RU61897U1 - HEATING FLOW REGULATOR - Google Patents

Abstract

The coolant flow controller is used to supply the hot water of the specified parameters to the heating network of buildings, and is installed in buildings between the heating network and the heat consumer. The essence of the invention lies in the fact that the actuator in the form of an electromagnetic valve, controlled by an electronic controller, delivers hot water by pulses. It is applied in municipal services. 1 n.p.f., 1 ill.

Description

The utility model relates to devices that provide heat supply to buildings, and are installed in individual heat points between the heating network and the consumer of thermal energy. Coolant flow controllers are used in public utilities.

Heating of buildings is carried out from the central boiler houses with hot water, which is supplied through the heating network to individual heating points. Fluid flow controllers are the link between the heating network and heat consumers. The coolant flow controllers provide the supply to the building of hot water of a certain temperature and pressure, as well as the required amount of hot water for domestic use, which creates a given temperature in the building.

The required amount of water for heating a building in an individual heating unit is determined by the flow rate controller, which, by a signal from temperature sensors, increases the flow of hot water when the temperature in the building is below normal or decreases the flow of hot water when the temperature in the building is above normal. For this purpose, a system for regulating the water supply to the building is created, which consists of pipelines through which hot water is transported to the building, and cold water is removed back to the heating network for heating, a flow regulator, auxiliary valves, mixing devices for circulating water in the building, filters, regulator differential pressure, heat measuring and metering devices.

Known flow rate regulator used in an individual heating unit, taken as an analogue [1].

An individual heating unit consists of pipelines supplying hot water and discharging cold water. A filter, a differential pressure regulator, a control valve with an electric actuator controlled by an electronic regulator, a circulation pump are installed on the supply pipe, and a check valve is installed between the supply and discharge pipelines.

The work of an individual heat point is as follows. Hot water flows through the supply pipe through a filter to the differential pressure controller, which keeps the differential pressure at the inlet of the heat point constant. In series with it, a control valve is installed, which passes as much hot water as necessary to create a given temperature in the building. Then, through the circulation pump, water is supplied to the heat exchangers of the building. From heat exchangers, chilled water enters the heating network for reheating. The control valve is controlled by an electronic regulator, which adjusts the amount of hot water supplied to the heat exchangers depending on the outdoor temperature, water temperature and air temperature in the building.

Regulation in such a heating system occurs in proportional mode, that is, when the radiators and rooms are cooled more, hot water constantly flows more and more all the time. The speed of the water depends on the temperature of the hot water and the temperature of the air outside the room. When the water speed is negligible, the hot water will be in the first batteries in the stream, and in the rest - cold. To mix water in the heating system, a circulation pump is used, which transports water along the closed ring of the building's heating system.

The disadvantage of this system is the low reliability of the design due to the presence of an electric pump that can stop when it shuts down

power supply. In addition, the presence of a pump increases the cost of completing a heat point and the cost of operating a heat point.

A known flow rate regulator used in an individual heating unit, taken as a prototype, the installation diagram of which in the heating unit is shown in [2].

An individual heat station consists of a hot water supply pipe, a cold water discharge pipe, mud collectors, a flow regulator, a pressure regulator, check valves, an elevator, temperature and pressure measuring instruments, and water and heat meters.

Hot water enters an individual heat point from the heat network through a non-return valve and a sump, then water enters the flow regulator and through the elevator and non-return valve to the heating devices of the building. Chilled water exits the radiators sequentially through a non-return valve, a sump, a water and heat meter. The purpose of all the listed devices and fittings is known and understandable from their name. The installed flow regulator performs the function of regulation in proportional mode. In proportional control mode, the water velocity in the pipes and elevator can be set or much less than set. If the water velocity in the elevator is less than the specified one, the elevator practically does not mix hot water that comes from the heating system with water cooled in heating batteries, and therefore the water will be hot in the first batteries and cold in the rest. This is the main disadvantage of regulating the flow of coolant in the heating system.

