CN114992633A - Burner, gas water heater and control method of gas water heater - Google Patents

Abstract

The invention discloses a combustor, a gas water heater and a control method of the gas water heater. Wherein the burner comprises a housing, a preheating burner, a gas injection assembly and a control assembly; a first combustion chamber and a second combustion chamber which are communicated in sequence are formed in the shell; the preheating burner is used for flaming in the first combustion chamber to generate preheating combustion and conveying flue gas generated by the combustion to the second combustion chamber; the plurality of fuel gas injection ports are used for injecting fuel gas to the second combustion chamber so as to generate high-temperature air combustion reaction in the second combustion chamber; the control assembly is used for controlling the opening or closing of the fuel gas injection port. The burner provided by the embodiment of the invention can adjust the opening or closing state of the gas injection port according to different heat load requirements of the gas water heater, so that the gas sprayed from the gas injection port can participate in high-temperature air combustion reaction, the gas utilization rate is increased, the effect of fully combusting and reducing the emission of pollutants such as NOx, CO and the like is achieved.

Description

Burner, gas water heater and control method of gas water heater

Technical Field

The invention relates to the technical field of combustion, in particular to a combustor, a gas water heater and a control method of the gas water heater.

Background

The gas water heater transfers heat to cold water flowing through a heat exchanger in a combustion heating mode to realize hot water preparation. Among the current gas heater, carry out the burning in importing the combustion chamber with the gas, because gas and air mix the inequality, the burning is insufficient in the combustion chamber, produces nitrogen oxide and carbon monoxide easily, and the combustion product causes environmental pollution easily.

Disclosure of Invention

The invention mainly aims to provide a combustor, and aims to solve the technical problems that in the existing gas water heater, combustion in a combustion chamber is insufficient, and more pollutants such as NOx, CO and the like are easily discharged.

In order to achieve the purpose, the combustor provided by the invention comprises a shell, a preheating combustor, a fuel gas injection assembly and a control assembly; a first combustion chamber and a second combustion chamber which are communicated in sequence are formed in the shell; the preheating burner is arranged in the shell and used for spraying fire in the first combustion chamber to generate preheating combustion and conveying flue gas generated by combustion to the second combustion chamber; the fuel gas injection assembly comprises a plurality of fuel gas injection ports communicated with the second combustion chamber, and the fuel gas injection ports are used for injecting fuel gas to the second combustion chamber so as to generate a high-temperature air combustion reaction in the second combustion chamber; the control assembly is used for controlling the opening or closing of the gas injection port.

In an embodiment of the present invention, the preheating burner is a fire grate assembly, and the fire grate assembly includes a plurality of fire grate units arranged side by side;

the control assembly is also used for controlling the fire grate monomer to be opened or closed.

In an embodiment of the present invention, a plurality of the gas injection ports are distributed on a side wall of the housing side by side, and one of the gas injection ports is disposed corresponding to one of the fire grate units;

the control assembly is further used for controlling the gas injection ports corresponding to the opened fire grate single body positions to be opened, and/or controlling the gas injection ports corresponding to the unopened fire grate single body positions to be closed.

In an embodiment of the present invention, the gas injection assembly further includes a high temperature gas pipe and a high temperature gas distributing rod, the high temperature gas pipe is used for externally connecting gas, and the high temperature gas distributing rod is communicated with the high temperature gas pipe and the plurality of gas injection ports;

the control assembly comprises a high-temperature section valve which is in control connection with the high-temperature gas distributing rod.

In an embodiment of the invention, the fire grate assembly further comprises a fire grate gas distributing rod communicated with the plurality of fire grate units, and the fire grate gas distributing rod is externally connected with a fire grate gas pipe;

the control assembly further comprises a fire grate sectional valve in control connection with the fire grate gas distributing rod.

In an embodiment of the present invention, the fire grate monomers are divided into a first fire grate monomer group and a second fire grate monomer group; the plurality of fuel gas injection ports are divided into a first fuel gas injection port group and a second fuel gas injection port group, the first fuel gas injection port group corresponds to the first fire row single body group, and the second fuel gas injection port group corresponds to the second fire row single body group;

the fire row sectional valve is used for controlling the first fire row single body group to be opened or closed, and the high-temperature sectional valve is used for controlling the first fuel gas injection port group to be opened or closed; and/or the fire grate segment valve is used for controlling the second fire grate single group to be opened or closed, and the high-temperature segment valve is used for controlling the second gas injection port group to be opened or closed.

In an embodiment of the present invention, the fire grate assembly further comprises an igniter, and the igniter is arranged at the top of the fire grate assembly; the fire row sectional valve is used for controlling one group of the first fire row single group and the second fire row single group close to the igniter to be opened, and controlling one group of the second fire row single group far away from the igniter to be closed.

In an embodiment of the present invention, the burner further includes a gas supply pipe, the gas supply pipe including:

the gas main pipe is used for being externally connected with a gas source;

the first gas branch pipe is communicated with the gas main pipe and the preheating burner; and

the second gas branch pipe is communicated with the gas main pipe and the gas injection assembly;

and the first gas branch pipe and the second gas branch pipe are respectively provided with a gas valve.

