Exhaust pressure sensor for ventilation and air conditioning engineering

Abstract

The invention provides an exhaust pressure sensor for ventilation and air conditioning engineering, and relates to the technical field of pressure sensors, the exhaust pressure sensor comprises a sensor body, a contact is fixed at the front end of the sensor body, a plugging end is fixed at the rear end of the sensor body, a plug is plugged in a jack of the plugging end, and a connecting wire is fixed at the rear end of the plug. A mounting plate is arranged on the side face of the sensor body, a front-end cleaning assembly is arranged at the front end of the mounting plate, the front-end cleaning assembly comprises a circular ring, and compared with the prior art, the front-end cleaning assembly, the rear-end cleaning assembly and the sensor body are integrally mounted in an air conditioner ventilation system, and after the sensor is used for a period of time, the circular ring can be cleaned. The plug is separated from the plugging end, the interior of the plug and the interior of the jack are cleaned through the rear-end cleaning assembly, the contact end of the sensor body is synchronously cleaned through the front-end cleaning assembly, accumulated dust is wiped away, the detection precision is prevented from being affected, manual cleaning is replaced, the sensor does not need to be disassembled, and more convenience is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure sensors, in particular to an exhaust pressure sensor for ventilation and air-conditioning engineering. Background Art

[0002] Air conditioning pressure sensors precisely control the entire refrigeration system by measuring pressure changes. Common pressure sensors include physical and mechanical sensors, which convert pressure changes into electronic signals. Upon receiving these signals, the ECU (Engine Control Unit) or CPU (Main Control Unit) performs logical analysis and makes appropriate adjustments. When system pressure is abnormal, either too high or too low, the control system immediately shuts off power to the compressor to prevent damage caused by insufficient lubrication or abnormal pressure. Pressure sensors are considered intelligent sensors, intelligent sensing systems, and intelligent sensing components.

[0003] Because the exhaust pressure sensor needs to be installed inside the ventilation system of the air conditioner, the sensor's contacts need to be in direct contact with the air fluid. During this process, dust is easily accumulated on the contacts, resulting in impaired detection accuracy. At the same time, with long-term use of the sensor, dust is easily accumulated at the connection point with the connecting wire, which can easily cause damage to the circuit. Conventional technical methods involve disassembling the sensor and wiping it for cleaning, but this method is inconvenient for sensors installed in the ventilation system. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide an exhaust pressure sensor for ventilation and air-conditioning engineering to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure, and the front-end cleaning component and the rear-end cleaning component are installed integrally with the sensor body inside the air-conditioning and ventilation system. After using it for a period of time, the plug is separated from the plug end, and the plug and the inside of the socket are cleaned by the rear-end cleaning component. The contact end of the sensor body is cleaned synchronously by the front-end cleaning component to wipe off the accumulated dust to avoid affecting the detection accuracy. It replaces manual cleaning and does not require the sensor to be disassembled, which is more convenient.

[0005] In order to achieve the above-mentioned object, the present invention is realized through the following technical scheme: an exhaust pressure sensor for ventilation and air-conditioning engineering, comprising a sensor body, a contact fixed at the front end of the sensor body, and a plug end fixed at the rear end of the sensor body, a plug inserted in the socket of the plug end, and a connecting wire fixed at the rear end of the plug, a mounting plate is provided on the side of the sensor body, a front end cleaning assembly is provided at the front end of the mounting plate, the front end cleaning assembly comprises a ring, the ring is slidably sleeved on the surface of the sensor body at the rear end of the contact, a wiping ball is provided on one side of the ring, and the wiping ball is in sliding contact with the contact, a rear end cleaning assembly is provided at the rear end of the mounting plate, the rear end cleaning assembly comprises a rotating ring frame, the center of the rotating ring frame is coaxial with the plug and the socket of the plug end, two wiping rods are provided at the upper and lower ends of the rotating ring frame, the two wiping rods are respectively facing the socket and the plug, two movable plates are slidably installed on the outer surface of the mounting plate, and the movable plate at the rear end of the mounting plate is fixedly connected to the surface of the plug, and the movable plate at the front end of the mounting plate is slidably connected to the rear end of the ring.

