Maintenance opening for narrow space air outlet of heating ventilation and air conditioning

Abstract

The application discloses a narrow-space air outlet maintenance opening for a heating, ventilation and air conditioning system, belongs to the technical field of heat exchanger parts, and is characterized in that the maintenance opening is arranged at the bottom of a ceiling-embedded installation base, the ceiling-embedded installation base is internally provided with an embedded maintenance door, an embedded groove is arranged on the inner wall of the ceiling-embedded installation base, the embedded maintenance door is arranged on the inner wall of the embedded groove when the embedded maintenance door is in a closed state, the top corners of the embedded maintenance door are respectively fixed with a first fixing seat, a second fixing seat, a third fixing seat and a fourth fixing seat, a first rotating plate is rotatably connected to one side of the first fixing seat, a second rotating plate is rotatably connected to one side of the second fixing seat, a third rotating plate is rotatably connected to one side of the third fixing seat, a fourth rotating plate is rotatably connected to one side of the fourth fixing seat, a driving frame is arranged on the top of the embedded maintenance door, the first rotating plate and the second rotating plate are rotatably connected to one side of the driving frame, the third rotating plate and the fourth rotating plate are rotatably connected to the other side of the driving frame, and a rotating wheel is rotatably connected to one side of the fourth rotating plate.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger components, and in particular to inspection ports for air vents in confined spaces used in heating, ventilation, and air conditioning systems. Background Technology

[0002] HVAC vent access panels are an indispensable part of air conditioning systems. They are mainly used to facilitate routine maintenance, inspection, and cleaning of air conditioning ducts, vents, and other components.

[0003] For ceiling-recessed installations, the access panel is usually cleverly hidden inside the ceiling, flush with the ceiling surface, resulting in a clean and aesthetically pleasing appearance that does not disrupt the overall interior design. The ingeniously designed access door ensures both installation stability and easy disassembly. When maintenance is required, simply opening the access door allows direct access to the components inside the duct and vent, facilitating operation by staff, greatly improving maintenance efficiency, and ensuring the stable operation of the air conditioning system.

[0004] In the existing technology, the placement of access doors often faces a dilemma. If the access door is designed on the outside, although it is convenient to operate, it may compromise the overall airtightness, leading to leakage of hot and cold air, reducing the operating efficiency of the air conditioning system, increasing energy consumption, and potentially affecting indoor air quality. On the other hand, if the access door is placed inside, although it can better ensure airtightness, the narrow ceiling space brings great inconvenience to the maintenance work, making it difficult for staff to operate, resulting in low maintenance efficiency and easy damage to equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a maintenance access port for air vents in confined spaces for HVAC systems, in order to solve the dilemma that the location of maintenance doors in the prior art often faces. On the outside, although it is convenient to operate, it may compromise the overall airtightness. On the inside, although it can better ensure airtightness, the narrow ceiling space brings great inconvenience to maintenance work and makes it difficult for staff to operate.

[0006] This invention provides a maintenance access port for air vents in confined spaces used in HVAC systems. The access port is located at the bottom of a ceiling-mounted recessed mounting base. The ceiling-mounted recessed mounting base has an embedded access door inside. An embedded groove is formed in the inner wall of the ceiling-mounted recessed mounting base. When closed, the embedded access door is positioned within the inner wall of the embedded groove. Fixing seats one, two, three, and four are fixed to the top corners of the embedded access door. A rotating plate one is rotatably connected to one side of fixing seat one, a rotating plate two is rotatably connected to one side of fixing seat two, a rotating plate three is rotatably connected to one side of fixing seat three, and a rotating plate four is rotatably connected to one side of fixing seat four. A drive mechanism is provided at the top of the embedded access door. The drive frame has rotating plates one and two rotatably connected to one side, and rotating plates three and four rotatably connected to the other side. A rotating wheel is rotatably connected to one side of rotating plate four. A track seat is fixed to the inner wall of the ceiling-embedded mounting base. A sliding groove and a closed placement groove are provided on one side of the track seat. When the embedded maintenance door is closed, the rotating wheel is located on the inner wall of the closed placement groove. A support seat one is fixed to the inner wall of the ceiling-embedded mounting base. A transmission rod is rotatably connected to one side of the support seat one. A gear is fixed to the surface of the transmission rod. A rack is fixed to the top of the drive frame. The surface of the gear and the surface of the rack are fully meshed. The transmission rod is driven to rotate by a drive device.

