Air heater with air filtering structure

Abstract

This utility model discloses an air heater with an air filtration structure, including a housing. An air inlet pipe is located at the upper end of one side of the housing and connected to a filter device. The filter device includes a filter box, and a drive motor is located inside the filter box on the side away from the filter screen. A fan blade is mounted on a rotating shaft connected to the output end of the drive motor. A coupling located between the outer end of the rotating shaft and a first filter element, a protective sleeve, and a second filter element is connected to the filter screen. Activated carbon particles are filled in the cavity between the first and second filter elements. This air heater with an air filtration structure removes dust, particulate matter, and other impurities from the air by setting up a filter device, improving air cleanliness and extending the service life of the heating element. At the same time, the air circulation cavity inside the housing increases the airflow path length, effectively avoiding uneven heating of the air and improving heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of air heaters, specifically an air heater with an air filtration structure. Background Technology

[0002] In industries such as food processing, printing and dyeing, hardware, casting, painting, heating, and coating, air heaters are often used for heating and drying. An air heater is an electric heating device that primarily heats gas streams. The heating element of an air heater is a stainless steel electric heating tube. The heater's internal cavity is equipped with multiple baffles (guide plates) to guide the gas flow, prolonging the gas's residence time within the cavity, thereby ensuring thorough and uniform heating and improving heat exchange efficiency.

[0003] A search revealed that a typical example of an existing air heater is disclosed in CN208090957U, which includes a housing, a heating rod disposed within the housing, and a swirling baffle. The housing has an air inlet on its lower side wall and an air outlet on its top. The heating rod is positioned along the length of the housing, with one end mounted on one end of the housing. The swirling baffle spirals upwards along the length of the heating rod, with its inner side wrapped around the outer wall of the heating rod and its outer side connected to the housing. This air heater uses a spirally rising swirling baffle between the housing and the heating rod, forcing the air entering the housing to spiral upwards as it passes through, thus increasing the airflow path and further increasing the contact time and amount between the air and the heating rod, effectively improving heat exchange efficiency. Furthermore, the structural design of the swirling baffle reduces heat transfer dead zones formed inside the housing, preventing uneven heating of the air.

[0004] In summary, existing air heaters often suffer from dust, particulate matter, and other impurities in the ambient air. Without proper treatment, these impurities directly enter the air heater and adhere to the surface of the heating element, affecting heating efficiency, shortening the lifespan of the heating element, and increasing equipment maintenance costs. To address these issues, improvements to the existing equipment are necessary. Utility Model Content

[0005] The purpose of this utility model is to provide an air heater with an air filtration structure to solve the problem mentioned in the background art that when existing air heaters are in use, the ambient air often contains dust, particulate matter and other impurities. If these impurities are not treated, they will directly enter the air heater and adhere to the surface of the heating element, affecting the heating efficiency, shortening the service life of the heating element, and increasing the equipment maintenance cost.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an air heater with an air filtration structure, comprising a housing,

[0007] The top of the housing is provided with a sealing cover, and an air inlet pipe is provided at the upper end of one side of the housing. The outer end of the air inlet pipe is connected to a filter device. The filter device includes a filter box, and a filter screen is provided on the outside of the filter box. A drive motor is provided inside the filter box on the side away from the filter screen. The output end of the drive motor is connected to a rotating shaft, and a fan blade is provided on the rotating shaft. A coupling is provided between the first filter element, the protective sleeve, the second filter element, and the filter screen through the outer end of the rotating shaft. Activated carbon particles are filled in the cavity between the first filter element and the second filter element. Both the first filter element and the second filter element are composed of multiple layers of filter cotton. An activated carbon layer is detachably connected to the side of the second filter element near the filter screen.

[0008] Preferably, a first horizontal plate is provided inside the housing on one side below the air intake pipe, and a plurality of second partition plates are provided at equal intervals on the top of the first horizontal plate. The second partition plates are located between two adjacent first partition plates at the lower end of the sealing cover. A plurality of first inclined plates are provided at equal intervals at the lower end of the first horizontal plate, and a plurality of first heat conduction pipes are provided at equal intervals inside the first horizontal plate. The rear end of the first heat conduction pipes penetrates the housing and extends to the outside of the housing.

[0009] Preferably, a second horizontal plate is provided inside the housing below the first horizontal plate, and multiple second inclined plates are provided at equal intervals on the top of the second horizontal plate. The second inclined plates are staggered with the first inclined plate. Multiple second heat-conducting pipes are provided at equal intervals inside the second horizontal plate, and the rear end of the second heat-conducting pipes penetrates the housing and extends to the outside of the housing.

