Utility model content
Main purpose of the present utility model is to propose a kind of gas heater, it is intended to solves gas heater in the prior art
Energy utilization rate it is low and it is easy generation harmful substance technical problem.
To achieve the above object, the utility model proposes a kind of gas heater, including blower fan, gas inlet pipeline with
And it is serially connected in the intake valve on the gas inlet pipeline;The gas heater also includes:
Jacket heat-exchanger, upper combustion chamber is formed in setting and enclosing towards lower open mouth;
Catalytic burner, installed in the upper combustion chamber;
Drain pan, set in open upward, lower combustion chamber is formed at the bottom of the bottom case inner cavity;The drain pan is provided with and it
The exhaust opening of inner chamber connection;The open sealing of the open and jacket heat-exchanger of the drain pan is docked and forms Heat Room;
Preheated burning device, installed in the lower combustion chamber;
Installed in the main heat exchanger of the Heat Room, connected with the jacket heat-exchanger;
Temperature sensor, for detecting the temperature of the catalytic burner;
Controller, electrically connected with the temperature sensor;The controller is to when the gas heater starts, control
The preheated burning device burning is made to heat the catalytic burner, and reaches catalysis ignition in the temperature of the catalytic burner
The preheated burning device is controlled to extinguish when more than temperature.
Preferably, the jacket heat-exchanger includes mutually nested from the inside to the outside inner bag and shell, and the inner bag encloses shape
Into upper combustion chamber, the inner bag includes the inner roof wall of spherical crown shape, and from the tubular that the edge of the inner roof wall extends downwardly
Side wall, down, the horizontal extension of the catalytic burner is simultaneously relative with the concave surface of the inner roof wall for the concave surface of the inner roof wall
Set.
Preferably, the gas heater also includes the heat collecting cylinder set installed in the Heat Room and in open at both ends,
The main heat exchanger is sheathed on the periphery of the heat collecting cylinder, and the shape of cross section of the heat collecting cylinder is circular, and the heat collecting cylinder
One end connects with the upper combustion chamber, and the other end connects with the lower combustion chamber.
Preferably, the inner bag also includes the annular flange outwards turned down from the root edge of the madial wall, the shell bag
Include the outer roof of spherical crown shape, and the tubular lateral wall extended downwardly from the edge of the outer roof, the concave surface of the outer roof
Down, the root edge of the lateral wall is tightly connected with the flange.
Preferably, the water inlet of the jacket heat-exchanger is opened in the top of shell.
Preferably, the drain pan includes upper accommodating cylinder and the upward open lower accommodating cylinder set, the upper accommodating cylinder it is upper
The open sealing docking of the jacket heat-exchanger is held, the bottom wall of the upper accommodating cylinder offers connector between two parties, described lower accommodating
The open and connector sealing of cylinder is docked, and the lower combustion chamber is formed in the lower accommodating cylinder.
Preferably, the open sealing with the connector in the heat collecting cylinder lower end is docked, the side wall of the heat collecting cylinder with it is described
The side wall for housing cylinder down is wholely set.
Preferably, the upper end of the heat collecting cylinder supports the catalytic burner, and the side wall of the heat collecting cylinder upper end is circumferentially
Provided with multiple air-vents.
Preferably, the main heat exchanger is bonded the internal face of the upper accommodating cylinder and set, the main heat exchanger with it is described on
The junction of accommodating cylinder is provided with water inlet interface, the water inlet interface extend to the outside of the upper accommodating cylinder and with the main heat exchange
Device connects;
The jacket heat-exchanger is provided with water outlet mouthpiece at the outside wall surface of one end of the drain pan, the water outlet mouthpiece with
The inner chamber connection of jacket heat-exchanger;The gas heater also includes the connecting tube for connecting the water outlet mouthpiece and water inlet interface.
Preferably, the exhaust opening is opened between the bottom wall of the main heat exchanger and the upper accommodating cylinder;
Preferably, the controller is additionally operable to when the temperature of the catalytic burner reaches more than catalysis initiation temperature,
Control the blower fan to increase the air inflow of air and the control intake valve in the unit interval and increase combustion gas in the unit interval
Air inflow is so that the preheated burning device extinguishes.
