cre8.appliance.v1 · fan
Desk fan, 300 mm
The fan passes its checks
Desk fan takes 64 steps from 9 raw materials: 5 run here, 22 by partners, 37 are bought. The plan makes that 10 here, 17 by partners, 37 bought. 10 inputs are still opaque.
- Mass
- 3.12 kg
- Parts
- 25
- Airflow, top speed
- 754.7 cfm at 1350 rpm
- Input, top speed
- 39.5 W
- Noise at 1 m
- 48.1 dB(A)
- Efficacy
- 19.1 cfm/W
Recipe
As recipe text
cre8.appliance.v1 kind=fan base_diameter_mm=220 base_mass_kg=0.8 blade_diameter_mm=300 blade_thickness_mm=2 blades=3 chord_mm=90 cord_m=1.8 cord_mm2=0.824 guard=steel_wire guard_clearance_mm=20 guard_pitch_mm=10 guard_wire_mm=1.8 height_mm=380 hub_diameter_mm=60 insulation=b low_rpm=1050 mains_hz=60 mains_v=120 motor=shaded_pole motor_w=45 oscillate=true pitch_deg=18 poles=4 speeds=3 style=desk top_rpm=1350
Checks
| Check | Reads | Holds to | |
|---|---|---|---|
| Efficacy | 19.1 cfm/W at its worst speed | at least 10 cfm/W at every speed (assumed floor) | holds |
| Stall | 23.3% of the blade span past stall at the top speed | at most 25% | holds |
| Motor speed | 1350 rpm at the top speed of 1800 rpm synchronous | at most 1584 rpm | holds |
| Overload | 39.5 W drawn at the top speed | the motor's 45 W rating | holds |
| Winding heat | 45.7 K rise at 1350 rpm, 27.7 W lost | at most 95 K for its insulation class | holds |
| Cord | 0.824 mm² carrying 0.625 A | at least 0.5 mm² | holds |
| Guard | 8.2 mm openings, the finger stops short: reaches 0.345 mm past the guard | less than the 19.1 mm to the blades (ISO 13857 would ask 80 mm, for comparison only) | holds |
| Tipping | tips at 20.4°; blowing 0.821 N·m against 2.77 N·m to stand | stands on a 10° incline and while running | holds |
| Noise | 48.1 dB(A) at 1 m; blade pass 67.5 Hz | at most 60 dB(A) (assumed) | holds |
At each speed
| rpm | cfm | Air, m/s | Thrust, N | Input, W | Current, A | cfm/W |
|---|---|---|---|---|---|---|
| 1050 | 587 | 3.04 | 1.31 | 23.9 | 0.332 | 24.5 |
| 1200 | 670.9 | 3.48 | 1.71 | 31.2 | 0.434 | 21.5 |
| 1350 | 754.7 | 3.91 | 2.16 | 39.5 | 0.549 | 19.1 |
Bill of parts
| Part | Group | Count | Formed by | Each | Materials (each) |
|---|---|---|---|---|---|
| Stator | motor | 1 | laminate | 358 g | electrical steel 358 g |
| Winding | motor | 1 | wind | 119 g | magnet wire 119 g |
| Shading ring | motor | 4 | stamp | 5.96 g | copper strip 5.96 g |
| Rotor core | motor | 1 | laminate | 135 g | electrical steel 135 g |
| Rotor cage | motor | 1 | cast | 55.7 g | aluminium 55.7 g |
| Shaft | motor | 1 | turn | 47.7 g | steel rod 47.7 g |
| Bearing | motor | 2 | bought | 11.9 g | bearing 11.9 g |
| End bell | motor | 2 | stamp | 15.9 g | steel strip 15.9 g |
| Blade set | rotor | 1 | mould | 94.5 g | polypropylene 94.5 g |
| Spinner | rotor | 1 | mould | 15 g | abs 15 g |
| Motor housing | head | 1 | mould | 86.2 g | abs 86.2 g |
| Rear guard | head | 1 | wire form | 259 g | steel wire 252 g, powder coat 6.99 g |
| Oscillation gearbox | head | 1 | mould | 70 g | pom 70 g |
| Oscillation crank | head | 1 | stamp | 40 g | steel strip 40 g |
| Tilt bracket | head | 1 | stamp | 120 g | steel strip 120 g |
| Front guard | final | 1 | wire form | 310 g | steel wire 252 g, steel strip 49.3 g, powder coat 8.52 g |
| Guard ring | final | 1 | mould | 156 g | abs 156 g |
| Fasteners | final | 12 | bought | 3 g | fastener 3 g |
| Neck | stand | 1 | mould | 63.5 g | abs 63.5 g |
| Base weight | stand | 1 | stamp | 800 g | steel strip 800 g |
| Base cover | stand | 1 | mould | 149 g | polypropylene 149 g |
| Switch housing | controls | 1 | mould | 40 g | abs 40 g |
| Switch contact | controls | 4 | stamp | 2 g | copper strip 2 g |
| Mains cord | controls | 1 | extrude | 52.3 g | pvc cord 25.7 g, copper strand 26.6 g |
| Mains plug | controls | 1 | bought | 30 g | mains plug 30 g |
3.12 kg in all, 3.04 kg carried by the stand (the cord and plug lie on the floor).
