Burners and gas water heaters

Abstract

The present invention discloses a burner and a gas water heater. The burner comprises: a combustion body; an air storage device connected to the combustion body for storing gas; and an air delivery assembly for compressing and delivering gas to the air storage device for storage, and for controlling the supply of gas stored in the air storage device to the combustion body. The present invention utilizes the characteristics of high-temperature air combustion to design a novel burner. When applied to a gas water heater, the burner effectively reduces pollutant emissions (CO and NOx) and reduces noise.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature air combustion, and in particular to a burner and a gas water heater. Background Art

[0002] Gas water heater noise primarily comes from two sources: combustion noise and fan noise. Combustion noise is the result of intensely heated flue gases vibrating violently within the enclosed combustion chamber, creating a loud hum. High-temperature flue gases also generate noise in the heat exchanger area. Fan noise is caused by the constant need for air replenishment during gas combustion, which causes the fan to continuously rotate, causing the casing to resonate and generate mechanical noise. This can be extremely disruptive to users. Summary of the Invention

[0003] The main purpose of the present invention is to provide a burner and a gas water heater, aiming to reduce the emission of pollutants (CO and NOx) and reduce the noise of the gas water heater.

[0004] To achieve the above object, the present invention provides a burner, comprising:

[0005] combustion subject;

[0006] an air storage device, connected to the combustion body, for storing gas; and

[0007] The air supply assembly is used to compress the gas and deliver it to the air storage device for storage, and can control the gas stored in the air storage device to be provided to the combustion body.

[0008] Optionally, the air supply assembly includes:

[0009] A boosting device, the inlet of the boosting device is used to receive air, the boosting device is connected to the inlet of the air storage device, and the boosting device is used to compress the received air and output it to the air storage device.

[0010] Optionally, the boosting device is an air compressor.

[0011] Optionally, the combustion body has a first combustion chamber and a second combustion chamber that are interconnected;

[0012] The air storage device has a first air outlet and a second air outlet, the first air outlet is connected to the first combustion chamber, and the second air outlet is connected to the second combustion chamber; the air supply component also includes

[0013] The first pressure regulating device, the supercharging device and the first pressure regulating device are sequentially arranged between the second outlet of the air storage device and the second combustion chamber.

[0014] Optionally, the air supply assembly further includes:

[0015] a second pressure regulating device, the second pressure regulating device being arranged in series between the first air outlet and the air storage device; or the second pressure regulating device being arranged in series between the second air outlet and the second combustion chamber;

[0016] The second pressure regulating device is used to regulate the air flow delivered to the first combustion chamber and the second combustion chamber.

[0017] Optionally, the burner further comprises:

[0018] The gas delivery assembly is used to deliver gas to the combustion body and can control the flow rate of the gas delivered to the combustion body.

[0019] Optionally, the combustion body has a first combustion chamber and a second combustion chamber that are interconnected;

[0020] The gas supply assembly comprises:

[0021] a first gas valve having a first gas outlet and a second gas outlet, wherein the first gas outlet is connected to the first combustion chamber and is used to deliver gas to the first combustion chamber;

[0022] The second gas outlet is connected to the second combustion chamber and is used to deliver gas to the second combustion chamber.

[0023] Optionally, the burner further comprises:

[0024] An electronic control component is electrically connected to the air supply component and the air storage device, and is used to control the air storage device to deliver gas to the first combustion chamber and the second combustion chamber respectively, and to control the flow rate of the gas delivered to the second combustion chamber, so that the gas is heated to a preset target temperature in the first combustion chamber and then delivered to the second combustion chamber for high-temperature air combustion.

[0025] Optionally, the gas supply assembly further includes:

[0026] a second gas valve, the second gas valve being arranged in series between the first gas outlet and the first combustion chamber; or the second gas valve being arranged in series between the second gas outlet and the second combustion chamber;

[0027] The second gas valve is used to adjust the gas flow delivered to the first combustion chamber and the second combustion chamber.

[0028] Optionally, the gas delivery assembly includes:

[0029] A gas pressure regulating device, wherein the inlet of the gas pressure regulating device is connected to the second gas outlet of the first gas valve, and the outlet of the gas pressure regulating device is connected to the second combustion chamber, and the gas pressure regulating device is used to control the gas flow rate delivered to the second combustion chamber.

[0030] Optionally, the burner further comprises:

[0031] Gas pipes; and,

[0032] The mixer is used to pre-mix the air received from the air storage device and the gas received from the gas pipe, and provide the mixed gas to the gas body.

[0033] Optionally, the combustion body has a first combustion chamber and a second combustion chamber that are interconnected; wherein,

[0034] The first combustion chamber is a preheating combustion chamber, and the second combustion chamber is a high-temperature air combustion chamber.

[0035] Optionally, the burner further comprises:

[0036] A heat exchanger, one end of which is connected to a cold water inlet pipe, and the other end of which is connected to a hot water outlet pipe. The heat exchanger is used to absorb the heat generated by the combustion in the first combustion chamber and the combustion in the second combustion chamber and to exchange the absorbed heat with the water inside the heat exchanger.