[0010] Preferably, an electric heating rod is provided inside the shell below the second horizontal plate, and the electric heating rod has a U-shaped structure. One side of the electric heating rod is connected to the inner side of the swirling baffle, while the outer side of the swirling baffle is connected to the bottom of the second horizontal plate and the inner wall of the lower end of the shell. The other side of the electric heating rod penetrates the lower rear end of the shell and is located inside the heat insulation frame. Multiple heat-conducting covers are inclinedly arranged at the upper end of the through holes equally spaced on the heat insulation frame. The heat-conducting covers cover the outer side of the inclined corresponding first and second heat-conducting pipes.

[0011] Preferably, an air outlet pipe is provided at the lower end of the other side of the housing, and the top of the air outlet pipe is connected to the guide flow box. At the same time, an air pump is provided at the top of the guide flow box, a temperature detector is provided on the front of the guide flow box, and an exhaust pipe is provided on the outside of the guide flow box.

[0012] Preferably, the filter box is provided with a cleaning component on the outside of the filter screen, and the cleaning component includes a movable frame. The two ends of the movable frame are slidably connected to the limiting frames provided on the upper and lower ends of the filter box. A positioning bearing is provided in the middle of the movable frame, and a connecting shaft is provided in the middle of the positioning bearing. A mounting seat is provided on the outer side of the connecting shaft near the filter screen. Cleaning brushes are symmetrically arranged on both sides of the mounting seat.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the air heater with an air filtration structure,

[0014] To address the problem that existing air heaters often suffer from dust, particulate matter, and other impurities in the ambient air, which, if left untreated, directly enter the heater and adhere to the heating element surface, affecting heating efficiency, shortening the heating element's lifespan, and increasing equipment maintenance costs, this application introduces a filtration device to remove dust, particulate matter, and other impurities from the air, improving air cleanliness and extending the heating element's lifespan. Simultaneously, the airflow cavity inside the housing increases the airflow path length, effectively preventing uneven heating and improving heat exchange efficiency. Attached Figure Description

[0015] Figure 1 This is a frontal cross-sectional view of the present invention.

[0016] Figure 2 This is a front view cross-sectional structural diagram of the filter device of this utility model;

[0017] Figure 3 This is a front view structural diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of the rear view structure of this utility model.

[0019] In the diagram: 1. Shell; 101. Heat insulation frame; 102. Heat conduction cover; 2. Sealing cover; 201. First partition plate; 3. Air inlet pipe; 4. Filter device; 401. Filter box; 4011. Limiting frame; 402. Filter screen; 4021. Coupling; 403. Drive motor; 404. Rotating shaft; 405. Fan blade; 406. First filter element; 407. Second filter element; 408. Protective sleeve; 409. Activated carbon granules; 4 10. Movable frame; 411. Positioning bearing; 412. Connecting shaft; 413. Mounting base; 414. Cleaning brush; 5. First horizontal plate; 501. Second partition plate; 502. First inclined plate; 503. First heat conduction pipe; 6. Second horizontal plate; 601. Second inclined plate; 602. Second heat conduction pipe; 7. Electric heating rod; 8. Swirl baffle; 9. Exhaust pipe; 10. Guide flow box; 11. Air pump; 12. Temperature detector; 13. Exhaust pipe. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-4 This utility model provides a technical solution: an air heater with an air filtration structure, according to... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a sealing cover 2 is provided on the top of the housing 1, and an air inlet pipe 3 is provided on the upper end of one side of the housing 1. The outer end of the air inlet pipe 3 is connected to the filter device 4. The filter device 4 includes a filter box 401, and a filter screen plate 402 is provided on the outer side of the filter box 401. A drive motor 403 is provided inside the filter box 401 on the side away from the filter screen plate 402. The output end of the drive motor 403 is connected to a rotating shaft 404, and a fan blade 405 is provided on the rotating shaft 404. A coupling 402 provided between the first filter element 406, the protective sleeve 408, the second filter element 407, and the filter screen plate 402 passes through one side of the outer end of the rotating shaft 404. 1. The cavity between the first filter element 406 and the second filter element 407 is filled with activated carbon particles 409. Both the first filter element 406 and the second filter element 407 are composed of multiple layers of filter cotton. At the same time, the activated carbon layer is detachably connected to the side of the second filter element 407 near the filter screen plate 402. The drive motor 403 drives the rotating shaft 404 to rotate, causing the fan blade 405 to rotate and generate suction. Then, the outside air enters the filter box 401 after being filtered by the filter screen plate 402. After being filtered and purified by the second filter element 407, activated carbon particles 409 and the first filter element 406 in sequence, it enters the housing 1 through the air inlet pipe 3.

