Encapsulation of components and a low energy circuit for hazardous locations
AssigneeHoffman Enclosures, Inc.
InventorsScott Dean Stammer, La Her, William Martin
Life of this patent
Estimating the term…
Abstract
Embodiments of the disclosure provide an encapsulated compressor overload, an encapsulated compressor relay start, an encapsulated head pressure control switch and a wiring diagram for a circuit for air conditioning units which prevent gases from being ignited by means of encapsulating sparking components, use of solid-state switching devices, and/or wiring circuits in such a way that open contacts do not contain enough energy to produce a spark capable of igniting the atmosphere.
Claims16
A compressor overload for use with air conditioning or refrigeration systems in a hazardous location where flammable gases or vapors may exist, comprising:
- a thermal sensor;
- at least one overload terminal;
- a base bracket;
- a disc;
- at least one wire configured to attach to the at least one overload terminal;
- and
- encapsulation material wherein the encapsulation material forms an air tight cover surrounding the compressor overload.
A compressor start relay for use with air conditioning or refrigeration systems in a hazardous location where flammable gases or vapors may exist, comprising:
- at least one relay terminal;
- at least one wire coupled onto the at least one relay terminal;
- and
- encapsulation material wherein the encapsulation material forms an air tight cover completely surrounding the compressor start relay.
A wiring circuit for air conditioning or refrigeration systems in a hazardous location where flammable gases or vapors may exist, comprising:
- a compressor;
- a transformer;
- a high energy circuit;
- a low energy circuit;
- a solid state relay wherein a first portion of the solid state relay is configured to connect to the high energy circuit and a second portion of the solid state relay is configured to connect to the low energy circuit;
- and
- a line voltage.
Dependencies are inferred from the claim text.