Active vibration reduction and passive noise elimination collaborative control device of air-cooled heat pump unit

Abstract

The application relates to the field of air-cooled heat pump vibration reduction and noise reduction, and discloses an active vibration reduction and passive noise elimination collaborative control device of an air-cooled heat pump unit, which comprises an integrated box type main stand, a two-stage passive vibration reduction assembly, an array type active vibration reduction assembly, a floating bearing platform, an adjustable passive noise elimination flow guide mechanism and a collaborative controller; further comprising a load separation support assembly, a dynamic sealing structure, a differential pressure sensor and a feedforward control module. The feedforward control module is electrically connected to a variable frequency driver to read the operating frequency and output a feedforward vibration suppression instruction, and the feedback input end of the collaborative controller is connected to a vibration sensor; the differential pressure sensor is arranged in a noise elimination air duct, and the collaborative controller is provided with a differential pressure safety protection logic; when the air duct differential pressure exceeds a threshold value, the minimum opening degree of the adjustable noise elimination flow guide plate is forced to be not less than 45 degrees. The application realizes collaborative regulation and control of vibration reduction and noise elimination, guarantees low-frequency suppression effect and heat exchange safety of the unit.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction and noise reduction technology for air-cooled heat pumps, specifically, to a coordinated control device for active vibration reduction and passive noise reduction of air-cooled heat pump units. Background Technology

[0002] When commercial air-cooled heat pump units are in operation, the compressor's variable frequency start-up and shutdown, as well as dynamic load changes, generate low-frequency vibrations. The continuous rotation of the axial flow fan creates aerodynamic noise and periodic pulsating vibrations. Vibrations are transmitted to the ground through the unit's base, forming solid-borne sound, while airborne noise is radiated outwards through the air inlet and outlet, adversely affecting the acoustic environment around the building.

[0003] Existing technologies have several drawbacks: First, the vibration damping structure and the silencing structure are independent of each other, generally employing a separate design with a base vibration damping pad and an external sound insulation cover. This results in a large structural footprint, and numerous sound leakage channels exist at the connection between the sound insulation cover and the base. Second, relying solely on passive vibration damping is insufficient to effectively suppress low-frequency resonance in the compressor, while simply installing an active vibration damping mechanism leads to long-term high-load operation, high energy consumption, and limited service life. Furthermore, there is a lack of an integrated active-passive coupling support structure. Third, the vibration damping control system and the silencing device operate independently, making it impossible to synchronously adjust the acoustic parameters of the silencing structure according to the unit's vibration conditions. First, when low-frequency vibrations excite secondary structural noise, the silencing device cannot match and adjust in real time; second, conventional unit bases lack integrated duct silencing structures, and refrigerant pipes and cable penetrations lack sound insulation and sealing measures, so airborne and solid-borne sound cannot be completely blocked; third, existing active vibration reduction controls are mostly pure feedback modes, which have control time delays and "waterbed effects," resulting in poor stability during wide-frequency inverter processes of the compressor; fourth, adjustable silencing ducts lack a linkage protection mechanism with heat exchange efficiency during adjustment, and are prone to triggering high-pressure protection of the unit due to excessive duct resistance, reducing the overall energy efficiency ratio.

[0004] Therefore, there is an urgent need to develop an integrated structure to achieve coordinated control of active vibration reduction and passive noise reduction, while solving technical problems such as protection against large load impacts, stability of wideband control, and heat exchange safety. Summary of the Invention

[0005] The purpose of this invention is to provide a coordinated control device for active vibration reduction and passive noise reduction of air-cooled heat pump units, which solves the technical problems of existing air-cooled heat pump vibration reduction and noise reduction structures being independent and scattered, lacking coordinated control, and unable to simultaneously address low-frequency vibration suppression, control stability, and heat exchange efficiency safety.