In an embodiment of the invention, the housing further comprises a mounting chamber for mounting the fire grate assembly, the mounting chamber is communicated with the first combustion chamber, and the mounting chamber is provided with an air inlet; the combustor still includes the fan, the air-out side of fan with air inlet connects.

In order to achieve the above object, the present invention further provides a gas water heater, comprising a heat exchanger and the above burner, wherein the heat exchanger is connected to a second combustion chamber of the burner to produce hot water by heat generated by the second combustion chamber; the burner comprises a shell, a preheating burner, a fuel gas injection assembly and a control assembly; a first combustion chamber and a second combustion chamber which are communicated in sequence are formed in the shell; the preheating burner is arranged in the shell and used for spraying fire in the first combustion chamber to generate preheating combustion and conveying flue gas generated by combustion to the second combustion chamber; the fuel gas injection assembly comprises a plurality of fuel gas injection ports communicated with the second combustion chamber, and the fuel gas injection ports are used for injecting fuel gas to the second combustion chamber so as to generate a high-temperature air combustion reaction in the second combustion chamber; the control assembly is used for controlling the opening or closing of the gas injection port.

In an embodiment of the present invention, the control component is configured to obtain a load required by the gas water heater;

controlling part of fire grate units in the fire grate assembly to be closed according to the required load of the gas water heater;

and controlling the gas injection ports corresponding to the positions of the unopened fire row single bodies to be closed according to the unopened fire row single bodies.

In an embodiment of the present invention, the control component is further configured to control the fire grate unit in the fire grate component to be opened according to a required load of the gas water heater;

and controlling the gas injection ports corresponding to the positions of the opened fire row single bodies to be opened according to the opened fire row single bodies.

In order to achieve the above object, the present invention further provides a control method of a gas water heater, which is used for the gas water heater, and the control method includes:

acquiring the load required by the gas water heater;

controlling part of fire grate units in the fire grate component to be closed according to the required load of the gas water heater;

and controlling the gas injection ports corresponding to the positions of the unopened fire row single bodies to be closed according to the unopened fire row single bodies.

In an embodiment of the present invention, the control method further includes:

controlling the fire grate monomer in the fire grate component to be opened according to the required load of the gas water heater;

and controlling the gas jet opening corresponding to the position of the opened fire row single body to open according to the opened fire row single body.

In the burner of the embodiment of the invention, the first combustion chamber and the second combustion chamber which are sequentially communicated are formed in the shell, the preheating burner is arranged in the shell and is used for spraying fire in the first combustion chamber to generate preheating combustion and conveying smoke generated by combustion to the second combustion chamber, and meanwhile, the gas injection assembly comprises a plurality of gas injection ports communicated with the second combustion chamber and is used for injecting gas to the second combustion chamber so as to achieve the effect of absorbing high-temperature smoke to preheat gas and air, thereby generating high-temperature air combustion reaction in the second combustion chamber. Meanwhile, the control component controls the opening or closing of the gas injection port in the embodiment, so that when the burner is applied to a gas water heater, the opening or closing state of the gas injection port can be adjusted according to different heat load requirements of the gas water heater, the gas sprayed out of the gas injection port can participate in high-temperature air combustion reaction, the gas utilization rate is increased, full combustion is achieved, and the effect of reducing emission of pollutants such as NOx, CO and the like is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of an embodiment of a burner of the present invention;

FIG. 2 is a schematic structural diagram of a control assembly, a fire grate assembly and a gas injection assembly in an embodiment of the invention;

FIG. 3 is a schematic structural view of a fire grate assembly and a gas injection assembly in an embodiment of the present invention;

FIG. 4 is a schematic flow chart illustrating a control method of a gas water heater according to an embodiment of the present invention;

fig. 5 is a flow chart of another embodiment of the control method of the gas water heater of the invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a combustor which is suitable for gas water heaters, and related products and equipment such as gas wall-mounted furnaces and the like which use high-temperature hot water generated by gas combustion for household bathing, heating and the like, and aims to effectively reduce the emission of pollutants (CO and NOx). For convenience of understanding, the following description will be given by way of example of application to a gas water heater.

In an embodiment of the present invention, as shown in fig. 1 to 3, the burner includes a housing 100, a preheating burner, a gas injection assembly 300, and a control assembly.

A first combustion chamber 110 and a second combustion chamber 120 which are communicated with each other in sequence are formed in the housing 100;

the preheating burner is arranged in the shell 100 and used for spraying fire in the first combustion chamber 110 to generate preheating combustion and conveying flue gas generated by combustion to the second combustion chamber 120;

the gas injection assembly 300 comprises a plurality of gas injection ports 301 communicated with the second combustion chamber 120, and the plurality of gas injection ports 301 are used for injecting gas into the second combustion chamber 120 so as to generate a high-temperature air combustion reaction in the second combustion chamber 120;

the control assembly is used for controlling the opening or closing of the gas injection port 301.

