CN205783717U - Gas heater - Google Patents

Abstract

The utility model discloses a kind of gas heater, including: housing, define receiving chamber in housing, housing has air vent, hot water outlet and cooling water inlet；Premixing cavity shell, premixing cavity shell is located at receiving intracavity, defines hybrid chamber in premixing cavity shell；Burner, burner is located at the lower section of hybrid chamber, and burner turns on hybrid chamber, is provided with catalytic burner and is smokelessly catalyzed the catalyst of burning in burner；Heat exchanger, heat exchanger is located at the lower section of burner and the heat produced with absorption burner burning that is connected with burner, and heat exchanger has water inlet and outlet, and water inlet turns on cooling water inlet, and outlet turns on hot water outlet；Pre-add hot plate, pre-add hot plate is connected to preheat burner with burner；Controller, controller be connected with pre-add hot plate with control pre-add hot plate heating-up temperature.According to gas heater of the present utility model, can use safe and environment-friendly from Sources controlling carbon monoxide and the generation of nitrogen oxides.

Description

Gas heater

Technical field

This utility model relates to technical field of water heaters, more particularly, to a kind of gas heater.

Background technology

The primary combustion mode that the burner of the gas heater in correlation technique uses is flaming combustion, not only can make energy profit Reduce by rate, and combustion process can be discharged substantial amounts of pollutant, be the one of the main reasons causing haze weather to take place frequently. Therefore, traditional inefficient combustion mode is replaced to be considered as optimal combustion system with combustion system efficient, cleaning.

Utility model content

One of technical problem that this utility model is intended to solve in correlation technique the most to a certain extent.To this end, this practicality is new Type proposes a kind of gas heater, the simple in construction of this gas heater, and each parts connect reliable, are convenient to mount and dismount, and fuel exists Flameless catalytic combustion can be carried out in burner, can avoid producing harmful gas, use safe and environment-friendly.

According to gas heater of the present utility model, including: housing, define receiving chamber in described housing, described housing has There are air vent, hot water outlet and cooling water inlet；Premixing cavity shell, described premixing cavity shell is located at described receiving intracavity, Hybrid chamber is defined in described premixing cavity shell；Burner, described burner is located at the lower section of described hybrid chamber, described combustion Burner turns on described hybrid chamber, is provided with the described burner of catalysis and is smokelessly catalyzed the catalyst of burning in described burner； Heat exchanger, described heat exchanger is located at the lower section of described burner and is connected with described burner to absorb described burner combustion product Raw heat, described heat exchanger has water inlet and outlet, and described water inlet turns on described cooling water inlet, described water outlet Mouth turns on described hot water outlet；Pre-add hot plate, described pre-add hot plate is connected to carry out described burner with described burner Preheat；Controller, described controller be connected with described pre-add hot plate with control described pre-add hot plate heating-up temperature.

According to gas heater of the present utility model, make fuel generation flameless catalytic combustion by being provided in burner Catalyst, and outside burner, setting preheats dish, makes pre-add hot plate can preheat the catalyst in burner, from And reduce the initiation temperature of fuel, make fuel can fully burn and deepen its degree of oxidation, both can improve fuel Reaction rate, improves the utilization rate of fuel, can avoid again the generation of harmful gas (carbon monoxide and nitrogen oxides), from Sources controlling carbon monoxide and the generation of nitrogen oxides.The simple in construction of this gas heater, each parts connect reliable, mounting or dismounting Convenient, fuel can carry out flameless catalytic combustion in burner, greatly reduce the generation of harmful gas, use safely, Environmental protection.

It addition, according to gas heater of the present utility model, it is also possible to have a following additional technical characteristic:

According to an embodiment of the present utility model, also include blower fan and gas ratio valve, described blower fan and described gas proportion Valve is connected with described controller respectively, and described blower fan is located at the top of described hybrid chamber to carry air, institute to described hybrid chamber State gas ratio valve to be connected with described burner to carry described combustion gas to described hybrid chamber.

According to an embodiment of the present utility model, the pre-heating temperature of described burner is controlled at 300 DEG C by described pre-add hot plate -400℃。

According to an embodiment of the present utility model, described pre-add hot plate uses Electric heating to heat.

