CN109695956A

CN109695956A - Gas heater

Info

Publication number: CN109695956A
Application number: CN201711005627.6A
Authority: CN
Inventors: 梁泽锋; 寿利萍; 梁国荣
Original assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2017-10-24
Filing date: 2017-10-24
Publication date: 2019-04-30

Abstract

The present invention discloses a kind of gas heater, it include: shell, with a combustion chamber, and with the air inlet of the combustion chamber, the first air inlet and the second air inlet, first air inlet is arranged close to the outer casing bottom, second air inlet is arranged close to the cover top portion, and first air inlet and second air inlet are connected to feeder；Burner is set in the combustion chamber, and between first air inlet and second air inlet；And catalyst converter, it is set in the combustion chamber, and be located above second air inlet, the catalyst converter is equipped with catalyst.Technical solution of the present invention can reduce the content of CO and NOx in flue gas.

Description

Gas heater

Technical field

The present invention relates to field of water heaters, in particular to a kind of gas heater.

Background technique

The heating method of gas heater is to carry out burning generation heat with air to be heated, due to this using fuel The characteristic of kind of heating method itself, when fuel and air burning, especially under conditions of burning is not enough, can generate compared with More CO and NOx, such harmful substance are discharged into outside with flue gas together, cause greatly to endanger to environmental and human health impacts Evil.

Summary of the invention

The main object of the present invention is to propose a kind of gas heater, it is intended to reduce the content of CO and NOx in flue gas.

To achieve the above object, gas heater proposed by the present invention, comprising:

Shell, have a combustion chamber, and with the air inlet of the combustion chamber, the first air inlet and the second air inlet, First air inlet is arranged close to the outer casing bottom, and second air inlet is arranged close to the cover top portion, and described First air inlet and second air inlet are connected to feeder；

Burner is set in the combustion chamber, and between first air inlet and second air inlet；With And

Catalyst converter is set in the combustion chamber, and is located above second air inlet, and the catalyst converter includes matrix, Described matrix is equipped with catalyst.

Preferably, at second air inlet be equipped with air inlet pipe, the air inlet pipe be equipped with switch valve, the switch valve with The controller of the gas heater is electrically connected.

Preferably, described matrix is equipped with multiple burner ports through its upper and lower surface, the hole wall of each burner port It is equipped with the catalyst.

Preferably, the outer peripheral edge of the catalyst converter and the inner wall of the combustion chamber seal against.

Preferably, the catalyst converter further includes the outer peripheral surface enclosed set on described matrix, and the peripheral frame fixed with described matrix, The peripheral frame and the inner wall of the combustion chamber seal against.

Preferably, the upper and lower ends of the peripheral frame are equipped with the limit flange extended inwardly, and the two limit flange are common Clamp described matrix.

Preferably, the outer peripheral surface of described matrix is coated with insulating layer, and the insulating layer is located at the peripheral frame and described matrix Between.

Preferably, the inner wall of the combustion chamber and be circumferentially equipped with overlap joint protrusion, the catalyst converter lap hermetically in The top surface of the overlap joint protrusion.

Preferably, the gas heater further includes the heat exchanger above the burner, and the catalyst converter is located at The top of the heat exchanger.

Preferably, the catalyst is the catalyst containing Pt, Pb, Ce, La, Ba, Sr, Zr, Cu or Mn.

In the present invention, due to having opened up the second air inlet in the position of neighbouring catalyst converter, combustion gas, air and combustion gas are supplemented After the flue gas generated that burns at burner rises to catalyst converter, it is catalyzed with the combustion gas supplemented from the second air inlet, flue gas In carbon monoxide carbon dioxide is generated in conjunction with oxygen in air by catalytic action, to reduce carbon monoxide in flue gas Content.And the nitrogen oxides in flue gas ultimately generates nitrogen, titanium dioxide with methane reaction then under combustion gas, the reduction of namely for methane Carbon and water, to greatly reduce the discharge of carbon monoxide and nitrogen oxides in flue gas.Meanwhile the reducing agent methane in the present invention From feeder, does not need additionally to be supplemented from other positions, have the effect of simple and reliable for structure.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with The structure shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the structural schematic diagram of one embodiment of gas heater of the present invention；

Fig. 2 is the top view of catalyst converter in Fig. 1；

Fig. 3 is catalyst converter in Fig. 2 along the cut-away illustration of A-A；

Fig. 4 is the cut-away illustration of the burner port of catalyst converter in Fig. 2.

