NEW YORK — Amazon on Friday announced it has agreed to acquire the vacuum cleaner maker iRobot for approximately $1.7 billion, scooping up another company to add to its collection of smart home appliances amid broader concerns about its market power. iRobot sells its products worldwide and is most famous for the circular-shaped Roomba vacuum, which would join voice assistant Alexa, the Astro robot and Ring security cameras and others in the list of smart home features offered by the Seattle-based e-commerce and tech giant. The move is part of Amazon’s bid to own part of the home space through services and accelerate its growth beyond retail, said Neil Saunders, managing director at GlobalData Retail.