According to a preferred embodiment, the vertical height of the first opening is less than the vertical height of a plurality of second openings, and the first opening and the plurality of second openings are separated by a vertically arranged partition plate. The partition plate is disposed within a heat dissipation space and extends vertically through the heat dissipation space.

[0011] According to a preferred embodiment, a horizontally oriented annular heat sink is disposed within the heat dissipation space. The annular heat sink covers the horizontal cross-section of the annular heat dissipation space. A partition plate penetrates the annular heat sink and divides the heat dissipation space into at least two spaces with its axis perpendicular to the vertical direction of the first opening.

[0012] According to a preferred embodiment, the annular heat sink has a plurality of heat dissipation holes for gas flow. The portion of the spacer plate located vertically below the annular heat sink also has a plurality of heat dissipation holes.

[0013] According to a preferred embodiment, a first opening is located vertically below the annular heat sink. A plurality of second openings are located vertically above the annular heat sink. The annular heat sink is positioned within the heat dissipation space corresponding to the combustion chamber.

[0014] According to a preferred embodiment, the air outlet of the guide fan is configured to penetrate the heat dissipation space and communicate with the heat storage space formed between the furnace cavity and the inner furnace cavity. The air outlet is provided with a connecting pipe to communicate with the heat storage space but not with the heat dissipation space.

[0015] According to a preferred embodiment, a heat storage element is provided within the heat storage space. The heat storage element is circumferentially wrapped around the outer wall of the furnace cavity.

[0016] According to a preferred embodiment, the hot air space has an exhaust vent communicating with the outside at its vertical end. The heat storage space has a hot air inlet at its vertical end.

[0017] According to a preferred embodiment, a feeding pipe is provided at the vertical end of the combustion chamber, the feeding pipe passing through the heat dissipation space and connecting to the outside.

[0018] According to a preferred embodiment, a cleaning chamber is provided at the vertical lower end of the combustion chamber, and the cleaning chamber is in contact with and slidably connected to the vertical bottom surface of the furnace body. Attached Figure Description

[0019] Figure 1 This is a simplified structural diagram of a high-efficiency heat dissipation high-temperature hot air furnace according to a preferred embodiment of the present invention.

[0020] Figure 2 This is a simplified cross-sectional view of a high-efficiency heat dissipation high-temperature hot air furnace according to a preferred embodiment of the present invention.

[0021] Figure 3 This is a simplified cross-sectional view of the uncut partition plate of a high-efficiency heat dissipation high-temperature hot air furnace according to a preferred embodiment of the present invention.

[0022] Figure 4 This is a simplified cross-sectional view of a high-temperature hot blast stove according to a preferred embodiment of the present invention, after removing the furnace cavity and the furnace inner cavity without cutting the partition plate.

[0023] List of reference numerals

[0024] 100: Furnace body; 101: Furnace outer shell; 102: Furnace cavity; 103: Furnace inner cavity; 104: Combustion chamber; 105: Heat dissipation chamber; 106: First opening; 107: Second opening; 108: Partition plate; 109: Annular heat sink; 110: Heat dissipation hole; 111: Heat storage component; 112: Exhaust vent; 113: Hot air vent; 114: Feeding pipe; 115: Ash removal chamber; 200: Blower fan; 201: Exhaust vent; 202: Air outlet; 301: Heat dissipation space; 302: Heat storage space; 303: Hot air space. Detailed Implementation

[0025] The following is a detailed explanation with reference to the accompanying drawings.