According to an embodiment of the present utility model, described catalyst is precious metal material part or non-metallic material.

According to an embodiment of the present utility model, described catalyst is coated on the internal face of described burner.

According to an embodiment of the present utility model, being provided with catalyst carrier in described burner, described catalyst is coated in institute State the surface of catalyst carrier.

According to an embodiment of the present utility model, described catalyst carrier is ceramic honey comb.

According to an embodiment of the present utility model, it is provided with temperature detector in described burner to detect adding of described catalyst Hot temperature.

According to an embodiment of the present utility model, the heating-up temperature of described catalyst is T, if T ＞ 400 DEG C, described control Device controls described blower fan and is respectively started to carry described air and described combustion gas to described hybrid chamber with described gas ratio valve；If T ＞ 700 DEG C, described controller controls described pre-add hot plate and stops heating.

According to an embodiment of the present utility model, in described hybrid chamber, it is provided with spoiler or damping piece, with by described air It is sufficiently mixed with described combustion gas.

According to an embodiment of the present utility model, also include exhaust fume collecting hood, described exhaust fume collecting hood be connected with described heat exchanger and with institute Stating air vent conducting, described exhaust fume collecting hood is for the flue gas collected and discharge produces with described burner combustion.

According to an embodiment of the present utility model, also including buffering water pot, described buffering water pot is located at described receiving intracavity, Described buffering water pot in water (flow) direction between described outlet and described hot water outlet and respectively with described outlet and institute State hot water outlet connection.

According to an embodiment of the present utility model, described heat exchanger includes First Heat Exchanger and the second heat exchanger, described first Heat exchanger is located at the top of described second heat exchanger and between described burner and described second heat exchanger.

Additional aspect of the present utility model and advantage will part be given in the following description, and part will become from the following description Obtain substantially, or recognized by practice of the present utility model.

Accompanying drawing explanation

Fig. 1 is the structural representation of the gas heater according to this utility model embodiment.

Reference:

100: gas heater；

10: housing；11: air inlet；12: air vent；13: accommodate chamber；

20: premixing cavity shell；

30: burner；31: temperature detector；

40: heat exchanger；40a: First Heat Exchanger；40b: the second heat exchanger；41: buffering water pot；

50: pre-add hot plate；

70: blower fan；

80: gas ratio valve；

90: exhaust fume collecting hood；91: condensed water box.

Detailed description of the invention

Of the present utility model embodiment is described below in detail, and the example of described embodiment is shown in the drawings.Below with reference to The embodiment that accompanying drawing describes is exemplary, it is intended to be used for explaining this utility model, and it is not intended that to of the present utility model Limit.

The primary combustion mode that the burner of gas heater uses is flaming combustion: combustion gas and air are the most pre-in burner First mix, but respectively they are sent in combustor, and burn on combustor inner edge mixing limit, this kind of combustion system The flame that burning produces is longer, and has the profile of distinctness, belongs to diffusion combustion.Flaming combustion is higher due to activation energy, burning Speed is slow, and incomplete combustion can cause the thermal efficiency to decline.Additionally, the gas radiation amount of flaming combustion flame is less, with right Stream heat exchange is main heat transfer mode, can reduce energy utilization rate.Furthermore, due to different parts and the difference of air contact of burning Different, the completeness of burning and temperature can be caused the most different.Specifically, in high-temperature region, owing to temperature is high, cause in air Oxygen and nitrogen reaction generate nitrogen oxides pollution thing；Low-temperature space, due to incomplete combustion, can produce carbon monoxide, carbon The harmful substance such as hydrogen compound and tar.

To this end, the utility model proposes a kind of gas heater 100, the simple in construction of this gas heater 100, each parts Connecting reliable, be convenient to mount and dismount, fuel can carry out flameless catalytic combustion in burner 30, can avoid producing harmful gas, Use safe and environment-friendly.

1 specifically describe the gas heater 100 according to this utility model embodiment below in conjunction with the accompanying drawings.