[0007] Furthermore, the driving device includes a first pulley, which is fixed to one end of a transmission rod. A motor is fixed to the inner wall of the ceiling-embedded mounting base, and a second pulley is fixed to the driving end of the motor. A transmission belt is nested on the surface of the second pulley, and the transmission belt is nested on the surface of the first pulley. The diameter of the first pulley is larger than that of the second pulley. In the prior art, most maintenance doors rely on manual operation and lack an automated driving mechanism. Manual operation is inefficient, especially in scenarios with frequent maintenance or confined spaces. Workers need to spend a lot of time and energy to open and close the maintenance door, increasing labor intensity. The accuracy of manual operation is difficult to guarantee, and situations such as incomplete closure or incomplete opening are prone to occur, affecting the airtightness of the maintenance door, thereby reducing the operating efficiency of the air conditioning system and increasing energy consumption. The reliability of manual operation is low, and long-term use may lead to component wear or damage, increasing maintenance costs. To address these problems, this invention adopts a belt-driven automatic maintenance door driving device. In the driving device, the motor serves as the power source, and a second pulley is fixed to its driving end. When the motor starts, the second pulley rotates accordingly, driving the second pulley through the transmission belt. When the pulley rotates, because the diameter of the first pulley is larger than that of the second pulley, this design achieves a speed reduction and torque increase effect. This allows the transmission rod to rotate smoothly at a lower speed and with a greater torque. The rotation of the transmission rod further drives the connected maintenance door components, realizing the opening and closing operation of the maintenance door. This significantly improves operational efficiency, especially in scenarios with frequent maintenance or confined spaces, reducing the labor intensity and operation time of staff. The precise control of the motor ensures accurate opening and closing positions of the maintenance door, avoiding problems such as incomplete closure or incomplete opening, thereby ensuring the airtightness of the maintenance door, improving the operating efficiency of the air conditioning system, reducing energy consumption, and reducing wear caused by manual operation. This improves the reliability and service life of the system and reduces long-term maintenance costs.

[0008] Furthermore, guide rail devices are provided on both sides of the drive frame. Each guide rail device includes a sliding wheel. A pulley top seat is fixed on the top of both sides of the drive frame, and a pulley base is fixed on the bottom of both sides of the drive frame. The sliding wheel is rotatably connected to one side of the pulley top seat and the pulley base. A second support seat is fixed on the inner wall of the ceiling-embedded mounting base. A guide rail frame is fixed on one side of the second support seat. A guide rail groove is opened on the side of the guide rail frame near the sliding wheel, and the sliding wheel is located on the inner wall of the guide rail groove. In existing technologies, the movement of the drive frame typically lacks a guide rail structure. This results in the inability to precisely control the movement trajectory of the drive frame during the opening and closing of the access door. In such cases, the drive frame is prone to shaking, deviation, or even jamming, which not only affects the normal operation of the access door but may also lead to problems such as incomplete closure or incomplete opening, thereby affecting the airtightness and operating efficiency of the equipment. To address these issues, this invention employs a double-sided guide rail type drive frame guiding device. Guide rail devices are installed on both sides of the drive frame. These guide rail devices include sliding wheels. Pulley top seats and pulley bases are fixed to the top and bottom of both sides of the drive frame, respectively. The sliding wheels are rotatably connected to one side of the pulley top seats and pulley bases. The inner wall of the ceiling-mounted embedded base is fixed with a second support seat. A guide rail frame is fixed on one side of the second support seat. A guide rail groove is opened on the side of the guide rail frame near the sliding wheel. During the movement of the drive frame, the sliding wheel rolls along the guide rail groove, thereby providing precise guidance for the movement of the drive frame and ensuring its smooth and accurate movement. This effectively solves the problem of the lack of a guide rail structure for the movement of the drive frame in the existing technology. It ensures that the drive frame moves smoothly along a precise trajectory during the opening and closing of the maintenance door, avoiding shaking, deviation, and jamming. This not only improves the stability and reliability of the maintenance door operation, but also ensures the sealing when the maintenance door is closed and the positioning when it is opened, thereby improving the airtightness and operating efficiency of the equipment.

[0009] Furthermore, a component slot is provided on one side of the ceiling-embedded mounting base. A drive shaft is rotatably connected to the inner wall of the component slot. One end of the drive shaft is fixed to one side of a pulley, and the other end of the drive shaft is provided with an adjustment knob. The drive shaft is driven to rotate by the adjustment knob. In the prior art, the opening and closing of maintenance doors mostly rely on motor drives, which has obvious drawbacks in the event of power outages or other emergencies. In the event of a power outage, motor failure, or control system failure, the maintenance door cannot be opened by motor drive, which will lead to the inability to carry out emergency maintenance work in a timely manner, delaying the best time for equipment maintenance. Especially in some time-sensitive scenarios, such as hospitals and data centers, such delays may have serious consequences. To address this problem, the present invention adopts a manual emergency drive device. When manual operation of the maintenance door is required in an emergency, the operator drives the drive shaft to rotate by rotating the adjustment knob. One end of the drive shaft is fixed to one side of a pulley, so the rotation of the drive shaft will directly drive the pulley. The rotating pulley is connected to the drive rod, and its rotation directly drives the drive rod to rotate. The rotation of the drive rod further drives the connected maintenance door components, realizing the opening and closing of the maintenance door. This effectively solves the drawback of the existing technology where the maintenance door cannot be opened in the event of a power outage or other emergencies. In the event of a power outage, motor failure, or control system failure, the staff can quickly drive the drive shaft by manually rotating the adjustment knob, which in turn drives the pulley and the drive rod to open and close the maintenance door. This manual drive method is completely independent of the motor drive system, ensuring that the maintenance door can be operated quickly and reliably under any circumstances, thereby ensuring the timely implementation of emergency maintenance work and avoiding delays in the best time for equipment maintenance.

