WO2023274377A1 - Burner and gas water-heating device - Google Patents

Abstract

A burner and a gas water-heating device, the burner comprising: a burner body (100), the burner body (100) having a gas intake chamber (10), a first combustion chamber (20) and a second combustion chamber (30) that communicate in sequence; and a flow divider (200), which is arranged between the gas intake chamber (10) and the first combustion chamber (20), the flow divider (200) being used to divide a gas flow of the gas intake chamber (10) and deliver same to the first combustion chamber (20) and the second combustion chamber (30) separately. In high-temperature air combustion completed by means of the flow divider, gas, or air, or a mixture of gas and air is properly distributed to the two-stage combustion chambers, which reduces the emission of pollutants and reduces the noise of the gas water-heating device.

Description

Burner and gas hot water equipment

This application requires June 30, 2021, the application number is 202110754576.7, 202121505970.9, the application name is "burner and gas hot water equipment", and, on June 22, 2022, the application number is 202221580424.6, the application name is "burner and gas hot water equipment", the entire text of which is hereby incorporated by reference.

technical field

The present application relates to the technical field of gas-fired water heating equipment, in particular to a burner and gas-fired water heating equipment.

Background technique

High temperature air combustion (high temperature air combustion) is called "mild and deep hypoxic dilution combustion", referred to as soft combustion, which is a new type of combustion, also known as MILD combustion. The main characteristics of this combustion are: the chemical reaction mainly occurs in a high-temperature and low-oxygen environment, the temperature of the reactants is higher than its natural temperature, and the maximum temperature rise during the combustion process is lower than its natural temperature, and the oxygen volume fraction is extremely diluted by the combustion products. low concentration. Compared with conventional combustion, in this combustion state, the pyrolysis of fuel is suppressed, the flame thickness becomes thicker, and the flame front disappears, so that the temperature of the entire furnace is very uniform during this combustion, and pollutants NOx and CO are emitted significantly reduced.

Although high-temperature air combustion has the above-mentioned many advantages, at present, there is no professional burner to realize the above-mentioned high-temperature air combustion.

The above content is only used to assist in understanding the technical solution of the application, and does not mean acknowledging that the above content is the prior art.

application content

The main purpose of this application is to propose a burner and gas-fired water heating equipment, aiming at reducing the emission of pollutants (CO and NOx) and reducing the noise of the gas-fired water heating equipment.

In order to achieve the above object, the application proposes a burner, which includes:

a combustion body having an intake chamber, a first combustion chamber, and a second combustion chamber communicated in sequence; and

A splitter, arranged between the intake chamber and the first combustion chamber, the splitter is used to divide the airflow in the intake chamber and flow it to the first combustion chamber and the second combustion chamber respectively. room delivery.

Optionally, the combustion body includes:

a combustion casing forming the first and second combustion chambers; and

an air intake casing, the air intake casing is covered on one side of the combustion casing, and is enclosed with the combustion casing to form the air intake cavity;

The combustion casing is provided with a first air inlet connecting the air inlet chamber with the first combustion chamber and a second air inlet connecting the air inlet chamber with the second combustion chamber.

Optionally, the flow divider is arranged in a plate shape, and the flow divider arranged in a plate shape is arranged close to the first air inlet and the second air inlet of the combustion casing.

Optionally, the flow divider is bonded to the combustion casing.

Optionally, the combustion casing includes a fixed plate, and the flow divider is bonded to the fixed plate.

Optionally, the side of the flow divider is arranged close to the inner side wall of the intake housing.

Optionally, the flow divider is fixed to the combustion casing;

Alternatively, the splitter is fixed to the intake casing.

Optionally, the splitter is provided with a plurality of air holes, a part of the plurality of air holes corresponds to the first air inlet, and another part of the plurality of air holes corresponds to the second air inlet. ;

The apertures of the air holes corresponding to the first air inlet are different from the apertures of the air holes corresponding to the second air inlet.

Optionally, the shunt includes:

A baffle plate between the air intake chamber and the first combustion chamber, a plurality of air holes are arranged on the baffle plate to form the air intake chamber for the gas to flow into the first combustion chamber first stream;

A second flow path for the gas in the intake cavity to flow into the second combustion chamber is formed between the side of the baffle and the wall of the intake cavity.

Optionally, one or more side plates are surrounded by one side of the baffle plate facing the direction of the air inlet cavity, so as to disturb the airflow of the second flow path.

Optionally, the combustion casing includes:

A frame body part, the frame body part includes a first end cover, a second end cover, and a peripheral side plate connecting the first end cover and the second end cover, the peripheral side plate and the first end cover The end cover and the second end cover surround and form a combustion chamber;

The frame part has a first side and a second side opposite to each other along the combustion direction, and the first combustion chamber and the second combustion chamber are correspondingly arranged in sequence from the first side to the second side.

Optionally, the combustion casing also includes

A fixed plate, the fixed plate cover is arranged on the first side of the frame part, and a first air inlet is provided on the fixed plate at a position corresponding to the first combustion chamber;

The fixing plate protrudes toward the first combustion chamber to form a mounting portion corresponding to the periphery of the first air inlet, for fixing and installing the preheating burner.

Optionally, the preheating burner includes:

A spoiler, the spoiler is arranged between the flow divider and the first combustion chamber, so as to disturb the gas flowing into the first combustion chamber;

a porous media burner, the porous media burner is arranged between the spoiler and the first combustion chamber, and is used to ignite the mixed gas and transport it to the combustion chamber of the burner, and burn the The chamber is preheated to the target temperature.

Optionally, the spoiler is a porous spoiler, and the porous spoiler is provided with a plurality of spoiler flow holes, and the apertures of the plurality of spoiler flow holes are smaller than the air holes of the flow divider.

Optionally, a gas connector is provided on the outside of the peripheral side plate, the second air inlet is provided on the fixed plate corresponding to the position of the gas connector, and the gas connector communicates with the intake cavity and the second combustion chamber.

Optionally, at least one first water cavity is formed in the first end cover, at least one second water cavity is formed in the second end cover, and the first water cavity and the second water cavity are connected through at least one The heat-absorbing pipes communicate with each other to form a circulation waterway.

Optionally, the number of the peripheral side plates is two, and the two peripheral side plates are arranged opposite to each other;

The two peripheral side plates are respectively provided with connection pieces communicating with the gas.

Optionally, a plurality of gas injection holes are provided at one end of the gas connecting member close to the second combustion chamber for injecting gas into the second combustion chamber.

Optionally, a gap is formed between the splitter and the fixing plate, and the gap is a flow path for the gas in the intake chamber of the second flow path to flow into the first combustion chamber.

The application also proposes a gas hot water device, including:

A main body, the main body is provided with a heat exchange chamber and a smoke exhaust port communicating with the heat exchange chamber;

a heat exchanger located in the heat exchange chamber;

The above-mentioned burner is installed on the main body, and the flue gas outlet of the burner communicates with the heat exchange chamber; and

Inlet and outlet pipes connected to the heat exchanger.

Optionally, the heat exchanger communicates with at least one heat absorption pipe of the burner.

Optionally, the gas hot water equipment further includes a pre-mixer installed on the main body and above the burner, the pre-mixer is used to pre-mix the gas and air inserted into it, and The intake chamber of the burner delivers the mixed gas to the first combustion chamber and the second combustion chamber of the burner.

Optionally, the gas hot water equipment also includes:

a smoke exhaust assembly, the smoke exhaust assembly communicates with the heat exchange chamber;

And/or, the condensate water assembly, the smoke exhaust assembly is provided in communication with the heat exchange chamber.

Optionally, the gas hot water equipment further includes a connecting pipe, the heat exchanger has a water inlet and a water outlet, and the connecting pipe connects the water outlet and the water inlet joint of the burner.

In this embodiment, a flow splitter is set so that under the flow splitting action of the flow splitter, the gas output from the intake chamber is divided into at least two gas flow paths for output, so that a part of the gas and/or air is injected into the first combustion chamber, and in the first combustion chamber The high-temperature flue gas is formed after combustion in the first combustion chamber, and another part of gas and/or air is injected into the second combustion chamber. The high-temperature flue gas formed by combustion in the first combustion chamber is entrained by the high-speed gas and air injected into the second combustion chamber, thereby The gas and/or air injected into the second combustion chamber is preheated, and high-temperature air combustion is finally realized, reducing CO and NOx emissions from gas-fired hot water equipment. In this application, the gas or air, or the mixture of gas and air is properly distributed to the two-stage combustion chamber through the splitter to complete the high-temperature air combustion, so that there is no need to add additional solenoid valves to control the air distribution of the two-stage combustion chamber, which can The control on air distribution is effectively reduced, and at the same time, the flow divider has a simple structure, is easy to implement, and can be widely applied to combustion gas hot water equipment with two-stage combustion chambers, and is also conducive to reducing the cost of gas hot water equipment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative effort.

