SU1597864A1 - Temperature control - Google Patents

Abstract

The invention relates to instrumentation engineering, in particular, to gauge type temperature regulators designed to regulate the temperature of electrical devices. The aim of the invention is to increase the reliability of the thermostat. The goal is achieved by the fact that in the thermostat the lever 5 is provided with spring supports 8 fixed on the housing 17 of the contact switch and pressing the lever 5 on the elastic element 3 and the stop 11 fixed in the housing 7, and a rigid plate 18 is fixed on the lever 18. 3 Il.

Description

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The invention relates to instrumentation, namely k gauge type temperature controllers, designed to control the temperature of electric ovens, stoves, ovens and other electrothermal process equipment.

The purpose of the invention is to increase the reliability of the thermostat.

FIG. Figure 1 shows the kinematic scheme of the thermostat; in fig. 2 and 3 - structures of the thermostat lever; in fig. 4 - thermostat cam designs.

The thermostat (Fig. 1) consists of a thermal system containing a thermotube 1, a capillary tube 2 and an elastic element 3, a setting mechanism 20 made in the form of an axis 4 s. a helix for changing the temperature of the displacement within a predetermined range of settings, the lever 5, the axis 6, which is mounted in the housing 7. The lever 5 25 is equipped with spring supports 8 and rests on the rod 9 of the switch 10 contacts, and on the other side - stop 11, fixed on the housing 7.

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Lever 5 with spring. returns stock. 9 to the initial position, and the cycle is repeated.

When transferring thermoregulatory to the lower setpoint, the lever shafts additional deflection, and excessive displacement, which the elastic element 3 carries in the real state due to the fact that step 5, deflection, moves the support 11 of its reference angle 19 (Fig. 1, dashed lines ) In this way, the lever 5 simultaneously performs two actions: it transfers the elastic element 3 to the pre-switch 10 without additional stiffness and compensates for the excess gap that occurs when additionally moving the elastic element 3 to the right of the thermal bulb or transferring the setpoint to the lower axis using the 4 axis.

At the same time, in the deflection of the entire plane of the lever 5 behind the rigid plate 18 and the place, which allows to expand the zones of technological deviations during its manufacture and

Axis 4 with a helix size of 30 rejects on the spring,

is located in the nut 12, which is mounted on the housing 7. Inside the housing 7 on the axis 4 there is a cam 13. The switch 10 contacts has contacts 14 and 15 for switching the electrical circuit 16 and is placed in the housing 17 .. The lever has a rigid plate 18 and bearing surface 19.

The thermostat works as follows.

Axis 4 (Fig. 1) sets the required response temperature of the thermostat. When the thermal bulb 1 filled with a thermoactive liquid is heated, the liquid expands and enters the elastic element 3 through the capillary tube 2. Under the action of the thermoactive liquid, the elastic element 3 makes a translational motion. Acts on the rod 9 of the switch 10 contacts through the lever 5. Switch 10 contacts triggered by disconnecting the heating circuit. The bulb is cooled, the thermoactive fluid is compressed, and the elastic element 3 returns to its original state.

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Claims (1)

Invention Formula The thermostat containing a cylinder, connected by a capillary with a rudimentary element, is connected from the side with a mechanism that is adjusted by a lever which closes on the other side, one end of which is flared on an axis fixed in to the other end of the shaft and has an axis of contact with the stem of contacts, I distinguish By the fact that, in order to improve the reliability of the thermostat, the cue arm is made at the same time with spring supports, the switch body is located on both sides of the lever and pinning the bend to the elastic element and the unit attached to the body. There is a hard section of its contact with the rod of the bodies and the supporting contact surface with an emphasis. 0 0 5 five Lever 5 using spring. Support 8 returns the rod. 9 to its original state, and the cycle is repeated. When the thermostat moves from the upper to the lower setpoint, the lever 5 performs additional deflection, compensating for the excess movement created by the elastic element 3 in the expanded state due to the fact that the lever 5, deflection, moves along the support 11 with its support surface 19 (Fig. 1 dashed lines). Thus, the lever 5 simultaneously performs two actions: it transmits the movement of the elastic element 3 to the switch 10 without an additional rigid lever and compensates for the excess movement that occurs with the additional stroke of the elastic element 3 when the thermal bulb is overheated or transferred from the upper setpoint to the lower one using the axis 4 .. At the same time, the entire plane of the lever 5 participates in the deflection, with the exception of the rigid plate 18 and the attachment point, which makes it possible to expand the range of deviations of technological operations in its manufacture and reduce Invention Formula A thermostat containing a thermal bulb connected by a capillary with an elastic element connected on one side with a setting mechanism and contacting on the other side with a flexible lever, one end of which is mounted on an axis fixed in the housing, and the other end of the shaft is mounted on an axis with a pin of the contact breaker, characterized by the fact that, in order to increase the reliability of the thermostat, it has a gib-. The cue lever is integral with two spring supports resting on the body of the contact switch and located on both sides of the flexible arm and pressing the flexible arm to the elastic element and the stop fixed to the body, and the flexible arm is provided with a rigid section at the point of contact with the stem of the switch and supporting surface at the point of contact. with emphasis. Hard. ig.Z u.2 y /} f ////. FIG.