Combustor and water heater

Abstract

The application discloses a burner and a water heater, wherein the burner comprises a shell, a combustion chamber is formed in the shell, a nozzle is arranged on the shell and used for spraying gas into the combustion chamber, a heat conduction pipe is arranged on a side surface of the shell towards the combustion chamber, and a heat conduction member is arranged between the nozzle and the heat conduction pipe and used for guiding heat of the nozzle to the heat conduction pipe. The application realizes continuous cooling of the nozzle by arranging the heat conduction pipe on the shell, guiding heat on the nozzle to the heat conduction pipe through the heat conduction member, taking out heat outside the burner by flowing cold water in the heat conduction pipe, preventing the problem of too large gas flow rate caused by too high temperature of the nozzle, and avoiding the phenomenon of re-tempering of the nozzle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water heaters, in particular to a burner and a water heater. BACKGROUND

[0002] The structure of the heat exchanger in the gas water heater not only affects the thermal efficiency of the gas water heater, but also affects whether the gas combustion is sufficient. The existing heat exchanger includes a preheating coil arranged outside the flue and a heat exchange pipe arranged at the upper part of the flue. The water in the heat exchange pipe exchanges heat with the high-temperature flue gas at the upper part of the flue to become hot water for use by the user. The nozzle sprays gas into the combustion chamber, and the mixed gas burns at high temperature. After a long period of operation, the temperature of the nozzle gradually rises in the high-temperature environment, causing the nozzle to spray gas to form a flame with high burning speed. When the nozzle is overheated, backfire occurs, affecting the normal operation of the burner. SUMMARY

[0003] The main purpose of the present application is to provide a burner and a water heater, which aims to improve the problem of overheating of the burner nozzle.

[0004] To achieve the above-mentioned purpose, the burner provided by the present application is used in a water heater, and the burner comprises:

[0005] A shell, wherein a combustion chamber is formed inside the shell;

[0006] A nozzle, which is arranged on the shell and is used for spraying gas into the combustion chamber;

[0007] A heat conduction pipe, which is arranged on one side surface of the shell facing the combustion chamber; and

[0008] A heat conduction member, which is arranged between the nozzle and the heat conduction pipe and is used for guiding the heat of the nozzle to the heat conduction pipe.

[0009] Optionally, the heat conduction member comprises:

[0010] A heat conduction part, which is attached to the outer wall of the nozzle; and

[0011] A connecting part, which is connected with the heat conduction part, and one end of the connecting part away from the heat conduction part is connected with the heat conduction pipe.

[0012] Optionally, the heat conduction part is annular, and the heat conduction part is sleeved on the outer wall of the nozzle.

[0013] Optionally, the heat conduction member further comprises:

[0014] A heat exchange fin, which is arranged on the surface of the heat conduction pipe, and one end of the connecting part away from the heat conduction part is connected with the heat exchange fin.

[0015] Optionally, the heat exchange fins are arranged at intervals, and the connecting part is inserted between adjacent heat exchange fins away from the heat conduction part.

[0016] Optionally, the burner further comprises a fixed plate, and the connecting part is clamped between the fixed plate and the inner wall of the shell.

[0017] Optionally, the fixed plate is provided with a protruding part on one side facing the connecting part, the protruding part is arranged at intervals along the length direction of the fixed plate, and the protruding part is clamped between the connecting part and the heat exchange fin.

[0018] Optionally, the heat dissipation fin comprises a first heat exchange section and a second heat exchange section, the first heat exchange section is in an arc-shaped structure, the first heat exchange section is attached to the surface of the heat conduction pipe, and the second heat exchange section is connected with the connecting part.

[0019] Optionally, the shell is recessed with a clamping groove on one side facing the combustion chamber, and the heat conduction pipe is arranged in the clamping groove.

[0020] Optionally, the number of the nozzles is plural, the number of the heat conduction parts is plural, and the plural heat conduction parts are arranged one-to-one corresponding to the plural nozzles.

[0021] Optionally, the number of the heat conduction pipes is two, the two heat conduction pipes are arranged on two sides of the nozzle respectively, and the two heat conduction pipes are communicated with each other.

[0022] Optionally, the burner further comprises:

[0023] a pre-heater, which is used for pre-heating gas to a target temperature and then delivering the gas to the combustion chamber;

[0024] wherein the gas and / or air are injected into the combustion chamber through the nozzle, so that a high-temperature air combustion reaction is carried out in the combustion chamber.

