Air separation device and cold box assembly thereof

The invention discloses an air separation device and a cold box assembly thereof. The cold box assembly comprises a main heat exchanger, a box plate support used for fixing the main heat exchanger and a reinforcing beam, and the main heat exchanger is provided with an outer side box plate; the main heat exchanger is sleeved with the boxboard support, the boxboard support is fixedly connected with the outer boxboard of the main heat exchanger, and the boxboard support is constructed to be a standard part; the reinforcing beam is located outside the boxboard supports, and the two ends of the reinforcing beam are connected with the boxboard supports respectively. According to the cold box assembly disclosed by the embodiment of the invention, the box plate bracket is designed into a standard part, and the reinforcing beam is used for providing local reinforcement, so that the structure can be solidified and simple, and the cost can be reduced. 本发明公开了一种空气分离装置及其冷箱组件，所述冷箱组件包括：主换热器，用于固定所述主换热器的箱板支架，以及加强梁，所述主换热器具有外侧箱板