[0010] Furthermore, a sealing gasket is provided on the surface of the drive shaft, and a sealing fastener is threadedly connected to the inner wall of the first component groove. A sealing recess is provided on one side of the sealing fastener, and the sealing gasket is provided on the inner wall of the sealing recess. A second component groove is provided through one side of the sealing fastener, and the drive shaft rotates on the inner wall of the second component groove. An adjustment grip groove is provided on one side of the second component groove. In existing technologies, manual emergency drive devices typically lack sealing measures under normal operating conditions. This can lead to a breach in the airtightness between the access door and the mounting base, causing hot and cold air to leak through the gaps. Such leakage not only reduces the operating efficiency of the air conditioning system and increases energy consumption but may also introduce outside air, affecting indoor air quality. To address this issue, this invention employs a sealing structure. A sealing gasket is provided on the surface of the drive shaft, and this gasket is placed on the inner wall of the sealing groove of the sealing fastener. The sealing fastener is fixed to the inner wall of component slot one by a threaded connection, thereby firmly pressing the sealing gasket onto the surface of the drive shaft. When the drive shaft rotates, it rotates on the inner wall of component slot two, which is part of the sealing fastener. Component slot two also has an adjustment gripper groove on one side for manual operation, thus preventing the intrusion of external factors such as dust and moisture, significantly improving the overall airtightness, effectively preventing hot and cold air leakage through gaps, improving the operating efficiency of the air conditioning system, reducing energy consumption, and ensuring that indoor air quality is not affected, thereby improving the overall performance and reliability of the system.

[0011] Furthermore, a sealing groove is formed on the inner wall of the embedded groove, and a sealing ring is fixed to the bottom of the embedded access door. When the embedded access door is closed, the sealing ring is embedded in the inner wall of the sealing groove. By forming a sealing groove on the inner wall of the embedded groove and fixing a sealing ring to the bottom of the embedded access door, the sealing ring can be tightly embedded in the inner wall of the sealing groove when the access door is closed. This significantly improves the sealing performance between the access door and the mounting base, effectively preventing the leakage of hot and cold air through gaps, thereby ensuring the airtightness of the air conditioning system and improving the system's operating efficiency.

[0012] Furthermore, multiple gears are provided, each fixed to the surface of the transmission rod; multiple racks are provided, each fixed to the top of the drive frame; and the surfaces of the multiple gears and multiple racks mesh accordingly. By providing multiple gears on the surface of the transmission rod and multiple racks on the top of the drive frame, the meshing of multiple gears and multiple racks is achieved, significantly enhancing the stability and reliability of the transmission. This allows for a more even distribution of power, reducing the load on individual gears and racks, thereby reducing wear and extending the service life of the components.

[0013] Furthermore, a locking notch is provided at one end of the drive shaft, and a locking notch is provided at one end of the adjustment knob. When the driving end of the adjustment knob is located on the inner wall of the component slot two, locking notches one and two engage. A storage slot is provided on one side of the ceiling-mounted base, and a partition is slidably connected to the inner wall of the storage slot. A push-pull adjustment block is fixed to one side of the partition. By providing a locking notch one at one end of the drive shaft and a locking notch two at one end of the adjustment knob, it is ensured that the adjustment knob can be firmly engaged with the drive shaft during emergency operation, thereby realizing the manual drive function. Under normal circumstances, the adjustment knob can be removed from the drive shaft and placed in the storage slot on one side of the ceiling-mounted base. The inner wall of the storage slot is slidably connected to the partition, and the adjustment knob can be stored away by pushing and pulling the adjustment block, avoiding its impact on the aesthetics of the ceiling.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] Firstly, the present invention effectively solves the dilemma of the location of the maintenance door in the prior art by adopting a lifting-type embedded maintenance door structure. This structure places the maintenance door inside the ceiling-embedded mounting base, ensuring the airtightness of the air outlet and preventing the leakage of hot and cold air, thereby maintaining the high operating efficiency of the air conditioning system, reducing energy consumption, and ensuring indoor air quality. Through the unique lifting-type opening mechanism, the maintenance door can be raised and then moved to open when maintenance is required, overcoming the inconvenience of operation caused by the narrow ceiling space, enabling staff to carry out maintenance work more easily and efficiently, improving maintenance efficiency, and reducing the risk of equipment damage caused by difficult operation.

