Worlds / World 3 / Product Design (3)

2-in-1 Washer / Steamer

High pressure outside, steam inside.

A commercial car-care machine with two modes: a high-pressure water jet for the outside of the car and steam for the inside. Researched against real safety standards.

Water mode100–180 bar

Steam mode120–155 °C

Height610 mm

Requirements19

Role: Solo · research, design, CAD
Course: Product Design (3)
2025/2026
Tools: Research · Personas · Competitor matrix · SolidWorks
Supervised by: Dr. Eslam Gharib
TA Aya Soliman

01Brief

Design a commercial product

Product Design (3) asked for a product that could really be sold. I chose car care: washing businesses need a strong jet for the outside of a car and gentle steam for seats, dashboards and glass. Today that usually means two machines.

02Research

Users, competitors and standards

I built user personas and a competitor matrix, then wrote 19 prioritized requirements based on IEC/EN 60335-2-79 (the safety standard for pressure washers and steam cleaners), CE marking and IP65 water protection.

03Sketch

Paper first

I sketched the main unit and every attachment before modeling. The notes set the targets: jet mode at 100–180 bar (300 bar max), a 15–30 second switch between modes, a 3-minute cold start for steam, an electric motor pump, an ABS body and about 35 kg in total. Then came the accessories for each mode: spray gun and lance, a triple nozzle (point and flat stream), an anti-twist high-pressure hose on an automatic reel, and steam tools for seats, glass and fabric.

Pen sketch of the main unit with control panel, wheels and annotations — Main unit sketch with the first targets.

Pen sketch page of pressure mode parts: lance, spray gun, triple nozzle, hose and reel — Pressure mode: lance, gun, nozzle, hose reel.

Pen sketch page of steam mode attachments: nozzles, brushes, squeegee and garment steamer — Steam mode: nozzles, brushes, squeegee.

04Design

One body, two modes

Water mode works between 100 and 180 bar, with 165 bar as the normal operating point. Steam mode runs at about 140 °C. Two lances and four nozzles (squeegee, brass brush, jet nozzle and brush head) cover exterior and interior jobs.

Water pressure lance, steam lance and four nozzles — Lances and nozzles.

05Prototype

Modeled in SolidWorks

The main unit is 610 mm tall with 200 mm wheels and a handle on top, so one person can roll it around a car.

Technical drawing of the main unit with dimensions and an isometric view — Main unit. Dimensions in mm.

Water pressure lance model — Water pressure lance.

06Born

In use

The poster shows the machine washing a car.

The washer next to a car being sprayed with water — Concept scene.