Air supply system for constant temperature and humidity air conditioning unit

Abstract

The application belongs to the technical field of air conditioners, and discloses a supply air system for a constant-temperature and constant-humidity air conditioning unit, which comprises a shell and a heat dissipation fan, further comprises two mounting racks, the two mounting racks are fixedly installed in the interior of the shell, and a damping assembly is installed between the two mounting racks. Vibration generated by the heat dissipation fan is rubbed and dissipated by the annular convex tooth tooth surface of rubber material and is absorbed by elastic deformation before being transmitted to the shell, vibration energy is converted into heat energy consumption through internal friction of rubber molecular chains, the transmission amount of vibration to the shell is reduced, structural noise radiated by the shell wall plate is reduced, and problems such as loosening of fasteners, fatigue cracking of pipeline joints and the like caused by long-term vibration are relieved. Meanwhile, the pneumatic reaction force pushes the extended ring plate to move axially slightly, so that the meshing pressure of the convex tooth is increased, the friction damping force is correspondingly increased, and self-adaptive adjustment of the greater the pneumatic load, the stronger the damping effect is realized.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically an air supply system for a constant temperature and humidity air conditioning unit. Background Technology

[0002] A constant temperature and humidity air conditioning unit (commonly referred to as a constant temperature and humidity unit) is a specialized air conditioning device capable of precisely controlling ambient temperature and humidity. As the core heat dissipation equipment of an air conditioning system, it contains an axial flow fan driven by a motor. Forced airflow passes through the condenser fins, carrying away the heat released during refrigerant condensation and thus dissipating heat to the outside environment. The motor is typically fixed inside the outdoor unit casing by a motor bracket, and the fan is mounted on the motor's output shaft. The motor's rotation drives the fan to rotate at high speed, continuously delivering airflow for heat dissipation. During operation, the motor operates continuously for extended periods. Due to factors such as uneven mass distribution of the motor rotor, bearing wear clearances, and electromagnetic force pulsation, the motor inevitably generates periodic excitation forces. These forces are directly transmitted to the outdoor unit casing through the motor bracket, causing vibration of the casing panels and radiating structural noise into the surrounding space. Simultaneously, when the fan rotates at high speed, deviations in blade mass distribution or uneven dust accumulation on the blade surface also generate centrifugal unbalanced forces. These unbalanced forces, superimposed on the motor's excitation force, further exacerbate the overall vibration amplitude of the outdoor unit.

[0003] Existing outdoor unit motors typically employ simple rubber pads for vibration damping or direct bolt rigid connections. These damping methods are relatively limited, only absorbing a portion of high-frequency, low-amplitude vibrations. Their effectiveness in attenuating vibrations caused by low-frequency excitation forces from the motor and unbalanced fan operation is extremely limited. Under prolonged vibration, not only will the outdoor unit's operating noise exceed standards, affecting user comfort, but it will also lead to problems such as loosening of casing fasteners, fatigue cracking of pipe joints, and poor contact of electrical components, thus significantly reducing the operational reliability and lifespan of the air conditioning unit. Summary of the Invention

[0004] To address the problems mentioned in the background art, this invention provides an air supply system for constant temperature and humidity air conditioning units. This system solves the problems that most existing outdoor unit motors use rubber pads or bolts for rigid connection, resulting in single vibration reduction methods that can only weaken high-frequency vibrations and have poor attenuation of low-frequency excitation and fan imbalance forces. Over time, this leads to excessive noise, loose fasteners, pipe cracking, poor contact of electrical components, and reduced reliability and lifespan.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an air supply system for a constant temperature and humidity air conditioning unit, comprising a housing and a cooling fan, and further comprising: Two mounting brackets are fixedly mounted inside the housing. A vibration damping assembly, which is mounted between the two mounting brackets; The mounting assembly is located inside the vibration damping assembly, and the cooling fan is installed in the middle of the mounting assembly. The cooling fan achieves vibration isolation through the cooperation between the vibration damping assembly and the mounting assembly. The vibration damping assembly includes a first annular plate fixed between the two mounting brackets. The inner wall of the first annular plate is provided with a first annular protrusion. A second annular plate is fixed on one axial side of the first annular plate. The first annular plate and the second annular plate form an annular receiving cavity. The mounting assembly includes an extension ring plate located within the receiving cavity. A second annular protrusion is provided on the outer wall of the extension ring plate, and the second annular protrusion meshes with the first annular protrusion. The inner wall of the extended ring plate is provided with a ring array of lugs, and the cooling fan is connected to the lugs through a connector.

