Heating and hot water supply apparatus and control method thereof
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Solution Overview
Problem
In heating and hot water supply apparatuses with both heating and hot water supply functions, it takes time to raise the hot water outlet temperature at the start of use, and introducing the heating medium into the bypass path for prompt hot water supply reduces energy efficiency and heating capacity.
Innovation Solution
A control method and apparatus that adjust the division ratio of the heating medium flow between the heating circulation path and the bypass path based on the start reservation time of the hot water supply operation, allowing the heating medium to flow through the bypass path with a hot water supply heat exchanger before the hot water supply begins, and dynamically adjusting this ratio during heating and hot water supply operations to minimize heating capacity loss and energy inefficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the heating medium is introduced into the bypass path at the start of hot water supply, then the hot water outlet temperature rises quickly, but the heating capacity is reduced and energy efficiency decreases
Solution Approach 1:
The system performs preliminary heating of water in the hot water storage tank before the hot water supply is actually needed. By detecting a predetermined time before the scheduled hot water supply start time, the control unit activates the heating medium flow through the bypass path in advance, preheating the storage tank water. This preliminary action ensures that when hot water supply begins, the temperature rises quickly without needing to divert heating medium during the actual supply period, thus maintaining energy efficiency.
Solution Approach 2:
The control unit dynamically adjusts the flow rate of the heating medium through the bypass path based on the operational state. During the preheating phase before hot water supply, the bypass path flow is activated. During simultaneous heating and hot water supply operations, the control unit optimizes the division ratio of heating medium flow between the heating path and bypass path. This dynamic adjustment ensures quick temperature rise when needed while minimizing energy loss during normal operation.
2Adaptability or versatility
If the heating medium flows through the bypass path during heating operation, then the hot water supply function is activated, but the heating capacity is reduced
Solution Approach 1:
The system performs preliminary heating of water in the hot water storage tank before the hot water supply is actually needed. By detecting a predetermined time before the scheduled hot water supply start time, the control unit activates the heating medium flow through the bypass path in advance, preheating the storage tank water. This preliminary action ensures that when hot water supply begins, the temperature rises quickly without needing to divert heating medium during the actual supply period, thus maintaining energy efficiency.
Solution Approach 2:
The control unit dynamically adjusts the flow rate of the heating medium through the bypass path based on the operational state. During the preheating phase before hot water supply, the bypass path flow is activated. During simultaneous heating and hot water supply operations, the control unit optimizes the division ratio of heating medium flow between the heating path and bypass path. This dynamic adjustment ensures quick temperature rise when needed while minimizing energy loss during normal operation.
3Speed
If the division ratio of heating medium flow to the bypass path is increased, then the hot water outlet temperature rises quickly, but the heating capacity is excessively reduced
Solution Approach 1:
The system performs preliminary heating of water in the hot water storage tank before the hot water supply is actually needed. By detecting a predetermined time before the scheduled hot water supply start time, the control unit activates the heating medium flow through the bypass path in advance, preheating the storage tank water. This preliminary action ensures that when hot water supply begins, the temperature rises quickly without needing to divert heating medium during the actual supply period, thus maintaining energy efficiency.
Solution Approach 2:
The control unit dynamically adjusts the flow rate of the heating medium through the bypass path based on the operational state. During the preheating phase before hot water supply, the bypass path flow is activated. During simultaneous heating and hot water supply operations, the control unit optimizes the division ratio of heating medium flow between the heating path and bypass path. This dynamic adjustment ensures quick temperature rise when needed while minimizing energy loss during normal operation.
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 allows for rapid increase in hot water outlet temperature at the start of use without excessively reducing heating capacity during heating operations, while maintaining energy efficiency by optimizing the flow ratio through the bypass path.
Implementation Method 1
a hot water supply heat exchanger (140) having a primary side path (141) and a secondary side path (142) for heat exchange between liquids
Implementation Method 2
a heating mechanism for heating a heating medium
Data Source
AI summary
The disclosure provides a heating and hot water supply apparatus which includes a heating circulation path configured to circulate a heated heating medium with a heating terminal, and a bypass path branched from the heating circulation path for causing the heating medium to flow therethrough without passing through the heating terminal. A hot water supply heat exchanger is disposed in the bypass path. A division ratio of the heating medium from the heating circulation path to the bypass path is controlled by a distribution valve. The division ratio is increased from a first value to a second value when a reservation preheat control is started during the heating operation according to a start reservation time of hot water supply operation reserved by a timer, and set to a third value greater than the second value during a simultaneous operation of the hot water supply and the heating operation.