Heater ventilation filter structure

Abstract

The present invention relates to the technical field of heating devices, and specifically to a ventilation and filtering structure of a heater. It includes an air inlet pipe and an air outlet box with an inner cavity, the air inlet pipe is connected to the inner cavity of the air outlet box, an exhaust pipe connected to the inner cavity of the air outlet box is arranged at the bottom of the air outlet box, a filter screen is arranged above the exhaust pipe, and a cleaning mechanism is arranged above the filter screen; the cleaning mechanism includes a mounting plate, a transmission shaft, a cleaning brush and a driving mechanism, the mounting plate is arranged on the air outlet box, the driving mechanism is arranged on the mounting plate, the output end of the driving mechanism is connected to the transmission shaft, the cleaning brush is fixedly connected to the lower end of the transmission shaft, and the cleaning brush abuts against the upper surface of the filter screen. The present invention, by arranging a mounting plate, a transmission shaft, a cleaning brush and a driving mechanism, the transmission shaft is driven to rotate by the driving mechanism, the transmission shaft drives the cleaning brush to rotate, and the cleaning brush abuts against the upper surface of the filter screen, thereby achieving the cleaning of dust on the filter screen.

Description

Technical Field

[0001] The invention relates to the technical field of heating devices, in particular to a ventilation and filtering structure of a heater. Background Art

[0002] A heater is a system or related equipment that is responsible for heating, ventilation and air conditioning in a room or car. The design of a heater is applied to thermodynamics, fluid mechanics and fluid machinery, and is an important branch of mechanical engineering. Its function is to create an indoor artificial environment that is beneficial to human survival.

[0003] The working principle of a household electric fan heater is to heat the cold air through an air heater, and then blow the warm air out through a fan. The blown warm air is led into the room through ventilation ducts, so that the indoor air temperature can be adjusted. Due to the presence of impurities such as dust in the air, in order to reduce the amount of dust in the warm air leading to the room, it is often necessary to set a filter on the ventilation duct of the fan heater to filter the dust in the warm air. If there is too much dust in the environment and the fan heater is used for a long time, a lot of dust will accumulate on the filter, resulting in poor air circulation and affecting the ventilation effect of the fan heater. At this time, in order to meet the demand for warm air, the output power of the warm air is usually increased, resulting in energy waste. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a ventilation filter structure for a heater, which is used for cleaning dust on a filter net.

[0005] The technical solution adopted by the present invention to solve the technical problem is a ventilation and filtering structure of a heater, comprising an air inlet pipe and an air outlet box with an inner cavity, wherein the air inlet pipe is connected to the inner cavity of the air outlet box, an exhaust pipe connected to the inner cavity of the air outlet box is arranged at the bottom of the air outlet box, a filter screen is arranged above the exhaust pipe, and a cleaning mechanism is arranged above the filter screen;

[0006] The cleaning mechanism includes a mounting plate, a transmission shaft, a cleaning brush and a driving mechanism. The mounting plate is arranged on the air outlet box, the driving mechanism is arranged on the mounting plate, the output end of the driving mechanism is transmission-connected to the transmission shaft, the cleaning brush is fixedly connected to the lower end of the transmission shaft, and the cleaning brush abuts against the upper surface of the filter.

[0007] Furthermore, one of the side walls of the air outlet box is opened, and a closing plate is detachably connected to the opening, and a supporting plate extending toward the inner cavity of the air outlet box is provided on the closing plate, and the filter is installed at the bottom of the supporting plate, and a mounting frame is provided above the supporting plate, and the transmission shaft is rotatably connected to the mounting frame, and a control block is provided at the output end of the driving mechanism, and the control block is magnetically connected to the transmission shaft.

[0008] Furthermore, a control cylinder is arranged between the output end of the driving mechanism and the control block, and the control cylinder is fixedly connected to the output end of the driving mechanism. A control shaft is arranged above the control block, and the radial outer wall of the control shaft is slidably fitted with the radial inner wall of the control cylinder. A transmission pin is fixedly installed on the radial outer wall of the control shaft, and the outer wall of the control cylinder is provided with a waist-shaped groove for the transmission pin to slide.

[0009] Furthermore, a mounting bracket is sleeved on the outer side of the control shaft, the mounting bracket is fixedly connected to the air outlet box, the control block is elastically connected to the mounting bracket, a transmission pad is fixedly installed on the bottom surface of the control block, and an anti-slip pad is fixedly installed on the upper end of the transmission shaft.