[0026] Example 1

[0027] This invention provides a high-efficiency heat dissipation high-temperature hot air furnace, such as... Figure 1 and Figure 2 As shown, a furnace body 100 and a guide fan 200 connected to the furnace body 100 are arranged sequentially from the outside to the inside as a furnace outer shell 101, a furnace middle cavity 102, and a furnace inner cavity 103 to form at least three internal spaces within the furnace body 100. A combustion chamber 104 is provided inside the hollow interior of the furnace body 100, connected to the hot air space 303 formed by the furnace inner cavity 103. A heat dissipation chamber 105 is also provided inside the furnace body 100, adjacent to but not connected to the combustion chamber 104. The heat dissipation chamber 105 is located in the heat dissipation space 301 formed between the furnace outer shell 101 and the furnace middle cavity 102. The heat dissipation chamber 105 is provided with a first opening 106 communicating with the exhaust port 201 of the guide fan 200. A plurality of second openings 107 are arranged at intervals along the circumference of the vertical upper end of the furnace outer shell 101. This invention utilizes a layered design to create independent heat dissipation space 301 (between the furnace outer shell 101 and the furnace cavity 102) and heat storage space 302 (between the furnace cavity 102 and the furnace inner cavity 103), achieving functional zoning for "heat dissipation-heat storage-heating." This prevents the furnace outer shell 101 from melting due to high temperatures and reduces heat loss from the furnace inner cavity 103, thereby improving thermal efficiency. The combustion chamber 104 is connected to the hot air space 303, ensuring that the heat generated by combustion is directly used to heat the hot air. The heat dissipation chamber 105 is adjacent to the combustion chamber 104 but not connected, using airflow to remove excess heat from the periphery of the combustion chamber 105 and prevent localized overheating. The exhaust port 201 of the blower 200 is connected to the first opening 106 of the heat dissipation chamber 105, drawing out the heat-absorbing gas from the heat dissipation chamber 105 by suction. Since the heat dissipation space 301 is also provided with several second openings 107, when air is drawn from the first opening 106, the outside air enters the heat dissipation space 301 through the second opening 107 under the action of negative pressure, and forms forced convection heat dissipation in a way that traverses the interior of the heat dissipation space 301, which significantly improves the efficiency compared to natural heat dissipation.

[0028] According to a preferred embodiment, the vertical height of the first opening 106 is less than the vertical height of a plurality of second openings 107, and the first opening 106 and the plurality of second openings 107 are separated by a vertically arranged partition 108. The partition 108 is disposed within the heat dissipation space 301 and extends vertically through the heat dissipation space 301. The height of the first opening 106 is lower than that of the second openings 106, thereby forcing airflow from the space entering through the second openings 106 to the first opening 106. Furthermore, due to the partition 108 dividing the interior, the air can traverse every part of the heat dissipation space 301, forming orderly convection, extending the residence time of air within the heat dissipation space 301, and improving heat dissipation efficiency.

[0029] According to a preferred embodiment, such as Figure 3 and Figure 4 As shown, a horizontally oriented annular heat sink 109 is provided within the heat dissipation space 301. The annular heat sink 109 covers the horizontal cross-section of the annular heat dissipation space 301. A partition plate 108 penetrates the annular heat sink 109, dividing the heat dissipation space 301 into at least two spaces with its axis perpendicular to the direction of the first opening 106. The annular heat sink 109 increases the heat dissipation area, rapidly absorbing heat from the furnace body through metal thermal conductivity, while simultaneously guiding airflow for uniform distribution, avoiding dead airflow zones within the heat dissipation space 301. The partition plate 108 penetrates the annular heat sink 109, dividing the heat dissipation space 301 into multiple independent areas, causing air to flow along different paths after being split, further enhancing the uniformity and efficiency of heat dissipation.

[0030] According to a preferred embodiment, the annular heat sink 109 is provided with a plurality of heat dissipation holes 110 for air circulation. The portion of the spacer plate 108 located vertically below the annular heat sink 109 is also provided with a plurality of heat dissipation holes 110. The plurality of heat dissipation holes 110 at the lower part of the annular heat sink 109 and the spacer plate 108 reduce airflow resistance, ensuring smooth airflow through the annular heat sink 109, while simultaneously increasing the contact area between the air and the annular heat sink 109, enhancing heat exchange, and preventing a decrease in heat dissipation efficiency due to airflow blockage.

