Materials and Techniques for Reducing HVAC Vibrations

Indoor unit for an air conditioner that reduces vibration transmission from the blower to the cabinet and provides space for components like insulators and wiring during installation. The unit has a cabinet with a larger bottom area compared to the sides, and the bottom has steps between forming and unforming sections. This configuration isolates blower vibrations from the cabinet walls and prevents components from touching the bottom. It also allows better airflow uniformity when discharging. The larger bottom area provides space for components and prevents condensation.

Source

Vibration dampers for ventilation devices like residential HVAC systems that reduce vibrations from the fans and motors. The dampers have multiple damping elements to provide soft mounting of the fan unit in axial and circumferential directions. This prevents vibrations from being transmitted through the ductwork. The dampers can have separate damping areas to further control vibration damping in different directions.

Source

Heating, ventilation, and air conditioning (HVAC) terminal unit with improved airflow distribution and noise reduction compared to traditional units. The terminal unit has a sound attenuator positioned opposite the air inlets that directs return airflow into the unit. This balances the airflow distribution to the blowers and reduces noise compared to uneven airflow. The attenuator has an inlet facing the return air inlet and outlet into the unit. Baffles inside the unit further direct the airflow. This balanced airflow reduces blower speeds, pressure losses, and noise compared to uneven flow.

Source

Air guide ring assembly for reducing noise and improving airflow in air conditioners. The assembly has a main body, expanding section, and connecting section forming an air channel. The expanding section has a larger diameter than the main body to increase airflow velocity. An annular bulge on the main body near the connecting section reduces gap between the wind wheel and inner wall. This improves blade tip airflow, reduces vibration, and noise.

Source

Air conditioner with a cover surrounding the compressor and expansion device to reduce noise and vibration. The cover is made of elastic material and has separate body parts for the compressor and expansion device. The body parts can rotate relative to each other to divide the internal space. This allows the cover to enclose the compressor and expansion device without gaps for better noise and vibration isolation. The cover also has partition walls to separate the compressor and expansion device sections further.

Source

A vibration protection system for air conditioner outdoor units that monitors vibrations and stops the compressor if frequencies exceed safe levels to prevent damage to the unit and surrounding structure. The system has modules to monitor vibrations, refrigerant flow, and temperatures. It analyzes vibration sources based on refrigerant flow and temperature data. If vibrations exceed safe levels, it stops the compressor to prevent resonance issues. This prevents compressor faults from causing excessive vibrations that harm the unit and building structure.

Source

An air conditioner outdoor unit frame assembly and an air conditioner that provides improved stability and vibration isolation for the outdoor unit components. The frame assembly has a detachable chassis bracket, lower beam, and entablature above it. The motor is mounted on the lower beam. A guide ring above the motor discharges air. The frame has a connecting beam between the lower and upper beams. This allows the motor vibrations to transfer to the lower beam instead of the chassis. The detachable connections allow component removal for servicing.

Source

Indoor unit for a heating, ventilation, and air conditioning (HVAC) system that reduces noise and vibration compared to conventional units. The indoor unit has a housing with a fan cavity and a diffuser cavity that communicate. The fan is in the fan cavity. A shoulder is added at the end of the air inlet surface that matches a volute tongue surface. This positions the vortex between the fan and the inlet closer to the fan and volute, reducing blockage of the inlet and diffusion cavity. This prevents the vortex from occupying the inlet too much, increasing the effective flow area and reducing channel blockage. This reduces backflow, surge, and noise in the unit.

Source

Flexibly adjustable support structure for air conditioner evaporators that reduces vibration and noise compared to existing designs. The structure has a main bracket with end plates, a front groove, and a shock absorption component. A movable bent rod with a limiting block clamped in a long chute and a fixed bent rod with an arc-shaped end clamped in a limiting groove. This allows vertical adjustment of the evaporator while preventing excessive movement. The shock absorption component reduces vibration transfer. The flexible adjustment and damping improves evaporator performance in air conditioners.

Source

Fan control system for air conditioners with cabinet-style indoor units that uses an annular electrifying device on the fan blades to stabilize motor speed. Permanent magnets are placed on the motor volute. When the fan blades rotate, the annular device contacts brushes to apply force. By adjusting annular device current based on motor speed difference, it changes blade force and loads. This stabilizes motor speed and reduces noise, vibration, and energy consumption compared to unstable motor speeds.

