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

Abstract

The present invention discloses a burner, a gas water heater and a control method for a gas water heater. The burner includes a shell, a preheating burner, a gas injection assembly and a control assembly; a first combustion chamber and a second combustion chamber connected in sequence are formed in the shell; the preheating burner is used to spray fire in the first combustion chamber to produce preheating combustion, and to transport the smoke generated by the combustion to the second combustion chamber; a plurality of gas injection ports are used to spray gas into the second combustion chamber to produce a high-temperature air combustion reaction in the second combustion chamber; and the control assembly is used to control the opening or closing of the gas injection port. The burner of the embodiment of the present invention can adjust the opening or closing state of the gas injection port according to the different heat load requirements of the gas water heater to ensure that the gas ejected from the gas injection port can participate in the high-temperature air combustion reaction, increase the gas utilization rate, achieve full combustion, and reduce the emission of pollutants such as NOx and CO.

Description

Technical Field

[0001] The present invention relates to the field of combustion technology, and in particular to a burner, a gas water heater and a control method for the gas water heater. Background Art

[0002] Gas water heaters use combustion heating to transfer heat to cold water flowing through a heat exchanger to prepare hot water. In existing gas water heaters, gas is input into a combustion chamber for combustion. Due to uneven mixing of gas and air, the combustion chamber is not fully burned, which easily produces nitrogen oxides and carbon monoxide, and the combustion products easily cause environmental pollution. Summary of the invention

[0003] The main purpose of the present invention is to provide a burner, which aims to solve the technical problem of incomplete combustion in the combustion chamber of the existing gas water heater, which easily generates more emissions of pollutants such as NOx and CO.

[0004] To achieve the above-mentioned purpose, the burner proposed in the present invention includes a shell, a preheating burner, a gas injection assembly and a control assembly; a first combustion chamber and a second combustion chamber connected in sequence are formed in the shell; the preheating burner is arranged in the shell, and is used to spray fire in the first combustion chamber to produce preheating combustion, and transport the smoke generated by the combustion to the second combustion chamber; the gas injection assembly includes a plurality of gas injection ports connected to the second combustion chamber, and the plurality of gas injection ports are used to inject gas into the second combustion chamber to produce a high-temperature air combustion reaction in the second combustion chamber; the control assembly is used to control the opening or closing of the gas injection ports.

[0005] In one embodiment of the present invention, the preheating burner is a fire bar assembly, and the fire bar assembly includes a plurality of fire bar monomers arranged side by side;

[0006] The control component is also used to control the opening or closing of the fire bar unit.

[0007] In one embodiment of the present invention, a plurality of the gas injection ports are arranged side by side on the side wall of the shell, and one gas injection port is arranged corresponding to one fire bar unit;

[0008] The control component is also used to control the opening of the gas injection port corresponding to the opened fire grate unit position, and / or control the closing of the gas injection port corresponding to the unopened fire grate unit position.

[0009] In one embodiment of the present invention, the gas injection assembly further includes a high-temperature gas pipe and a high-temperature gas distribution rod, the high-temperature gas pipe is used to connect external gas, and the high-temperature gas distribution rod connects the high-temperature gas pipe with the plurality of gas injection ports;

[0010] The control assembly includes a high-temperature sectional valve which is controllably connected to the high-temperature fuel gas distribution rod.

[0011] In one embodiment of the present invention, the fire bar assembly further comprises a fire bar gas distribution rod connected to the plurality of fire bar monomers, and the fire bar gas distribution rod is externally connected to the fire bar gas pipe;

[0012] The control assembly also includes a fire exhaust section valve which is controllably connected to the fire exhaust gas distribution rod.

[0013] In one embodiment of the present invention, the plurality of fire bar monomers are divided into a first fire bar monomer group and a second fire bar monomer group; the plurality of gas injection ports are divided into a first gas injection port group and a second gas injection port group, the first gas injection port group corresponds to the first fire bar monomer group, and the second gas injection port group corresponds to the second fire bar monomer group;

[0014] The fire grate sectional valve is used to control the opening or closing of the first fire grate monomer group, and the high-temperature sectional valve is used to control the opening or closing of the first gas injection port group; and / or, the fire grate sectional valve is used to control the opening or closing of the second fire grate monomer group, and the high-temperature sectional valve is used to control the opening or closing of the second gas injection port group.

[0015] In one embodiment of the present invention, the fire bar assembly also includes an igniter, which is arranged at the top of the fire bar assembly; the fire bar section valve is used to control the opening of a group of the first fire bar monomer group and the second fire bar monomer group close to the igniter, and control the closing of a group away from the igniter.

[0016] In one embodiment of the present invention, the burner further comprises a gas supply pipe, and the gas supply pipe comprises:

[0017] A gas main pipe, the gas main pipe is used to connect to an external gas source;

[0018] a first gas branch pipe, the first gas branch pipe connecting the gas main pipe and the preheating burner; and

[0019] a second gas branch pipe, the second gas branch pipe being connected with the gas main pipe and the gas injection assembly;

[0020] The first gas branch pipe and the second gas branch pipe are both provided with a gas valve.

