SU788084A1 - Temperature regulator - Google Patents

Description

one

The invention relates to automation, intended for automatic control of heat supply to the heating of a building.

A device containing a regulating needle mounted inside the elevator nozzle coaxially with it is known. The needle is moved by means of a controlled electric drive, the control unit of which is connected to the temperature and water flow sensors p. .

The device contains an electromechanical drive of the needle and an electronic control unit, which are structurally efficient, expensive and not highly reliable in operation. The maintenance of the device requires a high polytechnic qualification of the staff.

Closest to the present invention is a device comprising a housing with inlets, outlets and suction nozzles, a nozzle with a needle placed inside it, connected to a movable end of the bellows, a first valve connected to the regulating unit, and a constant choke 2j.

A disadvantage of the known device is its structural complexity.

The purpose of the invention is to control the controller.

This circuit is achieved by the fact that the regulator contains a second valve

5 and a hollow sleeve fixed inside the bellows “at its movable end, the first and second valves are rigidly connected to each other and mounted coaxially inside the sleeve and

10, the inner cavity of the bellows through the first valve communicates with the inlet pipe and through the second valve and the constant choke to the suction pipe.

tS The temperature regulator is shown schematically in the drawing.

The regulator includes a housing 1 with INPUT1ShM 2, output 3 and suction, 4 nozzle. The regulator is installed

20 yts between the external heating network 5 and the building heating system 6. The nozzle 7 is equipped with a regulating needle 8 connected through the lever 9 and t gu 10 with the movable end 11 of the bellows 12.

Claims (2)

25 Inside the bellows 12, on its movable mountaineer 11, the pole 13 is fixed inside; the rigidly interconnected first 14 and second 15 valves are coaxially mounted with the splint. The inner cavity of the bellows 12 through the first valve 14 is connected to the inlet pipe 2 and through the second valve 15 and then through a constant choke 16 to the suction pipe 4. The first and second valves 14 and 15 are connected kinematically to the regulating unit through in the form of a flat spring 18, which is connected at one end with a slider 19 correction screws 20, and at the other end with a movable CR111SHKA 21 SILPHON 22 connected to a thermal bottle 23 installed inside a heated room. Water is used as power fluid for heating. The device works as follows. In the steady-state mode, the heat balance of the building corresponds to the heating rate, and the controller passes the calculated amount of heat carrier - hot water. When the thermal condition of the building deviates from the norm, the liquid in the volume sensor of the room 23 (in the thermal bottle) changes its volume and causes a change in the length of the bellows 22 and movement of the movable cover 21, while the tension of the flat spring 18 changes increasing the temperature in the heated room and grinding it when the temperature drops). Deformation of the flat spring 18 leads to a shift of the valves 14 and 15 (down - with increasing temperature in the heated room and up - lowering it), which, moving, change their flow characteristics. In this case, the characteristics change mutually opposite, which causes a change in pressure drops in the zones of the saddles corresponding to them. As a result, the pressure in the bellows 12 and the pressure differential at the movable end 11 change. The end face 11 and the sleeve 13, together with the valves 14 and 15, work in the mode of tracking the room temperature. In addition, end 11 senses changes in the water pressure drop in the direct and return lines of the external heat network 5. In this case, the direction of movement of the end 11 is such that with increasing pressure drop in the network, needle 8 closes and decreases with decreasing. Thus, the device additionally performs the functions of a flow regulator. The position of the adjusting needle 8 is the result of the cumulative effect of all disturbing pulses, taking into account the transfer functions of the individual pulse channels and their ratios. The individual transfer functions are determined by the degree of change of the measured parameter and its role in the process of controlling the heat supply. Obviously, the steepness of the flow characteristics of the valves 14 and 15 affects the ratio of the gain factors when regulating with respect to temperature and differential pressure in the network. The nominal ratio of these parameters must be determined in each case depending on the specific physical parameters of the heated building and the parameters of the heating system at its connection point. These tasks can be solved by introducing a parametric range of the designs of the proposed device, similarly to the current range of unregulated elevators according to frame sizes. The choice of the characteristics of the throttles 16 allows the static characteristic of the controller to be changed. The advantages of the proposed device are in the autonomy of the device, in reducing operating costs due to the ease of maintenance of the device and the practical absence of unreliable elements j at lower 1 cost of manufacturing the device by simplifying the design and using technically simple manufacturing operations. The invention includes a temperature regulator comprising a housing with inlet, outlet and suction nozzles, a nozzle with a needle placed inside it and connected with a movable end of the bellows, a first valve connected with a regulating unit, and a constant choke, characterized in that In order to simplify the regulator, it contains a second valve and a hollow bushing fixed inside the bellows at its movable end, the first and second valves being rigidly connected to each other and mounted coaxially inside the hollow bushing, and the inner cavity of the bellows through the first valve communicates with the inlet pipe and through the second valve and the constant choke with the suction pipe. Sources of information taken into account in the examination 1.Turkin V.P. Automatic water heating systems for residential and public buildings. M., stroiizdat, 1976, p. 87 2. USSR author's certificate according to the application No. 2705418 / 18-24, cl. G 05 O 23/02, 1979 (prototype).