[0006] This invention is achieved through the following technical solution: an active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit, comprising an integrated box-type main frame, a two-stage passive vibration reduction assembly, an array-type active vibration reduction assembly, a floating bearing platform, an adjustable passive noise reduction and airflow guiding mechanism, and a coordinated controller; It also includes a load separation support assembly, a dynamic sealing structure, a differential pressure sensor, and a feedforward control module; The load separation support assembly includes air springs arranged in parallel between the floating load-bearing platform and the integrated box-type main frame, and the array-type active vibration damping assembly; the air springs are used to bear the static load of the unit, and the active vibration damping assembly is used to output dynamic reverse counteracting force. The dynamic sealing structure includes a labyrinthine sealing rubber curtain disposed in the gap between the floating bearing platform and the side wall of the integrated box-type main frame. The input terminal of the feedforward control module is electrically connected to the variable frequency drive of the air-cooled heat pump unit to read the compressor operating frequency and output feedforward vibration suppression command; the feedback input terminal of the cooperative controller is connected to a vibration sensor. The differential pressure sensor is installed inside the impedance composite silencing duct and is electrically connected to the coordinating controller. The coordinating controller has built-in differential pressure safety protection logic. When the duct differential pressure exceeds a preset threshold, it forcibly limits the minimum opening of the adjustable silencing guide plate to no less than 45°.

[0007] To better realize the present invention, the collaborative controller further includes a built-in soft-start pre-tightening logic module, which is used to drive the active vibration damping assembly to output pre-tightening force 0.5s to 1s before the air-cooled heat pump compressor starts, so as to establish initial balance.

[0008] To better realize the present invention, the side wall of the integrated box-type main frame is provided with an independent forced convection heat dissipation duct corresponding to the electromagnetic active actuator installation area, and the heat dissipation duct is physically isolated from the sound-absorbing inner cavity.

[0009] To better realize the present invention, the impedance composite silencing duct is further equipped with an active silencing speaker array, and the collaborative controller drives the speaker to emit anti-phase sound waves for active noise reduction based on the noise frequency collected by the noise acquisition unit.

[0010] To better realize the present invention, the two-stage passive vibration damping assembly further includes a primary passive vibration damper and a secondary damping buffer strip; the primary passive vibration damper is supported and arranged between the bottom of the integrated box-type main frame and the foundation; the secondary damping buffer strip fills the gap area between the floating bearing platform and the integrated box-type main frame.

[0011] To better realize the present invention, the integrated box-type main frame is further provided with a load-bearing partition inside; the array-type active vibration damping assembly includes several electromagnetic active actuators; the lower end of the electromagnetic active actuator is fixed to the load-bearing partition, and the upper end is rigidly connected to the floating bearing platform.

[0012] To better realize the present invention, the electromagnetic active actuator is further divided into a compressor array actuator and a fan auxiliary actuator; the compressor array actuator is arranged in the area directly below the air-cooled heat pump compressor; the fan auxiliary actuator is arranged in the area below the axial flow fan support of the unit.

[0013] To better realize the present invention, a guide and limiting assembly is further provided between the floating bearing platform and the integrated box-type main frame; the guide and limiting assembly includes a guide column and a polyurethane buffer limiting sleeve, and a set floating gap is reserved between the floating bearing platform and the buffer limiting sleeve.

[0014] To better realize the present invention, the integrated box-type main frame side plate is further provided with pipeline through holes, and a flexible sealing sleeve is installed at the pipeline through holes.

[0015] To better realize the present invention, the adjustable passive noise reduction and flow guiding mechanism further includes an adjustable noise reduction and flow guiding plate and a servo drive mechanism for driving the flow guiding plate to swing; the adjustable noise reduction and flow guiding plate can rotate within the angle range of 0° to 90°, and is limited by the differential pressure safety protection logic, and its minimum working opening is limited to not less than 45°.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) An integrated box-type main frame is set up, which integrates the load-bearing base, the sound-absorbing inner cavity, and the impedance composite sound-absorbing air duct into one unit, abandoning the traditional separate arrangement of the base and the soundproof cover. The structure is compact and effectively reduces the location of sound leakage.