[0021] In one embodiment of the present invention, the shell also includes an installation chamber for installing the fire bar assembly, the installation chamber is connected to the first combustion chamber, and the installation chamber is provided with an air inlet; the burner also includes a fan, and the air outlet side of the fan is connected to the air inlet.

[0022] To achieve the above-mentioned purpose, the present invention also provides a gas water heater, comprising a heat exchanger and the above-mentioned burner, wherein the heat exchanger is connected to the second combustion chamber of the burner to produce hot water through the heat generated by the second combustion chamber; the burner comprises a shell, a preheating burner, a gas injection assembly and a control assembly; a first combustion chamber and a second combustion chamber connected in sequence are formed in the shell; the preheating burner is arranged in the shell, and is used to spray fire in the first combustion chamber to produce preheating combustion, and to transport the smoke generated by the combustion to the second combustion chamber; the gas injection assembly comprises a plurality of gas injection ports connected to the second combustion chamber, and the plurality of gas injection ports are used to inject gas into the second combustion chamber to produce a high-temperature air combustion reaction in the second combustion chamber; the control assembly is used to control the opening or closing of the gas injection ports.

[0023] In one embodiment of the present invention, the control component is used to obtain the load required by the gas water heater;

[0024] Controlling some of the fire bar units in the fire bar assembly to close according to the required load of the gas water heater;

[0025] According to the unopened fire grate unit, the gas injection port corresponding to the position of the unopened fire grate unit is controlled to be closed.

[0026] In one embodiment of the present invention, the control component is further used to control the opening of the fire bar unit in the fire bar component according to the required load of the gas water heater;

[0027] According to the opened fire grate unit, the gas injection port corresponding to the position of the opened fire grate unit is controlled to open.

[0028] To achieve the above object, the present invention further provides a control method for a gas water heater, which is used for the above gas water heater, and the control method comprises:

[0029] Obtain the load required by the gas water heater;

[0030] Controlling some of the fire bar units in the fire bar assembly to close according to the required load of the gas water heater;

[0031] According to the unopened fire grate unit, the gas injection port corresponding to the position of the unopened fire grate unit is controlled to be closed.

[0032] In one embodiment of the present invention, the control method further includes:

[0033] Controlling the fire bar unit in the fire bar assembly to open according to the required load of the gas water heater;

[0034] According to the opened fire grate unit, the gas injection port corresponding to the position of the opened fire grate unit is controlled to open.

[0035] In the burner of the embodiment of the present invention, a first combustion chamber and a second combustion chamber connected in sequence are formed in the shell. A preheating burner is arranged in the shell to spray fire in the first combustion chamber to generate preheating combustion, and the smoke generated by the combustion is transported to the second combustion chamber. At the same time, the gas injection assembly includes a plurality of gas injection ports connected to the second combustion chamber, which are used to inject gas into the second combustion chamber to achieve the effect of entraining high-temperature smoke to preheat the gas and air, thereby generating a high-temperature air combustion reaction in the second combustion chamber. At the same time, in this embodiment, the opening or closing of the gas injection port is controlled by the control assembly, 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 the different heat load requirements of the gas water heater, so as to ensure that the gas ejected from the gas injection port can participate in the high-temperature air combustion reaction, increase the gas utilization rate, achieve full combustion, and reduce the emission of pollutants such as NOx and CO. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0037] Figure 1 It is a structural schematic diagram of an embodiment of a burner of the present invention;

[0038] Figure 2 It is a schematic diagram of the structure of the control component, the fire bar component and the gas injection component in the embodiment of the present invention;

[0039] Figure 3 It is a structural schematic diagram of a fire grate assembly and a gas injection assembly in an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of a flow chart of an embodiment of a control method for a gas water heater of the present invention;

[0041] Figure 5 It is a flow chart of another embodiment of the control method of the gas water heater of the present invention.

[0042] Description of Figure Numbers:

[0043]

[0044]

[0045] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] The present invention provides a burner, which is applicable to gas water heaters and related products and equipment including gas wall-mounted boilers that use gas combustion to generate high-temperature hot water for family bathing and heating, etc., aiming to effectively reduce the emission of pollutants (CO and NOx). For ease of understanding, the following application to gas water heaters is taken as an example.

[0050] In the embodiment of the present invention, Figures 1 to 3 As shown, the burner includes a housing 100, a preheating burner, a gas injection assembly 300 and a control assembly.

[0051] The housing 100 includes a first combustion chamber 110 and a second combustion chamber 120 which are connected in sequence.

[0052] The preheating burner is disposed in the housing 100 and is used to spray fire in the first combustion chamber 110 to generate preheating combustion, and to transport the smoke generated by the combustion to the second combustion chamber 120;

[0053] The gas injection assembly 300 includes a plurality of gas injection ports 301 connected to the second combustion chamber 120, and the plurality of gas injection ports 301 are used to inject gas into the second combustion chamber 120 to generate a high-temperature air combustion reaction in the second combustion chamber 120;

[0054] The control component is used to control the opening or closing of the gas injection port 301 .