[0010] Furthermore, a shock absorber is arranged on the mounting plate, one end of the shock absorber is fixedly connected to the mounting plate, and the other end of the shock absorber is fixedly connected to the air outlet box.

[0011] Furthermore, a connecting shaft is elastically mounted on the upper end surface of the bearing plate, and one axial end of the connecting shaft extends to the bottom surface of the bearing plate and is detachably connected to the filter screen;

[0012] An information collection module is arranged on the carrying plate, and an alarm module is arranged on the outer wall of the air outlet box.

[0013] Further, the information acquisition module includes a pressure sensor and an information transmission module, and the pressure sensor is used to detect the pressure of the connecting shaft on the upper end surface of the bearing plate;

[0014] The alarm module includes an execution module and a logic controller;

[0015] The logic controller receives the pressure signal fed back by the pressure sensor through the information transmission module, and the logic controller controls the execution module to generate an alarm signal through the pressure signal.

[0016] Furthermore, a connecting rod is provided on the air outlet box, one end of the connecting rod is hinged to the air outlet box, and a connecting sleeve is rotatably mounted on the other end of the connecting rod, and a mounting rod is mounted on the inner wall of the connecting sleeve through internal and external threads.

[0017] Furthermore, the air inlet pipe is connected to the air outlet box via a bellows, and a bearing rod is fixedly mounted on the upper end surface of the air inlet pipe.

[0018] Furthermore, an air guide frame is provided below the exhaust duct, and the air guide frame is fixedly connected to the air outlet box.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention is provided with a mounting plate, a transmission shaft, a cleaning brush and a driving mechanism. The driving mechanism drives the transmission shaft to rotate, and the transmission shaft drives the cleaning brush to rotate. The cleaning brush abuts against the upper surface of the filter net, thereby achieving dust cleaning on the filter net.

[0021] 2. The present invention sets a connecting shaft, one end of which passes through the bearing plate and is connected to the filter, and the spring on the outer wall of the connecting shaft is connected to the pressure information collection end of the pressure sensor. When the air pass rate of the filter decreases, the filter and the connecting shaft slide downward, and the pressure signal detected by the pressure sensor increases. When the pressure signal reaches a value that requires replacement of the filter, the logic controller controls the buzzer to sound an alarm, so that the filter can be replaced on time to prevent the filter from still working after being blocked, thereby saving energy for air supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the installation of the air guide frame in the present invention;

[0024] Figure 3 It is a schematic diagram of the installation of the load-bearing plate in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the mounting frame of the present invention;

[0026] Figure 5 It is a schematic diagram of the installation of the cleaning brush in the present invention;

[0027] Figure 6 It is a schematic diagram of the installation of the connecting shaft in the present invention;

[0028] Figure 7 It is a schematic diagram of the connection between the control block and the control cylinder in the present invention;

[0029] Figure 8 It is a structural schematic diagram of the connecting rod in the present invention.

[0030] Figure numerals: 1. air outlet box; 2. alarm module; 3. air guide frame; 5. shock absorber; 6. closing plate; 7. mounting plate; 8. driving mechanism; 9. mounting bracket; 10. cleaning brush; 11. transmission pad; 12. bearing plate; 13. exhaust duct; 14. filter screen; 15. connecting shaft; 16. mounting bracket; 17. control cylinder; 18. transmission shaft; 19. anti-slip pad; 20. control block; 21. information acquisition module; 22. control shaft; 23. transmission pin; 24. connecting rod; 25. connecting sleeve; 26. mounting rod; 27. bellows; 28. air inlet pipe; 29. ​​bearing rod. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] like Figure 1-Figure 8 As shown, the ventilation and filtering structure of the heater of the present invention comprises an air inlet pipe 28 and an air outlet box 1 with an inner cavity, wherein the air inlet pipe 28 is connected to the inner cavity of the air outlet box 1, an exhaust pipe 13 connected to the inner cavity of the air outlet box 1 is arranged at the bottom of the air outlet box 1, a filter screen 14 is arranged above the exhaust pipe 13, and a cleaning mechanism is arranged above the filter screen 14;

[0033] The cleaning mechanism includes a mounting plate 7, a transmission shaft 18, a cleaning brush 10 and a driving mechanism 8. The mounting plate 7 is arranged on the air outlet box 1, and the driving mechanism 8 is arranged on the mounting plate 7. The output end of the driving mechanism 8 is transmission-connected to the transmission shaft 18, and the cleaning brush 10 is fixedly connected to the lower end of the transmission shaft 18, and the cleaning brush 10 abuts against the upper surface of the filter 14.