[0017] (2) By setting up a load separation support assembly in parallel with the air spring and the electromagnetic actuator, the air spring bears most of the static load and steady-state dynamic load, while the electromagnetic actuator only outputs dynamic compensation force. This completely solves the engineering problems of the actuator's poor resistance to lateral force and easy cylinder collision and rubbing in the traditional scheme, and greatly improves the reliability and impact resistance of the device.

[0018] (3) A feedforward + feedback composite control strategy is adopted. The feedforward module predicts the excitation force based on the compressor operating frequency and current harmonics, and the feedback module corrects the residual based on the vibration sensor. This overcomes the time delay and waterbed effect of pure feedback control and significantly improves the vibration suppression stability under wide frequency band (especially the frequency conversion process).

[0019] (4) Set up a soft start pre-tightening logic module to output pre-tightening force before the compressor starts to establish initial balance, effectively reduce the peak impact at the moment of start-up, and further broaden the effective working conditions of the active vibration damping system.

[0020] (5) By setting a differential pressure sensor and safety protection logic in the air duct, the minimum opening of the adjustable noise reduction guide plate is forcibly limited to not less than 45°, which effectively solves the contradiction between passive noise reduction air duct and unit heat exchange efficiency, ensures that noise reduction measures do not trigger unit high-pressure protection, and guarantees the overall energy efficiency ratio (COP).

[0021] (6) The addition of a labyrinthine dynamic sealing structure and an independent forced convection heat dissipation channel blocked the sound leakage path of the floating platform gap and solved the problem of the electromagnetic actuator coil heating in the enclosed box, enabling the system to have the ability to operate stably in all weather conditions for a long time.

[0022] (7) An active noise reduction loudspeaker array is embedded in the air duct to achieve active noise reduction and passive noise reduction coupling, which further improves the noise reduction effect across the entire frequency band.

[0023] (8) The overall modular integration can be pre-installed in the production stage of a brand-new air-cooled heat pump unit, or it can be directly used in existing commercial air-cooled heat pump retrofit projects, making it widely applicable to engineering projects. Attached Figure Description

[0024] Figure 1 This is a front view of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the internal structure of the integrated box-type main frame of the present invention; Figure 3 Schematic diagram of the adjustable airflow guiding mechanism inside the noise-absorbing duct; Figure 4 This is a block diagram illustrating the signal acquisition and coordinated control principle of the present invention; Figure 5 This is a block diagram of the feedforward + feedback composite control logic of the collaborative controller of the present invention.

[0025] The components include: 1-Integrated box-type main frame; 2-Silenced inner cavity; 3-Impedance composite silencer air duct; 4-Adjustable silencer guide plate; 5-Servo drive mechanism; 6-First-stage passive vibration damper; 7-Load-bearing partition; 8-Electromagnetic active actuator; 9-Floating load-bearing platform; 10-Second-stage damping buffer strip; 11-Guide limit assembly; 12-Flexible sealing sleeve; 13-Vibration sensor; 14-Noise acquisition unit; 15-Collaborative controller; 16-Air-cooled heat pump unit; 17-Airbag type air spring; 18-Maze-type sealing rubber curtain; 19-Differential pressure sensor; 20-Forced convection cooling air duct; 21-Active silencer speaker array. Detailed Implementation

[0026] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] 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.

[0028] Example 1:

[0029] like Figures 1-3 As shown, an active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit includes an integrated box-type main frame 1, a two-stage passive vibration reduction assembly, an array-type active vibration reduction assembly, a floating bearing platform 9, an adjustable passive noise reduction and flow guiding mechanism, a load separation support assembly, a dynamic sealing structure, and a coordinated controller 15.