[0006] Furthermore, a slide rail is fixed on the surface of the rear end of the mounting plate, and a limit frame is slidably sleeved on the surface of the slide rail, the connecting line slides through the limit frame, a first spring is fixed at the bottom of the limit frame, and the other end of the first spring is fixedly connected to the bottom of the slide rail.

[0007] Furthermore, the rear end cleaning assembly also includes a second screw, and the second screws are rotatably installed on both sides of the middle of the rotating ring frame through bearings, and an arc plate is threadedly sleeved on the surface of the second screw, and a vertical rod is fixed to the outer end of the wiping rod, and the other end of the vertical rod is installed on the arc plate.

[0008] Furthermore, the other end of the vertical rod is rotatably mounted on the end of the arc plate away from the second screw rod through a rotating shaft, a small motor is fixed on the outer side of the arc plate corresponding to the rotational mounting position of the vertical rod, and the output end of the small motor is fixedly connected to the vertical rod.

[0009] Furthermore, an inner gear ring is fixed on the inner wall of the rear end of the rotating ring frame, and a gear is meshed and connected to the outer side of the inner gear ring. A fixing plate is fixed to the position of the mounting plate corresponding to the rear end of the gear, and a driving motor is fixed on the surface of the fixing plate, and the output end of the driving motor is fixedly connected to the gear.

[0010] Furthermore, a connecting plate is fixed on the surface of the mounting plate at positions corresponding to the front and rear ends of the swivel frame, and a clamping frame is fixed on the outer end of the connecting plate, and the clamping frame is slidably sleeved on the surface of the swivel frame.

[0011] Furthermore, the front-end cleaning assembly also includes a telescopic connecting frame, the bottom of the circular ring is fixed with the telescopic connecting frame, and the other end of the telescopic connecting frame is fixedly connected to the front bottom of the rotating ring frame.

[0012] Furthermore, a side frame is fixed to the outside of the ring, and an electric telescopic plate is fixed to the outer surface of the side frame. The extended end of the electric telescopic plate is fixedly connected to the spring telescopic rod, and the extended end of the spring telescopic rod is fixedly connected to the wiping ball. The mounting plate is at a certain distance from the back of the side frame.

[0013] Furthermore, a fixing ring is fixed on the surface of the sensor body, and the fixing ring is fixed on the mounting plate. The movable plate slides through the fixing ring. A sliding groove is provided on the surface of the mounting plate, and a bidirectional screw is rotatably installed inside the sliding groove. Two movable plates are threadedly sleeved on both ends of the bidirectional screw.

[0014] Furthermore, a connecting block is fixed to the movable plate at the front end of the mounting plate, an annular groove is provided on the back side of the circular ring, and the connecting block slides along the inside of the annular groove.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, the connecting wire passes through the limit frame and is pushed upward by the first spring and the limit frame, and a certain length is reserved to meet the movement of the plug, so as to facilitate the cleaning of the plug and the inside of the plug end, and the movement of the plug will not pull the device at the other end of the connecting wire.

[0017] 2. According to the present invention, after the plug is away from the plug end, two second screws controlled by a small motor drive the arc plate to move. After moving to between the plug end and the plug, the small motor drives the vertical rod to rotate to a vertical shape. Then, through the drive of the second screw, the wiping rods are inserted into the interior of the socket and contact the inner wall of the socket. The other wiping rod is located on the surface of the plug. Driven by the drive motor, the gear engages with the inner gear ring to drive the rotating ring frame to rotate. The entire wiping rod rotates around the axis of the plug and the socket to clean the dust inside the plug end and on the surface of the plug. The small motor drives the vertical rod to rotate, which can make the wiping rod fold inward, and cooperate with the shape of the arc plate to avoid interference with the connection and separation of the plug and the plug end.