The first combustion chamber 110 and the second combustion chamber 120 which are sequentially communicated are formed in the casing 100, the preheating burner can preheat and burn in the first combustion chamber 110, heat the first combustion chamber 110 to a target temperature, and convey high-temperature flue gas generated by burning to the second combustion chamber 120, at this time, the fuel gas is sprayed towards the second combustion chamber 120 through the fuel gas spraying port 301 of the fuel gas spraying assembly 300, the high-temperature flue gas conveyed from the first combustion chamber 110 can be entrained, the effect of diluting the fuel gas and air is achieved while preheating the fuel gas, so that a high-temperature air combustion (MILD combustion) reaction is generated, the second combustion chamber 120 is in a high-temperature low-oxygen environment, the temperature of the fuel gas and the air is higher than the self-ignition temperature of the fuel gas, the maximum temperature rise in the combustion process is lower than the self-ignition temperature of the fuel gas, and the volume fraction of the oxygen is diluted to an extremely low concentration by combustion products. In this combustion state, compared to conventional combustion, the pyrolysis of the fuel is suppressed, the flame thickness becomes thicker, and the flame front disappears, so that the temperature is very uniform throughout the second combustion chamber 120, the combustion peak temperature is low and the noise is very small, and the emissions of pollutants NOx and CO are greatly reduced.

However, in practical applications, when the burner is applied to a gas water heater, since the combustion load requirements of the gas water heater are different in winter, summer and spring and autumn, the load requirements of the burner are also different, and according to different load requirements, the preheating combustion effect of the preheating burner on the first combustion chamber 110 may also be different, and accordingly, the capacity and the position of the high-temperature flue gas delivered to the second combustion chamber 120 may also be changed correspondingly, on this basis, the conditions of the high-temperature air combustion reaction in some areas may not be achieved. Based on this, in the present embodiment, the gas injection assembly 300 includes a plurality of gas injection ports 301 communicated with the second combustion chamber 120, each gas injection port 301 can inject gas towards the second combustion chamber 120, and the opening or closing of the plurality of gas injection ports 301 is controlled by the control assembly, so as to realize adjustment of the position, injection intensity, gas size, injection speed, and the like of the gas injection assembly 300 for injecting gas into the second combustion chamber 120, so as to adapt to different heat load requirements, ensure that the gas injected into the second combustion chamber 120 can participate in the high temperature air combustion reaction, and achieve sufficient combustion to reduce the emission of pollutants such as NOx and CO.

It can be understood that the specific state of the control component controlling the opening or closing of the gas injection ports 301 needs to be determined according to the actual situation, for example, when in winter, the heat load demand of the gas water heater is large or the full load demand, at this time, the preheating burner is fully opened, then the whole area of the first combustion chamber 110 is preheated and combusted, that is, the first combustion chamber 110 can convey high-temperature flue gas to the second combustion chamber 120 in multiple directions, based on this, the control component can control the multiple gas injection ports 301 of the gas injection component 300 to be opened, so that the gas injected to the second combustion chamber 120 can absorb the high-temperature flue gas, and thus each area inside the second combustion chamber 120 can generate high-temperature air reaction. When in summer, the heat load demand of the gas water heater is smaller, the preheating burner is partially opened at the moment, then the partial region in the first combustion chamber 110 can preheat and burn, the first combustion chamber 110 can only convey high-temperature flue gas to the partial region in the second combustion chamber 120, at the moment, in order to ensure that the gas injected into the second combustion chamber 120 can generate high-temperature air reaction, the control assembly can only control the gas injection ports 301 corresponding to the high-temperature flue gas positions to be opened, and control the gas injection ports 301 without the high-temperature flue gas positions to be closed, so that the phenomenon that the gas injected by the gas injection ports 301 without the high-temperature flue gas positions cannot reach the preheating effect and cannot generate the high-temperature air reaction is generated. Similarly, when the water heater is used in spring and autumn, the heat load of the gas water heater can be determined according to actual conditions, the preheating burner can be partially or completely started, correspondingly, the control component can control the corresponding partial gas injection ports 301 to be started or all the gas injection ports 301 to be started, and therefore it is guaranteed that the injected gas can generate high-temperature air combustion reaction.

It should be noted that the control module is not limited to the above-mentioned cases, and may control the opening or closing of the gas injection port 301 according to the gas injection intensity at the gas injection port 301, the diameter of the gas injection port 301, and the like. The opening or closing position of the gas injection port 301 is determined according to the actual situation, for example, a plurality of continuous gas injection ports 301 are formed into one group, one group or a plurality of groups is formed, and the like; the plurality of gas injection ports 301 may be opened or closed at intervals; or the gas injection ports 301 may be opened or closed irregularly, etc., and the specific opening positions are not illustrated in a row.

Alternatively, the specific structure of the preheating burner is not limited, and may be a fire grate burner, a jet burner, a fully premixed burner or a semi-premixed burner, etc.

In this embodiment, the heat obtained after the combustion reaction of the high-temperature air in the second combustion chamber 120 can exchange heat with a heat exchanger in the gas water heater, so as to achieve the function of producing hot water.