Fig. 1 is the structural representation of an embodiment of the burner of the present application;

Fig. 2 is a schematic diagram of a partially exploded structure of the burner in Fig. 1;

Fig. 3 is a schematic diagram of a partial exploded structure of the frame part in Fig. 1;

Fig. 4 is the structural representation of another embodiment of the burner of the present application;

Fig. 5 is a schematic diagram of the gas flow of an embodiment of the burner of the present application;

Fig. 6 is a schematic structural view of an embodiment of the gas hot water equipment provided by the present application;

Fig. 7 is a schematic longitudinal sectional view of part A-A of the gas water heater in Fig. 6;

Fig. 8 is an internal detailed view of the gas hot water equipment in Fig. 6;

Fig. 9 is a schematic structural view of another embodiment of the burner of the present application;

Fig. 10 is a schematic diagram of a partially exploded structure of the burner in Fig. 9;

Fig. 11 is a partial enlarged structural schematic diagram of the burner in Fig. 9;

Fig. 12 is a schematic diagram of gas flow in an embodiment of the burner of the present application.

Explanation of reference numbers:

label	name	label		name
100	burning body	111a	first water cavity
110	combustion shell	111b	Second water cavity
120	Intake housing	150	Inlet connector
111	Frame	160	Outlet connector
121	fixed plate	200	shunt
1111	first end cap	211	baffle
1112	second end cap	212	side panels
1113	Peripheral side panels	211a	Stomata
1114	gas connection	300	spoiler
1114a	air intake hole	400	porous media
1114b		gas hole	500	heat sink
10	Intake cavity	600	Heat Exchanger
20	first combustion chamber	700	premixer
30	second combustion chamber	800	Smoke exhaust components
40	heat exchange chamber	900	Condensate components

The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

This application proposes a burner, which is suitable for gas hot water equipment and related products and equipment including gas wall-hung boilers that use gas combustion to generate high-temperature hot water for family bathing and heating. Take water equipment as an example.

Referring to Figures 1 to 5, in an embodiment of the present application, the burner includes:

a combustion body 100, the combustion body 100 has an intake chamber 10, a first combustion chamber 20 and a second combustion chamber 30 connected in sequence; and

The flow divider 200 is arranged between the air intake chamber 10 and the first combustion chamber 20, the flow divider 200 is used to split the air flow in the air intake chamber 10, and flow them to the first combustion chamber respectively. 20 and the second combustion chamber 30 delivery.

It can be understood that the main characteristics of high-temperature air combustion are: the chemical reaction needs to occur in a high-temperature and low-oxygen environment, the temperature of the reactants is higher than its auto-ignition temperature, and the maximum temperature rise during the combustion process is lower than its auto-ignition temperature, the oxygen volume fraction Diluted to very low concentrations by combustion products. Compared with conventional combustion, in this combustion state, the pyrolysis of fuel is inhibited, the flame thickness becomes thicker, and the flame front disappears, so that the temperature in the entire furnace is very uniform, the combustion peak temperature is low and the noise is extremely small, and Pollutant NOx and CO emissions are greatly reduced. However, certain conditions are required to achieve high-temperature air combustion: it is necessary to ensure that the oxygen concentration in most areas of the furnace is lower than a certain value, generally lower than 5% to 10%, to ensure that the gas is fully decomposed and burns evenly, and the temperature must be Sustains spontaneous combustion above the self-ignition point of the fuel. In addition, the following conditions must be met. High-temperature preheating air combined with high-speed jets is the main way to achieve high-temperature air combustion; entraining high-temperature flue gas and diluting the combustion air jet is the technical key to maintaining high-temperature air combustion.

The combustion body 100 includes a shell, which is formed with an air intake chamber 10, a first combustion chamber 20, and a second combustion chamber 30 in sequence. In this embodiment, the shape of the combustion body 100 shell can be square, cylindrical, etc. It can be selected and designed according to actual needs, and no specific limitation is made here.

There is also a smoke exhaust port on the shell. When the gas burns at high temperature in the second combustion chamber 30, the heat after combustion is discharged through the smoke exhaust port, and then it can exchange heat with the heat exchanger of the gas water heating equipment to Realize making hot water.

Based on the direction of flue gas flow, the second combustion chamber 30 can be selectively located in the upper half or the lower half of the entire burner 100, which is more conducive to the discharge of flue gas. Below, the side of the heat exchanger 600 away from the second combustion chamber is also provided with a smoke collection hood 820, and a smoke exhaust pipe 810 communicating with the smoke collection hood 810. The smoke inlet of the smoke exhaust pipe 810 communicates with the smoke collection hood 820, The smoke outlet of the smoke exhaust pipe 810 is arranged above the burner, and the smoke is discharged through the smoke collecting hood 820 and the smoke exhaust pipe 810 after heat exchange in the heat exchange chamber 40 .

The gas water heating equipment also includes a preheating burner, which is installed in the first combustion chamber 20; a heat exchanger, which is located between the smoke exhaust port and the second combustion chamber 30; In the gas water heating equipment, the water inlet pipe for introducing water, the hot water outlet pipe for providing hot water to the outside, the smoke exhaust pipe connected to the smoke exhaust port, the gas inlet pipeline and the inlet valve for connecting the gas.

Among them, the preheating burner is used to heat the gas in the MILD combustion chamber. The preheating burner can adopt a honeycomb structure that can effectively prevent flashback during the combustion process. For example, the gas hot water equipment also includes an igniter, which is used to ignite the gas injected from the preheating burner. In the embodiment of the present application, the igniter is arranged on the combustion shell of the burner, and the gas water heating equipment also includes an electric control component, which is used to control the combustion work of the preheating burner when the gas water heating equipment is started, and enters the first The gas and air in the first combustion chamber 20 are ignited and ignited by the preheating burner, so that the mixed gas mixed with gas and air is combusted to heat the air in the first combustion chamber 20 to form high-temperature flue gas.

It can be understood that, by controlling the heating temperature, the air in the first combustion chamber 20 can be heated to the target temperature, that is, the above-mentioned preset temperature, so that high-temperature preheating of the air is realized. After the high-temperature preheated high-temperature gas is sent into the second combustion chamber 30, it is mixed through the specific structure of the second combustion chamber, the gas is combined with the high-temperature gas, and the high-temperature gas ignites the gas to realize MILD combustion in the second combustion chamber 30 . Wherein, the first combustion chamber 20 is a preheating combustion chamber, and the second combustion chamber 30 is a high-temperature air combustion chamber.

When performing preheating combustion and high-temperature air combustion, in order to complete the combustion at different stages, it is necessary to adjust the ratio of air and gas in different combustion chambers. A fan and a premix chamber are provided upstream of the hot combustion chamber to provide a suitable ratio of air and gas to the first combustion chamber. A fan can be used to inhale air, mix it with gas, and then inject it into the first combustion chamber 20 and the second combustion chamber 30 . For this reason, in this implementation, a flow divider 200 is provided, so that during the operation of the burner, the flow divider 200 divides the gas delivered by the intake chamber 10, so as to deliver the gas to the first combustion chamber 20 and the second combustion chamber 30 respectively. , so as to complete the preheating of gas and air when the gas is delivered to the first combustion chamber 202 .

It should be noted that the target temperature of the high-temperature preheating air should not be too low, try not to be lower than 600 degrees Celsius, generally controlled at 600 to 1200 degrees Celsius can ensure that when the high-temperature gas contacts the gas in the second combustion chamber 30, a better Automatic combustion, no longer need to ignite to start ignition. Among them, the target temperature can be achieved by controlling the heating time, controlling the gas-air ratio, keeping warm, increasing the residence time of the high-temperature gas in the first combustion chamber 20 and other methods. The injection speed and flow rate of the gas delivered by the flow divider 200 to the second combustion chamber 30 can be adjusted according to the demand, specifically, it can be adjusted according to the preset temperature, ambient temperature, water inlet flow rate, water outlet temperature, ambient pressure, etc., and the adjustment ratio is the same as The process can be predetermined and set by experimentation.