[0025] The application further provides a water heater, which comprises:

[0026] a main body, a heat exchange cavity is formed in the main body;

[0027] a heat exchange pipe arranged in the heat exchange cavity; and

[0028] a burner as described above, which is arranged on the main body, and the combustion chamber of the burner is communicated with the heat exchange cavity.

[0029] Optionally, the heat conduction pipe of the burner has a water inlet and a water outlet, the heat exchange pipe has a cold water inlet and a hot water outlet, and the water outlet of the heat conduction pipe is communicated with the cold water inlet of the heat exchange pipe.

[0030] Optionally, the heat exchange pipe is coiled in a serpentine shape in the heat exchange cavity.

[0031] The technical scheme of the present application realizes continuous cooling of the nozzle by arranging the heat pipe on the shell, guiding the heat on the nozzle to the heat pipe through the heat guide, and taking the heat out of the burner by the cold water flowing in the heat pipe, so as to prevent the problem of excessive air flow rate caused by the excessively high temperature of the nozzle, and further avoid the phenomenon of retempering of the nozzle. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0033] Figure 1 Structure diagram of an embodiment of the nozzle of the burner of the present application;

[0034] Figure 2 Explosion diagram of Figure 1

[0035] Structure diagram of an embodiment of the water heater of the present application; Figure 3

[0036] Structure diagram of an embodiment of the internal structure of the water heater of the present application. Figure 4 Explanation of reference numerals:

[0037]

[0038]

[0039]

[0040] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0042] ​It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0044] The present application provides a burner for a water heater, especially suitable for a gas water heater using high-temperature air combustion and other related products and equipment using gas combustion to generate high-temperature hot water for household bathing and heating, etc. For the convenience of understanding, the application is taken as an example of application in a water heater.

[0045] In an embodiment, the burner comprises a housing 20, a combustion chamber 22 formed inside the housing 20, a nozzle 21 arranged on the housing 20 for injecting gas into the combustion chamber 22, a heat-conducting pipe 30 arranged on a side surface of the housing 20 facing the combustion chamber 22, and a heat-conducting member 40 arranged between the nozzle 21 and the heat-conducting pipe 30 for guiding heat of the nozzle 21 to the heat-conducting pipe 30.

[0046] The nozzle 21 is used to inject gas into the combustion chamber 22 to form a flame by combustion. The housing 20 forms the combustion chamber 22 inside, which provides a space for the gas injected by the nozzle 21 to burn. When the gas injected by the nozzle 21 burns, a high-temperature state is formed in the combustion chamber 22, and the high-temperature flue gas formed in the combustion chamber 22 can be used to heat other equipment to achieve heat exchange. The burner is used in a water heater, and the high-temperature flue gas formed by combustion in the combustion chamber 22 exchanges heat with the heat exchange pipe of the water heater to heat the water in the heat exchange pipe, form hot water, and output.

[0047] The heat pipe 30 and the nozzle 21 are arranged in the combustion chamber 22 and close to the side surface of the shell 20 towards the combustion chamber 22. The heat pipe 30 is a hollow pipe for conveying cold water or other low-temperature medium. The heat guide 40 is used to guide the heat on the nozzle 21 to the heat pipe 30 as a heat guide medium between the nozzle 21 and the heat pipe 30. The heat guide 40 is made of metal or other materials with good heat conduction performance.

[0048] The nozzle 21 is connected to an external gas path, and the nozzle 21 continuously sprays gas into the combustion chamber 22. In the high-temperature combustion state in the combustion chamber 22, the temperature of the nozzle 21 will also gradually increase. The heat guide 40 is in contact with the nozzle 21, which can directly guide the heat of the nozzle 21 to the heat pipe 30. During the flow of cold water in the heat pipe 30, the heat is gradually taken out of the combustion chamber 22, achieving continuous cooling of the nozzle 21.

