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Zhejiang Yinjia Copper Co., Ltd.
was set up in 2004.

Yinjia was established in 2004 with a registered capital of 55.6 million Yuan, located in the southeast of Zhejiang Province, China, 80KM from Hangzhou and 70KM from Ningbo, our factory covers an area of 24,000 square meters and has 240 manufacturing staff. We have also obtained the "Copper Pipe Production License" issued by the General Administration of Quality Supervision and Inspection of China and passed the ISO9001:2008 international quality management system certification.

As China Air Conditioning U Bends Manufacturers and Factory, Yinjia specializes in the production of precision purple copper tubes, purple copper pipeline components and steel pipe pipeline components. The main products are: copper pipe assemblies, connecting pipes, bellows, silencers, four-way valve pipe assemblies for air conditioners, suction and discharge pipes applied to compressors, high-efficiency copper pipes for heat exchangers, etc. The products we produce are widely used in the air conditioning, refrigeration and heat exchanger industries and are well evaluated by our customers.

In 2014, Yinjia's sales of copper materials reached 1500 tons, and the output of products reached 80 million pieces, with an output value of 28,000,000 RMB. The company takes the market as the guide and strengthens the internal management, reform and innovation, implements 6S management, lean production, constantly restructuring, and improves the quality of products and services. Supply Air Conditioning U Bend Custom

With the tenet of "customer first, quality first", the company is dedicated to providing customers with satisfactory products and considerate services.
  • 24,000

    Plant area

  • 150

    Manufacturing staff

  • 230+


  • 300,000

    Daily output



  • ISO 9001:2015

  • ISO 9001:2015

  • Invention Patent Certification

  • High and New Technology Enterprise Certification

Industry knowledge
What are the key applications and industries where Air Conditioning U Bend are commonly used?
U-bends in air conditioning systems are versatile components used in a variety of applications and industries where heat exchange is a crucial part of the process. 
HVAC Systems: U-bends are widely used in HVAC (Heating, Ventilation, and Air Conditioning) systems, particularly in air conditioning and refrigeration applications. They are integral parts of evaporator and condenser coils, where they facilitate the heat exchange process.
Refrigeration Systems: Air Conditioning U Bend play a vital role in refrigeration systems, such as those used in cold storage, refrigerated display cases, and industrial refrigeration units. They help transfer heat, allowing for efficient cooling and preservation of goods.
Heat Exchangers: Air Conditioning U Bend are found in various types of heat exchangers, including shell-and-tube heat exchangers, where they help transfer heat between different fluid streams. These heat exchangers are used in industries like chemical processing, power generation, and petrochemical.
Automotive Air Conditioning: Air Conditioning U Bend are used in the evaporator and condenser coils of automotive air conditioning systems. They are essential for cooling the air inside the vehicle's cabin and dissipating heat generated by the engine.
Appliances: U-bends are incorporated into domestic appliances like refrigerators, freezers, and air conditioners. They contribute to cooling and maintaining the desired temperature in these appliances.
Industrial Processes: In various industrial applications, U-bends are utilized in heat exchangers to manage temperature and facilitate efficient processes. This includes industries like food and beverage, pharmaceuticals, and chemical manufacturing.
how the Air Conditioning U Bend works
The air conditioning U bend, also known as the U-bend coil or U-bend pipe, is a crucial component in the air conditioning system, specifically in the evaporator coil. It is designed to facilitate the heat exchange process and ensure the efficient cooling of indoor air.
1. Evaporator Coil: The U bend is part of the evaporator coil, which is located inside the indoor unit of the air conditioning system. The evaporator coil contains refrigerant in a low-pressure, low-temperature state.
2. Refrigerant Circulation: The U bend is positioned in the lower portion of the evaporator coil, forming a U-shaped bend in the copper tubing or aluminum fins. The refrigerant flows through the U bend in a continuous loop.
3. Absorbing Heat: As warm indoor air is drawn into the air conditioning unit, it passes over the fins and copper tubing of the evaporator coil. The low-pressure refrigerant inside the U bend absorbs heat from the indoor air, causing the refrigerant to evaporate and turn into a low-pressure, low-temperature gas.
4. Cooling Indoor Air: The process of absorbing heat from the indoor air cools the air. The cooled air is then blown back into the room through the air conditioner's vents, providing a comfortable and cool indoor environment.
5. Condensation and Dehumidification: During the heat exchange process, the U bend causes moisture in the warm indoor air to condense on the cold surface of the evaporator coil. This helps to dehumidify the indoor air, reducing the humidity level and enhancing comfort.
6. Return to Compressor: After absorbing heat from the indoor air, the refrigerant in its gaseous state returns to the air conditioner's compressor through the refrigerant lines. The compressor then pressurizes the refrigerant, raising its temperature and pressure, and sends it to the condenser coil for further heat exchange.
The U bend in the evaporator coil is a critical component that maximizes the surface area for heat exchange with the indoor air. Its shape and location allow for efficient cooling and dehumidification of the indoor air, ensuring that the air conditioning system effectively maintains a comfortable and pleasant indoor environment. Proper maintenance and cleaning of the U bend and the entire evaporator coil are essential to ensure the smooth and efficient operation of the air conditioning system over time.

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