[0018] 3. The present invention is connected by a telescopic connecting frame. When the rotating ring frame rotates, it drives the circular ring to rotate. Because at this time the wiping ball is in contact with the contact surface, the contact surface is cleaned by the rotation and translation of the wiping ball to remove the accumulated dust. After the subsequent plug is reinserted into the plug end, the circular ring slides along the surface of the sensor body and is squeezed away from the contact position by the contraction ability of the spring telescopic rod and the spherical surface of the wiping ball.

[0019] 4. The present invention rotates the movable plate through the bidirectional screw and cooperates with the bidirectional screw thread to slide along the slide groove. The movable plate at the rear end is fixedly connected to the plug to pull the plug out of the jack of the plug end, and the plug is separated from the jack by a distance. The movable plate at the front end is slidably connected to the circular ring to push the circular ring forward, so that the spring telescopic rod extends and the wiping ball contacts the contact surface. Then, when the rotating ring frame rotates, the circular ring will also rotate synchronously through the fixed connection of the telescopic connecting frame. The wiping ball rotates along the contact surface to clean the dust on the contact surface. Because an annular groove is provided on the back of the circular ring, the connecting block can slide along the annular groove to maintain connection with the circular ring.

[0020] 5. Compared with the prior art, the present invention installs the front-end cleaning component and the rear-end cleaning component integrally with the sensor body inside the air-conditioning and ventilation system. After a period of use, the plug is separated from the plug end, and the plug and the inside of the socket are cleaned by the rear-end cleaning component. The contact end of the sensor body is cleaned synchronously by the front-end cleaning component to wipe off the accumulated dust and avoid affecting the detection accuracy. It replaces manual cleaning and does not require the sensor to be disassembled, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall front-end structure of an exhaust pressure sensor for ventilation and air-conditioning engineering according to the present invention;

[0022] Figure 2 This is a schematic diagram of the overall rear-end structure of an exhaust pressure sensor for ventilation and air-conditioning engineering according to the present invention;

[0023] Figure 3 This is a schematic structural diagram of a rear-end cleaning component of an exhaust pressure sensor for ventilation and air-conditioning engineering according to the present invention;

[0024] Figure 4 This is a schematic diagram of the driving structure of a rotating ring frame of an exhaust pressure sensor for ventilation and air conditioning engineering according to the present invention;

[0025] Figure 5 This is a schematic diagram of the connection between the rotating ring frame and the mounting plate of an exhaust pressure sensor for ventilation and air conditioning engineering of the present invention;

[0026] Figure 6 This is a schematic structural diagram of a front-end cleaning component of an exhaust pressure sensor for ventilation and air-conditioning engineering according to the present invention;

[0027] Figure 7 This is a schematic diagram of the connection between the ring and the mounting plate of an exhaust pressure sensor for ventilation and air conditioning engineering according to the present invention;

[0028] Figure 8 This is a schematic diagram of the connection between the circular ring and the rotating ring frame of an exhaust pressure sensor for ventilation and air-conditioning engineering of the present invention.