[0049] Since the heat guide 40 is in direct contact with the nozzle 21 and the heat pipe 30, and the heat transfer efficiency of solids is significantly higher than that of gases, the heat guide 40 can accelerate the heat exchange between the nozzle 21 and the heat pipe 30, thereby improving the cooling efficiency of the nozzle 21. When the temperature of the nozzle 21 decreases, the molecular motion speed of the gas flow slows down, and the gas flow rate of the nozzle 21 also decreases relatively, so that the gas flow sprayed by the nozzle 21 has higher stability, and the flame formed by the gas flow is relatively more stable and less likely to have a blowout problem. By reducing the flow rate of the gas flow sprayed by the nozzle 21, the gas flow can be more fully combusted in the combustion chamber 22 when sprayed into the combustion chamber 22, thereby improving the combustion efficiency of the gas in the combustion chamber 22 and reducing the content of carbon monoxide and nitrogen oxides in the flue gas formed by the burner.

[0050] It should be noted that when applied to a gas water heater using high-temperature air combustion, since the temperature in the combustion chamber is usually above 600 degrees Celsius, the use of the heat guide 40 to cool the nozzle 21 greatly improves the service life of the nozzle and greatly reduces the material requirements of the nozzle 21.

[0051] The nozzle 21 sprays gas at high speed into the combustion chamber, which can spray fuel gas or a mixture of fuel gas and air into the combustion chamber, and the combustion chamber has air for combustion of the fuel gas; or the combustion chamber has fuel gas, and the nozzle 21 sprays air or a mixture of air and fuel gas into the combustion chamber.

[0052] The heat conducting member 40 can be attached to the nozzle 21 to increase the contact area between the heat conducting member 40 and the nozzle 21. Meanwhile, the heat conducting member 40 can be attached to the surface of the shell 20 to enable the heat on the heat conducting member 40 to be evenly conducted to the heat conducting pipe 30. Since the heat conducting pipe 30 can be used to transport low-temperature medium, the heat conducting pipe 30 can be used to cool the surface of the shell 20, and the nozzle 21 is directly arranged on the surface of the shell 20, so the surface of the shell 20 can also be used as a heat conducting medium between the nozzle 21 and the heat conducting pipe 30. Since the gas in the combustion chamber 22 is combusted at a high temperature, the temperature of the side of the nozzle 21 close to the combustion chamber 22 is higher than the temperature of the side of the nozzle 21 away from the combustion chamber 22, and the surface of the shell 20 can be used to cool the end of the nozzle 21 away from the combustion chamber 22, so that when the gas flow is injected into the combustion chamber 22 through the nozzle 21, the gas flow can be slowly heated, and when the gas flow is output from the nozzle 21, the gas flow can maintain a preset injection state, thereby enabling the gas flow to be more concentratedly combusted near the middle part of the combustion chamber 22, to avoid the problem that the nozzle 21 is rapidly heated due to combustion near the nozzle 21. The shell 20 cooperates with the heat conducting member 40 to enable the gas injected by the nozzle 21 to burn in the combustion chamber 22, and the flame area formed by combustion is farther away from the nozzle 21, to prevent the nozzle 21 from being overheated.

[0053] Since the nozzle 21 is used to inject gas at a high speed, the nozzle 21 can vibrate due to the impact of the gas flow, and the heat conducting member 40 directly connects the nozzle 21 and the heat conducting pipe 30, and can stabilize the nozzle 21 to improve the stability of the nozzle 21. When the heat conducting member 40 is attached to the surface of the shell 20, the heat conducting member 40 can transmit the vibration of the nozzle 21 to the shell 20, to further improve the stability of the nozzle 21.

[0054] Optionally in the embodiment, the side of the shell 20 facing the combustion chamber 22 is recessed with a clamping groove 23, and the heat conducting pipe 30 is arranged in the clamping groove 23. The clamping groove 23 is a groove formed on the surface of the shell 20, and the shape of the clamping groove 23 is consistent with the shape of the heat conducting pipe 30, so that the heat conducting pipe 30 can be limited on the surface of the shell 20. The nozzle 21 is directly mounted on the shell 20, and there is heat exchange between the surface of the shell 20 and the nozzle 21, and the clamping groove 23 can increase the contact area between the shell 20 and the heat conducting pipe 30 to increase the heat exchange area.

[0055] When the shell 20 surface forms an inner recessed clamping groove 23, the shell 20 surface between the heat pipe 30 and the nozzle 21 can more easily form contact with the heat conduction piece 40, and the heat conduction piece 40 can quickly transfer heat to the shell 20 surface, thereby further improving the heat conduction efficiency.