In some embodiments of the present application, the intake chamber 10 may be an air intake chamber 10 or a gas intake chamber 10 , and the flow divider 200 may deliver unmixed air to the first combustion chamber 20 and the second combustion chamber 30 . The mixed gas of fuel gas and air can also be sent to the second combustion chamber 30, and the mixed gas flows to the flow divider 200, and a part of the gas enters the first combustion chamber 20 to burn through the flow divider 200; the other part of the gas is blocked by the flow divider 200, from The disturbed flow on both sides is injected downward into the second combustion chamber 30 for combustion.

When the gas and air are mixed first, it can be realized by using a pre-mixer. The pre-mixer is set in the intake chamber 10, for example, it can be set in the first combustion chamber 20 or the second combustion chamber 30. Due to the pre-mixing The burner provides a mixed gas containing gas and air, and the preheating burner ignites and burns the mixed gas to realize high-temperature preheated air, and then sends gas or air to the second combustion chamber 30 through the flow divider 200 to generate an entrainment effect , so that the high-temperature flue gas reflows. On the one hand, it realizes heat preservation so that the temperature is higher than the spontaneous ignition point of the fuel, so that the gas in the combustion chamber can spontaneously ignite. , so that high-temperature air combustion occurs in the combustion chamber, which can meet the MILD combustion requirements and reduce CO and NOx emissions. That is to say, the technical solution of this embodiment is beneficial to simultaneously meet the above two conditions required to realize MILD combustion, and realize high-temperature air combustion smoothly. Moreover, the structure of the burner frame can miniaturize the components that realize high-temperature air combustion, so that it has more application space and value. In addition, it has low noise, sufficient combustion, and low exhaust gas pollution. It is used in gas hot water Equipment and related products and equipment, including gas wall-hung boilers, which use gas combustion to generate high-temperature hot water for family bathing and heating, not only meet the requirements, but also bring sufficient combustion that the burner in the existing water heater does not have. , Low pollutant emission effect.

In this embodiment, the flow splitter 200 is set so that under the splitting action of the flow splitter 200, the gas output from the intake chamber 10 is divided into at least two gas flow paths for output, so that a part of gas and/or air is injected into the first combustion chamber 20, After the first combustion chamber 20 burns, high-temperature flue gas is formed, another part of gas and/or air is injected into the second combustion chamber 30, and the high-temperature flue gas formed by combustion in the first combustion chamber 20 is injected into the second combustion chamber 30 at a high speed. The gas and air are entrained, so that the gas and/or air injected into the second combustion chamber 30 are preheated, and finally high-temperature air combustion is achieved, reducing CO and NOx emissions from gas-fired hot water equipment. In this application, the gas or air, or the mixture of gas and air is properly distributed to the two-stage combustion chambers in the high-temperature air combustion through the splitter 200, so that no additional solenoid valves are needed to control the air distribution of the two-stage combustion chambers. The control on air distribution can be effectively reduced, and at the same time, the flow divider 200 has a simple structure, is easy to implement, and can be widely applied to combustion gas hot water equipment with two-stage combustion chambers, and is also beneficial to reduce the cost of gas hot water equipment.

In an embodiment provided by the present application, referring to Fig. 1 and Fig. 2, in an embodiment, the combustion body 100 includes:

a combustion casing 110 formed with the first combustion chamber 20 and the second combustion chamber 30; and

The air intake housing 120, the air intake housing 120 is covered on one side of the combustion housing 110, and is enclosed with the combustion housing 110 to form the air intake chamber 10;

The combustion casing 110 is provided with a first air inlet 121a communicating with the air intake chamber 10 and the first combustion chamber 20 and a second air inlet 121a communicating with the air intake chamber 10 and the second combustion chamber 30 Air port 121b.

In this embodiment, the intake housing 120 may be a housing of a pre-mixer, and the pre-mixer may be assembled into the intake housing 120, or the intake housing 120 may also be formed as a gas distribution chamber. The combustion housing 110 forms the first combustion chamber 20 and the second combustion chamber 30. At the same time, part of the structure of the heat exchanger of the gas water heater can also be assembled into the combustion housing 110. The combustion housing 110 and the intake housing The 120 body can be fixed and connected directly by means of screws, buckles and the like. Under the action of the splitter 200, the gas in the intake chamber 10 flows to the first intake port 121a and the second intake port 121b respectively, thereby providing preheating combustion to the first combustion chamber 20 through the first intake port 121a. The required air and gas are raised to the second combustion chamber 30 through the second air inlet 121b to the air and gas required for high-temperature air combustion. The air intake casing 120 may be provided with a boss, and when the flow divider 200 is arranged in the air intake chamber, it may be fixed on the air intake casing 120 where the air intake chamber is located by screws.

In an embodiment provided by the present application, referring to FIG. 1 and FIG. 2, the shunt 200 in the embodiment of the present application includes:

The baffle plate 211 is blocked between the intake chamber 10 and the first combustion chamber 20, and the baffle plate 211 is provided with a plurality of air holes 211a to form a gas inlet chamber 10 for the gas to flow into the baffle plate 211. The first flow path of the first combustion chamber 20;

A second flow path for the gas in the intake cavity 10 to flow into the second combustion chamber 30 is formed between the side of the baffle plate 211 and the wall of the intake cavity 10 .

In this embodiment, as shown in FIG. 5 , the dotted line in FIG. 5 indicates that the gas flowing out from the air inlet chamber 10 forms at least two flow paths under the action of the baffle 211, and the baffle 211 can extend into the air inlet chamber. 10, and a gap is formed between the baffle plate 211 and the wall of the intake chamber 10, an air hole 211a is set in the middle of the baffle plate 211 or at a position corresponding to the first combustion chamber 20, and the gas output from the air intake chamber 10 passes through the air hole Under the action of 211a, it flows into the first combustion chamber 20 to provide the first combustion chamber 20 with air and gas required for preheating and combustion.

The side of the baffle 211 and the wall of the intake chamber 10 define a gas flow path that flows into the second combustion chamber 30 at least. The second flow path formed between the walls of the intake chamber 10 flows into the second combustion chamber 30 , so as to provide the air and gas required for high-temperature air combustion for the second combustion. Wherein, the number, position and aperture of the air holes 211a on the baffle 211, as well as the area of the baffle 211, etc. can be set according to the model of the gas hot water equipment used, so as to adjust the flow to the first combustion chamber 20 and the second combustion chamber 30 gas flow distribution, so as to achieve MILD combustion state.

Referring to Figures 1 and 2, in one embodiment, one or more side plates 211 are arranged on the side of the baffle plate 211 facing the direction of the air inlet chamber 10, so as to control the flow of the second flow path. Make a spoiler.

In this embodiment, there are side plates extending upward around the baffle plate 211 to disrupt the flow of the inflowing mixed gas. On one side of the combustion chamber 20, the number of side plates 212 can be one or more, specifically two or four. On opposite sides, when there are four, the four side plates 212 are respectively arranged on the four sides of the baffle plate 211 . The height of the baffle plate 211 is adjustable. When the height of the baffle plate 211 is higher, the flow of gas flowing into the second combustion chamber 30 is less; when the height of the baffle plate 211 is lower, the gas flow into the second combustion chamber 30 The more the flow rate is, the ratio of gas flow distribution to the first combustion chamber 20 and the second combustion chamber 30 can be adjusted.

Referring to Fig. 2 and Fig. 3, in one embodiment, the frame body part 111 includes a first end cap 1111, a second end cap 1112 oppositely arranged, and a connection between the first end cap 1111 and the second end cap 1112. A peripheral side plate 1113 , the peripheral side plate surrounds the first end cover 1111 and the second end cover 1112 to form a combustion chamber.

The frame portion 111 has a first side and a second side opposite to each other along the combustion direction, and the first combustion chamber 20 and the second combustion chamber 30 are arranged in sequence from the first side to the second side.

Referring to Fig. 2 and Fig. 3, in one embodiment, the combustion casing 110 further includes:

A fixed plate 112, the fixed plate 112 is covered on the first side of the frame part 111, and the first air inlet 121a is provided at the position of the fixed plate 112 corresponding to the first combustion chamber 20;

The fixing plate protrudes toward the first combustion chamber to form a mounting portion corresponding to the periphery of the first air inlet 121a, for the fixed installation of the preheating burner.