[0016] Secondly, the belt-driven automatic maintenance door drive device of this invention significantly improves operating efficiency, especially in scenarios with frequent maintenance or confined spaces. It reduces the labor intensity and operation time of staff. The precise control of the motor ensures the accurate opening and closing position of the maintenance door, avoiding problems such as incomplete closure or incomplete opening, thereby ensuring the airtightness of the maintenance door, improving the operating efficiency of the air conditioning system, reducing energy consumption, and reducing wear caused by manual operation. The automated drive reduces the reliability and service life of the system and reduces long-term maintenance costs.

[0017] Thirdly, the present invention adopts a double-sided guide rail type drive frame guiding device, which effectively solves the problem of lack of guide rail structure in the existing technology for drive frame movement. It ensures that the drive frame moves smoothly along a precise trajectory during the opening and closing of the maintenance door, avoiding shaking, deviation and jamming. This not only improves the stability and reliability of maintenance door operation, but also ensures the sealing when the maintenance door is closed and the positioning when it is opened, thereby improving the airtightness and operating efficiency of the equipment.

[0018] Fourth, the present invention employs a manual emergency drive device, which effectively solves the drawback of existing technologies where maintenance doors cannot be opened in the event of power failure or other emergencies. In the event of a power outage, motor failure, or control system failure, staff can quickly drive the transmission shaft by manually rotating the adjustment knob, which in turn drives the pulley and transmission rod to open and close the maintenance door. This manual drive method is completely independent of the motor drive system, ensuring that the maintenance door can be operated quickly and reliably under any circumstances, thereby ensuring the timely implementation of emergency maintenance work and avoiding delays in the best time for equipment maintenance.

[0019] Fifth, the invention employs a sealed structure to prevent the intrusion of external factors such as dust and moisture, significantly improving the overall airtightness, effectively preventing the leakage of hot and cold air through gaps, improving the operating efficiency of the air conditioning system, reducing energy consumption, and ensuring that indoor air quality is not affected, thereby improving the overall performance and reliability of the system. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is an exploded view of the lifting embedded access door of the present invention;

[0023] Figure 3 This is a three-dimensional structural diagram of the embedded access door of the present invention;

[0024] Figure 4 This is a three-dimensional structural diagram of the lifting embedded inspection door structure of the present invention;

[0025] Figure 5 This is a three-dimensional structural diagram of the belt-driven automatic maintenance door drive device of the present invention;

[0026] Figure 6 This is a three-dimensional structural diagram of the track base of the present invention;

[0027] Figure 7 This is a three-dimensional structural diagram of the transmission shaft of the manual emergency drive device of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the adjustment knob of the present invention;

[0029] Figure 9This is an exploded view of the sealing structure of the present invention;

[0030] Figure 10 This is a three-dimensional structural diagram of the sealing and fixing component of the present invention;

[0031] Figure 11 for Figure 2 Enlarged view of point A in the middle;

[0032] Figure 12 for Figure 9 Enlarged view of point B in the middle.

[0033] Figure label:

[0034] 1. Inspection port; 101. Ceiling-mounted recessed mounting base; 102. Recessed groove; 103. Recessed inspection door; 104. Fixed seat one; 105. Fixed seat two; 106. Fixed seat three; 107. Fixed seat four; 108. Rotating plate one; 109. Rotating plate two; 110. Rotating plate three; 111. Rotating plate four; 112. Drive frame; 113. Rotating wheel; 114. Track seat; 115. Sliding groove; 116. Closed placement groove; 117. Support seat one; 118. Transmission rod; 119. Gear; 120. Rack; 121. Pulley top seat; 12 2. Pulley base; 123. Pulley; 124. Support base two; 125. Guide rail frame; 126. Guide rail groove; 2. Sealing ring; 201. Sealing groove; 3. Belt pulley one; 301. Motor; 302. Belt pulley two; 303. Transmission belt; 4. Component groove one; 401. Transmission shaft; 402. Adjustment knob; 5. Sealing gasket; 501. Sealing fastener; 502. Sealing embedded groove; 503. Component groove two; 504. Adjustment grip groove; 6. Locking notch one; 601. Locking notch two; 7. Storage groove; 701. Partition; 702. Push-pull adjustment block. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0037] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, 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 limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Specific Implementation