[0037] The present invention also proposes a gas water heater, comprising the burner as described above; the burner comprises: a combustion body; an air storage device connected to the combustion body for storing gas; and an air supply component for compressing the gas and transporting it to the air storage device for storage, and capable of controlling the gas stored in the air storage device to be provided to the combustion body.

[0038] The burner proposed in the present invention is provided with a combustion body and an air storage device which is connected to the combustion body and supplies gas to the combustion body. The present invention is also provided with an air supply assembly to compress the gas and supply it to the air storage device for storage, and can control the gas stored in the air storage device to be provided to the combustion body. Therefore, during the operation of the burner body, the air required for the combustion of the combustion body can be provided from the air storage device, that is, combustion can be achieved without turning on the air supply assembly, so that the user will not be disturbed by noise during the use of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0040] Figure 1 This is a schematic structural diagram of an embodiment of a burner of the present invention;

[0041] Figure 2 A schematic structural diagram of an embodiment of a burner according to the present invention having two combustion chambers and a heat exchanger;

[0042] Figure 3 This is a structural diagram of an embodiment of the burner of the present invention further provided with an electronic control component;

[0043] Figure 4 This is a structural diagram of an embodiment of the burner of the present invention further provided with a gas supply assembly;

[0044] Figure 5 This is a schematic diagram of the specific structure of an embodiment of the burner air supply assembly and the gas supply assembly of the present invention;

[0045] Figure 6 A schematic diagram of the specific structure of another embodiment of the burner air supply assembly and the gas supply assembly of the present invention;

[0046] Figure 7 The burner of the present invention is also provided with a premixer.

[0047] Figure 8 This is a schematic diagram of the specific structure of another embodiment of the burner of the present invention that is further provided with a premixer.

[0048] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0049] Description of Figure Numbers:

[0050] Label name Label name 10 Combustion body 51 First gas valve 11 First combustion chamber 52 Second gas valve 12 First combustion chamber 53 Gas pressure regulating device 20 Air storage device 51 First premixer 30 Air supply components 52 Second premixer 31 Booster 53 Full premixer 32 The first pressure regulating device 70 Electronic control components 33 Second pressure regulating device 70 heat exchanger 40 Gas delivery components DETAILED DESCRIPTION

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0052] The purpose of the present invention is to utilize the characteristics of high-temperature air combustion to design a new type of burner and apply it to gas water heaters, so that the gas water heaters can effectively reduce the emission of pollutants (CO and NOx) and reduce the noise of the gas water heaters.

[0053] The present invention proposes a burner suitable for gas water heaters and related products and equipment including gas wall-mounted boilers that use gas combustion to generate high-temperature hot water for home bathing and heating. For ease of understanding, the following application to gas water heaters is taken as an example.

[0054] Reference Figures 1 to 8 In one embodiment of the present invention, the burner provided by the present invention includes:

[0055] Combustion body 10;

[0056] an air storage device 20, connected to the combustion body 10, for storing gas; and

[0057] The air supply assembly 30 is used to compress the gas and deliver it to the air storage device 20 for storage, and can control the gas stored in the air storage device 20 to be provided to the combustion body 10.

[0058] In some embodiments, the burner further includes an electronic control component 50, which is electrically connected to the air supply component 30 and the air storage device 20. The electronic control component 50 is used to control the air supply component 30 to store air in the air storage device 20 when the preliminary air storage instruction is triggered. The electronic control component 50 is electrically connected to the air supply component 30 to control the air supply component to supply gas to the first combustion chamber 11 and the second combustion chamber 12 respectively, and to control the flow rate of the gas supplied to the second combustion chamber 12, so that the gas is heated to a preset target temperature in the first combustion chamber 11 and then supplied to the second combustion chamber 12 for high-temperature air combustion.

[0059] In this embodiment, the combustion body 10 includes a shell, which is formed with a first combustion chamber 11 and a second combustion chamber 12 in sequence, and a smoke exhaust port is also provided on the shell; a preheating burner is installed in the first combustion chamber 11; a heat exchanger 70 is located between the smoke exhaust port and the second combustion chamber 12; the combustion body 10 also includes a water inlet pipe for introducing water into the gas water heater, a hot water outlet pipe for providing hot water to the outside, and a smoke exhaust pipe connected to the smoke exhaust port, a gas intake pipe connected to the gas, and an intake valve, all of which can adopt existing ones and are not described in detail here. 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 backfire during the combustion process. For example, the gas water heater also includes an igniter, which is used to ignite the gas drawn from the preheating burner. The electronic control component 50 is used to control the combustion operation of the preheating burner when the gas water heater is started. The gas and air entering the first combustion chamber 11 are ignited by the preheating burner, causing the mixed gas of gas and air to burn and heat the air in the first combustion chamber 11 to form high-temperature flue gas. It can be understood that by controlling the heating temperature, the air in the first combustion chamber 11 can be heated to the target temperature, that is, the preset temperature mentioned above, so that high-temperature preheating of the air is achieved. After the high-temperature preheated high-temperature gas is sent to the second combustion chamber 12, gas is sprayed into the second combustion chamber 12, the gas combines with the high-temperature gas, and the high-temperature gas ignites the gas, realizing MILD combustion in the second combustion chamber 12. Among them, the first combustion chamber 11 is a preheating combustion chamber, and the second combustion chamber 12 is a high-temperature air combustion chamber.