[0030] The integrated box-type main frame 1 is made of Q235 steel plate, bent and fully welded to form a closed box, with external dimensions of 1800mm (length) × 850mm (width) × 320mm (height). The interior of the box forms a sound-absorbing cavity 2, filled with 48kg / m³ centrifugal glass wool as a high-density sound-absorbing material. Micro-perforated sound-absorbing panels with 0.8mm pore diameter are adhered to the inner wall. The main frame has integrated impedance composite sound-absorbing ducts 3 on both sides. Pipeline through-holes are provided on the side panels of the box, and flexible sealing sleeves 12 made of nitrile rubber are fitted into these through-holes. Refrigerant pipes and control cables pass through the flexible sealing sleeves 12, achieving sound insulation and sealing at the through-hole locations.

[0031] The two-stage passive vibration damping assembly includes a primary passive vibration damper 6 and a secondary damping buffer strip 10. The primary passive vibration damper 6 is a rubber-metal composite damping vibration damper, with a total of 6 sets evenly distributed and installed between the bottom of the integrated box-type main frame and the foundation to undertake foundation vibration isolation. The secondary damping buffer strip 10 is laid in the gap area around the floating bearing platform 9 to eliminate collision noise caused by direct contact between metal components.

[0032] The integrated box-type main frame 1 has a load-bearing partition 7 welded and fixed inside; the array-type active vibration damping assembly includes multiple sets of electromagnetic active actuators 8; four compressor array actuators are arranged directly below the compressor, and two fan auxiliary actuators are arranged below the fan; the lower end of the electromagnetic active actuator 8 is rigidly fixed to the load-bearing partition 7, and the upper end is rigidly connected to the floating bearing platform 9 through a flange structure.

[0033] In this embodiment, the load separation support assembly includes air springs 17 arranged in parallel between the floating load-bearing platform 9 and the integrated box-type main frame 1, and the array-type active vibration damping assembly (electromagnetic active actuator 8). Specifically, between the load-bearing partition 7 and the floating load-bearing platform 9, in addition to the original electromagnetic active actuator 8 (specifically selected as a voice coil motor or moving magnet actuator), four sets of double-bladder air springs are evenly distributed. The initial inflation pressure of these air springs is set to 0.4~0.6MPa, used to bear approximately 85% of the static weight of the air-cooled heat pump unit 16. At this time, the electromagnetic active actuator 8 only needs to output ±30% of the dynamic compensation force, and because the platform gravity is balanced by the air springs, the lateral impact load is mainly absorbed by the polyurethane buffer sleeve of the guide limit assembly 11 described later, greatly reducing the risk of the actuator bearing the overturning moment. The air-cooled heat pump unit 16 is hoisted and fixed on the floating load-bearing platform 9 as a whole, realizing the floating support of the entire unit.

[0034] Example 2:

[0035] like Figure 1 , Figure 2 As shown, four sets of guide and limit assemblies 11 are assembled between the floating load platform 9 and the integrated box-type main frame 1. The guide and limit assembly 11 includes guide columns and polyurethane buffer limit sleeves. A 3mm floating gap is reserved between the floating load platform and the buffer limit sleeve to limit the horizontal displacement of the platform, while not restricting the vertical vibration damping floating stroke to prevent the electromagnetic active actuator 8 from overtravel failure.

[0036] In this embodiment, the dynamic sealing structure includes a labyrinthine sealing rubber curtain 18 disposed in the gap between the floating support platform 9 and the integrated box-shaped main frame 1. Specifically, a multi-layered labyrinthine sealing curtain made of weather-resistant rubber is used around the 150mm high floating gap between the floating support platform 9 and the integrated box-shaped main frame 1. The sealing curtain has a "W" shaped bend in cross-section, with one end bolted to the upper edge of the frame and the other end hanging down naturally to cover the side wall of the platform. It maintains a close fit by its own weight, effectively blocking the airborne sound transmission path without restricting the vertical floating of the platform.

