Adjusting device for thermostatic expansion valves, maintenance system, measuring system and method
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Solution Overview
Problem
Manual adjustment of thermostatic expansion valves in HVAC systems is time-consuming and difficult due to their often inaccessible location, requiring extensive calculations and leading to inefficient superheating adjustments.
Innovation Solution
An adjusting device with a drive, control element, coupling device, and control device that allows for precise, automated adjustment of the preload device, using a detachable coupling to transmit torque and angle information for optimal superheating control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment of the expansion valve is performed using traditional tools, then the adjusting element can be accessed and modified, but the process becomes time-consuming and difficult due to inaccessible location
Solution Approach 1:
A coupling device acts as an intermediary between the adjustable connection on the expansion valve and the drive mechanism. This coupling device includes a coupling element that attaches to the adjustable connection and a control element that transmits rotational movement, enabling precise adjustment without direct manual manipulation of the valve itself
Solution Approach 2:
The patent replaces traditional manual mechanical adjustment with an automated drive mechanism. The drive rotates the control element through a defined angle to adjust the preload force, substituting manual screwdriver or wrench operations with an automated rotational actuation system
2Manufacturing precision
If manual adjustment is performed by HVAC technician, then the expansion valve can be adjusted, but extensive calculations are required and precise adjustment is difficult
Solution Approach 1:
The system incorporates sensors that detect operational parameters of the HVAC system and feed this information back to a control device. The control device processes this feedback and automatically adjusts the drive mechanism to optimize the expansion valve settings, eliminating the need for manual calculations and achieving precise adjustment through closed-loop control
Solution Approach 2:
The system performs self-adjustment of the expansion valve based on sensor feedback and control algorithms. The automated drive mechanism adjusts the preload force without human intervention, allowing the system to optimize its own performance based on real-time operational conditions
3Measurement precision
If automated drive mechanism is implemented, then adjustment precision is improved, but the device complexity increases
Solution Approach 1:
The coupling device is designed with universal applicability to work with different types of adjustable connections on expansion valves. The coupling element can attach to various connection types, and the control element can engage with different adjusting element geometries, allowing one device to perform multiple adjustment functions without requiring separate specialized tools for each valve type
Data Source
AI summary
An adjusting device for adjusting a preload device of an expansion valve in an HVAC system, comprising a drive, a control element rotatable about an axis via the drive, a coupling device, and a control device. The coupling device is detachably coupled to an adjusting connection of the expansion valve so that a tool tip of the control element comes into operative connection with an adjusting element of the preload device and a torque generated by the drive or a rotation triggered by the drive can be transmitted via the control element to the adjusting element. The control device is configured to actuate the drive such that the control element rotates through a defined angle of rotation. A maintenance system is also provided for the maintenance and/or start-up of an HVAC system which can comprise the adjusting device. Provided also is a measuring system and a method for adjusting a preload device of an expansion valve in an HVAC system.