Uniform Refrigerant Distribution in HVAC Evaporator Coils

A heat exchange system that optimizes capillary distribution within a building through a novel network topology. The system comprises multiple capillary units connected in a hierarchical arrangement, each featuring a refrigerant pipe segment, a liquid separator, and a capillary network. The network's structure allows for precise control over liquid distribution and separation, while the hierarchical arrangement enables adaptive distribution across different areas. This configuration enables optimal temperature uniformity throughout the space, addressing common issues associated with traditional capillary networks.

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Air conditioner with optimized refrigerant distribution through a novel compressor design. The compressor features a unique configuration where the refrigerant flows through a series of concentric tubes, with each tube having a different cross-sectional area. This design enables the compressor to maintain uniform refrigerant flow rates across all tubes, eliminating the uneven distribution typically associated with conventional compressor configurations. This uniform flow ensures consistent heat transfer performance throughout the refrigerant circuit.

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Indoor unit with high energy efficiency ratio and an air conditioner having the indoor unit, which enables optimal heat transfer between indoor and outdoor environments through controlled refrigerant temperature management. The indoor unit features parallel connections of multiple heat exchangers, each with vaporization tubes that precisely regulate refrigerant temperature at the outlet. This configuration ensures consistent refrigerant temperature across all heat exchangers, thereby maximizing overall heat transfer efficiency.

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Heat exchanger and air conditioning indoor unit for improved uniformity of outlet air temperature. The heat exchanger features a heat exchanger main body with refrigerant branch inlet pipes connected to the main body, where the branch pipes are arranged along the height direction of the main body. Each branch pipe has a different diameter. The indoor unit incorporates this heat exchanger into its design, enabling precise control over the refrigerant flow distribution across the unit's air outlet.

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Air conditioning indoor unit design that improves uniform refrigerant distribution through a novel connector system. The design features a tee-shaped connector with a blind tube that prevents centrifugal force from disrupting refrigerant flow patterns. The blind tube is positioned at a minimum distance of 2 mm from the second circulation channel, ensuring sufficient static stability. This configuration enables uniform refrigerant distribution across the indoor heat exchanger, particularly in applications where conventional designs may experience uneven flow due to centrifugal separation.

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Control method for evaporator and air conditioner that improves evaporator performance by optimizing branch liquid distribution. The method monitors refrigerant temperature and compressor inlet air temperature across multiple evaporator branches, then dynamically adjusts fan speed based on the temperature gradients between branches. This approach prevents fan speed increases that can cause localized liquid separation issues and maintains consistent flow across all branches.

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A refrigeration system with improved evaporator uniformity through a novel heat transfer design. The system incorporates a unique heat transfer configuration where the evaporator's heat exchanger is divided into three sections: a first section with a smaller diameter, a second section with a standard diameter, and a third section with an expanded diameter. This configuration enables the first section to maintain higher temperatures while the second and third sections gradually transition to standard diameters, ensuring uniform heat transfer across the entire evaporator.

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Control method and device for air conditioners that improves refrigerant distribution and heat transfer efficiency through a novel expansion valve strategy. The method involves dynamically adjusting the expansion valve opening to optimize refrigerant flow distribution between evaporator branches. By increasing the expansion valve opening when the branch temperature difference between inlet and outlet exceeds a predetermined threshold, the method enhances the evaporator's heat transfer capacity while preventing excessive refrigerant flow into the shunt. This approach ensures more uniform refrigerant distribution between evaporator branches and maintains optimal subcooling conditions in the condenser.

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A distributor for heat exchanger assemblies that ensures uniform liquid distribution across multiple branch pipes by using a novel flow equalization mechanism. The distributor comprises a body with a cavity, inlet and outlet pipes connected to it, and a flow equalization piece with a cavity. The flow equalization piece includes a rotating gear that controls gas flow between branch pipes. The gear is positioned in a chamber that communicates with the branch pipes, and it ensures that only gas can flow between the branch pipes, thereby maintaining uniform distribution across all pipes.

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Liquid separator, heat exchanger, refrigeration cycle system, and air conditioner that enables precise refrigerant distribution between branch pipes through controlled flow rate variations. The separator incorporates a unique confluence design where the first liquid branch pipe communicates obliquely with the separator housing, allowing gravity-driven separation of refrigerant streams. This differential flow rate between branch pipes enables precise control over refrigerant distribution, particularly in systems requiring precise temperature control.