[0029] In the figure: 1. sensor body; 11. contact; 12. plug end; 13. fixing ring; 2. plug; 21. connecting wire; 3. mounting plate; 31. slide rail; 32. limit frame; 33. first spring; 34. slide groove; 35. bidirectional screw; 36. movable plate; 37. connecting block; 4. rear end cleaning assembly; 41. rotating ring frame; 42. second screw; 43. arc plate; 44. vertical rod; 45. small motor; 46. wiping rod; 47. fixing plate; 48. driving motor; 49. gear; 410. inner gear ring; 411. connecting plate; 412. card frame; 5. front end cleaning assembly; 51. circular ring; 52. telescopic connecting frame; 53. side frame; 54. spring telescopic rod; 55. wiping ball; 56. annular groove; 57. electric telescopic plate. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] See also Figures 1 to 8 The present invention provides a technical solution: an exhaust pressure sensor for ventilation and air-conditioning engineering, comprising a sensor body 1, a contact 11 being fixed at the front end of the sensor body 1, and a plug-in end 12 being fixed at the rear end of the sensor body 1, a plug 2 being inserted into the jack of the plug-in end 12, and a connecting line 21 being fixed to the rear end of the plug 2, a mounting plate 3 being provided on the side of the sensor body 1, a front end cleaning component 5 being provided at the front end of the mounting plate 3, the front end cleaning component 5 comprising a circular ring 51, the circular ring 51 being slidably sleeved on the surface of the sensor body 1 at the rear end of the contact 11, a wiping ball 55 being provided on one side of the circular ring 51, and the wiping ball 55 being in sliding contact with the contact 11, a rear end cleaning component 4 being provided at the rear end of the mounting plate 3, the rear end cleaning component 4 comprising a rotating ring frame 41, the rotating ring frame 41 The center of the circle is coaxial with the socket of the plug 2 and the plug end 12. Two wiping rods 46 are provided at the upper and lower ends of the rotating ring frame 41. The two wiping rods 46 face the socket and the plug 2 respectively. Two movable plates 36 are slidably installed on the outer surface of the mounting plate 3, and the movable plate 36 at the rear end of the mounting plate 3 is fixedly connected to the surface of the plug 2. The movable plate 36 at the front end of the mounting plate 3 is slidably connected to the rear end of the ring 51. When using the device, the mounting plate 3 is fixed to one side of the sensor body 1 and installed together inside the air-conditioning ventilation duct. The plug 2 is inserted into the plug end 12, and the wind pressure is detected through the contact 11. After a period of use, the plug 2, the plug end 12 and the contact 11 are wiped and cleaned by the front cleaning component 5 and the rear cleaning component 4 to remove the accumulated dust and maintain the accuracy of the detection of the sensor body 1.

[0032] In this embodiment, a slide rail 31 is fixed on the surface of the rear end of the mounting plate 3, and a limit frame 32 is slidably sleeved on the surface of the slide rail 31. The connecting line 21 slides through the limit frame 32. A first spring 33 is fixed to the bottom of the limit frame 32, and the other end of the first spring 33 is fixedly connected to the bottom of the slide rail 31. The connecting line 21 passes through the limit frame 32 and is pushed upward by the first spring 33 and the limit frame 32. A partial length is reserved to meet the movement of the plug 2, which is convenient for cleaning the inside of the plug 2 and the plug end 12, and the movement of the plug 2 will not pull the device at the other end of the connecting line 21.

[0033] The second screw 42 is rotatably mounted on both sides of the middle of the rotating ring frame 41 through bearings, and an arc plate 43 is threadedly sleeved on the surface of the second screw 42. The outer end of the wiping rod 46 is fixed with a vertical rod 44, and the other end of the vertical rod 44 is mounted on the arc plate 43. The other end of the vertical rod 44 is rotatably mounted on the arc plate 43 away from the second screw 42 through a rotating shaft. A small motor 45 is fixed on the outer side of the arc plate 43 at the rotation mounting position corresponding to the vertical rod 44, and the output end of the small motor 45 is fixedly connected to the vertical rod 44. An inner gear ring 410 is fixed on the inner wall of the rear end of the rotating ring frame 41, and a gear 49 is meshedly connected on the outer side of the inner gear ring 410. A fixing plate 47 is fixed on the position of the mounting plate 3 corresponding to the rear end of the gear 49, and a driving motor 48 is fixed on the surface of the fixing plate 47. The output end of the driving motor 48 is fixedly connected to the gear 49. 1 The front and rear ends of the connector are fixed with a connecting plate 411, and the outer end of the connecting plate 411 is fixed with a card frame 412. The card frame 412 is slidably sleeved on the surface of the rotating ring frame 41. After the plug 2 is away from the plug end 12, two second screws 42 controlled by small motors drive the arc plate 43 to move. After moving to between the plug end 12 and the plug 2, the small motor 45 drives the vertical rod 44 to rotate to a vertical shape. Then, through the drive of the second screw 42, the wiping rod 46 is inserted into the interior of the jack and the wiping rod 46 is inserted into the jack. The inner wall of the socket is in contact with the other wiping rod 46, and the wiping rod 46 is located on the surface of the plug 2. Driven by the driving motor 48, the gear 49 engages with the inner gear ring 410 to drive the rotating ring frame 41 to rotate. The entire wiping rod 46 rotates around the axis of the plug 2 and the socket to clean the dust inside the plug end 12 and the surface of the plug 2. The small motor 45 drives the vertical rod 44 to rotate, which can make the wiping rod 46 fold inward, and cooperate with the shape of the arc plate 43 to avoid interference with the connection and separation of the plug 2 and the plug end 12.