[0037] Example 3:

[0038] like Figure 4 , Figure 5As shown, the collaborative controller 15 adopts a DSP+ARM dual-core architecture. Vibration sensors 13 are respectively arranged on the floating support platform, compressor housing, and fan support, and acceleration-type vibration sensors are selected; the noise acquisition unit 14 is a microphone, which is embedded in the impedance composite silencing duct 3. Vibration sensors 13, noise acquisition unit 14, each group of electromagnetic active actuators 8, and servo drive mechanism 5 are all electrically connected to the collaborative controller 15.

[0039] The collaborative controller 15 incorporates a feedforward control module and a feedback compensation module. The input of the feedforward control module is electrically connected to the variable frequency drive of the air-cooled heat pump unit, used to read the compressor operating frequency and current harmonics in real time, predict the excitation force characteristics based on the built-in unit mass-stiffness mathematical model, and output feedforward vibration suppression commands. The input of the feedback compensation module is electrically connected to the vibration sensors 13 installed on the floating bearing platform, compressor housing, and fan support, used to collect real-time residual vibration signals and output correction compensation commands.

[0040] When the unit is in the frequency conversion switching phase, the feedforward module of the co-controller 15 first reads the carrier frequency and speed command of the compressor frequency converter through a hard-wired connection, and calculates the feedforward base drive voltage by combining the built-in unit mass-stiffness mathematical model. At the same time, the acceleration-type vibration sensor 13 installed on the compressor foot picks up the residual vibration signal, and after FFT (Fast Fourier Transform) decomposition, the feedback module outputs a correction voltage for superposition, realizing feedforward + feedback composite control.

[0041] In this embodiment, the collaborative controller 15 incorporates a soft-start pre-tightening logic module. At the moment of unit startup, the control logic prioritizes executing the soft-start pre-tightening command: 0.8 seconds before the contactor engages (i.e., within the 0.5-1 second interval before compressor startup), a bias current opposite to the estimated starting force is applied to the electromagnetic actuator, creating an "active damping" effect and establishing initial equilibrium. After the unit vibration peak has passed, dynamic follow-up control is then implemented. Actual measurements show that this can reduce the starting impact peak by approximately 40%. Example 4:

[0042] like Figure 3 As shown, the impedance composite silencing duct 3 is equipped with an adjustable passive silencing and flow guiding mechanism; the adjustable silencing and flow guiding plate 4 is driven to swing by a servo drive mechanism 5, and the adjustment angle range is 0°~90°.

[0043] In this embodiment, a differential pressure sensor 19 is also installed inside the impedance composite silencing duct 3. When strong winds or load fluctuations cause increased vibration, the co-controller 15 identifies that the unit's vibration amplitude exceeds a preset threshold and controls the servo drive mechanism 5 to rotate the adjustable silencing guide plate 4 from fully open (0°) to a smaller angle, reducing the duct's flow cross-section, extending the sound wave propagation path, and matching and suppressing vibration-induced secondary structural noise. At this time, the differential pressure sensor embedded in the impedance composite silencing duct 3 monitors the static pressure difference inside and outside the duct in real time. The co-controller has built-in safety comparison logic: when the duct pressure difference is detected to rise to a set threshold A (corresponding to the point where the minimum flow area causes the fan characteristic curve to deteriorate), the controller immediately terminates the guide plate's continued closing action, forcibly locks the opening to no less than 45°, and prioritizes outputting an alarm signal to indicate abnormal wind resistance. This logic ensures that even under high noise conditions, the condenser's air intake volume is still no less than 85% of the design value, avoiding frequent unit trips due to high-pressure protection and effectively guaranteeing the overall unit's coefficient of performance (COP). Example 5:

[0044] like Figure 2 As shown, the integrated box-type main frame 1 has an independent forced convection cooling duct 20 on its side wall corresponding to the installation area of ​​the electromagnetic active actuator 8. This cooling duct is physically isolated from the sound-absorbing inner cavity 2. Specifically, an independent sandwich-type air duct is welded to the outside of the steel plate on the side of the frame. An axial flow fan provides forced ventilation to the electromagnetic actuator coil area. This sandwich-type air duct is physically isolated from the sound-absorbing inner cavity filled with centrifugal glass wool, preventing heat from entering the sound-absorbing material and causing aging. At the same time, it prevents heat accumulation from causing the actuator coil resistance to increase and the output to decrease, ensuring the long-term stable operation of the active vibration damping system.