Gas heater 100 according to this utility model embodiment include housing 10, premixing cavity shell 20, burner 30, Heat exchanger 40, pre-add hot plate 50 and controller (not shown).Specifically, receiving chamber 13, shell are defined in housing 10 Body 10 has air vent 12, hot water outlet (not shown) and cooling water inlet (not shown), and premixing cavity shell 20 is located at Accommodating in chamber 13, define hybrid chamber in premixing cavity shell 20, burner 30 is located at the lower section of hybrid chamber, burner 30 turn on hybrid chamber, be provided with catalytic burner 30 and be smokelessly catalyzed the catalyst of burning, heat exchanger 40 in burner 30 Being located at the lower section of burner 30 and the heat produced with absorption burner 30 burning that is connected with burner 30, heat exchanger 40 has Having water inlet and outlet, water inlet to turn on cooling water inlet, outlet turns on hot water outlet, pre-add hot plate 50 and burning Device 30 is connected to preheat burner 30, and controller is connected with pre-add hot plate 50 to control adding of pre-add hot plate 50 Hot temperature.

In other words, this gas heater 100 mainly by housing 10, premixing cavity shell 20, burner 30, heat exchanger 40, Pre-add hot plate 50 and controller composition.Wherein, housing 10 vertically (above-below direction as shown in Figure 1) extends, Defining receiving chamber in housing 10, housing 10 has the air vent 12 of the air inlet 11 of fuel, waste gas, premixing cavity shell Defining the hybrid chamber for accommodating air and combustion gas in 20, the combustion gas that premixing cavity shell 20 has with hybrid chamber conducting is entered Mouth, air intlet and mixed gas outlet, burner 30 connects with premixing cavity shell 20 so that the fuel in hybrid chamber can To burn in entering burner 30.

Specifically, being provided with catalyst in burner 30, this catalyst can reduce the initiation temperature of fuel, and deepens its oxidation Degree, makes Organic substance that flameless combustion to occur under the initiation temperature told somebody what one's real intentions are, and oxidized is decomposed into the end product of burning Carbon dioxide and water, meanwhile, discharge substantial amounts of heat, and the reactant molecule of fuel can be enriched in the surface of catalyst, Improving reaction rate, improve the utilization rate of fuel, this catalyst can effectively suppress the generation of nitrogen oxides, colleague's catalysis combustion Burn relatively more complete, reduce the content of carbon monoxide in flue gas, thus effectively reduce the discharge of harmful gas.Pre-add hot plate 50 with Burner 30 is connected so that burner 30 to be preheated to uniform temperature, and pre-add hot plate 50 can be in burner 30 Catalyst carries out being preheated to uniform temperature, so that the mixed gas of air and combustion gas can be sent out in entering burner 30 Raw flameless combustion, reduces the harmful gas that fuel produces when ignition.

Heat exchanger 40 is connected with burner 30, and when burner 30 works, the water in heat exchanger 40 can be with absorption burner 30 heats produced, are consequently formed hot water and use for user.Such as, burner 30 produce amount of heat can with change The surface of hot device 40 directly carries out heat exchange, thus reaches the purpose of the water heating in heat exchanger 40, specifically, heat exchange Device 40 is provided with fin, the fin on high-temperature flue gas impingement heat transfer device 40, carries out heat exchange.Certainly, this utility model does not limit In this, also can have the water pipe arranging multiple circulation water in heat exchanger 40, the outside of heat exchanger 40 is provided with and cross current Water inlet pipe and outlet pipe, system can be by water inlet pipe (not shown) to the water pipe injection cold water of heat exchanger 40, and fuel is in combustion Carry out burning in burner 30 and can produce high-temperature flue gas, in high-temperature flue gas enters water heater and carry out heat exchange with the water in water pipe, Thus reaching the purpose of the water heating in heat exchanger 40, the hot water in last heat exchanger 40 is arranged from outlet pipe (not shown) Go out gas heater 100 outer for user's use.

