Oxygen generator which is better

The top four:SINO Oxygen Concentrator, Omron Oxygen Concentrator, Invacare Oxygen Concentrator, Philips Oxygen Concentrator. SINO oxygen concentrator is the best. First place:Xinnuo oxygen concentrator in many oxygen concentrator brands, SINO products leading the industry technology for at least 5 years, with nearly 100 oxygen concentrator patents, technical strength is very strong. With the global sales system, there are 12 sales blocks in China, involving online and offline business. The pre-sale and after-sale system is perfect and efficient, serving customers at all times. Second place:Omron Oxygen Concentrator Omron Healthcare (China) Ltd. started in Japan in 1933. Domestic family health monitoring equipment leading brand, world-renowned health care equipment behind the provider. Third place:Invicon Oxygen GeneratorThe Invicon Group is a leading manufacturer and provider of oxygen services in the fields of respiratory, rehabilitation, home care and medical equipment.Invicom offers its customers innovative products covering the entire supply chain, as well as service and healthcare solutions. It is their mission to work tirelessly to improve the quality of life of users around the world, and China is one of Invicom's most important markets. Fourth place: Philips Oxygen Philips Wellcome formerly known as the United States Wellcome Company, founded in 1976, was acquired by the Philips Group in December 2007, renamed "Philips Wellcome". Wellcome is now part of the Royal Philips Healthcare Division and has made many contributions to the healthcare industry. Philips Electronics is one of the world's largest electronics brands and the number one in Europe. It is a world leader in color TVs, lighting, electric shavers, medical diagnostic imaging and patient monitoring equipment, and monolithic TV products. Philips employs 166,500 people and is active in more than 60 countries in the fields of lighting, consumer electronics, home appliances and medical systems. Philips is listed on the New York Stock Exchange (PHG), London, Frankfurt, Amsterdam and other stock exchanges. 2003 sales amounted to 29 billion euros. 2004 was awarded by the Music Angel Organizing Committee as an advanced quality company, the company employs more than 164,000 people in more than 60 countries. Philips is a large, integrated group serving professional and consumer markets through three cross-cutting sectors: Healthcare, Lighting and Quality of Life. Philips entered the Chinese market in 1920. The first joint venture was established in 1985. Philips has become one of the largest investment partners in the Chinese electronics industry, with a total investment of more than 3.4 billion dollars. It has established 35 joint ventures and wholly owned enterprises in China, with more than 60 offices across the country and more than 19,000 employees.