[0006] Preferably, both the first and second annular teeth are made of rubber. In the initial state, the first and second annular teeth are in meshing contact but not in a compressed state.

[0007] Preferably, a buffer gap is left between the tip of the second annular tooth and the bottom surface of the root of the first annular tooth on the first annular plate, and a buffer gap is left between the tip of the first annular tooth and the bottom surface of the root of the second annular tooth on the extension annular plate. The buffer gap prevents the tooth tip from contacting the bottom surface of the opposite tooth root during elastic deformation.

[0008] Preferably, a second friction plate is fixedly mounted on the tooth side surface of the second annular tooth, and a first friction plate is fixedly mounted on the tooth side surface of the first annular tooth. The second friction pad and the first friction pad are arranged in a one-to-one correspondence along the circumferential direction and are in contact with each other. The contact surface between the second friction pad and the first friction pad is a rough friction surface.

[0009] Preferably, a support ring is fixed between the first annular plate and the second annular plate, and a mating ring is fixed on the outer circumferential surface of the extension annular plate.

[0010] Preferably, the support ring and the docking ring are coaxially arranged, and a radial gap is left between the inner wall surface of the support ring and the outer wall surface of the docking ring, the radial gap allowing the docking ring to move slightly in the radial direction relative to the support ring.

[0011] Preferably, the support ring is provided with a plurality of elastic pull ropes arranged in a circumferential array, the outer ends of the elastic pull ropes are fixed to the support ring, and the inner ends of the elastic pull ropes are connected to the outer circumferential surface of the docking ring.

[0012] Preferably, in the initial state, the elastic rope is in a pre-tensioned state, and the pre-tension forces of the elastic ropes in each direction are balanced with each other, so that the docking ring and the extension ring plate are radially centered with the cooling fan.

[0013] Preferably, a second rubber pad is fixedly mounted on the end face of the extended ring plate facing the second ring plate, and a first rubber pad is fixedly mounted on the inner wall of the second ring plate at a position corresponding to the second rubber pad.

[0014] Preferably, in the initial state, there is a buffer gap between the first rubber pad and the second rubber pad. When the extension ring plate moves back to its original position under the action of the elastic pull rope, the first rubber pad and the second rubber pad come into contact and absorb the impact energy of the reset rebound.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a rubber ring-shaped toothed plate to dissipate vibrations generated by a cooling fan before they are transmitted to the housing. The vibration energy is dissipated through friction and elastic deformation of the rubber material's annular convex tooth surface. This converts vibration energy into heat energy through internal friction within the rubber molecular chains, reducing the amount of vibration transmitted to the housing and decreasing structural noise radiated from the housing panels. It also alleviates problems such as loosening of fasteners and fatigue cracking of pipe joints caused by long-term vibration. Simultaneously, the aerodynamic reaction force pushes the extended ring plate to slightly shift axially, increasing the meshing pressure of the convex teeth and correspondingly enhancing the frictional damping force. This achieves adaptive adjustment, where the greater the aerodynamic load, the stronger the vibration reduction effect.

[0016] This invention uses pre-tensioned elastic ropes arranged in a circular array to keep the docking ring and extension ring plate in a radially centered position. When the cooling fan deviates radially, the tension difference between the elastic ropes on both sides instantly forms a radial restoring force, pulling the cooling fan back to the centered position. It can respond instantly even under small amplitude and will not have slack or idle stroke. After the machine stops, the pre-tension of the elastic ropes is restored to balance, realizing automatic reset.

