RU2815997C1 - Universal hydrogroup for wall-mounted boiler and method of conversion thereof - Google Patents

Abstract

FIELD: heat power engineering.

SUBSTANCE: invention relates to the field of thermal power engineering, in particular to wall-mounted boilers for heating and preparation of hot water and can be used in decentralized and autonomous heating and hot water supply systems of private houses and flats in buildings with different height and number of floors. Technical result is achieved using a universal design of a hydrogroup, which allows installing a secondary heat exchanger for a double-circuit boiler and to install on the same seats a hydraulic adapter for a single-circuit boiler, which enables to connect an indirect heating boiler to the boiler. Switching between hot water heating and heating modes is carried out by means of a built-in three-way valve with an electric drive.

EFFECT: invention objective is production of universal hydrogroup and accordingly production of universal boilers based on this hydrogroup with possibility of conversion of double-circuit boiler into single-circuit boiler and vice versa.

1 cl, 2 dwg

Description

Field of technology to which the invention relates

The invention relates to the field of thermal energy, in particular to wall-mounted boilers for heating and preparing hot water, and can be used in decentralized and autonomous heating and hot water supply systems for private houses and apartments in buildings with different heights and number of floors.

State of the art

The state of the art in this area is characterized by various methods of converting boilers (see Larikov N.N. Heat engineering. - M.: Stroyizdat, 1985, Shchegolev M.M. et al. Boiler installations. M., Stroyizdat, 1972, Poretsky L.Ya. et al. Handbook of operators of gasified boiler houses. L., "Nedra, 1988)

Today there is a solution - a CASCADE SYSTEM AND A METHOD FOR CONTROLLING THE CASCADE SYSTEM AND THE HEATING BOILER INCLUDED IN THE CASCADE SYSTEM. It is a cascade system that can solve the problem of insufficient flow of heating water supplied from the boiler to the heating load side, due to a simplified design, when some boilers from a plurality of boilers selectively operate in accordance with the heat load. The purpose of the present invention is to provide a boiler exclusively for heating containing it and a method for controlling it. The cascade system of the present invention to accomplish this selectively operates according to the heating load and includes a boiler side pump that circulates the heating water and a heat exchanger that transfers the combustion heat of the burner to the heating water forced by the pump. In a cascade system with a boiler and a heating load pump for circulating heating water, a flow path of heating water that is pumped by the pump and returned through a heating water return pipe to a plurality of boilers is provided in the inlet direction of the heat exchanger. Alternatively, a three-way side is provided for selectively switching the direction of the heating water supply pipe connected to the heat exchanger outlet, and a control unit is provided for controlling the direction of the three-way side depending on the heating load. (Korea patent for invention KR101172215B1).

The disadvantage of this solution is the complexity of installing equipment as part of the entire boiler room.

Currently also known, Methods and System for Control of a Combination Boiler on Demand, refers to modular boiler control and, more specifically, to modular boiler control in which a master boiler is networked with at least one slave boiler to control the heating circuit of a building. (U.S. Patent No. US20070295830A1, publication date June 23, 2006 “Modular Boiler Control”). 2.1.3.2 From the prior art, solutions are known that describe a method including connecting control devices, i.e. control units, and functional components into an overall functional system. The individual components of a distributed thermal energy system are configured based on configuration requirements. One of the control devices can be defined as a master and the other device can be defined as a slave with respect to the functions of the individual components. Locally assigned components are controlled or regulated independently by the slave control device. Requests or information are sent locally to the master control device by the slave control device. Independent claims are also included for the following: a control device for operating a distributed thermal energy management system, a computer program with program code modules for executing a method of operating a distributed thermal energy system. (see German Patent for invention No. DE102010025157A1, according to IPC class G05B19/0421 application filing date and patent term start date 2010-06-25).

The disadvantage of this solution is the complexity of installing equipment as part of the entire boiler room.