[0034] Among them, the air inlet pipe 28 is connected with the output end of the heater, and the air inlet pipe 28 is connected with the inner cavity of the air outlet box 1. The warm air output from the heater enters the air outlet box 1 through the air inlet pipe 28, and then is discharged from the exhaust pipe 13 to the room. The filter 14 is used to filter dust and other impurities in the warm air, and the cleaning mechanism is used to clean the impurities on the filter 14. The mounting plate 7 can be fixedly mounted on the air outlet box 1. It should be noted that the mounting plate 7 can be mounted in the inner cavity of the air outlet box 1 or on the outside of the air outlet box 1. The mounting plate 7 provides a mounting position for the driving mechanism 8. The driving mechanism 8 can use a servo motor. The output end of the driving mechanism 8 is vertically arranged and connected to the transmission shaft 18, that is, the driving mechanism 8 can drive the transmission shaft 18 to rotate. The cleaning brush 10 is bolted to the transmission shaft 18. The lower end surface of the cleaning brush 10 is provided with flexible bristles. When the driving mechanism 8 drives the transmission shaft 18 to rotate, the flexible bristles on the cleaning brush 10 rotate relative to the filter 14 to achieve the cleaning of dust on the filter 14.

[0035] In order to facilitate the replacement of the filter 14, further see Figure 3One of the side walls of the air outlet box 1 is opened, and a closing plate 6 is detachably connected to the opening. A carrying plate 12 extending toward the inner cavity of the air outlet box 1 is provided on the closing plate 6. The filter 14 is mounted on the bottom of the carrying plate 12. A mounting frame 16 is provided above the carrying plate 12. The transmission shaft 18 is rotatably connected to the mounting frame 16. A control block 20 is provided at the output end of the driving mechanism 8, and the control block 20 is magnetically connected to the transmission shaft 18. Among them, the closing plate 6 can be connected to the air outlet box 1 by bolting, the supporting plate 12 is horizontally arranged and located above the exhaust tube 13; the filter screen 14 can be installed at the bottom of the supporting plate 12 by bolting; the mounting frame 16 is used to install the transmission shaft 18, and the transmission shaft 18 is connected to the mounting frame 16 by a bearing, so that the transmission shaft 18 can rotate relative to the mounting frame 16; the control block 20 is a common neodymium iron boron magnet or an electromagnet, and the transmission shaft 18 is a common stainless steel material that can be attracted by a magnet. When in use, the transmission shaft 18 is attracted by the control block 20, so that the control block 20 can transmit the rotational force provided by the driving mechanism 8 to the transmission shaft 18, so that the transmission shaft 18 rotates. When replacing the filter 14, the closing plate 6 is removed from the air outlet box 1 and the carrying plate 12 is pulled outward. Since the filter 14 is mounted on the carrying plate 12 and the transmission shaft 18 is magnetically connected to the control block 20, the filter 14, the transmission shaft 18 and the mounting frame 16 can be pulled out together. After replacing the filter 14, the carrying plate 12 is placed inside the air outlet box 1 so that the filter 14 is located above the exhaust tube 13. The control block 20 is attracted to the transmission shaft 18, and the driving mechanism 8 drives the control block 20 to rotate, so that the cleaning brush 10 can clean the replaced filter 14, which is very convenient to replace.