Drawing reference numeral explanation:

Label	Title	Label	Title
				10	Shell	34	Peripheral frame
11	Combustion chamber	341	Limit flange
				12	Air inlet	35	Insulating layer
13	First air inlet	40	Intake valve
				14	Second air inlet	50	Switch valve
20	Burner	60	Blower
				30	Matrix	70	Water pipe
31	Burner port	80	Heat exchanger
				32	Catalyst	90	Controller
33	Carrier

The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.

It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention, Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship, Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.

In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution Conjunction is not present, also not the present invention claims protection scope within.

The present invention proposes a kind of gas heater, as shown in Figure 1, the gas heater includes shell 10, the shell 10 have a combustion chamber 11, the air inlet 12 being connected to respectively with the combustion chamber 11, the first air inlet 13 and smoke outlet.Described One air inlet 13 is arranged close to 10 bottom of shell, and and feeder, as fuel cartridge is connected to.In general, described first into Intake valve 40, the working condition that the controller 90 of the gas heater passes through the control intake valve 40 are additionally provided at port 13 To control 13 air inlet of the first air inlet or stop air inlet.It is typically provided with blower 60 at the air inlet 12, it will be extraneous empty Gas is pumped into the combustion chamber 11, and generally, blower 60 is mounted on the lower section of combustion chamber 11 to pump up air.In general, To mix with air combustion gas more sufficiently, combustion gas mixing is additionally provided in the combustion chamber 11 and below burner 20 Device (not shown go out).The mixed gas outlet that the fuel gas mixer has a mixing chamber and is connected to mixing chamber, air inlet 12 It is connected to mixing chamber with the first air inlet 13.After combustion gas mixes in the mixing chamber with air, from the mixed gas outlet Discharge, and ignition is carried out on the burner 20, to discharge heat, so that the water pipe 70 in combustion chamber 11 be added Heat, the flue gas after burning then pass through the smoke outlet discharge at 11 top of combustion chamber.Preferably, the mixed gas outlet is located at the combustion The top surface of gas mixer, with 20 outlet air of burner described in face.The mixed gas outlet preferably have it is multiple so that demeanour out It encloses greatly, and outlet air is more uniform.

In general, being additionally provided with heat exchanger 80 above burner 20, water pipe 70 is interspersed on heat exchanger 80, and burner 20 is logical It crosses heating heat exchanger 80 and carrys out heating pipe 70, to improve heat exchange efficiency.

Further, the second air inlet 14 being connected to the combustion chamber 11, second air inlet are additionally provided on shell 10 Mouth 14 is arranged at the top of the shell 10, and is connected to feeder.Burner 20 is located at first air inlet 13 and institute It states between the second air inlet 14.Incorporated by reference to referring to figs. 2 to Fig. 4, the gas heater further includes catalyst converter, and catalyst converter is set to institute It states in combustion chamber 11, and is located at 14 top of the second air inlet, the catalyst converter includes matrix 30, and matrix 30 is equipped with catalysis Agent 32.

In the embodiment of the present invention, described matrix 30 usually in bulk, such as square, certainly, the present invention in this and without It limits.The heat-conducting that the metal alloys such as copper, aluminium or steel preferably can be used in described matrix 30 is made into, to heat in burned device 20 When can more preferably transfer heat to catalyst 32.Catalyst 32 can specifically apply the bottom surface and side for being located at matrix 30, or in base Multiple through-holes are set on body 30, and catalyst 32 is applied on the hole wall of through-hole.

First air inlet 13 is usually to be connected to the same feeder with the second air inlet 14, certainly, the first air inlet 13 and second air inlet 14 can also connect different feeders.The combustion gas for flowing through the first air inlet 13 enters in combustion chamber 11, Ignition is carried out on burner 20；The combustion gas for flowing through the second air inlet 14 enters in combustion chamber 11, and at burner 20 Under the drive of the flame of generation, burning is ignited on matrix 30, meanwhile, CO is catalyzed reaction and generates CO2, and nitrogen by catalyst 32 Oxide generates nitrogen, carbon dioxide and water in the case where methane is as reducing agent.

