Device for regulating the temperature in the greenhouse

 

(57) Abstract:

Usage: in the climatic equipment for greenhouses and polytunnels. The inventive device includes a guide on which the plate rests, associated with the flexible guide element, the node setting its initial position, the elastic element and the cylindrical elements. When the temperature in the greenhouse extension plates through the tightening element results in bending of the flexible element consisting of cylindrical elements, and the moving rod. If the temperature drops, all nodes are returned to the original position. 6 Il.

The invention relates to agriculture, namely, to the climatic equipment greenhouses and polytunnels.

Known temperature-controlled greenhouse, drive rotation of the frame which is made in the form of telescopically arranged sleeves of heat-conducting material between the bottoms of which are placed springs made from a material with shape memory and having different temperature recovery form. The device has small dimensions and a sufficient force to rotate the frame. The disadvantages include the fact that it is a threshold, and springs with shape memory is a device for regulating the temperature in the greenhouse, the actuator which is made in the form prescribed in the guide upper, middle and lower plates, a material which has a different coefficient of linear expansion. One ends of the upper and middle plates are rigidly connected, the other end of the middle plate rigidly attached to the guide. The bottom plate is the whole plane is in contact with the latter and one end by a stop rigidly connected with the upper platinum. Rod secured to the free ends rigidly connected upper and middle plates.

The upper and middle plates being rigidly connected at one end, providing a flexible element which, when thermal deformation changes its configuration in a certain arc. In the middle of the flexible element plates are connected to each other using pressure rollers.

This device is easy to manufacture, the temperature of the greenhouse is regulated smoothly, the size is not very large. However, it has the following disadvantages: guide rollers presses the middle and upper plates of the flexible element are not located along the entire length of these plates and where they are not flexible element when thermodeformative can bend in one direction or another. This consequently reduces the speed t is e great efforts the device temperature control; for small displacements of the lower plate it is difficult to provide a rigid connection of the top plate by rolling stop, because there are gaps that have nothing to choose. The presence of backlash reduces the efficiency of the drive.

The purpose of the invention to increase the stroke of the rod and to develop its efforts when the temperature in the greenhouse.

This objective is achieved in that the device for regulating the temperature in the greenhouse, including cravings and the sensing node, containing the guide, and a flexible element, one end of which is associated with craving, along the guide under a flexible element set plate from a material with a large coefficient of thermal expansion than the material of the guide. At both ends of the plate are lugs, one of which is made movable relative to the guide. The sensing node is equipped with a limiter flexible element rigidly mounted on the rail side rolling stop and connected with the other end of the flexible element. On a movable stop mounted node set the initial position of the flexible element. Itself flexible element made in the form of a set of cylindrical elements, each of which consists of core and solid what exploits tightening element, passing through the limiter flexible element and the cylindrical elements are offset relative to the Central axis of the latter and connected at one end with a thrust, and the other with node set the initial position of the flexible element. The cores of the cylindrical elements and the elastic element is made of materials with different coefficient of thermal expansion.

In Fig. 1 and 2 shows a device for regulating the temperature in the greenhouse of Fig. 3 - section a-a in Fig. 1; Fig. 4 - section b-B in Fig. 1; Fig. 5 is a view In Fig. 2; Fig. 6 - node I in Fig. 1.

The device comprises a guide rail 1, the plate 2 from a material having a larger coefficient of linear expansion than the material of the guide, fixed focus 3, the movable stop 4, the flexible element 5, the node set the initial position of the flexible element 6, the limiter flexible element 7, the elastic element 8, the displacement of the tightening element relative to the Central axis of the cylindrical elements 9, hard shell 10, the first cylindrical element 11, rod 12, the latter cylindrical element 13, the hinge 14, the screw 15, a nut 16, the core 17 of the cylindrical element. Guide 1 is used for placing the stop 3, plate 2, a movable stop 4, per the>Along the length of the plate 2 is limited to one side of the stop 2, and on the other, a movable stop 4 moving along the guide. The tightening element 8, one end of the fixed in the nut 16 through holes made in the movable stop 4 and the limiter flexible element 7 passes these nodes, passes through the cylindrical elements, through hinge 14 and rod 12, again passes through the cylindrical elements, the limiter, the movable stop and the second end of the elastic element 8 is fixed on the nut 16 at the other point. As cylindrical elements during thermal deformations are significant compressive forces, they are protected from damage or destruction in places of contact with each other a hard shell. Plate 2 can be manufactured, for example, Plexiglas, the core 17 is made of polyethylene.

The device operates as follows.

Before you begin your device, you must perform an initial installation, which selects all the backlash and high efficiency. To do this, rotate the screw 6 in a clockwise direction. Its the end of the screw 6 abuts against the movable stop 4, which moves along the guide rests against the plate 2. When this is selected the backlash in acetelyne lengthening plate 2 (milimeter) must be caught and converted into a useful signal. At the same time the nut 16 is drawn tightening element 8. When this is selected, the clearances between the cylindrical elements, since the latter cylindrical element fixed limiter 7. To rotate the screw stop when the cylindrical elements form between the contact lines passing through the center of the heat-sensitive elements. This rod 12 is not yet lifted.

When the temperature inside the greenhouse plate 2 and extends through the stop 4, the screw 15 and the nut 16 begins to move to the right tightening element 8. The cylindrical element 13 does not move, because the fixed stop 7, and the first cylindrical element 11 begins to push on everyone else. Due to these forces due to the offset of 9 all branch cylindrical elements (flexible element) will be deflected upward together with the thrust at a certain angle. At the same time by increasing the temperature will expand yourself cylindrical elements. In this issue forces moved cravings and branch of the cylindrical elements at an additional angle. This provides the necessary movement and effort. If the temperature drops, all nodes are returned in original condition.

Device for adjusting the temperature in the greenhouse is to casualise when the deviation of the cylindrical elements.

The effectiveness of the proposed device in comparison with the prototype is the following. Due to the fact that the flexible element along the entire length of discretized cylindrical elements, it does not experience bending stresses, which makes it possible to transmit a greater thrust force. Increases the movement: first, due to the fact that you have selected all the backlash and used effectively lengthening plate 2; secondly, by the conclusion of the cores of the cylindrical elements in the hard shell had the opportunity to manufacture the cores are cylindrical elements made of material having a large coefficient of linear thermal expansion; third, there is no possibility of deflection of the flexible element in one direction or another due to sampling and due to the displacement of the tightening element relative to the Central axis of the cylindrical elements. Set the initial position of the flexible element is simple and takes little time.

DEVICE FOR regulating the TEMPERATURE IN the GREENHOUSE, including cravings and the sensing node, containing the guide, and a flexible element, one end of which is associated with craving and the other with a guide, along which the flexible element set plate Isny are stops, one of which is made movable relative to the guide, characterized in that, to increase the stroke of the rod and to develop its efforts when the temperature in the greenhouse, the sensing node is equipped with a limiter flexible element rigidly mounted on the rail side rolling stop, while on a movable stop mounted node set the initial position of the flexible element, and the flexible element is made in the form of a set of cylindrical elements, each of which consists of a core and a solid shell, the cylindrical elements are in contact with each other through the shell and connected with a thrust through the tightening element, passing through the limiter flexible element and the cylindrical elements are offset relative to the Central axis of the latter and secured by one end on the deadlift, and the other node set the starting position of the flexible member, the cores of the cylindrical elements and the elastic element is made of materials with different coefficients of thermal expansion.

 

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