[0056] Please refer to Figure 1 and Figure 2 In an embodiment, the number of nozzles 21 is multiple, and the number of heat conduction pieces 40 is multiple, and the multiple heat conduction pieces 40 are arranged one-to-one with the multiple nozzles 21. Each nozzle 21 has a heat conduction piece 40 for heat conduction, so that the multiple nozzles 21 can maintain a preset temperature state. By allowing multiple nozzles 21 to maintain a preset temperature state, the flow rate of the gas flow sprayed by multiple nozzles 21 can be maintained within a preset range, thereby making the flame formed by multiple nozzles 21 relatively stable, which helps to improve the gas combustion efficiency of the burner and reduce the emission of harmful gases.

[0057] In an embodiment, the heat pipe 30 is two, and the two heat pipes 30 are arranged on both sides of the nozzle 21, and the two heat pipes 30 are in communication with each other. The heat pipe 30 cools the nozzle 21 from different positions to maintain a relatively balanced temperature state of the nozzle 21, thereby avoiding quality problems caused by uneven temperature of the nozzle 21.

[0058] The combustion chamber 22 can be used to form a space for gas combustion. In order to improve the combustion efficiency of the gas sprayed by the nozzle 21, in an embodiment of the present application, the burner further comprises a pre-heater for preheating the gas to a target temperature and then delivering it to the combustion chamber 22; wherein the nozzle 21 sprays fuel gas and / or air into the combustion chamber 22, so that a high-temperature air combustion reaction occurs in the combustion chamber 22. The pre-heater is in communication with the combustion chamber 22 and is used to preheat the gas, so that the gas can be delivered to the combustion chamber 22 at a temperature higher than normal temperature. When the nozzle 21 sprays gas flow into the combustion chamber 22, the gas input into the combustion chamber 22 has been heated, and the heat required for the gas flow sprayed by the nozzle 21 to burn with the gas in the combustion chamber 22 is relatively reduced, which can make the combustion rate of the gas in the combustion chamber 22 faster, so that the heating speed of the water heater is faster, thereby reducing water waste.

[0059] High temperature air combustion (HTAC) is also called "moderate and intense low oxygen dilution combustion" (MILD combustion) for short. The main features of the combustion are: the chemical reaction mainly occurs in a high-temperature low-oxygen environment (the temperature is mainly 600-1200 degrees Celsius, and the oxygen concentration is 3% to 10%), the temperature of the reactants is higher than the self-ignition temperature, the maximum temperature rise during the combustion process is lower than the self-ignition temperature, and the oxygen volume fraction is diluted to a very low concentration by the combustion products, usually 3% to 10%. Compared with conventional combustion, in this combustion state, the pyrolysis of the fuel is inhibited, the flame thickness is thickened, and the flame front disappears, so that the temperature of the whole furnace is very uniform during this combustion, and the emissions of pollutants NOx and CO are greatly reduced.

[0060] The preheater or the nozzle 21 inputs combustible gas into the combustion chamber 22. For example, the preheater sprays air into the combustion chamber 22, and the nozzle 21 sprays mixed gas of fuel gas and air into the combustion chamber 22. When the nozzle 21 sprays the gas flow into the combustion chamber 22 at high speed, the high-speed incident gas flow exchanges heat with the preset gas in the combustion chamber 22, and rapid combustion is achieved. Under the action of the nozzle 21, when the gas flow sprayed by the nozzle 21 rapidly enters the combustion chamber 22, it will form an entrainment effect with the gas flow delivered by the preheater into the combustion chamber 22. The high-speed sprayed gas flow can impact the preheated gas flow in the combustion chamber 22, so that the gas flow is rapidly disturbed. The preheated gas flow can rapidly mix and burn with the fuel gas, so that the burning speed of the fuel gas is faster and the burning efficiency is higher.

[0061] In this embodiment, the nozzle 21 can be arranged on the opposite two side walls of the shell 20, so that the nozzles 21 can spray the gas flow relatively. When the gas flow is rapidly sprayed into the combustion chamber 22, the gas flow can interact with each other to make the gas flow mix more fully and the burning efficiency higher.

[0062] Please refer to Figure 2 In an embodiment of the present application, an optional structure of a heat conduction member 40 is shown, which comprises: a heat conduction part 41 attached to the outer wall of the nozzle 21; and a connecting part 42 connected with the heat conduction part 41, and the end of the connecting part 42 away from the heat conduction part 41 is connected with the heat conduction pipe 30. The heat conduction part 41 is directly connected with the nozzle 21, and the heat on the nozzle 21 is directly conducted to the heat conduction part 41; the connecting part 42 is used to connect the heat conduction part 41 and the heat conduction pipe 30, so that the heat on the heat conduction part 41 is conducted to the heat conduction pipe 30.