Specifically, as it is shown in figure 1, in the present embodiment, premixing cavity shell 20, burner 30, heat exchanger 40, pre- Add hot plate 50, blower fan 70, gas ratio valve 80 are each provided in the receiving chamber 13 of housing 10, wherein, and burner 30 upper Side and be respectively arranged below with blower fan 70 and heat exchanger 40, be provided with premixing cavity shell 20 between blower fan 70 and burner 30, Pre-add hot plate 50 is connected to preheat the catalyst in burner 30 with burner 30, when gas heater 100 work When making, air and combustion gas respectively enter hybrid chamber mix homogeneously, and then fuel from top to bottom flows, enters and be positioned under hybrid chamber Burn in the burner 30 of side, in the high-temperature flue gas that burner 30 produces from top to bottom enters heat exchanger 40 and in water pipe Cold water carry out heat exchange, thus realize adding the purpose of hot water, in the process, the operation of blower fan 70 can be to preheat dish 50 pairs of burner 30 preheatings provide direction to support.

Thus, according to the gas heater 100 of this utility model embodiment, by being provided for making fuel in burner 30 There is the catalyst of flameless catalytic combustion, and preheat dish 50 outer setting of burner 30, make the pre-add hot plate 50 can be to combustion Catalyst in burner 30 preheats, thus reduces the initiation temperature of fuel, makes fuel can fully burn and deepen Its degree of oxidation, both can improve the reaction rate of fuel, improves the utilization rate of fuel, can avoid again harmful gas ( Carbonoxide and nitrogen oxides) generation, from Sources controlling carbon monoxide and the generation of nitrogen oxides.This gas heater 100 Simple in construction, each parts connect reliable, are convenient to mount and dismount, and fuel can carry out flameless catalytic combustion in burner 30, greatly The earth reduces the generation of harmful gas, uses safe and environment-friendly.

Wherein, according to an embodiment of the present utility model, gas heater 100 also includes blower fan 70 and gas ratio valve 80, blower fan 70 is connected with controller respectively with gas ratio valve 80, and blower fan 70 is located at the top of hybrid chamber with defeated to hybrid chamber Sending air, thus the flowing for air provides power, gas ratio valve 80 is connected with burner 30 with to hybrid chamber conveying combustion Gas, it is ensured that the fuel supply of gas heater 100, thus ensure the normal work of gas heater 100.

When gas heater 100 works, blower fan 70 and gas ratio valve 80 carry air and combustion gas respectively in hybrid chamber, After air and combustion gas carry out being sufficiently mixed uniformly in hybrid chamber, entrance is positioned at the burner 30 below hybrid chamber and fires Burning, owing to the catalyst in burner 30 is preheated by pre-add hot plate 50, therefore, fuel one enters burner Just can carry out flameless catalytic combustion in 30, in catalyticing combustion process, the effect of catalyst is the initiation temperature reducing fuel, And deepen its degree of oxidation, make Organic substance that flameless combustion to occur under the conditions of relatively low initiation temperature, and oxidation Decomposition is burning End product carbon dioxide and water, discharge amount of heat, makes reactant molecule be enriched in catalyst surface simultaneously, to improve Reaction rate, raising fuel availability, be greatly reduced the harmful gas that fuel combustion produces.

Compared with the gas heater using flaming combustion in correlation technique, the simple in construction of this gas heater 100, each portion Part connects reliable, rationally distributed, is convenient to mount and dismount, and by arranging catalyst in burner 30, and arrange can be to burner 30 carry out pre-warmed pre-add hot plate 50, can reduce the catalysis ignition temperature of fuel, effectively suppress the generation of nitrogen oxides, The catalysis ratio of combustion of fuel is relatively complete simultaneously, can reduce the content of carbon monoxide in flue gas, thus effectively reduce harmful gas Discharge.This gas heater 100 both can make fuel burn completely, improves the efficiency of combustion of fuel, thus improves combustion gas The efficiency of heating surface of water heater 100, can reduce again the discharge of harmful gas (such as carbon monoxide and nitrogen oxides), make With safe and environment-friendly.

Wherein, the pre-heating temperature of burner 30 is controlled at 300 DEG C-400 DEG C by pre-add hot plate 50.It is to say, to In burner 30 before logical fuel, controller controls pre-add hot plate 50 and preheats burner 30, in making burner 30 Catalyst warm-up to 300 DEG C-400 DEG C, the initiation temperature of the combustion gas being finally lowered in burner 30, make fuel permissible There is flameless combustion, reduce the generation of harmful gas.