[0055] A first combustion chamber 110 and a second combustion chamber 120 are formed in the shell 100, which are connected in sequence. The preheating burner can perform preheating combustion in the first combustion chamber 110, heat the first combustion chamber 110 to the target temperature, and transport the high-temperature flue gas generated by the combustion to the second combustion chamber 120. At this time, the gas is sprayed toward the second combustion chamber 120 through the gas injection port 301 of the gas injection assembly 300, which can entrain the high-temperature flue gas transported from the first combustion chamber 110, and the gas is preheated while diluting the gas and air to produce a high-temperature air combustion (MILD combustion) reaction, so that the second combustion chamber 120 is in a high-temperature and low-oxygen environment, the temperature of the gas and air is higher than its auto-ignition temperature, and the maximum temperature rise during the combustion process is lower than its auto-ignition temperature, and the oxygen volume fraction is diluted to an extremely low concentration by the combustion products. Compared with conventional combustion, in this combustion state, the pyrolysis of the fuel is suppressed, the flame thickness becomes thicker, and the flame front disappears, so that the temperature in the entire second combustion chamber 120 is very uniform, the combustion peak temperature is low, the noise is extremely small, and the pollutant NOx and CO emissions are greatly reduced.

[0056] However, in actual application, when the burner is applied to a gas water heater, since the combustion load requirements of the gas water heater in winter, summer, spring and autumn are different, the load requirements of the burner are also different. According to different load requirements, the preheating combustion effect of the preheating burner on the first combustion chamber 110 may also be different, and the capacity and position of the high-temperature flue gas delivered to the second combustion chamber 120 may also change accordingly. On this basis, some areas may not be able to meet the conditions for the high-temperature air combustion reaction. Based on this, the gas injection assembly 300 in this embodiment includes a plurality of gas injection ports 301 connected to the second combustion chamber 120, each gas injection port 301 can spray gas toward the second combustion chamber 120, and the opening or closing of the plurality of gas injection ports 301 is controlled by the control assembly to realize the adjustment of the position, injection intensity, gas size, injection speed, etc. of the gas injection assembly 300 into the second combustion chamber 120 to adapt to different heat load requirements, and ensure that the gas injected into the second combustion chamber 120 can participate in the high-temperature air combustion reaction, so as to achieve full combustion and reduce the emission of pollutants such as NOx and CO.

[0057] It can be understood that the specific state of the control component controlling the opening or closing of the gas injection port 301 needs to be determined according to the actual situation. For example, in winter, the heat load demand of the gas water heater is large or full load demand. At this time, all the preheating burners are turned on, and the entire area of ​​the first combustion chamber 110 is preheated and burned. That is, the first combustion chamber 110 can transport high-temperature flue gas to the second combustion chamber 120 in multiple directions. Based on this, the control component can control the opening of multiple gas injection ports 301 of the gas injection component 300, so that the gas injected into the second combustion chamber 120 can draw in the high-temperature flue gas, so that each area inside the second combustion chamber 120 can produce a high-temperature air reaction. In summer, the heat load demand of the gas water heater is relatively small. At this time, the preheating burner is partially opened, and part of the area inside the first combustion chamber 110 will be preheated and burned. The first combustion chamber 110 can only transport high-temperature flue gas to part of the area inside the second combustion chamber 120. At this time, in order to ensure that the gas injected into the second combustion chamber 120 can produce a high-temperature air reaction, the control component can only control the gas injection port 301 corresponding to the high-temperature flue gas position to be opened, and control the gas injection port 301 without the high-temperature flue gas position to be closed, so as to prevent the gas injected from the gas injection port 301 without the high-temperature flue gas position from failing to achieve the preheating effect and failing to produce a high-temperature air reaction. Similarly, in spring and autumn, the heat load of the gas water heater can be determined according to the actual situation. The preheating burner can be partially opened or fully opened. Correspondingly, the control component can control the corresponding part of the gas injection port 301 to be opened or all of the gas injection ports 301 to be opened, so as to ensure that the injected gas can produce a high-temperature air combustion reaction.

[0058] It should be noted that the control component controls the opening or closing of the gas injection port 301 in a manner not limited to the above-mentioned several situations, and may also be based on controlling the gas injection intensity at the gas injection port 301, the diameter of the gas injection port 301, etc. The position of opening or closing the gas injection port 301 is also determined according to actual conditions, such as a plurality of continuous gas injection ports 301 as a group, opening one or more groups, etc.; multiple gas injection ports 301 may be opened or closed at intervals; or the gas injection ports 301 may be opened or closed irregularly, etc. The specific opening positions are not listed one by one.

[0059] Optionally, the specific structural form of the preheating burner is not limited, such as a fire row burner, an induced draft burner, a full premixed burner or a semi-premixed burner, etc.