In the burner of the embodiment of the present invention, the first combustion chamber 110 and the second combustion chamber 120 are sequentially communicated with each other and formed in the housing 100, the preheating burner is disposed in the housing 100 to spray fire in the first combustion chamber 110 to generate preheating combustion and to deliver flue gas generated by combustion to the second combustion chamber 120, and the gas injection assembly 300 includes a plurality of gas injection ports 301 communicated with the second combustion chamber 120 to inject gas into the second combustion chamber 120 to achieve the effect of entraining high-temperature flue gas to preheat gas and air, so as to generate a high-temperature air combustion reaction in the second combustion chamber 120. Meanwhile, the opening or closing of the gas injection port 301 is controlled by the control assembly in the embodiment, so that when the burner is applied to a gas water heater, the opening or closing state of the gas injection port 301 can be adjusted according to different heat load requirements of the gas water heater, so that the gas sprayed out of the gas injection port 301 can participate in high-temperature air combustion reaction, the gas utilization rate is increased, sufficient combustion is achieved, and the emission of pollutants such as NOx and CO is reduced.

In an embodiment of the present invention, referring to fig. 1 to 3, the preheating burner is a fire grate assembly 200, and the fire grate assembly 200 includes a plurality of fire grate units 201 arranged side by side; the control component is also used for controlling the fire grate monomer 201 to be opened or closed.

It can be understood that when the preheating burner is the fire row subassembly 200, let in the gas in arranging monomer 201 towards the fire in order to draw jet air, form the mist in arranging the inside pipeline of monomer 201 at the fire to arrange monomer 201's bocca orientation first combustion chamber 110 blowout from the fire, light the formation flame of blowout mist through some firearm, thereby realize arranging monomer 201's bocca blowout flame's function from the fire.

In this embodiment, a plurality of fire grate units 201 that set up side by side have formed fire grate assembly 200, and the opening or closing of each fire grate unit 201 all can be controlled through the control assembly, in the practical application process, gas heater can have different heat load demands in different seasons, then according to different heat load demands, can open whole fire grate unit 201 or partial fire grate unit 201, wherein the fire grate unit 201 of opening can spout flame towards first combustion chamber 110 to the position burning that corresponds produces high temperature flue gas at it.

In the practical application process, for example, when in winter, the heat load demand of gas heater is higher or the demand is full, then the whole fire grate unit 201 of the steerable of control assembly is all opened, flame all can be erupted towards first combustion chamber 110 in the flame jet department of whole fire grate assembly 200 this moment, then the top of the whole fire grate assembly 200 that corresponds all can produce the high temperature flue gas, thereby make inside corresponding position of second combustion chamber 120 have the high temperature flue gas to carry over, can open through the most of control assembly control gas jet assembly 300 or whole gas jet orifice 301 this moment, in order to spray the gas towards second combustion chamber 120, reach the effect of preheating the entrainment high temperature flue gas, and then produce the high temperature air burning. When summer, the heat load demand of gas heater is less, the part that the control assembly can control among a plurality of fire row monomer 201 is opened the part and is closed, only can open fire row monomer 201 this moment can spray flame towards first combustion chamber 110, and the fire row monomer 201 that does not open can not spray flame, correspondingly, the high temperature flue gas of carrying to in the second combustion chamber 120 probably only exists in the subregion, can close through the corresponding gas jet orifice 301 of control assembly control and fire row monomer 201 that does not open this moment, prevent to spray the gas towards the region that does not have the high temperature flue gas, only spray the gas towards the region that has the high temperature flue gas, all can participate in high temperature air combustion with the assurance spun gas.

Specifically, a plurality of the gas injection ports 301 are distributed on the side wall of the casing 100 side by side, and one gas injection port 301 is arranged corresponding to one fire grate unit 201;

the control component is further used for controlling the gas injection ports 301 corresponding to the positions of the fire row single bodies 201 to be opened, and/or controlling the gas injection ports 301 corresponding to the positions of the fire row single bodies 201 which are not opened to be closed.

It is understood that the second combustion chamber 120 is a chamber formed inside the casing 100, and the gas injection port 301 is provided at a side wall of the casing 100 for injecting gas toward the second combustion chamber 120. The plurality of gas injection ports 301 are distributed on the side wall of the casing 100 side by side and consistent with the arrangement mode of the plurality of fire row units 201, wherein one gas injection port 301 is arranged corresponding to one fire row unit 201, so that high-temperature flue gas generated by flame sprayed by the fire row units 210 can be smoothly conveyed to the gas injection path of the corresponding gas injection port 301 to preheat the gas sprayed by the corresponding gas injection port 301.

