The device for automatic ventilation of the greenhouse is made in the form of a valve, which can be built into any surface of the greenhouse, it contains one common housing of any cross section of various diameters with a hydraulic cylinder inside the working fluid. From below, the hydraulic cylinder is attached to the attachment unit to the body, from above, the hydraulic cylinder is installed in the housing using the fixation unit at a right angle to the lower part of the housing； from above, the hydraulic cylinder rod is attached to the attachment to the cap, with the possibility of displacement up and down so that when displaced up the hood opens the hollow hole of the housing, and when shifted down the hood closes its surface with the hollow hole of the housing. When the air temperature in the greenhouse rises, the working fluid in the hydraulic cylinder expands and drives the piston of the hydraulic cylinder, which displaces the cap up through the hydraulic cylinder rod, attached with the help of the hydraulic cylinder rod mounting unit to the cap. In addition, a compression spring is freely mounted on the hydraulic cylinder, which is fixed to the hydraulic cylinder, fixed at one end to the attachment unit to the body, and at the other end to the attachment unit of the hydraulic cylinder rod to the cap, thereby contributing to the return of the cap to its original position.Устройство для автоматического проветривания теплицы выполнено в виде клапана, который может быть встроен в любую поверхность теплицы, содержит один общий корпус любого сечения различного диаметра с расположенным внутри гидроцилиндром с рабочей жидкостью. Снизу гидроцилиндр прикреплен к узлу крепления к корпусу, сверху гидроцилиндр установлен в корпусе с помощью узла фиксации под прямым углом по отношению к нижней части корпуса, сверху шток гидроцилиндра прикреплен к узлу крепления к колпаку, с возможностью смещения вверх-вниз таким образом, что при смещении вверх колпак открывает полое отве