[0022] To further explain, a cleaning assembly is provided on the outside of the filter screen plate 402 in the filter box 401. The cleaning assembly includes a movable frame 410. The two ends of the movable frame 410 are slidably connected to the limit frames 4011 corresponding to the upper and lower ends of the filter box 401. A positioning bearing 411 is provided in the middle of the movable frame 410, and a connecting shaft 412 is provided in the middle of the positioning bearing 411. A mounting base 413 is provided on the outer side of the end of the connecting shaft 412 near the filter screen plate 402. Cleaning brushes 414 are symmetrically arranged on both sides of the mounting base 413. By moving the movable frame 410, the connecting shaft 412 is connected to the coupling 4021, and the cleaning brushes 414 are in contact with the filter screen plate 402. Then, the drive motor 403 drives the rotating shaft 404 to rotate, and under the action of the coupling 4021, the connecting shaft 412 is rotated synchronously, so that the cleaning brushes 414 on the mounting base 413 clean the dust and impurities on the filter screen plate 402.

[0023] according to Figure 1 , Figure 3 and Figure 4As shown, a first horizontal plate 5 is provided inside the housing 1 on one side below the air inlet pipe 3, and multiple second partition plates 501 are equidistantly arranged on the top of the first horizontal plate 5. The second partition plates 501 are positioned between two adjacent first partition plates 201 at the lower end of the sealing cover 2. The use of the first partition plates 201 and the second partition plates 501 facilitates the division of the cavity between the upper end of the first horizontal plate 5 and the lower end of the sealing cover 2, extending the airflow path and the residence time of air within the cavity, thus improving heating efficiency. Multiple first inclined plates 502 are equidistantly arranged at the lower end of the first horizontal plate 5, and multiple first heat-conducting pipes 503 are equidistantly arranged inside the first horizontal plate 5. The rear end of the heat pipe 503 penetrates the housing 1 and extends to the outside of the housing 1. Inside the housing 1, below the first horizontal plate 5, a second horizontal plate 6 is arranged, and multiple second inclined plates 601 are equidistantly arranged on the top of the second horizontal plate 6. The second inclined plates 601 and the first inclined plate 502 are staggered. The combination of the second inclined plates 601 and the first inclined plate 502 facilitates the division of the cavity between the lower end of the first horizontal plate 5 and the upper end of the second horizontal plate 6, extending the airflow path and the residence time of air within the cavity, thus improving heating efficiency. Multiple second heat pipes 602 are equidistantly arranged inside the second horizontal plate 6, and the rear ends of the second heat pipes 602 penetrate the housing 1 and extend to the outside of the housing 1. An electric heating rod 7 is located below the second horizontal plate 6 inside the housing. The electric heating rod 7 has a U-shaped structure. One side of the electric heating rod 7 is connected to the inner side of the swirl baffle 8, while the outer side of the swirl baffle 8 is connected to the bottom of the second horizontal plate 6 and the inner wall of the lower end of the housing 1. The swirl baffle 8 increases the airflow path length and improves the heating effect. The other side of the electric heating rod 7 penetrates the lower rear end of the housing 1 and is located inside the heat insulation frame 101. Multiple heat-conducting covers 102 are inclinedly arranged at the upper end of the through holes equally spaced on the heat insulation frame 101. The heat-conducting covers 102 cover the outer side of the first heat-conducting pipe 503 and the second heat-conducting pipe 602, which are inclinedly arranged accordingly. The heat insulation frame 101 and the heat-conducting covers 102 are used in combination. This facilitates the transfer of heat generated by the electric heating rod 7 to the first heat-conducting pipe 503 and the second heat-conducting pipe 602, thereby heating the first horizontal plate 5 and the second horizontal plate 6, preheating the flowing air, and improving the heat utilization rate. An air outlet pipe 9 is provided at the lower end of the other side of the shell 1, and the top of the air outlet pipe 9 is connected to the guide flow box 10. At the same time, an air pump 11 is provided at the top of the guide flow box 10, a temperature detector 12 is provided on the front of the guide flow box 10, and an exhaust pipe 13 is provided on the outside of the guide flow box 10. The air pump 11 draws the heated gas from inside the shell 1 into the guide flow box 10 through the air outlet pipe 9, and after being detected by the temperature detector 12, it is discharged from the exhaust pipe 13.