[0017] In the working stroke of this invention, the meshing friction of the rubber convex teeth and the sliding friction of the friction plate jointly attenuate the vibration energy. At the end of the reset stroke, the first rubber pad and the second rubber pad come into contact to absorb the rebound impact energy, thus avoiding secondary vibration noise caused by the extension ring plate hitting the second ring plate when it resets. The buffer gap ensures that the tip of the convex tooth does not touch the bottom during the deformation process, ensuring that the convex tooth is always in a flexible elastic deformation state, which improves the attenuation efficiency of low-frequency micro-amplitude vibration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention; Figure 2 This is a schematic diagram of the external structure of the cooling fan of the present invention; Figure 3 This is a schematic diagram of the side mounting structure of the cooling fan of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the cooling fan, mounting bracket and vibration damping components of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the vibration damping component of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the disassembled structure of the vibration damping component and the mounting component of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the vibration damping component and the mounting component of the present invention; Figure 9 This is a schematic diagram of the mating structure of the first annular tooth and the second annular tooth of the present invention.

[0019] In the diagram: 1. Housing; 2. Cooling fan; 3. Mounting bracket; 4. Vibration damping assembly; 41. First annular plate; 42. Second annular plate; 43. First annular tooth; 44. First friction plate; 5. Mounting assembly; 51. Connecting ring; 52. Support ring; 53. Elastic pull rope; 54. Connector; 55. Lug; 56. Extension ring plate; 57. Second annular tooth; 58. Second friction plate; 511. First rubber pad; 512. Second rubber pad. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0021] like Figures 1 to 9 As shown, the present invention provides an air supply system for a constant temperature and humidity air conditioning unit, including a housing 1 and a cooling fan 2, and further comprising: Two mounting brackets 3 are fixedly installed inside the housing 1; Vibration damping component 4 is installed between two mounting brackets 3; Mounting component 5 is located inside vibration damping component 4. Cooling fan 2 is installed in the middle of mounting component 5. Cooling fan 2 achieves vibration isolation through the cooperation of vibration damping component 4 and mounting component 5. The vibration damping assembly 4 includes a first annular plate 41 fixed between two mounting brackets 3. The inner wall of the first annular plate 41 is provided with a first annular protrusion 43. A second annular plate 42 is fixed on one axial side of the first annular plate 41. The first annular plate 41 and the second annular plate 42 form an annular receiving cavity. Mounting assembly 5 includes an extension ring plate 56, which is located in the receiving cavity. A second annular tooth 57 is provided on the outer wall of the extension ring plate 56, and the second annular tooth 57 meshes with the first annular tooth 43. The inner wall of the extended ring plate 56 is provided with lugs 55 in an annular array, and the cooling fan 2 is connected to the lugs 55 through the connector 54.

[0022] Both the first annular tooth 43 and the second annular tooth 57 are made of rubber. In the initial state, the first annular tooth 43 and the second annular tooth 57 are in meshing contact but not in a compressed state.

[0023] When the constant temperature and humidity air conditioning unit is running, the motor of the cooling fan 2 drives the cooling fan to rotate at high speed, forcing airflow through the condenser fins to carry away the heat released during the refrigerant condensation process, thus dissipating heat to the external environment. The cooling fan 2 is connected to the lug 55 on the extension ring plate 56 via the connector 54. The extension ring plate 56 is located in the receiving cavity of the vibration damping assembly 4. The cooling fan 2 is suspended inside the vibration damping assembly 4 via the mounting assembly 5, and there is no rigid connection between it and the housing 1.