In the present invention, due to having opened up the second air inlet 14 in the position of neighbouring catalyst converter, combustion gas is supplemented, then when from the One air inlet enter combustion gas with from air inlet enter air burn at burner 20 generation flue gas rise to catalyst converter Afterwards, flue gas with from the second air inlet 14 be supplemented in come combustion gas burn, the carbon monoxide in flue gas by catalytic action with Oxygen, which combines, in air generates carbon dioxide, to reduce the content of carbon monoxide in flue gas.And the nitrogen oxides in flue gas is then Under combustion gas, the reduction of namely for methane, nitrogen, carbon dioxide and water are ultimately generated with methane reaction, to greatly reduce flue gas The discharge of middle carbon monoxide and nitrogen oxides.Meanwhile the reducing agent methane source in the present invention does not need additional in feeder It is supplemented, is had the effect of simple and reliable for structure from other positions.

In the present embodiment, admission line, and the first air inlet 13 are equipped at the first air inlet 13 and the second air inlet 14 After being commonly connected to same root total pipeline with the admission line at the second air inlet 14, then pass through the total pipeline and gas supply dress Set connection.Certainly, two admission lines can also be connected to feeder respectively.Specifically, being equipped at second air inlet 14 Air inlet pipe, the air inlet pipe are equipped with switch valve 50, and the switch valve 50 is electrically connected with the controller 90 of the gas heater, The controller 90 after the ignition of burner 20 again control switch valve 50 open, so ensure that from second into The combustion gas that port 14 enters can burn by burner 20, to avoid the waste of combustion gas.Specifically, the controller 90 can the unlatching of control switch valve 50 again after detecting 20 ignition to preset duration of burner.Or it is arranged on matrix 30 Temperature sensor, temperature sensor are electrically connected with controller 90, when temperature sensor detects that the temperature of matrix 30 reaches default Catalysis initiation temperature after, controller 90 again open by control switch valve 50, and the catalytic effect to ensure catalyst 32 is best.Or In the embodiment having smoke sensor device can also be arranged, to detect containing for the nitrogen oxides in smog in person at smoke outlet Amount, when the content of nitrogen oxides reaches a higher value (usually preset value), then controller control switch valve 50 is opened, To supplement combustion gas, nitrogen oxides is restored as reducing agent.

In the present embodiment, described matrix 30 is equipped with multiple burner ports 31 through its upper and lower surface, each combustion The hole wall of hole burning 31 is equipped with catalyst 32.In the present embodiment, multiple burner ports 31 are perfectly even arranged on matrix 30, Such as can arrange in matrix so that combustion case is consistent everywhere for matrix 30, be more advantageous to the harmful substance in flue gas into Row catalysis.The hole wall of the burner port 31 is preferably arranged in the catalyst 32 by the way of coating.When air and flue gas When mixed gas is risen in the burner port 31, mixed gas is burnt under the catalytic action of catalyst 32.This implementation In example, in such a way that burner port 31 is set on matrix 30, advantageously ensure that flue gas smooth can be discharged, and be also beneficial to set More catalyst 32 are set, the contact area for increasing flue gas and catalyst 32 realizes better catalytic effect.In the present embodiment, combustion Hole burning can be circular hole or square hole either trapezoidal hole etc..

The hole wall of the burner port 31 is equipped with carrier 33, and the catalyst 32 is set on the carrier 33, the carrier 33 In accordion.In the embodiment, since the carrier 33 is arranged in accordion, it is capable of increasing the surface area of carrier 33, so that carrying 33 surface of body can be attached to more catalyst 32, to improve catalytic performance.The carrier 33 can by heat-resisting ceramic material or Heat-resisting metal material is made, such as aluminum oxide.Catalyst 32 can be for containing Pt, Pb, Ce, La, Ba, Sr, Zr, Cu or Mn Catalyst, or two or more any mixture in them.Catalyst 32 usually has fixed urge Change initiation temperature, i.e., after the temperature of matrix 30 itself reaches catalysis initiation temperature, is attached to the temperature of the catalyst on matrix Also be up to or close to catalysis initiation temperature, flow through matrix combustion gas will catalyst 32 effect under with the oxygen in air into Row flameless combustion is to discharge heat, and air and the mixed gas of combustion gas are able to carry out more sufficiently faster burning as a result, thus Energy utilization rate is improved, and reduces the discharge of harmful substance.