[0060] In this embodiment, the heat obtained after the high-temperature air combustion reaction in the second combustion chamber 120 can be exchanged with the heat exchanger in the gas water heater to achieve the function of producing hot water.

[0061] In the burner of the embodiment of the present invention, a first combustion chamber 110 and a second combustion chamber 120 connected in sequence are formed in the shell 100. A preheating burner is arranged in the shell 100 to spray fire in the first combustion chamber 110 to generate preheating combustion, and to transport the smoke generated by the combustion to the second combustion chamber 120. At the same time, the gas injection assembly 300 includes a plurality of gas injection ports 301 connected to the second combustion chamber 120, which are used to inject gas into the second combustion chamber 120, so as to achieve the effect of entraining high-temperature smoke to preheat the gas and air, thereby generating a high-temperature air combustion reaction in the second combustion chamber 120. At the same time, in this embodiment, the opening or closing of the gas injection port 301 is controlled by the control assembly, 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 as to ensure that the gas ejected from the gas injection port 301 can participate in the high-temperature air combustion reaction, increase the gas utilization rate, achieve full combustion, and reduce the emission of pollutants such as NOx and CO.

[0062] In one embodiment of the present invention, referring to Figures 1 to 3 The preheating burner is a fire bar assembly 200, and the fire bar assembly 200 includes a plurality of fire bar monomers 201 arranged side by side; the control assembly is also used to control the opening or closing of the fire bar monomers 201.

[0063] It can be understood that when the preheating burner is a fire grate assembly 200, fuel gas is introduced into the fire grate unit 201 to induce air, a mixed gas is formed in the pipe inside the fire grate unit 201, and is ejected from the flame outlet of the fire grate unit 201 toward the first combustion chamber 110, and the ejected mixed gas is ignited by the igniter to form a flame, thereby realizing the function of ejecting flame from the flame outlet of the fire grate unit 201.

[0064] In the present embodiment, a plurality of fire grate units 201 arranged side by side form a fire grate assembly 200, and the opening or closing of each fire grate unit 201 can be controlled by a control assembly. In actual application, the gas water heater will have different heat load requirements in different seasons. According to different heat load requirements, all or part of the fire grate units 201 can be opened, wherein the opened fire grate units 201 will spray flames toward the first combustion chamber 110, and burn at their corresponding positions to produce high-temperature flue gas.

[0065] In actual application, for example, in winter, when the heat load demand of the gas water heater is high or full, the control component can control all the fire bar units 201 to be opened. At this time, the flame outlets of the entire fire bar assembly 200 will spray flames toward the first combustion chamber 110, and high-temperature flue gas will be generated above the corresponding entire fire bar assembly 200, so that high-temperature flue gas will be transported to the corresponding position inside the second combustion chamber 120. At this time, the control component can be used to control most or all of the gas injection ports 301 of the gas injection assembly 300 to be opened to spray gas toward the second combustion chamber 120, so as to achieve the effect of preheating and entraining the high-temperature flue gas, thereby generating high-temperature air combustion. In summer, the heat load demand of the gas water heater is relatively small, and the control component can control some of the multiple fire grate monomers 201 to be opened and some to be closed. At this time, only the opened fire grate monomers 201 will spray flames toward the first combustion chamber 110, while the unopened fire grate monomers 201 will not spray flames. Accordingly, the high-temperature flue gas transported to the second combustion chamber 120 may only exist in some areas. At this time, the control component can be used to control the gas injection port 301 corresponding to the unopened fire grate monomer 201 to be closed to prevent gas from being sprayed toward areas without high-temperature flue gas, and only spray gas toward areas with high-temperature flue gas to ensure that the sprayed gas can participate in the high-temperature air combustion.

[0066] Specifically, a plurality of the gas injection ports 301 are arranged side by side on the side wall of the housing 100 , and one gas injection port 301 is arranged corresponding to one fire bar unit 201 ;

[0067] The control component is also used to control the gas injection port 301 corresponding to the opened position of the fire bar monomer 201 to open, and / or control the gas injection port 301 corresponding to the unopened position of the fire bar monomer 201 to close.

[0068] It can be understood that the second combustion chamber 120 is a chamber formed inside the shell 100, and the gas injection port 301 is provided on the side wall of the shell 100, for injecting gas toward the second combustion chamber 120. A plurality of gas injection ports 301 are arranged side by side on the side wall of the shell 100, and are consistent with the arrangement of a plurality of fire bar monomers 201, wherein one gas injection port 301 is provided corresponding to one fire bar monomer 201, so that the high-temperature flue gas generated by the flame ejected from the fire bar monomer 210 can be smoothly transported to the gas injection path of the corresponding gas injection port 301, so as to preheat the gas ejected from the corresponding gas injection port 301.