[0024] During motor operation, the periodic excitation force generated by factors such as uneven rotor mass distribution, bearing wear clearance, and electromagnetic force pulsation, as well as the centrifugal imbalance force generated by blade mass deviation or uneven dust accumulation during cooling fan rotation, work together to cause the cooling fan 2 to drive the extension ring plate 56 to vibrate slightly within the accommodating cavity. When the extension ring plate 56 vibrates, there is a slight relative misalignment between the second annular protrusion 57 on its outer wall and the first annular protrusion 43 on the inner wall of the first annular plate 41. Since both the first annular protrusion 43 and the second annular protrusion 57 are made of rubber and are initially in meshing contact but not compressed, the slight misalignment between the tooth surfaces causes the rubber material to undergo repeated elastic deformation. During the internal friction process, the rubber molecular chains convert the vibrational mechanical energy into heat energy, thereby effectively attenuating the vibration caused by the motor excitation force and the fan imbalance force.

[0025] At the same time, the aerodynamic reaction force generated by the rotation of the cooling fan drives the cooling fan 2 to move axially. The cooling fan 2 drives the extension ring plate 56 to move slightly axially within the receiving cavity through the connector 54 and lug 55, which increases the meshing pressure between the first annular tooth 43 and the second annular tooth 57, and the contact normal pressure between the tooth surfaces increases accordingly. The friction damping force is correspondingly enhanced, realizing the adaptive adjustment of the greater the aerodynamic load, the stronger the vibration reduction effect.

[0026] After the cooling fan 2 stops, the aerodynamic reaction force disappears, and the first annular tooth 43 and the second annular tooth 57 return to their initial meshing state under their own elastic restoring force, and the extension ring plate 56 returns to its initial position. The two mounting brackets 3 fix the vibration damping assembly 4 as a whole inside the housing 1, providing a stable mounting reference for the cooling fan 2; the second annular plate 42 and the first annular plate 41 together form a receiving cavity, which limits the axial movement of the extension ring plate 56, preventing the extension ring plate 56 from excessively displacing under the action of aerodynamic thrust, which could lead to tooth dislodgement or overload damage.

[0027] Through the cooperation of the vibration damping component 4 and the mounting component 5, the vibration generated by the cooling fan 2 is first dissipated by the friction of the rubber teeth and absorbed by elastic deformation before it is transmitted to the housing 1. This greatly reduces the amount of vibration transmitted to the housing 1, reduces the structural noise radiated by the vibration of the housing wall panel, alleviates problems such as loose fasteners, fatigue cracking of pipe joints and poor contact of electrical components caused by long-term vibration, and improves the operational reliability and service life of the constant temperature and humidity air conditioning unit.

[0028] like Figure 6 As shown, a buffer gap is left between the tip of the second annular tooth 57 and the bottom surface of the root of the first annular tooth 43 on the first annular plate 41, and a buffer gap is left between the tip of the first annular tooth 43 and the bottom surface of the root of the second annular tooth 57 on the extension ring plate 56. The buffer gap prevents the tooth tip from contacting the bottom surface of the opposite tooth root during elastic deformation.

[0029] During the operation of the cooling fan 2, the motor excitation force and the centrifugal imbalance force of the fan cause the cooling fan 2 to drive the extension ring plate 56 to generate a slight vibration in the accommodating cavity. When the extension ring plate 56 vibrates, the second annular tooth 57 and the first annular tooth 43 undergo a slight relative misalignment. The rubber tooth generates elastic deformation during the misalignment process, and the vibration energy is converted into heat energy through the internal friction of the rubber molecular chain.

[0030] During the elastic deformation of the protruding tooth, a buffer gap is left between the tip of the second annular protruding tooth 57 and the bottom surface of the root of the first annular protruding tooth 43 on the first annular plate 41, and a buffer gap is left between the tip of the first annular protruding tooth 43 and the bottom surface of the root of the second annular protruding tooth 57 on the extended annular plate 56. The protruding tooth has sufficient deformation margin in the deformation direction, and the tip of the tooth will not make rigid contact with the bottom surface of the opposite root. This avoids the metal-rubber hard impact generated after the tip of the tooth touches the bottom, which will directly transmit the vibration to the first annular plate 41 or the extended annular plate 56. This ensures that the protruding tooth is always in a flexible elastic deformation state throughout the entire deformation stroke, so that the vibration energy is continuously and effectively dissipated through the internal friction of the rubber.

