Variable flow rate hand showers and showerheads

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Solution Overview

Problem

Current low flow rate showerheads lack effectiveness in rinsing and maintaining warmth, with aftermarket solutions often causing mounting issues due to additional weight and being cumbersome and unsightly.

Innovation Solution

A shower device featuring an elongated hollow waterway with a spray head and valve that allows for variable water flow adjustment through a rotating collar, integrated into the handle, and a magnetic docking system for height adjustment, along with an air induction element to reduce water consumption without compromising cleaning performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of substance

If aftermarket adapter devices are used to reduce water flow, then water consumption is reduced, but mounting stability deteriorates due to additional offset weight

Engineering Contradiction:
Improvewater consumptionVSAvoidmounting stability
Core Design Contradiction:
Loss of substanceVSStability of the object's composition

Solution Approach 1:

The flow control valve is integrated directly into the hand shower body, merging the flow control function with the shower structure. This eliminates the need for separate aftermarket adapter devices that caused mounting instability, while still enabling water flow reduction from full rate to a trickle through the valve's rotation mechanism.

Inventive Principle:
Principle #5Merging (Combining)

2Loss of substance

If aftermarket adapter devices are installed to reduce water flow, then water consumption is reduced, but device complexity and aesthetics worsen due to cumbersome appearance

Engineering Contradiction:
Improvewater consumptionVSAvoiddevice complexity
Core Design Contradiction:
Loss of substanceVSDevice complexity

Solution Approach 1:

The flow control valve is integrated directly into the hand shower body, merging the flow control function with the shower structure. This eliminates the need for separate aftermarket adapter devices that caused mounting instability, while still enabling water flow reduction from full rate to a trickle through the valve's rotation mechanism.

Inventive Principle:
Principle #5Merging (Combining)

3Loss of substance

If low flow rate is used in showerheads, then water consumption is reduced, but rinsing effectiveness and warmth maintenance deteriorate

Engineering Contradiction:
Improvewater consumptionVSAvoidrinsing effectiveness
Core Design Contradiction:
Loss of substanceVSReliability

Solution Approach 1:

The valve provides dynamic, variable flow rate adjustment through rotation, allowing users to select between full flow rate for effective rinsing and reduced flow rate for water conservation. This dynamic control enables the system to adapt between different operational requirements, maintaining rinsing effectiveness when needed while reducing consumption during other phases.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS11406994B2Variable flow rate hand showers and showerheads
Publication Date: 2022.08.09 KOHLER CO(US)
  • US11406994B2 patent drawing
  • US11406994B2 patent drawing
  • US11406994B2 patent drawing

AI summary

A shower device includes an elongated hollow waterway, a spray head configured to emit water, and a valve. The elongated hollow waterway extends in a longitudinal direction and has a first end configured to receive water, a second end, and an internal fluid passage extending from the first end to the second end. The second end has a port extending in a radial direction from the internal fluid passage through the waterway. The valve is configured to control a water flow rate from the internal fluid passage of the waterway to the spray head. The valve includes a valve body that surrounds the port and a control member operatively coupled to the valve body and surrounding at least a portion of the valve body. Rotation of the control member and valve body relative to the waterway provides a variable adjustment of the water flow rate to the spray head.