In this embodiment, the first side of the frame part 111 is fixedly connected to the air intake housing 120, the fixing plate 112 is interposed between the frame part 111 and the air intake housing 120, and the frame part 111 can be provided with Screw holes, corresponding positions on the air intake housing 120 and the fixed plate 112 are provided with through holes, the screws pass through the through holes on the air intake housing 120 and the fixed plate 112, and are installed in the screw holes of the frame part 111, so that The intake casing 120 , the fixing plate 112 and the frame part 111 are fixed by screws. The fixed plate 112 covers the frame opening, and at least two air inlets are provided on the fixed plate 112, that is, the first air inlet 121a and the second air inlet 121b. Further, the fixed plate 112 corresponds to the The peripheral edge of the first air inlet 121a protrudes toward the first combustion chamber 20 to form a mounting portion for the spoiler 300 and the porous medium 400 to be fixedly mounted. Wherein, the size of the installation portion, that is, the diameter of the first air inlet 121 a can be set according to the areas of the spoiler 300 and the porous medium 400 .

In an embodiment of the present application, a preheating burner is provided in the first combustion chamber, and the preheating burner includes:

The spoiler 300 , the spoiler 300 is disposed between the flow splitter 210 and the first combustion chamber 20 to disturb the gas flowing into the first combustion chamber 20 .

Specifically, the spoiler 300 is a porous spoiler, and the porous spoiler is provided with a plurality of spoiler flow holes, and the apertures of the plurality of spoiler flow holes are smaller than the apertures of the air holes 211a of the flow divider 210 .

In this embodiment, the spoiler 300 can be implemented with a porous spoiler or a comb structure. In this embodiment, the spoiler 300 is selected as a porous spoiler to make the gas flowing into the first combustion chamber 20 more uniform , so as to ensure that the gas can be evenly mixed with the mixed gas and air in each area of the first combustion chamber 20 . The aperture of the turbulent flow hole is smaller than the aperture of the air hole 211a of the flow divider 210, and the ratio of the aperture of the turbulent flow hole to the aperture of the flow divider 210 is adjustable, and the flow to the first combustion chamber 20 and the first combustion chamber 20 can also be adjusted by adjusting the aperture of the multi-hole spoiler. The gas flow distribution ratio of the second combustion chamber 30 . When the diameter of the turbulent flow hole is larger, the flow rate of the gas flowing into the first combustion chamber 20 is larger, which can make the gas flow into the first combustion chamber 20 faster while making the gas more uniform. When the aperture of the spoiler flow hole is smaller, the gas flowing into the first combustion chamber 20 is more uniform, and the speed of the gas flowing to the first combustion chamber 20 is also blocked, and the residence time of the gas in the intake chamber is increased, so that more The gas flows to the second combustion chamber 30. Wherein, the air hole 211a and the turbulence flow hole of the flow divider 210 can be set as a circular through hole, or a square through hole, or a strip-shaped through hole, and the air hole 211a and the turbulence flow hole of the flow divider 210 can be set to be the same or different. .

1 and 2, in one embodiment, the preheating burner is installed in the first combustion chamber 20 formed by the main body, and the preheating burner is used to ignite the mixed gas and deliver it to the first combustion chamber 20 of the burner 100, And preheat the first combustion chamber 20 to the target temperature. Wherein, the preheating burner further includes: a porous medium 400 disposed between the spoiler 300 and the first combustion chamber 20 .

In this embodiment, the preheating burner adopts the porous medium 400 combustion method, and the porous medium 400 plate in the first combustion chamber 20, wherein the porous medium 400 can be a porous medium 400 material made of metal fibers, and its thermal conductivity and mechanical properties The strength is better, which is conducive to the return of heat, which is conducive to reducing the combustion space and enhancing the combustion intensity and heat transfer intensity.

Referring to Fig. 2 and Fig. 3, in one embodiment, a gas connecting piece 114 is provided on the outside of the peripheral side plate 113 of the combustion shell, and the position corresponding to the gas connecting piece 114 is set on the fixing plate 112 The second air inlet 121b and the gas connecting piece 114 are in communication with the air intake cavity and the second combustion chamber 10 .

The second air inlet 121 b is located on the fixed plate 112 at a position corresponding to the gas connection piece 1114 , and the gas connection piece 1114 communicates with the air intake chamber 10 and the second combustion chamber 30 . By forming a connection channel in the gas connection part 1114 , the gas output from the intake chamber 10 can flow into the second combustion chamber 30 from the second flow path formed by the flow divider 200 and the wall of the intake chamber 10 . The gas connection 1114 extends along the length of the combustion body 100 . The gas connection piece 1114 has a pipe body with an opening (air inlet 1114a) on the side facing the inlet chamber 10, and the inlet 1114a facing the inlet chamber 10 is used to access the gas output by the inlet chamber 10, There is at least one gas outlet on the other side of the pipe body, and the gas outlet communicates with the second combustion chamber 30 . Two gas connectors 1114 are provided on both sides of the combustion body, so as to deliver gas to the second combustion chamber 30 from both sides, so that the gas flowing into the second combustion chamber 30 can be more uniform. Of course, in other embodiments, the number of the gas connecting piece 1114 can also be set to one, which is not limited here.

Referring to FIG. 2 and FIG. 3 , in one embodiment, a plurality of air holes 1114b are provided at one end of the gas connecting member 1114 close to the second combustion chamber 30 for gas to flow into the second combustion chamber 30 .

In this embodiment, after the gas entering from the gas connecting piece 1114 is disturbed by the multiple air holes 1114b, the gas is sprayed into the second combustion chamber 30, and the injection flow rate of the multiple air holes 1114b is more uniform, and can ensure that each air hole 1114b injection gas flow rate, and then achieve more stable combustion of the entire second combustion chamber 30, so as to realize entrainment and dilution of high-temperature smoke gas, so that the gas and air in the second combustion chamber 30 can be mixed evenly, so that the oxygen concentration of the second combustion chamber 30 It will also be balanced and lower than a certain value. When burning, not only the gas can be fully combusted, which reduces the emission of pollutants, but also the gas in the second combustion chamber 30 will burn evenly, and local over-combustion will not occur. The problem of loud noise. In addition, high-speed jet entrainment is achieved through multiple air holes 1114b on both sides, and high-temperature flue gas backflow can be realized, which can keep the temperature of the second combustion chamber 30 higher than the self-ignition point of the fuel, as long as the gas is continuously injected. combustion. The heat after combustion can be exchanged with the heat exchanger 50 of the gas-fired hot water equipment to realize the production of hot water. By setting gas connection pieces 1114 on both sides in the width direction of the combustion body 100, and making the multiple air holes 1114b of the two gas connection pieces 1114 arranged sequentially in the length direction of the combustion body 100, the combustion body 100 can be Inject gas and/or air into the second combustion chamber 30 on opposite sides of the opposite sides, on the one hand, increase the gas injection amount, and on the other hand, make the mixed gas of gas and air evenly distributed in the combustion chamber, fully combined with high-temperature air combustion.

2 and 3, in one embodiment, at least one first water cavity 111a is formed in the first end cover 1111, and at least one second water cavity 111b is formed in the second end cover 1112. The first water chamber 111a and the second water chamber 111b communicate with each other through at least one heat absorption pipe 500 to form a water circulation path.

In this embodiment, by setting the heat absorption pipe 500 to form a water passage, a water passage can also be designed inside the combustion body 100 . The water passages are all formed by the channels in the heat absorbing pipe 500 , or all can be formed by the channels in the combustion body 100 . It is also possible to make the water channel partly formed by the channel in the heat absorption pipe 500 , and partly formed by the channel in the combustion body 100 . The flow path of the water passage can only extend along a part of the wall of the combustion body 100 , or can be arranged around the wall of the combustion body 100 , or can be arranged in a spiral shape and multi-layered around the wall of the combustion body 100 .