[0045] Example 6:

[0046] like Figure 3 As shown, the impedance composite silencing duct 3 is also equipped with an active silencing speaker array 21. The collaborative controller 15 generates an anti-phase sound wave signal with the opposite phase to the noise through an internal algorithm based on the rotational noise frequency collected by the noise acquisition unit 14 (microphone), drives the speaker to emit an anti-phase sound wave for active noise reduction, and realizes further coupling of active and passive noise reduction, significantly improving the noise reduction effect in the mid and low frequency bands.

[0047] Example 7:

[0048] The working process of this device is as follows: Steady-state rated operating conditions: The vibration amplitude of the unit is at a low level, and the electromagnetic active actuator is controlled by the coordinating controller to standby with low power consumption; vibration isolation is mainly achieved by the primary passive vibration damper and the secondary damping buffer strip; air noise is passively absorbed by the silencing cavity and the double-sided impedance composite silencing air duct, and the adjustable silencing guide plate is kept in the fully open state (0°) to ensure the ventilation volume of the air-cooled heat pump and ensure the heat exchange efficiency.

[0049] Dynamic variable operating conditions, namely the unit startup, shutdown, and variable frequency load switching stages: Vibration sensors collect low-frequency large-amplitude vibration signals, while the feedforward control module reads the compressor inverter frequency and current harmonics. After processing by the controller, these signals drive each group of electromagnetic active actuators to output reverse canceling forces, suppressing low-frequency resonance caused by the compressor and fan. Simultaneously, the controller outputs control signals to the servo drive mechanism, rotating the adjustable silencer baffle to reduce the duct cross-section, lengthen the sound wave propagation path, and weaken vibration-induced secondary structural noise, achieving synchronous and coordinated adjustment of active vibration reduction and passive silencer duct acoustic parameters. When the differential pressure sensor detects that the duct pressure difference exceeds the preset safety threshold, the baffle opening is forcibly limited to no less than 45°.

[0050] Once the vibration amplitude returns to the normal threshold range, the adjustable silencer baffle reopens, restoring the ventilation capacity of the air duct. The electromagnetic active actuator reduces its output power, and the device re-enters the energy-saving steady-state operation mode.

[0051] When encountering extreme working conditions such as strong winds and impact loads, the guide limit assembly restricts the maximum horizontal displacement of the floating bearing platform and protects the electromagnetic active actuator; the two-stage passive vibration reduction structure continuously provides damping energy dissipation; the airbag-type air spring bears the static load and impact buffer, ensuring the long-term stable operation of the entire device.

[0052] Example 8:

