Automatic Excretion Disposal Device Odor Control
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Solution Overview
Problem
Existing automatic excretion disposal devices require frequent water supply and cleaning, leading to a burden on nursing staff and potential odor leakage into living areas.
Innovation Solution
The device simplifies configuration by omitting installation-type water and sewage tanks, using a direct water supply and drainage system, and incorporates a branch pipe to prevent odor leakage, with a suction motor that prevents excretion and odor from escaping between the cup and body, and a one-way valve to prevent backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a water supply tank and sewage tank are installed in the automatic excretion disposal device, then the device can store water and excretions, but the device complexity increases and nursing staff must frequently supply water and perform cleaning
Solution Approach 1:
The patent removes the installation-type water supply tank and sewage tank from the device configuration. Instead, it uses a direct water supply system connected to the building's water network and a drainage pump that discharges directly to the building's sewage system. This extraction of storage tanks eliminates the need for manual water refilling and sewage emptying, resolving the contradiction between ease of operation and device complexity.
Solution Approach 2:
The patent utilizes the building's existing water supply and sewage infrastructure to perform storage and disposal functions. The building's water network serves as the water source, and the building's sewage system handles waste disposal. This multi-functionality approach eliminates the need for dedicated storage tanks in the portable device, reducing complexity while maintaining operational ease.
2Productivity
If air is released to the atmosphere during excretion suction, then the suction process can proceed, but odor leaks into the living room
Solution Approach 1:
The patent introduces a branch pipe as an intermediary component that connects the air supply pipe to the drainage pipe. This intermediary structure allows air to be discharged through the drainage system rather than directly to the atmosphere, effectively routing odor away from the living room while maintaining suction functionality. The branch pipe acts as a mediator that resolves the conflict between suction efficiency and odor control.
3Adaptability or versatility
If the device is equipped with complete water supply and sewage storage systems, then it can operate independently, but the burden on nursing staff increases due to frequent maintenance
Solution Approach 1:
The patent enables the device to connect to the building's existing water and sewage infrastructure, allowing the building's systems to automatically supply water and receive sewage discharge. This self-service approach eliminates the need for nursing staff to manually refill water tanks or empty sewage tanks, reducing maintenance time and burden while preserving the device's operational capability.
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 solution significantly reduces the burden on nursing staff and minimizes odor leakage, enhancing the living environment by ensuring efficient and odor-free excretion disposal.
Implementation Method 1
a suction motor which generates negative pressure for sucking the inside of the cup, and sucks outside air from a gap generated between the cup and the body
Implementation Method 2
an air supply unit which generates positive pressure for supplying air into the cup, and dries the inside of the cup and the body
Implementation Method 3
a drainage pump which causes sewage to flow out to a drainage pipe, while pulverizing the sewage
Data Source
Figure 1
Figure 2
AI summary
Provided is an automatic excretion disposal device (1) which is configured to automatically perform an excretion disposal of a person (P) to be cared, the device including: a cup (2) which is attached to a body of the person to be cared to receive excretion; a detection unit (3) which is configured to detect excretion in the cup; a feed water pipe which is configured to decompress cleaning water from a water supply (W) to a predetermined pressure and directly supplies the cleaning water, on the basis of detection result of the detection unit; a suction motor (30) which is configured to suck sewage generated when the body and inside of the cup are cleaned with the cleaning water supplied from the feed water pipe (R1), and to discharge the sewage to outside of the cup; a tank (10) which is configured to temporarily store the drainage sucked by the suction motor; and a drainage pump (20) which is configured to cause the drainage to forcibly flow out to a drainage piping connected to a sewer or a septic tank, while pulverizing solid matters contained in drainage in which the sewage stored in the tank is mixed with the cleaning water directly supplied from the feed water pipe.