[0060] The electronic control component 50 can control the air storage device 20 to deliver gas to the first combustion chamber 11 and the second combustion chamber 12 respectively, and can control the flow rate of the gas delivered to the second combustion chamber 12, so that the gas is heated to a preset target temperature in the first combustion chamber 11 and then delivered to the second combustion chamber 12 for high-temperature air combustion. In this embodiment, the electronic control component 50 includes a main controller and a drive component for driving the gas valve, air compressor, etc., such as a motor, a drive circuit, etc. The electronic control component 50 can also be provided with an inlet water temperature sensor for detecting the inlet water temperature, an outlet water temperature sensor for detecting the outlet water temperature, a flame temperature sensor for detecting the flame temperature, a flow meter for detecting the inlet water flow, etc. The above sensors are used to detect various parameters of the gas water heater during operation and output them to the main controller, so that the main controller controls the operation of the burner and preheating burner and other components according to the above parameters and the preset temperature, etc., to achieve heating.

[0061] An air inlet duct and a gas flow channel are also formed in the burner body. In some embodiments, a mixing channel may also be provided, and the mixing channel is connected to the air inlet duct and the gas flow channel respectively. Among them, the air supply component 30 is arranged in the air inlet duct. During the gas storage process, the air supply component 30 draws the air outside the burner into the air inlet duct and compresses the air to store it in the air storage device 20. In this process, the air supply component 30 can compress the air as much as possible to meet the user's usage needs. The gas storage process can be carried out before the user uses the water heater, for example, when the user goes out and stays away from the water heater, or big data analysis is performed based on the user's usage, and the user's usage habits are calculated, and the gas storage is staggered with the time when the user uses the water heater. Of course, in other embodiments, it can also be based on instructions actively triggered by the user, which is not limited here.

[0062] The air storage device 20 has a first air outlet and a second air outlet, wherein the first air outlet is used to deliver air to the first combustion chamber 11, and the second air outlet delivers air to the second combustion chamber 12. When the user is using the water heater, that is, when the burner body is working, the electronic control component 50 can control the air supply component 30 to stop working, that is, at this time, the air supply component 30 stops inhaling and compressing air from outside the burner. At this time, the air required for the combustion process of the burner body can be provided from the air storage device 20. Of course, during the operation of the burner body, the electronic control component 50 can also control the air supply component 30 to work at the same time, so that the air supply component 30 draws air outside the burner into the air inlet duct and compresses the air to store it in the air storage device 20. That is, there are three working modes between the air storage device 20 and the air supply assembly 30: a working mode in which the air supply assembly 30 is used alone for gas storage, a working mode in which the air storage device 20 is used alone to provide compressed air to the burner body, or a working mode in which the air storage device 20 and the air supply assembly 30 work simultaneously. In addition, the capacity of the air storage device 20 can be set according to the actual needs of the user. For example, when the user uses hot water more frequently, the capacity of the air storage device 20 can be set to a larger capacity, and vice versa. Alternatively, it can be set according to the frequency of user use. For example, the air storage device 20 can be used to store only the amount of gas that the user will use once in advance, or it can be used to store the amount of gas for two or more uses. Among them, the preparatory gas storage instruction setting instruction can be any one or a combination of a timed on / off gas supply instruction, an ambient light on / off gas supply instruction, a button-triggered on / off gas supply instruction, and a remote on / off gas supply instruction. For example, when setting the timed on / off air supply instruction function, the user can set the opening time, closing time, and set duration of the air storage device 20 and the air supply component 30 through a mobile terminal (remote control, mobile phone, smart bracelet, smart watch, tablet computer), and then send the corresponding control instruction to the burner through the mobile terminal. The user selects the timing time through the operation button set on the burner housing, sets the opening time, closing time, and set duration of the air storage device 20 and the air supply component 30. When controlling through the ambient light on / off air supply instruction, it can be determined whether it is daytime, nighttime, user rest time, etc., and the opening / closing is determined according to the ambient light signal. In the remote on / off air supply instruction, the user can control the opening / closing of the air storage device 20 and the air supply component 30 through a mobile terminal, APP, etc.When the automatic on / off setting conditions are met, the main controller and other circuit modules and components in the burner configure corresponding parameters according to the preparatory gas storage instructions, such as the time when the air supply component 30 and the air storage device 20 start working, the time when the work ends, and the different delivery gas pressures in each stage, and their duration, etc., to respond to the preparatory gas storage function set by the user and realize intelligent control of the burner.

[0063] The burner proposed in the present invention is provided with a combustion body 10, and an air storage device 20 which is connected to the combustion body 10 and supplies gas to the combustion body 10. The present invention is also provided with an air supply component 30 to compress the gas and supply it to the air storage device 20 for storage, and can control the gas stored in the air storage device 20 to be provided to the combustion body 10, so that during the operation of the burner body, the air required for the combustion of the combustion body 10 can be provided from the air storage device 20, that is, combustion can be achieved without turning on the air supply component 30, so that the user will not be disturbed by noise during the use of the water heater.