Preferably, according to an embodiment of the present utility model, pre-add hot plate 50 uses Electric heating to heat.Such as, Pre-add hot plate 50 can use Electromagnetic Heating, it is also possible to uses resistance electrothermal etc., by by pre-add hot plate 50 and burner 30 It is connected, burner 30 can be preheated, i.e. the catalyst in burner 30 can be preheated, thus reduce combustion The initiation temperature of material, thus deepen the degree of oxidation of fuel, make fuel that flameless combustion to occur under the conditions of relatively low initiation temperature, Reduce the generation of harmful gas, more environmentally-friendly.

Alternatively, according to an embodiment of the present utility model, catalyst is precious metal material part or non-metallic material. In specific embodiments more of the present utility model, catalyst is coated on the internal face of burner 30.Specifically, burner The inner surface of 30 is coated with layer of precious metal, and combustion gas enters in burner 30, and the noble metal on the inner surface of burner 30 is permissible Combustion gas is catalyzed, under noble metal effect, the initiation temperature of fuel can be reduced to 350 DEG C, significantly reduce combustion Burner 30 burner temperature, the generation of suppression nitrogen oxides, catalyst can make Oxidation of Carbon Monoxide become carbon dioxide, with this simultaneously Reduce the purpose of noxious gas emission.

In other specific embodiments of the present utility model, being provided with catalyst carrier in burner 30, catalyst is coated in urges The surface of agent carrier.Preferably, catalyst carrier is ceramic honey comb.High temperature resistant 1200 DEG C, it is ensured that in burner 30 The reliability of catalyst, thus increase the service life.When the mixed gas of air with combustion gas enters in burner 30, catalysis Fuel can be catalyzed by the catalyst on agent carrier, makes fuel generation flameless catalytic combustion, direct with correlation technique Burning is compared, and the initiation temperature of the fuel in this burner 30 is relatively low, can effectively suppress the generation of nitrogen oxides, simultaneously The catalysis ratio of combustion making fuel is relatively complete, the content of the carbon monoxide in reduction flue gas.

In specific embodiments more of the present utility model, it is provided with temperature detector 31 in burner 30 with detection catalyst Heating-up temperature.Specifically, the heating-up temperature of catalyst is T, if T ＞ 400 DEG C, controller controls blower fan 70 and gas proportion Valve 80 is respectively started with to hybrid chamber conveying air and combustion gas；If T ＞ 700 DEG C, controller controls pre-add hot plate 50 and stops adding Heat.

Specifically, controller output signal fan 70 and gas ratio valve 80, blower fan 70 runs after receiving signal, it is provided that Air and power；Gas ratio valve 80 is opened after receiving signal, arranges (usually venturi side, injection region in blast tube Formula), after blower fan 70 runs, injection gas, provide combustion gas, combustion gas to carry out fully in entering hybrid chamber with air for burning Mixing, then the catalyst in burner 30 and burner 30 is preheated by pre-add hot plate 50, due to pre-add hot plate Catalyst is preheated by 50 the most, and when the mixture of gas/air enters in burner 30, fuel is at catalyst Realizing flameless catalytic combustion under effect, burning produces high-temperature flue gas can carry out heat exchange with heat exchanger 40, is transmitted by heat To the water of flowing in heat exchanger 40 so that water heater produces hot water, high-temperature flue gas and heat exchanger 40 after heat exchanges, Temperature reduces, and finally gets rid of outside gas heater 100.

Needing exist for explanation, owing to fuel occurs flameless catalytic combustion in burner 30, this catalysis burning is self-sustaining Reaction, as long as when temperature reaches more than 700 DEG C, and has gas/air to supply, and catalysis burning just can persistently be carried out.

Thus, the fuel in this gas heater 100 carries out flameless catalytic combustion, and burning relaxes, can be greatly reduced combustion Burning noise, combustion process safety simultaneously is higher, furthermore, the catalyst in burner 30 can reduce maintenance combustion reaction institute The reaction temperature needed, saves the combustion reaction consumption to fuel combustion energy itself, it is achieved carbon monoxide and nitrogen oxides Low emission, energy-conserving and environment-protective.

