Integrated Heat Pump Piping for Air Conditioning and Water Heating
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Solution Overview
Problem
Existing heat pump systems with integrated air conditioning and water heating functions are complex, costly, and inefficient, with multiple subsystems and complicated pipeline structures that increase maintenance difficulties and reduce user convenience.
Innovation Solution
A heat pump system featuring a compressor, first and second heat exchangers, a heat-recovery-type heat exchanger, multi-way valve, and throttling elements, with a mode-switching flow path that allows for controllable switching between different functional modes such as cooling, heating, heat recovery, and water heating by turning on/off specific flow paths, reducing the number of parts and simplifying pipeline structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple water systems and heat pump systems are integrated to provide both air conditioning and water heating functions, then the system can achieve multiple functional modes, but the device complexity and cost of elements and parts increase significantly
Solution Approach 1:
The patent merges multiple water systems and heat pump systems into a single integrated system. The heat pump system includes a compressor, evaporator, condenser, and multiple heat exchangers (first heat exchanger connected to compressor outlet, second heat exchanger connected to evaporator inlet) that share common refrigerant circulation paths. By using multi-way valves to control refrigerant flow distribution, the system achieves both air conditioning and water heating functions through unified hardware components, thereby reducing device complexity and cost while maintaining multiple functional modes.
Solution Approach 2:
The patent designs heat exchangers and pipelines to serve multiple functions. The first heat exchanger can operate as a condenser for water heating or as part of the cooling circuit. The second heat exchanger can function as an evaporator for air conditioning or as a heat recovery device. The multi-way valve system enables these components to be dynamically reconfigured for different operational modes (cooling mode, heating mode, heat recovery mode, water heating mode), making each component universal rather than dedicated to a single function.
2Adaptability or versatility
If multiple water systems and heat pump systems are integrated to provide both air conditioning and water heating functions, then the system can achieve multiple functional modes, but the pipeline complexity and labor cost increase
Solution Approach 1:
The patent combines multiple pipeline functions into shared refrigerant circuits. The refrigerant circulation system includes a common compressor outlet that branches to both the first heat exchanger and the evaporator through multi-way valve control. The condenser and second heat exchanger share common inlet connections from the evaporator. This merged pipeline structure eliminates the need for separate dedicated pipelines for air conditioning and water heating, reducing installation complexity and labor costs while maintaining full functional versatility.
Solution Approach 2:
The patent employs multi-way valves (first multi-way valve at compressor outlet, second multi-way valve at evaporator inlet) that dynamically redirect refrigerant flow based on operational requirements. These valves enable the pipeline system to reconfigure its topology in real-time, switching between cooling mode, heating mode, heat recovery mode, and water heating mode without requiring physical pipeline changes. This dynamic flow control simplifies the fixed pipeline structure while achieving multiple functional modes.
3Adaptability or versatility
If the system complexity increases with more subsystems, then the functional modes become more comprehensive, but the repairing and maintenance work becomes more professional and difficult
Solution Approach 1:
The patent consolidates multiple subsystems into a unified heat pump system with shared core components (compressor, evaporator, condenser, refrigerant circulation paths). This merging reduces the total number of independent subsystems that require maintenance. The multi-way valve system provides centralized control over refrigerant distribution, making it easier to diagnose and service the system compared to having separate dedicated systems for each function.
Solution Approach 2:
The patent designs universal components that can perform multiple functions, such as heat exchangers that can operate in heating or cooling roles depending on refrigerant flow direction controlled by multi-way valves. This universality means that maintenance personnel only need to service a limited set of core components rather than multiple specialized subsystems, simplifying repair procedures and reducing the need for highly specialized maintenance expertise while maintaining comprehensive functional capabilities.
4Adaptability or versatility
If a heat exchanger is disposed on the compressor outlet pipeline to provide water heating function, then the water heating function is achieved, but the air conditioning performance is affected when only cooling is needed
Solution Approach 1:
The patent uses a first multi-way valve connected to the compressor outlet that dynamically controls refrigerant flow distribution. When water heating is required, the valve directs refrigerant through the first heat exchanger to heat water. When air conditioning is needed, the valve redirects refrigerant flow to bypass the first heat exchanger or route it through the evaporator for cooling. This dynamic flow control ensures that the presence of the water heating heat exchanger does not compromise air conditioning performance, as the system can selectively engage or disengage the heat exchanger from the cooling circuit based on operational demands.
Solution Approach 2:
The patent segments the refrigerant circulation into separate controllable paths using multi-way valves. The first heat exchanger is placed in a dedicated water heating path that can be independently controlled from the air conditioning path. This segmentation allows the water heating function to operate without interfering with the air conditioning function, as each function has its own controllable refrigerant flow path managed by the multi-way valve system.
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
The system enhances functional efficiency, reduces the number of components and costs, and simplifies maintenance by allowing easy switching between modes through controlling multi-way and electromagnetic valves, while maintaining high-performance air conditioning and water heating capabilities.
Implementation Method 1
a compressor
Implementation Method 2
a first heat exchanger, a second heat exchanger, and a heat-recovery-type heat exchanger
Implementation Method 3
throttling elements
Data Source
AI summary
A heat pump system, a controlling method thereof, and a heat pump unit using the heat pump system. The heat pump system includes a compressor, a first heat exchanger, a second heat exchanger, a heat-recovery-type heat exchanger, a multi-way valve, a throttling element, and a mode-switching flow path, which has both air conditioning and water heating functions. By switching the multi-way valve and powering on/off electromagnetic valves in the heat pump system, the controlling method controls the heat pump system to implement multiple functional modes. Furthermore, the heat pump unit using the heat pump system provides multiple functions simply by laying a small amount of parts and elements and pipelines outdoors, thereby greatly reducing the engineering cost and cost of parts, and ensuring a much higher water heating efficiency.