[0031] Meanwhile, the presence of the buffer gap allows the first annular tooth 43 and the second annular tooth 57 to maintain meshing contact in the initial state but not to be in a compressed state. There is only a slight contact preload between the teeth, which provides sufficient initial deformation space for the elastic deformation of the teeth. This allows low-frequency vibrations with small amplitudes to drive the teeth to produce effective elastic deformation and energy dissipation, thereby improving the sensitivity and attenuation efficiency of the vibration damping component 4 to low-frequency vibrations.

[0032] like Figures 6-9 As shown, a second friction plate 58 is fixedly mounted on the tooth side surface of the second annular tooth 57, and a first friction plate 44 is fixedly mounted on the tooth side surface of the first annular tooth 43. The second friction plate 58 and the first friction plate 44 are arranged in a one-to-one correspondence along the circumferential direction and are in contact with each other. The contact surface between the second friction plate 58 and the first friction plate 44 is a rough friction surface.

[0033] During the relative misalignment of the convex teeth, relative sliding occurs between the corresponding first friction plate 44 and second friction plate 58. The sliding friction between the rough friction surfaces converts the mechanical energy of the vibration into heat energy, resulting in frictional damping energy dissipation. Compared to frictional damping where only the rubber convex tooth surfaces are in direct contact, the first friction plate 44 and the second friction plate 58 provide a friction interface with a higher coefficient of friction and greater stability. This allows for effective frictional energy dissipation even under small amplitude vibrations, improving the damping component 4's sensitivity to attenuation of small-amplitude vibrations.

[0034] Meanwhile, the first annular protrusion 43 and the second annular protrusion 57 made of rubber undergo elastic deformation during vibration, providing a continuous elastic preload for the contact between the first friction plate 44 and the second friction plate 58, so that the friction plates always maintain a stable contact pressure. Even under high-frequency, low-amplitude vibration conditions, the friction plates will not detach from the contact, ensuring the continuity and stability of friction damping.

[0035] In addition, the first friction plate 44 and the second friction plate 58 are disposed on the tooth side and fit together, and the buffer gap is disposed between the tooth tip and the bottom surface of the opposite tooth root. The two do not interfere with each other. The friction plate on the tooth side is responsible for friction energy dissipation, and the buffer gap at the tooth tip ensures that the tooth tip does not touch the bottom when the tooth is elastically deformed. The two damping mechanisms work independently and together ensure that the damping component 4 can work effectively throughout the entire deformation stroke.

[0036] like Figures 5-8 As shown, a support ring 52 is fixed between the first annular plate 41 and the second annular plate 42, and a docking ring 51 is fixed on the outer circumferential surface of the extension annular plate 56.

[0037] The support ring 52 and the docking ring 51 are coaxially arranged, and a radial gap is left between the inner wall surface of the support ring 52 and the outer wall surface of the docking ring 51. The radial gap allows the docking ring 51 to move slightly in the radial direction relative to the support ring 52.

[0038] Multiple elastic pull ropes 53 are arranged in a circular array along the upper edge of the support ring 52. The outer ends of the elastic pull ropes 53 are fixed to the support ring 52, and the inner ends of the elastic pull ropes 53 are connected to the outer circumferential surface of the docking ring 51.

[0039] In the initial state, the elastic rope 53 is in a pre-tensioned state, and the pre-tension forces of the elastic rope 53 in each direction are balanced with each other, so that the docking ring 51 and the extension ring plate 56 are radially centered with the cooling fan 2.

