Heat System For Killing Pests

What is this patent about?

’921 is related to the field of pest control, specifically targeting arthropods like bed bugs. Traditional pest control methods often involve discarding infested items, using potentially harmful pesticides, or employing heat treatments that can damage property or are energy inefficient. The patent addresses the need for a safe, effective, and non-destructive method for eliminating pests from infested articles.

The underlying idea behind ’921 is to use a controlled heat treatment within a contained environment to eradicate pests without damaging the treated article. The key is to gradually increase the temperature inside a sealed enclosure to a lethal level for pests, maintain that temperature for a specific duration, and then slowly decrease it. This controlled temperature ramp prevents damage to the article while ensuring complete pest elimination.

The claims of ’921 focus on a pest treatment system and a method for using it. The system includes a flexible enclosure with a volume of at least 50 cubic feet, designed to house items like furniture or mattresses. The system also includes a heating unit with a fan, a temperature sensor inside the enclosure, and a controller. The method involves placing an article inside the enclosure, heating the interior to at least 115°F, and maintaining that temperature for a period of time.

In practice, the system uses a programmable logic controller (PLC) to manage the heating process. The PLC monitors the temperature inside the enclosure via a thermocouple and adjusts the heater output to maintain a pre-set temperature ramp rate and target temperature. This ensures that the temperature rises and falls gradually, preventing damage to sensitive items. The enclosure itself is designed to be flexible and inflatable, making it easy to set up and transport, and is often made of insulated material to improve energy efficiency.

The invention differentiates itself from prior approaches by providing a contained and controlled heating environment. Unlike whole-room heat treatments, this system focuses the heat on the infested article, reducing energy consumption and minimizing the risk of damage to the surrounding environment. The controlled temperature ramp, managed by the PLC, is also a key differentiator, as it allows for the safe treatment of a wider range of articles, including those made of multiple materials that could be damaged by rapid temperature changes. The flexible enclosure also allows for easy setup and portability.