Air conditioning system
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Solution Overview
Problem
In air conditioning systems with refrigeration cycles, the performance determination process is not appropriate when multiple types of thermostats are connected, as existing techniques fail to account for differences in thermostat types, leading to hampered performance determination due to varying command signals.
Innovation Solution
An air conditioning system with a refrigeration cycle apparatus, a connection unit, and a communication unit that performs different performance determination processes based on the type of thermostat connected, adjusting the method of using information received from the thermostat to ensure appropriate performance assessment regardless of the thermostat type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single performance determination process is used for multiple thermostat types, then the system structure remains simple, but the performance determination becomes inappropriate when certain thermostat types are connected
Solution Approach 1:
The system dynamically switches between different performance determination processes based on the detected thermostat type. The control unit identifies whether a first type or second type thermostat is connected and selects the appropriate determination process accordingly, making the system adaptive rather than static.
Solution Approach 2:
The system changes the parameters of the performance determination process based on thermostat type. Different determination processes are executed with different parameters depending on which thermostat type is detected, allowing appropriate performance assessment for each thermostat variant.
2Device complexity
If a single method for using thermostat information is used at all times, then the control logic remains simple, but the performance determination process is hampered by thermostat commands during determination
Solution Approach 1:
The system applies different control strategies during different time periods. During the performance determination process, the system uses a first control method that prevents thermostat commands from interfering with determination. During non-determination periods, a second control method is used that normally responds to thermostat commands.
Solution Approach 2:
The control method dynamically changes based on the operational state of the system. The control unit detects whether the system is in a performance determination state or normal operation state and adjusts the information usage method accordingly, ensuring accurate determination while maintaining normal control functionality.
Data Source
AI summary
An air conditioning system includes an air conditioning apparatus, and a controller. The air conditioning apparatus performs air conditioning of an air-conditioning target space. The controller is connectable to a plurality of types of thermostats. The controller performs communication with the thermostat connected thereto. The controller performs a performance determination process for the refrigeration cycle apparatus. The controller performs different performance determination processes according to whether a first type of thermostat is connected thereto unit or whether a second type of thermostat is connected thereto. Alternatively, the air conditioning apparatus changes a method for using information received by the controller from the thermostat according to whether being in a determination processing time over which the performance determination process is performed or in a non-determination processing time over which the performance determination process is not performed.