The utility model gas heater above preheated burning device by setting catalytic burner, first with preheated burning
The flaming combustion carried out on device, when the temperature of catalytic burner reaches more than default catalysis initiation temperature, air and combustion gas
Catalysis burning of controlling oneself can occur on catalytic burner for mixed gas, because the catalytic action of catalyst, combustion gas is compared with low temperature
It can be burnt under degree on catalytic burner, and combustion gas is almost discharged close to completely burned without CO.Because catalysis is fired
Flue-gas temperature after burning is lower than the temperature of flaming combustion, and the low emission of nitrogen oxides can be achieved.Can in the thermal current of upper combustion chamber
Tentatively to be exchanged heat with jacket heat-exchanger first, flowed downward then along the annular space between Heat Room and heat collecting cylinder and with putting
Main heat exchanger heat exchange below jacket heat-exchanger, is most discharged through exhaust opening, in this way, having been carried out twice to water in heat transfer process afterwards
Heating, effectively increases capacity usage ratio and the efficiency of heating surface.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belong to the scope of the utility model protection.
If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction be only used for explain it is relative between each part under a certain particular pose (as shown in drawings)
Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes therewith.
If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment
Two " etc. description is only used for describing purpose, and it is not intended that instruction or implying its relative importance or implicit indicating meaning
The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one
Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill
Personnel can be implemented as basis, and this technical side is will be understood that when the combination appearance of technical scheme is conflicting or can not realize
The combination of case is not present, also not within the protection domain of the requires of the utility model.
The utility model proposes a kind of gas heater.
In the utility model embodiment, as shown in Figures 1 to 4, the gas heater includes blower fan 1, gas inlet pipe
Road (not shown) and the intake valve (not shown) being serially connected on gas inlet pipeline;Gas heater also includes:
Jacket heat-exchanger 3, upper combustion chamber 30 is formed in setting and enclosing towards lower open mouth;
Catalytic burner 4, installed in upper combustion chamber 30;
Drain pan 5, set in open upward, lower combustion chamber 51 is formed at the bottom of the inner chamber of drain pan 5;Drain pan 5 be provided with it
The exhaust opening 52 of chamber connection;The opening of drain pan 5 is docked with the open sealing of jacket heat-exchanger 3 and forms Heat Room 350;
Preheated burning device 6, installed in lower combustion chamber 51;
Installed in the main heat exchanger 8 of Heat Room 350, connected with jacket heat-exchanger 3;
Temperature sensor 9, for detecting the temperature of catalytic burner 4;
Controller 10, electrically connected with temperature sensor 9;Controller 10 is to when gas heater starts, control preheats
Burner 6 burns with heatable catalytic burner 4, and is controlled when the temperature of catalytic burner 4 reaches more than catalysis initiation temperature
Preheated burning device 6 extinguishes.
In the present embodiment, blower fan 1, gas heater and intake valve can use existing, will not be described in detail herein.Chuck
Heat exchanger 3 be it is a kind of using mezzanine space come the heat exchanger for water heat exchange disposed within.Water inlet is set on jacket heat-exchanger 3
34 connect with extraneous circulation line to facilitate and continually introduce cold water.Both can be direct between jacket heat-exchanger 3 and main heat exchanger 8
Connection can also pass through pipeline indirect communication.
Catalytic burner 4 generally comprises the catalyst of catalyst carrier and setting on a catalyst support, and catalyst leads to
Often with there is fixed catalysis initiation temperature, i.e., after catalytic burner 4 temperature of itself reaches catalysis initiation temperature, flow through its
Combustion gas will carry out flameless combustion to discharge heat under catalyst action with the oxygen in air.In order to increase the attached of catalyst
Area, and then increases catalytic action space, catalyst carrier typically uses heat-resisting alveolate texture.
Drain pan 5 is that preheated burning device 6 and main heat exchanger 8 provide accommodation space, and can form the branch to heat collecting cylinder 7
Support.It is understood that the gas outlet of the air outlet of blower fan 1, gas inlet pipeline connects with lower combustion chamber 51.
Preheated burning device 6 can use existing gas burner, and for example, gas heater also includes igniter
13, igniter 13 is the combustion gas of the injection from preheated burning device 6 to be lighted.I.e. under the control of controller 10, igniter 13
Relevant action be present with intake valve.