[0069] On the basis of the above-mentioned embodiments, when the heat load demand of the gas water heater is different, the opening state of the fire bar monomer 201 and the opening state of the gas injection port 301 are different. When the heat load demand is large, the control component controls all the fire bar monomers 201 to be opened, and accordingly, the control component can control most or all of the gas injection ports 301 to be opened to achieve a high-temperature combustion reaction. When the heat load demand is small, the control component controls some of the fire bar monomers 201 to be opened, and some of the fire bar monomers will be closed. At this time, in order to ensure that the ejected gas can participate in the high-temperature air reaction, the control component can control the gas injection ports 301 corresponding to the positions of the unopened fire bar monomers 201 to be closed, and at the same time control the gas injection ports 301 corresponding to the positions of the opened fire bar monomers 201 to be fully or partially opened, thereby ensuring that the ejected gas can participate in the high-temperature air combustion.

[0070] It should be noted that the opening or closing position of the multiple fire bar monomers 201 in the fire bar assembly 200 can be determined according to the actual situation, such as partially continuous fire bar monomers 201 can be opened or closed at the same time, or the interval fire bar monomers 201 can be opened or closed, or one of two adjacent fire bar monomers 201 is opened and the other is closed, etc. Correspondingly, the opening or closing position of the gas injection port 301 is determined according to the opening or closing position of the fire bar monomer 201.

[0071] In one embodiment of the present invention, referring to Figures 1 to 3 The gas injection assembly 300 also includes a high-temperature gas pipe and a high-temperature gas distribution rod 330. The high-temperature gas pipe is used to connect external gas. The high-temperature gas distribution rod 330 connects the high-temperature gas pipe with the multiple gas injection ports 301; the control assembly includes a high-temperature segmented valve 410 that is controllably connected to the high-temperature gas distribution rod 330.

[0072] In this embodiment, the high-temperature gas pipe is connected to the multiple gas injection ports 301 through the high-temperature gas distribution rod 330 to realize the function of delivering the gas in the high-temperature gas pipe to the multiple gas injection ports 301. The control component includes a high-temperature segmented valve 410, which is controlled and connected to the high-temperature gas distribution rod 330 to realize the control function of opening and closing each gas injection port 301. Optionally, the high-temperature segmented valve 410 can be arranged inside the high-temperature gas distribution rod 330, so as to set a valve in the branch connected to each gas injection port 301, and open or close different valves to achieve the purpose of opening or closing different gas injection ports 301.

[0073] In one embodiment of the present invention, the fire grate assembly 200 also includes a fire grate gas distribution rod 230 connected to multiple fire grate units 201, and the fire grate gas distribution rod 230 is externally connected to a fire grate gas pipe; the control assembly also includes a fire grate section valve 420 that is controllably connected to the fire grate gas distribution rod 230.

[0074] In this embodiment, the multiple fire grate units 201 of the fire grate assembly 200 are all connected to the fire grate gas distribution rod 230 to realize the function of inputting gas to the fire grate units 201. The control component includes a fire grate section valve 420, which is control-connected to the fire grate gas distribution rod 230 to realize the opening or closing function of introducing the gas passage to each fire grate unit 201, thereby realizing the opening or closing function of each fire grate unit 201. Optionally, the fire grate section valve 420 can be arranged inside the fire grate gas distribution rod 230, so as to set a valve in the branch connected to each fire grate unit 201, and open or close different valves to achieve the purpose of opening or closing different fire grate units 201.

[0075] In one embodiment, referring to Figures 1 to 3 , the plurality of fire row monomers 201 are divided into a first fire row monomer group 210 and a second fire row monomer 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 monomer group 210, and the second gas injection port group 320 corresponds to the second fire row monomer group 220;

[0076] The fire grate section valve 420 is used to control the opening or closing of the first fire grate monomer group 210, and the high-temperature section valve 410 is used to control the opening or closing of the first gas injection port group 310; and / or, the fire grate section valve 420 is used to control the opening or closing of the second fire grate monomer group 220, and the high-temperature section valve 410 is used to control the opening or closing of the second gas injection port group 320.

[0077] In this embodiment, the multiple fire bar monomers 201 of the fire bar assembly 200 are divided into a first fire bar monomer group 210 and a second fire bar monomer group 220, and the multiple gas injection ports 301 of the gas injection assembly 300 are divided into a first gas injection port group 310 and a second gas injection port group 320. The fire bar segmentation valve 420 in the control assembly can control at least one of the first fire bar monomer group 210 and the second fire bar monomer group 220 to be opened, and the high temperature segmentation valve 410 in the control assembly can control at least one of the first gas injection port group 310 and the second gas injection port group 320 to be opened.

[0078] Optionally, when the fire bar section valve 420 controls the first fire bar monomer group 210 to open and the second fire bar monomer group 220 to close, accordingly, in order to ensure that the gas ejected from the gas injection port 310 can participate in the high-temperature air combustion reaction, the high-temperature section valve 410 controls the first gas injection port group 310 to open and the second gas injection port group 320 to close.