Advantageously, according to an embodiment of the present utility model, in hybrid chamber, it is provided with spoiler or damping piece (not shown), So that air is sufficiently mixed with combustion gas.Specifically, the burner 30 of gas heater 100 is before work, and system needs sky Gas all premixes in hybrid chamber with combustion gas, when blower fan 70 and gas ratio valve 80 are respectively to hybrid chamber input air During with combustion gas, spoiler in hybrid chamber and damping piece can upset the flow direction of air and combustion gas, so that air and combustion gas Mix sufficiently uniformly, it is ensured that the flameless catalytic combustion of fuel.

It addition, according to an embodiment of the present utility model, gas heater 100 also includes exhaust fume collecting hood 90, exhaust fume collecting hood 90 Being connected with heat exchanger 40 and turn on air vent 12, exhaust fume collecting hood 90 is used for collecting and discharging and burner 30 burning generation Flue gas, finally arranges flue gas to outdoor.With reference to Fig. 1, in the present embodiment, exhaust fume collecting hood 90 is located at the lower section of heat exchanger 40, Heat exchanger 40 has smoke inlet and outlet flue, and the smoke inlet of heat exchanger 40 connects with burner 30, the smoke of heat exchanger 40 Mouth connects with exhaust fume collecting hood 90, and the fuel in burner 30 is carried out the high-temperature flue gas of flameless catalytic combustion generation and entered by smoke inlet Enter in heat exchanger 40, after the water of the flowing in high-temperature flue gas and heat exchanger 40 carries out heat exchange, from outlet flue, be discharged to exhaust fume collecting hood 90 In, discharge the external world finally by the smoke exhaust pipe on exhaust fume collecting hood 90.

Wherein, gas heater 100 also includes buffering water pot 41, and buffering water pot 41 is located in receiving chamber 13, buffers water pot 41 connect in water (flow) direction between outlet with hot water outlet and respectively with outlet and hot water outlet.With reference to Fig. 1, Buffering in water pot 41 is located at the receiving chamber 13 of housing 10 and be positioned at the top of heat exchanger 40, the cold water in heat exchanger 40 passes through After heat exchange, in entrance buffering water pot 41, carry out pressure release, along with the carrying out of heat transfer process, the hot water in buffering water pot 41 It is gradually increased, if user needs hot water, valve can be opened, take hot water, thus provide the user enough lives Use water.Switch electromagnetic valve/electric T-shaped valve and condensed water box 91, switch electromagnetic valve/electric T-shaped valve it is additionally provided with in housing 10 Can realize the switching in water route, condensed water box 91 can change thermogenetic condensed water with collection system, finally gets rid of gas heater Outside 100.

In specific embodiments more of the present utility model, heat exchanger 40 includes First Heat Exchanger 40a and the second heat exchanger 40b, First Heat Exchanger 40a is located at the top of the second heat exchanger 40b and between burner 30 and the second heat exchanger 40b.Burning The high-temperature flue gas that fuel in device 30 produces after carrying out flameless catalytic combustion can respectively enter First Heat Exchanger 40 and second and change In hot device 40, carry out heat exchange with the cold water in the water pipe in First Heat Exchanger 40a and the second heat exchanger 40b the most respectively, make First Heat Exchanger 40a and the second heat exchanger 40b produce respectively hot water for user use, by arranging two in housing 10 Individual heat exchanger 40, can improve the efficiency of heating surface of gas heater 100, it is ensured that user can water demand, user in real time Experience more preferably.

Other of gas heater 100 according to this utility model embodiment constitute and operate for ordinary skill people It is all known for Yuan, is not detailed herein.

In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " The orientation of the instruction such as " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " or position relationship For based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description rather than refer to Show or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not manage Solve as to restriction of the present utility model.

Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed Or implicitly include at least one this feature.In description of the present utility model, " multiple " are meant that at least two, example Such as two, three etc., unless otherwise expressly limited specifically.

In this utility model, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " Gu Fixed " etc. term should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can Be mechanically connected, it is also possible to be electrical connection or each other can communication；Can be to be joined directly together, it is also possible to by between intermediary Connect connected, can be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction. For the ordinary skill in the art, concrete in this utility model of above-mentioned term can be understood as the case may be Implication.

