Techniques to Make Heat Exchangers Leak Resistant

A heat exchange assembly for HVAC equipment that eliminates the need for multiple refrigerant sensors while maintaining safety. The assembly comprises a mounting frame with a side panel that houses the heat exchange tubes, with each tube having a protruding bending area on the panel surface. A sealing cover is integrated into the panel to enclose the tube's bending area, creating a sealed environment for refrigerant flow between the heat exchange tubes and compressor assembly. This design eliminates the need for separate refrigerant sensors while maintaining the critical safety feature of preventing refrigerant leaks during installation.

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A low-emission safety combined heat and cooling heat recovery system for HVAC applications. The system employs a condensing evaporator operating at low pressure to produce hot water, thereby reducing refrigerant leakage risks and enhancing system reliability. The system integrates a condenser and evaporator in a single unit, with the evaporator operating at low pressure to produce hot water. This design minimizes the risk of refrigerant leakage while maintaining the system's safety features.

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Control method and system for heat exchangers that minimizes liquid spillage while maintaining heat transfer efficiency. The method compares the pressure difference across the heat exchanger's inlet and outlet to determine optimal fan speed. When a liquid baffle is present, the system dynamically adjusts fan speed to maintain the pressure difference while maintaining airflow. This approach reduces fan speed increases to avoid energy waste and maintains optimal heat transfer performance.

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Heat exchanger design that prevents fluid leakage through internal passages by utilizing a novel sealing mechanism. The design incorporates a cylindrical outer casing with a side wall featuring a reinforced sealing mechanism. The sealing mechanism comprises an elastomeric insert that compresses and deforms between the side wall and the heat exchanger, effectively blocking fluid leakage through the internal passages. This design provides a reliable barrier against fluid leakage while maintaining heat transfer efficiency, particularly advantageous for applications requiring precise fluid flow control.

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Air conditioning system that prevents refrigerant leaks in the indoor heat exchanger while maintaining safety. The system features a refrigerant detection device integrated into the indoor heat exchanger, which continuously monitors refrigerant flow through the heat exchanger. When a leak is detected, the system automatically activates a refrigerant recovery device that captures and recovers the leaking refrigerant. This proactive recovery capability prevents refrigerant accumulation in the room while maintaining system safety.

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Preventing leakage in plate heat exchangers through controlled operation modes. The method involves monitoring the temperature difference between the sealing gasket and the ambient environment, and adjusting the system's operating parameters accordingly. The system maintains a specific operating state when the temperature difference is positive, reduces compressor frequency when the temperature difference is negative, and maintains the current operating state when the temperature difference is zero. This approach prevents refrigerant leakage by controlling the system's response to temperature changes, thereby maintaining system integrity.

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A water source cooling and heating dual-purpose air conditioner integrated machine with a novel waterproof design that prevents water leaks during installation. The machine features a fixed bottom shell with an external drain pipe through a sealing sleeve, a leak-proof box mounted on the bottom shell's outer wall, and an integrated water-absorbing system. The leak-proof box is positioned on the external wall of the bottom shell, with an installation groove providing a secure mounting point. This design eliminates the need for traditional plumb lines and level measurements during installation, making the system more accessible and efficient.

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A split air conditioning system that achieves low-temperature, low-noise, and low-vibration operation through a novel design of connecting pipes. The system features a unique rubber hose connection between the indoor and outdoor heat exchangers, eliminating metal-to-metal connections that can cause resonance and vibration issues. This design enables the system to maintain optimal performance while significantly reducing refrigerant leakage, noise levels, and vibration characteristics compared to conventional split systems.

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Sealed heat exchanger with enhanced side sealing for laboratory applications. The heat exchanger features a sealed outer wall that abuts and seals against the water supply and drainage main pipes, providing airtight protection against gas leakage. This design addresses common issues in laboratory heat exchangers where gas flow through the heat transfer zone can compromise experimental accuracy.

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Air conditioner with enhanced refrigerant recovery and leakage prevention. The system incorporates a flow path switching device that dynamically changes the refrigerant path between the compressor, heat exchanger, and accumulator. This device enables controlled recovery of refrigerant from the heat exchanger to the accumulator, while preventing refrigerant leaks into the room. The system also monitors refrigerant recovery progress and automatically encloses recovered refrigerant in the accumulator and heat exchanger to prevent further leaks.

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A tubular condenser with enhanced sealing and frost prevention features. The condenser features a sealed and insulated connection sleeve between the feed and discharge ends, along with a thermal insulation board with an adhesive layer on one side wall. This design provides improved sealing and insulation at the condenser joints, significantly reducing frost formation and leakage. The connection sleeve ensures tight seal between the feed and discharge ends, while the thermal insulation board with adhesive layer enhances thermal performance and prevents condensation.

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A usage-side air-conditioning apparatus with integrated refrigerant leakage detection and management system that prevents refrigerant leaks from the air-conditioned space while maintaining air circulation. The apparatus features a heat exchanger for cooling or heating air within the casing, an air supply/exhaust mechanism to take in room air or outdoor air, and a refrigerant detection system that monitors refrigerant levels. When a leak is detected, the system automatically initiates a controlled refrigerant exhaust operation to remove the leaked refrigerant while maintaining air circulation. The system can be integrated with a heat exchanger that connects to the heat source-side air-conditioning apparatus, enabling continuous refrigerant flow while preventing refrigerant leaks.

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A detection mechanism for preventing refrigerant leakage from a fan coil in an air conditioning system. The mechanism includes a fan coil with a waterproof base containing a refrigerant collection system, an immersion probe at the bottom of the base, and a control board that monitors the probe's signal. When the probe detects leakage, it triggers the control board to activate a pressure switch that interrupts refrigerant flow to the fan coil.

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Air conditioning connecting tube assembly for an air conditioner that prevents condensation on the connecting pipe surface while reducing energy losses through the refrigerant. The assembly comprises an insulating pipe, a connecting pipe, and a waterproof layer with a sealing portion that can be opened for insertion or removal. The sealing portion features a cut-out area that can be sealed to prevent moisture contact with the heat-retaining tube. The assembly incorporates a heat-retaining tube with a sealing portion that protects the outer surface of the heat-retaining tube from moisture while maintaining the connection integrity.

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A heat pump water machine module that prevents water from entering the cooling medium system through a novel configuration of intercooling and leakage detection. The module incorporates a water cooling heat exchanger and a wind cooling heat exchanger with an electronic throttle assembly between them. The system features a four-way valve that controls the flow of cooling medium between the heat exchangers. When the cooling medium concentration exceeds a predetermined threshold, the valve automatically closes the flow path, preventing water from entering the system. This design ensures safe operation by preventing compressor bypasses through the cooling medium pipeline.

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A refrigeration system that maintains low-pressure refrigerant in the utilization-side circuit through controlled expansion valve operation. The system features a refrigerant circuit with multiple utilization-side circuits connected in parallel, where the heat source-side circuit has a single expansion valve connected to liquid ends of the utilization-side circuits. A control section monitors the utilization-side circuit pressure and adjusts the expansion valve opening to maintain refrigerant pressure above atmospheric pressure. This configuration prevents refrigerant leaks while maintaining optimal system performance.

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