The first water cavity 111a is formed in the first end cover 1111, the second water cavity 111b is formed in the second end cover 1112, and a heat absorption tube 500 is connected in series to form a water passage, so that the large specific heat capacity of water can be fully utilized The water flowing in the water passage can take away the heat of the combustion body 100 and absorb the heat of the first combustion chamber 20 and the second combustion chamber 30, so that the entire water passage can absorb the heat of the combustion body 100 and the combustion chamber 11 better. it is good. Wherein, the heat absorption pipe 500 may be specifically arranged as a straight pipe, extending along the length direction of the combustion body 100 . By forming the first water cavity 111a in the first end cover 1111 and the second water cavity 111b in the second end cover 1112, the space in the end cover is fully utilized without affecting the use effect of the end cover, so that the water channel The flow through the inside of the first end cover 1111 and the second end cover 1112 makes the overall cooling area larger. Moreover, the heat-absorbing pipe 500 is located in the combustion chamber 11, so that the heat exchange rate between the heat-absorbing pipe 500 and the airflow in the combustion chamber 11 can be improved, and the temperature in the combustion chamber 11 can be sufficiently reduced to prevent heat from radiating to the outside of the burner 100, reducing production of pollutants. The material of the heat-absorbing pipe 500 should be a material with high temperature resistance and good thermal conductivity. Wherein, the first end cover 1111 is surrounded by the first sub-end cover 1111a and the first sub-end cover 1111b, and the first sub-end cover 1111a and the second sub-end cover 1111b form the first water cavity 111a. Similarly, the first end cover 1112 is surrounded by the second sub-end cover 1112a and the second sub-end cover 1112b, and the second sub-end cover 1112a and the second sub-end cover 1112b form the first water cavity 111b.

Referring to Fig. 2 and Fig. 3, in one embodiment, the number of the peripheral side plates 1113 is two, and the two peripheral side plates 1113 are arranged opposite to each other;

The two peripheral side plates 1113 are respectively provided with air inlets communicating with the gas connection piece 1114 .

In this embodiment, MILD air inlet through-holes 10 are provided on the two peripheral side plates 1113, and the air inlet of the gas connection piece 1114 communicates with the MILD air inlet 10 of the two peripheral side plates 1113 to access the mixing gas. The gas connection piece 1114, the peripheral side plate 1113 and the combustion body 100 can be fixedly connected by means of screws, welding or the like. By forming a connection channel in the gas connection part 1114 , the gas output from the intake chamber 10 can flow into the second combustion chamber 30 from the second flow path formed by the flow divider 200 and the wall of the intake chamber 10 . The gas connection 1114 extends along the length of the combustion body 100 . The gas connection piece 1114 has a pipe body with an opening (air inlet 1114a) on the side facing the inlet chamber 10, and the inlet 1114a facing the inlet chamber 10 is used to access the gas output by the inlet chamber 10, There is at least one gas outlet on the other side of the pipe body, and the gas outlet communicates with the second combustion chamber 30 . Two gas connectors 1114 are provided on both sides of the combustion body, so as to deliver gas to the second combustion chamber 30 from both sides, so that the gas flowing into the second combustion chamber 30 can be more uniform. Of course, in other embodiments, the number of the gas connecting piece 1114 can also be set to one, which is not limited here.

Referring to FIG. 2 and FIG. 3 , in one embodiment, a plurality of gas holes 1114b are provided at one end of the gas connecting member 1114 close to the second combustion chamber 30 for gas to flow into the second combustion chamber 30 .

In this embodiment, after the gas entering from the gas connecting piece 1114 is disturbed by the multiple gas holes 1114b, the gas is sprayed into the second combustion chamber 30, and the injection flow rate of the multiple gas holes 1114b is more uniform, and it can ensure that each The gas flow rate injected by each gas hole 1114b, and then realize the combustion of the whole second combustion chamber 30 is more stable, so as to realize entrainment and dilution of high-temperature flue gas, so that the gas and air in the second combustion chamber 30 can be mixed evenly, so that the second combustion chamber 30 The oxygen concentration in the second combustion chamber will also be balanced and lower than a certain value. When burning, not only the gas can be fully combusted, which reduces the emission of pollutants, but also the gas in the second combustion chamber 30 will also burn evenly, and there will be no The problem of excessive local combustion and noise. In addition, high-speed jet entrainment is achieved through multiple gas holes 1114b on both sides, and high-temperature flue gas backflow can be realized, so that the temperature of the second combustion chamber 30 can be kept higher than the self-ignition point of the fuel, as long as the gas is continuously injected. Keep burning. The heat after combustion can be exchanged with the heat exchanger 50 of the gas water heater to obtain hot water. By arranging gas connecting pieces 1114 on both sides in the width direction of the combustion body 100, and making the multiple gas holes 1114b of the two gas connecting pieces 1114 arranged sequentially in the length direction of the combustion body 100, the combustion body can be The opposite sides of 100 inject gas and/or air into the second combustion chamber 30. On the one hand, the gas injection volume is increased, and on the other hand, the mixed gas of gas and air is evenly distributed in the combustion chamber, and is fully combined with high-temperature air. to burn.

Referring to Fig. 2 and Fig. 4, in one embodiment, the gas connection piece 1114 is provided on the outside of the peripheral side plate 1113, and the second gas connection piece 1114 is provided on the fixed plate 112 The air inlet 121b, the gas connecting piece 1114 communicates with the air inlet chamber 10 and the second combustion chamber 30 .

A gap is formed between the flow divider 210 and the inner side wall of the intake housing 120, α is the distance between the divider baffle and the inner wall of the intake housing, and between the flow divider 210 and the fixed plate 112 A gap is formed, β is the distance between the flow divider 210 and the fixed plate 112, and the gap α is the flow path for the gas in the intake chamber 10 to flow into the first combustion chamber 20 and the second combustion chamber 30 from the side .

A gap β is formed between the splitter 210 and the fixing plate 112 , and the gap is a flow path for the gas in the second flow path intake chamber 10 to flow into the first combustion chamber 20 from the middle.

In this embodiment, the gap β formed between the flow divider 210 and the inner side wall of the intake housing 120 is the second flow path, and the gap formed between the flow divider 210 and the fixed plate 112 is the flow into the first combustion chamber 20 That is to say, the gas output from the intake chamber 10 flows to the flow divider 210, and a part of the gas flows directly to the porous spoiler through the porous structure on the flow divider 210, and enters the first combustion chamber 20 through the porous medium 400 for combustion ( The first flow path 1); another part of the gas is blocked by the flow divider 210, disturbing the flow downward from both sides (the second flow path), and splitting the flow again at the junction of the fixed plate 112 and the combustion shell 110, and a part flows to the porous spoiler (the second flow path branch 21), and enter the first combustion chamber 20 to burn through the porous medium 400, and the other part then passes through the gas connection piece 1114, that is, the MILD intake chamber 10, and injects into the second combustion chamber 30 for combustion ( Second flow path branch 22).

Therefore, by adjusting the gap α, the gap β, and the opening size γ of the MILD intake chamber 10, the total air flow of the second flow path, the air flow of the second flow path branch 1, and the second flow path branch 1 are adjusted. The air flow of the road 2 can be adjusted to realize the proportional adjustment of the air-fuel ratio of the second combustion chamber, and the condition of high-temperature air combustion can be achieved without adding supplementary air or gas to the second combustion chamber.

Of course, in other embodiments, the air hole 211a may not be provided on the baffle plate 211. If there is no hole on the baffle plate, after the gas flows in from the inlet of the air intake chamber 10, it will be directly disturbed by the baffle plate 211 to the peripheral side of the baffle plate 211. . It can be adjusted by adjusting the size of the baffle plate 211, the number and distribution of holes on the flow divider 210, the distance α between the baffle plate and the intake housing 120, the distance β between the baffle plate and the fixed plate 112, and the size of the MILD intake chamber 10. The opening size γ is used to adjust the gas flow distribution to the first combustion chamber 20 and the second combustion chamber 30, so as to achieve the MILD combustion state. The distance between the flow divider 210 and the inner sidewall of the intake housing 120 is adjustable. The distance between the splitter 210 and the fixing plate 112 is adjustable.

In a specific embodiment, the baffle 211 can be driven to move by a driving member, thereby adjusting the relative distance between the baffle 211 and the fixed plate 112 , and adjusting the relative distance α between the baffle 211 and the intake housing 120 , Then adjust the size of the gap to realize the distribution of gas flow.

Referring to FIG. 9 to FIG. 12 , in an embodiment provided by the present application, the flow divider 200 is arranged in a plate shape, and the flow divider 200 arranged in a plate shape is close to the first air inlet 121a of the combustion casing 110 and the second air inlet 121b.