[0031] According to a preferred embodiment, a first opening 106 is disposed vertically below the annular heat sink 109. A plurality of second openings 107 are disposed vertically above the annular heat sink 109. The annular heat sink 109 is disposed in the heat dissipation space 301 at a position corresponding to the combustion chamber 104. The first opening 106 below the annular heat sink 109 and the second openings 107 above it form a path of "air entering from above the annular heat sink 109 - passing through the annular heat sink 109 - exiting from below," allowing air to flow directly through the high-temperature area corresponding to the combustion chamber 104, specifically removing heat from the vicinity of the core heat source and improving the targeting of heat dissipation.

[0032] According to a preferred embodiment, the air outlet 202 of the guide fan 200 is configured to penetrate the heat dissipation space 301 and communicate with the heat storage space 302 formed between the furnace cavity 102 and the furnace inner cavity 103. The air outlet 202 is provided with a connecting pipe to communicate with the heat storage space 302 but not with the heat dissipation space 301. The second opening 107 of this invention is configured as a four-sided air intake on the furnace outer shell 101, which increases the air intake volume. External gas enters the second opening 107 through negative pressure, forming an airflow path of "four-sided air intake - penetrating the heat dissipation space 301 - exhausting from the first opening 106", so that the air traverses all parts of the furnace body, achieving uniform heat dissipation, and improving the overall heating efficiency from 1 hour to 10 minutes (hot air furnace body 300-400 degrees, easily melting the outer shell).

[0033] According to a preferred embodiment, a heat storage element 111 is provided within the heat storage space 302. The heat storage element 111 covers the outer wall of the furnace cavity 103 in a circumferential direction. The heat storage element 111 (such as a high specific heat capacity material) stores excess heat generated by combustion and releases it slowly during the heating process, reducing temperature fluctuations in the furnace cavity, ensuring stable hot air temperature, and reducing energy consumption caused by frequent heating.

[0034] According to a preferred embodiment, the hot air space 303 has an exhaust vent 112 communicating with the outside at its vertical end. The heat storage space 302 has a hot air inlet 113 at its vertical end. Preferably, the hot air inlet 113 is located on the opposite side of the heat storage space 302 relative to the air outlet 202 of the blower 200. Thus, hot air can flow through the heat storage space 302 to the hot air inlet 113, facilitating subsequent tea processing steps. This device is particularly suitable for heating tea leaves during the fixing process. By connecting the hot air inlet 113 to the area or container where the tea leaves are placed, heat is directly conducted to the tea leaves, ensuring even heating and improving the quality of the tea. The exhaust vent 112 is used to discharge the smoke and other gases generated during combustion in the combustion chamber 104, and it can be connected to external flue gas treatment equipment to prevent gas escape. Furthermore, the heat dissipation material in the combustion chamber 104 can be firewood, coal, or other fuels.

[0035] According to a preferred embodiment, a feed pipe 114 is provided at the vertical end of the combustion chamber 104. The feed pipe 114 passes through the heat dissipation space 301 and connects to the outside. The operator can directly add fuel to the combustion chamber 104 through the feed pipe 114. It should be noted that, because the feed pipe 114 is located on the inclined surface of the combustion chamber 104 and the hot air space 303 directly forms gas convection, the flue gas generated during combustion will not enter the feed pipe 114. Even if some flue gas does enter the feed pipe 114, it is negligible.

[0036] According to a preferred embodiment, a cleaning chamber 115 is provided at the vertically downward end of the combustion chamber 104. The cleaning chamber 115 contacts and is slidably connected to the vertical bottom surface of the furnace body 100. After the process is completed, the operator can remove the cleaning chamber 115 to periodically clean the residue after combustion, avoiding ash accumulation that affects the ventilation and combustion efficiency of the combustion chamber, extending the service life of the equipment. Maintenance is simple and does not require disassembly of the main structure. It should be noted that the sliding connection between the cleaning chamber 115 and the furnace body 100 is, for example, a drawer-type sliding connection. This implementation direction is clear and obvious, and therefore will not be described in detail. Furthermore, a mesh structure for supporting fuel is provided inside the combustion chamber 104, which can be made of metal. This mesh structure is schematically shown in the figures and is only for structural reference; it does not limit its specific arrangement or internal structure. Even without this mesh structure, the implementation of this invention is not affected.

