HVAC line set analyzing and charging system

An automated HVAC line set analysis and charging system integrates inert gas purging, volume measurement, leak testing, and refrigerant charging, addressing inefficiencies in conventional methods by ensuring accurate and environmentally friendly HVAC installation and servicing.

US20260185754A1Pending Publication Date: 2026-07-02MALHACK TOOL DESIGN LLC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MALHACK TOOL DESIGN LLC
Filing Date
2026-02-23
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Conventional HVAC installation and servicing processes involve multiple separate tools and manual procedures, leading to errors, environmental concerns, and inefficiencies in purging, leak testing, vacuum evacuation, and refrigerant charging, particularly due to the challenges of integrating these functions into a unified apparatus.

Method used

An automated system with a unified valve-controlled fluid pathway architecture that integrates inert gas purging, volume measurement, leak testing, vacuum evacuation, and refrigerant charging, utilizing electronically controlled valves and a controller to streamline these processes.

Benefits of technology

The system reduces errors and environmental impact by providing a seamless integration of HVAC line set analysis and charging functions, ensuring accurate volume measurement, leak detection, and proper refrigerant charge, while maintaining a controlled environment during brazing and evacuation.

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Abstract

A system for analyzing and charging an HVAC line set is provided herein. The system includes an input connector configured to receive pressurized gas from an external source, an HVAC high port and an HVAC low port configured to connect to high-pressure and low-pressure sides of the HVAC line set, respectively, and a reference volume chamber fluidly connectable to the HVAC ports. The system further includes electronically controlled valves configured to selectively establish fluid pathways between the input connector, reference volume chamber, HVAC ports, and a vent, a vacuum connection configured to connect to a vacuum pump, a precision pressure sensor configured to measure pressure within the system, and a controller. The controller is configured to operate the valves in a purge mode, measurement mode, leak test mode, vacuum mode, and charge mode.
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