The utility model gas heater is fired by setting catalytic burner 4 above preheated burning device 6 first with preheating
The flaming combustion carried out in burner 6.When the temperature of catalytic burner 4 reach it is default catalysis initiation temperature more than when, air with
Combustion gas mixing gas can occur on catalytic burner 4 control oneself catalysis burning because the catalytic action of catalyst, combustion gas compared with
It can be burnt under low temperature on catalytic burner 4, and combustion gas is almost discharged close to completely burned without CO.Due to
Flue-gas temperature after catalysis burning is lower than the temperature of flaming combustion, and the low emission of nitrogen oxides can be achieved.
Can tentatively be exchanged heat with jacket heat-exchanger 3 first in the thermal current of upper combustion chamber 30, then along Heat Room 350 with
Annular space between heat collecting cylinder 7 flows downward and the main heat exchanger 8 with being placed in the lower section of jacket heat-exchanger 3 exchanges heat, most afterwards through row
Mouth 52 is discharged;At the same time, water to be heated, flowed into first from the water inlet 34 of jacket heat-exchanger 3, flowing through gum cover heat exchange
Main heat exchanger 8 is entered back into after device 3, is most flowed out afterwards through the delivery port 82 on main heat exchanger 8.In this way, water is carried out in heat transfer process
Heat twice, effectively increase capacity usage ratio and the efficiency of heating surface.
Further, jacket heat-exchanger 3 includes mutually nested from the inside to the outside inner bag 31 and shell 32, and inner bag 31 encloses shape
Into upper combustion chamber 30, inner bag 31 includes the inner roof wall 311 of spherical crown shape, and the tubular extended downwardly from the edge of inner roof wall 311
Madial wall 312, down, the horizontal extension of catalytic burner 4 is simultaneously relative with the concave surface of inner roof wall 311 for the concave surface of inner roof wall 311
Set.
In the present embodiment, the concave surface of inner roof wall 311 can more be relaxed with convection current to the thermal current of inner roof wall 311
Commutation is oriented to so that flowing through the air-flow of catalytic burner 4 more can sequentially flow between Heat Room 350 and heat collecting cylinder 7
Annular space;Meanwhile before catalytic burner 4 not up to catalytic temperature, under the reflex of inner roof wall 311, heat radiation can
Preferably to concentrate catalytic burner 4, and then accelerate firing rate.Catalytic burner 4 is then advantageous to more in being horizontally disposed with
Ground, absorb the heat for flowing through thermal current.
Further, inner bag 31 also includes the annular flange 313 outwards turned down from the root edge of madial wall 312, and shell 32 wraps
The outer roof 321 of spherical crown shape, and the tubular lateral wall 322 extended downwardly from the edge of outer roof 321 are included, outer roof 321
Down, root edge and the flange 313 of lateral wall 322 are tightly connected for concave surface.
In the present embodiment, by setting the shell 32 of flange 313 to be preferably socketed with inner bag 31.Preferably, flange
The outer peripheral face of 313 protrusion lateral walls 322, the open edge of drain pan 5 are outwards turned down formed with scrap (bridge) 53, scrap (bridge) 53 and flange
313 phases overlap and seal cooperation.Effectively, the cross section of madial wall 312 and lateral wall 322 is circle, madial wall 312 and outer
The uniform heat exchanging interlayer chamber 33 of radial thickness is formed between side wall 322.
Further, the water inlet 34 of jacket heat-exchanger 3 is opened in the top of shell 32.Due to jacket heat-exchanger 3 with
The heat that its open relative top wall surface absorbs catalysis heat exchanger is most, the setting of the present embodiment water inlet 34, it is ensured that just
The water for beginning to introduce exchanges heat with the temperature highest position of jacket heat-exchanger 3 first.
Further, gas heater also includes the heat collecting cylinder 7 set installed in Heat Room 350 and in open at both ends, main
Heat exchanger 8 is sheathed on the periphery of heat collecting cylinder 7, and the shape of cross section of heat collecting cylinder 7 is circular, and the one end of heat collecting cylinder 7 and upper combustion chamber
30 connect, and the other end connects with lower combustion chamber 51.
In the present embodiment, heat collecting cylinder 7 is simply separated to exchange hot cell 350, and with exhaust opening 52 coordinate under, with
Heat and thermal current are flowed along preheated burning device 6, catalytic burner 4, jacket heat-exchanger 3 and 8 this path of main heat exchanger.