[0036] Since the driving mechanism 8 may vibrate up and down during use, the transmission shaft 18 may vibrate up and down, thereby causing the cleaning brush 10 to move away from or close to the filter screen 14. In order to reduce the up and down movement of the cleaning brush 10 relative to the filter screen 14, further, see Figure 4-Figure 7A control cylinder 17 is arranged between the output end of the driving mechanism 8 and the control block 20. The control cylinder 17 is fixedly connected to the output end of the driving mechanism 8. A control shaft 22 is arranged above the control block 20. The radial outer wall of the control shaft 22 is slidably fitted with the radial inner wall of the control cylinder 17. A transmission pin 23 is fixedly installed on the radial outer wall of the control shaft 22. The outer wall of the control cylinder 17 is provided with a waist-shaped groove for the transmission pin 23 to slide. The control cylinder 17 can be connected to the output end of the driving mechanism 8 by bolts or can be integrally formed; the radial outer wall of the control shaft 22 slides in contact with the radial inner wall of the control cylinder 17, so that the control shaft 22 can move up and down relative to the control cylinder 17; a transmission pin 23 is fixedly installed on the radial outer wall of the control shaft 22, and the transmission pin 23 can be integrally formed with the control shaft 22. Two transmission pins 23 are provided, and the transmission pins 23 are arranged in a waist-shaped groove on the outer wall of the control cylinder 17; when the driving mechanism 8 vibrates up and down, it will drive the control cylinder 17 to vibrate up and down. Under the action of the waist-shaped groove, the transmission pin 23 will remain in its original position, thereby keeping the transmission shaft 18 in its original position, thereby avoiding the up and down movement of the cleaning brush 10.

[0037] In order to make the cleaning brush 10 fit the filter screen 14 better, further, see Figure 4-Figure 7 , the control shaft 22 is sleeved with a mounting bracket 9 on the outside, the mounting bracket 9 is fixedly connected to the air outlet box 1, the control block 20 is elastically connected to the mounting bracket 9, the bottom surface of the control block 20 is fixedly installed with a transmission pad 11, and the upper end of the transmission shaft 18 is fixedly installed with an anti-skid pad 19. Among them, the control shaft 22 and the mounting bracket 9 can be connected through a bearing; the mounting bracket is located below the transmission pin 23, and there is a gap between the control cylinder 17 and the mounting bracket 9, and a through hole is provided on the mounting bracket 9, and the control shaft 22 passes through the through hole; a spring is provided between the control block 20 and the mounting bracket 9, the upper end of the spring is fixedly connected to the lower surface of the mounting bracket, and the lower end of the spring is fixedly connected to the control block 20, so that the spring will give the control block 20 a downward force, so that the cleaning brush 10 fits the filter 14. When in use, the driving mechanism 8 drives the control cylinder 17 to rotate. Under the action of the waist groove and the transmission pin 23, the control cylinder 17 drives the control shaft 22 to rotate, and then drives the transmission shaft 18 below to rotate, and finally the cleaning brush 10 cleans the filter 14. Since the control block 20 and the transmission shaft 18 are magnetically connected, in order to prevent the control block 20 and the transmission shaft 18 from rotating relative to each other, a transmission pad 11 is fixedly installed on the bottom surface of the control block 20, and an anti-skid pad 19 is fixedly installed on the upper end of the transmission shaft 18. Both the transmission pad 11 and the anti-skid pad 19 can be rubber pads.

[0038] In order to reduce the noise generated by the vibration of the driving mechanism 8, further see Figure 1A shock absorber 5 is provided on the mounting plate 7 , one end of the shock absorber 5 is fixedly connected to the mounting plate 7 , and the other end of the shock absorber 5 is fixedly connected to the air outlet box 1 .

[0039] Among them, the shock absorber 5 is composed of a damper and a shock-absorbing spring, and is a product that can be purchased on the market. Its working principle will not be described in detail here. One end of the shock absorber 5 is fixedly connected to the mounting plate 7, and the other end of the shock absorber 5 is fixedly connected to the air outlet box 1. The driving mechanism 8 is fixedly mounted on the upper end surface of the mounting plate 7, and the mounting plate 7 provides an installation position for the driving mechanism 8. The setting of the shock absorber 5 can consume the energy generated by the working vibration of the driving mechanism 8 to achieve the effect of noise reduction.

[0040] In order to accurately understand the time to replace the filter 14, further refer to Figure 4-Figure 6 A connecting shaft 15 is elastically mounted on the upper end surface of the carrier plate 12, and one axial end of the connecting shaft 15 extends to the bottom surface of the carrier plate 12 and is detachably connected to the filter screen 14;

[0041] An information collection module 21 is disposed on the carrying plate 12 , and an alarm module 2 is disposed on the outer wall of the air outlet box 1 .

