Household oxygen generator housing | Supporting project for household oxygen therapy equipment housing

1. Project background

The client is a national high-tech medical device enterprise specializing in the research, development, and manufacturing of household respiratory oxygen therapy equipment. Its core product is a household oxygen generator, which is used for home oxygen therapy and respiratory assistance for chronic diseases. The oxygen generator requires long-term uninterrupted operation, and the interior of the housing accommodates core components such as compressors, molecular sieves, fans, and humidification tanks. The housing needs to be reserved with ventilation and heat dissipation holes, and the shell needs to be regularly wiped clean with alcohol or disinfectant wipes. The client's original housing is a large plastic part, which is prone to warping, shrinkage, and deviation in ventilation hole positions during injection molding, resulting in poor heat dissipation of the entire machine. The chemical resistance of ordinary raw materials is insufficient, and after repeated disinfection, the shell turns yellow and the surface cracks. The housing lacks rigidity, and it is prone to deformation during handling and bumping, affecting the stability of the internal air path and molecular sieve.

II. Core pain points of customers

1. The oxygen concentrator housing has a large volume, and injection molding is prone to warping and shrinkage, resulting in uneven assembly gaps between the upper and lower shells;

2. The poor precision in the formation of ventilation and heat dissipation holes leads to obstructed airflow, causing heat accumulation inside the entire machine, which in turn affects the lifespan of the compressor;

3. Ordinary plastic is not resistant to repeated wiping with alcohol or disinfectant, and the shell will yellow and age after long-term use;

4. The design of the shell wall thickness is unreasonable, making it prone to deformation during handling and collision, which may squeeze the internal molecular sieve and gas pipeline;

5. Plastic materials pose a risk of leaching and cannot meet the compliance requirements for materials used in household medical devices;

6. The panel buttons and display screen holes have large tolerances, making assembly difficult.

III. Customized Solutions

1. Low-leaching medical modified engineering plastics are selected, and the harmful substance leaching indicators comply with the material specifications for household medical equipment;

2. Optimize the mold cooling water circuit and injection molding process to address the warping and shrinkage issues of large shells, ensuring uniform assembly clearance between the upper and lower shells;

3. The integrally molded precision ventilation and heat dissipation holes ensure smooth airflow, facilitating heat dissipation of the compressor and reducing the overall operating temperature of the machine;

4. The material formula has been optimized to enhance its chemical corrosion resistance, making it resistant to repeated wiping with alcohol and disinfectant wipes, and less prone to yellowing and cracking;

5. Reinforcing ribs are added to key positions of the shell to enhance overall rigidity, resist impact and collision, and protect the internal molecular sieve and gas path components;

6. Precise control of panel, display screen, and button hole positions ensures accurate assembly alignment and enhances assembly efficiency;

7. Complete high and low temperature, aging, and drop reliability tests.

IV. Project Achievements

• The large shell exhibits stable molding without noticeable warping, with uniform assembly gaps, leading to a significant improvement in assembly yield;

• The ventilation holes are precisely formed, improving the heat dissipation effect of the equipment and supporting long-term continuous oxygen supply;

• The shell has undergone repeated disinfection and wiping without any yellowing or cracking, maintaining a stable appearance over a long period of time;

• The shell is rigid and not prone to deformation during handling or dropping, effectively protecting the molecular sieve and core components of the compressor;

• The material inspection was compliant, and we successfully cooperated with the customer to complete the reliability testing of the entire machine;

• The oxygen generator housing achieves long-term stable and mass supply.

V. Case Summary

Our company can customize large precision injection-molded housings for household oxygen concentrators, using medical-grade compliant materials. These housings incorporate features such as stability for large-part molding, ventilation and heat dissipation, disinfection resistance, and impact resistance, protecting the internal compressor and molecular sieve components. This ensures continuous and stable oxygen supply from the device, providing a reliable housing solution for household oxygen therapy equipment.