RU2372560C1 - Water heating-system - Google Patents

Abstract

FIELD: heating. ^ SUBSTANCE: water heating-system consisting of hot and return pipes, pipe of air discharge, pipe of water discharge and complex of heating devices connected to each other hydrolically, installed on hot and return pipes one on each shut-off electric valves, as well as electronic control unit with system depressurisation sensors and two discharge electric valves and electric pump. Two discharge electric valves are installed, respectively, on hot and return pipes, after shut-off electric valves, outputs of discharge electric valves are connected to each other and to electric pump inlet, whose outlet is connected to sewage pipeline and electronic control unit contains system depressuarization sensors in form. ^ EFFECT: increase of rate of water discharge from water heating-system in case of its depressuarisation and increase of whole system reliability. ^ 2 cl, 1 dwg

Description

The invention relates to the field of heat engineering and can be used in automation of heating systems control.

Known devices for a water heating system according to the book "Effective heating systems for buildings" Stroyizdat, 1988 [1] and RF patent No. 2005105491 "Heating system for a multi-story building" [2].

The heating system of a multi-storey building according to [1] and [2] contains the supply and return pipes, the supply and return pipes connected to them, as well as the heating elements located in the premises of the multi-storey building, and the heating elements can be connected to the risers in two ways: where the heating elements are connected only to the supply risers and where the heating elements are connected only to the return risers.

A disadvantage of the known heating systems of a multi-storey building according to [1] and [2] is their potential danger during depressurization. As a result of this, premises with material values located in them (food and clothing stores, etc.), in some cases irreplaceable and expensive, of historical value (archives, museums, libraries, etc.) can be flooded. Moreover, depressurization of the water heating system can occur both naturally (by corrosion, overpressure of the network, defective valves, etc.), and during natural (earthquakes, fires, etc.) and terrorist or military operations.

It is known "Device that prevents freezing of the heating system of a building" according to RF patent No. 2006125921 - [3], containing a hot (inlet) pipe and an additional pipe with an open end cut into it through a controlled shut-off valve plate, and the control device is made in the form of an element made from a material with a shape memory effect, in which the transition point lies between room temperature and 0 ° C.

A disadvantage of the known device [3] is the impossibility of its use in accidents with depressurization of the heating system of a building.

The prototype of the claimed invention is "Water heating system" according to the patent of the Russian Federation No. 2313731, dated December 27, 2007, F24D 10/00 - [4], consisting of hot and return pipes, air discharge pipes, water drain pipes and a set of heating devices, hydraulically interconnected, on the hot and return pipes, one shut-off electrovalve is installed, and also contains an electronic control unit with system depressurization sensors and two drain solenoid valves and an electric pump. Moreover, one drain solenoid valve is installed to drain the fluid from the system, the other to supply air to the system, and the electric pump serves to fill the system with liquid drained into the tank. The depressurization sensors are made in the form of two flow meters mounted on the hot and return pipes, respectively.

The disadvantage of the prototype is that this system should have a tank for draining water, and this tank should be large, which is justified only in some cases (for example, when using antifreeze for local heating systems of individual houses). When used in a water heating system, the use of a collection tank is not economically feasible, and in some cases impossible because of the lack of the necessary space for its placement. In addition, the discharge of water in the prototype is carried out by gravity, which increases the time and volume of spillage of water into the premises and, as a result, increases material damage. In addition, it can be noted that during the subsequent (after the electronic control unit was triggered to drain the water) power outage, the water heating system according to [4] automatically returns to its original state, in which flooding of the premises continues. Due to the above, the known system according to [4] is applicable mainly only to individual houses. For multi-storey buildings and industrial facilities, the use of the system [4] is problematic.

These disadvantages of the prototype set the task of increasing the speed of draining water from a water heating system and the possibility of using this system for multi-story residential and industrial buildings, as well as improving the reliability of the entire system.

The essence of the invention lies in the fact that in a water heating system consisting of hot and return pipes, an air discharge pipe, a water drain pipe and a set of heating devices that are hydraulically interconnected with two shut-off solenoids installed on the hot and return pipes, containing electronic control unit with system depressurization sensors and two drain solenoid valves with electric pump,

two drain solenoids are installed respectively on the hot and return pipes after the shut-off solenoids, the outputs of the drain solenoids are connected to each other and to the input of the electric pump, the output of which is connected to the sewer pipe, and the electronic control unit contains depressurization sensors in the form of water detection sensors. Moreover, as shut-off and drain solenoid valves, valves with actuators from electric motors can be used.

The use of the distinguishing feature: “two drain electrovalves are installed respectively on the hot and on the return pipes after the shutoff electrovalves” is necessary so that in case of depressurization of the system, the maximum possible amount of liquid is drained from it and its spillage into the premises is prevented.

The connection of the outputs of the drain solenoid valves with each other and with the input of the electric pump, the output of which is connected to the sewer pipe, is necessary in order to accelerate the discharge of liquid into the sewer in case of depressurization of the system and thereby reduce the time and amount of spill. In this case, the electric pump is used only as a drainage pump.

The use of depressurization sensors in the system in the form of water detection sensors in the electronic control unit is necessary in order to timely switch the water heating system to the water drain mode and depressurize the pump and activate the drainage electric pump and drain the liquid from the water heating system. In this case, the minimum possible spills of water into the premises is achieved.

