A backflow prevention air conditioning exhaust pipe

Abstract

This utility model provides an anti-backflow air conditioner exhaust pipe, relating to the field of exhaust pipe technology. It includes an intake pipe with a sealing mechanism at one end. The sealing mechanism includes a mounting housing, the lower end of which is fixedly connected to one end of the intake pipe. An annular sealing ring is fixedly installed on the inner bottom wall of the mounting housing, and symmetrically distributed slots are provided at the upper end of the mounting housing. The sealing mechanism utilizes gas pressure and a return spring to ensure that the sealing ball disengages from the annular sealing ring when gas is discharged and repositions to seal when there is no gas, effectively preventing odor backflow. The pressure regulating mechanism can adjust the pressure required for the sealing ball to disengage according to the gas pressure, adapting to different operating conditions. Furthermore, the components are easy to remove and clean as a whole, avoiding the influence of dust and impurities. This solves the problem that the built-in screw in traditional air conditioner exhaust pipes is easily affected by dust and moisture, leading to rotational jamming or even rust and seizure. It ensures long-term stable operation of the device and improves the anti-backflow effect and ease of use of the air conditioner exhaust.

Description

Technical Field

[0001] This utility model relates to the field of exhaust pipe technology, and in particular to an air conditioning exhaust pipe with backflow prevention. Background Technology

[0002] An air conditioning exhaust pipe is a pipe used in a central air conditioning system to discharge cool air from the room and hot air from the outside. The principle is to use the compressor in the central air conditioning system to compress the indoor air into high-temperature and high-pressure gas, and then discharge the gas to the outside through the exhaust pipe. Existing exhaust pipes do not have a backflow prevention function, which causes outdoor odor gases to flow into the room through the exhaust pipe, affecting the indoor air.

[0003] For example, a backflow prevention air conditioning exhaust pipe disclosed in Chinese patent literature (publication number: CN220303850U) uses a servo motor to drive the first bevel gear to rotate, causing the second bevel gears on both sides of the top of the first bevel gear to rotate accordingly. This allows both gears to rotate simultaneously, driving the rack plates on both sides to move up and down, which in turn drives the annular brush to move up and down on the outer wall of the exhaust pipe body for cleaning. At the same time, the rotation of the first bevel gear drives the screw to rotate, which allows the N-shaped frame to move up and down inside the exhaust pipe body. The limiting rod limits the N-shaped frame to prevent deflection. When it moves down to the top of the two exhaust pipes on both sides, the plug ball blocks the inside of the exhaust pipe to prevent gas backflow. This achieves the technical effect of cleaning and preventing backflow, thus improving the technical purpose of indoor air quality. It solves the problem in the background technology that the exterior of air conditioning exhaust pipes is easily adhered to by pollutants, which will produce odors after a long time without cleaning. Most exhaust pipes do not have a backflow prevention function, which causes odor gases to flow into the room and affect the indoor air quality.

[0004] However, the built-in screw design of this device has significant functional risks in actual use. The indoor air discharged by the central air conditioning system usually contains dust particles of 0.5-5μm. These dust particles mix with the moisture condensed by the cold air in the exhaust pipe to form sticky dirt. Since the screw is directly exposed in the airflow channel, the dirt will continue to adhere to the thread gaps. Every time the screw rotates, the friction between the threads will compact the dirt, forming a hard scale layer. After a period of time, obvious rotation jamming will occur. More seriously, the condensed water forms a closed water environment in the thread gaps, causing electrochemical corrosion on the screw surface. When rust and dirt mix, it is very easy to cause the screw and the N-shaped bracket to get stuck in the thread. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the problem that screws used in exhaust pipe backflow prevention are prone to corrosion and jamming, leading to backflow prevention sealing failure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An air conditioning exhaust pipe with backflow prevention includes an intake pipe, one end of which is provided with a sealing mechanism;

[0008] The sealing mechanism includes a mounting housing, the lower end of which is fixedly connected to one end of the air intake pipe. An annular sealing ring is fixedly installed on the inner bottom wall of the mounting housing. The upper end of the mounting housing has symmetrically distributed slots. Insert blocks are slidably inserted into the inner wall of the slots. A symmetrically distributed guide groove is provided at one end of each of the two insert blocks facing each other.

[0009] The mounting housing is equipped with a pressure regulating mechanism.

[0010] Preferably, the inner wall of the guide groove is slidably connected to a first guide slider, and a sealing ball is fixedly connected to one end of each of the two first guide sliders facing each other, with the outer side of the sealing ball contacting the upper end of the annular sealing ring.