On the basis of the foregoing embodiment, when the heat load demands of the gas water heaters are different, the opening state of the fire grate unit 201 and the opening state of the gas injection port 301 are different. When the heat load requirement is large, the control assembly controls all the fire grate units 201 to be opened, and accordingly, the control assembly can control most or all the gas injection ports 301 to be opened so as to achieve high-temperature combustion reaction. When the heat load demand is less, the fire row monomer 201 of control assembly control section opens, then have partial fire row monomer to close, in order to guarantee that the gas homoenergetic that erupts this moment can participate in the high temperature air reaction, then the controllable gas jet orifice 301 corresponding with the fire row monomer 201 position that does not open of control assembly closes, the gas jet orifice 301 corresponding with the fire row monomer 201 position that opens is controlled simultaneously and is whole or the part is opened to guarantee that the gas homoenergetic that erupts can participate in the high temperature air burning.

It should be noted that the opening or closing positions of the plurality of fire grate units 201 in the fire grate assembly 200 may be determined according to actual situations, for example, the fire grate units 201 that are partially continuous may be opened or closed at the same time, the fire grate units 201 that are spaced may be opened or closed, or one of two adjacent fire grate units 201 may be opened and closed, and so on. Accordingly, the opening or closing position of the gas injection port 301 is determined according to the opening or closing position of the fire row unit 201.

In an embodiment of the present invention, referring to fig. 1 to 3, the gas injection assembly 300 further includes a high-temperature gas pipe and a high-temperature gas distribution rod 330, the high-temperature gas pipe is used for externally connecting gas, and the high-temperature gas distribution rod 330 communicates the high-temperature gas pipe with the plurality of gas injection ports 301; the control assembly comprises a high-temperature section valve 410 which is in control connection with the high-temperature gas distributing rod 330.

In this embodiment, the high-temperature gas pipe is communicated with the plurality of gas injection ports 301 through the high-temperature gas distributing rod 330, so as to realize a function of conveying the gas in the high-temperature gas pipe to the plurality of gas injection ports 301. The control assembly comprises a high-temperature stage valve 410, and the high-temperature stage valve 410 is in control connection with the high-temperature gas distribution rod 330 to realize the function of controlling the opening and closing of each gas injection port 301. Alternatively, the high temperature staged valve 410 may be disposed inside the high temperature gas distributing rod 330 to provide a valve in the branch communicating with each gas injection port 301, so as to open or close different gas injection ports 301 by opening or closing different valves.

In an embodiment of the present invention, the fire grate assembly 200 further includes a fire grate gas distributing rod 230 communicated with the plurality of fire grate units 201, and the fire grate gas distributing rod 230 is externally connected with a fire grate gas pipe; the control assembly further comprises a fire exhaust section valve 420 which is in control connection with the fire exhaust gas distributor rod 230.

In this embodiment, a plurality of fire row units 201 of the fire row assembly 200 are all communicated with the fire row gas distributing rod 230 to realize the function of inputting gas into the fire row units 201. The control assembly comprises a fire row sectional valve 420, and the fire row sectional valve 420 is in control connection with the fire row gas distributing rod 230 so as to realize the opening or closing function of introducing a gas passage into each fire row single body 201 and further realize the opening or closing function of each fire row single body 201. Alternatively, the fire grate segment valve 420 may be disposed inside the fire grate gas distributor rod 230 to provide a valve in a branch communicating with each fire grate unit 201, so as to open or close different fire grate units 201 by opening or closing different valves.

In one embodiment, referring to fig. 1 to 3, the fire grate units 201 are divided into a first fire grate unit group 210 and a second fire grate unit group 220; the plurality of gas injection ports 301 are divided into a first gas injection port group 310 and a second gas injection port group 320, the first gas injection port group 310 corresponds to the first fire row single body group 210, and the second gas injection port group 320 corresponds to the second fire row single body group 220;

the fire row sectional valve 420 is used for controlling the first fire row single body group 210 to be opened or closed, and the high-temperature sectional valve 410 is used for controlling the first fuel gas injection port group 310 to be opened or closed; and/or the fire grate segment valve 420 is used for controlling the second fire grate unit group 220 to be opened or closed, and the high-temperature segment valve 410 is used for controlling the second gas injection port group 320 to be opened or closed.

In the present embodiment, the plurality of fire row single bodies 201 of the fire row assembly 200 are divided into the first fire row single body group 210 and the second fire row single body group 220, and the plurality of gas injection ports 301 of the gas injection assembly 300 are divided into the first gas injection port group 310 and the second gas injection port group 320. The fire row segmented valve 420 in the control assembly can control at least one group of the first fire row single unit group 210 and the second fire row single unit group 220 to be opened, and the high-temperature segmented valve 410 in the control assembly can control at least one group of the first fuel gas injection port group 310 and the second fuel gas injection port group 320 to be opened.

Alternatively, when the fire row segment valve 420 controls the first fire row single body group 210 to be opened and the second fire row single body group 220 to be closed, correspondingly, in order to enable the gas injected from the gas injection ports 310 to participate in the high temperature air combustion reaction, the high temperature segment valve 410 controls the first gas injection ports 310 to be opened and the second gas injection ports 320 to be closed.

Alternatively, when the fire row sectional valve 420 controls the first fire row single unit group 210 to be closed and the second fire row single unit group 220 to be opened, correspondingly, in order to enable the gas injected from the gas injection port 310 to participate in the combustion reaction of the high-temperature air, the high-temperature sectional valve 410 controls the first gas injection port group 310 to be closed and the second gas injection port group 320 to be opened.