The use of valves with actuators from electric motors as shut-off and drain solenoid valves is necessary in order to exclude the subsequent (after the electronic control unit has turned off the water) power outage that automatically switches the water heating system to its original state (at which flooding of rooms can continue), which will increase the reliability of the entire heating system in the event of a power outage. At the same time, the use of a drainage electric pump as the working body, for example, the cheapest centrifugal pump, will allow water to freely drain into the sewer, only at a lower speed. In normal mode - the operation of the drainage electric pump in the heating system creates a vacuum, due to which the emission of water into the premises is minimal.

The drawing shows a diagram of a water heating system.

The water heating system consists of hot 1 and return pipes 2, an air discharge pipe with an automatic air vent 3, a water drain pipe 4 and a set of heating devices 5 that are hydraulically interconnected. On hot 1 and on return 2 pipes, one shut-off solenoid valve 6 (normally open) is installed. The water heating system also contains an electronic control unit 7 with depressurization sensors 8 (located under each heater 5), two drain solenoid valves 9 (normally closed) and a drain electric pump 10. Two drain solenoid valves 6 are installed respectively on hot 1 and return pipes 2 after shut-off solenoid valves 6. The outputs of the drain solenoid valves 9 are connected to each other and to the inlet of the drainage electric pump 10, the output of which is connected by a drain pipe 4 to the sewer pipe. The electronic control unit 7 contains sensors depressurization of the system in the form of sensors for detecting water 8. As shut-off and drain solenoid valves can be used valves with actuators from electric motors, which after disconnecting them from electricity do not change their state.

The operation of the proposed device is as follows.

In normal operation: water is supplied through a hot pipe 1 to a set of heating devices 5, hydraulically connected to each other, and discharged through a return pipe 2. On the air discharge pipe, the automatic air vent 3 is closed under the influence of water pressure. Through the shut-off solenoid valves 6 (normally open) installed on the hot 1 and return 2 pipes, water is circulated. In the water heating system, the electronic control unit 7 with depressurization sensors 8 (located under each heater 5) is constantly working. Two drain solenoid valves 9 (normally closed) are closed during normal operation, the drain pump 10 is turned off. The electronic control unit 7 contains sensors depressurization of the system in the form of sensors for detecting water 8.

When working on the drain, in case of depressurization: the electronic control unit 7 receives a signal from one or more depressurization sensors 8 (located under each heater 5), after which the electronic control unit 7 closes the shut-off solenoid valves 6 located on the hot 1 and return 2 pipes ( normally open). At the same time, it opens two drain solenoid valves 9 (normally closed) located on the pipe connecting the hot 1 and return 2 pipes to the inlet to the electric pump 10 (drainage), and also turns on the electric pump 10, after which the water drains into the sewer. At the same time, a vacuum (vacuum) is created in the water heating system, an automatic air vent 3 is opened, and water from the set of heating devices 5, hydraulically connected to each other, is quickly replaced by air. After a certain time, pre-set (when the water from the water heating system is guaranteed to be drained), the electronic control unit 7 turns off the electric pump 10, while the normally open shut-off solenoid valves 6 continue to be kept closed, and the two normally closed drain electro-valves 9 are kept open, for gravity draining water residues. In this mode, there is a danger of a power outage, in which the water heating system goes into normal operation and continues to flood the premises. To prevent this from happening, valves with actuators from electric motors are used as shut-off and drain solenoid valves, which, after disconnecting them from the electric power, do not change their state.

At the same time, when the water heating system is switched over, the electronic control unit 7 provides an alarm signal to the operating personnel.

Implementation of a device for a water heating system consisting of hot and return pipes, an air discharge pipe, a water drain pipe and a set of heating devices that are hydraulically interconnected with two shut-off solenoids installed on the hot and return pipes, containing an electronic control unit with system depressurization sensors and two drain solenoid valves with a drainage electric pump, which meets the criterion of "novelty", as it has not been previously used and is not found in literary sources.

The above set of features is not currently known from the prior art and does not follow from well-known water heating systems, and this proves compliance with the criterion of "inventive step".

The implementation of the proposed water heating system with the specified set of essential features does not present any structural, technical and technological difficulties, hence the compliance with the criterion of "industrial applicability" follows.

Thus, the application of the proposed invention allows:

- abandon the water tank, which occupies a large volume of the basement, which makes the system economically feasible;

- accelerate the drainage of water from the system with a drainage pump, which minimizes the material damage caused;

- use the system in multi-storey buildings, which is more relevant in modern industrial and civil engineering;

- provide for the problem of emergency power outages using electric valves, which can improve reliability;

- carry out a warning to service personnel about switching to emergency mode.

Literature

1. The book "Effective heating systems of buildings." Stroyizdat. 1988, fig. III. (4 in) p. 94.

2. RF patent No. 2005105491 of 08/10/2006, F24D 12/00. "Heating system of a multi-storey building."

3. RF patent No. 2006125921 dated 01/27/2008, F24D 19/00. "A device to prevent freezing of a building heating system."

4. RF patent No. 2313731 dated December 27, 2007, F24D 10/00. "Water heating system" is a prototype.

Claims (2)

1. Water heating system, consisting of hot and return pipes, air discharge pipes, water drain pipes and a set of heating devices hydraulically interconnected, are installed on the hot and return pipes with one shut-off solenoid valve, and also contains an electronic control unit with sensors depressurization of the system and two drain solenoid valves and an electric pump, characterized in that the two drain solenoid valves are installed respectively on the hot and return pipes after the shut-off solenoid valves solenoid drain connected together and to an input of an electric pump whose output is connected to the sewer line, and the electronic control unit comprises sensors depressurization system in the form of water detection sensors. 2. The water heating system according to claim 1, characterized in that as shut-off and drain solenoid valves, valves with actuators from electric motors are used.

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