CN2351705Y

CN2351705Y - Automatic oil (gas) combustion central water heater

Info

Publication number: CN2351705Y
Application number: CN 98231225
Authority: CN
Inventors: 胡恢
Original assignee: Jingfa Refrigerating & Air-Conditioning Industry Co Ltd Hengyang
Current assignee: Jingfa Refrigerating & Air-Conditioning Industry Co Ltd Hengyang
Priority date: 1998-08-22
Filing date: 1998-08-22
Publication date: 1999-12-01
Anticipated expiration: 2008-08-22

Abstract

The utility model relates to an automatic fuel oil (gas) central water heater, comprising a combusting machine (1), a heat transferring pipe bundle (2), a furnace body (3), a hearth (4), a smoke returning chamber (5), a flue (6) and a smoke expelling opening (7). The furnace body is provided with a water inlet (8) and a water outlet (9), the heat transferring pipe bundle is installed in the flue at the vertical direction, both ends of heat transferring pipes are communicated with the water containing cavity of the furnace body, the adjacent three heat transferring pipes are distributed forming an approximate equilateral triangle and are mutually staggered at the smoke flowing direction. The utility model has the advantages of small size, light weight, little possibility of scale deposit formation of the inner walls of the heat transferring pipes, high heat transfer efficiency, little possibility of charcoal deposit formation of the outer walls of the heat transferring pipes, etc.

Description

Automatic fuel oil (gas) central heater

The utility model relates to a kind of burner, particularly a kind of automatic fuel oil (gas) central heater.

Existing automatic fuel oil (gas) central heater generally adopts a kind of horizontal fire tube version, and high-temperature flue gas flows in heat-transfer pipe, conducts heat through heat-transfer pipe, the water heating that heat-transfer pipe is outer.Its weak point is:

1, big, the Heavy Weight of unit volume: because flue gas resistance is less in the heat-transfer pipe, be unfavorable for the flue gas disturbance, the heat exchange weak effect is so have to strengthen heat exchange area and flue gas backhaul number of times, in order to fully absorbing flue gas heat, so just cause the increasing of unit volume and weight;

2, the heat-transfer pipe outer wall easily forms incrustation scale, and heat transfer efficiency is low: the current of heat-transfer pipe because of be subjected to heat-transfer pipe to influence resistance bigger, can not be at the outer double loop state that forms of pipe, so the flow velocity of water is slow, very easily at heat-transfer pipe outer wall formation incrustation scale and influence heat-transfer effect;

3, the heat-transfer pipe inwall easily forms the charcoal dirt: the flue gas in the heat-transfer pipe is because of can not disturbance peeling off formed charcoal dirt, so unit must carry out snaking every certain hour.

The purpose of this utility model is to overcome above the deficiencies in the prior art part and a kind of automatic fuel oil (gas) central heater vertical water pipe double loop structure is provided.

The technical solution of the utility model: fuel oil (gas) central heater is made up of the burner hearth that is divided into by body of heater in combustor, heat transfer tube bundle, body of heater and the body of heater, time smoke-box, flue and exhaust opening automatically, water inlet and delivery port are arranged on the body of heater, burner hearth is located at the body of heater bottom, the one end is equipped with combustor, the other end is communicated with the smoke-box that returns that is located at upper of furnace body one end, go out 1 mouthful of other end that is located at upper of furnace body, flue is located at the centre of upper of furnace body, the heat transfer tube bundle becomes vertical direction to be installed in the flue, and the two ends of heat-transfer pipe are communicated with the body of heater water containing chamber.

The further technical scheme of the utility model is: adjacent three heat-transfer pipes of heat transfer tube bundle become approximate equilateral triangle to distribute, and stagger mutually in the flow of flue gas direction.