Alternatively, when the fire row segment valve 420 controls the first fire row single-block group 210 and the second fire row single-block group 220 to be opened, the high-temperature segment valve 410 controls the first fuel gas injection port group 310 and the second fuel gas injection port group 320 to be opened.

In one embodiment of the present invention, the fire grate assembly 200 further comprises an igniter, which is disposed on the top of the fire grate assembly 200; the fire row segment valve 420 is used for controlling one group of the first fire row single group 210 and the second fire row single group 220 close to the igniter to be opened, and controlling one group far away from the igniter to be closed.

In this embodiment, when the heat load of gas heater is less, can arrange the block group through a set of fire that fire row segmentation valve 420 control is close to some firearm and open, guarantee to arrange the gaseous mixture that monomer 201 erupted from the fire and can be ignited abundant burning, prevent that the gaseous mixture that monomer 201 erupted is far away from some firearm and the condition that can't be ignited from taking place.

As an example of a 16L gas water heater, referring to fig. 3, assuming that the total load is 28KW, the number of the fire grate units 201 is 8, the number of the gas injection ports 301 is 16 (8 are respectively disposed on two opposite sides of the casing 100), that is, the 8 gas injection ports 301 located on the same side and the 8 fire grate units 201 are distributed correspondingly, and the thermal load ratio of the fire grate segment to the high-temperature combustion segment is 1: 1, the load adjusting range of each fire grate unit 201 is 1 KW-2 KW. When the load of the whole machine is less than 12KW, the load of the fire row section is less than 6KW, 5 fire row single bodies 201 far away from an igniter are controlled to be closed by the fire row sectional valve 420, 3 fire row single bodies 201 close to the igniter are controlled to work, correspondingly, 10 gas injection ports 301 (5 on two sides of the shell 100) corresponding to the 5 closed fire row single bodies 201 are controlled to be closed by the high-temperature sectional valve 410, 6 gas injection ports 301 (3 on two sides of the shell 100) corresponding to the 3 working fire row single bodies 201 are controlled to be opened, and therefore the fact that the gas sprayed out of the gas injection ports 301 can be fully preheated by high-temperature flue gas can be guaranteed, and the high-temperature air combustion state can be achieved.

In an embodiment of the present invention, referring to fig. 1 to 3, the burner further includes a gas supply pipe including a main gas pipe, a first gas branch pipe 510, and a second gas branch pipe 520;

the gas main pipe is used for being externally connected with a gas source; the first gas branch pipe 510 is communicated with the gas main pipe and the preheating burner; the second gas branch pipe 520 is communicated with the gas main pipe and the gas injection assembly 300;

the first gas branch pipe 510 is provided with a first gas valve 501, and the second gas branch pipe 520 is provided with a second gas valve 502.

It is understood that when the preheating burner is the fire grate assembly 200, the second gas branch pipe 520 is a fire grate gas pipe connected to the fire grate gas distribution rod 230, and the first gas branch pipe 510 is a high temperature gas pipe connected to the high temperature gas distribution rod 330. The first gas branch pipe 510 is provided with a first gas valve 501, the second gas branch pipe 520 is provided with a second gas valve 502, so that the first gas branch pipe 510 and the second gas branch pipe 520 can be controlled independently, optionally, the first gas valve 501 and the second gas valve 502 can be electromagnetic valves and gas proportional valves, so that the gas proportional distribution in the first gas branch pipe 510 and the second gas branch pipe 520 can be adjusted according to the load demands in different combustion chambers, and the load required by combustion is ensured.

In order to ensure the air supply for combustion, referring to fig. 1 to 3, in an embodiment of the present invention, the housing 100 further includes a mounting chamber 130 for mounting the fire grate assembly 200, the mounting chamber 130 is communicated with the first combustion chamber 110, and the mounting chamber 130 is provided with an air inlet 131; the burner further comprises a fan 600, and the air outlet side of the fan 600 is connected with the air inlet 131.

It will be appreciated that the mounting chamber 130 corresponds to an air chamber and the blower 600 delivers air through the air inlet 131 towards the mounting chamber 130 to enable the fire grate assembly 200 to draw air within the mounting chamber 130, i.e. to perform an air supply function for combustion of the fire grate assembly 200. Meanwhile, the installation chamber 130 communicates with the first combustion chamber 110 to realize a secondary air supplement function when the fire grate assembly 200 is burned at the fire hole. Further, air for combustion of high temperature air in the second combustion chamber 120 may also be provided by air in the mounting chamber 130, and optionally, an air gap is formed between two adjacent fire grate units 201, so that air can enter the second combustion chamber 120 from the air gap to provide air for combustion of high temperature air.

The invention further provides a gas water heater, referring to fig. 1, the gas water heater includes a heat exchanger 700 and a burner, the specific structure of the burner refers to the above embodiments, and since the gas water heater adopts all technical solutions of all the above embodiments, the gas water heater at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein. Wherein the heat exchanger 700 is connected to the second combustion chamber 120 of the burner to produce hot water by the heat generated from the second combustion chamber 120.