[0079] Optionally, when the fire grate segmentation valve 420 controls the first fire grate monomer group 210 to close and the second fire grate monomer group 220 to open, accordingly, in order to ensure that the gas ejected from the gas injection port 310 can participate in the high-temperature air combustion reaction, the high-temperature segmentation valve 410 controls the first gas injection port group 310 to close and the second gas injection port group 320 to open.

[0080] Optionally, when the fire bar sectional valve 420 controls both the first fire bar monomer group 210 and the second fire bar monomer group 220 to be opened, the high temperature sectional valve 410 controls both the first gas injection port group 310 and the second gas injection port group 320 to be opened.

[0081] In one embodiment of the present invention, the fire bar assembly 200 also includes an igniter, which is arranged at the top of the fire bar assembly 200; the fire bar section valve 420 is used to control the opening of a group of the first fire bar monomer group 210 and the second fire bar monomer group 220 close to the igniter, and control the closing of a group away from the igniter.

[0082] In this embodiment, when the heat load of the gas water heater is small, a group of fire grate monomers close to the igniter can be controlled to open through the fire grate section valve 420 to ensure that the mixed gas ejected from the fire grate monomer 201 can be ignited and fully burned, thereby preventing the mixed gas ejected from the fire grate monomer 201 from being too far away from the igniter and unable to be ignited.

[0083] For example, take a 16L gas water heater as an example. Figure 3Assuming that the total load is 28KW, the number of fire bar monomers 201 is 8, and the number of gas injection ports 301 is 16 (8 are arranged on opposite sides of the shell 100), that is, the 8 gas injection ports 301 located on the same side are distributed correspondingly to the 8 fire bar monomers 201, the heat load ratio of the fire bar section and the high-temperature combustion section is 1:1, and the load adjustment range of each fire bar monomer 201 is 1KW~2KW. When the load of the whole machine is less than 12KW, the load of the fire grate section is less than 6KW. The fire grate section valve 420 controls the 5 fire grate monomers 201 far from the igniter to close, and controls the 3 fire grate monomers 201 close to the igniter to work. Correspondingly, the high-temperature section valve 410 controls the 10 gas injection ports 301 (5 on each side of the shell 100) corresponding to the 5 closed fire grate monomers 201 to close, and controls the 6 gas injection ports 301 (3 on each side of the shell 100) corresponding to the 3 working fire grate monomers 201 to open. In this way, it can be ensured that the gas ejected from the gas injection ports 301 can be fully preheated by the high-temperature flue gas to achieve a high-temperature air combustion state.

[0084] In one embodiment of the present invention, referring to Figures 1 to 3 , the burner further comprises a gas supply pipe, the gas supply pipe comprises a gas main pipe, a first gas branch pipe 510 and a second gas branch pipe 520;

[0085] The gas main pipe is used to connect to an external gas source; the first gas branch pipe 510 connects the gas main pipe with the preheating burner; the second gas branch pipe 520 connects the gas main pipe with the gas injection assembly 300;

[0086] 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 .

[0087] It can be understood that when the preheating burner is a 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. A first gas valve 501 is provided on the first gas branch pipe 510, and a second gas valve 502 is provided on the second gas branch pipe 520, so that the first gas branch pipe 510 and the second gas branch pipe 520 can be controlled independently of each other. Optionally, the first gas valve 501 and the second gas valve 502 can be solenoid valves and gas proportional valves, so as to adjust the gas proportion distribution in the first gas branch 510 and the second gas branch 520 according to the load requirements in different combustion chambers to ensure the load required for combustion.

[0088] To ensure the air supply for combustion, refer to Figures 1 to 3In one embodiment of the present invention, the shell 100 also includes an installation chamber 130 for installing the fire bar assembly 200, the installation chamber 130 is connected to the first combustion chamber 110, and the installation chamber 130 is provided with an air inlet 131; the burner also includes a fan 600, and the air outlet side of the fan 600 is connected to the air inlet 131.

[0089] It can be understood that the installation chamber 130 is equivalent to an air chamber, and the fan 600 delivers air toward the installation chamber 130 through the air inlet 131, so that the fire bar assembly 200 can draw the air in the installation chamber 130, that is, realize the air supply function for the combustion of the fire bar assembly 200. At the same time, the installation chamber 130 is connected to the first combustion chamber 110 to realize the secondary air replenishment function when the fire bar assembly 200 burns at the flame mouth. Further, the air for the high-temperature air combustion in the second combustion chamber 120 can also be provided by the air in the installation chamber 130. Optionally, an air gap is formed between two adjacent fire bar monomers 201, so that air can enter the second combustion chamber 120 from the air gap to provide air for the high-temperature air combustion.

[0090] The present invention also provides a gas water heater, referring to Figure 1 The gas water heater includes a heat exchanger 700 and a burner. The specific structure of the burner is referred to the above embodiment. Since the gas water heater adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The heat exchanger 700 is connected to the second combustion chamber 120 of the burner to produce hot water through the heat generated by the second combustion chamber 120.