[0040] Before the cooling fan 2 starts operating, the elastic ropes 53 are already pre-tensioned. Multiple elastic ropes 53 arranged in a circular array uniformly pull the connecting ring 51 radially inward. The pre-tension forces in each direction are balanced, keeping the connecting ring 51, the extension ring plate 56 connected to the connecting ring 51, and the cooling fan 2 as a whole radially centered within the receiving cavity. During the operation of the cooling fan 2, when the motor excitation force or the fan's unbalanced force causes radial displacement, the elastic rope 53 in the displacement direction is further stretched, increasing the tension, while the elastic rope 53 on the opposite side contracts, decreasing the tension. The tension difference between the two elastic ropes 53 forms a radial restoring force, pulling the cooling fan 2 back to the centered position, achieving radial self-alignment.

[0041] When the cooling fan 2 moves axially under the aerodynamic reaction force, the docking ring 51 moves axially synchronously with the extension ring plate 56. The radial gap between the support ring 52 and the docking ring 51 allows the docking ring 51 to slide freely in the axial direction without interfering with the support ring 52, ensuring that the axial movement of the cooling fan 2 is not hindered by the elastic rope 53 and the support ring 52. The pre-tension state of the elastic rope 53 ensures that the docking ring 51 is radially elastically constrained in its initial position. Even under vibration conditions with small amplitude, the elastic rope 53 can generate a restoring force in time, without any slack or idle stroke, ensuring the response sensitivity of radial alignment. After the cooling fan 2 stops, the aerodynamic thrust disappears, and the first annular tooth 43 and the second annular tooth 57 return to their initial positions under the action of their own elastic restoring force. At the same time, the pre-tension force of the elastic rope 53 in each direction is restored to balance, pulling the docking ring 51 and the extension ring plate 56 back to the radially centered position, achieving automatic reset. The support ring 52 is fixed between the first annular plate 41 and the second annular plate 42, serving as a fixed reference for the elastic pull rope 53. It provides a stable external anchor point for the elastic pull rope 53, enabling the radial tension of the elastic pull rope 53 to be effectively transmitted to the docking ring 51, thus ensuring the reliability of the centering function.

[0042] like Figure 6 and Figure 8As shown, a second rubber pad 512 is fixedly installed on the end face of the extension ring plate 56 facing the second ring plate 42, and a first rubber pad 511 is fixedly installed on the inner wall of the second ring plate 42 at a position corresponding to the second rubber pad 512. In the initial state, there is a buffer gap between the first rubber pad 511 and the second rubber pad 512. When the extension ring plate 56 moves back to its original position under the action of the elastic pull rope 53, the first rubber pad 511 and the second rubber pad 512 come into contact and absorb the impact energy of the reset rebound.

[0043] When the cooling fan 2 stops working, the aerodynamic load disappears, and the elastic pull rope 53 retracts under the pre-tension force. This retracts, driving the extension ring plate 56 and the cooling fan 2 to move away from the condenser via the docking ring 51. During the resetting process, the extension ring plate 56 rebounds towards the second annular plate 42, and the buffer gap between the first rubber pad 511 and the second rubber pad 512 gradually decreases until they come into contact. The first rubber pad 511 and the second rubber pad 512 undergo elastic compression deformation, absorbing the impact energy of the extension ring plate 56's rebound and preventing the end of the extension ring plate 56 from impacting the second annular plate 42 and generating secondary vibration noise. After the extension ring plate 56 is fully reset, the elastic pull rope 53 returns to its pre-tensioned state, the buffer gap between the first rubber pad 511 and the second rubber pad 512 is restored, and the extension ring plate 56 returns to its initial centered equilibrium state. Through the division of labor between the annular tooth meshing friction damping during the working stroke and the rubber pad buffering and anti-impact at the end of the resetting stroke, vibration damping protection is achieved throughout the entire reciprocating motion of the motor.

[0044] Working principle and usage process of this invention: Step 1: Initial Installation Status The cooling fan 2 is connected to the lug 55 on the extension ring plate 56 via the connector 54. The extension ring plate 56 is located in the receiving cavity formed by the first ring plate 41 and the second ring plate 42. The second annular protrusion 57 on the outer wall of the extension ring plate 56 meshes with the first annular protrusion 43 on the inner wall of the first ring plate 41 but is not in a compressed state. The multiple elastic pull ropes 53 arranged in a circumferential array are in a pre-tensioned state. The pre-tensioning forces in each direction are balanced with each other, so that the docking ring 51 and the extension ring plate 56 and the cooling fan 2 are kept in the radial center position of the receiving cavity. A buffer gap is left between the first rubber pad 511 and the second rubber pad 512, and the two do not contact each other.