Made from
The longest chain is 8 steps; 0 of 30 made pieces have a published plan. The graph is make:desk-fan.
| Material | Per fan | From |
|---|---|---|
| Copper ore | 38.5 kg | mined: porphyry copper ore, about 0.6 % Cu |
| Iron ore | 4.05 kg | mined: hematite ore, about 62 % Fe |
| Coal | 1.51 kg | mined: bituminous coal |
| Crude oil | 757 g | drilled: crude oil |
| Limestone | 639 g | quarried: limestone |
| Bauxite | 295 g | mined: bauxite, about 50 % alumina |
| Natural gas | 83.9 g | drilled: natural gas, mostly methane |
| Quartz | 60 g | quarried: high-purity quartz lump |
| Salt | 25.5 g | mined: rock salt or solar brine |
| Steel scrap | 745 g | recovered: collected: sorted steel scrap |
| Caustic soda for the Bayer liquor | 9.45 g | recovered: taken from chlor-alkali cells, where it comes off beside chlorine |
Where buying starts
- Alloy and roll electrical steel
- Cast rod, draw and enamel magnet wire
- Cast and roll copper strip
- Electrolyse alumina to aluminium
- Roll steel rod
- Make the bearing
- Roll steel strip
- Polymerize propylene
- Graft and compound ABS
- Draw steel wire
- Trimerize and polymerize acetal
- Extrude the mains cord
- Make the mains plug
- Head, roll and plate fasteners
Still opaque
| Input | Per fan | What is missing |
|---|---|---|
| Prebaked carbon anode | 25.7 g | calcined petroleum coke and coal-tar pitch; not drawn yet |
| Polyester powder coat | 16.3 g | polyester resin, curing agent and pigment; not drawn yet |
| PVC plasticiser | 13.7 g | DINP or DOTP from oxo alcohols and phthalic or terephthalic acid; not drawn yet |
| Zinc for brass | 3.88 g | zinc metal; its mine and smelter are not drawn yet |
| Magnet wire enamel | 3.68 g | polyester-imide or polyamide-imide enamel; formulation not disclosed |
| Aluminium fluoride | 1.22 g | from fluorspar or fluorosilicic acid; not drawn yet |
| PVC heat stabiliser | 0.914 g | calcium-zinc stabiliser package; formulation not disclosed |
| Bearing chromium, cage and grease | 0.715 g | the 1.5 % chromium of 52100 steel, the pressed cage and the grease; not drawn yet |
| Zinc plating | 0.36 g | zinc and passivate chemistry; the zinc's mine is not drawn yet |
| Ziegler-Natta catalyst | 0.0751 g | titanium chloride on magnesium chloride; the makers do not disclose the recipe |
Who makes it
Today 5 steps run here, 22 by partners and 37 are bought. The plan runs 10 here, 17 by partners and buys 37.
Machines here: assembly bench, cnc lathe, cnc wire bender, coil winder. Partner capabilities wanted: die casting, injection moulding, lamination stamping, metal stamping. Standard chains use typical published yields and loadings, rounded; none is measured on a line this network runs.