In heat collecting cylinder 7 under effect, preheated burner 6 heat after air flow collection in act on catalytic burner 4 and be advantageous to quickening and urge
Change the firing rate of burner 4.
Further, drain pan 5 includes upper accommodating cylinder 54 and the upward open lower accommodating cylinder 55 set, upper accommodating cylinder 54 it is upper
The open sealing docking of jacket heat-exchanger 3 is held, the bottom wall of upper accommodating cylinder 54 offers connector 541 between two parties, lower accommodating cylinder 55
Open to be docked with the sealing of connector 541, lower combustion chamber 51 is formed in lower accommodating cylinder 55.
In the present embodiment, because warmup heater mainly plays a part of heatable catalytic burner 4, therefore, with preheating
It is in smaller than upper accommodating cylinder 54 that the volume of lower combustion chamber 51 corresponding to heater and horizontal cross-sectional area, which can be set,.From
For functionally, upper accommodating cylinder 54 also needs to be connected with jacket heat-exchanger 3, and forms the space of accommodating main heat exchanger 8, because
This, it is more reasonable to be arranged to up big and down small structure by drain pan 5.
Further, the lower end of heat collecting cylinder 7 is open docks with the sealing of connector 541, the side wall of heat collecting cylinder 7 and lower accommodating cylinder 55
Side wall be wholely set.
In the present embodiment, each shell-like structure generally preferably uses steelwork, such as plate bending welding procedure, and collects
The side wall of hot cylinder 7 and lower accommodating cylinder 55 is wholely set, then is advantageous to both and uses the tubing of same specification, and then can reduce spelling
Technique is connect, reduces cost.
Further, the upper end support catalytic burner 4 of heat collecting cylinder 7, the side wall of the upper end of heat collecting cylinder 7 is circumferentially arranged with multiple
Air-vent 71.
In the present embodiment, by setting air-vent 71, be advantageous to the combustion gas after being ignited or hot gas flows to Heat Room 350
Annular space backflow between heat collecting cylinder 7.
Further, the internal face that cylinder 54 is housed in the fitting of main heat exchanger 8 is set, main heat exchanger 8 and upper accommodating cylinder 54
Junction is provided with water inlet interface 81, and water inlet interface 81 extends to the outside of accommodating cylinder 54 and connected with main heat exchanger 8;
Jacket heat-exchanger 3 is provided with water outlet mouthpiece 35 at the outside wall surface of one end of drain pan 5, and water outlet mouthpiece 35 changes with chuck
The inner chamber connection of hot device 3;Gas heater also includes the connecting tube 11 of connection water outlet mouthpiece 35 and water inlet interface 81.
In the present embodiment, connecting tube 11 is placed on the main body section of gas heater, is more beneficial for gas heater
Assembling Production.Water outlet mouthpiece 35 is positioned adjacent to the position of drain pan 5, the top of jacket heat-exchanger 3 is arranged on reference to water inlet 34
Embodiment, the average path that water in jacket heat-exchanger 3 flows can be so lengthened, so as to improve heat exchange efficiency.
Further, exhaust opening 52 is opened between the bottom wall of main heat exchanger 8 and upper accommodating cylinder 54;In this way, it can cause
Thermal current or radiation could must discharge after being exchanged heat with main heat exchanger 8 through exhaust opening 52, and then can improve gas heater
Overall heat utilization efficiency.Specifically, gas heater also includes the smoke exhaust pipe for being connected and upwardly extending with exhaust opening 52, in this way,
User can be facilitated to connect other smoke discharging structures.
Further, controller 10 is additionally operable to when the temperature of catalytic burner 4 reaches more than catalysis initiation temperature, control
Blower fan 1 increase the unit interval in air air inflow and control intake valve increase the unit interval in combustion gas air inflow so that
Preheated burning device 6 extinguishes.
In the present embodiment, by controlling the intake velocity of air and combustion gas to reach the de- live wire speed of preheated burning device 6,
The flame on preheated burning device 6 can be made quickly to extinguish, and then switch to the catalysis burning by catalytic burner 4.
Preferred embodiment of the present utility model is the foregoing is only, not thereby limits the scope of the claims of the present utility model,
Every equivalent structure under utility model of the present utility model design, made using the utility model specification and accompanying drawing content
Conversion, or directly/be used in other related technical areas indirectly and be included in scope of patent protection of the present utility model.