[0064] It should be noted that achieving MILD combustion requires certain conditions for achieving high-temperature air combustion: The oxygen concentration in most areas of the furnace must be kept below a certain value, generally below 5% to 10%, to ensure complete combustion and uniform combustion of the gas. Furthermore, the temperature must be above the fuel's autoignition point to maintain spontaneous combustion. Furthermore, the following conditions must be met: high-temperature preheated air combined with a high-speed jet is the primary method for achieving high-temperature air combustion; entraining high-temperature flue gas and diluting the fuel air jet is a key technical approach for maintaining high-temperature air combustion. To achieve MILD combustion within the water heater's combustion chamber, preheating the MILD intake air and increasing its velocity are crucial. Existing fully premixed gas water heaters use a fan to draw in air, mix it with the gas, and then inject it into the combustion chamber. Existing atmospheric gas water heaters use forced extraction methods to draw air through the gas and then inject it into the combustion chamber, while forced blast methods use a fan to draw air and then inject it separately into the combustion chamber. The air distribution methods used by several existing gas water heaters often result in air speeds entering the combustion chamber that do not exceed 2 m / s, which cannot achieve the high-speed jet conditions required for MILD combustion.

[0065] Reference Figure 5 or Figure 6 To this end, the air supply assembly 30 includes:

[0066] The boosting device 31 has an inlet for receiving air, and the boosting device 31 is connected to the inlet of the air storage device 20 . The boosting device 31 is used to compress the received air and output it to the air storage device 20 .

[0067] To this end, the boosting device 31 is an air compressor. By controlling the operation of the boosting device 31, the total amount of air sucked into the first combustion chamber 11 and the second combustion chamber 12 can be controlled.

[0068] In this embodiment, the air compressor can pressurize the air output by the supercharging device 31 , thereby increasing the air jet velocity output to the second combustion chamber 12 .

[0069] During the operation of the burner, the boosting device 31 delivers gas to the first combustion chamber 11 and the second combustion chamber 12 respectively, and when delivering gas to the second combustion chamber 12, the pressure of the gas delivered to the second combustion chamber 12 can be adjusted, thereby increasing the gas pressure delivered to the second combustion chamber 12, and then ensuring that the controlled gas jet speed can meet the MILD combustion conditions. When the gas is sprayed into the second combustion chamber 12, the gas combines with the high-temperature gas, and the high-temperature gas ignites the gas, realizing MILD combustion in the second combustion chamber 12. Since the pressurized gas is delivered to the second combustion chamber 12 by the boosting device 31, the gas delivered from the second combustion chamber 12 is in a high-speed jet state, meeting the MILD combustion requirements. A suction effect is formed in the second combustion chamber 12, forming a jet combustion zone and a flue gas recirculation zone in the second combustion chamber 12, causing some high-temperature flue gas (exhaust gas rich in N2 and CO2) to circulate strongly within the second combustion chamber 12 to dilute the reactants, and then fully dilute the injected fuel gas with air to form a lower oxygen concentration, reducing the combustion reaction rate, and maintaining a high temperature in the second combustion chamber 12 to ensure that the temperature is higher than the auto-ignition point of the fuel, achieving auto-ignition, and thus achieving high-temperature air combustion. During MILD combustion, the electronic control component 50 can also control the preheat burner to stop working when the temperature of the MILD burner reaches above the MILD combustion ignition temperature.

[0070] This embodiment preheats the air at high temperatures and pressurizes the gas with a booster device 31, transforming the gas into a high-speed jet. This entrains and dilutes the high-temperature flue gas, ensuring uniform mixing of the gas and air in the second combustion chamber 12. This balances the oxygen concentration in the second combustion chamber 12 and keeps it below a certain value. This ensures that the gas is fully burned, thus reducing pollutant emissions. Furthermore, combustion is uniform within the second combustion chamber 12, preventing localized excessive combustion and noise. Furthermore, high-speed jet entrainment also enables the recirculation of high-temperature flue gas, maintaining the temperature in the second combustion chamber 12 above the auto-ignition point of the fuel. Combustion can be sustained as long as the gas is continuously fed. The heat from combustion can be exchanged with the heat exchanger 70 of the gas water heater to produce hot water. In this embodiment, the air fed by the booster device 31 is boosted to increase the gas flow rate output to the second combustion chamber 12, thereby increasing the jet velocity of the MILD intake air, meeting MILD combustion requirements, and reducing CO and NOx emissions.

[0071] It should be noted that the target temperature of the high-temperature preheated air cannot be too low, and should be as high as possible not lower than 700 degrees Celsius. Generally, controlling it between 700 and 1200 degrees Celsius can ensure that when the high-temperature gas contacts the gas in the second combustion chamber 12, it can achieve good automatic combustion, and no ignition is required. Among them, the target temperature can be achieved by controlling the heating time, controlling the ratio of gas to air, maintaining heat, and increasing the residence time of the high-temperature gas in the first combustion chamber 11. The injection speed of the gas delivered by the booster device 31 to the second combustion chamber 12 can be adjusted according to demand. Specifically, it can be adjusted according to the preset temperature, ambient temperature, water inlet flow rate, water outlet temperature, ambient pressure, etc. The adjustment ratio and process can be predetermined and set through experiments. Therefore, the jet velocity of the second combustion chamber 12 can be adjusted by controlling the pressure of the gas delivered to the second combustion chamber 12. By adjusting the jet velocity, the high-temperature flue gas can be entrained and the fuel / air jet can be diluted, thereby maintaining high-temperature air combustion.