[0053] At the pipeline through-holes on the side panel of the integrated box-type main frame 1, flexible sealing sleeves 12 made of nitrile rubber are installed. Refrigerant pipelines and control cables pass through the flexible sealing sleeves 12, achieving sound insulation and sealing at the through-hole locations and blocking the propagation paths of solid-borne sound and airborne noise. The overall device adopts a modular integrated design, which can be pre-installed during the production of new air-cooled heat pump units, or directly used in existing commercial air-cooled heat pump retrofit projects. It only requires the original unit to be hoisted and fixed on the floating support platform 9, and the pipelines and cables to be connected before it can be put into use, making it widely applicable to various projects.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A coordinated control device for active vibration reduction and passive noise reduction of an air-cooled heat pump unit, comprising an integrated box-type main frame (1), a two-stage passive vibration reduction assembly, an array-type active vibration reduction assembly, a floating bearing platform (9), an adjustable passive noise reduction and airflow guiding mechanism, and a coordinated controller (15); characterized in that: It also includes a load separation support assembly, a dynamic sealing structure, a differential pressure sensor (19), and a feedforward control module; The load separation support assembly includes an air spring (17) arranged in parallel between the floating load-bearing platform (9) and the integrated box-type main frame (1) and the array-type active vibration damping assembly; the air spring (17) is used to bear the static load of the unit, and the active vibration damping assembly is used to output dynamic reverse counteracting force; The dynamic sealing structure includes a labyrinth-type sealing rubber curtain (18) installed in the gap between the floating bearing platform (9) and the side wall of the integrated box-type main frame (1). The input terminal of the feedforward control module is electrically connected to the variable frequency drive of the air-cooled heat pump unit to read the compressor operating frequency and output the feedforward vibration suppression command; the feedback input terminal of the cooperative controller (15) is connected to a vibration sensor (13). The differential pressure sensor (19) is installed inside the impedance composite silencing duct (3) and is electrically connected to the coordinating controller (15). The coordinating controller (15) has a built-in differential pressure safety protection logic. When the duct differential pressure exceeds the preset threshold, it forcibly limits the minimum opening of the adjustable silencing guide plate (4) to no less than 45°.

2. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: The collaborative controller (15) has a built-in soft-start pre-tightening logic module, which is used to drive the active vibration damping assembly to output pre-tightening force 0.5s~1s before the air-cooled heat pump compressor starts, and establish initial balance.

3. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: The integrated box-type main frame (1) has an independent forced convection heat dissipation duct (20) on its side wall corresponding to the installation area of ​​the electromagnetic active actuator (8). The heat dissipation duct (20) is physically isolated from the sound-absorbing inner cavity (2).

4. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: The impedance composite silencing duct (3) is also equipped with an active silencing speaker array (21). The collaborative controller (15) drives the speaker to emit anti-phase sound waves for active noise reduction based on the noise frequency collected by the noise acquisition unit (14).

5. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: The two-stage passive vibration damping assembly includes a primary passive vibration damper (6) and a secondary damping buffer strip (10); the primary passive vibration damper (6) is supported and arranged between the bottom of the integrated box-type main frame (1) and the foundation; the secondary damping buffer strip (10) fills the gap area between the floating bearing platform (9) and the integrated box-type main frame (1).

6. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: The integrated box-type main frame (1) is equipped with a load-bearing partition (7) inside; the array-type active vibration damping assembly includes several electromagnetic active actuators (8); the lower end of the electromagnetic active actuator (8) is fixed to the load-bearing partition (7), and the upper end is rigidly connected to the floating bearing platform (9).

7. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 6, characterized in that: The electromagnetic active actuator (8) is divided into a compressor array actuator and a fan auxiliary actuator; the compressor array actuator is arranged in the area directly below the air-cooled heat pump compressor; the fan auxiliary actuator is arranged in the area below the axial flow fan bracket of the unit.

8. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: A guide and limit assembly (11) is provided between the floating load-bearing platform (9) and the integrated box-type main frame (1); the guide and limit assembly (11) includes a guide column and a polyurethane buffer limit sleeve, and a set floating gap is reserved between the floating load-bearing platform (9) and the buffer limit sleeve.

9. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: The integrated box-type main frame (1) has pipeline through holes on its side plate, and a flexible sealing sleeve (12) is installed at the pipeline through hole.

10. The active vibration reduction and passive noise reduction coordinated control device for an air-cooled heat pump unit according to claim 1, characterized in that: The adjustable passive noise reduction and flow guiding mechanism includes an adjustable noise reduction and flow guiding plate (4) and a servo drive mechanism (5) for driving the flow guiding plate to swing. The adjustable noise reduction and flow guiding plate (4) can rotate within the angle range of 0° to 90° and is limited by the differential pressure safety protection logic, and its minimum working opening is limited to not less than 45°.

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