Source

Rotary dehumidifier with adjustable shock absorption to reduce vibration and noise during operation. The dehumidifier body has adjustable feet with ball joints, telescopic rods, and mounting seats. The feet can be extended/contracted to level the dehumidifier on uneven surfaces. The telescopic rods have buffer springs and fluid-filled chambers to absorb vibrations. The adjustable feet and telescopic rods synchronously move when driven by inner components. A mechanism controls the inner components to symmetrically move left and right.

Source

A method to minimize noise and vibration when switching cooling to heating or vice versa in a multi-zone air conditioner system with simultaneous cooling and heating capability. The method involves gradually opening a bypass valve instead of suddenly opening the main valve. This allows the refrigerant to flow slowly and prevent rapid flow issues. It also involves preconditioning the refrigerant temperature to equalize pressure before opening the main valve. This reduces the pressure differential and vibration.

Source

Air conditioner design to improve sealing, prevent insect/mice entry, and reduce vibration and noise compared to conventional designs. The air conditioner shell has a grid structure on the middle frame that allows airflow while preventing debris entry. This replaces the suspended panel and door setup that can have leakage and vibration issues. The grid structure can have vertical holes perpendicular to the frame length. The grid attaches to the base and middle frame.

Source

Simultaneous cooling and heating air conditioner that reduces piping vibration and refrigerant flowing noise when switching between cooling and heating modes. The method involves a controlled transition to prevent large pressure differences across valves. When switching from cooling to heating, the low-pressure expansion valve is closed first, then the high-pressure valve is opened when the internal temperature rises. When switching from heating to cooling, the high-pressure valve is closed first, then the low-pressure valve is opened when the internal temperature drops. This gradual opening prevents large pressure differences that cause vibration and noise.

Source

Reducing noise from compressors in indoor air conditioning units by using a multi-level vibration isolation system. The compressor is mounted on a chassis with two positions. An inner heat exchanger is mounted at the first position. The compressor connects to the inner heat exchanger and has a foot. The compressor is mounted at the second position and the foot connects to the chassis. Between the foot and chassis is a first level of vibration isolation. Between the first level and chassis is a second level of vibration isolation. This two-stage isolation system significantly reduces compressor vibration and noise compared to just foot pads or isolation pads.

Source

Reducing low-frequency vibration and noise in single-rotor compressors of air conditioners by dynamically adjusting compensation currents based on operating conditions. The method involves switching moment and torque compensation coefficients when the compressor runs at low frequency, matching target compensation amounts based on split flow mode and outdoor temp. This adaptive compensation helps restrain vibration at low speeds.

Source

Heat pump design with improved compressor decoupling to reduce vibrations and improve reliability. The compressor and other heat pump components are connected only by the fluid lines and spring elements attached to the housing, rather than rigidly fastening the components together. This allows the compressor to isolate and move slightly during operation, reducing vibrations and stress on the connections.

Source

Air conditioning unit designed to significantly reduce vibration and noise compared to conventional units. The unit uses particle damping vibration absorbers in strategic locations like fan ports, side walls, and the bottom. Additionally, vibration isolators are used at the bottom chassis. This configuration, optimized through vibration analysis, provides improved vibration and noise isolation compared to traditional single-layer vibration isolation. The unit is installed by testing vibrations, modeling, calculating absorber/isolator characteristics, and then installing the optimized components.

Source

Damping assembly for an air conditioner to prevent refrigerant pipes from contacting and vibrating against each other during transportation and operation, reducing noise and improving use comfort. The assembly has a pad with spaced mounting holes for the pipes. Damping members with movable ends are connected to the pad base. Pipes pass through the holes and snap in. This allows the pipes to separate and absorb vibrations when moving. The pad can be fixed to the air conditioner housing.

Source

Air conditioner indoor unit with improved blade design to reduce vibration and noise. The indoor unit has a rotatable blade at the outlet to control airflow. The blade is connected to a motor that generates rotational force. The blade also has a material with restoring force. A buffer member connects the blade and transmission to balance the blade when the unit is not perfectly level. This prevents blade vibration and noise when rotating.

Source