[0063] The heat conducting part 41 can be integrally arranged with the connecting part 42 to facilitate processing and forming. Alternatively, the heat conducting part 41 and the connecting part 42 can be separately arranged, and connected to each other to form an integral whole during installation.

[0064] Optionally in the embodiment, the heat conducting part 41 is annular, and the heat conducting part 41 is sleeved on the outer wall of the nozzle 21 to make the heat conducting part 41 in surface contact with the nozzle 21 to improve the heat conducting efficiency of the heat conducting part 41.

[0065] When the heat conducting part 41 is sleeved on the nozzle 21, the heat conducting part 41 can uniformly conduct heat to the surface of the nozzle 21 to reduce the temperature difference of different angles of the nozzle 21, thereby improving the safety of the nozzle 21. When two heat conducting pipes 30 are arranged, two connecting parts 42 are arranged on the heat conducting part 41, and the two connecting parts 42 are connected to the two heat conducting pipes 30 respectively to synchronously conduct heat from both sides.

[0066] Please refer to Figure 1 and Figure 2 In an embodiment of the present application, the heat conducting member 40 further comprises heat exchanging fins 50, the heat exchanging fins 50 are arranged on the surface of the heat conducting pipe 30, and one end of the connecting part 42 away from the heat conducting part 41 is connected to the heat exchanging fin 50. The heat exchanging fin 50 is a plurality of fin structures, and the heat exchanging fin 50 is arranged on the surface of the heat conducting pipe 30 to exchange heat with the heat conducting pipe 30. The connecting part 42 is connected to the heat exchanging fin 50 to improve the heat exchanging efficiency of the heat conducting member 40 and the heat conducting pipe 30.

[0067] The heat exchanging fins 50 are arranged at intervals, and one end of the connecting part 42 away from the heat conducting part 41 is inserted between adjacent heat exchanging fins 50. The heat exchanging fins 50 are arranged at intervals along the axial direction of the heat conducting pipe 30, so that the heat conducting member 40 can disperse heat to the heat conducting pipe 30, thereby avoiding the problem of local heat concentration of the heat conducting pipe 30 to improve the heat exchanging efficiency. The connecting part 42 is inserted between adjacent heat exchanging fins 50, so that two adjacent heat exchanging fins 50 can simultaneously exchange heat with one connecting part 42, and the heat on the connecting part 42 can be quickly conducted to the heat exchanging fin 50.

[0068] Optionally in the embodiment, the heat dissipation fin comprises a first heat exchange section 51 and a second heat exchange section 52, the first heat exchange section 51 is in an arc structure, the first heat exchange section 51 is attached to the surface of the heat conduction pipe 30, and the second heat exchange section 52 is connected with the connecting part 42. The first heat exchange section 51 is used to be attached to the heat conduction pipe 30 in an arc structure, so as to increase the contact area of the heat exchange fin 50 and the heat conduction pipe 30, and the second heat exchange section 52 is used to be connected with the connecting part 42.

[0069] The arc contact mode of the first heat exchange section 51 and the heat conduction pipe 30 can be determined according to the shape of the heat conduction pipe 30 and the heat exchange fin 50, so that the heat on the heat exchange fin 50 can be quickly guided to the heat conduction pipe 30. When a plurality of heat exchange fins 50 are provided, the heat exchange fins 50 can be regularly distributed, so that the heat conduction pipe 30 can be uniformly heated. The second heat exchange section 52 can be connected with the connecting part 42 and the surface of the shell 20 at the same time, so that the heat on the surface of the shell 20 and the connecting part 42 is guided to the heat exchange fin 50.

[0070] Please refer to Figure 2 In an embodiment of the present application, the burner further comprises a fixed plate 60, and the connecting part 42 is clamped between the fixed plate 60 and the inner wall of the shell 20. The fixed plate 60 presses the connecting part 42 against the inner wall of the shell 20, so that the connecting part 42 is relatively fixed. Since the heat conduction part 41 is annularly sleeved on the nozzle 21, when the connecting part 42 is pressed against the inner wall of the shell 20, the heat conduction part 40 is fixed on the shell 20 as a whole.