[0042] Among them, a through hole is provided on the bearing plate 12, and the connecting shaft 15 passes through the through hole and is bolted to the filter screen 14. The upper end of the connecting shaft 15 is sleeved with a spring, and the upper end of the spring is fixedly connected to the connecting shaft 15, and the lower end of the spring is fixedly connected to the information acquisition module 21. The bearing plate 12 is provided with an information acquisition module 21, and the information acquisition module 21 can collect the sliding information of the connecting shaft 15 or the pressure information of the connecting shaft 15 on the bearing plate 12; the outer wall of the air outlet box 1 is provided with an alarm module 2. With the use of the filter screen 14, the air pass rate of the filter screen 14 gradually decreases. At this time, air is supplied to the room, which will cause the filter screen 14 to move toward the exhaust duct 13, thereby driving the connecting shaft 15 to move downward. At this time, the information acquisition module 21 collects the sliding information of the connecting shaft 15 or the pressure information of the connecting shaft 15 on the bearing plate 12. When the information collected by the information acquisition module 21 exceeds the preset value, the alarm module 2 sends out an alarm.

[0043] For further information, see Figure 6 , the information acquisition module 21 includes a pressure sensor and an information transmission module, the pressure sensor is used to detect the pressure of the connecting shaft 15 on the upper end surface of the bearing plate 12;

[0044] The alarm module 2 includes an execution module and a logic controller;

[0045] The logic controller receives the pressure signal fed back by the pressure sensor through the information transmission module, and the logic controller controls the execution module to generate an alarm signal through the pressure signal.

[0046] Among them, the information acquisition module 21 includes a pressure sensor and an information transmission module, the pressure sensor is used to detect the pressure of the connecting shaft 15 on the upper end surface of the supporting plate 12, wherein the pressure sensor is fixedly installed on the supporting plate 12, and the spring on the outer wall of the connecting shaft 15 is connected to the pressure information acquisition end of the pressure sensor. When the air pass rate of the filter 14 decreases, the filter 14 and the connecting shaft 15 slide downward, and the pressure signal detected by the pressure sensor increases, so that the filter 14 can be replaced according to the pressure value detected by the pressure sensor.

[0047] The alarm module 2 includes an execution module and a logic controller. The execution module is a common buzzer, and the logic controller is a common single-chip microcomputer.

[0048] The logic controller receives the pressure signal fed back by the pressure sensor through the information transmission module. The logic controller controls the execution module to generate an alarm signal through the pressure signal. When the pressure signal reaches a value that requires replacement of the filter 14, the logic controller controls the buzzer to sound an alarm, so that the filter 14 can be replaced on time to prevent the filter 14 from still working after being blocked, thereby further saving energy for air supply.

[0049] For further information, see Figure 8 A connecting rod 24 is provided on the air outlet box 1, one end of the connecting rod 24 is hinged to the air outlet box 1, and a connecting sleeve 25 is rotatably installed on the other end of the connecting rod 24, and a mounting rod 26 is installed on the inner wall of the connecting sleeve 25 through internal and external thread matching.

[0050] The connecting rod 24 can be set on the top or side wall of the air outlet box 1. Preferably, four connecting rods 24 are provided, which are symmetrically distributed on both sides of the air outlet box 1. One end of the connecting rod 24 is hinged to the air outlet box 1, and the other end of the connecting rod 24 is rotatably installed with a connecting sleeve 25. The other end of the connecting rod 24 is rotatably installed with a connecting sleeve 25. The inner wall of the connecting sleeve 25 is provided with a thread, and the inner wall of the connecting sleeve 25 is installed with a mounting rod 26 through the internal and external threads. The mounting rod 26 is used to connect to the wall. Rotating the connecting sleeve 25 can adjust the angle of the air outlet box 1, thereby adjusting the air outlet angle according to actual usage requirements.

[0051] As a preference, see Figure 8The air inlet pipe 28 is connected to the air outlet box 1 through the bellows 27, and a bearing rod 29 is fixedly installed on the upper end surface of the air inlet pipe 28. The air inlet pipe 28 is connected to the wall through the bearing rod 29, the air inlet pipe 28 is connected to the output end of the heater, and the air inlet pipe 28 is connected to the air outlet box 1 through the bellows 27 to adapt to the angle adjustment of the air outlet box 1.

[0052] In order to guide the hot air discharged from the exhaust duct 13 so that the hot air can be blown more evenly into the room, further, see Figure 2 An air guide frame 3 is provided below the exhaust pipe 13, and the air guide frame 3 is fixedly connected to the air outlet box 1. The air guide frame 3 is connected to the air outlet box 1 by bolts, and the air guide frame 3 includes a rectangular frame, and a plurality of inclined air guide plates are provided inside the rectangular frame, so that the hot air discharged from the exhaust pipe 13 can be guided.