It can be understood that the heat exchanger 700 has a water inlet and a water outlet, the water inlet of the heat exchanger 700 is connected to a tap water pipe to be connected to cold water for heat exchange, the water outlet is used for connecting a water tap and a shower head of a user home through a pipeline, and a cold water joint and a hot joint are generally arranged for convenient connection; in this embodiment, the heat exchanger 700 may be a heat exchange pipe disposed on a side wall of the casing 100 corresponding to the second combustion chamber 120 to exchange heat with the second combustion chamber 120 so as to convert the input cold water into hot water. In other embodiments, the water-cooled wall may be used, and is not limited herein.

In order to reduce the pollutant emission of the gas water heater, in one embodiment of the invention, a control component in the combustor is used for acquiring the load required by the gas water heater; controlling part of the fire grate units 201 in the fire grate assembly 200 to be closed according to the required load of the gas water heater; and controlling the gas injection port 301 corresponding to the position of the unopened fire grate unit 201 to close according to the unopened fire grate unit 201.

The control assembly in the burner is also used for controlling the fire grate units 201 in the fire grate assembly 200 to be opened according to the required load of the gas water heater; and controlling the gas injection port 301 corresponding to the position of the opened fire row single body 201 to be opened according to the opened fire row single body 201.

It can be understood that when the heat load requirements of the gas water heater are different, the opening state of the fire grate unit 201 and the opening state of the gas injection port 301 are different. When the heat load requirement is larger, the control component controls all the fire grate units 201 to be opened, and correspondingly, the control component can control most or all the gas injection ports 301 to be opened so as to achieve a high-temperature combustion reaction. When the heat load demand is less, control assembly control section's fire row monomer 201 opens, then have partial fire row monomer to close, in order to guarantee that the gas homoenergetic that erupts this moment can participate in the high temperature air reaction, then the controllable gas jet orifice 301 corresponding with the fire row monomer 201 position that does not open of control assembly closes, the gas jet orifice 301 corresponding with the fire row monomer 201 position that opens is controlled simultaneously is whole or partly opened, thereby guarantee that the gas homoenergetic that erupts can participate in the high temperature air burning, in order to reach abundant burning, reduce the purpose that the pollutant is discharged like NOx and CO.

In order to achieve the above object, the present invention further provides a control method of a gas water heater, referring to fig. 1 to 5, based on the above gas water heater, the specific structure of the gas water heater refers to the above embodiments, and is not described herein again. The control method of the gas water heater comprises the following steps:

s10, acquiring the load required by the gas water heater;

s20, controlling the closing of part of fire grate units 201 in the fire grate assembly 200 according to the required load of the gas water heater;

and S30, controlling the gas injection ports 301 corresponding to the positions of the unopened fire row single bodies 201 to close according to the unopened fire row single bodies 201.

It can be understood that the heat load demand of the gas water heater can vary according to seasons, outdoor temperature, weather, etc., and when the heat load demand of the gas water heater varies, the states of the fire grate assembly 200 and the gas injection assembly 300 in the corresponding burner also vary to ensure the high-temperature air combustion reaction.

In this embodiment, when the heat load requirements of the gas water heater are different, the opening state of the fire grate unit 201 and the opening state of the gas injection port 301 are different. When the heat load demand is less, the fire row monomer 201 of control assembly control part opens, partial fire row monomer 201 closes, in order to guarantee that the gas that erupts all can participate in the high temperature air reaction this moment, then the controllable gas jet orifice 301 that corresponds with the fire row monomer 201 position that does not open of control assembly closes, the gas jet orifice 301 that corresponds with the fire row monomer 201 position that opens is controlled simultaneously is whole or partly opened, thereby guarantee that the gas that erupts all can participate in the high temperature air burning, in order to reach abundant burning, reduce the purpose that the pollutant such as NOx and CO discharged. When the heat load requirement is larger, the control component controls all the fire grate units 201 to be opened, and correspondingly, the control component can control most or all the gas injection ports 301 to be opened so as to achieve a high-temperature combustion reaction.

Further, the control method further includes:

s40, controlling the fire grate monomer 201 in the fire grate assembly 200 to be opened according to the required load of the gas water heater;

and S50, controlling the gas injection ports 301 corresponding to the positions of the opened fire row single bodies 201 to be opened according to the opened fire row single bodies 201.