[0045] Step 2: Motor Start-up and Pneumatic Load Establishment The motor of the cooling fan 2 drives the cooling fan to rotate at high speed, forcing airflow through the condenser fins to dissipate heat to the outside. The aerodynamic reaction force generated by the rotation of the cooling fan pushes the cooling fan 2 to move slightly along the axial direction towards the condenser. The cooling fan 2 drives the extension ring plate 56 to move synchronously axially in the receiving cavity through the connector 54 and lug 55, thereby increasing the meshing pressure between the first annular tooth 43 and the second annular tooth 57.

[0046] Step 3: Vibration damping and adaptive friction enhancement The periodic excitation force generated during motor operation and the centrifugal imbalance force of the fan cause the cooling fan 2 to drive the extension ring plate 56 to produce slight vibrations within the accommodating cavity. During this vibration, the second annular tooth 57 and the first annular tooth 43 undergo slight relative misalignment. The rubber teeth undergo repeated elastic deformation during this misalignment, and the friction within the rubber molecular chains converts the vibrational mechanical energy into heat energy. Simultaneously, the relative misalignment of the teeth causes relative sliding between the rough contact surfaces of the first friction plate 44 and the second friction plate 58, resulting in frictional damping energy dissipation. The greater the aerodynamic reaction force, the greater the axial displacement of the extension ring plate 56, the higher the meshing pressure of the teeth, and the correspondingly enhanced tooth surface frictional damping force, achieving adaptive adjustment where the greater the aerodynamic load, the stronger the vibration reduction effect.

[0047] Step 4: Radial Adaptive Centering When the cooling fan 2 deviates radially during operation, the elastic rope 53 in the direction of deviation is further stretched and the tension increases, while the elastic rope 53 on the opposite side contracts and the tension decreases. The tension difference between the elastic ropes 53 on both sides forms a radial restoring force, pulling the cooling fan 2 back to the center position. When the docking ring 51 slides in the axial direction with the extension ring plate 56, the radial gap between the support ring 52 and the docking ring 51 allows the docking ring 51 to move freely in the axial direction without interfering with the support ring 52.

[0048] Step 5: Shutdown, Reset, and Shock Absorption After the cooling fan 2 stops, the aerodynamic reaction force disappears, and the first annular tooth 43 and the second annular tooth 57 return to their initial meshing state under their own elastic restoring force. The elastic pull rope 53 retracts under the pre-tension force, and drives the extension ring plate 56 and the cooling fan 2 to reset in the direction away from the condenser through the docking ring 51. During the reset process, the extension ring plate 56 rebounds towards the second annular plate 42, and the buffer gap between the first rubber pad 511 and the second rubber pad 512 gradually decreases until they come into contact. The elastic compression deformation of the rubber pads absorbs the impact energy of the reset rebound, preventing the extension ring plate 56 from hitting the second annular plate 42 and generating secondary vibration noise. After the reset is in place, the pre-tension force of the elastic pull rope 53 in each direction is restored to balance, the buffer gap between the first rubber pad 511 and the second rubber pad 512 is restored, and the cooling fan 2 returns to its initial central equilibrium state.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air supply system for a constant temperature and humidity air conditioning unit, comprising a housing (1) and a heat dissipation fan (2), characterized in that, Also includes: Two mounting brackets (3) are fixed inside the housing (1); Vibration damping component (4), which is installed between the two mounting brackets (3); The mounting component (5) is located inside the vibration damping component (4), and the cooling fan (2) is installed in the middle of the mounting component (5). The cooling fan (2) achieves vibration isolation through the cooperation of the vibration damping component (4) and the mounting component (5). The vibration damping assembly (4) includes a first annular plate (41) fixed between the two mounting brackets (3), the inner wall of the first annular plate (41) is provided with a first annular protrusion (43), and a second annular plate (42) is fixed on one axial side of the first annular plate (41), and an annular receiving cavity is formed between the first annular plate (41) and the second annular plate (42). The mounting assembly (5) includes an extension ring plate (56) located in the receiving cavity. A second annular tooth (57) is provided on the outer wall of the extension ring plate (56), and the second annular tooth (57) meshes with the first annular tooth (43). The inner wall of the extended ring plate (56) is provided with lugs (55) in an annular array, and the cooling fan (2) is connected to the lugs (55) through a connector (54).

