Controller, outdoor unit, heat source apparatus and air conditioning system
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Solution Overview
Problem
Conventional indirect air conditioning systems face challenges in ensuring comfort and energy conservation during start-up, as the optimal preliminary operation time varies with heat capacity, pipe length, and temperature, making fixed time periods ineffective.
Innovation Solution
A controller calculates the heat capacity of the second heat medium and determines a preliminary operation time period based on the heat storage amount, starting the heat source or cold source before the set operation start time of the fan to ensure comfortable air delivery from the beginning of installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed time period of preliminary operation is used, then the control system is simple, but comfort and energy conservation cannot be ensured due to variations in heat capacity, pipe length, and temperature
Solution Approach 1:
The preliminary operation time period is dynamically adjusted based on detected temperature and calculated heat storage amount rather than using a fixed time period. The controller calculates the heat capacity of the heat medium and determines the optimal preliminary operation duration based on real-time heat storage conditions, allowing the system to adapt to variations in pipe length, heat capacity, and temperature while maintaining both comfort and energy efficiency
Solution Approach 2:
The system uses temperature detection and heat storage amount calculation as feedback to determine the preliminary operation time period. The controller continuously monitors temperature, calculates heat storage amount based on heat capacity and temperature difference, and uses this feedback information to optimize the preliminary operation duration, ensuring both comfort and energy conservation without requiring complex manual configuration
2Reliability
If the heat source apparatus is started early to ensure comfort, then occupant comfort is improved, but energy consumption increases due to extended operation time
Solution Approach 1:
The system changes the parameter of preliminary operation time period based on calculated heat storage amount. By calculating the actual heat capacity of the heat medium and the current temperature, the system determines the precise amount of heat stored in the pipe, and adjusts the preliminary operation time accordingly. This ensures the heat source apparatus runs long enough to ensure comfort but not excessively long to waste energy
Solution Approach 2:
The system uses its own operational data (temperature detection and heat capacity calculation) to self-determine the optimal preliminary operation time. The controller calculates the heat storage amount based on the heat medium's properties and current temperature, then automatically adjusts the operation timing without external intervention, achieving both comfort and energy efficiency through self-optimization
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 approach improves comfort and maintains energy conservation by accurately calculating the preliminary operation time period, ensuring comfortable air delivery and reducing power consumption.
Implementation Method 1
a second heat exchanger configured to exchange heat between the first heat medium and the second heat medium
Implementation Method 2
a first heat exchanger configured to exchange heat between a second heat medium and indoor air
Implementation Method 3
a pump configured to circulate the second heat medium between the first heat exchanger and the second heat exchanger
Data Source
AI summary
A controller has a timer operation mode in which the operation of a refrigeration cycle that operates as a heat source or a cold source is started before a set operation start time of an indoor fan by a preliminary operation time period. In the timer operation mode, the controller calculates a heat capacity of water or brine, calculates a heat storage amount of a second heat medium from a temperature detected by a temperature sensor and the heat capacity, and determines the preliminary operation time period from the heat storage amount. By determining the preliminary operation time period in this manner, timer operation can be performed such that air at an appropriate temperature is blown from an indoor unit at the operation start time of the indoor fan, from the initial time at which an air conditioning apparatus is installed.