Control method for air source heat pump unit system and air source heat pump unit system
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Solution Overview
Problem
Air source heat pump unit systems face issues of high operating energy consumption and poor room comfort due to fluctuations in outdoor temperatures and room loads, leading to frequent frosting, false defrosting, and unstable operation.
Innovation Solution
A control method that adjusts the supply and return water temperatures and circulating water volume of the air source heat pump unit system by monitoring room temperature deviations, ensuring the temperature difference between supply and return water remains constant, and reducing water temperatures and volumes when necessary to match changing room demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the air source heat pump unit system is selected based on maximum heat load under designed working condition, then the heating capacity is sufficient, but the energy efficiency becomes low
Solution Approach 1:
The patent implements dynamic adjustment of supply water temperature and circulating water volume based on real-time room temperature deviation and outdoor temperature conditions. The system transitions from static maximum capacity operation to dynamic adaptive operation, matching the heat pump output to actual room load requirements, thereby improving energy efficiency while maintaining sufficient heating capacity.
Solution Approach 2:
The patent changes key operating parameters (supply water temperature, return water temperature, circulating water volume) based on outdoor temperature and room load conditions. By adjusting these parameters dynamically rather than operating at fixed maximum settings, the system achieves better energy efficiency while maintaining adequate heating capacity.
2Use of energy by moving object
If the outdoor temperature condition improves and room load reduces, then the energy consumption decreases, but frequent frosting and false defrosting occur
Solution Approach 1:
The patent employs feedback control by continuously monitoring room temperature deviation and outdoor temperature conditions, then adjusting supply water temperature and circulating water volume accordingly. This closed-loop control prevents frequent frosting and false defrosting by adapting the system operation to actual thermal conditions, maintaining reliability while managing energy consumption.
Solution Approach 2:
The patent performs preliminary adjustment of supply water temperature before frosting conditions occur by monitoring outdoor temperature trends. When outdoor temperature improves and room load reduces, the system proactively adjusts operating parameters to prevent frosting and false defrosting cycles before they occur, ensuring stable operation.
3Use of energy by moving object
If the supply water temperature is reduced to match room load, then the energy efficiency improves, but the temperature difference between supply and return water fluctuates
Solution Approach 1:
The patent dynamically adjusts both supply water temperature and circulating water volume together to maintain stable temperature difference. Rather than adjusting supply temperature alone, the system coordinates both parameters to match room load changes, improving energy efficiency while maintaining temperature difference stability between supply and return water.
4Temperature
If the unit operates at high capacity to ensure room temperature, then the heating performance is good, but the operating energy consumption increases
Solution Approach 1:
The patent changes operating parameters (supply water temperature, return water temperature, circulating water volume) based on actual room temperature deviation from target and outdoor temperature conditions. By adjusting these parameters to match actual heating needs rather than operating at fixed high capacity, the system maintains good room temperature performance while reducing operating energy consumption.
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
Reduces operating energy consumption, improves system efficiency, minimizes energy waste, and enhances room comfort by stabilizing system operation and reducing frequent start-stop cycles.
Implementation Method 1
air source heat pump unit system
Implementation Method 2
circulating water volume
Data Source
Figure 1
Figure 2
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AI summary
Disclosed are a control method for an air source heat pump unit system and an air source heat pump unit system. In the control method for an air source heat pump unit system, the supply water temperature of the air source heat pump unit system is controlled by monitoring a change in actual demand at an end, so that the operating energy consumption of the air source heat pump unit system is reduced.