[0071] When the burner is manufactured, a support boss 24 can be arranged on the inner wall of the shell 20, and the two ends of the fixed plate 60 are connected and fixed with the support boss 24, so that the fixed plate 60 is fixed at a predetermined position. When the fixed plate 60 presses the connecting part 42 against the shell 20, the heat conduction part 40 can be kept in a predetermined state.

[0072] When a plurality of nozzles 21 are provided, the fixed plate 60 can be made of metal with good heat conduction performance. The fixed plate 60 can be used for heat exchange between the connecting parts 42 of different heat conduction parts 40, so that the different heat conduction parts 40 can be kept at a relatively balanced high temperature. When the heat conduction part 40 exchanges heat with the heat conduction pipe 30, the temperature of the heat conduction pipe 30 is also relatively more uniform, which helps to improve the heat exchange efficiency.

[0073] When the connecting portions 42 of the different heat-conducting members 40 are connected to each other by the fixing plate 60, the temperatures of the nozzles 21 corresponding to the different heat-conducting members 40 can be relatively more balanced, and the temperatures of the different nozzles 21 can be kept in a preset range, and the flow rates of the air flows formed by the different nozzles 21 can be kept in a relatively balanced state, which helps to improve the uniformity of air flow combustion in the combustion chamber 22 and improve the combustion efficiency of the gas.

[0074] To improve the stability of the heat-conducting member 40, in an embodiment, the fixing plate 60 is provided with a protruding portion 61 on the side facing the connecting portion 42, the protruding portion 61 is arranged at intervals along the length direction of the fixing plate 60, and the protruding portion 61 is clamped between the connecting portion 42 and the heat exchange fin 50. The protruding portion 61 forms a comb-shaped structure on the side surface of the fixing plate 60 facing the inner wall of the shell 20, and the connecting portion 42 and the heat exchange fin 50 are clamped between adjacent protruding portions 61 to prevent the connecting portion 42 or the heat exchange fin 50 from slipping. When a plurality of nozzles 21 are provided, the length of the fixing plate 60 is matched with the length of the heat-conducting pipe 30 to press the entire heat-conducting member 40 tightly on the heat-conducting pipe 30 and the shell 20.

[0075] Based on the above-mentioned burner, the application further provides an embodiment of a water heater.

[0076] Please refer to Figure 3 The water heater comprises a main body 10, a heat exchange cavity 11 formed in the main body 10, a heat exchange pipe 12 arranged in the heat exchange cavity 11, and the above-mentioned burner arranged on the main body 10, wherein the combustion chamber 22 of the burner is in communication with the heat exchange cavity 11.

[0077] The high-temperature flue gas formed by combustion in the combustion chamber 22 is delivered to the heat exchange cavity 11, and the heat exchange pipe 12 in the heat exchange cavity 11 is delivered with water. The high-temperature flue gas exchanges heat with the heat exchange pipe 12 to exchange heat with the water in the heat exchange pipe 12, so as to achieve the output of hot water.

[0078] In the embodiment, the water heater has a gas distribution chamber 18 and a mixed gas inlet 19 in communication with the gas distribution chamber 18, and the gas or the mixed gas of the gas and air enters the gas distribution chamber 18 through the mixed gas inlet 19, is injected into the combustion chamber 22 through the nozzles 21, and is combusted to form high-temperature flue gas.

[0079] The water heater also has a fume hood 15 and a fume discharge pipe 16 communicating with the fume hood 15. After the high-temperature fume exchanges heat with the heat exchange pipe 12 in the heat exchange cavity 11, the fume enters the fume hood 15 and is discharged through the fume discharge pipe 16. Since the nozzle 21 in the combustion chamber 22 can be cooled by the heat conducting member 40 and the heat conducting pipe 30, the flow rate of the air flow formed by the nozzle 21 is reduced, the combustion efficiency of the gas is improved, the content of carbon monoxide and nitrogen oxides in the fume is greatly reduced, and the harmful gas content of the fume discharged by the water heater can be effectively reduced.

[0080] In order to fully utilize the heat of the high-temperature fume formed by the combustion chamber 22, in the embodiment, the heat exchange pipe 12 is coiled in the heat exchange cavity 11 in a serpentine shape to prolong the heat exchange time of the water in the heat exchange pipe 12 and improve the heat utilization rate.