In this embodiment, the intake housing 120 communicates with the pre-mixer, and the intake housing 120 is provided with a mixed gas inlet 120a, and the gas and air mixed gas enters the intake chamber 10 from the mixed gas inlet 120a, The mixed gas of gas and air flows to the first air inlet 121a and the second air inlet 121b respectively under the splitting action of the flow divider 200 . A plurality of air holes 211a are arranged on the flow divider 200 arranged in a plate shape, a part of the plurality of air holes 211a is set corresponding to the first air inlet 121a, and another part of the plurality of air holes 211a is set corresponding to the second air inlet 121b, so as to A first flow path is formed for the gas of the intake cavity 10 to flow into the first combustion chamber 20 ; and a second flow path for the gas of the intake cavity 10 to flow into the second combustion chamber 30 is formed. In one embodiment, the aperture diameter of the air hole 211a corresponding to the first air inlet 121a is different from the aperture diameter of the air hole 211a corresponding to the second air inlet 121b. The aperture is larger than the aperture corresponding to the air hole 211a of the second air inlet 121b. The diameter of the pores 211a can be specifically set according to flow distribution, etc., and is not limited here. The gas output from the intake chamber 10 flows into the first combustion chamber 20 and the second combustion chamber 30 through the air holes 211a, so as to provide the first combustion chamber 20 and the second combustion chamber 30 with air and gas required for combustion. Using the structure of Example 1, the experimental test found that when the whole machine is 35kw, the converted CO emission is 12.6ppm, NOx is 5.8ppm, and the machine noise is significantly reduced. After the increase, under the load of 30kw, the converted CO and emissions of the MILD combustion gas water heater reached 11.2 and 5.9ppm respectively, which were much smaller than the emission value of the fully premixed gas water heater before the increase.

It can be understood that when the gas and air mixed gas enters the air intake chamber 10 from the mixed gas inlet port 120a, the gas has a certain dynamic pressure, and under the diversion action of the flow divider 200, the gas enters the first air intake chamber. The inlet 121a and the second air inlet 121b are static pressure, if the flow divider 200 is set close to the mixed gas inlet 120a, or when the flow divider 200 is set away from the first air inlet 121a and the second air inlet 121b, there will be A certain pressure loss will increase the pressure loss, and when it flows into the first air inlet 121a and the second air inlet 121b, there will also be a certain dynamic pressure, which will make it flow into the first combustion chamber and the second air inlet 121b. The gas pressure in the second combustion chamber is not uniform, resulting in noise when the machine is burning.

Referring to Fig. 10, for this purpose, the flow divider 200 of this embodiment is arranged in a plate shape, and the flow divider 200 is arranged close to the first air inlet 121a and the second air inlet 121b of the combustion shell 110, that is, the flow divider 200 is arranged as far as possible It is located away from the mixed gas inlet 120a. Such arrangement makes the volume of the pressure equalizing chamber formed between the splitter plate and the inlet chamber the largest without changing the size of the inlet chamber (reducing mold opening), thereby improving the pressure uniformity of the mixed gas. Moreover, the gas and air mixed gas flowing in from the mixed gas inlet 120a are less obstructed by the air intake cavity 10, and the gas can flow directly to the splitter plate, and then flow into the first air inlet respectively under the split flow of the splitter plate. 121a and the second air inlet 121b can reduce the pressure loss of gas and air mixture in the air inlet cavity. Since the flow divider 200 arranged in a plate shape is arranged close to the first air inlet 121a and the second air inlet 121b of the combustion casing 110, the gas pressure can be fully converted from dynamic pressure to air inlet in the air inlet chamber. Static pressure, thereby ensuring the uniform pressure of the gas entering the first combustion chamber and the second combustion chamber, which can reduce the noise of the machine during combustion.

Referring to FIG. 11 , in one embodiment, the flow divider 200 is attached to the combustion casing 110 .

In this embodiment, the combustion casing 110 includes a fixed plate, and the flow divider 200 can be attached to the fixed plate.

The combustion shell 110 and the intake shell 120 are set up and down, the intake shell 120 can be set above the combustion shell 110, or the combustion shell 110 can be set above the intake shell 120, and the flow divider 200 can be set Between the combustion casing 110 and the intake casing 120 , the intake casing 120 and the splitter 200 surround the combustion casing 110 to form the intake cavity 10 . Therefore, when the splitter plate is as far away from the mixed gas inlet 120a as possible, the distance γ between the splitter plate and the fixed plate is 0, and they are directly attached to each other, so that the splitter plate and the fixed plate can be ensured without changing the size of the air intake cavity. The pressure equalization chamber formed between the mixing chambers has the largest volume, which improves the pressure uniformity of the mixed gas.

Referring to FIG. 11 , in an embodiment provided by the present application, the side of the flow divider 200 is disposed close to the inner wall of the air intake housing 120 .

In this embodiment, the side of the splitter 200 can be close to the intake housing 120, specifically, the distance α between the splitter plate and the mixing chamber is very small, for example, it can be set to 0.1mm, and the distance α is used for the splitter 200 and the mixing chamber. The reserved assembly clearance of the air intake housing 120 . In some embodiments, the flow divider 200 can also be interposed between the combustion housing 110 and the intake housing 120, and the three can be connected directly through the combustion housing 110 and the intake housing 120 through screws or buckles. Fixed connection in the same way.

Referring to FIG. 9 to FIG. 12 , in an embodiment provided by the present application, the flow divider 200 is fixed to the combustion casing 110 ;

Alternatively, the splitter 200 is fixed on the intake casing 120 .

In this embodiment, when the flow divider 200 is fixed to the combustion casing 110 , the combustion casing 110 may be provided with a fixing column, and the flow divider 200 may be fixed to the combustion casing 110 through the locking fit of the screw and the fixing column. When the flow divider 200 is fixed to the intake housing 120 , the intake housing 120 may be provided with a fixing column, and the flow divider 200 may be fixed to the intake housing 120 through the locking fit between the screw and the fixing column.

The application also proposes a gas hot water device.

Referring to Figures 6 to 8, in an embodiment of the present application, the gas hot water equipment includes:

A main body, the main body is provided with a heat exchange chamber 40 and a smoke exhaust port 40a communicating with the heat exchange chamber 40;

The heat exchanger 600 is arranged in the heat exchange chamber 40; the heat exchanger communicates with at least one heat absorption pipe on the combustion shell of the burner.

The above-mentioned burner 100 is installed on the main body, and the flue gas outlet of the burner 100 communicates with the heat exchange chamber 40 .

In this embodiment, the specific structure of the burner 100 refers to the above-mentioned embodiments, and the main body is provided with a heat exchange chamber 40 and a smoke exhaust port 40a communicating with the heat exchange chamber 40; the heat exchanger 600 is arranged in the heat exchange chamber 40; The burner 100 is installed on the main body; the flue gas outlet 111d of the burner 100 communicates with the heat exchange chamber 40; Mixed combustion with the gas and/or air fed into the second combustion chamber 30 to realize high-temperature air combustion. Since the gas-fired hot water equipment adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments. It can be understood that, due to the use of the burner 100 in the gas-fired water heater, the gas-fired water heater can effectively reduce the emission of CO and NOx and reduce the noise of the gas-fired water heater.

It can be understood that since the above-mentioned burner 100 is used in the gas-fired water heating equipment of the present application, the embodiments of the gas-fired water heating equipment of the present application include all the technical solutions of all the embodiments of the above-mentioned burner 100, and the achieved technical The effect is also exactly the same, and will not be repeated here.

The burner 100 can be installed independently from the main body of the gas wall-hung boiler, and the connection and fixation between the burner 100 and the main body of the gas wall-hung boiler can be realized by means such as screw connection and buckle fixing, which is convenient for disassembly and replacement at any time; of course In other words, the burner 100 can also be used as a component of the main body of the gas wall-hung boiler, which is integrally formed with the main body, which is easy to process and makes the structure of the whole machine more compact.

The first combustion chamber 20, the second combustion chamber 30, and the heat exchange chamber 40 can be installed independently. After sufficient combustion is achieved in the combustion chamber to generate sufficient combustion smoke, the combustion smoke passes through the communication between the combustion chamber and the heat exchange chamber 40. Discharge into the heat exchange chamber 40 to achieve the purpose of heat exchange. Of course, the second combustion chamber 30 and the heat exchange chamber 40 can also be integrally arranged, the second combustion chamber 30 can constitute at least part of the heat exchange chamber 40, and at least part of the heat exchange tubes can be further arranged directly in the combustion chamber to achieve better heat transfer effect.