[0072] It is understood that in this embodiment, the boosting device 31 can deliver pressurized air to the second combustion chamber 12. Alternatively, a pressurized mixture of gas and air can be delivered to the second combustion chamber 12, that is, the gas and air are first mixed, then pressurized, and then delivered to the second combustion chamber 12. Alternatively, the air and gas can be pressurized separately and then delivered to the second combustion chamber 12 through the air pipe and gas pipe, respectively. When the gas and air are first mixed, a premixer can be used to achieve this. The premixer is arranged in the combustion chamber, for example, it can be arranged in the first combustion chamber 11 or the second combustion chamber 12. Since the premixer provides a mixed gas containing gas and air, the preheating burner ignites and burns the mixed gas, realizing high-temperature preheated air. Then, by pressurizing the mixed gas, a jet gas with a certain jet velocity is formed to cooperate to produce an entrainment effect, so that the high-temperature flue gas refluxes. On the one hand, heat preservation is achieved so that the temperature is higher than the auto-ignition point of the fuel, so that the gas in the combustion chamber can self-ignite. On the other hand, the air is diluted by jet entrainment, so that the oxygen concentration is lower than a certain value, achieving uniform combustion. In this way, high-temperature air combustion occurs in the combustion chamber, which can meet the MILD combustion requirements and reduce CO and NOx emissions. In other words, the technical solution of this embodiment is conducive to achieving these two conditions at the same time and smoothly realizing high-temperature air combustion. Furthermore, the structure of this burner frame can miniaturize the components that achieve high-temperature air combustion, allowing for greater application space and value. Furthermore, due to its low noise, complete combustion, and low exhaust gas pollution, it not only meets the requirements when applied 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 home bathing and heating, but also achieves the effects of complete combustion and low pollutant emissions that are not available in existing water heater burners. This embodiment pressurizes the air through a booster device 31 to meet the MILD combustion requirements, eliminating the need for a fan. This allows the air storage device 20 and the air delivery component 30 to operate simultaneously without disturbing the user with noise.

[0073] Reference Figure 5 or Figure 6 In one embodiment, the combustion body 10 has a first combustion chamber 11 and a second combustion chamber 12 that are interconnected;

[0074] The air storage device 20 has a first air outlet and a second air outlet, the first air outlet is connected to the first combustion chamber 11, and the second air outlet is connected to the second combustion chamber 12; the air supply component 30 also includes

[0075] The first pressure regulating device 32 , the supercharging device 31 and the first pressure regulating device 32 are sequentially arranged between the second outlet of the air storage device 20 and the second combustion chamber 12 .

[0076] In this embodiment, the second pressure regulating device 33 can be a pressure regulating valve. After the air compressor pressurizes the air, the pressure regulating valve can further increase or appropriately reduce the pressure of the air output to the second combustion chamber 12 according to the needs of actual application, thereby controlling the intake air entering the second combustion chamber 12 to reach the speed required for MILD combustion during MILD combustion.

[0077] Reference Figure 5 or Figure 6 In one embodiment, the air supply assembly 30 further includes:

[0078] A second pressure regulating device 33, the second pressure regulating device 33 is arranged in series between the first air outlet and the air storage device 20; or, the second pressure regulating device 33 is arranged in series between the second air outlet and the second combustion chamber 12;

[0079] The second pressure regulating device 33 is used to regulate the air flow delivered to the first combustion chamber 11 and the second combustion chamber 12 .

[0080] In this embodiment, the second pressure regulating device 33 may be a pressure reducing valve, which can be used to regulate the air flow rate at the first and second air outlets. By adjusting the opening of the pressure reducing valve, the ratio of air flow delivered to the first combustion chamber 11 and the second combustion chamber 12 can be adjusted. For example, when the pressure reducing valve is located between the first air outlet and the first combustion chamber 11, increasing the opening of the pressure reducing valve increases the proportion of air delivered to the first combustion chamber 11 and decreases the proportion of air delivered to the second combustion chamber 12. This ensures that the air flow delivered to the first and second combustion chambers 11 and 12 meets the requirements of preheating combustion in the first combustion chamber 11 and high-temperature air combustion in the second combustion chamber 12. For example, during preheating combustion, all air output from the supercharging device 31 can be delivered to the first combustion chamber 11. During MIILD combustion, when the preheating burner is controlled to stop operation, all air output from the supercharging device 31 can be delivered to the second combustion chamber 12. Furthermore, by providing a pressure reducing valve, the air flow rate delivered to the first combustion chamber 11 can be reduced, thereby ensuring that the air delivered to the first combustion chamber meets the requirements of preheating combustion.

[0081] Reference Figures 4 to 6 In one embodiment, the burner further comprises:

[0082] The gas delivery assembly 50 is used to deliver gas to the combustion body 10 and can control the flow rate of the gas delivered to the combustion body 10.

[0083] In this embodiment, by controlling the operation of the gas delivery assembly 50, the gas jet velocity delivered to the second combustion chamber 12 can also be increased, thereby meeting the MILD combustion requirements and reducing CO and NOx emissions.