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Evaporator design improves heat transfer efficiency by creating balanced heat exchange paths through a novel configuration. The evaporator features a three-pass loop system with a unique configuration where the first and second loops are connected to form a single heat exchange path, while the third loop is a separate path. This configuration ensures that the refrigerant temperature difference between the two loops is minimized, resulting in improved heat transfer performance across the entire system.

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A refrigeration system with improved heat exchanger uniformity and efficiency through a novel distributor design. The system incorporates a distributor with a backflow chamber that modifies the refrigerant flow path through the heat exchanger, enabling precise control over refrigerant distribution across multiple tubes. This backflow chamber enhances mixing uniformity by introducing a controlled flow of refrigerant from the back of the heat exchanger, while maintaining the flow path through the main chamber. The design enables the system to achieve optimal refrigerant distribution while maintaining heat transfer efficiency, particularly in applications requiring precise temperature regulation.

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A refrigerant distribution system for heat exchangers that enhances performance under low-load conditions. The system comprises a heat exchanger with a unique distribution chamber configuration that enables efficient vapor-liquid phase distribution. The chamber features a separate liquid flow path and a gas flow path that are positioned at a distance from each other. This design allows the vapor phase refrigerant to separate from the liquid phase refrigerant, while maintaining continuous flow through the gas-liquid separation chamber. The system is particularly effective in applications where the refrigerant flow rate is slow, such as during low-load operation.

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Air conditioning system that optimizes refrigerant distribution across parallel heat exchangers through dynamic temperature control. The system comprises an indoor unit with multiple heat exchangers connected in parallel, each with its own control device comprising a throttling device and controller. The controllers monitor the heat exchanger temperatures and adjust the throttling device opening in real-time based on the temperature signals, ensuring precise matching of refrigerant flow rates to wind speeds at each heat exchanger location. This enables optimal heat transfer while maintaining system reliability and energy efficiency.

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A falling film evaporator for refrigeration systems that achieves higher heat transfer efficiency through optimized heat exchange geometry. The evaporator design incorporates a novel, multi-stage configuration that enables complete coverage of the heat transfer surface, eliminating the limitations of traditional single-stage designs. This multi-stage approach enables improved heat transfer characteristics, particularly in applications requiring high heat capacity.

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A method and device for optimizing refrigerant flow distribution in multi-flow evaporators to enhance performance and efficiency. The method measures outlet temperatures and superheats across multiple refrigerant paths, then adjusts flow rates based on path-specific superheat levels. This approach ensures uniform refrigerant temperature distribution across all paths, maximizing latent heat utilization and maintaining system performance under variable operating conditions.

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A liquid distributor for air conditioners that enhances uniform refrigerant distribution by creating a swirling flow path through a specially designed body. The distributor features a main body with multiple swirling channels that connect to a liquid inlet and mixing structure. This design enables the refrigerant to rotate and tumble through the mixing chamber before being divided into multiple streams, significantly improving the mixing process and preventing stratification. The swirling flow path promotes uniform distribution of the refrigerant across the air conditioner's output, leading to improved performance and reduced stratification issues.

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Air conditioner with uniform refrigerant flow through microchannel heat exchangers. The design improves refrigerant distribution by optimizing flow transitions between the separator, gas pipe, and liquid pipe, ensuring consistent refrigerant flow through the heat exchanger. This enables enhanced heat transfer efficiency and uniform refrigerant distribution across multiple heat exchanger sections.

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Heat exchange pipeline for air conditioning systems that optimizes capillary tube distribution and liquid separation through a novel network architecture. The pipeline comprises multiple capillary units with interconnected liquid distribution sections, where each unit includes a refrigerant pipe section, a dispensing head, and a capillary network. The network is designed to distribute refrigerant across the capillary network through a series of interconnected sections, while maintaining uniform liquid distribution across the capillary network. This configuration enables improved heat transfer performance and uniform floor temperature through optimized capillary tube distribution.

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Air conditioner control method that improves evaporator distribution efficiency through a novel branch configuration. The method employs a refrigerant main pipe, two branch pipes, and flow valves to create a network of interconnected branches that selectively control refrigerant flow between the evaporators. The control system monitors outlet pressures from both branch outlets and dynamically adjusts the flow valves to optimize refrigerant distribution between the evaporators, thereby achieving more uniform heat transfer.

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