Provided is an oxygen concentration device which is provided with: a prediction means which predicts the device power-usage amount, and which serves as a control mechanism capable of sustaining battery-driven operation, even in cases when the power required by the oxygen concentration device on a commercial power supply temporarily exceeds the output power-supply capacity of a battery and a control means which, in cases when the power supply is switched to a rechargeable battery, and the power prediction value from the prediction means exceeds the output capacity of the rechargeable battery, restricts the rotational frequency of a compressor such that the power consumption of the compressor becomes equal to or less than the output capacity of the rechargeable battery.本發明提供一種氧氣濃縮裝置,具備有如下之控制手段,來作為即使在使用商用電源下的氧氣濃縮裝置之電力暫時地超過電池之輸出電源容量時,也可繼續以電池驅動進行運轉的控制機構,該控制手段是:具備有裝置之電力使用量的預測手段,當電源切換成充電式電池之時,在預測手段之電力預測值超過了充電式電池之輸出容量的情況下,會限制壓縮機之旋轉數,以使濃縮器之消耗電力會在充電式電池之輸出容量以下。