[0084] Reference Figure 5 or Figure 6 In one embodiment, the combustion body 10 has a first combustion chamber 11 and a second combustion chamber 12 that are interconnected;

[0085] The gas delivery assembly 50 includes:

[0086] A first gas valve 51 has a first gas outlet and a second gas outlet, wherein the first gas outlet is connected to the first combustion chamber 11 and is used to deliver gas to the first combustion chamber 11;

[0087] The second gas outlet is connected to the second combustion chamber 12 and is used to deliver gas to the second combustion chamber 12 .

[0088] In this embodiment, the first gas valve 51 is used to control the gas flow delivered to the first combustion chamber 11 and the second combustion chamber 12. The opening of the first gas valve 51 can be adjusted based on actual application conditions, such as a preset temperature and water inlet temperature, to ensure that the gas water heater can provide a corresponding gas flow during operation, achieving preheating combustion, mild combustion, and other functions. For example, when the gas water heater begins operation, the opening of the first gas valve 51 is controlled to reach the ignition opening. A flame detector then detects the presence of a flame. If a flame is present, ignition is successful. The opening of the first gas valve 51 is then adjusted to ensure that the gas flow rate entering the first combustion chamber 11 meets the requirements for preheating combustion and begins heating the cold water. Furthermore, the heat load required to heat the water from the inlet temperature to the preset temperature can be calculated based on the water inlet temperature, water flow rate, and preset temperature. The opening of the first gas valve 51 is then adjusted based on the heat load to ensure that the gas flow rates delivered to the first combustion chamber 11 and the second combustion chamber 12 maintain the water outlet temperature consistent with the preset temperature.

[0089] Reference Figure 5 or Figure 6 In one embodiment, the gas supply assembly 50 further includes:

[0090] A second gas valve 52, the second gas valve 52 is arranged in series between the first gas outlet and the first combustion chamber 11; or, the second gas valve 52 is arranged in series between the second gas outlet and the second combustion chamber 12;

[0091] The second gas valve 52 is used to adjust the gas flow delivered to the first combustion chamber 11 and the second combustion chamber 12 .

[0092] In this embodiment, the second gas valve 52 can be located between the first gas outlet and the first combustion chamber 11, or it can be located in series between the second gas outlet and the second combustion chamber 12. By adjusting the opening of the second gas valve 52, the ratio of gas flow delivered to the first and second combustion chambers 11 and 12 can be adjusted. For example, when the pressure reducing valve is located between the first gas outlet and the first combustion chamber 11, increasing the opening of the second gas valve 52 increases the proportion of air delivered to the first combustion chamber 11 and decreases the proportion of air delivered to the second combustion chamber 12. Conversely, decreasing the opening of the second gas valve 52 decreases the proportion of air delivered to the first combustion chamber 11 and increases the proportion of air delivered to the second combustion chamber 12. Similarly, when the pressure reducing valve is located between the second gas outlet and the second combustion chamber 12, the ratio of air flow between the first and second combustion chambers 11 and 12 can also be adjusted. This allows the flow rates at the first and second air outlets to be adjusted, thereby distributing the flow rates delivered to the first and second combustion chambers 11 and 12 to meet the needs of preheating combustion or high-temperature air combustion. For example, when performing preheating combustion, the air output by the boosting device 31 can be output to the first combustion chamber 11. When performing MIILD combustion and controlling the preheating burner to stop working, the air output by the boosting device 31 can be output to the second combustion chamber 12.

[0093] Reference Figure 6 In one embodiment, the gas delivery assembly 50 includes:

[0094] The gas pressure regulating device 53 has an inlet connected to the second air outlet of the blower, and an outlet connected to the second combustion chamber 12 . The gas pressure regulating device is used to control the gas flow rate delivered to the second combustion chamber 12 .

[0095] To achieve MILD combustion within the combustion chamber of the water heater, this embodiment uses a gas pressure regulating valve to pressurize the gas output from the second gas outlet, thereby increasing the gas flow rate output to the second combustion chamber 12 and the jet velocity of the MILD intake air, thereby meeting MILD combustion requirements and reducing CO and NOx emissions. It will be understood that the first gas pressure regulating device and the gas pressure regulating valve respectively regulate the pressures of the air and gas output to the second combustion chamber 12 to increase the jet velocity of the MILD intake air. In actual applications, the burner may be provided with both the first gas pressure regulating device and the gas pressure regulating valve, or with either the first gas pressure regulating device or the gas pressure regulating valve. By controlling the first gas pressure regulating device and the gas pressure regulating valve to adjust the intake air pressure, the velocity of the MILD intake air can be controlled to achieve MILD combustion within the second combustion chamber 12.