[0081] Please refer to Figure 4 In the embodiment, the heat conducting pipe 30 of the burner has a water inlet 31 and a water outlet 32, the heat exchange pipe 12 has a cold water inlet 13 and a hot water outlet 14, and the water outlet 32 of the heat conducting pipe 30 communicates with the cold water inlet 13 of the heat exchange pipe 12. The water inlet 31 of the heat conducting pipe 30 is used to input cold water, and the water outlet 32 of the heat conducting pipe 30 outputs water that has exchanged heat with the nozzle 21. The water temperature of the water outlet 32 is higher than that of the water inlet. The water that has exchanged heat with the nozzle 21 can enter the heat exchange pipe 12 through the connecting pipe 17. Since the water temperature of the water outlet 32 is relatively high, the water is delivered to the heat exchange pipe 12, the heat can be reused, the energy consumption of the heat exchange pipe 12 is reduced, and the heat utilization rate of the water heater is improved.

Claims

1. A burner for a water heater, characterized in that, The burner includes: A housing, the interior of which a combustion chamber is formed; A nozzle, disposed on the housing, is used to inject gas into the combustion chamber; A heat pipe, the heat pipe being disposed on the side surface of the housing facing the combustion chamber; and A heat-conducting component is disposed between the nozzle and the heat-conducting pipe, for guiding the heat from the nozzle to the heat-conducting pipe; The nozzle and the heat-conducting pipe are thermally connected through the housing; The heat-conducting component includes: A heat-conducting part, the heat-conducting part being attached to the outer wall of the nozzle; and A connecting part is provided, which is connected to the heat-conducting part, and the end of the connecting part away from the heat-conducting part is connected to the heat-conducting pipe. The heat exchange fins are disposed on the surface of the heat-conducting pipe, and the end of the connecting portion away from the heat-conducting portion is connected to the heat exchange fins; the heat exchange fins are a plurality of spaced-apart fins, and the end of the connecting portion away from the heat-conducting portion is inserted between adjacent heat exchange fins.

2. The burner as claimed in claim 1, characterized in that, The heat-conducting part is annular and is sleeved on the outer wall of the nozzle.

3. The burner as described in claim 1, characterized in that, The burner also includes a fixing plate, and the connecting part is snapped between the fixing plate and the inner wall of the housing.

4. The burner as described in claim 3, characterized in that, The fixing plate has a protrusion on one side facing the connecting part, and the protrusion is spaced apart along the length of the fixing plate. The protrusion is engaged between the connecting part and the heat exchange fins.

5. The burner according to any one of claims 1 to 4, characterized in that, The heat exchange fins include a first heat exchange section and a second heat exchange section. The first heat exchange section has an arc-shaped structure and is attached to the surface of the heat pipe. The second heat exchange section is connected to the connecting part.

6. The burner according to any one of claims 1 to 4, characterized in that, The housing has a recessed slot on the side facing the combustion chamber, and the heat pipe is disposed in the slot.

7. The burner according to any one of claims 1 to 4, characterized in that, The number of nozzles is multiple, and the number of heat-conducting elements is multiple, with each heat-conducting element corresponding to one of the nozzles.

8. The burner as claimed in claim 7, characterized in that, There are two heat pipes, which are respectively located on both sides of the nozzle and are interconnected.

9. The burner according to any one of claims 1 to 4, characterized in that, The burner also includes: A preheater is used to preheat the gas to a target temperature before delivering it to the combustion chamber; Herein, gas and / or air are injected into the combustion chamber through the nozzle, causing a high-temperature air combustion reaction to occur in the combustion chamber.

10. A water heater, characterized in that, include: The main body, wherein a heat exchange cavity is formed within the main body; Heat exchange tubes are disposed inside the heat exchange cavity; as well as The burner as described in any one of claims 1 to 9, wherein the burner is disposed on the main body, and the combustion chamber of the burner is connected to the heat exchange chamber.

11. The water heater as described in claim 10, characterized in that, The heat-conducting tube of the burner has a water inlet and a water outlet, and the heat exchange tube has a cold water inlet and a hot water outlet. The water outlet of the heat-conducting tube is connected to the cold water inlet of the heat exchange tube.

12. The water heater as described in claim 10, characterized in that, The heat exchange tube is coiled in a serpentine shape inside the heat exchange cavity.

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