I understand i want too much, but is it possible to disable object when it's not in the frame. It's just for rendering time reduce. I see that it's unable to set keyframe on the render icon, but may be there is another way to do it? Thank for your attention!
to switch visibility during rendering/animation just hit I when your cursor hovers over the little camera icon to add a keyframe. Then move the timeline cursor to another frame and tap on the little camera icon to toggle it and hove over it again and tap I again -> ready.
The other "place" where you can set the keyframe is here: (it has the same effect): (Renders)
In the Outliner (window usually at upper right of workspace), click on the small funnel looking button to the right. In there, you'll see a series of icons that you can use to toggle visibility.
The little camera is for rendering. If you click on that little camera icon next to the object you don't want to render and it goes dark, the object will not be rendered.
In answer to your comment, Blender doesn't render anything that's not in the camera view, so it's only taking up render power once it enters the frame.