[0011] Preferably, the front of the mounting housing is provided with an observation window, and the back of the mounting housing is fixedly connected to a discharge pipe.

[0012] Preferably, the pressure regulating mechanism includes a protective cover plate, the lower end of which is fixedly connected to the upper end of the mounting housing by bolts, and the upper ends of the two inserts are fixedly connected to the lower end of the protective cover plate.

[0013] Preferably, a pressure display is fixedly installed on the upper end of the protective cover, a hand-tightening screw is threadedly connected to the inner wall of the protective cover, the lower end of the hand-tightening screw extends into the interior of the mounting housing and is rotatably connected to a pressure regulating plate via a bearing, and a corrugated telescopic tube is fixedly connected to the upper end of the pressure regulating plate.

[0014] Preferably, the upper end of the corrugated telescopic tube is fixedly connected to the lower end of the protective cover plate, and the two sides of the pressure regulating plate are fixedly connected with symmetrically distributed second guide sliders. One end of the second guide slider is slidably connected to the inner wall of the guide groove, and a pressure sensor is fixedly installed at the lower end of the pressure regulating plate.

[0015] Preferably, a movable plate is fixedly installed at the lower end of the pressure sensor, and a return spring is fixedly connected to the lower end of the movable plate. One end of the return spring is fixedly connected to the outside of the sealing ball.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this invention, the sealing mechanism utilizes gas pressure and a return spring to ensure that the sealing ball disengages from the annular sealing ring when gas is discharged and returns to its original position when there is no gas, effectively preventing odor backflow. The pressure regulating mechanism can adjust the pressure required for the sealing ball to disengage according to the gas pressure, adapting to different working conditions. Furthermore, the components are easy to remove and clean as a whole, avoiding the influence of dust and impurities. This solves the problem that the built-in screw of the traditional air conditioner exhaust pipe is easily affected by dust and moisture, leading to rotational jamming or even rust and seizure. This ensures long-term stable operation of the device and improves the backflow prevention effect and ease of use of the air conditioner exhaust. Attached Figure Description

[0018] Figure 1 A schematic diagram of the main structure of an anti-backflow air conditioning exhaust pipe provided by this utility model;

[0019] Figure 2 A perspective view of a sealing ball structure for an air conditioning exhaust pipe designed to prevent backflow, provided by this utility model;

[0020] Figure 3 A perspective view of the mounting housing structure of an air conditioning exhaust pipe with backflow prevention provided by this utility model;

[0021] Figure 4 A perspective view of the insert structure of an air conditioner exhaust pipe with backflow prevention provided by this utility model;

[0022] Figure 5 An exploded view of the movable plate structure of an air conditioning exhaust pipe for preventing backflow, provided by this utility model.

[0023] Legend: 1. Intake pipe; 2. Mounting housing; 21. Annular sealing ring; 22. Slot; 23. Insert block; 24. Guide groove; 25. First guide slider; 26. Sealing ball; 27. Observation window; 28. Discharge pipe; 3. Protective cover plate; 31. Pressure indicator; 32. Hand screw; 33. Pressure regulating plate; 34. Corrugated telescopic tube; 35. Second guide slider; 36. Pressure sensor; 37. Movable plate; 38. Return spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Example

[0029] like Figures 1-5 As shown, this utility model provides a technical solution: an air conditioning exhaust pipe with backflow prevention, including an air inlet pipe 1. The air inlet pipe 1 serves as a channel for gas inflow, and a sealing mechanism is provided at one end of the pipe. The mounting housing 2 serves as the core mounting carrier, and the lower end of the mounting housing 2 is fixedly connected to one end of the air inlet pipe 1, providing space for gas inflow and subsequent processing.

[0030] The annular sealing ring 21, which is fixedly installed on the bottom wall of the housing 2, cooperates with the sealing ball 26 to perform a sealing function and prevent the backflow of external odor gases.

[0031] The symmetrically distributed slots 22 at the upper end of the mounting housing 2 and the sliding inserts 23 on the inner wall facilitate the installation and disassembly of components such as the protective cover 3, and make it easier to clean and maintain the interior of the mounting housing 2 in the future.

[0032] The guide grooves 24, which are symmetrically distributed at opposite ends of the two insert blocks 23, provide a track for the sliding of the first guide slider 25 and the second guide slider 35, ensuring that the movement of components such as the sealing pressure ball 26 and the pressure regulating plate 33 is more stable and precise.