The utility model compared with prior art, has following technical characterictic owing to adopt as above design:

1, unit volume is little, and is in light weight: owing to adopt two return structures, so littler than three return structures volumes, in light weight;

2, the heat-transfer pipe inwall is difficult to form incrustation scale, heat transfer efficiency height: because the heat transfer tube bundle becomes vertical direction to be installed in the flue, the flue-gas temperature at flue middle part is very high, form one deck vapour phase film between heat-transfer pipe inwall and the current, this steam film drives current and upwards flows with very high speed from roof of the furnace (heat-transfer pipe bottom), because washing away of high-velocity flow, the heat-transfer pipe inwall is difficult to form incrustation scale, when current reach flue top, temperature decrease, steam film condenses into hot water, because the water outlet bore is very little, high-velocity flow forms the relatively high pressure district on flue top, area between flue bottom and the burner hearth is bigger simultaneously, because the swabbing action of high speed upward water flow in the heat-transfer pipe, here form relative negative pressuren zone, under this pressure differential, the water of higher-pressure region, top flows to negative pressuren zone through the low temperate zone of flue both sides and forms second circulation (water flows to roof of the furnace and the circulation that forms is first circulation from burner hearth bottom), this vertical water pipe double loop structure helps water circulation heating, can not form the liquid storage dead angle, and heat-transfer pipe inwall non-scaling, the heat transfer efficiency height;

3, the heat-transfer pipe outer wall is difficult to form the charcoal dirt: because the heat-transfer pipe that the high-temperature flue gas in the flue is interspersed forces disturbance, crock on the heat-transfer pipe had the effect of peeling off, make unit remain on optimum state constantly and conduct heat, so be difficult to outside heat-transfer pipe, form the charcoal dirt.

Below in conjunction with drawings and Examples detailed structure of the present utility model is further described.

Accompanying drawing 1 is a Facad structure schematic diagram of the present utility model.

Accompanying drawing 2 is a left TV structure schematic diagram of the present utility model.

As shown in Figures 1 and 2: fuel oil (gas) central heater is by combustor (1) automatically, heat transfer tube bundle (2), body of heater (3), burner hearth (4), return smoke-box (5), flue (6) and exhaust opening (7) are formed, water inlet (8) and delivery port (9) are arranged on the body of heater, burner hearth (4) is located at body of heater (3) bottom, the one end is equipped with combustor (1), the other end is communicated with time smoke-box (5), return smoke-box (5) and be located at the end on body of heater (3) top, exhaust opening (7) is located at the other end on body of heater (3) top, flue (6) is located at the centre on body of heater (3) top, heat transfer tube bundle (2) becomes vertical direction to be installed in the flue (6), the two ends of heat-transfer pipe are communicated with the body of heater water containing chamber, its adjacent three heat-transfer pipes become approximate equilateral triangle to distribute, and stagger mutually in the flow of flue gas direction.

During use, after water entered body of heater (3) water containing chamber from the water inlet (8) on the body of heater (3), continuing to flow from burner hearth (4) bottom formed first circulation to burner hearth (4) top.Subsequently, Yin Gaowen between heat-transfer pipe inwall and the current and the vapour phase film that forms drive current and upwards flow from burner hearth (4) top with very high speed, form the higher-pressure region on the very little flue of water outlet bore (6) top because of temperature decrease condenses into hot water after reaching flue (6) top; Simultaneously, flue (6) bottom and burner hearth (4) top because of area in the big and heat-transfer pipe swabbing action of high speed upward water flow form relative negative pressuren zone, cause the water of higher-pressure region, top to flow to negative pressuren zone and form second circulation through the low temperate zone of flue (6) both sides.

Claims

1, a kind of automatic fuel oil (gas) central heater, it is characterized in that by the burner hearth that is divided into by body of heater in combustor, heat transfer tube bundle, body of heater and the body of heater, return smoke-box, flue and exhaust opening are formed, water inlet and delivery port are arranged on the body of heater, burner hearth is located at the body of heater bottom, the one end is equipped with combustor, the other end is communicated with the smoke-box that returns that is located at upper of furnace body one end, outlet flue is located at the other end of upper of furnace body, flue is located at the centre of upper of furnace body, the heat transfer tube bundle becomes vertical direction to be installed in the flue, and the two ends of heat-transfer pipe are communicated with the body of heater water containing chamber.

2, as a kind of automatic fuel oil (gas) central heater of claim 1, adjacent three heat-transfer pipes of the tube bundle that it is characterized in that conducting heat become approximate equilateral triangle to distribute, and stagger mutually in the flow of flue gas direction.