[0096] In some embodiments, a combustion chamber can be formed on the shell, and the corresponding air storage device 20 has an air outlet, which is connected to the combustion chamber. The gas supply component 50 has a gas outlet, which is connected to the combustion chamber. The air supply component 30 compresses the gas and transports it to the air storage device 20 for storage, and can control the air storage device 20 to provide the stored gas to the combustion chamber through the air outlet. The gas supply component 50 also provides gas to the combustion chamber through the gas outlet. Therefore, during the operation of the gas water heater, the air required for the combustion of the combustion body 10 can be provided from the air storage device 20, that is, combustion can be achieved without turning on the air supply component 30, so that the user will not be disturbed by noise during the use of the water heater. The gas supply assembly 50, air supply assembly 30 and air storage device 20 of the embodiment of the present invention are suitable for non-MILD combustion burners, such as catalytic burners, or ordinary burners (only one combustion chamber is provided), etc. When used in the above-mentioned burners, the functions of the gas supply assembly 50, air supply assembly 30 and air storage device 20 can also be adaptively adjusted. For example, the air storage device 20 and the gas supply assembly 50 can be provided with one or more outlets as needed. The gas supply assembly 50 and the air supply assembly 30 can also adjust the pressure and flow of the output gas / air according to the needs of actual applications to meet the combustion conditions of the corresponding burner.

[0097] Reference Figure 7 In one embodiment, the burner further comprises:

[0098] Gas pipes; and,

[0099] The premixer (not shown) is used to premix the air received from the air storage device 20 and the gas received from the gas pipe, and provide the mixed gas to the gas body.

[0100] In this embodiment, there may be two premixers, namely a first premixer 61 and a second premixer, wherein the first premixer 61 is used to premix the air introduced from the first air outlet and the gas introduced from the gas pipe, and provide the mixed gas to the first combustion chamber 11. The first premixer 61 is disposed in the first combustion chamber 11. Since the mixed gas containing gas and air is provided by the first premixer 61, the mixed gas is output to the first combustion chamber 11, so that the preheating burner ignites and burns the mixed gas, thereby achieving high-temperature preheating of the air.

[0101] The second premixer 62 is used to premix the air received from the second air outlet and the gas received from the gas pipe, and provide the mixed gas to the first combustion chamber 11. The second premixer 62 is arranged in the second combustion chamber 12. Since the mixed gas containing gas and air is provided by the second premixer 62, the mixed gas is output to the second combustion chamber 12, and the mixed gas delivered to the second combustion chamber 12 is pressurized by the burner to form a jet gas with a certain jet velocity to cooperate to produce an entrainment effect, so that the high-temperature flue gas refluxes. On the one hand, it achieves heat preservation so that the temperature is higher than the auto-ignition point of the fuel, so that the gas in the combustion chamber can self-ignite. On the other hand, the air is diluted by jet entrainment so that the oxygen concentration is lower than a certain value, thereby achieving uniform combustion. In this way, high-temperature air combustion occurs in the combustion chamber, which can meet the MILD combustion requirements and reduce CO and NOx emissions.

[0102] It is understandable that in the above embodiment, the gases output to the first combustion chamber 11 and the second combustion chamber 12 can be premixed separately, or the total air and gas can be mixed, that is, a full premixer is set up, and the mixed gas is delivered to the first combustion chamber 11 and the second combustion chamber 12 respectively through the above burner, that is, full premixing is achieved. The specific configuration can be adapted according to the needs of the actual application and the premise of ensuring MILD combustion, and is not limited here. When full premixing is performed, in order to facilitate the mixing of gases, a mixed gas distribution chamber can be set or formed in the preheating burner, the air inlet of the mixed gas distribution chamber is connected to the full premixer, and the air outlet of the mixed gas distribution chamber is connected to the first combustion chamber 11 and the second combustion chamber 12, so as to distribute the mixed gas delivered to the first combustion chamber 11 and the second combustion chamber 12 for ignition.

[0103] Reference Figure 8 It can be understood that in the above embodiment, the gases output to the first combustion chamber 11 and the second combustion chamber 12 can be premixed respectively, or the total air and gas can be mixed, that is, a full premixer 63 is set, and the mixed gas is delivered to the first combustion chamber 11 and the second combustion chamber 12 respectively through the above-mentioned air supply component 20, that is, full premixing is achieved. The specific configuration can be adapted according to the needs of actual applications and under the premise of ensuring MILD combustion, and is not limited here.

[0104] When performing full premixing, in order to facilitate gas mixing, a mixed gas distribution chamber can be set or formed in the preheating burner. The air inlet of the mixed gas distribution chamber is connected to the full premixer 63, and the air outlet of the mixed gas distribution chamber is connected to the first combustion chamber 11 and the second combustion chamber 12, so as to distribute the mixed gas delivered to the first combustion chamber 11 and the second combustion chamber 12 for ignition. The full premixer 63 mixes the incoming air and gas and outputs them to the first combustion chamber 11 and the second combustion chamber 12 respectively. In addition, when performing full premixing, as shown in FIG. Figure 5 As shown, the full premixer 63 is connected to the two outlets of the air supply assembly 20, and the two outlets of the full premixer 63 are connected to the first combustion chamber 11 and the second combustion chamber 12 respectively. The air and / or gas received by the full premixer 63 is pressurized gas, that is, the air supply assembly 20 first pressurizes the air and / or gas and then outputs it to the full premixer 63, and the full premixer 63 mixes the pressurized gas. Of course, in other embodiments, the air and gas can also be mixed by the full premixer 63 and the mixed gas can be output to the air supply assembly 20, and the air supply assembly 20 can then pressurize the mixed gas.

