Downward Air Type Cookers: These models were initially inspired by imported designs but have been adapted to suit Chinese cooking preferences. They enhance both the heat output and the burners to meet local culinary demands. Traditional foreign models often require opening the cabinet or relying on its gaps to supply secondary air for combustion. This approach also helps vent any gas leaks or emissions during ignition, though they tend to have a smaller heat load. However, many domestic users aren’t aware of the need to open the cabinet, leading to incomplete combustion. This results in issues like yellow flames and higher concentrations of carbon monoxide. In extreme cases, significant gas leaks could lead to dangerous ignitions or explosions, potentially causing the glass panels to shatter.
Air Intake Type Appliances: To address the drawbacks of the previous design, these cookers elevate the burners above the countertop level. The idea is to allow air to flow in through the gap between the burner and the drip tray. Unfortunately, once the flame creates a hot zone, the surrounding cold air heats up and expands, making it difficult for fresh air to reach the burner head. Consequently, secondary air is still not adequately supplied, and problems such as yellow flames and elevated carbon monoxide levels persist. With this structural design, the thermal load must remain moderate—anything over 3.06 kWh tends to produce strong but inefficient yellow flames. This setup also lowers thermal efficiency and fails to align with the Chinese preference for robust flames. While raising the burner does decrease the likelihood of glass panel bursts, it compromises the overall aesthetic appeal of the appliance.
Side Inlet Type Cookers: This model introduces an air inlet positioned in the cooler areas of the panel. When combustion occurs, it creates negative pressure inside the cabinet, drawing cold air into the unit via the air inlet. This ensures sufficient primary and secondary air for combustion, significantly reducing the occurrence of yellow flames and lowering carbon monoxide levels. Any leaked gas can also escape through this inlet, minimizing risks during ignition. Even in the event of a gas leak igniting and causing a deflagration, the airflow through the inlet expels gases quickly, reducing internal pressure and preventing the glass panel from rupturing. Additionally, the influx of cold air cools the countertop glass considerably. These stoves can achieve a thermal load of up to 3.8 kW, offering a more balanced and efficient cooking experience.
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