The development of a useful model of a coolant flow controller is based on the task of improving the quality of heating buildings by establishing an electromagnetic valve controlled by an electronic controller that delivers hot water with maximum flow pulses.

The task and the technical result are achieved by the fact that the solenoid valve of the normally open

type, and the control is carried out by an electronic controller by supplying hot water with pulses of maximum flow.

The essential features common with the prototype are: an actuator and a control electronic regulator.

The salient features of the claimed utility model of a flow rate controller providing a technical result are as follows:

- a normally open type solenoid valve controlled by an electronic regulator, which regulates the regulator by supplying hot water with pulses of maximum flow.

These significant distinguishing features provide the following result.

The supply of hot water to the heating system of the building with pulses of maximum flow rate ensures, due to the strong mix, uniform mixing of hot and chilled water, a portion of which enters the heating system. In the pause between pulses, mixed water is cooled throughout the system. The next impulse also ensures both the supply of hot water and its uniform mixing with chilled water. As a result, the heating system always receives uniformly mixed hot and chilled water, regardless of the average speed of the water in the heating system and in the elevator nozzle. This regulation mode creates uniform heating of the radiators throughout the building.

Figure 1 shows a diagram of the inventive regulator flow rate of the coolant mounted in an individual heat point.

An individual heating unit consists of a pipe 1 for supplying hot water and a pipe 2 for returning the return pipe, on which check valves 3, 4, 5 and 6 are installed to prevent reverse flows of water. A filter is installed in series on pipe 1

7, a heat and water meter 8, a regulator consisting of an electronic regulator 9 and an electromagnetic valve 9a, a mixing unit 10 (elevator). A pressure regulator 11, a heat and water meter 12, and a filter 13 are installed on the pipe 2. In addition, a thermometer 14, pressure gauges 15, 16, and 17 are installed on the pipe 1, and a thermometer 18 and a pressure gauge 19 are installed on the pipe 2.

The process of controlling the temperature in radiators is as follows. When water enters the heat point and the electronic controller 9 is turned on, the latter sends a command to open the electromagnetic valve 9a, through which the maximum flow rate of hot water enters. The maximum water velocity in the elevator nozzle 10 uniformly mixes cold water from the return line with hot. Heated water enters the heating batteries. The maximum speed in the elevator nozzle 10 uniformly mixes cold water from the return line with hot. After the set time, at the command of the electronic controller, the hot water supply is interrupted and after a specified pause, the electronic controller again issues a command to open. The alternation of pulses of hot water and pauses occurs until the temperature sensor 20 installed at the control point of the heating system produces a current equal to the current of the controller 9 regulator and the latter changes the frequency and duty cycle of the current pulses in the electromagnetic valve 9a.

Thus, uniformly mixed water has entered the heating batteries of the building throughout the entire heating system of the building and heat is transferred from the heating batteries to the building space. When the temperature in the return pipe drops to the lower set point, the controller will again begin to give out pulses of the initially set frequency and duty cycle to supply hot water to the heating system.

As a result, hot water enters the heating system of the building at an average rate corresponding to heat consumption, depending on weather conditions, but evenly and effectively mixed with cold.

Fluid flow controllers are used mainly in the public utilities sector.

Used sources:

1. Automation of heat supply systems using Danfoss regulators. Catalog of the company "Danfoss". VK.00.M3.50, 5/97 p. 95 - analogue.

2. V.P. Vitaliev, V. B. Nikolayev, N. N. Seldin. Operation of heat points and heat consumption systems. Reference book, M., Stroyizdat. 1988.

Claims (1)

The coolant flow regulator, consisting of an actuator and an electronic regulator, which ensures the functioning of the heating system, characterized in that the actuator is made in the form of a normally open type electromagnetic valve controlled by an electronic temperature regulator, which carries out regulatory actions by supplying hot water with maximum flow pulses.