[0033] The first guide slider 25, which is slidably connected to the inner wall of the guide groove 24, and the sealing ball 26, which is fixedly connected to one end of the guide slider 25, can move along the guide groove 24 under the action of gas pressure, so as to achieve separation and contact with the annular sealing ring 21.

[0034] When gas is discharged from the air inlet pipe 1 into the mounting housing 2, the gas pressure causes the sealing ball 26 to squeeze the return spring 38, thereby disengaging it from the annular sealing ring 21. The gas can then be discharged through the discharge pipe 28. When the gas pressure disappears, the elastic force of the return spring 38 drives the sealing ball 26 to reset and re-engage with the annular sealing ring 21, effectively preventing external odors from entering the air inlet pipe 1 and then seeping into the room, thus ensuring the cleanliness of the indoor air.

[0035] The observation window 27 on the front of the mounting housing 2 allows operators to easily observe the interior of the mounting housing 2, promptly identify problems such as dust and impurity accumulation, and carry out cleaning and maintenance. The exhaust pipe 28 fixedly connected to the back of the mounting housing 2 is the channel for gas exhaust, ensuring that the gas is smoothly discharged outdoors.

[0036] The pressure regulating mechanism inside the housing 2 is mainly composed of the protective cover plate 3. The lower end of the protective cover plate 3 is fixedly connected to the upper end of the housing 2 by bolts, which facilitates disassembly and assembly with tools. The upper ends of the two inserts 23 are fixedly connected to the lower end of the protective cover plate 3, realizing the linkage between the protective cover plate 3 and the inserts 23, which facilitates the overall disassembly and assembly.

[0037] The pressure display 31, which is fixedly installed on the upper end of the protective cover plate 3, can display the pressure value detected by the pressure sensor 36 in real time, so that the operator can intuitively understand the pressure inside the housing 2 and provide a basis for pressure adjustment.

[0038] The hand-tightening screw 32, which is threaded to the inner wall of the protective cover plate 3, can drive the pressure regulating plate 33 to move up and down inside the mounting housing 2 by rotating the hand-tightening screw 32. The lower end of the hand-tightening screw 32 extends into the mounting housing 2 and is rotatably connected to the pressure regulating plate 33 through a bearing. The second guide sliders 35, which are fixedly connected to both sides of the plate and are symmetrically distributed, are slidably connected to the inner wall of the guide groove 24 to ensure that the pressure regulating plate 33 remains stable during up and down movement and to avoid deviation.

[0039] The upper end of the pressure regulating plate 33 is fixedly connected to the corrugated expansion tube 34, and its upper end is fixedly connected to the lower end of the protective cover plate 3. When the pressure regulating plate 33 moves up and down, the corrugated expansion tube 34 can extend and retract accordingly, which plays a protective role in the space between the pressure regulating plate 33 and the protective cover plate 3, preventing dust and other impurities from entering and affecting the normal operation of the components.

[0040] The pressure sensor 36, which is fixedly installed at the lower end of the pressure regulating plate 33, can detect the pressure of the pressure regulating plate 33 on the reset spring 38 and transmit the pressure value to the pressure display 31 for display.

[0041] The pressure sensor 36 has a movable plate 37 fixedly installed at its lower end, and a reset spring 38 fixedly connected to its lower end, one end of which is fixedly connected to the outside of the sealing ball 26.

[0042] When the pressure regulating plate 33 moves up and down, it will squeeze or release the reset spring 38 through the pressure sensor 36 and the movable plate 37, thereby adjusting the elastic force of the reset spring 38.

[0043] In this way, the pressure required to disengage the sealing ball 26 from the annular sealing ring 21 can be adjusted according to actual needs, adapting to different air conditioning exhaust conditions and improving the applicability and flexibility of the device.

[0044] Meanwhile, since the main components of the entire pressure regulating mechanism and sealing mechanism can be easily removed as a whole by removing the protective cover plate 3, it is convenient to clean the internal components, avoid the long-term accumulation of dust and impurities affecting the normal operation of the device, and ensure the long-term stable operation of the device.

[0045] It should be noted that the electrical components mentioned above are all existing mature technologies. Appropriate models and power can be selected based on the technical knowledge of those skilled in the art, and they are controlled by PLC controllers, which are existing mature technologies. Therefore, they will not be described in detail again.