[0034] In this embodiment, the front cleaning component 5 also includes a telescopic connecting frame 52, a telescopic connecting frame 52 is fixed to the bottom of the circular ring 51, and the other end of the telescopic connecting frame 52 is fixedly connected to the front bottom of the rotating ring frame 41, and a side frame 53 is fixed to the outside of the circular ring 51. An electric telescopic plate 57 is fixed to the outer surface of the side frame 53, and the extended end of the electric telescopic plate 57 is fixedly connected to the spring telescopic rod 54, and the extended end of the spring telescopic rod 54 is fixedly connected to the wiping ball 55. The mounting plate 3 is at a certain distance from the back of the side frame 53. The electric telescopic plate 57 is actually a conventional telescopic plate and a structure with a built-in electric push rod, which can be adjusted The position of the wiping ball 55 is adjusted, and the swivel frame 41 drives the ring 51 to rotate when it rotates through the connection of the telescopic connecting frame 52. Because the wiping ball 55 is in contact with the surface of the contact 11 at this time, the surface of the contact 11 is cleaned by the rotation and translation of the wiping ball 55, and the accumulated dust is cleaned. After the subsequent plug 2 is reinserted into the plug end 12, the ring 51 slides along the surface of the sensor body 1 and is squeezed away from the position of the contact 11 by the contraction ability of the spring telescopic rod 54 and the spherical surface of the wiping ball 55. The telescopic connecting frame 52 consists of a long telescopic plate at the bottom and vertical plates at both ends, which can keep the ring 51 connected to the swivel frame 41 when it moves.

[0035] In this embodiment, a fixing ring 13 is fixed on the surface of the sensor body 1, and the fixing ring 13 is fixed on the mounting plate 3, the movable plate 36 slides through the fixing ring 13, a slide groove 34 is provided on the surface of the mounting plate 3, and a bidirectional screw 35 is rotatably installed inside the slide groove 34, and two ends of the bidirectional screw 35 are threadedly sleeved with two movable plates 36, and the movable plate 36 at the front end of the mounting plate 3 is fixed with a connecting block 37, and an annular groove 56 is provided on the back of the ring 51, and the connecting block 37 slides inside the annular groove 56, and a motor is built into the slide groove 34 to drive the bidirectional screw 35 to rotate, and the bidirectional screw 35 rotates the movable plate 36 and the bidirectional screw 35 threadedly cooperates along the slide groove 3 4 slides, the movable plate 36 at the rear end is fixedly connected with the plug 2, and the plug 2 is pulled out of the socket of the plug end 12, and the plug 2 is separated from the socket by a distance. The movable plate 36 at the front end is slidably connected with the ring 51, pushing the ring 51 forward, so that the spring telescopic rod 54 extends, and the wiping ball 55 contacts the surface of the contact 11. Then, when the swivel frame 41 rotates, the ring 51 will also rotate synchronously through the fixed connection of the telescopic connecting frame 52. The wiping ball 55 rotates along the surface of the contact 11 to clean the dust on the surface of the contact 11. Because the back of the ring 51 is provided with an annular groove 56, the connecting block 37 slides along the annular groove 56 to maintain the connection with the ring 51.