[0091] 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 the tap water pipe to connect cold water for heat exchange. The water outlet is used to connect the faucet and shower of the user's home through a pipeline. Generally, a cold water joint and a hot joint are provided to facilitate connection. In this embodiment, the heat exchanger 700 can be a heat exchange pipeline provided on the side wall of the housing 100 corresponding to the position of the second combustion chamber 120 to exchange heat with the second combustion chamber 120 to convert the input cold water into hot water. In other embodiments, it can also be a water-cooled wall, which is not limited here.

[0092] In order to reduce the pollutant emission of the gas water heater, in one embodiment of the present invention, the control component in the burner is used to obtain the required load of the gas water heater; according to the required load of the gas water heater, some of the fire bar units 201 in the fire bar assembly 200 are controlled to be closed; according to the unopened fire bar units 201, the gas injection port 301 corresponding to the position of the unopened fire bar units 201 is controlled to be closed.

[0093] The control component in the burner is also used to control the fire bar unit 201 in the fire bar assembly 200 to open according to the required load of the gas water heater; and to control the gas injection port 301 corresponding to the position of the opened fire bar unit 201 to open according to the opened fire bar unit 201.

[0094] It is understandable that when the heat load demand of the gas water heater is different, the opening state of the fire bar monomer 201 and the opening state of the gas injection port 301 are different. When the heat load demand is large, the control component controls all the fire bar monomers 201 to be opened, and accordingly, the control component can control most or all of the gas injection ports 301 to be opened to achieve a high-temperature combustion reaction. When the heat load demand is small, the control component controls some of the fire bar monomers 201 to be opened, and some of the fire bar monomers will be closed. At this time, in order to ensure that the ejected gas can participate in the high-temperature air reaction, the control component can control the gas injection ports 301 corresponding to the positions of the unopened fire bar monomers 201 to be closed, and at the same time control the gas injection ports 301 corresponding to the positions of the opened fire bar monomers 201 to be fully or partially opened, thereby ensuring that the ejected gas can participate in the high-temperature air combustion, so as to achieve full combustion and reduce the emission of pollutants such as NOx and CO.

[0095] To achieve the above object, the present invention also provides a control method for a gas water heater, referring to Figures 1 to 5 Based on the above-mentioned gas water heater, the specific structure of the gas water heater refers to the above-mentioned embodiment, which will not be described in detail here. The control method of the gas water heater includes:

[0096] S10, obtaining the load required by the gas water heater;

[0097] S20, controlling some of the fire bar units 201 in the fire bar assembly 200 to be closed according to the required load of the gas water heater;

[0098] S30, according to the unopened fire bar monomer 201, controlling the gas injection port 301 corresponding to the position of the unopened fire bar monomer 201 to be closed.

[0099] It is understandable that the heat load demand of the gas water heater may change according to the season, outdoor temperature and weather. Therefore, when the heat load demand of the gas water heater changes, the state of the fire bar assembly 200 and the gas injection assembly 300 in the corresponding burner will also change to ensure the high-temperature air combustion reaction.

[0100] In this embodiment, when the heat load demand of the gas water heater is different, the opening state of the fire bar monomer 201 and the opening state of the gas injection port 301 are different. When the heat load demand is small, the control component controls part of the fire bar monomer 201 to be opened, and part of the fire bar monomer 201 to be closed. At this time, in order to ensure that the injected gas can participate in the high-temperature air reaction, the control component can control the gas injection port 301 corresponding to the position of the unopened fire bar monomer 201 to be closed, and at the same time control the gas injection port 301 corresponding to the position of the opened fire bar monomer 201 to be fully or partially opened, so as to ensure that the injected gas can participate in the high-temperature air combustion, so as to achieve full combustion and reduce the emission of pollutants such as NOx and CO. When the heat load demand is large, the control component controls all the fire bar monomers 201 to be opened, and accordingly, the control component can control most or all of the gas injection ports 301 to be opened to achieve a high-temperature combustion reaction.

[0101] Furthermore, the control method further includes:

[0102] S40, controlling the fire bar unit 201 in the fire bar assembly 200 to open according to the required load of the gas water heater;

[0103] S50, according to the opened fire bar monomer 201, control the gas injection port 301 corresponding to the position of the opened fire bar monomer 201 to open.

[0104] In this embodiment, in order to achieve a better effect of high-temperature air combustion in the second combustion chamber 120, when the fire grate unit 201 in the fire grate assembly 200 is controlled to be turned on according to the required load of the gas water heater, the gas injection ports 301 corresponding to the positions of the opened fire grate units 201 are controlled to be opened to ensure the gas injection capacity and the gas injection range, so that sufficient gas injection can entrain the high-temperature flue gas, ensure the sufficiency of the reactants for the high-temperature air combustion, and ensure the heat generated by the high-temperature air combustion reaction.