In the present embodiment, the outer peripheral edge of the catalyst converter and the inner wall of the combustion chamber 11 are sealed against, and will be burnt Room 11 is divided into two cavitys up and down, and is connected between upper and lower two cavitys by burner port 31, and so all flue gases can It is enough to be catalyzed in burner port 31, avoid flue gas from the gap between 11 inner wall of the catalyst converter and the combustion chamber and without Catalysis is just discharged, and reduces the discharge of harmful substance.Certainly, catalyst converter can also be arranged with the inner wall interval of combustion chamber 11.This reality It applies in example, the inner wall of the outer peripheral edge and combustion chamber 11 of catalyst converter seals against, and refers to outer peripheral surface and the combustion chamber of catalyst converter 11 inner wall seals against, i.e. seals against between the form and combustion chamber 11 of the settable sealing ring of the circumferential surface of matrix 30.Or Person states the inner wall of combustion chamber 11 and is circumferentially equipped with overlap joint protrusion, and the catalyst converter lap hermetically is in the overlap joint protrusion Top surface so facilitates the installation of catalyst converter, as long as catalyst converter is placed on overlap joint protrusion.To prevent catalyst converter from shaking It is dynamic, catalyst converter can be also fixed on overlap joint protrusion by screw.The above two formula that seals against can both be separately provided, can also be same When be arranged, to realize better effect.

To reduce scattering and disappearing for 30 heat of described matrix, in one embodiment, the outer peripheral surface of described matrix 30 is coated with heat preservation Layer 35.In the embodiment, the insulating layer 35 is preferably heat-preservation cotton.By the way that insulating layer 35 is arranged, heat can be reduced towards surrounding It scatters and disappears, so that heat is concentrated inwardly to heat the catalyst 32, so that heat utilization rate is improved, preferably to catalyst 32 It is preheated.

Further, the gas heater further includes the outer peripheral surface enclosed set on described matrix 30 and consolidates with described matrix 30 Fixed peripheral frame 34, the peripheral frame 34 and the inner wall of the combustion chamber 11 seal against, and the insulating layer 35 is located at the peripheral frame Between 34 and described matrix 30.In the present embodiment, by the way that peripheral frame 34 is arranged, insulating layer 35 is pressed from both sides jointly by peripheral frame 34 and matrix 30 Hold it is fixed, to facilitate the setting of insulating layer 35.Meanwhile peripheral frame 34 is fixed with the inner wall of combustion chamber 11, is such as spirally connected Or clamping etc..

The upper and lower ends of the peripheral frame 34 are equipped with the limit flange 341 extended inwardly, and the two limit flange 341 are common Clamp described matrix 30.In the embodiment, described matrix 30 is between the two limit flange 341, and by two limits Flange 341 clamps jointly.The peripheral frame 34 is connect with the inner wall of the combustion chamber 11.

In the present embodiment, the catalyst converter may be provided at the top of heat exchanger 80, may be alternatively provided at the lower section of heat exchanger 80.It is excellent Selection of land, catalyst converter are located at the top of the heat exchanger 80, so that catalyst converter is catalyzed to flue gas, rather than to mixed Gas is closed to be catalyzed.The catalyst converter can be fixed by screw and the inner wall of combustion chamber 11, alternatively, the catalyst converter with The inner wall of combustion chamber 11 is connected and fixed by buckling card slot.

In the present embodiment, water pipe 70 includes inlet segment, water exit end, and is respectively communicated with the heat exchange of inlet segment and water outlet Section.Heat exchanging segment includes interconnected the first heat exchanging segment and the second heat exchanging segment, and the first heat exchanging segment is connected to inlet segment, the second heat exchange The connection of Duan Zeyu water exit end.First heat exchanging segment is preferably in coil-like setting between heat exchanger 80 and matrix 30, and along combustion The circumferential winding of 11 inner wall of room is burnt, is exchanged heat in advance with the flame with 30 top of matrix.Second heat exchanging segment is then interspersed in heat exchanger In 80, exchanged heat by being contacted with heat exchanger 80.In the present embodiment, cold water by inlet segment enter the first heat exchanging segment into Row exchanges heat for the first time, then enters second of the progress of the second heat exchanging segment from the first heat exchanging segment and exchange heat, and finally flows out from water exit end, so Cold water is heated twice, improves the utilization rate of heat and the heating efficiency to water.Certainly, in other embodiments, Heat exchanging segment can also only include the second heat exchanging segment.