[0036] When using the device, fix the mounting plate 3 on one side of the sensor body 1 and install it together inside the air conditioning ventilation duct. Insert the plug 2 into the plug end 12 and detect the wind pressure through the contact 11. After using it for a period of time, wipe and clean the plug 2, the plug end 12 and the contact 11 through the front cleaning component 5 and the rear cleaning component 4 to remove the accumulated dust and maintain the accuracy of the detection of the sensor body 1. After the plug 2 is away from the plug end 12, the second screw 42 controlled by the two small motors drives the arc plate 43 to move. After moving to between the plug end 12 and the plug 2, the small motor 45 drives the vertical rod 44 to rotate. The second screw 42 is driven to vertically insert the wiping rod 46 into the inside of the jack and contact the inner wall of the jack. The other wiping rod 46 is located on the surface of the plug 2. The gear 49 is engaged with the inner gear ring 410 by the drive motor 48 to drive the rotating ring frame 41 to rotate. The entire wiping rod 46 rotates around the axis of the plug 2 and the jack to clean the dust inside the plug end 12 and the surface of the plug 2. The small motor 45 drives the vertical rod 44 to rotate, which can make the wiping rod 46 fold inward. The shape of the arc plate 43 can avoid interfering with the connection and separation of the plug 2 and the plug end 12. When the rotating ring frame 41 rotates, it drives the ring 51 to rotate, because at this time the wiping ball 55 is in contact with the surface of the contact 11, and then the surface of the contact 11 is cleaned by the rotation and translation of the wiping ball 55, and the accumulated dust is cleaned. After the subsequent plug 2 is reinserted into the plug end 12, the ring 51 slides along the surface of the sensor body 1, and is squeezed away from the position of the contact 11 by the contraction ability of the spring telescopic rod 54 and the spherical surface of the wiping ball 55. The bidirectional screw 35 rotates the moving plate 36 and the threaded engagement of the bidirectional screw 35 to slide along the slide groove 34, and the moving plate 36 at the rear end is fixedly connected to the plug 2. Then, pull the plug 2 out of the socket of the plug end 12 and separate the plug 2 from the socket by a distance. The movable plate 36 at the front end is connected to the circular ring 51 through a sliding connection, pushing the circular ring 51 forward, so that the spring telescopic rod 54 is extended, and the wiping ball 55 contacts the surface of the contact 11. Then, when the rotating ring frame 41 rotates, the circular ring 51 will also rotate synchronously through the fixed connection of the telescopic connecting frame 52. The wiping ball 55 rotates along the surface of the contact 11 to clean the dust on the surface of the contact 11. Because an annular groove 56 is provided on the back of the circular ring 51, the connecting block 37 slides along the annular groove 56 to maintain the connection with the circular ring 51.

[0037] The basic principles, main features and advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0038] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An exhaust pressure sensor for ventilation and air conditioning engineering, comprising a sensor body (1), characterized in that: The front end of the sensor body (1) is fixed with a contact (11), and the rear end of the sensor body (1) is fixed with a plug end (12), a plug (2) is plugged into the jack of the plug end (12), and a connecting line (21) is fixed to the rear end of the plug (2), a mounting plate (3) is provided on the side of the sensor body (1), a front end cleaning assembly (5) is provided at the front end of the mounting plate (3), and the front end cleaning assembly (5) includes a ring (51), the ring (51) is slidably sleeved on the surface of the sensor body (1) at the rear end of the contact (11), a wiping ball (55) is provided on one side of the ring (51), and the wiping ball (55) and the contact (11) are in contact with each other. ) sliding contact, a rear end cleaning assembly (4) is provided at the rear end of the mounting plate (3), the rear end cleaning assembly (4) comprises a rotating ring frame (41), the center of the rotating ring frame (41) is coaxial with the plug (2) and the socket of the plug end (12), two wiping rods (46) are provided at the upper and lower ends of the rotating ring frame (41), the two wiping rods (46) are respectively directed towards the socket and the plug (2), two movable plates (36) are slidably mounted on the outer surface of the mounting plate (3), and the movable plate (36) at the rear end of the mounting plate (3) is fixedly connected to the surface of the plug (2), and the movable plate (36) at the front end of the mounting plate (3) is slidably connected to the rear end of the ring (51).

2. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 1, characterized in that: A slide rail (31) is fixed on the surface of the rear end of the mounting plate (3), and a limiting frame (32) is slidably sleeved on the surface of the slide rail (31). The connecting line (21) slides through the limiting frame (32). A first spring (33) is fixed on the bottom of the limiting frame (32), and the other end of the first spring (33) is fixedly connected to the bottom of the slide rail (31).

3. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 1, characterized in that: The rear end cleaning assembly (4) further comprises a second screw (42), the second screws (42) being rotatably mounted on both sides of the middle portion of the rotating ring frame (41) via bearings, and an arc plate (43) being threadedly sleeved on the surface of the second screw (42), a vertical rod (44) being fixed to the outer end of the wiping rod (46), and the other end of the vertical rod (44) being mounted on the arc plate (43).

4. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 3, characterized in that: The other end of the vertical rod (44) is rotatably mounted on an end of the arc plate (43) away from the second screw rod (42) via a rotating shaft. A small motor (45) is fixed on the outer side of the arc plate (43) at a position corresponding to the rotational mounting position of the vertical rod (44), and the output end of the small motor (45) is fixedly connected to the vertical rod (44).

5. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 1, characterized in that: An inner gear ring (410) is fixed on the inner wall of the rear end of the rotating ring frame (41), and a gear (49) is meshedly connected to the outer side of the inner gear ring (410). A fixing plate (47) is fixed to the position of the mounting plate (3) corresponding to the rear end of the gear (49), and a driving motor (48) is fixed on the surface of the fixing plate (47), and the output end of the driving motor (48) is fixedly connected to the gear (49).

6. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 5, characterized in that: A connecting plate (411) is fixed on the surface of the mounting plate (3) at positions corresponding to the front and rear ends of the rotating ring frame (41), and a clamping frame (412) is fixed on the outer end of the connecting plate (411), and the clamping frame (412) is slidably sleeved on the surface of the rotating ring frame (41).

7. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 1, characterized in that: The front cleaning assembly (5) further comprises a telescopic connecting frame (52), the bottom of the circular ring (51) is fixed with the telescopic connecting frame (52), and the other end of the telescopic connecting frame (52) is fixedly connected to the front bottom of the rotating ring frame (41).

8. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 7, characterized in that: A side frame (53) is fixed to the outside of the circular ring (51), and an electric telescopic plate (57) is fixed to the outer surface of the side frame (53). The extended end of the electric telescopic plate (57) is fixedly connected to the spring telescopic rod (54), and the extended end of the spring telescopic rod (54) is fixedly connected to the wiping ball (55). The mounting plate (3) is at a certain distance from the back of the side frame (53).

9. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 8, characterized in that: A fixing ring (13) is fixed on the surface of the sensor body (1), and the fixing ring (13) is fixed on the mounting plate (3). The movable plate (36) slides through the fixing ring (13). A sliding groove (34) is provided on the surface of the mounting plate (3), and a bidirectional screw (35) is rotatably installed inside the sliding groove (34). Two ends of the bidirectional screw (35) are threadedly sleeved with two movable plates (36).

10. The exhaust pressure sensor for ventilation and air conditioning engineering according to claim 9, characterized in that: A connecting block (37) is fixed to the movable plate (36) at the front end of the mounting plate (3), an annular groove (56) is provided on the back of the circular ring (51), and the connecting block (37) slides inside the annular groove (56).

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