[0105] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A burner, characterized in that: include: A housing, wherein a first combustion chamber and a second combustion chamber that are connected in sequence are formed in the housing; a preheating burner, disposed in the housing, for spraying fire in the first combustion chamber to produce preheating combustion, and conveying smoke generated by the combustion to the second combustion chamber; a gas injection assembly, the gas injection assembly comprising a plurality of gas injection ports in communication with the second combustion chamber, the plurality of gas injection ports being used to inject gas into the second combustion chamber to generate a high-temperature air combustion reaction in the second combustion chamber; as well as A control component, used for controlling the opening or closing of the gas injection port; The preheating burner is a fire bar assembly, and the fire bar assembly includes a plurality of fire bar monomers; the control assembly is also used to control the opening or closing of the fire bar monomers; A plurality of gas injection ports are distributed on the side wall of the shell, and one gas injection port is arranged corresponding to one fire bar unit; The control component is also used to control the opening of the gas injection port corresponding to the opened fire grate unit position, and / or control the closing of the gas injection port corresponding to the unopened fire grate unit position.

2. The burner according to claim 1, characterized in that A plurality of fire bar units are arranged side by side.

3. The burner according to claim 2, characterized in that A plurality of the gas injection ports are distributed side by side on the side wall of the shell.

4. The burner according to claim 3, characterized in that The gas injection assembly further comprises a high-temperature gas pipe and a high-temperature gas distribution rod, wherein the high-temperature gas pipe is used to connect external gas, and the high-temperature gas distribution rod connects the high-temperature gas pipe with the plurality of gas injection ports; The control assembly includes a high-temperature sectional valve which is controllably connected to the high-temperature fuel gas distribution rod.

5. The burner according to claim 4, characterized in that The fire bar assembly further comprises a fire bar gas distribution rod connected to the plurality of fire bar monomers, and the fire bar gas distribution rod is externally connected to the fire bar gas pipe; The control assembly also includes a fire exhaust section valve which is controllably connected to the fire exhaust gas distribution rod.

6. The burner according to claim 5, characterized in that The plurality of fire row monomers are divided into a first fire row monomer group and a second fire row monomer group; the plurality of gas injection ports are divided into a first gas injection port group and a second gas injection port group, the first gas injection port group corresponds to the first fire row monomer group, and the second gas injection port group corresponds to the second fire row monomer group; The fire grate sectional valve is used to control the opening or closing of the first fire grate monomer group, and the high-temperature sectional valve is used to control the opening or closing of the first gas injection port group; and / or, the fire grate sectional valve is used to control the opening or closing of the second fire grate monomer group, and the high-temperature sectional valve is used to control the opening or closing of the second gas injection port group.

7. The burner according to claim 6, characterized in that The fire bar assembly also includes an igniter, which is arranged on the top of the fire bar assembly; the fire bar section valve is used to control the opening of a group of the first fire bar monomer group and the second fire bar monomer group close to the igniter, and control the closing of a group far from the igniter.

8. The burner according to any one of claims 1 to 7, characterized in that: The burner further comprises a gas supply pipe, wherein the gas supply pipe comprises: A gas main pipe, the gas main pipe is used to connect to an external gas source; a first gas branch pipe, the first gas branch pipe connecting the gas main pipe and the preheating burner; and a second gas branch pipe, the second gas branch pipe being connected with the gas main pipe and the gas injection assembly; The first gas branch pipe and the second gas branch pipe are both provided with a gas valve.

9. The burner according to any one of claims 2 to 7, characterized in that: The shell also includes an installation chamber for installing the fire bar assembly, the installation chamber is communicated with the first combustion chamber, and the installation chamber is provided with an air inlet; the burner also includes a fan, and the air outlet side of the fan is connected to the air inlet.

10. A gas water heater, characterized in that: It comprises a heat exchanger and the burner according to any one of claims 3 to 9, wherein the heat exchanger is connected to the second combustion chamber of the burner to produce hot water by the heat generated by the second combustion chamber.

11. The gas water heater according to claim 10, characterized in that: The control component is used to obtain the load required by the gas water heater; Controlling some of the fire bar units in the fire bar assembly to close according to the required load of the gas water heater; According to the unopened fire grate unit, the gas injection port corresponding to the position of the unopened fire grate unit is controlled to be closed.

12. The gas water heater according to claim 11, characterized in that: The control component is also used to control the opening of the fire bar unit in the fire bar component according to the required load of the gas water heater; According to the opened fire grate unit, the gas injection port corresponding to the position of the opened fire grate unit is controlled to open.

13. A control method for a gas water heater, used for the gas water heater according to any one of claims 10 to 12, characterized in that: The control method comprises: Obtain the load required by the gas water heater; Controlling some of the fire bar units in the fire bar assembly to close according to the required load of the gas water heater; According to the unopened fire grate unit, the gas injection port corresponding to the position of the unopened fire grate unit is controlled to be closed.

14. The control method of the gas water heater according to claim 13, characterized in that: The control method further comprises: Controlling the fire bar unit in the fire bar assembly to open according to the required load of the gas water heater; According to the opened fire grate unit, the gas injection port corresponding to the position of the opened fire grate unit is controlled to open.

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