[0040] The following is combined with Figures 1 to 12As shown, this embodiment of the invention provides a maintenance access port for air vents in confined spaces used in HVAC systems. The maintenance access port 1 is located at the bottom of a ceiling-mounted recessed mounting base 101. An embedded maintenance door 103 is provided inside the ceiling-mounted recessed mounting base 101. An embedded groove 102 is formed on the inner wall of the ceiling-mounted recessed mounting base 101. When the embedded maintenance door 103 is closed, it is positioned within the inner wall of the embedded groove 102. Fixing seats 1-104, 105, 106, and 107 are fixed to the top corners of the embedded maintenance door 103. A rotating plate 108 is rotatably connected to one side of fixing seat 104; a rotating plate 109 is rotatably connected to one side of fixing seat 205; a rotating plate 110 is rotatably connected to one side of fixing seat 306; and a rotating plate 111 is rotatably connected to one side of fixing seat 407. A drive frame 1 is provided at the top of the embedded maintenance door 103. 12. Rotating plate 108 and rotating plate 2 109 are rotatably connected to one side of the drive frame 112, rotating plate 3 110 and rotating plate 4 111 are rotatably connected to the other side of the drive frame 112. Rotating plate 4 111 is rotatably connected to a rotating wheel 113 on one side. The inner wall of the ceiling-embedded mounting base 101 is fixed with a track seat 114. The track seat 114 is provided with a sliding groove 115 and a closed placement groove 116 on one side. When the embedded maintenance door 103 is in the closed state, the rotating wheel 113 is located on the inner wall of the closed placement groove 116. The inner wall of the ceiling-embedded mounting base 101 is fixed with a support seat 117. The support seat 117 is rotatably connected to a transmission rod 118 on one side. The surface of the transmission rod 118 is fixed with a gear 119. The top of the drive frame 112 is fixed with a rack 120. The surface of the gear 119 is fully meshed with the surface of the rack 120. The transmission rod 118 is driven to rotate by a drive device. In existing technologies, the placement of access doors often faces a dilemma. While placing the access door on the outside facilitates operation, it may compromise overall airtightness, leading to leaks of hot and cold air, reducing the efficiency of the air conditioning system, increasing energy consumption, and potentially affecting indoor air quality. Conversely, placing the access door inside, while ensuring better airtightness, presents significant inconvenience due to limited ceiling space, making operation difficult for staff, reducing maintenance efficiency, and increasing the risk of equipment damage. To address these issues, this invention employs a lift-type embedded access door structure. When the access door needs to be opened, the drive... The drive device drives the transmission rod 118 to rotate, and the gear 119 on the transmission rod 118 rotates accordingly. The rack 120, which is fully meshed with the gear, drives the drive frame 112 to move to one side. The rotating plates 108, 109, 110 and 111 fixed on both sides of the drive frame 112 begin to rotate, causing the embedded maintenance door 103 to gradually rise from the closed state. When the embedded maintenance door 103 rises to a certain height, the rotating wheel 113 moves out from the inner wall of the closed placement groove 116 and enters the sliding groove 115, moving along the sliding groove 115, thereby realizing the opening operation of the maintenance door.

[0041] Specifically, the driving device includes a pulley 3, which is fixed to one end of a transmission rod 118. A motor 301 is fixed to the inner wall of a ceiling-embedded mounting base 101. A pulley 302 is fixed to the driving end of the motor 301. A transmission belt 303 is nested on the surface of pulley 302, and the transmission belt 303 is nested on the surface of pulley 3. The diameter of pulley 3 is larger than that of pulley 302. In the prior art, most maintenance doors rely on manual operation and lack an automated driving mechanism. Manual operation is inefficient, especially in scenarios with frequent maintenance or confined spaces. Workers need to spend a lot of time and energy to open and close the maintenance door, increasing labor intensity. The accuracy of manual operation is difficult to guarantee, and situations such as incomplete closure or incomplete opening are prone to occur, affecting the airtightness of the maintenance door, thereby reducing the operating efficiency of the air conditioning system and increasing energy consumption. The reliability of manual operation is low, and long-term use may lead to component wear or damage, increasing maintenance costs. To address these problems, this invention... An automatic maintenance door drive device with belt drive is adopted. In the drive device, motor 301 serves as the power source, and pulley 302 is fixed at its drive end. When motor 301 starts, pulley 302 rotates accordingly, driving pulley 3 to rotate through transmission belt 303. Since the diameter of pulley 3 is larger than that of pulley 302, this design achieves the effect of speed reduction and torque increase, enabling transmission rod 118 to rotate smoothly at a lower speed and with greater torque. The rotation of transmission rod 118 further drives the maintenance door component connected to it, realizing the opening and closing operation of the maintenance door.

