Heating Medium Bypass Control for Simultaneous Space and Water Heating
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Solution Overview
Problem
Conventional heating and hot water supply devices cannot perform simultaneous heating and hot water supply operations efficiently, especially when the heating medium temperature is set low to prevent burns, limiting the operational capacity and region for simultaneous operations.
Innovation Solution
A heating and hot water supply device with a distribution mechanism that adjusts the heating medium distribution ratio between the circulation and bypass passages, allowing the medium to be heated to a higher temperature than the setting temperature during simultaneous operations, thereby increasing the heat supplied and expanding the operational region for simultaneous heating and hot water supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heating medium temperature is set low to prevent burns and maintain equipment durability, then safety and equipment reliability are improved, but the heating capacity and operational region for simultaneous heating and hot water supply operations deteriorate
Solution Approach 1:
The patent implements dynamic temperature control by switching between a first temperature (lower) for heating operations and a second temperature (higher) for hot water supply operations. The control unit dynamically adjusts the heating medium temperature based on the operational mode, allowing the system to optimize between safety and heating capacity for different operational scenarios
Solution Approach 2:
The patent changes the temperature parameter of the heating medium based on operational requirements. By setting different temperature levels for different operations (heating vs. hot water supply), the system expands its operational region and heating capacity while maintaining safety through appropriate temperature selection for each mode
2Productivity
If the heating medium temperature is increased to expand the operational region for simultaneous operations, then heating capacity and productivity are improved, but the risk of burns and equipment durability deteriorate
Solution Approach 1:
The system dynamically adjusts heating medium temperature based on operational mode. During heating operations, a lower first temperature is used to prevent burns, while during hot water supply operations, a higher second temperature is used to ensure sufficient heating capacity. This dynamic adjustment eliminates the need to operate at high temperatures continuously
Solution Approach 2:
The patent changes the temperature parameter according to operational requirements. By switching between appropriate temperature levels for different modes, the system achieves high heating capacity when needed while maintaining safety through lower temperatures during heating operations, thus resolving the contradiction between productivity and safety
3Device complexity
If a switch part is used to alternately perform heating operation and hot water supply operation, then device complexity is reduced, but the ability to perform simultaneous operations deteriorate
Solution Approach 1:
The patent segments the circulation passage into multiple independent pathways (first circulation passage for heating, second circulation passage for hot water supply). This segmentation allows different heating media to flow simultaneously through different paths, enabling simultaneous operations while keeping the control mechanism relatively simple
Solution Approach 2:
The heating device is designed with multi-functionality to perform both heating operations and hot water supply operations, including simultaneous operations. The circulation system is configured to handle multiple functions through separate passages, providing versatility without requiring overly complex control mechanisms
4Adaptability or versatility
If multiple circulation passages are arranged to enable simultaneous operations, then adaptability and versatility are improved, but device complexity increases
Solution Approach 1:
The circulation system is segmented into distinct passages for different functions. The first circulation passage handles heating operations while the second circulation passage handles hot water supply operations. This segmentation enables simultaneous operations with relatively simple, dedicated pathways for each function
Solution Approach 2:
The control unit dynamically manages the multiple circulation passages by switching between different operational modes. The system can operate in heating mode, hot water supply mode, or simultaneous operation mode, with the control unit adjusting the flow distribution appropriately. This dynamic control allows versatility without requiring permanently complex configurations
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 configuration enables the expansion of the operational region for simultaneous heating and hot water supply, enhancing the device's capacity and allowing for quick transitions between heating, hot water supply, and simultaneous operations while maintaining safety by preventing overheating.
Implementation Method 1
a heat exchanger that heats a heating medium by heat generated in the combustion part
Implementation Method 2
a hot water supply heat exchanger arranged in the bypass passage... tap water is heated by heat exchange with the heating medium
Data Source
AI summary
Provided is a heating and hot water supply device. The heating and hot water supply device includes: a combustion part; a heat exchanger; a circulation passage; a circulation part; a bypass passage; a distribution means for distributing the heating medium to the circulation passage and the bypass passage; a hot water supply heat exchanger; a water supply passage; and a hot water supply passage (21). The distribution ratio of the distribution means is adjustable so as to correspond to a heating operation, a hot water supply operation, and the simultaneous heating and hot water supply operation. The heating and hot water supply device includes an operation part, which heats the heating medium to one or more heating terminal setting temperatures and circulates the heating medium, and switches a setting of the one or more heating terminal setting temperatures to be increased by a prescribed temperature during the simultaneous heating and hot water supply operation.