SU1334047A1 - Thermal switch - Google Patents

Abstract

The invention relates to electrical engineering, namely to thermal switches used in the protection systems of objects in refrigeration, air conditioning, heat supply, etc. The aim of the invention is to simplify the design and reduce the inertia. The thermal switch includes a housing 8, a contact system 5, a transmission mechanism 3, a heat-sensitive mechanism in the form of a bellows 10 and an additional bellows 1I installed inside it, the space between which is filled with a heat-sensitive fluid 12, and a spring-loaded rod 2 connected to the moving parts of both bellows. When the temperature of the controlled medium increases, the sylphus 10 with the spring-loaded stem 2 moves downwards and opens the contact system 5. 1 sludge. WITH WITH 4

Description

The invention relates to electrical engineering, and to thermal switches used in systems for the protection of objects in refrigeration, air conditioning, heat supply, etc.

The purpose of the invention is to simplify the design and reduce the inertia.

The drawing shows the proposed thermal switch, a general view.

The thermal switch contains a thermo-sensitive mechanism 1, a rod 2, a transmission mechanism in the form of a lever 3 with an adjusting screw 4 and a switch - a contact system 5. The lever 3 has the ability to pivot on the axis 6 and is pressed by the spring 7 on the shaft 2. On the case 8 there is an emphasis 9. The heat-sensitive mechanism is implemented in the form of the main bellows 10 and the additional bellows 11, the space between them is filled with a heat-sensitive liquid 12. The upper part of the main bellows 10 is connected to the housing 8, and the bottom is connected to the bottom 13 and the shield 2. The upper part of the additional bellows 11 is connected to the housing 8, and the lower part is connected to the stem 2, while moving the additional bellows 1 1

up is limited to the stop 14. On the rod 30 of the mu, the transmission mechanism is installed2 a support collar 15 is made, against which the spring 16 abuts. To protect the temperature-sensitive mechanism from damages, a perforated casing 17 is installed on the case.

Thermal switch works as follows.

When the temperature of the controlled medium increases, the volume of thermosensitive fluid 12 increases. Since the movement of the additional bellows 11 up is limited to the stop 14, the bottom 13 of the bellows 10 moves with the rod 2 down. The spring 16 is then compressed. The lever 3 under the action of the spring 7 moves with the rod 2, moves away from the switch button 5 and, when the set temperature is reached, opens the contact system M.Tsitkin’s editor

Make spruce V.Konosov

Tehred M. Didyk Proofreader E. Roshko

Order 3955/40 Circulation 776 Subscription

VNIIPI State Committee. the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

0

20 th. When the temperature of the controlled medium decreases, the volume of thermosensitive fluid 12 decreases, the bottom 13 of the bellows I1 moves upwards under the action of the spring 16, and the contact system of the switch 5 closes. The thermal switch is set to a predetermined temperature by means of a screw 4.

Due to the fact that as the temperature increases, the movable end (bottom) of the bellows moves down and the rod moves away from the contact system, it is not necessary to protect the transmission mechanism and the contact system from overload, which simplifies the design of the thermal switch compared to the prototype.

20

The reduction of inertia is achieved by increasing the surface of the sensitive element in contact with the controlled medium.

25

Claims (1)

Invention Formula . A thermal switch containing a contact built-up housing located in a housing with the possibility of affecting the contact system, a thermosensitive mechanism in the form of a bellows and a thermosensitive fluid, a sub-spring 35 body, about t l and - 40 hours so that, in order to simplify the design and reduce the inertia, the thermosensitive mechanism is equipped with an additional bellows installed inside the main bellows and connected to the bottom with a spring-loaded stem, and between bellows is filled with a heat-sensitive liquid.