Tongxing Technology

Tongxing's heat exchanger product line covers microchannel and finned-tube structures, widely used in automotive air-conditioning and battery cooling (vehicle and three-electric thermal management) scenarios. Products include parallel-flow microchannel heat exchangers, serpentine microchannel heat exchangers, all-aluminum expanded-tube finned heat exchangers, copper-aluminum finned heat exchangers, all-aluminum inclined-insert finned heat exchangers, all-aluminum small-square finned heat exchangers and other double-pipe heat exchangers, customizable tooling and assembly fixtures per drawings to meet thermal management needs of NEV air-conditioning and battery cooling.

Microchannel flat-tube width W16~60mm, length 200~5000mm, width 200~1500mm; finned tube diameter Phi5~Phi15.88mm, size 100~5000mm, fin pitch 1.5~10mm; material aluminum/copper-aluminum; tooling and fixtures per drawing; eco-friendly and recyclable

• Automotive air conditioning
• Battery cooling
• Vehicle heat pump
• New energy bus
• Three-electric thermal management

Automotive AC piping (NEV air-conditioning system tubes) refers to automotive air-conditioning system pipe assemblies, a core tubing product of Tongxing for automotive AC refrigeration systems, applied in commercial and passenger vehicle AC refrigeration systems. Pipe routing can be laid out per vehicle body, standard diameter F8~F35, and coaxial special-shaped tubes can be produced, featuring economical, reliable and directional-development characteristics, covering NEV passenger cars and NEV buses.

Standard diameter F8~F35mm; coaxial special-shaped tubes can be produced; pipe routing customized per vehicle body; economical, reliable, directional development

• NEV air conditioning
• Commercial vehicle AC
• Passenger vehicle AC
• NEV bus air conditioning

Refrigeration system pipe assemblies is the general term for Tongxing's refrigeration system pipe assembly segment, including automotive AC system pipe assemblies, various small U-bends, etc., applied in commercial vehicle, passenger vehicle AC refrigeration systems and NEV bus scenarios. This segment provides complete piping and pipe-assembly solutions for automotive AC and NEV buses; among them, residential/commercial AC system tubes are non-vehicle lines, listed only for full segment description.

Automotive AC pipe assembly standard diameter F8~F35mm, coaxial special-shaped tubes can be made; small U-bend diameter Phi5~Phi9.52mm, center distance customizable; directional development per vehicle body layout

• NEV bus
• Commercial vehicle AC
• Passenger vehicle AC
• Refrigeration piping

The parallel-flow microchannel heat exchanger adopts aluminum flat tubes and microchannel fin structure, with flow circuits (passes) designed to meet various application needs, featuring anti-fouling and eco-friendly recyclability, serving as Tongxing's core microchannel product for automotive AC condensers/evaporators and battery cooling, also applicable to home appliances and drying.

Flat-tube width W16~60mm; length 200~5000mm; width 200~1500mm; fin wave height and pitch customized per drawing; out-of-range tooling available; material aluminum; eco-friendly and recyclable

• Automotive AC
• Battery cooling
• NEV thermal management
• Home appliances
• Drying

The serpentine microchannel heat exchanger is part of Tongxing's microchannel heat exchanger series, using serpentine aluminum flat-tube layout, with fewer weld points, compact installation space and eco-friendly recyclability, and tooling and assembly fixtures can be configured per different drawings. Suitable for automotive AC condenser/evaporator and NEV battery cooling thermal scenarios.

Flat-tube width W16~60mm; length 200~5000mm; width 200~1500mm; fin wave height and pitch customized per drawing; fewer weld points; material aluminum; eco-friendly and recyclable

• Automotive AC
• Battery cooling
• NEV thermal management
• Home appliances
• Drying

The all-aluminum expanded-tube finned heat exchanger adopts an all-aluminum structure and tube-expansion process, with light weight and eco-friendly recyclability, serving as an important heat exchanger product of Tongxing for bus AC and other vehicle refrigeration scenarios, also suitable for clothes dryers and dehumidifiers. Its lightweight all-aluminum property meets the cost-reduction and energy-efficiency needs of NEV bus AC systems.