Referring to Fig. 6 and Fig. 7, in one embodiment, the gas hot water equipment further includes a connecting pipe, the connecting pipe has a water inlet pipe and a water outlet pipe, the heat exchanger 600 has a water inlet and a water outlet, and the connecting pipe The water inlet pipe of the connecting pipe communicates with the water inlet of the heat exchanger 600 and the water inlet joint 150 , and the outlet pipe of the connecting pipe communicates with the water inlet of the heat exchanger 600 and the burner 100 .

The water inlet of the heat exchanger 600 can be connected with municipal tap water to realize the inflow of cold water. Connect the water inlet joint 150 of water outlet and burner 100 by connecting pipe, then need not set the water inlet joint 150 that tap water inlet connects burner 100 in addition. The water outlet joint 160 of the burner 100 can be connected to a domestic hot water end, such as a shower, a faucet, and the like. The water passage of the heat exchanger 600 and the water passage of the heat absorbing part 130 are connected in series through connecting pipes, so that the flow passage and structure can be simplified. At the same time, the heat absorbed by the heat absorbing part 130 is fully utilized to produce hot water for users.

Referring to Figure 6 and Figure 7, in one embodiment, the gas hot water equipment further includes a pre-mixer 700, which is used to pre-mix the gas and air inserted into it, and The air intake cavity 10 of the burner 100 delivers the mixed gas into the first combustion chamber 20 and the second combustion chamber 30 of the burner 100 . Since the mixed gas containing gas and air is provided by the pre-mixer 700, the preheating burner 100 ignites and burns the mixed gas to realize high-temperature preheating of the air, and then passes the incoming gas to the second combustion gas through the gas connection piece 1114. The injection chamber 30 produces entrainment effect, which makes the high-temperature flue gas flow back. On the one hand, it realizes heat preservation to make the temperature higher than the spontaneous ignition point of the fuel, so that the gas in the combustion chamber can spontaneously ignite. Below a certain value, uniform combustion is achieved, so that high-temperature air combustion occurs in the combustion chamber. That is to say, the technical solution of this embodiment is beneficial to meet these two conditions at the same time, and realize high-temperature air combustion smoothly.

In this embodiment, the pre-mixer 700 can be installed in the housing, and the air intake housing 120 is formed with an air inlet duct, a gas flow channel and a mixing channel, and the mixing channel is connected with the air inlet duct and the gas flow channel. They communicate with each other respectively, and the gas valve 310a is provided in the gas flow channel. When the mixed gas is needed, the air intake and gas valve 310a is opened according to the preset, so as to mix the mixed gas in the intake housing 120 to obtain a certain gas/air ratio, and then deliver the mixed gas to the first combustion chamber 20 and Inside the second combustion chamber 30 . In this way, the combustion in the first combustion chamber 20 and the second combustion chamber 30 is more complete. A fan can also be provided in the air intake chamber 10, and a mixed gas with a certain gas/air ratio can be obtained by mixing in the air intake chamber 10, and then the mixed gas can be delivered to the first combustion chamber 20 and the second combustion chamber 30 through the drive of the fan. Inside. Alternatively, the intake housing 120 is a mixed gas distribution chamber, the air inlet of the mixer distribution chamber communicates with the pre-mixer 700, and the mixed gas mixed by the pre-mixer 700 is sent to the mixed gas distribution chamber, and the mixed gas distribution chamber The gas outlet communicates with the first combustion chamber 20 and the second combustion chamber 30 to distribute and ignite the mixture of gases delivered to the first combustion chamber 20 and the second combustion chamber 30 .

Referring to FIG. 6 and FIG. 7 , in an embodiment, the flow divider 200 communicates with the pre-mixer 700 and the first combustion chamber 10 and the second combustion chamber 20 . Specifically, the pre-mixer 700 includes:

Air inlet and gas inlet;

Venturi tube (not shown), the first air inlet of the Venturi tube communicates with the first gas outlet 31b of the first gas flow regulating device 320, and the second air inlet of the Venturi tube communicates with the first gas outlet 31b of the first gas flow regulating device 320 The air inlet communicates;

A mixing chamber, the mixing chamber communicates with the Venturi tube and the first combustion chamber 20 and the second combustion chamber 30 .

In this embodiment, the burner 100 assembly can also be provided with an air pipeline. The air tubes together form the pre-mixer 700 communicating with the mixing chamber. Air can enter the Venturi tube from the inlet of the air line, and form an air vortex at the outlet of the Venturi tube. The air vortex can entrain the gas entering from the gas inlet pipe, so that the gas and air are fully mixed in the Venturi tube, so that the fully mixed gas and air mixture can be fully burned in the gas water heater, thereby improving combustion efficiency , and can reduce the generation of harmful substances such as nitrogen oxides (NOx) and carbon monoxide. In this embodiment, the Venturi tube communicates with the intake port and the mixing chamber to output the mixed gas to the first combustion chamber 20 and the second combustion chamber 30 .

6 and 7, in one embodiment, the pre-mixer 700 also includes:

Fan 720, the fan 720 is arranged in series between the air inlet and the Venturi tube;

Alternatively, the fan 720 is arranged in series between the Venturi tube and the air inlet chamber 700a.

In this embodiment, the gas and air can first enter the Venturi structure, and then the mixed gas enters the blower 720 for mixing. Therefore, the blower 720 needs to use an explosion-proof blower 720, so that the air and gas have a better mixing effect. Alternatively, the fan 720 can also be placed before the Venturi device. At this time, the fan 720 can use a common fan 720 to draw air into the Venturi tube through the fan 720 to complete the mixing of air and gas in the Venturi tube. Wherein, under the control of the electronic control unit 500, the blower 720 adjusts its rotational speed to provide the burner 100 with a corresponding flow rate of air or mixed gas under different working conditions, such as different heat load demands, to complete high-temperature air combustion.

Referring to Figure 6 and Figure 7, in one embodiment, the gas hot water equipment further includes:

A smoke exhaust assembly 800, the smoke exhaust assembly 800 communicates with the heat exchange chamber 40, the smoke exhaust assembly 800 includes a smoke exhaust pipe 810 and a smoke collection hood 820, the smoke exhaust assembly 800 includes a smoke exhaust assembly that communicates with the heat exchange chamber 40 and The pipe 810 and the smoke collecting hood 820, and the smoke outlet of the smoke exhaust pipe 810 are arranged on the upper end of the burner 100. There is a gas outlet, such as the gas outlet of the second combustion chamber 121 away from the first combustion chamber 1 , and the gas outlet of the burner 100 communicates with heat exchange. The smoke collecting hood 820 is arranged at the lower end of the heat exchanger 600 , and the smoke exhaust pipe 810 communicates with the smoke collecting hood 820 to exhaust the smoke from above the burner 100 .

Referring to FIG. 6 and FIG. 7 , in one embodiment, the condensation water assembly 900 communicates with the heat exchange chamber 40 .

Wherein, the condensed water assembly 900 includes a diversion structure arranged at the lower end of the gas chamber and a condensed water collecting part 910 corresponding to the position of the diversion structure; wherein, the condensed water collecting part 910 passes through the condensed water The component 900 communicates with the condensed water outlet and the gas chamber. When the water vapor in the combustion chamber encounters the side wall of the combustion chamber below a certain temperature, condensed water will be generated, and the condensed water will flow into the condensed water collecting part 910 through the diversion structure, such as the condensed water receiving tray. After injection, the liquid level of the condensed water will gradually rise, and flow out through the water seal structure and the condensed water drain pipe 920 . The condensed water assembly 900 also includes a condensed water drain pipe 920. One end of the condensed water drain pipe 920 communicates with the condensed water collector 910, and the other end communicates with the water outlet. The condensed water is well sealed during normal combustion. Drain along the condensate drain pipe 920, between the condensate water drain pipe 920 and the combustion chamber, or form a water seal structure on the condensate water drain pipe 920, the water seal structure has a depression that can store water to form a water seal It can be a section of pipe whose diameter is smaller than that of the condensed water drain pipe 920, or a certain section of the condensed water drain pipe 920 can be bent to form a circle-shaped structure, or can also be bent and twisted to form a U-shaped structure, and the condensed water The drainage pipe 920 can be realized by using materials such as silicone tubes. In addition, when the high-temperature flue gas generated by the burner 100 passes through the heat exchanger 600, it is partially condensed to produce acidic condensed water. In order to meet the discharge standard, it needs to be discharged after acid-base neutralization. Therefore, the gas water heater also includes a condensed water neutralizer , the condensed water neutralizer is arranged at the condensed water outlet of the gas water heater.