2. The air supply system for a constant temperature and humidity air conditioning unit according to claim 1, wherein: Both the first annular tooth (43) and the second annular tooth (57) are made of rubber. In the initial state, the first annular tooth (43) and the second annular tooth (57) are engaged and in contact but not in a compressed state.

3. The air supply system for a constant temperature and humidity air conditioning unit according to claim 1, characterized in that: A buffer gap is left between the tip of the second annular tooth (57) and the bottom surface of the root of the first annular tooth (43) on the first annular plate (41), and a buffer gap is left between the tip of the first annular tooth (43) and the bottom surface of the root of the second annular tooth (57) on the extension annular plate (56). The buffer gap prevents the tooth tip from contacting the bottom surface of the opposite tooth root during elastic deformation.

4. The air supply system for a constant temperature and humidity air conditioning unit according to claim 1, characterized in that: A second friction plate (58) is fixedly mounted on the tooth side surface of the second annular tooth (57), and a first friction plate (44) is fixedly mounted on the tooth side surface of the first annular tooth (43). The second friction plate (58) and the first friction plate (44) are arranged in a circumferential direction and are in contact with each other. The contact surface between the second friction plate (58) and the first friction plate (44) is a rough friction surface.

5. The air supply system for a constant temperature and humidity air conditioning unit according to claim 1, characterized in that: A support ring (52) is fixed between the first annular plate (41) and the second annular plate (42), and a docking ring (51) is fixed on the outer circumferential surface of the extension annular plate (56).

6. The air supply system for a constant temperature and humidity air conditioning unit according to claim 5, characterized in that: The support ring (52) is coaxially arranged with the docking ring (51). A radial gap is left between the inner wall surface of the support ring (52) and the outer wall surface of the docking ring (51). The radial gap allows the docking ring (51) to move slightly in the radial direction relative to the support ring (52).

7. The air supply system for a constant temperature and humidity air conditioning unit according to claim 6, characterized in that: Multiple elastic pull ropes (53) are arranged in a circular array along the support ring (52). The outer end of the elastic pull rope (53) is fixed to the support ring (52), and the inner end of the elastic pull rope (53) is connected to the outer circumferential surface of the docking ring (51).

8. The air supply system for a constant temperature and humidity air conditioning unit according to claim 7, characterized in that: In the initial state, the elastic pull rope (53) is in a pre-tensioned state, and the pre-tension forces of the elastic pull rope (53) in each direction are balanced with each other, so that the docking ring (51) and the extension ring plate (56) remain radially centered with the cooling fan (2).

9. The air supply system for a constant temperature and humidity air conditioning unit according to claim 7, characterized in that: The end face of the extended ring plate (56) facing the second ring plate (42) is fixed with a second rubber pad (512), and the inner wall of the second ring plate (42) is fixed with a first rubber pad (511) at the position corresponding to the second rubber pad (512).

10. The air supply system for a constant temperature and humidity air conditioning unit according to claim 9, characterized in that: In the initial state, there is a buffer gap between the first rubber pad (511) and the second rubber pad (512). When the extension ring plate (56) moves back to its original position under the action of the elastic pull rope (53), the first rubber pad (511) and the second rubber pad (512) come into contact and absorb the impact energy of the reset rebound.

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