Tube diameter Phi7, Phi7.94mm; length 100~5000mm; material all-aluminum; light weight; eco-friendly and recyclable

• Bus AC
• NEV bus
• Clothes dryer
• Dehumidifier

The copper-aluminum finned heat exchanger is the basic series of Tongxing's finned heat exchangers, covering tube diameters F5~F15.88, using flat, corrugated, louver and other fin types, with high and stable heat-transfer efficiency, strong adaptability and broad coverage, serving as a general-purpose condenser/evaporator heat-transfer component for air-conditioning and thermal management systems.

Tube diameter F5~F15.88mm; product size 100~5000mm; fin pitch 1.5~10mm; fin type flat/corrugated/louver; high and stable heat-transfer efficiency

• AC thermal management
• Supermarkets
• Convenience stores
• Unmanned vending
• Kitchen refrigerators
• Heat-pump dryers
• Air dehumidifiers

The all-aluminum inclined-insert finned heat exchanger adopts a single-tube heat-exchange tube structure, with fewer weld points and high reliability, suitable for convenience stores, heat-pump dryers and other fields, and can be extended to compact heat exchange in vehicle AC systems. The all-aluminum material meets lightweight and eco-recycling requirements.

Tube diameter F5.8, F7.94mm; product size 100~800mm; fin pitch multiple of 2.65, 4 or 5mm; fin width 50/60/75/100mm; single-tube structure with fewer weld points

• AC thermal management
• Convenience stores
• Heat-pump dryers

The all-aluminum small-square finned heat exchanger features an attractive structure, reliable quality, wide operating environment and good heat-transfer performance, applied in household refrigerators, freezing and refrigeration, and can serve as a compact heat-transfer unit in thermal management systems. The product supports multi-fin-width assembly to meet different layout needs.

Tube diameter Phi6, Phi7.94mm; product size 180~1600mm; fin pitch multiple of 3/4/5; fin width 30/35/40/50/60/75/80mm assemblable; material all-aluminum

• Thermal management
• Household refrigerators
• Freezing & refrigeration

The other-type heat exchangers cover unconventional-structure products such as double-pipe heat exchangers, using a large tube with one or more small tubes bent inside, featuring compact structure and good heat-transfer performance, applied in ultra-low-temperature medical freezer systems; such special-shaped/custom heat exchangers can also serve NEV scenarios like battery cooling and energy-storage temperature control.

Outer tube diameter F9.52/F12.7/F15.88mm; inner tube diameter F4.76/F6mm; coil inner diameter >=150mm; bending shape customizable; compact structure

• Ultra-low-temp medical freezers
• Battery cooling
• Energy-storage temp control

Various small U-bends are return-bend fittings in Tongxing's refrigeration system pipe assemblies, applied to pipe connections of various tube-type heat exchangers, covering tube diameters Phi5~Phi9.52, with center distance controllable per requirements, featuring small size and reliable quality, serving as key auxiliary parts for automotive AC piping and heat-exchanger manufacturing.

Tube diameter Phi5/Phi7/Phi7.94/Phi9.2/Phi9.52mm; center distance per requirement; small size; reliable quality

• Tube-type heat exchangers
• Automotive AC piping
• Refrigeration pipe assemblies

The Venturi multi-port distributor is a refrigerant distribution component among Tongxing's other refrigeration accessories, using a multi-hole Venturi structure to achieve uniform refrigerant distribution inside evaporators/heat exchangers, improving heat-transfer efficiency, and serving as a core supporting accessory for automotive AC and various heat-exchanger systems.

Multi-hole Venturi structure; uniform refrigerant distribution; customizable per model

• Heat-exchanger refrigerant distribution
• Automotive AC
• Evaporator