Heat Pump Defrost Controller With Selectable Modes

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Solution Overview

Problem

Existing heat exchange systems face inefficiencies due to ice accumulation on external coils, requiring specific defrost controllers for each manufacturer's system, leading to inventory challenges and limited operability across different systems.

Innovation Solution

A heat pump controller with a computing device and user interface that initiates defrost cycles based on selectable modes, using sensors to determine when to initiate defrosting, and is configurable for different reversing valve energizing modes, allowing operation across various heat exchange systems without manufacturer-specific requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a manufacturer-specific defrost controller is used for each heat exchange system, then the system operates reliably with that manufacturer's specific settings, but inventory complexity increases and versatility across different manufacturers' systems decreases

Engineering Contradiction:

Improvesystem operation reliabilityVSAvoidcontroller compatibility across manufacturers

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The defrost controller is designed with multiple selectable defrost modes (e.g., timed defrost, demand defrost, adaptive defrost) and configurable parameters that can accommodate different manufacturers' system requirements. This universal design allows a single controller model to replace multiple manufacturer-specific controllers, enabling heat exchange systems from different manufacturers to operate reliably with one versatile controller platform.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of repair

If multiple manufacturer-specific defrost controllers are stocked for different heat exchange systems, then each system can be serviced with its original controller type, but inventory costs and storage requirements increase

Engineering Contradiction:

Improveserviceability of heat exchange systemsVSAvoidnumber of different controller types in inventory

Core Design Contradiction:

Ease of repairVSQuantity of substance

Solution Approach 1:

By designing a universal defrost controller that can service multiple manufacturers' heat exchange systems, the inventory requirement transitions from stocking numerous manufacturer-specific models to maintaining a single versatile model. This reduces inventory complexity and storage needs while preserving the ability to service different systems effectively.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The controller incorporates configurable parameters and selectable modes that can be adjusted to match different manufacturers' system specifications. This allows a single physical controller unit to adapt its operational characteristics to serve various heat exchange systems, eliminating the need to stock multiple fixed-configuration controllers.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If a single universal defrost controller is used for all heat exchange systems, then inventory complexity decreases and versatility increases, but the ability to provide manufacturer-specific optimized control may be reduced

Engineering Contradiction:

Improvecontroller compatibility across manufacturersVSAvoidoptimized system performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The defrost controller employs dynamic configuration capabilities where operational parameters, defrost modes, and control algorithms can be adjusted based on the specific heat exchange system being serviced. This dynamic adaptability allows the universal controller to optimize performance for each manufacturer's system while maintaining versatility across different platforms.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The controller allows modification of operational parameters such as defrost cycle timing, temperature thresholds, and sensor configurations to match manufacturer-specific requirements. This parameter adjustability ensures that while the physical controller is universal, its operational characteristics can be optimized for each specific heat exchange system application.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables efficient defrosting and operation in multiple heat exchange systems, reducing inventory needs and enhancing flexibility in servicing and replacing defrost controllers, while improving system efficiency by adapting to different operational conditions.

Implementation Method 1

flow relatively high temperature refrigerant through the external heat exchanger coil and melt the ice accumulated thereon

Methodology Applied

Scientific EffectPhase change (ice to water): Melting

Data Source

PatentUS9964345B2Heat pump controller with user-selectable defrost modes and reversing valve energizing modes

Publication Date: 2018.05.08 COPELAND COMFORT CONTROL LP

AI summary

A heat pump controller for use in a heat exchange system includes a computing device and a user interface coupled to the computing device. The computing device is configured to initiate a defrost cycle based on one of a plurality of user-selectable defrost modes, and the user interface is configured to display the user-selectable defrost modes and receive a user selection corresponding to one of the user-selectable defrost modes.