In addition, the solution BOILER FOR HEATING AND/OR HOT WATER SUPPLY AND BOILER HEAT EXCHANGER is known, which is a group of inventions related to heat power engineering and can be used in the designs of boilers intended for heating and/or hot water supply. The technical result is the development of a boiler based on a reliable, universal and unified heat exchanger with high efficiency and increased heat transfer performance. For this purpose, in the boiler, the first heat exchanger of the heating circuit is made in the form of a water jacket, located at least along part of the perimeter of the combustion chamber, and includes a twisted coil of the hot water supply circuit installed in its cavity, and the second heat exchanger is made in the form of copper or based on copper alloy finned pipe located in the upper part of the combustion chamber and communicating with the first heat exchanger, wherein the internal cavity of the finned pipe is equipped with a number of vertical ribs, each of which includes upper and lower openings with a jumper between them, and communication between the heating circuit heat exchangers is made in the form of at least at least two pairs of pipes. (Patent of the Russian Federation for an invention No. RU 2 452 907 C1, according to IPC class F24H 1/08 (2006.01) application filing date and patent term start date 03/01/2011, publication date 06/10/2012).

The disadvantage of this solution is the low reliability of the heat exchanger and rapid clogging of the heat exchanger along the DHW circuit with hard water, as well as the impossibility of connecting an indirect heating boiler directly to the boiler.

Other examples of patented technical solutions for hydraulic groups for a wall-mounted boiler and conversion methods for gas boilers are also known from the prior art: DE102019123030A1, 2019-08-28; JP2017088225A 2017-04-27; RU2618157C1, 2013-05-24; DE3109670A1, 1980-03-27; and etc.

The closest solution in technical essence, chosen as a prototype of the research object, is a cascade system and a method for controlling a cascade system and a heating boiler containing a cascade system capable of solving the problem of lack of flow of heating water supplied from the boiler to the heating load side, due to a simplified design , when some boilers of a plurality of boilers are selectively operated according to the heat load. The purpose of the present invention is to provide a boiler exclusively for heating containing it and a method for controlling it. The cascade system of the present invention to accomplish this selectively operates according to the heating load and includes a boiler side pump that circulates the heating water and a heat exchanger that transfers the combustion heat of the burner to the heating water forced by the pump. In a cascade system with a boiler and a heating load pump for circulating heating water, a flow path of heating water that is pumped by the pump and returned through a heating water return pipe to a plurality of boilers is provided in the inlet direction of the heat exchanger. Alternatively, a three-way side is provided for selectively switching the direction of the heating water supply pipe connected to the heat exchanger outlet, and a control unit is provided for controlling the direction of the three-way side depending on the heating load.

A wall-mounted gas boiler for heating and/or hot water supply is known, containing an expansion tank and a sealed housing in which a combustion chamber with a gas burner, a heating circuit heat exchanger with a smoke box, a buffer tank with a hot water supply circuit heat exchanger, and pipes for supplying air to the firebox are located. gas burner and removal of combustion products located in the upper part of the boiler, coolant inlet and outlet pipes and water inlet and outlet pipes, and a control system, characterized in that the heating circuit heat exchanger includes a prismatic body with an open lower part, a tube sheet in the upper part and a coil on the outer surface, the smoke box at the point of its connection with the combustion product removal pipe is equipped with a channel connected to the internal cavity of the sealed housing, and the buffer tank is connected to the coolant outlet pipe and includes a prismatic body with a hot water supply circuit heat exchanger located inside it and its own supply pipes and coolant outlet and water inlet/outlet, while the buffer tank is moved outside the location of the heating circuit heat exchanger, placed in the lower part of the sealed housing and, through an additional pipe, through a valve switching to the “heating + hot water supply/hot water supply only” mode, connected to the coolant supply pipe , on which, after connecting it to the additional branch pipe of the buffer tank, a pump is installed (see. patent RU No. 2452906, IPC F24H 1/08, dated September 14, 2010).

The disadvantage of this boiler is the inability to connect an indirect heating boiler directly to the boiler, as well as the high metal consumption and large dimensions of the heat exchanger for heating hot water.

The proposed invention, compared to other known technical solutions, has the advantage that a gas boiler based on a universal hydraulic group has the ability to convert from a double-circuit version of the boiler to a single-circuit version and vice versa.

