Air conditioner blowing temperature estimation apparatus and computer-readable recording medium
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Solution Overview
Problem
Existing air conditioner technologies fail to accurately estimate the blowing temperature from the indoor unit, particularly when the refrigerant piping temperature varies, leading to inaccurate assessments and potential operational issues.
Innovation Solution
An air conditioner blowing temperature estimation apparatus that acquires refrigerant piping and intake temperatures, determines the operating state, and uses pre-set estimation models to estimate the blowing temperature, adjusting for changes in state and detecting abnormalities, with the ability to control operations to maintain a target temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single estimation model is used for all operating states, then the device complexity is reduced, but the measurement precision of blowing temperature estimation deteriorates when refrigerant piping temperature varies
Solution Approach 1:
The patent applies dynamics by making the estimation model adaptive to changing operating conditions. The system dynamically selects or adjusts the estimation model based on the detected operating state (e.g., cooling/heating mode, defrosting, refrigerant piping temperature conditions), allowing the estimation approach to change with system state rather than using a fixed model
Solution Approach 2:
The patent changes parameters by using different estimation models with different parameters depending on the operating state. When refrigerant piping temperature is low, one set of estimation parameters is used; when it is high, another set is used. This parameter adaptation resolves the contradiction by maintaining precision across varying conditions without requiring a single overly complex universal model
2Measurement precision
If the estimation model is switched based on operating state, then the measurement precision is improved, but the stability of estimated value deteriorates due to potential extreme changes during state transitions
Solution Approach 1:
The patent applies beforehand cushioning by preparing transition processing in advance to prevent extreme changes when switching between estimation models. The system detects state transitions and applies smoothing or interpolation techniques before the actual model switch occurs, cushioning against potential discontinuities and maintaining stable estimated values throughout the transition
Solution Approach 2:
The patent uses feedback by continuously monitoring the operating state and the estimated blowing temperature, then adjusting the model selection or parameters based on this feedback. When a state transition is detected, the system uses feedback from recent estimated values to guide the transition processing, ensuring continuity while still adapting to the new operating state for maintained precision
3Temperature
If refrigerant piping temperature is not sufficiently cooled, then the blowing temperature is influenced by intake temperature, but the estimation accuracy deteriorates due to unaccounted thermal effects
Solution Approach 1:
The patent applies parameter changes by detecting the refrigerant piping temperature state and changing the estimation model parameters accordingly. When the piping is not sufficiently cooled, the system switches to a model that accounts for intake temperature influence; when sufficiently cooled, it uses a model that prioritizes refrigerant piping temperature, thus maintaining accuracy across different thermal states
Data Source
AI summary
Including a data acquisition unit (11) that periodically acquires various measured temperatures of a liquid pipe (4), a gas pipe (5), and an intake port from an air conditioner controller (20), an operating state determination unit (12) that determines an operating state of an indoor unit (2) on the basis of the acquired various measured temperatures, a blowing temperature estimation unit (13) that estimates a blowing temperature from the indoor unit on the basis of the acquired various measured temperatures and an estimation model set in accordance with the determined operating state, and a blowing temperature display unit (14) that displays an estimated value of the blowing temperature.