[0037] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection scope. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. This utility model specification contains multiple inventive concepts; phrases such as "preferred" or "according to a preferred embodiment" indicate that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept. Throughout the text, the feature introduced by "preferred" is only an optional mode and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A high-temperature hot-air furnace with high heat dissipation, characterized in that, The furnace includes a furnace body (100) and a blower (200) connected to the furnace body (100). The furnace body (100) is configured from the outside to the inside as a furnace outer shell (101), a furnace middle cavity (102), and a furnace inner cavity (103) to form at least three internal spaces within the furnace body (100). A combustion chamber (104) is provided inside the hollow interior of the furnace body (100) and connected to a hot air space (303) formed by the furnace inner cavity (103). The furnace body (100) is also provided with a heat dissipation cavity (105) that is adjacent to but not connected to the combustion cavity (104). The heat dissipation cavity (105) is located in the heat dissipation space (301) formed between the furnace outer shell (101) and the furnace middle cavity (102). The heat dissipation cavity (105) is provided with a first opening (106) that is connected to the exhaust port (201) of the guide fan (200). The furnace outer shell (101) is provided with a plurality of second openings (107) arranged at intervals on the circumferential direction of the vertical upper end.

2. The high temperature hot air furnace of claim 1, wherein, The vertical height of the first opening (106) is less than the vertical height of the plurality of second openings (107), and the first opening (106) and the plurality of second openings (107) are separated by vertically arranged partitions (108), wherein, The partition plate (108) is disposed within the heat dissipation space (301) and extends vertically through the heat dissipation space (301).

3. The high temperature hot air furnace of claim 2, wherein, A horizontally oriented annular heat sink (109) is provided within the heat dissipation space (301), the annular heat sink (109) covering the horizontal cross-section of the annular heat dissipation space (301), wherein, The partition plate (108) penetrates the annular heat sink (109) and divides the heat dissipation space (301) into at least two spaces with the vertical direction perpendicular to the direction of the first opening (106) as the axis.

4. The high temperature hot air furnace of claim 3, wherein The annular heat sink (109) is provided with a plurality of heat dissipation holes (110) for gas flow, wherein, The spacer plate (108) located vertically below the annular heat sink (109) has a plurality of heat dissipation holes (110).

5. The high temperature hot air furnace of claim 4, wherein The first opening (106) is located vertically below the annular heat sink (109), and a plurality of second openings (107) are located vertically above the annular heat sink (109). The annular heat sink (109) is disposed in the heat dissipation space (301) at a position corresponding to the combustion chamber (104).

6. The high temperature hot air furnace of claim 5, wherein The air outlet (202) of the guide fan (200) is configured to penetrate the heat dissipation space (301) and communicate with the heat storage space (302) formed between the furnace cavity (102) and the furnace inner cavity (103), wherein, The air outlet (202) is provided with a connecting pipe to communicate with the temperature storage space (302) but not with the heat dissipation space (301).

7. The high temperature hot air oven of claim 6, wherein, The heat storage space (302) is provided with a heat storage component (111), which covers the outer wall of the furnace cavity (103) in a circumferential direction.

8. The high temperature hot air furnace of claim 7, wherein, The hot air space (303) is provided with an exhaust vent (112) communicating with the outside at its vertical end, and the heat storage space (302) is provided with a hot air vent (113) at its vertical end.

9. The high temperature hot air oven of claim 8, wherein, The combustion chamber (104) is provided with a feeding pipe (114) at its vertical end. The feeding pipe (114) passes through the heat dissipation space (301) and is connected to the outside.

10. The high temperature hot air furnace of claim 9, wherein, The combustion chamber (104) has a cleaning chamber (115) at its vertical lower end. The cleaning chamber (115) is in contact with the vertical bottom surface of the furnace body (100) and is slidably connected to the vertical bottom surface of the furnace body.

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