Disclosure of the invention

The objective of the proposed invention is the production of a universal hydraulic group and, accordingly, the production of universal boilers based on this hydraulic group with the possibility of converting a double-circuit boiler into a single-circuit one and vice versa.

The technical result is achieved using the universal design of the hydraulic group, which allows you to install a secondary heat exchanger for a double-circuit boiler and install a hydraulic adapter for a single-circuit boiler on the same seats, which allows you to connect an indirect heating boiler to the boiler. Switching between hot water heating and heating modes is carried out using a built-in three-way valve with an electric drive.

A double-circuit boiler is used for heating and preparing hot water in flow-through mode. A single-circuit boiler is used for heating and heating water through an indirect heating boiler.

A universal hydraulic group and a boiler based on this hydraulic group are a unique technical solution.

In order to convert a double-circuit boiler into a single-circuit one and install an indirect heating boiler, it is necessary to remove the secondary DHW heat exchanger 6 (see Fig. 1 and Fig. 2) and in its place install a special hydraulic adapter 10, remove the DHW flow sensor 9 and install a plug 11 .

In order to convert a single-circuit boiler into a double-circuit one, you need to install a secondary DHW heat exchanger 6 (see Fig. 1 and Fig. 2) instead of the hydraulic adapter 10, install a DHW flow sensor 9 instead of the plug 11.

Brief description of the drawings.

In fig. Figure 1 shows a diagram of a wall-mounted double-circuit convection-type gas boiler with an atmospheric burner and a closed combustion chamber.

In fig. Figure 2 shows a diagram of a wall-mounted single-circuit convection-type gas boiler with an atmospheric burner and a closed combustion chamber.

The drawings presented in Fig. 1 and Fig. 2 have continuous numbering of positions, namely: identical elements have the same position.

Implementation of a utility model.

The gas wall-mounted boiler has a closed combustion chamber 1 (see Fig. 1 and Fig. 2), combustion air enters through the coaxial chimney channel, combustion products are removed into the atmosphere using fan 2, when natural gas burns, heat exchanger 3 is heated using an atmospheric burner 4. The coolant heated in heat exchanger 3 is redirected using a three-way valve with an electric drive 5 to the heating circuit or to heating the secondary DHW heat exchanger 6 for a double-circuit boiler or to heating an indirect heating boiler for a single-circuit boiler. The universal hydraulic group is shown at position 7, which includes the main hydraulic components of the boiler, made of cast polyamide, reinforced with fiberglass, and a circulation pump 8, which ensures the circulation of the coolant in the heating circuit. A DHW flow sensor 9 is installed at the cold water inlet, which, if there is a flow in the DHW circuit, gives a command to switch the three-way valve with electric drive 5 to heat the DHW. For a single-circuit boiler, as part of hydraulic group 7, a hydraulic adapter 10 and a plug 11 are installed instead of a hot water flow sensor 9. The fittings for supplying coolant to the heating system and returning coolant from the heating system are marked with the letters “A” and “D”, respectively (see Fig. 1 and Fig.2). The cold water inlet fitting into the boiler is marked with the letter “G” (see Fig. 1), the hot water outlet fitting from the boiler is marked with the letter “B” (see Fig. 1) for a double-circuit boiler. The coolant supply fitting for heating the indirect heating boiler is designated by the letter “B” (see Fig. 2), the coolant return fitting from the indirect heating boiler is designated by the letter “G” (see Fig. 2) for a single-circuit boiler.

Claims (1)

A universal hydraulic group for a wall-mounted gas wall-mounted boiler, consisting of plastic housing parts, a three-way valve with an electric drive, a circulation pump, characterized in that the hydraulic group can be converted from a double-circuit version for heating hot water in flow mode to a single-circuit version for heating hot water using an indirect heating boiler , in this case, the conversion is carried out by replacing the secondary heat exchanger with a hydraulic adapter and back from a single-circuit version to a double-circuit one, and replacing the secondary heat exchanger with a hydraulic adapter is carried out by removing the secondary DHW heat exchanger and installing a hydraulic adapter in its place, followed by removing the DHW flow sensor and installing a plug.

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