In order to better illustrate the application concept of the present application, the working principle of the present application will be described below in conjunction with the above-mentioned embodiments of the present application:

As shown in Figure 6-8, in the gas water heating equipment, the pre-mixer 700, the flow divider 200, the preheating burner, and the high-temperature air burner are arranged sequentially from top to bottom, and the condensed water component and the smoke hood are arranged in the At the lower end of the heat exchange chamber, the pre-mixer 700 is arranged above the splitter 200, and the preheating burner and high-temperature air burner, heat exchanger 600, smoke hood and condensate water assembly are arranged below the splitter 200 .

When the gas hot water equipment is working, the gas enters the fan 510 through the gas valve 310a and the gas conduit 520, and the air inhaled by the fan 510 through the air duct 530 is disturbed by the fan impeller in the full pre-mixer 700 arranged above the combustion chamber Fully mixed to form a certain proportion of air-gas mixture; under the action of the fan, the mixture is drawn into the Venturi tube through the fan 720, so as to complete the mixing of air and gas in the Venturi tube, and the diversion in the flow divider 200 Under the action, a part of the mixed gas is distributed to the first combustion chamber 120 for preheating combustion to generate high-temperature and low-oxygen flue gas, and the other part is distributed to the second combustion chamber 110. Under the action, it is heated and diluted to form high-temperature air combustion under the action of the high-temperature air burner 100 in the second combustion chamber. After the combustion is completed, the high-temperature flue gas is discharged through the heat exchanger 600, the fume collecting hood 900, and the exhaust pipe 810. After the high-temperature flue gas passes through the heat exchanger 600, it will be partially condensed to produce acidic condensate through the condensate collector 920. Discharge after acid-base neutralization.

The above are only optional embodiments of the present application, and are not intended to limit the patent scope of the present application. Under the inventive concept of the present application, the equivalent structural transformations made by using the description of the application and the contents of the accompanying drawings, or direct/indirect Applications in other relevant technical fields are included in the patent protection scope of the present application.

Claims (24)

1. A burner, wherein the burner includes:

   a combustion body having an intake chamber, a first combustion chamber, and a second combustion chamber communicated in sequence; and

   A splitter, arranged between the intake chamber and the first combustion chamber, the splitter is used to divide the airflow in the intake chamber and flow it to the first combustion chamber and the second combustion chamber respectively. room delivery.
2. The burner of claim 1, wherein said combustion body comprises:

   a combustion casing forming the first and second combustion chambers; and

   an air intake casing, the air intake casing is covered on one side of the combustion casing, and is enclosed with the combustion casing to form the air intake cavity;

   The combustion casing is provided with a first air inlet connecting the air inlet chamber with the first combustion chamber and a second air inlet connecting the air inlet chamber with the second combustion chamber.
3. The burner according to claim 2, wherein the flow divider is arranged in a plate shape, and the flow divider arranged in a plate shape is arranged close to the first air inlet and the second air inlet of the combustion casing.
4. The burner of claim 3, wherein said flow divider is bonded to said combustion casing.
5. The burner according to claim 3, wherein said combustion casing includes a fixed plate, and said diverter is attached to said fixed plate.
6. The burner according to claim 3, wherein the sides of the flow divider are disposed adjacent to the inner side wall of the intake housing.
7. The burner of claim 3, wherein said flow divider is fixed to said combustion casing;

   Alternatively, the splitter is fixed to the intake housing.
8. The burner according to claim 3, wherein the flow divider is provided with a plurality of air holes, a part of the plurality of air holes corresponds to the first air inlet, and another part of the plurality of air holes corresponds to The second air inlet is set;

   The apertures of the air holes corresponding to the first air inlet are different from the apertures of the air holes corresponding to the second air inlet.
9. The burner of claim 2, wherein said flow divider comprises:

   A baffle plate between the air intake cavity and the first combustion chamber, a plurality of air holes are arranged on the baffle plate, so as to allow the gas in the intake cavity to flow into the first combustion chamber first stream;

   A second flow path for the gas in the intake cavity to flow into the second combustion chamber is formed between the side of the baffle and the wall of the intake cavity.
10. The burner according to claim 9, wherein one or more side plates are arranged on the side of the baffle plate facing the direction of the air intake cavity, so as to disturb the air flow in the second flow path.
11. The burner of claim 9, wherein said combustion casing comprises:

    A frame body part, the frame body part includes a first end cover, a second end cover, and a peripheral side plate connecting the first end cover and the second end cover, the peripheral side plate and the first end cover The end cover and the second end cover surround and form a combustion chamber;

    The frame part has a first side and a second side opposite to each other along the combustion direction, and the first combustion chamber and the second combustion chamber are correspondingly arranged in sequence from the first side to the second side.
12. The burner of claim 11, wherein said combustion casing further comprises

    A fixed plate, the fixed plate cover is arranged on the first side of the frame part, and a first air inlet is provided on the fixed plate at a position corresponding to the first combustion chamber;

    The fixing plate protrudes toward the first combustion chamber to form a mounting portion corresponding to the periphery of the first air inlet, for fixing and installing the preheating burner.
13. The burner of claim 11, wherein said preheat burner comprises:

    A spoiler, the spoiler is arranged between the flow divider and the first combustion chamber, so as to disturb the gas flowing into the first combustion chamber;

    a porous media burner, the porous media burner is arranged between the spoiler and the first combustion chamber, and is used to ignite the mixed gas and deliver it to the combustion chamber of the burner, and burn the The chamber is preheated to the target temperature.
14. The burner according to claim 13, wherein the spoiler is a porous spoiler, and the porous spoiler is provided with a plurality of spoiler flow holes, and the diameter of the plurality of spoiler flow holes is smaller than the The air hole diameter of the splitter.
15. The burner according to claim 11, wherein a gas connector is provided on the outside of the peripheral side plate, and the second air inlet is provided on the fixed plate corresponding to the position of the gas connector, so The gas connecting piece communicates with the intake cavity and the second combustion chamber.
16. The burner according to claim 11, wherein at least one first water cavity is formed in the first end cover, at least one second water cavity is formed in the second end cover, and the first water cavity and the The second water cavities communicate with each other through at least one heat-absorbing pipe to form a water circulation path.
17. The burner according to claim 16, wherein the number of the peripheral side plates is two, and the two peripheral side plates are arranged opposite to each other;

    The two peripheral side plates are respectively provided with connection pieces communicating with the gas.
18. The burner according to claim 17, wherein a plurality of gas injection holes are provided at one end of the gas connecting member close to the second combustion chamber for injecting gas into the second combustion chamber.
19. The burner according to claim 11, wherein a gap is formed between the flow divider and the fixing plate, and the gap is for the gas in the air intake cavity of the second flow path to flow into the first combustion chamber. chamber flow.
20. A gas hot water device, including:

    A main body, the main body is provided with a heat exchange chamber and a smoke exhaust port communicating with the heat exchange chamber;

    a heat exchanger located in the heat exchange chamber;

    The burner according to claim 1, installed on the main body, the flue gas outlet of the burner communicates with the heat exchange chamber; and

    Inlet and outlet pipes connected to the heat exchanger.
21. The gas water heater as claimed in claim 20, wherein said heat exchanger communicates with at least one heat absorption pipe of said burner.
22. The gas water heating equipment according to claim 20, wherein the gas water heating equipment further comprises a pre-mixer installed on the main body and above the burner, and the pre-mixer is used for pre-mixing The gas and air in it are delivered to the first combustion chamber and the second combustion chamber of the burner through the intake chamber of the burner.
23. The gas water heater according to claim 22, wherein the gas water heater further comprises:

    a smoke exhaust assembly, the smoke exhaust assembly communicates with the heat exchange chamber;

    The condensed water assembly, the smoke exhaust assembly is set in communication with the heat exchange chamber.
24. The gas water heater according to claim 20, wherein the gas water heater further comprises a connecting pipe, the heat exchanger has a water inlet and a water outlet, and the connecting pipe connects the water outlet with the combustion chamber. water inlet connector of the device.

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