RU2621438C1 - Outdoor-type boiler - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: outdoor-type boiler contains heat moistureproof housing 1, inside which the following is installed: three-way heat exchanger 2 with the outer surface 7 of the third stroke performed without thermal insulation, the blow torch 3, coaxially positioned with the three-way heat exchanger 2, fume collection tube 4, on which the chimney 5 is mounted. The heat moistureproof housing 1 also contains the air intake grid 6. At least one gas hose 8, made of flexible thin-walled corrugated pipe is wound on the uninsulated outer surface of the heat exchanger 7 along the helix.

EFFECT: gas extra heating, supplied to the combustion, gas flow rate decrease.

2 cl, 2 dwg

Description

FIELD OF THE INVENTION

The invention relates to the production of hot water boilers, in particular to outdoor boilers with a blast burner, and can be used in autonomous heating systems with forced and natural circulation of the coolant.

State of the art

Known boiler installation for external use, containing a thermally insulated fire tube boiler with a pipe for removing combustion products, pipes for a direct and reverse water line, a combustion chamber into which a burner is inserted, placed in a thermally insulated casing having openings for air intake, while the boiler is inside a thermally insulated casing has areas free of thermal insulation (see US Pat. RU No. 96415, IPC F25D 11/02, F25B 39/02 publ. 07.27.2010).

The disadvantage of this boiler is the lack of heating of the air entering the combustion at temperatures up to -45 ° C in the winter.

Known condensation boiler for outdoor use, containing a thermally insulated body with a gas burner inside, a heat exchanger of the boiler with direct and return lines, a chimney, a direct and return line of the building heating system, characterized in that it is additionally equipped with a heat exchanger of the condensate part of the boiler and a circulation pump, the heat exchanger of the condensate part of the boiler is located in the lower part of the chimney of the boiler and connected to the return line of the building heating system and the return line excluding, and the circulation pump is installed in the return line of the building heating system with the possibility of forced circulation of the coolant, and in parallel the heat exchanger of the condensate part of the boiler is connected to the direct and return lines of the boiler through non-return valves with normally open passage with the possibility of natural circulation in the two heat exchangers of the boiler when stop the circulation pump (see US Pat. RU No. 2440538, IPC F24H 1/00, publ. January 20, 2012).

The disadvantage of this boiler is the high cost of heat production and low power.

A well-known outdoor boiler comprising a thermo-insulated casing with a fire tube heat exchanger of a boiler with a furnace, a direct and return line, a blow torch, a grill for external air, the fire tube heat exchanger is made two-way and is installed horizontally with a coaxially located blow torch inside the heat-insulated casing ( see Pat. RU No. 155744, CL F24H 1/22, publ. 20.10.2015).

The disadvantage of this heat exchanger is the lack of heating of the air supplied to the boiler for combustion at temperatures up to -45 ° C in winter, poor-quality gas combustion and its increased consumption.

A well-known outdoor boiler comprising a thermo-insulated casing with a fire tube heat exchanger of a boiler with a furnace, a direct and return line, a blow torch, a grill for external air, and the fire tube heat exchanger is made three-way and is installed horizontally with a coaxially located blow torch inside the heat-insulated casing ( see Pat. RU No. 158958, IPC F24H 1/22, publ. 01.20.2016).

The disadvantage of this device is the lack of heating of the air supplied to the boiler for combustion at temperatures up to -45 ° C in winter, poor-quality gas burning and its increased consumption.

The closest in technical essence and the achieved positive effect and accepted by the author for the prototype is an outdoor boiler containing a thermally insulated body with a service door, an air intake grill, a fire tube boiler placed in it, a chimney base, a soot cleaning hatch, direct and reverse lines gas burner device, while it is additionally equipped with a thermally insulated panel for attaching a blast burner, made with the possibility of interchangeability, and under the firebox Nogo boiler made of a heat-resistant material (see. US Pat. RU №114359, IPC F24H 1/00, publ. 20.03.2012 g).

The disadvantage of this boiler is the high cost of its manufacture, the fragility of the heat exchangers of the boiler, as well as the lack of heating of the air supplied to the boiler at a temperature of -45 ° C during the winter period, poor-quality gas burning and its increased consumption.

Disclosure of invention

The objective of the invention is to develop an outdoor boiler with additional heating of the gas entering the combustion due to the fact that at least one gas supply is wound onto the uninsulated surface of the three-way heat exchanger in a helical spiral, which also gives better combustion of gas with heated air, reduction in gas consumption.

The technical result, which can be obtained using the present invention, is reduced to additional heating of the gas entering the combustion, better burning of gas with heated air, and reducing gas consumption.

The technical result is achieved using an external boiler containing a thermally insulated casing, inside of which there is a three-way heat exchanger with an external surface of the third stroke, made without thermal insulation, a blow burner located coaxially with a three-way heat exchanger, an air intake grille, a smoke outlet, and a non-insulated surface of a three-way at least one gas inlet is wound along the helical coil of the heat exchanger.