[0042] Specifically, both sides of the drive frame 112 are provided with guide rail devices, each including a sliding wheel 123. Both sides of the drive frame 112 are fixed with a pulley top seat 121, and both sides of the drive frame 112 are fixed with a pulley base 122. The sliding wheel 123 is rotatably connected to one side of the pulley top seat 121 and the pulley base 122. The inner wall of the ceiling-embedded mounting base 101 is fixed with a support seat 2 124. A guide rail frame 125 is fixed to one side of the support seat 2 124. A guide rail groove 126 is opened on the side of the guide rail frame 125 near the sliding wheel 123, and the sliding wheel 123 is located on the inner wall of the guide rail groove 126. In existing technologies, the movement of the drive frame typically lacks a guide rail structure. This results in the inability to precisely control the movement trajectory of the drive frame during the opening and closing of the maintenance door. In such cases, the drive frame is prone to shaking, deviation, or even jamming, which not only affects the normal operation of the maintenance door but may also lead to problems such as incomplete closure or incomplete opening, thereby affecting the airtightness and operating efficiency of the equipment. To address these issues, this invention employs a double-sided guide rail type drive frame guiding device. Guide rail devices are installed on both sides of the drive frame 112, and these guide rail devices include sliding wheels 123. The top and bottom sides are respectively fixed with pulley top seat 121 and pulley base 122. The pulley 123 is rotatably connected to one side of the pulley top seat 121 and pulley base 122. The inner wall of the ceiling embedded mounting base 101 is fixed with support seat 2 124. A guide rail frame 125 is fixed on one side of support seat 2 124. A guide rail groove 126 is opened on the side of the guide rail frame 125 near the pulley 123. During the movement of the drive frame 112, the pulley 123 rolls along the guide rail groove 126, thereby providing precise guidance for the movement of the drive frame 112 and ensuring its smooth and accurate movement.

[0043] Specifically, a component groove 4 is provided on one side of the recessed mounting base 101 in the ceiling. A drive shaft 401 is rotatably connected to the inner wall of the component groove 4. One end of the drive shaft 401 is fixed to one side of the pulley 3, and the other end of the drive shaft 401 is provided with an adjustment knob 402. The drive shaft 401 is driven to rotate by the adjustment knob 402. In existing technologies, the opening and closing of maintenance doors mostly rely on motor drives, which has significant drawbacks in the event of power outages or other emergencies. When there is a power outage, motor failure, or control system malfunction, the maintenance door cannot be opened by motor drive, leading to delays in emergency repairs and missed opportunities for optimal equipment maintenance. This delay can have serious consequences, especially in time-sensitive scenarios such as hospitals and data centers. To address this issue, this invention employs a manual emergency drive device. When manual operation of the maintenance door is required in an emergency, the operator rotates the adjustment knob 402 to drive the transmission shaft 401. One end of the transmission shaft 401 is fixed to one side of the pulley 3, so the rotation of the transmission shaft 401 directly drives the pulley 3 to rotate. The pulley 3 is connected to the transmission rod 118, and its rotation directly drives the transmission rod 118 to rotate. The rotation of the transmission rod 118 further drives the connected maintenance door components, thus opening and closing the maintenance door.

[0044] Specifically, the drive shaft 401 has a sealing gasket 5 on its surface, and a sealing fastener 501 is threadedly connected to the inner wall of component groove 1 4. A sealing recess 502 is opened on one side of the sealing fastener 501, and the sealing gasket 5 is located on the inner wall of the sealing recess 502. A component groove 2 503 is opened through one side of the sealing fastener 501, and the drive shaft 401 rotates on the inner wall of component groove 2 503. An adjustment gripping groove 504 is opened on one side of component groove 2 503. In the prior art, manual emergency drive devices typically lack sealing measures under normal operating conditions. This can lead to a breach in the airtightness between the access door and the mounting base, causing hot and cold air to leak through the gaps. Such leakage not only reduces the operating efficiency of the air conditioning system and increases energy consumption, but may also introduce outside air, affecting indoor air quality. To address this issue, the present invention employs a sealing structure. A sealing gasket 5 is provided on the surface of the drive shaft 401. The sealing gasket 5 is placed on the inner wall of the sealing groove 502 of the sealing fastener 501. The sealing fastener 501 is fixed to the inner wall of the component groove 4 by a threaded connection, thereby firmly pressing the sealing gasket 5 onto the surface of the drive shaft 401. When the drive shaft 401 rotates, it rotates on the inner wall of the component groove 503, which is part of the sealing fastener 501. An adjustment grip groove 504 is also provided on one side of the component groove 503 for manual operation.