In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score Can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, Fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature Or oblique upper, or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or it is special to be merely representative of first Levy level height less than second feature.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ", Or specific features, structure, material or the feature that the description of " some examples " etc. means to combine this embodiment or example describes It is contained at least one embodiment of the present utility model or example.In this manual, the schematic representation to above-mentioned term Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, ability The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in territory Row combines and combination.

Although above it has been shown and described that embodiment of the present utility model, it is to be understood that above-described embodiment is example Property, it is impossible to being interpreted as restriction of the present utility model, those of ordinary skill in the art can in the range of this utility model Above-described embodiment be changed, revise, to replace and modification.

Claims (14)

1. a gas heater, it is characterised in that including:

Housing, defines receiving chamber in described housing, described housing has air vent, hot water outlet and cooling water inlet；

Premixing cavity shell, described premixing cavity shell is located at described receiving intracavity, defines hybrid chamber in described premixing cavity shell；

Burner, described burner is located at the lower section of described hybrid chamber, and described burner turns on described hybrid chamber, is provided with the described burner of catalysis and is smokelessly catalyzed the catalyst of burning in described burner；

Heat exchanger, described heat exchanger is located at the lower section of described burner and is connected with described burner to absorb the heat that described burner combustion produces, described heat exchanger has water inlet and outlet, and described water inlet turns on described cooling water inlet, and described outlet turns on described hot water outlet；

Pre-add hot plate, described pre-add hot plate is connected to preheat described burner with described burner；

Controller, described controller be connected with described pre-add hot plate with control described pre-add hot plate heating-up temperature.

Gas heater the most according to claim 1, it is characterized in that, also include blower fan and gas ratio valve, described blower fan is connected with described controller respectively with described gas ratio valve, described blower fan is located at the top of described hybrid chamber to carry air to described hybrid chamber, and described gas ratio valve is connected with described burner with to the described combustion gas of conveying of described hybrid chamber.

Gas heater the most according to claim 1, it is characterised in that the pre-heating temperature of described burner is controlled at 300 DEG C-400 DEG C by described pre-add hot plate.

Gas heater the most according to claim 1, it is characterised in that described pre-add hot plate uses Electric heating to heat.

Gas heater the most according to claim 1, it is characterised in that described catalyst is precious metal material part or non-metallic material.

Gas heater the most according to claim 5, it is characterised in that described catalyst is coated on the internal face of described burner.

Gas heater the most according to claim 5, it is characterised in that be provided with catalyst carrier in described burner, described catalyst is coated in the surface of described catalyst carrier.

Gas heater the most according to claim 7, it is characterised in that described catalyst carrier is ceramic honey comb.

Gas heater the most according to claim 2, it is characterised in that be provided with temperature detector in described burner to detect the heating-up temperature of described catalyst.

Gas heater the most according to claim 9, it is characterized in that, the heating-up temperature of described catalyst is T, if T ＞ 400 DEG C, described controller controls described blower fan and is respectively started to carry described air and described combustion gas to described hybrid chamber with described gas ratio valve；If T ＞ 700 DEG C, described controller controls described pre-add hot plate and stops heating.

11. gas heaters according to claim 2, it is characterised in that be provided with spoiler or damping piece in described hybrid chamber, to be sufficiently mixed described air with described combustion gas.

12. gas heaters according to claim 1, it is characterised in that also include exhaust fume collecting hood, described exhaust fume collecting hood is connected with described heat exchanger and turns on described air vent, and described exhaust fume collecting hood is for the flue gas collected and discharge produces with described burner combustion.

13. gas heaters according to claim 1, it is characterized in that, also include buffering water pot, described buffering water pot is located at described receiving intracavity, and described buffering water pot connects in water (flow) direction between described outlet with described hot water outlet and respectively with described outlet and described hot water outlet.

14. gas heaters according to claim 1, it is characterised in that described heat exchanger includes First Heat Exchanger and the second heat exchanger, described First Heat Exchanger is located at the top of described second heat exchanger and between described burner and described second heat exchanger.