Embedded Tank with Counter-Flow Swimming and Waterproof Control

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Solution Overview

Problem

Standard swimming pools require significant space and resources, pose safety and health hazards, and private pools are limited by space and cost, affecting user experience, while existing swimming equipment in independent tanks face issues with water overflow and complex waterproofing needs.

Innovation Solution

An embedded tank design with integrated electrical and hydraulic waterproof boxes that automatically discharge water, featuring a counter-flow generator and shading platform for maintenance access, along with a support frame and filtering systems to prevent water backflow and simplify installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If swimming equipment is installed in an independent tank with a platform for users to rest, then users can rest and control water flow speed, but water overflows onto the platform and enters the space between the tank body and external enclosure, damaging control equipment

Engineering Contradiction:
Improvewater flow controlVSAvoidcontrol equipment protection
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The control equipment is nested within the waterproof box, which is integrated into the tank structure. The waterproof box acts as a protective container that holds the control equipment in a safe, water-resistant environment while maintaining access to water flow control functions.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The waterproof box serves as an intermediary barrier between the water environment and the control equipment. It mediates the interaction between water and electrical components, allowing water flow control while preventing water damage to the equipment.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Area of stationary object

If swimming equipment is installed in the ground, then space occupation is reduced, but additional waterproof boxes are needed, increasing device complexity

Engineering Contradiction:
Improvespace occupationVSAvoidwaterproof box structure
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The waterproof box is merged with the tank structure itself, eliminating the need for separate additional waterproof boxes. The control equipment is integrated into the tank's built-in waterproof box, simplifying the overall structure while maintaining ground installation space efficiency.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The built-in waterproof box serves multiple functions: it protects control equipment from water, provides a mounting structure for control components, and integrates with the tank's overall structure. This multi-functional design reduces the need for separate protective structures.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Length of moving object

If a standard swimming pool is used, then long-distance swimming is enabled, but construction cost and water consumption are high, and safety and health hazards exist

Engineering Contradiction:
Improveswimming distanceVSAvoidwater consumption
Core Design Contradiction:
Length of moving objectVSQuantity of substance

Solution Approach 1:

The counter-flow generator creates dynamic water flow that moves against the swimmer, enabling continuous swimming in a fixed volume of water. This dynamic water movement simulates an extended swimming environment without requiring a physically long pool, reducing water consumption while maintaining swimming distance capability.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The mechanical system of a long physical pool is replaced with a hydrodynamic system using the counter-flow generator. Instead of extending the physical length of the pool, the system uses water flow mechanics to create the effect of continuous swimming distance in a compact space.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 embedded tank design minimizes space occupation, ensures easy maintenance, and enhances user experience with adjustable water flow for various swimming levels, while maintaining waterproofing and preventing water overflow.

Implementation Method 1

a bottom surface of the electrical waterproof box and a bottom surface of the hydraulic waterproof box are each provided with a drainage chamber; the bottom surface of the electric waterproof box and the bottom surface of the hydraulic waterproof box are configured to incline toward the drainage chamber; and the drainage chamber is provided with a water outlet

Methodology Applied
Scientific EffectGravity: Gravitation

Implementation Method 2

The propeller can control the water to flow in a direction opposite to the swimmer, such that the swimmer will be pushed backward by the water flow generated by the propeller

Methodology Applied
Scientific EffectFluid flow:

Implementation Method 3

a first returned water-filtering system and a hydraulic waterproof assembly in the first installation space; and a second returned water-filtering system and an electrical waterproof assembly in the second installation space

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Data Source

PatentEP4360721B1Embedded tank
Publication Date: 2025.07.02 GUANGDONG CRYSTAL ISLAND HEALTHWISE CO LTD
  • EP4360721B1 patent drawingFigure 1~2
  • EP4360721B1 patent drawingFigure 3~4
  • EP4360721B1 patent drawingFigure 5

AI summary

An embedded tank includes a tank body, and boss structures are respectively provided at two sides of an end of the tank body. An installation space is provided between the boss structure and a support frame. One installation space is provided with a first filtering system and a hydraulic waterproof assembly, and the other installation space is provided with a second filtering system and an electrical waterproof assembly The hydraulic waterproof assembly includes a hydraulic waterproof box, and a hydraulic waterproof support. The electrical waterproof assembly includes an electrical waterproof box and an electrical waterproof support. A hydraulic operation unit is connected with a counterflow generator connected with the tank body. Two filtering systems are connected with a circulating water pump connected with a frequency conversion system. The frequency conversion system is connected with the tank body. A disinfection system is connected with an outlet pipe.