Heat Pump Bypass Valve Assembly for Continuous Compressor Operation
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Solution Overview
Problem
Standard heat pump systems face inefficiencies due to cycling between ON and OFF states and waste heat generation, as they either use multiple condensers leading to thermal dump or single condensers that require compressor cycling to prevent overheating, resulting in energy waste and compressor wear.
Innovation Solution
A heat pump system with a variable stage compressor and a bypass valve assembly that allows fluid to bypass the condenser and return upstream to the evaporator, reducing thermal exchange and enabling precise temperature control by adjusting compressor capacity and thermal energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple condensers are used to discharge required heat, then the desired heat output is achieved, but excess heat is discharged to thermal dump resulting in energy waste
Solution Approach 1:
The system divides the condenser function into multiple condensers (first condenser and second condenser) with different roles. The first condenser handles required heat discharge while the second condenser can be isolated from the thermal dump using a bypass passage, allowing selective heat discharge paths to prevent waste heat loss.
Solution Approach 2:
A bypass passage acts as an intermediary element connecting the first condenser to the evaporator, providing an alternative path for refrigerant flow. This mediator allows heat from the first condenser to be recaptured and reused in the evaporator rather than being wasted to the thermal dump.
2Loss of energy
If a single condenser is used to reduce waste heat, then energy efficiency improves, but the compressor must be cycled between ON and OFF states to prevent overheating
Solution Approach 1:
The condenser function is segmented into first and second condensers that can operate independently or together. This segmentation allows the system to distribute heat discharge loads and use bypass passages to recapture heat, eliminating the need for compressor cycling while maintaining efficient heat transfer and preventing overheating.
Solution Approach 2:
The bypass passage enables continuous operation of the compressor by providing a recapture path for heat, allowing the system to maintain steady-state operation without cycling. The compressor can continuously compress refrigerant while the bypass system continuously recaptures and redirects heat, eliminating intermittent ON/OFF cycling.
3Temperature
If compressor cycling is used to prevent overheating, then temperature control is achieved, but compressor utilization becomes inefficient and wear increases
Solution Approach 1:
The system uses dynamic flow control through bypass passages and valves to adjust refrigerant distribution in real-time. This dynamic control allows precise temperature management by varying the amount of heat recaptured and redirected, enabling continuous compressor operation at optimal levels without cycling while maintaining accurate temperature control.
4Power
If multiple condensers are used, then heat discharge capacity is sufficient, but system complexity increases with additional components
Solution Approach 1:
The bypass passage and valve assembly serve multiple functions: they recapture waste heat, control refrigerant flow distribution, prevent thermal dump waste, and enable continuous compressor operation. This multi-functionality allows the system to achieve sufficient heat discharge capacity without proportionally increasing complexity, as single components perform multiple critical roles.
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
This configuration minimizes wasted heat, reduces compressor wear, and achieves precise temperature control with negligible thermal overshoot, optimizing energy transfer and extending compressor lifespan.
Implementation Method 1
manipulating a pressure of a fluid with a variable stage compressor
Implementation Method 2
An evaporator is connected to the fluid flow and disposed upstream relative to the direction of the fluid flow toward the variable stage compressor
Implementation Method 3
A condenser is connected to the fluid flow and associated with an air stream and disposed downstream of the variable stage compressor
Implementation Method 4
A valve assembly is disposed in the fluid flow associated with a bypass passage between an upstream side of the evaporator and an upstream side of the condenser. The valve assembly is operable to allow a portion of the fluid flow directed from the variable stage compressor toward the condenser to be directed upstream of the evaporator to reduce a thermal exchange between the fluid flow and the air stream directed through the condenser
Data Source
AI summary
A heat pump system that can be selectively utilized to discharge excessive heating and cooling capacity toward secondary devices of the system to maintain operation of the heat pump system to better manage the respective temperatures associated with the fluid flows in a manner that reduces the need for cycling the heat pump system ON and OFF to attain desired fluid output temperature manipulations.