对于这种拆除，我们加入了Cooker Perkins的Co Cooper Perkins的长期虚拟合作伙伴Harald Quintiv，以及Cooper Perkins的工程和运营的Ann Torres。Harald和Ann都为我们提供了许多深入了解Dyson Cool虚伪风扇背后的设计和制造过程。

The Dyson Cool uses the Coanda effect, or an air inducement and entrainment, to create an air flow that is smoother than traditional bladed fans. While costing approximately $299, the retail price for this fan technology is approximately ten times the price of a typical fan. The reasons for the price difference can partially be seen in the details of the teardown, where clever design, high quality parts, and intricate molds are seen everywhere in the assembly.

Here are the features of interest we’re drilling into for this teardown:

1. Fan Outer Housing– an extremely complex injection molded part that delivers polished and reveal-free surfaces on the outside, with numerous functional features on the inside

2. Air Flow Design– at the center of the air flow path is the impeller, which is designed for maximum performance and quiet operation

3. Design for Assembly- 实施了巧妙的设计功能，以确保易于装配和干净的外部，没有暴露的硬件

4. Cost Analysis –商品的成本远远超过典型的粉丝，所以我们将挖掘到任何因素可能导致Dyson的价格。要深入了解这个主题，Cooper Perkins CTO Harald Quintus-Bosz将主持设计规模的网络研讨会,周五October 19th，基于他在麻省理工学院教导的课程。了解更多并注册，访问网络研讨会页面。

风扇外壳

The outerhousingcan be thought of as two subhousings: the head and the pedestal. Both parts are well-engineered injection molded parts, as is typically seen in Dyson products. There were no machined parts inside either housing.
将头部与基座分开后，使用光滑扭转和转动机构，我们试图用平板工具从头部撬出银轮。然而，两者彼此紧密结合，表明这两片是超声焊接或用粘合剂粘合的。
基座由两部分组成：基座和支架。底座容纳风扇的电子产品，而支架容纳叶轮和所有相关部件，将气流引向风扇头部。底座和支架都是复杂的塑料injection molded partsthat required numerous actions in order to create them.

The pedestal housing requires twelve side actions in the cavity to create the vent holes on the outside. In addition, there is a trapped area on the inner diameter that is bounded by two circumferential ribs. This means that the core likely had to be taken out as a collapsing set of segments. Additional features that are normal to the inside surface indicate that there were likely numerous action components to the collapsing core on the inside of the pedestal housing.
Four side pulls were used on the top of the pedestal stand in order to create the features that facilitate the twist-and-turn locking mechanism between the head and the stand. We also noticed internal parting lines inside this piece, indicating that at least 4 internal actions were used.

基座由两部分组成：基座和支架。底座容纳风扇的电子产品，而支架容纳叶轮和所有相关部件，将气流引向风扇头部。底座和支架都是复杂的塑料injection molded partsthat required numerous actions in order to create them.Just like the pedestal stand, the pedestal base also has several actions in order to make all necessary features. Numerous submarine gates were noticed on the core side of the base, further indicating the complexity of this part.The pedestal is made up of two parts: the base and the stand. The base houses the electronics of the fan, while the stand houses the impeller and all related parts that direct the airflow towards the head of the fan. Both the base and the stand are complex plasticinjection molded partsthat required numerous actions in order to create them.

Air Flow Design

The key to understanding how the air flows through the Dyson Cool lies in the pedestal stand of the fan, where the blades are located. To learn how the air flows through all the parts in the stand, we began by taking apart the top of the pedestal.

The first two pieces we removed were the upper plenum air guide (left) and the aerodynamic diffuser (right). The aerodynamic diffuser is a crucial piece, as it separates the air that is being pushed up towards it (from the impeller that is housed below) into controlled parts of air. The aerodynamic diffuser and outer upper plenum air guide are both made out of glass filled polypropylene.

Next, we removed the impeller/motor mount from the pedestal. The motor is mounted to this part facing the top of the pedestal stand, while the impeller is attached on the other side, on the bottom of the pedestal stand.

The impeller is another complicated part. It has nine asymmetric blades that are scalloped on the output edge, in order to soften the pressure differential and create smooth airflow. There is evidence in two places that the impeller is dynamically balanced to prevent it from vibrating when the fan is running.

Unlike in earlier models, where the impeller was post-machined for signal tuning purposes, this impeller has features that soften the airflow at the trailing edge and consequently reduce noise levels.

The impeller is housed inside this volute to further capture and dissipate the motor noise. It is also engineered to dampen vibrations caused by the motor.

装配设计

While taking this fan apart, we came across a number of smart design features that were implemented for the purpose of design for assembly. One of these features was the locking mechanism used to constrain the tilt plate’s position. The locking part mates to the top face of the pedestal base through the use of a snap fit. A very small snap head is designed, yet it does a fantastic job of keeping the tilt plate in place.

The upper plenum air guide and the outer perimeter piece incorporated poke yoke in their designs, so they could only be assembled in one way. Neither of the bosses on either part lines up with each other, unless they are both assembled in the right orientation with respect to one another.

Cost Analysis

戴森风扇作为普通风扇的昂贵约10倍，但它从根本上做了同样的工作。什么可能是高成本的原因？Dyson Fan定位为具有美丽美观的高性能和高品质的风扇。这意味着质量材料的目标，隐藏紧固件，产品外部的最小分部线，低噪音和长寿命导致更昂贵的材料，工艺和组件。Dyson Fan的定位允许Dyson收取溢价，但此估计也表明它还有重大成本溢价，以提供质量水平。

Main Takeaways

Tearing down the Dyson Cool illuminated just how much engineering has gone into designing this “magical” fan. While the fan is sleek and elegant from its exterior, it houses several intricately designed parts that work together to create a constant cool breeze.

With a number of complicated parts, from the fan housing to the impeller, the production of the fan’s parts calls for advanced plasticinjection moldingprocesses. In addition, this product was designed with the intention of an easy assembly process, resulting in several clever mechanisms.

What really sets this fan apart is the technology behind this “bladeless” fan. Dyson engineers have applied the fundamental laws of inducement and entrainment to develop a technology that is both simple and brilliant.

Dyson Fan teardown