[0053] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ventilation and filtering structure for a heater, comprising an air inlet pipe (28) and an air outlet box (1) with an inner cavity, wherein the air inlet pipe (28) is connected to the inner cavity of the air outlet box (1), an exhaust pipe (13) connected to the inner cavity of the air outlet box (1) is arranged at the bottom of the air outlet box (1), and a filter screen (14) is arranged above the exhaust pipe (13), characterized in that: A cleaning mechanism is provided above the filter screen (14); The cleaning mechanism comprises a mounting plate (7), a transmission shaft (18), a cleaning brush (10) and a driving mechanism (8); the mounting plate (7) is arranged on the air outlet box (1); the driving mechanism (8) is arranged on the mounting plate (7); the output end of the driving mechanism (8) is connected to the transmission shaft (18) in a transmission manner; the cleaning brush (10) is fixedly connected to the lower end of the transmission shaft (18); the cleaning brush (10) abuts against the upper surface of the filter screen (14); one of the side walls of the air outlet box (1) is opened, and a closing plate (6) is detachably connected to the opening; a bearing plate (12) extending toward the inner cavity of the air outlet box (1) is arranged on the closing plate (6); the filter screen (14) is mounted on the bottom of the bearing plate (12); a mounting frame (16) is arranged above the bearing plate (12); the transmission shaft (18) is rotatably connected to the mounting frame (16); a control block (20) is arranged at the output end of the driving mechanism (8); 0), the control block (20) is magnetically connected to the transmission shaft (18); a control cylinder (17) is provided between the output end of the drive mechanism (8) and the control block (20), the control cylinder (17) is fixedly connected to the output end of the drive mechanism (8), a control shaft (22) is provided above the control block (20), the radial outer wall of the control shaft (22) is slidably fitted with the radial inner wall of the control cylinder (17), a transmission pin (23) is fixedly mounted on the radial outer wall of the control shaft (22), and a waist-shaped groove for sliding the transmission pin (23) is provided on the outer wall of the control cylinder (17); a mounting bracket (9) is sleeved on the outer side of the control shaft (22), the mounting bracket (9) is fixedly connected to the air outlet box (1), the control block (20) is elastically connected to the mounting bracket (9), a transmission pad (11) is fixedly mounted on the bottom surface of the control block (20), and an anti-slip pad (19) is fixedly mounted on the upper end of the transmission shaft (18).

2. The ventilation filter structure of the heater according to claim 1, characterized in that: A shock absorber (5) is provided on the mounting plate (7), one end of the shock absorber (5) is fixedly connected to the mounting plate (7), and the other end of the shock absorber (5) is fixedly connected to the air outlet box (1).

3. The ventilation filter structure of the heater according to claim 1, characterized in that: A connecting shaft (15) is elastically mounted on the upper end surface of the carrier plate (12), and one axial end of the connecting shaft (15) extends to the bottom surface of the carrier plate (12) and is detachably connected to the filter screen (14); An information collection module (21) is provided on the carrying plate (12), and an alarm module (2) is provided on the outer wall of the air outlet box (1).

4. The ventilation filter structure of the heater according to claim 3, characterized in that: The information acquisition module (21) comprises a pressure sensor and an information transmission module, wherein the pressure sensor is used to detect the pressure of the connecting shaft (15) on the upper end surface of the bearing plate (12); The alarm module (2) comprises an execution module and a logic controller; The logic controller receives the pressure signal fed back by the pressure sensor through the information transmission module, and the logic controller controls the execution module to generate an alarm signal through the pressure signal.

5. The ventilation filter structure of the heater according to claim 1, characterized in that: The air outlet box (1) is provided with a connecting rod (24), one end of the connecting rod (24) is hinged to the air outlet box (1), the other end of the connecting rod (24) is rotatably mounted with a connecting sleeve (25), and the inner wall of the connecting sleeve (25) is mounted with a mounting rod (26) through internal and external threaded engagement.

6. The ventilation filter structure of the heater according to claim 1, characterized in that: The air inlet pipe (28) is connected to the air outlet box (1) via a bellows (27), and a bearing rod (29) is fixedly mounted on the upper end surface of the air inlet pipe (28).

7. The ventilation filter structure of the heater according to claim 1, characterized in that: An air guide frame (3) is provided below the exhaust cylinder (13), and the air guide frame (3) is fixedly connected to the air outlet box (1).

Images