[0024] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air heater with an air filtration structure, comprising a housing (1), characterized in that: The housing (1) is provided with a sealing cover (2) on the top, and an air inlet pipe (3) is provided on the upper end of one side of the housing (1). The outer end of the air inlet pipe (3) is connected to a filter device (4). The filter device (4) includes a filter box (401), and a filter screen plate (402) is provided on the outside of the filter box (401). At the same time, a drive motor (403) is provided on the side of the filter box (401) away from the filter screen plate (402). The output end of the drive motor (403) is connected to a rotating shaft (404), and a fan blade (404) is provided on the rotating shaft (404). 5) At the same time, the first filter element (406), the protective sleeve (408), and the second filter element (407) are connected to the coupling (4021) set in the middle of the filter screen plate (402) through the outer end of the rotating shaft (404). The cavity between the first filter element (406) and the second filter element (407) is filled with activated carbon particles (409). The first filter element (406) and the second filter element (407) are both composed of multiple layers of filter cotton. At the same time, the activated carbon layer is detachably connected to the side of the second filter element (407) near the filter screen plate (402).

2. The air heater having an air filtering structure according to claim 1, wherein: Inside the housing (1), a first horizontal plate (5) is provided on one side below the air inlet pipe (3), and multiple second partition plates (501) are provided at equal intervals on the top of the first horizontal plate (5). The second partition plates (501) are located between two adjacent first partition plates (201) at the lower end of the sealing cover (2). Multiple first inclined plates (502) are provided at equal intervals at the lower end of the first horizontal plate (5), and multiple first heat conduction pipes (503) are provided at equal intervals inside the first horizontal plate (5). The rear end of the first heat conduction pipe (503) penetrates the housing (1) and extends to the outside of the housing (1).

3. The air heater having an air filtering structure according to claim 1, wherein: Inside the housing (1), a second horizontal plate (6) is provided below the first horizontal plate (5), and multiple second inclined plates (601) are provided at equal intervals on the top of the second horizontal plate (6). The second inclined plates (601) and the first inclined plate (502) are staggered. Multiple second heat pipes (602) are provided at equal intervals inside the second horizontal plate (6), and the rear end of the second heat pipes (602) penetrates the housing (1) and extends to the outside of the housing (1).

4. The air heater having an air filtering structure according to claim 1, wherein: An electric heating rod (7) is provided inside the shell (1) below the second horizontal plate (6), and the electric heating rod (7) has a U-shaped structure. One side of the electric heating rod (7) is connected to the inner side of the swirling baffle (8), and the outer side of the swirling baffle (8) is connected to the bottom of the second horizontal plate (6) and the inner wall of the lower end of the shell (1). The other side of the electric heating rod (7) penetrates the lower rear end of the shell (1) and is located inside the heat insulation frame (101). Multiple heat-conducting covers (102) are inclinedly arranged on the upper end of the through holes equally spaced on the heat insulation frame (101). The heat-conducting covers (102) cover the outer side of the first heat-conducting pipe (503) and the second heat-conducting pipe (602) that are inclinedly arranged.

5. The air heater having an air filtering structure according to claim 1, wherein: An air outlet pipe (9) is provided at the lower end of the other side of the housing (1), and the top of the air outlet pipe (9) is connected to the guide flow box (10). At the same time, an air pump (11) is provided at the top of the guide flow box (10). A temperature detector (12) is provided on the front of the guide flow box (10), and an exhaust pipe (13) is provided on the outside of the guide flow box (10).

6. The air heater having an air filtering structure according to claim 1, wherein: The filter box (401) is provided with a cleaning component on the outside of the filter screen plate (402), and the cleaning component includes a movable frame (410). The two ends of the movable frame (410) are slidably connected to the limiting frames (4011) provided on the upper and lower ends of the filter box (401). A positioning bearing (411) is provided in the middle of the movable frame (410), and a connecting shaft (412) is provided in the middle of the positioning bearing (411). A mounting seat (413) is provided on the outer side of the connecting shaft (412) near the filter screen plate (402). Cleaning brushes (414) are symmetrically arranged on both sides of the mounting seat (413).

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