Circulating hot water nursing machine
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Solution Overview
Problem
Existing nursing machines for patients with cardiovascular and cerebrovascular diseases are inefficient in heating water, prone to energy loss, and pose health risks due to bacterial contamination, with problematic connections and noise issues from high-speed fans.
Innovation Solution
A circulating hot water nursing machine with a PTC heater for efficient temperature control, UV sterilization for water disinfection, a fast connection structure for the working head, and a noise-reducing negative pressure source with acoustic foam, along with a pressure release valve to prevent damage from vacuum pressure buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an instantaneous water heater is used to heat water in the nursing machine, then the heating speed is improved, but the power requirement increases and the water temperature cannot reach the set temperature due to limited output power and water volume
Solution Approach 1:
The patent applies preliminary action by pre-heating water in a water tank before use, rather than heating instantaneously during operation. The water heater heats water in advance and stores it in the water tank, ensuring hot water is ready when needed without requiring high instantaneous power output.
Solution Approach 2:
The patent implements dynamics by making the water tank movable and detachable from the main body of the nursing machine. This allows the water tank to be positioned optimally during use and easily removed for refilling or cleaning, adapting the system to different operational needs without compromising heating performance.
2Use of energy by moving object
If a traditional water heater with heating element in water tank is used, then the heating efficiency is improved, but risks of electric leakage and dry burning increase
Solution Approach 1:
The patent uses an intermediary approach by separating the heating element from direct contact with water through the water tank design. The heating element heats the water tank externally or through a controlled interface, preventing direct electrical contact with water and eliminating electric leakage risks while maintaining heating efficiency.
Solution Approach 2:
The patent applies beforehand cushioning by incorporating safety mechanisms that prevent dry burning before it occurs. The system includes automatic shut-off features and temperature monitoring that activate before the heating element can overheat or burn dry, preventing damage and safety hazards.
3Adaptability or versatility
If the nursing machine operates with heaters in insulating state most of the time, then the operational flexibility is improved, but energy loss increases significantly
Solution Approach 1:
The patent implements continuity of useful action by maintaining water in the tank in a heated or insulated state between uses. Rather than allowing water to cool down completely, the system keeps water warm through insulation or low-power maintenance heating, eliminating energy waste from repeated heating cycles while preserving operational flexibility.
4Stability of the object's composition
If the working head is fixedly connected to the main unit through connecting hose, then the connection stability is improved, but the working head cannot be easily detached or stored when not in use
Solution Approach 1:
The patent applies dynamics by making the connection between the working head and main unit adjustable and detachable. The connecting mechanism allows the working head to be securely attached during use for stable operation, but can be easily detached and stored when not needed, providing both connection stability and operational flexibility.
5Device complexity
If simple denoising measures like acoustic foam are used for the high-speed fan, then the device complexity is kept low, but the noise reduction effect is insufficient
Solution Approach 1:
The patent merges multiple functions into the fan assembly by integrating the high-speed fan with the negative pressure source and incorporating acoustic foam within the same housing. This combines noise reduction with the vacuum generation function, achieving effective denoising without significantly increasing overall device complexity.
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 solution provides constant water temperature, reduces energy consumption, ensures sanitary water, stabilizes connections, and minimizes noise and risk of damage from vacuum pressure, while maintaining safety and convenience.
Implementation Method 1
a PTC heater arranged on the main unit
Implementation Method 2
UV sterilization for water disinfection
Implementation Method 3
a noise-reducing negative pressure source with acoustic foam
Data Source
AI summary
A circulating hot water nursing machine includes a main unit and a working head, wherein a water tank support, a clean water tank, a small water pump and a PTC heater are arranged on the main unit; a heating tank is arranged at a lower part of the water tank support, the clean water tank is arranged at an upper part of the water tank support, a shunt valve is arranged on the water tank support, a water inlet of the shunt valve is connected with the heating tank and the clean water tank, and a water outlet of the shunt valve, the small water pump, the PTC heater and the heating tank are connected successively; a control system and a main power supply are arranged on the main unit, and the small water pump, the PTC heater and the shunt valve are connected with the main power supply.