In the boiler, at least one gas supply is made of a corrugated thin-walled pipe.

Thus, the technical result is achieved due to the fact that the outer surface of the third pass of the flue gases of the three-way heat exchanger is made without warm insulation, on the non-insulated surface of which at least one gas supply is wound along a spiral spiral made of a flexible corrugated thin-walled pipe, which allows intensive heating of the gas supplied to combustion, better combustion of heated gas with heated air, reducing gas consumption.

Brief Description of the Drawings

In FIG. 1 Dan outdoor boiler, general view.

In FIG. 2 - the same, at least one gas inlet made of a flexible corrugated thin-walled pipe.

The implementation of the invention

The outdoor boiler consists of a thermo-insulated housing 1, inside of which there is a three-way heat exchanger 2 with an outer surface of the third stroke, made without thermal insulation, a blow torch 3, located coaxially with the three-way heat exchanger 2, a flue pipe 4 on which a chimney 5 is mounted, a thermo-insulated case 1 also contains an intake grille 6, while the outer surface 7 of the third stroke of the three-way heat exchanger 2 is made without thermal insulation, on non-insulated at least one gas inlet 8 wound from a flexible corrugated thin-walled pipe (not indicated), the gas inlet 8 is connected on one side to the external gas pipeline 9, and on the other side to the gas pipeline (not indicated) burner 10 using a threaded connection 11, the latter contains a threaded sleeve 12 with a tapered surface, a flexible element 13, a locking ring 14, a union nut 15, while the outer surface 7 of the third flue gas passage three-way heat exchanger And 2 is made without thermal insulation, which makes it possible to intensively heat the gas entering the combustion due to the fact that at least one gas inlet 8 is wound onto the uninsulated surface of the three-way heat exchanger 2 along the spiral spiral, and at the same time heating the cold air entering the combustion through the air intake grille 6, which falls down the heat-insulated casing 1, is in contact with the non-insulated surface 7 and is heated, which gives better combustion of gas with heated air and reduced gas consumption.

The outdoor boiler operates as follows.

A blow burner 3 in a three-way heat exchanger 2 installed inside a thermally insulated housing 1 generates heat, flue gases wash the heating surface of the three-way heat exchanger 2 and are removed through the flue pipe 4 into the chimney 5 in the third stroke, the external air for combustion enters through the intake grate 6, gas having a temperature of -45 ° C during the winter period, comes from the external gas pipeline 9, passes through one gas inlet 8 installed along a helical spiral, along which at least one and the gas inlet 8, made of a flexible corrugated thin-walled pipe located inside a thermally hydroinsulated housing 1, is heated by the non-insulated surface 7 of the third stroke of the three-way heat exchanger 2 and enters the gas pipeline of the burner 10 in a heated form, with the outside air having a temperature of -45 in winter ° C and entering through the intake grille 6 for external air to enter, falls down the heat-insulated housing 1, is in contact with the third non-insulated surface 7 about the course of the flue gases of the three-way heat exchanger 2, it is heated, rises, mixes in the upper part of the intake grill 6 for incoming air with cold outside air and enters the fan (not shown) of the blow torch 3 where it is mixed with heated gas and such in the way provides high-quality gas combustion in the furnace (not indicated) of the three-way heat exchanger 2, and the tightness of the gas supply 8 is provided by threaded connections 11 due to crimping of the flexible element 13 on idle nut 15 through the retaining ring 14 through the conical surface of the threaded sleeve 12, and the extension of the flexible gas inlet 8 due to heating does not cause additional loads in the threaded connection 11 due to the flexibility of the corrugated thin-walled (0.5 mm) stainless pipe of the gas inlet 8, the number of gas inlet 8 may vary depending on the power of the blower burner 3, for example from 1 to 4, while the efficiency of the boiler also increases due to the use of the temperature of the exhaust flue gases.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- additional heating of the gas entering the combustion;

- additional heating of the air entering the combustion;

- high-quality combustion of gas with heated air;

- reduction in gas consumption;

- increase the durability of the outdoor boiler to the life of the boiler, that is, up to 15 years;

- providing chimney draft during the start-up and operation of the boiler;

- cheaper heat production;

- improving the reliability of the boiler;

- fuel economy by 15-20%.

Claims (2)

1. An outdoor boiler comprising a thermally insulated body, inside of which there is a three-way heat exchanger with an external surface of the third stroke, made without thermal insulation, a blow burner located coaxially with the three-way heat exchanger, an air intake grill, a smoke outlet, characterized in that on the non-insulated surface of the three-way heat exchanger at least one gas supply is wound along a helical spiral. 2. The boiler according to claim 1, characterized in that at least one gas supply is made of a corrugated thin-walled pipe.

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