Further, venturi gas mixed nub structure also can be used in the fuel gas mixer of gas heater, including two input ports (are divided Wei air inlet 12 and air inlet) an and delivery outlet (i.e. mixed gas outlet), two input ports respectively with the air outlet of blower 60, combustion The gas outlet of gas air inlet pipeline is connected to, and delivery outlet is connected to combustion chamber 11.

In the present embodiment, venturi gas mixed nub structure can be from the upper pipeline for first shrinking then be gradually expanded downward, in pipe Road exit offers adsorbent chamber；After being compressed by the air-flow of venturi gas mixed nub structure from the coarse to fine, flow velocity becomes larger, and generates text Effect in mound can generate low pressure near swiftly flowing fluid, to generate suction-operated, ambient gas is caused to pass through suction Attached chamber is inhaled into pipeline.It, can be using air that blower 60 pumps as being compressed by the Venturi effect of venturi gas mixed nub structure Gas realize air with combustion gas using combustion gas as the gas being adsorbed and adequately mix, so that it is more abundant to make to burn.

Burner 20 in the present embodiment concretely ordinary burner, certainly, burner 20 can also be catalytic burner, Its specific structure is similar with the structure of catalyst converter, including a matrix and the catalyst being arranged on matrix.Catalytic burner Matrix can be heating member, and be electrically connected to a power source, be embedded with the intrinsic silicon of heatable catalyst or catalytic burner plus Warmware, and the matrix of catalytic burner is heat-conducting piece.

The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly It is included in other related technical areas in scope of patent protection of the invention.

Claims

1. a kind of gas heater characterized by comprising

Shell, have a combustion chamber, and with the air inlet of the combustion chamber, the first air inlet and the second air inlet, it is described First air inlet is arranged close to the outer casing bottom, and second air inlet is arranged close to the cover top portion, and described first Air inlet and second air inlet are connected to feeder；

Burner is set in the combustion chamber, and between first air inlet and second air inlet；And

2. gas heater as described in claim 1, which is characterized in that air inlet pipe is equipped at second air inlet, it is described Air inlet pipe is equipped with switch valve, and the switch valve is electrically connected with the controller of the gas heater.

3. gas heater as described in claim 1, which is characterized in that described matrix is equipped with multiple through its upper and lower surface Burner port, the hole wall of each burner port is equipped with the catalyst.

4. gas heater as claimed in claim 3, which is characterized in that the outer peripheral edge of the catalyst converter and the combustion chamber Inner wall seals against.

5. gas heater as claimed in claim 4, which is characterized in that the catalyst converter further includes enclosing set on described matrix Outer peripheral surface, and the peripheral frame fixed with described matrix, the peripheral frame and the inner wall of the combustion chamber seal against.

6. gas heater as claimed in claim 5, which is characterized in that the upper and lower ends of the peripheral frame are equipped with to be extended inwardly Limit flange, the two limit flange clamp described matrix jointly.

7. gas heater as claimed in claim 6, which is characterized in that the outer peripheral surface of described matrix is coated with insulating layer, institute Insulating layer is stated between the peripheral frame and described matrix.

8. gas heater as claimed in claim 4, which is characterized in that the inner wall of the combustion chamber and be circumferentially equipped with Protrusion is overlapped, the catalyst converter lap hermetically is in the top surface of the overlap joint protrusion.

9. gas heater as described in claim 1, which is characterized in that the gas heater further includes being set to the burning Heat exchanger above device, the catalyst converter are located at the top of the heat exchanger.

10. gas heater as claimed in any one of claims 1 to 9, which is characterized in that the catalyst be containing Pt, Pb, The catalyst of Ce, La, Ba, Sr, Zr, Cu or Mn.