Water heater and control method therefor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing water heaters lack effective control mechanisms that consider both outside temperature and set temperature, leading to inefficiencies and safety concerns due to the use of resistive heaters and the need for additional safety devices.
Innovation Solution
A water heater system comprising a storage tank, first and second temperature sensors, a first heat exchanger with heating elements, and a second heat exchanger with a heat pump system, controlled by a controller that adjusts the operation of both heat exchangers based on outside and set temperatures to optimize heating performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a resistive heater is used to heat water, then heating performance is achieved, but power consumption is high and safety risks increase
Solution Approach 1:
The control system dynamically adjusts operating parameters including temperature thresholds, power levels, and timing based on outside temperature conditions. When outside temperature is above the first threshold, the system uses heat pump mode; when below, it switches to resistive heater mode, optimizing power consumption across different environmental conditions
Solution Approach 2:
The system transitions from static heating operation to dynamic control by continuously monitoring outside temperature and automatically switching between heat pump and resistive heater modes. The controller adjusts heating strategy in real-time based on environmental conditions, achieving optimal energy efficiency
2Temperature
If a resistive heater is used to heat water, then heating performance is achieved, but safety risks increase requiring additional safety devices
Solution Approach 1:
The system employs multiple temperature sensors to continuously monitor water temperature, outside temperature, and heat exchanger temperatures. This feedback mechanism enables the controller to detect abnormal conditions and switch from resistive heater mode to heat pump mode or shut down to prevent overheating and safety hazards
Solution Approach 2:
The control system proactively prevents safety issues by monitoring temperature thresholds and switching heating modes before dangerous overheating occurs. When outside temperature approaches critical levels, the system preemptively switches to safer heat pump operation or activates cooling modes to prevent safety incidents
3Ease of operation
If only temperature and flow rate of refrigerant are monitored, then heat pump control is achieved, but control efficiency is insufficient without considering outside temperature and set temperature
Solution Approach 1:
The control system automatically determines optimal heating strategies by integrating outside temperature data with set temperature requirements. The controller self-adjusts operating modes without user intervention, selecting between heat pump and resistive heater modes based on real-time environmental conditions and user preferences
Solution Approach 2:
The control system performs multiple functions by simultaneously considering refrigerant parameters, outside temperature, and set temperature. It integrates environmental sensing, mode selection, power management, and safety monitoring into a unified control framework that adapts to diverse operating conditions
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 efficiently provides hot water by controlling the heat exchangers based on environmental and set temperatures, improving energy efficiency and safety by reducing power consumption and preventing overheating.
Implementation Method 1
a first heat exchanger including at least one heating element configured to heat the water
Implementation Method 2
a second heat exchanger including a heat pump system configured to heat the water
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A water heater is provided that heats water in a storage tank and discharges the heated water. The water heater includes a storage tank configured to store water, at least one first temperature sensor configured to sense a temperature of the water stored in the storage tank, a second temperature sensor configured to sense a temperature related to an outside of the water heater, a first heat exchanger comprising at least one heating element configured to heat the water, a second heat exchanger comprising a heat pump system and configured to heat the water, and a controller configured to control at least one of the first heat exchanger and the second heat exchanger based on a temperature sensed by the second temperature sensor and a set water temperature.