Heat recovery air conditioner hot water system and refrigerant flow control method thereof
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Solution Overview
Problem
Current heat recovery air-conditioning hot water systems are complex and difficult to install, and lack effective methods for controlling refrigerant flow, leading to unstable operation and reduced reliability.
Innovation Solution
A heat recovery air-conditioning hot water system incorporating a compressor, condenser, heat exchangers, throttling devices, and reversing valves, with a refrigerant flow control method that uses temperature detection to adjust the opening degrees of throttling devices for flexible operation in multiple modes, ensuring stable and reliable refrigerant distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the heat recovery air-conditioning hot water system uses multiple reversing valves and throttling devices to enable flexible operation in multiple modes, then the adaptability and heat recovery function are improved, but the device complexity and installation difficulty increase
Solution Approach 1:
The system employs multiple reversing valves (first and second reversing valves) and throttling devices that enable the same hardware configuration to perform multiple functions across different operating modes including pure cooling, pure heating, pure water heating, cooling and water-heating, and heating and water-heating modes. This multi-functionality approach allows the system to achieve high adaptability without adding separate dedicated systems for each mode, thereby managing complexity while enhancing versatility.
2Reliability
If the system lacks effective refrigerant flow control methods, then the device complexity is reduced, but the reliability and operational stability deteriorate
Solution Approach 1:
The patent implements refrigerant flow control through feedback mechanisms where the controller monitors system parameters and adjusts the opening degrees of the first and second throttling devices accordingly. This feedback-based control ensures stable and reliable refrigerant distribution across different operating modes, improving system reliability while maintaining manageable complexity through automated control rather than complex mechanical designs.
3Productivity
If the water-side heat exchanger is connected via water-side high-pressure air pipe to provide high-temperature high-pressure gaseous refrigerant, then the water heating efficiency is improved, but the risk of frost crack to the water module increases
Solution Approach 1:
The system utilizes parameter changes by controlling the refrigerant state through the water-side high-pressure air pipe connection, transforming the refrigerant into high-temperature and high-pressure gaseous state to maximize water heating efficiency. The controller manages the thermal parameters and pressure levels to optimize heating performance while implementing protective measures to prevent frost crack damage to the water module, thus balancing productivity improvement with harm prevention.
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 enables flexible operation in various modes, including cooling and heating, while ensuring effective water heating and preventing frost cracks, with improved installation ease and system stability.
Implementation Method 1
a heat recovery air-conditioning hot water system includes a compressor, a condenser, heat exchangers
Implementation Method 2
a first throttling device, a second throttling device... the first throttling device and the second throttling device are used to control the refrigerant flow of the system
Implementation Method 3
the first reversing valve is used to control the refrigerant switching of the indoor heat exchanger, so as to realize the switching of cooling and heating modes
Implementation Method 4
a compressor... an exhaust pipe of the compressor is respectively connected to the first reversing valve, the second reversing valve, and a water-side heat exchanger
Data Source
AI summary
A heat recovery air-conditioning hot water system and a refrigerant flow control method therefor. The heat recovery air-conditioning hot water system includes a compressor, a condenser, heat exchangers, an indoor unit, a first throttling device, a second throttling device, a first reversing valve, and a second throttling device, wherein the first reversing valve is used to control the refrigerant switching of the indoor heat exchanger, so as to realize the switching of cooling and heating modes; the second reversing valve is used to control the refrigerant switching of the outdoor heat exchanger, so as to realize the operation switching of cooling and heating modes of the outdoor heat exchanger; and an exhaust pipe of the compressor is respectively connected to the first reversing valve, the second reversing valve, and the water-side heat exchanger by means of a water-side high-pressure air pipe.