[0046] The working process of this utility model:

[0047] Step 1: When venting gas, the air inlet pipe 1 vents gas into the mounting housing 2. The gas pressure acts on the sealing ball 26, causing the sealing ball 26 to squeeze the return spring 38, thereby allowing the sealing ball 26 to disengage from the annular sealing ring 21. After the gas enters the mounting housing 2, it can be immediately discharged through the exhaust pipe 28. When the gas pressure disappears, the elastic force of the return spring 38 will drive the sealing ball 26 to reset and re-engage with the annular sealing ring 21, thereby preventing external odors from entering the air inlet pipe 1 and then seeping into the room, thus achieving the backflow prevention function.

[0048] Step two: During use, the pressure can be adjusted according to the discharged gas pressure. When the hand screw 32 is turned clockwise, the hand screw 32 will drive the pressure regulating plate 33 to descend. During the descent of the pressure regulating plate 33, the corrugated telescopic tube 34 will unfold synchronously for real-time protection, and the pressure sensor 36 will display the pressure value through the pressure display 31. At this time, the return spring 38 will be squeezed, which makes the air intake pipe 1 require a greater gas pressure to make the sealing ball 26 disengage from the annular sealing ring 21. Conversely, when the hand screw 32 is turned counterclockwise, the pressure regulating plate 33 rises, the degree of compression of the return spring 38 decreases, and the air intake pipe 1 only needs a smaller pressure to make the sealing ball 26 disengage from the annular sealing ring 21 to discharge gas. It can be flexibly adjusted according to actual usage needs.

[0049] Step 3: Through the observation window 27 on the front of the mounting housing 2, the inside of the mounting housing 2 can be observed. When a lot of dust and impurities are found inside, the screws fixing the protective cover 3 can be unscrewed to remove the protective cover 3, thereby removing the sealing pressure ball 26, the return spring 38 and other components inside for cleaning. The operation is very convenient and can effectively prevent the long-term accumulation of dust and impurities from affecting the normal operation of the device and ensure the long-term stable operation of the device.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air conditioning exhaust pipe with backflow prevention, comprising an intake pipe (1), characterized in that: A sealing mechanism is provided at one end of the air intake pipe (1); The sealing mechanism includes a mounting housing (2), the lower end of which is fixedly connected to one end of the air intake pipe (1), an annular sealing ring (21) is fixedly installed on the inner bottom wall of the mounting housing (2), and slots (22) are symmetrically distributed at the upper end of the mounting housing (2). Inserts (23) are slidably inserted into the inner wall of the slots (22), and guide grooves (24) are symmetrically distributed at the opposite ends of the two inserts (23). The mounting housing (2) is equipped with a pressure regulating mechanism inside.

2. The air conditioning exhaust pipe for preventing backflow according to claim 1, characterized in that: The inner wall of the guide groove (24) is slidably connected to a first guide slider (25), and a sealing ball (26) is fixedly connected to one end of each of the two first guide sliders (25). The outer side of the sealing ball (26) is in contact with the upper end of the annular sealing ring (21).

3. The backflow prevention air conditioning exhaust pipe according to claim 1, characterized in that: The front of the mounting housing (2) is provided with an observation window (27), and the back of the mounting housing (2) is fixedly connected with a discharge pipe (28).

4. The air conditioning exhaust pipe for preventing backflow according to claim 2, characterized in that: The pressure regulating mechanism includes a protective cover plate (3), the lower end of which is fixedly connected to the upper end of the mounting housing (2) by bolts, and the upper ends of the two inserts (23) are fixedly connected to the lower end of the protective cover plate (3).

5. The backflow prevention air conditioning exhaust pipe according to claim 4, characterized in that: A pressure display (31) is fixedly installed on the upper end of the protective cover (3). A hand screw (32) is threadedly connected to the inner wall of the protective cover (3). The lower end of the hand screw (32) extends into the interior of the mounting housing (2) and is rotatably connected to a pressure regulating plate (33) via a bearing. A corrugated telescopic tube (34) is fixedly connected to the upper end of the pressure regulating plate (33).

6. The backflow prevention air conditioning exhaust pipe according to claim 5, characterized in that: The upper end of the corrugated telescopic tube (34) is fixedly connected to the lower end of the protective cover plate (3). The two sides of the pressure regulating plate (33) are fixedly connected with second guide sliders (35) that are symmetrically distributed. One end of the second guide slider (35) is slidably connected to the inner wall of the guide groove (24). A pressure sensor (36) is fixedly installed at the lower end of the pressure regulating plate (33).

7. The backflow prevention air conditioning exhaust pipe according to claim 6, characterized in that: A movable plate (37) is fixedly installed at the lower end of the pressure sensor (36), and a reset spring (38) is fixedly connected at the lower end of the movable plate (37). One end of the reset spring (38) is fixedly connected to the outside of the sealing ball (26).

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