RU203004U1 - WALL-MOUNTED CONVECTION GAS BOILER FOR APARTMENT HEATING WITH DOUBLE-WALL ATMOSPHERIC BURNER - Google Patents

Abstract

The utility model relates to the field of thermal energy, in particular to wall-mounted boilers for heating and hot water preparation, and can be used in decentralized and autonomous heating and hot water supply systems for apartments in buildings with different heights and storeys. The objective of the proposed utility model is to develop a device, operating in different power modes: for the preparation of hot water, the required power is 20-24 kilowatts; for heating apartments of a small area from 50 to 60 square meters, the required power is 3-6 kilowatts. The technical result is achieved by dividing the burner of a gas boiler into two zones. The first - the central part of the burner, is intended only to provide heating, the second - combustion over the full area - to ensure the hot water preparation mode. Combustible gas is supplied to the combustion zones by means of electromagnetic gas valves controlled by the boiler operation control system. The proposed utility model, in comparison with the prototype and other well-known technical solutions, has the advantage of a higher energy efficiency coefficient and reduces greenhouse gas emissions arising from the operation of boilers. heating and hot water supply systems.

Description

Technical field to which the utility model belongs

The utility model relates to the field of thermal energy, in particular to wall-mounted boilers for heating and hot water preparation and can be used in decentralized and autonomous heating and hot water supply systems for apartments in buildings with different heights and storeys.

State of the art

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

The disadvantages of this boiler are low reliability, low energy efficiency, large dimensions, the intake of air required for combustion comes directly from the atmosphere.

The closest in terms of the set of essential features and the function performed is a commercially available hot water boiler designed for separate heating and hot water supply of apartments in multi-storey residential buildings and individual residential buildings, with systems of natural and forced water circulation. The boiler contains an expansion tank and a sealed casing, which houses a combustion chamber with a gas burner, a heat exchanger for a heating circuit with a smoke box, a buffer tank of rectangular cross-section with a heat exchanger (coil) for a hot water supply circuit, pipes for supplying air to the furnace to the gas burner and removing 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 that includes a tipping traction sensor and a gas burner safety unit (see patent RU No. 88113, IPC F24H 1/08, dated 24.06.2009) ... The boiler features improved performance, reliability and ease of maintenance. The hermetically sealed housing excludes air intake from the internal volume of the room.

The disadvantage of this solution is the inability to function effectively with a large difference in the required amount of thermal power for heating and hot water supply modes, which is typical for the use of boilers for apartment heating in apartment buildings.

It is known from open sources (Toropov A.L., Wall-mounted gas boilers of autonomous heating systems. History of creation. Basic elements. Classification. Part 2. Condensing wall-mounted gas boilers. - M .: Publishing house of the Academy of Natural Sciences, 2020. - 68 p. ISBN 978-5-91327-642-1 DOI 10. 17513 / pr.417, p. 56). The standard is a boiler with a maximum heating capacity of 24 kilowatts. This is due to the fact that this power is necessary to prepare a comfortable amount of hot water for individual consumption. However, boilers with a capacity of 24 kilowatts can heat a room with an area of 250 square meters. If a wall-mounted boiler is used for heating premises with an area of 50-60 square meters, then it will never work at full load in heating mode. And the really necessary, average power in heating mode will not be 30% or 55% of the maximum boiler power, but 10%.

When using wall-mounted convection gas boilers for apartment heating, the atmospheric burner is designed both to provide heating and to prepare hot water. However, when using these boilers for heating apartments with an area of 50-60 square meters in multi-apartment multi-storey buildings, the power required for heating is at most 3-5 kilowatts. Multi-flame atmospheric burners used in boilers of this design have a minimum power of 7 kilowatts. Consequently, the burners are able to heat the premises of apartments of a given area only in the mode of constant on-off, which is ineffective and is accompanied by the maximum emissions of greenhouse gases arising from the combustion of natural gas.

Disclosure of the essence of the utility model

The task of the proposed utility model is to develop a device operating in different power modes:

for the preparation of hot water, the required power is 20-24 kilowatts;

for heating small apartments from 50 to 60 square meters, the required power is 3-6 kilowatts.

Since the control range of atmospheric burners of convection boilers in the range of 3-24 kilowatts is not possible, it is proposed to make the gas multi-flame burner dual-range. The first range of 3-6 kilowatts is intended for heating and the second range up to 24 kilowatts is intended for hot water preparation. The second range is connected using an additional gas valve, which supplies combustible gas to the combustion zone of the burner to ensure maximum power.

The technical result is achieved by dividing the gas boiler burner into two zones. The first - the central part of the burner, is intended only to provide heating, the second - combustion over the full area - to ensure the hot water preparation mode. Combustible gas is supplied to the combustion zones by means of electromagnetic gas valves controlled by the boiler control system.

Brief description of the drawings.

FIG. 1 shows a diagram of a wall-mounted convection-type gas boiler with an atmospheric multi-flame burner and a closed combustion chamber.

Implementation of the utility model.

The wall-mounted gas boiler has a closed combustion chamber 1, combustion air enters through the coaxial chimney channel 2, the combustion products are removed to the atmosphere through channel 3 using the fan 4, when natural gas burns, heat exchanger 5 is heated using a two-stage burner 6. For heating, a central part of the burner 7, to prepare hot water, burner 8 is connected to zone 7. Zones 7 and 8 are separated by partitions 9. Combustible gas enters the combustion zones through gas supply pipes 10 and 11. Gas is supplied to the combustion zone for hot water preparation from using gas valve 12, to the combustion zone for heating - using gas valve 13. The general gas supply for the boiler is supplied through pipeline 14.

The proposed utility model of a wall-mounted gas boiler with a two-stage atmospheric burner, in comparison with the prototype and other known technical solutions, has an advantage in a higher energy efficiency coefficient, since it provides the boiler operation in two ranges, separately for heating and separately for preparing hot water.

Claims (2)

1. Wall-mounted gas convection boiler, consisting of a burner, a heat exchanger, a flue gas exhaust fan, equipped with an asynchronous electric motor with a constant rotor speed, characterized in that the atmospheric multi-flame burner is divided into two zones intended for space heating and hot water preparation , the supply of combustible gas to each zone is carried out through separate pipelines. 2. Wall-mounted gas boiler of convection type according to claim 1, characterized in that the supply of combustible gas to the zone intended for the preparation of hot water is carried out using a separate electromagnetic gas valve.

Images