[0045] Specifically, a sealing groove 201 is formed on the inner wall of the recessed groove 102, and a sealing ring 2 is fixed at the bottom of the recessed access door 103. When the recessed access door 103 is closed, the sealing ring 2 is embedded in the inner wall of the sealing groove 201. By forming a sealing groove 201 on the inner wall of the recessed groove 102 and fixing the sealing ring 2 at the bottom of the recessed access door 103, the sealing ring 2 can be tightly embedded in the inner wall of the sealing groove 201 when the access door is closed. This significantly improves the sealing performance between the access door and the mounting base, effectively preventing the leakage of hot and cold air through gaps, thereby ensuring... The airtightness of the air conditioning system improves its operating efficiency. Multiple gears 119 are provided, each fixed to the surface of the transmission rod 118. Multiple racks 120 are provided, each fixed to the top of the drive frame 112. The surfaces of the gears 119 and racks 120 mesh correspondingly. By providing multiple gears 119 on the surface of the transmission rod 118 and multiple racks 120 on the top of the drive frame 112, the meshing of the gears 119 and racks 120 is significantly enhanced, greatly improving the stability and reliability of the transmission. Evenly distributing transmission power reduces the load on individual gears and racks, thereby reducing wear and extending the service life of components. One end of the drive shaft 401 has a locking notch 6, and one end of the adjusting knob 402 has a locking notch 601. When the driving end of the adjusting knob 402 is located on the inner wall of the component slot 503, locking notches 6 and 601 engage. A storage groove 7 is provided on one side of the ceiling-mounted recessed mounting base 101. A partition 701 is slidably connected to the inner wall of the storage groove 7, and a push-pull adjusting block 702 is fixed to one side of the partition 701. Through the drive shaft 401 at one end... A locking notch 6 is provided, and a locking notch 601 is provided at one end of the adjusting knob 402. This ensures that the adjusting knob 402 can be firmly engaged with the drive shaft 401 during emergency operation, thereby realizing the manual drive function. Under normal circumstances, the adjusting knob 402 can be removed from the drive shaft 401 and placed in the storage groove 7 on one side of the ceiling recessed mounting base 101. The inner wall of the storage groove 7 is slidably connected to a partition 701, and the adjusting knob 402 can be stored away by pushing and pulling the adjusting block 702, thus avoiding its impact on the aesthetics of the ceiling.

[0046] Working principle of the invention:

[0047] In this invention, when the maintenance door needs to be opened, the drive device drives the transmission rod 118 to rotate, and the gear 119 on the transmission rod 118 rotates accordingly. The rack 120, which is fully meshed with the gear, drives the drive frame 112 to move to one side. The rotating plates 108, 109, 110, and 111 fixed on both sides of the drive frame 112 begin to rotate, causing the embedded maintenance door 103 to gradually rise from the closed state. After the embedded maintenance door 103 has risen to a certain height, the rotating wheel 113 moves out from the inner wall of the closed placement groove 116 and enters the sliding groove 115, moving along the sliding groove 115, thereby realizing the opening operation of the maintenance door. In the drive device, the motor 301 serves as the power source, and its drive end is fixed. A second pulley 302 is fixed. When the motor 301 starts, the second pulley 302 rotates accordingly, driving the first pulley 3 to rotate via the transmission belt 303. Since the diameter of the first pulley 3 is larger than that of the second pulley 302, this design achieves the effect of speed reduction and torque increase, allowing the transmission rod 118 to rotate smoothly at a lower speed and with a larger torque. The rotation of the transmission rod 118 further drives the connected maintenance door component, realizing the opening and closing operation of the maintenance door. Guide rail devices are installed on both sides of the drive frame 112. These guide rail devices include sliding wheels 123. Pulley top seats 121 and pulley bases 122 are fixed on the top and bottom of both sides of the drive frame 112, respectively. The sliding wheels 123 are rotatably connected to the pulley. On one side of the top seat 121 and the pulley base 122, a support seat 2 124 is fixed to the inner wall of the ceiling-embedded mounting base 101. A guide rail frame 125 is fixed to one side of the support seat 2 124. A guide rail groove 126 is opened on the side of the guide rail frame 125 near the sliding wheel 123. During the movement of the drive frame 112, the sliding wheel 123 rolls along the guide rail groove 126, thereby providing precise guidance for the movement of the drive frame 112 and ensuring its smooth and accurate movement. When the maintenance door needs to be manually operated in an emergency, the operator drives the drive shaft 401 to rotate by turning the adjustment knob 402. One end of the drive shaft 401 is fixed to one side of the pulley 3. Therefore, the rotation of the drive shaft 401 will directly drive the belt. When pulley 3 rotates, it connects to the transmission rod 118. The rotation of pulley 3 directly drives the transmission rod 118 to rotate. The rotation of the transmission rod 118 further drives the maintenance door component connected to it, realizing the opening and closing of the maintenance door. The surface of the transmission shaft 401 is provided with a sealing gasket 5. The sealing gasket 5 is placed in the inner wall of the sealing groove 502 of the sealing fastener 501. The sealing fastener 501 is fixed to the inner wall of the component groove 4 by a threaded connection, thereby firmly pressing the sealing gasket 5 onto the surface of the transmission shaft 401. When the transmission shaft 401 rotates, it rotates in the inner wall of the component groove 503, which is part of the sealing fastener 501. An adjustment grip groove 504 is also provided on one side for manual operation.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A maintenance access port for air vents in confined spaces for HVAC systems, wherein the maintenance access port (1) is located at the bottom of a recessed mounting base (101) in the ceiling, characterized in that: The recessed ceiling mounting base (101) is equipped with a recessed access door (103). The inner wall of the recessed ceiling mounting base (101) is provided with an embedded groove (102). When the recessed access door (103) is in the closed state, it is located on the inner wall of the embedded groove (102). The top corners of the recessed access door (103) are respectively fixed with a fixing seat one (104), a fixing seat two (105), a fixing seat three (106), and a fixing seat four (107). One (104) has a rotating plate one (108) rotatably connected to one side; the second (105) has a rotating plate two (109) rotatably connected to one side; the third (106) has a rotating plate three (110) rotatably connected to one side; the fourth (107) has a rotating plate four (111) rotatably connected to one side; the top of the embedded inspection door (103) is provided with a drive frame (112); the first (108) and the second (109) rotating plates are rotatably connected to the drive frame (112). 12) On one side, the rotating plate three (110) and rotating plate four (111) are rotatably connected to the other side of the drive frame (112). A rotating wheel (113) is rotatably connected to one side of the rotating plate four (111). A track seat (114) is fixed to the inner wall of the ceiling-mounted embedded mounting base (101). A sliding groove (115) and a closed placement groove (116) are provided on one side of the track seat (114). When the embedded inspection door (103) is in the closed state, the rotating wheel (113) is located on the... The inner wall of the closed placement slot (116) is fixed with a support base (117) on the inner wall of the ceiling embedded mounting base (101). A transmission rod (118) is rotatably connected to one side of the support base (117). A gear (119) is fixed on the surface of the transmission rod (118). A rack (120) is fixed on the top of the drive frame (112). The surface of the gear (119) is fully engaged with the surface of the rack (120). The transmission rod (118) is driven to rotate by a drive device.