[0105] In one embodiment, the burner further comprises:

[0106] The heat exchanger 70 has one end connected to the cold water inlet pipe and the other end connected to the hot water outlet pipe. The heat exchanger 70 is used to absorb the heat generated by the combustion in the first combustion chamber 11 and the combustion in the second combustion chamber 12 and exchange the absorbed heat with the water inside the heat exchanger 70.

[0107] In this embodiment, the cold water inlet pipe is used to introduce cold water from the outside into the gas water heater and send the cold water into the heat exchanger 70. The heat exchanger 70 absorbs the heat generated by the combustion of the preheating burner and the MILD combustion and heats the cold water into hot water. The hot water is led out of the gas water heater through the hot water outlet pipe.

[0108] The present invention further provides a gas water heater. In one embodiment, the gas water heater includes a heat exchanger and a burner. The heat exchanger produces hot water through the heat generated by the burner.

[0109] The detailed structure of the burner can be referred to the above embodiment and will not be repeated here. It can be understood that since the above burner is used in the gas water heater of the present invention, the embodiments of the gas water heater of the present invention include all technical solutions of all embodiments of the above burner, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0110] 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 transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A burner, characterized in that: The burner comprises: combustion subject; an air storage device, connected to the combustion body, for storing gas; and An air delivery assembly, used for compressing the gas and delivering it to the air storage device for storage, and capable of controlling the gas stored in the air storage device to be provided to the combustion body; The air required for the combustion process of the burner body is provided from the air storage device; there are three working modes between the air storage device and the air supply component: a working mode in which the air supply component is used solely for air storage work, a working mode in which the air storage device is used solely for providing compressed air to the burner body, and a working mode in which the air storage device and the air supply component work simultaneously.

2. The burner according to claim 1, wherein The air supply assembly comprises: A boosting device, the inlet of the boosting device is used to receive air, the boosting device is connected to the inlet of the air storage device, and the boosting device is used to compress the received air and output it to the air storage device.

3. The burner according to claim 2, characterized in that The boosting device is an air compressor.

4. The burner according to claim 2, wherein The combustion body has a first combustion chamber and a second combustion chamber that are interconnected; The air storage device has a first air outlet and a second air outlet, the first air outlet is connected to the first combustion chamber, and the second air outlet is connected to the second combustion chamber; The air supply assembly further comprises: A first pressure regulating device is provided between the second outlet of the air storage device and the second combustion chamber.

5. The burner according to claim 4, characterized in that The air supply assembly further comprises: a second pressure regulating device, the second pressure regulating device being arranged in series between the first air outlet and the air storage device; or the second pressure regulating device being arranged in series between the second air outlet and the second combustion chamber; The second pressure regulating device is used to regulate the air flow delivered to the first combustion chamber and the second combustion chamber.

6. The burner according to claim 1, wherein The burner also includes: The gas delivery assembly is used to deliver gas to the combustion body and can control the flow rate of the gas delivered to the combustion body.

7. The burner according to claim 6, characterized in that The combustion body has a first combustion chamber and a second combustion chamber that are interconnected; The gas supply assembly comprises: a first gas valve having a first gas outlet and a second gas outlet, wherein the first gas outlet is connected to the first combustion chamber and is used to deliver gas to the first combustion chamber; The second gas outlet is connected to the second combustion chamber and is used to deliver gas to the second combustion chamber.

8. The burner according to claim 7, wherein The burner also includes: An electronic control component is electrically connected to the air supply component and the air storage device, and is used to control the air storage device to deliver gas to the first combustion chamber and the second combustion chamber respectively, and to control the flow rate of the gas delivered to the second combustion chamber, so that the gas is heated to a preset target temperature in the first combustion chamber and then delivered to the second combustion chamber for high-temperature air combustion.

9. The burner according to claim 7, wherein The gas supply assembly further comprises: a second gas valve, the second gas valve being arranged in series between the first gas outlet and the first combustion chamber; or the second gas valve being arranged in series between the second gas outlet and the second combustion chamber; The second gas valve is used to adjust the gas flow delivered to the first combustion chamber and the second combustion chamber.

10. The burner according to claim 7, wherein The gas supply assembly comprises: A gas pressure regulating device, wherein the inlet of the gas pressure regulating device is connected to the second gas outlet of the first gas valve, and the outlet of the gas pressure regulating device is connected to the second combustion chamber, and the gas pressure regulating device is used to control the gas flow rate delivered to the second combustion chamber.

11. The burner according to claim 1, wherein The burner also includes: Gas pipes; and, The mixer is used to pre-mix the air received from the air storage device and the gas received from the gas pipe, and provide the mixed gas to the combustion body.

12. The burner according to claim 1, wherein The combustion body has a first combustion chamber and a second combustion chamber that are interconnected; wherein, The first combustion chamber is a preheating combustion chamber, and the second combustion chamber is a high-temperature air combustion chamber.

13. The burner according to any one of claims 1 to 12, characterized in that: The burner also includes: A heat exchanger, one end of which is connected to a cold water inlet pipe, and the other end of which is connected to a hot water outlet pipe. The heat exchanger is used to absorb the heat generated by the combustion in the first combustion chamber and the second combustion chamber of the combustion body and to exchange the absorbed heat with the water inside the heat exchanger.

14. A gas water heater, characterized in that: Comprising the burner according to any one of claims 1 to 13.

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