In this embodiment, in order to make the effect of the high temperature air burning in the second combustion chamber 120 better, then after arranging monomer 201 and opening according to the fire of the required load control fire row subassembly 200 of gas heater, the gas jet 301 that the monomer 201 position corresponds is arranged to the control and the fire of opening all opens, with the capacity of guaranteeing the gas injection and the spray regime of guaranteeing the gas, so that sufficient gas sprays entrainment high temperature flue gas, guarantee the reactant's of high temperature air burning sufficiency, the heat that the high temperature air combustion reaction produced has been guaranteed.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (14)

1. A burner, comprising:

the combustion chamber comprises a shell, wherein a first combustion chamber and a second combustion chamber which are communicated in sequence are formed in the shell;

the preheating burner is arranged in the shell and used for flaming in the first combustion chamber to generate preheating combustion and conveying flue gas generated by combustion to the second combustion chamber;

the fuel gas injection assembly comprises a plurality of fuel gas injection ports communicated with the second combustion chamber, and the fuel gas injection ports are used for injecting fuel gas to the second combustion chamber so as to generate a high-temperature air combustion reaction in the second combustion chamber; and

and the control component is used for controlling the opening or closing of the gas injection port.

2. The burner of claim 1, wherein the preheat burner is a fire bank assembly comprising a plurality of fire bank monomers arranged side-by-side;

the control assembly is also used for controlling the fire grate monomer to be opened or closed.

3. The burner of claim 2, wherein a plurality of said gas injection ports are disposed side by side in a sidewall of said housing, one of said gas injection ports being disposed in correspondence with one of said fire row units;

the control assembly is further used for controlling the gas injection ports corresponding to the opened fire grate single body positions to be opened, and/or controlling the gas injection ports corresponding to the unopened fire grate single body positions to be closed.

4. The burner as claimed in claim 3, wherein the gas injection assembly further comprises a high temperature gas pipe and a high temperature gas distribution rod, the high temperature gas pipe is used for externally connecting gas, and the high temperature gas distribution rod is communicated with the high temperature gas pipe and the plurality of gas injection ports;

the control assembly comprises a high-temperature section valve which is in control connection with the high-temperature gas distributing rod.

5. The burner of claim 4, wherein the fire grate assembly further comprises a fire grate gas distributor bar in communication with each of the plurality of fire grate segments, the fire grate gas distributor bar circumscribing a fire grate gas tube;

the control assembly further comprises a fire grate sectional valve in control connection with the fire grate gas distributing rod.

6. The burner of claim 5, wherein a plurality of said fire row monomers are divided into a first fire row monomer group and a second fire row monomer group; the plurality of fuel gas injection ports are divided into a first fuel gas injection port group and a second fuel gas injection port group, the first fuel gas injection port group corresponds to the first fire row single body group, and the second fuel gas injection port group corresponds to the second fire row single body group;

the fire row sectional valve is used for controlling the first fire row single body group to be opened or closed, and the high-temperature sectional valve is used for controlling the first fuel gas injection port group to be opened or closed; and/or the fire grate sectional valve is used for controlling the second fire grate single group to be opened or closed, and the high-temperature sectional valve is used for controlling the second fuel injection port group to be opened or closed.

7. The burner of claim 6, wherein the burner block assembly further comprises an igniter disposed at a top portion of the burner block assembly; the fire row sectional valve is used for controlling one group of the first fire row single group and the second fire row single group close to the igniter to be opened, and controlling one group far away from the igniter to be closed.

8. The burner of any one of claims 1 to 7, further comprising a gas supply pipe, the gas supply pipe comprising:

the gas main pipe is used for being externally connected with a gas source;

the first gas branch pipe is communicated with the gas main pipe and the preheating burner; and

the second gas branch pipe is communicated with the gas main pipe and the gas injection assembly;

and the first gas branch pipe and the second gas branch pipe are respectively provided with a gas valve.

9. The burner of any one of claims 2 to 7, wherein the housing further comprises a mounting chamber for mounting the fire grate assembly, the mounting chamber being in communication with the first combustion chamber, the mounting chamber being provided with an air inlet; the combustor still includes the fan, the air-out side of fan with air inlet connects.

10. A gas water heater comprising a heat exchanger and a burner as claimed in any one of claims 3 to 9, said heat exchanger being connected to a second combustion chamber of said burner to produce hot water from heat generated by said second combustion chamber.

11. The gas water heater of claim 10, wherein said control assembly is adapted to obtain a load required for the gas water heater;

controlling part of fire grate units in the fire grate assembly to be closed according to the required load of the gas water heater;

and controlling the gas injection ports corresponding to the positions of the unopened fire row single bodies to be closed according to the unopened fire row single bodies.

12. The gas water heater of claim 11, wherein said control assembly is further configured to control the firing bar unit in said firing bar assembly to open according to a desired load of said gas water heater;

and controlling the gas jet opening corresponding to the position of the opened fire row single body to open according to the opened fire row single body.

13. A control method of a gas water heater for the gas water heater as claimed in any one of claims 10 to 12, characterized in that the control method comprises:

acquiring the load required by the gas water heater;

controlling part of fire grate units in the fire grate component to be closed according to the required load of the gas water heater;

and controlling the gas injection ports corresponding to the positions of the unopened fire row single bodies to be closed according to the unopened fire row single bodies.

14. The control method of a gas water heater as set forth in claim 13, further comprising:

controlling the fire grate monomer in the fire grate component to be opened according to the required load of the gas water heater;

and controlling the gas injection ports corresponding to the positions of the opened fire row single bodies to be opened according to the opened fire row single bodies.

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