2. The inspection port according to claim 1, characterized in that: The driving device includes a pulley (3), which is fixed to one end of a transmission rod (118). A motor (301) is fixed to the inner wall of the ceiling-mounted base (101). A pulley (302) is fixed to the driving end of the motor (301). A transmission belt (303) is nested on the surface of the pulley (302). The transmission belt (303) is nested on the surface of the pulley (3). The diameter of the pulley (3) is larger than that of the pulley (302).

3. The inspection port according to claim 1, characterized in that: The drive frame (112) is provided with guide rail devices on both sides. The guide rail devices include sliding wheels (123). The top of both sides of the drive frame (112) is fixed with a pulley top seat (121). The bottom of both sides of the drive frame (112) is fixed with a pulley base (122). The sliding wheel (123) is rotatably connected to one side of the pulley top seat (121) and the pulley base (122). The inner wall of the ceiling embedded mounting base (101) is fixed with a support seat two (124). The support seat two (124) is fixed with a guide rail frame (125) on one side. The guide rail frame (125) has a guide rail groove (126) on the side near the sliding wheel (123). The sliding wheel (123) is located on the inner wall of the guide rail groove (126).

4. The inspection port according to claim 2, characterized in that: The ceiling-mounted recessed mounting base (101) has a component groove (4) on one side. The inner wall of the component groove (4) is rotatably connected to a drive shaft (401). One end of the drive shaft (401) is fixed to one side of a pulley (3), and the other end of the drive shaft (401) is provided with an adjustment knob (402). The drive shaft (401) is driven to rotate by the adjustment knob (402).

5. The inspection port according to claim 4, characterized in that: The drive shaft (401) is provided with a sealing gasket (5) on its surface. The inner wall of the first component groove (4) is threaded with a sealing fastener (501). A sealing groove (502) is provided on one side of the sealing fastener (501). The sealing gasket (5) is provided on the inner wall of the sealing groove (502). A second component groove (503) is provided through one side of the sealing fastener (501). The drive shaft (401) rotates on the inner wall of the second component groove (503). An adjustment gripping groove (504) is provided on one side of the second component groove (503).

6. The inspection port according to claim 1, characterized in that: The inner wall of the embedded groove (102) is provided with a sealing groove (201), and a sealing ring (2) is fixed at the bottom of the embedded inspection door (103). When the embedded inspection door (103) is in the closed state, the sealing ring (2) is embedded in the inner wall of the sealing groove (201).

7. The inspection port according to claim 1, characterized in that: Multiple gears (119) are provided, and all of the multiple gears (119) are fixed to the surface of the transmission rod (118). Multiple racks (120) are provided, and all of the multiple racks (120) are fixed to the top of the drive frame (112). The surfaces of the multiple gears (119) and the multiple racks (120) are respectively meshed.

8. The access port according to claims 4 and 5, characterized in that: The drive shaft (401) has a locking notch 1 (6) at one end and a locking notch 2 (601) at one end. When the driving end of the adjustment knob (402) is located on the inner wall of the component slot 2 (503), the locking notch 1 (6) and the locking notch 2 (601) engage. The ceiling embedded mounting base (101) has a storage slot (7) on one side. A partition (701) is slidably connected to the inner wall of the storage slot (7). A push-pull adjustment block (702) is fixed on one side of the partition (701).

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